CN113950108A

CN113950108A - Cell reselection method, device, terminal and network node

Info

Publication number: CN113950108A
Application number: CN202010683120.1A
Authority: CN
Inventors: 范江胜
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2022-01-18
Anticipated expiration: 2040-07-15
Also published as: WO2022012524A1

Abstract

The invention provides a cell reselection method, a cell reselection device, a terminal and a network node, wherein the cell reselection method comprises the following steps: receiving first preset information sent by a first network node; determining a target reselection cell according to the reference information; the reference information comprises first preset information and/or second preset information; the first preset information includes: the method comprises the steps that identification information of a frequency point set generated by a first network node and a slice type supported by each frequency point in the frequency point set is generated; the second preset information includes: and the terminal access layer selects or reselects related preset slice type identification information from the cell acquired by the terminal non-access layer. According to the scheme, the identification information of the slice type supported by the frequency point can be obtained in advance, so that the target cell selected by the terminal can be ensured to meet the service requirement of the terminal, the terminal can select the target cell suitable for the service according to different slice requirements, and the continuity of the terminal slicing service is ensured; and the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, and the service delay is reduced.

Description

Cell reselection method, device, terminal and network node

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a cell reselection method, apparatus, terminal, and network node.

Background

At present, the application of slices on a terminal side is performed by adopting a principle of registering first and then initiating a service, the types of slices supported by different frequency points on a RAN (radio access network) side may be differentiated due to different deployments of operators, but in the current protocol, a cell reselection behavior on the terminal side can only determine a target cell according to frequency point priority information Configured on the network side and cell signal strength, even if the Allowed NSSAI information registered on the terminal is considered by the special frequency point priority Configured on the terminal by the network side, the terminal cannot know in advance which slice types (Configured NSSAIs) Configured on the terminal are supported by the selected target cell, and if the target cell selected by the terminal just does not support the slices prepared for use by the terminal, the service of the terminal will be interrupted or spend more time to be reselected to the cell supporting the slice service of the terminal.

Disclosure of Invention

The invention aims to provide a cell reselection method, a cell reselection device, a terminal and a network node, so as to solve the problems of poor service continuity and serious service delay of a cell reselection scheme in the prior art.

In order to solve the foregoing technical problem, an embodiment of the present invention provides a cell reselection method, which is applied to a terminal, and includes:

receiving first preset information sent by a first network node;

determining a target reselection cell according to the reference information;

the reference information comprises the first preset information and/or second preset information;

the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained;

the second preset information includes: and the access layer of the terminal selects or reselects related preset slice type identification information from the cell acquired by the non-access layer of the terminal.

Optionally, the determining a target reselection cell according to the reference information includes:

acquiring a frequency point with a priority level higher than that of a current service frequency point in the frequency point set as a first type frequency point according to the reference information, and taking the rest frequency points except the first type frequency point in the frequency point set as second type frequency points;

measuring the first type frequency point according to a preset period, and taking the cell corresponding to the first type frequency point as a target reselection cell under the condition that the signal quality parameter value of the cell corresponding to the first type frequency point meets reselection criteria;

And for the second type frequency point, under the condition that the signal quality parameter value of the cell corresponding to the current service frequency point is lower than a first threshold value, starting measurement of the second type frequency point, and under the condition that the signal quality parameter value of the cell corresponding to the second type frequency point meets a reselection criterion, taking the cell corresponding to the second type frequency point as a target reselection cell.

Optionally, the meeting the reselection criterion includes at least one of:

determining that the first type frequency point meets a reselection criterion under the condition that the signal quality parameter value of the cell corresponding to the first type frequency point is greater than or equal to a second threshold value;

determining that the second type frequency point meets a reselection criterion under the conditions that the signal quality parameter value of the cell corresponding to the second type frequency point is greater than or equal to a third threshold, the signal quality parameter value of the cell corresponding to the current service frequency point is less than or equal to a fourth threshold, and the maintaining time length reaches a first time length; alternatively, the first and second electrodes may be,

and under the condition that the difference value between the signal quality parameter value of the cell corresponding to the second type frequency point and the signal quality parameter value of the cell corresponding to the current service frequency point reaches a fifth threshold value and the maintaining time length reaches a second time length, determining that the second type frequency point meets the reselection criterion.

Optionally, the obtaining, according to the reference information, a frequency point with a priority level higher than that of a current service frequency point in the frequency point set as a first type frequency point includes:

determining the height between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point according to the reference information;

and acquiring the first type frequency point according to the determination result.

Optionally, a frequency point identical to the current service frequency point exists in the frequency point set, and the priority level of the current service frequency point is identical to that of the identical frequency point; alternatively, the first and second electrodes may be,

and the frequency point set does not have the same frequency point as the current service frequency point, and the priority level of the current service frequency point is lower than that of any frequency point in the frequency point set.

Optionally, the first preset information further includes: frequency point priority information corresponding to each frequency point in the frequency point set configured by the first network node; and/or the presence of a gas in the gas,

the second preset information further includes: and type priority information corresponding to the preset slice type identification information.

Optionally, the determining, according to the reference information, a height between a priority level corresponding to each frequency point in the frequency point set and a priority level of a current service frequency point includes:

Determining that the priority level of the frequency point is lower than or equal to the priority level of the current service frequency point under the condition that the identification information of all slice types supported by the frequency point is contained in the identification information of all slice types supported by the current service frequency point; alternatively, the first and second electrodes may be,

determining that the priority level of the frequency point is higher than or equal to the priority level of the current service frequency point under the condition that the identification information of all slice types supported by the frequency point comprises the identification information of all slice types supported by the current service frequency point; alternatively, the first and second electrodes may be,

determining the priority level of the frequency point and the priority level of the current service frequency point according to the first intersection and the second intersection under the condition that the identification information of all the slice types supported by the frequency point and the identification information of all the slice types supported by the current service frequency point have partial intersection or no intersection;

the first intersection is the intersection between the identification information of all the slice types supported by the frequency point and the preset slice type identification information, and the second intersection is the intersection between the identification information of all the slice types supported by the current service frequency point and the preset slice type identification information.

Optionally, under the condition that the first network node does not configure the slice type supported by the frequency point, the number of elements of the first intersection is 0; and/or the presence of a gas in the gas,

when the number of the slice types supported by the current service frequency point is obtained to be 0 or the slice types supported by the current service frequency point are not obtained, the number of the elements of the second intersection is 0; and/or the presence of a gas in the gas,

and under the condition that the second preset information is not acquired or the acquired second preset information is empty, the number of elements of the first intersection and the second intersection is 0.

Optionally, the determining, according to the first intersection and the second intersection, the height between the priority level of the frequency point and the priority level of the current service frequency point includes:

determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the number of the elements of the first intersection is larger than that of the elements of the second intersection;

determining that the priority level of the frequency point is lower than that of the current service frequency point under the condition that the number of the elements of the first intersection is smaller than that of the elements of the second intersection;

determining that the priority level of the frequency point is equal to the priority level of the current service frequency point under the condition that the number of the elements of the first intersection is equal to the number of the elements of the second intersection and the number of the elements is not 0;

Under the condition that the number of elements of the first intersection and the second intersection is 0, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the frequency point priority information; or determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point.

Obtaining the type priority level of each slice type supported by each frequency point in the frequency point set according to the preset slice type identification information, the type priority level information, the frequency point set and the identification information of the slice type supported by each frequency point in the frequency point set;

and determining the height between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point according to the type priority level.

Optionally, the obtaining, according to the preset slice type identifier information, the type priority information, the frequency point set, and the identifier information of the slice type supported by each frequency point in the frequency point set, the type priority of each slice type supported by each frequency point in the frequency point set includes:

under the condition that identification information of a first slice type is the same as second identification information in the preset slice type identification information, determining that the type priority level of the first slice type is the same as the type priority level corresponding to the second identification information, and obtaining the type priority level of the first slice type according to the second identification information and the type priority level information; alternatively, the first and second electrodes may be,

Determining that the type priority level of the first slice type is a preset priority level lower than the type priority level of each slice type corresponding to the preset slice type identification information under the condition that the identification information of the first slice type does not belong to the preset slice type identification information;

wherein the first slice type is any slice type supported by the frequency bins.

Optionally, the determining, according to the type priority, the height between the priority corresponding to each frequency point in the frequency point set and the priority of the current service frequency point includes:

determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the type priority level of at least one slice type in all slice types supported by the frequency point is higher than the highest type priority level corresponding to all slice types supported by the frequency point of the current service cell; alternatively, the first and second electrodes may be,

under the condition that the highest type priority level corresponding to all slice types supported by the frequency point is the same as the highest type priority level corresponding to all slices supported by the frequency point of the current service cell, comparing the highest type priority level corresponding to all slice types supported by the frequency point with the highest type priority level corresponding to all slice types supported by the frequency point of the current service cell, and determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the comparison result; alternatively, the first and second electrodes may be,

Under the condition that the highest type priority corresponding to all slice types supported by the frequency point is the same as the highest type priority corresponding to all slices supported by the frequency point of the current service cell, determining the height between the priority of the frequency point and the priority of the current service frequency point according to the frequency point priority information; alternatively, the first and second electrodes may be,

under the condition that the highest type priority level corresponding to all slice types supported by the frequency point is the same as the highest type priority level corresponding to all slices supported by the current service cell frequency point, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point; alternatively, the first and second electrodes may be,

and under the condition that the highest type priority level corresponding to all slice types supported by the frequency point is lower than the lowest type priority level corresponding to all slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is lower than the priority level of the current service frequency point.

Optionally, the determining, according to the comparison result, the height between the priority level of the frequency point and the priority level of the current service frequency point includes:

Determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the comparison result indicates that the priority level of the next highest type corresponding to all slice types supported by the frequency point is higher than that of the next highest type corresponding to all slice types supported by the frequency point of the current service cell;

under the condition that the comparison result indicates that the priority level of the next highest type corresponding to all the slice types supported by the frequency point is lower than the priority level of the next highest type corresponding to all the slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is lower than the priority level of the current service frequency point;

under the condition that the comparison result indicates that the priority levels of the next highest types corresponding to all the slice types supported by the frequency point are the same as the priority levels of the next highest types corresponding to all the slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is equal to the priority level of the current service frequency point; or, under the condition that the comparison result indicates that the priority levels of the next highest types corresponding to all the slice types supported by the frequency point are the same as the priority levels of the next highest types corresponding to all the slice types supported by the frequency point of the current service cell, executing at least one preset operation until the priority levels of the types corresponding to the frequency point and the priority levels corresponding to the frequency point of the current service cell are compared, or confirming that the priority level of the frequency point is equal to the priority level of the current service frequency point;

The preset operation comprises the steps of comparing the type priority of the nth bit in the type priorities corresponding to all the slice types supported by the frequency point with the type priority of the nth bit in the type priorities corresponding to all the slices supported by the current service frequency point; n is an integer greater than 2.

Optionally, when the number of the target reselected cells is at least two, after determining the target reselected cell according to the reference information, the method further includes:

selecting one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a first preset rule;

wherein the first preset rule comprises at least one of the following rules:

the first type frequency point and the second type frequency point exist in the frequency points corresponding to the at least two target reselection cells, and under the condition that the number of cells contained in the first type frequency point is 1, the only cell contained in the first type frequency point is used as a final target reselection cell;

the first type frequency point and the second type frequency point exist in the frequency points corresponding to the at least two target reselection cells, the number of the first type frequency points is at least one, and one cell is selected from the cells contained in the at least one first type frequency point as a final target reselection cell according to a second preset rule under the condition that the total number of the cells contained in the at least one first type frequency point is at least two;

And under the condition that only the first type frequency point or the second type frequency point exists in the frequency points corresponding to the at least two target reselection cells, selecting one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a second preset rule.

Optionally, the second preset rule includes at least one of the following rules:

acquiring the number of intersection elements between identification information of all slice types supported by each frequency point in preset frequency points and the identification information of the preset slice types, and taking the target reselection cell corresponding to the frequency point corresponding to the intersection element number with the largest numerical value as a final target reselection cell;

acquiring the frequency point with the largest total number of all slice types supported by each frequency point in preset frequency points, and taking the target reselection cell corresponding to the acquired frequency point as a final target reselection cell;

acquiring a frequency point with the highest priority in the frequency point priority information in preset frequency points, and taking the target reselection cell corresponding to the acquired frequency point as a final target reselection cell;

acquiring the number of beams of which the beam signal quality parameter values respectively corresponding to the at least two target reselection cells are greater than or equal to a sixth threshold value, and taking the target reselection cell corresponding to the number of beams with the largest numerical value as a final target reselection cell;

Acquiring the target reselection cell with the highest cell signal quality parameter value as a final target reselection cell;

the preset frequency points refer to frequency points respectively corresponding to the at least two target reselection cells.

Optionally, the frequency point set and identification information of the slice type supported by each frequency point in the frequency point set are generated by the first network node according to preset information;

wherein the preset information comprises at least one of the following information:

allowed network slice selection assistance identification Allowed NSSAI information in terminal context information stored by the first network node;

default network slice selection auxiliary identifier Default NSSAI information in the terminal context information stored by the first network node;

configured network slice selection auxiliary identification Configured NSSAI information in terminal context information stored by the first network node;

the first network node stores the frequency point priority parameter information in the terminal context information;

frequency point set information locally maintained by the first network node, wherein the frequency point set information comprises same-frequency point set information and different-frequency point set information;

And the identification information of the slice type supported by each frequency point in the frequency point set locally maintained by the first network node.

Optionally, the frequency point in the frequency point set is a dedicated frequency point configured by the first network node to the terminal, or a common frequency point broadcasted by the system information of the first network node.

Optionally, the receiving the first preset information sent by the first network node includes:

receiving the first preset information broadcast by a first network node through a cell system message; alternatively, the first and second electrodes may be,

receiving first preset information sent by a first network node through a special signaling;

wherein the information carried by the dedicated signaling comprises at least one of the following information:

configuring a special frequency point set for the terminal and identification information of slice types supported by each frequency point in the special frequency point set;

configuring a public frequency point set of the terminal and identification information of slice types supported by each frequency point in the public frequency point set;

configuring the effective timer duration configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set;

Configuring the effective timer duration configuration information of a public frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the public frequency point set;

configuring the effective region configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set;

and configuring the effective region configuration information of the identification information of the slice type supported by each frequency point in the public frequency point set and the public frequency point set configured to the terminal.

Optionally, the second preset information further includes: validity auxiliary information corresponding to the preset slice type identification information; under the condition that the validity auxiliary information is matched with the validity auxiliary information of the current service frequency point, the preset slice type identification information is in a valid state;

wherein the validity assistance information includes: public land mobile network PLMN information, tracking area TA information and/or frequency band information.

and determining a target reselection cell according to the first preset information and second preset information provided to an access layer of the terminal through a non-access layer of the terminal.

Optionally, the second preset information is preconfigured to the terminal in the non-access stratum, or the network node is configured to the non-access stratum through a non-access stratum protocol.

The embodiment of the invention also provides a cell reselection method, which is applied to a first network node and comprises the following steps:

sending first preset information to a terminal;

wherein the first preset information includes: and the identification information of the frequency point set generated by the first network node and the slice type supported by each frequency point in the frequency point set.

Optionally, the first preset information further includes: and the first network node configures the frequency point priority information corresponding to each frequency point in the frequency point set.

Optionally, the Default NSSAI information or Configured NSSAI information is obtained from the second network node through an interface protocol.

Optionally, the interface type of the interface protocol is an X2 interface, an Xn interface, an S1 interface, an NG interface, an F1 interface, or an E1 interface;

wherein the X2 interface represents a communication interface between 4G radio access network nodes; the Xn interface represents the communication interface between the nodes of the 5G radio access network; the interface of S1 represents the communication interface between 4G wireless access network node and 4G core network; the NG interface represents a communication interface between the 5G wireless access network node and the 5G core network; the F1 interface represents a communication interface between a central unit gNB-CU and a distribution unit gNB-DU in a radio access network node using a new air interface technology; the E1 interface represents a communication interface between the control plane gNB-CU-CP section among the gNB-CUs and the user plane gNB-CU-UP section among the gNB-CUs.

Optionally, the second network node is a distribution unit DU, a radio access network RAN node, a central unit control plane CU-CP, an access and mobility management function AMF, a central unit user plane CU-UP, a unified data management platform UDM, or a session management function SMF.

Optionally, the sending the first preset information to the terminal includes:

broadcasting first preset information through a cell system message; alternatively, the first and second electrodes may be,

sending first preset information to a terminal through a special signaling;

The embodiment of the invention also provides a cell reselection method, which is applied to a second network node and comprises the following steps:

and sending Default slice selection auxiliary identification Default NSSAI information or Configured slice selection auxiliary identification Configured NSSAI information of the terminal to the first network node through an interface protocol.

Optionally, the method further includes:

configuring second preset information to a non-access layer of the terminal through a non-access layer protocol;

wherein the second preset information includes: the cell of the terminal selects or reselects the relevant preset slice type identification information;

and the second network node is a mobile management function AMF, a unified data management platform UDM or a session management function SMF.

Optionally, the second preset information further includes: and type priority information corresponding to the preset slice type identification information.

Optionally, the second preset information further includes: validity auxiliary information corresponding to the preset slice type identification information;

The embodiment of the invention also provides a terminal, which comprises a memory, a processor, a transceiver and a computer program which is stored on the memory and can run on the processor; the processor implements the following steps when executing the program:

Receiving first preset information sent by a first network node through the transceiver;

determining a target reselection cell according to the reference information;

Optionally, the processor is specifically configured to:

Optionally, the meeting the reselection criterion includes at least one of:

Optionally, the processor is specifically configured to:

wherein the first slice type is any slice type supported by the frequency bins.

Optionally, the processor is specifically configured to:

Optionally, the processor is further configured to:

under the condition that the number of the target reselection cells is at least two, after the target reselection cells are determined according to reference information, selecting one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a first preset rule;

wherein the first preset rule comprises at least one of the following rules:

Optionally, the processor is specifically configured to:

receiving the first preset information broadcast by the first network node through the cell system message by using the transceiver; alternatively, the first and second electrodes may be,

receiving first preset information sent by a first network node through a special signaling by using the transceiver;

Optionally, the processor is specifically configured to:

The embodiment of the invention also provides a network node, which is a first network node and comprises a memory, a processor, a transceiver and a computer program which is stored on the memory and can run on the processor; the processor implements the following steps when executing the program:

sending first preset information to a terminal through the transceiver;

Optionally, the processor is specifically configured to:

broadcasting first preset information through a cell system message by using the transceiver; alternatively, the first and second electrodes may be,

sending first preset information to a terminal through a special signaling by using the transceiver;

The embodiment of the invention also provides a network node, which is a second network node and comprises a memory, a processor, a transceiver and a computer program which is stored on the memory and can run on the processor; the processor implements the following steps when executing the program:

and sending Default slice selection auxiliary identification Default NSSAI information or Configured slice selection auxiliary identification Configured NSSAI information of the terminal to the first network node through an interface protocol by utilizing the transceiver.

Optionally, the processor is further configured to:

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the cell reselection method on the terminal side, the first network node side, or the second network node side.

The embodiment of the invention also provides a cell reselection device, which is applied to a terminal and comprises the following steps:

the first receiving module is used for receiving first preset information sent by a first network node;

the first determining module is used for determining a target reselection cell according to the reference information;

Optionally, the first determining module includes:

the first processing submodule is used for acquiring the frequency points with the priority level higher than that of the current service frequency point in the frequency point set as a first type frequency point according to the reference information, and taking the rest frequency points except the first type frequency point in the frequency point set as a second type frequency point;

the second processing submodule is used for measuring the first type frequency point according to a preset period, and taking the cell corresponding to the first type frequency point as a target reselection cell under the condition that the signal quality parameter value of the cell corresponding to the first type frequency point meets the reselection criterion;

and the third processing submodule is used for starting the measurement of the second type frequency point under the condition that the signal quality parameter value of the cell corresponding to the current service frequency point is lower than the first threshold value for the second type frequency point, and taking the cell corresponding to the second type frequency point as a target reselection cell under the condition that the signal quality parameter value of the cell corresponding to the second type frequency point meets the reselection criterion.

Optionally, the meeting the reselection criterion includes at least one of:

Optionally, the first processing sub-module includes:

a first determining unit, configured to determine, according to the reference information, a height between a priority level corresponding to each frequency point in the frequency point set and a priority level of a current service frequency point;

and the first acquisition unit is used for acquiring the first type frequency point according to the determination result.

Optionally, the first determining unit includes:

a first determining subunit, configured to determine that the priority level of the frequency point is lower than or equal to the priority level of the current service frequency point when the identification information of all slice types supported by the frequency point includes the identification information of all slice types supported by the current service frequency point; alternatively, the first and second electrodes may be,

Optionally, the first determining unit includes:

a third determining subunit, configured to determine that the priority level of the frequency point is lower than or equal to the priority level of the current service frequency point when the identification information of all slice types supported by the frequency point includes the identification information of all slice types supported by the current service frequency point; alternatively, the first and second electrodes may be,

a fourth determining subunit, configured to determine that the priority level of the frequency point is higher than or equal to the priority level of the current service frequency point when the identification information of all slice types supported by the frequency point includes the identification information of all slice types supported by the current service frequency point; alternatively, the first and second electrodes may be,

the first processing subunit is configured to obtain, according to the preset slice type identifier information, the type priority information, the frequency point set, and identifier information of slice types supported by each frequency point in the frequency point set, a type priority level of each slice type supported by each frequency point in the frequency point set;

and the second determining subunit is used for determining the height between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point according to the type priority level.

wherein the first slice type is any slice type supported by the frequency bins.

Optionally, the method further includes:

a first selecting module, configured to select, when the number of the target reselection cells is at least two, one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a first preset rule after determining the target reselection cells according to reference information;

wherein the first preset rule comprises at least one of the following rules:

Optionally, the first receiving module includes:

the first receiving submodule is used for receiving the first preset information broadcasted by the first network node through the cell system message; alternatively, the first and second electrodes may be,

Optionally, the first determining module includes:

and the first determining submodule is used for determining a target reselection cell according to first preset information and second preset information provided to an access layer of the terminal through a non-access layer of the terminal.

The embodiment of the present invention further provides a cell reselection apparatus, applied to a first network node, including:

the first sending module is used for sending first preset information to the terminal;

Optionally, the first sending module includes:

the first sending submodule is used for broadcasting first preset information through a cell system message; alternatively, the first and second electrodes may be,

sending first preset information to a terminal through a special signaling;

The embodiment of the present invention further provides a cell reselection apparatus, applied to a second network node, including:

and a second sending module, Configured to send Default slice selection auxiliary identifier Default NSSAI information or Configured slice selection auxiliary identifier Configured NSSAI information of the terminal to the first network node through an interface protocol.

Optionally, the method further includes:

the first configuration module is used for configuring second preset information to a non-access stratum of the terminal through a non-access stratum protocol;

The technical scheme of the invention has the following beneficial effects:

in the above scheme, the cell reselection method receives first preset information sent by a first network node; determining a target reselection cell according to the reference information; the reference information comprises the first preset information and/or second preset information; the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; the second preset information includes: the access layer of the terminal selects or reselects the related preset slice type identification information from the cell acquired by the non-access layer of the terminal; the identification information of the slice type supported by the frequency point can be obtained in advance, so that the target cell selected by the terminal can be ensured to meet the service requirement of the terminal, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the terminal slicing service is ensured, and the problem that the continuity of the terminal slicing service cannot be ensured in the target cell determined according to the priority information of the frequency point configured on the network side and the signal intensity of the cell is avoided; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

Drawings

Fig. 1 is a first flowchart illustrating a cell reselection method according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of a cell reselection method according to an embodiment of the present invention;

fig. 3 is a third flowchart illustrating a cell reselection method according to an embodiment of the present invention;

fig. 4 is a first schematic diagram illustrating a first predetermined information transmission according to an embodiment of the present invention;

fig. 5 is a second schematic diagram illustrating a first preset information transmission according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 7 is a first schematic structural diagram of a network node according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a network node structure according to an embodiment of the present invention;

fig. 9 is a first schematic structural diagram of a cell reselection device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a cell reselection device according to a second embodiment of the present invention;

fig. 11 is a third schematic structural diagram of a cell reselection device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The relevant contents are first described as follows:

slice (Slice) is a concept newly introduced by an NR (New RAT) system, and mainly aims to divide different resource management modes for different services, so that the resource management mode can be optimized according to the service type while the service isolation is increased,

Regarding NR slices:

a Network Slice is a service-oriented resource encapsulation concept, and a Network Slice is uniquely identified by NSSAI (Network Slice Selection Identity) and corresponds to a type of resource configuration. Different core networks can support different types of network slices according to requirements, and different from registration of an LTE (long term evolution) system, the method is that a terminal needs to perform registration of a slice before using the slice in a network, and the terminal can initiate a session establishment process corresponding to the slice only after the slice is successfully registered. In the slice registration process, NSSAI information (Request NSSAI) requested to be registered by the terminal is carried to an access network side through a message 5, and the terminal is restrained from registering at most 8 pieces of S-NSSAI (Single NSSAI, Single network slice selection auxiliary identification) information at a time; and the core network generates the Allowed NSSAI and the Rejected NSSAI of the terminal according to the terminal subscription information, the Request NSSAI of the terminal, the slice information supported locally and the local strategy.

The terminal may also pre-configure or obtain Configured NSSAI from the core network, the configuration being PLMN-unique, and use Default NSSAI information if a certain PLMN Configured by the terminal is not Configured with Configured NSSAI.

The NR system core network is defined, where one Slice corresponds to one S-NSSAI identifier, and one S-NSSAI identifier is composed of a Slice Type identifier SST (Slice/Service Type) and a Slice differentiation identifier SD (Slice differentiation identifier), where the Slice Type identifier SST occupies 8 bits and must appear, and the Slice differentiation identifier SD occupies 24 bits and can optionally appear.

In addition, the mobility management method for the terminals in IDLE (radio resource control IDLE RRC _ IDLE) and INACTIVE (radio resource control INACTIVE RRC _ INACTIVE) in the NR system:

although the NR system introduces an inactive state, the difference between the mobility management mode and the idle state is small, because the mobility management of the idle state and the inactive state is controlled by the terminal, the access network side can only indirectly control the mobility of the terminal by changing information such as frequency point priority and the like, the frequency point priority comprises two levels of meanings, the first type is called the special frequency point priority of the terminal, the priority is configuration information which is obtained by the terminal from the access network side from connection release information, and the configuration information is effective in a certain time; the second type is called as public frequency point priority, each cell broadcasts public frequency point priority information in own system information, and the purpose is that when the terminal has no special frequency point priority or the special frequency point priority is invalid, the terminal can continuously reselect the cell by using the public frequency point priority broadcasted by the cell.

For the dedicated frequency point priority, the NR system considers the influence of slicing compared to the LTE system, specifically, when the core network generates a frequency point priority parameter RFSP (radio access technology RAT and/or frequency point selection priority) of a single terminal, slice information (i.e., Allowed NSSAI List) of the terminal that is successfully registered is considered, the frequency point priority parameter RFSP generated after considering the slice information and the Allowed NSSAI List of the terminal are jointly used as a part of the terminal context to be transferred to the access network side by the core network side, when the access network side prepares to release the terminal, how to generate the special frequency point priority information configured to the terminal through the known terminal slice information and the stored terminal parameter RFSP is considered according to the load of the access network side, and the special frequency point priority is configured to the terminal through the connection release message.

For the priority of the public frequency point, generally speaking, the cell determines the priority size corresponding to each frequency point in the broadcasted public frequency point priority information according to the load and deployment planning of each frequency point in the region. At present, the influence of the slice correlation process on the priority of the common frequency point is not considered.

Based on the above, the present invention provides a cell reselection method for a terminal, aiming at the problems of poor service continuity and serious service delay existing in the cell reselection scheme in the prior art, as shown in fig. 1, the method includes:

step 11: receiving first preset information sent by a first network node;

step 12: determining a target reselection cell according to the reference information;

The identification information may be S-NSSAI identification information, but is not limited thereto. The number of the preset slice identification information may be one or at least two, and the preset slice identification information may be information in Allowed NSSAI information, Default NSSAI information, or Configured NSSAI information (set).

The cell reselection method provided by the embodiment of the invention receives first preset information sent by a first network node; determining a target reselection cell according to the reference information; the reference information comprises the first preset information and/or second preset information; the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; the second preset information includes: the access layer of the terminal selects or reselects the related preset slice type identification information from the cell acquired by the non-access layer of the terminal; the identification information of the slice type supported by the frequency point can be obtained in advance, so that the target cell selected by the terminal can be ensured to meet the service requirement of the terminal, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the terminal slicing service is ensured, and the problem that the continuity of the terminal slicing service cannot be ensured in the target cell determined according to the priority information of the frequency point configured on the network side and the signal intensity of the cell is avoided; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

Wherein, the determining a target reselection cell according to the reference information includes: acquiring a frequency point with a priority level higher than that of a current service frequency point in the frequency point set as a first type frequency point according to the reference information, and taking the rest frequency points except the first type frequency point in the frequency point set as second type frequency points; measuring the first type frequency point according to a preset period, and taking the cell corresponding to the first type frequency point as a target reselection cell under the condition that the signal quality parameter value of the cell corresponding to the first type frequency point meets reselection criteria; and for the second type frequency point, under the condition that the signal quality parameter value of the cell corresponding to the current service frequency point is lower than a first threshold value, starting measurement of the second type frequency point, and under the condition that the signal quality parameter value of the cell corresponding to the second type frequency point meets a reselection criterion, taking the cell corresponding to the second type frequency point as a target reselection cell.

Regarding the second type of frequency point: for a second type frequency point with the same grade as the current service node, the measurement of the second type frequency point can be started under the condition that the signal quality parameter value of the cell corresponding to the current service frequency point is lower than a first threshold value;

For a second type frequency point lower than the current service frequency point level, the measurement on the second type frequency point may be started under the condition that the signal quality parameter value of the cell corresponding to the current service frequency point is lower than a first threshold and the signal quality parameter value of the neighboring cell is higher than a seventh threshold.

The signal quality parameter value refers to at least one of an RSRP (reference signal received power) value, an RSRQ (reference signal received quality) value, and an SINR (signal to interference plus noise ratio) value.

Wherein the meeting reselection criteria comprises at least one of: determining that the first type frequency point meets a reselection criterion under the condition that the signal quality parameter value of the cell corresponding to the first type frequency point is greater than or equal to a second threshold value; determining that the second type frequency point meets a reselection criterion under the conditions that the signal quality parameter value of the cell corresponding to the second type frequency point is greater than or equal to a third threshold, the signal quality parameter value of the cell corresponding to the current service frequency point is less than or equal to a fourth threshold, and the maintaining time length reaches a first time length; or determining that the second type frequency point meets the reselection criterion under the condition that the difference value between the signal quality parameter value of the cell corresponding to the second type frequency point and the signal quality parameter value of the cell corresponding to the current service frequency point reaches a fifth threshold value and the maintaining time length reaches a second time length.

Specifically, the acquiring, according to the reference information, a frequency point with a priority level higher than that of a current service frequency point in the frequency point set as a first type frequency point includes: determining the height between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point according to the reference information; and acquiring the first type frequency point according to the determination result.

In the embodiment of the invention, the frequency point set has the same frequency point as the current service frequency point, and the priority level of the current service frequency point is consistent with that of the same frequency point; or, the frequency point set does not have the same frequency point as the current service frequency point, and the priority level of the current service frequency point is lower than that of any frequency point in the frequency point set.

Further, the first preset information further includes: frequency point priority information corresponding to each frequency point in the frequency point set configured by the first network node; and/or the second preset information further comprises: and type priority information corresponding to the preset slice type identification information.

Specifically, the determining, according to the reference information, the height between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point includes: determining that the priority level of the frequency point is lower than or equal to the priority level of the current service frequency point under the condition that the identification information of all slice types supported by the frequency point is contained in the identification information of all slice types supported by the current service frequency point; or, under the condition that the identification information of all slice types supported by the frequency point contains the identification information of all slice types supported by the current service frequency point, determining that the priority level of the frequency point is higher than or equal to the priority level of the current service frequency point; or, under the condition that a part of intersection or no intersection exists between the identification information of all the slice types supported by the frequency point and the identification information of all the slice types supported by the current service frequency point, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the first intersection and the second intersection; the first intersection is the intersection between the identification information of all the slice types supported by the frequency point and the preset slice type identification information, and the second intersection is the intersection between the identification information of all the slice types supported by the current service frequency point and the preset slice type identification information.

More specifically, under the condition that the first network node does not configure the slice type supported by the frequency point, the number of elements of the first intersection is 0; and/or, when the number of the slice types supported by the current service frequency point is obtained to be 0 or the slice types supported by the current service frequency point are not obtained, the number of the elements of the second intersection is 0; and/or the number of elements of the first intersection and the second intersection is 0 under the condition that the second preset information is not acquired (by an access layer of the terminal) or the acquired second preset information is empty.

In this embodiment of the present invention, the determining, according to the first intersection and the second intersection, the priority level of the frequency point and the priority level of the current service frequency point includes: determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the number of the elements of the first intersection is larger than that of the elements of the second intersection; determining that the priority level of the frequency point is lower than that of the current service frequency point under the condition that the number of the elements of the first intersection is smaller than that of the elements of the second intersection; determining that the priority level of the frequency point is equal to the priority level of the current service frequency point under the condition that the number of the elements of the first intersection is equal to the number of the elements of the second intersection and the number of the elements is not 0; under the condition that the number of elements of the first intersection and the second intersection is 0, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the frequency point priority information; or determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point.

Specifically, regarding "determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point," the higher the number of slice types supported by the frequency point is, the higher the priority level is.

In this embodiment of the present invention, the determining, according to the reference information, a height between a priority level corresponding to each frequency point in the frequency point set and a priority level of a current service frequency point includes: determining that the priority level of the frequency point is lower than or equal to the priority level of the current service frequency point under the condition that the identification information of all slice types supported by the frequency point is contained in the identification information of all slice types supported by the current service frequency point; or, under the condition that the identification information of all slice types supported by the frequency point contains the identification information of all slice types supported by the current service frequency point, determining that the priority level of the frequency point is higher than or equal to the priority level of the current service frequency point; or obtaining the type priority level of each slice type supported by each frequency point in the frequency point set according to the preset slice type identification information, the type priority level information, the frequency point set and the identification information of the slice type supported by each frequency point in the frequency point set; and determining the height between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point according to the type priority level.

Specifically, the obtaining of the type priority level of each slice type supported by each frequency point in the frequency point set according to the preset slice type identification information, the type priority level information, the frequency point set, and the identification information of the slice type supported by each frequency point in the frequency point set includes: under the condition that identification information of a first slice type is the same as second identification information in the preset slice type identification information, determining that the type priority level of the first slice type is the same as the type priority level corresponding to the second identification information, and obtaining the type priority level of the first slice type according to the second identification information and the type priority level information; or, in a case that the identification information of the first slice type does not belong to the preset slice type identification information, determining that the type priority level of the first slice type is a preset priority level lower than the type priority level of each slice type corresponding to the preset slice type identification information; wherein the first slice type is any slice type supported by the frequency bins.

Determining the priority level between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point according to the type priority level comprises the following steps: determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the type priority level of at least one slice type in all slice types supported by the frequency point is higher than the highest type priority level corresponding to all slice types supported by the frequency point of the current service cell; or, under the condition that the highest type priority corresponding to all slice types supported by the frequency point is the same as the highest type priority corresponding to all slices supported by the frequency point of the current serving cell (including the condition that the number of elements of the first intersection and the second intersection is 0), comparing the highest type priority corresponding to all slice types supported by the frequency point with the highest type priority corresponding to all slice types supported by the frequency point of the current serving cell, and determining the height between the priority of the frequency point and the priority of the current serving frequency point according to the comparison result; or, under the condition that the highest type priority corresponding to all slice types supported by the frequency point is the same as the highest type priority corresponding to all slices supported by the frequency point of the current service cell, determining the height between the priority of the frequency point and the priority of the current service frequency point according to the frequency point priority information; or, under the condition that the highest type priority level corresponding to all slice types supported by the frequency point is the same as the highest type priority level corresponding to all slices supported by the frequency point of the current service cell, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point; or, under the condition that the highest type priority level corresponding to all slice types supported by the frequency point is lower than the lowest type priority level corresponding to all slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is lower than the priority level of the current service frequency point.

Specifically, the determining the priority level of the frequency point and the priority level of the current service frequency point according to the comparison result includes: determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the comparison result indicates that the priority level of the next highest type corresponding to all slice types supported by the frequency point is higher than that of the next highest type corresponding to all slice types supported by the frequency point of the current service cell; under the condition that the comparison result indicates that the priority level of the next highest type corresponding to all the slice types supported by the frequency point is lower than the priority level of the next highest type corresponding to all the slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is lower than the priority level of the current service frequency point; under the condition that the comparison result indicates that the priority levels of the next highest types corresponding to all the slice types supported by the frequency point are the same as the priority levels of the next highest types corresponding to all the slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is equal to the priority level of the current service frequency point; or, under the condition that the comparison result indicates that the priority levels of the next highest types corresponding to all the slice types supported by the frequency point are the same as the priority levels of the next highest types corresponding to all the slice types supported by the frequency point of the current service cell, executing at least one preset operation until the priority levels of the types corresponding to the frequency point and the priority levels corresponding to the frequency point of the current service cell are compared, or confirming that the priority level of the frequency point is equal to the priority level of the current service frequency point; the preset operation comprises the steps of comparing the type priority of the nth bit in the type priorities corresponding to all the slice types supported by the frequency point with the type priority of the nth bit in the type priorities corresponding to all the slices supported by the current service frequency point; n is an integer greater than 2.

In this embodiment of the present invention, when the number of the target reselecting cells is at least two, after determining the target reselecting cell according to the reference information, the method further includes: selecting one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a first preset rule; wherein the first preset rule comprises at least one of the following rules: the first type frequency point and the second type frequency point exist in the frequency points corresponding to the at least two target reselection cells, and under the condition that the number of cells contained in the first type frequency point is 1, the only cell contained in the first type frequency point is used as a final target reselection cell; the first type frequency point and the second type frequency point exist in the frequency points corresponding to the at least two target reselection cells, the number of the first type frequency points is at least one, and one cell is selected from the cells contained in the at least one first type frequency point as a final target reselection cell according to a second preset rule under the condition that the total number of the cells contained in the at least one first type frequency point is at least two; and under the condition that only the first type frequency point or the second type frequency point exists in the frequency points corresponding to the at least two target reselection cells, selecting one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a second preset rule.

As illustrated herein, a frequency bin may include (or correspond to) at least two cells.

Specifically, the second preset rule includes at least one of the following rules: acquiring the number of intersection elements between identification information of all slice types supported by each frequency point in preset frequency points and the identification information of the preset slice types, and taking the target reselection cell corresponding to the frequency point corresponding to the intersection element number with the largest numerical value as a final target reselection cell; acquiring the frequency point with the largest total number of all slice types supported by each frequency point in preset frequency points, and taking the target reselection cell corresponding to the acquired frequency point as a final target reselection cell; acquiring a frequency point with the highest priority in the frequency point priority information in preset frequency points, and taking the target reselection cell corresponding to the acquired frequency point as a final target reselection cell; acquiring the number of beams of which the beam signal quality parameter values respectively corresponding to the at least two target reselection cells are greater than or equal to a sixth threshold value, and taking the target reselection cell corresponding to the number of beams with the largest numerical value as a final target reselection cell; acquiring the target reselection cell with the highest cell signal quality parameter value as a final target reselection cell; the preset frequency points refer to frequency points respectively corresponding to the at least two target reselection cells.

The implementation of the second preset rule can be embodied as the following four phases; the cell signal quality parameter value refers to at least one of an RSRP value, an RSRQ value and an SINR value; the cell beam signal quality parameter value refers to at least one of an RSRP value, an RSRQ value, and an SINR value.

In the embodiment of the invention, the frequency point set and the identification information of the slice type supported by each frequency point in the frequency point set are generated by the first network node according to preset information; wherein the preset information comprises at least one of the following information: allowed network slice selection assistance identification Allowed NSSAI information in terminal context information stored by the first network node; default network slice selection auxiliary identifier Default NSSAI information in the terminal context information stored by the first network node; configured network slice selection auxiliary identification Configured NSSAI information in terminal context information stored by the first network node; the first network node stores the frequency point priority parameter information in the terminal context information; frequency point set information locally maintained by the first network node, wherein the frequency point set information comprises same-frequency point set information and different-frequency point set information; and the identification information of the slice type supported by each frequency point in the frequency point set locally maintained by the first network node.

The information on the frequency point priority parameter may specifically be RFSP (radio access technology RAT and/or frequency point selection priority) information, but is not limited thereto.

In the embodiment of the present invention, the frequency point in the frequency point set is a dedicated frequency point configured by the first network node to the terminal, or a common frequency point of system information broadcast of the first network node.

Specifically, the receiving of the first preset information sent by the first network node includes: receiving (through an access stratum of the terminal) the first preset information broadcast by a first network node through a cell system message; or receiving first preset information sent by a first network node (by using an access stratum of the terminal) through a special signaling; wherein the information carried by the dedicated signaling comprises at least one of the following information: configuring a special frequency point set for the terminal and identification information of slice types supported by each frequency point in the special frequency point set; configuring a public frequency point set of the terminal and identification information of slice types supported by each frequency point in the public frequency point set; configuring the effective timer duration configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; configuring the effective timer duration configuration information of a public frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the public frequency point set; configuring the effective region configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; and configuring the effective region configuration information of the identification information of the slice type supported by each frequency point in the public frequency point set and the public frequency point set configured to the terminal.

Further, the second preset information further includes: validity auxiliary information corresponding to the preset slice type identification information; under the condition that the validity auxiliary information is matched with the validity auxiliary information of the current service frequency point, the preset slice type identification information is in a valid state; wherein the validity assistance information includes: public land mobile network PLMN information, tracking area TA information and/or frequency band information.

Specifically, the determining a target reselection cell according to the reference information includes: and determining a target reselection cell according to the first preset information and second preset information provided to an access layer of the terminal through a non-access layer of the terminal.

In this embodiment of the present invention, the second preset information is preconfigured to the terminal in the non-access stratum, or the network node is configured to the non-access stratum through a non-access stratum protocol.

An embodiment of the present invention further provides a cell reselection method, applied to a first network node, as shown in fig. 2, including:

step 21: sending first preset information to a terminal;

The identification information may be S-NSSAI identification information, but is not limited thereto.

The cell reselection method provided by the embodiment of the invention sends first preset information to a terminal; wherein the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; therefore, the supporting terminal can ensure that the target cell selected by the terminal meets the service requirement of the terminal by acquiring the identification information of the slice type supported by the frequency point in advance, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the slicing service of the terminal is ensured, and the problem that the continuity of the slicing service of the terminal cannot be ensured by determining the target cell according to the priority information of the frequency point configured at the network side and the signal intensity of the cell is solved; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

Wherein the first preset information further includes: and the first network node configures the frequency point priority information corresponding to each frequency point in the frequency point set.

Specifically, the frequency point set and identification information of the slice type supported by each frequency point in the frequency point set are generated by the first network node according to preset information; wherein the preset information comprises at least one of the following information: allowed network slice selection assistance identification Allowed NSSAI information in terminal context information stored by the first network node; default network slice selection auxiliary identifier Default NSSAI information in the terminal context information stored by the first network node; configured network slice selection auxiliary identification Configured NSSAI information in terminal context information stored by the first network node; the first network node stores the frequency point priority parameter information in the terminal context information; frequency point set information locally maintained by the first network node, wherein the frequency point set information comprises same-frequency point set information and different-frequency point set information; and the identification information of the slice type supported by each frequency point in the frequency point set locally maintained by the first network node.

In the embodiment of the present invention, the Default NSSAI information or the Configured NSSAI information is acquired from the second network node through an interface protocol.

Specifically, the interface type of the interface protocol is an X2 interface, an Xn interface, an S1 interface, an NG interface, an F1 interface, or an E1 interface; wherein the X2 interface represents a communication interface between 4G radio access network nodes; the Xn interface represents the communication interface between the nodes of the 5G radio access network; the interface of S1 represents the communication interface between 4G wireless access network node and 4G core network; the NG interface represents a communication interface between the 5G wireless access network node and the 5G core network; the F1 interface represents a communication interface between a central unit gNB-CU and a distribution unit gNB-DU in a radio access network node using a new air interface technology; the E1 interface represents a communication interface between the control plane gNB-CU-CP section among the gNB-CUs and the user plane gNB-CU-UP section among the gNB-CUs.

In the embodiment of the present invention, the second network node is a distribution unit DU, a radio access network RAN node, a central unit control plane CU-CP, an access and mobility management function AMF, a central unit user plane CU-UP, a unified data management platform UDM, or a session management function SMF.

Specifically, the frequency point in the frequency point set is a dedicated frequency point configured by the first network node to the terminal, or a common frequency point broadcasted by the system information of the first network node.

In this embodiment of the present invention, the sending of the first preset information to the terminal includes: broadcasting first preset information through a cell system message; or, sending first preset information to the terminal through a special signaling; wherein the information carried by the dedicated signaling comprises at least one of the following information: configuring a special frequency point set for the terminal and identification information of slice types supported by each frequency point in the special frequency point set; configuring a public frequency point set of the terminal and identification information of slice types supported by each frequency point in the public frequency point set; configuring the effective timer duration configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; configuring the effective timer duration configuration information of a public frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the public frequency point set; configuring the effective region configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; and configuring the effective region configuration information of the identification information of the slice type supported by each frequency point in the public frequency point set and the public frequency point set configured to the terminal.

An embodiment of the present invention further provides a cell reselection method, applied to a second network node, as shown in fig. 3, including:

step 31: and sending Default slice selection auxiliary identification Default NSSAI information or Configured slice selection auxiliary identification Configured NSSAI information of the terminal to the first network node through an interface protocol.

The cell reselection method provided by the embodiment of the present invention sends Default slice selection auxiliary identifier Default NSSAI information or Configured slice selection auxiliary identifier Configured NSSAI information of a terminal to a first network node through an interface protocol; the method comprises the steps that a first network node is supported to send first preset information to a terminal; wherein the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; therefore, the supporting terminal can ensure that the target cell selected by the terminal meets the service requirement of the terminal by acquiring the identification information of the slice type supported by the frequency point in advance, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the slicing service of the terminal is ensured, and the problem that the continuity of the slicing service of the terminal cannot be ensured by determining the target cell according to the priority information of the frequency point configured at the network side and the signal intensity of the cell is solved; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

Wherein the interface type of the interface protocol is an X2 interface, an Xn interface, an S1 interface, an NG interface, an F1 interface or an E1 interface; wherein the X2 interface represents a communication interface between 4G radio access network nodes; the Xn interface represents the communication interface between the nodes of the 5G radio access network; the interface of S1 represents the communication interface between 4G wireless access network node and 4G core network; the NG interface represents a communication interface between the 5G wireless access network node and the 5G core network; the F1 interface represents a communication interface between a central unit gNB-CU and a distribution unit gNB-DU in a radio access network node using a new air interface technology; the E1 interface represents a communication interface between the control plane gNB-CU-CP section among the gNB-CUs and the user plane gNB-CU-UP section among the gNB-CUs.

Further, the cell reselection method further includes: configuring second preset information to a non-access layer of the terminal through a non-access layer protocol; wherein the second preset information includes: the cell of the terminal selects or reselects the relevant preset slice type identification information; and the second network node is a mobile management function AMF, a unified data management platform UDM or a session management function SMF.

The number of the preset slice identification information may be one or at least two, and the preset slice identification information may be information in Allowed NSSAI information, Default NSSAI information, or Configured NSSAI information (set).

In this embodiment of the present invention, the second preset information further includes: and type priority information corresponding to the preset slice type identification information.

Further, the second preset information further includes: validity auxiliary information corresponding to the preset slice type identification information;

The cell reselection method provided by the embodiment of the present invention is described below with reference to multiple sides, such as a terminal, a first network node, and a second network node.

In view of the above technical problems, an embodiment of the present invention provides a cell reselection method to assist a terminal to maintain service continuity and implement service delay optimization by enabling the terminal to obtain identification information of slice types supported by frequency points in advance; this scheme can relate to specifically:

terminal side access stratum (AS layer) behavior:

1) a terminal access layer acquires first preset information sent by a first network node through cell system information or a special signaling; and selecting a proper target reselection cell by utilizing the first preset information and/or the second preset information.

Wherein the first preset information includes at least one of the following information:

a terminal access layer acquires a frequency point set generated by a first network node according to preset information through a special signaling and identification information of slice types supported by each frequency point in the frequency point set;

the terminal access layer obtains the frequency point set provided by the first network node broadcast through the cell system information and the identification information of the slice type supported by each frequency point in the frequency point set.

The first preset information may further include frequency point priority information corresponding to each frequency point in the frequency point set configured by the first network node.

The second preset information may be second preset information related to cell selection or reselection acquired by the access stratum of the terminal from a non-access stratum of the terminal;

the second preset information includes at least one of the following information:

identification information of one or more preset slice types (i.e. the preset slice type identification information); or

The method comprises the steps that identification information of one or more preset slice types and type priority information corresponding to the identification information of each preset slice type are obtained; or

PLMN information or Tracking Area (TA) information or Band (Band) information (i.e. including the above validity assistance information) corresponding to the identification information of one or more preset slice types and the identification information of the preset slice types; or

The method includes the steps of obtaining identification information of one or more preset slice types, type priority information corresponding to the identification information of each preset slice type, and PLMN information or Tracking Area (TA) information or frequency Band (Band) information corresponding to the identification information of the preset slice types.

2) The preset information in 1) comprises at least one of the following information:

the first network node stores Allowed NSSAI information in the terminal context information;

default NSSAI information in terminal context information stored by a first network node;

configuring NSSAI information in the terminal context information stored by the first network node;

frequency point priority parameter RFSP information in terminal context information stored by a first network node;

the frequency point set information locally maintained by the first network node comprises same-frequency point set information and different-frequency point set information;

identification information of slice types supported by each frequency point in a frequency point set locally maintained by a first network node;

3) before the obtaining of the first preset information in 1), the method further includes that the first network node obtains Default NSSAI or Configured NSSAI information of the terminal from the second network node through an interface protocol;

4)3) the interface may be any one of X2, Xn, S1, NG, F1 and E1 interfaces, the second network node may be any one of a DU, a second access network entity functionally identical to the first network node, CU-CP, AMF, CU-UP, UDM and SMF;

5) the frequency point set in 1) may be a dedicated frequency point set configured by a first network node to a terminal, or may be a common frequency point set broadcasted by system information of the current first network node (that is, a frequency point in the frequency point set is a dedicated frequency point configured by the first network node to the terminal, or a common frequency point broadcasted by system information of the first network node);

6) the information carried by the dedicated signaling in 1) comprises at least one of the following information:

configuring a special frequency point set for a terminal and identification information of slice types supported by each frequency point in the frequency point set;

the method comprises the steps that a public frequency point set configured for a terminal and identification information of slice types supported by all frequency points in the frequency point set are obtained;

configuring the time length configuration information of a special frequency point set configured for a terminal and the effective timer of the identification information of the slice type supported by each frequency point in the frequency point set;

Configuring the effective timer duration configuration information of a public frequency point set configured to a terminal and the identification information of the slice type supported by each frequency point in the frequency point set;

configuring the effective region configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the frequency point set;

configuring the effective region configuration information of the identification information of the slice type supported by each frequency point in a public frequency point set configured to the terminal and the frequency points in the frequency point set;

7) before selecting a suitable target reselection cell by using the first preset information and/or the second preset information in 1), determining the level between the priority of each frequency point obtained by cell system information or a dedicated signaling and the priority of the current service frequency point by using the first preset information and/or the second preset information, wherein the determination rule is as follows:

scene 1: if the second preset information includes type priority information corresponding to the preset slice type identification information, the determination rule of the height between the priority of the frequency point of each frequency point and the priority of the current service frequency point may be as follows:

firstly, if a certain type of information in identification information of a slice type supported by a frequency point generated by a first network node acquired by a terminal according to preset information is contained in second preset information related to cell selection or reselection acquired by an access layer of the terminal from a non-access layer of the terminal, the slice type uses the same priority as the same slice type in the second preset information, and frequency point priority information configured for the slice type by a network side for the slice type through cell system information or a special signaling is ignored; if the identification information of the slice type supported by a certain frequency point, which is generated by a first network node acquired by a terminal according to preset information, cannot find the corresponding type information from second preset information related to cell selection or reselection acquired by a non-access stratum of the terminal, the priority of the frequency point is set to be the lowest (lower than the priority of the slice types corresponding to all types of information in the second preset information).

If the type priority of the slice type corresponding to at least one type information (i.e. the type priority of at least one slice type exists in all slice types supported by the frequency point) in the identification information of the slice type supported by one frequency point (belonging to the frequency point set) is higher than the priority corresponding to the highest priority slice of the frequency point of the current service cell (i.e. higher than the highest type priority corresponding to all slice types supported by the frequency point of the current service cell), the priority of the frequency point is higher than the priority of the frequency point of the current cell; alternatively, the first and second electrodes may be,

if the priority corresponding to the highest priority slice in the slice information supported by a frequency point (i.e. the highest type priority level corresponding to all slice types supported by the frequency point) is the same as the priority corresponding to the highest priority slice of the current serving cell (i.e. the highest type priority level corresponding to all slices supported by the frequency point of the current serving cell), comparing the priorities corresponding to the two highest priority slices (i.e. comparing the priority levels of the next highest type corresponding to all slice types supported by the frequency point with the priority levels of the next highest type corresponding to all slice types supported by the frequency point of the current serving cell), and if the priority level of the next highest type corresponding to the next highest priority slice is higher than the priority level of the next highest type corresponding to all slice types supported by the frequency point of the current serving cell, in the case that who the priority level is higher than the priority level of the next highest type corresponding to all slice types supported by the frequency point is higher than the priority level corresponding to all slice types supported by the frequency point of the current serving cell, determining that the priority level of the frequency point is higher than that of the current service frequency point; under the condition that the priority levels of the second highest types corresponding to all the slice types supported by the frequency points are lower than the priority levels of the second highest types corresponding to all the slice types supported by the frequency points of the current service cell, determining that the priority levels of the frequency points are lower than the priority level of the current service frequency point, if the priority levels corresponding to the second highest priority slices are still the same, considering that the priority levels of the frequency points are the same or continuously comparing the priority levels corresponding to the third highest priority slice, and if the priority levels corresponding to the third highest priority slice are still the same, further comparing the priority levels corresponding to the fourth highest priority slice, and so on, until the priority levels of the frequency points are higher or the priority levels of the frequency points are declared to be the same; alternatively, the first and second electrodes may be,

If the slice information supported by a frequency point is a subset of the slice information supported by the frequency point of the current service cell (namely the identification information of all slice types supported by the frequency point is contained in the identification information of all slice types supported by the current service frequency point), the priority of the frequency point is lower than or equal to the priority of the current service frequency point; alternatively, the first and second electrodes may be,

if the slice information supported by a frequency point contains all slice information supported by the current service frequency point (the slice information supported by the current service frequency point is a subset of the slice information supported by the frequency point, and the identification information of all slice types supported by the frequency point contains the identification information of all slice types supported by the current service frequency point), the priority of the frequency point is higher than or equal to the priority of the current service frequency point; alternatively, the first and second electrodes may be,

if the priority corresponding to the highest priority slice in the slice information supported by a frequency point is lower than the priority corresponding to the lowest priority slice of the frequency point of the current service cell (namely the priority of the highest type corresponding to all the slice types supported by the frequency point is lower than the priority of the lowest type corresponding to all the slice types supported by the frequency point of the current service cell), the priority of the frequency point is lower than the priority of the current service frequency point.

If a plurality of frequency points are all the lowest frequency point priorities, the priorities among the lowest priority frequency points can be determined by the following rules:

determining the priority of the lowest priority frequency point among all the lowest priority frequency points through (special) frequency point priority information configured for the frequency point by a network side; alternatively, the first and second electrodes may be,

determining the priorities among all the lowest priority frequency points according to the number of the slice types supported on the lowest priority frequency points, wherein the more the number of the slice types supported on one lowest priority frequency point is, the higher the priority of the frequency point is;

scene 2: if the second preset information does not include type priority information corresponding to the preset slice type identification information, the determination rule of the height between the priority of the frequency point of each frequency point and the priority of the current service frequency point can be as follows:

taking an intersection of the identification information of all the slice types supported by the frequency points in the frequency point set and the identification information of the preset slice types provided in the second preset information to obtain a set called a first intersection; a set obtained by taking intersection of the identification information of all slice types supported by the associated frequency point (namely the current service frequency point) of the current service cell and the identification information of the preset slice types provided in the second preset information is called as second intersection; if the number of the slice types contained in the first intersection is larger than that contained in the first slice type set, the priority of the frequency point is higher than that of the frequency point of the service cell;

if the number of elements contained in the first intersection is equal to the number of elements contained in the second intersection, the priority of the frequency point is equal to the priority of the current service frequency point;

If the number of the element types contained in the first intersection is less than that of the elements contained in the second intersection, the priority of the frequency point is lower than that of the current service frequency point;

8) As described in 7), after determining the priority level between the frequency point priority information of each frequency point acquired through the cell system information or the dedicated signaling and the priority level of the current serving frequency point by using the first preset information and/or the second preset information, the target reselected cell selection and execution process may be completed according to the following rules:

for the frequency point with higher priority than the current service frequency point (namely the first type frequency point), the terminal can always carry out measurement, and once the terminal measures that the signal quality parameter value of the cell corresponding to the high priority frequency point is greater than or equal to a second threshold value, the terminal reselects the cell corresponding to the frequency point;

For a frequency point (namely one of the first type of frequency points) with the frequency point priority same as that of the current service frequency point, the terminal can start measurement when the signal quality parameter value of the cell corresponding to the current service frequency point is lower than a first threshold, and the terminal reselects the cell corresponding to the measured frequency point after the measurement result meets the reselection criterion;

for a frequency point (i.e. another type of the above-mentioned first type of frequency point) whose priority of the frequency point is lower than that of the current service frequency point, the terminal may start measurement when the signal quality parameter value of the cell corresponding to the current service frequency point is lower than a first threshold, and when the measurement result satisfies that the signal quality parameter value of the cell corresponding to the current service frequency point is lower than a fourth threshold and the signal quality parameter value of the cell corresponding to the low priority frequency point is higher than a third threshold, the terminal reselects to the cell corresponding to the measured frequency point.

Further, in the measurement process, if the number of the obtained target reselected cells is at least two, the terminal may determine the final target reselected cell according to the following rule:

the first stage rule: at least one of the identification information of all slice types supported by the frequency points associated with the first cell is included in the second preset information, and then the first cell is superior to the second cell in which the identification information of all slice types supported by the associated frequency points is not included in the second preset information, and the terminal can preferentially select to reselect the first cell, specifically, for example: taking the only first cell as a final target reselection cell;

And a second stage rule: if a plurality of candidate target reselection cells still exist after the first-stage rule screening (namely, the number of the first cells is at least two), a final target reselection cell can be determined according to the number of all slice types supported by the frequency points associated with each first cell, and if the number of the slice types supported by the frequency points associated with the cells is more, the performance is better, and the terminal preferentially selects the candidate target reselection cell with the larger number of the slice types supported by the associated frequency points as the final target reselection cell; for example, preferentially selecting the only candidate target reselection cell with the largest number of slice types supported by the associated frequency point as the final target reselection cell;

the third stage rule: if a plurality of candidate target reselection cells still exist after the first and second stage rules are screened, the terminal may select a candidate target reselection cell with a large number of measurable beams (i.e., beams corresponding to the cell and having a beam signal quality greater than or equal to a sixth threshold) of the cell as a final target reselection cell;

specific examples thereof are: and acquiring the number of measurable beams respectively corresponding to the candidate target reselection cells, and taking the candidate target reselection cell corresponding to the maximum number as a final target reselection cell.

The fourth phase rule: if a plurality of candidate target reselection cells still exist after the first, second and third stage rules are screened, the terminal may select the candidate target reselection cell with the best cell signal quality (i.e., the cell signal quality parameter value is the highest) as the final target reselection cell.

Terminal side non-access stratum (NAS) layer) behavior:

1) sending second preset information to a terminal access layer, wherein the second preset information comprises at least one of the following information:

2) The second preset information in 1) may be pre-configured by the system to the terminal non-access stratum, or may be obtained by the terminal non-access stratum from the second network node side through a non-access stratum message;

the first network node behavior:

1) a first network node sends first preset information to a terminal;

2) The preset information comprises at least one of the following information:

3) before sending the first preset information to the terminal, the method in 1) further includes that the first network node obtains Default NSSAI or Configured NSSAI information of the terminal from the second network node through an interface protocol;

and configuring the effective region configuration information of the identification information of the slice type supported by each frequency point in the public frequency point set configured to the terminal.

Second network node behavior:

1) the second network node sends the Default NSSAI or Configured NSSAI information of the terminal to the first network node through an interface protocol;

2)1) the interface may be any one of X2, Xn, S1, NG, F1 and E1 interfaces, the second network node may be any one of a DU, a second access network entity functionally identical to the first network node, CU-CP, AMF, CU-UP, UDM and SMF;

3) configuring second preset information related to cell selection or reselection to a terminal non-access stratum through a non-access stratum protocol, wherein the second network node can be any one of AMF, UDM and SMF;

The scheme provided by the embodiment of the invention is illustrated below.

For example, one: an example of a manner in which the first network node generates the frequency point set and the identification information of the slice type supported by each frequency point in the frequency point set is

Mode 1: the cell generates a public frequency point set of the cell and identification information of slice types supported by each frequency point in the frequency point set by using a public frequency point set acquired from a neighboring cell and/or a core network side and the identification information of the slice types supported by each frequency point in the frequency point set; namely, the frequency point set information locally maintained by the first network node and the identification information of the slice type supported by each frequency point in the frequency point set are used;

mode 2: through at least one parameter of the Default NSSAI or Configured NSSAI or Allowed NSSAI or frequency point priority parameter RFSP, the frequency point set of the cell and the identification information of the slice type supported by each frequency point in the frequency point set, which are acquired by the auxiliary mode 1, are generated into the frequency point set special for the terminal and the identification information of the slice type supported by each frequency point in the frequency point set.

Table 1 shows frequency point set information generated in mode 1 and identification information format of slice type supported by each frequency point in the frequency point set

TABLE 2 Default NSSAI or Configured NSSAI or Allowed NSSAI information format schematic of terminal

Through at least one parameter of a Default NSSAI or a Configured NSSAI or an Allowed NSSAI or a frequency point priority parameter RFSP, the frequency point set of the cell and the identification information of the slice type supported by each frequency point in the frequency point set, which are acquired by the auxiliary mode 1, are generated into a terminal-specific frequency point set and the identification information of the slice type supported by each frequency point in the frequency point set:

table 3, frequency point set dedicated to terminal generated in mode 2, and indication information format of slice type supported by each frequency point in the frequency point set

Table 3 is compared with table 1, and additionally considers at least one parameter of a Default NSSAI, a Configured NSSAI, an Allowed NSSAI, or a frequency point priority parameter RFSP, the frequency point set generated by the auxiliary update method 1, and the identification information of the slice type supported by each frequency point in the frequency point set.

Example two: method for terminal to obtain frequency point set provided by network side and identification information of slice type supported by each frequency point in the frequency point set

Mode 1: the first network node notifies the terminal of the public frequency point set obtained in the first example by the method 1 and the identification information of the slice type supported by each frequency point in the frequency point set through broadcasting the system message of the local cell, as shown in fig. 4, the method includes:

Step 41: and the first network node sends the public frequency point set and the identification information of the slice type supported by each frequency point in the frequency point set to the terminal through the cell system message.

The cell system information in fig. 4 only provides the identification information of the common frequency point set maintained by the cell and the slice type supported by each frequency point in the frequency point set.

Mode 2: the first network node sends the dedicated frequency point set and the identification information of the slice type supported by each frequency point in the frequency point set to the terminal through a dedicated signaling, as shown in fig. 5, including:

step 51: a first network node sends a special frequency point set and identification information of slice types supported by each frequency point in the frequency point set to a terminal through a special signaling;

the information carried by the dedicated signaling in this step includes at least one of the following information:

configuring a public frequency point set for a terminal and identification information of slice types supported by each frequency point in the frequency point set;

Configuring the time length configuration information of a public frequency point set configured to a terminal and the effective timer of the identification information of the slice type supported by each frequency point in the frequency point set;

configuring the effective region configuration information of the special frequency point set configured for the terminal and the identification information of the slice type supported by each frequency point in the frequency point set;

and configuring the information of the public frequency point set configured to the terminal and the effective area of the identification information of the slice type supported by each frequency point in the frequency point set.

Step 52: the terminal replies to the first network node (i.e. the terminal replies to the first network node) with a configuration success message, which may not occur.

Example three: second Preset information Format schematic

Table 4 format indication of second preset information related to cell selection or reselection acquired by the access layer of the terminal from the non-access layer of the terminal (the preset slice type identifier information is embodied as a preset slice type identifier)

The second preset information is optional, that is, the non-access stratum of the terminal may not provide the information to the access stratum; in addition, the preset slice type identifier priority information (i.e. the type priority information corresponding to the preset slice type identifier information) in the second preset information is also an optional item, that is, the non-access layer of the terminal may provide only the preset slice type identifier information but not the priority information corresponding to the preset slice type identifier to the access layer of the terminal.

M, N, O, P, Q, W, X, Y and/or Z in Table 1, Table 2, Table 3 and/or Table 4 are each a positive integer of 1 or more.

Example four: example of the determination rule of the height between each frequency point in the frequency point set sent by the network and the priority of the current service frequency point when the second preset information only contains the preset slice type identifier (i.e. the preset slice type identifier information)

Firstly, defining: the first intersection is the intersection between the identification information of all the slice types supported by the frequency point and the preset slice type identification information, and the second intersection is the intersection between the identification information of all the slice types supported by the current service frequency point and the preset slice type identification information

The second preset information is assumed to include preset slice type identification information: slice type 1 and slice type 2;

the frequency point set obtained by the terminal from the network side comprises 3 frequency points: f1, f2 and f 3.

Scenario 1: the current service frequency point is f1, and the f1, f2 and f3 slice types support the following cases:

f 1: slice type 1;

f 2: slice type 1 and slice type 2;

f 3: no slice type is provided;

the number of the second intersection elements corresponding to f1 is 1, the number of the first intersection elements corresponding to f2 is 2, the number of the first intersection elements corresponding to f3 is 0, and the rule for establishing the frequency point priority is as follows:

then the priority of the frequency point among f1, f2 and f3 is: f2> f1> f 3.

Scenario 2: the current service frequency point is f1, and the f1, f2 and f3 slice types support the following cases:

f 1: slice type 3;

f 2: slice type 3 and slice type 4;

f 3: no slice type is provided;

if the number of the second intersection elements corresponding to f1 is 0, the number of the first intersection elements corresponding to f2 is 0, and the number of the first intersection elements corresponding to f3 is 0, then the priority of each frequency point is determined according to the following rules:

provision 1: determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the frequency point priority information;

The priority level information of the frequency points in the rule 1 is provided by the network side through cell system information or dedicated signaling, and the priority levels of the frequency points among f1, f2 and f3 are determined according to the cell system information or the dedicated signaling (the provided frequency point priority level information);

or

Provision 2: and determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point.

According to the rule 2, the priority of the frequency points among f1, f2 and f3 is as follows: f2> f1> f 3; f3 does not provide for a slice type to be treated as supporting 0 slice types.

Scenario 3: and if the service frequency point is not contained in the frequency point set provided by the network side, the service frequency point has the lowest priority (lower than the frequency point priority of any frequency point in the frequency point set).

Example five: when the second preset information includes both a preset slice type identifier (i.e., the preset slice type identifier information) and priority information corresponding to the preset slice type identifier (i.e., the type priority information corresponding to the preset slice type identifier information), an example of a rule for determining the priority between each frequency point in the frequency point set and the current service frequency point is given as an example

Table 5 example of second preset information related to cell selection or reselection acquired by the access stratum of the terminal from the non-access stratum of the terminal

In table 5, it is assumed that type priority 0 is the highest priority, type priority 1 is the second, and so on;

firstly, determining the priority of each slice type supported by a frequency point according to the following rules:

wherein the first slice type is any slice type supported by the frequency bins.

The frequency point set obtained by the terminal from the network side is assumed to include 3 frequency points: f1, f2 and f 3.

f 1: slice type 1 and slice type 3;

f 2: slice type 1 and slice type 2;

f 3: slice type 1 and slice type 4;

then:

the f1 slice type priorities are: 0 and 2;

the f2 slice type priorities are: 0 and 1;

the f3 slice type priorities are: 0 and lower than priority 2;

then, determining the priority of the frequency point according to the following rules:

firstly, comparing the highest priority, and if the priority is high, the priority of the corresponding frequency point is high; if the priority of the highest frequency point is the same, the priority of the next highest slice type is seen, and the rest is done;

according to the rule, the priority of the frequency points among f1, f2 and f3 can be judged as follows: f2> f1> f 3;

it is of course also possible that the highest slice type priority is the same, not lower than the next highest slice type priority, but rather the frequency point is determined to be higher or lower as follows:

the priority level information of the frequency points in the specification 1 is provided by the network side through cell system information or special signaling, and the priority levels of the frequency points among f1, f2 and f3 are determined according to the system information or the special signaling;

Or

According to the rule of regulation 2, the frequency point priorities of f1, f2 and f3 are the same.

f 1: slice type 4 and slice type 5;

f 2: slice type 4 and slice type 6;

f 3: slice type 4, slice type 5, and slice type 6;

then:

the f1 slice type priorities are: all lower than priority 2;

the f2 slice type priorities are: all lower than priority 2;

the f3 slice type priorities are: all lower than priority 2;

the frequency point priority is determined by the scene according to the following rules:

mode 1: directly declaring that the frequency point priorities of f1, f2 and f3 are the same;

mode 2: determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the frequency point priority information;

the priority information of the frequency points in the mode 2 is provided by the network side through the cell system information or the special signaling, and the priority of the frequency points among f1, f2 and f3 is determined according to the cell system information or the special signaling;

Mode 3: and determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point.

According to the rule of 3, the priority of frequency points among f1, f2 and f3 is f3> f1 ═ f 2.

Example six: an example of a method for a terminal to select a final target reselection cell when the number of (candidate) target reselection cells is greater than or equal to 2

Stipulating: acquiring a frequency point with a priority level higher than that of a current service frequency point in the frequency point set as a first type frequency point, and taking the rest frequency points except the first type frequency point in the frequency point set as a second type frequency point;

scenario 1: one cell in the 2 target reselection cells corresponds to the first type frequency point, and one cell corresponds to the second type frequency point, so that the terminal selects the first type frequency point cell;

scenario 2: under the condition that only a first type frequency point or a second type frequency point exists in frequency points corresponding to the 2 target reselection cells, selecting one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a second preset rule;

Scenario 3: the first type frequency point and the second type frequency point exist in the frequency points corresponding to the 2 target reselection cells, the number of the first type frequency points is at least one, and one cell is selected from the cells contained in the at least one first type frequency point as a final target reselection cell according to a second preset rule under the condition that the total number of the cells contained in the at least one first type frequency point is at least two;

the second preset rule includes at least one of the following rules:

Compared with the prior art that the target cell cannot ensure the continuity of the terminal slicing service according to the frequency point priority information configured on the network side and the cell signal strength, the scheme provided by the embodiment of the invention can ensure that the target cell selected by the terminal meets the service requirement of the terminal, and the terminal can select the target cell suitable for the service according to different slicing requirements, thereby ensuring the continuity of the terminal slicing service and simultaneously reducing the secondary cell reselection process caused by the interruption of the slicing service of the terminal.

An embodiment of the present invention further provides a terminal, as shown in fig. 6, including a memory 61, a processor 62, a transceiver 63, and a computer program 64 stored on the memory 61 and operable on the processor 62; the processor 62, when executing the program, performs the following steps:

Receiving, by the transceiver 63, first preset information sent by a first network node;

determining a target reselection cell according to the reference information;

The terminal provided by the embodiment of the invention receives first preset information sent by a first network node; determining a target reselection cell according to the reference information; the reference information comprises the first preset information and/or second preset information; the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; the second preset information includes: the access layer of the terminal selects or reselects the related preset slice type identification information from the cell acquired by the non-access layer of the terminal; the identification information of the slice type supported by the frequency point can be obtained in advance, so that the target cell selected by the terminal can be ensured to meet the service requirement of the terminal, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the terminal slicing service is ensured, and the problem that the continuity of the terminal slicing service cannot be ensured in the target cell determined according to the priority information of the frequency point configured on the network side and the signal intensity of the cell is avoided; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

Specifically, the processor is specifically configured to: acquiring a frequency point with a priority level higher than that of a current service frequency point in the frequency point set as a first type frequency point according to the reference information, and taking the rest frequency points except the first type frequency point in the frequency point set as second type frequency points; measuring the first type frequency point according to a preset period, and taking the cell corresponding to the first type frequency point as a target reselection cell under the condition that the signal quality parameter value of the cell corresponding to the first type frequency point meets reselection criteria; and for the second type frequency point, under the condition that the signal quality parameter value of the cell corresponding to the current service frequency point is lower than a first threshold value, starting measurement of the second type frequency point, and under the condition that the signal quality parameter value of the cell corresponding to the second type frequency point meets a reselection criterion, taking the cell corresponding to the second type frequency point as a target reselection cell.

In an embodiment of the present invention, the processor is specifically configured to: determining the height between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point according to the reference information; and acquiring the first type frequency point according to the determination result.

Specifically, a frequency point which is the same as the current service frequency point exists in the frequency point set, and the priority level of the current service frequency point is consistent with that of the same frequency point; or, the frequency point set does not have the same frequency point as the current service frequency point, and the priority level of the current service frequency point is lower than that of any frequency point in the frequency point set.

In this embodiment of the present invention, the first preset information further includes: frequency point priority information corresponding to each frequency point in the frequency point set configured by the first network node; and/or the second preset information further comprises: and type priority information corresponding to the preset slice type identification information.

Wherein the processor is specifically configured to: determining that the priority level of the frequency point is lower than or equal to the priority level of the current service frequency point under the condition that the identification information of all slice types supported by the frequency point is contained in the identification information of all slice types supported by the current service frequency point; or, under the condition that the identification information of all slice types supported by the frequency point contains the identification information of all slice types supported by the current service frequency point, determining that the priority level of the frequency point is higher than or equal to the priority level of the current service frequency point; or, under the condition that a part of intersection or no intersection exists between the identification information of all the slice types supported by the frequency point and the identification information of all the slice types supported by the current service frequency point, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the first intersection and the second intersection; the first intersection is the intersection between the identification information of all the slice types supported by the frequency point and the preset slice type identification information, and the second intersection is the intersection between the identification information of all the slice types supported by the current service frequency point and the preset slice type identification information.

In this embodiment of the present invention, under the condition that the first network node does not configure the slice type supported by the frequency point, the number of elements of the first intersection is 0; and/or, when the number of the slice types supported by the current service frequency point is obtained to be 0 or the slice types supported by the current service frequency point are not obtained, the number of the elements of the second intersection is 0; and/or the number of elements of the first intersection and the second intersection is 0 under the condition that the second preset information is not acquired or the acquired second preset information is empty.

Specifically, the processor is specifically configured to: determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the number of the elements of the first intersection is larger than that of the elements of the second intersection; determining that the priority level of the frequency point is lower than that of the current service frequency point under the condition that the number of the elements of the first intersection is smaller than that of the elements of the second intersection; determining that the priority level of the frequency point is equal to the priority level of the current service frequency point under the condition that the number of the elements of the first intersection is equal to the number of the elements of the second intersection and the number of the elements is not 0; under the condition that the number of elements of the first intersection and the second intersection is 0, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the frequency point priority information; or determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point.

In an embodiment of the present invention, the processor is specifically configured to: determining that the priority level of the frequency point is lower than or equal to the priority level of the current service frequency point under the condition that the identification information of all slice types supported by the frequency point is contained in the identification information of all slice types supported by the current service frequency point; or, under the condition that the identification information of all slice types supported by the frequency point contains the identification information of all slice types supported by the current service frequency point, determining that the priority level of the frequency point is higher than or equal to the priority level of the current service frequency point; or obtaining the type priority level of each slice type supported by each frequency point in the frequency point set according to the preset slice type identification information, the type priority level information, the frequency point set and the identification information of the slice type supported by each frequency point in the frequency point set; and determining the height between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point according to the type priority level.

Wherein the processor is specifically configured to: under the condition that identification information of a first slice type is the same as second identification information in the preset slice type identification information, determining that the type priority level of the first slice type is the same as the type priority level corresponding to the second identification information, and obtaining the type priority level of the first slice type according to the second identification information and the type priority level information; or, in a case that the identification information of the first slice type does not belong to the preset slice type identification information, determining that the type priority level of the first slice type is a preset priority level lower than the type priority level of each slice type corresponding to the preset slice type identification information; wherein the first slice type is any slice type supported by the frequency bins.

Specifically, the processor is specifically configured to: determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the type priority level of at least one slice type in all slice types supported by the frequency point is higher than the highest type priority level corresponding to all slice types supported by the frequency point of the current service cell; or, under the condition that the highest type priority corresponding to all slice types supported by the frequency point is the same as the highest type priority corresponding to all slices supported by the frequency point of the current service cell, comparing the highest type priority corresponding to all slice types supported by the frequency point with the highest type priority corresponding to all slice types supported by the frequency point of the current service cell, and determining the height between the priority of the frequency point and the priority of the current service frequency point according to the comparison result; or, under the condition that the highest type priority corresponding to all slice types supported by the frequency point is the same as the highest type priority corresponding to all slices supported by the frequency point of the current service cell, determining the height between the priority of the frequency point and the priority of the current service frequency point according to the frequency point priority information; or, under the condition that the highest type priority level corresponding to all slice types supported by the frequency point is the same as the highest type priority level corresponding to all slices supported by the frequency point of the current service cell, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point; or, under the condition that the highest type priority level corresponding to all slice types supported by the frequency point is lower than the lowest type priority level corresponding to all slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is lower than the priority level of the current service frequency point.

In an embodiment of the present invention, the processor is specifically configured to: determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the comparison result indicates that the priority level of the next highest type corresponding to all slice types supported by the frequency point is higher than that of the next highest type corresponding to all slice types supported by the frequency point of the current service cell; under the condition that the comparison result indicates that the priority level of the next highest type corresponding to all the slice types supported by the frequency point is lower than the priority level of the next highest type corresponding to all the slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is lower than the priority level of the current service frequency point; under the condition that the comparison result indicates that the priority levels of the next highest types corresponding to all the slice types supported by the frequency point are the same as the priority levels of the next highest types corresponding to all the slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is equal to the priority level of the current service frequency point; or, under the condition that the comparison result indicates that the priority levels of the next highest types corresponding to all the slice types supported by the frequency point are the same as the priority levels of the next highest types corresponding to all the slice types supported by the frequency point of the current service cell, executing at least one preset operation until the priority levels of the types corresponding to the frequency point and the priority levels corresponding to the frequency point of the current service cell are compared, or confirming that the priority level of the frequency point is equal to the priority level of the current service frequency point; the preset operation comprises the steps of comparing the type priority of the nth bit in the type priorities corresponding to all the slice types supported by the frequency point with the type priority of the nth bit in the type priorities corresponding to all the slices supported by the current service frequency point; n is an integer greater than 2.

Further, the processor is further configured to: under the condition that the number of the target reselection cells is at least two, after the target reselection cells are determined according to reference information, selecting one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a first preset rule; wherein the first preset rule comprises at least one of the following rules: the first type frequency point and the second type frequency point exist in the frequency points corresponding to the at least two target reselection cells, and under the condition that the number of cells contained in the first type frequency point is 1, the only cell contained in the first type frequency point is used as a final target reselection cell; the first type frequency point and the second type frequency point exist in the frequency points corresponding to the at least two target reselection cells, the number of the first type frequency points is at least one, and one cell is selected from the cells contained in the at least one first type frequency point as a final target reselection cell according to a second preset rule under the condition that the total number of the cells contained in the at least one first type frequency point is at least two; and under the condition that only the first type frequency point or the second type frequency point exists in the frequency points corresponding to the at least two target reselection cells, selecting one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a second preset rule.

Wherein the second preset rule comprises at least one of the following rules: acquiring the number of intersection elements between identification information of all slice types supported by each frequency point in preset frequency points and the identification information of the preset slice types, and taking the target reselection cell corresponding to the frequency point corresponding to the intersection element number with the largest numerical value as a final target reselection cell; acquiring the frequency point with the largest total number of all slice types supported by each frequency point in preset frequency points, and taking the target reselection cell corresponding to the acquired frequency point as a final target reselection cell; acquiring a frequency point with the highest priority in the frequency point priority information in preset frequency points, and taking the target reselection cell corresponding to the acquired frequency point as a final target reselection cell; acquiring the number of beams of which the beam signal quality parameter values respectively corresponding to the at least two target reselection cells are greater than or equal to a sixth threshold value, and taking the target reselection cell corresponding to the number of beams with the largest numerical value as a final target reselection cell; acquiring the target reselection cell with the highest cell signal quality parameter value as a final target reselection cell; the preset frequency points refer to frequency points respectively corresponding to the at least two target reselection cells.

The frequency points in the frequency point set are dedicated frequency points configured by the first network node to the terminal, or public frequency points broadcasted by system information of the first network node.

Specifically, the processor is specifically configured to: receiving the first preset information broadcast by the first network node through the cell system message by using the transceiver; or, receiving first preset information sent by a first network node through a special signaling by using the transceiver; wherein the information carried by the dedicated signaling comprises at least one of the following information: configuring a special frequency point set for the terminal and identification information of slice types supported by each frequency point in the special frequency point set; configuring a public frequency point set of the terminal and identification information of slice types supported by each frequency point in the public frequency point set; configuring the effective timer duration configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; configuring the effective timer duration configuration information of a public frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the public frequency point set; configuring the effective region configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; and configuring the effective region configuration information of the identification information of the slice type supported by each frequency point in the public frequency point set and the public frequency point set configured to the terminal.

Specifically, the processor is specifically configured to: and determining a target reselection cell according to the first preset information and second preset information provided to an access layer of the terminal through a non-access layer of the terminal.

The implementation embodiments of the cell reselection method at the terminal side are all applicable to the embodiment of the terminal, and the same technical effects can be achieved.

An embodiment of the present invention further provides a network node, where the network node is a first network node, as shown in fig. 7, and includes a memory 71, a processor 72, a transceiver 73, and a computer program 74 stored in the memory 71 and operable on the processor 72; the processor 72, when executing the program, performs the steps of:

Sending first preset information to the terminal through the transceiver 73;

The network node provided by the embodiment of the invention sends first preset information to a terminal; wherein the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; therefore, the supporting terminal can ensure that the target cell selected by the terminal meets the service requirement of the terminal by acquiring the identification information of the slice type supported by the frequency point in advance, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the slicing service of the terminal is ensured, and the problem that the continuity of the slicing service of the terminal cannot be ensured by determining the target cell according to the priority information of the frequency point configured at the network side and the signal intensity of the cell is solved; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

Further, the first preset information further includes: and the first network node configures the frequency point priority information corresponding to each frequency point in the frequency point set.

Wherein the Default NSSAI information or the Configured NSSAI information is obtained from the second network node through an interface protocol.

In the embodiment of the invention, the interface type of the interface protocol is an X2 interface, an Xn interface, an S1 interface, an NG interface, an F1 interface or an E1 interface; wherein the X2 interface represents a communication interface between 4G radio access network nodes; the Xn interface represents the communication interface between the nodes of the 5G radio access network; the interface of S1 represents the communication interface between 4G wireless access network node and 4G core network; the NG interface represents a communication interface between the 5G wireless access network node and the 5G core network; the F1 interface represents a communication interface between a central unit gNB-CU and a distribution unit gNB-DU in a radio access network node using a new air interface technology; the E1 interface represents a communication interface between the control plane gNB-CU-CP section among the gNB-CUs and the user plane gNB-CU-UP section among the gNB-CUs.

Specifically, the processor is specifically configured to: broadcasting first preset information through a cell system message by using the transceiver; or, the transceiver is used for sending first preset information to the terminal through a special signaling; wherein the information carried by the dedicated signaling comprises at least one of the following information: configuring a special frequency point set for the terminal and identification information of slice types supported by each frequency point in the special frequency point set; configuring a public frequency point set of the terminal and identification information of slice types supported by each frequency point in the public frequency point set; configuring the effective timer duration configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; configuring the effective timer duration configuration information of a public frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the public frequency point set; configuring the effective region configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; and configuring the effective region configuration information of the identification information of the slice type supported by each frequency point in the public frequency point set and the public frequency point set configured to the terminal.

The implementation embodiments of the cell reselection method on the first network node side are all applicable to the embodiment of the network node, and the same technical effects can be achieved correspondingly.

An embodiment of the present invention further provides a network node, where the network node is a second network node, as shown in fig. 8, and includes a memory 81, a processor 82, a transceiver 83, and a computer program 84 stored in the memory 81 and operable on the processor 82; the processor 82, when executing the program, performs the steps of:

by means of the transceiver 83, the Default slice selection auxiliary identifier Default NSSAI information or the Configured slice selection auxiliary identifier Configured NSSAI information of the terminal is sent to the first network node through the interface protocol.

The network node provided by the embodiment of the invention sends Default slice selection auxiliary identification Default NSSAI information or Configured slice selection auxiliary identification Configured NSSAI information of a terminal to a first network node through an interface protocol; the method comprises the steps that a first network node is supported to send first preset information to a terminal; wherein the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; therefore, the supporting terminal can ensure that the target cell selected by the terminal meets the service requirement of the terminal by acquiring the identification information of the slice type supported by the frequency point in advance, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the slicing service of the terminal is ensured, and the problem that the continuity of the slicing service of the terminal cannot be ensured by determining the target cell according to the priority information of the frequency point configured at the network side and the signal intensity of the cell is solved; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

Further, the processor is further configured to: configuring second preset information to a non-access layer of the terminal through a non-access layer protocol; wherein the second preset information includes: the cell of the terminal selects or reselects the relevant preset slice type identification information; and the second network node is a mobile management function AMF, a unified data management platform UDM or a session management function SMF.

Wherein the second preset information further includes: and type priority information corresponding to the preset slice type identification information.

In this embodiment of the present invention, the second preset information further includes: validity auxiliary information corresponding to the preset slice type identification information; wherein the validity assistance information includes: public land mobile network PLMN information, tracking area TA information and/or frequency band information.

The implementation embodiments of the cell reselection method on the second network node side are all applicable to the embodiment of the network node, and the same technical effects can be achieved correspondingly.

The implementation embodiments of the cell reselection method at the terminal side, the first network node side, or the second network node side are all applicable to the embodiment of the computer-readable storage medium, and the same technical effects can be achieved.

An embodiment of the present invention further provides a cell reselection apparatus, which is applied to a terminal, and as shown in fig. 9, the apparatus includes:

A first receiving module 91, configured to receive first preset information sent by a first network node;

a first determining module 92, configured to determine a target reselected cell according to the reference information;

The cell reselection device provided by the embodiment of the invention receives first preset information sent by a first network node; determining a target reselection cell according to the reference information; the reference information comprises the first preset information and/or second preset information; the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; the second preset information includes: the access layer of the terminal selects or reselects the related preset slice type identification information from the cell acquired by the non-access layer of the terminal; the identification information of the slice type supported by the frequency point can be obtained in advance, so that the target cell selected by the terminal can be ensured to meet the service requirement of the terminal, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the terminal slicing service is ensured, and the problem that the continuity of the terminal slicing service cannot be ensured in the target cell determined according to the priority information of the frequency point configured on the network side and the signal intensity of the cell is avoided; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

Wherein the first determining module comprises: the first processing submodule is used for acquiring the frequency points with the priority level higher than that of the current service frequency point in the frequency point set as a first type frequency point according to the reference information, and taking the rest frequency points except the first type frequency point in the frequency point set as a second type frequency point; the second processing submodule is used for measuring the first type frequency point according to a preset period, and taking the cell corresponding to the first type frequency point as a target reselection cell under the condition that the signal quality parameter value of the cell corresponding to the first type frequency point meets the reselection criterion; and the third processing submodule is used for starting the measurement of the second type frequency point under the condition that the signal quality parameter value of the cell corresponding to the current service frequency point is lower than the first threshold value for the second type frequency point, and taking the cell corresponding to the second type frequency point as a target reselection cell under the condition that the signal quality parameter value of the cell corresponding to the second type frequency point meets the reselection criterion.

In an embodiment of the present invention, the meeting the reselection criterion includes at least one of: determining that the first type frequency point meets a reselection criterion under the condition that the signal quality parameter value of the cell corresponding to the first type frequency point is greater than or equal to a second threshold value; determining that the second type frequency point meets a reselection criterion under the conditions that the signal quality parameter value of the cell corresponding to the second type frequency point is greater than or equal to a third threshold, the signal quality parameter value of the cell corresponding to the current service frequency point is less than or equal to a fourth threshold, and the maintaining time length reaches a first time length; or determining that the second type frequency point meets the reselection criterion under the condition that the difference value between the signal quality parameter value of the cell corresponding to the second type frequency point and the signal quality parameter value of the cell corresponding to the current service frequency point reaches a fifth threshold value and the maintaining time length reaches a second time length.

Specifically, the first processing sub-module includes: a first determining unit, configured to determine, according to the reference information, a height between a priority level corresponding to each frequency point in the frequency point set and a priority level of a current service frequency point; and the first acquisition unit is used for acquiring the first type frequency point according to the determination result.

Wherein the first determination unit includes: a first determining subunit, configured to determine that the priority level of the frequency point is lower than or equal to the priority level of the current service frequency point when the identification information of all slice types supported by the frequency point includes the identification information of all slice types supported by the current service frequency point; or, under the condition that the identification information of all slice types supported by the frequency point contains the identification information of all slice types supported by the current service frequency point, determining that the priority level of the frequency point is higher than or equal to the priority level of the current service frequency point; or, under the condition that a part of intersection or no intersection exists between the identification information of all the slice types supported by the frequency point and the identification information of all the slice types supported by the current service frequency point, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the first intersection and the second intersection; the first intersection is the intersection between the identification information of all the slice types supported by the frequency point and the preset slice type identification information, and the second intersection is the intersection between the identification information of all the slice types supported by the current service frequency point and the preset slice type identification information.

Specifically, the determining the priority level of the frequency point and the priority level of the current service frequency point according to the first intersection and the second intersection includes: determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the number of the elements of the first intersection is larger than that of the elements of the second intersection; determining that the priority level of the frequency point is lower than that of the current service frequency point under the condition that the number of the elements of the first intersection is smaller than that of the elements of the second intersection; determining that the priority level of the frequency point is equal to the priority level of the current service frequency point under the condition that the number of the elements of the first intersection is equal to the number of the elements of the second intersection and the number of the elements is not 0; under the condition that the number of elements of the first intersection and the second intersection is 0, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the frequency point priority information; or determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point.

In an embodiment of the present invention, the first determining unit includes: a third determining subunit, configured to determine that the priority level of the frequency point is lower than or equal to the priority level of the current service frequency point when the identification information of all slice types supported by the frequency point includes the identification information of all slice types supported by the current service frequency point; or, a fourth determining subunit, configured to determine that the priority level of the frequency point is higher than or equal to the priority level of the current service frequency point when the identification information of all slice types supported by the frequency point includes the identification information of all slice types supported by the current service frequency point; or, the first processing subunit is configured to obtain, according to the preset slice type identifier information, the type priority information, the frequency point set, and identifier information of slice types supported by each frequency point in the frequency point set, a type priority level of each slice type supported by each frequency point in the frequency point set; and the second determining subunit is used for determining the height between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current service frequency point according to the type priority level.

In this embodiment of the present invention, the determining, according to the type priority, the level between the priority corresponding to each frequency point in the frequency point set and the priority of the current service frequency point includes: determining that the priority level of the frequency point is higher than that of the current service frequency point under the condition that the type priority level of at least one slice type in all slice types supported by the frequency point is higher than the highest type priority level corresponding to all slice types supported by the frequency point of the current service cell; or, under the condition that the highest type priority corresponding to all slice types supported by the frequency point is the same as the highest type priority corresponding to all slices supported by the frequency point of the current service cell, comparing the highest type priority corresponding to all slice types supported by the frequency point with the highest type priority corresponding to all slice types supported by the frequency point of the current service cell, and determining the height between the priority of the frequency point and the priority of the current service frequency point according to the comparison result; or, under the condition that the highest type priority corresponding to all slice types supported by the frequency point is the same as the highest type priority corresponding to all slices supported by the frequency point of the current service cell, determining the height between the priority of the frequency point and the priority of the current service frequency point according to the frequency point priority information; or, under the condition that the highest type priority level corresponding to all slice types supported by the frequency point is the same as the highest type priority level corresponding to all slices supported by the frequency point of the current service cell, determining the height between the priority level of the frequency point and the priority level of the current service frequency point according to the number of all slice types supported by the frequency point and the number of all slice types supported by the current service frequency point; or, under the condition that the highest type priority level corresponding to all slice types supported by the frequency point is lower than the lowest type priority level corresponding to all slice types supported by the frequency point of the current service cell, determining that the priority level of the frequency point is lower than the priority level of the current service frequency point.

Further, the cell reselection apparatus further includes: a first selecting module, configured to select, when the number of the target reselection cells is at least two, one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a first preset rule after determining the target reselection cells according to reference information; wherein the first preset rule comprises at least one of the following rules: the first type frequency point and the second type frequency point exist in the frequency points corresponding to the at least two target reselection cells, and under the condition that the number of cells contained in the first type frequency point is 1, the only cell contained in the first type frequency point is used as a final target reselection cell; the first type frequency point and the second type frequency point exist in the frequency points corresponding to the at least two target reselection cells, the number of the first type frequency points is at least one, and one cell is selected from the cells contained in the at least one first type frequency point as a final target reselection cell according to a second preset rule under the condition that the total number of the cells contained in the at least one first type frequency point is at least two; and under the condition that only the first type frequency point or the second type frequency point exists in the frequency points corresponding to the at least two target reselection cells, selecting one target reselection cell from the at least two target reselection cells as a final target reselection cell according to a second preset rule.

Specifically, the first receiving module includes: the first receiving submodule is used for receiving the first preset information broadcasted by the first network node through the cell system message; or, receiving first preset information sent by a first network node through a dedicated signaling; wherein the information carried by the dedicated signaling comprises at least one of the following information: configuring a special frequency point set for the terminal and identification information of slice types supported by each frequency point in the special frequency point set; configuring a public frequency point set of the terminal and identification information of slice types supported by each frequency point in the public frequency point set; configuring the effective timer duration configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; configuring the effective timer duration configuration information of a public frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the public frequency point set; configuring the effective region configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; and configuring the effective region configuration information of the identification information of the slice type supported by each frequency point in the public frequency point set and the public frequency point set configured to the terminal.

In an embodiment of the present invention, the first determining module includes: and the first determining submodule is used for determining a target reselection cell according to first preset information and second preset information provided to an access layer of the terminal through a non-access layer of the terminal.

The implementation embodiments of the cell reselection method at the terminal side are all applicable to the embodiment of the cell reselection device, and the same technical effects can be achieved.

An embodiment of the present invention further provides a cell reselection apparatus, applied to a first network node, as shown in fig. 10, including:

A first sending module 101, configured to send first preset information to a terminal;

The cell reselection device provided by the embodiment of the invention sends first preset information to a terminal; wherein the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; therefore, the supporting terminal can ensure that the target cell selected by the terminal meets the service requirement of the terminal by acquiring the identification information of the slice type supported by the frequency point in advance, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the slicing service of the terminal is ensured, and the problem that the continuity of the slicing service of the terminal cannot be ensured by determining the target cell according to the priority information of the frequency point configured at the network side and the signal intensity of the cell is solved; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

The identification information of the frequency point set and the slice type supported by each frequency point in the frequency point set is generated by the first network node according to preset information; wherein the preset information comprises at least one of the following information: allowed network slice selection assistance identification Allowed NSSAI information in terminal context information stored by the first network node; default network slice selection auxiliary identifier Default NSSAI information in the terminal context information stored by the first network node; configured network slice selection auxiliary identification Configured NSSAI information in terminal context information stored by the first network node; the first network node stores the frequency point priority parameter information in the terminal context information; frequency point set information locally maintained by the first network node, wherein the frequency point set information comprises same-frequency point set information and different-frequency point set information; and the identification information of the slice type supported by each frequency point in the frequency point set locally maintained by the first network node.

Specifically, the first sending module includes: the first sending submodule is used for broadcasting first preset information through a cell system message; or, sending first preset information to the terminal through a special signaling; wherein the information carried by the dedicated signaling comprises at least one of the following information: configuring a special frequency point set for the terminal and identification information of slice types supported by each frequency point in the special frequency point set; configuring a public frequency point set of the terminal and identification information of slice types supported by each frequency point in the public frequency point set; configuring the effective timer duration configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; configuring the effective timer duration configuration information of a public frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the public frequency point set; configuring the effective region configuration information of the special frequency point set configured to the terminal and the identification information of the slice type supported by each frequency point in the special frequency point set; and configuring the effective region configuration information of the identification information of the slice type supported by each frequency point in the public frequency point set and the public frequency point set configured to the terminal.

The implementation embodiments of the cell reselection method on the first network node side are all applicable to the embodiment of the cell reselection device, and the same technical effects can be achieved.

An embodiment of the present invention further provides a cell reselection apparatus, applied to a second network node, as shown in fig. 11, including:

a second sending module 111, Configured to send the Default slice selection auxiliary identifier Default NSSAI information or the Configured slice selection auxiliary identifier Configured NSSAI information of the terminal to the first network node through the interface protocol.

The cell reselection device provided by the embodiment of the present invention sends Default slice selection auxiliary identifier Default NSSAI information or Configured slice selection auxiliary identifier Configured NSSAI information of a terminal to a first network node through an interface protocol; the method comprises the steps that a first network node is supported to send first preset information to a terminal; wherein the first preset information includes: the method comprises the steps that a frequency point set generated by a first network node and identification information of slice types supported by frequency points in the frequency point set are obtained; therefore, the supporting terminal can ensure that the target cell selected by the terminal meets the service requirement of the terminal by acquiring the identification information of the slice type supported by the frequency point in advance, the terminal can select the target cell suitable for the service according to different slice requirements, the continuity of the slicing service of the terminal is ensured, and the problem that the continuity of the slicing service of the terminal cannot be ensured by determining the target cell according to the priority information of the frequency point configured at the network side and the signal intensity of the cell is solved; meanwhile, the secondary cell reselection process caused by the interruption of the slicing service of the terminal is reduced, the service delay is reduced, and the problems of poor service continuity and serious service delay of the cell reselection scheme in the prior art are well solved.

Further, the cell reselection apparatus further includes: the first configuration module is used for configuring second preset information to a non-access stratum of the terminal through a non-access stratum protocol; wherein the second preset information includes: the cell of the terminal selects or reselects the relevant preset slice type identification information; and the second network node is a mobile management function AMF, a unified data management platform UDM or a session management function SMF.

The implementation embodiments of the cell reselection method on the second network node side are all applicable to the embodiment of the cell reselection device, and the same technical effects can be achieved.

It should be noted that many of the functional components described in this specification are referred to as modules/sub-modules/units/sub-units in order to more particularly emphasize their implementation independence.

In embodiments of the present invention, the modules/sub-modules/units/sub-units may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A cell reselection method is applied to a terminal, and is characterized by comprising the following steps:

receiving first preset information sent by a first network node;

determining a target reselection cell according to the reference information;

2. The cell reselection method of claim 1, wherein the determining a target reselected cell according to the reference information comprises:

3. The cell reselection method of claim 2, wherein the satisfaction of reselection criteria comprises at least one of:

4. The cell reselection method according to claim 2, wherein the acquiring, according to the reference information, a frequency point with a priority higher than a priority of a current serving frequency point in the frequency point set as a first type frequency point comprises:

5. The cell reselection method according to claim 4, wherein the frequency point set has a frequency point that is the same as the current service frequency point, and the priority level of the current service frequency point is the same as the priority level of the same frequency point; alternatively, the first and second electrodes may be,

6. The cell reselection method of claim 4, wherein the first preset information further comprises: frequency point priority information corresponding to each frequency point in the frequency point set configured by the first network node; and/or the presence of a gas in the gas,

7. The cell reselection method according to claim 6, wherein the determining, according to the reference information, the level between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current serving frequency point comprises:

8. The cell reselection method according to claim 7, wherein, when the first network node does not configure the slice type supported by the frequency point, the number of elements of the first intersection is 0; and/or the presence of a gas in the gas,

9. The cell reselection method according to claim 7, wherein the determining, according to the first intersection and the second intersection, the priority level of the frequency point and the priority level of the current serving frequency point includes:

10. The cell reselection method according to claim 6, wherein the determining, according to the reference information, the level between the priority level corresponding to each frequency point in the frequency point set and the priority level of the current serving frequency point comprises:

11. The cell reselection method according to claim 10, wherein the obtaining a type priority level of each slice type supported by each frequency point in the frequency point set according to the preset slice type identification information, the type priority information, the frequency point set, and identification information of the slice type supported by each frequency point in the frequency point set comprises:

wherein the first slice type is any slice type supported by the frequency bins.

12. The cell reselection method according to claim 10, wherein the determining, according to the type priority, a height between a priority corresponding to each frequency point in the frequency point set and a priority of a current serving frequency point comprises:

13. The cell reselection method according to claim 12, wherein the determining the priority level of the frequency point according to the comparison result comprises:

14. The cell reselection method according to claim 6, wherein in the case that the number of the target reselection cells is at least two, after determining the target reselection cell according to the reference information, the method further comprises:

wherein the first preset rule comprises at least one of the following rules:

15. The cell reselection method of claim 14, wherein the second predetermined rule comprises at least one of the following rules:

16. The cell reselection method according to claim 1, wherein the frequency point set and identification information of slice types supported by each frequency point in the frequency point set are generated by the first network node according to preset information;

17. The cell reselection method according to claim 1, wherein the frequency point in the frequency point set is a dedicated frequency point configured by the first network node to the terminal, or a common frequency point for system information broadcast of the first network node.

18. The cell reselection method of claim 1, wherein the receiving first preset information sent by the first network node comprises:

19. The cell reselection method of claim 1, wherein the second preset information further comprises: validity auxiliary information corresponding to the preset slice type identification information; under the condition that the validity auxiliary information is matched with the validity auxiliary information of the current service frequency point, the preset slice type identification information is in a valid state;

20. The cell reselection method of claim 1, wherein the determining a target reselected cell according to the reference information comprises:

21. The cell reselection method of claim 1 or 20, wherein the second predetermined information is pre-configured to the terminal at the non-access stratum layer or configured to the non-access stratum layer by a non-access stratum protocol by a network node.

22. A cell reselection method applied to a first network node, comprising:

sending first preset information to a terminal;

23. The cell reselection method of claim 22, wherein the first preset information further comprises: and the first network node configures the frequency point priority information corresponding to each frequency point in the frequency point set.

24. The cell reselection method according to claim 22, wherein the frequency point set and identification information of slice types supported by each frequency point in the frequency point set are generated by the first network node according to preset information;

25. The cell reselection method of claim 24, wherein the Default NSSAI information or Configured NSSAI information is obtained from the second network node via an interface protocol.

26. The cell reselection method of claim 25, wherein the interface type of the interface protocol is an X2 interface, an Xn interface, an S1 interface, an NG interface, an F1 interface, or an E1 interface;

27. The cell reselection method of claim 25 wherein said second network node is a Distribution Unit (DU), a Radio Access Network (RAN) node, a centralized unit control plane (CU-CP), an access and mobility management function (AMF), a centralized unit user plane (CU-UP), a unified data management platform (UDM), or a Session Management Function (SMF).

28. The cell reselection method according to claim 22, wherein the frequency point in the frequency point set is a dedicated frequency point configured by the first network node to the terminal, or a common frequency point for system information broadcast of the first network node.

29. The cell reselection method of claim 22, wherein the sending first preset information to the terminal comprises:

sending first preset information to a terminal through a special signaling;

30. A cell reselection method applied to a second network node, comprising:

31. The cell reselection method of claim 30, wherein the interface type of the interface protocol is an X2 interface, an Xn interface, an S1 interface, an NG interface, an F1 interface, or an E1 interface;

32. The cell reselection method of claim 30 wherein said second network node is a Distribution Unit (DU), a Radio Access Network (RAN) node, a centralized unit control plane (CU-CP), an access and mobility management function (AMF), a centralized unit user plane (CU-UP), a unified data management platform (UDM), or a Session Management Function (SMF).

33. The cell reselection method of claim 30, further comprising:

34. The cell reselection method of claim 33, wherein the second preset information further comprises: and type priority information corresponding to the preset slice type identification information.

35. The cell reselection method of claim 33, wherein the second preset information further comprises: validity auxiliary information corresponding to the preset slice type identification information;

36. A terminal comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

determining a target reselection cell according to the reference information;

37. The terminal of claim 36, wherein the processor is further configured to:

38. The terminal of claim 37, wherein the processor is further configured to:

39. The terminal of claim 38, wherein the frequency point set has a frequency point that is the same as the current service frequency point, and the priority level of the current service frequency point is the same as the priority level of the frequency point; alternatively, the first and second electrodes may be,

40. The terminal of claim 38, wherein the first preset information further comprises: frequency point priority information corresponding to each frequency point in the frequency point set configured by the first network node; and/or the presence of a gas in the gas,

41. The terminal of claim 40, wherein the processor is specifically configured to:

42. The terminal of claim 40, wherein the processor is specifically configured to:

43. The terminal of claim 42, wherein the processor is specifically configured to:

Wherein the first slice type is any slice type supported by the frequency bins.

44. The terminal of claim 42, wherein the processor is specifically configured to:

45. The terminal of claim 40, wherein the processor is further configured to:

wherein the first preset rule comprises at least one of the following rules:

46. The terminal of claim 36, wherein the second preset information is pre-configured to the terminal at the non-access stratum layer, or configured to the non-access stratum layer by a network node through a non-access stratum protocol.

47. A network node, being a first network node, comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

sending first preset information to a terminal through the transceiver;

48. The network node of claim 47, wherein the first preset information further comprises: and the first network node configures the frequency point priority information corresponding to each frequency point in the frequency point set.

49. The network node according to claim 47, wherein the frequency point set and identification information of slice types supported by each frequency point in the frequency point set are generated by the first network node according to preset information;

50. The network node of claim 49, wherein the Default NSSAI message or the Configured NSSAI message is obtained from the second network node via an interface protocol.

51. A network node, which is a second network node, comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

52. The network node of claim 51, wherein the processor is further configured to:

53. The network node of claim 52, wherein the second preset information further comprises: and type priority information corresponding to the preset slice type identification information.

54. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the cell reselection method according to any of claims 1 to 35.

55. A cell reselection apparatus applied to a terminal, comprising:

56. A cell reselection apparatus applied to a first network node, comprising:

57. A cell reselection apparatus applied to a second network node, comprising: