WO2020248283A1 - Wireless communication method and apparatus, and terminal device - Google Patents

Abstract

The present application provides a wireless communication method and apparatus and a terminal device. The method comprises: a terminal device selecting, from at least one cell, a first cell to be accessed; if the terminal device can use a CHO access technique to access the first cell, the terminal device then trying to perform a CHO execution procedure; and if the terminal device cannot use the CHO access technique to access the first cell, the terminal device then using the first cell to perform RRC connection re-establishment. In the method provided in embodiments of the application, the terminal device performs the RRC connection re-establishment using the first cell which was selected prior to the RRC connection re-establishment, thereby avoiding the time delay caused by an additional cell selection procedure, and accelerating the RRC connection re-establishment so as to reduce data interruption time.

Description

Wireless communication method, device and terminal equipment Technical field

The embodiments of the present application relate to the field of communication, and more specifically, to wireless communication methods, devices, and terminal devices.

Background technique

At present, in order to ensure the communication quality of the terminal equipment (User Equipment), the UE first selects the cell when the radio link fails or the cell handover fails. If the selected cell is not a pre-configured Conditional Handover (CHO) For candidate cells, the UE initiates a radio resource control (Radio Resource Control, RRC) connection re-establishment process.

Summary of the invention

The wireless communication method, device, and terminal equipment provided in the embodiments of the present application can reduce the time for RRC connection re-establishment.

In a first aspect, a wireless communication method is provided, including: a terminal device selects a first cell to be accessed from at least one cell; when the terminal device can access the first cell in a conditional handover CHO access mode In a cell, the terminal device tries the CHO execution process; when the terminal device cannot access the first cell in the CHO access mode, the terminal device uses the first cell to reestablish the RRC connection .

In a second aspect, a wireless communication device is provided, including: a selection module, used to select a first cell to be accessed from at least one cell; an execution module, used when the terminal device can switch CHO access conditions When accessing to the first cell in the CHO access mode, the terminal device tries to perform the CHO process; the reconstruction module is used to use the first cell when the terminal device cannot access the first cell in the CHO access mode. The cell performs RRC connection reestablishment.

In a third aspect, a terminal device is provided, including the device in the second aspect or in each of its implementation manners.

In a fourth aspect, a communication device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above-mentioned first aspect or each of its implementation modes.

In a fifth aspect, a chip is provided, which is used to implement the method in the first aspect or its implementation manners.

Specifically, the chip includes a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the first aspect or its implementation manners.

In a sixth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the method in the first aspect or its implementation manners.

In a seventh aspect, a computer program product is provided, including computer program instructions, which cause a computer to execute the method in the first aspect or its implementation manners.

In an eighth aspect, a computer program is provided, which, when run on a computer, causes the computer to execute the method in the first aspect or its implementation manners.

In the wireless communication method provided in the embodiments of the present application, when the terminal device selects the first cell to be accessed and cannot access the first cell in the CHO access mode, the first cell is used to reestablish the RRC connection, because the terminal device is performing When the RRC connection is re-established, the first cell selected before the RRC connection is re-established is used for the re-establishment, so the delay caused by the selection process of additional cells can be avoided, the RRC connection re-establishment time can be speeded up, and the data interruption can be reduced. time.

Description of the drawings

FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

Figure 2 is a handover flowchart provided by an embodiment of the present application;

FIG. 3 is a flow chart of a handover based on conditional trigger provided by an embodiment of the present application;

Figure 4a is a schematic diagram of an RRC connection re-establishment provided by an embodiment of the present application;

Figure 4b is a schematic diagram of another RRC connection re-establishment provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application;

FIG. 6 is another schematic flowchart of a wireless communication method provided by an embodiment of the present application;

FIG. 7 is another schematic flowchart of a wireless communication method provided by an embodiment of the present application;

FIG. 8 is still another schematic flowchart of a wireless communication method provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a wireless communication device provided by an embodiment of the present application;

FIG. 10 is another schematic structural diagram of a wireless communication device provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a chip provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system or 5G system, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (MTC), and vehicle to vehicle (V2V) communication, etc. The embodiments of this application can also be applied to these communications system.

Optionally, the communication system in the embodiments of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, can also be applied to a dual connectivity (DC) scenario, and can also be applied to a standalone (SA) deployment. Network scene.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.

The communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110. The "terminal equipment" used here includes but is not limited to connection via wired lines, such as via public switched telephone networks (PSTN), digital subscriber lines (Digital Subscriber Line, DSL), digital cables, and direct cable connections ; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device that is set to receive/send communication signals; and/or Internet of Things (IoT) equipment. A terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellites or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio phone transceivers Electronic device. Terminal equipment can refer to access terminals, user equipment (UE), user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminal devices in the future evolution of PLMN, etc.

Optionally, direct terminal connection (Device to Device, D2D) communication may be performed between the terminal devices 120.

Optionally, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Figure 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.

Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.

It should be understood that the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here. The communication device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the application.

It should be understood that the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here. The communication device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the application.

It should be understood that the terms "system" and "network" in this article are often used interchangeably in this article. The term "and/or" in this article is only an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

The following briefly introduces the development of 5G and possible application scenarios.

At present, with people’s pursuit of speed, latency, high-speed mobility, energy efficiency, and the diversity and complexity of business in future life, the 3rd Generation Partnership Project (3GPP) international standards organization has begun research and development. 5G. The main application scenarios of 5G can include: enhanced Mobile Broadband (eMBB), low-latency and high-reliability communication (URLLC), and massive machine type communication (mMTC) . eMBB still aims for users to obtain multimedia content, services and data, and its demand is growing rapidly. On the other hand, because eMBB may be deployed in different scenarios, such as indoors, urban areas, rural areas, etc., its capabilities and requirements are also quite different, so it cannot be generalized and can be analyzed in detail in conjunction with specific deployment scenarios. Typical applications of URLLC can include: industrial automation, power automation, telemedicine operations (surgery), traffic safety protection, etc. Typical characteristics of mMTC can include: high connection density, small data volume, delay-insensitive services, low-cost modules and long service life.

In a 5G system, NR can also be deployed independently. The RRC status in the 5G network environment can include RRC idle (RRC_IDLE) state, RRC connected (RRC_CONNECTED) state, and RRC inactive (RRC_INACTIVE state). Among them, the RRC in the RRC_IDLE state has not established a connection; the RRC in the RRC_CONNECTED state has established a connection. The following briefly introduces the different states of the respective RRC.

-RRC_IDLE: Mobility is UE-based cell selection and reselection, paging is initiated by Core Network (CN), and the paging area is configured by CN. There is no UE Access Stratum (UE AS) context on the base station side. There is no RRC connection.

-RRC_CONNECTED: There is an RRC connection, and there is a UE AS context between the base station and the UE. The network side knows that the location of the UE is of a specific cell level. Mobility is the mobility controlled by the network side. Unicast data can be transmitted between the UE and the base station.

-RRC_INACTIVE: Mobility is based on UE-based cell selection and reselection. There is a core network-new radio (Core Network-New Radio, CN-NR) connection. The UE AS context is stored on a certain base station, and the paging is received by the radio. The radio access network (RAN) triggers, the RAN-based paging area is managed by the RAN, and the network side knows that the location of the UE is based on the RAN paging area level.

Similar to the LTE system, the NR system can support the handover process of the terminal equipment in the connected state. For example, when users who are using network services move from one cell to another, or due to wireless transmission traffic adjustment, activation operation and maintenance, equipment failure, etc., in order to ensure communication continuity and service quality, the system can The communication link between the user and the original cell is transferred to the new cell, that is, the handover process is performed.

Taking the Xn interface switching process as an example, the entire switching process can be divided into three stages. The entire handover process will be described below with reference to FIG. 2.

The first stage, handover preparation (201～205)

In 201, the source base station triggers the terminal device to perform neighboring cell measurement, so that the terminal device can measure the neighboring cell and report the measurement result to the source base station.

In 202, the source base station evaluates the measurement results reported by the terminal device and decides whether to trigger a handover.

In 203, if the source base station decides to trigger a handover, it can send a handover request to the target base station.

In 204, after receiving the handover request sent by the source base station, the target base station can start admission according to the service information carried by the source base station, and perform wireless resource configuration.

In 205, the target base station sends a handover request confirmation message to the source base station, and returns the admission result and wireless resource configuration information in the target base station to the source base station. At this point, the handover preparation phase is complete.

The second stage, switch execution (206～208)

In 206, after the source base station receives the handover request confirmation message of the target base station, the terminal device can be triggered to perform handover.

In 207, the source base station can forward the buffered data, the data packet in transit, the system serial number of the data, etc. to the target base station. And, the target base station can buffer the data received from the source base station

In addition, the terminal device can disconnect from the source base station and establish synchronization with the target base station.

In 208, the terminal device synchronizes to the target base station. At this point, the switching execution phase is complete.

The third stage, the handover is completed (209～212)

In 209, the target base station sends a path switching request to a mobility management function (Access and Mobility Management Function, AMF).

In 210, after receiving the path switching request of the target base station, the AMF performs path switching with the User Plane Function (UPF) to clear the path mark of the user plane of the source base station.

In 211, after the path switching is completed, the AMF may send a path switching confirmation message to the target base station.

In 212, the target base station sends a terminal device context release message to the source base station to notify the source base station that the handover is successful, and trigger the source base station to release the terminal device context. At this point, the switch is complete.

After receiving the handover command, the UE can start the T304 timer, start downlink synchronization to the target cell, obtain the MIB information of the target cell, and then initiate random access. During the random access process, multiple preamble retransmissions can be allowed until the random access is successful. If the T304 timer expires, the handover fails and the UE triggers the RRC connection re-establishment process.

As mentioned above, it is necessary to perform cell handover due to wireless transmission service load adjustment, activation operation and maintenance, equipment failure and other reasons. At present, there are frequent handovers and handovers easy to fail in high-speed mobile scenarios and high-frequency deployment scenarios. Cell handover triggered.

As shown in Figure 3 is a flow chart of cell handover triggered by conditions. The basic principle is that the network equipment pre-configures the UE with CHO candidate cells. The CHO candidate cells can be some cells with handover commands and handover execution conditions. When the configured conditions are evaluated and triggered by the conditions related to the CHO candidate cell, the handover to the CHO candidate cell is executed according to the pre-configured handover command (that is, the random access process is triggered and the handover complete message is sent), so as to avoid entering the network coverage due to high-speed movement In poor areas, it is too late or unable to send measurement reports and receive handover commands.

However, even if the network equipment pre-configures the CHO candidate cell for the UE, the cell handover may fail. If the cell handover triggered by the condition fails, the UE can perform cell selection. If the selected cell is a CHO candidate cell, the UE can try the CHO execution process. If the selected cell is not a CHO candidate cell, the UE can perform the RRC connection reestablishment process.

Similarly, if the radio link fails or the traditional cell handover fails, the UE can perform cell selection. If the selected cell is a CHO candidate cell, the UE can try the CHO execution process. If the selected cell is not a CHO candidate cell, the UE can perform RRC connection reconstruction process.

The following will briefly describe the process of RRC connection re-establishment.

Figure 4a shows a schematic diagram of the RRC connection re-establishment process, and the entire process will be described below in conjunction with Figure 4a.

In 410, the UE sends an RRC Connection Reestablishment Request (RRC Connection Reestablishment Request, RRC-CRR) message to the network device.

In 411, the network device performs security parameter authentication, and if the UE's security parameter authentication information is consistent with that of the network device, the UE authentication is passed. After the UE identity authentication, the network equipment can release the original resources, and after re-admission and resource allocation, according to its instructions, send uplink messages on the allocated uplink resources; the network equipment is on the Common Control Channel (CCCH) Send an RRC Connection Reestablishment (RRC-CR) message to the UE, and the message carries information about the newly allocated resources.

In 412, after the UE receives the RRC-CR message, it can reconfigure radio resources according to the message instructions, activate encryption and integrity protection, and can send an RRC Connection Reestablishment Complete (RRC Connection Reestablishment Complete, RRC-CRC) message to the network equipment.

Figure 4b shows the RRC reestablishment, returning to the schematic diagram of RRC establishment. The whole process will be described below in conjunction with Figure 4b.

In 420, the UE sends an RRC-CRR message to the network device.

In 421, the network device sends an RRC Setup (RRC Setup, RRC-S) message to the UE.

In 422, the UE sends an RRC Setup Complete (RRC Setup Complete, RRC-SC) message to the network device.

In summary, after UE radio link failure or cell handover fails, the UE first performs cell selection. If the selected cell is a CHO candidate cell, the UE tries to perform the CHO process; if the selected cell is not a CHO candidate cell, the UE starts RRC Connection reconstruction process. During the RRC connection re-establishment process, cell selection is still performed, which leads to a prolonged RRC connection re-establishment time.

Among them, the RRC connection re-establishment process will first call the initialization process, and the cell selection process will still be performed during the initialization process, so that it is possible that the selected cell is different from the previously selected cell, and the UE still needs to judge whether it is a CHO candidate cell again; in addition, Cell selection requires a certain amount of time, and performing additional cell selection may prolong the connection reestablishment time, which may increase the RRC connection reestablishment time.

Therefore, the embodiments of the present application provide the following solutions, which can speed up the RRC re-establishment time, thereby reducing the data interruption time.

The solution provided in the implementation of this application will be described in detail below in conjunction with FIG. 5.

As shown in FIG. 5, a schematic flowchart of a wireless communication method 500 according to an embodiment of the present application is shown. The method 500 may include steps 510-530.

510. The terminal device selects a first cell to be accessed from at least one cell.

In the embodiment of the present application, the terminal device selects the first cell to be accessed from at least one cell. The first cell may be a CHO candidate cell pre-configured by the terminal device, or may not be a CHO candidate cell pre-configured by the terminal device.

At least one cell in the implementation of this application may be multiple CHO candidate cells, or multiple non-CHO candidate cells, or some CHO candidate cells and some non-CHO candidate cells, which is not specifically limited in this application.

In the embodiment of this application, when the terminal device selects the first cell to be accessed, the terminal device may select when the radio link fails, or the terminal device may select when the cell handover fails. The application does not make specific restrictions on this. Among them, cell handover failure includes traditional cell handover failure and condition-based cell handover failure.

520. When the terminal device can access the first cell in a CHO access mode, the terminal device tries a CHO execution process.

530. When the terminal device cannot access the first cell in the CHO access mode, the terminal device uses the first cell to perform RRC connection reestablishment.

In the embodiment of this application, if the terminal device can access the first cell in the CHO access mode, the terminal device tries the CHO execution process to access the first cell; if the terminal device cannot access the first cell in the CHO access mode In the case of a cell, the terminal equipment uses the first cell to reestablish the RRC connection. At this time, the terminal equipment accesses the first cell in a connection mode of the RRC connection reestablishment.

In the wireless communication method provided in the embodiments of the present application, when the terminal device selects the first cell to be accessed and cannot access the first cell in the CHO access mode, the first cell is used to reestablish the RRC connection, because the terminal device When the RRC connection is re-established, the first cell selected before the RRC connection is re-established is used for the re-establishment. Therefore, the delay caused by the selection process of additional cells can be avoided, and the RRC connection re-establishment time can be accelerated, thereby reducing Data interruption time.

The CHO candidate cells in the embodiments of this application are some CHO candidate cells that the network equipment configures for the terminal equipment in advance. Each candidate cell of these CHO candidate cells may have a specific handover command and handover execution condition. The first cell to be accessed is a CHO candidate cell, and the terminal device can try to perform the CHO process and access the first cell so that the terminal device can perform data communication.

It should be understood that when the first cell to be accessed selected by the terminal device is a CHO candidate cell, the terminal device may not be able to successfully access the first cell. As mentioned above, the CHO candidate cell configured by the network device to the terminal device has specific handover commands and handover execution conditions. The handover execution conditions can be, for example, cell type, data rate, cell coverage, call reach rate, channel quality, etc. When the first cell selected by the terminal device is a CHO candidate cell, the terminal device can first evaluate whether the current state meets the execution conditions of the CHO candidate cell, and when the terminal device evaluates that the current state can meet the execution conditions of the CHO candidate cell , The CHO execution process can be performed; when the terminal device evaluates that the current state cannot meet the execution conditions of the CHO candidate cell, the terminal device can perform cell selection again. If the selected cell is a CHO candidate cell, the terminal device can evaluate and judge again; if the selected cell is a non-CHO candidate cell, the terminal device can use the selected cell to reestablish the RRC connection.

It should also be understood that the terminal device may also fail to re-establish the RRC connection. In this case, the RRC may be in the RRC_IDLE state and may notify the Non-Access Stratum (NAS) of this RRC The connection re-establishment fails, and the NAS layer decides the subsequent operation.

Of course, in some embodiments, when the terminal device selects the first cell from at least one cell, it can also directly select from the CHO candidate cells. Since the selected first cell is a cell among the CHO candidate cells, The terminal device can access the first cell in the CHO access mode, which can further reduce the time for cell selection.

Optionally, in some embodiments, as shown in FIG. 6, a schematic flowchart of a wireless communication method 600 according to an embodiment of the present application is shown, and the method 600 may include steps 610-640.

610. The terminal device receives configuration information sent by the network device, where the configuration information is used to indicate a CHO candidate cell.

620. The terminal device selects a first cell to be accessed from at least one cell.

630: When the terminal device can access the first cell in a CHO access mode, the terminal device tries a CHO execution process.

640. When the terminal device cannot access the first cell in the CHO access mode, the terminal device uses the first cell to perform RRC connection reestablishment.

In the embodiment of this application, the network device can configure the terminal device with CHO candidate cells in advance, and the configured CHO candidate cell can be indicated to the terminal device in the form of configuration information. After the terminal device receives the configuration information sent by the network device, it can Know the CHO candidate cells configured by the network equipment to facilitate subsequent cell selection.

It should be understood that steps 620-640 in the wireless communication method 600 of the embodiment of the present application may be the same as steps 510-530 in the wireless communication method 500.

As mentioned above, when the terminal device cannot access the selected first cell in the CHO access mode, the first cell will be used to reestablish the RRC connection. The following will introduce the process of the terminal device using the first cell to reestablish the RRC connection.

Optionally, in some embodiments, during the initialization process of the RRC connection re-establishment performed by the terminal device, the terminal device determines the first cell as the target cell to perform the RRC connection re-establishment.

In the embodiment of the present application, during the initialization process of the RRC connection re-establishment of the terminal equipment, the first cell selected by the terminal equipment before the RRC connection re-establishment can be used as the target cell in the RRC connection re-establishment process, and then the target cell is used for RRC. The connection is rebuilt.

In the wireless communication method provided by the embodiments of the present application, when the terminal device performs the RRC connection re-establishment, the cell selected before the RRC connection re-establishment is used as the target cell in the initialization process of the RRC connection re-establishment, so it can avoid the problem of performing additional cells. The delay caused by the selection process can speed up the RRC connection re-establishment time, thereby reducing the data interruption time. In addition, the terminal device selects the cell selected before the RRC connection re-establishment as the target cell in the initialization process of the RRC connection re-establishment, which can avoid the terminal device needing to judge whether the selected cell is a CHO candidate cell again, and can further simplify the behavior of the terminal device.

As an embodiment, in the initialization process of the RRC connection, the terminal device determining the first cell as the target cell includes: the terminal device starts a first timer; and responding to the first When the timer is started, the terminal device determines the first cell as the target cell; in response to the terminal device determining the target cell, the first timer is stopped.

In the embodiment of the present application, the terminal device may start the first timer during the initialization process of the RRC connection reestablishment, and the terminal device, in response to the start of the first timer, determines the first cell as the target cell for the RRC connection reestablishment After the terminal device determines the target cell, the terminal device may stop the first timer in response to the target cell determined by the terminal device.

The first timer in the embodiment of the present application may be timer T311, or may be another timer that can trigger the terminal device to perform cell selection, which is not specifically limited in the present application.

In the embodiment of the present application, in response to the start of the first timer, the first timer is determined as the target cell. It can be understood that when the terminal device starts the first timer, the terminal device can initiate the RRC connection reestablishment process. The first cell previously selected is determined as the target cell for RRC connection re-establishment. Compared with the cell selection performed by the terminal equipment in the RRC connection re-establishment initialization process in the prior art, the RRC connection re-establishment time can be reduced, and the terminal equipment will The first cell is determined as the target cell, which can simplify the behavior of the terminal device.

It should be understood that, in the embodiment of the present application, after the terminal device starts the first timer, the target cell determined by the terminal device during the initialization process of the RRC connection reestablishment is the cell selected by the terminal device before the RRC connection reestablishment initialization process. The terminal device can determine the target cell almost within 0 seconds, which can reduce the RRC connection re-establishment time. After the terminal device determines the target cell, the first timer is then stopped.

In this embodiment of the application, after starting the first timer, the terminal device can suspend all radio bearers (Radio Bearer, RB) except for the Signaling Radio Bearer (Signaling Radio Bearer 0, SRB0); reset the media access Control (Media Access Control, MAC); if the secondary cell (Master Cell Group SCell, MCG SCell) of the primary cell group is configured, the configured MCG SCell(s) can be released; release the current dedicated serving cell (Serving Cell, SC) ) Configuration; if the delay budget reporting configuration is configured (delay Budget Reporting Configuration), you can release the delay budget report configuration, if the timer T342 is running, you can stop the timer T342; if the overheating assistance configuration (overheating assistance configuration) is configured, you can Release the overheating auxiliary configuration. If the timer T345 is running, you can stop the timer T345.

It is understandable that in the above process, if the network device does not configure the terminal device and the timers T342 and T345 are not running, the terminal device may not need to release the configuration involved in the above process, or stop the timer T342. And T345. At this time, for the terminal device, after releasing the current dedicated SC configuration and determining the target cell, the first timer can be stopped.

Optionally, in some embodiments, the terminal device using the first cell to perform RRC connection re-establishment includes: in response to stopping the first timer, the terminal device starts a trigger for triggering an RRC re-establishment request message The second timer.

In the embodiment of the present application, after the terminal device determines the target cell and stops the first timer, the terminal device may start the second timer in response to stopping the first timer, and the second timer can trigger the RRC reestablishment request message.

The second timer in the embodiment of this application may be timer T301, or may be another timer that can trigger the terminal device to perform the RRC re-establishment request message, which is not specifically limited in this application.

Similarly, in the embodiment of the present application, in response to stopping the first timer and starting the second timer, it can be understood that when the terminal device stops the first timer, it starts triggering the terminal device to perform the first RRC connection reestablishment request message. Two timers.

In the embodiment of the present application, after the terminal device starts the second timer, the terminal device may send an RRC connection reestablishment request message to the target cell. The message may carry the reason for the RRC connection reestablishment. For different scenarios, the RRC connection reestablishment request message The reasons for reconstruction may be different. For example, the reason for the rebuild triggered by the failure of the terminal device switch may be "handover failure"; the reason for the rebuild triggered by the wireless link failure may be "other failure"; the reason for the rebuild triggered by the reconfiguration failure It may be "reconfiguration failure". After receiving the RRC connection re-establishment request message sent by the terminal device, the target cell may send an RRC connection re-establishment message to the terminal device, where the RRC connection re-establishment message carries information about newly allocated resources. After receiving the RRC connection re-establishment message sent by the target cell, the terminal device can reallocate radio resources according to the message indication, and activate encryption and integrity protection. The terminal device sends an RRC connection reestablishment complete message to the target cell.

FIG. 7 is a schematic flowchart of a specific implementation manner of the foregoing method. As shown in Figure 7, steps 702-714 may be included.

702: A wireless link failure or a cell handover failure occurs in the terminal device.

704: The terminal device selects the first cell.

706: The terminal device judges whether the selected first cell is a CHO candidate cell.

708: If the first cell selected by the terminal device is a CHO candidate cell, perform CHO handover.

710: The terminal device sends a reconfiguration complete message to the network device.

712: If the first cell selected by the terminal device is not a CHO candidate cell, perform RRC connection reestablishment.

714: During the initialization process of the RRC connection reestablishment, the terminal device selects the first cell as the target cell in the RRC connection reestablishment initialization process, and completes the RRC connection reestablishment.

In the embodiment of the present application, the terminal device may start the first timer during the initialization process of the RRC connection reestablishment, and the terminal device, in response to the start of the first timer, determines the first cell as the target cell in the RRC connection reestablishment initialization process , For the RRC connection reestablishment, after the terminal device determines the target cell, the terminal device may stop the first timer in response to the target cell determined by the terminal device.

In response to stopping the first timer, the terminal device can start the second timer for triggering the RRC reestablishment request message; the terminal device can send the RRC connection reestablishment request message to the target cell; the target cell receives the RRC connection reestablishment sent by the terminal device After the request message, the RRC connection re-establishment message can be sent to the terminal device; after the terminal device receives the RRC connection re-establishment message sent by the target cell, it can reallocate radio resources according to the message instructions to activate encryption and integrity protection; the terminal device sends to the target cell RRC connection re-establishment complete message.

As an embodiment, in the initialization process of the RRC connection, the first timer used to trigger the selection of the target cell is not started.

In the embodiment of the present application, in the initialization process of the RRC connection reestablishment of the terminal device, the first timer used to trigger the selection of the target cell may not be started. In this case, the terminal device may determine the cell selected before the RRC connection re-establishment initialization process as the target cell for the RRC connection re-establishment.

It is understandable that since the first timer is a timer that triggers the terminal device to select a cell, the terminal device may not need to select a cell when the first timer is not started during the initialization process of the RRC connection reestablishment. The cell selected before the RRC connection reestablishment initialization process may be determined as the target cell in the RRC connection reestablishment initialization process.

In the embodiment of the present application, since the terminal device does not start the first timer for triggering the selection of the target cell, the terminal device can determine the cell selected before the RRC connection re-establishment initialization process as the target cell, compared with the prior art , Can reduce the RRC connection re-establishment time, which can reduce the data interruption time.

Optionally, in some embodiments, the terminal device using the first cell to perform RRC connection re-establishment includes: in response to the completion of the release of the current dedicated serving cell configuration configured by the terminal device, the terminal device starts the Trigger the second timer of the RRC connection re-establishment request message, or in response to the completion of the release of the delayed budget report configuration of the terminal device, the terminal device starts the second timer used to trigger the RRC connection re-establishment request message, or in response to Stop the running T342 timer, the terminal device starts the second timer used to trigger the RRC connection re-establishment request message, or in response to the completion of the overheating assistance configuration release of the terminal device, the terminal device starts to trigger the RRC The second timer of the connection re-establishment request message, or in response to stopping the running T345 timer, the terminal device starts the second timer used to trigger the RRC connection re-establishment request message.

In the embodiment of the present application, the second timer may be started according to the relevant configuration performed by the network to the terminal device or whether the relevant timer is running. For example, it may respond to the completion of the release of the current dedicated serving cell configuration of the terminal device, or in response to stopping the running The T342 timer, or in response to the completion of the release of the overheating assistance configuration of the terminal device, or in response to stopping the running T345 timer, starts the second timer.

Optionally, in some embodiments, the terminal device using the first cell to perform RRC connection re-establishment includes:

In the case that the network device does not configure the delay budget report configuration and the overheating assistance configuration to the terminal device, and the T342 timer and the T345 timer are not running, in response to the completion of the release of the current dedicated service cell configuration of the terminal device, The terminal device starts the second timer used to trigger the RRC connection re-establishment request message, or

In the case that the network device has configured the delay budget report configuration to the terminal device and has not configured the overheating assistance configuration, and the T342 timer and the T345 timer are not running, respond to the The delay budget report configuration release of the terminal device is completed, and the terminal device starts the second timer for triggering the RRC connection re-establishment request message, or

In the case that the network device does not configure the overheating assistance configuration to the terminal device, and the T342 timer is running and the T345 timer is not running, in response to stopping the T342 timer, the terminal device Start the second timer used to trigger the RRC connection re-establishment request message, or

In the case where the network device has configured the overheating assistance configuration to the terminal device and the T345 timer is not running, in response to the completion of the release of the overheating assistance configuration of the terminal device, the terminal device starts the Trigger the second timer of the RRC connection re-establishment request message, or

In the case where the T345 timer is running, in response to stopping the T345 timer, the terminal device starts a second timer for triggering the RRC connection re-establishment request message.

In the embodiment of the present application, since the terminal device does not start the first timer, the second timer may be started during the RRC connection re-establishment process. Specifically, if the network device does not configure the delay budget report configuration and the overheating assistance configuration to the terminal device, and the timer T342 and the timer T345 are not running, the terminal device may start the second timer in response to releasing the current dedicated SC configuration.

In the embodiment of the present application, if the network device performs partial related configuration on the terminal device, the second timer can be started according to the configuration performed on the terminal device by the network device. For example, if the network device configures the delay budget report configuration to the terminal device, the overheating assistance configuration is not configured, and the timers T342 and T345 are not running, the terminal device may start the second timer in response to releasing the delay budget report configuration.

If the network device does not configure the overheating assistance configuration to the terminal device, the timer T342 is running and the timer T345 is not running. At this time, the second timer can be started in response to stopping the timer T342. In this process, the network device may pre-configure the delay budget report configuration to the terminal device, or the delay budget report configuration may not be pre-configured, which is not specifically limited in this application.

If the network device configures the overheating auxiliary configuration to the terminal device and the timer T345 is not running, the terminal device can respond to the release of the overheating auxiliary configuration. In this process, the network device may pre-configure the delay budget report configuration to the terminal device, or the delay budget report configuration may not be pre-configured, and the timer T342 may or may not run.

If the timer T345 is running, at this time, the second timer can be started in response to stopping the timer T345. It should be understood that during this process, the timer T342 may or may not be running, and the network device may pre-configure the delay budget report configuration and/or the overheating assistance configuration to the terminal device, or may not pre-configure the delay budget report configuration and/or The overheating auxiliary configuration is not specifically limited in this application.

In this embodiment of the application, after the terminal device starts the second timer, the terminal device sends an RRC connection reestablishment request message to the target cell. The message may carry the reason for the RRC connection reestablishment. For different scenarios, the RRC connection reestablishment request message The reason for the reconstruction may be different. For example, the reason for the rebuild triggered by the failure of the terminal device switch may be "handover failure"; the reason for the rebuild triggered by the wireless link failure may be "other failure"; the reason for the rebuild triggered by the failure of the reconfiguration may be It is "reconfiguration failure". After receiving the RRC connection re-establishment request message sent by the terminal device, the target cell may send an RRC connection re-establishment message to the terminal device, and the RRC connection re-establishment message may carry information about newly allocated resources. After receiving the RRC connection re-establishment message sent by the target cell, the terminal device can reallocate radio resources according to the message indication, and activate encryption and integrity protection. The terminal device sends an RRC connection reestablishment complete message to the target cell.

FIG. 8 is a schematic flowchart of a specific implementation manner of the foregoing method. As shown in Figure 8, steps 802-814 may be included.

802: A wireless link failure or a cell handover failure occurs in the terminal device.

804: The terminal device selects the first cell.

806. The terminal device judges whether the selected first cell is a CHO candidate cell.

808: If the first cell selected by the terminal device is a CHO candidate cell, perform CHO handover.

810: The terminal device sends a reconfiguration complete message to the network device.

812: If the first cell selected by the terminal device is not a CHO candidate cell, perform RRC connection reestablishment.

814: During the initialization process of the RRC connection reestablishment, the terminal device skips cell selection and uses the first cell as the target cell in the RRC connection reestablishment initialization process, and completes the RRC connection reestablishment.

In the embodiment of the present application, in the initialization process of the RRC connection reestablishment of the terminal device, the first timer used to trigger the selection of the target cell may not be started. In this case, the terminal device can skip cell selection and determine the cell selected before the RRC connection re-establishment initialization process as the target cell for the RRC connection re-establishment.

During the initialization process of the RRC connection re-establishment, the terminal device may determine whether to trigger the start of the second timer of the RRC connection re-establishment request message according to whether the related timer configured to the terminal device in advance by the network device is running. Specifically, if the network device does not configure the delay budget report configuration and the overheating assistance configuration to the terminal device, and the timer T342 and the timer T345 are not running, the terminal device can start the second timer in response to releasing the current dedicated SC configuration.

In the embodiment of the present application, if the network device performs partial related configuration on the terminal device, the second timer can be started according to the configuration performed on the terminal device by the network device. For example, if the network device configures the delay budget report configuration to the terminal device, the overheating assistance configuration is not configured, and the timers T342 and T345 are not running, the terminal device may start the second timer in response to releasing the delay budget report configuration.

If the network device does not configure the overheating assistance configuration to the terminal device, the timer T342 is running and the timer T345 is not running. At this time, the second timer can be started in response to stopping the timer T342. In this process, the network device may pre-configure the delay budget report configuration to the terminal device, or the delay budget report configuration may not be pre-configured, which is not specifically limited in this application.

If the network device configures the overheating auxiliary configuration to the terminal device and the timer T345 is not running, the terminal device can respond to the release of the overheating auxiliary configuration. In this process, the network device may pre-configure the delay budget report configuration to the terminal device, or the delay budget report configuration may not be pre-configured, and the timer T342 may or may not run.

If the timer T345 is running, at this time, the second timer can be started in response to stopping the timer T345. It should be understood that during this process, the timer T342 may or may not be running, and the network device may pre-configure the delay budget report configuration and/or the overheating assistance configuration to the terminal device, or may not pre-configure the delay budget report configuration and/or The overheating auxiliary configuration is not specifically limited in this application.

In the wireless communication method provided by the embodiment of the present application, during the initialization process of the terminal device performing the RRC connection reestablishment, the cell selected before the initialization process is selected for the RRC connection reestablishment, which can avoid the additional execution of cell selection during the RRC connection reestablishment initialization process The resulting delay can speed up the RRC connection re-establishment time, thereby reducing the data interruption time. In addition, since the terminal device selects the cell selected before the initialization process for RRC connection re-establishment, it can avoid the terminal device from needing to judge whether the selected cell is a CHO candidate cell again, thereby further simplifying the behavior of the terminal device.

The method embodiments of the present application are described in detail above with reference to Figs. 1 to 8, and the apparatus embodiments of the present application are described below in conjunction with Figs. 9-13. The apparatus embodiments and method embodiments correspond to each other, so the details are not described For part, please refer to the method embodiments of the previous parts.

FIG. 9 is a wireless communication device 900 according to an embodiment of the present application. The wireless communication device 900 may include a selection module 910, an execution module 920, and a reconstruction module 930.

The selection module 910 is configured to select the first cell to be accessed from at least one cell.

The execution module 920, when the terminal device can access the first cell in the CHO access mode, the terminal device tries the CHO execution process.

The re-establishment module 930 is configured to use the first cell to reestablish an RRC connection when the terminal device cannot access the first cell in the CHO access mode.

Optionally, in some embodiments, as shown in FIG. 10 is a wireless communication device 1000 according to an embodiment of the present application. The wireless communication device 1000 may include a receiving module 1010, a selection module 1020, an execution module 1030, and a reconstruction module 1040. .

The receiving module 1010 is configured to receive configuration information sent by a network device, where the configuration information is used to indicate a CHO candidate cell.

The selection module 1020 is configured to select the first cell to be accessed from at least one cell.

The execution module 1030, when the terminal device can access the first cell in the CHO access mode, the terminal device tries the CHO execution process.

The re-establishment module 1040 is configured to perform RRC connection re-establishment using the first cell when the terminal device cannot access the first cell in the CHO access mode.

Among them, the selection module 1020 in the embodiment of the present application may be the same as the selection module 910 in the wireless communication device 900, the execution module 1030 may be the same as the execution module 920 in the wireless communication device 900, and the reconstruction module 1040 may be the same as the selection module 910 in the wireless communication device 900. The reconstruction module 930 is the same.

Optionally, in some embodiments, the reconstruction module 930 or the reconstruction module 1040 is specifically configured to: in the initialization process of the RRC connection reconstruction, the terminal device determines the first cell as a target cell to perform RRC The connection is rebuilt.

Optionally, in some embodiments, the reconstruction module 930 or the reconstruction module 1040 is specifically configured to: start a first timer; in response to the start of the first timer, determine the first cell as the Target cell; in response to determining the target cell, stop the first timer.

Optionally, in some embodiments, the reconstruction module 930 or the reconstruction module 1040 is specifically configured to: in response to stopping the first timer, start a second timer for triggering the RRC reconstruction request message.

Optionally, in some embodiments, the reconstruction module 930 or the reconstruction module 1040 is specifically configured to: in the initialization process of the RRC connection, the first timer used to trigger the target cell selection is not started.

Optionally, in some embodiments, the re-establishment module 930 or the re-establishment module 1040 is specifically configured to: in response to the completion of the release of the current dedicated serving cell configuration of the terminal device, the terminal device starts to trigger an RRC connection re-establishment request The second timer of the message, or in response to the completion of the release of the delayed budget report configuration of the terminal device, the terminal device starts the second timer for triggering the RRC connection re-establishment request message, or in response to stopping the running T342 The terminal device starts the second timer used to trigger the RRC connection re-establishment request message, or in response to the completion of the release of the overheating assistance configuration of the terminal device, the terminal device starts the second timer used to trigger the RRC connection re-establishment request message The second timer, or in response to stopping the running T345 timer, starts the second timer used to trigger the RRC connection re-establishment request message.

Optionally, in some embodiments, the reconstruction module 930 or the reconstruction module 1040 is specifically configured to: when the network device does not configure the terminal device with the delay budget report configuration and the overheating assistance configuration, and the T342 timer and the T345 timing When the device is not running, in response to the completion of the release of the current dedicated serving cell configuration of the terminal device, the second timer for triggering the RRC connection re-establishment request message is started, or the network device has configured the terminal device When the delayed budget report is configured and the overheat assist configuration is not configured, and the T342 timer and the T345 timer are not running, in response to the completion of the release of the delayed budget report configuration of the terminal device, start The second timer used to trigger the RRC connection re-establishment request message, or when the network device does not configure the overheating assistance configuration to the terminal device, and the T342 timer is running and the T345 timer is not running Next, in response to stopping the T342 timer, start the second timer for triggering the RRC connection re-establishment request message, or after the network device has configured the overheating assistance configuration to the terminal device, and the T345 timing When the device is not running, in response to the completion of the release of the overheating assistance configuration of the terminal device, start the second timer for triggering the RRC connection re-establishment request message, or in the case that the T345 timer is running, respond to the stop The T345 timer starts the second timer used to trigger the RRC connection re-establishment request message.

Optionally, in some embodiments, the reconstruction module 930 or the reconstruction module 1040 is specifically configured to: send an RRC reconstruction request message to the target cell; receive an RRC reconstruction message sent by the target cell; send an RRC reconstruction message to the target cell RRC reconstruction complete message.

Optionally, in some embodiments, the selection module 910 is specifically configured to select the to-be-accessed cell from the at least one cell when the radio link of the terminal device fails or when the cell handover fails. The first cell.

An embodiment of the present application also provides a terminal device 1100, as shown in FIG. 11, including a wireless communication device 1110.

The wireless communication device 1110 may be any one of the above-mentioned wireless communication devices 900 or 1000.

An embodiment of the present application also provides a communication device 1200, as shown in FIG. 12, including a processor 1210 and a memory 1220, the memory is used to store a computer program, the processor is used to call and run the computer stored in the memory The program executes the method according to any one of claims 1 to 10.

The processor 1210 may call and run a computer program from the memory 1220 to implement the method in the embodiment of the present application.

The memory 1220 may be a separate device independent of the processor 1210, or it may be integrated in the processor 1210.

Optionally, as shown in FIG. 12, the communication device 1200 may further include a transceiver 1230, and the processor 1210 may control the transceiver 1230 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

Among them, the transceiver 1230 may include a transmitter and a receiver. The transceiver 1230 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 1200 may specifically be a mobile terminal/terminal device of an embodiment of the present application, and the communication device 1200 may implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For simplicity , I won’t repeat it here.

FIG. 13 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1300 shown in FIG. 13 includes a processor 1310, and the processor 1310 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 13, the chip 1300 may further include a memory 1320. The processor 1310 may call and run a computer program from the memory 1320 to implement the method in the embodiment of the present application.

The memory 1320 may be a separate device independent of the processor 1310, or it may be integrated in the processor 1310.

Optionally, the chip 1300 may further include an input interface 1330. The processor 1310 can control the input interface 1330 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 1300 may further include an output interface 1340. The processor 1310 can control the output interface 1340 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. For brevity, here is No longer.

It should be understood that the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip, etc.

It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that the foregoing memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.

The embodiment of the present application also provides a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application , For the sake of brevity, I will not repeat it here.

The embodiments of the present application also provide a computer program product, including computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Repeat it again.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, For brevity, I won't repeat them here.

The embodiment of the present application also provides a computer program.

Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here.

Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application. When the computer program runs on the computer, the computer executes each method in the embodiment of the present application. For the sake of brevity, the corresponding process will not be repeated here.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims (12)

1. A wireless communication method, characterized in that it comprises:

   The terminal device selects the first cell to be accessed from at least one cell;

   When the terminal device can access the first cell in a conditional handover CHO access mode, the terminal device tries the CHO execution process;

   When the terminal device cannot access the first cell in the CHO access mode, the terminal device uses the first cell to perform radio resource control RRC connection reestablishment.
2. The method of claim 1, wherein the method further comprises:

   The terminal device receives configuration information sent by the network device, where the configuration information is used to indicate a CHO candidate cell.
3. The method according to claim 1 or 2, wherein the terminal device uses the first cell to perform RRC connection re-establishment, comprising:

   In the initialization process of the RRC connection re-establishment, the terminal device determines the first cell as a target cell to perform RRC connection re-establishment.
4. The method according to claim 3, wherein the determining, by the terminal device, the first cell as a target cell during the initialization process of the RRC connection reestablishment comprises:

   The terminal device starts a first timer;

   In response to the start of the first timer, the terminal device determines the first cell as the target cell;

   In response to the terminal device determining the target cell, stop the first timer.
5. The method according to claim 4, wherein the terminal device uses the first cell to perform RRC connection re-establishment, comprising:

   In response to stopping the first timer, the terminal device starts a second timer for triggering an RRC re-establishment request message.
6. The method according to claim 3, wherein, during the initialization process of the RRC connection, the first timer used to trigger the selection of the target cell is not started.
7. The method according to claim 6, wherein the terminal device uses the first cell to perform RRC connection re-establishment, comprising:

   In response to the completion of the release of the current dedicated serving cell configuration of the terminal device, the terminal device starts the second timer for triggering the RRC connection re-establishment request message, or

   In response to the completion of the release of the delayed budget report configuration of the terminal device, the terminal device starts the second timer for triggering the RRC connection re-establishment request message, or

   In response to stopping the running T342 timer, the terminal device starts the second timer for triggering the RRC connection re-establishment request message, or

   In response to the completion of the release of the overheating assistance configuration of the terminal device, the terminal device starts a second timer for triggering the RRC connection re-establishment request message, or

   In response to stopping the running T345 timer, the terminal device starts a second timer for triggering the RRC connection re-establishment request message.
8. The method according to claim 6 or 7, wherein the terminal device uses the first cell to perform RRC connection re-establishment, comprising:

   In the case that the network device does not configure the delay budget report configuration and the overheating assistance configuration to the terminal device, and the T342 timer and the T345 timer are not running, in response to the completion of the release of the current dedicated service cell configuration of the terminal device, The terminal device starts the second timer used to trigger the RRC connection re-establishment request message, or

   In the case that the network device has configured the delay budget report configuration to the terminal device and has not configured the overheating assistance configuration, and the T342 timer and the T345 timer are not running, respond to the The delay budget report configuration release of the terminal device is completed, and the terminal device starts the second timer for triggering the RRC connection re-establishment request message, or

   In the case that the network device does not configure the overheating assistance configuration to the terminal device, and the T342 timer is running and the T345 timer is not running, in response to stopping the T342 timer, the terminal device Start the second timer used to trigger the RRC connection re-establishment request message, or

   In the case where the network device has configured the overheating assistance configuration to the terminal device and the T345 timer is not running, in response to the completion of the release of the overheating assistance configuration of the terminal device, the terminal device starts the Trigger the second timer of the RRC connection re-establishment request message, or

   In the case where the T345 timer is running, in response to stopping the T345 timer, the terminal device starts a second timer for triggering the RRC connection re-establishment request message.
9. The method according to any one of claims 1 to 8, wherein the terminal device uses the first cell to perform RRC connection re-establishment, comprising:

   Sending, by the terminal device, an RRC reestablishment request message to the target cell;

   Receiving, by the terminal device, an RRC reestablishment message sent by the target cell;

   The terminal device sends an RRC reconstruction complete message to the target cell.
10. The method according to any one of claims 1 to 9, wherein the terminal device selecting the first cell to be accessed from at least one cell comprises:

    When the wireless link of the terminal device fails, or when the cell handover fails, the terminal device selects the first cell to be accessed from the at least one cell.
11. A communication device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any one of claims 1 to 10 The method described in one item.
12. A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method according to any one of claims 1 to 10.

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