CN117751623A

CN117751623A - Wireless communication method and wireless communication device

Info

Publication number: CN117751623A
Application number: CN202180101149.7A
Authority: CN
Inventors: 王玲萍; 戴振华; 徐恒书; 张亮亮
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2024-03-22
Also published as: WO2023050181A1

Abstract

The application provides a wireless communication method and a wireless communication device, wherein the method comprises the following steps: receiving a first RRC reconfiguration message from a network device to which the source cell belongs, the first RRC reconfiguration message including a DAPS handover command, the DAPS handover command indicating a handover from the source cell to the target cell, the DAPS handover command including a first configuration for use at the target cell; when the sum of the first configuration and the second configuration exceeds the wireless access capability, communicating with the network equipment to which the source cell belongs through the third configuration, or releasing the second configuration; the second configuration is a configuration used in the source cell before the handover, and the sum of the third configuration and the first configuration does not exceed the radio access capability; and after the target cell is successfully accessed through the first configuration, an RRC reconfiguration completion message is sent to the network equipment to which the target cell belongs. According to the method and the device, service interruption caused by the fact that the sum of the configuration of the source cell and the configuration of the target cell exceeds the wireless access capability can be avoided.

Description

Wireless communication method and wireless communication device

Technical Field

The present application relates to the field of wireless communication, and more particularly, to a wireless communication method and a wireless communication apparatus.

Background

During a dual active protocol stack handoff (dual active protocol stack handover, DAPS HO), the terminal device has data transmissions with both the source network device (or source cell) and the target network device (or target cell) for a period of time. The terminal equipment and the source network equipment perform data transmission based on the configuration of the source cell, and the terminal equipment and the target network equipment perform data transmission based on the configuration of the target cell. Wherein the configuration of the target cell is carried in a radio resource control (radio resource control, RRC) reconfiguration message sent by the source network device to the terminal device.

However, if the terminal device works based on both the configuration of the source cell and the configuration of the target cell, the radio access capability of the terminal device may be exceeded, thereby triggering RRC reestablishment, resulting in service interruption of the terminal device.

Disclosure of Invention

The application provides a wireless communication method, which is used for avoiding service interruption caused by the fact that the sum of the configuration of a source cell and the configuration of a target cell exceeds the wireless access capability of terminal equipment.

In a first aspect, a wireless communication method is provided, which may include: receiving a first radio resource control (radio resource control, RRC) reconfiguration message from a network device to which a source cell belongs, the first RRC reconfiguration message including a dual active protocol stack (dual active protocol stack, DAPS) handover command for indicating a handover from the source cell to a target cell, the DAPS handover command including a first configuration for use at the target cell, the first configuration not exceeding radio access capabilities; when the sum of the first configuration and the second configuration exceeds the wireless access capability, communicating with the network equipment to which the source cell belongs through a third configuration, or releasing the second configuration; the second configuration is a configuration used at the source cell prior to handover, and the sum of the third configuration and the first configuration does not exceed the radio access capability; and after the target cell is successfully accessed through the first configuration, sending an RRC reconfiguration complete message to the network equipment to which the target cell belongs. Wherein, the wireless access capability refers to the wireless access capability of the terminal equipment.

Based on the above technical solution, after receiving the DAPS handover command included in the first RRC reconfiguration message, if it is determined that the sum of the configuration of the source cell (i.e., the second configuration) and the configuration of the target cell (i.e., the first configuration) exceeds the radio access capability of the terminal device, in the process of switching the terminal device from the source cell to the target cell, the terminal device reduces the configuration of the source cell, so that the sum of the configuration of the source cell (i.e., the third configuration) and the configuration of the target cell after the reduction does not exceed the radio access capability of the terminal device, thereby enabling the terminal device to continue to perform DAPS handover instead of initiating RRC reestablishment, which is beneficial to ensuring continuity of services.

Or after receiving the DAPS switching command included in the first RRC reconfiguration message, if it is determined that the sum of the configuration of the source cell (i.e., the second configuration) and the configuration of the target cell (i.e., the first configuration) exceeds the radio access capability of the terminal device, after the terminal device releases the configuration of the source cell, the terminal device switches from the source cell to the target cell according to the configuration of the target cell, so that service interruption caused by the terminal device initiating RRC reestablishment is avoided, and service continuity is facilitated to be ensured.

The sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device, which means that the sum of the configurations related to the radio access capability of the terminal device in the first configuration and the second configuration exceeds the radio access capability of the terminal device. For example, the first configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the target cell, and the second configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the source cell. The sum of the first configuration and the second configuration exceeding the radio access capability of the terminal device may mean that the sum of the number of uplink radio frequency transmission channels used by the terminal device in the target cell and the number of uplink radio frequency transmission channels used by the terminal device in the source cell exceeds the radio access capability of the terminal device (i.e., the maximum supported number of uplink radio frequency transmission channels).

Similarly, the sum of the first configuration and the third configuration does not exceed the radio access capability of the terminal device, which means that the sum of the configurations related to the radio access capability of the terminal device in the first configuration and the third configuration does not exceed the radio access capability of the terminal device. For example, the first configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the target cell, and the third configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the source cell. The sum of the first configuration and the third configuration not exceeding the radio access capability of the terminal device may mean that the sum of the number of uplink radio frequency transmission channels used by the terminal device in the target cell and the number of uplink radio frequency transmission channels used by the terminal device in the source cell does not exceed the radio access capability of the terminal device (i.e. the maximum supported number of uplink radio frequency transmission channels).

Illustratively, the first configuration includes one or more of: the number of uplink radio frequency transmission channels, the number of downlink radio frequency reception channels, the number of sounding reference signal (sounding reference signal, SRS) resources, the number of ports of SRS resources, the number of channel state information reference signal (channel state information reference signal, CSI-RS) resources, and the number of ports of CSI-RS resources.

The second configuration includes one or more of the following: the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of SRS resources, the number of ports of the SRS resources, the number of CSI-RS resources and the number of ports of the CSI-RS resources.

The third configuration includes one or more of the following: the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of SRS resources, the number of ports of the SRS resources, the number of CSI-RS resources and the number of ports of the CSI-RS resources.

With reference to the first aspect, in some implementations of the first aspect, if the third configuration is used to communicate with a network device to which the source cell belongs, the method further includes: a second RRC reconfiguration message is received, the second RRC reconfiguration message being for indicating release of the third configuration.

Wherein the second RRC reconfiguration message is sent by the network device to which the target cell belongs to the terminal device.

With reference to the first aspect, in certain implementation manners of the first aspect, when the sum of the first configuration and the second configuration exceeds the radio access capability, communicating with a network device to which the source cell belongs through a third configuration, or releasing the second configuration includes: and when the sum of the first configuration and the second configuration exceeds the wireless access capability and the first configuration is lower than the wireless access capability, communicating with the network equipment of the source cell through the third configuration.

In a second aspect, a wireless communication apparatus is provided, which may be a terminal device, or a component in a terminal device. The wireless communications apparatus can include various modules or units for performing the method of the first aspect and any one of the possible implementations of the first aspect.

In a third aspect, a wireless communications apparatus is provided that includes a processor. The processor is coupled to the memory and operable to execute instructions in the memory to implement the method of the first aspect and any one of the possible implementations of the first aspect. Optionally, the wireless communication device further comprises a memory. Optionally, the wireless communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, the wireless communication apparatus is a terminal device. When the wireless communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the wireless communication device is a chip configured in a terminal device. When the wireless communication device is a chip configured in a terminal apparatus, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a fourth aspect, a wireless communication device is provided that includes a processing circuit and an interface circuit. The interface circuit is configured to couple with a memory external to the wireless communication device and provide a communication interface for the processing circuit to access the memory; the processing circuitry is configured to execute program instructions in the memory to implement the method of the first aspect and any one of the possible implementations of the first aspect.

In a fifth aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the method of any one of the possible implementations of the first aspect.

In a specific implementation process, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiments of the present application do not limit the specific implementation manner of the processor and the various circuits.

In a sixth aspect, a processing device is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and is configured to receive signals via the receiver and to transmit signals via the transmitter to perform the method of any one of the possible implementations of the first aspect.

Optionally, the processor is one or more, and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

In a specific implementation process, the memory may be a non-transient (non-transitory) memory, for example, a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It should be appreciated that the related data interaction process, for example, transmitting the indication information, may be a process of outputting the indication information from the processor, and the receiving the capability information may be a process of receiving the input capability information by the processor. Specifically, the data output by the processor may be output to the transmitter, and the input data received by the processor may be from the receiver. Wherein the transmitter and receiver may be collectively referred to as a transceiver.

The processing means in the sixth aspect described above may be one or more chips. The processor in the processing device may be implemented by hardware or may be implemented by software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, implemented by reading software code stored in a memory, which may be integrated in the processor, or may reside outside the processor, and exist separately.

In a seventh aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when executed, causes a computer to perform the method of any one of the possible implementations of the first aspect.

In an eighth aspect, a computer readable storage medium is provided, storing a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the method of any one of the possible implementations of the first aspect described above to be performed.

Drawings

Fig. 1 is a schematic diagram of a communication system suitable for use in a method of wireless communication provided by an embodiment of the present application;

fig. 2 shows a schematic flow chart of a wireless communication method provided in an embodiment of the present application;

fig. 3 shows a schematic flow chart of a wireless communication method provided in an embodiment of the present application;

fig. 4 shows a schematic diagram of a wireless communication device provided in an embodiment of the present application;

fig. 5 shows a schematic block diagram of a wireless communication device provided in another embodiment of the present application;

fig. 6 shows a schematic diagram of a chip system according to an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiments of the present application may be applied to various communication systems, for example, a long term evolution (long term evolution, LTE) system, a frequency division duplex (frequency division duplex, FDD) system, a time division duplex (time division duplex, TDD), a universal mobile telecommunication system (universal mobile telecommunication system, UMTS), a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, a fifth generation (5th generation,5G) communication system or a new radio access technology (new radio access technology, NR), a vehicle-to-other device (vehicle-to-X V X), wherein V2X may include a vehicle-to-internet (vehicle to network, V2N), a vehicle-to-vehicle (vehicle to vehicle, V2V), a vehicle-to-infrastructure (vehicle to infrastructure, V2I), a vehicle-to-pedestrian (vehicle to pedestrian, V2P) and the like, a workshop communication long term evolution technology (long term evolution-vehicle, LTE-V), a vehicle networking, machine type communication (machine type communication, MTC), an internet of things (Internet of things), an inter-machine communication long term evolution technology (long term evolution-machine, LTE-M), a machine-to machine (machine to machine, M2M), and the like.

In this embodiment of the present application, the network device may be any device having a wireless transceiver function. The apparatus includes, but is not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (home evolved Node B, for example, or a home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a WiFi system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception, TRP), etc., may also be 5G, such as a gNB in an NR system, or a transmission point (TRP or TP), one or a group of base stations (including multiple antenna panels) antenna panels in a 5G system, or may also be network nodes constituting a gNB or transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include an active antenna unit (active antenna unit, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB, e.g. the CU is responsible for handling non-real time protocols and services, implementing radio resource control (radio resource control, RRC), traffic data adaptation protocol stack (service data adaptation protocol, SDAP) protocol layer, packet data convergence layer protocol (packet data convergence protocol, PDCP) layer. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), medium access control (medium access control, MAC) and Physical (PHY) layers. The AAU realizes part of physical layer processing functions, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may eventually become information of the PHY layer or be converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

The functionality of a CU entity may be implemented by one or more entities. For example, the functions of the CU entity may be further split, e.g. the functions of the Control Plane (CP) and the functions of the User Plane (UP) may be separated, i.e. the CU entity includes a control plane (CU-CP) entity and a CU user plane (CU-UP) entity of the CU, which may be coupled to the DU entity, together completing the functions of the network device. In one possible way, the CU-CP entity is responsible for the control plane functions, mainly comprising RRC protocol layer and PDCP control plane (PDCP control plane, PDCP-C) protocol layer. The PDCP-C protocol layer is mainly responsible for encryption and decryption of control plane data, integrity protection, data transmission and the like. The CU-UP entity is responsible for the user plane functions, mainly comprising an SDAP protocol layer and a PDCP user plane (PDCP-U) protocol layer. The SDAP protocol layer is mainly responsible for mapping the data flow (flow) of the core network to the bearer. The PDCP-U protocol layer is mainly responsible for encryption and decryption of a data surface, integrity protection, header compression, sequence number maintenance, data transmission and the like.

The network device serves the cell and the terminal device communicates with the cell via transmission resources (e.g., frequency domain resources, or spectrum resources) allocated by the network device. The cell may belong to a macro base station (e.g., macro eNB or macro gNB, etc.), or may belong to a base station corresponding to a small cell (small cell), where the small cell may include: urban cells (metro cells), micro cells (micro cells), pico cells (pico cells), femto cells (femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

In an embodiment of the present application, the terminal device includes a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile terminal, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiments of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in an industrial control (industrial control), a wireless terminal in an unmanned (self-driving) system, a wireless terminal in a remote medical (remote medium), a wireless terminal in a smart grid (smart grid), a wireless terminal in a transportation security (transportation safety), a wireless terminal in a smart city (smart city), a wireless terminal in a smart home (smart home), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in a 5G network or a land-based communication device in an evolved PLMN (public land mobile network), a public network, etc.

The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wearing and developing wearable devices by applying a wearable technology, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

Furthermore, the terminal device may also be a terminal device in an internet of things (Internet of things, ioT) system. IoT is an important component of future information technology development. The intelligent network is mainly technically characterized in that the objects are connected with the network through a communication technology, so that man-machine interconnection and object interconnection intelligent network are realized.

The specific form of the terminal device is not limited in the present application.

To facilitate an understanding of the embodiments of the present application, a communication system suitable for use in the embodiments of the present application will be described in detail with reference to fig. 1. Fig. 1 shows a schematic diagram of a communication system suitable for use in the wireless communication method and wireless communication apparatus of the embodiments of the present application. As shown in fig. 1, communication system 100 may include at least two network devices, such as network device 110 and network device 120 shown in fig. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 130 shown in fig. 1. Wherein the terminal device 130 may be mobile or stationary. Both network device 110 and network device 120 are devices that may communicate with terminal device 130, such as base stations or base station controllers, via wireless links. Each network device may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area (cell).

Fig. 1 illustrates two network devices and one terminal device by way of example, and the communication system 100 may alternatively include at least one network device and may include other numbers of terminal devices within the coverage area of each network device, which is not limited in this embodiment of the present application.

Each of the above-described communication devices, such as the network device 110, the network device 120, or the terminal device 130 in fig. 1, may be configured with a plurality of antennas. The plurality of antennas may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. In addition, each communication device may additionally include a transmitter chain and a receiver chain, each of which may include a plurality of components (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.) associated with the transmission and reception of signals, as will be appreciated by one skilled in the art. Thus, communication between the network device and the terminal device may be via multiple antenna technology.

Optionally, the wireless communication system 100 may further include a network controller, a mobility management entity, and other network entities, which embodiments of the present application are not limited thereto.

To facilitate an understanding of the embodiments of the present application, the terms referred to in this application are first briefly described.

1. RRC reestablishment: when the terminal device has a handover failure, a reconfiguration failure, an integrity detection failure, a radio link failure (radio link failure, RLF), etc., the terminal device may initiate an RRC reestablishment procedure.

For example, the RRC reestablishment procedure may include the following steps:

And step 1, the terminal equipment sends an RRC reestablishment request message to the reestablishment cell (or network equipment to which the reestablishment cell belongs).

And step 2, reestablishing a request of the cell permission terminal equipment, and sending an RRC reestablishment message to the terminal equipment.

And 3, the terminal equipment sends an RRC reestablishment completion message to the reestablishment cell.

The re-established cell here may be a cell determined by the terminal device via cell search or detection. The re-establishment cell may be a cell that meets a predetermined criterion. As in NR protocol technical specification (technical specification, TS) 38.304-f 30. For brevity, detailed descriptions and limitations are not provided herein.

2. And (3) switching: in a wireless communication system, when a terminal device moves/approaches from one cell to another, a handover is required in order to ensure that communication of the terminal device is not interrupted. In the embodiment of the application, the source cell represents a cell for providing service for the terminal equipment before switching, and the target cell represents a cell for providing service for the terminal equipment after switching. The relevant information of the target cell (such as physical cell identity (physical cell identifier, PCI) of the target cell, frequency information, random access resource information required for handover to the target cell, etc.) may be indicated by an RRC reconfiguration message sent by the network device to which the source cell belongs (i.e., the source network device) to the terminal device.

The handoff may be an intra-station handoff or an inter-station handoff. Intra-station handover may refer to a source cell and a target cell belonging to the same network device (e.g., a base station), where the source cell and the target cell may be the same cell or different cells; inter-station handover refers to a situation where the source cell and the target cell belong to different network devices (e.g., base stations). The present application is not limited in this regard.

It should be understood that a cell is a coverage area of a network device, a source cell corresponds to a source network device (e.g., a source base station), and a target cell corresponds to a target network device (e.g., a target base station).

3. Dual active protocol stack handover (dual active protocol stack handover, DAPS HO): in order to ensure zero interruption in the switching process of terminal equipment, DAPS switching is introduced in the communication industry standard.

In the conventional handover process, after receiving a DAPS handover command of a source network device, a terminal device disconnects from a source cell and accesses to a target cell. Unlike the conventional handoff, in the DAPS handoff process, after receiving the DAPS handoff command sent by the source network device, the terminal device accesses to the target cell, and at the same time, the terminal device maintains communication with the source cell link until the target network device notifies the terminal device to completely release the source cell configuration, and the terminal device stops communication with the source cell and releases the communication link with the source cell. The DAPS switching command is carried in an RRC reconfiguration message sent by the source network device to the terminal device.

The handoff procedure of the DAPS is similar to the conventional handoff procedure in that the source network device determines to perform handoff and then the source network device sends a handoff request to the target network device. Further, the target network device replies a handover confirm message to the source network device, indicating to accept handover of the terminal device to the target cell. Further, the source network device sends a DAPS handoff command to the terminal device, instructing the terminal device to handoff to the target cell. The terminal device then simultaneously maintains the connection of the source cell and the target cell. After the terminal equipment is successfully accessed to the target cell and establishes a new connection with the core network, the core network switches the converted downlink data stream to the target network equipment, and simultaneously issues an end marker (end marker) data packet to the source network equipment. The source network device then forwards the data to the target network device. After the target network device receives the end marker message, the target network device can inform the terminal device to release the source cell connection, thereby completing the DAPS switching process.

In the DAPS switching process, after the terminal equipment is successfully accessed to the target network equipment, the terminal equipment stops sending new uplink data to the source network equipment. After the terminal device successfully releases the connection with the source cell, the terminal device stops all communication with the source network device. When the terminal equipment is successfully accessed to the target network equipment, the source network equipment receives a switching success indication message sent by the target network equipment, and therefore the source network equipment stops sending new downlink data to the terminal equipment. Before the terminal equipment successfully releases the connection with the source cell, the source network equipment does not send new downlink data to the terminal equipment, but sends retransmitted downlink data.

As described above, during a DAPS handoff, the terminal device has data transmissions with both the source network device (or source cell) and the target network device (or target cell) for a period of time. The terminal device and the source network device perform data transmission based on the configuration of the source cell (i.e., the second configuration in the following embodiment), and the terminal device and the target network device perform data transmission based on the configuration of the target cell (i.e., the first configuration in the following embodiment). The configuration of the target cell is carried in an RRC reconfiguration message sent by the source network device to the terminal device.

However, if the terminal device works based on both the configuration of the source cell and the configuration of the target cell, the radio access capability of the UE may be exceeded, thereby triggering RRC reestablishment, resulting in service interruption of the terminal device.

In view of this, the present application provides a wireless communication method in order to avoid service interruption caused by the sum of the configuration of the source cell and the configuration of the target cell exceeding the radio access capability of the UE.

The method provided by the embodiment of the application is described in detail below with reference to the accompanying drawings.

It should be understood that the following details of the method provided in the embodiments of the present application are given only for easy understanding and explanation, taking the interaction between the terminal device and the network device as an example. This should not be construed as limiting the subject matter of the methods provided herein. For example, the terminal device shown in the following embodiments may be replaced with a component (such as a chip or a circuit) or the like configured in the terminal device. The network device shown in the following embodiments may also be replaced with a component (such as a chip or a circuit) or the like configured in the network device.

The embodiments shown below are not particularly limited to the specific structure of the execution body of the method provided in the embodiments of the present application, as long as communication can be performed in the method provided in accordance with the embodiments of the present application by running a program in which codes of the method provided in the embodiments of the present application are recorded. For example, the execution body of the method provided in the embodiment of the present application may be a terminal device or a network device, or may be a functional module in the terminal device or the network device that can call a program and execute the program.

Fig. 2 is a schematic flow chart of a method 200 provided by an embodiment of the present application, shown from the perspective of device interaction. As shown in fig. 2, the method 200 may include S210 to S240, and the respective steps are described in detail below.

S210, the network device #1 transmits a first RRC reconfiguration message. Accordingly, in S210, the terminal device receives a first RRC reconfiguration message.

Wherein network device #1 is the network device to which the source cell belongs. The first RRC reconfiguration message includes a DAPS handoff command that instructs the terminal device to handoff from the source cell to the target cell. Illustratively, the DAPS handoff command is a "DAPS-Config-r16" cell carried by a first RRC reconfiguration (RRC reconfiguration) message.

The DAPS switching command comprises first configuration information, wherein the first configuration information is used for indicating the first configuration. The first configuration is a configuration used by the terminal device in the target cell, or the first configuration is a configuration used by the terminal device to communicate in the target cell, or the first configuration is a configuration used by the network device #2 to provide for the terminal device to communicate in the target cell. Wherein the network device #2 is a network device to which the target cell belongs, and the first configuration information is received from the network device #2 by the network device # 1. It will be appreciated that the first configuration does not exceed the radio access capabilities of the terminal device.

The first configuration information includes one or more of: information of the target cell (e.g., PCI of the target cell, frequency information corresponding to the target cell, cell radio network temporary identifier (cell-radio network temporary identifier, C-RNTI) provided by the network device #2 for the terminal device), random access channel (random access channel, RACH) resource information (e.g., dedicated RACH resource and/or common RACH resource) required for accessing the target cell.

Of course, the first configuration information may further include more parameters, which is not limited in this embodiment of the present application.

S220, the terminal device communicates with the network device #1 through the third configuration.

Specifically, in S220, when the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device, the terminal device communicates with the network device #1 through the third configuration. Wherein the sum of the first configuration and the third configuration does not exceed the radio access capability of the terminal device.

In S220, the terminal device communicates with the network device #1 through the third configuration before the terminal device does not receive the message from the network device #2 to release the source cell during the handover of the terminal device from the source cell to the target cell. The terminal device communicates with the network device #1 through the third configuration, and communicates with the network device #2 through the first configuration after the terminal device successfully accesses the target cell. That is, after the terminal device successfully accesses the target cell, and before the terminal device does not receive the message for releasing the source cell, the terminal device has data transceiving in both the source cell and the target cell, wherein the data transceiving is non-signaling interaction between the terminal device and the network device #1 or the network device #2, and user plane data transceiving in both the source cell and the target cell by the terminal device are the same.

It should be understood that, in the embodiments of the present application, the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device, which means that the sum of the configurations related to the radio access capability of the terminal device in the first configuration and the second configuration exceeds the radio access capability of the terminal device. For example, the first configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the target cell, the second configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the source cell, and the sum of the first configuration and the second configuration exceeding the radio access capability of the terminal device may mean that the sum of the number of uplink radio frequency transmission channels used by the terminal device in the target cell and the number of uplink radio frequency transmission channels used by the terminal device in the source cell exceeds the radio access capability of the terminal device (i.e., the maximum supported number of uplink radio frequency transmission channels).

Similarly, the sum of the first configuration and the third configuration described in the embodiments of the present application does not exceed the radio access capability of the terminal device, which means that the sum of the configurations related to the radio access capability of the terminal device in the first configuration and the third configuration does not exceed the radio access capability of the terminal device. For example, the first configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the target cell, the third configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the source cell, and the sum of the first configuration and the third configuration does not exceed the radio access capability of the terminal device.

Illustratively, the first configuration related to the radio access capability of the terminal device comprises one or more of: the number of uplink radio frequency transmission channels, the number of downlink radio frequency reception channels, the number of sounding reference signal (sounding reference signal, SRS) resources, the number of ports of SRS resources, the number of channel state information reference signal (channel state information reference signal, CSI-RS) resources, and the number of ports of CSI-RS resources.

The second configuration related to radio access capabilities of the terminal device comprises one or more of: the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of SRS resources, the number of ports of the SRS resources, the number of CSI-RS resources and the number of ports of the CSI-RS resources.

The third configuration related to radio access capabilities of the terminal device comprises one or more of the following: the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of SRS resources, the number of ports of the SRS resources, the number of CSI-RS resources and the number of ports of the CSI-RS resources.

The second configuration is a configuration used in the source cell before the handover of the terminal device occurs, or the second configuration is a configuration used for communication in the source cell before the handover of the terminal device occurs. The second configuration includes one or more of the following: PCI of source cell, measurement configuration, mobile control (mobile control) configuration, radio resource configuration, access Stratum (AS) security configuration, C-RNTI allocated by network device #1 to terminal device. The radio resource configuration may be a Radio Bearer (RB) configuration or a medium access control (medium access control, MAC) primary configuration, a physical channel configuration, or the like.

As described above, the third configuration is a configuration used in the source cell in the process of the terminal device performing DAPS handover. Since the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device, and the sum of the first configuration and the third configuration does not exceed the radio access capability of the terminal device. Therefore, the third configuration is changed in relation to the radio access capability of the terminal device compared to the second configuration. Specifically, the third configuration has a lower specification of the configuration related to the radio access capability of the terminal device than the second configuration. For example, the third configuration and the second configuration both include the number of uplink radio frequency transmission channels used by the terminal device in the source cell, and the third configuration includes the number of uplink radio frequency channels used by the terminal device in the source cell that is smaller than the number of uplink radio frequency channels used by the terminal device in the source cell.

To sum up, in S220, when the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device, the terminal device reduces the configuration used in the source cell from the second configuration to the third configuration, and communicates with the network device #1 through the third configuration in the process of switching the terminal device from the source cell to the target cell.

The embodiments of the present application do not limit the timing at which the terminal device determines whether the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device.

As an example, the terminal device first determines whether the second configuration has already fully occupied the radio access capability of the terminal device, and in the case where the second configuration has already fully occupied the radio access capability of the terminal device, after receiving the DAPS handover command included in the first RRC reconfiguration message, the terminal device may directly determine that the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device; and under the condition that the second configuration does not occupy the wireless access capability of the terminal equipment, after the terminal equipment receives the DAPS switching command included in the first RRC reconfiguration message, determining whether the sum of the first configuration and the second configuration exceeds the wireless access capability of the terminal equipment. Wherein the second configuration is full of radio access capabilities of the terminal device means that when the terminal device communicates with the network device #1 through the second configuration, the terminal device has no capability to support communication with other cells or network devices (e.g., the terminal device has no capability to support communication with the network device #2 in the target cell). Conversely, the second configuration not occupying the wireless access capability of the terminal device means that the terminal device has the capability to support communication with other cells or network devices when the terminal device communicates with network device #1 via the second configuration.

For example, the terminal device supports multiple-input multiple-output (multi input multi output, MIMO) capability for the uplink 3 radio frequency transmit channels (abbreviated as 3T). When the second configuration includes 3T, the terminal device determines that the second configuration fills up the radio access capability of the terminal device, and further, after the terminal device receives the DAPS handover command included in the first RRC reconfiguration message, it may directly determine that the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device. When the second configuration includes 2 uplink radio frequency transmission channels (abbreviated as 2T), the terminal device determines that the second configuration does not occupy the radio access capability of the terminal device. After receiving the DAPS handover command included in the first RRC reconfiguration message, the terminal device may know that the first configuration includes 2T, and further the terminal device may determine that the sum of the first configuration and the second configuration is 4 uplink radio frequency transmission channels (abbreviated as 4T), which exceeds the radio access capability of the terminal device.

As another example, the terminal device first determines whether the first configuration has already fully occupied the radio access capability of the terminal device, and in case the first configuration does not fully occupy the radio access capability of the terminal device, the terminal device again determines whether the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device. Wherein the first configuration does not fill the radio access capability of the terminal device means that the terminal device has the capability to support communication with other cells or network devices when the terminal device communicates with the network device #2 via the first configuration.

For example, the terminal device supports MIMO capability of 3T. When the first configuration includes 2T, the terminal device determines that the first configuration does not fill the wireless access capability of the terminal device. Further, when the second configuration includes 2T, the terminal device may determine that the sum of the first configuration and the second configuration is 4T, exceeding the wireless access capability of the terminal device.

As yet another example, after receiving the DAPS handoff command included in the first RRC reconfiguration message, the terminal device determines whether the sum of the first configuration and the second configuration exceeds the wireless access capability of the terminal device.

Illustratively, in S220, when the sum of the first specification included in the first configuration and the first specification included in the second configuration exceeds the radio access capability of the terminal device, the terminal device communicates with the network device #1 through the third configuration in the process of switching the terminal device from the source cell to the target cell. Wherein the third configuration comprises a first specification and the first configuration comprises a first specification which together do not exceed the radio access capability of the terminal device. That is, when the sum of the first specification included in the first configuration and the first specification included in the second configuration exceeds the radio access capability of the terminal device, the terminal device reduces the first specification used in the source cell from the first specification included in the second configuration to the first specification included in the third configuration, and communicates with the network device #1 through the first specification included in the third configuration in the process of switching the terminal device from the source cell to the target cell.

Illustratively, the first specification includes one or more of: the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of SRS resources, the number of ports of the SRS resources, the number of CSI-RS resources and the number of ports of the CSI-RS resources.

Taking the first specification as an example, the number of uplink radio frequency transmission channels is included. Assuming that the terminal device supports MIMO capability of 3T, the first configuration includes 2T and the second configuration includes 2T. As can be seen, the sum of the first configuration and the second configuration is 4T, which exceeds the radio access capability of the terminal device, the terminal device may reduce the number of uplink radio frequency transmission channels used in the source cell to 1, i.e. the third configuration includes 1 uplink radio frequency transmission channel (1T for short). When the third configuration comprises 1T, the sum of the first configuration and the third configuration is 3T, and the radio access capability of the terminal device is not exceeded.

It will be appreciated that the first configuration is lower than the radio access capability of the terminal device in case the sum of the first configuration and the third configuration does not exceed the radio access capability of the terminal device. That is, the first configuration does not take over the radio access capabilities of the terminal device, thereby enabling the terminal device to also be capable of supporting communication with the network device #1 via the third configuration. Thus, in S220, when the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device and the first configuration is lower than the radio access capability of the terminal device, the terminal device communicates with the network device #1 through the third configuration in the process of switching the terminal device from the source cell to the target cell.

S230, the terminal device transmits an RRC reconfiguration complete (RRC reconfiguration complete) message. Accordingly, in S230, the network device #2 receives the RRC reconfiguration complete message.

Specifically, in S230, after the terminal device succeeds in accessing the target cell, the terminal device transmits an RRC reconfiguration complete message to the network device # 2.

S240, the terminal equipment receives the second RRC reconfiguration message. Accordingly, in S240, the network device #2 transmits a second RRC reconfiguration message.

Specifically, in S240, after the terminal device successfully switches to the target cell, the network device #2 sends a second RRC reconfiguration message to the terminal device, where the second RRC reconfiguration message is used to indicate to release the source cell, that is, to indicate to release the third configuration.

In the embodiment of the present application, after receiving the DAPS handover command included in the first RRC reconfiguration message, if it is determined that the sum of the configuration of the source cell and the configuration of the target cell exceeds the radio access capability of the terminal device, in the process of switching the terminal device from the source cell to the target cell, the terminal device reduces the configuration of the source cell, so that the sum of the configuration of the source cell and the configuration of the target cell after the reduction does not exceed the radio access capability of the terminal device, thereby avoiding service interruption caused by the terminal device initiating RRC reestablishment, and being beneficial to ensuring continuity of services.

Fig. 3 is a schematic flow chart of a method 300 provided by an embodiment of the present application, shown from the perspective of device interaction. As shown in fig. 3, the method 300 may include S310 to S330, and the respective steps are described in detail below.

S310, the network device #1 transmits a first RRC reconfiguration message. Accordingly, in S310, the terminal device receives a first RRC reconfiguration message.

Specifically, S310 is the same as S210 in the method 200, and for brevity, embodiments of the present application will not be described in detail.

S320, the terminal equipment releases the second configuration.

For a description of the second configuration, reference may be made to S220 above, which is not described in detail herein for brevity.

Specifically, in S320, when the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device, the terminal device releases the second configuration.

Releasing the second configuration by the terminal device may be understood as deleting the stored second configuration by the terminal device, or releasing the link between the terminal device and the source cell by the terminal device, or releasing the connection with the network device #1 by the terminal device. It will be appreciated that after the terminal device releases the second configuration, the terminal device will not have a data interaction with network device #1 until the terminal device re-establishes a connection with network device # 1.

It should be understood that, in the embodiments of the present application, the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device, which means that the sum of the configurations related to the radio access capability of the terminal device in the first configuration and the second configuration exceeds the radio access capability of the terminal device. For example, the first configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the target cell, and the second configuration includes the number of uplink radio frequency transmission channels used by the terminal device in the source cell. The sum of the first configuration and the second configuration exceeding the radio access capability of the terminal device may mean that the sum of the number of uplink radio frequency transmission channels used by the terminal device in the target cell and the number of uplink radio frequency transmission channels used by the terminal device in the source cell exceeds the radio access capability of the terminal device (i.e., the maximum supported number of uplink radio frequency transmission channels).

As an example, the terminal device first determines whether the second configuration has already fully occupied the radio access capability of the terminal device, and in the case where the second configuration has already fully occupied the radio access capability of the terminal device, after receiving the DAPS handover command included in the first RRC reconfiguration message, the terminal device may directly determine that the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device; and under the condition that the second configuration does not occupy the wireless access capability of the terminal equipment, after the terminal equipment receives the DAPS switching command included in the first RRC reconfiguration message, determining whether the sum of the first configuration and the second configuration exceeds the wireless access capability of the terminal equipment. For more relevant descriptions, reference is made to S220 above.

As another example, the terminal device first determines whether the first configuration has already fully occupied the wireless access capability of the terminal device, and in the case where the first configuration has already fully occupied the wireless access capability of the terminal device, the terminal device may determine that the sum of the first configuration and the second configuration exceeds the wireless access capability of the terminal device; in case the first configuration does not fill the radio access capability of the terminal device, the terminal device again determines whether the sum of the first configuration and the second configuration exceeds the radio access capability of the terminal device. Wherein the first configuration fills up the radio access capability of the terminal device means that when the terminal device communicates with the network device #2 through the first configuration, the terminal device has no capability to support communication with other cells or network devices (e.g., the terminal device has no capability to support communication with the network device #1 in the source cell). For more relevant descriptions, reference is made to S220 above.

Illustratively, in S320, the terminal device releases the second configuration when the sum of the first specification included in the first configuration and the first specification included in the second configuration exceeds the radio access capability of the terminal device.

Taking the first specification as an example, the number of downlink radio frequency receiving channels is included. Assuming that the terminal device supports MIMO capability of 4 radio frequency reception channels (abbreviated as 4R) in downlink, the first configuration includes 4R, and the second configuration includes 2 radio frequency reception channels (abbreviated as 2R) in downlink. It can be seen that the sum of the first configuration and the second configuration is 6 downlink radio frequency receiving channels (abbreviated as 6R), and the second configuration is released by the terminal device if the sum exceeds the radio access capability of the terminal device.

S330, the terminal equipment sends an RRC reconfiguration complete message. Accordingly, in S330, the network device #2 receives the RRC reconfiguration complete message.

After releasing the second configuration, the terminal device continues to switch from the source cell to the target cell according to the first configuration in S320. Further, in S330, after the target cell is successfully accessed, the terminal device sends an RRC reconfiguration complete message to the network device #2, where the network device #2 is the network device to which the target cell belongs.

In the embodiment of the present application, after receiving the DAPS handover command included in the first RRC reconfiguration message, if it is determined that the sum of the configuration of the source cell and the configuration of the target cell exceeds the radio access capability of the terminal device, after the terminal device releases the configuration of the source cell, the terminal device switches from the source cell to the target cell according to the configuration of the target cell, so as to avoid service interruption caused by the terminal device initiating RRC reestablishment when the sum of the configuration of the source cell and the configuration of the target cell exceeds the radio access capability of the terminal device, which is beneficial to ensuring continuity of the service.

It should be understood that in the above embodiments, the terminal device and/or the network device may perform some or all of the steps in the embodiments. These steps or operations are merely examples, and embodiments of the present application may also perform other operations or variations of the various operations. Furthermore, the various steps may be performed in a different order presented by the various embodiments, and it is possible that not all of the operations in the embodiments of the present application may be performed. The sequence number of each step does not mean the sequence of execution sequence, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The method of wireless communication provided in the embodiment of the present application is described in detail above with reference to fig. 2 to 3. The wireless communication device provided in the embodiment of the present application is described in detail below with reference to fig. 4 to 6.

Fig. 4 is a schematic block diagram of a wireless communication device provided in an embodiment of the present application. As shown in fig. 4, the communication apparatus 1000 may include a processing unit 1100 and a transceiving unit 1200.

In one possible design, the communication device 1000 may correspond to the terminal device in the above method embodiment, for example, may be a terminal device, or a component (such as a chip or a chip system) configured in the terminal device.

It is to be understood that the communication device 1000 may correspond to the terminal equipment in the methods 200 to 300 according to embodiments of the present application, and that the communication device 1000 may comprise means for performing the method 200 in fig. 2 or the method 300 in fig. 3. And, each unit in the communication device 1000 and the other operations and/or functions described above are respectively for implementing the corresponding flow of the method 200 in fig. 2 or the method 300 in fig. 3. It should be understood that the specific process of each unit performing the corresponding steps has been described in detail in the above method embodiments, and is not described herein for brevity.

It should also be understood that, when the communication device 1000 is a chip configured in a terminal device, the transceiver unit 1200 in the communication device 1000 may be implemented through an input/output interface, and the processing unit 1100 in the communication device 1000 may be implemented through a processor, a microprocessor, an integrated circuit, or the like integrated on the chip or the chip system.

In another possible design, the communication apparatus 1000 may correspond to the network device in the above method embodiment, for example, may be a network device, or a component (such as a chip or a chip system) configured in the network device.

It is to be understood that the communication apparatus 1000 may correspond to the network device #1 in the methods 200 to 300 according to the embodiments of the present application, and the communication apparatus 1000 may include means for performing the method 200 in fig. 2 or the method #1 in the method 300 in fig. 3. And, each unit in the communication device 1000 and the other operations and/or functions described above are respectively for implementing the corresponding flow of the method 200 in fig. 2 or the method 300 in fig. 3. It should be understood that the specific process of each unit performing the corresponding steps has been described in detail in the above method embodiments, and is not described herein for brevity.

It is to be understood that the communication apparatus 1000 may correspond to the network device #2 in the methods 200 to 300 according to the embodiments of the present application, and the communication apparatus 1000 may include a unit for performing the method 200 in fig. 2 or the method #2 in the method 300 in fig. 3. And, each unit in the communication device 1000 and the other operations and/or functions described above are respectively for implementing the corresponding flow of the method 200 in fig. 2 or the method 300 in fig. 3. It should be understood that the specific process of each unit performing the corresponding steps has been described in detail in the above method embodiments, and is not described herein for brevity.

It should also be understood that, when the communication apparatus 1000 is a chip configured in a network device, the transceiver unit 1200 in the communication apparatus 1000 may be implemented through an input/output interface, and the processing unit 1100 in the communication apparatus 1000 may be implemented through a processor, a microprocessor, an integrated circuit, or the like integrated on the chip or the chip system.

Fig. 5 is a schematic block diagram of a wireless communication device according to another embodiment of the present application. The communication apparatus 2000 shown in fig. 5 may include: memory 2100, processor 2200, and communication interface 2300. The memory 2100 and the processor 2200 are connected through an internal connection path, the memory 2100 is used for storing instructions, and the processor 2200 is used for executing the instructions stored in the memory 2100 to control the input/output interface to receive/transmit messages. Alternatively, the memory 2100 may be coupled to the processor 2200 through an interface or may be integrated with the processor 2200.

Note that the communication interface 2300 described above uses a transceiver device such as, but not limited to, a transceiver to realize communication between the communication device 2000 and other devices or communication networks. The communication interface 2300 may also include an input/output interface (input/output interface).

In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in the processor 2200. The method disclosed in connection with the embodiments of the present application may be embodied directly in hardware processor execution or in a combination of hardware and software modules in a processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. Which is located in the memory 2100, the processor 2200 reads the information in the memory 2100 and, in combination with its hardware, performs the steps of the method described above. To avoid repetition, a detailed description is not provided herein.

It should be appreciated that in embodiments of the present application, the processor may be a central processing unit (central processing unit, CPU), the processor may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that in embodiments of the present application, the memory may include read only memory and random access memory, and provide instructions and data to the processor. A portion of the processor may also include nonvolatile random access memory. The processor may also store information of the device type, for example.

Fig. 6 is a schematic diagram of a chip system according to an embodiment of the present application. The chip system here can also be a system of circuits. The chip system 3000 shown in fig. 6 includes: logic 3100 and an input/output interface 3200 for coupling to an input interface through which data (e.g., DAPS switch commands) are transferred to perform the methods described in fig. 2-3.

The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to perform the method of any of the method embodiments described above.

It should be understood that the processing means described above may be one or more chips. For example, the processing device may be a field programmable gate array (field programmable gate array, FPGA), an application specific integrated chip (application specific integrated circuit, ASIC), a system on chip (SoC), a central processing unit (central processor unit, CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), a microcontroller (micro controller unit, MCU), a programmable controller (programmable logic device, PLD) or other integrated chip.

According to the method provided by the embodiment of the application, the application further provides a computer program product, which comprises: computer program code which, when run on a computer, causes the computer to perform the method performed by the terminal device in the embodiments shown in fig. 2 to 3.

According to the method provided in the embodiments of the present application, there is further provided a computer readable storage medium storing a program code, which when executed on a computer, causes the computer to perform the method performed by the terminal device in the embodiments shown in fig. 2 to 3.

According to the method provided by the embodiment of the application, the application further provides a system, which comprises one or more of the terminal devices and/or the network devices (the network device #1 and the network device # 2).

The terminal device in the above-mentioned respective apparatus embodiments and the terminal device in the method embodiments completely correspond to each other, and the respective steps are performed by respective modules or units, for example, the transceiver unit (transceiver) performs the steps of receiving or transmitting in the method embodiments, and other steps than transmitting and receiving may be performed by the processing unit (processor). Reference may be made to corresponding method embodiments for the function of a specific unit. Wherein the processor may be one or more.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components may reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between 2 or more computers. Furthermore, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with one another in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Those of ordinary skill in the art will appreciate that the various illustrative logical blocks (illustrative logical block) and steps (steps) described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

In the above-described embodiments, the functions of the respective functional units may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (program) are loaded and executed on a computer, the processes or functions described in accordance with the embodiments of the present application are fully or partially produced.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be substantially contributing or a part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely 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 think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to 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

A method of wireless communication, comprising:

receiving a first radio resource control, RRC, reconfiguration message from a network device to which a source cell belongs, the first RRC reconfiguration message including a dual activation protocol stack, DAPS, handover command for indicating handover from the source cell to a target cell, the DAPS handover command including a first configuration for use at the target cell, the first configuration not exceeding radio access capability;

when the sum of the first configuration and the second configuration exceeds the wireless access capability, communicating with the network equipment to which the source cell belongs through a third configuration, or releasing the second configuration; the second configuration is a configuration used at the source cell prior to handover, and the sum of the third configuration and the first configuration does not exceed the radio access capability;

And after the target cell is successfully accessed through the first configuration, sending an RRC reconfiguration complete message to the network equipment to which the target cell belongs.
The method according to claim 1, wherein if communicating with the network device to which the source cell belongs through the third configuration, the method further comprises:

and receiving a second RRC reconfiguration message, wherein the second RRC reconfiguration message is used for indicating the release of the third configuration.
The method according to claim 1 or 2, wherein said communicating with the network device to which the source cell belongs via a third configuration or releasing the second configuration when the sum of the first configuration and the second configuration exceeds the radio access capability, comprises:

and when the sum of the first configuration and the second configuration exceeds the wireless access capability and the first configuration is lower than the wireless access capability, communicating with the network equipment of the source cell through the third configuration.
A method according to any one of claims 1 to 3, characterized in that:

the first configuration includes one or more of: the method comprises the steps of the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of sounding reference signal SRS resources, the number of ports of SRS resources, the number of channel state information reference signal CSI-RS resources and the number of ports of CSI-RS resources;

The second configuration includes one or more of: the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of SRS resources, the number of ports of the SRS resources, the number of CSI-RS resources and the number of ports of the CSI-RS resources;

the third configuration includes one or more of the following: the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of SRS resources, the number of ports of the SRS resources, the number of CSI-RS resources and the number of ports of the CSI-RS resources.
A wireless communication device is characterized by comprising a receiving and transmitting unit and a processing unit,

the transceiver unit is configured to receive a first radio resource control RRC reconfiguration message from a network device to which a source cell belongs, where the first RRC reconfiguration message includes a dual-activation protocol stack DAPS handover command, where the DAPS handover command is configured to instruct handover from the source cell to a target cell, where the DAPS handover command includes a first configuration used in the target cell, and where the first configuration does not exceed a radio access capability;

when the sum of the first configuration and the second configuration exceeds the wireless access capability, the transceiver unit is used for communicating with network equipment to which the source cell belongs through a third configuration, or the processing unit is used for releasing the second configuration; the second configuration is a configuration used at the source cell prior to handover, and the sum of the third configuration and the first configuration does not exceed the radio access capability;

The transceiver is further configured to send an RRC reconfiguration complete message to a network device to which the target cell belongs, after the access to the target cell through the first configuration is successful.
The apparatus of claim 5, wherein the transceiver unit is further configured to receive a second RRC reconfiguration message, the second RRC reconfiguration message being configured to indicate release of the third configuration.
The apparatus according to claim 5 or 6, wherein the transceiving unit is configured to communicate with a network device to which the source cell belongs via the third configuration when the sum of the first configuration and the second configuration exceeds the radio access capability and the first configuration is lower than the radio access capability.
The apparatus according to any one of claims 5 to 7, wherein:

the first configuration includes one or more of: the method comprises the steps of the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of sounding reference signal SRS resources, the number of ports of SRS resources, the number of channel state information reference signal CSI-RS resources and the number of ports of CSI-RS resources;

the second configuration includes one or more of: the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of SRS resources, the number of ports of the SRS resources, the number of CSI-RS resources and the number of ports of the CSI-RS resources;

The third configuration includes one or more of the following: the number of uplink radio frequency transmission channels, the number of downlink radio frequency receiving channels, the number of SRS resources, the number of ports of the SRS resources, the number of CSI-RS resources and the number of ports of the CSI-RS resources.
A computer readable storage medium, characterized in that a computer program is stored thereon, which computer program, when executed, is caused to perform the method of any of claims 1 to 4.
A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 1 to 4.
A wireless communications apparatus, comprising:

a processor and a memory, wherein the memory is for storing program instructions, the processor being for executing the program instructions in the memory to implement the method of any one of claims 1 to 4.
A wireless communications apparatus, comprising:

a processing circuit and an interface circuit; wherein,

the interface circuit is configured to couple with a memory external to the wireless communication device and provide a communication interface for the processing circuit to access the memory;

The processing circuitry is configured to execute program instructions in the memory to implement the method of any of claims 1 to 4.