CN106879009B

CN106879009B - Cell reselection method, user equipment and network side equipment

Info

Publication number: CN106879009B
Application number: CN201710184217.6A
Authority: CN
Inventors: 傅婧; 梁靖; 张元�
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-03-24
Filing date: 2017-03-24
Publication date: 2020-03-20
Anticipated expiration: 2037-03-24
Also published as: CN106879009A; WO2018171408A9; WO2018171408A1

Abstract

The invention provides a cell reselection method, user equipment and network side equipment. The cell reselection method applied to the user equipment comprises the following steps: receiving system information broadcasted by a cell, wherein the system information carries information of RNA and/or information of slices to which the cell belongs; when cell reselection is needed, preferentially selecting a cell which is the same as the RNA and/or has the same slice as the current resident cell of the user equipment as a target cell; and residing in the target cell. The scheme of the invention can lead the user equipment to preferentially select the cell which does not need RNA updating and/or slice updating as much as possible to reside when reselecting the cell, thereby reducing the updating frequency of RNA and/or slice, further effectively reducing unnecessary signaling overhead generated by cell reselection and ensuring the user experience.

Description

Cell reselection method, user equipment and network side equipment

Technical Field

The present invention relates to the field of communications, and in particular, to a cell reselection method, a user equipment, and a network side device.

Background

In order to simultaneously guarantee power saving and fast data transmission of a terminal, a New mobility state RRC _ INACTIVE, i.e., an INACTIVE state of a UE, is introduced into a New RAT (New Radio) system of 5G. When the UE is in this state, the RAN (radio access network) node, although releasing the RRC connection of the UE, still retains the connection of the core network of the UE.

UE AS context is stored in the UE side and the RAN node, so that the UE AS context can be quickly recovered to a connected state or kept in an inactivated state and transmits/receives data;

the UE is transparent to the core network in the inactive state, i.e. the core network still considers that the UE is always connected, so that downlink signaling or data will reach the RAN node. In order to ensure that the RAN node pages the UE, a RAN level location area rna (RAN Notification area) is currently introduced. When the RAN side switches the UE to the inactive state, the RAN configures the RNA to which the UE belongs, where the RNA may be divided by cell ID or RAN area ID. When the UE is in an inactive state, the gNB of the RAN node sends a notification message to search for the UE through all cells under the RNA region.

In the existing cell reselection process in an inactive state, the UE selects a cell with a better signal to camp on based on an R criterion, and if the newly selected camping cell does not belong to the same RNA as the original camping cell, RNA update is required to be performed so that the RAN node can find the UE, and the RNA update inevitably generates related signaling, which causes an excessive overhead between an air interface and a RAN interface.

Similarly, the mobile network system specifically includes different types of networks (e.g., mobile broadband, large-scale internet of things, mission-critical internet of things, etc.) to serve different types of devices and requirements (e.g., mobility, charging, security, policy control, latency, reliability, etc.). In order to save cost, the current 5G communication system divides a plurality of logical networks on an independent physical network by a network slicing technology without separately deploying different networks. This also means that after the UE reselects a cell, if the new camping cell and the old camping cell do not belong to the same slice, slice related update is also needed, which also generates signaling overhead as does RNA update.

Disclosure of Invention

The invention aims to reduce the signaling overhead generated by RNA updating and/or slice updating when a user equipment reselects a cell.

In order to achieve the above object, in one aspect, an embodiment of the present invention provides a cell reselection method applied to a user equipment, including:

receiving system information broadcasted by a cell, wherein the system information carries information of RNA and/or information of slices to which the cell belongs;

when cell reselection is needed, preferentially selecting a cell which is the same as the RNA and/or has the same slice as the current resident cell of the user equipment as a target cell;

and residing in the target cell.

Wherein the step of receiving the system information broadcasted by the cell comprises: receiving system information broadcasted by a cell, and acquiring information of RNA and/or slice information of a current resident cell and information of RNA and/or slice information of a neighboring cell adjacent to the current resident cell;

the step of preferentially selecting the cell which is the same as the RNA and/or the same as the slice of the cell where the user equipment currently resides as the target cell comprises the following steps: and preferentially selecting a cell which is the same as the RNA and/or the same as the slice of the cell to which the user equipment currently resides as a target cell from candidate cells, wherein the candidate cells comprise the current resident cell and the adjacent cell.

The receiving system information broadcasted by the cell, the information of the RNA and/or the slice to which the current cell belongs, and the information of the RNA and/or the slice to which the neighboring cell adjacent to the current cell belongs, includes:

receiving system information broadcasted by a current resident cell, acquiring information and/or slice information of an RNA (ribonucleic acid) to which the current resident cell belongs from the system information broadcasted by the current resident cell, scanning an adjacent cell adjacent to the current resident cell, receiving the system information broadcasted by the adjacent cell, and acquiring the information and/or slice information of the RNA to which the adjacent cell belongs from the system information broadcasted by the adjacent cell;

or

Receiving system information broadcasted by a current resident cell, and acquiring the system information broadcasted by the current resident cell: information of an RNA and/or a slice to which the current resident cell belongs, and information of an RNA and/or a slice to which a neighboring cell adjacent to the current resident cell belongs.

If the information of the RNA to which the current cell belongs is obtained from the system information broadcasted by the current cell and the information of the RNA to which the neighboring cell belongs is obtained from the system information broadcasted by the neighboring cell, the information of the RNA to which the current cell belongs at least includes: the RAN area ID of the RNA to which the current resident cell belongs, and the information of the RNA to which the neighbor cell belongs at least comprises: RAN area ID of RNA to which neighbor cell belongs;

if the information of the slice to which the current cell belongs is obtained from the system information broadcasted by the current cell and the information of the slice to which the neighboring cell belongs is obtained from the system information broadcasted by the neighboring cell, the information of the slice to which the current cell belongs at least includes: the ID of the slice to which the current camping cell belongs, and the information of the slice to which the neighboring cell belongs at least includes: ID of the slice to which the neighbor cell belongs;

if the information of the RNA to which the current cell belongs and the information of the RNA to which the neighboring cell belongs are obtained from the system information broadcasted by the current cell, the information of the RNA to which the current cell belongs at least includes: RAN area ID of RNA to which the current camping cell belongs; the information of the RNA to which the neighbor cell belongs at least includes: a first list of neighbor cells belonging to the same RNA as the current resident cell and/or a second list of neighbor cells belonging to different RNAs as the current resident cell and/or a third list of neighbor cells to be classified according to RNA;

if the information of the slice to which the current cell belongs and the information of the slice to which the neighboring cell belongs are obtained from the system information broadcasted by the current cell, the information of the slice to which the current cell belongs at least includes: the ID of the slice to which the current resident cell belongs; the information of the slice to which the neighbor cell belongs at least includes: a fourth list of neighbor cells belonging to the same slice ID as the current camped cell and/or a fifth list of neighbor cells belonging to different slice IDs as the current camped cell and/or a sixth list of neighbor cells sorted by slice.

Wherein, in the candidate cells, preferentially selecting a cell which is the same as the RNA of the cell where the user equipment currently resides as a target cell comprises the following steps:

trying to select a cell meeting a preset first reselection condition as a target cell from candidate cells belonging to the same RNA as the current resident cell;

and if the target cell meeting the preset first reselection condition cannot be selected, trying to select a cell meeting a preset second reselection condition as the target cell from the candidate cells which belong to different RNAs from the current resident cell.

Wherein, in the candidate cells, preferentially selecting a cell which is the same as the slice to which the current resident cell of the user equipment belongs as a target cell, comprises:

trying to select a cell meeting a preset third reselection condition as a target cell from candidate cells belonging to the same slice as the current resident cell;

and if the target cell meeting the preset third reselection condition cannot be selected, trying to select a cell meeting the preset fourth reselection condition as the target cell from candidate cells belonging to different slices from the current resident cell.

Wherein, in the candidate cells, preferentially selecting a cell which is the same as the RNA and the slice to which the current resident cell of the user equipment belongs as a target cell, comprises the following steps:

trying to select a cell which meets a preset fifth reselection condition as a target cell from candidate cells which belong to the same RNA and are in the same slice as the current resident cell;

if the target cell meeting the preset fifth reselection condition cannot be selected, trying to select a cell meeting the preset sixth reselection condition as the target cell from candidate cells which belong to the same RNA and different slices as the current resident cell and/or candidate cells which belong to the same slice and different RNAs as the current resident cell;

and if the target cell meeting the preset sixth reselection condition cannot be selected, trying to select a cell meeting the preset seventh reselection condition as the target cell from candidate cells which belong to different RNAs and different slices from the current resident cell.

The method comprises the following steps of preferentially selecting a cell which is the same as RNA (ribonucleic acid) and/or has the same slice as the cell where the user equipment currently resides as a target cell from candidate cells, wherein the step comprises the following steps:

determining the priority of each candidate cell based on a preset rule, wherein the priority comprises the following steps:

based on the RNA priority offset of the candidate cell, performing forward correction on the priority of the candidate cell belonging to the same RAN area ID as the current resident cell and/or performing reverse correction on the priority of the candidate cell belonging to different RAN area IDs from the current resident cell;

and/or

And based on the slice priority offset of the candidate cell, performing forward correction on the priority of the candidate cell belonging to the same slice as the current resident cell and/or performing reverse correction on the priority of the candidate cell belonging to a different slice from the current resident cell.

Wherein, the area reselection method further comprises:

and acquiring the RNA priority offset and/or the slice priority offset of the candidate cell from the system information broadcasted by the current resident cell.

On the other hand, an embodiment of the present invention further provides a cell reselection method, which is applied to a network side device, and includes:

and broadcasting and sending system information of the cell by the network side equipment, wherein the system information carries the information of the RNA to which the cell belongs and/or the information of the slice to which the cell belongs.

Wherein the information of the RNA to which the cell belongs at least comprises: a RAN area ID of an RNA to which the cell belongs;

the information of the slice to which the cell belongs at least includes: an ID of a slice to which the cell belongs.

Wherein the system information further carries information of RNA and/or information of slices to which neighboring cells adjacent to the cell belong.

Wherein the information of the RNA to which the neighboring cell belongs, which is carried by the system information, at least comprises:

the information of the RNA to which the neighbor cell belongs at least includes: a first list of neighbor cells belonging to the same RNA as the cell and/or a second list of neighbor cells belonging to a different RNA from the cell and/or a third list of the neighbor cells sorted by RNA;

the information of the slice to which the neighbor cell belongs at least includes:

a fourth list of neighbor cells belonging to the same slice ID as the cell and/or a fifth list of neighbor cells belonging to a different slice ID from the cell and/or a third list of neighbor cells sorted by slice.

Wherein, the system information also carries:

an RNA priority bias and/or a slice priority bias for the candidate cell.

In addition, an embodiment of the present invention further provides a user equipment, including:

a receiving module, configured to receive system information broadcasted by a cell, where the system information carries information of an RNA and/or information of a slice to which the cell belongs;

the selection module is used for preferentially selecting a cell which is the same as the RNA and/or the same as the slice of the cell where the user equipment currently resides as a target cell when the cell reselection is needed;

and the residing module is used for residing the target cell.

The receiving module specifically receives system information broadcasted by a cell, and obtains information and/or slicing information of an RNA (ribonucleic acid) to which a current resident cell belongs, and information and/or slicing information of an RNA to which an adjacent cell adjacent to the current resident cell belongs;

specifically, the selection module preferentially selects, as a target cell, a cell that is the same as an RNA and/or a slice to which a cell currently camped by the user equipment belongs, from among candidate cells, where the candidate cells include the currently camped cell and the neighboring cells.

Wherein the receiving module comprises:

the first receiving submodule is used for receiving system information broadcasted by a current resident cell, acquiring information and/or slice information of an RNA (ribonucleic acid) to which the current resident cell belongs from the system information broadcasted by the current resident cell, scanning an adjacent cell adjacent to the current resident cell, receiving the system information broadcasted by the adjacent cell, and acquiring the information and/or slice information of the RNA to which the adjacent cell belongs from the system information broadcasted by the adjacent cell;

or

A second receiving submodule, configured to receive system information broadcasted by a current camped cell, and obtain, from the system information broadcasted by the current camped cell: information of an RNA and/or a slice to which the current resident cell belongs, and information of an RNA and/or a slice to which a neighboring cell adjacent to the current resident cell belongs.

Wherein the selection module comprises:

a first selection submodule comprising:

the first selection unit is used for trying to select a cell meeting a preset first reselection condition as a target cell from candidate cells belonging to the same RNA as the current resident cell; and if the target cell meeting the preset first reselection condition cannot be selected, trying to select a cell meeting a preset second reselection condition as the target cell from the candidate cells which belong to different RNAs from the current resident cell.

Wherein the selection module comprises:

a first selection submodule comprising:

a second selecting unit, configured to attempt to select a cell that meets a preset third reselection condition as a target cell from candidate cells belonging to a same slice as the current camped cell; and if the target cell meeting the preset third reselection condition cannot be selected, trying to select a cell meeting the preset fourth reselection condition as the target cell from candidate cells belonging to different slices from the current resident cell.

Wherein the selection module comprises:

a first selection submodule comprising:

a third selecting unit, configured to attempt to select, as a target cell, a cell that satisfies a preset fifth reselection condition from candidate cells that belong to the same RNA and are in the same slice as the current resident cell;

if the target cell meeting the preset fifth reselection condition cannot be selected, trying to select a cell meeting the preset sixth reselection condition as the target cell from candidate cells which belong to the same RNA and different slices as the current resident cell and/or candidate cells which belong to the same slice and different RNAs as the current resident cell; and if the target cell meeting the preset sixth reselection condition cannot be selected, trying to select a cell meeting the preset seventh reselection condition as the target cell from candidate cells which belong to different RNAs and different slices from the current resident cell.

Wherein the selection module comprises:

a second selection submodule for:

and/or

Wherein the receiving module further comprises:

and the third receiving submodule is used for acquiring the RNA priority offset and/or the slice priority offset of the candidate cell from the system information broadcasted by the current resident cell.

In addition, the present invention also provides a network side device, including:

a sending module, configured to send system information of a cell, where the system information carries information of an RNA to which the cell belongs and/or information of a slice to which the cell belongs.

Wherein the information of the RNA to which the neighbor cell belongs at least comprises: a first list of neighbor cells belonging to the same RNA as the cell and/or a second list of neighbor cells belonging to a different RNA from the cell and/or a third list of the neighbor cells sorted by RNA;

the information of the slice to which the neighbor cell belongs at least includes: a fourth list of neighbor cells belonging to the same slice ID as the cell and/or a fifth list of neighbor cells belonging to a different slice ID from the cell and/or a third list of neighbor cells sorted by slice.

Wherein, the system information also carries:

an RNA priority bias and/or a slice priority bias for the candidate cell.

The scheme of the invention has the following beneficial effects:

the scheme of the invention can lead the user equipment to preferentially select the cell which does not need RNA updating and/or slice updating as much as possible to reside when reselecting the cell, thereby reducing the updating frequency of RNA and/or slice, further effectively reducing unnecessary signaling overhead generated by cell reselection and ensuring the user experience.

Drawings

Fig. 1 is a schematic diagram illustrating steps of a cell reselection method applied to a client device according to the present invention;

fig. 2 is a schematic diagram illustrating steps of a cell reselection method applied to a network side device according to the present invention;

FIG. 3 is a schematic diagram of the logical structure of the client device of the present invention;

fig. 4 is a schematic structural diagram of a network-side device according to the present invention;

fig. 5 is a schematic structural diagram of a client device according to 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 invention provides a solution for solving the problem of large signaling overhead caused by the need of updating RNA or slice after the existing user equipment reselects a cell.

In one aspect, an embodiment of the present invention provides a cell reselection method, applied to a user equipment (e.g., a terminal), including:

step 11, receiving system information broadcasted by a cell, wherein the system information carries information of RNA and/or information of slices to which the cell belongs;

step 12, when needing to reselect the cell, preferentially selecting the cell which is the same as the RNA and/or the same as the slice of the cell where the user equipment currently resides as a target cell;

step 13, residing in the target cell, wherein it should be noted that the target cell may be the current resident cell or another new cell.

Obviously, the method of the embodiment enables the user equipment to preferentially select the cell which does not need to perform RNA update and/or slice update as much as possible to camp when reselecting the cell, thereby reducing the update frequency of RNA and/or slice, further effectively reducing unnecessary signaling overhead generated by cell reselection, and ensuring user experience.

The cell reselection method of the present embodiment is described in detail below.

Referring to step 13 above, in practical application, the user equipment of this embodiment selects a target cell from candidate cells for camping, where the candidate cell is obviously a cell that can be scanned by the user equipment, and may be one or multiple, and generally includes a current camping cell of the user equipment and neighboring cells adjacent to the current camping cell.

Correspondingly, in step 11, the ue specifically receives the system information broadcast by the cell to obtain information and/or slice information of an RNA to which the current camped cell belongs and information and/or slice information of an RNA to which a neighboring cell adjacent to the current camped cell belongs;

by way of exemplary introduction, the present embodiment may obtain information of an RNA to which a current camped cell belongs and/or information of an RNA to which a neighboring cell belongs in two ways;

one is the information of which cell's RNA, and is obtained from the system information broadcast by which cell. The method comprises the steps of receiving system information broadcasted by a cell, obtaining information of RNA and/or information of slices to which a current resident cell belongs, scanning an adjacent cell adjacent to the current resident cell, receiving the system information broadcasted by the adjacent cell, and obtaining the information of the RNA and/or the information of slices to which the adjacent cell belongs from the system information broadcasted by the adjacent cell;

and the other method is to directly acquire the information of the RNAs of all candidate cells from the system information broadcasted by the current resident cell. Namely, receiving the system information broadcasted by the current resident cell, and acquiring the following information from the system information broadcasted by the current resident cell: information of the RNA and/or the slice to which the current resident cell belongs, and information of the RNA and/or the slice to which the neighboring cell adjacent to the current resident cell belongs.

By way of exemplary introduction, if the information of the RNA of each candidate cell is obtained in the first manner, the information of the RNA to which the current camping cell belongs at least includes: the RAN area ID of the RNA to which the currently camped cell belongs and/or the ID of the slice. Similarly, the information of the RNA to which the neighbor cell belongs at least includes: the RAN area ID of the RNA to which the neighbor cell belongs and/or the ID of the slice.

The user equipment may compare the RAN area ID of the neighboring cell with the RAN area ID of the currently camped cell, thereby determining a candidate cell that is the same as the RNA to which the currently camped cell belongs. Similarly, the ue may also compare the slice ID of the neighboring cell with the slice ID of the current camped cell, so as to determine a candidate cell that is the same as the slice to which the current camped cell belongs.

Then, the ue may preferentially use a candidate cell belonging to the same RNA and/or the same slice as the currently camped cell as the target cell to camp on.

In addition, if the information of the RNA of each candidate cell is obtained by the second method, the information of the RNA to which the current camping cell belongs at least includes: the RAN area ID of the RNA to which the current resident cell belongs, and the information of the RNA to which the neighbor cell belongs at least comprises the following information: a first list of neighbor cells belonging to the same RNA as the current resident cell and/or a second list of neighbor cells belonging to different RNAs as the current resident cell and/or a third list of neighbor cells to be classified according to RNA.

As an exemplary introduction, it is assumed that a cell1 in which a user equipment currently resides belongs to a RAN area ID1, and a surrounding neighbor cell2 belongs to the RAN area ID 1; a surrounding neighbor cell3 belonging to RAN area ID 1; a surrounding neighbor cell4 belonging to the RAN area ID 2; the surrounding neighbor cell5 belongs to the RAN area ID 3.

The RAN area ID of the currently camped cell1 is RAN area ID1, the first list may be { cell2, cell3}, the second list may be { cell4, cell5}, and the third list is a plurality of RAN areas ID 1{ cell1, cell2, cell3}, RAN area ID 2{ cell 4}, and RAN area ID 3{ cell5 }.

Obviously, based on the above-mentioned several RAN information display representations, the user equipment may determine which neighboring cells are the same as the RAN to which the currently camped cell belongs, which neighboring cells are different from the RAN to which the currently camped cell belongs, or even the RAN area ID specifically corresponding to each candidate cell.

Similarly, the information of the slice in this embodiment may be the same as the information of the RAN, that is, if the information of the slice to which the current camped cell belongs is obtained from the system information broadcasted by the current camped cell and the information of the slice to which the neighboring cell belongs is obtained from the system information broadcasted by the neighboring cell, the information of the slice to which the current camped cell belongs at least includes: the ID of the slice to which the current camping cell belongs, and the information of the slice to which the neighbor cell belongs at least include: ID of the slice to which the neighbor cell belongs;

or

If the information of the slice to which the current cell belongs and the information of the slice to which the neighboring cell belongs are obtained from the system information broadcasted by the current cell, the information of the slice to which the current cell belongs at least includes: the ID of the slice to which the current resident cell belongs; the information of the slice to which the neighbor cell belongs at least includes: a fourth list of neighbor cells belonging to the same slice ID as the current camped cell and/or a fifth list of neighbor cells belonging to a different slice ID from the current camped cell and/or a sixth list of neighbor cells sorted by slice.

Obviously, the ue can also determine, based on the slice information, which neighboring cells are the same as the slice to which the current camped cell belongs, which neighboring cells are different from the slice to which the current camped cell belongs, and even the slice ID specifically corresponding to each candidate cell.

After determining the slice information and the RNA information, the ue of this embodiment preferentially selects, as the target cell, a cell that is the same as the RNA to which the current cell where the ue resides.

The preferred scheme is described below by way of example.

There are two ways in this example to preferentially select cells of the same RNA and/or same section for residence.

One is to preferentially select a target cell from candidate cells belonging to the same RNA and/or the same slice as the current resident cell, and if the target cell cannot be selected, select the target cell from other candidate cells.

By way of exemplary introduction, if, among the candidate cells, a cell that is the same as the RNA to which the current camping cell of the user equipment belongs is preferentially selected as the target cell, the method includes the following steps:

trying to select a cell meeting a preset first reselection condition as a target cell from candidate cells belonging to the same RNA as a current resident cell; the preset first reselection condition may, but need not, generally refer to only one condition, and may include an existing R criterion and/or an idle cell reselection criterion; for example, if the first reselection condition adopts an R criterion, a cell with better signal quality may be selected as a target cell from candidate cells belonging to the same RNA, and since the R criterion and the idle cell reselection criterion are both related to the prior art, detailed description thereof is omitted here.

If the target cell meeting the preset first reselection condition cannot be selected, trying to select a cell meeting the preset second reselection condition as the target cell from candidate cells which belong to different RNAs with the current resident cell; the preset second reselection condition may also, but need not, generally refer to only one condition, and may include an existing R criterion and/or an idle cell reselection criterion;

in the same way as above, if a cell with the same slice as the cell where the ue currently resides is preferentially selected as the target cell in the candidate cells, the method includes the following steps:

Obviously, the preset third reselection condition and the preset fourth reselection condition in this embodiment may also, but need not necessarily, refer to only one condition, and may include the existing R criterion and/or the idle cell reselection criterion.

Further, if a cell with the same RNA and slice as the cell where the user equipment currently resides is preferentially selected as the target cell among the candidate cells, the method includes the following steps:

trying to select a cell which meets a preset fifth reselection condition as a target cell from candidate cells which belong to the same RNA and are in the same slice with the current resident cell;

The preset fifth reselection condition, the preset sixth reselection condition, and the preset seventh reselection condition may also, but need not, be only one condition, and may include an existing R criterion and/or an idle cell reselection criterion.

It can be seen that, in this embodiment, the target cell is selected from the candidate cells that belong to the same RNA and the same slice as the current resident cell first, if the target cell is not selected, the target cell is selected from the candidate cells that belong to the same RNA but different slices and/or different RNA slices as the current resident cell first, and if the target cell is still not selected, the target cell is selected from the other candidate cells that are different from the current resident cell both in RNA and slice.

Obviously, with the first shown priority cell method, the present embodiment may make it more likely for the ue to select a cell for camping that does not require RNA update and/or slice update.

Another preferred selection scheme may be to set a priority offset, and determine the priority of each candidate cell based on the priority offset, where the priority offset may ensure that a candidate cell belonging to the same RNA and/or the same slice as the current resident cell has a higher priority than other candidate cells, so that a higher probability of becoming the target cell is obtained in the selection process.

By way of exemplary introduction, the step of preferentially selecting, as a target cell, a cell that is the same as and/or has the same slice as an RNA to which a cell where the user equipment currently resides, includes:

determining the priority of each candidate cell based on a preset rule; here, the present embodiment does not limit the possible form of the preset rule, and as an exemplary introduction, the priority of the candidate cell may be determined according to the cell signal strength, the signal quality, and the idle degree. For example, the stronger the signal candidate cell, the higher its priority;

then, based on the RNA priority offset of the candidate cell, the priority of the candidate cell belonging to the same RAN area ID as the current resident cell is corrected in a forward direction and/or the priority of the candidate cell belonging to different RAN area IDs from the current resident cell is corrected in a reverse direction;

and/or

Based on the slice priority offset of the candidate cell, performing forward correction on the priority of the candidate cell belonging to the same slice as the current resident cell and/or performing reverse correction on the priority of the candidate cell belonging to a different slice from the current resident cell;

and selecting a cell with the highest priority as a target cell from the candidate cells.

Obviously, based on the second preferred mode, the scheme of this embodiment also enables the ue to select cells that do not need RNA update and/or do not need slice update as much as possible for camping.

In addition, in practical application, the method of this embodiment may enable the system information broadcasted by the current camping cell to carry the RNA priority offset of the candidate cell and/or the slice priority offset.

Taking the RNA priority offset as an example, the RNA priority offset may be different priority offsets corresponding to different RNAs, and when determining the priority of each candidate cell based on the R criterion, the priority of each candidate cell is corrected according to the RNA priority offset;

or only the candidate cell belonging to the same RNA as the current resident cell has a priority offset, correspondingly, when the priority of each candidate cell is determined based on the R criterion, only the priority of the candidate cell belonging to the same RNA as the current resident cell is corrected in the forward direction according to the RNA priority offset so as to increase the probability that the candidate cell is selected as the target cell;

or only the candidate cells belonging to different RNAs with the current resident cell have priority offsets, correspondingly, when the priority of each candidate cell is determined based on the R criterion, only the priority of the candidate cells belonging to different RNAs with the current resident cell is reversely corrected according to the RNA priority offsets so as to reduce the probability that the candidate cells are selected as the target cells.

Above is an introduction of the cell reselection method on the user equipment side in this embodiment, and corresponding to the user equipment, another embodiment of the present invention further provides a cell reselection method applied to a network-side device (such as a gNB base station), as shown in fig. 2, including:

step 21, the network side equipment broadcasts and sends the system information of the cell, and the system information carries the information of the RNA to which the cell belongs and/or the information of the slice to which the cell belongs.

Obviously, the method of this embodiment enables the network side device to indicate, through the broadcasted system information, that the user equipment of the present invention performs cell reselection, preferentially select a cell that does not need to perform RNA update and/or slice update for camping, so that the frequency of performing RNA update and/or slice update by the user equipment can be effectively reduced, thereby effectively reducing unnecessary signaling overhead generated by cell reselection, and ensuring user experience.

Specifically, on the basis of the above, the information of the RNA to which the cell belongs in this embodiment at least includes: RAN area ID of RNA to which the cell belongs; the information of the slice to which the cell belongs at least includes: the ID of the slice to which the cell belongs.

When the cell of the present embodiment becomes a current camping cell of the user equipment, the user equipment may obtain information of an RNA and/or information of a slice to which the current camping cell belongs.

Similarly, when the cell of the present embodiment becomes a neighboring cell adjacent to the currently camped cell of the user equipment, the user equipment may obtain information of RNA and/or slice information of the neighboring cell adjacent to the currently camped cell.

In addition, the system information of the cell in this embodiment may also carry information of RNAs to which neighboring cells adjacent to the cell belong.

That is, if the cell of the present embodiment becomes the current resident cell of the ue, the user may directly obtain the RNA information and the slice information of the current resident cell and the neighboring cells adjacent to the current resident cell from the system information broadcast by the current resident cell.

Specifically, the information of the RNA to which the neighboring cell belongs at least includes: a first list of neighbor cells belonging to the same RNA as a cell and/or a second list of neighbor cells belonging to a different RNA from said cell and/or a third list of said neighbor cells sorted by RNA;

Similarly to the RNA information, the information of the slice to which the neighboring cell belongs in this embodiment at least includes: a fourth list of neighbor cells belonging to the same slice ID as the cell and/or a fifth list of neighbor cells belonging to a different slice ID from the cell and/or a third list of neighbor cells sorted by slice.

In addition, the system information obtained in this embodiment further carries: the RNA priority offset and/or the slice priority offset enable the user equipment to correct the priority of the candidate cell based on the RNA priority offset and/or the slice priority offset in the cell reselection process, so that the cell which does not need RNA updating and slice updating can be selected as much as possible for residence.

In the following, different implementation manners are combined to describe in detail cell reselection methods for the UE and the network side device.

Implementation mode 1: the network side equipment broadcasts the information of the RNA of the cell where the UE currently resides, and Inactive UE (Inactive UE) preferentially performs cell reselection in the cell where the UE currently resides and the cell which belongs to the same RNA as the cell where the UE currently resides.

Assume that the RAN area ID of the RNA to which the Inactive UE belongs includes two, namely { RAN area ID1, RAN area ID2 }.

Inactive UE resides in cell1, cell1 belongs to RAN area ID1, and adjacent cells are around cell 1: cell2, belonging to RAN area ID 1; cell3, belonging to RAN area ID 1; cell4, belonging to RAN area ID 2; cell5, belonging to RAN area ID 3; cell6, belonging to RAN area ID 4.

Step 1: the method comprises the steps that network side equipment broadcasts system information of a cell1 cell, wherein the system information comprises RANarea ID1 to which the cell1 cell belongs;

step 2: inactive UE resides in cell1, when reselecting the cell, first scanning surrounding adjacent cells, reading system information of each adjacent cell, obtaining which surrounding adjacent cells also belong to RAN area ID1 or RAN area ID2, sorting the adjacent cells according to R criteria (namely an existing idle state R criteria calculation formula), and selecting the cell with the best signal quality to reside; and only when no suitable cell exists in the adjacent cells, carrying out cell reselection according to the idle cell reselection rule.

For example, if inactive UE finds that neighboring cells cell2, cell3, and cell4 also belong to the same RNA, the cells 2 and cell3 and the currently camped cell1 are sorted according to the R criterion, for example, cell2 with better signal quality is selected for camping; or the signal quality of the cell1, the cell2, the cell3 and the cell4 is poor and cannot meet the S criterion, the UE performs cell reselection according to an idle cell reselection rule, for example, selects the cell5 for camping.

Implementation mode 2: the network side equipment broadcasts the information of the RNA of the current resident cell of the UE and the list of the adjacent cells belonging to the RNA, and the inactive state UE preferentially carries out cell reselection in the current resident cell and the adjacent cells belonging to the same RNA with the current resident cell.

Let the RNA to which the inactive state UE belongs be { RAN area ID1 }. Inactive UE resides in cell1, and cell1 belongs to RAN area ID 1. There are neighbor cells around cell 1: cell2, belonging to RAN area ID 1; cell3, belonging to RAN area ID 1; cell4, belonging to RAN area ID 2; cell5, belonging to RAN area ID 1; cell6, belonging to RAN area ID 3.

Step 1: the network side equipment broadcasts the system information of the cell1, wherein the system information comprises a RAN area ID1 to which the cell1 belongs and a neighbor cell list { cell2, cell3 and cell5} which belongs to the RAN area ID 1;

step 2: the Inactive UE resides in the cell1, when cell reselection is carried out, firstly, according to system information in the cell1, adjacent cells 2, 3 and 5 which belong to the same RNA region with the cell1 are determined; sorting the cells 1, 2, 3 and 5 according to the R criterion, and selecting the cell with the best signal quality for residing; and only when the cells are not suitable, performing cell reselection according to the idle cell reselection rule, for example, scanning a cell6 of an adjacent cell in the reselection process, and finally selecting the cell6 to reside according to the idle cell reselection rule.

Implementation mode 3: the network side equipment broadcasts the information of the RNA of the current resident cell of the UE and a list of adjacent cells not belonging to the RNA, and inactive state UE preferentially performs cell reselection in the current resident cell and the adjacent cells belonging to the same RNA with the current resident cell.

Let the RNA to which the inactive state UE belongs be { RAN area ID1 }.

Inactive UE resides in cell1, cell1 belongs to RAN area ID1, ell1 there is a neighboring cell around: cell2, belonging to RAN area ID 1; cell3, belonging to RAN area ID 1; cell4, belonging to RAN area ID 2; cell5, belonging to RAN area ID 1; cell6, belonging to RAN area ID 3.

Step 1: the network side equipment broadcasts the system information of the cell1, wherein the system information comprises a RAN area ID1 to which the cell1 belongs and a neighbor cell list { cell4, cell6} which does not belong to a RAN area ID 1;

step 2: the Inactive UE resides in a cell1, when cell reselection is carried out, firstly, according to system information in the cell1, a cell4 and a cell6 are temporarily listed as blacklists, and firstly, adjacent cells cell2, cell3 and cell5 belonging to RAN area ID1 are measured; sorting the cells in cell1, cell2, cell3 and cell5 according to an R criterion, and selecting the cell with the best signal quality for residing; and only when the cells are not suitable, starting to measure the cells 4 and 6, for example, selecting the cell6 for camping according to an idle cell reselection rule.

Implementation mode 4: the network side equipment broadcasts the information of the RNA of the cell where the UE currently resides, a list of adjacent cells belonging to the RNA and a list of adjacent cells belonging to other surrounding RNAs, and inactive state UE preferentially reselects the cell in the current resident cell and the cell belonging to the same RNA as the current resident cell.

Inactive UE resides in cell1, cell1 belongs to RAN area ID1, and adjacent cells are around cell 1: cell2, belonging to RAN area ID 1; cell3, belonging to RAN area ID 1; cell4, belonging to RAN area ID 2; cell5, belonging to RAN area ID 3; cell6, belonging to RAN area ID 3.

Step 1: the network side equipment broadcasts the system information of the cell1, wherein the system information comprises a RAN area ID1 to which the cell1 belongs, a neighbor cell list { cell2, cell3} of the RAN area ID1 to which RNA belongs, a neighbor cell list { cell 4} of the RAN area ID2 to which surrounding RNA belongs, and a neighbor cell list { cell5, cell6} of the RAN area ID3 to which surrounding RNA belongs.

Step 2: when the Inactive UE resides in the cell1 and cell reselection is performed, it is determined that the cell2, the cell3, the cell4 and the cell1 where the Inactive UE currently resides belong to the same RNA region according to system information in the cell 1. Then, the UE measures adjacent cells cell2, cell4 and serving cell1, namely, the cells with the best signal quality are selected for residing according to R criterion sorting; and only when the cells are not suitable, considering other adjacent cells which do not belong to the same RNA as the cell1, for example, reselecting the cell5 to reside according to an idle cell reselection rule.

Example 5: the network side equipment broadcasts the information of the RNA of the cell where the UE currently resides and the increased priority offset for the RNA;

Inactive UE resides in cell1, cell1 belongs to RAN area ID1, and adjacent cells are around cell 1: cell2, belonging to RAN area ID 1; cell3, belonging to RAN area ID 1; cell4, belonging to RAN area ID 2; cell5, belonging to RAN area ID 3; ,

step 1: the network side equipment broadcasts the information of the RNA of the cell1 where the UE currently resides, wherein the information comprises the RAN area ID1 to which the cell1 belongs and an offset suitable for an inactive state;

step 2: the Inactive UE resides in the cell1, when cell reselection is performed, peripheral adjacent cells are scanned first, system information of the adjacent cells is read, and adjacent cells cell2, cell3, cell4 and cell5 are obtained, wherein the adjacent cells cell2, cell3 and cell4 are the same as the cell1 and also belong to RAN area ID1 or RAN area ID 2. The Inactive UE calculates the priorities (i.e. R values) of the cells 1-5 according to the R criterion, and further increases the offset of the priorities of the cells 1, 2, 3 and 4 belonging to the same RNA, so that the UE can more easily reselect the cell belonging to the RAN area ID1 or the RAN area ID2 for residence under the same priority.

For example, the signal quality cell5 of the neighboring cell measured by the inactive UE is the best, the cell2 times, and since the RNA region broadcasted by the cell2 is also the RNA region to which the inactive UE currently belongs, a priority offset is also added when calculating the R of the cell2, so that when the final priority is sorted, the priority of the cell2 is the highest, and the UE reselects the cell2 to reside.

Implementation mode 6: the network side equipment broadcasts the information of the RNA of the cell where the UE currently resides and a neighbor cell list belonging to the RNA, and corresponding priority offset is added for the cell of the RNA in the cell reselection process.

Assume that the RAN area ID of the RNA to which inactive UE belongs includes: { RAN area ID1 }.

Inactive UE resides in cell1, cell1 belongs to RAN area ID1, and adjacent cells are around cell 1: cell2, belonging to RAN area ID 1; cell3, belonging to RAN area ID 1; cell4, belonging to RAN area ID 2; cell5, belonging to RAN area ID 1; cell6, belonging to RAN area ID 3.

Step 1: the cell1 cell broadcasting system information comprises the RAN area ID1 and a neighbor cell list { cell2, cell3, cell5} of which RNA is also the RAN area ID1, and simultaneously broadcasts an offset suitable for an inactive state;

step 2: the Inactive UE resides in the cell1, performs cell reselection, and measures that the surrounding neighboring cells are cell2, cell4 and cell 6. According to the system information of the cell1, determining that the RNA region of the cell2 is the same as the RNA region to which the inactive UE currently belongs, when calculating the R value of the neighboring cell2, adding a corresponding offset, and certainly when calculating the R value of the current serving cell1, adding a corresponding offset. By the method, the cell with the largest R value is preferentially selected for camping, that is, the UE can reselect the cell2 more easily for camping or still keep camping in the cell 1.

Implementation mode 7: the network side equipment broadcasts the information of the RNA of the cell where the UE currently resides and a neighbor cell list which does not belong to the RNA, and corresponding offset is added for the cell of the RNA in the cell reselection process.

Assume that the RAN area ID of the RNA to which the inactive state UE belongs includes { RAN area ID1 }.

Step 1: the network side equipment broadcasts system information of the cell1, wherein the system information comprises RAN area ID1 to which the cell1 belongs and a neighbor cell list { cell4, cell6} of an RNA region which is not RAN area ID1, and simultaneously broadcasts an offset suitable for an inactive state, and the offset is used in a cell reselection process, if the cell is a cell of the same RNA as the cell1, corresponding priority offset is further increased in a priority calculation process;

step 2: the Inactive UE resides in the cell1, performs cell reselection, and measures that the surrounding neighboring cells are cell2, cell4 and cell 6. According to the system information of the cell1, determining that the current RNA areas of the cell4, the cell6 and the inactive UE are different, and the current RNA areas of the cell2 and the inactive UE are the same. Therefore, when calculating the R value of the neighboring cell2 based on the R criterion, the corresponding offset is increased, and certainly, when calculating the R value of the current serving cell1, the corresponding offset is also increased. In this way, under the same priority, the UE can more easily reselect to cell2 for camping or remain camping on cell 1.

Implementation mode 8: the method comprises the steps that network side equipment broadcasts information of RNA of a cell where UE currently resides, a neighbor cell list belonging to the RNA and other surrounding RNA regions and different priority offsets set for cells of different RNAs in a cell reselection process;

assume that the RNA area IDs of inactive UEs belong to two, including { RAN area ID1, RAN area ID2 }.

Step 1: the system information of the cell1 broadcasted by the network side equipment comprises:

the affiliated RAN area ID 1;

a neighbor cell list { cell2, cell3} belonging to RAN area ID1, corresponding offset 1;

a neighbor cell list { cell 4} belonging to a surrounding RAN area ID2, corresponding offset 2;

the neighbor cell list { cell5, cell6} belonging to the surrounding RAN area ID3 corresponds to the offset 3.

The offset amounts of offset1 and offset2 in the forward direction are larger than the offset amount of offset3 in the forward direction.

Step 2: the Inactive UE resides in the cell1, and when cell reselection is performed, firstly, the cell2, the cell3 and the cell4 are determined to be in an RNA region to which the Inactive UE currently belongs according to system information in the cell 1. The UE calculates the priorities (i.e., R values) of the neighboring cells cell 1-cell 6 based on the R criteria. In this process, a large positive correction is made to the priority of cell1, cell2 and cell3 based on offset1, a large positive correction is made to the priority of cell4 based on offset2, and a small positive or negative correction is made to the priority of cell5 based on offset 3. In this way, it is easier for the UE to reselect or stay camped on a cell belonging to the same RNA under the same priority.

It should be noted that, in the above implementation manners 1 to 8, the cell belonging to the same RNA as the current resident cell is preferentially selected for residence, and the scheme for preferentially selecting the cell belonging to the same slice as the current resident cell for residence is also applicable, and the principle is the same, and therefore, the description is omitted here.

Of course, the embodiment can also preferentially select the cell belonging to the same RNA and the same slice as the current resident cell for residence at the same time, and the implementation manner is as follows:

example 9: the network side equipment broadcasts the information of the RNA and the information of the slice of the cell where the UE currently resides, the neighbor cell lists belonging to the RNA area and other surrounding RNA areas, and the neighbor cell lists belonging to the slice and other surrounding slices.

Assume that the RAN area ID of the RNA to which the Inactive UE belongs includes two, namely { RAN area ID1, RAN area ID 2}, and the slice belongs to slice 1.

Inactive UE resides in cell1, wherein cell1 belongs to RAN area ID1, and the slice to which the Inactive UE belongs is slice 1. There are neighbor cells around cell 1: cell2, wherein RNA of the cell belongs to RAN area ID1, and a slice of the cell belongs to slice 1; cell3, whose RNA belongs to RAN area ID1, whose slice belongs to slice 2; cell4, whose RNA belongs to RAN area ID2, whose slice belongs to slice 2; cell5, whose RNA belongs to RAN area ID3, whose slice belongs to slice 1; cell6, whose RNA belongs to RAN area ID3, and whose slice belongs to slice 3.

Step 1: the network side equipment broadcasts the system information of the cell1, wherein the system information comprises the RAN area ID1, a neighbor cell list { cell2, cell3} belonging to the RAN area ID1, a neighbor cell list { cell 4} belonging to the surrounding RAN area ID2, and a neighbor cell list { cell5, cell6} belonging to the surrounding RAN area ID 3; the cell list belongs to a slice1, namely a neighbor cell list { cell2, cell5}, a neighbor cell list belonging to a slice 2, namely a neighbor cell list { cell3, cell 4}, and a neighbor cell list belonging to a slice 3, namely a neighbor cell list { cell6 }.

Step 2: when the Inactive UE resides in the cell1 and performs cell reselection, it is determined that the cells of which the RNA belongs to the RAN area ID1 and the slices belong to the slice1 are the cell1 and the cell2 according to the adjacent cell list, so that one cell is selected between the cell1 and the cell2 for residence based on the R criterion. If neither cell1 nor cell2 meets the requirement of the R criterion, a cell is selected to reside in a cell 3(cell 2 is excluded) of which the RNA belongs to the RAN area ID1, a cell4 of which the RNA belongs to the RAN area ID2 and a cell5 of which the slice belongs to slice1 based on the R criterion, and if the cell3, the cell4 and the cell5 still fail to meet the R criterion, cell reselection is performed according to an idle cell reselection rule, for example, the cell is reselected to a cell6 for residence finally.

Example 10: the network side equipment broadcasts the information of the RNA and the information of the slice of the cell where the UE currently resides, the neighbor cell lists belonging to the RNA area and other surrounding RNA areas, and the neighbor cell lists belonging to the slice and other surrounding slices. There is also an offset1 set for the same RNA belonging to the current resident cell, and an offset2 set for the same slice belonging to the current resident cell.

Inactive UE resides in cell1, wherein cell1 belongs to RAN area ID1, and the slice to which the Inactive UE belongs is slice 1. There are neighbor cells around cell 1: cell2, wherein RNA of the cell belongs to RAN area ID1, and a slice of the cell belongs to slice 1; cell3, whose RNA belongs to RAN area ID1, whose slice belongs to slice 2; cell4, whose RNA belongs to RAN area ID2, whose slice belongs to slice 2; cell5, whose RNA belongs to RAN area ID3, whose slice belongs to slice 1; cell6, whose RNA belongs to RANarea ID3, and whose slice belongs to slice 3.

Step 1: the network side equipment broadcasts the system information of the cell1, wherein the system information comprises the RAN area ID1, the neighbor cell list belonging to the RAN area ID1 is { cell2, cell3}, the neighbor cell list belonging to the surrounding RAN area ID2 is { cell 4}, and the neighbor cell list belonging to the surrounding RAN area ID3 is { cell5, cell6 }; the list of the adjacent cells belonging to slice1 is { cell2, cell5}, the list of the adjacent cells belonging to slice 2 is { cell3, cell 4}, and the list of the adjacent cells belonging to slice 3 is { cell6 }.

Step 2: the Inactive UE resides in the cell1, and when cell reselection is performed, the priority values of the cells 1 to 6 are calculated according to the R criterion and the priority offset, for example, the priority value is larger when the signal is better. Meanwhile, in the calculation process, the priority values of the cells cell1, cell2, cell3 and cell4 belonging to the RAN area ID1 and the RAN area ID2 are corrected in the forward direction according to the offset 1. Similarly, the priority values of the cells cell2 and cell5 belonging to the slice1 are corrected in the forward direction according to the offset 2. After the priority determination in this step is completed, assuming that the priority value of the cell2 which is corrected in the forward direction twice is the maximum, the cell2 may be selected as the target cell for camping.

On the other hand, an embodiment of the present invention further provides a user equipment, as shown in fig. 3, including:

a receiving module 31, configured to receive system information broadcasted by a cell, where the system information carries information of an RNA and/or information of a slice to which the cell belongs;

a selecting module 32, configured to preferentially select, as a target cell, a cell that is the same as an RNA and/or has the same slice as an RNA to which a cell where the user equipment currently resides belongs when cell reselection is needed;

and a camping module 33, configured to camp on the target cell.

Obviously, when reselecting a cell, the user equipment of this embodiment can preferentially select a cell that does not need RNA update and/or slice update as much as possible for camping, thereby reducing the update frequency of RNA and/or slice, further effectively reducing unnecessary signaling overhead generated by cell reselection, and ensuring user experience.

Specifically, the user equipment of this embodiment selects a target cell to camp on from candidate cells, where the candidate cell is obviously a cell that can be scanned by the user equipment, and may be one or multiple, and generally includes a current camping cell of the user equipment and neighboring cells adjacent to the current camping cell.

Therefore, the receiving module 31 of this embodiment specifically receives the system information broadcasted by the cell, and obtains the information of the RNA and/or the information of the slice to which the current cell belongs, and the information of the RNA and/or the information of the slice to which the neighboring cell adjacent to the current cell belongs;

correspondingly, the selecting module preferentially selects, as the target cell, a cell that is the same as an RNA and/or has the same slice as an RNA to which the current cell where the user equipment resides belongs, from among candidate cells, where the candidate cells include the current cell where the user equipment resides and the neighboring cells.

In practical application, the receiving module 31 of this embodiment may obtain the information of the RNA to which the current camped cell belongs and/or the information of the RNA to which the neighboring cell belongs in two ways;

one is the information of which cell's RNA, and is obtained from the system information broadcast by which cell. That is, the receiving module 31 of the present embodiment includes:

the first receiving submodule is used for receiving the system information broadcasted by the current resident cell, acquiring the information of the RNA and/or the information of the slice to which the current resident cell belongs from the system information broadcasted by the current resident cell, scanning the adjacent cell adjacent to the current resident cell, receiving the system information broadcasted by the adjacent cell, and acquiring the information of the RNA and/or the information of the slice to which the adjacent cell belongs from the system information broadcasted by the adjacent cell;

and the other method is to directly acquire the information of the RNAs of all candidate cells from the system information broadcasted by the current resident cell. That is, the receiving module 31 of the present embodiment includes:

the second receiving submodule is used for receiving the system information broadcasted by the current resident cell, and acquiring the system information broadcasted by the current resident cell: information of an RNA and/or a slice to which the current resident cell belongs, and information of an RNA and/or a slice to which a neighboring cell adjacent to the current resident cell belongs.

If the information of the RNA to which the current cell belongs is obtained from the system information broadcasted by the current cell and the information of the RNA to which the neighboring cell belongs is obtained from the system information broadcasted by the neighboring cell, the information of the RNA to which the current cell belongs at least includes: the RAN area ID of the RNA to which the current camping cell belongs, and the information of the RNA to which the neighboring cell belongs at least includes: RAN area ID of RNA to which neighbor cell belongs;

if the information of the RNA to which the current cell belongs and the information of the RNA to which the neighboring cell belongs are obtained from the system information broadcasted by the current cell, the information of the RNA to which the current cell belongs at least includes: RAN area ID of RNA to which the current camping cell belongs; the information on the RNA to which the neighboring cell belongs includes at least: a first list of neighbor cells belonging to the same RNA as the current resident cell and/or a second list of neighbor cells belonging to different RNAs as the current resident cell and/or a third list of neighbor cells to be classified according to RNA;

if the information of the slice to which the current cell belongs and the information of the slice to which the neighboring cell belongs are obtained from the system information broadcasted by the current cell, the information of the slice to which the current cell belongs at least includes: the ID of the slice to which the current resident cell belongs; the information of the slice to which the neighboring cell belongs at least includes: a fourth list of neighbor cells belonging to the same slice ID as the current camped cell and/or a fifth list of neighbor cells belonging to a different slice ID from the current camped cell and/or a sixth list of neighbor cells sorted by slice.

After determining the slice information and the RNA information, the selecting module 32 of this embodiment preferentially selects a cell, which is the same as the RNA to which the current cell where the ue resides, as the target cell from the candidate cells. The selection module 32 is described in detail below.

The selection module 32 of this embodiment has two ways to preferentially select cells of the same RNA and/or the same slice for camping.

One is to preferentially select a target cell from candidate cells belonging to the same RNA and/or the same slice as the current resident cell, and if the target cell cannot be selected, select the target cell from other candidate cells. That is, the selection module 32 of the present embodiment includes a first selection sub-module, and the first selection sub-module further includes:

the first selection unit is used for trying to select a cell meeting a preset first reselection condition as a target cell from candidate cells belonging to the same RNA as the current resident cell; and if the target cell meeting the preset first reselection condition cannot be selected, trying to select a cell meeting the preset second reselection condition as the target cell from candidate cells which belong to different RNAs from the current resident cell.

The second selection unit is used for trying to select a cell meeting a preset third reselection condition as a target cell from candidate cells belonging to the same slice as the current resident cell; and if the target cell meeting the preset third reselection condition cannot be selected, trying to select a cell meeting the preset fourth reselection condition as the target cell from candidate cells belonging to different slices from the current resident cell.

A third selecting unit, configured to attempt to select, as a target cell, a cell that satisfies a preset fifth reselection condition from candidate cells that belong to the same RNA and are in the same slice as the current resident cell; if the target cell meeting the preset fifth reselection condition cannot be selected, trying to select a cell meeting the preset sixth reselection condition as the target cell from candidate cells which belong to the same RNA and different slices as the current resident cell and/or candidate cells which belong to the same slice and different RNAs as the current resident cell; and if the target cell meeting the preset sixth reselection condition cannot be selected, trying to select a cell meeting the preset seventh reselection condition as the target cell from candidate cells which belong to different RNAs and different slices from the current resident cell.

Based on the first selection unit, the second selection unit, and the third selection unit, one preferred scheme of the first selection sub-module of this embodiment is to select a target cell from candidate cells belonging to the same RNA and the same slice as the current resident cell, if the target cell is not selected, then select the target cell from candidate cells belonging to the same RNA and different slices and/or different RNA in the same slice as the current resident cell, and if the target cell is not selected, then select the target cell from other candidate cells in which both RNA and slice are different from the current resident cell.

Another preferred selection scheme may be to set a priority offset, and determine the priority of each candidate cell based on the priority offset, where the priority offset may ensure that a candidate cell belonging to the same RNA and/or the same slice as the current resident cell has a higher priority than other candidate cells, so that a higher probability of becoming the target cell is obtained in the selection process. That is, the selection module 32 of the present embodiment further includes:

a second selection submodule for:

determining the priority of each candidate cell based on a preset rule; based on the RNA priority offset of the candidate cell, performing forward correction on the priority of the candidate cell belonging to the same RAN area ID as the current resident cell and/or performing reverse correction on the priority of the candidate cell belonging to different RAN area IDs from the current resident cell;

and/or

Based on slice priority offset of the candidate cell, performing forward correction on the priority of the candidate cell belonging to the same slice as the current resident cell and/or performing reverse correction on the priority of the candidate cell belonging to a different slice from the current resident cell;

On the basis, the user equipment of this embodiment may further include:

and the third receiving submodule is used for acquiring the RNA priority offset of the candidate cell and/or the slice priority offset from the system information broadcasted by the current resident cell.

That is, the user equipment of this embodiment may obtain the RNA priority offset and/or the slice priority offset of the candidate cell from the network side, thereby implementing real-time update of the priority offset.

Obviously, the user equipment of this embodiment corresponds to the above-mentioned cell reselection method applied to the user equipment provided by the present invention, and therefore the same technical effects can be achieved.

In addition, another embodiment of the present invention further provides a network side device, as shown in fig. 4, including:

a sending module 41, configured to send system information of a cell, where the system information carries information of an RNA to which the cell belongs and/or information of a slice to which the cell belongs.

Obviously, the network side device of this embodiment may indicate, through the broadcasted system information, that the user equipment of the present invention preferentially selects the cell that does not need to perform the RNA update and/or the slice update for camping when performing the cell reselection, so that the frequency of performing the RNA update and/or the slice update by the user equipment can be effectively reduced, thereby effectively reducing unnecessary signaling overhead generated by the cell reselection, and ensuring user experience.

Obviously, the network side device of this embodiment corresponds to the above cell reselection method applied to the network side device provided by the present invention, and therefore the same technical effects can be achieved.

Furthermore, the present invention also provides a readable storage medium storing a computer program, which when executed by a processor, may include the steps of:

and residing in the target cell.

Specifically, the step of the processor executing the system information of receiving the cell broadcast further comprises:

receiving system information broadcasted by a current resident cell, acquiring information and/or sliced information of an RNA (ribonucleic acid) to which the current resident cell belongs from the system information broadcasted by the current resident cell, scanning an adjacent cell adjacent to the current resident cell, receiving the system information broadcasted by the adjacent cell, and acquiring the information and/or sliced information of the RNA to which the adjacent cell belongs from the system information broadcasted by the adjacent cell;

or

Receiving system information broadcasted by the current resident cell, and acquiring the system information broadcasted by the current resident cell: information of an RNA and/or a slice to which the current resident cell belongs, and information of an RNA and/or a slice to which a neighboring cell adjacent to the current resident cell belongs.

In addition, the step of the processor executing to preferentially select a cell which is the same as the RNA and/or the same as the slice to which the cell currently camped by the user equipment belongs as the target cell further comprises:

trying to select a cell meeting a preset first reselection condition as a target cell from candidate cells belonging to the same RNA as the current resident cell; if the target cell meeting the preset first reselection condition cannot be selected, trying to select a cell meeting a preset second reselection condition as the target cell from candidate cells which belong to different RNAs with the current resident cell;

alternatively, the first and second electrodes may be,

trying to select a cell meeting a preset third reselection condition as a target cell from candidate cells belonging to the same slice as the current resident cell; and if the target cell meeting the preset third reselection condition cannot be selected, trying to select a cell meeting the preset fourth reselection condition as the target cell from candidate cells belonging to different slices from the current resident cell.

Alternatively, the first and second electrodes may be,

trying to select a cell which meets a preset fifth reselection condition as a target cell from candidate cells which belong to the same RNA and are in the same slice as the current resident cell; if the target cell meeting the preset fifth reselection condition cannot be selected, trying to select a cell meeting the preset sixth reselection condition as the target cell from candidate cells which belong to the same RNA and different slices as the current resident cell and/or candidate cells which belong to the same slice and different RNAs as the current resident cell; and if the target cell meeting the preset sixth reselection condition cannot be selected, trying to select a cell meeting the preset seventh reselection condition as the target cell from candidate cells which belong to different RNAs and different slices from the current resident cell.

In addition, the step of the processor performing to preferentially select a cell which is the same as the RNA and/or the same as the slice to which the cell currently camped by the user equipment belongs as the target cell may further include:

determining the priority of each candidate cell based on a preset rule;

and/or

In addition, an embodiment of the present invention further provides a user equipment, as shown in fig. 5, including:

a memory 51, a processor 52, a bus interface 53, and a transceiver 54. The bus interface 53 may comprise any number of interconnected buses and bridges, with various circuits linking together one or more processors, represented by processor 52, and memory, represented by memory 51. The architecture of the bus interface 53 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. Further, the transceiver 54 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium.

The memory 51 stores a computer program, and the processor 52 reads the computer program in the memory 51 to execute:

and residing in the target cell.

Specifically, the processor 52, based on the computer program, performs the step of receiving the system information broadcasted by the cell, further comprising:

or

Furthermore, the processor 52, based on the computer program, performs the step of preferentially selecting a cell with the same RNA and/or the same slice as the cell where the ue currently camps as the target cell, further comprising:

alternatively, the first and second electrodes may be,

Alternatively, the first and second electrodes may be,

Moreover, as another possible solution, the step of executing, by the processor 52 of this embodiment, based on the computer program, to preferentially select, as the target cell, a cell that is the same as and/or has the same slice as the RNA to which the cell where the user equipment currently camps belongs may further include:

determining the priority of each candidate cell based on a preset rule;

based on the RNA priority offset of the candidate cell, performing forward correction on the priority of the candidate cell belonging to the same RAN area ID as the current resident cell and/or performing reverse correction on the priority of the candidate cell belonging to a different RAN area ID from the current resident cell;

and/or

While the foregoing is directed to the preferred embodiment of the present invention, 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 as defined in the appended claims.

Claims

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

receiving system information broadcasted by a cell, wherein the system information carries information of an RNA (ribonucleic acid) to which the cell belongs;

when cell reselection is needed, preferentially selecting a cell which is the same as the RNA of the cell where the user equipment currently resides as a target cell;

camping on the target cell;

the step of receiving the system information broadcasted by the cell includes: receiving system information broadcasted by a cell, and acquiring information of RNA and information of slices belonging to a current resident cell, and information of RNA and information of slices belonging to adjacent cells adjacent to the current resident cell;

the step of preferentially selecting the cell which is the same as the RNA of the cell where the user equipment currently resides as the target cell comprises the following steps: preferentially selecting a cell which is the same as the RNA of a cell where the user equipment currently resides as a target cell from candidate cells, wherein the candidate cells comprise the current resident cell and the adjacent cell;

the step of preferentially selecting a cell, which is the same as the RNA to which the cell currently camped by the user equipment belongs, as the target cell in the candidate cells includes:

and

and acquiring the RNA priority offset and the slice priority offset of the candidate cell from the system information broadcasted by the current resident cell.

2. The cell reselection method of claim 1,

the receiving system information broadcasted by the cell, obtaining information of an RNA to which a current resident cell belongs, and information of an RNA to which a neighboring cell adjacent to the current resident cell belongs, includes:

receiving system information broadcasted by a current resident cell, acquiring information of an RNA (ribonucleic acid) to which the current resident cell belongs from the system information broadcasted by the current resident cell, scanning an adjacent cell adjacent to the current resident cell, receiving the system information broadcasted by the adjacent cell, and acquiring the information of the RNA to which the adjacent cell belongs from the system information broadcasted by the adjacent cell;

or

Receiving system information broadcasted by a current resident cell, and acquiring the system information broadcasted by the current resident cell: information of an RNA to which the current resident cell belongs, and information of an RNA to which a neighboring cell adjacent to the current resident cell belongs.

3. The cell reselection method of claim 2,

if the information of the RNA to which the current cell belongs and the information of the RNA to which the neighboring cell belongs are obtained from the system information broadcasted by the current cell, the information of the RNA to which the current cell belongs at least includes: RAN area ID of RNA to which the current camping cell belongs; the information of the RNA to which the neighbor cell belongs at least includes: a first list of neighbor cells belonging to the same RNA as the current resident cell and/or a second list of neighbor cells belonging to different RNAs as the current resident cell and/or a third list of neighbor cells to be classified according to RNA.

4. The cell reselection method of claim 3,

the receiving of the system information broadcasted by the cell further includes:

receiving system information broadcasted by a current resident cell, acquiring information of a slice to which the current resident cell belongs from the system information broadcasted by the current resident cell, scanning an adjacent cell adjacent to the current resident cell, receiving the system information broadcasted by the adjacent cell, and acquiring information of the slice to which the adjacent cell belongs from the system information broadcasted by the adjacent cell; wherein, the information of the slice to which the current camping cell belongs at least comprises: the ID of the slice to which the current camping cell belongs, and the information of the slice to which the neighboring cell belongs at least includes: ID of the slice to which the neighbor cell belongs;

or

Receiving system information broadcasted by a current resident cell, and acquiring the system information broadcasted by the current resident cell: information of a slice to which the current camped cell belongs and information of a slice to which a neighboring cell adjacent to the current camped cell belongs; wherein, the information of the slice to which the current camping cell belongs at least comprises: the ID of the slice to which the current resident cell belongs; the information of the slice to which the neighbor cell belongs at least includes: a fourth list of neighbor cells belonging to the same slice ID as the current camped cell and/or a fifth list of neighbor cells belonging to different slice IDs as the current camped cell and/or a sixth list of neighbor cells sorted by slice.

5. The cell reselection method of claim 1,

the step of preferentially selecting a cell, which is the same as the RNA of the cell where the user equipment currently resides, as a target cell from the candidate cells includes:

6. The cell reselection method of claim 1,

the receiving system information broadcasted by the cell, acquiring information of an RNA to which a current resident cell belongs and information of an RNA to which a neighboring cell adjacent to the current resident cell belongs, includes:

the system information broadcasted by the receiving cell acquires the information of the RNA and the information of the slice to which the current resident cell belongs, and the information of the RNA and the information of the slice to which the adjacent cell adjacent to the current resident cell belongs;

7. A cell reselection method is applied to network side equipment, and is characterized by comprising the following steps:

the method comprises the steps that network side equipment broadcasts and sends system information of a cell, wherein the system information carries information of an RNA (ribonucleic acid) to which the cell belongs and an RNA priority offset of the cell, and the system information is used for preferentially selecting the cell which is the same as the RNA to which the cell where the user equipment currently resides as a target cell when the user equipment needs to reselect the cell;

the preferentially selecting the cell which is the same as the RNA of the cell where the user equipment currently resides as the target cell comprises the following steps:

determining the priority of each candidate cell based on a preset rule;

and

the candidate cells comprise a current resident cell of the user equipment and a neighbor cell adjacent to the current resident cell;

the system information also carries:

RNA priority bias and slice priority bias for candidate cells.

8. The cell reselection method of claim 7,

the information of the RNA to which the cell belongs at least comprises: RAN area ID of RNA to which the cell belongs.

9. The cell reselection method of claim 7,

the system information also carries: and the system information is used for preferentially selecting a cell which is the same as the RNA and the slice to which the cell currently resided belongs as a target cell when the user equipment needs to perform cell reselection.

10. The cell reselection method of claim 9,

11. The cell reselection method of claim 9,

the system information also carries information of RNA and/or information of slices to which neighbor cells adjacent to the cell belong.

12. The cell reselection method of claim 11,

the information of the RNA to which the neighboring cell belongs, which is carried by the system information, at least comprises:

a fourth list of neighbor cells belonging to the same slice ID as the cell and/or a fifth list of neighbor cells belonging to a different slice ID from the cell and/or a sixth list of neighbor cells sorted by slice.

13. A user device, comprising:

a receiving module, configured to receive system information broadcasted by a cell, where the system information carries information of an RNA to which the cell belongs;

the selection module is used for preferentially selecting a cell which is the same as the RNA of the cell where the user equipment currently resides as a target cell when the cell is required to be reselected;

a resident module, configured to reside in the target cell;

the receiving module specifically receives system information broadcasted by a cell, and obtains information of RNA and information of slices belonging to a current resident cell, and information of RNA and information of slices belonging to adjacent cells adjacent to the current resident cell;

the selection module preferentially selects a cell which is the same as the RNA of the current resident cell of the user equipment as a target cell from candidate cells, wherein the candidate cells comprise the current resident cell and the adjacent cell;

the selection module comprises:

a second selection submodule for:

and

based on slice priority offset of the candidate cell, performing forward correction on the priority of the candidate cell belonging to the same slice as the current resident cell and/or performing reverse correction on the priority of the candidate cell belonging to a different slice from the current resident cell; the receiving module further comprises:

and the third receiving submodule is used for acquiring the RNA priority offset and the slice priority offset of the candidate cell from the system information broadcasted by the current resident cell.

14. The user equipment of claim 13,

the receiving module includes:

the first receiving submodule is used for receiving system information broadcasted by a current resident cell, acquiring information of an RNA (ribonucleic acid) to which the current resident cell belongs from the system information broadcasted by the current resident cell, scanning an adjacent cell adjacent to the current resident cell, receiving system information broadcasted by the adjacent cell, and acquiring information of the RNA to which the adjacent cell belongs from the system information broadcasted by the adjacent cell;

or

A second receiving submodule, configured to receive system information broadcasted by a current camped cell, and obtain, from the system information broadcasted by the current camped cell: information of an RNA to which the current resident cell belongs, and information of an RNA to which a neighboring cell adjacent to the current resident cell belongs.

15. The user equipment of claim 14,

16. The user equipment of claim 15,

the first receiving submodule is further configured to obtain information of a slice to which the current camped cell belongs from the system information broadcast by the current camped cell, scan an adjacent cell adjacent to the current camped cell, receive the system information broadcast by the adjacent cell, and obtain information of a slice to which the adjacent cell belongs from the system information broadcast by the adjacent cell; wherein, the information of the slice to which the current camping cell belongs at least comprises: the ID of the slice to which the current camping cell belongs, and the information of the slice to which the neighboring cell belongs at least includes: ID of the slice to which the neighbor cell belongs;

or

The second receiving submodule is further configured to obtain, from the system information broadcast by the current camped cell: information of a slice to which the current camped cell belongs and information of a slice to which a neighboring cell adjacent to the current camped cell belongs; wherein, the information of the slice to which the current camping cell belongs at least comprises: the ID of the slice to which the current resident cell belongs; the information of the slice to which the neighbor cell belongs at least includes: a fourth list of neighbor cells belonging to the same slice ID as the current camped cell and/or a fifth list of neighbor cells belonging to different slice IDs as the current camped cell and/or a sixth list of neighbor cells sorted by slice.

17. The user equipment of claim 13,

the selection module comprises:

a first selection submodule comprising:

18. The user equipment of claim 13,

the receiving module is specifically configured to receive system information broadcasted by a cell, and acquire information of an RNA and information of a slice to which a current resident cell belongs, and information of an RNA and information of a slice to which an adjacent cell adjacent to the current resident cell belongs;

the selection module comprises:

a first selection submodule comprising:

19. A network-side device, comprising:

a sending module, configured to send system information of a cell, where the system information carries information of an RNA to which the cell belongs and an RNA priority offset of the cell, and the system information is used for a user equipment to preferentially select, when the user equipment needs to perform cell reselection, a cell that is the same as an RNA to which a cell where the user equipment currently resides is used as a target cell;

determining the priority of each candidate cell based on a preset rule;

and

the system information also carries:

RNA priority bias and slice priority bias for candidate cells.

20. The network-side device of claim 19,

21. The network-side device of claim 19,

22. The network-side device of claim 21,

23. The network-side device of claim 19,

24. The network-side device of claim 23,

the information of the slice to which the neighbor cell belongs at least includes: a fourth list of neighbor cells belonging to the same slice ID as the cell and/or a fifth list of neighbor cells belonging to a different slice ID from the cell and/or a sixth list of neighbor cells sorted by slice.