CN113472470B

CN113472470B - Cell search method under multiple operators, electronic device and computer-readable storage medium

Info

Publication number: CN113472470B
Application number: CN202110602073.8A
Authority: CN
Inventors: 智钢; 丁明; 徐自翔; 魏珍荣
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-04-19
Anticipated expiration: 2041-05-31
Also published as: CN113472470A

Abstract

A cell search method and electronic equipment under multiple operators relate to the technical field of communication and solve the problem that in the prior art, the time for UE to search cells is long. The method comprises the following steps: under the condition that the UE meets the preset condition, the UE executes network searching operation; the UE stores the information of registered public land mobile network RPLMN, and the preset condition comprises starting up or cell reselection; the network searching operation comprises the following steps: under the condition that the HPLMN of the UE is the predefined PLMN, the UE skips the searching flow under the RPLMN and searches the HPLMN; under the condition that the frequency point is searched under the HPLMN, the UE sends registration information to the network equipment corresponding to the frequency point, and the registration information is used for requesting to access the network equipment; the areas or countries corresponding to the predefined PLMNs have co-established networks, and the network equipment providing the co-established networks corresponds to the PLMNs.

Description

Cell search method under multiple operators, electronic device and computer-readable storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a cell search method and an electronic device for multiple operators.

Background

After a User Equipment (UE) is powered on, a cell search needs to be performed on a selected Public Land Mobile Network (PLMN), and the UE accesses to an available cell after searching for the cell, and can initiate registration in the cell after successful access. Upon successful registration to a cell, the UE may enjoy network services in the cell. Therefore, the shorter the duration for the UE to perform cell search, the better the user experience.

Currently, the time duration for the UE to perform the cell search mainly depends on the cell search strategy of the UE. The cell search strategy mainly includes that cell search is performed under which PLMN first, and then cell search is performed under which PLMN. A conventional cell search strategy is to search under a Subscriber Identity Module (SIM) card (RPLMN) (such as a network of an operator a) when a network code of a Registered PLMN is stored in the card file of the SIM card of the UE after the UE is powered on. If no cell is searched under the RPLMN, the searching can be carried out in turn according to the priority order of the currently searched PLMN (not including the RPLMN). If the currently searched PLMN includes a local public land mobile network (Home PLMN, HPLMN, such as the network of operator B), and the priority of the HPLMN is the highest, the UE switches to continue the cell search under the HPLMN. Thereafter, if no cell is searched under the HPLMN, the UE continues to search under other PLMNs according to the priority order. This results in a long time taken for the UE to perform cell search.

Disclosure of Invention

In view of this, embodiments of the present disclosure provide a cell search method and an electronic device under multiple operators, which can shorten a time period for a UE to perform cell search.

In a first aspect, an embodiment of the present application provides a cell search method under multiple operators, where the method may be applied to a user equipment UE. Under the condition that the UE meets the preset condition, the UE executes network searching operation; the UE stores the information of registered public land mobile network RPLMN, and the preset condition comprises starting up or cell reselection; the network searching operation comprises the following steps: under the condition that the HPLMN of the UE is the predefined PLMN, the UE skips the searching flow under the RPLMN and searches the HPLMN; under the condition that the frequency point is searched under the HPLMN, the UE sends registration information to the network equipment corresponding to the frequency point, and the registration information is used for requesting to access the network equipment; the areas or countries corresponding to the predefined PLMNs have co-established networks, and the network equipment providing the co-established networks corresponds to the PLMNs.

In the foregoing embodiment, in the cell search method under multiple operators provided in the embodiment of the present application, when the UE satisfies the preset condition, the UE stores information of the RPLMN. At this time, under the condition that the HPLMN of the UE is the predefined PLMN, the UE skips the process of searching under the RPLMN and searches the HPLMN; under the condition that the frequency point is searched under the HPLMN, the UE sends registration information to the network equipment corresponding to the frequency point, and the registration information is used for requesting to access the network equipment; therefore, the time for the UE to search the RPLMN can be saved, and the time for the UE to search the cell can be shortened.

In addition, when the PLMN of the cell where the UE is located before the UE is powered off is different from the PLMN of the cell where the UE is located after the UE is powered on, the frequency point corresponding to the RPLMN cannot be searched when the RPLMN is searched after the UE is powered on. In the cell searching method under multiple operators, the UE stores the information of the RPLMN under the condition that the UE meets the preset condition. At this time, under the condition that the HPLMN of the UE is the predefined PLMN, the UE skips the process of searching under the RPLMN and performs the process of searching the HPLMN, so that the time of searching the RPLMN by the UE can be saved, and the time for the UE to perform cell search can be shortened.

In a possible design manner of the first aspect, in a case that the HPLMN of the UE is a predefined PLMN, the UE skips a process of searching under the RPLMN, and before searching for the HPLMN, the method further includes: and the UE acquires the position information of the UE and determines the country of the UE to be the predefined country according to the position information.

In the above embodiments, there are differences in the networks deployed by operators in different regions, or countries. Therefore, according to the cell search method under multiple operators provided by the embodiment of the application, before the UE searches the HPLMN, the UE needs to obtain the location information, and determine whether the country where the UE is located is the predefined country according to the location information. If yes, skipping the process of searching the RPLMN, and directly searching the HPLMN, so that the time of searching the RPLMN by the UE can be saved, the time for the UE to search the cell can be shortened, and the user experience can be ensured.

In another possible design manner of the first aspect, a first operator to which a subscriber identity module SIM card of the UE belongs and a second operator jointly deploy network equipment, and a PLMN of the second operator is an EPLMN of the UE; the method further comprises the following steps: and under the conditions that the frequency point is not searched under the HPLMN and the frequency point of the EPLMN is searched, the UE sends registration information to the network equipment corresponding to the frequency point of the EPLMN.

In the foregoing embodiment, in the cell search method under multiple operators provided in the embodiment of the present application, a first operator to which a SIM card of the UE belongs and a second operator jointly deploy network equipment, and a PLMN of the second operator is an EPLMN of the UE. At this time, under the condition that the frequency point is not searched under the HPLMN and the frequency point of the EPLMN is searched, the UE sends the registration information to the network device corresponding to the frequency point of the EPLMN. Instead of searching for the frequency point under the HPLMN, even if the frequency point of the EPLMN is searched, the UE cannot immediately send the registration information to the network device corresponding to the frequency point, and when the frequency point is not searched under the HPLMN and the EPLMN is searched, the UE can send the registration information to the network device corresponding to the frequency point only if the frequency point is searched under the EPLMN. Therefore, the UE can send the registration information to the network equipment more quickly, the time for the UE to search the cell is shortened, and the user experience is ensured.

In another possible design manner of the first aspect, the searching under the HPLMN specifically includes: searching a historical resident frequency point of a first standard of the HPLMN by the UE; under the condition that a frequency point is not searched under a historical residing frequency point of a first standard of the HPLMN, the UE searches a historical residing frequency point of a second standard of the HPLMN, network equipment of the second standard allows the UE to be accessed in a roaming mode, and the first standard is different from the second standard; under the condition that no frequency point is searched under the historical resident frequency point of the second system of the HPLMN and no frequency point of the EPLMN is searched, the UE searches the full frequency band of the first system of the HPLMN; and under the condition that the frequency point is not searched under the full frequency band of the first standard of the HPLMN, the UE searches the full frequency band of the second standard of the HPLMN.

In the foregoing embodiment, in the cell search method under multiple operators provided in this embodiment of the present application, a first operator to which a SIM card of the UE belongs and a second operator jointly deploy network equipment, a PLMN of the second operator is an EPLMN of the UE, and the network equipment of the second standard allows the UE to access in a roaming manner. Therefore, when the historical resident frequency point of the second standard of the HPLMN is searched, whether the frequency point of the EPLMN is searched or not can be determined. Instead of searching for the frequency point under the HPLMN, even if the frequency point of the EPLMN is searched, the UE cannot immediately send the registration information to the network device corresponding to the frequency point, and when the frequency point is not searched under the HPLMN and the EPLMN is searched, the UE can send the registration information to the network device corresponding to the frequency point only if the frequency point is searched under the EPLMN. Therefore, the UE can send the registration information to the network equipment more quickly, the time for the UE to search the cell is shortened, and the user experience is ensured.

In another possible design manner of the first aspect, when the frequency point is not searched for under the HPLMN and the frequency point of the EPLMN is searched for, the UE sends the registration information to the network device corresponding to the frequency point of the EPLMN, which specifically includes: under the condition that the frequency point is not searched under the historical resident frequency point of the second standard of the HPLMN and the frequency point of the EPLMN is searched, the UE sends registration information to network equipment corresponding to the frequency point of the EPLMN; or, under the conditions that the frequency point is not searched under the full frequency band of the second standard of the HPLMN and the frequency point of the EPLMN is searched, the UE sends the registration information to the network device corresponding to the frequency point of the EPLMN.

In the foregoing embodiment, in the cell search method under multiple operators provided in this embodiment of the present application, a first operator to which a SIM card of the UE belongs and a second operator jointly deploy network equipment, a PLMN of the second operator is an EPLMN of the UE, and the network equipment of the second standard allows the UE to access in a roaming manner. Therefore, when the historical resident frequency point of the second standard of the HPLMN is searched, whether the frequency point of the EPLMN is searched or not can be determined. Therefore, under the condition that the frequency point is not searched under the historical residing frequency point of the second standard of the HPLMN and the frequency point of the EPLMN is searched, the UE sends the registration information to the network equipment corresponding to the frequency point of the EPLMN. Or, under the conditions that the frequency point is not searched under the full frequency band of the second standard of the HPLMN and the frequency point of the EPLMN is searched, the UE sends the registration information to the network device corresponding to the frequency point of the EPLMN. Instead of searching for the frequency point under the HPLMN, even if the frequency point of the EPLMN is searched, the UE cannot immediately send the registration information to the network device corresponding to the frequency point, and when the frequency point is not searched under the HPLMN and the EPLMN is searched, the UE can send the registration information to the network device corresponding to the frequency point only if the frequency point is searched under the EPLMN. Therefore, the UE can send the registration information to the network equipment more quickly, the time for the UE to search the cell is shortened, and the user experience is ensured.

In another possible design manner of the first aspect, a first operator and a second operator to which a subscriber identity module SIM card used by the UE belongs jointly deploy network equipment having a first network standard, a PLMN of the second operator is an FPLMN of the UE in the first standard, the network equipment of the second standard allows the UE to access in a roaming manner, and the first standard is different from the second standard; the method further comprises the following steps: under the condition that the frequency point is not searched under the HPLMN, the UE skips the process of searching the frequency point of the first standard of the EPLMN and searches the frequency point of the second standard of the EPLMN; the frequency points of the first standard comprise historical residing frequency points under the first standard and frequency points in a full frequency band, and the frequency points of the second standard comprise historical residing frequency points under the second standard and frequency points in the full frequency band.

In the above embodiment, a first operator and a second operator to which a subscriber identity module SIM card used by the UE belongs jointly deploy network equipment having a first network standard, a PLMN of the second operator is an FPLMN of the UE in the first standard, the network equipment of the second standard allows the UE to access in a roaming manner, and the first standard is different from the second standard. Because the network standard deployed by the second operator is the network equipment of the second standard, the network with the network standard of the first standard is not provided. Therefore, when the network standard deployed by the second operator is the cell of the network device of the second standard, even if the frequency point of the first standard of the PLMN of the second operator is searched, the UE cannot search the frequency point of the first standard of the PLMN of the second operator. Therefore, according to the cell search method under multiple operators provided by the embodiment of the application, under the condition that the frequency point is not searched under the HPLMN, the UE skips the process of searching the frequency point of the first standard of the EPLMN and searches the frequency point of the second standard of the EPLMN, so that the time occupied by the UE in the process of searching the frequency point of the first standard of the EPLMN can be saved, the time used by the UE for cell search is shortened, and the user experience is ensured.

In another possible design manner of the first aspect, the method further includes: under the condition that the frequency point is searched under the historical resident frequency point of the second standard, the UE sends registration information to the network equipment corresponding to the frequency point; or, the UE sends the registration information to the network device corresponding to the frequency point when the frequency point is searched in the full frequency band of the second standard.

In the above embodiment, since the network standard deployed by the second operator is the network device of the second standard, a network with the network standard of the first standard is not provided. Therefore, when the network standard deployed by the second operator is the cell of the network device of the second standard, even if the frequency point of the first standard of the PLMN of the second operator is searched, the UE cannot search the frequency point of the first standard of the PLMN of the second operator. However, when the UE searches for the frequency point of the second standard of the PLMN of the second operator, the UE may search for the frequency point. Therefore, according to the cell search method under multiple operators provided by the embodiment of the application, after skipping the process of searching the frequency point of the first standard of the EPLMN, if the frequency point is searched under the historical resident frequency point of the second standard, the UE sends the registration information to the network device corresponding to the frequency point; or, the UE sends the registration information to the network device corresponding to the frequency point when the frequency point is searched in the full frequency band of the second standard. Therefore, the time occupied by the UE in the searching process of the frequency point of the first standard of the EPLMN can be saved, the time used by the UE for cell searching is shortened, and the user experience is ensured.

In another possible design manner of the first aspect, the searching under the HPLMN specifically includes: searching historical resident frequency points of each system of the HPLMN; under the condition that no frequency point is searched under the historical residing frequency point of each system of the HPLMN, the UE searches the historical residing frequency point of the PLMN searched when searching the HPLMN; under the condition that no frequency point is searched under the historical resident frequency point of the PLMN searched when the HPLMN is searched, the UE searches the full frequency band of each system of the HPLMN; and under the condition that the frequency point is not searched under the full frequency band of each system of the HPLMN, the UE searches the full frequency band of the PLMN searched when the HPLMN is searched.

In the above embodiment, since the full band of each system of any PLMN is searched, the time length of the occupied cell search is long. Therefore, according to the cell search method under multiple operators provided by the embodiment of the application, when the historical resident frequency point of each system of the HPLMN is searched; under the condition that no frequency point is searched under the historical residing frequency point of each system of the HPLMN, the UE searches the historical residing frequency point of the PLMN searched when searching the HPLMN; therefore, the switching of the PLMN can be carried out more quickly, and the UE can be ensured to search the frequency points more quickly. Under the condition that no frequency point is searched under the historical resident frequency point of the PLMN searched when the HPLMN is searched, the UE searches the full frequency band of each system of the HPLMN; and under the condition that the frequency point is not searched under the full frequency band of each system of the HPLMN, the UE searches the full frequency band of the PLMN searched when the HPLMN is searched. Therefore, the PLMN switching is accelerated, the UE can be ensured to discover the available frequency points more quickly, and the user experience is improved.

In another possible design manner of the first aspect, the predefined PLMN is 46015, the first standard is 5G, and the second standard is 4G.

In the above embodiment, because the networks deployed by different operators are different, in the cell search method under multiple operators provided in the embodiment of the present application, the UE needs to determine that the HPLMN is 46015, and when the UE satisfies the preset condition, the UE stores the information of the registered RPLMN of the public land mobile network, at this time, the UE may determine that the process of searching for the RPLMN needs to be skipped, search for the frequency point of 5G of the HPLMN, and search for the frequency point of 4G of the HPLMN when the frequency point of 5G of the HPLMN is not searched, so that the time for the UE to search for the RPLMN is saved while the frequency point is ensured to be searched, and the time for the UE to perform cell search is shortened.

In another possible design manner of the first aspect, the obtaining, by the UE, the location information of the UE includes: and the UE acquires the current coordinate of the UE. Wherein the coordinates are used to indicate a geographic location where the UE is currently located.

In the above embodiment, because the networks deployed by operators in different regions or countries are different, in the cell search method under multiple operators provided in the embodiment of the present application, the UE needs to obtain the current coordinate after being powered on, so that the current geographic location can be determined according to the coordinate, and the current region or country can be determined according to the geographic location. Further, whether the cell search method under multiple operators provided by the embodiment of the application is executed or not can be determined, and the phenomenon that the time for the UE to search the cell is long due to the fact that the current country is not the predefined country is avoided.

In another possible design manner of the first aspect, the obtaining, by the UE, the location information of the UE includes: the UE carries out emergency residence to the cell which is searched currently and can be accessed to the network; wherein, the accessible network corresponds to a PLMN; and the UE determines the position information of the UE according to the PLMN which can be accessed to the network.

In the above embodiment, because the networks deployed by operators in different regions or countries are different, in the cell search method under multiple operators provided in the embodiment of the present application, after the UE is powered on, the UE needs to perform emergency camping on a cell which is currently searched and accessible to a network, so that the location information of the UE can be determined according to the PLMN of the accessible network, and the region or country where the UE is currently located can be determined according to the location information. Further, whether the cell search method under multiple operators provided by the embodiment of the application is executed or not can be determined, and the phenomenon that the time for the UE to search the cell is long due to the fact that the current country is not the predefined country is avoided.

In a second aspect, an embodiment of the present application provides a cell search method under multiple operators, where the method may be applied to a UE. Under the condition that the UE is successfully resided in a cell of network equipment, the service of the UE is interrupted, and when the UE requests to recover the service, the UE searches a historical residence frequency point of a first standard of the HPLMN; under the condition that a frequency point is not searched under the historical residing frequency point of the first standard of the HPLMN, the UE searches the historical residing frequency point of the second standard of the EPLMN of the UE; under the condition that no frequency point is searched under the historical resident frequency point of the second system of the EPLMN, the UE searches the full frequency band of the first system of the HPLMN; under the condition that the frequency point is not searched under the full frequency band of the first standard of the HPLMN, the UE searches the full frequency band of the second standard of the EPLMN; under the condition that the frequency point is not searched under the full frequency band of the second system of the EPLMN, the UE searches the PLMN searched when the HPLMN is searched; and under the condition that the frequency point is searched, the UE sends registration information to the network equipment corresponding to the searched frequency point.

In the above embodiment, as in the prior art, when the UE successfully resides in the cell of the network device, the service of the UE is not interrupted, and the UE preferentially searches the historical residence frequency point of the first standard of the HPLMN or searches the full frequency band of the first standard of the HPLMN when requesting to recover the service, and at this time, when the PLMN of the cell where the UE is located is different from the HPLMN, the service cannot be recovered in time. Therefore, in the cell search method under multiple operators provided in the embodiment of the present application, a first operator and a second operator to which a SIM card of the UE belongs commonly deploy network equipment, a PLMN of the second operator is an EPLMN of the UE, the network equipment of the second standard allows the UE to access in a roaming manner, and the first standard is different from the second standard. Enabling the UE to search the historical resident frequency point of the first standard of the HPLMN in the coverage range of the network equipment with the first standard of the network standard owned by the first operator or the coverage range of the network equipment with the second standard of the network standard owned by the second operator; under the condition that a frequency point is not searched under the historical residing frequency point of the first standard of the HPLMN, the UE searches the historical residing frequency point of the second standard of the EPLMN of the UE; under the condition that no frequency point is searched under the historical resident frequency point of the second system of the EPLMN, the UE searches the full frequency band of the first system of the HPLMN; under the condition that the frequency point is not searched under the full frequency band of the first standard of the HPLMN, the UE searches the full frequency band of the second standard of the EPLMN; under the condition that the frequency point is not searched under the full frequency band of the second system of the EPLMN, the UE searches the PLMN searched when the HPLMN is searched; therefore, the UE can search available frequency points more quickly, the time of the UE for searching the RPLMN is saved, and the time of the UE for searching the cell is shortened.

In a third aspect, an embodiment of the present application provides a cell search apparatus under multiple operators, including a transceiver unit and a processing unit. The cell search apparatus under multiple operators can be applied to User Equipment (UE). Under the condition that the UE meets the preset condition, the UE executes network searching operation; the UE stores the information of registered public land mobile network RPLMN, and the preset condition comprises starting up or cell reselection; the network searching operation comprises the following steps:

and the processing unit is used for skipping the process of searching under the RPLMN and searching the HPLMN under the condition that the HPLMN of the UE is the predefined PLMN. And the processing unit is also used for controlling the transceiver unit to send registration information to the network equipment corresponding to the frequency point under the condition that the frequency point is searched under the HPLMN, and the registration information is used for requesting to access the network equipment. The areas or countries corresponding to the predefined PLMNs have co-established networks, and the network equipment providing the co-established networks corresponds to the PLMNs.

In a possible design manner of the third aspect, the transceiver unit is configured to acquire location information of the UE. And the processing unit is also used for determining the country in which the UE is located to be the predefined country according to the position information acquired by the transceiving unit.

In another possible design manner of the third aspect, a first operator to which a subscriber identity module SIM card of the UE belongs and a second operator jointly deploy network equipment, and a PLMN of the second operator is an EPLMN of the UE; and the processing unit is also used for sending the registration information to the network equipment corresponding to the frequency point of the EPLMN by the UE under the conditions that the frequency point is not searched under the HPLMN and the frequency point of the EPLMN is searched.

In another possible design manner of the third aspect, the processing unit is specifically configured to search the historical camping frequency point of the first standard of the HPLMN. And the processing unit is specifically used for searching the historical residing frequency point of the second system of the HPLMN under the condition that the frequency point is not searched under the historical residing frequency point of the first system of the HPLMN, the network equipment of the second system allows the UE to be accessed in a roaming mode, and the first system is different from the second system. And the processing unit is specifically used for searching the full frequency band of the first system of the HPLMN under the conditions that no frequency point is searched under the historical resident frequency point of the second system of the HPLMN and no frequency point of the EPLMN is searched. And the processing unit is specifically used for searching the full frequency band of the second system of the HPLMN by the UE under the condition that the frequency point is not searched under the full frequency band of the first system of the HPLMN.

In another possible design manner of the third aspect, the processing unit is specifically configured to control the transceiver unit to send the registration information to the network device corresponding to the frequency point of the EPLMN when the frequency point is not searched at the historical residence frequency point of the second standard of the HPLMN and the frequency point of the EPLMN is searched. Or, the processing unit is specifically configured to send the registration information to the network device corresponding to the frequency point of the EPLMN when the frequency point is not searched in the full frequency band of the second standard of the HPLMN and the frequency point of the EPLMN is searched.

In another possible design manner of the third aspect, a first operator and a second operator to which a subscriber identity module SIM card used by the UE belongs jointly deploy network equipment having a first network standard, a PLMN of the second operator is an FPLMN of the UE in the first standard, the network equipment of the second standard allows the UE to access in a roaming manner, and the first standard is different from the second standard; and the processing unit is specifically used for skipping the process of searching the frequency point of the first standard of the EPLMN and searching the frequency point of the second standard of the EPLMN under the condition that the frequency point is not searched under the HPLMN. The frequency points of the first standard comprise historical residing frequency points under the first standard and frequency points in a full frequency band, and the frequency points of the second standard comprise historical residing frequency points under the second standard and frequency points in the full frequency band.

In another possible design manner of the third aspect, the processing unit is specifically configured to control the transceiver unit to send the registration information to the network device corresponding to the frequency point when the frequency point is searched under the historical camping frequency point of the second standard. Or, the processing unit is specifically configured to control the transceiver unit to send the registration information to the network device corresponding to the frequency point when the frequency point is searched in the full frequency band of the second standard.

In another possible design manner of the third aspect, the processing unit is specifically configured to search the historical camping frequency point of each system of the HPLMN. And the processing unit is specifically used for searching the historical residing frequency point of the PLMN searched when the HPLMN is searched under the condition that the frequency point is not searched under the historical residing frequency point of each system of the HPLMN. And the processing unit is specifically used for searching the full frequency band of each system of the HPLMN under the condition that no frequency point is searched under the historical resident frequency point of the PLMN searched during the searching of the HPLMN. And the processing unit is specifically used for searching the full frequency band of the PLMN searched when the HPLMN is searched under the condition that the frequency point is not searched under the full frequency band of each system of the HPLMN.

In another possible design manner of the third aspect, the predefined PLMN is 46015, the first standard is 5G, and the second standard is 4G.

In another possible design manner of the third aspect, the transceiver unit is specifically configured to acquire a current coordinate of the UE; wherein the coordinates are used to indicate the geographical location where the UE is currently located.

In another possible design manner of the third aspect, the processing unit is specifically configured to perform emergency camping on a currently searched cell that is accessible to the network; wherein, the accessible network corresponds to a PLMN; and the processing unit is specifically configured to determine the location information of the UE according to the PLMN accessible to the network.

In a fourth aspect, an embodiment of the present application provides a cell search apparatus under multiple operators, including a transceiver unit and a processing unit. The cell search apparatus under multiple operators can be applied to User Equipment (UE). And the processing unit is used for searching the historical residing frequency point of the first standard of the HPLMN when the service of the UE is interrupted and the service is required to be recovered under the condition that the UE is successfully resided in the cell of the network equipment. And the processing unit is further used for searching the historical residing frequency point of the second standard of the EPLMN of the UE under the condition that the frequency point is not searched under the historical residing frequency point of the first standard of the HPLMN. The processing unit is also used for searching the full frequency band of the first system of the HPLMN under the condition that the frequency point is not searched under the historical resident frequency point of the second system of the EPLMN; and the processing unit is also used for searching the full frequency band of the second system of the EPLMN under the condition that the frequency point is not searched under the full frequency band of the first system of the HPLMN. The processing unit is also used for searching the searched PLMN when the HPLMN is searched under the condition that the frequency point is not searched under the full frequency band of the second system of the EPLMN; and the processing unit is also used for controlling the transceiver unit to send the registration information to the network equipment corresponding to the searched frequency point under the condition that the frequency point is searched.

In a fifth aspect, an embodiment of the present application provides an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the instructions to cause the electronic device to perform the following acts: under the condition that the electronic equipment meets the preset condition, the electronic equipment executes network searching operation; the method comprises the steps that the electronic equipment stores information of a Registered Public Land Mobile Network (RPLMN), and preset conditions comprise starting up or cell reselection; the network searching operation comprises the following steps: under the condition that the HPLMN of the electronic equipment is the predefined PLMN, the electronic equipment skips the process of searching under the RPLMN and searches the HPLMN; under the condition that the frequency point is searched under the HPLMN, the electronic equipment sends registration information to the network equipment corresponding to the frequency point, and the registration information is used for requesting to access the network equipment; the areas or countries corresponding to the predefined PLMNs have co-established networks, and the network equipment providing the co-established networks corresponds to the PLMNs.

In one possible design of the fifth aspect, the processor is configured to execute the instructions, so that the electronic device further performs the following actions: the electronic equipment acquires the position information of the electronic equipment and determines that the country where the electronic equipment is located is a predefined country according to the position information.

In another possible design manner of the fifth aspect, a first operator to which a subscriber identity module SIM card of the electronic device belongs and a second operator jointly deploy the network device, and a PLMN of the second operator is an EPLMN of the electronic device; the processor is configured to execute the instructions such that the electronic device further performs the following acts: and under the conditions that the frequency point is not searched under the HPLMN and the frequency point of the EPLMN is searched, the electronic equipment sends registration information to the network equipment corresponding to the frequency point of the EPLMN.

In another possible design of the fifth aspect, the processor is configured to execute the instructions, so that the electronic device specifically performs the following actions: searching a historical resident frequency point of a first standard of the HPLMN by the electronic equipment; under the condition that a frequency point is not searched under a historical residing frequency point of a first standard of the HPLMN, the electronic equipment searches a historical residing frequency point of a second standard of the HPLMN, network equipment of the second standard allows the electronic equipment to be accessed in a roaming mode, and the first standard is different from the second standard; under the condition that no frequency point is searched under the historical resident frequency point of the second system of the HPLMN and no frequency point of the EPLMN is searched, the electronic equipment searches the full frequency band of the first system of the HPLMN; and under the condition that the frequency point is not searched under the full frequency band of the first standard of the HPLMN, the electronic equipment searches the full frequency band of the second standard of the HPLMN.

In another possible design of the fifth aspect, the processor is configured to execute the instructions, so that the electronic device specifically performs the following actions: under the condition that the frequency point is not searched under the historical resident frequency point of the second standard of the HPLMN and the frequency point of the EPLMN is searched, the electronic equipment sends registration information to network equipment corresponding to the frequency point of the EPLMN; or, under the conditions that the frequency point is not searched under the full frequency band of the second standard of the HPLMN and the frequency point of the EPLMN is searched, the electronic equipment sends the registration information to the network equipment corresponding to the frequency point of the EPLMN.

In another possible design manner of the fifth aspect, a first operator and a second operator to which a subscriber identity module SIM card used by the electronic device belongs jointly deploy network devices with a network standard of a first system, a PLMN of the second operator is a FPLMN of the electronic device in the first system, the network devices of the second system allow the UE to access in a roaming manner, and the first system is different from the second system; the processor is configured to execute the instructions such that the electronic device further performs the following acts: under the condition that the frequency point is not searched under the HPLMN, the electronic equipment skips the process of searching the frequency point of the first standard of the EPLMN and searches the frequency point of the second standard of the EPLMN; the frequency points of the first standard comprise historical residing frequency points under the first standard and frequency points in a full frequency band, and the frequency points of the second standard comprise historical residing frequency points under the second standard and frequency points in the full frequency band.

In another possible design of the fifth aspect, the processor is configured to execute the instructions, so that the electronic device specifically performs the following actions: under the condition that the frequency point is searched under the historical resident frequency point of the second standard, the electronic equipment sends registration information to the network equipment corresponding to the frequency point; or, the electronic device sends the registration information to the network device corresponding to the frequency point when the frequency point is searched in the full frequency band of the second standard.

In another possible design of the fifth aspect, the processor is configured to execute the instructions, so that the electronic device specifically performs the following actions: searching historical resident frequency points of each system of the HPLMN; under the condition that no frequency point is searched under the historical residing frequency point of each system of the HPLMN, the electronic equipment searches the historical residing frequency point of the PLMN searched when the HPLMN is searched; under the condition that no frequency point is searched under the historical resident frequency point of the PLMN searched when the HPLMN is searched, the electronic equipment searches the full frequency band of each system of the HPLMN; and under the condition that the frequency point is not searched under the full frequency band of each system of the HPLMN, the electronic equipment searches the full frequency band of the PLMN searched when the HPLMN is searched.

In another possible design manner of the fifth aspect, the predefined PLMN is 46015, the first standard is 5G, and the second standard is 4G.

In another possible design of the fifth aspect, the processor is configured to execute the instructions, so that the electronic device specifically performs the following actions: the electronic equipment acquires the current coordinates of the electronic equipment; the coordinates are used for indicating the current geographic position of the electronic equipment.

In another possible design of the fifth aspect, the processor is configured to execute the instructions, so that the electronic device specifically performs the following actions: the electronic equipment carries out emergency residence to the cell which is searched currently and can be accessed to the network; wherein, the accessible network corresponds to a PLMN; the electronic equipment determines the position information of the electronic equipment according to the PLMN which can be accessed to the network.

In a sixth aspect, an embodiment of the present application provides an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the instructions to cause the electronic device to perform the following acts: under the condition that the electronic equipment is successfully resided in the cell of the network equipment, the service of the electronic equipment is interrupted, and when the service is requested to be recovered, the electronic equipment searches the historical residence frequency point of the first standard of the HPLMN; under the condition that a frequency point is not searched under a historical residing frequency point of a first standard of the HPLMN, the electronic equipment searches the historical residing frequency point of a second standard of the EPLMN; under the condition that no frequency point is searched under the historical resident frequency point of the second system of the EPLMN, the electronic equipment searches the full frequency band of the first system of the HPLMN; under the condition that the frequency point is not searched under the full frequency band of the first standard of the HPLMN, the electronic equipment searches the full frequency band of the second standard of the EPLMN; under the condition that the frequency point is not searched under the full frequency band of the second system of the EPLMN, the electronic equipment searches the PLMN searched when the HPLMN is searched; and under the condition that the frequency point is searched, the electronic equipment sends registration information to the network equipment corresponding to the searched frequency point.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, where instructions, when executed by a processor of an electronic device, enable the electronic device to perform the cell search method under multiple operators as provided in the first aspect.

In an eighth aspect, an embodiment of the present application provides a computer program product, which includes, when the computer program product runs on a computer, causing the computer to execute the cell search method under multiple operators as provided in the first aspect.

It is to be understood that the system according to the third aspect and any possible design thereof provided above, the electronic device according to the fifth aspect, the computer storage medium according to the seventh aspect, and the computer program product according to the eighth aspect are all configured to perform the corresponding method provided above, and therefore, the beneficial effects that can be achieved by the system according to the third aspect can refer to the beneficial effects in the cell search method under multiple operators provided above, and are not described herein again.

In a ninth aspect, embodiments of the present application provide a computer-readable storage medium, where instructions, when executed by a processor of an electronic device, enable the electronic device to perform the cell search method under multiple operators as provided in the second aspect.

In a tenth aspect, embodiments of the present application provide a computer program product, which includes, when the computer program product runs on a computer, causing the computer to execute the cell search method under multiple operators as provided in the second aspect.

It is to be understood that the system according to the fourth aspect and any possible design thereof provided above, the electronic device according to the sixth aspect, the computer storage medium according to the ninth aspect, and the computer program product according to the tenth aspect are all configured to perform the corresponding methods provided above, and therefore, the beneficial effects achieved by the system according to the fourth aspect and any possible design thereof may refer to the beneficial effects of the cell search method under multiple operators provided above in the second aspect, and are not described herein again.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating a cell search process performed by a UE in the prior art;

fig. 3 is one of schematic diagrams of a UE that may access a cell according to an embodiment of the present disclosure;

fig. 4 is a schematic view of a scenario of a cell search method under multiple operators according to an embodiment of the present disclosure;

fig. 5 is a second scenario diagram of a cell search method under multiple operators according to an embodiment of the present application;

fig. 6 is a third scenario diagram of a cell search method under multiple operators according to the embodiment of the present application;

fig. 7 is a fourth schematic view of a scenario of a cell search method under multiple operators according to an embodiment of the present application;

fig. 8 is a fifth scenario diagram illustrating a cell search method under multiple operators according to an embodiment of the present disclosure;

fig. 9 is a schematic flowchart of a cell search method under multiple operators according to an embodiment of the present disclosure;

fig. 10 is a second flowchart illustrating a cell search method under multiple operators according to an embodiment of the present application;

fig. 11 is a third schematic flowchart of a cell search method under multiple operators according to an embodiment of the present application;

fig. 12 is a fourth schematic flowchart of a cell search method under multiple operators according to an embodiment of the present application;

fig. 13 is a fifth flowchart illustrating a cell search method under multiple operators according to an embodiment of the present disclosure;

fig. 14 is a sixth schematic flowchart of a cell search method under multiple operators according to an embodiment of the present application;

fig. 15 is a seventh schematic flowchart illustrating a cell search method under multiple operators according to an embodiment of the present application;

fig. 16 is an eighth schematic flowchart illustrating a cell search method under multiple operators according to an embodiment of the present application;

fig. 17 is a ninth flowchart illustrating a cell search method under multiple operators according to an embodiment of the present application;

FIG. 18 is a second flowchart illustrating a cell search performed by a UE according to the prior art;

fig. 19 is a ten-step schematic flowchart of a cell search method under multiple operators according to an embodiment of the present application;

fig. 20 is a sixth schematic view of a scenario of a cell search method under multiple operators according to an embodiment of the present application;

fig. 21 is a schematic structural diagram of a cell search apparatus under multiple operators according to an embodiment of the present disclosure;

fig. 22 is a schematic structural diagram of an electronic device under multiple operators according to an embodiment of the present disclosure.

Detailed Description

In the following, some terms in the present application will be explained:

1) the UE may be a terminal, or a device located within the terminal (e.g., a chip within the terminal). A terminal, also referred to as a user equipment (ue), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice/data connectivity to a user. For example, a handheld device having a wireless connection function, or a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like.

2) A network device is a device in a wireless network, such as a Radio Access Network (RAN) node that accesses a terminal to the wireless network. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In one network configuration, a network device may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node.

3) The term "plurality" means two or more, and the other terms are similar. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Furthermore, for elements (elements) that appear in the singular form "a," an, "and" the, "they are not intended to mean" one or only one "unless the context clearly dictates otherwise, but rather" one or more than one. For example, "a device" means for one or more such devices. Still further, at least one (at least one of a). Determining Y from X does not mean determining Y from X alone, but can be determined from X and other information.

4) PLMN refers to a network established and operated by the government or its approved operator for the purpose of providing land mobile services to the public. The PLMNs of different operators are different and different network codes may be used to distinguish the PLMNs of different operators. For example, the network code of the PLMN of operator a is 46015, the network code of the PLMN of operator B is 46000, and the network code of the PLMN of operator C is 46001.

5) And the HPLMN is the PLMN of the operator to which the SIM card of the UE belongs. If the operator to which the SIM card of the UE belongs is operator a, the HPLMN of the UE is a PLMN of operator a. The UE may read the HPLMNAct from a card file corresponding to the SIM card issued by the operator. The HPLMNAct includes information of the HPLMN, such as the network code of the HPLMN, to determine its HPLMN. HPLMNAct may also include: a radio access technology corresponding to the HPLMN.

6) RPLMN refers to the PLMN on which the UE registered (as may be understood, successfully registered) prior to the last power-off or network-off. Such as: and the PLMN registered before the UE is powered off last time is the PLMN of the operator B, and the RPLMN of the UE is the PLMN of the operator B. The RPLMN and the HPLMN of the UE may be the same or different. Such as: the HPLMN of the UE is a PLMN of the operator a, and the PLMN registered before the UE was powered off last time is also a PLMN of the operator a, then the RPLMN of the UE is also a PLMN of the operator a, that is, the RPLMN of the UE is the same as the HPLMN.

Before the UE is powered off or disconnected from the network, the information of the PLMN registered by the UE, such as a network code, may be temporarily stored in the card file corresponding to the SIM card, so as to indicate that the PLMN corresponding to the information is the RPLMN of the UE. Under different systems, the UE can store the information of the PLMN registered before shutdown or offline in the loci file of the corresponding system in the SIM card so as to indicate the RPLMN of the UE under the corresponding system. And then, the UE can determine the RPLMN of the UE in the system according to the LOCI file of the corresponding system. For example, when the UE needs to determine the RPLMN in the first standard (e.g., the fifth generation mobile communication technology, 5G)), the UE may read the corresponding information from the 5G-LOCI of the card file of the SIM issued by the operator to determine the RPLMN in the first standard. Or, when the UE needs to determine the RPLMN in the second standard (e.g., the 4th generation mobile communication technology, 4G)), the UE may read the corresponding information from the card file eps-LOCI of the SIM issued by the operator to determine the RPLMN in the second standard.

7) A Forbidden PLMN (FPLMN) is a PLMN that is prohibited from access. Such as: the operator a and the operator C do not have co-established network equipment, and do not lease the network equipment of the operator C, and if the operator to which the SIM card of the UE belongs is the operator a, the FPLMN of the UE is the PLMN of the operator C. When the UE needs to determine the FPLMN, the UE may read the corresponding information from the corresponding card file of the SIM card issued by the operator to determine the FPLMN of the UE.

8) An Equivalent PLMN (EPLMN) is a PLMN that is co-located with the HPLMN of the UE. Such as: the operator to which the SIM card of the UE belongs is operator a, the HPLMN of the UE is PLMN of operator a, and the operator a rents network equipment of operator B, so the EPLMN of the UE is PLMN of operator B. The UE may read the corresponding information from the corresponding card file of the SIM card issued by the operator to determine the EPLMN of the UE.

Please refer to fig. 1, which is a schematic diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, in the communication system, a UE 110 communicates with other devices through a wireless network including a Radio Access Network (RAN) and a Core Network (CN). Where RAN is used to access UE 110 to the radio network and CN is used to manage UE 110 and provide a gateway for communication with the external network.

Take the wireless network as a 5G system (or referred to as a 5G NR system, or NR system) as an example. The wireless network may include a network device 120, and the network device 120, for example, a RAN device (e.g., a gNB), is responsible for data transmission over a wireless interface. The core network may include signaling plane network elements, such as an access and mobility management function (AMF) 140 and a Session Management Function (SMF) 150, which are responsible for building a data transmission channel. The SMF 150 is mainly responsible for session management, and the AMF 140 is mainly responsible for user management. The core network may also include a data plane network element, such as a User Plane Function (UPF) 160, which is mainly responsible for data forwarding.

At present, after the UE is powered on, cell search needs to be performed on the PLMN first, and the UE accesses the cell after searching for an available cell, and can initiate registration in the cell after successful access. Upon successful registration to a cell, the UE may enjoy network services in the cell. The UE generally performs cell search based on a cell search strategy. The cell search strategy mainly includes that cell search is performed under which PLMN first, and then cell search is performed under which PLMN. For example, when the network code of the RPLMN is stored in the card file of the SIM card of the UE, the cell search is first performed in the RPLMN. If no cell is searched under the RPLMN, the priority order of each PLMN searched currently is determined, and the searching is carried out in sequence. If the currently searched PLMN includes a local public land mobile network (Home PLMN, HPLMN, such as the network of operator B), and the priority of the HPLMN is the highest, the UE switches to continue the cell search under the HPLMN. Thereafter, if no cell is searched under the HPLMN, the UE continues to search under other PLMNs according to the priority order. This results in a long time taken for the UE to perform cell search.

In addition, the UE may be a multimode device supporting multiple systems, and therefore, the cell search policy may further include in which system the cell search is performed first, and then in which system the cell search is performed in one PLMN. If the UE supports the first system and the second system, the specifically performing cell search under one PLMN may include: the UE firstly carries out cell search in a first system under the PLMN. If the cell is not searched in the first system, the cell search is carried out in the second system. If the cell is not searched in the first system and the second system, the cell search is carried out in other PLMNs. This will undoubtedly increase the time taken for the UE to perform cell search.

In addition, one operator (or one PLMN) corresponds to one frequency band, each frequency band corresponds to a plurality of frequency points, and different frequency points can be understood as corresponding to different cells. In this embodiment, the cell search performed by the UE, for example, the cell search performed in the network type of a certain PLMN may specifically be: and the UE searches the frequency point in the frequency band corresponding to the PLMN under the network system of the PLMN. Therefore, the cell search strategy may further include searching, in one PLMN, the historical camping frequency point of each system first, and then searching the Full Band (Full Band) of each system. Such as: if the UE supports the first system and the second system, the cell search performed under one PLMN may specifically include: and the UE searches the historical resident frequency point in the first system under the PLMN. And if the historical residing frequency point under the first standard is not searched, then searching the historical residing frequency point under the second standard. And if the historical resident frequency point under the second system is not searched, searching the Full Band of the first system. And if any frequency point of the first system is not searched, searching the Full Band of the second system. This further increases the length of time it takes for the UE to perform cell search.

For example, as shown in fig. 2, based on the cell search policy, the UE supports the first standard and the second standard, and preferentially performs cell search in the high standard, where, for example, the first standard is higher than the second standard, the cell search procedure provided by the related art may specifically include:

after the UE is powered on or restarted or dropped, S11 is executed: the UE determines that the information of the RPLMN is stored. Such as information indicating that the RPLMN is PLMN-A.

Illustratively, the information of the RPLMN is stored in a card file of the SIM card, or the information of the RPLMN is stored in a memory of the UE, which is not limited herein.

S12, the UE searches the historical residing frequency point (for example, referred to as the historical residing frequency point 1) in the first mode of the RPLMN. And if the frequency point is searched under the historical resident frequency point 1 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to network device a.

And after the network equipment a receives the registration information from the UE, accessing the UE to the cell according to the registration information. After the UE successfully accesses the cell, network device a may provide network services for the UE. It should be noted that the network device a in this embodiment refers to a type of network device that is deployed by an operator and can provide a network standard as a first standard, and does not refer to a certain network device in particular. Such as: the UE determines that information of the RPLMN is stored, and the information is used for indicating that the RPLMN is PLMN-A.

It should be noted that the network device A in this embodiment may refer to A type of network device that is deployed by the PLMN for the operator A of the PLMN-A and is capable of providing the network standard as the first standard, rather than A specific network device. In addition, unless otherwise specified, explanations of other network devices (e.g., network device b, network device 1, network device 2, etc.) in this embodiment are similar to the explanations of network device a, and are not repeated. For example, the network device B may refer to a type of network device, which is deployed by the PLMN for the operator B of the PLMN-B and is capable of providing the network standard as the first standard, instead of the specific network device.

If the frequency point is not searched under the historical residing frequency point 1 of the RPLMN, S13 is executed.

In some embodiments, the historical camping frequency point may be frequency point information corresponding to a cell where the UE was last powered on, or restarted, or camped before the network is dropped; in still other embodiments, the historical camping frequency point may also be frequency point information corresponding to a cell where the terminal device has been camped historically.

And S13, the UE searches the historical residing frequency point (for example, referred to as the historical residing frequency point 2) of the second standard of the RPLMN. And if the frequency point is searched under the historical resident frequency point 2 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as: the UE sends registration information to network device b. Similarly, network device b may provide network services for the UE after the UE successfully registers with the cell.

Specifically, the description of the network device b is similar to that of the network device a, and is not repeated here.

If the frequency point is not searched under the historical residing frequency point 2 of the RPLMN, S14 is executed.

S14, the UE searches Full Band (called as Full Band1) of the first standard under RPLMN.

And if the frequency point is searched under Full Band1 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to network device a. Similarly, network device a may provide network services for the UE after the UE successfully registers with the cell. If no frequency point is searched under the Full Band1 of the RPLMN, then the Full Band (such as Full Band2) of the second standard of the RPLMN is searched. And if the frequency point is searched under Full Band2 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to network device b. Similarly, network device b may provide network services for the UE after the UE successfully registers with the cell.

If no frequency point is searched under Full Band2 of RPLMN, then the currently searched PLMNs are sorted according to the pre-configured PLMN priority search order to determine the priority order of each currently searched PLMN, and the searching is performed under each PLMN in turn according to the priority order. Such as: and determining that the PLMN-B is the PLMN with the highest priority in the currently searched PLMNs, and switching to the PLMN-B for searching. And if the frequency point is not searched in the historical resident frequency point of the PLMN-B and the frequency point is not searched in the Full Band of the PLMN-B, continuing to search the rest PLMNs according to the priority order. If no frequency point is searched in the historical resident frequency points Of all the remaining PLMNs and no frequency point is searched in the Full Band Of each remaining PLMN, the method enters Out Of Synchronization (OOS).

It should be noted that the process of searching by the UE under the PLMN (e.g., HPLMN, RPLMN, or other PLMN) is similar to the process of searching by the UE under the RPLMN (S12-S14). If the HPLMN is determined to be PLMN-B, the UE firstly carries out historical residing frequency point (such as historical residing frequency point 3) under the first mode of the UE to the PLMN-B. And if the frequency point is determined not to be searched under the historical residing frequency point 3 of the PLMN-B, the UE searches the historical residing frequency point (such as the historical residing frequency point 4) of the second system of the PLMN-B. And determining that the frequency point is not searched under the historical residing frequency point 4 of the PLMN-B, and searching the Full Band (such as called Full Band1) of the first standard under the PLMN-B by the UE. And if the UE determines that the frequency point is not searched under the Full Band1 of the PLMN-B, the UE searches the Full Band (such as called Full Band2) of the second standard under the PLMN-B. And when the frequency point is determined not to be searched under the Full Band2 of the PLMN-B, switching to other PLMNs for searching.

As shown in fig. 3, for one UE, the accessible cells can be divided into 3 types, which are: home cell, co-established cell, other cells. The home cell may refer to a cell of a network device deployed by an operator to which a SIM card of the UE belongs. The co-established cell may refer to a cell of a network device co-deployed with other operators by an operator to which a SIM card of the UE belongs. The remaining cells are other cells. Take the SIM card of the UE belonging to operator a as an example. As shown in fig. 3, operator a deploys a cell of a network device, such as home cell 101 shown in fig. 3. A cell of a network device that operator a and operator B have in common, such as a co-established cell 103 shown in fig. 3. The remaining cells are other cells, such as other cells 102 shown in fig. 3. Other cells 102 may include cells of network equipment deployed by other operators, such as operator C, and may also include cells of network equipment deployed independently by operator B.

Referring to fig. 3, if the UE moves in the accessible cell and is powered on and powered off during the moving process, a plurality of scenarios may be formed due to the difference between the cells where the UE is powered off and powered on. And in each scenario, the UE performs cell search according to the procedure shown in fig. 1.

These various scenarios are described below in connection with examples.

In the following example, the SIM card of the UE belongs to an operator A (e.g., chinA broadcast and television network limited, abbreviated as radio and television), the PLMN of the radio and television is PLMN-A (e.g., 46015), and the home cell 101 is A cell in which network equipment is independently deployed by the radio and television, that is, the home cell 101 is A home cell of the UE. The other cells 102 are cells where network devices are independently deployed by an operator B (e.g., china mobile communication group, ltd, mobile), and the mobile PLMN is a PLMN-B (e.g., 46000), that is, the other cells 102 are other cells of the UE. The co-established cell 103 is a cell of network equipment deployed jointly by radio, television and mobile, that is, the co-established cell 103 is a co-established cell of the UE. Wherein, the network provided by the network equipment deployed together by broadcasting and television and mobile is called as a co-building network.

The network system of the network equipment jointly deployed by radio and mobile is the first system. And the network system of the network equipment belonging to the radio and television independent department is a second system. The radio and television rents network equipment which is independently deployed in a mobile mode, the network mode of the network equipment is a second mode, and the network equipment allows the UE to be accessed in a roaming mode. The network device to which the radio and television department belongs does not have any other standard except for the first standard and the second standard, the first standard is higher than the second standard, the first standard is 5G, the second standard is 4G, and the multiple scenes may include the following scenes 1 to 5.

In scenario 1, with reference to fig. 3, as shown in fig. 4, the UE is powered off after normally accessing the co-established cell 103, and is powered on after moving to another cell 102. In scenario 1, the co-established cell 103 is a first cell in this embodiment, and the other cells 102 are second cells in this embodiment.

In scenario 2, with reference to fig. 3, as shown in fig. 5, the UE is powered off after normally accessing the home cell 101, and is powered on after moving to another cell 102. In this scenario 2, the home cell 101 is a first cell in this embodiment, and the other cells 102 are second cells in this embodiment.

In scenario 3, with reference to fig. 3, as shown in fig. 6, the UE is powered off after normally accessing other cells 102, and is powered on after moving to a co-established cell 103. In scenario 3, the other cell 102 is a first cell in this embodiment, and the co-established cell 103 is a second cell in this embodiment.

In scenario 4, with reference to fig. 3, as shown in fig. 7, the UE is powered off after normally accessing another cell 102, and is powered on after moving to the home cell 101. In scenario 4, the other cell 102 is a first cell in this embodiment, and the home cell 101 is a second cell in this embodiment.

In scenario 5, with reference to fig. 3, as shown in fig. 8, after the UE normally accesses the other cell 102, the UE is powered off and is powered back on in the other cell 102.

The embodiment of the application provides a cell search method, which can solve the problem that the time for the UE to search the cell under the scenes 1-5 is long.

Fig. 9 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to search the cell under the scenes 1, 2, 3 and4 is long. As shown in fig. 9, the method may include:

s901, the UE determines that the HPLMN is the predefined PLMN.

The areas or countries corresponding to the predefined PLMNs have co-established networks, and the network equipment providing the co-established networks corresponds to the PLMNs. Such as: in China, broadcasting and television and mobile are deployed with network equipment with a network standard of 5G together, and the network equipment is used for providing a co-building network. The UE may resolve from a broadcast message (e.g., main system information block (MIB) signaling) of the network device to 46000 PLMNs and 46015. When the operator to which the SIM card used by the UE belongs is radio and television and moves into the coverage of the network device, although the UE can search for the 46000 PLMN network and 46015 network at the same time, since the UE belongs to the photoelectric UE, the UE needs to search for 46015 to join the network provided by the photoelectric network in the network device.

Specifically, the preset condition includes a scenario in which the UE needs to search for the RPLMN, such as the UE is turned on or the UE performs cell reselection.

Exemplarily, in the embodiment of the present application, after the UE is powered on, the location information of the UE needs to be determined. For example, the UE may obtain any PLMN (e.g. 46015) by means of Emergency Camp On (Emergency Camp On), and determine the country where the UE is located according to a Mobile Country Code (MCC) in the PLMN, e.g. the MCC in 46015 is 460, which indicates that the country where the UE is located is china (china). In addition, the UE may also determine the current country according to the current coordinates by obtaining the current coordinates. (for example, if each country corresponds to a coordinate set, and the coordinate is determined to be in the coordinate set, the country where the UE is located may be determined to be the country corresponding to the coordinate set). For example, the UE may obtain the current coordinates through any Positioning System, where the Positioning System at least includes a Global Positioning System (GPS) and a BeiDou Navigation Satellite System (BDS).

And when the current country is determined to be the predefined country, performing ordinary roaming network searching. Upon determining that the current country is a predefined country, the UE may determine whether the HPLMN of the UE is 46015. If it is determined that the HPLMN is 46015, S11 is performed. When the UE determines that the HPLMN of the UE is 46000, cell search may be performed according to the procedure shown in fig. 2.

And S11, the UE determines that the information of the RPLMN is stored.

As described in the previous embodiments, the RPLMN refers to a PLMN registered by the UE before the last power-off or network disconnection. In scenarios 1-4 corresponding to fig. 4-7, the PLMN registered before the UE is powered off or disconnected is the PLMN of the cell to which the UE has last accessed, and the UE moves, and the cell to which the UE moves and the cell to which the UE has last accessed belong to different operators, so that the PLMN corresponding to the information of the RPLMN stored by the UE is different from the PLMN of the operator to which the cell to which the UE currently belongs. At this time, when the UE determines to store the information of the RPLMN as specified in 4.4.3.1 in 23.122 in the third Generation Partnership Project (3 GPP), the UE needs to search the historical camping frequency point of each standard supported by the UE of the RPLMN; however, at this time, the UE searches at the historical camping frequency point of each standard supported by the UE of the RPLMN, and cannot search the cell under the RPLMN; or, if the UE searches from the RPLMN corresponding to the highest standard (e.g. 5G), the cell under the RPLMN cannot be searched; or, the UE searches from the RPLMN corresponding to the last registered network type (e.g. 4G), and cannot search for the cell under the RPLMN. Therefore, in the embodiment of the present application, in the scenarios 1 to 4, after determining that the HPLMN is the predefined PLMN and the card file of the SIM card stores the information of the RPLMN, the UE directly executes the following steps S902 to S904. That is, the UE does not need to search under the RPLMN (e.g., does not need to perform S12-S14 shown in fig. 2), thereby saving the time duration of cell search occupied by searching under the RPLMN.

For example, taking the first cell as the co-established cell 103 and the second cell as the other cell 102 as an example, in conjunction with scenario 1 shown in fig. 3 and4, if the operator to which the SIM card used by the UE belongs is radio, the HPLMN stored by the UE is 46015. Since the co-established cell 103 is a network device of a network standard 5G deployed by radio, television and mobile, when the UE is in the co-established cell 103, the broadcast message (such as MIB signaling) acquired from the network device is analyzed to PLMN of 46000 and PLMN of 46015. Since the co-deployed network devices do not support roaming access, at this time, when the UE requests to access the co-established cell 103, it needs to search 46015, so that when the frequency point is searched under the 46015, the registration information can be sent to the network device corresponding to the co-established cell 103 through the frequency point. When the UE is powered off after successfully residing in the co-established cell 103 and is moved to other cells 102 to be powered on, the UE determines that the stored RPLMN information is 46015, and the other cells 102 are cells corresponding to network devices with a mobile independently deployed network standard of 4G. At this time, when the UE is powered on in another cell 102, the UE determines that the RPLMN is stored (46015), so the UE needs to search the historical camping frequency point of each standard of 46015 in the other cell 102, or search the Full Band of each standard of 46015. Since the PLMN of the corresponding network device in the other cell 102 is 46000, that is, only the frequency point (e.g., frequency point B) of 4G with the PLMN 46000 is provided in the other cell 102, the UE cannot search the frequency point (e.g., frequency point a) in the historical camping frequency point of any standard of 46015, and cannot search the frequency point (e.g., frequency point a) in the Full Band of any standard of 46015.

It should be noted that, in scenario 2, scenario 3, and scenario 4 shown in fig. 5 to fig. 7, when the UE determines that the RPLMN information is stored, the process that the UE skips searching for the RPLMN and directly searches for the HPLMN is similar to the process in scenario 1 described above, and details are not repeated here.

S902, the UE searches the historical residing frequency point (for example, the historical residing frequency point 5) in the first standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 5 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

If no frequency point is searched under the historical residing frequency point 5 of the RPLMN, S903 is executed.

S903, the UE searches the historical residing frequency point (such as the historical residing frequency point 6) of the second standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 6 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as: the UE sends registration information to the network device 1.

If no frequency point is searched under the HPLMN historical camping frequency point 6, S904 is executed.

S904, the UE searches for Full Band (for example, called Full Band5) of the first standard under the HPLMN. And if the frequency point is searched under Full Band5 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3. If no frequency point is searched under Full Band5 of the HPLMN, the UE searches for Full Band (for example, called Full Band6) of the second standard of the HPLMN. And if the frequency point is searched under Full Band6 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 1. If no frequency bin is searched under Full Band6 of the HPLMN, S15 is executed.

It should be noted that the implementation manner of S902-S904 is similar to the corresponding implementation process in S12-S14, and is not described herein again.

If no frequency point is searched under Full Band6 of the HPLMN, the UE will sort the currently searched PLMNs according to a preconfigured PLMN priority search order to determine a priority order of each currently searched PLMN, and sequentially search under each PLMN according to the priority order, for example, if PLMN-B is the highest priority PLMN among the currently searched PLMNs, no frequency point is searched under Full Band6 of the HPLMN, and the UE switches to PLMN-B to perform a search, that is, perform S15-S17 shown in fig. 2.

If no frequency point is searched in Full Band6 of PLMN-B, the UE continues to search for the remaining PLMNs according to the priority order determined in S904. And when determining that no frequency point is searched in the historical resident frequency points of the rest PLMN and no frequency point is searched in the Full Band6 of the rest PLMN, the UE enters OOS.

In the above example, when performing cell search on one PLMN, the UE first performs search on the historical camping frequency of each system of the PLMN. And when the frequency point is not searched under the historical resident frequency point of each system of the PLMN, the UE searches under the Full Band of each system of the PLMN. The following description is given by taking an example in which when no frequency point is searched under Full Band of each system of the PLMN, the PLMN is switched to the searched PLMN for searching. Since the UE searches in Full Band of each system of the PLMN, the process may occupy a large amount of time for cell search. Therefore, in some other embodiments of the present application, when the UE performs cell search, the UE first performs search on the historical camping frequency point of each system of each PLMN. When the frequency point is not searched under the historical resident frequency point of each system of each PLMN, the UE searches under the Full Band of each system of each PLMN, so that the time length of the UE for searching the cell can be shortened.

For example, with reference to fig. 9, after the UE performs S901-S903 shown in fig. 9 in the foregoing embodiment, if it is determined that no frequency point is searched under the historical camping frequency point 6 of the HPLMN, then S15 and S16 shown in fig. 2 in the foregoing embodiment are performed. Therefore, after the UE performs S904 shown in fig. 9 in the foregoing embodiment and determines that no frequency bin is searched under Full Band6 of the HPLMN, S15 and S16 shown in fig. 2 in the foregoing embodiment are performed, and the process of searching in Full Band of each system of the HPLMN that occupies a large amount of time duration of cell search may be skipped, so as to shorten the time duration of switching PLMNs when the UE performs cell search. When no frequency point is searched under the historical camping frequency point of the PLMN-B, the foregoing embodiment is executed as S904 shown in fig. 9, and when no frequency point is searched under Full Band6 of the HPLMN, the foregoing embodiment is executed as S17 shown in fig. 2, so that the time length for the UE to perform cell search can be shortened.

By adopting the technical scheme, in the prior art, when the UE is in any one of the scene 1, the scene 2, the scene 3 and the scene 4, the cell under the RPLMN cannot be searched when the UE searches under the RPLMN. Therefore, the cell search method provided by the embodiment of the application determines that the HPLMN is the predefined PLMN, and directly searches under the HPLMN when determining that the card file of the SIM card stores the RPLMN information, so that the cell search time occupied by searching under the RPLMN is saved, and further the total time occupied by the UE for cell search can be shortened.

Fig. 10 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to search the cell under the scenes 1, 2, 3 and4 is long. As shown in fig. 10, the method may include:

s1001, the UE determines that the HPLMN is the predefined PLMN.

S1002, the UE adds the EPLMN in the second mode.

And S11, the UE determines that the information of the RPLMN is stored.

S12, the UE searches the historical residing frequency point (for example, referred to as the historical residing frequency point 1) in the first mode of the RPLMN. And if the frequency point is searched under the historical resident frequency point 1 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3. And if the frequency point is not searched under the historical residing frequency point 1 of the RPLMN, executing S1003.

S1003, the UE searches the historical residing frequency point (for example, referred to as historical residing frequency point 2) of the second standard of the RPLMN. And if the frequency point is searched under the historical resident frequency point 2 of the RPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Or, if the frequency point is searched under the historical residing frequency point 2 of the EPLMN, the UE sends the registration information to the network device of the cell corresponding to the frequency point. Such as: the UE sends registration information to the network device 1.

Wherein, as described in the previous embodiments, the EPLMN is a PLMN that is co-located with the HPLMN of the UE. In the scenario 1-scenario 4 corresponding to fig. 4-7, when the UE searches in one PLMN, even if a frequency point in the historical residing frequency point of the EPLMN is searched, the UE cannot immediately initiate registration with the network device, but determines that no frequency point is searched in the historical residing frequency point of any system of the PLMN, and performs the search after switching to the EPLMN, and when a frequency point in the historical residing frequency point of the EPLMN is searched again, the UE may initiate registration with the network device at this time. Therefore, the cell search method provided in the embodiment of the present application adds the EPLMN of the second standard, such as: when the UE searches under the RPLMN, the UE searches the frequency point in the historical residing frequency point of the EPLMN, the UE can immediately initiate registration to the network equipment, and the UE does not need to initiate registration to the network equipment when the UE needs to determine that the frequency point is not searched in the historical residing frequency point of any standard of the RPLMN and switches to the EPLMN and then searches the frequency point in the historical residing frequency point of the EPLMN again, so that the time length of cell search occupied by the RPLMN can be shortened. If no frequency point is searched under the historical residing frequency point 2 of the RPLMN and no frequency point is searched under the historical residing frequency point 2 of the EPLMN, S1004 is executed.

For example, taking the first cell as the home cell 101 and the second cell as the other cell 102 as an example, in conjunction with scenario 2 shown in fig. 3 and5, if the operator to which the SIM card used by the UE belongs is radio, the HPLMN stored by the UE is 46015. And because the network equipment with the network standard of 5G is jointly deployed by the radio and the mobile, and the radio rents the network equipment with the network standard of 4G, the users of the radio and the television can access the network equipment which is independently deployed by the mobile in a roaming way within the coverage range of the network equipment which is not deployed by the radio and the television. Therefore, in the embodiment of the present application, 46000, which determines movement, is EPLMN of 46015 at 4G. Since the home cell 101 is a network device with a network standard of 4G, which is independently deployed by radio and television, when the UE is in the home cell 101, the PLMN of 46015 is resolved from a broadcast message (such as MIB signaling) acquired by the network device. At this time, when the UE requests to access the home cell 101, it needs to search 46015, so that when the frequency point is searched under 46015, the UE can send registration information to the network device corresponding to the home cell 101 through the frequency point. When the UE is powered off after successfully residing in the home cell 101 and is moved to another cell 102 to be powered on, the RPLMN information stored by the UE is 46015, and the other cell 102 moves a cell corresponding to a network device with a network standard of 4G that is independently deployed. The UE determines that RPLMN is kept (46015), so the UE needs to search for historical camping frequency points of 46015 per standard in other cells 102, or to search for Full Band of 46015 per standard. Since the PLMN of the network device corresponding to the other cell 102 is 46000, that is, only the frequency point (e.g., frequency point B) of 4G with the PLMN 46000 is provided in the other cell 102, the UE cannot search the frequency point (e.g., frequency point a) in the history camping frequency point of any one of the 46015, even if the frequency point (e.g., frequency point B) of 4G of 46000 is searched. The UE cannot immediately initiate registration with the network device. Or, the UE cannot search for a frequency point (e.g., frequency point a) in Full Band of any of 46015 systems, even if it searches for a 46000 frequency point of 4G (e.g., frequency point B). The UE cannot immediately initiate registration with the network device. Instead, after determining that a frequency point (such as frequency point a) is searched in a historical camping frequency point of any standard of 46015 and determining that a frequency point (such as frequency point a) cannot be searched in Full Band of any standard of 46015, the UE searches 46000. When the frequency point is searched in the 46000 4G historical residing frequency point, the registration message can be sent to the network equipment corresponding to the frequency point.

It should be noted that, in the scenarios 1, 3, and4 shown in fig. 4, 6, and7, when the UE determines that the RPLMN information is stored, the process that the UE searches at the historical camping frequency point of any PLMN, and the process that the UE searches at the Full Band of any PLMN is similar to the process of the UE in the scenario 2, and is not described again here.

S1004, the UE searches for Full Band (for example, called Full Band1) of the first standard under RPLMN.

And if the frequency point is searched under Full Band1 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3. Such as the UE sending registration information to the network device 3.

If no frequency point is searched under the Full Band1 of the RPLMN, then the Full Band (such as Full Band2) of the second standard of the RPLMN is searched. And if the frequency point is searched under Full Band2 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2. Or, if the frequency point is searched under Full Band2 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 1. If no frequency point is searched under Full Band2 of the RPLMN and no frequency point is searched under Full Band2 of the EPLMN, S15 is performed.

If no frequency point is searched under Full Band2 of the RPLMN and no frequency point is searched under Full Band2 of the EPLMN, the UE sequentially searches according to the priority sequence of each currently searched PLMN, if the PLMN-B is determined to be the PLMN with the highest priority in the currently searched PLMNs, the UE does not search the frequency point under Full Band2 of the RPLMN and switches to the PLMN-B for searching, namely executing S15 in fig. 2.

S15, the UE searches the historical residing frequency point (such as the historical residing frequency point 3) of the first system of the PLMN-B. And if the frequency point is searched under the historical resident frequency point 3 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

If no frequency point is searched under the historical residing frequency point 3 of the PLMN-B, S1005 is executed.

It should be noted that the RPLMN stored in the card file of the SIM card in S11 is different from that in PLMN-B.

S1005, the UE searches the historical residing frequency point (for example, the historical residing frequency point 4) of the second system of the PLMN-B. And if the frequency point is searched in the historical resident frequency point 4 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Or if the frequency point is searched under the historical residing frequency point 4 of the EPLMN, the registration information is sent to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2.

If no frequency point is searched in the historical residing frequency point 4 of the PLMN-B and no frequency point is searched under the historical residing frequency point 4 of the EPLMN, S1006 is executed.

S1006, the UE searches for Full Band (for example, called Full Band3) of the first standard of the PLMN-B.

And if the frequency point is searched in the Full Band3 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

If no frequency point is searched in the Full Band3 of the PLMN-B, then the Full Band of the second standard of the PLMN-B (such as called Full Band4) is searched.

And if the frequency point is searched in the Full Band4 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2. Or, if the frequency point is searched under Full Band4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2.

If no frequency point is searched under Full Band4 of PLMN-B and no frequency point is searched under Full Band4 of EPLMN, then the remaining PLMNs are searched continuously according to the priority order determined by the above S1004. And determining that no frequency point is searched in the historical resident frequency points of the rest PLMN, and entering OOS when no frequency point is searched in the Full Band of the rest PLMN.

In the above example, when a PLMN is subjected to cell search, even if a frequency point in the historical camping frequency point of the EPLMN is searched, the UE cannot immediately initiate registration with the network device, but when it is determined that no frequency point is searched in the historical camping frequency point of any system of the PLMN, the UE searches under Full Band of each system of the PLMN again. The following description is given by taking an example in which when no frequency point is searched under Full Band of each system of the PLMN, the PLMN is switched to the searched PLMN for searching. When the UE searches for the Full Band of each system of the PLMN, the process may occupy a large amount of time for cell search, and when the UE searches for the frequency point in the historical residing frequency point of the EPLMN in one PLMN, the UE cannot immediately initiate registration with the network device even if the frequency point in the historical residing frequency point of the EPLMN is searched. Thus, in some other embodiments of the present application, the data is obtained by adding the EPLMN of the second format, such as: when the UE searches under one PLMN, the UE firstly searches under the historical resident frequency point of each system of each PLMN. If the frequency point in the historical resident frequency point of the second standard of the EPLMN is searched, the UE can immediately initiate registration to the network equipment. And if the frequency point is not searched under the historical resident frequency point of each system of each PLMN, the UE searches under the Full Band of each system of each PLMN. And when the frequency point is not searched under the Full Band of each system of each PLMN, switching to the searched PLMN for searching, thereby shortening the time length for the UE to search the cell.

For example, with reference to fig. 10, after performing S1001-S1003 shown in fig. 10 in the foregoing embodiment, the UE determines that no frequency point is searched under the historical camping frequency point 2 of the RPLMN, and no frequency point is searched under the historical camping frequency point 2 of the EPLMN, then performs S15 shown in fig. 2 in the foregoing embodiment and performs S1005 shown in fig. 10 in the foregoing embodiment. Thus, the UE does not need to perform S15 shown in fig. 2 in the foregoing embodiment and perform S1005 shown in fig. 10 in the foregoing embodiment after performing S1004 shown in fig. 10 in the foregoing embodiment and determining that no frequency point is searched under Full Band2 of RPLMN and no frequency point is searched under Full Band2 of EPLMN. Therefore, the process of searching in Full Band of each system of PLMN, which occupies a large amount of cell search time, can be skipped, and the time for switching PLMN when UE performs cell search is shortened. When no frequency point is searched in the historical residing frequency point 4 of the PLMN-B and no frequency point is searched under the historical residing frequency point 4 of the EPLMN, S1004 shown in fig. 10 in the foregoing embodiment and S17 shown in fig. 2 in the foregoing embodiment are executed, so that the time length for the UE to perform cell search can be shortened.

By adopting the technical scheme, in the prior art, when the UE is in any one of the scene 1, the scene 2, the scene 3 and the scene 4, because the UE searches under one PLMN, even if the frequency point in the historical residing frequency point of the EPLMN is searched, the UE cannot immediately initiate registration to the network device, that is, the UE must determine that the frequency point is not searched in the historical residing frequency point of any system of the PLMN, and switch to the EPLMN, and then, when the frequency point in the historical residing frequency point of the EPLMN is searched again, the UE can initiate registration to the network device at this moment. Therefore, according to the cell search method provided in the embodiment of the application, by adding the EPLMN of the second standard, if the frequency point in the history resident frequency point of the EPLMN is searched when the UE searches the history resident frequency point of the RPLMN of the second standard, the UE immediately initiates registration to the network device, and the UE does not need to initiate registration to the network device when determining that the frequency point is not searched in the history resident frequency point of any standard of the RPLMN and after switching to the EPLMN, when the frequency point in the history resident frequency point of the EPLMN is searched again, so that the cell search time occupied by switching the PLMN can be saved.

Fig. 11 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to search the cell under the scenes 1, 2, 3 and4 is long. As shown in fig. 10, the method may include:

s1101, the UE determines that the HPLMN is the predefined PLMN.

S1102, the UE increases the EPLMN in the second mode.

And S11, the UE determines that the information of the RPLMN is stored.

It should be noted that a specific implementation that the UE does not need to perform the search under the RPLMN is similar to the specific implementation that the UE does not need to perform the search under the RPLMN in the foregoing embodiment fig. 9, and details are not described here again.

S1103, the UE searches the historical residing frequency point (for example, referred to as historical residing frequency point 5) in the first standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 5 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

If no frequency point is searched under the HPLMN historical dwell frequency point 5, S1104 is executed.

S1104, the UE searches the historical residing frequency point (for example, referred to as historical residing frequency point 6) of the second standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 6 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point.

Or, when the frequency point is searched under the historical residing frequency point 6 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. Such as: the UE sends registration information to the network device 1.

Wherein, as described in the previous embodiments, the EPLMN is a PLMN that is co-located with the HPLMN of the UE. In the scenario 1-scenario 4 corresponding to fig. 4-7, when the UE searches in one PLMN, even if a frequency point in the historical residing frequency point of the EPLMN is searched, the UE cannot immediately initiate registration with the network device, but determines that no frequency point is searched in the historical residing frequency point of any system of the PLMN, and performs the search after switching to the EPLMN, and when a frequency point in the historical residing frequency point of the EPLMN is searched again, the UE may initiate registration with the network device at this time. Therefore, the cell search method provided in the embodiment of the present application adds the EPLMN of the second standard, such as: when the UE searches under the HPLMN, the UE searches the frequency point in the historical resident frequency point of the EPLMN, the UE can immediately initiate registration to the network equipment, and the UE does not need to initiate registration to the network equipment when the UE needs to determine that the frequency point is not searched in the historical resident frequency point of any standard of the HPLMN and switches to the EPLMN and then searches the frequency point in the historical resident frequency point of the EPLMN again, so that the time length of cell search occupied by searching in the HPLMN can be shortened. If no frequency point is searched under the historical residing frequency point 2 of the HPLMN and no frequency point is searched under the historical residing frequency point 2 of the EPLMN, S1104 is executed.

For example, taking the first cell as the other cell 102 and the second cell as the home cell 101, in conjunction with scenario 4 shown in fig. 3 and7, if the operator to which the SIM card used by the UE belongs is radio, then the HPLMN stored by the UE is 46015. Due to the fact that the network equipment with the 5G network standard is jointly deployed by the radio and the mobile, and the network equipment with the 4G network standard is rented by the radio and the mobile, the users of the radio and the television can be in the coverage range of the network equipment which is not deployed by the radio and the television, and the users of the radio and the television can be accessed to the network equipment which is independently deployed by the mobile in a roaming mode when the users of the radio and the television are in the coverage range of the network equipment which is independently deployed by the mobile. At this time, when the UE is in another cell 102, the PLMN with 46000 is analyzed from the broadcast message (e.g., MIB signaling) acquired by the network device, and 46000 needs to be searched, so that when a frequency point is searched under 46000, the frequency point can be accessed in a roaming manner to send registration information to the network device corresponding to the other cell 102. When the UE is powered off after successfully camping in another cell 102 and moves to the home cell 101, the UE will resolve to the PLMN of 46015 from the broadcast message (e.g., MIB signaling) acquired by the network device. At this time, the UE determines that the RPLMN (46000) is stored, so that the UE needs to search for a historical camping frequency point of each system of 46000 in the home cell 101, or search for a Full Band of each system of 46000, even if a frequency point of 4G of 46015 (such as frequency point a) is searched in any stage (the UE cannot immediately register to the network device), a frequency point is not searched in the historical camping frequency point of any system of 46000, and when a frequency point is not searched in the historical camping frequency point of the Full Band of any system of 46000, the UE searches for 46000 at this time, and when a frequency point is searched in the historical camping frequency point of 4G of 46000, the UE may send registration information to the network device corresponding to the frequency point at this time.

It should be noted that, in scenario 1, scenario 2, and scenario 3 shown in fig. 4, fig. 5, and fig. 6, when the UE determines that the RPLMN information is stored, a process of the UE performing a search at any PLMN persistent frequency point is similar to the process of the UE in scenario 4, and is not described here again.

If no frequency point is searched under the historical residing frequency point 6 of the HPLMN and no frequency point is searched under the historical residing frequency point 6 of the EPLMN, S1105 is executed.

S1105, the UE searches for Full Band (for example, called Full Band5) of the first standard under the HPLMN. And if the frequency point is searched under Full Band5 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3. If no frequency point is searched under Full Band5 of the HPLMN, the UE searches for Full Band (for example, called Full Band6) of the second standard of the HPLMN. And if the frequency point is searched under Full Band6 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2. Or, the UE sends registration information to the network device of the cell corresponding to the frequency point when the frequency point is searched under Full Band6 of the EPLMN. Such as the UE sending registration information to the network device 2. If no frequency point is searched under Full Band6 of HPLMN and no frequency point is searched under Full Band6 of EPLMN, S15 is performed.

It should be noted that the implementation manner of S1103 to S1105 is similar to the corresponding implementation process in S12 to S14, and is not described herein again.

If no frequency point is searched under Full Band6 of the HPLMN, the UE may sort the currently searched PLMNs according to a preconfigured PLMN priority search order to determine a priority order of each currently searched PLMN, and sequentially search under each PLMN according to the priority order, for example, if PLMN-B is the highest priority PLMN among the currently searched PLMNs, no frequency point is searched under Full Band6 of the HPLMN, and the UE switches to PLMN-B to perform the search, that is, S15 shown in fig. 2 is performed.

If no frequency point is searched under the historical residing frequency point 3 of the PLMN-B, S1106 is executed.

S1106, the UE searches the historical residing frequency point (such as the historical residing frequency point 4) of the second system of the PLMN-B. And if the frequency point is searched in the historical resident frequency point 4 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Or if the frequency point is searched under the historical residing frequency point 4 of the EPLMN, the registration information is sent to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2.

If no frequency point is searched in the historical residing frequency point 4 of the PLMN-B and no frequency point is searched under the historical residing frequency point 4 of the EPLMN, S1107 is executed.

S1107, the UE searches for Full Band (for example, called Full Band3) of the first standard of PLMN-B.

If no frequency point is searched under Full Band4 of PLMN-B and no frequency point is searched under Full Band4 of EPLMN, then the remaining PLMNs are searched continuously according to the priority order determined by the above S1105. And determining that no frequency point is searched in the historical resident frequency points of the rest PLMN, and entering OOS when no frequency point is searched in the Full Band of the rest PLMN.

For example, with reference to fig. 11, after performing S1101-S1104 shown in fig. 11 in the foregoing embodiment, the UE determines that no frequency point is searched under the historical residing frequency point 6 of the HPLMN, and no frequency point is searched under the historical residing frequency point 6 of the EPLMN, then performs S15 shown in fig. 2 in the foregoing embodiment and performs S1106 shown in fig. 11 in the foregoing embodiment. Therefore, after performing S1105 shown in fig. 11 in the foregoing embodiment, the UE does not need to determine that no frequency point is searched under Full Band6 of the HPLMN, and no frequency point is searched under Full Band6 of the EPLMN, and then performs S15 shown in fig. 2 in the foregoing embodiment and S1106 shown in fig. 11 in the foregoing embodiment, so that the process of searching through Full bands of each system of the PLMN, which occupies a large amount of time for cell search, can be skipped, and the time for switching the PLMN when the UE performs cell search is shortened. When no frequency point is searched in the frequency point 4 of the PLMN-B in the history residence and no frequency point is searched under the frequency point 4 of the EPLMN in the history residence, S1005 shown in fig. 11 in the foregoing embodiment and S17 shown in fig. 2 in the foregoing embodiment are executed, so that the time length for the UE to perform cell search can be shortened.

By adopting the technical scheme, in the prior art, when the UE is in any one of the scenes 1, 2, 3 and4, the UE cannot search the cell under the RPLMN when searching under the RPLMN, and because the UE searches the frequency point in the historical residing frequency point of the EPLMN when searching under one PLMN, the UE cannot immediately initiate registration with the network device, that is, the UE must determine that the frequency point is not searched in the historical residing frequency point of any system of the PLMN, and switch to the EPLMN, and then search the frequency point in the historical residing frequency point of the EPLMN again, and then initiate registration with the network device. Therefore, according to the cell search method provided by the embodiment of the application, when the UE determines that the HPLMN is the predefined PLMN and determines that the card file of the SIM card stores the RPLMN information, the cell search is directly performed under the HPLMN, so that the time length of cell search occupied by performing search under the RPLMN is saved. Further, by adding the EPLMN of the second system, if the UE searches the historical residing frequency point of the second system of the HPLMN, if the frequency point in the historical residing frequency point of the EPLMN is searched, the UE immediately initiates registration to the network device, and the UE does not need to initiate registration to the network device when determining that the frequency point is not searched in the historical residing frequency point of any system of the HPLMN and after switching to the EPLMN, when searching the frequency point in the historical residing frequency point of the EPLMN again, thereby saving the time for cell search occupied by switching the PLMN.

Fig. 12 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to search the cell under the scenes 1, 2, 3 and4 is long. As shown in fig. 12, the method may include:

s1201, the UE determines that the HPLMN is the predefined PLMN.

S1202, the UE determines that the information of the RPLMN is not stored.

As described in the previous embodiments, the RPLMN refers to a PLMN registered by the UE before the last power-off or network disconnection. In the scenarios 1-4 corresponding to fig. 4-7, the PLMN registered before the UE is powered off or disconnected is the PLMN of the cell to which the UE has last accessed. Because the RPLMN is stored in the card file of the SIM card, when the UE is abnormal, the RPLMN may not be stored in the card file of the SIM card, and the information of the RPLMN is determined not to be stored after the UE is powered on again.

S1203, the UE searches a historical residing frequency point (for example, referred to as a historical residing frequency point 5) in the first system of the HPLMN. And if the frequency point is searched under the historical resident frequency point 5 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

And if the frequency point is not searched under the historical residing frequency point 5 of the RPLMN, executing S1204.

S1204, the UE searches the historical residing frequency point (for example, referred to as historical residing frequency point 6) of the second standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 6 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as: the UE sends registration information to the network device 1. If the frequency point is not searched under the historical residing frequency point 6 of the HPLMN, executing S15 and S16.

In scenarios 1-4 corresponding to fig. 4-7, when the UE searches in the Full Band of each system of a PLMN, the process may occupy a large amount of time for cell search. Therefore, in the embodiment of the present application, in the scenarios 1 to 4, when the UE performs cell search, the UE first performs search on the historical camping frequency point of each system of each PLMN. And when the frequency point is not searched under the historical resident frequency point of each system of each PLMN, the UE searches under the Full Band of each system of each PLMN. And when the frequency point is not searched under the Full Band of each system of each PLMN, switching to the searched PLMN for searching, thereby shortening the time length for the UE to search the cell.

For example, taking the first cell as the co-established cell 103 and the second cell as the other cell 102 as an example, in conjunction with scenario 1 shown in fig. 3 and4, if the operator to which the SIM card used by the UE belongs is radio, the HPLMN stored by the UE is 46015. Since the co-established cell 103 is a network device of a network standard 5G deployed by radio, television and mobile, when the UE is in the co-established cell 103, the broadcast message (such as MIB signaling) acquired from the network device is analyzed to PLMN of 46000 and PLMN of 46015. Since the co-deployed network devices do not support roaming access, at this time, when the UE requests to access the co-established cell 103, it needs to search 46015, so that when the frequency point is searched under the 46015, the registration information can be sent to the network device corresponding to the co-established cell 103 through the frequency point. After the UE successfully resides in the co-established cell 103, the UE is powered off, and when the UE moves to another cell 102 and is powered on, the UE determines that the RPLMN is not stored (46015). At this time, the UE needs to search the historical camping frequency point of each system of the HPLMN (46015) in another cell 102, and if no frequency point is searched at the historical camping frequency point of each system of the HPLMN (46015), the UE searches under the searched historical camping frequency point of each system of the PLMN. If the historical residing frequency point of each system of the searched PLMN is the searched frequency point (such as the frequency point B), the UE searches the Full Band of each system of the HPLMN (46015). And determining that no frequency point is searched under the Full Band of each standard of the HPLMN (46015), and searching by the UE under the Full Band of each standard of the searched PLMN.

It should be noted that the implementation manners of S1202-S1204 are similar to the corresponding implementation procedures in S12-S14, and are not described herein again.

If no frequency point is searched under the historical residing frequency point 6 of the HPLMN, the UE may sort the currently searched PLMNs according to a preconfigured PLMN priority search order to determine a priority order of each currently searched PLMN, and sequentially search under each PLMN according to the priority order, if the PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, no frequency point is searched under the historical residing frequency point 6 of the HPLMN, and the UE switches to the PLMN-B to perform the search, that is, S15 and S16 shown in fig. 2 are executed.

If the frequency point is not searched under the historical residing frequency point 3 of the PLMN-B, S16 is executed.

S16, the UE searches the historical residing frequency point (such as the historical residing frequency point 4) of the second standard of the PLMN-B. And if the frequency point is searched in the historical resident frequency point 4 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2.

And if the frequency point is not searched in the historical resident frequency point 4 of the PLMN-B, executing S1205.

S1205, the UE searches for Full Band (for example, called Full Band5) of the first standard under the HPLMN. And if the frequency point is searched under Full Band5 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3. If no frequency point is searched under Full Band5 of the HPLMN, the UE searches for Full Band (for example, called Full Band6) of the second standard of the HPLMN. And if the frequency point is searched under Full Band6 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 1. If no frequency bin is searched under Full Band6 of the HPLMN, S17 is executed.

S17, the UE searches Full Band (called as Full Band3) of the first standard of PLMN-B.

And if the frequency point is searched in the Full Band4 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2.

If no frequency point is searched in Full Band4 of PLMN-B, the remaining PLMNs are searched continuously according to the priority order determined in the above step S1204. And determining that no frequency point is searched in the historical resident frequency points of the rest PLMN, and entering OOS when no frequency point is searched in the Full Band of the rest PLMN.

By adopting the technical scheme, in the prior art, when the UE is in the scene 1, the scene 2, the scene 3 and the scene 4, and the UE searches in the Full Band of each system of the PLMN, the process will occupy a large amount of time for cell search. Therefore, according to the cell search method provided by the embodiment of the application, when the HPLMN is determined to be the predefined PLMN and the RPLMN information is not stored, after the UE searches at the historical residing frequency point of each system of one PLMN, if it is determined that no frequency point is searched in the historical residing frequency point of each system of the PLMN, it is not necessary to search at the Full Band of each system of the PLMN at this time, but directly switch to the searched PLMN for searching. When the frequency point is determined not to be searched in the historical resident frequency point of each system of other PLMN, the Full Band of each system of each PLMN is searched, and therefore the time length of cell search occupied by switching the PLMN can be saved.

Fig. 13 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to search the cell under the scenes 1, 2, 3 and4 is long. As shown in fig. 13, the method may include:

s1301, the UE determines that the HPLMN is the predefined PLMN.

S11, the UE determines the information of the stored RPLMN, and executes S12.

S12, the UE searches the historical residing frequency point (for example, referred to as the historical residing frequency point 1) in the first mode of the RPLMN. And if the frequency point is searched under the historical resident frequency point 1 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

And S13, the UE searches the historical residing frequency point (for example, referred to as the historical residing frequency point 2) of the second standard of the RPLMN. And if the frequency point is searched under the historical resident frequency point 2 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as: the UE sends registration information to the network device 1.

For example, taking the first cell as the co-established cell 103 and the second cell as the other cell 102 as an example, in conjunction with scenario 1 shown in fig. 3 and4, if the operator to which the SIM card used by the UE belongs is radio, the HPLMN stored by the UE is 46015. Since the co-established cell 103 is a network device of a network standard 5G deployed by radio, television and mobile, when the UE is in the co-established cell 103, the broadcast message (such as MIB signaling) acquired from the network device is analyzed to PLMN of 46000 and PLMN of 46015. Since the co-deployed network devices do not support roaming access, at this time, when the UE requests to access the co-established cell 103, it needs to search 46015, so that when the frequency point is searched under the 46015, the registration information can be sent to the network device corresponding to the co-established cell 103 through the frequency point. After the UE successfully resides in the co-established cell 103, the UE is powered off, and when the UE moves to another cell 102 and is powered on, the UE determines that the RPLMN is stored (46015). At this time, the UE needs to search the historical camping frequency point of each standard of 46015 in other cells 102, and if no frequency point is searched at the historical camping frequency point of each standard of 46015, the UE searches at the searched historical camping frequency point of each standard of the PLMN. If the historical resident frequency points of each system of the searched PLMN are all the searched frequency points (such as the frequency point B), the UE searches in the Full Band of each system of the RPLMN. And determining that no frequency point is searched under the Full Band of each system of the RPLMN, and searching by the UE under the searched Full Band of each system of the PLMN.

If the frequency point is not searched under the historical residing frequency point 2 of the RPLMN, S15 is executed.

If no frequency point is searched under the historical residing frequency point 2 of the RPLMN, the UE sorts the currently searched PLMNs according to a preset PLMN priority searching sequence to determine the priority sequence of each currently searched PLMN, and searches under each PLMN in turn according to the priority sequence, if the PLMN-B is the PLMN with the highest priority in the currently searched PLMNs, no frequency point is searched under the historical residing frequency point 2 of the RPLMN, the UE switches to the PLMN-B to search, namely, S15 and S16 shown in FIG. 2 are executed.

It should be noted that the RPLMN stored in the card file of the SIM card in S1301 is different from that of PLMN-B.

If no frequency point is searched in the historical residing frequency point 4 of the PLMN-B and no frequency point is searched under the historical residing frequency point 4 of the EPLMN, S14 is executed.

And if the frequency point is searched under Full Band1 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3. If no frequency point is searched under the Full Band1 of the RPLMN, then the Full Band (such as the Full Band2) of the second standard of the RPLMN is searched. And if the frequency point is searched under Full Band2 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 1. If no frequency point is searched under Full Band2 of RPLMN, then S17 is executed.

And if the frequency point is not searched in the Full Band4 of the PLMN-B, continuing to search the rest PLMNs according to the priority order determined by the S13. And determining that no frequency point is searched in the historical resident frequency points of the rest PLMN, and entering OOS when no frequency point is searched in the Full Band of the rest PLMN.

By adopting the technical scheme, in the prior art, when the UE is in the scene 1, the scene 2, the scene 3 and the scene 4, and the UE searches in the Full Band of each system of the PLMN, the process will occupy a large amount of time for cell search. Therefore, according to the cell search method provided by the embodiment of the application, when the HPLMN is determined to be the predefined PLMN and the card file of the SIM card is determined to store the RPLMN information, after the UE searches at the historical residing frequency point of each system of one PLMN, if it is determined that no frequency point is searched in the historical residing frequency points of each system of the PLMN, it is not necessary to search at the Full Band of each system of the PLMN at this time, and the cell search method is directly switched to the searched PLMN for searching. When the frequency point is determined not to be searched in the historical resident frequency point of each system of other PLMN, the Full Band of each system of each PLMN is searched, and therefore the time length of cell search occupied by switching the PLMN can be saved.

Fig. 14 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to search the cell under the scenes 1, 2, 3 and4 is long. As shown in fig. 14, the method may include:

s1401, the UE determines that the HPLMN is the predefined PLMN.

S1402, the UE increases the EPLMN in the second mode.

And S1403, the UE determines that the information of the RPLMN is not stored.

It should be noted that the implementation principle of S1403 is similar to that of S1202 shown in fig. 12 in the foregoing embodiment, and is not described here again.

S1404, the UE searches the historical residing frequency point (for example, referred to as historical residing frequency point 5) in the first standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 5 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

If no frequency point is searched under the historical residing frequency point 5 of the RPLMN, then S1405 is executed.

S1405, the UE searches the historical residing frequency point (for example, the historical residing frequency point 6) of the second standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 6 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Or, when the frequency point is searched under the historical residing frequency point 6 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. Such as: the UE sends registration information to the network device 1. If no frequency point is searched under the HPLMN history resident frequency point 6, S1406 is executed.

S1406, the UE searches for Full Band (for example, called Full Band5) of the first standard under the HPLMN. And if the frequency point is searched under Full Band5 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3. If no frequency point is searched under Full Band5 of the HPLMN, the UE searches for the Full Band (for example, called Full Band6) of the second standard of the HPLMN. And if the frequency point is searched under Full Band6 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 1. Or, the UE sends registration information to the network device of the cell corresponding to the frequency point when the frequency point is searched under Full Band6 of the EPLMN. Such as the UE sending registration information to the network device 2. If no bin is searched under Full Band6 of HPLMN and no bin is searched under Full Band6 of EPLMN, S15 shown in fig. 2 is performed.

It should be noted that the implementation manner of S1404-S1406 is similar to the corresponding implementation process in S12-S14, and is not described herein again.

If no frequency point is searched under the historical residing frequency point 6 of the HPLMN, the UE may sort the currently searched PLMNs according to a preconfigured PLMN priority search order to determine a priority order of each currently searched PLMN, and sequentially search under each PLMN according to the priority order, if the PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, no frequency point is searched under the historical residing frequency point 6 of the HPLMN, and the UE switches to the PLMN-B to perform the search, that is, S15 shown in fig. 2 is executed.

And if the frequency point is not searched under the historical resident frequency point 3 of the PLMN-B, executing S1407.

S1407, the UE searches the historical residing frequency point (for example, the historical residing frequency point 4) of the second system of the PLMN-B. And if the frequency point is searched in the historical resident frequency point 4 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2. Or, if the frequency point is searched in the historical residing frequency point 4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2.

If no frequency point is searched in the historical residing frequency point 4 of the PLMN-B and no frequency point is searched under the historical residing frequency point 4 of the EPLMN, S1408 is executed.

S1408, the UE searches for Full Band (for example, called Full Band3) of the first standard of PLMN-B.

And if the frequency point is searched in the Full Band4 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2. Or, if the frequency point is searched in Full Band4 of the EPLMN, sending the registration information to the network device of the cell corresponding to the frequency point, for example, sending the registration information to the network device 2 by the UE.

And if no frequency point is searched in the Full Band4 of the PLMN-B and no frequency point is searched in the Full Band4 of the EPLMN, continuing to search the rest PLMNs according to the priority order determined by the S1406. And determining that no frequency point is searched in the historical resident frequency points of the rest PLMN, and entering OOS when no frequency point is searched in the Full Band of the rest PLMN.

Specifically, the predefined PLMN, EPLMN, and PLMN-B are all different.

For example, in conjunction with fig. 14, after performing S1401-S1405 shown in fig. 14 in the foregoing embodiment, the UE determines that no frequency point is searched under the historical residing frequency point 6 of the HPLMN, and no frequency point is searched under the historical residing frequency point 6 of the EPLMN, then performs S15 and S16 shown in fig. 2 in the foregoing embodiment. Thus, the UE does not need to perform S15 and S16 shown in fig. 2 in the foregoing embodiment after performing S1406 shown in fig. 14 in the foregoing embodiment and determining that no frequency point is searched under Full Band6 of the HPLMN and no frequency point is searched under Full Band6 of the EPLMN. Therefore, the process of searching in Full Band of each system of PLMN, which occupies a large amount of cell search time, can be skipped, and the time for switching PLMN when UE performs cell search is shortened. When no frequency point is searched in the historical residing frequency point 4 of the PLMN-B and no frequency point is searched under the historical residing frequency point 4 of the EPLMN, S1406 shown in fig. 14 in the foregoing embodiment and S17 shown in fig. 2 in the foregoing embodiment are executed, so that the time length for the UE to perform cell search can be shortened.

By adopting the technical scheme, in the prior art, when the UE is in any one of the scene 1, the scene 2, the scene 3 and the scene 4, and the UE searches under one PLMN, even if the frequency point in the historical residing frequency point of the EPLMN is searched, the UE cannot immediately initiate registration to the network device, that is, when the UE must determine that the frequency point is not searched in the historical residing frequency point of any system of the PLMN, and after the UE is switched to the EPLMN, the UE can initiate registration to the network device when the frequency point in the historical residing frequency point of the EPLMN is searched again. Therefore, according to the cell search method provided in the embodiment of the present application, when the UE determines that the HPLMN is the predefined PLMN and determines that the RPLMN information is not stored, by adding the EPLMN of the second system, if the UE searches for the historical residing frequency point of the HPLMN of the second system, if the frequency point in the historical residing frequency point of the EPLMN is searched, the UE immediately initiates registration to the network device, and the UE does not need to initiate registration to the network device when determining that the frequency point is not searched in the historical residing frequency point of any system of the HPLMN and after switching to the EPLMN, and then searches for the frequency point in the historical residing frequency point of the EPLMN again, so that the time for cell search occupied by switching to the PLMN can be saved.

Fig. 15 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to search the cell under the

scenes

1, 2, 3, 4 and5 is long.

As shown in fig. 15, the method may include:

s1501, the UE determines that the HPLMN is the predefined PLMN.

S1502, the UE determines that the EPLMN is the FPLMN of the first system.

And S11, the UE determines that the information of the RPLMN is stored.

And if the frequency point is searched under Full Band1 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

If no frequency point is searched under the Full Band1 of the RPLMN, then the Full Band (such as Full Band2) of the second standard of the RPLMN is searched. And if the frequency point is searched under Full Band2 of the RPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 1.

When the EPLMN of the UE is PLMN-B, the UE determines that the EPLMN is the FPLMN of the first system. Therefore, when the UE searches at the historical camping frequency point of each system of the PLMN-B, it is not necessary to search at the historical camping frequency point of the first system of the PLMN-B, that is, it is not necessary to perform S15 shown in fig. 2 in the foregoing embodiment, but directly perform S16. Therefore, the time length of cell search occupied by the UE for searching the frequency point under the historical resident frequency point of the first standard of the PLMN-B can be saved.

For example, taking the first cell as the co-established cell 103 and the second cell as the other cell 102 as an example, in conjunction with scenario 1 shown in fig. 3 and4, if the operator to which the SIM card used by the UE belongs is radio, the HPLMN stored by the UE is 46015. And because the network equipment with the network standard of 5G is jointly deployed by the radio and the mobile, and the radio rents the network equipment with the network standard of 4G, the users of the radio and the television can access the network equipment which is independently deployed by the mobile in a roaming way within the coverage range of the network equipment which is not deployed by the radio and the television. Therefore, in the embodiment of the present application, 46000, which determines movement, is EPLMN of 46015 at 4G. Meanwhile, the network devices of other cell 102 pairs only provide 46000 with a frequency point of 4G, but not 46000 with a frequency point of 5G. Since the co-established cell 103 is a network device of a network standard 5G deployed by radio, television and mobile, when the UE is in the co-established cell 103, the broadcast message (such as MIB signaling) acquired from the network device is analyzed to be a PLMN of 46015 and a PLMN of 46000. At this time, when the UE requests to access the co-established cell 103, it needs to search 46015, so that when the frequency point is searched under 46015, the registration information can be sent to the network device corresponding to the co-established cell 103 through the frequency point. When the UE is powered off after successfully residing in the co-established cell 103 and is moved to other cells 102 to be powered on, the RPLMN information stored by the UE is 46015, and the other cells 102 move the cells corresponding to the network devices with the network standard of 4G which are independently deployed. The UE determines that RPLMN is kept (46015), so the UE needs to search for historical camping frequency points of 46015 per standard in other cells 102, or to search for Full Band of 46015 per standard. Since the PLMN of the network device in the other cell 102 is 46000, that is, only the frequency point (e.g., frequency point B) of 4G with the PLMN 46000 is provided in the other cell 102, the UE cannot search the frequency point (e.g., frequency point a) in the historical camping frequency point of any standard of 46015, and the UE cannot search the frequency point (e.g., frequency point a) in the Full Band of any standard of 46015. At this time, when the UE searches for the 46000, it is not necessary to search for the 5G historical camping frequency point of the 46000, but directly searches for the 4G historical camping frequency point of the 46000, and when a frequency point is searched for in the 4G historical camping frequency point of the 46000, the UE sends registration information to the network device corresponding to the frequency point. Therefore, the time length of cell search occupied by the UE for searching the frequency point under the 46000 5G historical residing frequency point can be saved.

It should be noted that, in the scenario 2, the scenario 3, and the scenario 4 shown in fig. 5 to fig. 7, when the UE searches under the EPLMN, a process of searching without the history resident frequency point of the first system of the EPLMN is similar to the process of the UE in the scenario 1, and is not described herein again.

If no frequency point is searched under Full Band2 of RPLMN, then S16 is executed.

If no frequency point is searched under Full Band2 of RPLMN, UE will search in turn according to the priority order of each PLMN searched currently, if the priority of PLMN-B is determined to be the highest, then switch to PLMN-B for searching.

It should be noted that the PLMN indicated by the information of the RPLMN stored in the card file of the SIM card in S11 is different from PLMN-B.

If the frequency point is not searched in the historical residing frequency point 4 of the PLMN-B, S17 is executed.

If no frequency point is searched in the Full Band4 of the PLMN-B, the remaining PLMNs are searched continuously according to the priority order determined in the above S1004. And when determining that the frequency point is not searched under the residual PLMN, entering OOS.

In the above example, when a PLMN is subjected to cell search, first, a search is performed at a historical camping frequency point of any system of the PLMN, and when no frequency point is searched at the historical camping frequency point of any system of the PLMN, the UE performs a search at a Full Band of each system of the PLMN. The following description is given by taking an example in which when no frequency point is searched under Full Band of each system of the PLMN, the PLMN is switched to the searched PLMN for searching. Since the UE searches in Full Band of each system of the PLMN, the process may occupy a large amount of time for cell search. Therefore, in some other embodiments of the present application, when the UE searches under one PLMN, the UE first searches under the historical camping frequency point of each system of each PLMN. And if the frequency point is not searched under the historical resident frequency point of each system of each PLMN, the UE searches under the Full Band of each system of each PLMN. And when the frequency point is not searched under the Full Band of each system of each PLMN, switching to the searched PLMN for searching, thereby shortening the time length for the UE to search the cell.

For example, with reference to fig. 15, after the UE performs S1501 to S13 shown in fig. 15 in the foregoing embodiment, it is determined that no frequency point is searched under the historical camping frequency point 2 of the RPLMN, and then performs S16 shown in fig. 2 in the foregoing embodiment. Therefore, after performing S14 shown in fig. 2 in the foregoing embodiment, the UE does not need to determine that no frequency point is searched under Full Band2 of the RPLMN, and then performs S16 shown in fig. 2 in the foregoing embodiment, so that a large amount of cell search time duration can be occupied in the process of searching for Full bands of each system of PLMNs, and the time duration for switching PLMNs when the UE performs cell search is shortened. Meanwhile, since it is not necessary to perform S15 shown in fig. 2 in the foregoing embodiment, the duration of the cell search occupied by S15 may be further omitted. When the frequency point is not searched in the historical residing frequency point 4 of the PLMN-B, S17 shown in fig. 2 in the foregoing embodiment is executed, so that the time length for the UE to perform cell search can be shortened.

With the above technical solution, in the prior art, when the UE is in any one of the

above scenarios

1, 2, 3, 4, and5, the UE needs to perform cell search according to the flow shown in fig. 1. Therefore, according to the cell search method provided by the embodiment of the application, the UE determines that the EPLMN is the FPLMN of the first system, so that when the search is performed under the EPLMN, the search is not required to be performed under the historical residing frequency point of the first system of the EPLMN, the cell search time occupied by the UE for searching the frequency point under the historical residing frequency point of the first system of the PLMN-B can be saved, and the total time occupied by the UE for performing the cell search is shortened.

Fig. 16 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to search the cell under the

scenes

1, 2, 3, 4 and5 is long.

As shown in fig. 16, the method may include:

s1601, the UE determines that the HPLMN is the predefined PLMN.

S1602, the UE determines that the EPLMN is the FPLMN of the first system.

S1603, the UE determines that the information of the RPLMN is not stored.

S1604, the UE searches for the historical residing frequency point (for example, referred to as historical residing frequency point 5) in the first standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 5 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

And if the frequency point is not searched under the historical resident frequency point 5 of the RPLMN, executing S1605.

S1605, the UE searches the historical residing frequency point (for example, the historical residing frequency point 6) of the second standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 6 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as: the UE sends registration information to the network device 1.

If no frequency point is searched under the HPLMN historical camping frequency point 6, S1606 is executed.

S1606, the UE searches for Full Band (for example, called Full Band5) of the first standard under the HPLMN. And if the frequency point is searched under Full Band5 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3. If no frequency point is searched under Full Band5 of the HPLMN, the UE searches for the Full Band (for example, called Full Band6) of the second standard of the HPLMN. And if the frequency point is searched under Full Band6 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 1.

If no frequency bin is searched under Full Band6 of the HPLMN, S16 is executed.

If no frequency point is searched under Full Band6 of the HPLMN, the UE may sort the currently searched PLMNs according to a preconfigured PLMN priority search order to determine a priority order of each currently searched PLMN, and sequentially search under each PLMN according to the priority order, for example, if PLMN-B is the highest priority PLMN among the currently searched PLMNs, no frequency point is searched under Full Band6 of the HPLMN, and the UE switches to PLMN-B to perform the search, that is, S16 shown in fig. 2 is performed.

If no frequency point is searched in the Full Band4 of PLMN-B, the remaining PLMNs are searched continuously according to the priority order determined in the above step S1606. And when determining that the frequency point is not searched under the residual PLMN, entering OOS.

For example, referring to fig. 16, after the UE performs S1601 to S1604 shown in fig. 16 in the foregoing embodiment, it is determined that no frequency point is searched under the historical camping frequency point 6 of the HPLMN, and then S16 shown in fig. 2 in the foregoing embodiment is performed. Therefore, after the UE performs 1605 shown in fig. 2 in the foregoing embodiment, it is not necessary to determine that no frequency point is searched under Full Band6 of the HPLMN, and then S16 shown in fig. 2 in the foregoing embodiment is performed, so that a large amount of cell search duration can be occupied in the process of performing search on Full bands of each system of PLMNs, and the duration of switching PLMNs when the UE performs cell search is shortened. Meanwhile, since it is not necessary to perform S15 shown in fig. 2 in the foregoing embodiment, the duration of the cell search occupied by S15 may be further omitted. When the frequency point is not searched in the historical residing frequency point 4 of the PLMN-B, S17 shown in fig. 2 in the foregoing embodiment is executed, so that the time length for the UE to perform cell search can be shortened.

above scenarios

Fig. 17 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to search the cell under the

scenes

1, 2, 3, 4 and5 is long.

As shown in fig. 17, the method may include:

s1701, the UE determines the HPLMN as a predefined PLMN.

S1702, the UE determines that the EPLMN is the FPLMN of the first system, and increases the EPLMN of the second system.

And S11, the UE determines that the information of the RPLMN is stored.

S1703, the UE searches the historical residing frequency point (for example, the historical residing frequency point 5) in the first standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 5 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

If no frequency point is searched under the historical residing frequency point 5 of the RPLMN, S1704 is executed.

S1704, the UE searches the historical residing frequency point (such as the historical residing frequency point 6) of the second standard of the HPLMN. And if the frequency point is searched under the historical resident frequency point 6 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as: the UE sends registration information to the network device 1. Or, when the frequency point is searched under the historical residing frequency point 6 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. Such as: the UE sends registration information to the network device 2.

If the frequency point is not searched under the historical residing frequency point 6 of the HPLMN and the frequency point is not searched under the historical residing frequency point 6 of the EPLMN, S16 is executed.

If no frequency point is searched under the historical residing frequency point 6 of the HPLMN and no frequency point is searched under the historical residing frequency point 6 of the EPLMN, the UE will sort the currently searched PLMNs according to a preconfigured PLMN priority search order to determine a priority order of each currently searched PLMN, and sequentially search under each PLMN according to the priority order, if the PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, no frequency point is searched under the historical residing frequency point 6 of the HPLMN and no frequency point is searched under the historical residing frequency point 6 of the EPLMN, and the UE switches to the PLMN-B to search, that is, S16 shown in fig. 2 is executed.

S16, the UE searches the historical residing frequency point (such as the historical residing frequency point 4) of the second standard of the PLMN-B. And if the frequency point is searched in the historical resident frequency point 4 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2. Or if the frequency point is searched in the historical resident frequency point 4 of the EPLMN, sending the registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2.

If no frequency point is searched in the historical residing frequency point 4 of the PLMN-B, S1705 is executed.

S1705, the UE searches for Full Band (for example, called Full Band5) of the first standard under the HPLMN. And if the frequency point is searched under Full Band5 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3. If no frequency point is searched under Full Band5 of the HPLMN, the UE searches for Full Band (for example, called Full Band6) of the second standard of the HPLMN. And if the frequency point is searched under Full Band6 of the HPLMN, the UE sends registration information to the network equipment of the cell corresponding to the frequency point. Or, the UE sends registration information to the network device of the cell corresponding to the frequency point when the frequency point is searched under Full Band6 of the EPLMN. Such as the UE sending registration information to the network device 1. If no frequency point is searched under Full Band6 of HPLMN and no frequency point is searched under Full Band6 of EPLMN, S1706 is executed.

S1706, the UE searches for a Full Band (for example, called Full Band3) of the first standard of the PLMN-B.

And if the frequency point is searched in the Full Band4 of the PLMN-B, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2. Or the frequency point is searched in Full Band4 of the EPLMN, and then the registration information is sent to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2.

If no frequency point is searched in Full Band4 of PLMN-B and no frequency point is searched in Full Band4 of EPLMN, then the remaining PLMNs are searched continuously according to the priority order determined by 1704. And determining that no frequency point is searched in the historical resident frequency points of the rest PLMN, and entering OOS when no frequency point is searched in the Full Band of the rest PLMN.

It should be noted that, after the UE determines that the HPLMN is the predefined PLMN, the UE determines that the EPLMN is the FPLMN of the first system, and adds the EPLMN in the second system. At this time, if the UE determines that the information of the RPLMN is not stored, the UE continues to perform the processes from S1703 to S1706 as shown in fig. 17, which is not described herein again.

Since the UE cannot determine which of the above-described scene 1, scene 2, scene 3, scene 4, and scene 5 is currently located. Therefore, the cell search method provided by the embodiment of the application determines that the HPLMN is the predefined PLMN, and when the card file of the SIM card stores the information of the RPLMN, the cell search method directly performs the search under the HPLMN, so that the time length of cell search occupied by performing the search under the RPLMN is saved. Further, by adding the EPLMN in the second system, when the UE searches at the historical camping frequency point of each system of each PLMN, if a frequency point in the historical camping frequency point of any system of the EPLMN is searched, the UE may directly send the registration information to the network device corresponding to the frequency point. And the UE determines that the EPLMN is the FPLMN of the first system, so that the UE does not need to search under the historical residing frequency point of the first system of the EPLMN, the time length of cell search occupied by the UE for searching the frequency point under the historical residing frequency point of the first system of the PLMN-B can be saved, and the total time length occupied by the UE for searching the cell is shortened. Finally, when the UE searches in the Full Band of each system of a PLMN, the process may occupy a large amount of time for cell search. Therefore, in some other embodiments of the present application, when the UE searches under one PLMN, the UE first searches under the historical camping frequency point of each system of each PLMN. And if the frequency point is not searched under the historical resident frequency point of each system of each PLMN, the UE searches under the Full Band of each system of each PLMN. And when the frequency point is not searched under the Full Band of each system of each PLMN, switching to the searched PLMN for searching, thereby shortening the time length for the UE to search the cell.

In some other embodiments of the present application, a failure of service interruption may occur when the UE successfully resides in a cell of the network device, for example, when the UE performs an elevator from the outside, the failure of service interruption may occur to the UE, and the UE may attempt to recover service. For this reason, the cell search procedure provided in the related art, as shown in fig. 18, may specifically include:

s1801, the UE cyclically performs the first operation N times, where N is an integer greater than or equal to 0.

The first operation is to search under the historical resident frequency point of the first system of the HPLMN.

And if the frequency point is searched under the historical resident frequency point of the first standard of the HPLMN, sending registration information to the network equipment corresponding to the frequency point. Such as sending registration information to the network device 3.

If the frequency point is not searched under the historical resident frequency point of the first standard of the HPLMN after the first operation is executed circularly for N times, S1802 is executed.

And S1802, the UE circularly executes the second operation for M times, wherein M is an integer greater than or equal to 0.

Wherein the second operation is to search under Full Band of the first system of the HPLMN.

And if the frequency point is searched under the Full Band of the first standard of the HPLMN, sending registration information to the network equipment corresponding to the frequency point. Such as sending registration information to the network device 3.

If the frequency point is not searched under the Full Band of the first standard of the HPLMN after the second operation is executed cyclically M times, S1803 is executed.

And S1803, the UE searches under the historical residing frequency point of each system of other PLMNs, and if the frequency point is not searched under the historical residing frequency point of each system of other PLMNs, the UE searches under the Full Band of each system of other PLMNs. If no frequency bin is searched under Full Band of each system of other PLMNs, S1801 is executed.

If the frequency point is searched under the historical camping frequency point of each system of other PLMNs, or the frequency point is searched under the Full Band of each system of other PLMNs, S1804 is performed.

S1804, searching frequency points under the historical resident frequency points of each system of other PLMNs, and searching frequency points under the Full Band of each system of other PLMNs, and determining a network selection list.

It should be noted that, in the cell search process provided in the embodiment of the present application, the technical solutions shown in fig. 9 to 18 may be performed to search for the RPLMN, or search for the HPLMN, or search for the EPLMN. For the PLMN searched during the search by the RPLHN or the HPLNM, the technical solutions shown in fig. 13 or fig. 14 may be executed.

Fig. 19 is a flowchart illustrating a cell search method according to an embodiment of the present application. The cell search method is used for solving the problem that the time for the UE to perform cell search is long under the scenario (for example, the scenario in which the UE recovers service in other cells 102, that is, the UE accesses the other cells in fig. 20) shown in fig. 20. As shown in fig. 19, the method may include:

s1901, the UE loops n times for the third operation. Wherein n is an integer greater than or equal to 0.

Wherein the third operation comprises: searching is carried out under a historical residing frequency point (such as a historical residing frequency point 5) of a first standard of the HPLMN, and if the frequency point is searched under the historical residing frequency point 5 of the HPLMN, registration information is sent to network equipment of a cell corresponding to the frequency point.

And if the frequency point is searched under the historical resident frequency point 5 of the HPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 3.

If the frequency point is not searched under the historical residing frequency point 5 of the HPLMN, the UE searches the historical residing frequency point (such as the historical residing frequency point 7) under the second standard of the EPLMN.

And if the frequency point is searched under the historical residing frequency point 7 of the EPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as the UE sending registration information to the network device 2.

And if the frequency point is not searched under the historical residing frequency point 7 of the EPLMN, continuing to search under the historical residing frequency point of the first standard of the HPLMN.

If the frequency point is not searched under the historical residing frequency point 5 of the HPLMN and the frequency point is not searched under the historical residing frequency point 7 of the EPLMN after the third operation is executed in a loop for n times, S1902 is executed.

S1902, the UE loops m fourth operations. Wherein m is an integer greater than or equal to 0.

Wherein the fourth operation comprises: searching is carried out under Full Band (for example, called as Full Band5) of a first standard of the HPLMN, and if a frequency point is searched under Full Band5 of the HPLMN, registration information is sent to network equipment of a cell corresponding to the frequency point. Such as sending registration information to the network device 3.

If no frequency point is searched under Full Band5 of HPLMN, then search is carried out under Full Band (such as Full Band7) of second standard of EPLMN.

And if the frequency point is searched under Full Band7 of the first standard of the EPLMN, sending registration information to the network equipment of the cell corresponding to the frequency point. Such as sending registration information to network device 2.

If the frequency point is not searched under the Full Band7 of the EPLMN network standard 7, the search is continued under the Full Band5 of the HPLMN first standard.

If the frequency point is not searched under Full Band5 of the HPLMN and the frequency point is not searched under Full Band7 of the EPLMN after the fourth operation is executed m times in a loop, S1803 and S1804 shown in fig. 18 are executed.

As described in the foregoing embodiment, in the scenario corresponding to fig. 20, when the UE attempts to recover the service, it needs to search for the historical camping frequency point of the first standard of the HPLMN N times. If no frequency point is searched on the historical resident frequency point of the first standard of the HPLMN in the N searches, the Full Band of the first standard of the HPLMN needs to be searched for M times. And if no frequency point is searched on the Full Band of the first system of the HPLMN in the M searches, switching to the searched PLMN for searching. Because the network system of the network device corresponding to the other cell where the UE is currently located is the second system, and the PLMNs of the other cells are different from the PLMN corresponding to the information of the HPLMN stored in the card file of the SIM card of the UE, at this time, the UE cannot search for the frequency point of the first system of the HPLMN at the historical residence time of the HPLMN, or cannot search for the frequency point of the first system of the HPLMN at the Full Band of the first system of the HPLMN, so that the UE cannot recover the service. Therefore, in the embodiment of the present application, in the scenario corresponding to fig. 20, when the UE attempts to recover the service, it needs to search at the historical camping frequency point of the first standard of the HPLMN and search at the historical camping frequency point of the first standard of the EPLMN N times, so that the UE can recover the service when attempting the service in the scenario corresponding to fig. 20. If the historical residing frequency point of the first standard of the HPLMN is searched, and the historical residing frequency point of the first standard of the EPLMN is searched for N times, no frequency point is searched on the historical residing frequency point of the first standard of the HPLMN, and no frequency point is searched on the historical residing frequency point of the second standard of the EPLMN. Then search is performed in Full Band of the first standard of HPLMN and search is performed M times in Full Band of the first standard of EPLMN, so that it can be ensured that the UE can resume service.

For example, in combination with the scenario shown in fig. 20, if an operator to which a SIM card used by the UE belongs is a radio and television, the HPLMN stored by the UE is 46015, and because the network standard of the common deployment of the radio and the mobile is 5G network equipment, and the radio and television rents the network equipment of the mobile network standard of 4G, the user of the radio and television is in the coverage of the network equipment that is not deployed in the radio and television, and when the user of the radio and television is in the coverage of the network equipment that is independently deployed in the mobile, the user of the radio and television can access the network equipment that is independently deployed in the mobile in a roaming manner. Therefore, in the embodiment of the present application, 46000, which determines movement, is EPLMN of 46015 at 4G. The other cells 102 are cells corresponding to network devices with a network standard of 4G deployed independently, that is, only frequency points (such as frequency point B) of 4G with a PLMN of 46000 are provided in the other cells 102. When the UE requests to resume service in the other cell 102. Since 46000 is different from 46015, when the UE searches for the historical camping frequency point of 5G of 46015 in another cell 102, it cannot search for a frequency point (such as frequency point a) in the historical camping frequency point of 5G of 46015. At this time, the UE will continue to search for the historical camping frequency point of 4G of 46015, and since 46015 is 46000 EPLMN under 4G, the UE may search for a frequency point (e.g., frequency point B) in the historical camping frequency point of 4G of 46015, so that the UE may recover the service.

By adopting the above technical scheme, in the prior art, when the UE is in the scene corresponding to fig. 20, the UE cannot search the cell under the HPLMN when searching at the historical dwell frequency point of the first standard of the HPLMN and when searching at the Full Band of the first standard of the HPLMN. Therefore, according to the cell search method provided in the embodiment of the present application, when attempting to recover a service, the UE needs to search at the historical camping frequency point of the first standard of the HPLMN and search at the historical camping frequency point of the first standard of the EPLMN N times, so that when attempting to recover the service in the scenario corresponding to fig. 20, the UE can recover the service. If the historical residing frequency point of the first standard of the HPLMN is searched, and the historical residing frequency point of the first standard of the EPLMN is searched for N times, no frequency point is searched on the historical residing frequency point of the first standard of the HPLMN, and no frequency point is searched on the historical residing frequency point of the second standard of the EPLMN. Then search is performed in Full Band of the first standard of HPLMN and search is performed M times in Full Band of the first standard of EPLMN, so that it can be ensured that the UE can resume service.

It should be noted that, the above technical solution may optimize the cell search procedure shown in fig. 18, and may also optimize the cell search procedures shown in fig. 9 to fig. 17 provided in this embodiment, which is not limited herein.

The scheme provided by the embodiment of the application is mainly introduced from the perspective of a method. To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the electronic device may be divided into the functional modules according to the method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

As shown in fig. 21, a schematic structural diagram of a cell search apparatus 10 under multiple operators according to an embodiment of the present disclosure may include a transceiver 101 and a processing unit 102.

The cell search apparatus 10 under multiple operators may be applied to a user equipment UE. Under the condition that the UE meets the preset condition, the UE executes network searching operation; the UE stores the information of registered public land mobile network RPLMN, and the preset condition comprises starting up or cell reselection; the network searching operation comprises the following steps: and the processing unit 102 is configured to skip the process of searching under the RPLMN and search the HPLMN when the HPLMN of the UE is the predefined PLMN. The processing unit 102 is further configured to, when the frequency point is searched under the HPLMN, control the transceiver unit 101 to send registration information to the network device corresponding to the frequency point, where the registration information is used to request to access the network device. The areas or countries corresponding to the predefined PLMNs have co-established networks, and the network equipment providing the co-established networks corresponds to the PLMNs.

In an implementation manner, the transceiver 101 is configured to acquire location information of a UE. The processing unit 102 is further configured to determine, according to the location information acquired by the transceiver unit 101, that the country in which the UE is located is a predefined country.

In an implementable manner, a first operator to which a Subscriber Identity Module (SIM) card of the UE belongs and a second operator jointly deploy network equipment, and a Public Land Mobile Network (PLMN) of the second operator is an Ethernet passive local area network (EPLMN) of the UE; the processing unit 102 is further configured to send, by the UE, registration information to the network device corresponding to the frequency point of the EPLMN when the frequency point is not searched in the HPLMN and the frequency point of the EPLMN is searched.

In an implementation manner, the processing unit 102 is specifically configured to search the historical lingering frequency point of the first standard of the HPLMN. The processing unit 102 is specifically configured to search a historical residing frequency point of a second standard of the HPLMN under the condition that a frequency point is not searched under the historical residing frequency point of the first standard of the HPLMN, where a network device of the second standard allows the UE to access in a roaming manner, and the first standard is different from the second standard. The processing unit 102 is specifically configured to search the full frequency band of the first standard of the HPLMN when the frequency point is not searched for at the historical residing frequency point of the second standard of the HPLMN and the frequency point of the EPLMN is not searched for. The processing unit 102 is specifically configured to, when no frequency point is searched in a full frequency band of the first standard of the HPLMN, perform search by the UE in a full frequency band of the second standard of the HPLMN.

In an implementation manner, the processing unit 102 is specifically configured to control the transceiver unit 101 to send the registration information to the network device corresponding to the frequency point of the EPLMN when the frequency point is not searched at the historical camping frequency point of the second standard of the HPLMN and the frequency point of the EPLMN is searched. Or, the processing unit 102 is specifically configured to send the registration information to the network device corresponding to the frequency point of the EPLMN when the frequency point is not searched in the full frequency band of the second standard of the HPLMN and the frequency point of the EPLMN is searched.

In an implementable mode, a first operator and a second operator to which a Subscriber Identity Module (SIM) card used by UE belongs commonly deploy network equipment with a network standard of a first standard, a Public Land Mobile Network (PLMN) of the second operator is a field programmable logic controller (FPLMN) of the UE in the first standard, the network equipment of the second standard allows the UE to be accessed in a roaming mode, and the first standard is different from the second standard; the processing unit 102 is specifically configured to skip the process of searching the frequency point of the first standard of the EPLMN and search the frequency point of the second standard of the EPLMN when the frequency point is not searched in the HPLMN. The frequency points of the first standard comprise historical residing frequency points under the first standard and frequency points in a full frequency band, and the frequency points of the second standard comprise historical residing frequency points under the second standard and frequency points in the full frequency band.

In an implementation manner, the processing unit 102 is specifically configured to control the transceiver unit 101 to send the registration information to the network device corresponding to the frequency point when the frequency point is searched under the historical camping frequency point of the second standard. Or, the processing unit 102 is specifically configured to control the transceiver unit 101 to send the registration information to the network device corresponding to the frequency point when the frequency point is searched in the full frequency band of the second standard.

In an implementation manner, the processing unit 102 is specifically configured to search the historical camping frequency point of each system of the HPLMN. The processing unit 102 is specifically configured to search the historical residing frequency point of the PLMN, which is searched when the HPLMN is searched, when the frequency point is not searched under the historical residing frequency point of each system of the HPLMN. The processing unit 102 is specifically configured to search a full frequency band of each system of the HPLMN when no frequency point is searched at a history resident frequency point of the PLMN searched during the search of the HPLMN. The processing unit 102 is specifically configured to search the full frequency band of the PLMN searched when the HPLMN is searched, in a case that the frequency point is not searched in the full frequency band of each system of the HPLMN.

In one implementation, the predefined PLMN is 46015, the first standard is 5G, and the second standard is 4G.

In an implementation manner, the transceiver 101 is specifically configured to obtain current coordinates of the UE; wherein the coordinates are used to indicate the geographical location where the UE is currently located.

In an implementation manner, the processing unit 102 is specifically configured to perform emergency camping on a currently searched cell of an accessible network. Wherein, the accessible network corresponds to a PLMN; and the processing unit is specifically configured to determine the location information of the UE according to the PLMN accessible to the network.

In an implementation manner, the processing unit 102 is configured to, when the UE successfully resides in a cell of the network device, the service of the UE is interrupted, and a service recovery request is requested, search for a historical residence frequency point of the first standard of the HPLMN. The processing unit 102 is further configured to search the historical residing frequency point of the second standard of the EPLMN of the UE when the frequency point is not searched under the historical residing frequency point of the first standard of the HPLMN. The processing unit 102 is further configured to search a full frequency band of the first standard of the HPLMN when a frequency point is not searched at a historical residing frequency point of the second standard of the EPLMN; the processing unit 102 is further configured to search a full frequency band of the second system of the EPLMN when the frequency point is not searched in the full frequency band of the first system of the HPLMN. The processing unit 102 is further configured to search the PLMN searched when the HPLMN is searched, in a case where the frequency point is not searched in the full band of the second system of the EPLMN; the processing unit 102 is further configured to control the transceiver unit 101 to send registration information to the network device corresponding to the searched frequency point when the frequency point is searched.

All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and the function thereof is not described herein again.

Of course, the cell search apparatus 10 under multiple operators provided in the embodiment of the present application includes, but is not limited to, the above modules, for example, the cell search apparatus 10 under multiple operators may further include the storage unit 103. The storage unit 103 may be configured to store the program code of the cell search apparatus 10 under multiple operators, and may also be configured to store data generated by the cell search apparatus 10 under multiple operators during operation, such as data in a write request.

The cell search apparatus 10 under multiple operators in the embodiment of the present application may be the UE 110 shown in fig. 1, or may be a part of the UE 110. Such as a chip system in UE 110. The chip system is configured to support the UE 110 to implement the functions referred to in the first aspect, the second aspect, and any one of its possible implementations. For example, in the case that the HPLMN of the UE 110 is a predefined PLMN, the UE 110 skips the process of searching under the RPLMN, and searches for the HPLMN; under the condition that the frequency point is searched under the HPLMN, the UE 110 sends registration information to the network device corresponding to the frequency point. The chip system includes a chip and may also include other discrete devices or circuit structures.

Take the above electronic device as a mobile phone as an example. Please refer to fig. 22, which illustrates a schematic structural diagram of an electronic device 100 according to an embodiment of the present application.

The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a key 190, a motor 191, an indicator 192, a camera 193, a display screen 194, a Subscriber Identification Module (SIM) card interface 195, and the like. Wherein the sensor module 180 may include a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, etc.

It is to be understood that the illustrated structure of the embodiment of the present application does not specifically limit the electronic device 100. In other embodiments of the present application, electronic device 100 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Processor 110 may include one or more processing units, such as: the processor 110 may include an Application Processor (AP), a modem processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a memory, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), etc. The different processing units may be separate devices or may be integrated into one or more processors.

The controller may be, among other things, a neural center and a command center of the electronic device 100. The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 110, thereby increasing the efficiency of the system.

The charging management module 140 is configured to receive charging input from a charger.

The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charge management module 140 and provides power to the processor 110, the internal memory 121, the external memory, the display 194, the camera 193, the wireless communication module 160, and the like. The power management module 141 may also be used to monitor parameters such as battery capacity, battery cycle count, battery state of health (leakage, impedance), etc.

The wireless communication function of the electronic device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.

The antennas 1 and2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the electronic device 100 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide a solution including 2G/3G/4G/5G wireless communication applied to the electronic device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 150 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the electromagnetic wave to the modem processor for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the same device as at least some of the modules of the processor 110.

The modem processor may include a modulator and a demodulator. The modulator is used for modulating a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then passes the demodulated low frequency baseband signal to a baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor outputs a sound signal through an audio device (not limited to the speaker 170A, the receiver 170B, etc.) or displays an image or video through the display screen 194. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module 150 or other functional modules, independent of the processor 110.

The wireless communication module 160 may provide a solution for wireless communication applied to the electronic device 100, including Wireless Local Area Networks (WLANs) (e.g., wireless fidelity (Wi-Fi) networks), bluetooth (bluetooth, BT), Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and the like. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, perform frequency modulation and amplification on the signal, and convert the signal into electromagnetic waves through the antenna 2 to radiate the electromagnetic waves.

In some embodiments, antenna 1 of electronic device 100 is coupled to mobile communication module 150 and antenna 2 is coupled to wireless communication module 160 so that electronic device 100 can communicate with networks and other devices through wireless communication techniques. The wireless communication technology may include global system for mobile communications (GSM), General Packet Radio Service (GPRS), code division multiple access (code division multiple access, CDMA), Wideband Code Division Multiple Access (WCDMA), time-division code division multiple access (time-division code division multiple access, TD-SCDMA), Long Term Evolution (LTE), LTE, BT, GNSS, WLAN, NFC, FM, and/or IR technologies, etc. The GNSS may include a Global Positioning System (GPS), a global navigation satellite system (GLONASS), a beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and/or a Satellite Based Augmentation System (SBAS).

The electronic device 100 implements display functions via the GPU, the display screen 194, and the application processor. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and an application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

The display screen 194 is used to display images, video, and the like. The display screen 194 includes a display panel. The display panel may adopt a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-oeld, a quantum dot light-emitting diode (QLED), and the like. In some embodiments, the electronic device 100 may include 1 or N display screens 194, with N being a positive integer greater than 1.

The electronic device 100 may implement a shooting function through the ISP, the camera 193, the video codec, the GPU, the display 194, the application processor, and the like.

The ISP is used to process the data fed back by the camera 193. The camera 193 is used to capture still images or video. The digital signal processor is used for processing digital signals, and can process digital image signals and other digital signals. Video codecs are used to compress or decompress digital video. The NPU is a neural-network (NN) computing processor that processes input information quickly by using a biological neural network structure, for example, by using a transfer mode between neurons of a human brain, and can also learn by itself continuously. Applications such as intelligent recognition of the electronic device 100 can be realized through the NPU, for example: image recognition, face recognition, speech recognition, text understanding, and the like.

The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to extend the memory capability of the electronic device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music, video, etc. are saved in an external memory card.

The internal memory 121 may be used to store computer-executable program code, which includes instructions. The processor 110 executes various functional applications of the electronic device 100 and data processing by executing instructions stored in the internal memory 121. The internal memory 121 may include a program storage area and a data storage area. The storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. The storage data area may store data (such as audio data, phone book, etc.) created during use of the electronic device 100, and the like. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), and the like.

The electronic device 100 may implement audio functions via the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the headphone interface 170D, and the application processor. Such as music playing, recording, etc.

The audio module 170 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be disposed in the processor 110, or some functional modules of the audio module 170 may be disposed in the processor 110.

The speaker 170A, also called a "horn", is used to convert the audio electrical signal into an acoustic signal. The receiver 170B, also called "earpiece", is used to convert the electrical audio signal into an acoustic signal. The microphone 170C, also referred to as a "microphone," is used to convert sound signals into electrical signals. The headphone interface 170D is used to connect a wired headphone. The headset interface 170D may be the USB interface 130, or may be a 3.5mm open mobile electronic device platform (OMTP) standard interface, a cellular telecommunications industry association (cellular telecommunications industry association of the USA, CTIA) standard interface.

The pressure sensor is used for sensing a pressure signal and converting the pressure signal into an electric signal. The gyro sensor may be used to determine the motion pose of the electronic device 100. The air pressure sensor is used for measuring air pressure. The magnetic sensor includes a hall sensor. The acceleration sensor may detect the magnitude of acceleration of the electronic device 100 in various directions (typically three axes). A distance sensor for measuring a distance. The proximity light sensor may include, for example, a Light Emitting Diode (LED) and a light detector, such as a photodiode. The ambient light sensor is used for sensing the ambient light brightness. The fingerprint sensor is used for collecting fingerprints. The temperature sensor is used for detecting temperature. Touch sensors, also known as "touch panels". The bone conduction sensor may acquire a vibration signal. The keys 190 include a power-on key, a volume key, and the like. The motor 191 may generate a vibration cue. Indicator 192 may be an indicator light that may be used to indicate a state of charge, a change in charge, or a message, missed call, notification, etc.

The SIM card interface 195 is used to connect a SIM card. The SIM card can be brought into and out of contact with the electronic apparatus 100 by being inserted into the SIM card interface 195 or being pulled out of the SIM card interface 195. The electronic device 100 may support 1 or N SIM card interfaces, N being a positive integer greater than 1. The SIM card interface 195 may support a Nano SIM card, a Micro SIM card, a SIM card, etc. The same SIM card interface 195 can be inserted with multiple cards at the same time. The types of the plurality of cards may be the same or different. The SIM card interface 195 may also be compatible with different types of SIM cards. The SIM card interface 195 may also be compatible with external memory cards. The electronic device 100 interacts with the network through the SIM card to implement functions such as communication and data communication. In some embodiments, the electronic device 100 employs esims, namely: an embedded SIM card. The eSIM card can be embedded in the electronic device 100 and cannot be separated from the electronic device 100.

The methods shown in fig. 9-17, and fig. 19 of the above embodiments can be applied to the electronic device 100 described above.

Another embodiment of the present application further provides a computer-readable storage medium, which stores instructions that, when executed on a computer, cause the computer to perform the method shown in the above method embodiment.

In some embodiments, the disclosed methods may be implemented as computer program instructions encoded on a computer-readable storage medium in a machine-readable format or encoded on other non-transitory media or articles of manufacture.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A cell search method under multiple operators is applied to user equipment, and the cell search method comprises the following steps:

under the condition that the user equipment meets preset conditions, the user equipment executes network searching operation; the UE stores information of a registered public land mobile network, and the preset condition comprises starting up or cell reselection;

the network searching operation comprises the following steps:

in the case that the local public land mobile network of the user equipment is a predefined public land mobile network, the user equipment skips a process of searching under the registered public land mobile network, and searches the local public land mobile network;

under the condition that the frequency point is searched in the local public land mobile network, the user equipment sends registration information to network equipment corresponding to the frequency point, and the registration information is used for requesting to access the network equipment; wherein, a co-established network exists in a region or a country corresponding to the predefined public land mobile network, and network equipment providing the co-established network corresponds to a plurality of public land mobile networks;

under the condition that the user equipment is successfully resided in the cell of the network equipment, the service of the user equipment is interrupted, and when the service is requested to be recovered, the user equipment searches the historical residence frequency point of the first standard of the local public land mobile network;

under the condition that no frequency point is searched under the historical residing frequency point of the first standard of the local public land mobile network, the user equipment searches the historical residing frequency point of the second standard of the equivalent public land mobile network of the user equipment;

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the equivalent public land mobile network, the user equipment searches the full frequency band of the first standard of the local public land mobile network;

under the condition that the frequency point is not searched under the full frequency band of the first standard of the local public land mobile network, the user equipment searches the full frequency band of the second standard of the equivalent public land mobile network;

under the condition that the frequency point is not searched under the full frequency band of the second standard of the equivalent public land mobile network, the user equipment searches the public land mobile network searched when the local public land mobile network is searched;

and under the condition that the frequency point is searched, the user equipment sends registration information to the network equipment corresponding to the searched frequency point.

2. The method of claim 1, wherein if the local public land mobile network of the UE is a predefined public land mobile network, the UE skips a search procedure under the registered public land mobile network, and wherein the method further comprises, before searching the local public land mobile network:

the user equipment acquires the position information of the user equipment and determines the country of the user equipment to be a predefined country according to the position information.

3. The method of claim 1, wherein a first operator to which the subscriber identity module of the ue belongs and a second operator co-deploy network equipment, and a public land mobile network of the second operator is an equivalent public land mobile network of the ue;

the method further comprises the following steps:

and under the condition that the frequency point is not searched in the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the user equipment sends registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network.

4. The method of claim 3, wherein the searching under the local public land mobile network comprises:

the user equipment searches a historical resident frequency point of a first system of the local public land mobile network;

under the condition that a frequency point is not searched under a historical residing frequency point of a first standard of the local public land mobile network, the user equipment searches a historical residing frequency point of a second standard of the local public land mobile network, the network equipment of the second standard allows the user equipment to be accessed in a roaming mode, and the first standard is different from the second standard;

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network and no frequency point of the equivalent public land mobile network is searched, the user equipment searches the full frequency band of the first standard of the local public land mobile network;

and under the condition that the frequency point is not searched under the full frequency band of the first standard of the local public land mobile network, the user equipment searches under the full frequency band of the second standard of the local public land mobile network.

5. The method of claim 4, wherein when the frequency point is not searched in the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the sending, by the UE, the registration information to the network device corresponding to the frequency point of the equivalent public land mobile network comprises:

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the user equipment sends the registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network;

or, the user equipment sends the registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network under the condition that the frequency point is not searched in the full frequency band of the second standard of the local public land mobile network and the frequency point of the equivalent public land mobile network is searched.

6. The method according to claim 3, wherein a first operator and a second operator to which a subscriber identity module used by the ue belongs jointly deploy network devices with a first network standard, the public land mobile network of the second operator is a forbidden public land mobile network of the ue in the first standard, the network devices of the second standard allow the ue to access in a roaming manner, and the first standard is different from the second standard;

the method further comprises the following steps:

under the condition that the frequency point is not searched in the local public land mobile network, the user equipment skips the process of searching the frequency point of the first standard of the equivalent public land mobile network and searches the frequency point of the second standard of the equivalent public land mobile network; the frequency points of the first standard comprise historical residing frequency points under the first standard and frequency points in a full frequency band, and the frequency points of the second standard comprise historical residing frequency points under the second standard and frequency points in the full frequency band.

7. The method of claim 6, further comprising:

under the condition that the frequency point is searched under the historical resident frequency point of the second standard, the user equipment sends the registration information to the network equipment corresponding to the frequency point;

or,

and under the condition that the frequency point is searched under the full frequency band of the second standard, the user equipment sends the registration information to the network equipment corresponding to the frequency point.

8. The method of claim 1, wherein the searching under the local public land mobile network comprises:

searching historical resident frequency points of each system of the local public land mobile network;

under the condition that no frequency point is searched under the historical residing frequency point of each standard of the local public land mobile network, the user equipment searches the historical residing frequency point of the public land mobile network searched when the local public land mobile network is searched;

under the condition that no frequency point is searched under the historical resident frequency point of the public land mobile network searched when the local public land mobile network is searched, the user equipment searches the full frequency band of each system of the local public land mobile network;

and under the condition that the frequency point is not searched under the full frequency band of each system of the local public land mobile network, the user equipment searches the full frequency band of the public land mobile network searched when the local public land mobile network is searched.

9. The method of claim 4, wherein the predefined PLMN is 46015, the first standard is a fifth generation mobile communication technology, and the second standard is a fourth generation mobile communication technology.

10. The method of claim 2, wherein the obtaining the location information of the ue comprises:

the user equipment acquires the current coordinates of the user equipment; wherein the coordinates are used to indicate a geographic location where the user equipment is currently located.

11. The method of claim 2, wherein the obtaining the location information of the ue comprises:

the user equipment carries out emergency residence to the cell which is searched currently and can access the network; wherein the accessible network corresponds to a public land mobile network;

and the user equipment determines the position information of the user equipment according to the public land mobile network of the accessible network.

12. An electronic device, comprising:

a processor;

a memory for storing the processor-executable instructions;

wherein the processor is configured to execute the instructions to cause the electronic device to perform the following:

under the condition that the electronic equipment meets a preset condition, the electronic equipment executes network searching operation; the electronic equipment stores information of a registered public land mobile network and a registered public land mobile network, and the preset condition comprises starting up or cell reselection;

the network searching operation comprises the following steps:

in the case that the local public land mobile network of the electronic device is a predefined public land mobile network, the electronic device skips a process of searching under the registered public land mobile network and searches the local public land mobile network;

under the condition that the frequency point is searched in the local public land mobile network, the electronic equipment sends registration information to network equipment corresponding to the frequency point, and the registration information is used for requesting to access the network equipment; wherein, a co-established network exists in the region or country corresponding to the predefined public land mobile network, and the network equipment providing the co-established network corresponds to a plurality of public land mobile networks;

under the condition that the electronic equipment is successfully resided in the cell of the network equipment, the service of the electronic equipment is interrupted, and when the service is requested to be recovered, the electronic equipment searches the historical residence frequency point of the first standard of the local public land mobile network;

under the condition that the frequency point is not searched under the historical residing frequency point of the first standard of the local public land mobile network, the electronic equipment searches the historical residing frequency point of the second standard of the local public land mobile network;

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network, the electronic equipment searches the full frequency band of the first standard of the local public land mobile network;

under the condition that the frequency point is not searched under the full frequency band of the first standard of the local public land mobile network, the electronic equipment searches the full frequency band of the second standard of the local public land mobile network;

under the condition that the frequency point is not searched under the full frequency band of the second standard of the local public land mobile network, the electronic equipment searches the public land mobile network searched when the local public land mobile network is searched;

and under the condition that the frequency point is searched, the electronic equipment sends registration information to the network equipment corresponding to the searched frequency point.

13. The electronic device of claim 12, wherein the processor is configured to execute the instructions to cause the electronic device to further perform the following:

the electronic equipment acquires the position information of the electronic equipment and determines that the country where the electronic equipment is located is a predefined country according to the position information.

14. The electronic device of claim 12, wherein a first operator to which a subscriber identity module of the electronic device belongs and a second operator co-deploy network equipment, and a public land mobile network of the second operator is an equivalent public land mobile network of the electronic device;

the processor is configured to execute the instructions such that the electronic device further performs the following:

and under the condition that the frequency point is not searched in the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the electronic equipment sends registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network.

15. The electronic device of claim 14, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

the electronic equipment searches a historical resident frequency point of a first system of the local public land mobile network;

under the condition that a frequency point is not searched under a historical residing frequency point of a first standard of the local public land mobile network, the electronic equipment searches a historical residing frequency point of a second standard of the local public land mobile network, the network equipment of the second standard allows the electronic equipment to be accessed in a roaming mode, and the first standard is different from the second standard;

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network and no frequency point of the equivalent public land mobile network is searched, the electronic equipment searches the full frequency band of the first standard of the local public land mobile network;

and under the condition that the frequency point is not searched under the full frequency band of the first standard of the local public land mobile network, the electronic equipment searches under the full frequency band of the second standard of the local public land mobile network.

16. The electronic device of claim 15, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the electronic equipment sends the registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network;

or, the electronic device sends the registration information to a network device corresponding to the frequency point of the equivalent public land mobile network under the condition that the frequency point is not searched in the full frequency band of the second standard of the local public land mobile network and the frequency point of the equivalent public land mobile network is searched.

17. The electronic device according to claim 14, wherein a first operator and a second operator to which a subscriber identity module used by the electronic device belongs jointly deploy network devices with a network standard of a first standard, a public land mobile network of the second operator is a forbidden public land mobile network of the electronic device in the first standard, the network devices of the second standard allow the electronic device to access in a roaming manner, and the first standard is different from the second standard;

under the condition that the frequency point is not searched in the local public land mobile network, the electronic equipment skips the process of searching the frequency point of the first standard of the local public land mobile network and searches the frequency point of the second standard of the equivalent public land mobile network; the frequency points of the first standard comprise historical residing frequency points under the first standard and frequency points in a full frequency band, and the frequency points of the second standard comprise historical residing frequency points under the second standard and frequency points in the full frequency band.

18. The electronic device of claim 17, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

under the condition that the frequency point is searched under the historical resident frequency point of the second standard, the electronic equipment sends the registration information to the network equipment corresponding to the frequency point;

or,

and under the condition that the frequency point is searched under the full frequency band of the second standard, the electronic equipment sends the registration information to the network equipment corresponding to the frequency point.

19. The electronic device of claim 12, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

under the condition that no frequency point is searched under the historical residing frequency point of each standard of the local public land mobile network, the electronic equipment searches the historical residing frequency point of the public land mobile network searched when the local public land mobile network is searched;

under the condition that no frequency point is searched under the historical resident frequency point of the public land mobile network searched when the local public land mobile network is searched, the electronic equipment searches the full frequency band of each system of the local public land mobile network;

and under the condition that the frequency point is not searched under the full frequency band of each system of the local public land mobile network, the electronic equipment searches the full frequency band of the public land mobile network searched when the local public land mobile network is searched.

20. The electronic device of claim 15, wherein the predefined public land mobile network is 46015, the first standard is a fifth generation mobile communication technology, and the second standard is a fourth generation mobile communication technology.

21. The electronic device of claim 13, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

the electronic equipment acquires the current coordinates of the electronic equipment; wherein the coordinates are used for indicating the current geographic position of the electronic equipment.

22. The electronic device of claim 13, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

the electronic equipment carries out emergency residence to the cell which is searched currently and can be accessed to the network; wherein the accessible network corresponds to a public land mobile network;

the electronic equipment determines the position information of the electronic equipment according to the public land mobile network of the accessible network.

23. A computer readable storage medium, instructions in which, when executed by a processor of an electronic device, enable the electronic device to perform the method of cell search under multiple operators of any one of claims 1 to 11.