Communication method and device

Abstract

The embodiment of the invention discloses a communication method and device. The method comprises the steps that network equipment sends configuration information; correspondingly, the terminal equipment receives the configuration information. And the terminal equipment determines that there is a demand for uplink transmission with the first TRP based on the configuration information. Wherein the first TRP is a TRP which has an uplink receiving function and does not have a downlink sending function. Visibly, in the method, the terminal equipment can determine, based on the configuration information, that the TRP to which uplink transmission is carried out comprises the TRP which has an uplink receiving function and does not have a downlink sending function.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0002] There are various types of transmission and reception points (TRPs) in communication networks. For example, some TRPs have both downlink transmission and uplink reception capabilities, while others have only uplink reception capabilities but no downlink transmission. In future communication systems, downlink transmission may be performed by a single TRP. In this scenario, how terminal devices perform uplink transmission is a technical issue that this solution needs to address. Summary of the Invention

[0003] An embodiment of the present application provides a communication method and apparatus, in which a terminal device determines that there is a need for uplink transmission with a TRP that has an uplink receiving function but does not have a downlink sending function.

[0004] In a first aspect, an embodiment of the present application provides a communication method. The method includes: a terminal device receiving configuration information; based on the configuration information, the terminal device determining that there is a need for uplink transmission with a first TRP, where the first TRP is a TRP that has an uplink receiving function but does not have a downlink sending function.

[0005] It can be seen that in this method, the terminal device can determine based on the configuration information that the TRP for uplink transmission includes a TRP with an uplink (UL) receiving function but not a downlink (DL) sending function.

[0006] In an optional embodiment, the method further includes: the terminal device receiving a physical downlink control channel (PDCCH) command, the PDCCH command including first information, the first information being used to indicate that the non-contention random access triggered by the PDCCH command is a non-contention random access for a first TRP; and the terminal device determining, based on the first information, that the non-contention random access is a non-contention random access for the first TRP. The PDCCH command triggers transmission of a physical random access channel (PRACH).

[0007] In an optional embodiment, the method further includes: the terminal device receives second information, the second information is used to configure the first resource, and the first resource is a PRACH resource used to perform non-competitive random access for the first TRP.

[0008] In an optional embodiment, the method further includes: the terminal device receiving a PDCCH command, the PDCCH command including third information, the third information being used to indicate the second resource. If the second resource belongs to the first resource, the terminal device determines that the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP.

[0009] In an optional embodiment, the method also includes: the terminal device determines the path loss bias and / or path loss reference signal in the transmission configuration indicator (TCI) state associated with the PRACH, and the PRACH is a PRACH for the first TRP; the terminal device determines the path loss based on the path loss bias and / or path loss reference signal, and the path loss is used to determine the transmit power of the PRACH.

[0010] In an optional implementation manner, the TCI state associated with the PRACH is the TCI state of the PRACH-related resource application.

[0011] In an optional implementation manner, the PRACH related resources are PRACH resources and / or random access channel occasion (RO) resources and / or preamble resources.

[0012] In an optional embodiment, radio resource control (RRC) signaling is used to configure the first TCI state of PRACH-related resource applications; or, RRC signaling is used to configure the second TCI state of PRACH-related resource applications; or, RRC signaling is used to configure the first TCI state and the second TCI state of PRACH-related resource applications.

[0013] In an optional implementation, the TCI state associated with the PRACH is the TCI state associated with the PRACH when facing the first TRP.

[0014] In an optional embodiment, the TCI state associated with the PRACH is the active or indicated TCI state associated with the first TRP; or, the TCI state associated with the PRACH is a TCI state different from the active or indicated TCI state associated with the PDCCH command.

[0015] In an optional embodiment, the method also includes: the terminal device receives fourth information in the PDCCH command, and the fourth information is used to indicate the path loss bias; the terminal device determines the path loss based on the path loss bias, and the path loss is used to determine the transmission power of the PRACH, and the PRACH is the PRACH for the first TRP.

[0016] In an optional implementation manner, the fourth information is specifically used to indicate a path loss offset among multiple path loss offsets, and the multiple path loss offsets are configured by RRC signaling.

[0017] In an optional implementation manner, the fourth information is specifically used to indicate a value of the path loss offset.

[0018] In an optional embodiment, the method further includes: if the fourth information is used to indicate the first value, the terminal device determines the path loss based on the demodulation reference signal (DMRS) quasi-co-site downlink reference signal of the PDCCH command. If the fourth information is used to indicate a value other than the first value, the fourth information indicates the value of the path loss offset.

[0019] In an optional embodiment, the method further includes: the terminal device determining the spatial information based on a synchronous signal / PBCH block (SSB) associated with the PRACH when facing the first TRP; or the terminal device determining the spatial information based on a TCI state associated with the first TRP. The spatial information is used for uplink transmission with the first TRP.

[0020] In a second aspect, an embodiment of the present application provides a communication method, comprising: a network device sending configuration information, the configuration information being used to determine whether there is a need for uplink transmission with a first TRP, the first TRP being a TRP having an uplink receiving function but not a downlink sending function.

[0021] In an optional embodiment, the method further includes: the network device sends a PDCCH command, the PDCCH command includes first information, and the first information is used to indicate that the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP. The PDCCH command triggers the transmission of a PRACH.

[0022] In an optional embodiment, the method further includes: the network device sends second information, the second information is used to configure the first resource, and the first resource is a PRACH resource used to perform non-competitive random access for the first TRP.

[0023] In an optional embodiment, the method also includes: the network device sends a PDCCH command, the PDCCH command includes third information, and the third information is used to indicate the second resource; the second resource is used to determine that the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP when the second resource belongs to the first resource.

[0024] In an optional embodiment, the method also includes: the network device sends RRC signaling, the RRC signaling is used to configure the TCI state of the PRACH-related resource application; the path loss bias and / or path loss reference signal in the TCI state of the PRACH-related resource application is used to determine the path loss, and the path loss is used to determine the transmission power of the PRACH, and the PRACH is the PRACH for the first TRP.

[0025] In an optional implementation manner, the PRACH-related resources are PRACH resources and / or RO resources and / or preamble resources.

[0026] In an optional implementation, RRC signaling is used to configure the first TCI state for PRACH-related resources; or, RRC signaling is used to configure the second TCI state for PRACH-related resources; or, RRC signaling is used to configure the first TCI state and the second TCI state for PRACH-related resources.

[0027] In an optional embodiment, the method also includes: the network device sends fourth information in the PDCCH command, the fourth information is used to indicate the path loss bias; the path loss bias is used to determine the path loss, and the path loss is used to determine the transmission power of the PRACH, and the PRACH is the PRACH for the first TRP.

[0028] In an optional implementation manner, the fourth information is specifically used to indicate a path loss offset among multiple path loss offsets, and the multiple path loss offsets are configured by RRC signaling.

[0029] In an optional implementation manner, the fourth information is specifically used to indicate a value of the path loss offset.

[0030] In an optional implementation, if the fourth information is used to indicate the first value, the downlink reference signal of the DMRS quasi-co-site of the PDCCH command is used to determine the path loss. If the fourth information is used to indicate a value other than the first value, the fourth information indicates the value of the path loss offset.

[0031] In a third aspect, an embodiment of the present application provides a communication device, the communication device comprising:

[0032] The communication unit is configured to receive configuration information.

[0033] The processing unit is used to determine, based on the configuration information, whether there is a need for uplink transmission with the first TRP, where the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0034] In addition, in this aspect, other optional implementations of the communication device can refer to the relevant content of the first aspect mentioned above and will not be described in detail here.

[0035] In a fourth aspect, an embodiment of the present application provides a communication device, comprising:

[0036] A communication unit is used to send configuration information, where the configuration information is used to determine whether there is a need for uplink transmission with a first TRP, where the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0037] In addition, in this aspect, other optional implementations of the communication device can refer to the relevant content of the second aspect mentioned above and will not be described in detail here.

[0038] In a fifth aspect, an embodiment of the present application provides a communication device, which includes a memory and a processor; optionally, the communication device also includes a communication interface.

[0039] memory for storing computer programs;

[0040] Communication interface, used to receive or send data;

[0041] The processor is configured to call program instructions stored in the memory.

[0042] In an optional embodiment, the processor calls a computer program to perform the following operations:

[0043] Receive configuration information; based on the configuration information, determine that there is a need for uplink transmission with the first TRP, and the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0044] In addition, in this manner, other optional implementations of the communication device can refer to the relevant content of the first aspect above and will not be described in detail here.

[0045] In another optional embodiment, the processor calls a computer program to perform the following operations:

[0046] Send configuration information, where the configuration information is used to determine whether there is a need for uplink transmission with the first TRP, where the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0047] In addition, in this manner, other optional implementations of the communication device can refer to the relevant content of the second aspect above and will not be described in detail here.

[0048] In a sixth aspect, an embodiment of the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is used to receive or send data.

[0049] In an optional implementation, the processor is configured to cause the chip to execute:

[0050] Receive configuration information; based on the configuration information, determine that there is a need for uplink transmission with the first TRP, and the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0051] In addition, in this method, other optional implementation methods of the chip can refer to the relevant content of the first aspect above and will not be described in detail here.

[0052] In another optional implementation, the processor is configured to cause the chip to execute:

[0053] Send configuration information, where the configuration information is used to determine whether there is a need for uplink transmission with the first TRP, where the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0054] In addition, in this method, other optional implementation methods of the chip can refer to the relevant content of the second aspect above and will not be described in detail here.

[0055] In a seventh aspect, an embodiment of the present application provides a module device, comprising a communication module, a power module, a storage module, and a chip, wherein:

[0056] The power supply module is used to provide electrical energy to the module device;

[0057] The storage module is used to store data and instructions;

[0058] The communication module is used for internal communication within the module device, or for communication between the module device and an external device;

[0059] The chip is used to execute the method described in the first aspect or the second aspect.

[0060] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium for storing computer software instructions used by the above-mentioned terminal, which includes a program involved in executing the method described in the first aspect or the second aspect above.

[0061] In a ninth aspect, an embodiment of the present application further provides a computer program product, which, when executed on a processor, enables the method flow described in the first or second aspect above to be implemented.

[0062] In an embodiment of the present application, a network device sends configuration information to a terminal device; the terminal device determines, based on the configuration information, that there is a need for uplink transmission with a first TRP, and the first TRP is a TRP that has an uplink receiving function but does not have a downlink transmitting function. It can be seen that in this method, the terminal device can determine, based on the configuration information, that the TRP for uplink transmission includes a TRP that has an uplink receiving function but does not have a downlink transmitting function. Moreover, for the scenario in which the terminal device determines that there is a need for uplink transmission with the first TRP, an embodiment of the present application also provides some optional implementation methods, which can enable the terminal device to determine that the non-competitive random access triggered by the PDCCH command is directed to the first TRP, as well as determine the path loss between the terminal device and the first TRP, and determine the spatial domain information of the PRACH directed to the first TRP, which is beneficial for the terminal device to perform non-competitive random access with the first TRP, thereby facilitating uplink transmission between the terminal device and the first TRP. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 A schematic diagram of a communication system provided in an embodiment of the present application;

[0064] Figure 2 A schematic diagram of a scenario provided in an embodiment of the present application;

[0065] Figure 3 A flow chart of a communication method provided in an embodiment of the present application;

[0066] Figure 4 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0067] Figure 5 A schematic structural diagram of another communication device provided in an embodiment of the present application;

[0068] Figure 6 A schematic structural diagram of a module device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0069] The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0070] Among them, the terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. "First" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "multiple" means two or more.

[0071] Furthermore, the terms "include," "comprise," and "have," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0072] It should be understood that in this application, "multiple" refers to two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "When" and "if" both mean that corresponding processing will be carried out under certain objective circumstances. It does not limit the time, nor does it require a judgment action when it is implemented, nor does it mean that there are other limitations.

[0073] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0074] To better understand the embodiments of the present application, the system architecture involved in the embodiments of the present application is first introduced:

[0075] The present application can be applied to the fifth generation mobile communication (5G) system, the fourth generation mobile communication (4G) system, the third generation mobile communication (3G) system, and various new communication systems in the future, such as the sixth generation (6G) mobile communication, the seventh generation (7G) mobile communication, etc., and the embodiments of the present application are not limited to this.

[0076] Figure 1 is a schematic diagram of a communication system provided in an embodiment of the present application. The solution in the present application may be applicable to the communication system. The communication system may include but is not limited to a network device and a terminal device. Figure 1The number and form of the devices shown are for illustrative purposes only and do not constitute a limitation on the embodiments of the present application. In actual applications, more than one network device and more than one terminal device may be included. Figure 1 The communication system shown is illustrated by taking two network devices and one terminal device as an example. In the embodiment of the present application, the communication system may also include other devices that communicate with the network device or the terminal device, which is not limited in the embodiment of the present application.

[0077] In the embodiment of the present application, the network device can be used to communicate with the terminal device. In some possible implementations, the network device is a physical entity connected to the network, and the network device includes a base station and a base station controller of the access network.

[0078] The base station (BS) in the embodiments of the present application, which may also be referred to as a base station device, is a device deployed in a wireless access network (RAN) to provide wireless communication functions. For example, the device that provides base station functions in a second generation mobile communication (2G) network includes a base transceiver station (BTS). The device that provides base station functions in a 3G network includes a node B (NodeB). The device that provides base station functions in a 4G network includes an evolved node B (eNB). In wireless local area networks (WLAN), the device that provides base station functions is an access point (AP). The device that provides base station functions in 5G new radio (NR) is a gNB, and the further evolved node B (ng-eNB), wherein the gNB and the terminal device communicate using NR technology, and the ng-eNB and the terminal use evolved universal terrestrial radio access (E-UTRA) technology for communication, and both the gNB and the ng-eNB can be connected to the 5G core network. The base station in the embodiment of the present application also includes equipment that provides base station functions in future new communication systems, etc.

[0079] The base station controller in the embodiments of the present application, also referred to as a base station controller device, is a device that manages base stations. For example, it can be a base station controller (BSC) in a 2G network, a radio network controller (RNC) in a 3G network, or a device that controls and manages base stations in future communication systems.

[0080] In some possible implementations, the network device may be a transmission and reception point (TRP). The TRP may be characterized by a transmission configuration indicator (TCI) state, a sounding reference signal (SRS) resource set, an SRS resource, spatial information, or a core set pool index (core set Pool Index).

[0081] In some possible implementations, the network device may be any one of the multiple sites that perform coherent joint transmission (CJT) with the terminal device, or other sites outside the multiple sites, or other network devices that perform network communication with the terminal device, and there is no specific limitation on this. Among them, multi-site coherent joint transmission can be multiple sites coherent transmission, or different data belonging to the same physical downlink shared channel (PDSCH) are sent from different sites to the terminal device, or multiple sites are virtualized into one site for transmission. Names with the same meaning specified in other standards also apply to this application, that is, this application does not limit the names of these parameters. The sites in the multi-site coherent joint transmission can be remote radioheads (RRHs), TRPs, etc., and there is no specific limitation on this.

[0082] In some possible implementations, the network device may be any one of the multiple sites that perform incoherent joint transmission with the terminal device, or other sites outside the multiple sites, or other network devices that perform network communication with the terminal device, and there is no specific limitation on this. Among them, the multi-site incoherent joint transmission can be a multi-site joint incoherent transmission, or different data belonging to the same PDSCH is sent from different sites to the terminal device. The names with the same meaning specified in other standards are also applicable to this application, that is, this application does not limit the names of these parameters. The sites in the multi-site incoherent joint transmission can be RRH, TRP, etc., and there is no specific limitation on this. The transmission scheme of multiple TRPs may include a multi-TRP (single-downlink control information based multiple-TRP, S-DCI based M-TRP) transmission scheme based on a single downlink control information, and may also include a multi-TRP (M-DCI based M-TRP) transmission scheme based on multiple downlink control information.

[0083] Among them, M-DCI based M-TRP can be reflected as follows: the network will configure multiple coresetPoolIndex values, such as coresetPoolIndex = 0, coresetPoolIndex = 1. Of course, M-DCI based M-TRP may have other manifestations, and this application does not specifically limit this. Among them, coresetPoolIndex can be used to group downlink channels / downlink signals, and / or uplink channels / uplink signals, and different coresetPoolIndex values ​​can represent different TRPs.

[0084] Among them, S-DCI based M-TRP can be embodied as follows: one DCI can indicate multiple TCI states, or one DCI can include multiple sounding reference signal resource indicator (SRS resource indicator, SRI) fields. Of course, S-DCI based M-TRP may also be embodied in other ways, which are not specifically limited in this application.

[0085] It should be noted that the TRP of the present application is not limited to coherent joint transmission or incoherent joint transmission scenarios, but can also be applied to other scenarios without specific restrictions.

[0086] The terminal device in the embodiments of the present application may also be referred to as a terminal, and may refer to various forms of user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future-evolved public land mobile network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0087] In some possible implementations, for a serving cell, the terminal device may be a terminal device configured for M-DCI based M-TRP operation or S-DCI based M-TRP operation. Exemplarily, the terminal device is configured for M-DCIbased M-TRP operation, which may be manifested as: the terminal device is provided with two coresetPoolIndex values ​​for the first control resource set (CORESET) and the second CORESET (the two coresetPoolIndex values ​​are 0 and 1), or the terminal device is not provided with a coresetPoolIndex value for the first CORESET and is provided with a coresetPoolIndex value for the second CORESET (the coresetPoolIndex value is 1).

[0088] The terminal device is configured for S-DCI based M-TRP operation, which can be manifested as: in the medium access control control element (MAC CE) used to configure the TCI state of the data channel, at least one code point corresponding to the DCI field "Transmission Configuration Indication" corresponds to 2 TCI states.

[0089] It should be noted that the TRP in this application can be associated with spatial information or vacancy direction (e.g., one or a group of beams or TCI states), or the TRP can be characterized by spatial information or vacancy direction (e.g., one or a group of beams or TCI states). In addition, the TRP in this application can be a functional module (e.g., implemented by software functions) or implemented by hardware. This application does not limit the implementation method of the TRP.

[0090] It should be noted that the TRP of the present application can be represented by the transmission configuration indicator (TCI) state or the sounding reference signal (SRS) resource set (i.e., SRS resource set) or SRS resource (i.e., SRS resource) or spatial information or control resource set pool identifier (coresetPoolIndex), etc. The present application does not limit the representation method of TRP.

[0091] The present application can be applied to 5G communication systems, 4G communication systems, 3G communication systems, and various new communication systems in the future, such as the sixth generation (6G) mobile communication, the seventh generation (7G) mobile communication, etc., but the embodiments of the present application are not limited to this.

[0092] The following first describes the relevant concepts involved in the embodiments of the present application:

[0093] 1. Unified transmission configuration indicator state (Unified TCI state).

[0094] Understandably, the unified TCI state can be understood as configuring a unified TCI state type (UnifiedTCI-StateType). For UnifiedTCI-StateType, the unified transmission configuration indicates that the state type can be configured for the serving cell (For UnifiedTCI-StateType, indicates the unified TCIstate type the UE is configured for this serving cell.).

[0095] When the value of UnifiedTCI-StateType is "separate", it means that the serving cell is configured with dl-OrJointTCI-StateList for DL ​​TCI state and / or ul-TCI-ToAddModList for ULTCI state. (The value separate means this serving cell is configured with dl-OrJointTCI-StateList for DL ​​TCI state and / or ul-TCI-ToAddModList for ULTCI state.)

[0096] When the value of UnifiedTCI-StateType is "joint", this means that the serving cell is configured with dl-OrJointTCI-StateList for joint TCI state for UL and DL operation.

[0097] In some possible implementations, the unified TCI state function may include the following two mechanisms: a Joint mechanism and a Separate mechanism.

[0098] For example, the Joint mechanism can be understood as one TCI state being applicable to part or all, and / or part or, and / or part or all, of the aperiodic channel state information reference signal (AP CSI-RS) used for beam management (BM) and / or channel state information acquisition, and / or part or all of the physical uplink shared channel (PUSCH), and / or part or all of the physical uplink control channel (PUCCH), and / or part or all of the sounding reference signal (SRS).

[0099] If a serving cell is configured with the joint mechanism (which can be understood as unifiedTCI-StateType-r17 or unifiedTCI-StateType with the value of joint), it means that the serving cell is configured with dl-OrJointTCI-StateList for downlink and uplink operations.

[0100] For example, the Separate mechanism can be understood as two TCI states (or a pair of TCI states), one TCI state applicable to downlink channels / signals, and the other TCI state applicable to uplink channels / signals. The downlink channels / signals can be part or all of the PDSCH, and / or part or all of the PDCCH, and / or part or all of the AP CSI-RS used for BM and / or channel state information acquisition; the uplink channels / signals can be part or all of the PUSCH, and / or part or all of the PUCCH, and / or part or all of the SRS.

[0101] If a serving cell is configured with the separate mechanism (which can be understood as unifiedTCI-StateType-r17 or unifiedTCI-StateType with the value of separate), it means that the serving cell is configured with dl-OrJointTCI-StateList for the downlink TCI state and with ul-TCI-ToAddModList for the uplink TCI state.

[0102] See Figure 2 , the figure is a schematic diagram of a scenario. Figure 2 As shown, TRP1 has uplink receiving capability and downlink sending capability, while TRP2 and TRP3 have uplink receiving capability but not downlink sending capability. Figure 2 In the illustrated solution (case) 1, TRP1 performs uplink and downlink transmission with the terminal device, and TRP2 performs uplink transmission with the terminal device. Figure 2 In case 2 shown, TRP1 performs downlink transmission with the terminal device, and TRP2 and TRP3 perform uplink transmission with the terminal device. Figure 2 In case 3 shown, TRP1 performs uplink and downlink transmission with the terminal device. Figure 2 In case 4 shown, TRP1 performs downlink transmission with the terminal device, and TRP2 performs uplink transmission with the terminal device.

[0103] It can be seen that there are communication scenarios such as Figure 2In case 1 / case 2 / case 4, the uplink transmission is directed to a TRP with uplink reception capability but not downlink transmission capability, that is, there is uplink transmission directed to a UL-only TRP. However, since the UL-only TRP does not transmit a downlink signal, uplink transmissions directed to the UL-only TRP, such as PUSCH / PUCCH / sounding reference signal (SRS) transmissions, cannot directly obtain pathloss based on the downlink pathloss signal. Instead, they must use the downlink pathloss reference signal and / or pathloss offset from a TRP with uplink reception capability and downlink transmission capability (a TRP with both DL and UL) to calculate the pathloss. The pathloss offset is the difference between the pathloss between the terminal device and the TRP with both DL and UL, and the pathloss between the terminal device and the UL-only TRP. Therefore, in order to perform uplink communication with a TRP with uplink reception capability but not downlink transmission capability, the terminal device must obtain a pathloss offset.

[0104] It should be noted that the path loss offset can be understood as the value of the path loss offset / path loss difference, as an index used to indicate the value of the path loss offset / path loss difference, as a value used to indicate / represent / characterize the path loss offset / path loss difference, or as a value used to indicate / represent / characterize the path loss offset / path loss difference, and this embodiment of the present application does not limit this. In other words, the path loss offset can directly indicate the value of the path loss offset / path loss difference, or can indirectly indicate the value of the path loss offset / path loss difference.

[0105] It should be noted that the UL-only TRP in this application can be understood as there being no associated / corresponding / configured TCI state for downlink, or the associated / corresponding / configured TCI state for downlink is invalid. For example: if the unified TCI state type is "separate", there is no corresponding TCI state for downlink, or the corresponding TCI state for downlink is invalid; if the unified TCI state type is "joint", the associated / corresponding / configured TCI state may not be used for downlink. This application does not impose specific restrictions on how to characterize the UL-only TRP.

[0106] It should be noted that the TRP with downlink transmission capability and uplink reception capability in this application can be understood as having an associated / corresponding / configured TCI state for downlink. For example: if the unified TCI state type is "separate", there is a corresponding TCI state for downlink; if the unified TCI state type is "joint", the associated / corresponding / configured TCI state can be used for downlink. This application does not impose specific restrictions on how to characterize a TRP with downlink transmission capability and uplink reception capability.

[0107] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0108] See also Figure 3 , Figure 3 This is a flow chart of a communication method provided in an embodiment of the present application. This communication method uses a network device and a terminal device as examples to illustrate the corresponding method, but this application does not limit the method's execution entities. For example, the device in the method may also be a chip or software that supports the device in implementing the corresponding method. The communication method includes the following steps.

[0109] S101. A network device sends configuration information; correspondingly, a terminal device receives the configuration information.

[0110] The configuration information may be carried in, for example, high layer signaling, which may be, for example, RRC signaling and / or medium access control (MAC) signaling. The configuration information may also be carried in layer 1 signaling, such as downlink control information. The configuration information may also be carried in high layer signaling and layer 1 signaling. In addition, optionally, the network device may be a second TRP, which is a TRP having an uplink receiving function and a downlink transmitting function, and the second TRP may also be referred to as both UL and DL TRP, for example. Alternatively, the network device may be a TRP having a downlink transmitting function and not having an uplink receiving function.

[0111] It is understood that in the embodiments of the present application, the TRP having an uplink receiving function means that the TRP has the ability to receive signaling / signals / data from a terminal device. The TRP having a downlink sending function means that the TRP has the ability to send signaling / signals / data to a terminal device. In addition, the uplink receiving function can also be expressed as "uplink receiving capability"; the downlink sending function can also be expressed as "downlink sending capability."

[0112] S102: The terminal device determines, based on the configuration information, that there is a need for uplink transmission with a first TRP, wherein the first TRP is a TRP having an uplink receiving function but not a downlink transmitting function, and the first TRP may also be called a UL-only TRP, for example.

[0113] The terminal device determines that there is a need to perform uplink transmission with the first TRP, which can also be understood as: the terminal device determines that the TRP for uplink transmission includes the first TRP. For example, the terminal device determines to perform uplink transmission with the first TRP and to perform uplink transmission with the second TRP; or the terminal device determines to perform uplink transmission with the first TRP, but not with the second TRP.

[0114] For example, in a communication network, there is a scenario where the downlink transmission is a single TRP transmission. In this scenario, the terminal device may be performing uplink transmission with the first TRP, or may also be performing uplink transmission with the second TRP, or may also be performing uplink transmission with the first TRP and the second TRP. Among them, the first TRP is a TRP with an uplink receiving function but not a downlink sending function, and the second TRP is a TRP with an uplink receiving function and a downlink sending function. In an embodiment of the present application, the terminal device can determine the TRP for the uplink transmission based on the configuration information received from the network device. In step S102, the terminal device determines that there is a need to perform uplink transmission with the first TRP based on the configuration information.

[0115] For example, combined with Figure 2 , Figure 2 In the , an upward arrow indicates upward movement, and a downward arrow indicates downward movement. Figure 2 In the scenarios described above, in cases 1, 2, and 4, the terminal device performs uplink transmission with the first TRP; in case 3, the terminal device does not perform uplink transmission with the first TRP. Cases 1, 2, 3, and 4 may be switched dynamically. Therefore, the terminal device needs to perform uplink transmission with the first TRP.

[0116] In an optional embodiment, the method further includes: the network device sends a PDCCH order (PDCCH order) to the terminal device; the terminal device determines whether the non-competitive random access triggered by the PDCCH order is a non-competitive random access for the first TRP. Furthermore, if the non-competitive random access triggered by the PDCCH order is a non-competitive random access for the first TRP, the terminal device can perform non-competitive random access to the first TRP, thereby enabling the terminal device to perform uplink transmission with the first TRP after accessing the first TRP.

[0117] In addition, in the embodiment of the present application, the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP, which can also be understood as: the PRACH triggered by the PDCCH command is for the first TRP. The non-contention random access triggered by the PDCCH command is not a non-contention random access for the first TRP, which can also be understood as: the PRACH triggered by the PDCCH command is not for the first TRP.

[0118] The following describes an optional method for a terminal device to determine whether the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP, as described in the following optional implementation 1.1 and implementation 1.2.

[0119] Implementation method 1.1, the PDCCH command sent by the network device includes first information, and the first information is used to indicate whether the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP. In this way, the terminal device can determine whether the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP based on the first information. The PDCCH command triggers the transmission of a PRACH. It is understandable that a PRACH transmission from the terminal device is in response to the terminal device's detection of the PDCCH command that triggers the non-competitive random access process.

[0120] Optionally, the value of the first information can use "0" or "1" to indicate whether the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP. For example, when the value of the first information is "0", it indicates that the non-competitive random access triggered by the PDCCH command is not a non-competitive random access for the first TRP, and when the value of the first information is "1", it indicates that the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP. The value of the first information can also be expressed in other ways, which is not limited.

[0121] Optionally, the field in the PDCCH command used to carry the first information may be, for example, a PRACH association indication (i.e., PRACH association indicator) field, but the embodiments of the present application do not limit the field in the PDCCH command used to carry the first information and the naming of the field used to carry the first information. For example, taking the PRACH association indicator field as an example, if the value of the PRACH association indicator field is 0, it indicates that the path loss is determined based on the downlink reference signal of the DMRS quasi-co-site of the PDCCH command, and the path loss is used to calculate the transmit power of the PRACH, which means that the non-competitive random access triggered by the PDCCH command is not a non-competitive random access for the first TRP. If the value of the PRACH association indicator field is 1, it indicates that the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP. In addition, the value of the PRACH association indicator field can also be expressed in other ways, and there is no limitation on this.

[0122] In implementation 1.2, the network device sends second information to the terminal device, where the second information is used to configure the first resource, and the first resource is a PRACH resource for performing non-competitive random access for the first TRP. Accordingly, the terminal device receives the second information from the network device. In addition, the first resource is a PRACH resource for performing non-competitive random access for the first TRP, which can also be understood as: the first resource is a PRACH resource for the first TRP. Optionally, the second information may be the aforementioned configuration information. Alternatively, the second information may not be the aforementioned configuration information. In this case, the embodiment of the present application does not have a specific time sequence restriction on the reception / transmission of the configuration information and the second information.

[0123] Optionally, the PDCCH command sent by the network device includes third information, and the third information is used to indicate the second resource, and the second resource is a PRACH resource. If the second resource belongs to the first resource, the terminal device determines that the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP. The second resource belongs to the first resource, for example, it can be that the second resource is a resource in the first resource. Optionally, the third information and the first information mentioned above may be the same information. Alternatively, the third information may not be the first information. In this case, the embodiment of the present application has no specific time sequence restrictions on the reception / transmission of the third information and the first information.

[0124] It can be seen that the terminal device is configured with PRACH resources for the first TRP, and the terminal device can determine whether the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP based on the PRACH resources indicated in the PDCCH command. Exemplarily, if the PRACH resources indicated in the PDCCH command belong to the PRACH resources for the first TRP, the terminal device can determine that the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP. If the PRACH resources indicated in the PDCCH command do not belong to the PRACH resources for the first TRP, the terminal device can determine that the non-competitive random access triggered by the PDCCH command is not a non-competitive random access for the first TRP.

[0125] In an optional embodiment, the method further includes: the terminal device determining a path loss, which is used to calculate the transmit power of the PRACH. Specifically, for the PRACH for the first TRP, the terminal device determines the path loss between the terminal device and the first TRP, where the first TRP has an uplink receiving function but does not have a downlink transmitting function. For the PRACH for the first TRP, the terminal device determines the path loss between the terminal device and the second TRP, where the second TRP has both an uplink receiving function and a downlink transmitting function.

[0126] The following describes optional methods for the terminal device to determine the path loss, as described in the following optional implementation 2.1 and implementation 2.2.

[0127] Implementation method 2.1, the terminal device determines the path loss bias and / or path loss reference signal in the TCI state (TCI state) associated with the PRACH, and the PRACH is the PRACH for the first TRP; the terminal device determines the path loss based on the path loss bias and / or path loss reference signal.

[0128] The path loss offset is the path loss difference between the first path loss and the second path loss, or can also be the path loss difference between the second path loss and the first path loss. The first path loss is the path loss between the terminal device and the first TRP. The second path loss is the path loss between the terminal device and the second TRP.

[0129] In addition, in the case where the PRACH is oriented towards the second TRP (i.e., a TRP with uplink receiving function and downlink transmitting function), the path loss reference signal on which the path loss is based is the path loss reference signal sent by the second TRP. The path loss reference signal is a downlink reference signal (DL RS) of the DMRS quasi co-located associated with the PDCCH command. If the active TCI state of the PDCCH providing the PDCCH command includes two RSs, the RS expected by the terminal device is an RS with the configured quasi co-located type (qcl-Type) set to "type D", and the UE uses the RS when applying the value provided by the power offset parameter (powerControlOffsetSS). In addition, for the case where the PRACH is oriented towards the second TRP, in addition to the above-mentioned path loss reference signal, the path loss reference signal may also be a path loss reference signal associated with the TCI state.

[0130] Furthermore, if the path loss reference signal is an SSB, the transmit power of the path loss reference signal (referenceSignalPower) can be determined based on the SSB power (i.e., ss-PBCH-BlockPower). If the path loss reference signal is a channel state information reference signal (CSI-RS), the transmit power of the path loss reference signal (referenceSignalPower) can be determined based on ss-PBCH-BlockPower and powerControlOffsetSS. If powerControlOffsetSS is not configured for the terminal, the value of powerControlOffsetSS is assumed to be 0dB.

[0131] Optionally, the TCI state associated with the PRACH is the TCI state applied to the PRACH-related resources. The PRACH-related resources are, for example, PRACH resources and / or RO resources and / or preamble resources. Optionally, high-layer signaling configures whether the PRACH-related resources apply the TCI state, or configures the PRACH-related resources to apply the first TCI state (first TCI state), or configures the PRACH-related resources to apply the second TCI state (second TCI state), or configures the PRACH-related resources to apply the first TCI state and the second TCI state. The high-layer signaling is, for example, RRC signaling.

[0132] For example, taking RRC signaling as an example, if RRC signaling configures PRACH-related resources to apply a first TCI state, then the terminal device can determine the path loss based on the path loss bias and / or path loss reference signal in the first TCI state. For another example, if RRC signaling configures PRACH-related resources to apply a second TCI state, then the terminal device can determine the path loss based on the path loss bias and / or path loss reference signal in the second TCI state. For another example, if RRC signaling configures PRACH-related resources to apply a first TCI state and a second TCI state, the terminal device determines the path loss based on the path loss bias and / or path loss reference signal in the first TCI state and the second TCI state.

[0133] In addition, the specific content of the first TCI state and / or the second TCI state is indicated by other signaling other than RRC signaling. The signaling used to indicate the specific content of the first TCI state and / or the second TCI state is, for example, MAC signaling or downlink control information (DCI).

[0134] In addition, the first TCI state and / or the second TCI state is indicated by other signaling other than RRC signaling. The signaling used to indicate the first TCI state and / or the second TCI state is, for example, MAC signaling or downlink control information (DCI).

[0135] Optionally, the TCI state associated with the PRACH is the TCI state associated with the PRACH when it is oriented towards the first TRP. That is, if the PRACH is oriented towards the first TRP, the PRACH is associated with the TCI state.

[0136] Optionally, the TCI state associated with the PRACH is the active or indicated TCI state associated with the first TRP, or the active or indicated TCI state associated with the PDCCH command, or an active or indicated TCI state different from the active or indicated TCI state associated with the PDCCH command.

[0137] In embodiment 2.2, the PDCCH command sent by the network device includes fourth information, which is used to indicate a path loss offset. The terminal device determines the path loss based on the path loss offset indicated by the fourth information. Optionally, the fourth information and the aforementioned first information may be the same information. Alternatively, the fourth information may not be the first information. In this case, this embodiment of the application does not impose any specific time sequence restrictions on the reception / transmission of the fourth information and the first information.

[0138] In one optional embodiment, the fourth information is specifically used to indicate one of multiple path loss offsets, where the multiple path loss offsets are configured by higher-layer signaling, such as RRC signaling. For example, each of the multiple path loss offsets corresponds to an index, and the fourth information is the index corresponding to the indicated path loss offset. The terminal device can determine the path loss offset used for determining the path loss based on the index corresponding to the path loss offset indicated by the fourth information, thereby determining the path loss. This application does not limit the specific implementation manner in which the fourth information indicates one of the multiple path loss offsets.

[0139] In another optional manner, the fourth information is specifically used to indicate a value of the path loss offset. In this way, the terminal device can determine the value of the path loss offset based on the fourth information, and further determine the path loss.

[0140] In another optional manner, if the fourth information is used to indicate a first value, the terminal device determines the path loss based on the downlink reference signal of the DMRS quasi-co-site commanded by the PDCCH; if the fourth information is used to indicate a value other than the first value, the fourth information indicates a value of the path loss offset. The first value can be preset or configured without limitation.

[0141] It is understandable that if the fourth information is used to indicate the first value, the terminal device can determine that the non-competitive random access triggered by the PDCCH command is for the second TRP, and then determine the path loss between the terminal device and the second TRP based on the downlink reference signal of the DMRS quasi-co-site of the PDCCH command. The path loss is used to calculate the transmission power of the PRACH for the second TRP, wherein the second TRP is a TRP with uplink receiving function and downlink transmitting function.

[0142] If the fourth information is used to indicate a value other than the first value, and the fourth information indicates the value of the path loss bias, then the terminal device can determine the path loss between the terminal device and the first TRP based on the value of the path loss bias indicated by the fourth information, and the path loss is used to calculate the transmission power of the PRACH facing the first TRP, wherein the first TRP is a TRP with an uplink receiving function but not a downlink transmitting function.

[0143] In an optional embodiment, the method further includes: the terminal device determining the airspace information based on the SSB associated with the PRACH when facing the first TRP. Alternatively, the terminal device determines the airspace information based on the TCI state associated with the first TRP. It can be seen that through this embodiment, the terminal device can determine the airspace information of the PRACH facing the first TRP.

[0144] In an optional embodiment, the method further includes: the terminal device determining the airspace information based on the SSB associated with the PRACH when facing the second TRP. Alternatively, the terminal device determines the airspace information based on the TCI state associated with the second TRP. It can be seen that through this embodiment, the terminal device can determine the airspace information of the PRACH facing the second TRP.

[0145] In summary, in this communication method, the network device sends configuration information; correspondingly, the terminal device receives the configuration information. Based on the configuration information, the terminal device determines that there is a need for uplink transmission with the first TRP. The first TRP is a TRP with an uplink receiving function but not a downlink sending function. It can be seen that the terminal device can determine the scenario for uplink transmission based on the configuration information, and specifically determines that the TRP for uplink transmission includes a TRP with an uplink receiving function but not a downlink sending function.

[0146] See also Figure 4 , Figure 4 4 is a schematic structural diagram of a communication device provided in an embodiment of the present invention. The communication device 400 may be a terminal device or a component of a terminal device (e.g., an integrated circuit, a chip, etc.); alternatively, the communication device 400 may be a network device or a component of a network device (e.g., an integrated circuit, a chip, etc.). The communication device 400 may include a processing unit 401. Optionally, the communication device 400 may further include a communication unit 402. The processing unit 401 may be used to control the communication unit 402 to transmit and receive data / signaling. Optionally, the communication device 400 may further include a storage unit.

[0147] In one implementation, the communication device 400 is configured to perform the functions of the terminal device in the aforementioned method embodiment:

[0148] The communication unit 402 is configured to receive configuration information.

[0149] The processing unit 401 is used to determine, based on the configuration information, whether there is a need for uplink transmission with the first TRP, where the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0150] In an optional embodiment, the communication unit 402 is further configured to receive a PDCCH command, where the PDCCH command includes first information, where the first information is used to indicate that the non-contention random access triggered by the PDCCH command is a non-contention random access for a first TRP. The processing unit 401 is further configured to determine, based on the first information, that the non-contention random access is a non-contention random access for the first TRP. The PDCCH command triggers the transmission of a PRACH.

[0151] In an optional implementation, the communication unit 402 is further used to receive second information, where the second information is used to configure a first resource, and the first resource is a PRACH resource used to perform non-competitive random access for the first TRP.

[0152] In an optional embodiment, the communication unit 402 is further configured to receive a PDCCH command, where the PDCCH command includes third information, where the third information is used to indicate the second resource. The processing unit 401 is further configured to: if the second resource belongs to the first resource, determine that the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP.

[0153] In an optional embodiment, the processing unit 401 is further configured to determine a path loss offset and / or a path loss reference signal in a TCI state associated with a PRACH, where the PRACH is a PRACH for the first TRP. The processing unit 401 is further configured to determine the path loss based on the path loss offset and / or the path loss reference signal, where the path loss is used to determine the transmit power of the PRACH.

[0154] In an optional implementation manner, the TCI state associated with the PRACH is the TCI state of the PRACH-related resource application.

[0155] In an optional implementation manner, the PRACH-related resources are PRACH resources and / or RO resources and / or preamble resources.

[0156] In an optional implementation, RRC signaling is used to configure the first TCI state for PRACH-related resources; or, RRC signaling is used to configure the second TCI state for PRACH-related resources; or, RRC signaling is used to configure the first TCI state and the second TCI state for PRACH-related resources.

[0157] In an optional implementation, the TCI state associated with the PRACH is the TCI state associated with the PRACH when facing the first TRP.

[0158] In an optional embodiment, the TCI state associated with the PRACH is the active or indicated TCI state associated with the first TRP; or, the TCI state associated with the PRACH is a TCI state different from the active or indicated TCI state associated with the PDCCH command.

[0159] In an optional embodiment, the communication unit 402 is further configured to receive fourth information in the PDCCH command, where the fourth information is used to indicate a path loss bias. The processing unit 401 is further configured to determine a path loss based on the path loss bias, where the path loss is used to determine a transmit power of a PRACH, where the PRACH is a PRACH for the first TRP.

[0160] In an optional implementation manner, the fourth information is specifically used to indicate a path loss offset among multiple path loss offsets, and the multiple path loss offsets are configured by RRC signaling.

[0161] In an optional implementation manner, the fourth information is specifically used to indicate a value of the path loss offset.

[0162] In an optional embodiment, the processing unit 401 is further configured to determine the path loss based on the downlink reference signal of the DMRS quasi-co-site commanded by the PDCCH when the fourth information is used to indicate the first value. If the fourth information is used to indicate a value other than the first value, the fourth information indicates a value of the path loss offset.

[0163] In an optional embodiment, the processing unit 401 is further configured to determine the spatial information based on the SSB associated with the PRACH when facing the first TRP. Alternatively, the processing unit 401 is further configured to determine the spatial information based on the TCI state associated with the first TRP. The spatial information is used for uplink transmission with the first TRP.

[0164] In another implementation, the communication device 400 is used to perform the functions of the network device in the aforementioned method embodiment:

[0165] The communication unit 402 is used to send configuration information, where the configuration information is used to determine whether there is a need for uplink transmission with the first TRP, where the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0166] In an optional implementation, the communication unit 402 is further configured to send a PDCCH command, the PDCCH command including first information, the first information being configured to indicate that the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP, wherein the PDCCH command triggers the transmission of a PRACH.

[0167] In an optional implementation, the communication unit 402 is further used to send second information, where the second information is used to configure a first resource, and the first resource is a PRACH resource used to perform non-competitive random access for the first TRP.

[0168] In an optional embodiment, the communication unit 402 is also used to send a PDCCH command, the PDCCH command includes third information, and the third information is used to indicate the second resource; the second resource is used to determine that the non-competitive random access triggered by the PDCCH command is a non-competitive random access for the first TRP when the second resource belongs to the first resource.

[0169] In an optional embodiment, the communication unit 402 is also used to send RRC signaling, and the RRC signaling is used to configure the TCI state of the PRACH-related resource application; the path loss bias and / or path loss reference signal in the TCI state of the PRACH-related resource application is used to determine the path loss, and the path loss is used to determine the transmission power of the PRACH, and the PRACH is the PRACH for the first TRP.

[0170] In an optional implementation manner, the PRACH-related resources are PRACH resources and / or RO resources and / or preamble resources.

[0171] In an optional implementation, RRC signaling is used to configure the first TCI state for PRACH-related resources; or, RRC signaling is used to configure the second TCI state for PRACH-related resources; or, RRC signaling is used to configure the first TCI state and the second TCI state for PRACH-related resources.

[0172] In an optional implementation, the communication unit 402 is also used to send the fourth information in the PDCCH command, and the fourth information is used to indicate the path loss bias; the path loss bias is used to determine the path loss, and the path loss is used to determine the transmission power of the PRACH, and the PRACH is the PRACH for the first TRP.

[0173] In an optional implementation manner, the fourth information is specifically used to indicate a path loss offset among multiple path loss offsets, and the multiple path loss offsets are configured by RRC signaling.

[0174] In an optional implementation manner, the fourth information is specifically used to indicate a value of the path loss offset.

[0175] In an optional implementation, if the fourth information is used to indicate the first value, the downlink reference signal of the DMRS quasi-co-site of the PDCCH command is used to determine the path loss. If the fourth information is used to indicate a value other than the first value, the fourth information indicates the value of the path loss offset.

[0176] The embodiments of the present application and the above-mentioned method embodiments are based on the same concept, and the technical effects they bring are also the same. For the specific principles, please refer to the description of the above-mentioned method embodiments, which will not be repeated here.

[0177] See Figure 5 , Figure 5 This is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. The communication device 500 may include a memory 501 and a processor 502. Optionally, it also includes a communication interface 503. The memory 501, processor 502, and communication interface 503 are connected via one or more communication buses. The communication interface 503 is controlled by the processor 502 to send and receive information.

[0178] The memory 501 may include a read-only memory and a random access memory, and provides instructions and data to the processor 502. A portion of the memory 501 may also include a nonvolatile random access memory.

[0179] The communication interface 503 is used to receive or send data.

[0180] The processor 502 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor may be a microprocessor, or alternatively, the processor 502 may be any conventional processor. Specifically:

[0181] The memory 501 is used to store program instructions.

[0182] The processor 502 is configured to call the program instructions stored in the memory 501 .

[0183] In an optional implementation manner, the processor 502 is configured to execute the functions of the terminal device in the aforementioned method embodiment when calling the computer program:

[0184] The communication interface 503 is used to receive configuration information.

[0185] The processor 502 is used to determine, based on the configuration information, whether there is a need for uplink transmission with the first TRP, where the first TRP is a TRP that has an uplink receiving function but does not have a downlink sending function.

[0186] In another optional implementation, the processor 502 is configured to execute the function of the network device in the aforementioned method embodiment when calling the computer program:

[0187] The communication interface 503 is used to send configuration information, where the configuration information is used to determine whether there is a need for uplink transmission with the first TRP. The first TRP is a TRP that has an uplink receiving function but does not have a downlink sending function.

[0188] The embodiments of the present application and the above-mentioned method embodiments are based on the same concept, and the technical effects they bring are also the same. For the specific principles, please refer to the description of the above-mentioned method embodiments, which will not be repeated here.

[0189] The present application also provides a chip that can execute the steps of the terminal device or network device described in the aforementioned method embodiment. The chip includes a processor and a communication interface, wherein the communication interface is used to receive or send data;

[0190] In one embodiment, the chip executes the relevant steps of the terminal device in the aforementioned method embodiment:

[0191] The processor is configured to enable the chip to perform the following operations: receive configuration information; based on the configuration information, determine whether there is a need for uplink transmission with the first TRP, and the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0192] In another embodiment, the chip executes the relevant steps of the network device in the aforementioned method embodiment:

[0193] The processor is configured to enable the chip to perform the following operations: sending configuration information, the configuration information is used to determine whether there is a need for uplink transmission with the first TRP, and the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0194] The embodiments of the present application and the above-mentioned method embodiments are based on the same concept, and the technical effects they bring are also the same. For the specific principles, please refer to the description of the above-mentioned method embodiments, which will not be repeated here.

[0195] For each device or product applied to or integrated in the chip, each module contained therein can be implemented in the form of hardware such as circuits, or at least some of the modules can be implemented in the form of software programs, which run on the processor integrated inside the chip, and the remaining (if any) modules can be implemented in the form of hardware such as circuits.

[0196] like Figure 6 As shown, Figure 6 6 is a schematic diagram of a module device according to an embodiment of the present application. The module device 600 can execute the steps of the terminal device or network device in the aforementioned method embodiment. The module device 600 includes: a communication module 601, a power module 602, a storage module 603, and a chip 604.

[0197] Among them, the power module 602 is used to provide power to the module device; the storage module 603 is used to store data and instructions; and the communication module 601 is used for internal communication within the module device, or for the module device to communicate with external devices.

[0198] In one embodiment, chip 604 is used to execute the method executed by the terminal device in the above method embodiment: receiving configuration information; based on the configuration information, determining whether there is a need for uplink transmission with the first TRP, and the first TRP is a TRP with uplink receiving function but not downlink sending function.

[0199] In another embodiment, chip 604 is used to execute the method executed by the network device in the above method embodiment: sending configuration information, the configuration information is used to determine whether there is a need for uplink transmission with the first TRP, and the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

[0200] The implementation of the module device can refer to the relevant content of the above method embodiment, which will not be described in detail here.

[0201] The embodiments of the present application and the above-mentioned method embodiments are based on the same concept, and the technical effects they bring are also the same. For the specific principles, please refer to the description of the above-mentioned method embodiments, which will not be repeated here.

[0202] An embodiment of the present application also provides a computer-readable storage medium, which stores instructions. When the computer-readable storage medium is executed on a processor, the method flow of the above method embodiment is implemented.

[0203] An embodiment of the present application further provides a computer program product. When the computer program product is run on a processor, the method flow of the above method embodiment is implemented.

[0204] Regarding the various modules / units contained in the various devices and products described in the above embodiments, they can be software modules / units, hardware modules / units, or partly software modules / units and partly hardware modules / units. For example, for various devices and products applied to or integrated into a chip, the various modules / units contained therein can all be implemented in the form of hardware such as circuits, or at least some of the modules / units can be implemented in the form of software programs, which run on the integrated processor inside the chip, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits; for various devices and products applied to or integrated into a chip module, the various modules / units contained therein can all be implemented in the form of hardware such as circuits, and different modules / units can be located in the same part of the chip module (such as a chip, circuit module, etc.) or in different components, or at least some of the modules / units can be implemented in the form of software programs. It can be implemented in the form of a software program, which runs on the processor integrated inside the chip module, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits; for various devices and products applied to or integrated in the terminal, the modules / units contained therein can all be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component (for example, chip, circuit module, etc.) or different components in the terminal, or at least some modules / units can be implemented in the form of a software program, which runs on the processor integrated inside the terminal, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuits.

[0205] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain operations can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0206] The descriptions of the various embodiments provided in this application can refer to each other. The descriptions of each embodiment have their own focus. For parts not described in detail in a particular embodiment, please refer to the relevant descriptions of other embodiments. For the convenience and brevity of description, for example, the functions and operations performed by the various devices and equipment provided in the embodiments of this application can refer to the relevant descriptions of the method embodiments of this application. The various method embodiments and the various device embodiments can also refer to, be combined with, or quote each other.

[0207] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A communication method, characterized in that: The method comprises: Receive configuration information; Based on the configuration information, it is determined that there is a need for uplink transmission with a first transmission receiving point TRP, where the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

2. The method according to claim 1, characterized in that The method further comprises: receiving a physical downlink control channel (PDCCH) command, where the PDCCH command includes first information, where the first information is used to indicate that the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP; Determining, based on the first information, that the non-contention random access is a non-contention random access for the first TRP; The PDCCH command triggers the transmission of a physical random access channel PRACH.

3. The method according to claim 1, characterized in that The method further comprises: Receive second information, where the second information is used to configure a first resource, where the first resource is a physical random access channel PRACH resource used to perform non-competitive random access for the first TRP.

4. The method according to claim 3, characterized in that The method further comprises: receiving a PDCCH command, where the PDCCH command includes third information, where the third information is used to indicate a second resource; If the second resource belongs to the first resource, it is determined that the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP.

5. The method according to any one of claims 1 to 4, characterized in that The method further comprises: Determine a path loss offset and / or a path loss reference signal in a transmission configuration indication TCI state associated with a PRACH, where the PRACH is a PRACH for the first TRP; A path loss is determined based on the path loss offset and / or a path loss reference signal, where the path loss is used to determine the transmit power of the PRACH.

6. The method according to claim 5, characterized in that The PRACH-associated TCI state is the TCI state of the PRACH-related resource application; The PRACH related resources are PRACH resources and / or random access channel opportunity RO resources and / or preamble resources.

7. The method according to claim 6, characterized in that Radio Resource Control (RRC) signaling is used to configure the PRACH-related resources to apply the first TCI state; or, RRC signaling is used to configure the PRACH-related resources to apply the second TCI state; or, RRC signaling is used to configure the PRACH-related resources to apply the first TCI state and the second TCI state.

8. The method according to claim 5, characterized in that The TCI state associated with the PRACH is the TCI state associated with the PRACH when facing the first TRP.

9. The method according to claim 5 or 8, characterized in that The TCI state associated with the PRACH is the active or indicated TCI state associated with the first TRP; or The PRACH-associated TCI state is a TCI state different from the active or indicated TCI state associated with the PDCCH command.

10. The method according to any one of claims 1 to 4, characterized in that The method further comprises: receiving fourth information in a PDCCH command, where the fourth information is used to indicate a path loss offset; Based on the path loss bias, the path loss is determined, and the path loss is used to determine the transmission power of PRACH, and the PRACH is the PRACH for the first TRP.

11. The method according to claim 10, characterized in that The fourth information is specifically used to indicate a path loss offset among multiple path loss offsets, where the multiple path loss offsets are configured by RRC signaling.

12. The method according to claim 10, characterized in that The fourth information is specifically used to indicate a value of the path loss offset.

13. The method according to claim 10, characterized in that The method further comprises: If the fourth information is used to indicate the first value, determining the path loss based on the demodulation reference signal DMRS quasi-co-site downlink reference signal commanded by the PDCCH; If the fourth information is used to indicate a value other than the first value, the fourth information indicates the value of the path loss offset.

14. The method according to any one of claims 1 to 13, further comprising: Determining spatial information based on a synchronized broadcast signal block (SSB) associated with the PRACH when oriented toward the first TRP; or, Determining airspace information based on the TCI status associated with the first TRP; The spatial domain information is used for uplink transmission with the first TRP.

15. A communication method, characterized in that: The method comprises: Send configuration information, where the configuration information is used to determine whether there is a need for uplink transmission with a first transmission receiving point TRP, where the first TRP is a TRP with an uplink receiving function but not a downlink sending function.

16. The method according to claim 15, characterized in that The method further comprises: Sending a physical downlink control channel PDCCH command, where the PDCCH command includes first information, where the first information is used to indicate that the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP; The PDCCH command triggers the transmission of a physical random access channel PRACH.

17. The method according to claim 15, characterized in that The method further comprises: Send second information, where the second information is used to configure a first resource, where the first resource is a physical random access channel PRACH resource used to perform non-competitive random access for the first TRP.

18. The method according to claim 17, characterized in that The method further comprises: Sending a PDCCH command, where the PDCCH command includes third information, where the third information is used to indicate the second resource; The second resource is used to determine that the non-contention random access triggered by the PDCCH command is a non-contention random access for the first TRP when the second resource belongs to the first resource.

19. The method according to any one of claims 15 to 18, characterized in that The method further includes: sending radio resource control RRC signaling, where the RRC signaling is used to configure a TCI state for a PRACH-related resource application; The path loss offset and / or path loss reference signal in the TCI state applied to the PRACH-related resources is used to determine the path loss, and the path loss is used to determine the transmit power of the PRACH, and the PRACH is the PRACH for the first TRP; The PRACH related resources are PRACH resources and / or random access channel opportunity RO resources and / or preamble resources.

20. The method according to claim 19, wherein The RRC signaling is used to configure the PRACH-related resources to apply the first TCI state; or, The RRC signaling is used to configure the PRACH-related resources to apply the second TCI state; or, The RRC signaling is used to configure the PRACH-related resources to apply the first TCI state and the second TCI state.

21. The method according to any one of claims 15 to 18, characterized in that The method further comprises: Sending fourth information in the PDCCH command, where the fourth information is used to indicate a path loss offset; The path loss offset is used to determine the path loss, and the path loss is used to determine the transmission power of PRACH, and the PRACH is the PRACH for the first TRP.

22. The method according to claim 21, characterized in that The fourth information is specifically used to indicate a path loss offset among multiple path loss offsets, where the multiple path loss offsets are configured by RRC signaling.

23. The method according to claim 21, characterized in that The fourth information is specifically used to indicate a value of the path loss offset.

24. The method according to claim 21, characterized in that If the fourth information is used to indicate the first value, the demodulation reference signal DMRS quasi-co-site downlink reference signal of the PDCCH command is used to determine the path loss; If the fourth information is used to indicate a value other than the first value, the fourth information indicates the value of the path loss offset.

25. A communication device, characterized in that: The apparatus includes a module or unit for implementing the method according to any one of claims 1 to 14, or includes a module or unit for implementing the method according to any one of claims 15 to 24.

26. A communication device, characterized in that: The communication device includes a processor and a memory, which are connected to each other, wherein the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to execute the method according to any one of claims 1 to 14, or to execute the method according to any one of claims 15 to 24.

27. A chip, characterized in that: The method comprises a processor and a communication interface, wherein the processor is configured to cause the chip to execute the method according to any one of claims 1 to 14, or execute the method according to any one of claims 15 to 24.

28. A module device, characterized in that: The module device includes a communication module, a power module, a storage module and a chip, wherein: The power supply module is used to provide electrical energy to the module device; The storage module is used to store data and instructions; The communication module is used for internal communication of the module device, or for communication between the module device and an external device; The chip is used to execute the method according to any one of claims 1 to 14, or to execute the method according to any one of claims 15 to 24.

29. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-readable instructions. When the computer-readable instructions are executed on the communication device, the communication device executes the method according to any one of claims 1 to 14, or executes the method according to any one of claims 15 to 24.

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