Wireless communication method, network device and terminal device

Abstract

A wireless communication method, network device and terminal device, the method comprising: the network device sends first indication information to the terminal device, the first indication information is used to add a second connection between the terminal device and the network device, wherein there is a first connection between the terminal device and the network device.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and specifically to a wireless communication method, network equipment, and terminal equipment. Background Art

[0002] In some scenarios, a remote terminal may be connected to a network via one path (e.g., a direct path or a relay path), or may be connected to a network via multiple paths (e.g., a direct path and a relay path). When a remote terminal is connected to a network via one path, how to switch to connecting to the network via multiple paths, and when a remote terminal is connected to a network via multiple paths, how to switch to connecting to the network via one path is an issue that needs to be addressed. Summary of the invention

[0003] The present application provides a wireless communication method, a network device and a terminal device. By adding another connection between the network device and the terminal device, the connection between the terminal device and the network device can be converted from a single connection to multiple connections, or by releasing or deactivating a connection between the network device and the terminal device, the connection between the terminal device and the network device can be converted from multiple connections to a single connection.

[0004] In a first aspect, a wireless communication method is provided, which is applied to a network device, wherein a first connection is provided between the network device and a terminal device, and the method includes:

[0005] The network device sends first indication information to the terminal device, where the first indication information is used to add a second connection between the terminal device and the network device.

[0006] In a second aspect, a wireless communication method is provided, which is applied to a network device, wherein a first connection and a second connection are provided between the network device and a terminal device, and the second connection is in a deactivated state, and the method includes:

[0007] The network device activates the second connection.

[0008] In a third aspect, a wireless communication method is provided, which is applied to a network device, wherein a first connection and a second connection are provided between the network device and a terminal device, and the method includes:

[0009] The network device releases the first connection between the terminal device and the network device, and / or

[0010] The network device deactivates the first connection.

[0011] In a fourth aspect, a wireless communication method is provided, which is applied to a terminal device, wherein a first connection is provided between the terminal device and a network device, and the method includes:

[0012] The terminal device receives first indication information sent by the network device, where the first indication information is used to add a second connection between the terminal device and the network device.

[0013] In a fifth aspect, a wireless communication method is provided, which is applied to a terminal device, wherein a first connection and a second connection are provided between the terminal device and a network device, and the second connection is in a deactivated state, and the method includes:

[0014] The terminal device activates the second connection.

[0015] In a sixth aspect, a wireless communication method is provided, which is applied to a terminal device, wherein a first connection and a second connection are provided between the terminal device and a network device, and the method includes:

[0016] The terminal device releases the first connection between the terminal device and the network device, and / or

[0017] The terminal device deactivates the first connection.

[0018] In a seventh aspect, a network device is provided, which is used to execute the method in any one of the first to third aspects or any implementation thereof. Specifically, the network device includes a unit for executing the method in any one of the first to third aspects or any implementation thereof.

[0019] In an eighth aspect, a terminal device is provided, which is used to execute the method in any aspect of the fourth to sixth aspects or any implementation thereof. Specifically, the terminal device includes a unit for executing the method in any aspect of the fourth to sixth aspects or any implementation thereof.

[0020] In a ninth aspect, a network device is provided, the terminal device comprising: 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 any one of the first to sixth aspects or its respective implementations.

[0021] In a tenth aspect, a chip is provided for implementing the method in any aspect of the first to sixth aspects or in each of its implementations.

[0022] Specifically, the chip includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes a method as described in any one of the first to sixth aspects or its various implementations.

[0023] In the eleventh aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method in any one of the first to sixth aspects or any of its implementations.

[0024] In a twelfth aspect, a computer program product is provided, comprising computer program instructions, which enable a computer to execute the method in any one of the first to sixth aspects or its various implementations.

[0025] In a thirteenth aspect, a computer program is provided, which, when executed on a computer, enables the computer to execute the method in any one of the first to sixth aspects or in each of its implementations.

[0026] Based on the above technical solution, the conversion of the connection between the terminal device and the network device from a single connection to multiple connections can be achieved by adding another connection between the network device and the terminal device, or the conversion of the connection between the terminal device and the network device from multiple connections to a single connection can be achieved by releasing or deactivating a connection between the network device and the terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the transmission protocol stack in the 5G system.

[0029] Figure 3 It is a schematic diagram of multiple connections between terminal devices and network devices.

[0030] Figure 4 is a schematic diagram of a single connection between a terminal device and a network device.

[0031] Figure 5 is another schematic diagram of a single connection between a terminal device and a network device.

[0032] Figure 6 It is a schematic diagram of a wireless communication method provided according to an embodiment of the present application.

[0033] Figure 7 A schematic interaction diagram of a wireless communication method according to an embodiment of the present application.

[0034] Figure 8It is a schematic interaction diagram of a wireless communication method according to another embodiment of the present application.

[0035] Fig. 9 It is a schematic diagram of another wireless communication method provided in an embodiment of the present application.

[0036] Fig.10 It is a connection diagram between terminal devices and network devices.

[0037] Fig.11 It is another connection diagram between terminal devices and network devices.

[0038] Fig.12 It is a schematic diagram of another wireless communication method provided in an embodiment of the present application.

[0039] Fig.13 It is a schematic diagram of another wireless communication method provided in an embodiment of the present application.

[0040] Fig.14 It is a schematic diagram of another wireless communication method provided in an embodiment of the present application.

[0041] Fig.15 It is a schematic interaction diagram of a wireless communication method according to an embodiment of the present application.

[0042] Fig.16 It is a schematic interaction diagram of a wireless communication method according to another embodiment of the present application.

[0043] Fig.17 It is a schematic block diagram of a network device provided in an embodiment of the present application.

[0044] Fig.18 It is a schematic block diagram of a terminal device provided in an embodiment of the present application.

[0045] Fig.19 It is a schematic block diagram of another network device provided in an embodiment of the present application.

[0046] Fig. 20 This is a schematic block diagram of another terminal device provided in an embodiment of the present application.

[0047] Fig.21 This is a schematic block diagram of another network device provided in an embodiment of the present application.

[0048] Fig. 22 This is a schematic block diagram of another terminal device provided in an embodiment of the present application.

[0049] Fig.23 It is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

[0050] Fig.24 It is a schematic block diagram of a communication device provided according to an embodiment of the present application.

[0051] Fig.25 It is a schematic block diagram of a chip provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0052] The following will describe the technical solutions in the embodiments of the present application in conjunction with the 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. For the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

[0054] 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 communications, but will also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), vehicle to vehicle (V2V) communication, or vehicle to everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0055] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0056] Optionally, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.

[0057] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, wherein the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0058] The terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system such as an NR network, or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0059] In the embodiments of the present application, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons and satellites, etc.).

[0060] In the embodiment of the present application, the terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0061] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0062] In an embodiment of the present application, the network device may be a device for communicating with a mobile device. The network device may be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (EvolutionalNode B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, or a network device in an NTN network, etc.

[0063] As an example but not limitation, in an embodiment of the present application, the network device may have a mobile characteristic, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device may also be a base station set up in a location such as land or water.

[0064] In an embodiment of the present application, the network device can provide services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency domain resources, or spectrum resources). The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0065] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 1 The communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographical area and may communicate with terminal devices located in the coverage area.

[0066] Figure 1One network device and two terminal devices are shown exemplarily. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0067] Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0068] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be referred to as a communication device. Figure 1 Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal device 120 with communication functions. The network device 110 and the terminal device 120 may be the specific devices described above and will not be repeated here. The communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0069] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0070] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0071] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0072] In the embodiments of the present application, "pre-definition" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to what is defined in the protocol.

[0073] In the embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0074] In some scenarios, a layer 2-based UE-to-Network relay UE is introduced, which can directly connect to the network. Specifically, the remote terminal is connected to the access network (e.g., gNB) and the core network (CN) (e.g., 5GC) through the UE-to-Network relay UE.

[0075] Figure 2 A schematic diagram of the transmission protocol stack of a 5G system is shown, specifically involving a remote UE, a layer 2 UE-to-Network relay UE, a gNB and a 5GC. Figure 2 As shown, the remote UE may include the following layers: Internet Protocol (IP), Uu-Service Data Adaptation Protocol (SDAP), Uu-Packet Data Convergence Protocol (PDCP), PC5-Radio Link Control (RLC), PC5-Media Access Control (MAC), PC5-Physics (PHY). The UE-to-Network relay UE may include the following layers: Adaptation (ADAPT), PC5-RLC, PC5-MAC, PC5-PHY, Uu-RLC, Uu-MAC, Uu-PHY. The gNB may include the following layers: Uu-SDAP, Uu-PDCP, ADAPT, Uu-RLC, Uu-MAC, Uu-PHY, N3 protocol stack. The 5GC may include the following layers: IP, N3 protocol stack.

[0076] like Figure 2 As shown, the adaptation layer (ADAPT) of the relay UE is set above the control plane and user plane RLC layer of the Uu interface between the relay UE and the gNB. Uu-SDAP, Uu-PDCP and Radio Resource Control (RRC) are terminated between the remote UE and the gNB, and RLC, MAC and PHY are terminated in each link (including the link between the remote UE and the relay UE and the link between the relay UE and the gNB).

[0077] In some embodiments, the link between the relay UE and the network can be called a Uu link, a Uu path, the direct link between the remote UE and the network can also be called a Uu link, a Uu path, and the link between the remote UE and the relay UE can be called a PC5 link, a PC5 path.

[0078] For the uplink of L2 UE-to-Network relay UE:

[0079] The adaptation layer of the relay UE supports uplink bearer mapping between access PC5 RLC channels for transmission on the Uu path between the relay UE and the network and access to the Uu channel. For uplink relay services, different end-to-end bearers (e.g., signaling radio bearers (SRB), data radio bearers (DRB)) of the same remote UE and / or different remote UEs can be N:1 mapped and data multiplexed on one Uu RLC channel.

[0080] The adaptation layer of the relay UE includes the identification information of the remote terminal of the uplink service to be relayed and the identification information of the radio bearer of the remote terminal, so that the gNB can associate the received data packets of the specific Packet Data Convergence Protocol (PDCP) entity associated with the radio bearer of the remote terminal.

[0081] For the downlink of L2 UE-to-Network relay UE:

[0082] The adaptation layer of the relay UE may be used to support downlink bearer mapping at the gNB to map the end-to-end radio bearers (e.g., SRBs, DRBs) of the remote terminal to the Uu RLC channels over the Uu path between the relay UE and the network. The adaptation layer of the relay UE may be used to support downlink N:1 bearer mapping and data multiplexing between multiple end-to-end radio bearers (e.g., SRBs, DRBs) of the remote UE and / or different remote UEs and the Uu RLC channels on the Uu path between the relay UE and the network.

[0083] The adaptation layer of the relay UE includes the identification information of the remote terminal of the downlink service to be relayed. The identification information of the remote terminal's radio bearer and the identification information of the remote terminal need to be placed in the adaptation layer of the relay UE through the gNB so that the relay UE can map the data packets received from the remote terminal's radio bearer to the PC5 RLC channel associated with the radio bearer.

[0084] In some scenarios, the remote UE may be connected to the network via multiple paths, for example, the multiple paths include a direct path between the remote UE and the network, and a relay path connecting the remote UE to the network via a relay UE.

[0085] For example, Figure 3 As shown, the remote UE can be connected to the network device through the relay UE and directly connected to the network device through the Uu interface. Among them, the remote UE and the relay UE are connected and communicated through the PC5 interface, and the relay UE and the network device are connected and communicated through the Uu interface. In some scenarios, if there are multi-hop relay UEs, the relay UEs are connected and communicated through the PC5 interface, and the last relay UE and the network device are connected and communicated through the Uu interface.

[0086] In other scenarios, the remote UE can connect to the network via a path, e.g. Figure 4 As shown, the remote UE is connected to the network via a direct path between the remote UE and the network, or, as shown Figure 5 As shown, the remote UE is connected to the network via the relay UE.

[0087] Therefore, when the remote UE is connected to the network via one path, how to switch to connecting to the network via multiple paths, and when the remote UE is connected to the network via multiple paths, how to switch to connecting to the network via one path is an urgent problem to be solved.

[0088] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and they all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0089] Figure 6 2 is a schematic interaction diagram of a wireless communication method 200 according to an embodiment of the present application, wherein a first connection is provided between a terminal device and a network device. Figure 6 As shown, the method 200 may include at least part of the following:

[0090] S210, the network device sends first indication information to the terminal device, where the first indication information is used to add a second connection between the terminal device and the network device.

[0091] In some embodiments, the terminal device may be a remote terminal, or an anchor UE.

[0092] In some embodiments, the first connection is an established connection between the terminal device and the network device, and the second connection is a connection to be added, or a connection to be established.

[0093] Therefore, in an embodiment of the present application, the network device can add a second connection between the terminal device and the network device through the first indication information, thereby realizing switching from a single connection to multiple connections between the terminal device and the network device.

[0094] It should be noted that the embodiments of the present application may be applicable to switching (or conversion) from a single connection to multiple connections, or may be applicable to switching from multiple connections to more connections. For example, switching from a single connection to a dual connection, or switching from a dual connection to a triple connection (for example, including one direct connection and two indirect connections), etc.

[0095] It should also be noted that in the embodiments of the present application, connection can also be replaced by path, link, interface, etc. For example, a single connection can also be expressed as a single path, a single link, etc., a multi-path can also be expressed as a multi-path, a multi-link, etc., a direct connection can also be expressed as a direct path, a direct link, a Uu link, a Uu path, etc., and an indirect connection can also be expressed as a relay connection, a relay path, an indirect path, an indirect link, a PC5 link, a PC5 path, a PC5 connection, etc.

[0096] In some embodiments, adding (or establishing) the second connection between the terminal device and the network device may be determined by the network device, or may be determined by the terminal device.

[0097] For example, the network device sends first indication information to the terminal device on its own to add the second connection.

[0098] For another example, the network device may send first indication information to the network device based on the request of the terminal device, so as to add the second connection.

[0099] In some embodiments, the first connection is a direct connection between the terminal device and the network device.

[0100] For example, before switching, the connection between the terminal device and the network device can be as follows: Figure 4 shown.

[0101] In some other embodiments, the first connection may be a non-direct connection between the terminal device and the network device. For example, before switching, the connection between the terminal device and the network device may be as follows: Figure 5 shown.

[0102] In some embodiments, the second connection is a non-direct connection between the terminal device and the network device.

[0103] In some other embodiments, the second connection is a direct connection between the terminal device and the network device.

[0104] In some embodiments, the indirect connection may include a PC5 connection between the terminal device and the relay terminal and a Uu connection between the relay terminal and the network device.

[0105] Case 1: the first connection is a direct connection, and the second connection is an indirect connection.

[0106] That is, the established connection is a direct connection, and the connection to be added is an indirect connection.

[0107] That is, the terminal device switches from communicating with the network device only through a direct connection to communicating with the network device through a direct connection and an indirect connection.

[0108] Optionally, in situation 1, the second connection may include one indirect connection, or may also include multiple indirect connections, wherein each indirect connection corresponds to a relay terminal.

[0109] Optionally, the relay terminal may be a layer 2 relay, or may be a layer 3 relay, which is not limited in the present application.

[0110] Case 2: the first connection is an indirect connection, and the second connection is a direct connection.

[0111] That is, the established connection is an indirect connection, and the connection to be added is a direct connection.

[0112] That is, the terminal device switches from communicating with the network device only through an indirect connection to communicating with the network device through a direct connection and an indirect connection.

[0113] It should be understood that the first indication information can be carried by any downlink information or downlink signaling, such as RRC signaling, MAC CE, etc., and this application does not limit this.

[0114] In some embodiments, the first indication information is carried by sideline configuration dedicated information.

[0115] As an example and not limitation, the sideline configuration dedicated information may include a sideline configuration dedicated new radio (SL-ConfigDedicatedNR) information element (Information Element, IE).

[0116] In some embodiments, the first indication information is used to indicate configuration information for the second connection.

[0117] As an example but not limitation, the first indication information is used to indicate at least one of the following information:

[0118] Frequency information, resource information, RLC channel configuration information, and adaptation layer configuration information used for the second connection.

[0119] That is, the configuration information for the second connection may include at least one of frequency information, resource information, RLC channel configuration information, and adaptation layer configuration information for the second connection.

[0120] In some embodiments, after establishing the second connection, the terminal device may perform side link control and / or data channel transmission and reception based on the frequency information used for the second connection.

[0121] In some embodiments, the terminal device may perform data transmission based on the resource information used for the second connection.

[0122] In some embodiments, the terminal device may establish an RLC channel on the second connection based on the RLC channel configuration information for the second connection.

[0123] In some embodiments, the terminal device may establish an adaptation layer entity on the second connection based on the adaptation layer configuration information for the second connection.

[0124] It should be understood that in the embodiment of the present application, when the second connection is added, the home cell or the primary cell of the terminal device may be switched, or the home cell or the primary cell of the terminal device may not be switched.

[0125] For example, when adding a second connection, or during a switching process, the home cell or primary cell of the terminal device can be switched from the first connection to the second connection, or can continue to remain on the first connection.

[0126] In some embodiments of the present application, the method 200 further includes:

[0127] The network device sends second indication information to the terminal device, where the second indication information is used to switch the home cell or primary cell (Pcell) of the terminal device from the first connection to the second connection.

[0128] For example, when the connection between the terminal device and the network device changes, the network device can change the association between the terminal device's home cell or primary cell and the connection, for example, switching the terminal device's home cell or primary cell from an established connection to a newly added connection.

[0129] In some embodiments, switching the home cell or primary cell (Pcell) of the terminal device from the first connection to the second connection may include:

[0130] Switching the home cell or the primary cell of the terminal device from the carrier on the first connection to the carrier on the second connection; or

[0131] Switch the home cell or primary cell of the terminal device from the cell corresponding to the carrier on the first connection to the cell corresponding to the carrier on the second connection.

[0132] It should be understood that the second indication information can be carried by any downlink information or downlink signaling, such as RRC signaling, MAC CE, etc., and this application does not limit this.

[0133] In some embodiments, the first indication information and the second indication information may be carried by the same downlink information or downlink signaling, or may be carried by different downlink information or downlink signaling, which is not limited in the present application.

[0134] In some embodiments, the second indication information can be understood as handover-related information, and the second indication information can be carried in an IE used to carry handover-related information. For example, the second indication information is carried by a synchronous reconfiguration (ReconfigurationWithSync) IE.

[0135] In some other embodiments, the second indication information may not be carried by the ReconfigurationWithSync IE.

[0136] That is, the ReconfigurationWithSync IE may include the second indication information or may not include the second indication information.

[0137] In some embodiments of the present application, the method 200 further includes:

[0138] The network device sends third indication information to the terminal device, where the third indication information is used to configure a cell corresponding to a frequency point on the first connection as a secondary cell.

[0139] It should be understood that the third indication information can be carried by any downlink information or downlink signaling, such as RRC signaling, MAC CE, etc., and this application does not limit this.

[0140] In some embodiments, the third indication information, the second indication information and the first indication information may be carried by the same downlink information or downlink signaling, or may be carried by different downlink information or downlink signaling, which is not limited in the present application.

[0141] In some embodiments, when the home cell or the primary cell of the terminal device is changed (or, the second indication information is sent), the network device sends third indication information to the terminal device.

[0142] In some embodiments of the present application, the method 200 further includes:

[0143] The network device sends fourth indication information to the terminal device, where the fourth indication information is used to determine an association relationship between the bearer between the terminal device and the network device and the connection between the terminal device and the network device.

[0144] Optionally, the fourth indication information may be used to indicate a change in an association relationship between a bearer and a connection.

[0145] As an example but not limitation, the fourth indication information is used to indicate at least one of the following:

[0146] The first bearer between the terminal device and the network device is associated with an RLC entity and / or an adaptation layer entity on the first connection;

[0147] The first bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the first connection;

[0148] The second bearer between the terminal device and the network device is associated with the RLC entity and / or the adaptation layer entity on the second connection;

[0149] The second bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the second connection.

[0150] Optionally, the first bearer and the second bearer may be the same bearer, or may be different bearers, which is not limited in the present application.

[0151] Optionally, the first bearer and the second bearer may be established bearers, or may be newly established bearers. For example, a new bearer may be established for the added second connection, which is not limited in the present application.

[0152] In some embodiments, if the fourth indication information does not indicate a mapping relationship between an established bearer and a connection, it can be understood that after the second connection is added, the mapping relationship between the established bearer and the connection does not change.

[0153] In some embodiments, when the home cell or the primary cell of the terminal device is changed (or, second indication information is sent), the network device sends fourth indication information to the terminal device so that the terminal device determines the bearer used for transmission using the first connection and / or the second connection according to the fourth indication information.

[0154] In some embodiments of the present application, the method 200 further includes:

[0155] The network device does not change the home cell or the primary cell of the terminal device.

[0156] That is, when the connection between the terminal device and the network device changes, the network device may not change the association between the terminal device's home cell or primary cell and the connection. In other words, the terminal device's home cell or primary cell is still in the established connection.

[0157] In some embodiments, the network device does not change the home cell or the primary cell of the terminal device, including:

[0158] The network device does not send ReconfigurationWithSync IE to the terminal device.

[0159] That is, the network device does not use the ReconfigurationWithSync IE, which means that the terminal device's home cell or primary cell will not be changed.

[0160] In some embodiments of the present application, the method 200 further includes:

[0161] The network device does not release the first connection, or in other words, reserves the first connection.

[0162] Correspondingly, the terminal device does not release the first connection, or in other words, retains the first connection.

[0163] In some embodiments, not releasing the first connection or retaining the first connection may include:

[0164] The configuration information for the first connection is not released or retained.

[0165] In some embodiments, not releasing or retaining the configuration information for the first connection may include:

[0166] At least one of the frequency point information, resource information, RLC channel configuration information and adaptation layer configuration information used for the first connection is not released or retained.

[0167] In some embodiments of the present application, the method 200 further includes:

[0168] The network device sends identification information of the relay terminal to the terminal device.

[0169] For example, in the case where the second connection is a non-direct connection, the network device may send identification information of the relay terminal to the terminal device, and further, the terminal device may transmit services through the relay terminal.

[0170] In some embodiments, the identification information of the relay terminal may be a physical layer identification of the terminal device, or a MAC layer identification, or other identification information that can uniquely identify the relay terminal, which is not limited in the present application.

[0171] For example, the identification information of the relay terminal may include at least one of the following:

[0172] Media access control layer identification information MAC-ID, Radio Network Temporary Identity (RNTI), 5G-S-TSMI.

[0173] In some embodiments, the RNTI may include at least one of the following:

[0174] Cell RNTI (C-RNTI), Inactive RNTI I-RNTI.

[0175] In some embodiments, the identification information of the relay terminal and the aforementioned indication information may be carried by the same downlink information or downlink signaling, or may be carried by different downlink information or downlink signaling, which is not limited in the present application.

[0176] In some embodiments, the identification information of the relay terminal can be understood as handover-related information, and the identification information of the relay terminal can be carried in an IE used to carry handover-related information. For example, the identification information of the relay terminal is carried by a synchronous reconfiguration (ReconfigurationWithSync) IE.

[0177] In some other embodiments, the identification information of the relay terminal may not be carried by the ReconfigurationWithSync IE.

[0178] That is, the ReconfigurationWithSync IE may include the identification information of the relay terminal, or may not include the identification information of the relay terminal.

[0179] In some embodiments of the present application, the method 200 further includes:

[0180] The network device sends counter related information to the terminal device.

[0181] In some embodiments, the timer-related information may be used to control establishment of the second connection.

[0182] In some embodiments, the counter-related information may include duration information of the counter.

[0183] Optionally, the counter is started when the second connection is started to be established.

[0184] Optionally, when the second connection is established, the timer is stopped.

[0185] Optionally, if the second connection is not established successfully when the timer times out, it indicates that the establishment of the second connection fails.

[0186] In some embodiments, the counter related information may be understood as handover related information, and the counter related information may be carried in an IE used to carry handover related information. For example, the counter related information is carried by ReconfigurationWithSync IE.

[0187] In some other embodiments, the counter related information may not be carried by the ReconfigurationWithSync IE.

[0188] That is, the ReconfigurationWithSync IE may include counter related information or may not include counter related information.

[0189] In some embodiments of the present application, the method 200 further includes:

[0190] The network device sends fifth indication information to the terminal device, where the fifth indication information is used to indicate at least one of the following:

[0191] retaining an access layer configuration on the direct connection;

[0192] An access layer configuration is established on the indirect connection.

[0193] For example, when the second connection is a non-direct connection, the network device may send fifth indication information to the terminal device.

[0194] In some embodiments of the present application, the method 200 further includes:

[0195] The network device sends sixth indication information to the terminal device, where the sixth indication information is used to indicate at least one of the following:

[0196] An access layer configuration is established over the direct connection.

[0197] The access layer configuration on the indirect connection is retained.

[0198] For example, when the second connection is a direct connection, the network device may send sixth indication information to the terminal device.

[0199] In some embodiments, the access layer configuration on the direct connection includes but is not limited to at least one of the following:

[0200] The RLC channel and cell related configuration on the direct connection.

[0201] In some embodiments, the access layer configuration on the indirect connection includes but is not limited to at least one of the following:

[0202] The RLC channel, adaptation layer entity, and frequency-related configurations on the indirect connection.

[0203] That is to say, when adding a second connection, the protocol layer entities, established RLC channels, cell-related configurations, etc. on the first connection can be retained, and / or the protocol layer entities (such as adaptation layer entities), RLC channels, cell-related configurations, etc. on the second connection can be established.

[0204] Hereinafter, in combination with Embodiment 1 and Embodiment 2, the embodiments of the present application are described from the perspective of device interaction, wherein the remote terminal may correspond to the terminal device mentioned above.

[0205] Embodiment 1: The first connection is a direct connection, and the second connection is an indirect connection.

[0206] For example, before switching, the connection between the terminal device and the network device can be as follows: Figure 4 As shown, after switching, the connection between the terminal device and the network device can be as follows Figure 3 shown.

[0207] like Figure 7 As shown, the following steps may be included:

[0208] S220, the network device sends target indication information to the remote terminal.

[0209] Optionally, the target indication information may include at least one of the aforementioned first indication information, second indication information, third indication information, fourth indication information, fifth indication information and sixth indication information.

[0210] In some embodiments, the network device may use the first indication information to add an indirect connection.

[0211] In some embodiments, the first indication information may indicate at least one of the following information:

[0212] Frequency information, resource information, RLC channel configuration information, and adaptation layer configuration information used for indirect connections.

[0213] In some embodiments, the first indication information is carried by SL-ConfigDescribedNR IE.

[0214] In some embodiments, the target indication information may also indicate identification information of the relay terminal and / or counter related information.

[0215] For example, the identification information of the relay terminal and / or counter related information is carried by ReconfigurationWithSync IE.

[0216] In some embodiments, the network device uses the second indication information to switch the home cell or primary cell (Pcell) of the terminal device from a direct connection to an indirect connection.

[0217] For example, the home cell or primary cell of the terminal device is switched from a carrier on a direct connection (or called a direct connection carrier) to a carrier on an indirect connection (or called an indirect connection, PC5 carrier).

[0218] In some embodiments, the second indication information is carried in the ReconfigurationWithSync IE.

[0219] For example, during the switching process, the network device uses the ReconfigurationWithSync IE to carry the second indication information to instruct the switching of the terminal device's home cell or primary cell.

[0220] In some embodiments, the network device may use the third indication information to configure a cell corresponding to a frequency point on the direct connection as a secondary cell.

[0221] In some embodiments, the network device may use fourth indication information to indicate an association relationship between the bearer between the terminal device and the network device and the connection between the terminal device and the network device.

[0222] In some embodiments, the network device may use the fifth indication information to retain the RLC channel and / or cell-related configuration on the direct connection, and / or establish the RLC channel and / or adaptation layer entity and / or cell-related configuration on the indirect connection.

[0223] In some other embodiments, the network device may not change the home cell or primary cell (Pcell) of the terminal device, that is, the home cell or primary cell (Pcell) of the terminal device is still in the direct connection.

[0224] For example, during the switching process, the network device does not use the ReconfigurationWithSync IE to indicate that the home cell or primary cell of the terminal device does not change.

[0225] Embodiment 2: The first connection is an indirect connection, and the second connection is a direct connection.

[0226] For example, before switching, the connection between the terminal device and the network device can be as follows: Figure 5 As shown, after switching, the connection between the terminal device and the network device can be as follows Figure 3 shown.

[0227] like Figure 8 As shown, the following steps may be included:

[0228] S230, the network device sends target indication information to the remote terminal.

[0229] Optionally, the target indication information may include at least one of the aforementioned first indication information, second indication information, third indication information, fourth indication information, fifth indication information and sixth indication information.

[0230] In some embodiments, the network device may use the first indication information to add a direct connection.

[0231] In some embodiments, the first indication information may indicate at least one of the following information:

[0232] Frequency information, resource information, RLC channel configuration information, and adaptation layer configuration information used for direct connection.

[0233] In some embodiments, the first indication information is carried by SL-ConfigDescribedNR IE.

[0234] In some embodiments, the network device uses the second indication information to switch the home cell or primary cell (Pcell) of the terminal device from an indirect connection to a direct connection.

[0235] For example, the home cell or primary cell of the terminal device is switched from a carrier on a non-direct connection to a carrier on a direct connection.

[0236] In some embodiments, the second indication information is carried in the ReconfigurationWithSync IE.

[0237] For example, during the switching process, the network device uses the ReconfigurationWithSync IE to carry the second indication information to instruct the switching of the terminal device's home cell or primary cell.

[0238] In some embodiments, the network device may use the third indication information to configure a cell corresponding to a frequency point on the indirect connection as a secondary cell.

[0239] In some embodiments, the network device may use fourth indication information to indicate an association relationship between the bearer between the terminal device and the network device and the connection between the terminal device and the network device.

[0240] In some embodiments, the network device may use the sixth indication information to retain the RLC channel and / or adaptation layer entity and / or cell-related configuration on the non-direct connection, and / or establish the RLC channel and / or cell-related configuration on the direct connection.

[0241] In some other embodiments, the network device does not change the home cell or primary cell (Pcell) of the terminal device.

[0242] That is, the home cell or primary cell (Pcell) of the terminal device is still in a non-direct connection.

[0243] For example, during the switching process, the network device does not use the ReconfigurationWithSync IE to indicate that the home cell or primary cell of the terminal device does not change.

[0244] In summary, in an embodiment of the present application, when a terminal device and a network device have a first connection, the network device and the terminal device can add a second connection through information interaction, thereby realizing switching from a single connection to multiple connections between the terminal device and the network device.

[0245] For example, the network device may indicate configuration information for the second connection through the first indication information.

[0246] For another example, the network device switches the home cell or the primary cell of the terminal device through the second indication information, or may not switch the home cell or the primary cell of the terminal device.

[0247] For another example, the network device configures the cell corresponding to the frequency point on the first connection as a secondary cell through the third indication information.

[0248] For another example, the network device indicates the association relationship between the bearer between the terminal device and the network device and the connection between the terminal device and the network device through the fourth indication information.

[0249] For another example, the network device indicates through the indication information to retain the access layer configuration on the first connection and / or to establish the access layer configuration on the second connection.

[0250] Fig. 9 is a schematic diagram of a wireless communication method 300 according to an embodiment of the present application. The method may be performed by Figure 1 The network device in the communication system 100 is executed, wherein a first connection and a second connection are provided between the network device and a terminal device, wherein the second connection is in a deactivated state, or a dormant state.

[0251] like Fig. 9 As shown, the method 300 may include at least part of the following:

[0252] S310: The network device activates the second connection.

[0253] In some embodiments, the terminal device may be a remote terminal, or an anchor UE.

[0254] In some embodiments, the first connection and the second connection are connections that have been established between the terminal device and the network device.

[0255] In some embodiments, the first connection is in an active state.

[0256] In some embodiments, the first connection being in an active state may include configuration information for the first connection being in an active state.

[0257] In some embodiments, the second connection being in a deactivated state may include configuration information for the second connection being in a deactivated state.

[0258] In some embodiments, the configuration information for the first connection may include at least one of the following:

[0259] Frequency information, resource information, RLC channel configuration information, and adaptation layer configuration information used for the first connection.

[0260] In some embodiments, the configuration information for the second connection may include at least one of the following:

[0261] Frequency information, resource information, RLC channel configuration information, and adaptation layer configuration information used for the second connection.

[0262] For example, when the second connection is in a deactivated state, the terminal device may not perform side link control and / or data channel transmission and reception on the frequency used for the second connection.

[0263] For another example, when the second connection is in a deactivated state, the terminal device may not transmit data on the resources used for the second connection.

[0264] In some embodiments, activation of the second connection may be determined by a network device, or may be determined by a terminal device.

[0265] For example, the network device decides on its own to activate the second connection.

[0266] For another example, the network device may activate the second connection based on a request from the terminal device.

[0267] In some embodiments, the first connection is a direct connection between the terminal device and the network device.

[0268] In some other embodiments, the first connection is a non-direct connection between the terminal device and the network device.

[0269] In some embodiments, the second connection is a non-direct connection between the terminal device and the network device.

[0270] In some other embodiments, the second connection is a direct connection between the terminal device and the network device.

[0271] In some embodiments, the indirect connection may include a PC5 connection between the terminal device and the relay terminal and a Uu connection between the relay terminal and the network device.

[0272] It should be noted that the embodiments of the present application may be applicable to switching (or conversion) from a single connection to multiple connections, or may be applicable to switching from multiple connections to more connections. For example, switching from a single connection to a dual connection, or switching from a dual connection to a triple connection (for example, including one direct connection and two indirect connections), etc.

[0273] It should also be noted that in the embodiments of the present application, connection can also be replaced by path, link, interface, etc. For example, a single connection can also be expressed as a single path, a single link, etc., a multi-path can also be expressed as a multi-path, a multi-link, etc., a direct connection can also be expressed as a direct path, a direct link, a Uu link, a Uu path, etc., and an indirect connection can also be expressed as a relay connection, a relay path, an indirect path, an indirect link, a PC5 link, a PC5 path, a PC5 connection, etc.

[0274] Case 1: the first connection is a direct connection, and the second connection is an indirect connection.

[0275] That is, before the switching, the activated connection is a direct connection, and the deactivated connection is an indirect connection.

[0276] That is, the terminal device switches from communicating with the network device only through a direct connection to communicating with the network device through a direct connection and an indirect connection.

[0277] For example, before switching, the connection between the terminal device and the network device can be as follows: Figure 3 As shown, after switching, the connection between the terminal device and the network device can be as follows Fig.10 shown.

[0278] Optionally, in situation 1, the second connection may include one indirect connection, or may also include multiple indirect connections, wherein each indirect connection corresponds to a relay terminal.

[0279] Optionally, the relay terminal may be a layer 2 relay, or may be a layer 3 relay, which is not limited in the present application.

[0280] Case 2: the first connection is an indirect connection, and the second connection is a direct connection.

[0281] That is, before the switching, the activated connection is an indirect connection, and the deactivated connection is a direct connection.

[0282] That is, the terminal device switches from communicating with the network device only through an indirect connection to communicating with the network device through a direct connection and an indirect connection.

[0283] For example, before switching, the connection between the terminal device and the network device can be as follows: Figure 3 As shown, after switching, the connection between the terminal device and the network device can be as follows Fig.11 shown.

[0284] In some embodiments, the network device activating the second connection includes:

[0285] The network device activates configuration information for the second connection.

[0286] In some embodiments, the network device activating the second connection includes:

[0287] The network device sends seventh indication information to the terminal device, where the seventh indication information is used to activate the second connection.

[0288] It should be understood that the seventh indication information can be carried by any downlink information or downlink signaling, and this application does not limit this.

[0289] In some embodiments, the seventh indication information is used to activate at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information for the second connection.

[0290] For example, in the case where the second connection is a non-direct connection, the seventh indication information is used to activate at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information used for the second connection.

[0291] For another example, when the second connection is a direct connection, the seventh indication information is used to activate at least one of the frequency information, resource information and RLC channel configuration information used for the second connection.

[0292] In some embodiments, the seventh indication information is carried via RRC signaling and / or MAC CE.

[0293] Therefore, in the embodiment of the present application, switching from a single connection to multiple connections between the terminal device and the network device can be achieved by activating a connection in a deactivated state.

[0294] Fig.12 is a schematic diagram of a wireless communication method 400 according to an embodiment of the present application, which may be performed by Figure 1 The terminal device in the communication system 100 is executed, wherein a first connection and a second connection are provided between the terminal device and a network device, wherein the second connection is in a deactivated state, or a dormant state.

[0295] like Fig.12 As shown, the method 400 may include at least part of the following:

[0296] S410, the terminal device activates the second connection.

[0297] In some embodiments, the terminal device may be a remote terminal, or an anchor UE.

[0298] In some embodiments, the first connection and the second connection are connections that have been established between the terminal device and the network device.

[0299] In some embodiments, the first connection is in an active state.

[0300] In some embodiments, the first connection being in an active state may include configuration information for the first connection being in an active state.

[0301] In some embodiments, the second connection being in a deactivated state may include configuration information for the second connection being in a deactivated state.

[0302] In some embodiments, the configuration information for the first connection may include at least one of the following:

[0303] Frequency information, resource information, RLC channel configuration information, and adaptation layer configuration information used for the first connection.

[0304] In some embodiments, the configuration information for the second connection may include at least one of the following:

[0305] Frequency information, resource information, RLC channel configuration information, and adaptation layer configuration information used for the second connection.

[0306] For example, when the second connection is in a deactivated state, the terminal device may not perform side link control and / or data channel transmission and reception on the frequency used for the second connection.

[0307] For another example, when the second connection is in a deactivated state, the terminal device may not transmit data on the resources used for the second connection.

[0308] In some embodiments, activating the second connection may be based on an instruction from a network device, or may be determined by a terminal device.

[0309] For example, the terminal device decides to activate the second connection on its own.

[0310] For another example, the terminal device may activate the second connection based on an instruction from the network device.

[0311] In some embodiments, the first connection is a direct connection between the terminal device and the network device.

[0312] In some other embodiments, the first connection is a non-direct connection between the terminal device and the network device.

[0313] In some embodiments, the second connection is a non-direct connection between the terminal device and the network device.

[0314] In some other embodiments, the second connection is a direct connection between the terminal device and the network device.

[0315] In some embodiments, the indirect connection may include a PC5 connection between the terminal device and the relay terminal and a Uu connection between the relay terminal and the network device.

[0316] Case 1: the first connection is a direct connection, and the second connection is an indirect connection.

[0317] That is, before the switching, the activated connection is a direct connection, and the deactivated connection is an indirect connection.

[0318] That is, the terminal device switches from communicating with the network device only through a direct connection to communicating with the network device through a direct connection and an indirect connection.

[0319] Optionally, in situation 1, the second connection may include one indirect connection, or may also include multiple indirect connections, wherein each indirect connection corresponds to a relay terminal.

[0320] Optionally, the relay terminal may be a layer 2 relay, or may be a layer 3 relay, which is not limited in the present application.

[0321] Case 2: the first connection is an indirect connection, and the second connection is a direct connection.

[0322] That is, before the switching, the activated connection is an indirect connection, and the deactivated connection is a direct connection.

[0323] That is, the terminal device switches from communicating with the network device only through an indirect connection to communicating with the network device through a direct connection and an indirect connection.

[0324] In some embodiments, the terminal device activates the second connection, including:

[0325] The terminal device activates configuration information for the second connection.

[0326] In some embodiments, the terminal device activates the second connection, including:

[0327] The terminal device receives seventh indication information sent by the network device, where the seventh indication information is used to activate the second connection.

[0328] It should be understood that the seventh indication information can be carried by any downlink information or downlink signaling, and this application does not limit this.

[0329] In some embodiments, the seventh indication information is used to activate at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information for the second connection.

[0330] For example, in the case where the second connection is a non-direct connection, the seventh indication information is used to activate at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information used for the second connection.

[0331] For another example, when the second connection is a direct connection, the seventh indication information is used to activate at least one of the frequency information, resource information and RLC channel configuration information used for the second connection.

[0332] In some embodiments, the seventh indication information is carried via RRC signaling and / or MAC CE.

[0333] Therefore, in the embodiment of the present application, switching from a single connection to multiple connections between the terminal device and the network device can be achieved by activating a connection in a deactivated state.

[0334] Fig.13 is a schematic diagram of a wireless communication method 500 according to an embodiment of the present application, which may be performed by Figure 1 The network device in the communication system 100 is executed, wherein a first connection and a second connection are provided between the network device and the terminal device.

[0335] like Fig.13 As shown, the method 500 may include at least part of the following:

[0336] S510: the network device releases the first connection between the terminal device and the network device, and / or

[0337] The network device deactivates the first connection.

[0338] In some embodiments, the terminal device may be a remote terminal, or an anchor UE.

[0339] In some embodiments, the first connection and the second connection may be connections that have been established between the terminal device and the network device.

[0340] In some embodiments, the first connection is in an active state and the second connection is in an active state.

[0341] In some embodiments, the first connection being in an active state may include configuration information for the first connection being in an active state.

[0342] In some embodiments, the second connection being in an activated state may include configuration information for the second connection being in an activated state.

[0343] In some embodiments, releasing the first connection may be determined by a network device, or may be determined by a terminal device.

[0344] For example, the network device decides to release the first connection on its own.

[0345] For another example, the network device may release the first connection based on a request from the terminal device.

[0346] In some embodiments, deactivating the first connection may be determined by a network device, or may be determined by a terminal device.

[0347] For example, the network device decides to deactivate the first connection on its own.

[0348] For another example, the network device may deactivate the first connection based on a request from the terminal device.

[0349] It should be noted that the embodiments of the present application may be applicable to switching from multiple connections to a single connection, or may be applicable to switching from multiple connections to fewer connections. For example, dual connections may be switched to a single connection, or triple connections (for example, including one direct connection and two indirect connections) may be switched to dual connections, etc.

[0350] It should also be noted that in the embodiments of the present application, connection can also be replaced by path, link, interface, etc. For example, a single connection can also be expressed as a single path, a single link, etc., a multi-path can also be expressed as a multi-path, a multi-link, etc., a direct connection can also be expressed as a direct path, a direct link, a Uu link, a Uu path, etc., and an indirect connection can also be expressed as a relay connection, a relay path, an indirect path, an indirect link, a PC5 link, a PC5 path, a PC5 connection, etc.

[0351] In some embodiments, the first connection is a direct connection between the terminal device and the network device.

[0352] In some other embodiments, the first connection is a non-direct connection between the terminal device and the network device.

[0353] That is, the connection to be released or the connection to be deactivated may be a direct connection or an indirect connection between the terminal device and the network device.

[0354] In some embodiments, the second connection is a non-direct connection between the terminal device and the network device.

[0355] In some other embodiments, the second connection is a direct connection between the terminal device and the network device.

[0356] In some embodiments of the present application, the network device releasing the first connection includes:

[0357] The network device releases configuration information for the first connection; and / or

[0358] The network device releases the primary cell used to release the first connection, and / or,

[0359] Switch the home cell or primary cell of the terminal device from the first connection to the second connection.

[0360] In some embodiments of the present application, the network device releasing the first connection includes:

[0361] The network device sends eighth indication information to the terminal device, where the eighth indication information is used to release the first connection between the terminal device and the network device.

[0362] In some embodiments, the eighth indication information is used to indicate the release of configuration information used for the first connection.

[0363] For example, the eighth indication information is used to indicate the release of at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information used for the first connection.

[0364] It should be understood that the eighth indication information can be carried by any downlink information or downlink signaling, such as RRC signaling or MAC CE, etc., and this application does not limit this.

[0365] In some embodiments, the eighth indication information is carried by sideline configuration dedicated information.

[0366] As an example and not limitation, the sideline configuration dedicated information may include a sideline configuration dedicated new radio (SL-ConfigDedicatedNR) information element (Information Element, IE).

[0367] In some embodiments, the network device may release the non-direct connection between the terminal device and the network device via SL-ConfigDescribedNR IE.

[0368] In some embodiments, the eighth indication information is carried by a secondary cell release list (sCellToReleaseList) IE and / or an RLC bearer release list (rlc-BearerToReleaseList) IE.

[0369] In some embodiments, the network device may release the direct connection between the terminal device and the network device through sCellToReleaseList IE and / or rlc-BearerToReleaseList IE.

[0370] In some other embodiments of the present application, the network device releases the first connection between the terminal device and the network device, including:

[0371] The network device sends ninth indication information to the terminal device, where the ninth indication information is used to release the primary cell on the first connection.

[0372] That is, the network device may release the first connection by releasing the primary cell or the home cell on the first connection.

[0373] It should be understood that the ninth indication information can be carried by any downlink information or downlink signaling, and this application does not limit this.

[0374] As an example but not limitation, the ninth indication information is carried by radio resource control RRC reconfiguration (RRCReconfiguration) signaling.

[0375] For example, the RRCReconfiguration message may include explicit indication information, indicating the release of the primary cell or the home cell on the first connection.

[0376] In some embodiments of the present application, the network device deactivating the first connection includes:

[0377] The network device deactivates configuration information for the first connection.

[0378] In some embodiments, the network device sends tenth indication information to the terminal device, and the tenth indication information is used to indicate deactivation of configuration information for the first connection. For example, the tenth indication information is used to indicate deactivation of at least one of frequency point information, resource information, RLC channel configuration information, and adaptation layer configuration information for the first connection.

[0379] It should be understood that the tenth indication information can be carried by any downlink information or downlink signaling, and this application does not limit this.

[0380] As an example but not limitation, the tenth indication information is carried via RRC signaling and / or MAC CE.

[0381] In some other embodiments of the present application, the network device may deactivate the first connection by deactivating a bandwidth portion (BandWidth, BWP) corresponding to a frequency point on the first connection.

[0382] For example, the network device may send eleventh indication information to the terminal device, where the eleventh indication information is used to deactivate the BWP on a first frequency point, where the first frequency point is a frequency point used for the first connection.

[0383] It should be understood that in an embodiment of the present application, when the first connection is released or the first connection is deactivated, the terminal device's home cell or primary cell may be switched, or the terminal device's home cell or primary cell may not be switched.

[0384] For example, when the terminal device's home cell or primary cell is in the first connection, the terminal device's home cell or primary cell is switched, or the terminal device's home cell or primary cell is not switched.

[0385] For another example, when the home cell or the primary cell of the terminal device is in the second connection, the home cell or the primary cell of the terminal device may not be switched.

[0386] In some embodiments of the present application, the method 500 further includes:

[0387] The network device switches the home cell or the primary cell of the terminal device from the first connection to the second connection.

[0388] That is, when releasing the first connection or deactivating the first connection, the network device may switch the home cell or primary cell of the terminal device from the first connection to the second connection. For example, the home cell or primary cell of the terminal device is switched from the carrier on the first connection to the carrier on the second connection, or the home cell or primary cell of the terminal device is switched from the cell corresponding to the carrier on the first connection to the cell corresponding to the carrier on the second connection.

[0389] For example, when the home cell or the primary cell of the terminal device is in the first connection, the network device may switch the home cell or the primary cell of the terminal device from the first connection to the second connection.

[0390] In some embodiments, the network device switches the home cell or the primary cell of the terminal device from the first connection to the second connection, including:

[0391] The network device sends twelfth indication information to the terminal device, where the twelfth indication information is used to instruct the terminal device to switch its home cell or primary cell from the first connection to the second connection.

[0392] For example, the twelfth indication information is used to indicate that the terminal device's belonging cell or primary cell is switched from the carrier on the first connection to the carrier on the second connection, or that the terminal device's belonging cell or primary cell is switched from the cell corresponding to the carrier on the first connection to the cell corresponding to the carrier on the second connection.

[0393] It should be understood that the twelfth indication information can be carried by any downlink information or downlink signaling, and this application does not limit this.

[0394] In some embodiments, the twelfth indication information may be understood as handover-related information, and the twelfth indication information may be carried in an IE used to carry handover-related information.

[0395] For example, the twelfth indication information is carried by the synchronous reconfiguration (ReconfigurationWithSync) IE.

[0396] It should be understood that in the embodiments of the present application, when there is no contradiction, the above indication information can be carried by the same downlink information or downlink signaling, or can be carried by different downlink information or downlink signaling, and the present application does not limit this.

[0397] In some embodiments of the present application, the method 500 further includes:

[0398] The network device does not change the home cell or the primary cell of the terminal device.

[0399] In some embodiments, the network device does not change the home cell or the primary cell of the terminal device, including:

[0400] The network device does not send ReconfigurationWithSync IE to the terminal device.

[0401] That is, when the connection status between the terminal device and the network device changes, the network device may not change the association between the terminal device's home cell or primary cell and the connection.

[0402] For example, when the home cell or primary cell of the terminal device is in the second connection, the network device may not change the home cell or primary cell of the terminal device.

[0403] In summary, in an embodiment of the present application, when a terminal device and a network device have a first connection and a second connection, switching from multiple connections to a single connection between the terminal device and the network device can be achieved by releasing or deactivating one of the connections.

[0404] For example, the network device may instruct to release the first connection through eighth indication information.

[0405] For another example, the network device instructs, through the ninth indication information, to release the primary cell on the first connection.

[0406] For another example, the network device instructs to deactivate the first connection through tenth indication information.

[0407] For another example, the network device deactivates the first connection by instructing, through the eleventh indication information, to deactivate the BWP corresponding to the frequency point on the first connection.

[0408] For another example, the network device instructs, through the twelfth indication information, to switch the home cell or the primary cell of the terminal device from the first connection to the second connection.

[0409] Fig.14 is a schematic diagram of a wireless communication method 600 according to an embodiment of the present application, which may be performed by Figure 1The terminal device in the communication system 100 is executed, wherein a first connection and a second connection are provided between the terminal device and the network device.

[0410] like Fig.14 As shown, the method 600 may include at least part of the following:

[0411] S610: The terminal device releases the first connection between the terminal device and the network device, and / or

[0412] The terminal device deactivates the first connection.

[0413] In some embodiments, the terminal device may be a remote terminal, or an anchor UE.

[0414] In some embodiments, releasing the first connection may be determined by the terminal device, or may be determined by the network device.

[0415] For example, the terminal device releases the first connection on its own initiative.

[0416] For another example, the terminal device may release the first connection based on an instruction from the network device.

[0417] In some embodiments, deactivating the first connection may be determined by the terminal device, or may be determined by the network device.

[0418] For example, the terminal device determines to deactivate the first connection on its own.

[0419] For another example, the terminal device may deactivate the first connection based on an instruction from the network device.

[0420] It should be understood that the specific implementation of the method 600 may refer to the related implementation in the method 500, and for the sake of brevity, it will not be repeated here.

[0421] In some embodiments, the first connection is an indirect connection between the terminal device and the network device, and the second connection is a direct connection between the terminal device and the network device; or

[0422] The first connection is a direct connection between the terminal device and the network device, and the second connection is an indirect connection between the terminal device and the network device.

[0423] In some embodiments, the terminal device releases the first connection between the terminal device and the network device, including:

[0424] The terminal device receives eighth indication information sent by the network device, where the eighth indication information is used to release the first connection between the terminal device and the network device.

[0425] In some embodiments, the eighth indication information is used to release at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information used for the first connection.

[0426] In some embodiments, the eighth indication information is carried by a sideline configuration dedicated new radio information element SL-ConfigDescribedNR IE.

[0427] In some embodiments, when the first connection is a non-direct connection between the terminal device and the network device, the eighth indication information is carried by SL-ConfigDed icatedNR IE.

[0428] In some embodiments, the eighth indication information is carried by the secondary cell release list sCellToReleaseListIE and / or the RLC bearer release list rlc-BearerToReleaseListIE.

[0429] In some embodiments, when the first connection is a direct connection between the terminal device and the network device, the eighth indication information is carried by sCellToReleaseListIE and / or rlc-BearerToReleaseListIE.

[0430] In some embodiments, the terminal device releases the first connection between the terminal device and the network device, including:

[0431] The terminal device receives ninth indication information sent by the network device, where the ninth indication information is used to release the primary cell on the first connection.

[0432] In some embodiments, the ninth indication information is carried via radio resource control RRC reconfiguration signaling.

[0433] In some embodiments, the network device deactivating the first connection includes:

[0434] The terminal device receives tenth indication information sent by the network device, where the tenth indication information is used to deactivate configuration information for the first connection.

[0435] In some embodiments, the tenth indication information is used to deactivate at least one of the frequency information, resource information, RLC channel configuration information and adaptation layer configuration information used for the first connection.

[0436] In some embodiments, the tenth indication information is carried via radio resource control RRC signaling and / or media access control MAC control element CE.

[0437] In some embodiments, the terminal device deactivating the first connection includes:

[0438] The terminal device receives the eleventh indication information sent by the network device, where the eleventh indication information is used to deactivate the bandwidth part BWP on the first frequency point, where the first frequency point is the frequency point used for the first connection.

[0439] In some embodiments, the method 600 further includes:

[0440] The terminal device switches the home cell or the primary cell of the terminal device from the first connection to the second connection.

[0441] In some embodiments, the terminal device switches the home cell or the primary cell of the terminal device from the first connection to the second connection, including:

[0442] The terminal device receives twelfth indication information sent by the network device, where the twelfth indication information is used to instruct to switch the home cell or primary cell of the terminal device from the first connection to the second connection.

[0443] In some embodiments, the twelfth indication information is carried by the synchronous reconfiguration ReconfigurationWithSync IE.

[0444] In some embodiments, the method 600 further includes:

[0445] In the case where the ReconfigurationWithSync IE of the network device is not received, the terminal device does not change the home cell or the primary cell of the terminal device.

[0446] Hereinafter, in combination with Embodiment 3 and Embodiment 4, the embodiments of the present application are described from the perspective of the interaction between a remote terminal and a network device, wherein the remote terminal may correspond to the terminal device mentioned above.

[0447] Embodiment 3: The first connection is a direct connection, that is, the connection to be released or the connection to be deactivated is a direct connection.

[0448] For example, before switching, the connection between the terminal device and the network device can be as follows: Figure 3 As shown, after switching, the connection between the terminal device and the network device can be as follows Figure 5 or Fig.11 shown.

[0449] like Fig.15 As shown, the following steps may be included:

[0450] S720, the network device sends target indication information to the remote terminal.

[0451] Optionally, the target indication information may include at least one of the aforementioned eighth indication information, ninth indication information, tenth indication information, eleventh indication information, and twelfth indication information.

[0452] In some embodiments, the network device may use the eighth indication information to release the direct connection.

[0453] In some embodiments, the eighth indication information is carried by sCellToReleaseList IE and / or rlc-BearerToReleaseList IE.

[0454] In some embodiments, the network device uses the ninth indication information to release the primary cell or the belonging cell on the direct connection, or switches the belonging cell or the primary cell of the terminal device from a direct connection to an indirect connection to release the direct connection.

[0455] In some embodiments, the ninth indication information is carried via RRCReconfiguration.

[0456] In some embodiments, the network device may use the tenth indication information to deactivate the direct connection.

[0457] As an example but not limitation, the tenth indication information is carried by RRC signaling and / or MAC CE

[0458] In some embodiments, the network device may use the eleventh indication information to indicate deactivation of the BWP corresponding to the frequency point on the direct connection.

[0459] In some embodiments, the network device may use the twelfth indication information to switch the home cell or the primary cell of the terminal device from a direct connection to an indirect connection.

[0460] Embodiment 4: The first connection is an indirect connection, that is, the connection to be released or the connection to be deactivated is an indirect connection.

[0461] For example, before switching, the connection between the terminal device and the network device can be as follows: Figure 3 As shown, after switching, the connection between the terminal device and the network device can be as follows Figure 4 or Fig.10 shown.

[0462] like Fig.16As shown, the following steps may be included:

[0463] S730, the network device sends target indication information to the remote terminal.

[0464] Optionally, the target indication information may include at least one of the aforementioned eighth indication information, ninth indication information, tenth indication information, eleventh indication information, and twelfth indication information.

[0465] In some embodiments, the network device may use the eighth indication information to release the indirect connection.

[0466] In some embodiments, the eighth indication information is carried by SL-ConfigDed icatedNR IE.

[0467] In some embodiments, the network device uses the ninth indication information to release the primary cell or the belonging cell on the non-direct connection, or switches the belonging cell or the primary cell of the terminal device from the non-direct connection to the direct connection to release the non-direct connection.

[0468] In some embodiments, the ninth indication information is carried via RRCReconfiguration.

[0469] In some embodiments, the network device may use the tenth indication information to deactivate the indirect connection.

[0470] As an example but not limitation, the tenth indication information is carried by RRC signaling and / or MAC CE

[0471] In some embodiments, the network device may use the eleventh indication information to indicate deactivation of the BWP corresponding to the frequency point on the indirect connection.

[0472] In some embodiments, the network device may use the twelfth indication information to switch the home cell or the primary cell of the terminal device from a non-direct connection to a direct connection.

[0473] In summary, in an embodiment of the present application, when a terminal device and a network device have a first connection and a second connection, switching from multiple connections to a single connection between the terminal device and the network device can be achieved by releasing or deactivating one of the connections.

[0474] Combination of the above Figures 6 to 16 , describes in detail the method embodiment of the present application, and the following is combined with Figures 17 to 25 , the device embodiments of the present application are described in detail. It should be understood that the device embodiments and the method embodiments correspond to each other, and similar descriptions can refer to the method embodiments.

[0475] Fig.17FIG. 1 shows a schematic block diagram of a network device 1000 according to an embodiment of the present application. The network device and the terminal device have a first connection, such as Fig.17 As shown, the network device 1000 includes:

[0476] The communication unit 1010 is used to send first indication information to the terminal device, where the first indication information is used to add a second connection between the terminal device and the network device.

[0477] In some embodiments, the first indication information is carried by a sideline configuration dedicated new radio information element SL-ConfigDescribedNR IE.

[0478] In some embodiments, the first indication information is used to indicate at least one of the following information:

[0479] Frequency information, resource information, radio link control RLC channel configuration information, and adaptation layer configuration information used for the second connection.

[0480] In some embodiments, the communication unit 1010 is further configured to:

[0481] Send second indication information to the terminal device, where the second indication information is used to switch the home cell or the primary cell of the terminal device from the first connection to the second connection.

[0482] In some embodiments, the second indication information is carried by synchronous reconfiguration ReconfigurationWithSync IE.

[0483] In some embodiments, the communication unit 1010 is further configured to:

[0484] Send third indication information to the terminal device, where the third indication information is used to configure the cell corresponding to the frequency point on the first connection as a secondary cell.

[0485] In some embodiments, the communication unit 1010 is further configured to:

[0486] Send fourth indication information to the terminal device, where the fourth indication information is used to determine an association relationship between the bearer between the terminal device and the network device and the connection between the terminal device and the network device.

[0487] In some embodiments, the fourth indication information is used to indicate at least one of the following:

[0488] The first bearer between the terminal device and the network device is associated with the RLC entity and / or the adaptation layer entity on the first connection;

[0489] The first bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the first connection;

[0490] The second bearer between the terminal device and the network device is associated with the RLC entity and / or the adaptation layer entity on the second connection;

[0491] The second bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the second connection.

[0492] In some embodiments, the network device further includes:

[0493] A processing unit is used for not changing the home cell or the primary cell of the terminal device.

[0494] In some embodiments, the communication unit 1010 is further configured to:

[0495] If the home cell or the primary cell of the terminal device is not changed, the ReconfigurationWithSync IE is not sent to the terminal device.

[0496] In some embodiments, the network device further includes:

[0497] A processing unit, used for not releasing at least one of the frequency point information, resource information and RLC channel configuration information used for the first connection.

[0498] In some embodiments, the first connection is a direct connection between the terminal device and the network device, and the second connection is an indirect connection between the terminal device and the network device.

[0499] In some embodiments, the communication unit 1010 is further configured to:

[0500] The network device sends identification information of the relay terminal and / or timer related information to the terminal device.

[0501] In some embodiments, the timer-related information is used to control establishment of the second connection.

[0502] In some embodiments, the identification information and / or timer-related information of the relay terminal is included in the ReconfigurationWithSync IE.

[0503] In some embodiments, the identification information and / or timer-related information of the relay terminal are not included in the ReconfigurationWithSync IE.

[0504] In some embodiments, the communication unit 1010 is further configured to:

[0505] The network device sends fifth indication information to the terminal device, where the fifth indication information is used to indicate at least one of the following:

[0506] retaining an access layer configuration on the direct connection;

[0507] An access layer configuration is established on the indirect connection.

[0508] In some embodiments, the first connection is an indirect connection between the terminal device and the network device, and the second connection is a direct connection between the terminal device and the network device.

[0509] In some embodiments, the communication unit 1010 is further configured to:

[0510] The network device sends sixth indication information to the terminal device, where the sixth indication information is used to indicate at least one of the following:

[0511] establishing an access layer configuration on the direct connection;

[0512] The access layer configuration on the indirect connection is retained.

[0513] In some embodiments, the access layer configuration on the direct connection includes at least one of the following:

[0514] The RLC channel and cell related configuration on the direct connection.

[0515] In some embodiments, the access layer configuration on the indirect connection includes at least one of the following:

[0516] The RLC channel, adaptation layer entity, and frequency-related configurations on the indirect connection.

[0517] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0518] It should be understood that the network device 1000 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the network device 1000 are respectively to implement Figures 6 to 8 For the sake of brevity, the corresponding processes of the network device in the method 200 are not described in detail here.

[0519] Fig.18FIG. 1 shows a schematic block diagram of a terminal device 1100 according to an embodiment of the present application. The terminal device and the network device have a first connection, such as Fig.18 As shown, the terminal device 1100 includes:

[0520] The communication unit 1110 is used to receive first indication information sent by the network device, where the first indication information is used to add a second connection between the terminal device and the network device.

[0521] In some embodiments, the first indication information is carried by a sideline configuration dedicated new radio information element SL-ConfigDescribedNR IE.

[0522] In some embodiments, the first indication information is used to indicate at least one of the following information:

[0523] Frequency information, resource information, radio link control RLC channel configuration information, and adaptation layer configuration information used for the second connection.

[0524] In some embodiments, the communication unit 1110 is further configured to:

[0525] Receive second indication information sent by the network device, where the second indication information is used to switch the home cell or primary cell of the terminal device from the first connection to the second connection.

[0526] In some embodiments, the second indication information is carried by synchronous reconfiguration ReconfigurationWithSync IE.

[0527] In some embodiments, the communication unit 1110 is further configured to:

[0528] Receive third indication information sent by the network device, where the third indication information is used to configure a cell corresponding to the frequency point on the first connection as a secondary cell.

[0529] In some embodiments, the communication unit 1110 is further configured to:

[0530] Receive fourth indication information sent by the network device, where the fourth indication information is used to determine a mapping relationship between the bearer between the terminal device and the network device and the connection between the terminal device and the network device.

[0531] In some embodiments, the fourth indication information is used to indicate at least one of the following:

[0532] The first bearer between the terminal device and the network device is associated with the RLC entity and / or the adaptation layer entity on the first connection;

[0533] The first bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the first connection;

[0534] The second bearer between the terminal device and the network device is associated with the RLC entity and / or the adaptation layer entity on the second connection;

[0535] The second bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the second connection.

[0536] In some embodiments, the terminal device further includes:

[0537] A processing unit is used to determine not to change the home cell or the primary cell of the terminal device when the ReconfigurationWithSync IE sent by the network device is not received.

[0538] In some embodiments, the first connection is a direct connection between the terminal device and the network device, and the second connection is an indirect connection between the terminal device and the network device.

[0539] In some embodiments, the communication unit 1110 is further configured to:

[0540] Receive identification information of the relay terminal and / or timer related information sent by the network device.

[0541] In some embodiments, the timer-related information is used to control establishment of the second connection.

[0542] In some embodiments, the identification information and / or timer-related information of the relay terminal is included in the ReconfigurationWithSync IE.

[0543] In some embodiments, the identification information and / or timer-related information of the relay terminal are not included in the ReconfigurationWithSync IE.

[0544] In some embodiments, the communication unit 1110 is further configured to:

[0545] Receive fifth indication information sent by the network device, where the fifth indication information is used to indicate at least one of the following:

[0546] retaining an access layer configuration on the direct connection;

[0547] An access layer configuration is established on the indirect connection.

[0548] In some embodiments, the first connection is an indirect connection between the terminal device and the network device, and the second connection is a direct connection between the terminal device and the network device.

[0549] In some embodiments, the communication unit 1110 is further configured to:

[0550] Receive sixth indication information sent by the network device, where the sixth indication information is used to indicate at least one of the following:

[0551] establishing an access layer configuration on the direct connection;

[0552] The access layer configuration on the indirect connection is retained.

[0553] In some embodiments, the access layer configuration on the direct connection includes at least one of the following:

[0554] The RLC channel and cell related configuration on the direct connection.

[0555] In some embodiments, the access layer configuration on the indirect connection includes at least one of the following:

[0556] The RLC channel, adaptation layer entity, and frequency-related configurations on the indirect connection.

[0557] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0558] It should be understood that the terminal device 1100 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 1100 are respectively to implement Figures 6 to 8 For the sake of brevity, the corresponding processes of the terminal device in the method 200 are not repeated here.

[0559] Fig.19 FIG. 1 shows a schematic block diagram of a network device 1200 according to an embodiment of the present application. The network device and the terminal device have a first connection and a second connection, and the second connection is in a deactivated state. Fig.19 As shown, the network device 1200 includes:

[0560] The processing unit 1210 is configured to activate the second connection.

[0561] In some embodiments, the first connection is an indirect connection between the terminal device and the network device, and the second connection is a direct connection between the terminal device and the network device; or

[0562] The first connection is a direct connection between the terminal device and the network device, and the second connection is an indirect connection between the terminal device and the network device.

[0563] In some embodiments, the network device further includes:

[0564] A communication unit is used to send seventh indication information to the terminal device, and the seventh indication information is used to activate the second connection.

[0565] In some embodiments, the seventh indication information is used to activate at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information for the second connection.

[0566] In some embodiments, the seventh indication information is carried via radio resource control RRC signaling and / or media access control MAC control element CE.

[0567] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0568] It should be understood that the network device 1200 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the network device 1200 are respectively to implement Figures 9 to 11 For the sake of brevity, the corresponding processes of the network device in the method 300 are not repeated here.

[0569] Fig. 20 1 shows a schematic block diagram of a terminal device 1300 according to an embodiment of the present application. There is a first connection and a second connection between the terminal device and the network device, and the second connection is in a deactivated state. Fig. 20 As shown, the terminal device 1300 includes:

[0570] The processing unit 1310 is configured to activate the second connection.

[0571] In some embodiments, the first connection is an indirect connection between the terminal device and the network device, and the second connection is a direct connection between the terminal device and the network device; or

[0572] The first connection is a direct connection between the terminal device and the network device, and the second connection is an indirect connection between the terminal device and the network device.

[0573] In some embodiments, the terminal device further includes:

[0574] A communication unit is used to receive seventh indication information sent by the network device, where the seventh indication information is used to activate the second connection.

[0575] In some embodiments, the seventh indication information is used to activate at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information for the second connection.

[0576] In some embodiments, the seventh indication information is carried via radio resource control RRC signaling and / or media access control MAC control element CE.

[0577] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0578] It should be understood that the terminal device 1300 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 1300 are respectively to implement Fig.12 For the sake of brevity, the corresponding processes of the terminal device in the method 400 are not repeated here.

[0579] Fig.21 FIG. 1 shows a schematic block diagram of a network device 1400 according to an embodiment of the present application. The network device and the terminal device have a first connection and a second connection, such as Fig.21 As shown, the network device 1400 includes:

[0580] The processing unit 1410 is used to release the first connection between the terminal device and the network device, and / or deactivate the first connection.

[0581] In some embodiments, the first connection is an indirect connection between the terminal device and the network device, and the second connection is a direct connection between the terminal device and the network device; or

[0582] The first connection is a direct connection between the terminal device and the network device, and the second connection is an indirect connection between the terminal device and the network device.

[0583] In some embodiments, the network device further includes:

[0584] A communication unit is used to send eighth indication information to the terminal device, and the eighth indication information is used to release the first connection between the terminal device and the network device.

[0585] In some embodiments, the eighth indication information is used to release at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information used for the first connection.

[0586] In some embodiments, the eighth indication information is carried by a sideline configuration dedicated new radio information element SL-ConfigDescribedNR IE.

[0587] In some embodiments, when the first connection is a non-direct connection between the terminal device and the network device, the network device releases the non-direct connection between the terminal device and the network device through the SL-ConfigDescribedNR IE.

[0588] In some embodiments, the eighth indication information is carried by a secondary cell release list sCellToReleaseListIE and / or an RLC bearer release list rlc-BearerToReleaseListIE.

[0589] In some embodiments, when the first connection is a direct connection between the terminal device and the network device, the network device releases the direct connection between the terminal device and the network device through the secondary cell release list sCellToReleaseList IE and / or the RLC bearer release list rlc-BearerToReleaseList IE.

[0590] In some embodiments, the network device further includes:

[0591] A communication unit is used to send ninth indication information to the terminal device, and the ninth indication information is used to release the primary cell on the first connection.

[0592] In some embodiments, the ninth indication information is carried via radio resource control RRC reconfiguration signaling.

[0593] In some embodiments, the network device further includes:

[0594] A communication unit is used to send tenth indication information to the terminal device, where the tenth indication information is used to deactivate configuration information for the first connection.

[0595] In some embodiments, the tenth indication information is used to deactivate at least one of the frequency information, resource information, RLC channel configuration information and adaptation layer configuration information used for the first connection.

[0596] In some embodiments, the tenth indication information is carried via radio resource control RRC signaling and / or media access control MAC control element CE.

[0597] In some embodiments, the network device further includes:

[0598] A communication unit is used to send eleventh indication information to the terminal device, where the eleventh indication information is used to deactivate a bandwidth part BWP on a first frequency point, where the first frequency point is a frequency point used for the first connection.

[0599] In some embodiments, the processing unit 1410 is further configured to:

[0600] Switch the home cell or primary cell of the terminal device from the first connection to the second connection.

[0601] In some embodiments, the network device further includes:

[0602] A communication unit is used to send twelfth indication information to the terminal device, and the twelfth indication information is used to instruct to switch the home cell or the primary cell of the terminal device from the first connection to the second connection.

[0603] In some embodiments, the twelfth indication information is carried by the synchronous reconfiguration ReconfigurationWithSync IE.

[0604] In some embodiments, the processing unit 1410 is further configured to:

[0605] The home cell or primary cell of the terminal device is not changed.

[0606] In some embodiments, the network device further includes:

[0607] A communication unit is used for not sending a ReconfigurationWithSync IE to the terminal device without changing the home cell or the primary cell of the terminal device.

[0608] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0609] It should be understood that the network device 1400 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the network device 1400 are respectively to implement Figures 13 to 16 For the sake of brevity, the corresponding processes of the network device in the method 500 are not repeated here.

[0610] Fig. 22 1 shows a schematic block diagram of a terminal device 1500 according to an embodiment of the present application. In the embodiment, the terminal device and the network device have a first connection and a second connection, such as Fig. 22 As shown, the terminal device 1500 includes:

[0611] The processing unit 1510 is configured to release the first connection between the terminal device and the network device, and / or

[0612] Deactivate the first connection.

[0613] In some embodiments, the first connection is an indirect connection between the terminal device and the network device, and the second connection is a direct connection between the terminal device and the network device; or

[0614] The first connection is a direct connection between the terminal device and the network device, and the second connection is an indirect connection between the terminal device and the network device.

[0615] In some embodiments, the terminal device further includes:

[0616] A communication unit is used to receive eighth indication information sent by the network device, and the eighth indication information is used to release the first connection between the terminal device and the network device.

[0617] In some embodiments, the eighth indication information is used to release at least one of the frequency information, resource information, radio link control RLC channel configuration information and adaptation layer configuration information used for the first connection.

[0618] In some embodiments, the eighth indication information is carried by a sideline configuration dedicated new radio information element SL-ConfigDescribedNR IE.

[0619] In some embodiments, when the first connection is a non-direct connection between the terminal device and the network device, the eighth indication information is carried by SL-ConfigDed icatedNR IE.

[0620] In some embodiments, the eighth indication information is carried by the secondary cell release list sCellToReleaseListIE and / or the RLC bearer release list rlc-BearerToReleaseListIE.

[0621] In some embodiments, when the first connection is a direct connection between the terminal device and the network device, the eighth indication information is carried by sCellToReleaseListIE and / or rlc-BearerToReleaseListIE.

[0622] In some embodiments, the terminal device further includes:

[0623] A communication unit is used to receive ninth indication information sent by the network device, where the ninth indication information is used to release the primary cell on the first connection.

[0624] In some embodiments, the ninth indication information is carried via radio resource control RRC reconfiguration signaling.

[0625] In some embodiments, the terminal device further includes:

[0626] A communication unit is used to receive tenth indication information sent by the network device, where the tenth indication information is used to deactivate configuration information for the first connection.

[0627] In some embodiments, the tenth indication information is used to deactivate at least one of the frequency information, resource information, RLC channel configuration information and adaptation layer configuration information used for the first connection.

[0628] In some embodiments, the tenth indication information is carried via radio resource control RRC signaling and / or media access control MAC control element CE.

[0629] In some embodiments, the terminal device further includes:

[0630] The communication unit is used to receive eleventh indication information sent by the network device, where the eleventh indication information is used to deactivate a bandwidth part BWP on a first frequency point, where the first frequency point is a frequency point used for the first connection.

[0631] In some embodiments, the processing unit 1510 is further configured to:

[0632] Switch the home cell or primary cell of the terminal device from the first connection to the second connection.

[0633] In some embodiments, the terminal device further includes:

[0634] A communication unit is used to receive twelfth indication information sent by the network device, and the twelfth indication information is used to indicate that the home cell or primary cell of the terminal device is switched from the first connection to the second connection.

[0635] In some embodiments, the twelfth indication information is carried by the synchronous reconfiguration ReconfigurationWithSync IE.

[0636] In some embodiments, the processing unit 1510 is further configured to:

[0637] In the case where the ReconfigurationWithSync IE of the network device is not received, the terminal device does not change the home cell or the primary cell of the terminal device.

[0638] Optionally, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0639] It should be understood that the terminal device 1500 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 1500 are respectively to implement Figures 13 to 16 For the sake of brevity, the corresponding processes of the terminal device in the method 600 are not repeated here.

[0640] Fig.23 It is a schematic structural diagram of a communication device 1600 provided in an embodiment of the present application. Fig.23 The communication device 1600 shown includes a processor 1610, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0641] Alternatively, if Fig.23 As shown, the communication device 1600 may further include a memory 1620. The processor 1610 may call and run a computer program from the memory 1620 to implement the method in the embodiment of the present application.

[0642] The memory 1620 may be a separate device independent of the processor 1610 , or may be integrated into the processor 1610 .

[0643] Alternatively, if Fig.23 As shown, the communication device 1600 may further include a transceiver 1630, and the processor 1610 may control the transceiver 1630 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0644] The transceiver 1630 may include a transmitter and a receiver. The transceiver 1630 may further include an antenna, and the number of antennas may be one or more.

[0645] Optionally, the communication device 1600 may specifically be a network device of an embodiment of the present application, and the communication device 1600 may implement corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0646] Optionally, the communication device 1600 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 1600 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0647] Fig.24 It is a schematic structural diagram of the chip of an embodiment of the present application. Fig.24 The chip 1700 shown includes a processor 1710, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0648] Alternatively, if Fig.24 As shown, the chip 1700 may further include a memory 1720. The processor 1710 may call and run a computer program from the memory 1720 to implement the method in the embodiment of the present application.

[0649] The memory 1720 may be a separate device independent of the processor 1710 , or may be integrated into the processor 710 .

[0650] Optionally, the chip 1700 may further include an input interface 1730. The processor 1710 may control the input interface 1730 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0651] Optionally, the chip 1700 may further include an output interface 1740. The processor 1710 may control the output interface 1740 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0652] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0653] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0654] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0655] Fig.25 1 is a schematic block diagram of a communication system 1800 provided in an embodiment of the present application. Fig.25 As shown, the communication system 1800 includes a terminal device 1810 and a network device 1820 .

[0656] Among them, the terminal device 1810 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1820 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not repeated here.

[0657] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. 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.

[0658] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0659] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments 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 link 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 embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0660] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0661] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0662] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0663] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0664] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0665] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0666] The embodiment of the present application also provides a computer program.

[0667] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods in the embodiments of the present application. For the sake of brevity, they are not described here.

[0668] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0669] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0670] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0671] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0672] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple 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.

[0673] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0674] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0675] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: Applied to a network device, wherein there is a first connection between the network device and a terminal device, the method comprising: The network device sends first indication information to the terminal device, where the first indication information is used to add a second connection between the terminal device and the network device.

2. The method according to claim 1, characterized in that The first indication information is used to indicate at least one of the following information: Frequency information and resource information used for the second connection.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: The network device sends second indication information to the terminal device, where the second indication information is used to switch the primary cell of the terminal device from the first connection to the second connection.

4. The method according to claim 3, characterized in that The second indication information is carried by the synchronous reconfiguration ReconfigurationWithSync IE.

5. The method according to any one of claims 1 to 4, characterized in that The method further comprises: The network device sends fourth indication information to the terminal device, where the fourth indication information is used to determine an association relationship between the bearer between the terminal device and the network device and the connection between the terminal device and the network device.

6. The method according to claim 5, characterized in that The fourth indication information is used to indicate at least one of the following: The first bearer between the terminal device and the network device is associated with the RLC entity and / or the adaptation layer entity on the first connection; The first bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the first connection; The second bearer between the terminal device and the network device is associated with the RLC entity and / or the adaptation layer entity on the second connection; The second bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the second connection.

7. The method according to claim 1 or 2, characterized in that: The method further comprises: The network device does not change the primary cell of the terminal device.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: The network device sends identification information of the relay terminal and / or timer related information to the terminal device.

9. The method according to claim 8, characterized in that The timer related information is used to control the establishment of the second connection.

10. The method according to claim 8 or 9, characterized in that: The identification information and / or timer-related information of the relay terminal are not included in the ReconfigurationWithSync IE.

11. The method according to any one of claims 1 to 10, characterized in that The first connection is a direct connection between the terminal device and the network device, and the second connection is an indirect connection between the terminal device and the network device.

12. The method according to any one of claims 1 to 10, characterized in that The first connection is an indirect connection between the terminal device and the network device, and the second connection is a direct connection between the terminal device and the network device.

13. The method according to claim 12, characterized in that The method further comprises: The network device sends sixth indication information to the terminal device, where the sixth indication information is used to indicate at least one of the following: establishing an access layer configuration on the direct connection; The access layer configuration on the indirect connection is retained.

14. A wireless communication method, characterized in that: Applied to a terminal device, wherein there is a first connection between the terminal device and a network device, the method comprising: The terminal device receives first indication information sent by the network device, where the first indication information is used to add a second connection between the terminal device and the network device.

15. The method according to claim 14, characterized in that The first indication information is used to indicate at least one of the following information: Frequency information and resource information used for the second connection.

16. The method according to claim 14 or 15, characterized in that The method further comprises: The terminal device receives second indication information sent by the network device, where the second indication information is used to switch the primary cell of the terminal device from the first connection to the second connection.

17. The method according to claim 16, characterized in that The second indication information is carried by the synchronous reconfiguration ReconfigurationWithSync IE.

18. The method according to any one of claims 14 to 17, characterized in that: The method further comprises: The terminal device receives fourth indication information sent by the network device, where the fourth indication information is used to determine a mapping relationship between the bearer between the terminal device and the network device and the connection between the terminal device and the network device.

19. The method according to claim 18, characterized in that The fourth indication information is used to indicate at least one of the following: The first bearer between the terminal device and the network device is associated with the RLC entity and / or the adaptation layer entity on the first connection; The first bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the first connection; The second bearer between the terminal device and the network device is associated with the RLC entity and / or the adaptation layer entity on the second connection; The second bearer between the terminal device and the network device is no longer associated with the RLC entity and / or the adaptation layer entity on the second connection.

20. The method according to claim 14 or 15, characterized in that The method further comprises: When the terminal device does not receive the ReconfigurationWithSync IE sent by the network device, the terminal device determines not to change the primary cell of the terminal device.

21. The method according to any one of claims 14 to 20, characterized in that The method further comprises: The terminal device receives the identification information of the relay terminal and / or timer related information sent by the network device.

22. The method according to claim 21, characterized in that The timer related information is used to control the establishment of the second connection.

23. The method according to claim 21 or 22, characterized in that The identification information and / or timer-related information of the relay terminal are not included in the ReconfigurationWithSync IE.

24. The method according to any one of claims 14 to 23, characterized in that The first connection is a direct connection between the terminal device and the network device, and the second connection is an indirect connection between the terminal device and the network device.

25. The method according to any one of claims 14 to 23, characterized in that The first connection is an indirect connection between the terminal device and the network device, and the second connection is a direct connection between the terminal device and the network device.

26. The method according to claim 25, characterized in that The method further comprises: The terminal device receives sixth indication information sent by the network device, where the sixth indication information is used to indicate at least one of the following: establishing an access layer configuration on the direct connection; The access layer configuration on the indirect connection is retained.

27. A network device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 13.

28. A terminal device, characterized in that: include: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method as claimed in any one of claims 14 to 26.

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