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

Abstract

The invention provides a communication method and device, a storage medium, a chip system and a communication system, and the method can comprise the steps: receiving a first message and first indication information, the first message is used for triggering a physical random access channel (PRACH), and the first indication information indicates 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 supports to receive an uplink signal from the terminal equipment and supports to send a downlink signal to the terminal equipment, and the second TRP only supports to receive the uplink signal from the terminal equipment; and sending the PRACH to the first TRP based on the first indication information. In this way, the reliability of PRACH transmission can be ensured.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method, apparatus, storage medium, chip system, and communication system. Background Technology

[0002] For a downlink (DL) single transmission and reception point (sTRP) and an uplink (UL) multi-TRP (mTRP) deployment, a single TRP transmits downlink signals and multiple TRPs receive uplink signals, which can enhance uplink coverage.

[0003] For example, taking a single TRP as TRP1, and the multiple TRPs including TRP1 and TRP2 as an example, the network device sends DL signals to the terminal device through TRP1, and receives UL signals from the terminal device through TRP1 and / or TRP2. For DL ​​sTRP & ULmTRP deployment, the Physical Random Access Channel (PRACH) sent by the terminal device can be sent to either TRP1 or TRP2.

[0004] Because different power control mechanisms are required for PRACH transmissions to TRP1 and TRP2, the transmission power of PRACH sent to TRP1 can be determined based on the path loss (PL) measured from the DL reference signal (RS) of TRP1. For PRACH transmissions to TRP2, the transmission power can be determined based on the PL measured from the DL RS of TRP1 and a PL offset. Therefore, determining whether a PRACH is sent to TRP1 or TRP2 is a pressing technical problem that needs to be solved. Summary of the Invention

[0005] This application discloses a communication method, apparatus, storage medium, chip system, and communication system. The first indication information can instruct the sending of PRACH to the target TRP, thereby helping to ensure the reliability of PRACH transmission.

[0006] In a first aspect, embodiments of this application provide a communication method. This method can be applied to a terminal device, or to a device within the terminal device (e.g., a chip, a chip system, or a circuit), or to a device compatible with the terminal device. The following description uses an application to a terminal device as an example. The method may include: receiving a first message and first indication information, wherein 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 supporting receiving uplink signals from the terminal device and supporting sending downlink signals to the terminal device, and the second TRP only supporting receiving uplink signals from the terminal device; and sending a PRACH to the target TRP based on the first indication information.

[0007] In this technical solution, the first indication information can be used to instruct the transmission of PRACH to the target TRP, which helps to accurately determine the transmission power of PRACH and thus helps to ensure the reliability of PRACH transmission.

[0008] In one possible implementation, the first message is a physical downlink control channel (PDCCH) order, and the first indication information is carried through the first indication field in the PDCCH order.

[0009] In this technical solution, the first indication field can be an existing bit field in the PDCCHorder. By reusing existing information fields in the PDCCHorder, no additional signaling overhead is added. Alternatively, the first indication field can be a newly added bit field in the PDCCHorder.

[0010] In one possible implementation, the first indication field is the indication field corresponding to the cell identifier indicator; in response to the indication field corresponding to the cell identifier indicator indicating the 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 the second cell identifier, the target TRP is the second TRP.

[0011] In this technical solution, the content indicated by the indication field corresponding to the cell identifier indicator in the PDCCHorder can determine whether the target TRP is the first TRP or the second TRP, regardless of whether it is an intra-cell UL multi-TRP scenario or an inter-cell UL multi-TRP scenario. In contrast, the method of indicating the target TRP through the PRACH association indicator bit field in the PDCCHorder cannot determine which TRP is the target TRP in the intra-cell UL multi-TRP scenario.

[0012] In one possible implementation, the first cell identifier is the physical cell identifier (PCI) of the cell corresponding to the first TRP, and the second cell identifier is the virtual cell identifier of the cell corresponding to the second TRP. The virtual cell identifier of the cell corresponding to the second TRP is different from both the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP. Alternatively, 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 is different from the PCI of the cell corresponding to the second TRP.

[0013] In one possible implementation, the first indication field is the indication field corresponding to the Synchronization Signal / PBCH Block (SSB) index; the first TRP corresponds to the first SSB index set, and the second TRP corresponds to the second SSB index set; in response to the SSB index indicated by the indication field 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 field corresponding to the SSB index belonging to the second SSB index set, the target TRP is the second TRP.

[0014] In this technical solution, the content indicated by the indicator field corresponding to the SSB index in the PDCCHorder can determine whether the target TRP is the first TRP or the second TRP, whether in an intra-cell UL multi-TRP scenario or an inter-cell UL multi-TRP scenario.

[0015] In one possible implementation, the SSB indexes in the first SSB index set are completely different from the SSB indexes in the second SSB index set.

[0016] In one possible implementation, the first SSB index set includes at least one first SSB index, which is the index of the SSB sent by the first TRP; the second SSB index set includes at least one second SSB index, which is an index other than the index of the SSB sent by the first TRP.

[0017] In one possible implementation, the SSB indices in the second SSB index set correspond to the SSB indices in the first SSB index set.

[0018] In one possible implementation, the first indication field is the indication field corresponding to the Uplink (UL) / Supplementary Uplink (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 a 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 a second TRP.

[0019] In this technical solution, the content indicated by the indication field corresponding to the UL / SUL indicator in the PDCCHorder can determine whether the target TRP is the first TRP or the second TRP, whether in an intra-cell UL multi-TRP scenario or an inter-cell UL multi-TRP scenario.

[0020] In one 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 indicator or the indication field corresponding to the SSB index.

[0021] In this technical solution, by determining whether the serving cell is configured with a SUL carrier, it is possible to quickly determine which indication field in the PDCCH order the first indication information is carried in, which is beneficial for quickly determining whether the target TRP is the first TRP or the second TRP.

[0022] Secondly, embodiments of this application provide another communication method. This method can be applied to a first TRP or a second TRP, or to devices (e.g., chips, chip systems, or circuits) within the first or second TRP, or to devices compatible with the first or second TRP. The method may include: receiving a PRACH based on first indication information; the first indication information indicates that the PRACH is associated with a target TRP, the PRACH is triggered by a first message, and the first message is sent by the first TRP; wherein the target TRP includes either the first or second TRP, the first TRP supports receiving uplink signals from the terminal device and supports sending downlink signals to the terminal device, and the second TRP only supports receiving uplink signals from the terminal device.

[0023] In this technical solution, the first indication information determines that a PRACH can be sent to the target TRP. This helps the terminal device accurately determine the transmission power of the PRACH, thereby helping to ensure the reliability of PRACH transmission.

[0024] In one possible implementation, the first message is a PDCCH command, and the first indication information is carried through the first indication field in the PDCCH command.

[0025] In this technical solution, the first indication field can be an existing bit field in the PDCCHorder. By reusing existing information fields in the PDCCHorder, no additional signaling overhead is added. Alternatively, the first indication field can be a newly added bit field in the PDCCHorder.

[0026] In one possible implementation, the first indication field is the indication field corresponding to the cell identifier indicator; in response to the indication field corresponding to the cell identifier indicator indicating the 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 the second cell identifier, the target TRP is the second TRP.

[0027] In this technical solution, the content indicated by the indication field corresponding to the cell identifier indicator in the PDCCHorder can determine whether the target TRP is the first TRP or the second TRP, regardless of whether it is an intra-cell UL multi-TRP scenario or an inter-cell UL multi-TRP scenario. In contrast, the method of indicating the target TRP through the PRACH association indicator bit field in the PDCCHorder cannot determine which TRP is the target TRP in the intra-cell UL multi-TRP scenario.

[0028] In one possible implementation, the first cell identifier is the physical cell identifier (PCI) of the cell corresponding to the first TRP, and the second cell identifier is the virtual cell identifier of the cell corresponding to the second TRP. The virtual cell identifier of the cell corresponding to the second TRP is different from both the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP. Alternatively, 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 is different from the PCI of the cell corresponding to the second TRP.

[0029] In one possible implementation, the first indicator field is the indicator field corresponding to the SSB index; the first TRP corresponds to the first SSB index set, and the second TRP corresponds to the second SSB index set; in response to the SSB index indicated by the indicator field 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 indicator field corresponding to the SSB index belonging to the second SSB index set, the target TRP is the second TRP.

[0030] In this technical solution, the content indicated by the indicator field corresponding to the SSB index in the PDCCHorder can determine whether the target TRP is the first TRP or the second TRP, whether in an intra-cell UL multi-TRP scenario or an inter-cell UL multi-TRP scenario.

[0031] In one possible implementation, the SSB indexes in the first SSB index set are completely different from the SSB indexes in the second SSB index set.

[0032] In one possible implementation, the first SSB index set includes at least one first SSB index, which is the index of the SSB sent by the first TRP; the second SSB index set includes at least one second SSB index, which is an index other than the index of the SSB sent by the first TRP.

[0033] In one possible implementation, the SSB indices in the second SSB index set correspond to the SSB indices in the first SSB index set.

[0034] In one possible implementation, the first indication field is the indication field corresponding to the 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 a 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 a second TRP.

[0035] In this technical solution, the content indicated by the indication field corresponding to the UL / SUL indicator in the PDCCHorder can determine whether the target TRP is the first TRP or the second TRP, whether in an intra-cell UL multi-TRP scenario or an inter-cell UL multi-TRP scenario.

[0036] In one 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 indicator or the indication field corresponding to the SSB index.

[0037] In this technical solution, by determining whether the serving cell is configured with a SUL carrier, it is possible to quickly determine which indication field in the PDCCH order the first indication information is carried in, which is beneficial for quickly determining whether the target TRP is the first TRP or the second TRP.

[0038] Thirdly, embodiments of this application provide a communication device, which includes a module / unit for performing any method of the first aspect or any possible implementation of the first aspect. The device can be a terminal device, a module (e.g., a chip, chip system, or processor) applied to a terminal device, or a logical node, logical module, or software capable of implementing all or part of the functions of the terminal device.

[0039] Fourthly, embodiments of this application provide a communication device, which includes a module / unit for performing any method of the second aspect or any possible implementation of the second aspect. The device may be a first TRP or a second TRP, or a module (e.g., a chip, chip system, or processor) applied to the first TRP or the second TRP, or a logical node, logical module, or software capable of implementing all or part of the functions of the first TRP, or a logical node, logical module, or software capable of implementing all or part of the functions of the second TRP.

[0040] Fifthly, embodiments of this application provide a communication device, which can be a terminal device or a device within a terminal device (e.g., a chip, a chip system, or a circuit). The communication device may include a processor coupled to a memory for storing programs or instructions. When the program or instructions are executed by the processor, the communication device performs the methods described in the above-described method embodiments, executed by the terminal device or a device within the terminal device.

[0041] Sixthly, embodiments of this application provide a communication device, which may be a first TRP or a second TRP, or a device within the first TRP or the second TRP (e.g., a chip, a chip system, or a circuit). The communication device may include a processor coupled to a memory for storing programs or instructions. When the program or instructions are executed by the processor, the communication device performs the method executed by the first TRP or the second TRP in the above method embodiments, or performs the method executed by a device within the first TRP or the second TRP in the above method embodiments.

[0042] In a seventh aspect, embodiments of this application provide a computer-readable storage medium storing a computer program or computer instructions that, when executed on a computer, cause the computer to perform any of the methods described in the first aspect or any possible implementation of the first aspect, the second aspect or any possible implementation of the second aspect.

[0043] Eighthly, embodiments of this application provide a computer program product containing program instructions, which, when run on a computer, causes the computer to perform any of the methods described in the first aspect or any possible implementation of the first aspect, the second aspect or any possible implementation of the second aspect.

[0044] Ninthly, embodiments of this application provide a chip system including at least one processor and an interface circuit. The interface circuit and the at least one processor are interconnected via a circuit. The at least one processor is configured to execute a computer program or instructions to cause any one of the methods described in the first aspect or any possible implementation of the first aspect, or the second aspect or any possible implementation of the second aspect, to be executed. In one possible implementation, the chip system may further include at least one memory. The interface circuit, the at least one memory, and the at least one processor are interconnected via a circuit. The at least one memory stores instructions that, when executed by the processor, cause any one of the methods described in the first aspect or any possible implementation of the first aspect, or the second aspect or any possible implementation of the second aspect, to be executed. The chip system may be composed of a chip or may include chips and other discrete devices.

[0045] In a tenth aspect, embodiments of this application provide a communication system, which includes a terminal device, a first TRP, and a second TRP. When the terminal device, the first TRP, and the second TRP are running in the communication system, they are used to execute any one of the methods described in the first aspect or any possible implementation of the first aspect, the second aspect, or any possible implementation of the second aspect. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the architecture of a communication system applicable to the embodiments of this application;

[0047] Figure 2 This is a flowchart illustrating a communication method provided in an embodiment of this application;

[0048] Figure 3 This is a flowchart illustrating another communication method provided in an embodiment of this application;

[0049] Figure 4 This is a flowchart illustrating another communication method provided in an embodiment of this application;

[0050] Figure 5 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0051] Figure 6 This is a schematic diagram of another communication device provided in an embodiment of this application;

[0052] Figure 7 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0053] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0054] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0055] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] In this application, "at least one (item)" means one or more, "more than" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) 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.

[0057] In this application, "sending information to... (e.g., a terminal device)" can be understood as the destination of the information being the terminal device. This can include sending information directly or indirectly to the terminal device. "Receiving information from... (e.g., a terminal device)" or "receiving information from... (e.g., a terminal device)" can be understood as the source of the information being the terminal device, and can include receiving information directly or indirectly from the terminal device. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be interpreted similarly, and will not be elaborated further here.

[0058] In the description of this application, "instruction" can include direct and indirect instructions, as well as explicit and implicit instructions. The information indicated by a certain piece of information (such as the instruction information mentioned below) is called the information to be instructed. In specific implementations, there are many ways to instruct the information to be instructed. For example, the information to be instructed can be directly instructed, such as by instructing the information itself or its index. Alternatively, the information to be instructed can be indirectly indicated by instructing other information, where there is a relationship between the indicated other information and the information to be instructed. Another example is that only a part of the information to be instructed can be indicated, while the other parts are known or pre-agreed upon. Furthermore, the instruction of specific information can be achieved by using a pre-agreed (such as an agreement) arrangement of various pieces of information, thereby reducing instruction overhead to some extent.

[0059] To better understand the embodiments of this application, the system architecture involved in the embodiments of this application will be described first below:

[0060] This application's embodiments can be applied to long-term evolution (LTE) systems, 5th generation mobile communication (5G) systems, 6th generation mobile communication (6G) systems, and other communication systems evolving after 5G, as well as satellite communication and short-range wireless communication systems. The wireless communication systems mentioned in this application's embodiments include, but are not limited to, the three major application scenarios of 5G / 6G mobile communication systems, long-range Internet of Things (LoRa) systems, and vehicle-to-everything (V2X) systems. The three major application scenarios of 5G / 6G mobile communication systems are: enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communication (mMTC). The wireless communication system may include one or more access network devices and one or more terminal devices.

[0061] The following is based on Figure 1 The system architecture shown is explained as an example.

[0062] Please see Figure 1 , Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application. The communication system includes a radio access network (RAN) 100, which may include, but is not limited to, multiple transmission and reception points (TRPs) and at least one terminal device. The multiple TRPs include a first TRP and a second TRP. The first TRP supports receiving uplink signals from the terminal device and supports sending downlink signals to the terminal device. The second TRP only supports receiving uplink signals from the terminal device; that is, the second TRP only supports receiving uplink signals from the terminal device and does not support sending downlink signals to the terminal device. The number of first TRPs and the number of second TRPs can be one or more.

[0063] For example, Figure 1 Taking RAN100 as an example, where the number of the first TRP101, the second TRP102, and the terminal device 103 are all one, Figure 1 The number and form of the devices shown are for illustrative purposes and do not constitute a limitation on the embodiments of this application.

[0064] RAN100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment. Figure 1 (Not shown in the image). It should be noted that RAN100 can be a cellular system related to the 3rd Generation Partnership Project (3GPP), such as 4G, 5G mobile communication systems, or evolutionary systems beyond 5G (e.g., 6G mobile communication systems). RAN100 can also be an open access network (open RAN, O-RAN or ORAN), a cloud radio access network (CRAN), etc. RAN100 can also be a communication system integrating two or more of the above systems. It should be noted that... Figure 1 The number of the first TRP, second TRP, and terminal devices is merely illustrative and should not be considered as a specific limitation of this application. The terminal devices and TRPs involved in the system architecture will be described in detail below.

[0065] I. Terminal Equipment

[0066] Terminal equipment, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a device used to provide voice or data connectivity to users, and can also be an Internet of Things (IoT) device. For example, terminal equipment includes handheld devices with wireless connectivity, in-vehicle devices, etc. Currently, terminal devices can include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, in-vehicle devices (e.g., cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed trains, etc.), satellite terminals, virtual reality (VR) devices, augmented reality (AR) devices, smart point-of-sale (POS) machines, customer-premises equipment (CPE), wireless terminals in industrial control, smart home devices (e.g., refrigerators, televisions, air conditioners, electricity meters, etc.), intelligent robots, robotic arms, workshop equipment, wireless terminals in autonomous driving, wireless terminals in telemedicine, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, and flying equipment (e.g., intelligent robots, hot air balloons, drones, airplanes), etc. Terminal devices can also be other devices with terminal functions; for example, a terminal device can also be a device that performs terminal functions in D2D communication.

[0067] The embodiments of this application do not limit the device form of the terminal device. The device used to implement the function of the terminal device can be the terminal device itself; it can also be a device that supports the terminal device in implementing the function, such as a chip system. The device can be installed in the terminal device or used in conjunction with the terminal device. In the embodiments of this application, the chip system can be composed of chips or can include chips and other discrete components.

[0068] II. Transmission and Reception Point (TRP)

[0069] In the embodiments of this application, a TRP can be understood as a physical transceiver point within a cell. One TRP can be a physical network site, such as a Remote Radio Head (RRH) or a base station; one TRP can also be composed of multiple physical network sites. This application does not limit the specific definition of a TRP. A TRP can also be referred to as a transmission and reception point.

[0070] In this embodiment, the first TRP, which supports receiving uplink signals from the terminal device and supporting sending downlink signals to the terminal device, may also be referred to as the primary TRP, downlink TRP, DL TRP, or other names. The second TRP, which only supports receiving uplink signals from the terminal device, may also be referred to as the secondary TRP, uplink TRP, UL TRP, or other names.

[0071] In this embodiment, the form of the first TRP and the second TRP is not limited. The device for implementing the function of the first TRP can be the first TRP itself, or it 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 itself, or it can be a device capable of supporting the second TRP to implement the function, such as a chip system. This device can be installed in the access network device or used in conjunction with the access network device.

[0072] The following is based on Figure 1 The system architecture shown illustrates in detail the communication method provided in the embodiments of this application. This communication method can indicate whether PRACH is sent to the first TRP or the second TRP, which helps to accurately determine the transmission power of PRACH and thus helps to ensure the reliability of PRACH transmission.

[0073] The following embodiments (as follows) Figures 2-4 The terminal device in the corresponding embodiment can be Figure 1 In the network architecture shown, the functions performed by the terminal devices in this embodiment can also be performed by devices within the terminal devices (e.g., chips, chip systems, or circuits). The first TRP in the following embodiments can be... Figure 1 The first TRP in the network architecture shown in this embodiment can also perform functions performed by devices within the first TRP (e.g., a chip, a chip system, or a circuit). The second TRP in the following embodiments can be... Figure 1 The functions performed by the second TRP in the network architecture shown in this embodiment can also be performed by devices (e.g., chips, chip systems, or circuits) within the second TRP. This embodiment is described uniformly here and will not be repeated hereafter.

[0074] Please see Figure 2 This is a flowchart illustrating a communication method provided in an embodiment of this application. The method may include, but is not limited to, the following steps:

[0075] S201, the terminal device receives 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. The target TRP includes a first TRP or a second TRP. The first TRP supports receiving uplink signals from the terminal device and supports sending downlink signals to the terminal device, while the second TRP only supports receiving uplink signals from the terminal device.

[0076] In this embodiment, the first message and the first indication information can be sent by the first TRP. Accordingly, the terminal device receives the first message and the first indication information from the first TRP, and then determines whether to send PRACH to the first TRP or the second TRP based on the first indication information.

[0077] The first indication information can be described as follows: PRACH is associated with the target TRP; PRACH uses the target TRP's PRACH configuration; the PRACH transmission power is determined by the path loss (PL)-RS associated with the target TRP and / or the PL offset associated with the target TRP; the PRACH transmission power is determined by the quasi-co-location (QCL)-RS associated with the target TRP; PRACH is sent to the target TRP; PRACH is sent to the target TRP; the receiver of the PRACH is the target TRP. These descriptions have the same meaning and can be used interchangeably.

[0078] When the target TRP is the first TRP, the PRACH transmission power can be determined by the PL-RS associated with the first TRP. When the target TRP is the second TRP, the PRACH transmission power can be determined by the PL-RS associated with the second TRP and / or the PL offset associated with the second TRP.

[0079] The target TRP and PL-RS can be associated through the state of the transmission configuration indication (TCI) corresponding to the target TRP. In other words, the PL-RS associated with the target TRP can also be described as: the PL-RS associated with the TCI state (corresponding to the target TRP).

[0080] The target TRP and the PL offset can be associated through the TCI state corresponding to the target TRP. In other words, the PL offset associated with the target TRP can also be described as: the PL offset associated with the TCI state (corresponding to the target TRP).

[0081] The target TRP and QCL-RS can be associated through the TCI state corresponding to the target TRP. In other words, the QCL-RS associated with the target TRP can also be described as: the QCL-RS associated with the TCI state (corresponding to the target TRP).

[0082] In one possible implementation, the first message can be a physical downlink control channel (PDCCH) order, which can trigger a non-contention-based PRACH. Alternatively, the first message can be higher-layer signaling, which in this embodiment may include Radio Resource Control (RRC) messages. For example, in a cell handover scenario, a PRACH can be triggered via an RRC message.

[0083] In one possible implementation, the first message may carry first indication information, meaning the first message and the first indication information are sent simultaneously. For example, the first message may be a PDCCH order, and the PDCCH order carries the first indication information. Alternatively, the first message may not carry the first indication information, meaning the first message and the message carrying the first indication information are different messages. In this case, the first message and the message carrying the first indication information may be sent simultaneously or separately; this application embodiment does not limit this. Furthermore, this application embodiment does not limit the sending order of the first message and the message carrying the first indication information. For example, the first TRP may send the first message first, or the first TRP may send the message carrying the first indication information first, or the first TRP may send the first message and the message carrying the first indication information simultaneously.

[0084] S202, the terminal device sends a PRACH to the target TRP based on the first indication information.

[0085] When the target TRP is the first TRP, the terminal device can determine the transmission power of PRACH based on the path loss (PL) measured by DLRS of the first TRP and send PRACH to the first TRP.

[0086] Similarly, when the target TRP is the second TRP, the terminal device can determine the PRACH transmission power based on the PL measured by the DLRS of the first TRP and a PL offset, and send the PRACH to the second TRP.

[0087] In this embodiment of the application, the first indication information can be used to instruct the transmission of PRACH to the target TRP, which helps to accurately determine the transmission power of PRACH and thus helps to ensure the reliability of PRACH transmission.

[0088] Please see Figure 3 This is a flowchart illustrating another communication method provided in an embodiment of this application. Figure 3 Taking the target TRP as the first TRP as an example, this method may include, but is not limited to, the following steps:

[0089] S301, the first TRP sends a first message and a first indication message. The first message is used to trigger a PRACH, and the first indication message indicates that the PRACH is associated with a target TRP; wherein, the target TRP includes either the first TRP or the second TRP. Correspondingly, the terminal device receives the first message and the first indication message.

[0090] The first TRP supports receiving uplink signals from the terminal device and sending downlink signals to the terminal device, while the second TRP only supports receiving uplink signals from the terminal device.

[0091] It should be noted that the relevant content of S301 can be found here. Figure 2 The specific description in S201 of the corresponding embodiment will not be repeated here.

[0092] S302, in response to the target TRP being the first TRP, the terminal device sends a PRACH to the first TRP based on the first indication information. Correspondingly, the first TRP receives the PRACH.

[0093] It should be noted that the relevant content of S302 can be found here. Figure 2 The specific description in S202 of the corresponding embodiment will not be repeated here.

[0094] Please see Figure 4 This is a flowchart illustrating another communication method provided in an embodiment of this application. Figure 4 Taking the second TRP as an example, this method may include, but is not limited to, the following steps:

[0095] S401, the first TRP sends a first message and a first indication message. The first message is used to trigger a PRACH, and the first indication message indicates that the PRACH is associated with a target TRP; wherein, the target TRP includes either the first TRP or the second TRP. Correspondingly, the terminal device receives the first message and the first indication message.

[0096] The first TRP supports receiving uplink signals from the terminal device and sending downlink signals to the terminal device, while the second TRP only supports receiving uplink signals from the terminal device.

[0097] It should be noted that the relevant content of S401 can be found here. Figure 2 The specific description in S201 of the corresponding embodiment will not be repeated here.

[0098] S402, in response to the target TRP being the second TRP, the terminal device sends a PRACH to the second TRP based on the first indication information. Correspondingly, the second TRP receives the PRACH.

[0099] It should be noted that the relevant content of S402 can be found here. Figure 2 The specific description in S202 of the corresponding embodiment will not be repeated here.

[0100] In one possible implementation, if the first message is a PDCCHorder and carries first indication information, the first indication information can be carried through the first indication field in the PDCCHorder.

[0101] Optionally, the first indicator field can be an existing bit field in the PDCCHorder, or it can be a newly added bit field in the PDCCHorder. This application embodiment does not limit the position of the first indicator field in the PDCCHorder; that is, it does not limit the position of the bits occupied by the first indicator field in the PDCCHorder.

[0102] In one possible implementation, the first indication field can be any of the following bit fields in the PDCCH order: the indication field corresponding to the cell indicator, the indication field corresponding to the Synchronization Signal / PBCH Block (SSB) index, or the indication field corresponding to the Uplink (UL) / Supplementary Uplink (SUL) indicator (UL / SUL indicator). Specifically, the indication field corresponding to the cell indicator can be the Cell indicator field, the indication field corresponding to the SSB index can be the SSB index field, and the indication field corresponding to the UL / SUL indicator can be the UL / SUL indicator field. This approach allows for the determination of whether the target TRP is the first or second TRP while reusing existing information fields in the PDCCH order without incurring additional signaling overhead.

[0103] Next, taking the first indication field as the indication field corresponding to the cell identifier indicator in PDCCHorder as an example, we will explain how to determine whether the target TRP is the first TRP or the second TRP by the content indicated by the indication field corresponding to the cell identifier indicator.

[0104] In one possible implementation, the target TRP is the first TRP if the indication field corresponding to the cell identifier indicator indicates a first cell identifier; and / or, the target TRP is the second TRP if the indication field corresponding to the cell identifier indicator indicates a second cell identifier. In other words, by determining whether the cell identifier indicated by the indication field corresponding to the cell identifier indicator is the first cell identifier or the second cell identifier, the target TRP can be quickly determined to be either the first or the second TRP.

[0105] In one possible implementation, the network device can configure a Virtual Cell Identifier (VCI) for each second TRP. For example, considering two second TRPs, namely second TRP1 and second TRP2, the network device can configure a VCI of 700 for second TRP1 and a VCI of 701 for second TRP2. Assuming the cell identifier indicated by the indication field of the cell identifier indicator is 700, then the target TRP is second TRP1.

[0106] Optionally, for a second TRP, the VCI of the second TRP may be associated with the PCI of the second TRP, that is, the VCI of the second TRP can be known through the PCI of the second TRP, and / or the PCI of the second TRP can be known through the VCI of the second TRP.

[0107] Optionally, for a second TRP, the value of the VCI of the second TRP is different from the value of the Physical Cell Identifier (PCI) of the TRP. In other words, the value can be used to distinguish whether it is the VCI or the PCI of the TRP.

[0108] In one possible implementation, the first cell identifier can be the PCI of the cell corresponding to the first TRP, and the second cell identifier can be the VCI of the cell corresponding to the second TRP. The VCI of the cell corresponding to the second TRP is different from both the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP. However, 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. This scenario can be understood as an intra-cell UL multi-TRP scenario. In this way, in the intra-cell UL multi-TRP scenario, in response to the indication field corresponding to the cell identifier indicating a PCI, the target TRP can be the first TRP. In one implementation, this first TRP can be the serving TRP; and / or, in response to the indication field corresponding to the cell identifier indicating a VCI, the target TRP can be the second TRP corresponding to that VCI. For example, in response to the indication field corresponding to the cell identifier indicating a VCI, the target TRP can be the second TRP corresponding to the PCI associated with that VCI. Among them, the serving TRP can refer to the TRP that provides services to the terminal device.

[0109] In one possible implementation, the first cell identifier can be the PCI of the cell corresponding to the first TRP, and the second cell identifier can be the PCI of the cell corresponding to the second TRP. The PCIs of the cells corresponding to the first and second TRPs are different. This difference in PCIs indicates that the cells corresponding to the first and second TRPs are different cells, a scenario that can be understood as an inter-cell UL multi-TRP scenario. In this way, in the inter-cell UL multi-TRP scenario, if the indicator field corresponding to the cell identifier indicates the PCI of the cell corresponding to the first TRP, then the target TRP can be that first TRP; and / or, if the indicator field corresponding to the cell identifier indicates the PCI of the cell corresponding to the second TRP, then the target TRP can be that second TRP.

[0110] As can be seen, the content indicated by the indication field corresponding to the cell identifier in the PDCCHorder can determine whether the target TRP is the first TRP or the second TRP in both intra-cell UL multi-TRP scenarios. In contrast, the method of indicating the target TRP through the PRACH association indicator bit field in the PDCCHorder cannot determine which TRP is the target TRP in the intra-cell UL multi-TRP scenario.

[0111] In inter-cell UL multi-TRP scenarios, the PRACH association indicator indicates whether the PRACH is sent to the serving cell or another cell. In intra-cell UL multi-TRP scenarios, the PRACH association indicator indicates whether the PRACH is sent to the serving TRP or another TRP besides the serving TRP. Specifically, 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 serves as the PL-RS. When the PRACH association indicator indicates that the PRACH is sent to another TRP besides 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 serves as the PL-RS.

[0112] In the intra-cell UL multi-TRP scenario, regardless of whether the PRACH is sent to the first TRP or the second TRP, the PDCCH order is sent by the first TRP. This means that the QCL-RS of the CORESET where the PDCCH order is located and the SSB index bit field in the PDCCH order indicate the same reference signal for the SSB. Therefore, in the intra-cell UL multi-TRP scenario, it is impossible to determine whether the target TRP is the first TRP or the second TRP.

[0113] Next, taking the first indicator field as the indicator field corresponding to the SSB index in PDCCHorder as an example, we will explain how to determine whether the target TRP is the first TRP or the second TRP by the content indicated by the indicator field corresponding to the SSB index.

[0114] In one possible implementation, 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 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 indicating that the SSB index belongs to the second SSB index set, the target TRP is the second TRP. In this implementation, by determining whether the SSB index indicated by the indicator field belongs to the first or second SSB index set, the target TRP can be quickly determined to be either the first or second TRP. Both the first and second SSB index sets can include one or more SSB indices.

[0115] In one possible implementation, the SSB indices in the first SSB index set are completely different from those in the second SSB index set. Alternatively, the SSB indices in the first SSB index set are partially different and partially the same as those in the second SSB index set.

[0116] In one possible implementation, the first SSB index set may include at least one first SSB index, which is the index of the SSB sent by the first TRP, or in other words, the index of the SSB actually sent by the first TRP. For example, assuming the first TRP can send a maximum of 64 SSBs, and these 64 SSBs are SSB#0 to SSB#63, in this embodiment, the number after the symbol "#" represents the SSB index. Assuming the first TRP actually sends 4 SSBs, and these 4 SSBs are SSB#0 to SSB#3, then the first SSB index set may include the index of at least one SSB among SSB#0 to SSB#3.

[0117] It should be noted that the indices of the SSBs actually sent in the first TRP can be consecutive or non-consecutive. For example, the first TRP may actually send 4 SSBs, namely SSB#0, SSB#2, SSB#4, and SSB#6, or the 4 SSBs may be SSB#0, SSB#1, SSB#4, and SSB#6.

[0118] Optionally, the SSB indices in the first SSB index set are all indices of the SSBs actually sent by the first TRP. Optionally, the first SSB index set includes indices of some or all of the SSBs actually sent by the first TRP. Alternatively, in addition to including indices of at least one SSB actually sent by the first TRP, the first SSB index set may also include a second SSB index, which is an index other than the indexes of the SSBs sent by the first TRP, or in other words, a second SSB index is an index other than the indexes of the SSBs actually sent by the first TRP.

[0119] Optionally, the second SSB index can be any SSB index within the range of values ​​for the SSB index corresponding to the first TRP, excluding the index of the SSB actually sent by the first TRP. Alternatively, the second SSB index can be an SSB index outside the range of values ​​for the SSB index corresponding to the first TRP. For example, assuming the first TRP can send a maximum of 64 SSBs, and these 64 SSBs are SSB#0 to SSB#63, and the first TRP actually sends 4 TRPs, with these 4 TRPs being SSB#0 to SSB#3 respectively, then the range of values ​​for the SSB index corresponding to the first TRP is 0 to 63. The range of values ​​for other SSB indices within the range of values ​​for the SSB index corresponding to the first TRP, excluding the index of the SSB actually sent by the first TRP, is 4 to 63. The range of values ​​for SSB indices outside the range of values ​​for the SSB index corresponding to the first TRP is greater than or equal to 64. In this case, the range of values ​​for the second SSB index can be 4 to 63, or greater than or equal to 64.

[0120] In one possible implementation, the second SSB index set may include at least one second SSB index. For example, in the previous example, the second SSB index set may include the index of at least one SSB from SSB#4 to SSB#63, or the second SSB index set may include at least one SSB index greater than or equal to 64.

[0121] Optionally, all SSB indices in the second SSB index set are indices other than those of the SSBs actually sent by the first TRP. Alternatively, some SSB indices in the second SSB index set are indices other than those of the SSBs actually sent by the first TRP, while another part of the SSB indices in the second SSB index set are indices of the SSBs actually sent by the first TRP.

[0122] In one possible implementation, the SSB indices in the second SSB index set correspond to the SSB indices in the first SSB index set. Taking a certain SSB index in the second SSB index set (hereinafter referred to as SSB index a) as an example, in the first SSB index set, the SSB index corresponding to SSB index a (hereinafter referred to as SSB index b) can be the index of the SSB actually occurring in the first TRP. The terminal device can determine the PL between the first TRP and the terminal device based on the SSB indicated by SSB index b, thereby determining the transmission power of the PRACH sent to the first TRP. Alternatively, after determining the PL between the first TRP and the terminal device based on the SSB indicated by SSB index b, the terminal device can also 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. Here, the SSB indicated by SSB index b can be understood as PL-RS, that is, the SSB indicated by SSB index b serves as a reference signal for determining the PL.

[0123] In one possible implementation, one or more SSB indices in the second SSB index set may correspond to an SSB index in the first SSB index set.

[0124] In one possible implementation, each SSB index in the second SSB index set has a corresponding SSB index in the first SSB index set. Alternatively, some SSB indexes in the second SSB index set have corresponding SSB indexes in the first SSB index set; however, other SSB indexes in the second SSB index set do not have corresponding SSB indexes in the first SSB index set.

[0125] For example, the SSB indices in the second SSB index set are 58–63, 64, and 65, while the SSB indices in the first SSB index set are 0–3. Specifically, SSB indices 58–63 in the second SSB index set have corresponding SSB indices in the first SSB index set, as shown in Table 1. SSB indices 64 and 65 in the second SSB index set do not have corresponding SSB indices in the first SSB index set.

[0126] Table 1 SSB Index Correspondence

[0127]

[0128] It should be noted that the SSB indices in the first SSB index set can be consecutive or non-consecutive. Similarly, the SSB indices in the second SSB index set can be consecutive or non-consecutive.

[0129] As can be seen, the content indicated by the indicator field corresponding to the SSB index in PDCCHorder can determine whether the target TRP is the first TRP or the second TRP, whether in the intra-cell UL multi-TRP scenario or the inter-cell UL multi-TRP scenario.

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

[0131] In one possible implementation, the target TRP is designated as the first TRP in response to the indicator field corresponding to the UL / SUL indicator taking a first value; and / or, the target TRP is designated as the second TRP in response to the indicator field corresponding to the UL / SUL indicator taking a second value. In this implementation, by determining whether the indicator field corresponding to the UL / SUL indicator takes a first or second value, the target TRP can be quickly determined to be either the first or the second TRP.

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

[0133] In one possible implementation, in response to the serving cell not having a SUL carrier configured, the first indication field is the indication field corresponding to the UL / SUL indicator; and / or, in response to the serving cell having a SUL carrier configured, the first indication field is the indication field corresponding to the cell identifier indicator or the indication field corresponding to the SSB index. In other words, by determining whether the serving cell has a SUL carrier configured, it is possible to quickly determine which indication field in the PDCCH order carries the first indication information, thereby facilitating the rapid determination of 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 indicator, 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, please refer to the relevant descriptions of carrying the first indication information through the indication field corresponding to the cell identifier indicator, the indication field corresponding to the SSB index, or the indication field corresponding to the UL / SUL indicator, which will not be repeated here.

[0135] As can be seen, the content indicated by the indication field corresponding to the UL / SUL indicator in PDCCHorder can determine whether the target TRP is the first TRP or the second TRP, whether in the intra-cell UL multi-TRP scenario or the inter-cell UL multi-TRP scenario.

[0136] The foregoing describes the method embodiments provided in this application. In order to facilitate better implementation of the above-described solutions of the embodiments of this application, the embodiments of this application also provide corresponding apparatus.

[0137] This application embodiment can divide the communication device into functional modules according to the above method example. For example, each function can be divided into its own functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0138] Please see Figure 5 , Figure 5 This is a schematic diagram of a communication device provided in an embodiment of this application. The communication device 50 can be a terminal device, or a device within a terminal device (e.g., a chip, a chip system, or a circuit). Alternatively, the communication device 50 can be a first TRP or a second TRP, or a device within the first TRP or the second TRP (e.g., a chip, a chip system, or a circuit). Figure 5 As shown, the communication device 50 includes at least a communication unit 501 and a processing unit 502.

[0139] For communication device 50 used to implement Figures 2-4 The functionality of the terminal device in the corresponding embodiment:

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

[0141] The processing unit 502 is also configured to, based on the first indication information, call the communication unit 501 to send a PRACH to the target TRP.

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

[0143] In one possible implementation, the first indication field is the indication field corresponding to the cell identifier indicator; in response to the indication field corresponding to the cell identifier indicator indicating the 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 the second cell identifier, the target TRP is the second TRP.

[0144] In one possible implementation, the first cell identifier is the physical cell identifier (PCI) of the cell corresponding to the first TRP, and the second cell identifier is the virtual cell identifier of the cell corresponding to the second TRP. The virtual cell identifier of the cell corresponding to the second TRP is different from both the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP. Alternatively, 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 is different from the PCI of the cell corresponding to the second TRP.

[0145] In one possible implementation, the first indicator field is the indicator field corresponding to the SSB index; the first TRP corresponds to the first SSB index set, and the second TRP corresponds to the second SSB index set; in response to the SSB index indicated by the indicator field 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 indicator field corresponding to the SSB index belonging to the second SSB index set, the target TRP is the second TRP.

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

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

[0148] In one possible implementation, the SSB indices in the second SSB index set correspond to the SSB indices in the first SSB index set.

[0149] In one possible implementation, the first indication field is the indication field corresponding to the 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 a 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 a second TRP.

[0150] In one 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 indicator or the indication field corresponding to the SSB index.

[0151] For a more detailed description of the communication unit 501 and the processing unit 502, please refer to the above. Figures 2-4 The relevant descriptions of the terminal devices in the corresponding embodiments will not be repeated here.

[0152] For communication device 50 used to implement Figures 2-4 The situation regarding the function of the first TRP in the corresponding embodiment:

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

[0154] The processing unit 502 is also configured to call the communication unit 501 to receive PRACH based on the first instruction information.

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

[0156] In one possible implementation, the first indication field is the indication field corresponding to the cell identifier indicator; in response to the indication field corresponding to the cell identifier indicator indicating the 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 the second cell identifier, the target TRP is the second TRP.

[0157] In one possible implementation, the first cell identifier is the physical cell identifier (PCI) of the cell corresponding to the first TRP, and the second cell identifier is the virtual cell identifier of the cell corresponding to the second TRP. The virtual cell identifier of the cell corresponding to the second TRP is different from both the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP. Alternatively, 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 is different from the PCI of the cell corresponding to the second TRP.

[0158] In one possible implementation, the first indicator field is the indicator field corresponding to the SSB index; the first TRP corresponds to the first SSB index set, and the second TRP corresponds to the second SSB index set; in response to the SSB index indicated by the indicator field 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 indicator field corresponding to the SSB index belonging to the second SSB index set, the target TRP is the second TRP.

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

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

[0161] In one possible implementation, the SSB indices in the second SSB index set correspond to the SSB indices in the first SSB index set.

[0162] In one possible implementation, the first indication field is the indication field corresponding to the 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 a 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 a second TRP.

[0163] In one 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 indicator or the indication field corresponding to the SSB index.

[0164] For a more detailed description of the communication unit 501 and the processing unit 502, please refer to the above. Figures 2-4The relevant description of the first TRP in the corresponding embodiment will not be repeated here.

[0165] For communication device 50 used to implement Figures 2-4 The situation regarding the function of the second TRP in the corresponding embodiment:

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

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

[0168] In one possible implementation, the first indication field is the indication field corresponding to the cell identifier indicator; in response to the indication field corresponding to the cell identifier indicator indicating the 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 the second cell identifier, the target TRP is the second TRP.

[0169] In one possible implementation, the first cell identifier is the physical cell identifier (PCI) of the cell corresponding to the first TRP, and the second cell identifier is the virtual cell identifier of the cell corresponding to the second TRP. The virtual cell identifier of the cell corresponding to the second TRP is different from both the PCI of the cell corresponding to the first TRP and the PCI of the cell corresponding to the second TRP. Alternatively, 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 is different from the PCI of the cell corresponding to the second TRP.

[0170] In one possible implementation, the first indicator field is the indicator field corresponding to the SSB index; the first TRP corresponds to the first SSB index set, and the second TRP corresponds to the second SSB index set; in response to the SSB index indicated by the indicator field 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 indicator field corresponding to the SSB index belonging to the second SSB index set, the target TRP is the second TRP.

[0171] In one 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 one possible implementation, the first SSB index set includes at least one first SSB index, which is the index of the SSB sent by the first TRP; the second SSB index set includes at least one second SSB index, which is an index other than the index of the SSB sent by the first TRP.

[0173] In one possible implementation, the SSB indices in the second SSB index set correspond to the SSB indices in the first SSB index set.

[0174] In one possible implementation, the first indication field is the indication field corresponding to the 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 a 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 a second TRP.

[0175] In one 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 indicator or the indication field corresponding to the SSB index.

[0176] For a more detailed description of the communication unit 501 and the processing unit 502, please refer to the above. Figures 2-4 The relevant description of the second TRP in the corresponding embodiment will not be repeated here.

[0177] Please see Figure 6 , Figure 6 This is a schematic diagram of another communication device provided in an embodiment of this application. For example... Figure 6 As shown, the communication device 60 may include one or more processors 601, which can also be called processing units, and can implement certain control functions. The processor 601 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device (e.g., base station, baseband chip, terminal, terminal chip, DU or CU, etc.), execute software programs, and process data from the software programs.

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

[0179] In another alternative design, the processor 601 may include a transceiver unit for implementing receiving and transmitting functions. For example, this transceiver unit may be a transceiver circuit, an interface, an interface circuit, or a communication interface. The transceiver circuit, interface, or interface circuit for implementing receiving and transmitting functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit can be used for reading and writing code / data, or it can be used for transmitting or relaying signals.

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

[0181] Optionally, the communication device 60 may include one or more memories 602, which may store instructions 604 and / or data. The instructions 604 and / or data can be executed on a processor, causing the communication device 60 to perform the methods described in the above method embodiments. Optionally, the memory may also store data. Optionally, the processor may also store instructions and / or data. The processor and memory may be configured separately or integrated together. For example, the correspondence described in the above method embodiments may be stored in memory or in the processor.

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

[0183] Optionally, the communication device 60 in this embodiment can be used to perform the functions described in this embodiment. Figures 2-4 The method described in the corresponding embodiment.

[0184] In one embodiment, the communication device 60 can be a terminal device or a device within the terminal device (e.g., a chip, a chip system, or a circuit). When the computer program instructions stored in the memory 602 are executed, the transceiver 605 is used to perform the operations performed by the communication unit 501 in the above embodiment. The transceiver 605 is also used to send information to other communication devices besides the communication device. The terminal device or the device within the terminal device can also be used to perform the above... Figures 2-4 The various methods executed by the terminal device in the corresponding embodiments will not be described in detail.

[0185] In one embodiment, the communication device 60 can be a first TRP or a second TRP, or a device within the first TRP or the second TRP (e.g., a chip, a chip system, or a circuit). When the computer program instructions stored in the memory 602 are executed, the transceiver 605 is used to perform the operations performed by the communication unit 501 in the above embodiment. The aforementioned first TRP or second TRP, or the device within the first TRP or the second TRP, can also be used to perform the above... Figures 2-4 The various methods executed by the first TRP or the second TRP in the corresponding embodiments will not be described in detail.

[0186] The processor and transceiver described in this application can be implemented on integrated circuits (ICs), analog ICs, radio frequency interface chips (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductors (CMOS), n-metal-oxide-semiconductor (NMOS), p-type metal oxide semiconductors (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0187] The structure of the device described in this application may be unaffected by [the following]. Figure 6 The device is subject to limitations. It can be a standalone device or part of a larger device. For example, the device could be:

[0188] (1) An independent integrated circuit IC, or chip, or chip system or subsystem;

[0189] (2) A collection of one or more ICs, optionally including a storage component for storing data and / or instructions;

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

[0191] (4) Modules that can be embedded in other devices;

[0192] (5) Receivers, terminals, smart terminals, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, machinery, home appliances, medical devices, industrial equipment, etc.

[0193] (6) Others, etc.

[0194] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. For ease of explanation, Figure 7 Only the main components of the terminal device are shown. For example... Figure 7 As shown, the terminal device 70 includes a processor, memory, control circuitry, antenna, and input / output devices. The processor is primarily used to process communication protocols and data, control the entire terminal device, execute software programs, and process the data from those programs. The memory is mainly used to store software programs and data. The radio frequency (RF) circuitry is primarily used for converting baseband signals to RF signals and processing RF signals. The antenna is primarily used for transmitting and receiving RF signals in the form of electromagnetic waves. Input / output devices, such as touchscreens, displays, and keyboards, are primarily used to receive user input data and output data to the user.

[0195] When the terminal device is powered on, the processor can read the software program from the storage unit, parse and execute the instructions of the software program, and process the data of the software program. 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 (RF) circuit. The RF circuit processes the baseband signal to obtain the RF signal and transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna. This RF signal is further converted into a baseband signal and output to the processor. The processor converts the baseband signal back into data and processes the data.

[0196] For ease of explanation, Figure 7 Only one memory and processor are shown. In actual terminal devices, multiple processors and memories may exist. Memory can also be called storage medium or storage device, etc., and this application embodiment does not limit this.

[0197] As an optional implementation, the processor may include a baseband processor and a central processing unit (CPU). The baseband processor is mainly used to process communication protocols and communication data, while the CPU is mainly used to control the entire terminal device, execute software programs, and process the data of the software programs. Figure 7The processor in the device integrates the functions of a baseband processor and a central processing unit (CPU). Those skilled in the art will understand that the baseband processor and CPU can also be independent processors interconnected via technologies such as buses. It will also be understood that a terminal device can include multiple baseband processors to adapt to different network standards, and multiple CPUs to enhance its processing capabilities. The various components of the terminal device can be connected via various buses. A baseband processor can also be described as a baseband processing circuit or a baseband processing chip. Similarly, a CPU can be described as a central processing circuit or a central processing chip. The functions for processing communication protocols and communication data can be built into the processor or stored as software programs in a storage unit, with the processor executing the software programs to implement the baseband processing functions.

[0198] In one example, the antenna and control circuit with transceiver functions can be considered as the transceiver unit 701 of the terminal device 70, and the processor with processing functions can be considered as the processing unit 702 of the terminal device 70. For example... Figure 7 As shown, the terminal device 70 includes a transceiver unit 701 and a processing unit 702. The transceiver unit can also be referred to as a transceiver, transceiver device, or transceiver apparatus. Optionally, the device in the transceiver unit 701 used for receiving functions can be considered a receiving unit, and the device in the transceiver unit 701 used for transmitting functions can be considered a transmitting unit; that is, the transceiver unit 701 includes both a receiving unit and a transmitting unit. For example, the receiving unit can also be referred to as a receiver, receiver circuit, or receiving device, and the transmitting unit can be referred to as a transmitter, transmitter, or transmitting circuit. Optionally, the receiving unit and the transmitting unit can be integrated into a single unit or can be multiple independent units. The receiving unit and the transmitting unit can be located in one geographical location or distributed across multiple geographical locations.

[0199] In one embodiment, the transceiver unit 701 is used to perform the operations performed by the communication unit 501 in the above embodiments. The terminal device 70 can also be used to perform the operations described above. Figures 2-4 The various methods executed by the terminal device in the corresponding embodiments will not be described in detail.

[0200] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, can implement the processes related to the terminal device in the methods provided in the above-described method embodiments.

[0201] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, can implement the processes related to the first TRP or the second TRP in the methods provided in the above method embodiments.

[0202] This application also provides a computer program product that, when run on a computer or processor, causes the computer or processor to perform one or more steps of any of the methods described above. If the constituent modules of the aforementioned devices are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.

[0203] This application also provides a chip system including at least one processor and an interface circuit. The interface circuit and the at least one processor are interconnected via a circuit. The at least one processor is used to execute computer programs or instructions to enable the above-mentioned... Figures 2-4 In any of the steps described in the corresponding embodiments, some or all of them are executed. In one possible implementation, the chip system may further include at least one memory, the interface circuit, the at least one memory, and the at least one processor interconnected via a line. The at least one memory stores instructions, which, when executed by the processor, [perform the aforementioned...]. Figures 2-4 Some or all of the steps described in the corresponding embodiments are performed. The chip system may be composed of chips or may include chips and other discrete devices.

[0204] This application also provides a communication system, which includes a terminal device, a first TRP, and a second TRP. For a detailed description, please refer to [reference needed]. Figures 2-4 The method is shown in the corresponding embodiment.

[0205] It should be understood that the memory mentioned in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Non-volatile memory can be a hard disk drive (HDD), a solid-state drive (SSD), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DRRAM). Memory is any other medium capable of carrying or storing desired program code having an instruction or data structure form and accessible by a computer, but is not limited thereto. The memory in the embodiments of this application may also be circuitry or any other means capable of implementing storage functions for storing program instructions and / or data.

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

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

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

[0209] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0210] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments provided herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented 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 this application.

[0211] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0212] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

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

[0214] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0215] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0216] The steps in the method of this application embodiment can be adjusted, combined, or deleted according to actual needs.

[0217] The modules / units in the device of this application embodiment can be merged, divided, and deleted according to actual needs.

[0218] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A communication method, characterized in that, The method includes: The system receives a first message and a first indication information. The first message is used to trigger a Physical Random Access Channel (PRACH), and the first indication information indicates that the PRACH is associated with a Target Transmitter / Receiver Point (TRP). The target TRP includes a first TRP or a second TRP. The first TRP supports receiving uplink signals from the terminal device and supports sending downlink signals to the terminal device, while the second TRP only supports receiving uplink signals from the terminal device. Based on the first indication information, the PRACH is sent to the target TRP.

2. The method according to claim 1, characterized in that, The first message is a Physical Downlink Control Channel (PDCCH) command, and the first indication information is carried through the first indication field in the PDCCH command.

3. The method according to claim 2, characterized in that, The first indication field is the indication field corresponding to the 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 according to claim 3, characterized in that, The first cell identifier is the physical cell identifier (PCI) of the cell corresponding to the first TRP, and the second cell identifier is the virtual cell identifier of the cell corresponding to the second TRP. The virtual cell identifier of the cell corresponding to the second TRP is different from both 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 is different from the PCI of the cell corresponding to the second TRP.

5. The method according to claim 2, characterized in that, The first indication field is the indication field corresponding to the SSB index of the synchronization signal block; the first TRP corresponds to the first SSB index set, and the second TRP corresponds to the second SSB index set; In response to the SSB index being an indication of the indication field 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 indicating that the SSB index belongs to the second SSB index set, the target TRP is the second TRP.

6. The method according to claim 5, characterized in that, 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 according to claim 5 or 6, characterized in that, The first SSB index set includes at least one first SSB index, which is the index of the SSB sent by the first TRP; The second SSB index set includes at least one second SSB index, which is an index other than the index of the SSB sent by the first TRP.

8. The method according to claim 7, characterized in that, The SSB indexes in the second SSB index set correspond to the SSB indexes in the first SSB index set.

9. The method according to claim 2, characterized in that, The first indication field is the indication field corresponding to the uplink / supplementary uplink 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.

10. The method according to claim 9, characterized in that, In response to the fact that the serving cell is not 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 fact that the serving cell has been configured with a SUL carrier, the first indication field is the indication field corresponding to the cell identifier indicator or the indication field corresponding to the SSB index.

11. A communication method, characterized in that, The method includes: Based on the first indication information, a Physical Random Access Channel (PRACH) is received; the first indication information indicates that the PRACH is associated with a Target Transmitter / Receiver Point (TRP), the PRACH is triggered by a first message, and the first message is sent by a first TRP; wherein, the target TRP includes the first TRP or a second TRP, the first TRP supports receiving uplink signals from the terminal device and supports sending downlink signals to the terminal device, and the second TRP only supports receiving uplink signals from the terminal device.

12. The method according to claim 11, characterized in that, The first message is a Physical Downlink Control Channel (PDCCH) command, and the first indication information is carried through the first indication field in the PDCCH command.

13. The method according to claim 12, characterized in that, The first indication field is the indication field corresponding to the 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.

14. The method according to claim 13, characterized in that, The first cell identifier is the physical cell identifier (PCI) of the cell corresponding to the first TRP, and the second cell identifier is the virtual cell identifier of the cell corresponding to the second TRP. The virtual cell identifier of the cell corresponding to the second TRP is different from both 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 is different from the PCI of the cell corresponding to the second TRP.

15. The method according to claim 12, characterized in that, The first indication field is the indication field corresponding to the SSB index of the synchronization signal block; the first TRP corresponds to the first SSB index set, and the second TRP corresponds to the second SSB index set; In response to the SSB index being an indication of the indication field 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 indicating that the SSB index belongs to the second SSB index set, the target TRP is the second TRP.

16. The method according to claim 15, characterized in that, 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 according to claim 15 or 16, characterized in that, The first SSB index set includes at least one first SSB index, which is the index of the SSB sent by the first TRP; The second SSB index set includes at least one second SSB index, which is an index other than the index of the SSB sent by the first TRP.

18. The method according to claim 17, characterized in that, The SSB indexes in the second SSB index set correspond to the SSB indexes in the first SSB index set.

19. The method according to claim 12, characterized in that, The first indication field is the indication field corresponding to the uplink / supplementary uplink 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.

20. The method according to claim 19, characterized in that, In response to the fact that the serving cell is not 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 fact that the serving cell has been configured with a SUL carrier, the first indication field is the indication field corresponding to the cell identifier indicator or the indication field corresponding to the SSB index.

21. A communication device, characterized in that, It includes a unit for performing the method as described in any one of claims 1-10; or, it includes a unit for performing the method as described in any one of claims 11-20.

22. A communication device, characterized in that, The device includes a processor for executing a computer program or instructions in memory, which, when executed by the processor, cause the device to perform the method as described in any one of claims 1-10, or to perform the method as described in any one 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 that, when executed by a processor, cause the terminal device to perform the method as described in any one of claims 1-10, or cause the first transmit / receive point (TRP) or the second TRP to perform the method as described in any one of claims 11-20; wherein the first TRP supports receiving uplink signals from the terminal device and supports sending downlink signals to the terminal device, and the second TRP only supports receiving uplink signals from the terminal device.

24. A chip system, characterized in that, The device includes at least one processor, at least one memory, and an interface circuit. The at least one memory, the interface circuit, and the at least one processor are interconnected via a line. The at least one memory stores instructions. When the instructions are executed by the processor, they cause the terminal device to perform the method described in any one of claims 1-10, or cause a first transmit / receive point (TRP) or a second TRP to perform the method described in any one of claims 11-20. The first TRP supports receiving uplink signals from the terminal device and supports sending downlink signals to the terminal device, while the second TRP only supports receiving uplink signals from the terminal device.

25. A communication system, characterized in that, The method includes a terminal device, a first transmit / receive point (TRP), and a second TRP. The terminal device is used to perform the method as described in any one of claims 1-10, and the first TRP or the second TRP is used to perform the method as described in any one of claims 11-20. The first TRP supports receiving uplink signals from the terminal device and supports sending downlink signals to the terminal device, while the second TRP only supports receiving uplink signals from the terminal device.

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