CN108471617B

CN108471617B - Mobility management method of user equipment, user equipment and measurement control point base station

Info

Publication number: CN108471617B
Application number: CN201710099783.7A
Authority: CN
Inventors: 杨阳; 晋英豪; 谭巍
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-02-23
Filing date: 2017-02-23
Publication date: 2020-12-08
Anticipated expiration: 2037-02-23
Also published as: WO2018153115A1; CN108471617A

Abstract

The embodiment of the application discloses a mobility management method of user equipment. A measurement control point base station sends a first measurement request to one or more measurement base stations, wherein the measurement request is used for indicating to measure an uplink tracking signal of user equipment; and the measurement control point base station determines a potential target cell of the user equipment according to a measurement result generated by the measurement control point base station and/or a measurement result returned by the measurement base station, wherein the measurement result is generated based on an uplink tracking signal sent by the user equipment. The embodiment of the application discloses user equipment and a measurement control point base station.

Description

Mobility management method of user equipment, user equipment and measurement control point base station

Technical Field

The present application relates to the field of communications, and in particular, to a mobility management method for a user equipment, and a measurement control point base station.

Background

In the 3rd Generation Partnership Project (3 GPP) Long Term Evolution (LTE) technology, a User Equipment (UE) has two states at a Radio Resource Control (RRC) protocol layer, namely a Radio Resource Control IDLE (RRC _ IDLE) state and a Radio Resource Control CONNECTED (RRC _ CONNECTED) state. When the user equipment initiates frequent packet traffic, the UE transitions from RRC _ IDLE state to RRC _ CONNECTED state resulting in a large amount of signaling overhead. When the ue is in the RRC _ CONNECTED state, it needs to continuously perform measurement and report various types of information to the network, which results in a problem of large energy consumption.

In order to reduce signaling overhead, reduce power consumption, and shorten delay, in the current research of the third Generation Partnership Project (3 GPP) fifth Generation mobile communication technology (5-Generation, 5G), the RRC protocol layer introduces a new state: radio Resource Control idle state (RRC _ INACTIVE).

The UE in RRC _ INACTIVE state may not notify the network when moving within a radio access notification Area (RNA), and may need to notify the network when moving to another RNA, which may include one or more cells that may not be under the same base station. How to manage mobility of the UE in the RRC _ INACTIVE state is an issue under discussion. Some currently discussed schemes propose schemes based on downlink signal measurement, but these schemes have the problems that the time delay is large and the 5G requirement is difficult to meet, and the signaling overhead is large.

Disclosure of Invention

The embodiment of the application provides a mobility management method of user equipment, the user equipment and a measurement control point base station, which are used for solving the problems of large time delay and large signaling overhead of the existing UE mobility management scheme.

In a first aspect, an embodiment of the present application provides a mobility management method for a user equipment, including: the measurement control point base station firstly sends a measurement request to one or more measurement base stations, wherein the measurement request is used for indicating the measurement of the uplink TS of the UE. The measurement base station refers to a base station to which a measurement cell capable of receiving the TS of the UE belongs; and then determining a potential target cell of the UE according to a measurement result generated by the UE and/or a measurement result returned by the measurement base station, wherein the measurement result is generated based on an uplink TS sent by the UE. In the process, the network side does not need to perform frequent signaling interaction with the UE, so that air interface resources are saved. Because the network side can timely acquire the position of the UE, when downlink service arrives or the state changes, the network side can quickly establish connection with the UE, and extra time delay is avoided.

In one possible design, the measurement control point base station is a base station to which a camping cell of the UE belongs, or a base station to which an anchor cell of the UE belongs.

In a possible design, the first measurement request carries measurement control point indication information, where the measurement control point indication information is used to indicate that the measurement control point base station is a base station to which an anchor cell of the user equipment belongs or a base station to which a camping cell of the user equipment belongs.

In another possible design, after determining a potential target cell of the ue, the measurement control point base station sends a second measurement request to a base station to which the potential target cell belongs, where the second measurement request carries the measurement control point indication information.

In another possible design, the first measurement request and the second measurement request further carry at least one of a measurement duration, a signal quality threshold, and measurement control information, where the measurement control information includes at least one of a terminal identifier, a measurement period, a measurement reporting condition, and a tracking signal of the ue.

In another possible design, the potential target cell and the camping cell are located in the same RNA, and after the sending of the second measurement request, the measurement control point base station receives a measurement result sent by a base station to which the potential target cell belongs, where the measurement result sent by the potential target cell is generated by the base station to which the potential target cell belongs based on an uplink tracking signal sent by the user equipment and received in the potential target cell; and the measurement control point base station determines whether the user equipment needs to change the resident cell according to the measurement result sent by the base station to which the potential target cell belongs.

In another possible design, the measurement control point base station is a base station to which a camped cell of the user equipment belongs, and the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the camped cell of the user equipment belongs.

In another possible design, when the ue needs to change the camping cell, the measurement control point base station sends a first camping cell change instruction to the base station to which the potential target cell belongs, where the first camping cell change instruction is used to notify that the potential target cell is the camping cell of the ue after the camping cell is changed.

And the measurement control point base station informs the base station UE to which the potential target cell belongs of the resident cell change to the potential target cell through the first resident cell change instruction.

In another possible design, the first camped cell change indication carries at least one of an identifier of the potential target cell, paging information, a cell list of the RNA, and measurement information, where the measurement information includes at least one of a measurement cell identifier, a measurement duration, a measurement threshold, and an information reporting condition.

And the base station to which the potential target cell belongs becomes a new measurement control point base station of the UE after the resident cell is changed, and the measurement result of the UE is controlled according to the information carried in the first resident cell change instruction.

In another possible design, when the ue needs to change the camping cell, the measurement control point base station sends a second camping cell change instruction to the measurement base station, where the second camping cell change instruction is used to notify the camping cell of the ue after the potential target cell is used as the changed camping cell.

And the measurement control point base station informs the measurement base station UE of the change of the resident cell into the potential target cell through the second resident cell change instruction.

In another possible design, the second camping cell change indication carries an identifier of the potential target cell.

In another possible design, the measurement control point base station is also a base station to which an anchor cell of the user equipment belongs.

In another possible design, the measurement control point base station is not a base station to which an anchor cell of the user equipment belongs.

In another possible design, when the ue needs to change the camping cell, the measurement control point base station sends a third camping cell change instruction to the base station to which the anchor cell of the ue belongs, where the third camping cell change instruction is used to notify the camping cell of the ue after the potential target cell is used as the changed camping cell.

And the measurement control point base station informs the base station UE to which the anchor point cell belongs of the change of the resident cell to the potential target cell through the third resident cell change instruction, so that the base station to which the anchor point cell belongs can timely know the updating condition of the current resident cell of the UE.

In another possible design, the third camping cell change indication carries an identifier of the potential target cell.

In another possible design, when the ue needs to change the camping cell, the measurement control point base station sends a first message to the ue, where the first message is used to instruct the ue to change from synchronizing or monitoring the broadcast channel and the paging channel of the camping cell to synchronizing or monitoring the broadcast channel and the paging channel of the potential target cell.

In another possible design, the first message carries a change status indicator and an identifier of the potential target cell, where the change status indicator is used to instruct the ue to change a cell that is a synchronization or listening object of a broadcast channel and a paging channel.

Through the first message, the UE can timely acquire the change condition of the resident cell of the UE, and the resident cell change can be completed only by sending a message to the UE by the network side, so that air interface resources can be saved.

In another possible design, before determining whether the ue needs to change the camping cell, the measurement control point base station sends, to the ue, a first message according to a measurement result sent by the base station to which the potential target cell belongs, where the first message is used to instruct the ue to synchronize or monitor a broadcast channel and a paging channel of the potential target cell on the basis of continuing to synchronize or monitor the broadcast channel and the paging channel of the camping cell.

In another possible design, the first message carries an addition status indicator and an identifier of the potential target cell, where the addition status indicator is used to instruct the ue to add a cell that is a synchronization or listening object of a broadcast channel and a paging channel.

Through the first message, the UE can timely acquire the change condition of the resident cell of the UE, and the mode enables the UE to synchronously monitor the broadcast channel and the paging channel of the resident cell and the broadcast channel and the paging channel of the potential target cell in advance, so that the reliability of the UE for receiving the paging message is improved.

In another possible design, the measurement control point base station is a base station to which an anchor cell of the user equipment belongs, and the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the anchor cell of the user equipment belongs.

In another possible design, the measurement control point base station is also a base station to which an original cell of the ue belongs, where the original cell refers to a cell in which the ue resides before the determination that the ue needs to change the cell in which the ue resides.

In another possible design, when the ue needs to change the camping cell, the measurement control point base station sends a first message to the ue, where the first message is used to instruct the ue to change from synchronizing or monitoring the broadcast channel and the paging channel of the original camping cell to synchronizing or monitoring the broadcast channel and the paging channel of the potential target cell.

In another possible design, before determining whether the ue needs to change the camping cell, the measurement control point base station sends a first message to the ue according to a measurement result sent by a base station to which the potential target cell belongs, where the first message is used to instruct the ue to synchronize or monitor a broadcast channel and a paging channel of the potential target cell on the basis of continuing to synchronize or monitor the broadcast channel and the paging channel of the original camping cell; when the user equipment is determined to need to change the resident cell, the measurement control point base station sends a second message to the user equipment, wherein the second message is used for indicating that the user equipment is no longer synchronous or monitoring a broadcast channel and a paging channel of the original resident cell.

In another possible design, the first message carries an addition status indicator and an identifier of the potential target cell, where the addition status indicator is used to instruct the ue to add a cell that is a synchronization or listening object of a broadcast channel and a paging channel; the second message carries a status deletion indicator and an identifier of the original resident cell, wherein the deletion status indicator is used for indicating the user equipment to delete the cell which is a synchronization or monitoring object of a broadcast channel and a paging channel.

In another possible design, the measurement control point base station is not a base station to which an original cell of the ue belongs, where the original cell refers to a cell in which the ue resides before the determination that the ue needs to change the cell in which the ue resides.

In another possible design, when the ue needs to change the camping cell, the measurement control point base station sends a first camping cell change instruction to the base station to which the original camping cell belongs, where the first camping cell change instruction is used to notify the camping cell of the ue after the potential target cell is used as the changed camping cell.

In another possible design, the first camped cell change indication carries an identifier of the potential target cell.

In another possible design, the first camped cell change indication is further configured to notify that a first message is sent to the ue, where the first message is used to indicate that the ue changes from synchronizing or monitoring the broadcast channel and the paging channel of the camped cell to synchronizing or monitoring the broadcast channel and the paging channel of the potential target cell.

In another possible design, the first camped cell change indication further carries paging information.

In another possible design, before determining whether the ue needs to change the camping cell, the measurement control point base station sends, according to a measurement result sent by the base station to which the camping cell of the ue belongs, a first message to the ue through the base station to which the camping cell of the ue belongs, where the first message is used to instruct the ue to synchronize or monitor a broadcast channel and a paging channel of the potential target cell on the basis of continuing to synchronize or monitor the broadcast channel and the paging channel of the camping cell;

when it is determined that the ue needs to change the camping cell, the measurement control point base station sends a second message to the ue through the base station to which the potential target cell belongs, where the second message is used to indicate that the ue is no longer synchronized or monitor the broadcast channel and the paging channel of the original camping cell.

In another possible design, the potential target cell and the camping cell are located in different RNAs, and after the sending of the second measurement request, the measurement control point base station receives a collision indication sent by a base station to which the potential target cell belongs, where the collision indication carries an identifier of the user equipment, and the collision indication is used to indicate that an uplink tracking signal sent by the user equipment is not available in the RNA in which the potential target cell is located; and after receiving the conflict indication, the measurement control point base station sends a first message to the user equipment, wherein the first message is used for indicating the user equipment to start measurement on a downlink signal of a resident cell of the user equipment, and initiates a radio resource control reconfiguration process according to a measurement result of the downlink signal. Therefore, the mobility of the UE is managed in the moving process of the UE across the RNA.

In another possible design, the measurement control point base station sends a measurement change instruction to the base station to which the anchor cell of the user equipment belongs, where the measurement change instruction is used to notify the base station to which the anchor cell of the user equipment belongs that the measurement mode of the user equipment is changed to perform measurement on the downlink signal.

In another possible design, the measurement change indication carries an identity of the user equipment.

In another possible design, the potential target cell and the camping cell are located in different RNAs, and after the sending of the second measurement request, the measurement control point base station receives a measurement result sent by a base station to which the potential target cell belongs;

and the measurement control point base station sends a first message to the user equipment according to a measurement result sent by the base station to which the potential target cell belongs, wherein the first message is used for indicating the user equipment to start measurement on a downlink signal of a resident cell of the user equipment, and a radio resource control reconfiguration process is initiated according to the measurement result of the downlink signal.

In another possible design, the measurement control point base station is a base station to which an anchor cell of the user equipment belongs.

In another possible design, the measurement control point base station is a base station to which an anchor cell of the user equipment belongs, and the measurement control point base station is not a base station to which a camping cell of the user equipment belongs, and the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the anchor cell of the user equipment belongs.

In another possible design, the potential target cell and the camping cell are located in different RNAs, and after the sending of the second measurement request, the measurement control point base station receives a collision indication sent by a base station to which the potential target cell belongs, where the collision indication carries an identifier of the user equipment, and the collision indication is used to indicate that an uplink tracking signal sent by the user equipment is not available in the RNA in which the potential target cell is located; and after receiving the conflict indication, the measurement control point base station sends a first message to the user equipment through a base station to which the resident cell of the user equipment belongs, wherein the first message is used for indicating the user equipment to start downlink measurement on the resident cell of the user equipment, and a radio resource control reconfiguration process is initiated according to a downlink measurement result.

and the measurement control point base station sends a first message to the user equipment through the base station to which the resident cell of the user equipment belongs according to the measurement result sent by the base station to which the potential target cell belongs, wherein the first message is used for indicating the user equipment to start measuring the downlink signal of the resident cell of the user equipment, and a radio resource control reconfiguration process is initiated according to the measurement result of the downlink signal.

In another possible design, the first message carries a downlink measurement indicator.

In another possible design, the first message is further used to instruct the ue to start measurement on downlink signals of a cell where the ue resides and the potential target cell, and initiate a radio resource control reconfiguration procedure according to measurement results of the downlink signals of the cell where the ue resides and the potential target cell.

In another possible design, the first message further carries an addition status indicator and an identifier of the potential target cell, where the addition status indicator is used to indicate that the ue adds a cell serving as a measurement object of a downlink reference signal.

In another possible design, if the resources do not conflict, the base station to which the potential target cell belongs sends the measurement result to the anchor base station, and the anchor base station determines whether the measurement change condition is satisfied according to the measurement result sent by the base station to which the potential target cell belongs.

In another possible design, the anchor base station sends a paging message to the UE if the measurement change condition is met. If the measurement change condition is not satisfied, the anchor base station continues to receive the measurement results from each measurement base station until the measurement change condition is satisfied according to the obtained measurement results

In a second aspect, an embodiment of the present application provides a mobility management method for a user equipment, including:

the method comprises the steps that user equipment receives a first message at a first moment, wherein the first message is used for indicating the user equipment to synchronize or monitor a broadcast channel and a paging channel of a first potential target cell, and the first potential target cell and a resident cell of the user equipment at the first moment are in the same radio access notification area (RNA); and the user equipment synchronizes or monitors a broadcast channel and a paging channel of the first potential target cell according to the first message.

In one possible design, the first message is used to instruct the ue to change from synchronizing or monitoring the broadcast channel and the paging channel of the camping cell at the first time to synchronizing and monitoring the broadcast channel and the paging channel of the first potential target cell.

In another possible design, the first message carries a change status indicator and an identifier of the first potential target cell, where the change status indicator is used to instruct the ue to change a cell that is a synchronization or listening object of a broadcast channel and a paging channel.

In another possible design, the first message is used to instruct the ue to synchronize or monitor the broadcast channel and the paging channel of the first potential target cell based on continuing to synchronize or monitor the broadcast channel and the paging channel of the camping cell at the first time.

In another possible design, the first message carries an addition status indicator and an identifier of the first potential target cell, where the addition status indicator is used to instruct the ue to add a cell that is a synchronization or listening object of a broadcast channel and a paging channel.

In another possible design, after the ue synchronizes or listens to the broadcast channel and the paging channel of the first potential target cell on the basis of continuing to synchronize or listen to the broadcast channel and the paging channel of the camped cell at the first time, the ue receives a second message at a second time, where the second message is used to indicate that the ue is no longer synchronized or listens to the broadcast channel and the paging channel of the camped cell at the first time.

In another possible design, the second message carries a deletion status indicator and an identifier of a resident cell at the first time, where the deletion status indicator is used to indicate the ue to delete a cell that is a synchronization or monitoring object of a broadcast channel and a paging channel.

In another possible design, the ue receives a third message at a third time, where the third message is used to instruct the ue to start measurement on the camping cell at the third time and downlink signals of neighboring cells of the camping cell at the third time; the user equipment starts to measure the resident cell at the third moment and downlink signals of adjacent cells of the resident cell at the third moment according to the third message; and the user equipment initiates a radio resource control reconfiguration process when meeting the cell reselection condition according to the measurement result of the downlink signal.

In another possible design, the third message carries a downlink measurement indicator.

In another possible design, the third message is further used to instruct the ue to initiate measurement of a downlink signal of a second potential target cell, where the second potential target cell is at a different RNA from the camping cell at the third time; after the user equipment receives the third message, the user equipment starts to measure the downlink signal of the second potential target cell according to the third message; and the user equipment initiates a radio resource control reconfiguration request when meeting cell reselection conditions according to the measurement results of the downlink reference signals of the resident cell at the third moment, the neighboring cells of the resident cell at the third moment and the second potential target cell.

In one possible design, the third message further carries an added status indicator and an identity of the second potential target cell.

In a third aspect, the present application provides a base station, where the base station includes one or more transceivers and one or more processors, and is configured to implement the steps in the mobility management method for the user equipment provided in the first aspect.

In a fourth aspect, the present application provides a user terminal, including: the device comprises a processor, a memory, a transceiver and an input/output device, wherein the processor is mainly used for processing a communication protocol and communication data, controlling the whole user equipment, executing a software program and processing data of the software program. The memory is used primarily for storing software programs and data. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The transceiver comprises a control circuit and an antenna and is mainly used for transceiving radio frequency signals in the form of electromagnetic waves. The processor, the memory, the transceiver and the input/output device are used to implement the steps in the mobility management method of the user equipment provided by the second aspect.

In a fifth aspect, the present application provides a mobility management system for a user equipment, including a measurement control point base station and one or more measurement base stations, where the measurement control point base station is configured to send a first measurement request to the one or more measurement base stations, and the measurement request is used to instruct to measure an uplink tracking signal of the user equipment; determining a potential target cell of the user equipment according to a measurement result generated by the user equipment and/or a measurement result returned by the measurement base station, wherein the measurement result is generated based on an uplink tracking signal sent by the user equipment; and the measurement base station is configured to receive the first measurement request, measure an uplink tracking signal of the user equipment according to the first measurement request, and send a measurement result obtained by measurement to the measurement control point base station.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

FIG. 1 is a schematic diagram of an uplink measurement provided herein;

FIG. 2 is a schematic diagram of the structure of an RNA provided herein;

fig. 3 is a flowchart illustrating a mobility management method of a UE according to an embodiment of the present application;

fig. 4 is a schematic diagram of a network environment to which a state management method according to an embodiment of the present application is applied;

FIG. 5 is a flow chart illustrating a method for state management according to an embodiment of the present application;

FIG. 6 is a flow chart illustrating a method for state management according to another embodiment of the present application;

FIG. 7 is a flow chart illustrating a method for state management according to another embodiment of the present application;

FIG. 8 is a flow chart illustrating a method for state management according to another embodiment of the present application;

FIG. 9 is a flow chart illustrating a method for state management according to another embodiment of the present application;

FIG. 10 is a flow chart illustrating a method for state management according to another embodiment of the present application;

FIG. 11 is a flow chart illustrating a method for state management according to another embodiment of the present application;

FIG. 12 is a flow chart illustrating a method for state management according to another embodiment of the present application;

fig. 13 is a schematic structural diagram of a base station device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a UE according to an embodiment of the present application.

Detailed Description

In the discussion of the 5G standard, it is assumed that the mobility of the UE is managed based on uplink measurements. Fig. 1 is a schematic diagram of uplink measurements. RNA1 contains 4 CELLs, respectively CELL1, CELL2, CELL3 and CELL 4. RNA2 contains 4 CELLs, respectively CELL 5, CELL 6, CELL 7 and CELL 8. The UE sends an Uplink (UL) Tracking Signal (TS) to the network, which uniquely corresponds to one UE in the RNA range. The network determines the position of the UE according to the Transmission/Reception Point (TRP) where the received TS is located, and when the network detects that the UE moves to other RNA, the network informs the UE to perform reconfiguration of related parameters.

However, the above-mentioned principle of uplink measurement encounters many problems to be solved in the specific application process:

for example how the measurement control device is set. As shown in fig. 2, one RNA may contain multiple cells (or super cells). The Core Network (CN) and the anchor CELL maintain the S1 load, and the UE related context is stored in the anchor CELL (such as CELL 1). When the UE moves inside the RNA, it may move outside the anchor cell, and the camping cell (english may be, but not limited to: camp cell) does not coincide with the anchor cell, in which case how to summarize the measurement results becomes a problem. In addition, although there are only 1 camp CELL, there may be more CELLs (i.e. measurement CELLs, such as CELL 3) that can receive the TS of the UE, and in this case, how to aggregate the measurement results is also a problem. Since the measurement device for measuring the uplink TS is on the network side, it is necessary to perform summary comparison of measurement results on the network side. If each cell receiving the TS of the UE does not know to which device to summarize the measurement results for control, the subsequent positioning and other processes cannot be completed.

In order to manage mobility of a UE in an RRC _ INACTIVE state, an embodiment of the present application provides a state management method based on uplink measurement. In the following embodiments, the UE may be in RRC _ INACTIVE state. Optionally, the RRC _ INACTIVE state has the following characteristics: the network side retains context (context) information of the UE in RRC _ INACTIVE. The base station and the core network retain connection information of the UE at RRC _ INACTIVE. The network side can know the location of the UE in RRC _ INACTIVE state in the RNA layer, i.e. the network layer can know in which RNA the UE is. When the UE in RRC _ INACTIVE moves out of the RNA where the UE was located, the network side can sense the RNA. Alternatively, in the examples of the present application, RNA has the following characteristics: each UE is in a specific RNA, and the network side can configure the RNA in which the UE is; the RNA may cover 1 or more cells.

The embodiment of the application provides a mobility management method of UE. The scheme provided by the embodiment of the application is described below with reference to the attached drawings. In the method, each UE in RRC _ INACTIVE state corresponds to a measurement control point base station on the network side, and the measurement control point base station manages the mobility of the UE.

Specifically, referring to fig. 3, the method includes:

s301, the measurement control point base station sends a measurement request to one or more measurement base stations, and the measurement request is used for indicating to measure the uplink TS of the UE. The measurement base station refers to a base station to which a measurement cell capable of receiving the TS of the UE belongs.

S302, the measurement control point base station determines a potential target cell of the UE according to a measurement result generated by the measurement control point base station and/or a measurement result returned by the measurement base station, wherein the measurement result is generated based on an uplink TS sent by the UE.

Optionally, the measurement control point base station is a base station to which a cell where the UE resides belongs, or a base station to which an anchor cell of the UE belongs. Further, the measurement control point base station may carry measurement control point indication information in the measurement request, where the measurement control point indication information is used to indicate that the measurement control point base station is a base station to which an anchor cell of the UE belongs or a base station to which a cell where the UE resides belongs. The measurement control point indication information is used for indicating the measurement base station to send a measurement result to the base station to which the anchor cell belongs or to the base station to which the resident cell belongs. The measurement base station may know whether to send the measurement result to the anchor base station or to the resident base station according to the measurement control point indication information.

Before describing the above UE mobility management method with reference to a specific scenario, a term of a potential target cell involved in the scheme is first described. In the LTE scenario, for a UE in RRC _ CONNECTED state, the target cell refers to a cell that is a serving cell after handover when a cell handover occurs. And the UE in the RRC _ CONNECTED state measures the downlink reference signals of all the cells, and reports the determined target cell to the network side only when the cell switching condition is met. The potential target cell may be regarded as a target cell for which the UE in the RRC _ CONNECTED state needs to perform measurement on the downlink reference signal. For the UE in the RRC _ IDLE state, the UE monitors a broadcast channel during cell reselection, and obtains related parameters, such as what threshold the signal quality is lower than, which neighbor cells are measured, and which neighbor cells are in the same frequency, different frequency, or different system. And the UE determines a new serving cell from the plurality of adjacent cells through measurement comparison and resides on the new serving cell. All neighbor cells (neighbor cells) of the camping cell of the UE may be considered as potential target cells. In the above cell reselection process, the UE does not perform signaling interaction with the base station, and is implemented by internal processing.

The meaning of a potential target cell in this application is different from that in the LTE scenario. Since the network layer determines the cell where the UE should reside by measuring the uplink TS of the UE, the potential target cell refers to one or more cells that are selected by the base station from all neighboring cells that the UE can know by monitoring the broadcast channel according to optional factors such as the position or the movement direction of the UE. The potential target cell refers to a cell determined by the base station to be likely to be camped on by the UE in the future. From the determination result, the finally determined range of the potential target cell may be smaller than the neighboring cell in the LTE scenario, that is, the potential target cell is a subset of the neighboring cell.

The embodiment of the application provides a UE mobility management method based on uplink TS measurement. In the method, a measurement control point base station on the network side sends a measurement request to one or more measurement base stations to request the measurement base stations to measure the uplink TS of the UE. And the measurement control point base station summarizes the measurement results of the uplink TS of the UE generated by each base station, and determines the potential target cell of the UE according to the measurement results, wherein the potential target cell reflects the cell where the UE possibly resides, so that the management of the mobility of the UE is realized. In the process, the network side does not need to perform frequent signaling interaction with the UE, so that air interface resources are saved. Because the network side can timely acquire the position of the UE, when downlink service arrives or the state changes, the network side can quickly establish connection with the UE, and extra time delay is avoided.

Fig. 4 is a schematic diagram of a network environment to which a state management method according to an embodiment of the present application is applied. The environment includes a wireless network and a UE. The wireless network includes a core network CN, a first radio access notification area RNA1, and a second radio access notification area RNA 2. The first radio access notification region RNA1 includes 3 CELLs, CELL1, CELL2, and CELL 3. CELL1 is the anchor CELL for the UE. The second radio access notification area comprises 3 CELLs, namely CELL4, CELL 5 and CELL 6. The UE may move between the cells, which specifically includes the following scenarios: first, the UE moves between anchor CELL and non-anchor CELL, e.g., from CELL1 to CELL 2; second, the UE moves between two non-anchor CELLs, e.g., from CELL2 to CELL 3; third, the UE moves between CELLs across the RNA, e.g., from CELL3 to CELL 4.

In this application, an anchor cell refers to a cell that retains context information of a UE in an RRC _ INACTIVE state and maintains a connection with a core network.

In the LTE system, the meaning of camp cell may refer to the definition of a serving cell in LTE, for example, camp cell refers to a serving cell (serving cell) where a UE in an RRC _ IDLE state currently resides, or a cell where a UE in an RRC _ CONNECTED state currently resides. In this application, the meaning of the camp cell is extended on the basis, and the camp cell refers to a cell whose coverage includes the UE in the RRC _ INACTIVE state, and the UE in the RRC _ INACTIVE state synchronizes and monitors the broadcast channel and the paging channel of the camp cell.

When the UE moves to a cell covered by any one of the first radio access notification region RNA1 and the second radio access notification region RNA2, the cell is regarded as a camping cell. For the sake of simplicity and convenience of the following description, the base station to which the camping cell of the UE belongs is referred to as a camping base station. The base station to which the anchor cell belongs is called an anchor base station. In a broad sense, the base stations to which the cells capable of receiving the UE TS belong are all measurement base stations, and in order to distinguish from the anchor base station and the camping base station in this application, the base stations to which the other cells capable of receiving the UE TS belong, except the anchor base station and the camping base station, are called measurement base stations. In the above three scenarios, different interaction mechanisms exist between the UE and the base station, and between the base station and the base station, respectively, and the following description is provided by a specific embodiment.

The embodiment of the application mainly provides two schemes according to different measurement control devices, namely a scheme that a measurement control point base station is a resident base station and a scheme that the measurement control point base station is an anchor base station.

In the first scheme, the measurement control point base station is a camping base station. Firstly, a resident base station (the resident base station may be an anchor base station or not) of the UE sends a measurement request to one or more measurement base stations, where the measurement request is used to instruct to measure an uplink TS of the UE, and measurement control point instruction information carried in the measurement request is used to instruct the measurement control point base station to be a base station to which a resident cell of the UE belongs. And the resident base station of the UE determines the potential target cell of the UE according to the measurement result generated by the resident base station and/or the measurement result returned by one or more measurement base stations. And the resident base station of the UE sends a measurement request to the base station to which the potential target cell belongs, and determines a subsequent flow to be executed after receiving the feedback corresponding to the base station to which the potential target cell belongs.

The subsequent procedure to be executed includes, but is not limited to, if the potential target cell and the camped cell of the UE are in the same RNA, after the camped base station of the UE determines that the UE needs to change the camped cell according to the measurement result returned by the base station to which the potential target cell belongs, the camped base station sends a camped cell change instruction to the base station to which the potential target cell belongs and other measurement base stations, and sends a message to the UE so that the network side and the UE synchronize the changed camped cell. When the camping base station is not the anchor base station, the camping base station also needs to send a camping cell change instruction to the anchor base station. Thereby completing the change of the resident cell and the potential target cell becomes a new resident cell. After the resident cell of the user equipment is changed, the measurement base station capable of receiving the TS of the UE reports the measurement result to the base station to which the new resident cell belongs.

If the potential target cell and the resident cell of the UE are in different RNAs, the resident base station of the UE sends a message to the UE according to a measurement result or a conflict indication returned by the base station to which the potential target cell belongs, wherein the conflict indication is used for indicating that an uplink TS of the UE is unavailable in the potential target cell, the message sent to the UE is used for informing the UE to start measurement on a downlink signal of the resident cell of the UE, and a radio resource control reconfiguration process is initiated according to the measurement result of the downlink signal. When the resident base station is not the anchor base station, the resident base station also needs to send a measurement change instruction to the anchor base station, and the measurement change instruction is used for informing the anchor base station of the UE that the measurement mode of the UE is changed to measure the downlink signal.

In the second scheme, the measurement control point base station is an anchor base station. Firstly, an anchor base station (the anchor base station may be a resident base station or not) of the UE sends a measurement request to one or more measurement base stations, where the measurement request is used to instruct to measure an uplink TS of the UE, and measurement control point indication information carried in the measurement request is used to instruct the measurement control point base station to be a base station to which an anchor cell of the UE belongs. And the anchor base station of the UE determines a potential target cell according to the measurement result generated by the anchor base station and/or the measurement result returned by one or more measurement base stations, and sends a measurement request to the base station to which the potential target cell belongs. And after receiving the feedback corresponding to the base station to which the potential target cell belongs, the anchor base station determines the subsequent flow to be executed.

The following procedure to be executed includes, but is not limited to, if the potential target cell and the camped cell of the UE are in the same RNA, after determining that the camped cell needs to be changed by the user equipment according to the measurement result returned by the base station to which the potential target cell belongs, the anchor base station of the UE sends a message to the UE so that the network side and the UE can synchronize the camped cell after the change, without sending a camped cell change instruction to other measurement base stations. If the anchor base station is not the resident base station of the UE, the message sent to the UE by the anchor base station is sent to the user by the original resident base station after the anchor base station sends the resident cell change instruction to the original resident base station. Thereby completing the change of the resident cell. After the resident cell of the user equipment is changed, the measurement base station which can receive the TS of the UE still reports the measurement result to the anchor point base station.

If the potential target cell and the resident cell of the UE are in different RNAs, the anchor base station of the UE sends a message to the UE according to a measurement result or a conflict indication returned by the base station to which the potential target cell belongs, wherein the conflict indication is used for indicating that an uplink TS of the UE is unavailable in the potential target cell, the message sent to the UE is used for informing the UE to start measurement on a downlink signal of the resident cell of the UE, and a radio resource control reconfiguration process is initiated according to the measurement result of the downlink signal. When the anchor base station is not the resident base station, the message sent to the UE is sent to the UE by the anchor base station through the resident base station.

Optionally, in the above scheme, the message sent by the measurement control point base station to the UE is a paging message.

Fig. 5 is a flowchart illustrating a state management method according to an embodiment of the present application. The first solution, that is, the solution in which the measurement control point base station is a camping base station, is described in this embodiment with reference to a flowchart. The method includes, but is not limited to, the following steps.

S501, the resident base station sends a first measurement request to one or more measurement base stations. The first measurement request is used to instruct measurement on an uplink TS of the UE, and optionally, the first measurement request carries measurement control point instruction information, where the measurement control point instruction information is used to instruct the measurement control point base station to be a base station to which a cell where the UE resides belongs.

Optionally, one or more measurement base stations may be informed by two control indicators whether the measurement control point base station is a base station to which a camped cell of the UE belongs or a base station to which an anchor cell belongs. Wherein the first control indicator is used for indicating that the measurement control point base station is the base station to which the resident cell belongs. The second control indicator is used for indicating that the measurement control point base station is the base station to which the anchor cell belongs. Optionally, one or more measurement base stations may be informed of whether the measurement control point base station is a base station to which a camped cell of the UE belongs or a base station to which an anchor cell belongs through different states of one control indicator. The first state of the control indicator may be represented by 1 and the second state of the control indicator may be represented by 0. In the embodiment shown in fig. 5, the base station to which the camping cell belongs is taken as the measurement control device, so the first indicator is carried in the measurement request.

Optionally, in order to make the measurement results of the respective measurement base stations be measurement results obtained based on the same measurement parameters, and facilitate subsequent comparison and analysis, the first measurement request further carries parameters required for measuring an uplink TS of the UE, so that one or more measurement base stations use the parameters to measure the UE. Such as at least one of a measurement duration, a signal quality threshold, and measurement control information. The measurement control information includes at least one of a terminal identifier, a measurement period, a measurement reporting condition, and a tracking signal of the ue.

S502, the resident base station determines a potential target cell of the UE according to one or more measurement results.

The resident base station may estimate the motion direction of the UE according to the measurement result obtained by measuring the uplink TS of the UE generated by the resident base station and/or the measurement result returned by one or more measurement base stations according to the measurement request in S501, optionally in combination with information such as the historical motion trajectory of the UE, so as to determine the potential target cell of the UE. The potential target cell is a cell that may become a camping cell for the UE.

The potential target cell and the resident cell may be in the same RNA or in different RNAs.

In the state management method provided in the embodiment shown in S501-S502 in fig. 5, the camping base station of the UE is used as a measurement control point base station, and after the measurement results obtained by measuring the TS of the UE from the measurement base stations are summarized, the potential target cell of the UE is determined. Thereby realizing management of UE mobility. In the process, the network side does not need to perform frequent signaling interaction with the UE, so that air interface resources are saved. Because the network side can timely acquire the position of the UE, when downlink service arrives or the state changes, the network side can quickly establish connection with the UE, and extra time delay is avoided.

Optionally, after S502, the camped base station as the measurement control point base station may also change the camped cell of the UE through interaction with the base station to which the potential target cell belongs and interaction with the UE.

S503, after the camping base station determines the potential target cell, the camping base station may send a second measurement request to the base station to which the potential target cell belongs. The second measurement request is used for indicating the uplink TS of the user equipment UE to be measured. Similarly to the first measurement request, optionally, the second measurement request may further carry measurement control point indication information, where the measurement control point indication information is used to indicate that the measurement control point base station is a base station to which the camped cell of the UE belongs, and the specific method is not described again.

Optionally, the camped base station performs different subsequent procedures according to the determination result of whether the potential target cell and the camped cell are in the same RNA. If the potential target cell is in the same RNA as the resident cell, S504-S509 is performed, and if the potential target cell is in a different RNA from the resident cell, S511-S516 are performed.

S504, the base station to which the potential target cell belongs sends the measurement result to the resident base station. And the measurement result sent by the base station to which the potential target cell belongs is generated based on the uplink TS sent by the UE and received in the potential target cell after the base station to which the potential target cell belongs receives the second measurement request. Optionally, if the second measurement request further carries parameters required for measurement, the base station to which the potential target cell belongs measures the uplink TS sent by the UE and received in the potential target cell according to the parameters carried in the second measurement request, and sends the measurement result to the camped base station.

And S505, the resident base station sends a first message to the UE according to the measurement result sent by the base station to which the potential target cell belongs, wherein the first message is used for indicating the UE to synchronize or monitor a broadcast channel and a paging channel of the potential target cell.

Optionally, the first message instructs the UE to synchronize the broadcast channel and the paging channel of the potential target cell, or instructs the UE to monitor the broadcast channel and the paging channel of the potential target cell, or may also instruct the UE to synchronize and monitor the broadcast channel and the paging channel of the potential target cell.

Alternatively, the first message may be a paging message. In this embodiment, the first message sent in the paging message mode is referred to as a first paging message. The embodiment of the application provides two modes for sending the first paging message under different scenes. The information carried by the paging message is different in each mode. The method can be used alternatively according to actual situations in an actual network environment.

First, the method is applicable to paging messages in a UE slow-moving scene.

The resident base station sends a first paging message to the user equipment when determining that the user equipment needs to change the resident cell according to the received measurement result sent by the base station to which the potential target cell belongs, the self-generated measurement result and optionally the measurement result sent by other cells if other measurement cells exist. Please refer to step S506 for a description of determining that the ue needs to change the camping cell.

The first paging message is used for indicating the user equipment to change from a broadcast channel and a paging channel for synchronizing or monitoring the resident cell to a broadcast channel and a paging channel for synchronizing or monitoring the potential target cell. The first paging message carries a change status indicator and an identifier of the potential target cell, wherein the change status indicator is used for indicating the UE to change the cell which is a synchronization and monitoring object of a broadcast channel and a paging channel.

In a scenario that the UE moves at a slow speed, the signal quality of the original camping cell is not deteriorated too much in a short time period from the time the camping base station determines that the UE needs to change the camping cell to the time the UE receives the paging message, because the moving distance of the UE is short. Therefore, the UE can basically ensure that the paging message is received so as to complete the change of the resident cell. In addition, the change of the resident cell can be completed only by sending a paging message to the UE by the network side, and air interface resources can be saved.

And secondly, the method is suitable for the paging message in the UE fast moving scene.

The method comprises the steps that a resident base station firstly sends a first paging message to user equipment before determining that the UE needs to change a resident cell according to a received measurement result sent by a base station to which a potential target cell belongs, a self-generated measurement result and optionally measurement results sent by other cells if the other measured cells exist, wherein the first paging message is used for indicating the user equipment to synchronize or monitor a broadcast channel and a paging channel of the potential target cell on the basis of continuously synchronizing or monitoring the broadcast channel and the paging channel of the resident cell. Optionally, before the camped base station determines that the UE needs to change the camped cell, it determines whether a predetermined cell increase condition is satisfied according to the measurement result. When the predetermined cell increase condition is determined to be satisfied, a first paging message is first transmitted to the user equipment. It will be appreciated that the predetermined cell add condition may require less signal quality in the potential target cell than the predetermined camped cell change condition.

And after the user equipment changes the resident cell, sending a second message to the user equipment by the base station to which the potential target cell belongs. Optionally, the second message may also be a paging message. In order to distinguish from the first paging message, a second message transmitted in the form of a paging message is referred to as a second paging message, and the second paging message is used to indicate that the ue is no longer synchronized or listening to the broadcast channel and the paging channel of the camping cell before the change. Optionally, the second paging message is sent to the user when the base station to which the potential target cell belongs determines, according to the received measurement result, that the signal quality of the camped cell before the change meets the cell release condition. The first paging message carries an added state indicator and an identifier of the potential target cell, wherein the added state indicator is used for indicating the UE to add a cell which is a synchronization or monitoring object of a broadcast channel and a paging channel; the second paging message carries a deletion status indicator and the identity of the resident cell before the change, wherein the deletion status indicator is used for indicating the UE to delete the cell which is a synchronization or monitoring object of the broadcast channel and the paging channel.

In a scenario where the UE moves at a fast speed, in a time period from when the camped base station determines that the UE needs to change the camped cell to when the UE receives the paging message, since the UE may have moved a relatively long distance, the signal quality of the original camped cell may have rapidly deteriorated, and it may not be guaranteed that the UE may receive the paging message. In order to improve the reliability of the UE receiving the paging message, the UE may be allowed to simultaneously monitor the broadcast channel and the paging channel of the camping cell, and the broadcast channel and the paging channel of the potential target cell in advance. The measurement control device may notify the UE to not synchronize and monitor the broadcast channel and the paging channel of the original camping cell when it is determined that the user equipment needs to change the camping cell according to the change of the subsequent signal quality.

S506, the resident base station determines whether the UE needs to change the resident cell according to the measurement result sent by the base station to which the potential target cell belongs. And if the user equipment does not need to change the resident cell, returning to the step S502 to continuously receive the measurement result sent by each measurement base station.

S507, the camped base station sends a first camped cell change instruction to the base station of the potential target cell, where the first camped cell change instruction is used to notify the camped cell of the user equipment after the potential target cell is used as the changed camped cell.

In order to distinguish the camped cell change instruction sent by the first base station to the different base stations, in the embodiment of the present application, the camped cell change instruction sent by the camped base station to the base station to which the potential target cell belongs is referred to as a "first camped cell change instruction". The first resident cell change instruction carries at least three types of information required to be carried. The first type of information is an identifier of a potential target cell, and is used for notifying a camped cell of the user equipment after the potential target cell is used as a changed camped cell. The second type of information is paging information, so that the new camping cell sends paging messages to the UE according to the information. The third type of information is information required for the new camping cell to perform resource control.

Illustratively, the identity of the potential target CELL is a physical CELL identity pCELL ID, and may also be an ECI consisting of a base station identity and a CELL ID.

Illustratively, the information required for resource control by the new camped cell includes at least one of a cell list of the radio access notification cell and measurement information, where the measurement information includes at least one of a measurement cell identifier, a measurement duration, a measurement threshold value, and an information reporting condition.

Optionally, if there are one or more cells covered by the measuring base station in the RNA of the camped cell, after determining whether the user equipment needs to change the camped cell S506, the method further includes:

and S508, the resident base station sends a second resident cell change instruction to other measuring base stations, wherein the second resident cell change instruction is used for informing other measuring base stations of the resident cell of the user equipment after the potential target cell is taken as the changed resident cell. For convenience of distinction, in the embodiment of the present application, the camping cell change instruction sent by the camping base station to the other measuring base station is referred to as a "second camping cell change instruction". The second camped cell change indication carries an identification of the potential target cell. Therefore, after receiving the second resident cell change instruction, the other measurement base stations send measurement results to the new resident base station according to the potential target cell identification carried in the second resident cell change instruction.

And the resident base station sends a resident cell change instruction and a paging message to complete the resident cell change. And after the user equipment changes the resident cell, the base station to which the potential target cell belongs becomes a new resident base station. The measurement control device changes the camped base station in steps 501 to 509 to a base station to which the potential target cell belongs (i.e. a new camped base station), and the other measurement base stations send measurement results for measuring the uplink TS of the UE to the base station to which the potential target cell belongs.

In the embodiment of the present application, the camped base station requests the base station to which the potential target cell belongs for the measurement result of the TS of the UE measured by the potential target cell, so as to determine whether the UE needs to change the camped cell. And if confirming that the resident cell needs to be changed, the resident base station sends a paging message carrying the potential target cell to the UE, and sends a resident cell change instruction to the base station to which the potential target cell belongs, so that the resident cell is changed. Compared with other schemes such as a scheme based on downlink measurement, the method does not need all cells in the RNA to send paging messages, and reduces signaling overhead.

Optionally, if the camped base station is not the anchor base station, after determining whether the user equipment needs to change the camped cell at S506, the method further includes:

s509, the camped base station sends a third camped cell change instruction to the base station to which the anchor cell of the UE belongs, where the third camped cell change instruction is used to notify the camped cell of the UE after the potential target cell is used as the changed camped cell. And the third resident cell change instruction carries the identification of the potential target cell. Therefore, the anchor point base station of the UE can timely acquire the changed resident cell after the resident cell of the user equipment is changed, so that the network side can timely acquire the position of the user equipment, and can timely transmit data with the UE when service requirements exist, such as when downlink service arrives or the state of the user equipment needs to change, thereby shortening service delay.

And S511, the base station to which the potential target cell belongs carries out resource conflict judgment. If the resource conflicts, namely the resource used by the uplink TS sent by the UE is occupied by other UEs, the base station to which the potential target cell belongs sends a conflict indication to the residing base station, wherein the conflict indication is used for indicating that the uplink tracking signal sent by the UE is unavailable in the RNA where the potential target cell is located. And the conflict indication carries the identity of the UE. And after receiving the collision indication, the camping base station executes S512-S513.

And if the resources do not conflict, the base station to which the potential target cell belongs sends the measurement result to the resident base station. And after receiving the measurement result, the camping base station executes S514-S516.

S512, the resident base station sends a third message to the UE. Optionally, the third message is a paging message. In order to distinguish from the first paging message and the second paging message in the foregoing S505, a third message sent to the UE in the form of a paging message after the camping base station receives the collision indication is referred to as a third paging message.

And the third paging message is used for informing the UE to start measuring the downlink signal of the resident cell of the UE and initiating a radio resource control reconfiguration process according to the measurement result of the downlink signal. Optionally, the third paging message carries a downlink measurement indicator.

Optionally, since the potential target cell is a cell where the UE may camp, which is determined by the camped base station, this indicates that the measurement result obtained by measuring the TS of the UE by the potential target cell in each measurement cell is better. The quality of the uplink TS and the quality of the downlink reference signal have a certain reference, so that the downlink reference signal of the potential target cell may have a better quality in all neighboring cells of the UE. Therefore, the camping base station may notify the UE of the identifier of the potential target cell, so that the UE measures the downlink reference signal of the potential target cell as a reference basis for initiating the radio resource reconfiguration procedure. In this case, the camped base station may further instruct, through a third paging message, the UE to start measurement on downlink signals of the camped cell and the potential target cell of the UE, and initiate a radio resource control reconfiguration procedure according to measurement results of the downlink signals of the camped cell and the potential target cell. Optionally, the third paging message further carries an increase status indicator and an identifier of the potential target cell, where the increase status indicator is used to indicate that the UE increases a cell serving as a measurement object of a downlink reference signal.

Optionally, if the camped base station is not the anchor base station, after receiving the collision indication, the camped base station further includes:

s513, the camping base station sends a measurement change instruction to the anchor base station of the UE. Wherein the measurement change instruction is used for notifying a base station to which an anchor cell of the UE belongs that the measurement mode of the UE is changed to measurement of the downlink signal. And the measurement change indication carries the identity of the UE.

And S514, the resident base station determines whether the measurement change condition is met according to the measurement result sent by the base station to which the potential target cell belongs. If the measurement change condition is satisfied, the camping base station performs S515, and if the measurement change condition is not satisfied, the camping base station continues to receive the measurement results from each of the measuring base stations until it is confirmed that the measurement change condition is satisfied according to the obtained measurement results, and then performs S515.

S515, the camped base station sends a third paging message to the UE. For the explanation of the third paging message, refer to the description in S512 above.

Optionally, if the camped base station is not the anchor base station, after determining that the measurement change condition is satisfied, the camped base station further includes:

s516, the resident base station sends a measurement change instruction to the anchor base station of the UE. For the description of the measurement change instruction, refer to the description in S513 above.

Fig. 6 is a flowchart illustrating a state management method according to another embodiment of the present application. This embodiment describes the second scheme, that is, the scheme in which the measurement control point base station is the anchor base station, with reference to a flowchart. The method includes, but is not limited to, the following steps.

S601, the anchor base station sends a first measurement request to one or more measurement base stations. The first measurement request is used for indicating the measurement of the uplink TS of the UE. Optionally, the first measurement request carries measurement control point indication information, where the measurement control point indication information is used to indicate that the measurement control point base station is a base station to which an anchor cell belongs.

Optionally, the measurement control point base station may inform one or more measurement base stations of whether the measurement control point base station is a base station to which a camping cell of the UE belongs or a base station to which an anchor cell belongs through two control indicators. Wherein the first control indicator is used for indicating that the measurement control point base station is the base station to which the resident cell belongs. The second control indicator is used for indicating that the measurement control point base station is the base station to which the anchor cell belongs. Optionally, one or more measurement base stations may be informed of whether the measurement control point base station is a base station to which a camped cell of the UE belongs or a base station to which an anchor cell belongs through different states of one control indicator. The first state of the control indicator may be represented by 1 and the second state of the control indicator may be represented by 0. In the embodiment shown in fig. 6, the base station to which the anchor cell belongs is used as the measurement control device, and therefore the measurement request carries the second indicator.

S602, the anchor base station determines a potential target cell of the UE according to one or more measurement results.

The anchor base station may estimate the motion direction of the UE according to a measurement result obtained by measuring the uplink TS of the UE generated by the anchor base station and/or a measurement result returned by one or more measurement base stations according to the measurement request in S601, optionally in combination with information such as the historical motion trajectory of the UE, so as to determine the potential target cell of the UE. The potential target cell is a cell that may become a camping cell for the UE.

In the status management method provided in the embodiment shown in S601-S602 in fig. 6, the anchor base station of the UE is used as a measurement control point base station, and after the measurement results obtained by measuring the TS of the UE from the measurement base stations are summarized, the potential target cell of the UE is determined. Thereby realizing management of UE mobility. In the process, the network side does not need to perform frequent signaling interaction with the UE, so that air interface resources are saved. Because the network side can timely acquire the position of the UE, when downlink service arrives or the state changes, the network side can quickly establish connection with the UE, and extra time delay is avoided.

Optionally, after S602, the anchor base station serving as the measurement control point base station may also change the camping cell of the UE through interaction with the base station to which the potential target cell belongs and interaction with the UE.

S603, after the anchor base station determines the potential target cell, the anchor base station may send a second measurement request to the base station to which the potential target cell belongs. The second measurement request is used for indicating the uplink TS of the user equipment UE to be measured. Similarly to the first measurement request, optionally, the second measurement request may further carry measurement control point indication information, where the measurement control point indication information is used to indicate that the measurement control point base station is a base station to which the anchor cell of the UE belongs, and the specific method is not described again.

Optionally, the anchor base station performs different subsequent procedures according to the determination result of whether the potential target cell and the resident cell are in the same RNA. If the potential target cell is in the same RNA as the resident cell, S604-S608 are performed, and if the potential target cell is in a different RNA from the resident cell, S611-S614 are performed.

S604, the base station to which the potential target cell belongs sends the measurement result to the anchor base station. And the measurement result sent by the base station to which the potential target cell belongs is generated based on the uplink TS sent by the UE and received in the potential target cell after the base station to which the potential target cell belongs receives the second measurement request. Optionally, if the second measurement request further carries parameters required for measurement, the base station to which the potential target cell belongs measures the uplink TS sent by the UE and received in the potential target cell according to the parameters carried in the second measurement request, and sends the measurement result to the anchor base station.

S605, the anchor base station sends a first message to the UE according to the measurement result sent by the base station to which the potential target cell belongs, wherein the first message is used for indicating the UE to synchronize or monitor the broadcast channel and the paging channel of the potential target cell.

First, the method is applicable to paging messages in a UE slow-moving scene.

And the anchor base station sends a first paging message to the user equipment when determining that the user equipment needs to change the resident cell according to the received measurement result sent by the base station to which the potential target cell belongs, the measurement result generated by the anchor base station and optionally the measurement result sent by other cells if other measurement cells exist. Please refer to step S606 for a description of determining that the ue needs to change the camping cell.

In a scenario that the UE moves at a slow speed, the signal quality of the original camping cell is not deteriorated too much in a short time period from the anchor base station determining that the UE needs to change the camping cell to the time when the UE receives the paging message because the moving distance of the UE is short. Therefore, the UE can basically ensure that the paging message is received so as to complete the change of the resident cell. In addition, the change of the resident cell can be completed only by sending a paging message to the UE by the network side, and air interface resources can be saved.

The method comprises the steps that an anchor base station sends a first paging message to user equipment before determining that UE needs to change a resident cell according to a received measurement result sent by a base station to which a potential target cell belongs, a measurement result of the resident cell and optionally measurement results sent by other cells if the other measurement cells exist, wherein the first paging message is used for indicating the user equipment to synchronize or monitor a broadcast channel and a paging channel of the potential target cell on the basis of continuously synchronizing or monitoring the broadcast channel and the paging channel of the resident cell. Optionally, before the anchor base station determines that the UE needs to change the camping cell, it determines whether a predetermined cell increase condition is satisfied according to the measurement result. When the predetermined cell increase condition is determined to be satisfied, a first paging message is first transmitted to the user equipment. It will be appreciated that the predetermined cell add condition may require less signal quality in the potential target cell than the predetermined camped cell change condition.

And after the user equipment changes the resident cell, the anchor base station sends a second message to the user equipment through the base station to which the potential target cell belongs. Optionally, the second message may also be a paging message. In order to distinguish from the first paging message, a second message transmitted in the form of a paging message is referred to as a second paging message, and the second paging message is used to indicate that the ue is no longer synchronized or listening to the broadcast channel and the paging channel of the camping cell before the change. Optionally, the second paging message is sent to the user through the base station to which the potential target cell belongs when the anchor base station determines, according to the received measurement result, that the signal quality of the resident cell before the change meets the cell release condition. The first paging message carries an added state indicator and an identifier of the potential target cell, wherein the added state indicator is used for indicating the UE to add a cell which is a synchronization or monitoring object of a broadcast channel and a paging channel; the second paging message carries a deletion status indicator and the identity of the resident cell before the change, wherein the deletion status indicator is used for indicating the UE to delete the cell which is a synchronization or monitoring object of the broadcast channel and the paging channel.

In a scenario where the UE moves at a fast speed, in a time period from the anchor base station determining that the UE needs to change the camping cell to the time period when the UE receives the paging message, since the UE may have moved a considerable distance, the signal quality of the original camping cell may have rapidly deteriorated, and thus it cannot be guaranteed that the UE can receive the paging message. In order to improve the reliability of the UE receiving the paging message, the UE may be allowed to simultaneously monitor the broadcast channel and the paging channel of the camping cell, and the broadcast channel and the paging channel of the potential target cell in advance. The measurement control device may notify the UE to not synchronize and monitor the broadcast channel and the paging channel of the original camping cell when it is determined that the user equipment needs to change the camping cell according to the change of the subsequent signal quality.

It should be noted here that if the anchor base station is the base station to which the camping cell of the UE belongs, the first paging message is sent to the UE by the anchor base station, and if the anchor base station is not the base station to which the camping cell of the UE belongs, the first paging message is sent to the UE by the anchor base station through the camping base station of the UE, as shown in S605' in fig. 6.

S606, the anchor base station determines whether the UE needs to change the resident cell according to the measurement result sent by the base station to which the potential target cell belongs. If the ue needs to change the camping cell, S607 is executed, and if the ue does not need to change the camping cell, S602 is returned to continue receiving the measurement results sent by each measuring base station.

S607, the anchor base station sends a first resident cell change instruction to the base station of the potential target cell, where the first resident cell change instruction is used to notify the resident cell of the ue after the potential target cell is used as a changed resident cell.

In order to facilitate distinguishing the resident cell change instruction sent by the first base station to different base stations, in the embodiment of the present application, the resident cell change instruction sent by the anchor base station to the base station to which the potential target cell belongs is referred to as a "first resident cell change instruction". The first camped cell change indication carries an identification of the potential target cell.

s608, the anchor base station sends a second resident cell change instruction to the base station to which the original resident cell of the UE belongs, where the second resident cell change instruction is used to notify the resident cell of the UE after the potential target cell is used as a changed resident cell. And the second resident cell change instruction carries the identification of the potential target cell.

In order to ensure the network side and the UE synchronized changed camping cell, the anchor base station also needs to notify the UE to change the camping cell to a potential target cell. Since the UE can only receive the paging message sent by the camped cell, the anchor base station needs to notify the camped base station to send a first message to the UE to notify the UE to change the camped cell. Optionally, the anchor base station may notify the camped base station to send the first message to the user through a single message, or may notify the camped base station to send the first message to the user through a second camped cell change instruction, that is, the second camped cell change instruction is further used to notify the UE to send the first message, where the first message is used to instruct the UE to change from synchronizing or monitoring a broadcast channel and a paging channel of the camped cell to synchronizing or monitoring a broadcast channel and a paging channel of the potential target cell. Compared with the mode of sending messages separately, the latter mode can save the signaling between the anchor base station and the resident base station.

S611, the base station to which the potential target cell belongs carries out resource conflict judgment. If the resource conflicts, namely the resource used by the uplink TS sent by the UE is occupied by other UEs, the base station to which the potential target cell belongs sends a conflict indication to the anchor base station, wherein the conflict indication is used for indicating that the uplink tracking signal sent by the UE is unavailable in the RNA where the potential target cell is located. And the conflict indication carries the identity of the UE. After receiving the collision indication, the anchor base station performs S612.

And if the resources do not conflict, the base station to which the potential target cell belongs sends the measurement result to the anchor base station. After receiving the measurement result, the anchor base station performs S613-S614.

S612, the anchor base station sends a third message to the UE. Optionally, the third message is a paging message. In order to distinguish from the first paging message and the second paging message in the foregoing S605, a third message sent to the UE in the paging message manner after the camping base station receives the collision indication is referred to as a third paging message.

Optionally, since the potential target cell is a cell where the UE may camp, which is determined by the anchor base station, this indicates that the measurement result obtained by measuring the TS of the UE by the potential target cell in each measurement cell is better. The quality of the uplink TS and the quality of the downlink reference signal have a certain reference, so that the downlink reference signal of the potential target cell may have a better quality in all neighboring cells of the UE. Therefore, the anchor base station may notify the UE of the identifier of the potential target cell, so that the UE measures the downlink reference signal of the potential target cell as a reference basis for initiating the radio resource reconfiguration procedure. In this case, the anchor base station may further instruct, through a third paging message, the UE to start measurement on downlink signals of the camped cell and the potential target cell of the UE, and initiate a radio resource control reconfiguration procedure according to measurement results of the downlink signals of the camped cell and the potential target cell. Optionally, the third paging message further carries an increase status indicator and an identifier of the potential target cell, where the increase status indicator is used to indicate that the UE increases a cell serving as a measurement object of a downlink reference signal.

S613, the anchor base station determines whether the measurement change condition is met according to the measurement result sent by the base station to which the potential target cell belongs. If the measurement change condition is satisfied, the anchor base station performs S614, and if the measurement change condition is not satisfied, the anchor base station continues to receive the measurement results from each measurement base station until it is confirmed that the measurement change condition is satisfied according to the obtained measurement results, and then performs S614.

S614, the anchor base station sends a third paging message to the UE. For the explanation of the third paging message, refer to the description in S612 above.

It should be noted that, if the anchor base station is the base station to which the resident cell of the UE belongs, the third paging message is sent to the UE by the anchor base station, and if the anchor base station is not the base station to which the resident cell of the UE belongs, the third paging message is sent to the UE by the anchor base station through the resident base station of the UE, as shown in S612 'and S614' in fig. 6.

Fig. 7 is a flowchart illustrating a state management method according to another embodiment of the present application. In this embodiment, a first moving scenario shown in fig. 4, that is, a scenario in which the UE moves from an anchor CELL (CELL 1) to a non-anchor CELL (CELL 2), and an interaction process between each base station and between the base station and the UE will be described in detail. In this embodiment, the measurement control point base station is a camping base station. Since the anchor CELL (CELL 1) is also the camping CELL at the same time when the UE starts moving, the camping base station and the anchor base station are both the base station to which CELL1 belongs. The potential target CELL is CELL 2. CELL1 and CELL2 are in the same RNA, RNA 1. In this embodiment, the UE refers to the same UE.

The method includes, but is not limited to, the steps of:

s701, the resident base station sends a first measurement request to the measurement base station. Referring to fig. 4, in this embodiment, in the process of moving the UE from CELL1 to CELL2, CELL3 in RNA1 can also receive the TS signal of the UE, so that the base station to which CELL3 belongs is a measurement base station, and can generate a measurement result of an uplink TS of the UE.

The first measurement request is used for indicating measurement of an uplink TS of the UE, and the measurement request carries measurement control point indication information. Optionally, the measurement control point indication information is used to indicate that the measurement control point base station is a camping base station. For the related description of the measurement control point indication information, please refer to the description in the previous embodiment, which is not described herein again.

Optionally, the first measurement request carries an identifier of the UE, so as to indicate that the uplink TS of the UE is measured.

Optionally, the measurement request further carries various measurement parameters, such as at least one of a measurement duration, a signal quality threshold, and measurement control information, where the measurement control information includes at least one of a terminal identifier of the ue, a measurement period, a measurement reporting condition, and a tracking signal.

Alternatively, the measurement request may be sent over an interface between the base stations, e.g. an Xn interface.

S702, the measurement base station measures the uplink TS of the UE according to the first measurement request, and sends the measurement result to the resident base station. Optionally, after receiving the first measurement request, the base station to which CELL3 belongs continuously measures the uplink TS of the UE according to the measurement period in the measurement control information, and periodically sends the measurement result to the camped base station. And after the base station to which the CELL3 belongs cannot receive the uplink TS of the UE for a certain period of time, the measurement result is not sent to the resident base station.

Alternatively, the measurement result may be sent over an interface between the base station to which CELL3 belongs and the camped base station, e.g. an Xn interface.

And S703, the resident base station determines the potential target CELL of the UE to be CELL2 according to the currently acquired measurement result. The measurement result includes a received measurement result from the measurement base station and a measurement result generated after the resident base station measures the uplink TS of the UE.

The camped base station may select one or more cells with better measurement results for the UE's uplink TS as potential target cells.

Optionally, the camping base station may also refer to other factors on the basis of the obtained measurement results when determining the potential target cell. For example, the camping base station estimates the motion direction of the UE with reference to the historical motion trajectory of the UE, and thus selects the CELL2 with a better measurement result in the motion direction of the UE as a new predicted camping CELL that is likely to become the UE in the future, that is, the potential target CELL is CELL 2.

S704, the resident base station sends a second measurement request to the base station of CELL 2. Optionally, after the camping base station determines that the potential target CELL is CELL2, the base station to which CELL2 belongs is obtained according to the stored correspondence between each CELL in RNA1 and the base station to which each CELL belongs. The resident base station generates a measurement request to be sent to the base station to which the CELL2 belongs, wherein the measurement request carries measurement control point indication information, and the measurement control point indication information is used for indicating that the measurement control point base station is the resident base station. For the related description of the measurement control point indication information, please refer to the description in the previous embodiment, which is not described herein again. Similarly to the first measurement request, the second measurement request further carries various measurement parameters, such as at least one of a measurement duration, a signal quality threshold, and measurement control information, where the measurement control information includes at least one of a terminal identifier, a measurement period, a measurement reporting condition, and a tracking signal of the ue.

Alternatively, the second measurement request may be sent over an interface between the camped base station and the base station to which CELL2 belongs, e.g. an Xn interface.

S705, the base station of CELL2 sends the measuring result to the resident base station. And the measurement result carries information generated after the base station to which the CELL2 belongs measures the uplink TS of the UE according to the parameters carried in the second measurement request. The process of measuring the uplink TS of the UE by the base station to which the CELL2 belongs is similar to that of other measurement base stations, and reference may be made to the description in S702, which is not described herein again.

Alternatively, the measurement result may be sent over an interface between the base station to which CELL2 belongs and the camped base station, e.g. an Xn interface.

S706, the resident base station sends a first paging message to the UE according to the measurement result sent by the base station to which the CELL2 belongs.

Specifically, when the camping base station confirms that the signal quality of the CELL2 is better according to the measurement report sent by the base station to which the CELL2 belongs, the camping base station sends a first paging message to the user, and the purpose of the first paging message is to instruct the user equipment to synchronize and monitor the broadcast channel and the paging channel of the target CELL.

Alternatively, the camped base station may estimate the moving speed of the UE according to the historical moving track of the UE, and if the UE moves slowly, the first way of sending the paging message described in the above embodiment is adopted. And the resident base station determines whether the preset resident cell change condition is met or not according to the obtained measurement result, including the measurement result generated by the resident base station. That is, step 707 is directly executed, and when a preset change condition of the camping cell is satisfied, a first paging message is sent to the UE, where the paging message is used to instruct the UE to change from synchronizing or monitoring the broadcast channel and the paging channel of the camping cell to synchronizing and monitoring the broadcast channel and the paging channel of the potential target cell. Optionally, the first paging message carries a change status indicator and an identifier of the potential target cell, where the change status indicator is used to indicate the UE to change the cell that is a synchronization and monitoring object of the broadcast channel and the paging channel. For example, 2 fields may be extended based on the conventional paging message, where the first field is used to carry the status indicator and the second field is used to carry the identity of the potential target cell. In this embodiment, the first field may occupy 2 bits, and the change status indicator may be represented by data "00".

If it is determined that the UE moves fast according to the estimated moving speed of the UE, the second method of sending the paging message described in the above embodiment is adopted. The camped base station determines whether a predetermined cell addition condition is satisfied according to the measurement result before performing step 707. And when the condition that the preset cell increasing condition is met is determined, the resident base station sends a first paging message to the UE, wherein the paging message is used for indicating the user equipment to synchronize and monitor the broadcast channel and the paging channel of the potential target cell on the basis of continuing synchronizing or monitoring the broadcast channel and the paging channel of the resident cell. Optionally, the first paging message carries an addition status indicator and an identifier of a potential target cell, where the addition status indicator is used to instruct the UE to add a cell that is a synchronization and listening object of a broadcast channel and a paging channel. The added status indicator is carried by the first field of the above extension, and may be represented by data "01".

S707, the resident base station determines whether the UE needs to change the resident CELL according to the measurement result sent by the base station to which the CELL2 belongs. If the camped cell needs to be changed, steps S708 and S709 are executed. If the camped cell does not need to be changed, the camped base station returns to S703 to continue summarizing the measurement report of each measurement base station on the uplink TS of the UE.

In a specific implementation, the camping base station compares the measurement report generated by the camping base station with the measurement report sent by the base station to which the CELL2 belongs. And if the preset resident cell change condition is met, determining that the user equipment needs to change the resident cell. And if the preset resident cell change condition is not met, determining that the user equipment does not need to change the resident cell. Illustratively, the preset camped CELL change condition may be that the signal quality of the potential target CELL2 is better than the signal quality of the original camped CELL1, and the duration of the difference between the two exceeds the preset threshold is longer than the preset time.

S708, the camped base station sends a first camped CELL change instruction to the base station to which CELL2 belongs. And the first resident CELL change instruction is used for informing the base station to which the CELL2 belongs to that the CELL2 is taken as the resident CELL of the UE after the resident CELL is changed. The first resident cell change indication carries at least one of an identifier of the potential target cell, paging information, a cell list of a radio access notification cell, and measurement information, where the measurement information includes at least one of a measurement cell identifier, a measurement duration, a measurement threshold, and an information reporting condition.

Optionally, the first camped CELL change indication may be sent through an interface between the camped base station and the base station to which CELL2 belongs, for example, an Xn interface.

S709, the camped base station sends a second camped CELL change instruction to the measurement base station (i.e. the base station to which CELL3 belongs). And the second resident CELL change instruction is used for informing the measuring base station of the resident CELL of the UE after taking CELL2 as the changed resident CELL, and the second resident CELL change instruction carries the identifier of CELL 2. And after the user terminal changes the resident CELL, the measuring base station sends a measuring result to the base station to which the CELL2 belongs.

After the UE changes the camping CELL, the camping base station in steps S701-S708 will no longer be the camping base station of the UE, and the base station to which CELL2 belongs becomes the new camping base station of the UE, and is used as the measurement control point base station of the UE. And in the case that the resident base station in the steps S701-S708 can receive the TS of the UE, sending the measurement result of the UE to the base station to which the CELL2 belongs.

Optionally, if the UE moves fast, the method further includes:

s710, after receiving the first resident CELL change instruction, the base station to which CELL2 belongs sends a second paging message to the UE when judging that the signal quality of CELL1 meets the CELL release condition according to the received measurement result. The second paging message is used to indicate that the ue is no longer synchronized and listens to the broadcast channel and paging channel of the camped CELL (i.e., CELL1) before the change. Optionally, the second paging message carries a deletion status indicator and a camped cell identifier before change. The deletion status indicator may be carried by the first field of the above extension, and may be represented by data "10".

Fig. 8 is a flowchart illustrating a state management method according to another embodiment of the present application. In this embodiment, a first moving scenario shown in fig. 4, that is, a scenario in which the UE moves from an anchor CELL (CELL 1) to a non-anchor CELL (CELL 2), and an interaction process between each base station and between the base station and the UE will be described in detail. In this embodiment, the measurement control point base station is an anchor base station. Since the anchor CELL (CELL 1) is also the camping CELL at the same time when the UE starts moving, the camping base station and the anchor base station are both the base station to which CELL1 belongs. The potential target CELL is CELL 2. CELL1 and CELL2 are in the same RNA, RNA 1. In this embodiment, the UE refers to the same UE.

The method includes, but is not limited to, the steps of:

s801, the anchor base station sends a first measurement request to the measurement base station. Referring to fig. 4, in this embodiment, in the process of moving the UE from CELL1 to CELL2, CELL3 in RNA1 can also receive the TS signal of the UE, so that the base station to which CELL3 belongs is a measurement base station, and can generate a measurement result of an uplink TS of the UE.

The first measurement request is used for indicating measurement of an uplink TS of the UE, and the measurement request carries measurement control point indication information. Optionally, the measurement control point indication information measures control point indication information, where the measurement control point indication information is used to indicate that the measurement control point base station is an anchor base station. For the related description of the measurement control point indication information, please refer to the description in the previous embodiment, which is not described herein again.

S802, the measurement base station measures the uplink TS of the UE according to the first measurement request, and sends the measurement result to the anchor point base station. Optionally, after receiving the first measurement request, the base station to which CELL3 belongs continuously measures the uplink TS of the UE according to the measurement period in the measurement control information, and periodically sends the measurement result to the anchor base station. And after the base station to which the CELL3 belongs cannot receive the uplink TS of the UE for a certain time period, the measurement result is not sent to the anchor point base station.

Alternatively, the measurement result may be sent over an interface between the base station to which CELL3 belongs and the anchor base station, e.g. an Xn interface.

S803, the anchor base station determines the potential target CELL of the UE to be CELL2 according to the currently acquired measurement result. The measurement result includes a received measurement result from the measurement base station and a measurement result generated after the anchor base station itself measures the uplink TS of the UE.

The anchor base station may select one or more cells having better measurement results for the UE's uplink TS as potential target cells.

Optionally, the anchor base station may also refer to other factors based on the obtained measurement results when determining the potential target cell. For example, the anchor base station estimates the motion direction of the UE with reference to the historical motion trajectory of the UE, so as to select the CELL2 with a better measurement result in the motion direction of the UE as a new estimated resident CELL that is likely to become the UE in the future, that is, the potential target CELL is CELL 2.

S804, the anchor base station sends a second measurement request to the base station of CELL 2. Optionally, after determining that the potential target CELL is CELL2, the anchor base station learns the base station to which CELL2 belongs according to the correspondence between the CELLs in the stored RNA1 and the base station to which each CELL belongs. The anchor base station generates a measurement request to be sent to the base station to which the CELL2 belongs, wherein the measurement request carries measurement control point indication information, and the measurement control point indication information is used for indicating that the measurement control point base station is the anchor base station. For the related description of the measurement control point indication information, please refer to the description in the previous embodiment, which is not described herein again. Similarly to the first measurement request, the second measurement request further carries various measurement parameters, such as at least one of a measurement duration, a signal quality threshold, and measurement control information, where the measurement control information includes at least one of a terminal identifier, a measurement period, a measurement reporting condition, and a tracking signal of the ue.

Alternatively, the second measurement request may be sent over an interface between the anchor base station and the base station to which CELL2 belongs, e.g. an Xn interface.

S805, the base station to which CELL2 belongs sends the measurement result to the anchor base station. And the measurement result carries information generated after the base station to which the CELL2 belongs measures the uplink TS of the UE according to the parameters carried in the second measurement request. The process of measuring the uplink TS of the UE by the base station to which the CELL2 belongs is similar to that of other measuring base stations, and reference may be made to the description in S802, which is not described herein again.

Alternatively, the measurement result may be sent over an interface between the base station to which CELL2 belongs and the anchor base station, e.g., an Xn interface.

S806, the anchor base station sends the first paging message to the UE according to the measurement result sent by the base station to which the CELL2 belongs.

Specifically, when the anchor base station confirms that the signal quality of CELL2 is better according to the measurement report sent by the base station to which CELL2 belongs, the anchor base station sends a first paging message to the user, where the purpose of the first paging message is to instruct the user equipment to synchronize and monitor the broadcast channel and the paging channel of the target CELL.

Alternatively, the anchor base station may estimate the moving speed of the UE according to the historical moving track of the UE, and if the UE moves slowly, the first way of sending the paging message described in the above embodiment is adopted. And the anchor point base station determines whether the preset resident cell change condition is met or not according to the obtained measurement result, including the measurement result generated by the anchor point base station. That is, step S807 is directly performed, and when a preset change condition of the camping cell is satisfied, a first paging message is sent to the UE, where the paging message is used to instruct the UE to change from synchronizing or monitoring the broadcast channel and the paging channel of the camping cell to synchronizing and monitoring the broadcast channel and the paging channel of the potential target cell. Optionally, the first paging message carries a change status indicator and an identifier of the potential target cell, where the change status indicator is used to indicate the UE to change the cell that is a synchronization and monitoring object of the broadcast channel and the paging channel. For example, 2 fields may be extended based on the conventional paging message, where the first field is used to carry the status indicator and the second field is used to carry the identity of the potential target cell. In this embodiment, the first field may occupy 2 bits, and the change status indicator may be represented by data "00".

If it is determined that the UE moves fast according to the estimated moving speed of the UE, the second method of sending the paging message described in the above embodiment is adopted. The anchor base station determines whether a predetermined cell increase condition is satisfied according to the measurement result before performing step S807. And when the condition that the preset cell increasing condition is met is determined, the anchor base station sends a first paging message to the UE, wherein the paging message is used for indicating the user equipment to synchronize and monitor the broadcast channel and the paging channel of the potential target cell on the basis of continuously synchronizing or monitoring the broadcast channel and the paging channel of the resident cell. Optionally, the first paging message carries an addition status indicator and an identifier of a potential target cell, where the addition status indicator is used to instruct the UE to add a cell that is a synchronization and listening object of a broadcast channel and a paging channel. The added status indicator is carried by the first field of the above extension, and may be represented by data "01".

S807, the anchor base station determines whether the UE needs to change the resident CELL according to the measurement result sent by the base station to which the CELL2 belongs. If the resident cell needs to be changed, step S808 is performed. If the camped cell does not need to be changed, the camped base station returns to S803 to continue to summarize the measurement report of the uplink TS of the UE by each measurement base station.

In a specific implementation, the anchor base station compares a measurement report generated by the original resident CELL with a measurement report sent by the base station to which CELL2 belongs. And if the preset resident cell change condition is met, determining that the user equipment needs to change the resident cell. And if the preset resident cell change condition is not met, determining that the user equipment does not need to change the resident cell. Illustratively, the preset camped CELL change condition may be that the signal quality of the potential target CELL2 is better than the signal quality of the original camped CELL1, and the duration of the difference between the two exceeds the preset threshold is longer than the preset time.

S808, the anchor base station sends a first resident CELL change instruction to the base station to which the CELL2 belongs. And the first resident CELL change instruction is used for informing the base station to which the CELL2 belongs to that the CELL2 is taken as the resident CELL of the UE after the resident CELL is changed. The first camping cell change indication carries the identity of the potential target cell.

Optionally, the first camping CELL change instruction may be sent through an interface between the anchor base station and the base station to which CELL2 belongs, for example, an Xn interface.

After the UE changes the camping CELL, the camping base station in steps S801-S808 will no longer be the camping base station of the UE, the base station to which CELL2 belongs becomes a new camping base station of the UE, and the base station to which CELL2 belongs and the measurement base station still send the measurement result of the UE to the anchor base station.

Optionally, if the UE moves fast, the method further includes:

and S810, after the anchor base station sends the first resident CELL change instruction to the base station to which the CELL2 belongs, when the anchor base station judges that the signal quality of the CELL1 meets the CELL release condition according to the received measurement result, the anchor base station sends a second paging message to the base station to which the CELL2 belongs, and forwards the second paging message to the UE through the base station to which the CELL2 belongs. The second paging message is used to indicate that the ue is no longer synchronized and listens to the broadcast channel and paging channel of the camped CELL (i.e., CELL1) before the change. Optionally, the second paging message carries a deletion status indicator and a camped cell identifier before change. The deletion status indicator may be carried by the first field of the above extension, and may be represented by data "10".

Fig. 9 is a flowchart illustrating a state management method according to another embodiment of the present application. In this embodiment, a second moving scenario shown in fig. 4, that is, a scenario in which the UE moves from a non-anchor CELL (CELL 2) to a non-anchor CELL (CELL 3), and an interaction process between each base station and between the base station and the UE will be described in detail. In this embodiment, the camping base station (i.e. the base station to which CELL2 belongs) is the measurement control point base station, the anchor base station is the base station to which CELL1 belongs, and the potential target CELL is CELL 3. CELL2 and CELL3 are in the same RNA, RNA 1. In this embodiment, the UE refers to the same UE.

The method includes, but is not limited to, the steps of:

s901, the resident base station sends a first measurement request to the measurement base station. Referring to fig. 4, in the present embodiment, if there are other base stations in the RNA1 in addition to CELL1, CELL2, and CELL3, the other base stations are taken as measurement base stations, and the measurement base stations can generate measurement results regarding uplink TSs of the UE.

And S902, the measurement base station measures the uplink TS of the UE according to the first measurement request, and sends the measurement result to the resident base station. Optionally, after receiving the first measurement request, the measurement base station continuously measures the uplink TS of the UE according to a measurement period in the measurement control information, and periodically sends a measurement result to the camped base station. And after the measuring base station does not receive the uplink TS of the UE for a certain period of time, the measuring base station does not send the measuring result to the resident base station.

Alternatively, the measurement results may be sent over an interface between the measurement base station and the camping base station, e.g. an Xn interface.

S903, the resident base station determines the potential target CELL of the UE to be CELL3 according to the currently acquired measurement result. The measurement result includes a received measurement result from the measurement base station and a measurement result generated after the resident base station measures the uplink TS of the UE.

Optionally, the camping base station may also refer to other factors on the basis of the obtained measurement results when determining the potential target cell. For example, the camping base station estimates the motion direction of the UE with reference to the historical motion trajectory of the UE, and thus selects the CELL3 with a better measurement result in the motion direction of the UE as a new predicted camping CELL that is likely to become the UE in the future, that is, the potential target CELL is CELL 3.

S904, the resident base station sends a second measurement request to the base station of CELL 3. Optionally, after the camping base station determines that the potential target CELL is CELL3, the base station to which CELL3 belongs is obtained according to the stored correspondence between each CELL in RNA1 and the base station to which each CELL belongs. The resident base station generates a measurement request to be sent to the base station to which the CELL3 belongs, wherein the measurement request carries measurement control point indication information, and the measurement control point indication information is used for indicating that the measurement control point base station is the resident base station. For the related description of the measurement control point indication information, please refer to the description in the previous embodiment, which is not described herein again. Similarly to the first measurement request, the second measurement request further carries various measurement parameters, such as at least one of a measurement duration, a signal quality threshold, and measurement control information, where the measurement control information includes at least one of a terminal identifier, a measurement period, a measurement reporting condition, and a tracking signal of the ue.

Alternatively, the second measurement request may be sent over an interface between the camped base station and the base station to which CELL3 belongs, e.g. an Xn interface.

S905, the base station of CELL3 sends the measuring result to the resident base station. And the measurement result carries information generated after the base station to which the CELL3 belongs measures the uplink TS of the UE according to the parameters carried in the second measurement request. The process of measuring the uplink TS of the UE by the base station to which the CELL3 belongs is similar to that of other measurement base stations, and reference may be made to the description in S902, which is not described herein again.

S906, the resident base station sends a first paging message to the UE according to the measuring result sent by the base station to which the CELL3 belongs.

Specifically, when the resident base station confirms that the signal quality of CELL3 is better according to the measurement report sent by the base station to which CELL3 belongs, a first paging message is sent to the user, and the purpose of the first paging message is to instruct the user equipment to synchronize and monitor the broadcast channel and the paging channel of the target CELL.

Alternatively, the camped base station may estimate the moving speed of the UE according to the historical moving track of the UE, and if the UE moves slowly, the first way of sending the paging message described in the above embodiment is adopted. And the resident base station determines whether the preset resident cell change condition is met or not according to the obtained measurement result, including the measurement result generated by the resident base station. That is, step S907 is directly executed, and when a preset change condition of the residential cell is met, a first paging message is sent to the UE, where the first paging message is used to instruct the UE to change from synchronizing or monitoring the broadcast channel and the paging channel of the residential cell to synchronizing and monitoring the broadcast channel and the paging channel of the potential target cell. Optionally, the first paging message carries a change status indicator and an identifier of the potential target cell, where the change status indicator is used to indicate the UE to change the cell that is a synchronization and monitoring object of the broadcast channel and the paging channel. For example, 2 fields may be extended based on the conventional paging message, where the first field is used to carry the status indicator and the second field is used to carry the identity of the potential target cell. In this embodiment, the first field may occupy 2 bits, and the change status indicator may be represented by data "00".

If it is determined that the UE moves fast according to the estimated moving speed of the UE, the second method of sending the paging message described in the above embodiment is adopted. The camped base station determines whether a predetermined cell increase condition is satisfied according to the measurement result before performing step S907. And when the condition that the preset cell increasing condition is met is determined, the resident base station sends a first paging message to the UE, wherein the paging message is used for indicating the user equipment to synchronize and monitor the broadcast channel and the paging channel of the potential target cell on the basis of continuing synchronizing or monitoring the broadcast channel and the paging channel of the resident cell. Optionally, the first paging message carries an addition status indicator and an identifier of a potential target cell, where the addition status indicator is used to instruct the UE to add a cell that is a synchronization and listening object of a broadcast channel and a paging channel. The added status indicator is carried by the first field of the above extension, and may be represented by data "01".

S907, the resident base station determines whether the UE needs to change the resident CELL according to the measurement result sent by the base station to which the CELL3 belongs. If the resident cell needs to be changed, steps S908-S910 are executed. If the camped cell does not need to be changed, the camped base station returns to S903 to continue to summarize the measurement report of the uplink TS of the UE by each measurement base station.

In a specific implementation, the camping base station compares the measurement report generated by the camping base station with the measurement report sent by the base station to which the CELL3 belongs. And if the preset resident cell change condition is met, determining that the user equipment needs to change the resident cell. And if the preset resident cell change condition is not met, determining that the user equipment does not need to change the resident cell. Illustratively, the preset camped CELL change condition may be that the signal quality of the potential target CELL3 is better than the signal quality of the original camped CELL2, and the duration of the difference between the two exceeds the preset threshold is longer than the preset time.

S908, the camped base station sends a first camped CELL change instruction to the base station to which CELL3 belongs. And the first resident CELL change instruction is used for informing the base station to which the CELL3 belongs to that the CELL3 is taken as the resident CELL of the UE after the resident CELL is changed. The first resident cell change indication carries at least one of an identifier of the potential target cell, paging information, a cell list of a radio access notification cell, and measurement information, where the measurement information includes at least one of a measurement cell identifier, a measurement duration, a measurement threshold, and an information reporting condition.

Alternatively, the first camped CELL change indication may be sent over an interface between the camped base station and the base station to which CELL3 belongs, for example an Xn interface.

S909, the camped base station transmits a second camped cell change instruction to the measurement base station. And the second resident CELL change instruction is used for informing the measuring base station of the resident CELL of the UE after the CELL3 is taken as the changed resident CELL, and the second resident CELL change instruction carries the identifier of the CELL 3. And after the user terminal changes the resident CELL, the measuring base station sends a measuring result to the base station to which the CELL3 belongs.

S910, the residing base station sends a third residing cell change instruction to the anchor base station. And the third resident CELL change instruction is used for informing the anchor point base station of the resident CELL of the UE after the CELL3 is taken as the changed resident CELL, and the third resident CELL change instruction carries the identification of the CELL 3. And after the user terminal changes the resident CELL, the anchor base station sends a measurement result to the base station to which the CELL3 belongs.

After the UE changes the camping CELL, the camping base station in steps S901-S908 is no longer the camping base station of the UE, and the base station to which CELL3 belongs becomes a new camping base station of the UE, and is used as the measurement control point base station of the UE. In the case that the camping base station in steps S901-S908 can receive the TS of the UE, the measurement result of the UE is sent to the base station to which CELL3 belongs.

Optionally, if the UE moves fast, the method further includes:

s911, after receiving the first resident CELL change instruction, the base station to which the CELL3 belongs sends a second paging message to the UE when judging that the signal quality of the CELL2 meets the CELL release condition according to the received measurement result. The second paging message is used to indicate that the ue is no longer synchronized and listens to the broadcast channel and paging channel of the camped CELL (i.e., CELL 2) before the change. Optionally, the second paging message carries a deletion status indicator and a camped cell identifier before change. The deletion status indicator may be carried by the first field of the above extension, and may be represented by data "10".

Fig. 10 is a flowchart illustrating a state management method according to another embodiment of the present application. In this embodiment, a second moving scenario shown in fig. 4, that is, a scenario in which the UE moves from a non-anchor CELL (CELL 2) to a non-anchor CELL (CELL 3), and an interaction process between each base station and between the base station and the UE will be described in detail. In this embodiment, the anchor base station (i.e. the base station to which CELL1 belongs) is the measurement control point base station, the camped base station is the base station to which CELL2 belongs, and the potential target CELL is CELL 3. CELL2 and CELL3 are in the same RNA, RNA 1. In this embodiment, the UE refers to the same UE.

The method includes, but is not limited to, the steps of:

s1001, the anchor base station sends a first measurement request to the measurement base station. Referring to fig. 4, in the present embodiment, if there are other base stations in the RNA1 in addition to CELL1, CELL2, and CELL3, the other base stations are taken as measurement base stations, and the measurement base stations can generate measurement results regarding uplink TSs of the UE.

The first measurement request is used for indicating measurement of an uplink TS of the UE, and the measurement request carries measurement control point indication information. Optionally, the measurement control point indication information is measurement control point indication information, and the measurement control point indication information is used to indicate that the measurement control point base station is a camping base station. For the related description of the measurement control point indication information, please refer to the description in the previous embodiment, which is not described herein again.

S1002, the measurement base station measures the uplink TS of the UE according to the first measurement request, and sends the measurement result to the anchor point base station. Optionally, after receiving the first measurement request, the measurement base station continuously measures the uplink TS of the UE according to a measurement period in the measurement control information, and periodically sends a measurement result to the anchor base station. And after the measurement base station does not receive the uplink TS of the UE for a certain period of time, the measurement base station does not send the measurement result to the anchor point base station.

Alternatively, the measurement results may be sent over an interface between the measurement base station and the anchor base station, e.g., an Xn interface.

S1003, the anchor base station determines the potential target CELL of the UE to be CELL3 according to the currently acquired measurement result. The measurement result includes a received measurement result from the measurement base station and a measurement result generated after the resident cell measures the uplink TS of the UE. Optionally, if the anchor cell can also receive the TS of the UE, the measurement result further includes a measurement result generated by the anchor base station itself.

Optionally, the anchor base station may also refer to other factors based on the obtained measurement results when determining the potential target cell. For example, the anchor base station estimates the motion direction of the UE with reference to the historical motion trajectory of the UE, and thus selects the CELL3 with a better measurement result in the motion direction of the UE as a new estimated resident CELL that is likely to become the UE in the future, that is, the potential target CELL is CELL 3.

S1004, the anchor base station sends a second measurement request to the base station of CELL 3. Optionally, after determining that the potential target CELL is CELL3, the anchor base station learns the base station to which CELL3 belongs according to the correspondence between the CELLs in the stored RNA1 and the base station to which each CELL belongs. The anchor base station generates a measurement request to be sent to the base station to which the CELL3 belongs, wherein the measurement request carries measurement control point indication information, and the measurement control point indication information is used for indicating that the measurement control point base station is a resident base station. For the related description of the measurement control point indication information, please refer to the description in the previous embodiment, which is not described herein again. Similarly to the first measurement request, the second measurement request further carries various measurement parameters, such as at least one of a measurement duration, a signal quality threshold, and measurement control information, where the measurement control information includes at least one of a terminal identifier, a measurement period, a measurement reporting condition, and a tracking signal of the ue.

Alternatively, the second measurement request may be sent over an interface between the anchor base station and the base station to which CELL3 belongs, e.g. an Xn interface.

S1005, the base station of CELL3 sends the measuring result to the anchor base station. And the measurement result carries information generated after the base station to which the CELL3 belongs measures the uplink TS of the UE according to the parameters carried in the second measurement request. The process of measuring the uplink TS of the UE by the base station to which the CELL3 belongs is similar to that of other measuring base stations, and reference may be made to the description in S1002, which is not described herein again.

S1006, the anchor base station sends a first paging message to the UE through the resident base station according to the measurement result sent by the base station to which the CELL3 belongs.

Specifically, when the anchor base station confirms that the signal quality of CELL3 is better according to the measurement report sent by the base station to which CELL3 belongs, the anchor base station sends a first paging message to the user through the camping base station, where the first paging message is intended to instruct the user equipment to synchronize and monitor the broadcast channel and the paging channel of the potential target CELL.

Alternatively, the anchor base station may estimate the moving speed of the UE according to the historical moving track of the UE, and if the UE moves slowly, the first way of sending the paging message described in the above embodiment is adopted. And the anchor point base station determines whether the preset resident cell change condition is met or not according to the obtained measurement result, including the measurement result generated by the anchor point base station. That is, step S1007 is directly executed, and when a preset change condition of the camping cell is met, a first paging message is sent to the UE through the camping base station, where the paging message is used to instruct the UE to change from synchronizing or monitoring the broadcast channel and the paging channel of the camping cell to synchronizing and monitoring the broadcast channel and the paging channel of the potential target cell. Optionally, the first paging message carries a change status indicator and an identifier of the potential target cell, where the change status indicator is used to indicate the UE to change the cell that is a synchronization and monitoring object of the broadcast channel and the paging channel. For example, 2 fields may be extended based on the conventional paging message, where the first field is used to carry the status indicator and the second field is used to carry the identity of the potential target cell. In this embodiment, the first field may occupy 2 bits, and the change status indicator may be represented by data "00".

If it is determined that the UE moves fast according to the estimated moving speed of the UE, the second method of sending the paging message described in the above embodiment is adopted. The anchor base station determines whether a predetermined cell increase condition is satisfied according to the measurement result before performing step S1007. And when the condition that the preset cell increasing condition is met is determined, the anchor point base station sends a first paging message to the UE through the resident base station, wherein the paging message is used for indicating the user equipment to synchronize and monitor the broadcast channel and the paging channel of the potential target cell on the basis of continuously synchronizing or monitoring the broadcast channel and the paging channel of the resident cell. Optionally, the first paging message carries an addition status indicator and an identifier of a potential target cell, where the addition status indicator is used to instruct the UE to add a cell that is a synchronization and listening object of a broadcast channel and a paging channel. The added status indicator is carried by the first field of the above extension, and may be represented by data "01".

S1007, the anchor base station determines whether the UE needs to change the resident CELL according to the measurement result sent by the base station to which the CELL3 belongs. If the resident cell needs to be changed, steps S1008-S1009 are performed. If the camped cell does not need to be changed, the camped base station returns to S1003 to continue to summarize the measurement report of the uplink TS of the UE from each measurement base station.

In a specific implementation, the anchor base station compares the measurement report of the original resident CELL with the measurement report sent by the base station to which the CELL3 belongs. And if the preset resident cell change condition is met, determining that the user equipment needs to change the resident cell. And if the preset resident cell change condition is not met, determining that the user equipment does not need to change the resident cell. Illustratively, the preset camped CELL change condition may be that the signal quality of the potential target CELL3 is better than the signal quality of the original camped CELL2, and the duration of the difference between the two exceeds the preset threshold is longer than the preset time.

S1008, the anchor base station sends a first resident CELL change instruction to the base station to which the CELL3 belongs. And the first resident CELL change instruction is used for informing the base station to which the CELL3 belongs to that the CELL3 is taken as the resident CELL of the UE after the resident CELL is changed. The first camping cell change indication carries the identity of the potential target cell.

Optionally, the first camping CELL change instruction may be sent through an interface between the anchor base station and the base station to which CELL3 belongs, for example, an Xn interface.

S1009, the anchor base station sends a second camping cell change instruction to the camping base station. And the second resident CELL change instruction is used for informing the resident base station of the resident CELL of the UE after the resident base station takes CELL3 as the changed resident CELL, and the second resident CELL change instruction carries the identifier of the CELL 3. After the user terminal changes the resident cell, the resident base station still sends the measurement result to the anchor base station.

After the UE changes the camping CELL, the camping base station in steps S1001-S1009 will no longer be the camping base station of the UE, the base station to which CELL3 belongs becomes the new camping base station of the UE, and the base stations to which CELL2 and CELL3 belong and the measuring base station still send the measurement result of the UE to the anchor base station.

Optionally, if the UE moves fast, the method further includes:

s1010, after the anchor point base station sends the first resident CELL change instruction to the base station to which CELL3 belongs through the resident base station, when the anchor point base station judges that the signal quality of CELL2 meets the CELL release condition according to the received measurement result, the anchor point base station sends a second paging message to the base station to which CELL3 belongs, and the base station to which CELL3 belongs forwards the second paging message to the UE. The second paging message is used to indicate that the ue is no longer synchronized and listens to the broadcast channel and paging channel of the camped CELL (i.e., CELL 2) before the change. Optionally, the second paging message carries a deletion status indicator and a camped cell identifier before change. The deletion status indicator may be carried by the first field of the above extension, and may be represented by data "10".

Fig. 11 is a flowchart illustrating a state management method according to another embodiment of the present application. The third moving scenario shown in fig. 4, that is, the UE moves between CELLs across RNA, for example, from CELL3 to CELL4, and the interaction process between the base stations and the UE is described in detail in this embodiment. In this embodiment, the camping base station (i.e. the base station to which CELL3 belongs) is the measurement control point base station, the anchor base station is the base station to which CELL1 belongs, and the potential target CELL is CELL 4. CELL3 and CELL4 are in different RNAs. In this embodiment, the UE refers to the same UE.

S1101, the camping base station sends a first measurement request to the measurement base station. Referring to fig. 4, in this embodiment, in the process of moving the UE from CELL3 to CELL4, CELL2 in RNA1 can also receive the TS signal of the UE, so that the base station to which CELL2 belongs is a measurement base station, and can generate a measurement result of an uplink TS of the UE.

And S1102, the measurement base station measures the uplink TS of the UE according to the first measurement request, and sends the measurement result to the resident base station. Optionally, after receiving the first measurement request, the measurement base station continuously measures the uplink TS of the UE according to a measurement period in the measurement control information, and periodically sends a measurement result to the camped base station. And after the uplink TS of the UE cannot be received by the measurement cell covered by the measurement base station for a certain period of time, the measurement result is not sent to the resident base station.

S1103, the camping base station determines that the potential target CELL of the UE is CELL4 according to the currently obtained measurement result. The measurement result includes a received measurement result from the measurement base station and a measurement result generated after the resident cell measures the uplink TS of the UE.

Optionally, the camping base station may also refer to other factors on the basis of the obtained measurement results when determining the potential target cell. For example, the camping base station estimates the motion direction of the UE with reference to the historical motion trajectory of the UE, and thus selects the CELL4 with a better measurement result in the motion direction of the UE as a new predicted camping CELL that is likely to become the UE in the future, that is, the potential target CELL is CELL 4.

S1104, the resident base station sends a second measurement request to the base station of CELL 4. The second measurement request is used for indicating the measurement of the uplink TS of the UE. Similarly to the first measurement request, optionally, the second measurement request may further carry measurement control point indication information, where the measurement control point indication information is used to indicate that the measurement control point base station is a base station to which the camped cell of the UE belongs, and the specific method is not described again.

Alternatively, the camped base station determines whether the potential target cell and the camped cell are in the same RNA, and if the potential target cell and the camped cell are in different RNAs, performs the following steps.

S1105, the base station of CELL4 makes resource conflict judgment. And if the resource conflicts, namely the resource used by the uplink TS sent by the UE is occupied by other UEs, the base station to which the CELL4 belongs sends a conflict indication to the resident base station, wherein the conflict indication is used for indicating that the uplink tracking signal sent by the UE is unavailable in the RNA of the potential target CELL. And the conflict indication carries the identity of the UE. After receiving the collision indication, the camping base station performs S1106-S1107.

And if the resources do not conflict, the base station to which the CELL4 belongs sends a measurement result to the resident base station. After receiving the measurement result, the camping base station performs S1108-S1110.

S1106, the camped base station sends a paging message to the UE. The paging message is used for informing the UE to start measuring the downlink signal of the resident cell of the UE, and initiating a radio resource control reconfiguration process according to the measurement result of the downlink signal. Optionally, the paging message carries a downlink measurement indicator. After receiving the paging message, the UE synchronizes and monitors the broadcast channel and the paging channel of the resident cell, synchronizes and monitors the broadcast channels of other cells, and starts to measure the downlink reference signals of the resident cell and other cells. And the UE initiates a radio resource reconfiguration process according to the measurement result of the downlink reference signal.

Optionally, since CELL4 is a CELL in which the UE may camp, which is determined by the camped base station, this indicates that CELL4 has a better measurement result for measuring the TS of the UE in each measurement CELL. The quality of the uplink TS and the quality of the downlink reference signal have a certain reference, so the downlink reference signal of CELL4 may have a better quality in all the neighboring CELLs of the UE. Therefore, the camping base station can inform the UE of the identification of the CELL4, so that the UE can measure the downlink reference signal of the potential target CELL as a reference basis for initiating the radio resource reconfiguration process. In this case, the camping base station may further instruct, through the paging message, the UE to start measurement on the downlink signals of the camping CELL and the CELL4 of the UE, and initiate the radio resource control reconfiguration procedure according to the measurement result on the downlink signals of the camping CELL and the CELL 4. Optionally, the paging message further carries an added status indicator and an identifier of CELL4, where the added status indicator is used to indicate that the UE adds a CELL serving as a measurement object of a downlink reference signal. After receiving the paging message carrying the downlink measurement indicator, the added state indicator and the potential target cell identifier, the UE synchronizes and monitors the broadcast channel and the paging channel of the resident cell, synchronizes and monitors the broadcast channels of the potential target cell and other cells, and starts measuring the downlink reference signals of the resident cell, the potential target cell and other cells. And the UE initiates a radio resource reconfiguration process according to the measurement result of the downlink reference signal.

S1107, the camping base station sends a measurement change instruction to the anchor base station of the UE. Wherein the measurement change instruction is used for notifying a base station to which an anchor cell of the UE belongs that the measurement mode of the UE is changed to measurement of the downlink signal. And the measurement change indication carries the identity of the UE.

S1108, the resident base station determines whether the measurement change condition is satisfied according to the measurement result sent by the base station to which the CELL4 belongs. If the measurement change condition is satisfied, the camping base station performs S1109, and if the measurement change condition is not satisfied, the camping base station continues to receive the measurement results from each measurement base station until the measurement change condition is satisfied according to the obtained measurement results, and then performs S1109.

S1109, the resident base station sends a paging message to the UE. For the explanation of the paging message, refer to the description in S1106 described above.

S1110, the camping base station sends a measurement change indication to the anchor base station of the UE. Wherein the measurement change instruction is used for notifying a base station to which an anchor cell of the UE belongs that the measurement mode of the UE is changed to measurement of the downlink signal. And the measurement change indication carries the identity of the UE.

Fig. 12 is a flowchart illustrating a state management method according to another embodiment of the present application. The third moving scenario shown in fig. 4, that is, the UE moves between CELLs across RNA, for example, from CELL3 to CELL4, and the interaction process between the base stations and the UE is described in detail in this embodiment. In this embodiment, the anchor base station (i.e. the base station to which CELL1 belongs) is the measurement control point base station, the camped base station is the base station to which CELL3 belongs, and the potential target CELL is CELL 4. CELL3 and CELL4 are in different RNAs. In this embodiment, the UE refers to the same UE.

S1201, the anchor base station sends a first measurement request to the measurement base station. Referring to fig. 4, in this embodiment, in the process of moving the UE from CELL3 to CELL4, CELL2 in RNA1 can also receive the TS signal of the UE, so that the base station to which CELL2 belongs is a measurement base station, and can generate a measurement result of an uplink TS of the UE.

And S1202, the measurement base station measures the uplink TS of the UE according to the first measurement request and sends the measurement result to the anchor point base station. Optionally, after receiving the first measurement request, the measurement base station continuously measures the uplink TS of the UE according to a measurement period in the measurement control information, and periodically sends a measurement result to the camped base station. And after the measuring base station does not receive the uplink TS of the UE for a certain period of time, the measuring base station does not send the measuring result to the resident base station.

S1203, the anchor point base station determines that the potential target CELL of the UE is CELL4 according to the currently acquired measurement result. The measurement result includes a received measurement result from the measurement base station and a measurement result generated after the resident cell measures the uplink TS of the UE.

Optionally, the anchor base station may also refer to other factors based on the obtained measurement results when determining the potential target cell. For example, the camping base station estimates the motion direction of the UE with reference to the historical motion trajectory of the UE, and thus selects the CELL4 with a better measurement result in the motion direction of the UE as a new predicted camping CELL that is likely to become the UE in the future, that is, the potential target CELL is CELL 4.

S1204, the anchor base station sends a second measurement request to the base station of CELL 4. The second measurement request is used for indicating the uplink TS of the user equipment UE to be measured. Similarly to the first measurement request, optionally, the second measurement request may further carry measurement control point indication information, where the measurement control point indication information is used to indicate that the measurement control point base station is a base station to which the camped cell of the UE belongs, and the specific method is not described again.

Alternatively, the anchor base station determines whether the potential target cell and the resident cell are in the same RNA, and if the potential target cell and the resident cell are in different RNAs, the following steps are performed.

And S1205, the base station to which the CELL4 belongs carries out resource conflict judgment. And if the resource conflicts, namely the resource used by the uplink TS sent by the UE is occupied by other UEs, the base station to which the CELL4 belongs sends a conflict indication to the anchor base station, wherein the conflict indication is used for indicating that the uplink TS sent by the UE is unavailable in the RNA in which the CELL4 is located. And the conflict indication carries the identity of the UE. After receiving the collision indication, the anchor base station performs S1206.

And if the resources do not conflict, the base station to which the CELL4 belongs sends a measurement result to the anchor point base station. After receiving the measurement result, the anchor base station performs S1207-S1208.

S1206, the anchor base station sends a paging message to the UE through the resident base station. The paging message is used for informing the UE to start measuring the downlink signal of the resident cell of the UE, and initiating a radio resource control reconfiguration process according to the measurement result of the downlink signal. Optionally, the paging message carries a downlink measurement indicator. After receiving the paging message, the UE synchronizes and monitors the broadcast channel and the paging channel of the resident cell, synchronizes and monitors the broadcast channels of other cells, and starts to measure the downlink reference signals of the resident cell and other cells. And the UE initiates a radio resource reconfiguration process according to the measurement result of the downlink reference signal.

Optionally, since CELL4 is a CELL in which the UE may camp, which is determined by the anchor base station, this indicates that CELL4 has a better measurement result for measuring the TS of the UE in each measurement CELL. The quality of the uplink TS and the quality of the downlink reference signal have a certain reference, so the downlink reference signal of CELL4 may have a better quality in all the neighboring CELLs of the UE. Therefore, the anchor base station can inform the UE of the CELL4 identifier, so that the UE can measure the downlink reference signal of CELL4 as a reference basis for initiating the radio resource reconfiguration process. In this case, the anchor base station may further instruct, through the paging message, the UE to start measurement on the downlink signals of the CELL where the UE resides and the CELL4, and initiate a radio resource control reconfiguration procedure according to the measurement result on the downlink signals of the CELL where the UE resides and the CELL 4. Optionally, the paging message further carries an added status indicator and an identifier of CELL4, where the added status indicator is used to indicate that the UE adds a CELL serving as a measurement object of a downlink reference signal. After receiving the paging message carrying the downlink measurement indicator, the added state indicator and the potential target cell identifier, the UE synchronizes and monitors the broadcast channel and the paging channel of the resident cell, synchronizes and monitors the broadcast channels of the potential target cell and other cells, and starts measuring the downlink reference signals of the resident cell, the potential target cell and other cells. And the UE initiates a radio resource reconfiguration process according to the measurement result of the downlink reference signal.

S1207, the anchor point base station determines whether the measurement change condition is satisfied according to the measurement result sent by the base station to which the potential target cell belongs. If the measurement change condition is satisfied, the anchor base station performs S1208, and if the measurement change condition is not satisfied, the anchor base station continues to receive the measurement results from the respective measurement base stations until it is determined that the measurement change condition is satisfied according to the obtained measurement results, and then performs S1208.

S1208, the anchor base station sends a paging message to the UE through the resident base station. For the explanation of the paging message, refer to the description in S1206 described above.

Fig. 13 is a schematic structural diagram of a base station device according to an embodiment of the present application. The base station apparatus may be used as the measurement control point base station in fig. 3, fig. 5-12. As shown in fig. 13, the base station device includes one or more transceivers 131 and one or more baseband units (BBUs) 132. The transceiver 131 may be referred to as a Remote Radio Unit (RRU), a transceiver unit, a transceiver, or a transceiver circuit. The transceiver 131 may include at least one antenna 1311 and a radio frequency unit 1312.

The transceiver 131 is mainly used for transceiving radio frequency signals and converting radio frequency signals and baseband signals, for example, is used for sending the first message, the second message, the third message, and the like described in the above embodiments to the UE, sending a camping cell change instruction to the measurement base station, receiving a measurement result sent by the measurement base station, and the like. The processor 132 is mainly used for performing baseband processing, controlling a base station, and the like. The transceiver 131 and the baseband unit 132 may be physically disposed together or may be physically disposed separately, i.e., distributed base stations.

The baseband unit 132 is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like.

In an example, the baseband unit 132 may be formed by one or more boards, and the boards may jointly support a radio access network (e.g., an LTE network) of a single access system, or may respectively support radio access networks of different access systems. The baseband unit 132 includes a processor 1321. The processor 1321 may be configured to control the base station shown in fig. 13 to perform the procedures performed by the measurement control point base station in the foregoing embodiments. The baseband unit 132 may also optionally include a memory 1322 to store the necessary instructions and data.

Fig. 14 provides a schematic structural diagram of a UE. The UE may perform the functions of the UE in the scenarios or flows shown in fig. 5-12. For convenience of explanation, fig. 14 shows only main components of the UE. As shown in fig. 14, the UE includes a processor 1402, a memory, control circuitry, an antenna, and input-output devices. The processor is mainly configured to process communication protocols and communication data, and to control the entire UE, execute software programs, and process data of the software programs, for example, to support the UE to perform actions described in the sections of fig. 5 to 12. The memory is used primarily for storing software programs and data. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuitry and antenna together may also be referred to as a transceiver 1401 for primarily transceiving radio frequency signals in the form of electromagnetic waves. For example, the method may be used to perform the receiving of the message sent by the base station to which the currently camped cell belongs in fig. 5 to 12, and optionally, the message may be sent in the form of a paging message.

When the user device is powered on, the processor 1402 may read the software program stored in the memory, interpret and execute the instructions of the software program, and process the data of the software program. And when the transceiver receives the message sent by the base station, executing the corresponding function according to the information carried in the message. For example:

a transceiver 1401 for receiving a first message at a first time, the first message being for instructing the user equipment to synchronize or listen to a broadcast channel and a paging channel of a potential target cell, the potential target cell being in a same RNA as a camped cell of the user equipment at the first time.

A processor 1402 configured to synchronize or monitor a broadcast channel and a paging channel of the first potential target cell according to the first message.

Optionally, the first message is used to instruct the ue to change from synchronizing or monitoring the broadcast channel and the paging channel of the camping cell at the first time to synchronizing and monitoring the broadcast channel and the paging channel of the potential target cell. Optionally, the first message carries a change status indicator and an identifier of the first potential target cell, where the change status indicator is used to indicate the ue to change a cell that is a synchronization or monitoring object of a broadcast channel and a paging channel. The processor 1402, further configured to obtain the change status indicator and the identity of the potential target cell from the first message; and changing the broadcast channel and the paging channel of the resident cell in the first time into the broadcast channel and the paging channel of the potential target cell by synchronizing or monitoring the broadcast channel and the paging channel of the resident cell at the first time according to the change state indicator and the identification of the potential target cell.

Optionally, the first message is used to instruct the ue to synchronize or monitor the broadcast channel and the paging channel of the first potential target cell on the basis of continuing to synchronize or monitor the broadcast channel and the paging channel of the camping cell at the first time. Optionally, the first message carries an addition status indicator and an identifier of the potential target cell, where the addition status indicator is used to indicate the ue to add a cell that is a synchronization or listening object of a broadcast channel and a paging channel. The processor 1402, further configured to obtain the incremental status indicator and the identity of the first potential target cell from the first message; and synchronizing or monitoring the broadcast channel and the paging channel of the first potential target cell on the basis of continuously synchronizing or monitoring the broadcast channel and the paging channel of the resident cell at the first moment according to the increment status indicator and the identification of the first potential target cell. The transceiver 1401 is further configured to receive a second message at a second time, where the second message is used to indicate that the ue is no longer synchronized or monitors the broadcast channel and the paging channel of the camping cell at the first time; the processor 1402 is further configured to, according to the second message, no longer synchronize and monitor a broadcast channel and a paging channel of the camping cell at the first time. The second message carries a deletion status indicator and an identifier of a resident cell at the first moment, wherein the deletion status indicator is used for indicating the user equipment to delete a cell which is a synchronization or monitoring object of a broadcast channel and a paging channel; the processor 1402 is further configured to obtain the deletion status indicator and the identity of the camped cell at the first time from the second message; and according to the deletion state indicator and the identification of the resident cell at the first moment, the broadcast channel and the paging channel of the resident cell at the first moment are not synchronized or monitored any more.

Optionally, after receiving the first message or the second message, the transceiver 1401 is further configured to receive a third message at a third time, where the third message is used to instruct the user equipment to start measurement on the camping cell at the third time and downlink signals of neighboring cells of the camping cell at the third time. The processor 1402 starts to measure the camping cell at the third time and the downlink signal of the neighboring cell of the camping cell at the third time according to the third message; and initiating a radio resource control reconfiguration process when the cell reselection condition is met according to the measurement result of the downlink signal. Optionally, the third message carries a downlink measurement indicator; the processor 1402 obtaining the downlink measurement indicator from the third message; and measuring downlink signals of the resident cell at the third moment and the neighboring cells of the resident cell at the third moment according to the downlink measurement indicator.

Optionally, the third message is further used to instruct the ue to start measurement on a downlink signal of a second potential target cell, where the second potential target cell and the camping cell at the third time are in different RNAs. The processor 1402 is further configured to, after receiving the third message, start measurement on a downlink signal of the second potential target cell according to the third message; and initiating a radio resource control reconfiguration request when a cell reselection condition is met according to the measurement results of the downlink reference signals of the resident cell at the third moment, the neighboring cells of the resident cell at the third moment and the second potential target cell. In this case, the third message also carries an addition status indicator and an identification of the second potential target cell.

The embodiment of the application also provides a mobility management system of the UE, which comprises a measurement control point base station and one or more measurement base stations.

The base station comprises a measurement control point base station and a measurement control point base station, wherein the measurement control point base station is used for sending a first measurement request to one or more measurement base stations, and the measurement request is used for indicating to measure an uplink tracking signal of user equipment; and determining a potential target cell of the user equipment according to a measurement result generated by the user equipment and/or a measurement result returned by the measurement base station, wherein the measurement result is generated based on an uplink tracking signal sent by the user equipment.

And the measurement base station is configured to receive the first measurement request, measure an uplink tracking signal of the user equipment according to the first measurement request, and send a measurement result obtained by measurement to the measurement control point base station.

For the description of the measurement control point base station and the measurement base station, reference is made to the description in the foregoing embodiments, and details are not repeated here.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A mobility management method of a User Equipment (UE), comprising:

a measurement control point base station sends a first measurement request to one or more measurement base stations, wherein the measurement request is used for indicating to measure an uplink tracking signal of user equipment;

the measurement control point base station determines a potential target cell of the user equipment according to a measurement result generated by the measurement control point base station and/or a measurement result returned by the measurement base station, wherein the measurement result is generated based on an uplink tracking signal sent by the user equipment;

the measurement control point base station sends a second measurement request to the base station to which the potential target cell belongs, wherein the second measurement request carries measurement control point indication information;

when the potential target cell and the resident cell of the user equipment are located in the same radio access notification area RNA, the measurement control point base station receives a measurement result sent by a base station to which the potential target cell belongs, wherein the measurement result sent by the potential target cell is generated by the base station to which the potential target cell belongs based on an uplink tracking signal sent by the user equipment and received in the potential target cell;

and the measurement control point base station determines whether the user equipment needs to change the resident cell according to the measurement result sent by the base station to which the potential target cell belongs.

2. The method of claim 1, wherein the first measurement request carries the measurement control point indication information, and wherein the measurement control point indication information is used to indicate that the measurement control point base station is a base station to which an anchor cell of the ue belongs or a base station to which a camping cell of the ue belongs.

3. The method of claim 1, wherein the measurement control point base station is a base station to which a camping cell of the user equipment belongs or a base station to which an anchor cell of the user equipment belongs.

4. The method according to claim 1, wherein the measurement control point base station is a base station to which a camped cell of the user equipment belongs, and the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the camped cell of the user equipment belongs.

5. The method of claim 4, wherein when the UE needs to change the camped cell, the method further comprises:

and the measurement control point base station sends a first resident cell change instruction to the base station to which the potential target cell belongs, wherein the first resident cell change instruction is used for informing the resident cell of the user equipment after the potential target cell is taken as the changed resident cell.

6. The method of claim 4, wherein when the UE needs to change the camped cell, the method further comprises:

and the measurement control point base station sends a second resident cell change instruction to the measurement base station, wherein the second resident cell change instruction is used for informing the resident cell of the user equipment after the potential target cell is taken as the changed resident cell.

7. The method according to any of claims 4 to 6, wherein the measurement control point base station is also a base station to which an anchor cell of the user equipment belongs.

8. The method according to any of claims 4 to 6, wherein the measurement control point base station is not the base station to which the anchor cell of the user equipment belongs.

9. The method of claim 8, wherein when the ue needs to change the camping cell, the method further comprises:

and the measurement control point base station sends a third resident cell change instruction to the base station to which the anchor cell of the user equipment belongs, wherein the third resident cell change instruction is used for informing the resident cell of the user equipment after the potential target cell is taken as the changed resident cell.

10. The method of claim 4, wherein when the UE needs to change the camped cell, the method further comprises:

and the measurement control point base station sends a first message to the user equipment, wherein the first message is used for indicating that the user equipment is changed from a broadcast channel and a paging channel which synchronize or monitor the resident cell to a broadcast channel and a paging channel which synchronize or monitor the potential target cell.

11. The method of claim 4, wherein before the determining whether the UE needs to change the camped cell, the method further comprises:

and the measurement control point base station sends a first message to the user equipment according to the measurement result sent by the base station to which the potential target cell belongs, wherein the first message is used for indicating the user equipment to synchronize or monitor the broadcast channel and the paging channel of the potential target cell on the basis of continuously synchronizing or monitoring the broadcast channel and the paging channel of the resident cell.

12. The method of claim 1, wherein the measurement control point base station is a base station to which an anchor cell of the user equipment belongs, and wherein the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the anchor cell of the user equipment belongs.

13. The method according to claim 12, wherein the measurement control point base station is also a base station to which an original cell camped on the ue belongs, and the original cell camped on the ue is the cell camped on the ue before the determination that the ue needs to change the cell camped on the ue.

14. The method of claim 13, wherein when the ue needs to change the camping cell, the method further comprises:

and the measurement control point base station sends a first message to the user equipment, wherein the first message is used for indicating that the user equipment is changed from a broadcast channel and a paging channel which synchronize or monitor the original resident cell to a broadcast channel and a paging channel which synchronize or monitor the potential target cell.

15. The method of claim 13, wherein before the determining whether the ue needs to change the camping cell, the method further comprises:

the measurement control point base station sends a first message to the user equipment according to a measurement result sent by the base station to which the potential target cell belongs, wherein the first message is used for indicating the user equipment to synchronize or monitor the broadcast channel and the paging channel of the potential target cell on the basis of continuously synchronizing or monitoring the broadcast channel and the paging channel of the original resident cell;

when it is determined that the user equipment needs to change the camping cell, the method further includes:

and the measurement control point base station sends a second message to the user equipment, wherein the second message is used for indicating that the user equipment is not synchronized any more or monitoring a broadcast channel and a paging channel of the original resident cell.

16. The method according to claim 12, wherein the measurement control point base station is not a base station to which an original cell camped on the ue belongs, and the original cell camped on the ue is the cell camped on the ue before the determination that the ue needs to change the cell camped on the ue.

17. The method of claim 16, wherein when the ue needs to change the camping cell, the method further comprises:

and the measurement control point base station sends a first resident cell change instruction to the base station to which the original resident cell belongs, wherein the first resident cell change instruction is used for informing the resident cell of the user equipment after the potential target cell is taken as the changed resident cell.

18. The method of claim 17, wherein the first camped cell change indication is further configured to notify the ue to send a first message, and wherein the first message is configured to indicate that the ue changes from synchronizing with or listening to a broadcast channel and a paging channel of the camped cell to synchronizing with or listening to a broadcast channel and a paging channel of the potential target cell.

19. The method of claim 16 or 17, wherein before the determining whether the ue needs to change the camping cell, the method further comprises:

the measurement control point base station sends a first message to the user equipment through the base station to which the resident cell of the user equipment belongs according to the measurement result sent by the base station to which the potential target cell belongs, wherein the first message is used for indicating the user equipment to synchronize or monitor the broadcast channel and the paging channel of the potential target cell on the basis of continuously synchronizing or monitoring the broadcast channel and the paging channel of the resident cell;

and the measurement control point base station sends a second message to the user equipment through the base station to which the potential target cell belongs, wherein the second message is used for indicating that the user equipment is not synchronized any more or monitoring a broadcast channel and a paging channel of the original resident cell.

20. The method according to claim 1, wherein the measurement control point base station is a base station to which a camped cell of the user equipment belongs, and the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the camped cell of the user equipment belongs.

21. The method of claim 20, wherein the potential target cell is located in a different RNA from the camped cell, and wherein after sending the second measurement request, the method further comprises:

the measurement control point base station receives a conflict indication sent by a base station to which the potential target cell belongs, wherein the conflict indication carries an identifier of the user equipment, and the conflict indication is used for indicating that an uplink tracking signal sent by the user equipment is unavailable in an RNA (ribonucleic acid) of the potential target cell;

and after receiving the conflict indication, the measurement control point base station sends a first message to the user equipment, wherein the first message is used for indicating the user equipment to start measurement on a downlink signal of a resident cell of the user equipment, and initiates a radio resource control reconfiguration process according to a measurement result of the downlink signal.

22. The method of claim 21, wherein the measurement control point base station is also a base station to which an anchor cell of the user equipment belongs.

23. The method of claim 21, wherein the measurement control point base station is not a base station to which an anchor cell of the UE belongs.

24. The method of claim 23, wherein the measurement control point base station sends a measurement change instruction to a base station to which an anchor cell of the ue belongs, and wherein the measurement change instruction is used to notify the base station to which the anchor cell of the ue belongs that a measurement mode of the ue is changed to measurement of downlink signals.

25. The method of claim 20, wherein the potential target cell is located in a different RNA from the camped cell, and wherein after sending the second measurement request, the method further comprises:

the measurement control point base station receives a measurement result sent by a base station to which the potential target cell belongs;

26. The method of claim 25, wherein the measurement control point base station is a base station to which an anchor cell of the UE belongs.

27. The method of claim 25, wherein the measurement control point base station is not a base station to which an anchor cell of the UE belongs.

28. The method of claim 27, wherein the measurement control point base station sends a measurement change instruction to a base station to which an anchor cell of the ue belongs, and wherein the measurement change instruction is used to notify the base station to which the anchor cell of the ue belongs that a measurement mode of the ue is changed to measurement of downlink signals.

29. The method according to claim 1, wherein the measurement control point base station is a base station to which an anchor cell of the user equipment belongs, and the measurement control point base station is not a base station to which a camping cell of the user equipment belongs, and the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the anchor cell of the user equipment belongs.

30. The method of claim 29, wherein the potential target cell is located in a different RNA from the camped cell, and wherein after sending the second measurement request, the method further comprises:

and after receiving the conflict indication, the measurement control point base station sends a first message to the user equipment through a base station to which the resident cell of the user equipment belongs, wherein the first message is used for indicating the user equipment to start downlink measurement on the resident cell of the user equipment, and a radio resource control reconfiguration process is initiated according to a downlink measurement result.

31. The method of claim 30, wherein the potential target cell is located in a different RNA from the camped cell, and wherein after sending the second measurement request, the method further comprises:

32. The method according to any of claims 21 to 28, 30 or 31, wherein the first message is further used to instruct the ue to initiate measurement of downlink signals of the camped cell and the potential target cell of the ue, and initiate a radio resource control reconfiguration procedure according to the measurement results of the downlink signals of the camped cell and the potential target cell.

33. A base station, characterized in that the base station acts as a measurement control point base station, the base station comprising a processor and a transceiver, wherein

The base station comprises a transceiver and a plurality of measurement base stations, wherein the transceiver is used for sending a first measurement request to one or more measurement base stations, and the measurement request is used for indicating measurement of an uplink tracking signal of user equipment;

the processor is used for determining a potential target cell of the user equipment according to a measurement result generated by the processor and/or a measurement result returned by the measurement base station, wherein the measurement result is generated based on an uplink tracking signal sent by the user equipment;

the transceiver is further configured to send a second measurement request to the base station to which the potential target cell belongs, where the second measurement request carries measurement control point indication information;

the transceiver is further configured to receive a measurement result sent by a base station to which the potential target cell belongs when the potential target cell and a camping cell of the user equipment are located in the same radio access notification cell RNA, where the measurement result sent by the potential target cell is generated by the base station to which the potential target cell belongs based on an uplink tracking signal sent by the user equipment and received in the potential target cell;

the processor is further configured to determine whether the ue needs to change the camping cell according to a measurement result sent by the base station to which the potential target cell belongs.

34. The bs of claim 33, wherein the first measurement request carries the measurement control point indication information, and wherein the measurement control point indication information is used to indicate that the measurement control point bs is a bs to which an anchor cell of the ue belongs or a bs to which a camping cell of the ue belongs.

35. The base station of claim 34, wherein the measurement control point base station is a base station to which a camping cell of the ue belongs, or a base station to which an anchor cell of the ue belongs.

36. The base station according to claim 35, wherein the measurement control point base station is a base station to which a camped cell of the user equipment belongs, and the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the camped cell of the user equipment belongs.

37. The base station of claim 36, wherein when the processor determines that the UE needs to change the camped cell,

the transceiver is further configured to send a first camped cell change instruction to the base station of the potential target cell, where the first camped cell change instruction is used to notify a camped cell of the user equipment after the potential target cell is used as a changed camped cell.

38. The base station of claim 36, wherein when the processor determines that the UE needs to change the camped cell,

the transceiver is further configured to send a second resident cell change instruction to the measurement base station, where the second resident cell change instruction is used to notify a resident cell of the user equipment after the potential target cell is used as a changed resident cell.

39. The base station according to any of claims 36 to 38, wherein the measurement control point base station is also a base station to which an anchor cell of the user equipment belongs.

40. The base station according to any of claims 36 to 38, wherein the measurement control point base station is not the base station to which the anchor cell of the user equipment belongs.

41. The base station of claim 40, wherein when the processor determines that the UE needs to change the camped cell,

the transceiver is further configured to send a third camped cell change instruction to the base station to which the anchor cell of the user equipment belongs, where the third camped cell change instruction is used to notify the camped cell of the user equipment after the potential target cell is used as the changed camped cell.

42. The base station of claim 36, wherein when the processor determines that the UE needs to change the camped cell,

the transceiver is further configured to send a first message to the ue, where the first message is used to instruct the ue to change from synchronizing or monitoring the broadcast channel and the paging channel of the camping cell to synchronizing or monitoring the broadcast channel and the paging channel of the potential target cell.

43. The base station of claim 36,

the transceiver is further configured to send a first message to the ue according to a measurement result sent by the base station to which the potential target cell belongs before the processor determines whether the ue needs to change the camping cell, where the first message is used to instruct the ue to synchronize or monitor the broadcast channel and the paging channel of the potential target cell on the basis of continuing to synchronize or monitor the broadcast channel and the paging channel of the camping cell.

44. The base station of claim 33, wherein the measurement control point base station is a base station to which an anchor cell of the user equipment belongs, and wherein the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the anchor cell of the user equipment belongs.

45. The base station of claim 44, wherein the measurement control point base station is also a base station to which an original cell of the UE belongs, and the original cell is a cell of the UE before the UE is determined to need to change the cell.

46. The base station of claim 45, wherein when the processor determines that the UE needs to change the camped cell,

the transceiver is further configured to send a first message to the ue, where the first message is used to instruct the ue to change from synchronizing or monitoring the broadcast channel and the paging channel of the original cell to synchronizing or monitoring the broadcast channel and the paging channel of the potential target cell.

47. The base station of claim 45, wherein the processor determines whether the UE needs to change the camped cell before,

the transceiver is further configured to send a first message to the user equipment according to a measurement result sent by a base station to which the potential target cell belongs, where the first message is used to instruct the user equipment to synchronize or monitor a broadcast channel and a paging channel of the potential target cell on the basis of continuing to synchronize or monitor the broadcast channel and the paging channel of the original resident cell;

when the processor determines that the user equipment needs to change the camping cell,

the transceiver is further configured to send a second message to the ue, where the second message is used to indicate that the ue is no longer synchronized or monitors a broadcast channel and a paging channel of the original cell.

48. The base station of claim 44, wherein the measurement control point base station is not a base station to which an original cell camped on the UE belongs, and wherein the original cell camped on the UE is a cell camped on the UE before the determination that the UE needs to change the cell camped on the UE.

49. The base station of claim 48, wherein when the processor determines that the UE needs to change the camped cell,

the transceiver is further configured to send a first camped cell change instruction to the base station to which the original camped cell belongs, where the first camped cell change instruction is used to notify a camped cell of the user equipment after the potential target cell is used as a changed camped cell.

50. The base station of claim 49, wherein the first camped cell change indication is further configured to notify the UE of sending a first message, and wherein the first message is configured to indicate that the UE changes from synchronizing with or listening to a broadcast channel and a paging channel of the camped cell to synchronizing with or listening to a broadcast channel and a paging channel of the potential target cell.

51. The base station of claim 48 or 49, wherein the processor determines whether the UE needs to change the camped cell,

the transceiver is further configured to send, according to a measurement result sent by the base station to which the potential target cell belongs, a first message to the ue through the base station to which the camped cell of the ue belongs, where the first message is used to instruct the ue to synchronize or monitor a broadcast channel and a paging channel of the potential target cell on the basis of continuing to synchronize or monitor the broadcast channel and the paging channel of the camped cell;

the transceiver is further configured to send a second message to the ue through the base station to which the potential target cell belongs, where the second message is used to indicate that the ue is no longer synchronized or monitors the broadcast channel and the paging channel of the original camping cell.

52. The base station according to claim 33, wherein the measurement control point base station is a base station to which a camped cell of the user equipment belongs, and the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the camped cell of the user equipment belongs.

53. The base station of claim 52, wherein the potential target cell is located in a different RNA than the camped cell, and wherein after the sending of the second measurement request,

the transceiver is further configured to receive a collision indication sent by a base station to which the potential target cell belongs, where the collision indication carries an identifier of the user equipment, and the collision indication is used to indicate that an uplink tracking signal sent by the user equipment is not available in an RNA in which the potential target cell is located;

the transceiver is further configured to send a first message to the ue after receiving the collision indication, where the first message is used to instruct the ue to start measurement on a downlink signal of a cell where the ue resides, and initiate a radio resource control reconfiguration procedure according to a measurement result of the downlink signal.

54. The base station of claim 53, wherein the measurement control point base station is also a base station to which an anchor cell of the UE belongs.

55. The base station of claim 53, wherein the measurement control point base station is not a base station to which an anchor cell of the UE belongs.

56. The base station of claim 55,

the transceiver is further configured to send a measurement change instruction to the base station to which the anchor cell of the ue belongs, where the measurement change instruction is used to notify the base station to which the anchor cell of the ue belongs that the measurement mode of the ue is changed to perform measurement on the downlink signal.

57. The base station of claim 52, wherein the potential target cell is located in a different RNA than the camped cell, and wherein after the sending of the second measurement request,

the transceiver is further configured to receive a measurement result sent by a base station to which the potential target cell belongs;

the transceiver is further configured to send a first message to the ue according to a measurement result sent by the base station to which the potential target cell belongs, where the first message is used to instruct the ue to start measurement on a downlink signal of a cell where the ue resides, and initiate a radio resource control reconfiguration procedure according to the measurement result of the downlink signal.

58. The base station of claim 57, wherein the measurement control point base station is a base station to which an anchor cell of the UE belongs.

59. The base station of claim 57, wherein the measurement control point base station is not the base station to which the anchor cell of the UE belongs.

60. The base station of claim 59, wherein the transceiver sends a measurement change indication to the base station to which the anchor cell of the UE belongs, and wherein the measurement change indication is used to notify the base station to which the anchor cell of the UE belongs that the UE's measurement mode is changed to perform downlink signal measurement.

61. The base station of claim 33, wherein the measurement control point base station is a base station to which an anchor cell of the ue belongs, and the measurement control point base station is not a base station to which a camping cell of the ue belongs, and wherein the measurement control point indication information is used to indicate that the measurement control point base station is the base station to which the anchor cell of the ue belongs.

62. The base station of claim 61, wherein the potential target cell is located in a different RNA than the camped cell, and wherein after the sending of the second measurement request,

the transceiver is further configured to send a first message to the ue through the base station to which the cell where the ue resides belongs after receiving the collision indication, where the first message is used to instruct the ue to start downlink measurement on the cell where the ue resides, and initiate a radio resource control reconfiguration procedure according to a downlink measurement result.

63. The base station of claim 61, wherein the potential target cell is located in a different RNA than the camped cell, and wherein after the sending of the second measurement request,

and sending a first message to the user equipment through the base station to which the resident cell of the user equipment belongs according to the measurement result sent by the base station to which the potential target cell belongs, wherein the first message is used for indicating the user equipment to start measuring a downlink signal of the resident cell of the user equipment, and initiating a radio resource control reconfiguration process according to the measurement result of the downlink signal.

64. The base station according to any of claims 53 to 60, wherein the first message is further used to instruct the ue to start measurement on downlink signals of the camped cell and the potential target cell of the ue, and initiate a radio resource control reconfiguration procedure according to the measurement results of the downlink signals of the camped cell and the potential target cell.

65. A mobility management system of a user equipment, comprising a measurement control point base station and one or more measurement base stations, wherein:

the base station comprises a measurement control point base station and a measurement control point base station, wherein the measurement control point base station is used for sending a first measurement request to one or more measurement base stations, and the measurement request is used for indicating to measure an uplink tracking signal of user equipment; determining a potential target cell of the user equipment according to a measurement result generated by the user equipment and/or a measurement result returned by the measurement base station, wherein the measurement result is generated based on an uplink tracking signal sent by the user equipment, and sending a second measurement request to the base station to which the potential target cell belongs, and the second measurement request carries measurement control point indication information; when the potential target cell and the resident cell of the user equipment are located in the same radio access notification area RNA, receiving a measurement result sent by a base station to which the potential target cell belongs, wherein the measurement result sent by the potential target cell is generated by the base station to which the potential target cell belongs based on an uplink tracking signal sent by the user equipment and received in the potential target cell; determining whether the user equipment needs to change the resident cell according to a measurement result sent by the base station to which the potential target cell belongs;