Communication method and apparatus, and storage medium, chip system and communication system

Abstract

Provided in the present application are a communication method and apparatus, and a storage medium, a chip system and a communication system. The method may comprise: receiving a first message and first indication information, wherein the first message is used for triggering a physical random access channel (PRACH), the first indication information indicates that the PRACH is associated with a target transmission and reception point (TRP), the target TRP includes a first TRP or a second TRP, the first TRP supports the reception of an uplink signal from a terminal device and supports the transmission of a downlink signal to the terminal device, and the second TRP only supports the reception of the uplink signal from the terminal device; and transmitting the PRACH to the first TRP on the basis of the first indication information. In this way, the reliability of PRACH transmission can be ensured.

Description

A communication method, apparatus, storage medium, chip system and communication system

[0001] The present application claims priority from the Chinese patent application No. 202411381563.X filed on September 29, 2024, and entitled "A communication method, apparatus, storage medium, chip system and communication system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to a communication method, apparatus, storage medium, chip system and communication system. BACKGROUND

[0003] For down link (DL) single transmission and reception point (sTRP) & up link (UL) multi-TRP (mTRP) deployment, a single TRP transmits a downlink signal, and multiple TRPs receive an uplink signal, which can enhance uplink coverage.

[0004] For example, taking a single TRP as TRP1 and the multiple TRPs including TRP1 and TRP2 as an example, a network device transmits a DL signal to a terminal device through TRP1 and receives an UL signal from the terminal device through TRP1 and / or TRP2. For DL sTRP & UL mTRP deployment, a physical random access channel (PRACH) transmitted by the terminal device can be transmitted to TRP1 or TRP2.

[0005] Since the PRACH transmitted to TRP1 and the PRACH transmitted to TRP2 need to use different power control mechanisms. Specifically, for the PRACH transmitted to TRP1, the transmission power of the PRACH can be determined based on the path loss (PL) measured by the DL reference signal (RS) of TRP1. For the PRACH transmitted to TRP2, the transmission power of the PRACH can be determined based on the PL measured by the DL RS of TRP1 and a PL offset. Therefore, how to indicate whether the PRACH is transmitted to TRP1 or TRP2 is a technical problem to be solved at present. SUMMARY

[0006] The application discloses a communication method, device, storage medium, chip system and communication system. The first indication information can be used to indicate that the PRACH is transmitted to the target TRP, thereby facilitating the reliability of the PRACH transmission.

[0007] In a first aspect, the embodiments of the application provide a communication method, which can be applied to a terminal device, an apparatus (for example, a chip or a chip system or a circuit) in the terminal device, or an apparatus that can be used with the terminal device. The method can include: receiving a first message and first indication information, the first message being used to trigger a PRACH, and the first indication information indicating that the PRACH is associated with a target TRP; wherein the target TRP includes a first TRP or a second TRP, the first TRP supporting receiving an uplink signal from the terminal device and supporting transmitting a downlink signal to the terminal device, and the second TRP only supporting receiving the uplink signal from the terminal device; and transmitting the PRACH to the target TRP based on the first indication information.

[0008] In the technical solution, the first indication information can be used to indicate that the PRACH is transmitted to the target TRP, thereby facilitating the accurate determination of the transmission power of the PRACH, and thereby facilitating the reliability of the PRACH transmission.

[0009] In a possible implementation, the first message is a physical downlink control channel (PDCCH) order, and the first indication information is carried in a first indication field in the PDCCH order.

[0010] In the technical solution, the first indication field can be an existing bit field in the PDCCH order, thereby reusing the existing information field in the PDCCH order without additional signaling overhead. Alternatively, the first indication field can be a newly added bit field in the PDCCH order.

[0011] In a possible implementation, the first indication field is an indication field corresponding to a cell identifier indicator; in response to the indication field corresponding to the cell identifier indicator indicating a first cell identifier, the target TRP is the first TRP; and / or, in response to the indication field corresponding to the cell identifier indicator indicating a second cell identifier, the target TRP is the second TRP.

[0012] In the technical solution, through the content indicated by the indication domain corresponding to the cell identifier indicator in the PDCCH order, whether in the intra-cell uplink multi-TRP (intra-cell UL multi-TRP) scenario or in the inter-cell uplink multi-TRP (inter-cell UL multi-TRP) scenario, it can be determined whether the target TRP is the first TRP or the second TRP. Compared with the way of indicating the target TRP through the PRACH association indicator (association indicator) bit domain in the PDCCH order, this way cannot determine which TRP is the target TRP in the intra-cell UL multi-TRP scenario.

[0013] In a possible implementation, the first cell identifier is a physical cell identifier (PCI) of a cell corresponding to the first TRP, and the second cell identifier is a virtual cell identifier of a cell corresponding to the second TRP, and the virtual cell identifier of the cell corresponding to the second TRP is different from the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP; or the first cell identifier is the PCI of the cell corresponding to the first TRP, and the second cell identifier is the PCI of the cell corresponding to the second TRP, and the PCI of the cell corresponding to the first TRP is different from the PCI of the cell corresponding to the second TRP.

[0014] In a possible implementation, the first indication domain is an indication domain corresponding to a synchronization signal block (SSB) index; the first TRP corresponds to a first SSB index set, and the second TRP corresponds to a second SSB index set; in response to the SSB index indicated by the indication domain corresponding to the SSB index belonging to the first SSB index set, the target TRP is the first TRP; and / or, in response to the SSB index indicated by the indication domain corresponding to the SSB index belonging to the second SSB index set, the target TRP is the second TRP.

[0015] In the technical solution, through the content indicated by the indication domain corresponding to the SSB index in the PDCCH order, whether in the intra-cell uplink multi-TRP (intra-cell UL multi-TRP) scenario or in the inter-cell uplink multi-TRP (inter-cell UL multi-TRP) scenario, it can be determined whether the target TRP is the first TRP or the second TRP.

[0016] In a possible implementation, the SSB indexes in the first SSB index set are completely different from the SSB indexes in the second SSB index set.

[0017] In a possible implementation, the first SSB index set includes at least one first SSB index, and the first SSB index is an index of an SSB sent by the first TRP; and the second SSB index set includes at least one second SSB index, and the second SSB index is an index other than the index of the SSB sent by the first TRP.

[0018] In a possible implementation, the SSB indexes in the second SSB index set have a corresponding relationship with the SSB indexes in the first SSB index set.

[0019] In a possible implementation, the first indication field is an indication field corresponding to an uplink (UL) / supplementary uplink (SUL) indicator; in response to a value of the indication field corresponding to the UL / SUL indicator being a first value, the target TRP is the first TRP; and / or, in response to the value of the indication field corresponding to the UL / SUL indicator being a second value, the target TRP is the second TRP.

[0020] In the technical solution, through the content indicated by the indication field corresponding to the UL / SUL indicator in the PDCCH order, whether in the intra-cell UL multi-TRP scenario or in the inter-cell UL multi-TRP scenario, it can be determined whether the target TRP is the first TRP or the second TRP.

[0021] In a possible implementation, in response to the serving cell not being configured with an SUL carrier, the first indication field is an indication field corresponding to a UL / SUL indicator; and / or, in response to the serving cell being configured with an SUL carrier, the first indication field is an indication field corresponding to a cell identifier indicator or an indication field corresponding to an SSB index.

[0022] In the technical solution, by determining whether the serving cell is configured with an SUL carrier, it can be quickly determined in which indication field of the PDCCH order the first indication information is carried, and then it is beneficial to quickly determine whether the target TRP is the first TRP or the second TRP.

[0023] In a second aspect, the embodiments of the present application provide another communication method, which can be applied to a first TRP or a second TRP, or a device (for example, a chip, or a chip system, or a circuit) in the first TRP or the second TRP, or a device that can be used with the first TRP or the second TRP. The method can include: receiving a PRACH based on first indication information, the first indication information indicating that the PRACH is associated with a target TRP, the PRACH being triggered by a first message, the first message being sent by the first TRP; and wherein the target TRP includes the first TRP or the second TRP, the first TRP supporting receiving an uplink signal from a terminal device and supporting sending a downlink signal to the terminal device, and the second TRP only supporting receiving an uplink signal from a terminal device.

[0024] In this technical solution, the first indication information can indicate that the PRACH is sent to the target TRP, which is beneficial to the terminal device accurately determining the transmission power of the PRACH, thereby being beneficial to ensuring the reliability of PRACH transmission.

[0025] In a possible implementation, the first message is a PDCCH order, and the first indication information is carried in a first indication field in the PDCCH order.

[0026] In this technical solution, the first indication field can be an existing bit field in the PDCCH order, and by reusing the existing information field in the PDCCH order, no additional signaling overhead is generated. Alternatively, the first indication field can be a newly added bit field in the PDCCH order.

[0027] In a possible implementation, the first indication field is an indication field corresponding to a cell identity indicator; in response to the indication field corresponding to the cell identity indicator indicating a first cell identity, the target TRP is the first TRP; and / or, in response to the indication field corresponding to the cell identity indicator indicating a second cell identity, the target TRP is the second TRP.

[0028] In this technical solution, by the content indicated by the indication field corresponding to the cell identity indicator in the PDCCH order, whether in an intra-cell uplink multi-TRP (intra-cell UL multi-TRP) scenario or in an inter-cell uplink multi-TRP (inter-cell UL multi-TRP) scenario, it can be determined whether the target TRP is the first TRP or the second TRP. Compared with the way of indicating the target TRP by a PRACH association indicator in the PDCCH order, this way cannot determine which TRP is the target TRP in the intra-cell UL multi-TRP scenario.

[0029] In a possible implementation, the first cell identifier is a physical cell identifier (PCI) of the cell corresponding to the first TRP, and the second cell identifier is a virtual cell identifier of the cell corresponding to the second TRP, and the virtual cell identifier of the cell corresponding to the second TRP is different from the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP; or the first cell identifier is the PCI of the cell corresponding to the first TRP, and the second cell identifier is the PCI of the cell corresponding to the second TRP, and the PCI of the cell corresponding to the first TRP is different from the PCI of the cell corresponding to the second TRP.

[0030] In a possible implementation, the first indication field is an indication field corresponding to an SSB index, the first TRP corresponds to a first set of SSB indexes, and the second TRP corresponds to a second set of SSB indexes; in response to the SSB index indicated by the indication field corresponding to the SSB index belonging to the first set of SSB indexes, the target TRP is the first TRP; and / or, in response to the SSB index indicated by the indication field corresponding to the SSB index belonging to the second set of SSB indexes, the target TRP is the second TRP.

[0031] In this technical solution, through the content indicated by the indication field corresponding to the SSB index in the PDCCH order, whether in the intra-cell UL multi-TRP scenario or in the inter-cell UL multi-TRP scenario, it can be determined whether the target TRP is the first TRP or the second TRP.

[0032] In a possible implementation, the SSB indexes in the first set of SSB indexes are completely different from the SSB indexes in the second set of SSB indexes.

[0033] In a possible implementation, the first set of SSB indexes includes at least one first SSB index, and the first SSB index is an index of an SSB transmitted by the first TRP; and the second set of SSB indexes includes at least one second SSB index, and the second SSB index is an index other than the index of the SSB transmitted by the first TRP.

[0034] In a possible implementation, the SSB indexes in the second set of SSB indexes have a corresponding relationship with the SSB indexes in the first set of SSB indexes.

[0035] In a possible implementation, the first indication field is an indication field corresponding to an UL / SUL indicator; in response to the value of the indication field corresponding to the UL / SUL indicator being a first value, the target TRP is the first TRP; and / or, in response to the value of the indication field corresponding to the UL / SUL indicator being a second value, the target TRP is the second TRP.

[0036] In the technical solution, through the content indicated by the indication domain corresponding to the UL / SUL indicator in the PDCCH order, whether in the intra-cell UL multi-TRP scenario or in the inter-cell UL multi-TRP scenario, it can be determined whether the target TRP is the first TRP or the second TRP.

[0037] In a possible implementation, in response to the serving cell not configuring the SUL carrier, the first indication domain is the indication domain corresponding to the UL / SUL indicator; and / or, in response to the serving cell configuring the SUL carrier, the first indication domain is the indication domain corresponding to the cell identifier indicator or the indication domain corresponding to the SSB index.

[0038] In the technical solution, by determining whether the serving cell configures the SUL carrier, it can be quickly determined in which indication domain of the PDCCH order the first indication information is carried, and then it is beneficial to quickly determine whether the target TRP is the first TRP or the second TRP.

[0039] In a third aspect, an embodiment of the present application provides a communication apparatus, which comprises a module / unit for executing any method in the first aspect or any possible implementation manner of the first aspect. The apparatus can be a terminal device, or a module (for example, a chip, a chip system, or a processor) applied to the terminal device, or a logic node, a logic module, or software capable of realizing all or part of the functions of the terminal device.

[0040] In a fourth aspect, an embodiment of the present application provides a communication apparatus, which comprises a module / unit for executing any method in the second aspect or any possible implementation manner of the second aspect. The apparatus can be the first TRP or the second TRP, or a module (for example, a chip, a chip system, or a processor) applied to the first TRP or the second TRP, or a logic node, a logic module, or software capable of realizing all or part of the functions of the first TRP, or a logic node, a logic module, or software capable of realizing all or part of the functions of the second TRP.

[0041] In a fifth aspect, an embodiment of the present application provides a communication apparatus, which can be a terminal device, or a device (for example, a chip, or a chip system, or a circuit) in the terminal device. The communication apparatus can comprise a processor coupled with a memory, and the memory is used to store programs or instructions, when the programs or instructions are executed by the processor, the communication apparatus executes the method performed by the terminal device, or the device in the terminal device, in the above-mentioned method embodiments.

[0042] In a sixth aspect, an embodiment of the present application provides a communication apparatus, which can be the first TRP or the second TRP, or a device (for example, a chip, or a chip system, or a circuit) in the first TRP or the second TRP. The communication apparatus can include a processor coupled to a memory, and the memory is configured to store a program or an instruction, and when the program or the instruction is executed by the processor, the communication apparatus performs the method performed by the first TRP or the second TRP in the method embodiments described above, or the communication apparatus performs the method performed by the device in the first TRP or the second TRP in the method embodiments described above.

[0043] In a seventh aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program or computer instructions, and when the computer program or computer instructions are run on a computer, the computer program or computer instructions make the computer perform any one of the methods in the first aspect or any possible implementation of the first aspect, the second aspect or any possible implementation of the second aspect.

[0044] In an eighth aspect, an embodiment of the present application provides a computer program product containing program instructions, and when the computer program product is run on a computer, the computer program product makes the computer perform any one of the methods in the first aspect or any possible implementation of the first aspect, the second aspect or any possible implementation of the second aspect.

[0045] In a ninth aspect, an embodiment of the present application provides a chip system, which includes at least one processor and an interface circuit, and the interface circuit and the at least one processor are interconnected through a line. The at least one processor is configured to execute a computer program or instructions, so that any one of the methods in the first aspect or any possible implementation of the first aspect, the second aspect or any possible implementation of the second aspect is executed. In a possible implementation, the chip system can further include at least one memory, and the interface circuit, the at least one memory and the at least one processor are interconnected through a line. The at least one memory stores instructions, and when the instructions are executed by the processor, any one of the methods in the first aspect or any possible implementation of the first aspect, the second aspect or any possible implementation of the second aspect is executed. The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0046] In a tenth aspect, an embodiment of the present application provides a communication system, which includes a terminal device, a first TRP and a second TRP, and when the terminal device, the first TRP and the second TRP run in the communication system, any one of the methods in the first aspect or any possible implementation of the first aspect, the second aspect or any possible implementation of the second aspect is executed. BRIEF DESCRIPTION OF DRAWINGS

[0047] FIG. 1 is a schematic diagram of an architecture of a communication system to which embodiments of the present application are applicable;

[0048] FIG. 2 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0049] FIG. 3 is a schematic diagram of a flow of another communication method according to an embodiment of the present application;

[0050] FIG. 4 is a schematic diagram of a flow of still another communication method according to an embodiment of the present application;

[0051] FIG. 5 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0052] FIG. 6 is a schematic diagram of a structure of another communication apparatus according to an embodiment of the present application;

[0053] FIG. 7 is a schematic diagram of a structure of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0054] Further specific embodiments of the present application will be described in detail with reference to the accompanying drawings, in which:

[0055] The terms "first" and "second" and the like in the description and in the claims of the present specification are used for distinguishing between similar elements and not necessarily for describing a specific sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms "first", "second", etc., are to be interpreted, by those skilled in the art, as a structural or functional pertinence but not a chronological or sequential pertinence. Furthermore, the terms "comprise", "include", "contain" and / or "have" and / or any variations thereof in this specification are used to indicate the inclusion of a stated integer or group of integers but not to the exclusion of any other integer or group of integers. For example, a process, method, system, product, or apparatus that comprises a list of steps or units is not necessarily limited to the listed steps or units but can include additional steps or units not expressly listed or inherent to such process, method, system, product, or apparatus.

[0056] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a common alternative embodiment. It is expressly understood that any of the features, structures, or characteristics described in connection with an embodiment can be included in at least one implementation of the application. It is expressly understood that the phrase "in one embodiment" is not used to refer to only a single implementation or alteration of the application, but rather is used to refer to one implementation or alteration of the application in conjunction with at least one other implementation or alteration of the application.

[0057] In the present application, "at least one" means one or more, "multiple" means two or more, "at least two" means two or three and three or more, and "and / or" is used to describe the relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c, can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where each of a, b, and c can be an element or a set containing one or more elements.

[0058] In the present application, "sending information to (for example, a terminal device)" can be understood as the destination of the information is the terminal device. It can include direct or indirect sending of information to the terminal device. "Receiving information from (for example, a terminal device)" or "receiving information from (for example, a terminal device)" can be understood as the source of the information is the terminal device, which can include direct or indirect reception of information from the terminal device. The information between the source and the destination of the information transmission can be processed as necessary, such as format change, etc., but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly, and will not be repeated here.

[0059] In the description of the present application, "indication" can include direct indication and indirect indication, and can also include explicit indication and implicit indication. The information indicated by a certain information (indication information mentioned below) is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, the information to be indicated can be directly indicated, such as indicating the information to be indicated itself or the index of the information to be indicated. For another example, the information to be indicated can also be indirectly indicated by indicating other information, and there is an association relationship between the indicated other information and the information to be indicated. For another example, only a part of the information to be indicated can be indicated, and the other part of the information to be indicated is known or agreed in advance. In addition, the indication of a specific information can also be realized by means of the arrangement order of each information agreed in advance (such as protocol), thereby reducing the indication overhead to a certain extent.

[0060] In order to better understand the embodiments of the present application, first, the system architecture related to the embodiments of the present application will be introduced as follows:

[0061] Embodiments of the present application can be applied to a long term evolution (LTE) system, a 5th generation mobile communication (5G) system, a 6th generation mobile communication (6G) system and the like, a satellite communication system and a short-range wireless communication system. Among them, the wireless communication system mentioned in the embodiments of the present application includes but is not limited to three application scenarios of a 5G / 6G mobile communication system, a long range (LoRa) system or a vehicle-to-everything (V2X) system. The three application scenarios of the 5G / 6G mobile communication system are: enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC) and massive machine type of communication (mMTC). The wireless communication system can include one or more access network devices and one or more terminal devices.

[0062] The system architecture shown in FIG. 1 is used as an example for illustration.

[0063] Referring to FIG. 1, FIG. 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application. The communication system includes a radio access network (RAN) 100, which can include but is not limited to a plurality of transmission and reception points (TRPs) and at least one terminal device. The plurality of TRPs includes a first TRP and a second TRP. The first TRP supports receiving an uplink signal from the terminal device and supports transmitting a downlink signal to the terminal device. The second TRP only supports receiving an uplink signal from the terminal device, i.e., the second TRP only supports receiving an uplink signal from the terminal device and does not support transmitting a downlink signal to the terminal device. The number of first TRPs can be one or more, and the number of second TRPs can be one or more.

[0064] For example, in FIG. 1, the number of the first TRP 101, the second TRP 102 and the terminal device 103 in the RAN 100 is one. The number and form of devices shown in FIG. 1 are used as examples and do not constitute a limitation on the embodiments of the present application.

[0065] Other RAN nodes such as wireless relay devices and / or wireless backhaul devices (not shown in FIG. 1) can also be included in the RAN 100. It is noted that the RAN 100 can be a 3rd Generation Partnership Project (3GPP) related cellular system, such as a 4G, 5G mobile communication system, or an evolved system after 5G (e.g., a 6G mobile communication system). The RAN 100 can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), etc. The RAN 100 can also be a communication system that combines two or more of the above systems. It is noted that the number of the first TRPs, the second TRPs, and the terminal devices in FIG. 1 is only illustrative and should not be considered as a specific limitation to the present disclosure. The terminal devices and the TRPs involved in the system architecture will be described in detail below.

[0066] I. Terminal Device

[0067] A terminal device can also be referred to as a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., or a device used to provide voice or data connectivity to a user, or an Internet of Things device. For example, a terminal device includes a handheld device having wireless connection capability, a vehicle-mounted device, etc. Currently, a terminal device can be a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile Internet device (MID), a wearable device, a vehicle-mounted device (e.g., a car, a bicycle, an electric vehicle, an airplane, a ship, a train, a high-speed rail, etc.), a satellite terminal, a virtual reality (VR) device, an augmented reality (AR) device, a point of sale (POS) machine, a customer-premises equipment (CPE), a wireless terminal in industrial control, a smart home device (e.g., a refrigerator, a television, an air conditioner, an electricity meter, etc.), a smart robot, a mechanical arm, a plant device, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, 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, a flight device (e.g., a smart robot, a hot air balloon, a drone, an airplane), etc. A terminal device can also be other devices with terminal functions, such as a device that plays a terminal role in D2D communication.

[0068] Embodiments of the present application do not limit the device form of the terminal device, and the device for implementing the function of the terminal device can be the terminal device; or can be a device capable of supporting the terminal device to implement the function, such as a chip system. The device can be installed in the terminal device or used in matching with the terminal device. In embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0069] II. Transmission and reception point (TRP)

[0070] In embodiments of the present application, the TRP can be understood as a physical transmission and reception point of a cell. One TRP can be one entity network site, such as a remote radio head (RRH) or a base station, and one TRP can also be composed of multiple entity network sites. The specific definition of the TRP is not limited in the present application. The TRP can also be referred to as a transmission and reception point.

[0071] In embodiments of the present application, the first TRP supporting receiving the uplink signal from the terminal device and supporting transmitting the downlink signal to the terminal device can also be referred to as the main TRP, the downlink TRP, the DL TRP or other names. The second TRP supporting only receiving the uplink signal from the terminal device can also be referred to as the auxiliary TRP, the uplink TRP, the UL TRP or other names.

[0072] In embodiments of the present application, the form of the first TRP and the second TRP is not limited, and the device for implementing the function of the first TRP can be the first TRP; or can be a device capable of supporting the first TRP to implement the function, such as a chip system. The device for implementing the function of the second TRP can be the second TRP; or can be a device capable of supporting the second TRP to implement the function, such as a chip system. The device can be installed in the access network device or used in matching with the access network device.

[0073] The communication method provided by the embodiments of the present application is described in detail below based on the system architecture shown in FIG. 1. Through the communication method, it can be indicated whether the PRACH is sent to the first TRP or the second TRP, which is beneficial to accurately determine the transmission power of the PRACH, thereby being beneficial to ensuring the reliability of the PRACH transmission.

[0074] The terminal device in the following embodiments (corresponding to the following FIG. 2-FIG. 4) can be the terminal device in the network architecture shown in FIG. 1, and the functions performed by the terminal device in the embodiments can also be performed by the device (for example, a chip, or a chip system, or a circuit) in the terminal device. The first TRP in the following embodiments can be the first TRP in the network architecture shown in FIG. 1, and the functions performed by the first TRP in the embodiments can also be performed by the device (for example, a chip, or a chip system, or a circuit) in the first TRP. The second TRP in the following embodiments can be the second TRP in the network architecture shown in FIG. 1, and the functions performed by the second TRP in the embodiments can also be performed by the device (for example, a chip, or a chip system, or a circuit) in the second TRP. The embodiments of the present application are uniformly described here, and will not be repeated hereinafter.

[0075] Please refer to FIG. 2, which is a flowchart of a communication method provided by an embodiment of the present application. The method can include but is not limited to the following steps:

[0076] S201, the terminal device receives a first message and first indication information, the first message is used to trigger a PRACH, and the first indication information indicates that the PRACH is associated with a target TRP; wherein the target TRP includes a first TRP or a second TRP, the first TRP supports receiving an uplink signal from the terminal device and supports sending a downlink signal to the terminal device, and the second TRP only supports receiving an uplink signal from the terminal device.

[0077] In the embodiments of the present application, the first message and the first indication information can be sent by the first TRP. Correspondingly, the terminal device receives the first message and the first indication information from the first TRP, and then determines whether to send the PRACH to the first TRP or the second TRP based on the first indication information.

[0078] The indication content of the first indication information can be described as any of the following: the PRACH is associated with the target TRP; the PRACH uses the PRACH configuration (config) of the target TRP; the transmission power of the PRACH is determined by the path loss (PL) RS associated with the target TRP and / or the PL offset associated with the target TRP; the transmission power of the PRACH is determined by the quasi co-location (QCL) RS associated with the target TRP; the PRACH is sent to the target TRP; the PRACH is sent to the target TRP; and the receiver of the PRACH is the target TRP. These descriptions have the same meaning and can be used interchangeably.

[0079] In case the target TRP is the first TRP, the transmission power of the PRACH can be determined by the PL-RS associated with the first TRP. In case the target TRP is the second TRP, the transmission power of the PRACH can be determined by the PL-RS associated with the second TRP and / or the PL offset associated with the second TRP.

[0080] The target TRP and the PL-RS can be associated by a transmission configuration indication (TCI) state corresponding to the target TRP, i.e., the PL-RS associated with the target TRP can also be described as a PL-RS associated with a (TCI state corresponding to the target TRP).

[0081] The target TRP and the PL offset can be associated by a TCI state corresponding to the target TRP, i.e., the PL offset associated with the target TRP can also be described as a PL offset associated with a (TCI state corresponding to the target TRP).

[0082] The target TRP and the QCL-RS can be associated by a TCI state corresponding to the target TRP, i.e., the QCL-RS associated with the target TRP can also be described as a QCL-RS associated with a (TCI state corresponding to the target TRP).

[0083] In a possible implementation, the first message can be a physical downlink control channel (PDCCH) order, which can trigger the non-contention PRACH. Alternatively, the first message can be a higher layer signaling, which can include a Radio Resource Control (RRC) message. For example, in a cell handover scenario, the PRACH can be triggered by the RRC message.

[0084] In a possible implementation, the first message can carry the first indication information, that is, the first message and the first indication information are sent simultaneously, for example, the first message is a PDCCH order, and the PDCCH order carries the first indication information. Alternatively, the first message does not carry the first indication information, that is, the first message and the message carrying the first indication information are different messages, in which case, the first message and the message carrying the first indication information can be sent simultaneously or separately, and the embodiments of the present application do not limit this. In addition, the embodiments of the present application do not limit the sending order of the first message and the message carrying the first indication information. For example, the first TRP can first send the first message, or the first TRP can first send the message carrying the first indication information, or the first TRP can simultaneously send the first message and the message carrying the first indication information.

[0085] S202, the terminal device sends a PRACH to the target TRP based on the first indication information.

[0086] When the target TRP is the first TRP, the terminal device can determine the transmission power of the PRACH based on the path loss (PL) measured by the DL RS of the first TRP, and send the PRACH to the first TRP.

[0087] Similarly, when the target TRP is the second TRP, the terminal device can determine the transmission power of the PRACH based on the PL measured by the DL RS of the first TRP and a PL offset, and send the PRACH to the second TRP.

[0088] In the embodiments of the present application, the first indication information can indicate that the PRACH is sent to the target TRP, which is beneficial to accurately determining the transmission power of the PRACH, thereby facilitating to ensure the reliability of PRACH transmission.

[0089] Please refer to FIG. 3, which is a flowchart of another communication method provided by the embodiments of the present application, and FIG. 3 takes the target TRP as the first TRP as an example for illustration. The method can include but is not limited to the following steps:

[0090] S301, the first TRP sends a first message and a first indication information, the first message is used to trigger a PRACH, and the first indication information indicates that the PRACH is associated with a target TRP; wherein the target TRP includes the first TRP or a second TRP. Correspondingly, the terminal device receives the first message and the first indication information.

[0091] Wherein, the first TRP supports receiving uplink signals from the terminal device and supporting sending downlink signals to the terminal device, and the second TRP only supports receiving uplink signals from the terminal device.

[0092] It should be noted that the related content of S301 can be referred to the specific description of S201 in the corresponding embodiment of FIG. 2, which will not be repeated here.

[0093] S302, in response to the target TRP being the first TRP, the terminal device sends PRACH to the first TRP based on the first indication information. Correspondingly, the first TRP receives the PRACH.

[0094] It should be noted that the related content of S302 can be referred to the specific description of S202 in the corresponding embodiment of FIG. 2, which will not be repeated here.

[0095] Please refer to FIG. 4, which is a flowchart of another communication method provided by the embodiments of the present application. In FIG. 4, the target TRP is taken as the second TRP for example. The method can include but not limited to the following steps:

[0096] S401, the first TRP sends a first message and first indication information, the first message is used to trigger PRACH, and the first indication information indicates that the PRACH is associated with the target TRP; wherein the target TRP includes the first TRP or the second TRP. Correspondingly, the terminal device receives the first message and the first indication information.

[0097] Wherein, the first TRP supports receiving uplink signals from the terminal device and supporting sending downlink signals to the terminal device, and the second TRP only supports receiving uplink signals from the terminal device.

[0098] It should be noted that the related content of S401 can be referred to the specific description of S201 in the corresponding embodiment of FIG. 2, which will not be repeated here.

[0099] S402, in response to the target TRP being the second TRP, the terminal device sends PRACH to the second TRP based on the first indication information. Correspondingly, the second TRP receives the PRACH.

[0100] It should be noted that the related content of S402 can be referred to the specific description of S202 in the corresponding embodiment of FIG. 2, which will not be repeated here.

[0101] In a possible implementation, when the first message is a PDCCH order and the first message carries the first indication information, the first indication information can be carried through a first indication field in the PDCCH order.

[0102] Optionally, the first indication field can be an existing bit field in the PDCCH order, or the first indication field can be a newly added bit field in the PDCCH order. Embodiments of the present application do not limit the position of the first indication field in the PDCCH order, that is, do not limit the position of the bit occupied by the first indication field in the PDCCH order.

[0103] In a possible implementation, the first indication field can be any one of the following bit fields in the PDCCH order: an indication field corresponding to a cell indicator, an indication field corresponding to a synchronization signal block (SSB) index, and an indication field corresponding to an uplink (UL) / supplementary uplink (SUL) indicator. The indication field corresponding to the cell indicator can be the cell indicator, the indication field corresponding to the SSB index can be the SSB index, and the indication field corresponding to the UL / SUL indicator can be the UL / SUL indicator. In this way, it can be determined whether the target TRP is the first TRP or the second TRP, and the existing information field in the PDCCH order can be reused without additional signaling overhead.

[0104] Next, taking the first indication field as the indication field corresponding to the cell indicator in the PDCCH order as an example, the content indicated by the indication field corresponding to the cell indicator is described, and how to determine whether the target TRP is the first TRP or the second TRP is described.

[0105] In a possible implementation, in response to the indication field corresponding to the cell indicator indicating a first cell identifier, the target TRP is the first TRP; and / or, in response to the indication field corresponding to the cell indicator indicating a second cell identifier, the target TRP is the second TRP. That is, by determining whether the cell identifier indicated by the indication field corresponding to the cell indicator is the first cell identifier or the second cell identifier, it can be quickly determined whether the target TRP is the first TRP or the second TRP.

[0106] In a possible implementation, the network device can configure a virtually cell identifier (VCI) for each second TRP. For example, for a case that a cell includes two second TRPs, the two second TRPs are respectively a second TRP1 and a second TRP2, the network device can configure a VCI 700 for the second TRP1 and a VCI 701 for the second TRP2. Assuming that the indication domain indicated by the cell identifier indicator indicates a cell identifier 700, the target TRP is the second TRP1.

[0107] Optionally, for a second TRP, the VCI of the second TRP can have an association relationship with the PCI of the second TRP, that is, the VCI of the second TRP can be obtained through the PCI of the second TRP, and / or the PCI of the second TRP can be obtained through the VCI of the second TRP.

[0108] Optionally, for a second TRP, the VCI of the second TRP has a value different from a value of a physical cell identifier (PCI) of the TRP, that is, the VCI of the TRP or the PCI of the TRP can be distinguished through the value.

[0109] In a possible implementation, the first cell identifier can be a PCI of a cell corresponding to the first TRP, the second cell identifier can be a VCI of a cell corresponding to the second TRP, and the VCI of the cell corresponding to the second TRP is different from the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP. The PCI of the cell corresponding to the first TRP can be the same as the PCI of the cell corresponding to the second TRP, that is, the cell corresponding to the first TRP and the cell corresponding to the second TRP are the same cell, which can be understood as an intra-cell uplink multi-TRP (intra-cell UL multi-TRP) scenario. In this way, in the intra-cell UL multi-TRP scenario, in response to the indication domain indicated by the cell identifier indicator indicating the PCI, the target TRP can be the first TRP, which can be a serving TRP in an implementation; and / or in response to the indication domain indicated by the cell identifier indicator indicating the VCI, the target TRP can be the second TRP corresponding to the VCI. For example, in response to the indication domain indicated by the cell identifier indicator indicating the VCI, the target TRP can be the second TRP corresponding to the PCI associated with the VCI. The serving TRP can refer to a TRP providing services for a terminal device.

[0110] In a possible implementation, the first cell identity can be a PCI of a first TRP corresponding cell, and the second cell identity can be a PCI of a second TRP corresponding cell, and the PCI of the first TRP corresponding cell is different from the PCI of the second TRP corresponding cell. The PCI of the first TRP corresponding cell being different from the PCI of the second TRP corresponding cell means that the first TRP corresponding cell and the second TRP corresponding cell are different cells, which can be understood as an inter-cell uplink multi-TRP (inter-cell UL multi-TRP) scenario. In this way, in the inter-cell UL multi-TRP scenario, in response to the indication field corresponding to the cell identity indicator indicating the PCI of the first TRP corresponding cell, the target TRP can be the first TRP, and / or in response to the indication field corresponding to the cell identity indicator indicating the PCI of the second TRP corresponding cell, the target TRP can be the second TRP.

[0111] It can be seen that, through the content indicated by the indication field corresponding to the cell identity indicator in the PDCCH order, whether in the intra-cell UL multi-TRP scenario or in the inter-cell UL multi-TRP scenario, it can be determined whether the target TRP is the first TRP or the second TRP. Compared with the manner of indicating the target TRP through the PRACH association indicator bit field in the PDCCH order, this manner cannot determine which TRP is the target TRP in the intra-cell UL multi-TRP scenario.

[0112] In the inter-cell UL multi-TRP scenario, the PRACH association indicator indicates whether the PRACH is sent to the serving cell or other cells. In the intra-cell UL multi-TRP scenario, the PRACH association indicator indicates whether the PRACH is sent to the serving TRP or other TRPs except the serving TRP. Wherein, when the PRACH association indicator indicates that the PRACH is sent to the serving TRP, the terminal device can determine the PL between the serving TRP and the terminal device based on the QCL-RS of the control resource set (CORESET) where the PDCCH order is located, that is, the QCL-RS of the CORESET where the PDCCH order is located as the PL-RS. When the PRACH association indicator indicates that the PRACH is sent to other TRPs except the serving TRP, the terminal device can determine the PL between the serving TRP and the terminal device based on the SSB indicated by the SSB index bit field in the PDCCH order, that is, the SSB indicated by the SSB index bit field in the PDCCH order as the PL-RS.

[0113] Since in the intra-cell UL multi-TRP scenario, no matter whether the PRACH is sent to the first TRP or the second TRP, the PDCCH order is sent by the first TRP, which means that the QCL-RS of the CORESET where the PDCCH order is located and the SSB indicated by the SSB index bit field in the PDCCH order are the same reference signal, therefore, in the intra-cell UL multi-TRP scenario, it is not possible to determine whether the target TRP is the first TRP or the second TRP.

[0114] Next, taking the first indication field as an example, the indication field corresponding to the SSB index in the PDCCH order, the content indicated by the indication field corresponding to the SSB index is explained, how to determine whether the target TRP is the first TRP or the second TRP.

[0115] In a possible implementation, the first TRP corresponds to a first set of SSB indexes, and the second TRP corresponds to a second set of SSB indexes; in response to the SSB index indicated by the indication field corresponding to the SSB index belonging to the first set of SSB indexes, the target TRP is the first TRP; and / or, in response to the SSB index indicated by the indication field corresponding to the SSB index belonging to the second set of SSB indexes, the target TRP is the second TRP. In this implementation, by determining whether the SSB index indicated by the indication field corresponding to the SSB index belongs to the first set of SSB indexes or the second set of SSB indexes, the target TRP can be quickly determined to be the first TRP or the second TRP. The first set of SSB indexes and the second set of SSB indexes can each include one or more SSB indexes.

[0116] In a possible implementation, the SSB indexes in the first set of SSB indexes are completely different from the SSB indexes in the second set of SSB indexes. Alternatively, the SSB indexes in the first set of SSB indexes are partially different from and partially the same as the SSB indexes in the second set of SSB indexes.

[0117] In a possible implementation, the first set of SSB indexes can include at least one first SSB index, and the first SSB index is an index of an SSB sent by the first TRP, or in other words, the first SSB index is an index of an SSB actually sent by the first TRP. For example, the first TRP can send a maximum of 64 SSBs, and the 64 SSBs are SSB#0 to SSB#63, where the number after the symbol “#” represents the index of the SSB. It is assumed that the first TRP actually sends four SSBs, and the four SSBs are SSB#0 to SSB#3. In this case, the first set of SSB indexes can include at least one index of the SSBs SSB#0 to SSB#3.

[0118] It should be noted that the index of the SSB actually sent by the first TRP can be continuous or discontinuous. For example, the first TRP actually sends four SSBs, and the four SSBs are SSB#0, SSB#2, SSB#4, and SSB#6, or the four SSBs are SSB#0, SSB#1, SSB#4, and SSB#6.

[0119] Optionally, the SSB indexes in the first SSB index set are indexes of SSBs actually transmitted by the first TRP. Optionally, the first SSB index set includes indexes of part or all of the SSBs actually transmitted by the first TRP. Alternatively, the first SSB index set can include a second SSB index in addition to indexes of at least one SSB actually transmitted by the first TRP. The second SSB index is an index other than an index of an SSB actually transmitted by the first TRP, or the second SSB index is an index other than indexes of SSBs actually transmitted by the first TRP.

[0120] Optionally, the second SSB index can be an index other than indexes of SSBs actually transmitted by the first TRP within a value range of the SSB index corresponding to the first TRP, or the second SSB index can be an index outside the value range of the SSB index corresponding to the first TRP. For example, the first TRP can transmit a maximum of 64 SSBs, and the 64 SSBs are SSB#0 to SSB#63. Assume that the first TRP actually transmits 4 SSBs, and the 4 SSBs are SSB#0 to SSB#3. In this case, the value range of the SSB index corresponding to the first TRP is 0 to 63, the value range of an index other than indexes of SSBs actually transmitted by the first TRP within the value range of the SSB index corresponding to the first TRP is 4 to 63, and the value range of an index outside the value range of the SSB index corresponding to the first TRP is a value greater than or equal to 64. In this case, the value range of the second SSB index can be 4 to 63 or a value greater than or equal to 64.

[0121] In a possible implementation, the second SSB index set can include at least one second SSB index. For example, in the above example, the second SSB index set can include an index of at least one of SSB#4 to SSB#63, or the second SSB index set includes at least one SSB index greater than or equal to 64.

[0122] Optionally, the SSB indexes in the second SSB index set are indexes other than indexes of SSBs actually transmitted by the first TRP. Alternatively, part of the SSB indexes in the second SSB index set are indexes other than indexes of SSBs actually transmitted by the first TRP, and another part of the SSB indexes in the second SSB index set are indexes of SSBs actually transmitted by the first TRP.

[0123] In a possible implementation, the SSB indexes in the second SSB index set have a corresponding relationship with the SSB indexes in the first SSB index set. Taking a certain SSB index (denoted as SSB index a hereinafter) in the second SSB index set as an example, the SSB index (denoted as SSB index b hereinafter) corresponding to the SSB index a in the first SSB index set can be the index of the SSB actually occurring for the first TRP, and the terminal device can determine the PL between the first TRP and the terminal device based on the SSB indicated by the SSB index b, thereby determining the transmission power of the PRACH sent to the first TRP. Alternatively, after the terminal device determines the PL between the first TRP and the terminal device based on the SSB indicated by the SSB index b, the terminal device can further determine the PL between the second TRP and the terminal device based on the PL between the first TRP and the terminal device and a PL offset, thereby determining the transmission power of the PRACH sent to the second TRP. The SSB indicated by the SSB index b can be understood as a PL-RS, that is, the SSB indicated by the SSB index b serves as a reference signal for determining the PL.

[0124] In a possible implementation, one or more SSB indexes in the second SSB index set can have a corresponding relationship with one SSB index in the first SSB index set.

[0125] In a possible implementation, each SSB index in the second SSB index set has a corresponding SSB index in the first SSB index set. Alternatively, part of the SSB indexes in the second SSB index set have corresponding SSB indexes in the first SSB index set, and the other part of the SSB indexes in the second SSB index set do not have corresponding SSB indexes in the first SSB index set.

[0126] For example, the SSB indexes in the second SSB index set are 58-63, 64, and 65, and the SSB indexes in the first SSB index set are 0-3. The SSB indexes 58-63 in the second SSB index set have corresponding SSB indexes in the first SSB index set, and the corresponding relationship is shown in Table 1. The SSB indexes 64 and 65 in the second SSB index set do not have corresponding SSB indexes in the first SSB index set.

[0127] Table 1: SSB index corresponding relationship

[0128] It should be noted that the SSB indexes in the first SSB index set can be continuous or discontinuous. The SSB indexes in the second SSB index set can be continuous or discontinuous.

[0129] It can be seen that, by the content indicated by the indication field corresponding to the SSB index in the PDCCH order, whether in the intra-cell UL multi-TRP scenario or in the inter-cell UL multi-TRP scenario, it can be determined whether the target TRP is the first TRP or the second TRP.

[0130] Next, taking the first indication field as the indication field corresponding to the UL / SUL indicator in the PDCCH order as an example, the content indicated by the indication field corresponding to the UL / SUL indicator is described, and how to determine whether the target TRP is the first TRP or the second TRP.

[0131] In a possible implementation, in response to the value of the indication field corresponding to the UL / SUL indicator being the first value, the target TRP is the first TRP; and / or, in response to the value of the indication field corresponding to the UL / SUL indicator being the second value, the target TRP is the second TRP. In this implementation, by determining whether the value of the indication field corresponding to the UL / SUL indicator is the first value or the second value, it can be quickly determined whether the target TRP is the first TRP or the second TRP.

[0132] Optionally, the value of the first value can be 0 or 1 or other values, and the value of the second value can be 0 or 1 or other values, wherein the first value is not equal to the second value. For example, the first value is 0, and the second value is 1.

[0133] In a possible implementation, in response to the serving cell not being configured with a SUL carrier, the first indication field is the indication field corresponding to the UL / SUL indicator; and / or, in response to the serving cell being configured with a SUL carrier, the first indication field is the indication field corresponding to the cell identifier or the indication field corresponding to the SSB index. That is, by determining whether the serving cell is configured with a SUL carrier, it can be quickly determined which indication field in the PDCCH order carries the first indication information, and then it is beneficial to quickly determine whether the target TRP is the first TRP or the second TRP.

[0134] It should be noted that, in addition to carrying the first indication information through the indication field corresponding to the cell identifier, the indication field corresponding to the SSB index, or the indication field corresponding to the UL / SUL indicator, the first indication information can also be carried through other indication fields in the PDCCH order. For details, reference can be made to the related description of carrying the first indication information through the indication field corresponding to the cell identifier, the indication field corresponding to the SSB index, or the indication field corresponding to the UL / SUL indicator, which will not be described here.

[0135] It can be seen that, through the content indicated by the indication field corresponding to the UL / SUL indicator in the PDCCH order, whether in the intra-cell UL multi-TRP scenario or in the inter-cell UL multi-TRP scenario, it can be determined whether the target TRP is the first TRP or the second TRP.

[0136] The above describes the method embodiments provided by the present application. In order to facilitate better implementation of the above scheme of the embodiments of the present application, the embodiments of the present application also provide corresponding devices.

[0137] The embodiments of the present application can divide the functional modules of the communication device according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the embodiments of the present application is illustrative, and is only a logical functional division. Actual implementation can have another division manner.

[0138] Please refer to FIG. 5, which is a structural schematic diagram of a communication device provided by an embodiment of the present application. The communication device 50 can be a terminal device, or a device (for example, a chip, or a chip system, or a circuit) in the terminal device. Alternatively, the communication device 50 can be a first TRP or a second TRP, or a device (for example, a chip, or a chip system, or a circuit) in the first TRP or the second TRP. As shown in FIG. 5, the communication device 50 at least includes a communication unit 501 and a processing unit 502.

[0139] For the case that the communication device 50 is used to realize the functions of the terminal device in the embodiments corresponding to FIG. 2-FIG. 4:

[0140] The processing unit 502 is configured to invoke the communication unit 501 to receive a first message and first indication information. The first message is used to trigger a PRACH, and the first indication information indicates that the PRACH is associated with a target TRP. The target TRP includes a first TRP or a second TRP. The first TRP supports receiving an uplink signal from a terminal device and supports sending a downlink signal to the terminal device. The second TRP only supports receiving an uplink signal from a terminal device.

[0141] The processing unit 502 is further configured to invoke the communication unit 501 to send the PRACH to the target TRP based on the first indication information.

[0142] In a possible implementation manner, the first message is a PDCCH order, and the first indication information is carried through a first indication field in the PDCCH order.

[0143] In a possible implementation, the first indication field is an indication field corresponding to a cell identity indicator; the target TRP is the first TRP in response to the indication field corresponding to the cell identity indicator indicating the first cell identity; and / or the target TRP is the second TRP in response to the indication field corresponding to the cell identity indicator indicating the second cell identity.

[0144] In a possible implementation, the first cell identity is a physical cell identity, PCI, of a cell corresponding to the first TRP, the second cell identity is a virtual cell identity of a cell corresponding to the second TRP, and the virtual cell identity of the cell corresponding to the second TRP is different from the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP; or the first cell identity is the PCI of the cell corresponding to the first TRP, the second cell identity is the PCI of the cell corresponding to the second TRP, and the PCI of the cell corresponding to the first TRP is different from the PCI of the cell corresponding to the second TRP.

[0145] In a possible implementation, the first indication field is an indication field corresponding to an SSB index; the first TRP corresponds to a first set of SSB indexes, and the second TRP corresponds to a second set of SSB indexes; the target TRP is the first TRP in response to the indication field corresponding to the SSB index indicating that the SSB index belongs to the first set of SSB indexes; and / or the target TRP is the second TRP in response to the indication field corresponding to the SSB index indicating that the SSB index belongs to the second set of SSB indexes.

[0146] In a possible implementation, the SSB indexes in the first set of SSB indexes are completely different from the SSB indexes in the second set of SSB indexes.

[0147] In a possible implementation, the first set of SSB indexes includes at least one first SSB index, and the first SSB index is an index of an SSB transmitted by the first TRP; and the second set of SSB indexes includes at least one second SSB index, and the second SSB index is an index other than the index of the SSB transmitted by the first TRP.

[0148] In a possible implementation, the SSB indexes in the second set of SSB indexes have a corresponding relationship with the SSB indexes in the first set of SSB indexes.

[0149] In a possible implementation, the first indication field is an indication field corresponding to an UL / SUL indicator; the target TRP is the first TRP in response to the indication field corresponding to the UL / SUL indicator taking a first value; and / or the target TRP is the second TRP in response to the indication field corresponding to the UL / SUL indicator taking a second value.

[0150] In a possible implementation, in response to the serving cell not configuring the SUL carrier, the first indication field is an indication field corresponding to the UL / SUL indicator; and / or, in response to the serving cell configuring the SUL carrier, the first indication field is an indication field corresponding to the cell identification indicator or an indication field corresponding to the SSB index.

[0151] The communication unit 501 and the processing unit 502 will be described in more detail below with reference to the terminal device in the embodiments of FIGS. 2-4.

[0152] For the case where the communication apparatus 50 is configured to implement the functions of the first TRP in the embodiments of FIGS. 2-4:

[0153] The processing unit 502 is configured to invoke the communication unit 501 to send a first message and first indication information, the first message being used to trigger a PRACH, and the first indication information indicating that the PRACH is associated with a target TRP; wherein the target TRP includes a first TRP or a second TRP, the first TRP supporting receiving uplink signals from a terminal device and supporting sending downlink signals to the terminal device, and the second TRP only supporting receiving uplink signals from the terminal device.

[0154] The processing unit 502 is further configured to invoke the communication unit 501 to receive the PRACH based on the first indication information.

[0155] In a possible implementation, the first message is a PDCCH order, and the first indication information is carried in a first indication field in the PDCCH order.

[0156] In a possible implementation, the first indication field is an indication field corresponding to a cell identification indicator; in response to the indication field corresponding to the cell identification indicator indicating a first cell identification, the target TRP is the first TRP; and / or, in response to the indication field corresponding to the cell identification indicator indicating a second cell identification, the target TRP is the second TRP.

[0157] In a possible implementation, the first cell identification is a physical cell identification (PCI) of a cell corresponding to the first TRP, the second cell identification is a virtual cell identification of a cell corresponding to the second TRP, and the virtual cell identification of the cell corresponding to the second TRP is different from the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP; or, the first cell identification is the PCI of the cell corresponding to the first TRP, the second cell identification is the PCI of the cell corresponding to the second TRP, and the PCI of the cell corresponding to the first TRP is different from the PCI of the cell corresponding to the second TRP.

[0158] In a possible implementation, the first indication field is an indication field corresponding to an SSB index; the first TRP corresponds to a first set of SSB indexes, and the second TRP corresponds to a second set of SSB indexes; in response to the SSB index indicated by the indication field corresponding to the SSB index belonging to the first set of SSB indexes, the target TRP is the first TRP; and / or, in response to the SSB index indicated by the indication field corresponding to the SSB index belonging to the second set of SSB indexes, the target TRP is the second TRP.

[0159] In a possible implementation, the SSB indexes in the first set of SSB indexes are completely different from the SSB indexes in the second set of SSB indexes.

[0160] In a possible implementation, the first set of SSB indexes includes at least one first SSB index, and the first SSB index is an index of an SSB transmitted by the first TRP; the second set of SSB indexes includes at least one second SSB index, and the second SSB index is an index other than the index of the SSB transmitted by the first TRP.

[0161] In a possible implementation, the SSB indexes in the second set of SSB indexes have a corresponding relationship with the SSB indexes in the first set of SSB indexes.

[0162] In a possible implementation, the first indication field is an indication field corresponding to an UL / SUL indicator; in response to the value of the indication field corresponding to the UL / SUL indicator being a first value, the target TRP is the first TRP; and / or, in response to the value of the indication field corresponding to the UL / SUL indicator being a second value, the target TRP is the second TRP.

[0163] In a possible implementation, in response to the serving cell not being configured with a SUL carrier, the first indication field is an indication field corresponding to an UL / SUL indicator; and / or, in response to the serving cell being configured with a SUL carrier, the first indication field is an indication field corresponding to a cell identity indicator or an indication field corresponding to an SSB index.

[0164] For a more detailed description of the communication unit 501 and the processing unit 502, refer to the description of the first TRP in the corresponding embodiments of FIGS. 2-4, which will not be repeated here.

[0165] For the case where the communication apparatus 50 is configured to implement the functions of the second TRP in the corresponding embodiments of FIGS. 2-4:

[0166] The processing unit 502 is configured to invoke the communication unit 501 to receive the PRACH based on the first indication information; the first indication information indicates that the PRACH is associated with a target TRP, and the PRACH is triggered by a first message sent by a first TRP; wherein the target TRP includes the first TRP or a second TRP, the first TRP supports receiving an uplink signal from the terminal device and supports sending a downlink signal to the terminal device, and the second TRP only supports receiving an uplink signal from the terminal device.

[0167] In a possible implementation, the first message is a PDCCH command, and the first indication information is carried in a first indication field in the PDCCH command.

[0168] In a possible implementation, the first indication field is an indication field corresponding to a cell identity indicator; in response to the indication field corresponding to the cell identity indicator indicating a first cell identity, the target TRP is the first TRP; and / or, in response to the indication field corresponding to the cell identity indicator indicating a second cell identity, the target TRP is the second TRP.

[0169] In a possible implementation, the first cell identity is a physical cell identity (PCI) of a cell corresponding to the first TRP, and the second cell identity is a virtual cell identity of a cell corresponding to the second TRP, the virtual cell identity of the cell corresponding to the second TRP being different from the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP; or, the first cell identity is the PCI of the cell corresponding to the first TRP, and the second cell identity is the PCI of the cell corresponding to the second TRP, the PCI of the cell corresponding to the first TRP being different from the PCI of the cell corresponding to the second TRP.

[0170] In a possible implementation, the first indication field is an indication field corresponding to an SSB index; the first TRP corresponds to a first SSB index set, and the second TRP corresponds to a second SSB index set; in response to the indication field corresponding to the SSB index indicating that the SSB index belongs to the first SSB index set, the target TRP is the first TRP; and / or, in response to the indication field corresponding to the SSB index indicating that the SSB index belongs to the second SSB index set, the target TRP is the second TRP.

[0171] In a possible implementation, the SSB indexes in the first SSB index set are completely different from the SSB indexes in the second SSB index set.

[0172] In a possible implementation, the first SSB index set includes at least one first SSB index, and the first SSB index is an index of an SSB sent by the first TRP; the second SSB index set includes at least one second SSB index, and the second SSB index is an index other than the index of the SSB sent by the first TRP.

[0173] In a possible implementation, the SSB indexes in the second SSB index set have a correspondence relationship with the SSB indexes in the first SSB index set.

[0174] In a possible implementation, the first indication field is an indication field corresponding to a UL / SUL indicator; in response to a value of the indication field corresponding to the UL / SUL indicator being a first value, the target TRP is the first TRP; and / or, in response to the value of the indication field corresponding to the UL / SUL indicator being a second value, the target TRP is the second TRP.

[0175] In a possible implementation, in response to the serving cell not being configured with a SUL carrier, the first indication field is an indication field corresponding to a UL / SUL indicator; and / or, in response to the serving cell being configured with a SUL carrier, the first indication field is an indication field corresponding to a cell identity indicator or an indication field corresponding to an SSB index.

[0176] For more details of the communication unit 501, the processing unit 502, refer to the description of the second TRP in the corresponding embodiments of FIG. 2-FIG. 4, which will not be repeated here.

[0177] Please refer to FIG. 6, which is a structural schematic diagram of another communication apparatus provided by the embodiments of the present application. As shown in FIG. 6, the communication apparatus 60 can include one or more processors 601, which can also be referred to as processing units, and can implement certain control functions. The processor 601 can be a general-purpose processor or a special-purpose processor, etc. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication apparatus (such as a base station, a baseband chip, a terminal, a terminal chip, a DU or a CU, etc.), execute software programs, and process data of the software programs.

[0178] In an optional design, the processor 601 can also store instructions 603 and / or data, which can be executed by the processor to make the communication apparatus 60 perform the methods described in the above method embodiments.

[0179] In another optional design, the processor 601 can include a transceiver unit for implementing receiving and transmitting functions. For example, the transceiver unit can be a transceiver circuit, or an interface, or an interface circuit, or a communication interface. The transceiver circuit, the interface, or the interface circuit for implementing the receiving and transmitting functions can be separate or integrated together. The transceiver circuit, the interface, or the interface circuit described above can be used for reading and writing of codes / data, or the transceiver circuit, the interface, or the interface circuit described above can be used for transmission or transfer of signals.

[0180] In yet another possible design, the communication device 60 can include circuitry that can implement the functions of the sending or receiving or communicating in the foregoing method embodiments.

[0181] Optionally, the communication device 60 can include one or more memories 602, which can store instructions 604 and / or data, which can be run on the processor, so that the communication device 60 performs the methods described in the foregoing method embodiments. Optionally, the memory can also store data. Optionally, the processor can also store instructions and / or data. The processor and the memory can be separately arranged, or integrated together. For example, the correspondence described in the foregoing method embodiments can be stored in the memory, or stored in the processor.

[0182] Optionally, the communication device 60 can further include a transceiver 605 and / or an antenna 606. The processor 601 can be referred to as a processing unit, which controls the communication device 60. The transceiver 605 can be referred to as a transceiving unit, a transceiver, a transceiving circuit, a transceiving device, or a transceiving module, etc., which is used to implement the transceiving function.

[0183] Optionally, the communication device 60 in the embodiments of the present application can be used to perform the methods described in the corresponding embodiments of FIG. 2-FIG. 4.

[0184] In one embodiment, the communication device 60 can be a terminal device, or a device (for example, a chip, or a chip system, or a circuit) in the terminal device. When the computer program instructions stored in the memory 602 are executed, the transceiver 605 is configured to perform the operations performed by the communication unit 501 in the foregoing embodiments, and the transceiver 605 is further configured to send information to other communication devices outside the communication device. The terminal device or the device in the terminal device can also be used to perform various methods performed by the terminal device in the corresponding embodiments of FIG. 2-FIG. 4, which will not be repeated here.

[0185] In one embodiment, the communication device 60 can be a first TRP or a second TRP, or a device (for example, a chip, or a chip system, or a circuit) in the first TRP or the second TRP. When the computer program instructions stored in the memory 602 are executed, the transceiver 605 is configured to perform the operations performed by the communication unit 501 in the foregoing embodiments. The first TRP or the second TRP, or the device in the first TRP or the second TRP can also be used to perform various methods performed by the first TRP or the second TRP in the corresponding embodiments of FIG. 2-FIG. 4, which will not be repeated here.

[0186] The processors and transceivers described in this application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency interface chip (RFIC), a mixed-signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processors and transceivers can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), positive channel metal oxide semiconductor (PMOS), Bipolar Junction Transistor (BJT), BiCMOS, silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0187] The structure of the apparatus described in this application can not be limited by FIG. 6. The apparatus can be a standalone device or can be a part of a larger device. For example, the apparatus can be:

[0188] (1) a standalone integrated circuit (IC), or a chip, or a chip system or subsystem;

[0189] (2) a set of one or more ICs, optionally, the set of ICs can also include a storage component for storing data and / or instructions;

[0190] (3) an ASIC, such as a Mobile Station Modem (MSM);

[0191] (4) a module that can be embedded within other devices;

[0192] (5) a receiver, a terminal, a smart terminal, a cellular phone, a wireless device, a handset, a mobile unit, a car device, a network device, a cloud device, an artificial intelligence device, a machine device, a home device, a medical device, an industrial device, etc.

[0193] (6) others, etc.

[0194] Please refer to FIG. 7, which is a structural schematic diagram of a terminal device provided in an embodiment of the present application. For ease of illustration, FIG. 7 only shows main components of the terminal device. As shown in FIG. 7, the terminal device 70 includes a processor, a memory, a control circuit, an antenna, and an input / output device. The processor is mainly used for processing communication protocols and communication data, controlling the whole terminal device, executing software programs, and processing data of the software programs. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by a user and outputting data to the user.

[0195] When the terminal device is powered on, the processor can read the software programs in the storage unit, parse and execute instructions of the software programs, and process data of the software programs. When data needs to be transmitted wirelessly, the processor performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit processes the baseband signal to obtain a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna. The radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor. The processor converts the baseband signal into data and processes the data.

[0196] For ease of illustration, FIG. 7 only shows one memory and one processor. In an actual terminal device, multiple processors and memories can exist. The memory can also be referred to as a storage medium or a storage device, etc., and the embodiments of the present application do not limit this.

[0197] As an optional implementation manner, the processor can include a baseband processor and a central processor. The baseband processor is mainly used for processing communication protocols and communication data. The central processor is mainly used for controlling the whole terminal device, executing software programs, and processing data of the software programs. The processor in FIG. 7 integrates the functions of the baseband processor and the central processor. Those skilled in the art can understand that the baseband processor and the central processor can also be independent processors interconnected through a bus or the like. Those skilled in the art can understand that the terminal device can include multiple baseband processors to adapt to different network modes, and the terminal device can include multiple central processors to enhance the processing capability. The components of the terminal device can be connected through various buses. The baseband processor can also be referred to as a baseband processing circuit or a baseband processing chip. The central processor can also be referred to as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built in the processor, or the function can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

[0198] In one example, the antenna and control circuit with transceiving function can be regarded as a transceiving unit 701 of the terminal device 70, and the processor with processing function can be regarded as a processing unit 702 of the terminal device 70. As shown in FIG. 7, the terminal device 70 includes the transceiving unit 701 and the processing unit 702. The transceiving unit can also be referred to as a transceiver, a transceiver, a transceiver, etc. Optionally, the device for realizing the receiving function in the transceiving unit 701 can be regarded as a receiving unit, and the device for realizing the sending function in the transceiving unit 701 can be regarded as a sending unit, that is, the transceiving unit 701 includes the receiving unit and the sending unit. Exemplarily, the receiving unit can also be referred to as a receiver, a receiver, a receiving circuit, etc., and the sending unit can be referred to as a transmitter, a transmitter, or a transmitting circuit, etc. Optionally, the above-mentioned receiving unit and sending unit can be integrated into one unit, or can be multiple units independent of each other. The above-mentioned receiving unit and sending unit can be in one geographical location, or can be dispersed in multiple geographical locations.

[0199] In one embodiment, the transceiving unit 701 is configured to perform the operations performed by the communication unit 501 in the above-mentioned embodiments. The terminal device 70 can also be configured to perform various methods performed by the terminal device in the corresponding embodiments of FIGS. 2-4, which will not be repeated here.

[0200] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program. The program is executed by a processor to implement the processes related to the terminal device in the methods provided by the above-mentioned method embodiments.

[0201] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program. The program is executed by a processor to implement the processes related to the terminal device in the methods provided by the above-mentioned method embodiments.

[0202] The embodiments of the present application also provide a computer program product, which, when running on a computer or a processor, causes the computer or the processor to execute one or more steps in any of the above-mentioned methods. The constituent modules of the devices involved in the above-mentioned embodiments, if realized in the form of software function units and sold or used as independent products, can be stored in a computer readable storage medium.

[0203] The embodiments of the present application also provide a chip system, which comprises at least one processor and an interface circuit, the interface circuit and the at least one processor are interconnected through a line, and the at least one processor is configured to execute computer programs or instructions, so that any one of the steps described in the embodiments of FIG. 2-FIG. 4 is executed partially or entirely. In a possible implementation, the chip system can further comprise at least one memory, the interface circuit, the at least one memory and the at least one processor are interconnected through a line, and the at least one memory stores instructions, which are executed by the processor, so that any one of the steps described in the embodiments of FIG. 2-FIG. 4 is executed partially or entirely. The chip system can be composed of a chip, or can comprise a chip and other discrete devices.

[0204] The embodiments of the present application also provide a communication system, which comprises a terminal device, a first TRP and a second TRP, and the specific description can refer to the method shown in the embodiments of FIG. 2-FIG. 4.

[0205] It should be appreciated that the memory mentioned 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 hard disk drive (HDD), a solid-state drive (SSD), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, but not limitation, many forms of RAM can be used, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). The memory is any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto. The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, used for storing program instructions and / or data.

[0206] It should also be understood that the processor mentioned in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0207] It should be noted that when the processor is a general processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated in the processor.

[0208] It should be noted that the memory described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0209] It should be understood that the size of the sequence number of the above-mentioned processes in various embodiments of the present application does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0210] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments provided herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0211] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0212] In several embodiments provided by the present application, it should be understood that the disclosed system, device and method can be realized by other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0213] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0214] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0215] If the functions are implemented in the form of software functional units and sold or used as independent products, the software functional units can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the parts of the technical solutions that essentially contribute to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, and various program code storage media.

[0216] The steps in the method embodiments of the present application can be adjusted in sequence, combined, and reduced according to actual needs.

[0217] The modules / units in the device embodiments of the present application can be combined, divided, and reduced according to actual needs.

[0218] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A communication method characterized by comprising: The method comprises: receiving a first message and first indication information, the first message being used for triggering a physical random access channel (PRACH), and the first indication information indicating that the PRACH is associated with a target transmission and reception point (TRP); wherein the target TRP comprises a first TRP or a second TRP, the first TRP supporting receiving uplink signals from a terminal device and supporting transmitting downlink signals to the terminal device, and the second TRP only supporting receiving uplink signals from the terminal device; based on the first indication information, transmitting the PRACH to the target TRP.

2. The method of claim 1, wherein, The first message is a physical downlink control channel (PDCCH) command, and the first indication information is carried in a first indication field in the PDCCH command.

3. The method of claim 2, wherein, The first indication field is an indication field corresponding to a cell identifier indicator; in response to the indication field corresponding to the cell identifier indicator indicating a first cell identifier, the target TRP is the first TRP; and / or, in response to the indication field corresponding to the cell identifier indicator indicating a second cell identifier, the target TRP is the second TRP.

4. The method of claim 3, wherein: the first cell identifier is a physical cell identifier (PCI) of a cell corresponding to the first TRP, and the second cell identifier is a virtual cell identifier of a cell corresponding to the second TRP, the virtual cell identifier of the cell corresponding to the second TRP being different from the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP; or, the first cell identifier is the PCI of the cell corresponding to the first TRP, and the second cell identifier is the PCI of the cell corresponding to the second TRP, the PCI of the cell corresponding to the first TRP being different from the PCI of the cell corresponding to the second TRP.

5. The method of claim 2, wherein, The first indication field is an indication field corresponding to a synchronization signal block (SSB) index; the first TRP corresponds to a first SSB index set, and the second TRP corresponds to a second SSB index set; in response to the SSB index corresponding to the indication field indicating that the SSB index belongs to the first SSB index set, the target TRP is the first TRP; and / or, in response to the SSB index corresponding to the indication field indicating that the SSB index belongs to the second SSB index set, the target TRP is the second TRP.

6. The method of claim 5, wherein, The SSB indexes in the first SSB index set are completely different from the SSB indexes in the second SSB index set.

7. The method of claim 5 or 6, wherein: the first SSB index set comprises at least one first SSB index, and the first SSB index is an index of an SSB transmitted by the first TRP; the second SSB index set comprises at least one second SSB index, and the second SSB index is an index other than the index of the SSB transmitted by the first TRP.

8. The method of claim 7, wherein, The SSB indexes in the second SSB index set have a corresponding relationship with the SSB indexes in the first SSB index set.

9. The method of claim 2, wherein, The first indication field is an indication field corresponding to an uplink / supplementary uplink UL / SUL indicator; In response to the indication field corresponding to the UL / SUL indicator taking a first value, the target TRP is the first TRP; and / or, In response to the indication field corresponding to the UL / SUL indicator taking a second value, the target TRP is the second TRP.

10. The method of claim 9, wherein, In response to the serving cell not configuring a SUL carrier, the first indication field is an indication field corresponding to the UL / SUL indicator; and / or, In response to the serving cell configuring a SUL carrier, the first indication field is an indication field corresponding to a cell identity indicator or an indication field corresponding to an SSB index.

11. A communication method characterized by comprising: The method comprises: receiving a physical random access channel PRACH based on first indication information, the first indication information indicating that the PRACH is associated with a target transmission and reception point TRP, the PRACH being triggered by a first message, the first message being sent by a first TRP; wherein the target TRP comprises the first TRP or a second TRP, the first TRP supporting receiving uplink signals from a terminal device and supporting sending downlink signals to the terminal device, and the second TRP only supporting receiving uplink signals from the terminal device.

12. The method of claim 11, wherein, The first message is a physical downlink control channel PDCCH order, and the first indication information is carried through a first indication field in the PDCCH order.

13. The method of claim 12, wherein, The first indication field is an indication field corresponding to a cell identity indicator; In response to the indication field corresponding to the cell identity indicator indicating a first cell identity, the target TRP is the first TRP; and / or, In response to the indication field corresponding to the cell identity indicator indicating a second cell identity, the target TRP is the second TRP.

14. The method of claim 13, wherein, The first cell identity is a physical cell identity PCI of a cell corresponding to the first TRP, and the second cell identity is a virtual cell identity of a cell corresponding to the second TRP, the virtual cell identity of the cell corresponding to the second TRP being different from the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP; or, The first cell identity is a PCI of a cell corresponding to the first TRP, and the second cell identity is a PCI of a cell corresponding to the second TRP, the PCI of the cell corresponding to the first TRP being different from the PCI of the cell corresponding to the second TRP.

15. The method of claim 12, wherein, The first indication field is an indication field corresponding to a synchronization signal block SSB index; the first TRP corresponds to a first set of SSB indexes, and the second TRP corresponds to a second set of SSB indexes; In response to the SSB index indicated by the indication field corresponding to the SSB index belonging to the first set of SSB indexes, the target TRP is the first TRP; and / or, In response to the SSB index indicated by the indication field corresponding to the SSB index belonging to the second set of SSB indexes, the target TRP is the second TRP.

16. The method of claim 15, wherein, The SSB indexes in the first SSB index set are completely different from the SSB indexes in the second SSB index set.

17. The method of claim 15 or 16, wherein, The first SSB index set includes at least one first SSB index, and the first SSB index is an index of an SSB transmitted by the first TRP. The second SSB index set includes at least one second SSB index, and the second SSB index is an index other than an index of an SSB transmitted by the first TRP.

18. The method of claim 17, wherein, The SSB indexes in the second SSB index set have a correspondence relationship with the SSB indexes in the first SSB index set.

19. The method of claim 12, wherein, The first indication field is an indication field corresponding to an uplink / supplementary uplink (UL / SUL) indicator; In response to a value of the indication field corresponding to the UL / SUL indicator being a first value, the target TRP is the first TRP. and / or, In response to the value of the indication field corresponding to the UL / SUL indicator being a second value, the target TRP is the second TRP.

20. The method of claim 19, wherein, In response to a serving cell not configuring a SUL carrier, the first indication field is an indication field corresponding to the UL / SUL indicator. and / or, In response to a serving cell configuring a SUL carrier, the first indication field is an indication field corresponding to a cell identity indicator or an indication field corresponding to an SSB index.

21. A communications device, characterized by The apparatus includes units for performing the method of any of claims 1-10; or, the apparatus includes units for performing the method of any of claims 11-20.

22. A communications device, characterized by The apparatus includes a processor configured to execute a computer program or instructions in a memory, when the computer program or instructions are executed by the processor, the apparatus performs the method of any of claims 1-10, or performs the method of any of claims 11-20.

23. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program or computer instructions, when the computer program or computer instructions are executed by a processor, the terminal device performs the method of any of claims 1-10, or the first transmission and reception point (TRP) or the second TRP performs the method of any of claims 11-20; wherein the first TRP supports receiving an uplink signal from the terminal device and supports transmitting a downlink signal to the terminal device, and the second TRP only supports receiving an uplink signal from the terminal device.

24. A chip system, characterized by The terminal device comprises at least one processor, at least one memory and interface circuit, the at least one memory, the interface circuit and the at least one processor are interconnected by lines, and the at least one memory stores instructions; when the instructions are executed by the processor, the terminal device executes the method in any one of claims 1-10, or the first transmission and reception point (TRP) or the second TRP executes the method in any one of claims 11-20; wherein the first TRP supports receiving uplink signals from the terminal device and supports transmitting downlink signals to the terminal device, and the second TRP only supports receiving uplink signals from the terminal device.

25. A communication system, characterized by The terminal device comprises at least one processor, at least one memory and interface circuit, the at least one memory, the interface circuit and the at least one processor are interconnected by lines, and the at least one memory stores instructions; when the instructions are executed by the processor, the terminal device executes the method in any one of claims 1-10, or the first transmission and reception point (TRP) or the second TRP executes the method in any one of claims 11-20; wherein the first TRP supports receiving uplink signals from the terminal device and supports transmitting downlink signals to the terminal device, and the second TRP only supports receiving uplink signals from the terminal device.

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