CN112118607B - Cell switching method, terminal and base station - Google Patents
Cell switching method, terminal and base station Download PDFInfo
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- CN112118607B CN112118607B CN202011083751.6A CN202011083751A CN112118607B CN 112118607 B CN112118607 B CN 112118607B CN 202011083751 A CN202011083751 A CN 202011083751A CN 112118607 B CN112118607 B CN 112118607B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention provides a cell switching method, a terminal and a base station, relates to the field of communication, and aims to avoid the problem of disconnection caused by switching cells by the terminal in a high-speed motion state and improve user experience. The method comprises the following steps: the terminal sends a measurement report to the source base station; the measurement report includes a signal quality of at least one cell, the at least one cell including a source cell; a source base station receives a measurement report sent by a terminal; if the source base station determines that the signal quality of the target cell meets a first strategy, switching judgment information is obtained; the switching judgment information is used for indicating the target base station to allow the terminal to access, and the target cell is a cell provided by the target base station; a source base station sends a first message to a terminal; the first message includes an identification of the target cell. A terminal receives a first message sent by a source base station; and if the terminal determines that the signal quality of the source cell and the signal quality of the target cell meet the second strategy, switching from the source cell to the target cell. The invention is used for cell switching.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a cell switching method, a terminal, and a base station.
Background
With the development of road traffic in China, the frequency of people going out through expressways and express railways is higher and higher, and the communication requirement of the terminal in a high-speed motion state is higher and higher in order to meet the communication service requirement of the terminal in the high-speed motion state. Since the terminal may move from one cell to another cell and then from another cell to the next cell in a short time in a high-speed moving state, the terminal frequently switches the cells. Therefore, when the terminal is in a high-speed motion state and frequently switches cells, the terminal may leave the coverage area of the cell source cell to be switched when the cell switching is not completed, so that the terminal cannot receive a signaling sent by the source cell, the cell switching of the terminal fails, a terminal drop occurs, and user experience is affected.
Disclosure of Invention
The embodiment of the invention provides a cell switching method, a terminal and a base station, which are used for cell switching of the terminal in a high-speed motion state, can avoid the problem of disconnection caused by cell switching of the terminal in the high-speed motion state, and improve user experience.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a cell handover method is provided, including: the terminal sends a measurement report to a source base station; the measurement report includes a signal quality of at least one cell, the at least one cell including a source cell; a terminal receives a first message sent by a source base station; the first message includes an identification of the target cell; and if the terminal determines that the signal quality of the source cell and the signal quality of the target cell meet the second strategy, switching from the source cell to the target cell.
In a second aspect, a cell handover method is provided, including: a source base station receives a measurement report sent by a terminal; the measurement report comprises a signal quality of the at least one cell; if the source base station determines that the signal quality of the target cell meets a first strategy, switching judgment information is obtained; the switching judgment information is used for indicating the target base station to allow the terminal to access, and the target cell is a cell provided by the target base station; a source base station sends a first message to a terminal; the first message includes an identification of the target cell.
In a third aspect, a terminal is provided, including: a sending module, configured to send a measurement report to a source base station; the measurement report includes a signal quality of at least one cell, the at least one cell including a source cell; a receiving module, configured to receive a first message sent by a source base station; the first message includes an identification of the target cell; and the switching module is used for switching from the source cell to the target cell when the signal quality of the source cell and the signal quality of the target cell are determined to meet the second strategy.
In a fourth aspect, a base station is provided, comprising: the receiving module is used for receiving a measurement report sent by a terminal; the measurement report comprises a signal quality of the at least one cell; the switching judgment module is used for acquiring switching judgment information when the signal quality of the target cell received by the receiving module meets a first strategy; the switching judgment information is used for indicating the target base station to allow the terminal to access, and the target cell is a cell provided by the target base station; the sending module is used for sending a first message to the terminal; the first message includes an identification of the target cell.
In a fifth aspect, a terminal is provided, including: a memory, a processor, a bus, and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the terminal is operating, the processor executes the computer-executable instructions stored by the memory to cause the terminal to perform the cell handover method as provided by the first aspect.
In a sixth aspect, a computer-readable storage medium is provided, comprising: the computer executes instructions which, when executed on the computer, cause the computer to perform the cell handover method as provided in the first aspect.
In a seventh aspect, a base station is provided, including: a memory, a processor, a bus, and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the base station is operating, the processor executes the computer-executable instructions stored by the memory to cause the base station to perform the cell handover method as provided by the second aspect.
In an eighth aspect, there is provided a computer-readable storage medium comprising: the computer executes instructions which, when executed on the computer, cause the computer to perform the cell handover method as provided by the second aspect.
The cell switching method provided by the embodiment of the invention comprises the following steps: the terminal sends a measurement report to a source base station; the measurement report includes a signal quality of at least one cell, the at least one cell including a source cell; a source base station receives a measurement report sent by a terminal; if the source base station determines that the signal quality of the target cell meets a first strategy, switching judgment information is obtained; the switching judgment information is used for indicating the target base station to allow the terminal to access, and the target cell is a cell provided by the target base station; a source base station sends a first message to a terminal; the first message includes an identification of the target cell. A terminal receives a first message sent by a source base station; and if the terminal determines that the signal quality of the source cell and the signal quality of the target cell meet the second strategy, switching from the source cell to the target cell. In the cell switching method provided by the embodiment of the invention, after determining that the signal quality of a target cell meets a first strategy according to a measurement report, a source base station starts a cell switching judgment process and acquires switching judgment information from the target base station so as to judge whether the target base station allows a terminal to access the target cell; when the source base station determines that the target base station allows the terminal to access, the source base station informs the terminal that the target base station allows the terminal to access through a first message, and at the moment, the terminal can continuously measure the signal quality of the source cell and the signal quality of the target cell but does not access the target cell; and when the signal quality of the source cell and the signal quality of the target cell meet the second strategy, the terminal is switched from the source cell to the target cell. Compared with the prior art, the cell switching method provided by the embodiment of the invention can be divided into a switching preparation stage and a switching implementation stage, and information of a target cell is acquired in the switching preparation stage; in the switching implementation stage, the source cell is directly switched to the target cell, and a plurality of signaling does not need to be transmitted among the terminal, the source base station and the target base station, so that the signaling overhead used in cell switching is effectively reduced, the cell switching speed is increased, and the problem of disconnection caused by cell switching of the terminal in a high-speed motion state can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic deployment diagram of a specific type of base station according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a cell handover method in the prior art according to an embodiment of the present invention;
fig. 3 is a first flowchart illustrating a cell handover method according to an embodiment of the present invention;
fig. 4 is a second flowchart illustrating a cell handover method according to an embodiment of the present invention;
fig. 5 is a third flowchart illustrating a cell handover method according to an embodiment of the present invention;
fig. 6 is a fourth schematic flowchart of a cell handover method according to an embodiment of the present invention;
fig. 7 is a fifth flowchart illustrating a cell handover method according to an embodiment of the present invention;
fig. 8 is a first schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 10 is a first schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of another terminal according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of another base station according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "such as" in an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the terms "first", "second", and the like are used to distinguish the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the terms "first", "second", and the like are not used to limit the quantity and the execution sequence.
The terminal can move along a highway or an expressway on a fixed line, and base stations constructed around the highway or the expressway are usually fixed, so that the terminal can perform communication service by accessing cells provided by the base stations around the highway or the expressway. As shown in fig. 1, the base stations may be fixedly constructed around the highway or the highway, and the cells provided by the base stations may be linearly distributed along the highway or the highway.
In the existing cell switching method, when a terminal is located on a highway or a highway, the terminal is connected with a cell provided by only one base station, as shown in fig. 1, if the terminal is connected to a first cell, cell switching occurs when the terminal moves to the edge of the first cell, and the terminal is switched from the first cell to a second cell; when the terminal moves to the edge of the second cell, cell switching occurs again, and the terminal is switched from the second cell to the third cell. The specific flow of cell handover may be as shown in fig. 2:
s101, the source base station sends a Radio Resource Control (RRC) connection reconfiguration message to the terminal.
Specifically, the source base station may set the measurement configuration of the terminal through a Radio Resource Control (RRC) connection reconfiguration message. Here, the measurement configuration may be to configure the measurement type of the terminal, so that the terminal reports the measurement report to the source base station according to the measurement type. According to the configuration of the measurement type, the terminal can report the measurement report periodically or based on the measurement report of the event.
It should be noted that the terminal time may include an A1 event-A5 event, for example, the A1 event may be that the inter-frequency measurement is stopped when the signal quality of the source cell to which the terminal is connected is higher than a certain threshold. Similarly, the A2 event-A5 event may also indicate different measurement types, and the measurement reporting based on the event is the same as the setting in the prior art, and is not described herein again.
S102, the terminal sends RRC connection reconfiguration completion information to the source base station.
Specifically, after the terminal completes the measurement configuration, an RRC connection reconfiguration complete message may be sent to the source base station to indicate that the terminal has completed the measurement configuration.
S103, the terminal sends a measurement report to the source base station.
Wherein the measurement report comprises an identity of at least one cell and its corresponding signal quality.
Specifically, the terminal may measure the signal quality of the neighboring cell according to the measurement configuration, generate a measurement report, and report the measurement report to the source base station.
And S104, the source base station judges whether to switch the cell according to the switching strategy.
And S105, if the source base station determines to switch the cell, sending a switching request message to the target base station.
And S106, if the target base station allows the terminal to access, sending a switching request response message to the source base station.
Specifically, the handover strategy may be that the signal quality of the source cell is weaker than that of the target cell, or may be other strategies. When the source base station determines that the signal quality of the source cell is weaker than that of the target cell, the terminal can be determined to be capable of cell switching, and the source cell sends a switching request message to the target base station to request to access the terminal to the target cell. And when the target base station allows the terminal to access, returning a switching request response message to the source base station, and indicating the target base station to allow the terminal to access the target cell.
The target cell may be any one of the peripheral cells measured by the terminal, and the target base station is a base station corresponding to the target cell. When the target base station allows the terminal to access, resources such as bearer resources and air interface resources required by the terminal for transmitting data can be pre-allocated to the terminal.
S107, the source base station sends RRC connection reconfiguration information to the terminal.
S108, the terminal sends RRC connection reconfiguration completion information to the target base station.
Specifically, after determining that the target base station allows the terminal to access, the source base station may send an RRC connection reconfiguration message to the terminal again, and instruct the terminal to switch to the target cell; after the terminal completes cell switching, it may send an RRC connection reconfiguration complete message to the target base station, indicating that cell switching is complete, and the target base station starts to transmit service data for the terminal.
It should be noted that the source base station may be the first base station shown in fig. 1, and the target base station may be the second base station shown in fig. 1. Of course, the source base station and the target base station may be other base stations shown in fig. 1, but the cells provided by the source base station and the target base station may perform cell switching.
Based on the cell switching method, when the terminal is switched at the edge of the cell, because the terminal moves at a high speed, signaling interaction between the first base station and the second base station is not completed, and the terminal leaves the coverage area of the first cell, the terminal cannot receive the signaling of the first cell, and further cell switching failure is caused, and the terminal is disconnected, which affects user experience.
In order to avoid the problem that the terminal is disconnected due to the failure of frequently switching the cell in the high-speed motion state, an embodiment of the present invention provides a cell switching method, as shown in fig. 3, including:
s201, the terminal sends a measurement report to the source base station.
Wherein the measurement report includes a signal quality of at least one cell including the source cell.
Specifically, in the embodiment of the present invention, that the terminal is in a high-speed movement state means that the terminal moves at a high speed on an expressway or an expressway. The terminal can measure the signal quality of the surrounding cells according to the measurement configuration, generate a measurement report, and send the measurement report to the source base station. Here, the peripheral cell means a cell covering the terminal.
The signal quality of the cell may be a Reference Signal Receiving Power (RSRP) of the cell, or a signal to interference plus noise ratio (SINR), which is not limited in the embodiment of the present invention.
It should be noted that the measurement configuration is the same as the measurement configuration in step S101, and is not described herein again.
S202, the source base station receives the measurement report sent by the terminal.
S203, if the source base station determines that the signal quality of the target cell meets the first strategy, the switching judgment information is obtained.
The handover decision information is used to indicate the target base station to allow the terminal to access, and the target cell is a cell provided by the target base station. The source cell is adjacent to the target cell, and the terminal can be switched from the source cell to the target cell.
In particular, the first policy here may be that the signal quality of the target cell is higher than a first threshold value in a first time period, and the first time period and the first threshold value may be set by those skilled in the art as needed. After the source base station determines that the signal quality of the target cell meets the first strategy, the source base station can acquire switching judgment information from the target base station, so that whether the terminal can be switched from the source cell to the target cell is judged.
For example, the source base station may be the first base station shown in fig. 1, the target base station may be the second base station shown in fig. 1, the source cell may be the first cell shown in fig. 1, and the target cell may be the second cell shown in fig. 1.
Optionally, as shown in fig. 4, step S203 may include:
s2031, the source base station determines that the signal quality of the target cell meets a first strategy.
S2032, the source base station sends a second message to the target base station.
Wherein the second message is used for requesting the target base station to switch the cell.
Specifically, the second message may be a handover request message or other newly added signaling messages, which is not limited in this embodiment of the present invention. The source base station can request the target base station to access the target cell for the terminal through the second message for resource admission, and corresponding air interface resources are distributed for the terminal after the resource admission is successful.
S2033, the source base station receives the first response message sent by the target base station.
The first response message is used for indicating the target base station to allow the terminal to access the target cell.
Specifically, the first response message may be a handover request response message, or may be another newly added signaling message, which is not limited in this embodiment of the present invention. After the target base station allows the terminal to access the target cell, a first response message may be returned to the source base station.
It should be noted that the handover decision information may be information carried in the first response message, and indicate that the target base station allows the terminal to access the target cell.
S204, the source base station sends a first message to the terminal.
Wherein the first message comprises an identification of the target cell.
Specifically, the first message may be an RRC connection reconfiguration message, or may be another newly added signaling message, which is not limited in the embodiment of the present invention. After determining that the target base station allows the terminal to access the target cell, the source base station may send the identifier of the target cell to the terminal through a first message, and notify the terminal of the cell to be switched.
S205, the terminal receives a first message sent by the source base station.
S206, if the terminal determines that the signal quality of the source cell and the signal quality of the target cell meet the second strategy, switching from the source cell to the target cell.
Specifically, the second policy here may be that the difference between the signal quality of the target cell and the signal quality of the source cell in the second time period is greater than or equal to a second threshold, and the second time period and the second threshold may be set by those skilled in the art as needed.
After the signal quality of the source cell and the signal quality of the target cell satisfy the second policy, the terminal may switch from the source cell to the target cell, and the target cell starts to transmit service data for the terminal.
The first time period may be the same as or different from the second time period.
In the cell switching method provided by the embodiment of the invention, after determining that the signal quality of a target cell meets a first strategy according to a measurement report, a source base station starts a cell switching judgment process and acquires switching judgment information from the target base station so as to judge whether the target base station allows a terminal to access the target cell; when the source base station determines that the target base station allows the terminal to access, the source base station informs the terminal that the target base station allows the terminal to access through a first message, and at the moment, the terminal can continuously measure the signal quality of the source cell and the signal quality of the target cell but does not access the target cell; the signaling such as the measurement report and the first message is the preparation process of cell handover provided by the embodiment of the present invention. In the implementation process of cell switching, when the signal quality of the source cell and the signal quality of the target cell meet the second strategy, the terminal can be directly switched from the source cell to the target cell, so that the signaling overhead during cell switching is reduced, the cell switching speed is increased, and the problem of disconnection caused by cell switching of the terminal in a high-speed motion state can be solved.
Optionally, the source base station stores a list of base stations of a specific type. As shown in fig. 5, after step S202, the method further includes:
S202A, if the source base station determines that the base station corresponding to the first cell is the base station of the specific type according to the base station list of the specific type, determining that the base station corresponding to the first cell is the target base station and the first cell is the target cell.
The first cell is any one of at least one cell, and the first cell is different from the source cell.
Specifically, the specific type of base station herein refers to a base station deployed along a highway or a highway railway for providing a communication service to a terminal on the highway or the highway railway. When a mobile operator deploys base stations for a highway or a highway, a specific type base station list can be issued to the specific type base stations through a core network, the specific type base station list can include identifications of all the specific type base stations, and the source base station and the target base station are both the specific type base stations.
Since the highway or the highway line may pass through the surrounding locations of the villages and towns and the cities, when measuring the signal quality of the surrounding cells, the terminal may measure the signal quality of not only the cell provided by a specific type of base station, but also the cell provided by other types of base stations (such as the base stations providing communication services for the terminals in the villages and towns). The cell handover of the terminal in the high-speed motion state according to the embodiment of the present invention generally refers to cell handover when the terminal moves at a high speed on an expressway or an expressway, so that when the terminal reports signal quality of a plurality of cells through a measurement report, the source base station needs to determine a base station corresponding to at least one cell, and if the base station corresponding to the first cell is a specific type base station, the first cell is determined to be a target cell, and the base station corresponding to the first cell is determined to be a target base station.
It should be noted that, because the specific type of base station is deployed around the highway or the expressway as shown in fig. 1, the cell measured by the terminal may only include one target cell provided by the specific type of base station, except that the source cell is a cell provided by the specific type of base station, and therefore the source cell may determine the target cell and the target base station from the measurement report. The first cell in this step is different from the first cell shown in fig. 1, and when the source base station is the second cell shown in fig. 1, the first cell in this step may be the third cell shown in fig. 1; when the source base station is the third cell shown in fig. 1, the first cell in this step may be the fourth cell shown in fig. 1. In the embodiment of the present invention, a terminal may move from a first cell to an nth cell shown in fig. 1, where N is a positive integer.
Optionally, as shown in fig. 6, after step S205, the method further includes:
S205A, the terminal measures the signal quality of the source cell and the signal quality of the target cell.
Specifically, after the terminal determines the target cell through the first message, it only needs to measure the signal quality of the source cell and the signal quality of the target cell, and it is no longer necessary to measure the signal quality of other cells covering the terminal.
After the target cell is determined, the terminal only measures the signal quality of the source cell and the signal quality of the target cell, so that the electric quantity can be saved for the terminal.
Optionally, as shown in fig. 7, before step S201, the method further includes:
s301, the source base station sends a third message to the terminal.
S302, the terminal sends a second response message to the source base station.
Specifically, the third message may be an RRC connection reconfiguration message, and the second response message may be an RRC connection reconfiguration complete message. The process of steps S301-S302 is the same as the process of steps S101-S102, and is not described herein again.
As shown in fig. 7, after step S206, the method further includes:
s207, the terminal sends a fourth message to the target base station.
Specifically, the fourth message may be an RRC connection reconfiguration complete message, which is used to indicate that the cell handover is complete.
Optionally, after the terminal is switched from the source cell to the target cell, the source base station may release resources, such as air interface resources, occupied by the terminal.
Optionally, because the cell switching method provided in the embodiment of the present invention is directed to cell switching when the terminal is located on an expressway or an expressway, the terminal may determine whether to start the cell switching method provided in the embodiment of the present invention according to the following two ways:
firstly, after the terminal enters the expressway or the expressway, the terminal user switches the cell switching method to the cell switching method provided by the embodiment of the invention through the built-in switching function of the terminal. Specifically, the method requires the cooperation of a terminal manufacturer and a mobile operator, the terminal manufacturer can add a cell switching function in the terminal, and when a terminal user starts the function, the terminal sends a preset message to a core network to instruct the terminal to start the cell switching method provided by the embodiment of the invention. After receiving the preset message, the core network may instruct the source base station to switch the cell for the terminal by using the cell switching method provided in the embodiment of the present invention. The preset message may be an existing RRC signaling message or an additional signaling message, which is not limited in the embodiment of the present invention.
The core network judges whether to start the cell switching method provided by the embodiment of the invention according to the moving speed of the terminal and the base station where the terminal resides. If the core network determines that the moving speed of the terminal is greater than the third threshold value and the base station where the terminal recently resides is the specific type base station, it is determined that the terminal is located on a highway or a high-speed railway, and the cell switching method provided by the embodiment of the invention can be started. After the core network starts the cell switching method provided by the embodiment of the invention, the core network can send messages to the source base station and the terminal to indicate the terminal and the source base station to start the cell switching method provided by the embodiment of the invention.
The cell switching method provided by the embodiment of the invention comprises the following steps: the terminal sends a measurement report to a source base station; the measurement report includes a signal quality of at least one cell, the at least one cell including a source cell; a source base station receives a measurement report sent by a terminal; if the source base station determines that the signal quality of the target cell meets a first strategy, acquiring switching judgment information; the switching judgment information is used for indicating the target base station to allow the terminal to access, and the target cell is a cell provided by the target base station; a source base station sends a first message to a terminal; the first message includes an identification of the target cell. A terminal receives a first message sent by a source base station; and if the terminal determines that the signal quality of the source cell and the signal quality of the target cell meet the second strategy, switching from the source cell to the target cell. In the cell switching method provided by the embodiment of the invention, after determining that the signal quality of a target cell meets a first strategy according to a measurement report, a source base station starts a cell switching judgment process, and acquires switching judgment information from the target base station, so as to judge whether the target base station allows a terminal to access the target cell; when the source base station determines that the target base station allows the terminal to access, the source base station informs the terminal that the target base station allows the terminal to access through a first message, and at the moment, the terminal can continuously measure the signal quality of the source cell and the signal quality of the target cell but does not access the target cell; and when the signal quality of the source cell and the signal quality of the target cell meet the second strategy, the terminal is switched from the source cell to the target cell. Compared with the prior art, the cell switching method provided by the embodiment of the invention can be divided into a switching preparation stage and a switching implementation stage, and information of a target cell is acquired in the switching preparation stage; in the switching implementation stage, the source cell is directly switched to the target cell, and a plurality of signaling does not need to be transmitted among the terminal, the source base station and the target base station, so that the signaling overhead used in cell switching is effectively reduced, the cell switching speed is increased, and the problem of disconnection caused by cell switching of the terminal in a high-speed motion state can be avoided.
As shown in fig. 8, an embodiment of the present invention provides a terminal 40, including:
a sending module 401, configured to send a measurement report to a source base station; the measurement report includes a signal quality of at least one cell, including the source cell.
A receiving module 402, configured to receive a first message sent by a source base station; the first message includes an identification of the target cell.
A handover module 403, configured to handover from the source cell to the target cell when it is determined that the signal quality of the source cell and the signal quality of the target cell satisfy the second policy.
Optionally, as shown in fig. 9, the terminal 40 further includes:
a measuring module 404, configured to measure the signal quality of the source cell and the signal quality of the target cell.
As shown in fig. 10, an embodiment of the present invention provides a base station 50, including:
a receiving module 501, configured to receive a measurement report sent by a terminal; the measurement report includes a signal quality of the at least one cell.
A handover decision module 502, configured to obtain handover decision information when it is determined that the signal quality of the target cell received by the receiving module 501 meets the first policy; the switching judgment information is used for indicating the target base station to allow the terminal to access, and the target cell is a cell provided by the target base station.
A sending module 503, configured to send a first message to a terminal; the first message includes an identification of the target cell.
Optionally, the base station 50 stores a list of base stations of a specific type; the base station 50 also includes a processing module 504 as shown in fig. 11.
When the processing module 504 determines that the base station corresponding to the first cell is the specific type base station according to the specific type base station list, it is determined that the base station corresponding to the first cell is the target base station and the first cell is the target cell; the first cell is any one of the at least one cell, and the first cell is different from the source cell.
Optionally, the handover decision module 502 is specifically configured to:
sending a second message to the target base station; the second message is used for requesting the target base station to switch the cell; receiving a first response message sent by a target base station; the first response message is used for indicating the target base station to allow the terminal to access the target cell.
The terminal and the base station provided by the embodiment of the invention comprise: the terminal sends a measurement report to a source base station; the measurement report includes a signal quality of at least one cell, the at least one cell including a source cell; a source base station receives a measurement report sent by a terminal; if the source base station determines that the signal quality of the target cell meets a first strategy, acquiring switching judgment information; the switching judgment information is used for indicating the target base station to allow the terminal to access, and the target cell is a cell provided by the target base station; a source base station sends a first message to a terminal; the first message includes an identification of the target cell. A terminal receives a first message sent by a source base station; and if the terminal determines that the signal quality of the source cell and the signal quality of the target cell meet the second strategy, switching from the source cell to the target cell. In the cell switching method provided by the embodiment of the invention, after determining that the signal quality of a target cell meets a first strategy according to a measurement report, a source base station starts a cell switching judgment process and acquires switching judgment information from the target base station so as to judge whether the target base station allows a terminal to access the target cell; when the source base station determines that the target base station allows the terminal to access, the source base station informs the terminal that the target base station allows the terminal to access through a first message, and at the moment, the terminal can continuously measure the signal quality of the source cell and the signal quality of the target cell but does not access the target cell; and when the signal quality of the source cell and the signal quality of the target cell meet the second strategy, the terminal is switched from the source cell to the target cell. Compared with the prior art, the cell switching method provided by the embodiment of the invention can be divided into a switching preparation stage and a switching implementation stage, and information of a target cell is acquired in the switching preparation stage; in the switching implementation stage, the source cell is directly switched to the target cell, and a plurality of signaling does not need to be transmitted among the terminal, the source base station and the target base station, so that the signaling overhead used in cell switching is effectively reduced, the cell switching speed is increased, and the problem of disconnection caused by cell switching of the terminal in a high-speed motion state can be avoided.
As shown in fig. 12, an embodiment of the present invention further provides another terminal, which includes a memory 61, a processor 62, a bus 63, and a communication interface 64; the memory 61 is used for storing computer execution instructions, and the processor 62 is connected with the memory 61 through a bus 63; when the terminal is operating, the processor 62 executes the computer-executable instructions stored by the memory 61 to cause the terminal to perform the cell handover method as provided in the above-described embodiments.
In a particular implementation, processors 62 (62-1 and 62-2) may comprise one or more CPUs, such as CPU0 and CPU1 shown in FIG. 12, for example, as an embodiment. And as an example, the terminal may include a plurality of processors 62, such as processor 62-1 and processor 62-2 shown in fig. 12. Each of the processors 62 may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). Processor 62 may refer herein to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).
The memory 61 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory 61 may be separate and coupled to the processor 62 via a bus 63. The memory 61 may also be integrated with the processor 62.
In a specific implementation, the memory 61 is used for storing data in the present application and computer-executable instructions corresponding to software programs for executing the present application. The processor 62 may perform various functions of the terminal by running or executing software programs stored in the memory 61 and calling data stored in the memory 61.
The communication interface 64 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as a control system, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc. The communication interface 64 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.
The bus 63 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an extended ISA (enhanced industry standard architecture) bus, or the like. The bus 63 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a computer execution instruction, and when the computer execution instruction runs on a computer, the computer is enabled to execute the cell handover method provided in the foregoing embodiment.
The embodiment of the present invention further provides a computer program, where the computer program may be directly loaded into a memory and contains a software code, and the computer program is loaded and executed by a computer, so as to implement the cell handover method provided in the foregoing embodiment.
As shown in fig. 13, the embodiment of the present invention further provides another base station, which includes a memory 71, a processor 72, a bus 73, and a communication interface 74; the memory 71 is used for storing computer execution instructions, and the processor 72 is connected with the memory 71 through a bus 73; when the base station is operating, the processor 72 executes computer-executable instructions stored by the memory 71 to cause the base station to perform the cell handover method provided in the above-described embodiments.
In particular implementations, processor 72 (72-1 and 72-2) may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 13, as one embodiment. And as an example, the base station may include multiple processors 72, such as processor 72-1 and processor 72-2 shown in fig. 13. Each of the processors 72 may be a single-Core Processor (CPU) or a multi-Core Processor (CPU). Processor 72 may refer herein to one or more devices, circuits, and/or processing cores that process data (e.g., computer program instructions).
The memory 71 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 71 may be self-contained and coupled to the processor 72 via a bus 73. The memory 71 may also be integrated with the processor 72.
In particular implementations, memory 71 is used to store data and computer-executable instructions corresponding to software programs for implementing the present application. The processor 72 may perform various functions of the base station by running or executing software programs stored in the memory 71 and invoking data stored in the memory 71.
The communication interface 74 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as a control system, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), etc. The communication interface 74 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.
The bus 73 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an extended ISA (enhanced industry standard architecture) bus, or the like. The bus 73 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 13, but this is not intended to represent only one bus or type of bus.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a computer execution instruction, and when the computer execution instruction runs on a computer, the computer is enabled to execute the cell handover method provided in the foregoing embodiment.
The embodiment of the present invention further provides a computer program, where the computer program may be directly loaded into a memory and contains a software code, and the computer program is loaded and executed by a computer, so as to implement the cell handover method provided in the foregoing embodiment.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
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 apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical function division, and there may be other division ways in actual implementation. For example, various elements or components may be combined or may be integrated in another device, or some features may be omitted, or not implemented. 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. 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, may be located in one place, or may be distributed to 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 invention 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 may be implemented in the form of hardware, or may also be implemented in the 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, or portions thereof, which substantially contribute to the prior art, or all or portions thereof, may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions for enabling 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 method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (14)
1. A method of cell handover, comprising:
the terminal sends a measurement report to a source base station; the measurement report includes a signal quality of at least one cell, the at least one cell including a source cell;
the source base station stores a specific type base station list, and if the source base station determines that a base station corresponding to a first cell is the specific type base station according to the specific type base station list, the source base station determines that the base station corresponding to the first cell is a target base station and the first cell is the target cell; the first cell is any one of at least one cell, and the first cell is different from the source cell;
the specific type base station is a base station deployed along a highway or a high-speed railway and is used for providing communication service for terminals on the highway or the high-speed railway;
the terminal receives a first message sent by the source base station; the first message comprises an identification of a target cell;
if the terminal determines that the signal quality of the source cell and the signal quality of the target cell meet a second strategy, switching from the source cell to the target cell;
the method further comprises the following steps:
whether the user is a user moving on a high-speed railway or a high-speed highway at a high speed is determined according to the following two ways:
after a terminal enters a highway or a highway railway, a cell switching function is arranged in the terminal, and when a terminal user starts the cell switching function, the terminal sends a preset message to a core network to indicate the terminal and a source base station to start the cell switching method;
the core network judges whether to start the cell switching method according to the moving speed of the terminal and a base station where the terminal resides; if the core network determines that the moving speed of the terminal is greater than a third threshold value and the base station where the terminal recently resides is the specific type base station, determining that the terminal is located on a highway or a high-speed railway, and starting the cell switching method; after the core network starts the cell switching method, sending a message to the source base station and the terminal to indicate the terminal and the source base station to start the cell switching method.
2. The cell switching method according to claim 1, wherein after the terminal receives the first message sent by the source base station, the method further comprises:
the terminal measures the signal quality of the source cell and the signal quality of the target cell.
3. A method for cell handover, comprising:
a source base station receives a measurement report sent by a terminal; the measurement report comprises a signal quality of at least one cell;
the source base station stores a specific type base station list, and if the source base station determines that a base station corresponding to a first cell is a specific type base station according to the specific type base station list, the source base station determines that the base station corresponding to the first cell is a target base station and the first cell is a target cell; the first cell is any one of at least one cell, and the first cell is different from a source cell;
the specific type base station is a base station deployed along a highway or a high-speed railway and is used for providing communication service for terminals on the highway or the high-speed railway;
if the source base station determines that the signal quality of the target cell meets a first strategy, switching judgment information is obtained; the switching judgment information is used for indicating a target base station to allow the terminal to access, and the target cell is a cell provided by the target base station;
the source base station sends a first message to the terminal; the first message comprises an identification of the target cell;
the method further comprises the following steps:
whether the user is a user moving on a high-speed railway or a high-speed highway at a high speed is determined according to the following two ways:
firstly, after a terminal enters a highway or a high-speed railway, a cell switching function is arranged in the terminal, and when a terminal user starts the cell switching function, the terminal sends a preset message to a core network to indicate the terminal and a source base station to start the cell switching method;
the core network judges whether to start the cell switching method according to the moving speed of the terminal and a base station where the terminal resides; if the core network determines that the moving speed of the terminal is greater than a third threshold value and the base station where the terminal recently resides is the specific type base station, determining that the terminal is located on a highway or a high-speed railway, and starting the cell switching method; and after the core network starts the cell switching method, sending a message to the source base station and the terminal to indicate the terminal and the source base station to start the cell switching method.
4. The cell switching method according to claim 3, wherein the source base station stores a list of base stations of a specific type; after the source base station receives the measurement report sent by the terminal, the method further includes:
if the source base station determines that the base station corresponding to the first cell is the base station of the specific type according to the base station list of the specific type, determining that the base station corresponding to the first cell is the target base station and the first cell is the target cell; the first cell is any one of the at least one cell, and the first cell is different from a source cell.
5. The cell switching method according to claim 4, wherein said obtaining switching decision information comprises:
the source base station sends a second message to the target base station; the second message is used for requesting the target base station to switch the cell;
the source base station receives a first response message sent by the target base station; the first response message is used for indicating the target base station to allow the terminal to access the target cell.
6. A terminal, comprising:
a sending module, configured to send a measurement report to a source base station; the measurement report includes a signal quality of at least one cell, the at least one cell including a source cell; the source base station stores a specific type base station list, and if the source base station determines that a base station corresponding to a first cell is the specific type base station according to the specific type base station list, the source base station determines that the base station corresponding to the first cell is a target base station and the first cell is the target cell; the first cell is any one of at least one cell, and the first cell is different from the source cell;
the specific type base station is a base station deployed along a highway or a high-speed railway and is used for providing communication service for terminals on the highway or the high-speed railway;
a receiving module, configured to receive a first message sent by the source base station; the first message comprises an identification of a target cell;
a handover module configured to handover from the source cell to the target cell upon determining that the signal quality of the source cell and the signal quality of the target cell satisfy a second policy;
the sending module is further specifically configured to:
whether the user is a user moving on a high-speed railway or a high-speed highway at a high speed is determined according to the following two ways:
firstly, after a terminal enters a highway or a high-speed railway, a cell switching function is arranged in the terminal, when a terminal user starts the cell switching function, the terminal sends a preset message to a core network to instruct the terminal and a source base station to start the cell switching method as claimed in claim 1;
the core network judges whether to start the cell switching method according to the moving speed of the terminal and a base station where the terminal resides; if the core network determines that the moving speed of the terminal is greater than a third threshold value and the base station where the terminal recently resides is the specific type base station, determining that the terminal is located on a highway or a high-speed railway, and starting the cell switching method; and after the core network starts the cell switching method, sending a message to the source base station and the terminal to indicate the terminal and the source base station to start the cell switching method.
7. The terminal of claim 6, further comprising:
a measuring module for measuring the signal quality of the source cell and the signal quality of the target cell.
8. A base station, comprising:
the receiving module is used for receiving a measurement report sent by a terminal; the measurement report comprises a signal quality of at least one cell; a source base station stores a specific type base station list, and if the source base station determines that a base station corresponding to a first cell is a specific type base station according to the specific type base station list, the source base station determines that the base station corresponding to the first cell is a target base station and the first cell is a target cell; the first cell is any one of at least one cell, and the first cell is different from a source cell;
the specific type base station is a base station deployed along a highway or a high-speed railway and is used for providing communication service for terminals on the highway or the high-speed railway;
the switching judgment module is used for acquiring switching judgment information when the signal quality of the target cell received by the receiving module meets a first strategy; the switching judgment information is used for indicating a target base station to allow the terminal to access, and the target cell is a cell provided by the target base station;
a sending module, configured to send a first message to the terminal; the first message includes an identification of the target cell;
the sending module is further specifically configured to:
whether the user is a user moving on a high-speed railway or a high-speed highway at a high speed is determined according to the following two ways:
firstly, after a terminal enters a highway or a highway railway, a cell switching function is arranged in the terminal, and when a terminal user starts the cell switching function, the terminal sends a preset message to a core network to instruct the terminal and a source base station to start the cell switching method as claimed in claim 3;
the core network judges whether to start the cell switching method according to the moving speed of the terminal and a base station where the terminal resides; if the core network determines that the moving speed of the terminal is greater than a third threshold value and the base station where the terminal recently resides is the specific type base station, determining that the terminal is located on a highway or a high-speed railway, and starting the cell switching method; and after the core network starts the cell switching method, sending a message to the source base station and the terminal to indicate the terminal and the source base station to start the cell switching method.
9. The base station of claim 8, wherein the base station stores a list of base stations of a specific type; the base station further comprises a processing module;
when the processing module determines that the base station corresponding to the first cell is the base station of the specific type according to the base station list of the specific type, determining that the base station corresponding to the first cell is the target base station and the first cell is the target cell; the first cell is any one of the at least one cell, and the first cell is different from a source cell.
10. The base station of claim 9, wherein the handover decision module is specifically configured to:
sending a second message to the target base station; the second message is used for requesting the target base station to switch the cell;
receiving a first response message sent by the target base station; the first response message is used for indicating the target base station to allow the terminal to access the target cell.
11. A terminal comprising a memory, a processor, a bus, and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through the bus; the processor executes the computer-executable instructions stored by the memory when the terminal is operating to cause the terminal to perform the cell handover method of any of claims 1-2.
12. A computer-readable storage medium comprising computer-executable instructions that, when executed on a computer, cause the computer to perform the cell handover method of any one of claims 1-2.
13. A base station comprising a memory, a processor, a bus and a communication interface; the memory is used for storing computer execution instructions, and the processor is connected with the memory through the bus; the processor executes the computer-executable instructions stored by the memory when the base station is operating to cause the base station to perform the cell handover method of any of claims 3-5.
14. A computer-readable storage medium comprising computer-executable instructions that, when executed on a computer, cause the computer to perform the cell handover method of any one of claims 3 to 5.
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| CN112672390B (en) * | 2020-12-28 | 2023-11-10 | 京信网络***股份有限公司 | RRC (radio resource control) connection reconfiguration message transmission method, device and communication equipment |
| CN113516149B (en) * | 2021-03-26 | 2022-03-29 | 苏州振畅智能科技有限公司 | 5G cell switching method based on machine learning |
| CN113438703B (en) * | 2021-08-04 | 2022-12-02 | 中国联合网络通信集团有限公司 | Cell measurement control method and core network equipment |
| CN113766557A (en) * | 2021-09-01 | 2021-12-07 | 深圳市日海飞信信息***技术有限公司 | Method and device for monitoring cell signal quality, base station and storage medium |
| CN114051253B (en) * | 2021-10-20 | 2023-11-21 | 中国联合网络通信集团有限公司 | QoE (quality of experience) measurement method and device |
| CN113965969A (en) * | 2021-11-17 | 2022-01-21 | 中国电信股份有限公司 | Cell switching method, device, base station and communication system |
| CN114980290B (en) * | 2022-07-14 | 2023-11-14 | 中国电信股份有限公司 | Cell energy saving method, device, electronic equipment and computer readable storage medium |
| CN115426667B (en) * | 2022-11-06 | 2023-03-24 | 荣耀终端有限公司 | Processing method and device for switching exception and storage medium |
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