Wireless communication method, terminal equipment and network equipment

Abstract

Provided are a wireless communication method, a terminal device and a network device, the method comprising: a terminal device receiving first information sent by a network device, the first information being used for indicating a first resource, the first resource being associated with a first synchronization signal block SSB. The first information is also used for indicating a second resource, and the second resource is associated with a second SSB. According to the embodiment of the invention, the resource (namely the first resource and / or the second resource) associated with the SSB (the first SSB and / or the second SSB) is indicated through the first information, so that the terminal equipment can obtain and send the uplink synchronization between the TRP of the first SSB according to the indicated first resource; and / or, uplink synchronization between the TRP of the second SSB can be obtained and sent according to the indicated second resource.

Description

Wireless communication method, terminal equipment and network equipment Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a method, terminal device and network device for wireless communication. Background Art

[0002] In a scenario with multiple transmitting and receiving points (TRPs), how to determine the resources corresponding to different TRPs is an urgent problem to be solved.

[0003] Summary of the Invention

[0004] The present application provides a communication method, a network device, and a terminal device. The following introduces various aspects of the present application.

[0005] In a first aspect, a method for wireless communication is provided, the method comprising: a terminal device receives first information sent by a network device, the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

[0006] In a second aspect, a method for wireless communication is provided, the method comprising: a network device sends first information to a terminal device, the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

[0007] In a third aspect, a terminal device is provided, including: a receiving unit for receiving first information sent by a network device, wherein the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

[0008] In a fourth aspect, a network device is provided, including: a sending unit, used to send first information to a terminal device, wherein the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

[0009] In the fifth aspect, a terminal device is provided, comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0010] In the sixth aspect, a network device is provided, comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the communication system may also include other devices that interact with the terminal device or network device in the solution provided in the embodiment of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a terminal device or a network device to execute part or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a terminal device or a network device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0014] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] In some cases, TRP can be associated with a synchronization signal / physical broadcast channel signal block (synchronization signal and PBCH block, SSB), such as a terminal device can determine the corresponding TRP based on the received SSB. Therefore, the embodiment of the present application indicates the resources (i.e., the first resources) associated with the SSB (first SSB) through the first information, and can determine the resources corresponding to the TRP associated with the first SSB, which helps the terminal device determine the resources corresponding to different TRPs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 1A to 1C are system architecture diagrams of a communication system to which embodiments of the present application may be applied.

[0017] FIG2 is a flow chart of a four-step random access process.

[0018] FIG3 is an example diagram showing the relationship between uplink frames and downlink frames in a TA scenario.

[0019] FIG4 is a flow chart of a wireless communication method provided in an embodiment of the present application.

[0020] FIG5 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0021] FIG6 is a schematic diagram of the structure of a network device provided in an embodiment of the present application.

[0022] FIG7 is a schematic structural diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solution in this application will be described below with reference to the accompanying drawings.

[0024] Communication system architecture

[0025] 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, evolution system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, non-terrestrial networks (NTN) system, universal mobile telecommunication system (UMTS), wireless local area networks (WLAN), wireless fidelity (WLAN), etc. fidelity, WiFi), fifth-generation communication (5G) systems or other communication systems, such as future communication systems, such as sixth-generation mobile communication systems, and satellite communication systems.

[0026] 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 (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, and the embodiments of the present application can also be applied to these communication systems.

[0027] The communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0028] The communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where 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, where the authorized spectrum can also be considered as a dedicated spectrum.

[0029] The embodiments of the present application can be applied to NTN systems as well as terrestrial networks (TN) systems. As an example and not a limitation, NTN systems include NR-based NTN systems and IoT-based NTN systems.

[0030] The embodiments of the present application describe various embodiments in conjunction with network devices and terminal devices, where the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0031] In an embodiment of the present application, the terminal device may 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 capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a next-generation communication system such as a terminal device in an NR network, or a terminal device in a future-evolved public land mobile network (PLMN) network, etc.

[0032] In an embodiment of the present application, a terminal device may be a device that provides voice and / or data connectivity to a user and can be used to connect people, objects, and machines, such as a handheld device with wireless connection capabilities, an in-vehicle device, etc. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the terminal device can be used to act as a base station. For example, the terminal device can act as a scheduling entity that provides sidelink signals between terminal devices in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. Cellular phones and smart home devices communicate with each other without relaying the communication signal through a base station.

[0033] In an embodiment 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 (such as airplanes, balloons and satellites, etc.).

[0034] In the embodiments of the present application, the terminal device may 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. The terminal device involved in the embodiments of the present application may also be referred to as a terminal, user equipment (UE), an access terminal device, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE device, etc. The terminal device may also be fixed or mobile.

[0035] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called 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 achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those 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 smart bracelets and smart jewelry for vital sign monitoring.

[0036] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station may broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station may also refer to a communication module, modem or chip used to be set in the aforementioned device or apparatus. The base station may also be a mobile switching center and a device to device D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communication device that performs the base station function, a network side device in a 6G network, a device that performs the base station function in a future communication system, etc. The base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.

[0037] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0038] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may also include an AAU.

[0039] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld, wearable, or in vehicles; they can also be deployed on water (such as ships); they can also be deployed in the air (such as aircraft, balloons, and satellites). The embodiments of this application do not limit the scenarios in which network devices and terminal devices are located.

[0040] As an example and not a limitation, in an embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. In some embodiments of the present application, 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. In some embodiments of the present application, the network device may also be a base station set up in a location such as land or water.

[0041] 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). 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.

[0042] For example, Figure 1A is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. As shown in Figure 1A, the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or also referred to as a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices located within the coverage area.

[0043] Figure 1A exemplarily shows a network device and two terminal devices. In some embodiments of the present application, the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0044] For example, FIG1B is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application. Referring to FIG1B , the communication system includes a terminal device 120 and a satellite 110a, and wireless communication can be performed between the terminal device 120 and the satellite 110a. The network formed between the terminal device 120 and the satellite 110a can also be referred to as an NTN. In the architecture of the communication system shown in FIG1B , the satellite 110a can have the function of a base station, and the terminal device 120 and the satellite 110a can communicate directly. In this communication system architecture, the satellite 110a can be referred to as a network device. In some embodiments, the communication system can include multiple network devices 110a, and each network device 110a can include a different number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0045] For example, FIG1C is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application. Referring to FIG1C , the communication system includes a terminal device 120, a satellite 130, and a base station 110b. Wireless communication can be performed between the terminal device 120 and the satellite 130, and communication can be performed between the satellite 130 and the base station 110b. The network formed between the terminal device 120, the satellite 130, and the base station 110b can also be referred to as an NTN. In the architecture of the communication system shown in FIG1C , the satellite 130 may not have the function of a base station, and the communication between the terminal device 120 and the base station 110b needs to be relayed through the satellite 130. In this system architecture, the base station 110b can be referred to as a network device. In some embodiments of the present application, the communication system may include multiple network devices 110b, and each network device 110b may include a different number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0046] It should be noted that Figures 1A-1C are only examples of the system to which this application is applicable. Of course, the method shown in the embodiment of this application can also be applied to other systems, such as 5G communication systems, LTE communication systems, etc., and the embodiment of this application does not make specific limitations on this.

[0047] In some embodiments of the present application, the wireless communication system shown in Figures 1A-1C may also include other network entities such as a mobility management entity (MME) and an access and mobility management function (AMF), but the embodiments of the present application are not limited to this.

[0048] It should be understood that in the embodiments of the present application, a device having a communication function in a network / system may be referred to as a communication device. Taking the communication system 100 shown in FIG1A as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function. The network device 110 and the terminal device 120 may be the specific devices described above and will not be described in detail here. The communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in the embodiments of the present application.

[0049] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" 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 between A and B.

[0050] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0051] The “configuration” in the embodiment of the present application may include configuration through at least one of system messages, radio resource control (RRC) signaling and media access control element (MAC CE).

[0052] In some embodiments of the present application, "predefined" or "preset" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device or a network device). The present application does not limit the specific implementation method. For example, predefined may refer to information defined in a protocol.

[0053] In some embodiments of the present application, the "protocol or standard" may refer to a standard protocol in the field of communications, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0054] For ease of understanding, some relevant technical knowledge involved in the embodiments of this application is first introduced. The following related technologies can be combined with the technical solutions of the embodiments of this application as optional solutions, and they all fall within the scope of protection of the embodiments of this application. The embodiments of this application include at least part of the following contents.

[0055] Random access process

[0056] The terminal device can establish a connection with the cell and obtain uplink synchronization information by initiating a random access process. The random access process can be triggered in a variety of ways. For example, the random access process can be triggered by a physical downlink control channel (PDCCH) order, and the network device can use this order to tell the terminal device that it needs to re-initiate random access. For another example, the random access process can be triggered by the media access control (MAC) sublayer. At this time, the terminal device can select the preamble code to initiate random access. For another example, the random access process can be triggered by the upper layer, such as initial access, RRC connection reconstruction, handover, etc.

[0057] Random access may include contention-based random access and non-contention-based random access (contention-free random access channel, CFRA).

[0058] Contention-based random access may include a four-step random access procedure and a two-step random access procedure. As shown in FIG2 , the four-step random access procedure may include steps S210 to S240.

[0059] In step S210, the terminal device sends a random access request to the network device. The random access request may include a random access preamble. The random access request may also be referred to as the first message or message 1 (Msg1) in the random access process.

[0060] In step S220, after detecting the random access preamble sent by the terminal device, the network device sends a random access response (RAR) to the terminal device. The RAR message can also be called the second message or message 2 (Msg2) in the random access process.

[0061] In some embodiments, the RAR may include a TAC field to indicate uplink synchronization information between the terminal device and the network device. In this way, the terminal device can obtain an initial TA value through the RAR message during the initial access process.

[0062] In step S230, the terminal device sends Message 3 (Msg3) to the network device. Message 3 can be used to notify the network device of the event that triggered the random access procedure. For example, if the event is the initial random access procedure, Message 3 will carry the terminal device identifier and establishment cause; if the event is RRC reestablishment, it will carry the connected terminal device identifier and establishment cause.

[0063] In step S240, the network device sends message 4 (Msg4) to the terminal device. Message 4 can be used for conflict resolution, and therefore, message 4 can also be called a contention resolution message.

[0064] For non-contention random access, the random access process may include the above steps S210 and S220. In addition, for non-contention random access, message 0 is required before message 1, such as PDCCH order.

[0065] Uplink synchronization

[0066] Uplink synchronization is the process by which uplink signals from terminal devices located at different locations within a serving cell, using the same timeslot, arrive at the network equipment's receiving antenna simultaneously. This means that signals from different terminal devices in the same timeslot arrive at the network equipment's receiving antenna in sync. The purpose of uplink synchronization is to reduce uplink multi-access interference and multipath interference between terminal devices within the serving cell.

[0067] During the uplink synchronization process, the terminal device can perform uplink synchronization with the network device according to the uplink synchronization information corresponding to the network device. The uplink synchronization information may include, for example, a timing advance (TA).

[0068] Timing Advance (TA)

[0069] TA is usually used for uplink transmission, and can refer to the system frame in which the terminal device sends uplink data a certain amount of time ahead of the corresponding downlink frame. For example, the timing advance of the terminal device is based on the first path of the downlink channel received by the terminal device (that is, the first symbol of the time slot where the channel is located) as the downlink reference, and the transmission is carried out in advance on this basis. Figure 3 shows the relationship between the uplink frame and the downlink frame. Referring to Figure 3, taking the terminal device working in the single TRP (single-TRP, sTRP) mode as an example, the reference point of the TA of the terminal device is the downlink reception time point of the terminal device as the starting point, and the uplink channel or signal is sent a certain amount of time (TA) in advance.

[0070] Taking carrier aggregation as an example, a terminal device can support different carriers (also known as "serving cells"). Different carriers can have different TAs, so the concept of a timing advance group (TA group, TAG) is introduced. Generally, a TAG can include the TAs of one or more serving cells.

[0071] In some implementations, the TA adjustment method can be based on the absolute value of the TA (also known as "absolute TA"), and the network device can directly provide an absolute TA through the payload of the absolute MAC CE (Absolute MAC CE) or the MAC random access response (MAC RAR).

[0072] In some scenarios, the above absolute TA and TA acquisition method occur during a random access process.

[0073] Uplink synchronization in multi-TRP scenarios

[0074] The multi-TRP scenario may refer to a scenario in which the service cell configures multiple TRPs for the terminal device.

[0075] As of R17, for a service cell configured with multiple TRPs, the difference in uplink signal propagation time from a terminal device to each TRP cannot be greater than the length of a CP (cyclic prefix), which means that the TA from the terminal device to each TRP is the same.

[0076] In the MIMO discussion of R18, in order to make the distance between the terminal device and the TRP more flexible, the difference in the uplink TA between the terminal device and each TRP is allowed to exceed one CP. That is, the TA of the terminal device to different TRPs can be different and can belong to different TAGs.

[0077] As mentioned above, during random access, the TA can be obtained based on the RAR message. If the TAs from the terminal device to different TRPs are different, the absolute TAs between the terminal device and each TRP can be obtained using the CFRA process triggered by the PDCCH command.

[0078] For example, after receiving the PDCCH command, the terminal device can send a preamble on the indicated PRACH resource according to the physical random access channel (PRACH) resource and dedicated random access resources indicated in the PDCCH command, such as a dedicated preamble and related SSB (also referred to as synchronization signal block). After receiving the preamble, the base station will respond with a message, which may include a RAR unit. The RAR unit may include the absolute TA of the terminal device to the base station estimated based on the received preamble.

[0079] In a multi-TRP scenario, how to determine the resources corresponding to different TRPs is an urgent problem to be solved.

[0080] In some cases, TRP can be associated with SSB, such as the terminal device can determine the corresponding TRP based on the received SSB.

[0081] Therefore, in order to solve the above problems, the embodiment of the present application indicates the resources (i.e., the first resources) associated with the SSB (first SSB) through the first information, which can determine the resources corresponding to the TRP associated with the first SSB, which helps the terminal device to determine the resources corresponding to different TRPs.

[0082] FIG4 is a flow chart of a wireless communication method according to an embodiment of the present application.

[0083] 4 , method 400 may include step S410 .

[0084] In step S410, the terminal device receives first information sent by the network device.

[0085] The terminal device and the network device may be, for example, the terminal device 120 and the network device 110 shown in FIG. 1 (eg, the network device 110 in FIG. 1A , the satellite 110 a in FIG. 1B , and the base station 110 b in FIG. 1C ).

[0086] The first information may be used to indicate a first resource, which may be associated with a first SSB. As described above, if the first resource associated with the first SSB is determined, then the first resource is the resource corresponding to the TRP associated with the first SSB.

[0087] In a current service cell of the terminal device, there may be multiple SSBs associated with the terminal device.

[0088] For example, the SSB associated with a terminal device may include the SSB broadcast by the initial portion of the carrier bandwidth (BWP) in the serving cell, i.e., the cell defining SSB (CD-SSB). In NR, a serving cell may consist of multiple BWPs. The initial BWP may be the BWP that the terminal device initially accesses.

[0089] For another example, the SSB associated with the terminal device may include other SSBs configured for the terminal device in the serving cell. The other SSBs mentioned here may be SSBs associated with additional (or incremental) cell physical identifiers (PCIs).

[0090] Accordingly, in a current service cell of the terminal device, the TRP associated with the terminal device may include multiple TRPs, that is, a multi-TRP scenario. Among them, the TRP associated with the terminal device may include a service TRP and an incremental (additional) TRP. The service TRP may be associated with the CD-SSB (i.e., the second SSB) mentioned above, and the incremental TRP may be associated with the first SSB. In other words, the first SSB may be an SSB other than the second SSB in the service cell, i.e., the other SSBs mentioned above.

[0091] As an implementation method, the first SSB can be one of the other SSBs, that is, resources can be separately configured for each of the other SSBs. If there are N other SSBs, then N resources need to be reserved for each of the N SSBs. At the same time, when the first information is used to indicate the resources associated with the first SSB, at least log2N bits need to be reserved for the first information.

[0092] If N is large, the above method may result in a large resource overhead and signaling overhead for carrying the first information. As another implementation, the first SSB may include multiple SSBs among the above-mentioned other SSBs, that is, the same resources may be configured for the multiple SSBs, thereby helping to reduce resource overhead and signaling overhead for carrying the first information.

[0093] In actual use, the beam can be activated by activating the terminal control interface (TCI) state, so that the SSB referenced by the beam can be implicitly activated, such as the other SSBs mentioned above. However, at the same time, only one SSB can usually be activated by activating the TCI state, that is, at the same time, among the multiple SSBs other than the second SSB in the current service cell of the terminal device, usually only one SSB is in an activated state. Because multiple SSBs other than the second SSB in the current service cell are associated with incremental TRPs. Similarly, at the same time, among the multiple incremental TRPs configured by the terminal device in the current service cell, only one incremental TRP is in an activated state (this TRP can also be called an active TRP).

[0094] Taking the above into account, the first SSB can include all SSBs in the current serving cell except the second SSB. That is, the same set of resources can be configured for all SSBs configured by the terminal device in the current serving cell except the second SSB, thereby further helping to reduce resource overhead and signaling overhead for carrying the first information. For example, the number of reserved resources can be reduced to one set, and the number of reserved bits for signaling carrying the first message can be reduced to 1 bit, which can significantly reduce signaling overhead.

[0095] In addition to the first SSB, the terminal device typically needs to configure resources associated with a second SSB. As an implementation method, the first information can indicate the second resource, which can be associated with the second SSB. Indicating the first and second resources using the same information helps save signaling and facilitates implementation.

[0096] The first information may use a universal identifier or a flag bit to indicate the first resource or the second resource. For example, the first information may indicate both the first resource and the second resource using a single bit. As an example, when the first information is 0, it indicates the first resource, and when the first information is 1, it indicates the second resource. As another example, when the first information is 1, it indicates the first resource, and when the first information is 0, it indicates the second resource. It should be noted that the above examples are provided for illustrative purposes only and are not intended to be limiting in this application.

[0097] As an implementation manner, the mapping relationship between the first information and the first resource and the second resource can be configured through RRC signaling.

[0098] As an implementation method, the first resource and the second resource mentioned above may be random access radio resources (PRACH resources). That is, the first resource may be a random access radio resource associated with the incremental TRP, and the second resource may be a random access radio resource associated with the service TRP.

[0099] As an implementation method, the first resource and the second resource can be used for uplink synchronization of the terminal device in the serving cell. For example, the first resource can be used for uplink synchronization between the terminal device and the TRP that sends the first SSB in the serving cell. For another example, the second resource can be used for uplink synchronization between the terminal device and the TRP that sends the second SSB in the serving cell. The serving cell mentioned here can be a current serving cell of the terminal device.

[0100] Since the first SSB can be associated with the incremental TRP and the second SSB can be associated with the service TRP, that is, the first resource can be used for uplink synchronization between the terminal device and the incremental TRP configured in the current service cell; the second resource can be used for uplink synchronization between the terminal device and the service TRP in the current service cell.

[0101] The first information may be carried in a variety of signaling. As an implementation, the first information may be carried in a physical downlink control channel command.

[0102] The following introduces the wireless communication method provided in an embodiment of the present application by taking the first resource and the second resource for uplink synchronization of a terminal device as an example.

[0103] At the RAN1#112 meeting, RAN1 reached the following conclusions.

[0104] Confirm the following working hypothesis:

[0105] For multi-DCI based inter-cell multi-TRP operation with two TA enhancements, one PRACH configuration is supported for each configured additional PCI;

[0106] Additional PRACH configurations may be used in a random access channel (RACH) procedure, which may be triggered by a PDCCH command of the corresponding configured additional PCI.

[0107] In RAN1#112bis, RAN1 came to the following conclusions:

[0108] For multi-DCI based inter-cell multi-TRP operation with two TA enhancements, the PDCCH command is supported to indicate which PRACH configuration to use in the RACH process.

[0109] It was also proposed in the meeting that further discussion will be held in the future:

[0110] Whether to indicate additional PCI or universal identifier in the PDCCH order;

[0111] Details of the indication in the PDCCH order on whether PRACH triggered by inactive extra PCI is supported.

[0112] Based on this, a PRACH resource can be configured for each TRP associated with a different additional PCI. For example, the above configuration can be performed in RRC signaling.

[0113] The TRP associated with the additional PCI is also referred to as an incremental TRP. As an implementation, each incremental TRP can be indicated by the additional PCI associated with it, such as by its associated additional PCI index (additionalPCIIndex). According to the protocol, the number of additional PCI indexes can be greater than or equal to 1 and less than or equal to 7 (i.e., 7=>additionalPCIIndex>=1). In other words, the number of incremental TRPs can range from 1 to 7.

[0114] In addition, the protocol also configures PRACH resources for the service TRP (ie, the TRP not associated with additionalPCIIndex).

[0115] As an implementation method, additionalPCIIndex can be used to indicate the above two PRACH resources (resources associated with the serving TRP and resources associated with the incremental TRP), where the corresponding parameters of the serving TRP can be set to 0. In this way, after receiving the resource indication, the terminal device can know which PRACH resource to use for the random access process, thereby obtaining uplink synchronization for the corresponding TRP.

[0116] As an implementation method, the resources used by the incremental TRP and the service TRP can be indicated in the PDCCH command.

[0117] As mentioned above, the number of incremental TRPs can range from 1 to 7, which means that in addition to the service TRP, a maximum of 7 sets of PRACH resources need to be configured. If the PRACH resources corresponding to the service and incremental TRPs are indicated in the PDCCH command, at least 3 bits must be reserved in the PDCCH command to distinguish these PRACH resources.

[0118] In some cases, different TRPs may be associated with different SSBs. Thus, the terminal device may determine the TRP based on the received SSB.

[0119] The TRP associated with the SSB broadcast on the initial BWP (which may be referred to as the second SSB) may be the service TRP mentioned above. The SSB broadcast on the initial BWP mentioned here may be a CD-SSB.

[0120] In addition, terminal devices are usually configured with other SSBs for broadcasting different additional PCIs. These other SSBs are associated with different additional PCIs, and different additional PCIs can be associated with multiple incremental TRPs mentioned above. Therefore, other SSBs can be associated with multiple incremental TRPs.

[0121] Based on the above mapping relationship between SSB and TRP, as an implementation method, the resources associated with the TRP corresponding to the SSB can be determined by indicating the resources associated with the SSB. If a set of PRACH resources is configured for each TRP according to the method described above, that is, a set of PRACH resources is configured for each SSB configured by the terminal device in the current serving cell, then at least 3 bits of signaling are required to indicate the resources corresponding to each SSB. In the above method, the overhead of PRACH resources and signaling is relatively large.

[0122] In an embodiment of the present application, a PRACH resource is configured for all SSBs except the second SSB configured for a terminal device in a certain service cell, so that one bit can be used in the signaling carrying the first message to distinguish the second resource associated with the second SSB and the first resource associated with the first SSB.

[0123] That is, a PRACH resource is configured for all incremental TRPs of a certain serving cell, and this PRACH resource only serves the activated incremental TRP. In this way, in the signaling carrying the first message, such as the PDCCH command, one bit can be used to distinguish whether the PDCCH command requires the PRACH resource corresponding to the serving TRP or the PRACH resource corresponding to the activated incremental TRP.

[0124] Through this method, the PRACH resources configured for incremental TRP can be reduced from a maximum of 7 to 1, and the signaling in the PDCCH command is also reduced from 3 bits to 1 bit, reducing the number of resources and the signaling overhead of indicating the resources.

[0125] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 4 . The device embodiment of the present application is described in detail below in conjunction with Figures 5 to 7 . It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0126] FIG5 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. The terminal device 500 shown in FIG5 may include a receiving unit 510.

[0127] The receiving unit 510 is used to receive first information sent by a network device, where the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

[0128] Optionally, the first SSB is configured in a current service cell of the terminal device, and the first SSB includes all SSBs in the service cell except the second SSB.

[0129] Optionally, the second SSB is a cell definition synchronization signal block CD-SSB broadcast on the initial carrier bandwidth BWP in the serving cell.

[0130] Optionally, the first information is also used to indicate a second resource, and the second resource is associated with the second SSB.

[0131] Optionally, the first resource and the second resource are random access wireless resources.

[0132] Optionally, the first resource and the second resource are used for uplink synchronization of the terminal device in the serving cell.

[0133] Optionally, the first resource is used for uplink synchronization between the terminal device and the TRP sending the first SSB in the serving cell.

[0134] Optionally, the second resource is used for uplink synchronization between the terminal device and the TRP sending the second SSB in the serving cell.

[0135] Optionally, the first information is 1 bit.

[0136] Optionally, the first information is carried in a physical downlink control channel PDCCH command.

[0137] FIG6 is a schematic diagram of the structure of a network device according to an embodiment of the present application. The network device 600 shown in FIG6 may include a sending unit 610.

[0138] The sending unit 610 is used to send first information to the terminal device, where the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

[0139] Optionally, the first SSB is configured in a current service cell of the terminal device, and the first SSB includes all SSBs in the service cell except the second SSB.

[0140] Optionally, the second SSB is a cell definition synchronization signal block CD-SSB broadcast on the initial carrier bandwidth BWP in the serving cell.

[0141] Optionally, the first information is also used to indicate a second resource, and the second resource is associated with the second SSB.

[0142] Optionally, the first resource and the second resource are random access wireless resources.

[0143] Optionally, the first resource and the second resource are used for uplink synchronization of the terminal device in the serving cell.

[0144] Optionally, the first resource is used for uplink synchronization between the terminal device and the TRP sending the first SSB in the serving cell.

[0145] Optionally, the second resource is used for uplink synchronization between the terminal device and the TRP sending the second SSB in the serving cell.

[0146] Optionally, the first information is 1 bit.

[0147] Optionally, the first information is carried in a physical downlink control channel PDCCH command.

[0148] FIG7 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in FIG7 indicate that the unit or module is optional. The device 700 may be used to implement the method described in the above method embodiment. The device 700 may be a chip, a terminal device, or a network device.

[0149] The device 700 may include one or more processors 710. The processor 710 may support the device 700 to implement the method described in the method embodiment above. The processor 710 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0150] The apparatus 700 may further include one or more memories 720. The memories 720 store programs that can be executed by the processor 710, causing the processor 710 to perform the methods described in the above method embodiments. The memories 720 may be independent of the processor 710 or integrated into the processor 710.

[0151] The apparatus 700 may further include a transceiver 730. The processor 710 may communicate with other devices or chips via the transceiver 730. For example, the processor 710 may transmit and receive data with other devices or chips via the transceiver 730.

[0152] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0153] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0154] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0155] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0156] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0157] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0158] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0159] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0160] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications 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.

[0161] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related 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 document generally indicates that the related objects are in an "or" relationship.

[0162] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0163] In the several embodiments provided in this 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 merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, 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.

[0164] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0165] 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.

[0166] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0167] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: The terminal device receives first information sent by the network device, where the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

2. The method according to claim 1, characterized in that The first SSB is configured in a current service cell of the terminal device, and the first SSB includes all SSBs in the service cell except the second SSB.

3. The method according to claim 2, characterized in that The second SSB is a cell definition synchronization signal block CD-SSB broadcast on the initial carrier bandwidth BWP in the serving cell.

4. The method according to claim 2 or 3, characterized in that: The first information is also used to indicate a second resource, and the second resource is associated with the second SSB.

5. The method according to claim 4, characterized in that The first resource and the second resource are random access wireless resources.

6. The method according to claim 4 or 5, characterized in that: The first resource and the second resource are used for uplink synchronization of the terminal device in the serving cell.

7. The method according to claim 6, characterized in that The first resource is used for uplink synchronization between the terminal device and the TRP that sends the first SSB in the serving cell.

8. The method according to claim 6, characterized in that The second resource is used for uplink synchronization between the terminal device and the TRP that sends the second SSB in the serving cell.

9. The method according to any one of claims 1 to 8, characterized in that The first information is 1 bit.

10. The method according to any one of claims 1 to 9, characterized in that The first information is carried in a physical downlink control channel PDCCH command.

11. A wireless communication method, characterized in that: include: The network device sends first information to the terminal device, where the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

12. The method according to claim 11, characterized in that The first SSB is configured in a current service cell of the terminal device, and the first SSB includes all SSBs in the service cell except the second SSB.

13. The method according to claim 12, characterized in that The second SSB is a cell definition synchronization signal block CD-SSB broadcast on the initial carrier bandwidth BWP in the serving cell.

14. The method according to claim 12 or 13, characterized in that The first information is also used to indicate a second resource, and the second resource is associated with the second SSB.

15. The method according to claim 14, characterized in that The first resource and the second resource are random access wireless resources.

16. The method according to claim 14 or 15, characterized in that The first resource and the second resource are used for uplink synchronization of the terminal device in the serving cell.

17. The method according to claim 16, characterized in that The first resource is used for uplink synchronization between the terminal device and the TRP that sends the first SSB in the serving cell.

18. The method according to claim 16, characterized in that The second resource is used for uplink synchronization between the terminal device and the TRP that sends the second SSB in the serving cell.

19. The method according to any one of claims 11 to 18, characterized in that The first information is 1 bit.

20. The method according to any one of claims 11 to 19, characterized in that The first information is carried in a physical downlink control channel PDCCH command.

21. A terminal device, characterized in that: include: A receiving unit is used to receive first information sent by a network device, where the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

22. The terminal device according to claim 21, characterized in that: The first SSB is configured in a current service cell of the terminal device, and the first SSB includes all SSBs in the service cell except the second SSB.

23. The terminal device according to claim 22, characterized in that: The second SSB is a cell definition synchronization signal block CD-SSB broadcast on the initial carrier bandwidth BWP in the serving cell.

24. The terminal device according to claim 22 or 23, characterized in that: The first information is also used to indicate a second resource, and the second resource is associated with the second SSB.

25. The terminal device according to claim 24, characterized in that: The first resource and the second resource are random access wireless resources.

26. The terminal device according to claim 24 or 25, characterized in that: The first resource and the second resource are used for uplink synchronization of the terminal device in the serving cell.

27. The method according to claim 26, characterized in that The first resource is used for uplink synchronization between the terminal device and the TRP that sends the first SSB in the serving cell.

28. The method according to claim 26, characterized in that The second resource is used for uplink synchronization between the terminal device and the TRP that sends the second SSB in the serving cell.

29. The terminal device according to any one of claims 21 to 28, characterized in that: The first information is 1 bit.

30. The terminal device according to any one of claims 21 to 29, characterized in that: The first information is carried in a physical downlink control channel PDCCH command.

31. A network device, characterized in that: include: A sending unit is used to send first information to a terminal device, where the first information is used to indicate a first resource, and the first resource is associated with a first synchronization signal block SSB.

32. The network device according to claim 31, characterized in that: The first SSB is configured in a current service cell of the terminal device, and the first SSB includes all SSBs in the service cell except the second SSB.

33. The network device according to claim 32, characterized in that: The second SSB is a cell definition synchronization signal block CD-SSB broadcast on the initial carrier bandwidth BWP in the serving cell.

34. The network device according to claim 32 or 33, characterized in that: The first information is also used to indicate a second resource, and the second resource is associated with the second SSB.

35. The network device according to claim 34, characterized in that: The first resource and the second resource are random access wireless resources.

36. The network device according to claim 34 or 35, characterized in that: The first resource and the second resource are used for uplink synchronization of the terminal device in the serving cell.

37. The method according to claim 36, characterized in that The first resource is used for uplink synchronization between the terminal device and the TRP that sends the first SSB in the serving cell.

38. The method according to claim 36, characterized in that The second resource is used for uplink synchronization between the terminal device and the TRP that sends the second SSB in the serving cell.

39. The network device according to any one of claims 31 to 38, characterized in that: The first information is 1 bit.

40. The network device according to any one of claims 31 to 39, characterized in that: The first information is carried in a physical downlink control channel PDCCH command.

41. A terminal device, characterized in that: The invention comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 1 to 10.

42. A network device, characterized in that: The system comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory to execute the method according to any one of claims 11 to 20.

43. A device, characterized in that The device comprises a processor, configured to call a program from a memory so as to enable the device to execute the method according to any one of claims 1 to 20.

44. A chip, characterized in that: The device comprises a processor, which is used to call a program from a memory so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 20.

45. A computer-readable storage medium, characterized in that A program is stored thereon, and the program enables a computer to execute the method according to any one of claims 1 to 20.

46. ​​A computer program product, characterized in that The method comprises a program which causes a computer to execute the method according to any one of claims 1 to 20.

47. A computer program, characterized in that The computer program enables a computer to execute the method according to any one of claims 1 to 20.

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