Path loss determination method and communication apparatus

Abstract

The present application provides a path loss determination method and a communication apparatus. A terminal device can receive first downlink control information from a network device, and since the first downlink control information is used for indicating one path loss among at least two path losses that are determined on the basis of a first path loss reference signal, the terminal device can determine one path loss among the at least two path losses on the basis of the received first downlink control information and the first path loss reference signal, wherein the path loss can be used for uplink transmission. On the basis of the method, the terminal device can determine the path loss used for this instance of uplink transmission from among the at least two path losses, thereby ensuring the uplink transmission performance.

Description

Method for determining path loss and communication device

[0001] This application claims priority to a Chinese patent application filed with the State Intellectual Property Office of China on February 7, 2024, with application number 202410176393.5, and priority to a Chinese patent application entitled “A method and communication device for determining path loss,” all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and more particularly, to a method for determining path loss and a communication device. Background Art

[0003] In a mobile communication system, since the transmission power of a terminal device is generally lower than that of a network device, the signal strength of an uplink transmission is generally lower than that of a downlink transmission, resulting in better downlink transmission performance of the terminal device but poor uplink transmission performance.

[0004] To address this issue, one solution is to deploy low-cost network devices with only uplink transmission capabilities. If such network devices are nearby, terminal devices can use them for uplink transmission, thereby improving uplink performance. However, because these network devices are only capable of uplink transmission and not downlink transmission, i.e., they do not send downlink reference signals, existing solutions make it impossible for terminal devices to estimate the path loss (or simply, path loss) for uplink transmission with these network devices. Consequently, terminal devices are unable to determine the uplink transmission power to these network devices, which impacts uplink performance.

[0005] Therefore, in this scenario, a method for determining path loss is needed so that the terminal device can determine the path loss of uplink transmission and ensure the performance of uplink transmission. Summary of the Invention

[0006] The method for determining path loss provided in the present application can determine the path loss of uplink transmission and ensure the performance of uplink transmission.

[0007] The present application provides a method for determining path loss, which can be performed by a terminal device (eg, user equipment), or can also be performed by a component of the terminal device (eg, a chip or circuit), without limitation.

[0008] This method can be applied to the terminal side, such as the terminal or a communication module in the terminal, or a circuit or chip responsible for communication functions in the terminal (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core). The following describes this method using the application of the terminal device as an example.

[0009] The method includes: receiving first information, the first information being used to indicate that a first path loss reference signal is used to determine a first path loss among at least two path losses; receiving the first path loss reference signal; and determining the first path loss based on the first information and the first path loss reference signal, wherein the first path loss is used for uplink transmission.

[0010] In the present application, the network device may send a downlink reference signal to the terminal device. The downlink reference signal may be an SSB or a CSI-RS. In this case, the downlink reference signal may be a first path loss reference signal, which is used for uplink transmission of the terminal device.

[0011] In one possible scenario, the first path loss in this application is the path loss to which a path loss adjustment amount is added to the path loss determined based on the first path loss reference signal, where the path loss adjustment amount is the difference between the first path loss and the second path loss. In another possible scenario, the second path loss in this application is the path loss determined directly based on the first path loss reference signal. For example, as shown in Figure 5, the first path loss is the path loss between the terminal device and network device #1, and the second path loss is the path loss between the terminal device and network device #2. The terminal device and network device #1 can only perform uplink transmission, while the terminal device and network device #2 can perform both uplink and downlink transmission.

[0012] Based on the above technical solution, in this application, a terminal device can receive first information from a network device. Because the first information indicates a first path loss among at least two path losses, and the at least two path losses are determined based on a first path loss reference signal, the terminal device can determine the first path loss based on the received first information and the first path loss reference signal. This first path loss can be used for uplink transmission. Based on this method, the terminal device can determine the path loss used for the current uplink transmission among the at least two path losses, thereby ensuring uplink transmission performance.

[0013] In combination with the first aspect, in one possible implementation, the first information includes an association between a transmission configuration indication state TCI state corresponding to the uplink transmission and a first path loss correction factor among at least two path loss correction factors, wherein the TCI state corresponds to a first path loss reference signal, the at least two path loss correction factors correspond one-to-one to at least two path losses, and the first path loss correction factor corresponds to the first path loss.

[0014] In the above implementation, the network device may configure two path loss correction factors alpha for the terminal device, configure an association between the TCI state and one of the at least two alphas, and send the association to the terminal device.

[0015] In combination with the first aspect, in one possible implementation, the first information is at least one of the following: configuration information of the transmission configuration indication state TCI state for uplink transmission, configuration information of the path loss reference signal, configuration information of the path loss correction factor for uplink transmission, and configuration information of the uplink power control parameter for uplink transmission.

[0016] This implementation can also be understood as follows: the TCI state configuration information for uplink transmission, the path loss reference signal configuration information, the path loss correction factor configuration information for uplink transmission, or the uplink power control parameter configuration information for uplink transmission can be used to indicate that the first path loss reference signal is used to determine the first path loss of at least two path losses. For example, the network device can include a field (e.g., field #1) in the TCI state configuration information, the path loss reference signal configuration information, the path loss correction factor configuration information, or the Uplink-powerControl configuration information. This field is used to indicate that the first path loss reference signal is used to determine the first path loss of at least two path losses, or the field is used to indicate whether to superimpose a path loss adjustment value on the second path loss.

[0017] In combination with the first aspect, in one possible implementation, the first information includes first downlink control information, the first downlink control information includes a first field, the value of the first field is used to indicate that a first path loss reference signal is used to determine a first path loss among at least two path losses, wherein the first downlink control information is used to schedule uplink transmission.

[0018] Exemplarily, the first field may be a sounding reference signal resource set indication SRS resource set indicator field in the first downlink control information.

[0019] In combination with the first aspect, in one possible implementation, the first information includes an association relationship between the second downlink control information and the first control resource pool index, wherein the first control resource pool index is used to determine the first path loss among at least two path losses, and the first downlink control information is used to schedule uplink transmission.

[0020] For example, the network device can configure the association relationship, and the protocol can preset some default rules. For example, the rule can be that when the value of the coresetpoolindex corresponding to the DCI (an example of the second downlink control information) is 1, it indicates that the first path loss reference signal corresponding to the current uplink transmission is used to determine the first path loss of at least two path losses, or that a path loss adjustment amount needs to be superimposed on the second path loss estimated by the first path loss reference signal corresponding to the TCI state.

[0021] In combination with the first aspect, in a possible implementation, the method also includes: receiving first indication information, the first indication information is used to indicate at least two transmission configuration indication states TCI states; the first information includes second indication information, the second indication information is used to indicate one TCI state or two TCI states of uplink transmission in the at least two TCI states, and the one TCI state or two TCI states of the uplink transmission are used to indicate that a first path loss reference signal is used to determine the first path loss among the at least two path losses.

[0022] In combination with the first aspect, in one possible implementation, the second indication information is used to indicate that the TCI state of the uplink transmission is a first TCI state in at least two TCI states, and the first TCI state corresponds to the first path loss, or; the second indication information is used to indicate that the TCI state of the uplink transmission is a second TCI state in at least two TCI states, and the second TCI state corresponds to the first path loss.

[0023] In combination with the first aspect, in a possible implementation, the method further includes: receiving a first medium access control element MAC CE signaling, where the first MAC CE is used to activate at least one TCI state, wherein the at least one activated TCI state includes the TCI state of the uplink transmission of the terminal device.

[0024] In combination with the first aspect, in a possible implementation, the second indication information is used to indicate that the TCI state of the uplink transmission is F in the first MAC CE signaling in at least two TCI states. i,2 Corresponding TCI state, F in the first MAC CE signaling i,2The corresponding TCI state corresponds to the first path loss, or the second indication information is used to indicate that the TCI state of the uplink transmission in at least two TCI states is F in the first MAC CE signaling i,1 Corresponding TCI state, F in the first MAC CE signaling i,1 The corresponding TCI state corresponds to the first path loss.

[0025] When the network device configures the terminal device to work in joint TCI mode, F i,1 , F i,2 It can be used to indicate whether the first and second joint TCI states corresponding to the i-th code point in the first MAC CE signaling exist.

[0026] In combination with the first aspect, in a possible implementation, the second indication information is used to indicate that the TCI state of the uplink transmission is S in the first MAC CE signaling in at least two TCI states. i,2 Corresponding TCI state, S in the first MAC CE signaling i,2 The corresponding TCI state corresponds to the first path loss, or the second indication information is used to indicate that the TCI state of the uplink transmission is S in the first MAC CE signaling in at least two TCI states. i,1 Corresponding TCI state, S in the first MAC CE signaling i,1 The corresponding TCI state corresponds to the first path loss.

[0027] The network equipment configuration terminal equipment works in separate TCI mode, S i,1 , S i,2 It can be used to indicate whether the first and second UL TCI states corresponding to the i-th code point in the first MAC CE signaling exist.

[0028] In combination with the first aspect, in one possible implementation, the method further includes: obtaining path loss information corresponding to a first path loss reference signal, where the path loss information is used to determine the first path loss; and determining the first path loss based on the first information and the first path loss reference signal, including: determining the first path loss based on the first information, the first path loss reference signal, and the path loss information.

[0029] Exemplarily, the network device may send an association between a first path loss reference signal and path loss information, and the association may be configured through RRC signaling, or may be sent through MAC CE signaling or DCI signaling. The signaling may be carried on PDSCH or PDCCH. The signaling may carry one or more first downlink reference signal indexes (e.g., SSB index, CSI-RS index), and one or more first path loss information, wherein the first downlink reference signal index corresponds one-to-one to the first path loss information. In this application, the first downlink reference signal may be understood as a first path loss reference signal.

[0030] Exemplarily, the terminal device may determine the path loss information corresponding to the first path loss reference signal by itself. It may also be understood that the path loss information is determined by the terminal device itself and does not need to be sent by the network device.

[0031] In combination with the first aspect, in a possible implementation, the at least two path losses also include a second path loss, and the second path loss is determined by the terminal device based on the transmit power and receive power of the first path loss reference signal, wherein the transmit power is the power configured by the network device to send the first path loss reference signal, and the receive power is the receive power of the terminal device to receive the first path loss reference signal.

[0032] In conjunction with the first aspect, in one possible implementation, the path loss information includes a path loss adjustment amount, where the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss. Determining the first path loss based on the first information, the first path loss reference signal, and the path loss information includes: determining the second path loss based on the first path loss reference signal; and determining the first path loss based on the first information, the second path loss, and the path loss adjustment amount.

[0033] In conjunction with the first aspect, in a possible implementation, the path loss information includes a first path loss. In this implementation, the "first path loss" can be understood as "a value corresponding to the first path loss."

[0034] In combination with the first aspect, in one possible implementation, the path loss information includes a power difference, where the power difference is used to indicate the difference between the power of the first uplink reference signal received by the network device and the power of the second uplink reference signal received. Determining the first path loss based on the first information, the first path loss reference signal, and the path loss information includes: determining the second path loss based on the first path loss reference signal; and determining the first path loss based on the first information, the second path loss, the power difference, the power of sending the first uplink reference signal, and the power of sending the second reference signal.

[0035] In combination with the first aspect, in one possible implementation, the path loss information includes the power of the third uplink reference signal received by the network device, and determining the first path loss based on the first information, the first path loss reference signal and the path loss information includes: determining the first path loss based on the first information, the power of the third uplink reference signal sent by the terminal device and the power of the third uplink reference signal received by the network device.

[0036] In a second aspect, a method for determining path loss is provided. The method can be performed by a network device (e.g., a base station), or can be performed by a component of the network device (e.g., a chip, a chip system, or a circuit), without limitation.

[0037] In a possible implementation, if in an open RAN architecture, the method can be performed by a CU (CU-CP or CU-UP), a DU, or a RU.

[0038] Among them, the beneficial effects corresponding to the technical solution on the network side and the beneficial effects corresponding to the device can refer to the description of the beneficial effects on the terminal side, and will not be repeated here.

[0039] The method includes: sending first information, the first information is used to indicate that a first path loss reference signal is used to determine a first path loss among at least two path losses, wherein the first path loss is used for uplink transmission; and sending the first path loss reference signal.

[0040] Specifically, the various implementation methods of the "first information" on the network side can refer to the various implementation methods of the first aspect mentioned above and will not be repeated here.

[0041] In combination with the second aspect, in a possible implementation manner, the method further includes: sending first indication information, where the first indication information is used to indicate at least two transmission configuration indication states TCI states.

[0042] In combination with the second aspect, in a possible implementation, the method further includes: receiving a first medium access control element MAC CE signaling, where the first MAC CE is used to activate at least one TCI state, wherein the at least one activated TCI state includes the TCI state of the uplink transmission of the terminal device.

[0043] With reference to the second aspect, in a possible implementation, the method further includes: sending path loss information corresponding to the first path loss reference signal, where the path loss information is used to determine the first path loss.

[0044] In a third aspect, a communication device is provided, the device being configured to execute the method of any possible implementation of the first aspect. Specifically, the device may include units and / or modules, such as a transceiver unit and / or a processing unit, for executing the method of any possible implementation of the first aspect.

[0045] In one implementation, the apparatus is a terminal device. When the apparatus is a communication device, the communication unit may be a transceiver or an input / output interface; and the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0046] In another implementation, the device is a chip, chip system, or circuit for a terminal device. When the device is a chip, chip system, or circuit for a communication device, the communication unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; and the processing unit may be at least one processor, processing circuit, or logic circuit.

[0047] In a fourth aspect, a communication device is provided, the device being configured to execute the method of any possible implementation of the second aspect. Specifically, the device may include units and / or modules, such as a transceiver unit and / or a processing unit, for executing the method of any possible implementation of the second aspect.

[0048] In one implementation, the apparatus is a network device. When the apparatus is a communication device, the communication unit may be a transceiver or an input / output interface; and the processing unit may be at least one processor. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input / output interface may be an input / output circuit.

[0049] In another implementation, the device is a chip, chip system, or circuit for a network device. When the device is a chip, chip system, or circuit for a communication device, the communication unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; and the processing unit may be at least one processor, processing circuit, or logic circuit.

[0050] In yet another possible implementation, the apparatus may be a CU (CU-CP or CU-UP), a DU, or a RU in a network device.

[0051] In a fifth aspect, a communication device is provided, comprising: at least one processor configured to execute a computer program or instructions stored in a memory to perform the method of any possible implementation of any of the first aspects. Optionally, the device further comprises a memory configured to store the computer program or instructions. Optionally, the device further comprises a communication interface, through which the processor reads the computer program or instructions stored in the memory.

[0052] In one implementation, the apparatus is a terminal device.

[0053] In another implementation, the apparatus is a chip, a chip system, or a circuit for a terminal device.

[0054] In a sixth aspect, a communication device is provided, comprising: at least one processor configured to execute a computer program or instructions stored in a memory to perform the method of any possible implementation of the second aspect. Optionally, the device further comprises a memory configured to store the computer program or instructions. Optionally, the device further comprises a communication interface, through which the processor reads the computer program or instructions stored in the memory.

[0055] In one implementation, the apparatus is a network device.

[0056] In another implementation, the apparatus is a chip, a chip system, or a circuit for a network device.

[0057] In yet another implementation, the apparatus may be a CU (CU-CP or CU-UP), a DU, or a RU in a network device.

[0058] The communication device may be a terminal, or a communication module in a terminal, or a chip in the terminal responsible for communication functions such as a modem chip (also known as a baseband chip) or a SoC or SIP chip including a modem module.

[0059] In a seventh aspect, the present application provides a processor, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method of any possible implementation of any one of the first and second aspects.

[0060] In a specific implementation, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a transceiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter. The input circuit and the output circuit may be the same circuit, which functions as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation of the processor and various circuits.

[0061] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or if they do not conflict with their actual functions or internal logic in the relevant descriptions, they can be understood as processor output, reception, input and other operations, and can also be understood as sending and receiving operations performed by the radio frequency circuit and antenna. This application does not limit this.

[0062] In an eighth aspect, a processing device is provided, comprising a processor and a memory. The processor is configured to read a computer program or instruction stored in the memory, and to receive a signal via a transceiver and transmit a signal via a transmitter to execute the method of any possible implementation of any one of the first and second aspects.

[0063] Optionally, there are one or more processors and one or more memories.

[0064] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0065] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated with the processor on the same chip or can be set on different chips. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0066] It should be understood that related data interaction processes, such as sending indication information, can be the process of outputting indication information from the processor, and receiving capability information can be the process of receiving input capability information from the processor. Specifically, data output by the processor can be output to the transmitter, and input data received by the processor can be received from the transceiver. The transmitter and transceiver can be collectively referred to as a transceiver.

[0067] The processing device in the eighth aspect may be one or more chips. The processor in the processing device may be implemented in hardware or software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated into the processor or located independently of the processor.

[0068] In a ninth aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, wherein the program code includes a method for executing any possible implementation of the first to second aspects above.

[0069] In a tenth aspect, a computer program product comprising instructions is provided, which, when run on a computer, enables the computer to execute the method in any possible implementation of the first to second aspects above.

[0070] In the eleventh aspect, a chip system is provided, comprising a processor for calling and running a computer program from a memory, so that a device equipped with the chip system executes the methods in each implementation of any one of the first or second aspects above.

[0071] In a twelfth aspect, a communication system is provided, comprising the terminal device and the network device. The terminal device is configured to execute any possible implementation method of any aspect of the first aspect, and the network device is configured to execute any possible implementation method of any aspect of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] FIG1 is a schematic diagram of a communication scenario to which the present application is applicable.

[0073] FIG2 is a schematic diagram of a communication system architecture applicable to the present application.

[0074] FIG3 is a schematic diagram of the network element functions and protocol layer structure of the open radio access network O-RAN shown in this application.

[0075] FIG4 is a schematic diagram of a signaling format for activating TCI State provided in this application.

[0076] FIG5 is another schematic diagram of a communication scenario to which the present application is applicable.

[0077] FIG6 is a schematic flowchart of a method 600 for determining uplink transmission provided by the present application.

[0078] FIG7 is a schematic diagram of another format of signaling for activating TCI State provided in this application.

[0079] FIG8 is a schematic block diagram of the communication device 100 provided in this application.

[0080] FIG9 is a schematic block diagram of a communication device 200 provided in this application. DETAILED DESCRIPTION

[0081] The technical solution in this application will be described below with reference to the accompanying drawings.

[0082] The technical solution provided in this application can be applied to various communication systems, such as universal mobile telecommunications system (UMTS), wireless local area network (WLAN), wireless fidelity (Wi-Fi) system, 4th generation (4G) mobile communication system, such as long term evolution (LTE) system, fifth generation (5G) mobile communication system, such as new radio (NR) system, and future evolved communication systems.

[0083] This application will present various aspects, embodiments, or features in the context of systems that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. Furthermore, combinations of these aspects may also be used.

[0084] In addition, in the embodiments of the present application, words such as "exemplarily" and "such as" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as an "example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "example" is intended to present concepts in a concrete way. In the embodiments of the present application, "of", "corresponding, relevant" and "corresponding" can sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings to be expressed are consistent.

[0085] The communication system and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0086] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0087] The "terminal device" in this application can also be understood as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device.

[0088] The terminal device can be a device that provides voice / data to users, for example, a handheld device or vehicle-mounted device with a wireless connection function. Currently, some examples of terminals include: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes (such as game consoles, smart TVs, smart speakers, smart refrigerators and fitness equipment, etc.), cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, transportation vehicles with wireless communication capabilities, communication modules, road side units with terminal functions. unit, RSU), terminal equipment in a 5G network, or terminal equipment in a future evolved public land mobile network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0089] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0090] In addition, in the embodiments of the present application, the terminal device can also be a terminal device in an IoT system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things.

[0091] It should be noted that the terminal device and the access network device can communicate with each other using a certain air interface technology (such as NR or LTE technology). The terminal devices can also communicate with each other using a certain air interface technology (such as NR or LTE technology).

[0092] In the embodiments of the present application, the device for implementing the function of the terminal device can be the terminal device, or it can be a device that can support the terminal device to implement the function, such as a chip system or chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0093] The "network device" in this application can also be understood as a radio access network (RAN), which is used to provide network access functions for authorized users in a specific area, and can use transmission tunnels of different qualities according to the user's level, business requirements, etc. RAN network elements can manage wireless resources, provide access services for terminal devices, and then complete the forwarding of control signals and user data between terminal devices and the core network. RAN can also be understood as a base station in a traditional network. The network device in this application can also be a wireless controller in a cloud radio access network (CRAN) scenario. The network device can also be a base station device in a future 5G network or a network device in a future evolved PLMN network. The network device can also be a wearable device or a vehicle-mounted device.

[0094] A network device can also be a transmission and reception point (TRP), where a TRP is a device or module that has corresponding communication functions. The TRP typically contains a communication module, circuit, or chip that performs the corresponding communication function. The TRP also contains programs or instructions for performing the corresponding communication function, as well as the corresponding programs or instructions.

[0095] For example, the TRP in the embodiments of the present application may be a radio access network (RAN) device or network element deployed in the RAN. For example, the TRP may be a RAN device or a device capable of supporting the RAN device to implement the function, such as a chip system or a combination device or component that can implement the function of the access network device, and the device may be installed in the RAN device. For example, a TRP can be an access point (AP) in a Wi-Fi system, such as a home gateway, router, server, switch, or bridge; a base station, base station controller (BSC), base transceiver station (BTS), home base station, baseband unit (BBU), wireless relay node, or wireless backhaul node. It can also be an evolved node B (eNB) in a 4G system, or a next-generation eNB (ng-eNB) during the transition from 4G to 5G systems, or a next-generation NodeB (gNB) in a 5G system, or a RAN node that implements (partial) gNB functions. A RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be configured separately or included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). Alternatively, the TRP may be a satellite or various future base stations. In addition, the TRP may be a macro base station, a micro base station, an indoor station, a relay node, a donor node, etc.

[0096] Figure 1 is a schematic diagram of a communication scenario applicable to the present application. As shown in Figure 1, the communication scenario applicable to the present application includes multiple network devices, and the terminal device can transmit data and / or control signaling with multiple network devices at the same time.

[0097] Figure 2 is a schematic diagram of a communication system architecture applicable to the present application. As shown in Figure 2, the communication system architecture shown in the present application is an example diagram of an open radio access network (O-RAN) system. It should be understood that the O-RAN system may include other components in addition to the components shown in Figure 2. The access network device in Figure 2, such as an eNB or gNB or next-generation access network device, communicates with the core network (CN) via a backhaul link and communicates with the user equipment (UE) via an air interface. Specifically, the baseband unit (BBU) in the access network device communicates with the core network via a backhaul link, and the radio unit (RU) in the access network device communicates with at least one UE via an air interface. The BBU communicates with at least one RU via a fronthaul link, and the BBU and RU may or may not be co-located. The BBU includes at least one control unit (CU) and at least one distributed unit (DU), which may communicate via at least one midhaul link.

[0098] Figure 3 is a schematic diagram of the network element functions and protocol layer structure of the open radio access network (O-RAN) shown in this application. As shown in Figure 3, in some examples, the CU is a logical node that carries the radio resource control (RRC) layer, service data adaptation protocol (SDAP) layer, packet data convergence protocol (PDCP) layer, and other control functions of the access network equipment. The CU is connected to network nodes such as the core network through some interfaces, which can be interfaces such as E2 interfaces. Optionally, the CU can have some functions of the core network. The CU (such as the PDCP layer and higher layers) is connected to the DU (such as the RLC layer and lower layers) through some interfaces, which can be interfaces such as F1 interfaces. In some examples, these interfaces (such as the F1 interface) can provide control plane (C-Plane) and user plane (U-Plane) functions (such as interface management, system information management, UE context management, RRC message transmission, etc.). F1AP is the application protocol of the F1 interface and, in some examples, defines the F1 signaling process. The F1 interface supports the control plane F1-C and the user plane F1-U.

[0099] In some examples, the CU can be split into a control unit-control plane (CU-CP) and a control unit-user plane (CU-UP), where the CU-CP is a logical node that carries the RRC layer and the control plane part of PDCP (PDCP-C) layer, and is used to implement the control plane function of the CU. The CU-CP can interact with the network elements in the core network that are used to implement the control plane function. The network elements in the core network that are used to implement the control plane function can be access and mobility function network elements, such as the access and mobility management function (AMF) in the 5G system. The AMF network element is responsible for mobility management in the mobile network, such as location update of terminal devices, registration network of terminal devices, handover of terminal devices, etc. The CU-UP is a logical node that carries the SDAP layer and the user plane part of PDCP (PDCP-U) layer, and is used to implement the user plane function of the CU. The CU-UP can interact with the network elements in the core network that are used to implement the user plane function. The network element used to implement the user plane function in the core network, for example, the user plane function (UPF) network element in the 5G system, is responsible for forwarding and receiving data in the terminal device. The above configuration of CU and DU is only an example, and the functions of CU and DU can also be configured as needed. For example, the CU or DU can be configured to have the functions of more protocol layers, or the CU or DU can be configured to have partial processing functions of the protocol layer. For example, some functions of the RLC layer and the functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are set in the DU. For another example, the functions of the CU or DU can be divided according to the service type or other system requirements, such as by delay, and the functions that need to meet the smaller delay requirements for processing time are set in the DU, and the functions that do not need to meet the delay requirements are set in the CU.

[0100] In some examples, the DU is a logical node that carries the radio link control (RLC) layer, the medium access control (MAC) layer, the higher physical layer (Higher PHY) layer, and other functions. In some examples, the DU can control at least one RU. The DU is connected to the RU through some interfaces, which can be fronthaul interfaces. In some examples, the Higher PHY layer includes parts of the PHY layer processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, and other processing functions.

[0101] In some examples, the RU is a logical node that carries the lower physical layer (Lower PHY) and radio frequency (RF) processing. In some examples, the RU can be a 3GPP transmission reception point or a remote radio head (RRH) or other entity with similar functions. In some examples, Low-PHY includes parts of the PHY processing, such as fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), digital beamforming and filtering, and other processing functions. The RU communicates with one or more UEs over a wireless link.

[0102] The DU and RU may or may not be co-located. The DU and RU exchange control plane information and user plane information via the lower-layer split CUS-Plane (LLS-CUS) interface over the fronthaul link. The LLS-CUS may include an LLS-C interface and an LLS-U interface that provide a control plane (C-Plane) and a user plane (U-Plane), respectively. In some examples, the control plane (C-Plane) refers to real-time control between the DU and RU. The DU and RU exchange management information via the LLS-M interface of the fronthaul link, and the management plane (M-Plane) refers to non-real-time management operations between the DU and RU.

[0103] The DU and RU can work together to implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of the DU and RU can be configured in various ways according to the design. For example, the DU is configured to implement the baseband function, and the RU is configured to implement the mid-RF function. For another example, the DU is configured to implement the high-layer functions in the PHY layer, and the RU is configured to implement the low-layer functions in the PHY layer or to implement the low-layer functions and the RF functions. The high-layer functions in the physical layer may include a part of the functions of the physical layer, which is closer to the MAC layer, and the low-layer functions in the physical layer may include another part of the functions of the physical layer, which is closer to the mid-RF side.

[0104] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples for description.

[0105] In order to facilitate understanding of the technical solution of this application, the following first briefly introduces some of the professional terms involved in this application.

[0106] 1. Uplink transmission

[0107] The "uplink transmission" in this application can be carried on one or more channels of the physical uplink control channel (PUCCH), the physical uplink shared channel (PUSCH), and the physical random access channel (PRACH).

[0108] Uplink transmission may be the transmission of uplink information, which may be one or more of uplink control information (UCI), scheduling request (SR), channel state information (CSI), hybrid automatic repeat request (HARQ), and medium access control-control element (MAC CE) signaling. Uplink transmission may also be the transmission of an uplink reference signal, for example, a sounding reference signal (SRS).

[0109] 2. Reference signal (RS)

[0110] The reference signal, also known as a pilot signal, is a known signal provided by a transmitting device to a receiving device for channel estimation, channel measurement, channel detection, or channel demodulation.

[0111] In the embodiment of the present application, the reference signal may be applied to the physical layer and does not carry data information from a higher layer. Furthermore, the reference signal may include a downlink reference signal and an uplink reference signal.

[0112] Among them, downlink reference signals include the cell-specific reference signal (CRS) for downlink, the terminal equipment-specific reference signal (UE-RS) for downlink, the channel state information reference signal (CSI-RS) for downlink channel measurement, the group-specific reference signal (GRS) for downlink, the positioning reference signal (PRS) for downlink, the beam reference signal (BRS) for downlink, the beam refinement reference signal (BRRS) for downlink, or the phase compensation reference signal (PCRS) for downlink, the pathloss reference signal (PL-RS) for downlink, etc. Among them, the UE-RS for downlink is also called the demodulation reference signal (DMRS) for downlink. And the synchronization signal / physical broadcast channel block (SS / PBCH block). Among them, the SS / PBCH block can be simply referred to as a synchronization signal block (synchronization signal block, SSB).

[0113] Uplink reference signals include the demodulation reference signal (DMRS) used for uplink demodulation, the sounding reference signal (SRS) used for uplink channel measurement, and the uplink PCRS, etc. Among them, the DMRS used for physical uplink control channel (PUCCH) demodulation is called PUCCH DMRS, and the DMRS used for physical uplink shared channel (PUSCH) demodulation is called PUSCH DMRS.

[0114] In addition to the reference signal, the reference signal of the present application may also be a sequence signal from a set of sequence signals with good correlation characteristics. The good correlation characteristics are that any sequence in the set has a large autocorrelation peak, and any two sequences in the set have small cross-correlation peaks. That is, in the embodiments of the present application, the transmitting device may transmit multiple signals, at least one of which is a sequence signal with the above-mentioned good correlation, such as a pseudorandom sequence or a Zadoff-Chu sequence.

[0115] Specifically, correlation refers to calculating the correlation between a sequence signal and another sequence signal in the same set, resulting in a correlation value. Therefore, for sequence signals with good correlation characteristics, a receiving device can detect the presence of the signal based on the correlation. In other words, the transmission of sequence signals with good correlation does not require the use of detection mechanisms such as pilot signals. One example of a signal with good correlation characteristics is a reference signal (or pilot signal).

[0116] It should be understood that the specific examples of sequence signals listed above are only exemplary illustrations and the present application is not limited thereto. For example, the sequence signal may also be a signal for carrying feedback information (e.g., positive acknowledgment (ACK) information or negative acknowledgment (NACK) information), a resource request signal, or a measurement request signal, etc.

[0117] 3. Transmission Configuration Indicator State (TCI State)

[0118] Network equipment can generate different beams pointing to different transmission directions. In downlink data transmission, when a network device uses a specific beam to send data to a terminal device, it needs to inform the terminal device of the transmission beam information it uses, so that the terminal device can use the receiving beam corresponding to the transmitting beam to receive the data sent by the network device. In the 3GPP R15 / R16 protocol, the network device uses the transmission configuration indicator (TCI) field in the downlink control information (DCI) to indicate to the terminal device the relevant information of the transmitting beam it uses. Specifically, the TCI field size is 3 bits and can specifically represent 8 different field values ​​(codepoints). Each value of the TCI field corresponds to a TCI-state index, and the TCI-state index can uniquely identify a TCI-state. The TCI-state includes several parameters, and the relevant information of the transmitting beam can be determined by these parameters.

[0119] The TCI-state is configured by the network device for each terminal device. Each TCI-state includes its own index (denoted as tci-StateId) and two quasi-colocation information (QCL-Info). Each QCL-Info includes a cell field and a bandwidth part identifier (bwp-Id), which respectively indicate which bandwidth part (BWP) of which cell the TCI-state applies to. That is, different cells or different BWPs of the same cell can be configured with different QCL-Info. QCL-Info also includes a reference signal indicator to indicate which reference signal resource forms a quasi co-location (QCL) relationship. In the R15 / R16 protocol, the word "beam" generally does not appear directly; beams are generally replaced by other terms. For example, in data transmission and channel measurement, beams correspond to reference signal resources, and one beam corresponds to one reference signal resource. Therefore, when we say which reference signal resource forms a QCL relationship here, we actually mean which beam forms a QCL relationship. A QCL relationship means that two reference signal resources (or two antenna ports, where antenna ports and reference signal resources also have a one-to-one correspondence) have certain identical spatial parameters. Which specific spatial parameters are identical depends on the type of QCL-Info, i.e., another field qcl-Type of QCL-Info. qcl-Type can have four values, including:

[0120] Type A: Doppler shift, Doppler spread, average delay, delay spread;

[0121] Type B: Doppler shift, Doppler spread;

[0122] Type C: Doppler shift, average delay;

[0123] Type D: space receiving parameters.

[0124] Taking type D as an example, type D indicates that two reference signal resources have the same spatial reception parameter information, that is, the two beams have the same receive beam. Generally, at most one of the two QCL-Info included in the TCI-state is type D.

[0125] Before using the TCI state, the terminal device may go through three processes: "configuration", "activation" and "indication". Each process is introduced below.

[0126] (1) TCI-state configuration: The network device configures multiple TCI-states to the terminal device through radio resource control (RRC) signaling.

[0127] (2) TCI-state activation: After a network device is configured with multiple TCI-states, it must activate eight of them through MAC-CE. These eight TCI states correspond one-to-one to the eight values ​​of the TCI field in the DCI. The TCI-states corresponding to the eight values ​​of the DCI TCI field are determined through MAC CE signaling.

[0128] (3) TCI-state indication: The network device indicates a specific TCI-state through the TCI field in the DCI. Based on the specific value of the TCI field, the terminal device can determine the corresponding receive beam of the data transmission beam and use the corresponding receive beam to receive data.

[0129] 4. Unified TCI

[0130] Unified TCI is introduced in R17. Unified TCI is a unified beam indication framework. The network device can indicate a beam to the terminal device, and the beam is used for multiple channels and / or reference signals at the same time. The common beam can be an uplink common beam, a downlink common beam, or an uplink and downlink common beam. The terminal device can use the common beam in subsequent transmissions. That is, the network device can indicate an uplink common beam to the terminal device for the transmission of multiple uplink channels and / or uplink reference signals. It can also indicate a downlink common beam to the terminal device for the transmission of multiple downlink channels and / or downlink reference signals. It can also indicate an uplink and downlink common beam to the terminal device for the transmission of multiple uplink channels and / or uplink reference signals, as well as multiple downlink channels and / or downlink reference signals. In other words, the uplink and downlink common beams can be used for both uplink and downlink transmissions.

[0131] Exemplarily, in R17 and later, the terminal can configure two TCI states: DL or joint TCI and UL TCI. Take the terminal device as UE and the network device as base station as an example. For example, the UE can simultaneously configure the joint / downlink (DL) TCI state (up to 128) and UL TCI state (up to 64). For another example, in the serving cell configuration (serving cell configuration) of the RRC signaling, the base station can configure the TCI mode currently used by the UE to be joint mode or separate mode. In Joint mode, it is indicated that a joint TCI state can be used for both uplink and downlink transmissions; in separate mode, the base station needs to indicate that the DL TCI state and the UL TCI state are used for uplink and downlink transmissions respectively.

[0132] In addition, when the UE receives TCI state activation signaling indicated by MAC-CE, the activation signaling includes an identifier (ID) of the TCI state, and the UE determines which TCI is activated by MAC-CE according to the RRC configuration.

[0133] For example, Figure 4 shows an implementation example of TCI state activation signaling. If the RRC configures the UE in joint mode, the TCI state ID is the ID of the joint TCI state. If the RRC configures the UE in separate mode, the UE determines whether the TCI state ID is the ID of the DL TCI state or the ID of the uplink (UL) TCI state based on the value of the D / L field. (For example, 0 is UL TCI and 1 is DL TCI).

[0134] 5. Path loss (PL)

[0135] The term "path loss" in this application can be used interchangeably with terms such as path loss, transmission loss, signal attenuation, signal attenuation loss, attenuation loss, transmission loss, signal loss, transmission path loss, path loss estimation value, and path loss estimation value. In existing protocols, terminal devices can estimate path loss through the downlink reference signal "synchronization signal-broadcast channel measurement resource block" (synchronization signal and PBCH block, SSB) and channel state information reference signal (channel state information reference signal, CSI-RS). Path loss can also be estimated through uplink reference signals (for example, SRS). This application does not limit which reference signals the path loss reference signal is.

[0136] Typically, path loss is calculated as PL = referenceSignalPower – higher layer filtered RSRP. ReferenceSignalPower is the reference signal power configured by the network device for transmission, while higher layer filtered RSRP is the reference signal power received by the terminal, filtered by higher layers. The difference between the two is the path loss.

[0137] In the protocol, the downlink reference signal used for path loss estimation is called a "path loss reference signal" (PL RS). For example, when the PL RS is SSB, referenceSignalPower = ss–PBCH-Blockpower, where "ss–PBCH-Blockpower" is configured by the network device. When the PL RS is periodic CSI-RS, referenceSignalPower = ss–PBCH-Blockpower + powerControlOffsetSS, where "powerControlOffsetSS" is the offset from the SSB power configured by the network device. If this value is not configured, it defaults to 0.

[0138] 6. Transmit power

[0139] In the unified TCI framework, the TCI state (DL or joint TCI state or UL TCI state) is associated with a path loss reference signal. During uplink transmission, the terminal device determines the path loss reference signal based on the uplink transmission indication or the configured TCI state, and estimates the corresponding path loss value based on the path loss reference signal. In addition, the TCI state is also associated with an uplink power control parameter "ul-powerControl", which contains the power control parameter set AlphaSet for SRS, PUCCH, and PUSCH. Each AlphaSet contains: reference power (p0), path loss correction factor (alpha), and closed-loop power control adjustment state index (closedLoopindex).

[0140] The transmit power of PUSCH, PUCCH, SRS and PRACH sent by the terminal device is mainly related to the maximum transmit power of the terminal device, the expected receive power level of the network device, path loss, path loss correction factor, closed-loop power control adjustment, power adjustment status, number of transmission resource blocks, subcarrier spacing, etc.

[0141] (1) As an example, taking PUSCH as an example, the UE's transmit power P PUSCH,b,f,c (i,j,q d ,l) satisfies the following formula:

[0142] Among them, P PUSCH,b,f,c (i,j,q d ,l) is the minimum value of the two items in the above brackets;

[0143] b, f, c: corresponding to UL BWP index, carrier index, serving cell index;

[0144] i: corresponds to the transmission opportunity, which is defined by the time slot index of the system frame number and the symbol within the time slot;

[0145] j: parameter set configuration index. For example, j = 0, indicates the power control of message 3 (msg3); j = 1, indicates the PUSCH power control of the configured grant configuration (ConfiguredGrantConfig); j = 2 to J, the rest of the normal power control;

[0146] qd: path loss reference signal index (can be SSB or CSI-RS. In the Unified TCI framework, it is determined by the path loss reference signal associated with the TCI state of the uplink transmission);

[0147] μ is the index of the subcarrier spacing configuration;

[0148] l: power control adjustment state index;

[0149] P CMAX,f,c (i) is the maximum transmit power of the UE;

[0150] P O_PUSCH,b,f,c (j) is the expected receiving power level of the network device;

[0151] α b,f,c (j) is the path loss correction factor;

[0152] PL b,f,c (q d ) is the downlink path loss estimated by the terminal according to the path loss reference signal;

[0153] The number of resource blocks allocated for sending PUSCH;

[0154] Δ TF,b,f,c (i) The power offset values ​​of different modulation and coding scheme (MCS) formats relative to the reference MCS;

[0155] f b,f,c (i, l) is the adjustment amount of the transmit power, which is obtained from the transmit power control (TPC) information of the physical downlink control channel (PDCCH).

[0156] (2) As another example, taking SRS as an example, the UE's transmit power P SRS,b,f,c (i,q s ,l)Satisfy:

[0157] P SRS,b,f,c (i,q s ,l) is the minimum value of the two items in the above brackets;

[0158] P O_SRS,b,f,c (j) is the expected receiving power level of the network device;

[0159] α SRS,b,f,c (q s ) is the path loss correction factor;

[0160] M SRS,b,f,c (i) The number of resource blocks allocated for transmitting SRS;

[0161] q sis the path loss reference signal index (which can be SSB or CSI-RS. In the Unified TCI framework, it is determined by the path loss reference signal associated with the TCI state of the uplink transmission);

[0162] h b,f,c (i, l) is the adjustment amount of the transmit power, which is obtained from the transmit power control TPC information of the PDCCH.

[0163] The remaining parameters can refer to the P in the above formula (1). PUSCH,b,f,c (i,j,q d , parameter definition in l).

[0164] (3) As another example, taking PUCCH as an example, the UE's transmit power P SRS,b,f,c (i,q s ,l)Satisfy:

[0165] P PUCCH,b,f,c (i,q u ,q d ,l) is the minimum value of the two items in the above brackets;

[0166] q u is the path loss reference signal index (which can be SSB or CSI-RS. In the Unified TCI framework, it is determined by the path loss reference signal associated with the TCI state of the uplink transmission);

[0167] P O_PUCCH,b,f,c (q u ) is the expected receiving power level of the network device;

[0168] The number of resource blocks allocated for transmitting PUCCH;

[0169] Δ F_PUCCH (F) is the power offset value of different MCS formats relative to the reference MCS;

[0170] g b,f,c (i, l) is the adjustment amount of the transmit power, which is obtained from the transmit power control TPC information of the PDCCH.

[0171] The remaining parameters can refer to the above formula (1)P PUSCH,b,f,c (i,j,q d , parameter definition in l).

[0172] 7. Spatial relation

[0173] In the current protocol, "spatial relation" can be used to indicate uplink beams. The uplink transmission beam is indicated by a spatial relation, which functions similarly to TCI-state, informing the terminal device which transmission beam to use for uplink transmission.

[0174] Generally, the spatial relation can also be configured first through RRC signaling, including the spatial relation ID, cell ID, target reference signal resource, path loss measurement reference signal, power control parameters, etc. Among them, the target reference signal resource (which can be one of SRS / SSB / CSI-RS) is used to indicate the corresponding uplink beam. If the uplink transmission adopts spatial relation#1, and the spatial relation#1 includes a target reference signal resource#2, it means that the transmission beam adopted for the uplink transmission is the transmission / reception beam of the target reference signal. For example, when the target reference signal resource is the uplink resource SRS, it means that the transmission beam adopted for the uplink transmission is the transmission beam of the SRS (the transmission beam of the SRS is known). For another example, if the target reference signal resource is a downlink resource such as SSB / CSI-RS, it means that the transmission beam adopted for the uplink transmission is the reception beam of the SSB / CSI-RS (the reception beam of the SSB / CSI-RS is known).

[0175] Network equipment can configure multiple spatial relations for a terminal device. One of these relations is then activated via MAC CE for the corresponding data transmission. Uplink transmissions, including PUCCH, SRS, and PUSCH, all require a corresponding spatial relation. The PUCCH spatial relation is indicated via MAC-CE signaling. The SRS spatial relation is also indicated via MAC-CE signaling. PUSCH transmissions are associated with a specific SRS and use the spatial relation of that SRS for transmission.

[0176] 8. First line loss, second line loss

[0177] The "second path loss" mentioned in this application can be understood as the second path loss determined based on the first path loss reference signal. For example, the path loss can be determined based on the aforementioned path loss calculation formula "PL = referenceSignalPower - higher layer filtered RSRP".

[0178] The "second path loss" in this application can also be understood as PL#2.

[0179] The "first path loss" mentioned in this application can be understood as any one of at least two path losses. For example, the first path loss can be PL#1; for another example, the first path loss can be PL#2.

[0180] The "first path loss" in this application can also be understood as the path loss adjustment amount superimposed on the second path loss determined according to the first path loss reference signal. The path loss adjustment amount can be recorded as PL offset Alternatively, ΔPL represents the difference between the first path loss and the second path loss, or the difference between the second path loss and the first path loss.

[0181] Figure 5 is another schematic diagram of a communication scenario applicable to the present application. As shown in Figure 5, the terminal device can communicate with network device #1 and network device #2 at the same time. Among them, network device #2 has both uplink transmission and downlink transmission functions, while network device #1 only has uplink transmission function. When the terminal device communicates through network device #2, the downlink signal quality is good, but the uplink signal quality is poor. In this case, the terminal device can further establish a connection with network device #1 and perform joint uplink transmission based on TRP #1 and TRP #2, that is, the terminal device can transmit uplink signals to network device #1 and network device #2 to improve its uplink transmission performance. The transmission of uplink signals by the terminal device to network device #1 and network device #2 can be called uplink multi-TRP transmission. Uplink multi-TRP transmission includes one or more of the following transmission modes. Unless otherwise specified, the method of the present application is applicable to scenarios corresponding to any of the following modes.

[0182] Mode 1: The terminal device transmits the same data to two network devices at different times. The network side combines the same data signals received by network device #1 and network device #2 to improve the signal strength of the data.

[0183] Mode 2: The terminal device transmits the same data to two network devices at the same time. The network side improves the signal strength of the data by combining the same data signals received by network device #1 and network device #2.

[0184] Mode 3: The terminal device transmits different data or different data streams of the same data to two network devices at the same time, thereby increasing the amount of uplink transmission data and improving uplink transmission performance.

[0185] In free space, the intensity of electromagnetic waves decreases with increasing propagation distance. The loss incurred during free-space propagation is called path loss. As electromagnetic wave signals transmitted by the transmitter propagate through the wireless channel, they are affected by path loss, resulting in reduced signal strength upon reaching the receiver. Therefore, when the receiver is far away, the transmitter needs to appropriately adjust the signal transmission power to compensate for the effects of path loss. In mobile communication systems, because the transmit power of terminal devices is generally lower than that of network equipment, the signal strength of uplink transmissions is generally lower than that of downlink transmissions. This results in better downlink performance for terminal devices but poorer uplink performance.

[0186] To address this issue, as shown in Figure 5, one solution is to deploy low-cost network devices that only have uplink transmission capabilities. If such network devices are nearby, terminal devices can use them for uplink transmission, thereby improving uplink transmission performance. However, since these network devices are only capable of uplink transmission and not downlink transmission, i.e., they do not send downlink reference signals, existing solutions make it impossible for terminal devices to estimate the uplink transmission path loss with these network devices. Consequently, terminal devices are unable to determine the uplink transmission power to these network devices, which in turn affects uplink transmission performance.

[0187] In view of this, in the present application, it is first proposed that the first path loss reference can be used to determine at least two path losses. Exemplarily, the terminal device can use the first path loss reference signal between the terminal device and the network device #2 as the path loss reference signal for uplink transmission with the network device #1. For example, the first path loss reference signal may be the downlink path loss reference signal between the terminal device and the network device #2 shown in Figure 5. Exemplarily, the first path loss reference signal may be a downlink path loss reference signal sent by the network device #2 to the terminal device. For example, the downlink path loss reference signal may be an SSB; for another example, the downlink path loss reference signal may be a CSI-RS; for another example, the first path loss reference signal is an uplink reference signal between the terminal device and the network device. In this case, the first path loss reference signal can determine at least two path losses, for example, PL#1 (an example of the first path loss) and PL#2 (another example of the first path loss). PL#1 can be the path loss for uplink transmission between the terminal device and network device #1, and PL#2 (an example of the second path loss) can be the path loss for uplink transmission between the terminal device and network device #2. It should be noted that PL#2 can be directly calculated using the path loss calculation method described above based on the power of the first path loss reference signal transmitted by network device #2 and the power of the first path loss reference signal received by the terminal device.

[0188] From the above, it can be seen that the first path loss reference signal can be used to determine at least two path losses. In a specific uplink transmission, the terminal device needs to clearly determine which of the at least two path losses should be used, so as to determine the transmission power of this uplink transmission, and then ensure the performance of the uplink transmission.

[0189] Furthermore, this application proposes a method for determining path loss. A terminal device may receive first information from a network device. Because the first information indicates a first path loss among at least two path losses, and the at least two path losses are determined based on a first path loss reference signal, the terminal device may determine the first path loss based on the received first information and the first path loss reference signal. This first path loss may be used for uplink transmission. Based on this method, the terminal device may determine the path loss to be used for the current uplink transmission among the at least two path losses, thereby ensuring uplink transmission performance.

[0190] FIG6 is a schematic flow chart of a method 600 for determining path loss provided by the present application. As shown in FIG6 , the method includes:

[0191] 610. The network device sends first information, where the first information is used to indicate that a first path loss reference signal is used to determine a first path loss among at least two path losses.

[0192] Correspondingly, the terminal device receives the first information.

[0193] In one possible scenario, "first information is used to indicate that the first path loss reference signal is used to determine a first path loss among at least two path losses" can also be understood as indicating that the first path loss reference signal is used to determine any one of the at least two path losses. For example, using the example of the first path loss reference signal being used to determine two path losses, the first information indicates whether the first path loss reference signal is used to determine PL#1 or PL#2 among the two path losses.

[0194] In another possible scenario, "first information indicating that the first path loss reference signal is used to determine a first path loss among at least two path losses" can also be understood as indicating whether the first path loss is superimposed with a path loss adjustment value on the second path loss determined based on the first path loss reference signal. Specifically, the method for determining the second path loss based on the first path loss reference signal can refer to the aforementioned formula "PL = referenceSignalPower – higher layer filtered RSRP," where "referenceSignalPower" is the power configured by the network device to transmit the first path loss reference signal, and "higher layer filtered RSRP" is the power of the first path loss reference signal received by the terminal, after filtering by higher layers. The difference between the two is path loss PL#2, and the path loss adjustment value is the difference between the first path loss PL#1 and the second path loss PL#2. For example, path loss adjustment value = PL#1 - PL#2, or path loss adjustment value = PL#2 - PL#1.

[0195] In the present application, the path loss corresponding to the uplink transmission using the first path loss reference signal is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission needs to superimpose a path loss adjustment amount on PL#2 determined according to the first path loss reference signal.

[0196] In this application, there are multiple implementation methods for implementing step 610, and each implementation method is introduced below.

[0197] Method 1

[0198] The first information includes an association relationship between a TCI state corresponding to the uplink transmission and a first path loss correction factor among at least two path loss correction factors, wherein the TCI state corresponds to a first path loss reference signal, the at least two path loss correction factors correspond one-to-one with the at least two path losses, and the first path loss correction factor corresponds to the first path loss.

[0199] Exemplarily, the first information may be RRC signaling, DCI signaling, or MAC CE signaling, etc., without limitation.

[0200] The “TCI state” mentioned in this application may be any one or a combination of the aforementioned DL or joint TCI state, UL TCI state, or spatial relation.

[0201] In method 1, the network device can configure two path loss correction factors alpha for the terminal device and configure an association between the TCI state and one of the at least two alphas. This can be understood as two path loss correction factors corresponding to a path loss reference signal associated with the TCI state. The two alphas correspond to two alpha indices, respectively, and the TCI state can be configured to associate with the index corresponding to one of the at least two alphas.

[0202] In one possible scenario, it is assumed that the network device has configured an association relationship between the TCI state and the first alpha of the at least two alphas for the terminal device. For example, the terminal device determines, based on the first alpha associated with the TCI state of the uplink transmission, that the first path loss reference signal associated with the TCI state is used to determine PL#1, or the terminal device may determine that a path loss adjustment amount needs to be superimposed on PL#2 determined based on the first path loss reference signal. For example, the path loss corresponding to the uplink transmission using the TCI state is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission needs to superimpose a path loss adjustment amount on PL#2 determined by the first path loss reference signal. In this scenario, it is assumed that the network device has configured an association relationship between the TCI state and the second alpha of the at least two alphas, for example, the terminal device determines, based on the second alpha associated with the TCI state of the uplink transmission, that the first path loss reference signal associated with the TCI state is used to determine PL#2, or the terminal device may determine that a path loss adjustment amount does not need to be superimposed on PL#2 determined based on the first path loss reference signal. For example, the path loss corresponding to the uplink transmission using the TCI state is PL#2 among the at least two path losses, or the path loss corresponding to the uplink transmission does not need to have the path loss adjustment value superimposed on PL#2 determined by the first path loss reference signal.

[0203] In another possible scenario, assuming that the network device configures an association between the TCI state and the second alpha among the at least two alphas, the terminal device determines, based on the second alpha associated with the TCI state transmitted in the uplink, that the first path loss reference signal associated with the TCI state is used to determine PL#1. In other words, the terminal device can determine that a path loss adjustment amount needs to be superimposed on PL#2 determined based on the first path loss reference signal. In this scenario, assuming that the network device configures an association between the TCI state and the first alpha among the at least two alphas, for example, based on the first alpha associated with the TCI state transmitted in the uplink, the terminal device determines that the first path loss reference signal associated with the TCI state is used to determine PL#2. In other words, the terminal device can determine that a path loss adjustment amount does not need to be superimposed on PL#2 determined based on the first path loss reference signal.

[0204] Furthermore, in method 1, in a possible implementation, the network device can not only configure the association relationship between the TCI state and one of the at least two alphas for the terminal device, but can also dynamically adjust the values ​​of the first alpha and the second alpha. For example, the network device can send an indication signaling to the terminal device, where the indication signaling is used to indicate the values ​​of the first alpha and the second alpha, and the terminal device can determine the corresponding alpha value based on the received indication signaling. For example, when the terminal device subsequently determines the transmit power according to the above formulas (1) to (3), it uses the first path loss reference signal associated with the TCI state to determine PL#2, but the path loss correction factor in the formulas (1) to (3) is determined based on the value configured by the network device. It can also be understood that in this implementation, the value corresponding to the loss correction factor can change dynamically. In addition, in this implementation, PL#1 and PL#2 are the same, or in other words, PL#1 and PL#2 are both obtained based on the estimation of the first path loss reference signal, or in other words, it is not necessary to superimpose the path loss adjustment amount on PL#2 to obtain PL#1, that is, PL#1 and PL#2 are the same.

[0205] Exemplarily, the network device may dynamically adjust the first alpha value (e.g., alpha#0) or the second alpha value (e.g., alpha#1) through indication signaling. The indication signaling may include indexes of one or more downlink reference signals, and the first alpha value and / or second alpha value corresponding to each downlink reference signal. It should be noted that the one or more downlink reference signals include a first downlink path loss reference signal.

[0206] Exemplarily, the network device can dynamically adjust the first alpha value (e.g., alpha#0) or the second alpha value (e.g., alpha#1) through indication signaling. The indication signaling can include one or more TCI state indexes, and the first alpha value and / or second alpha value corresponding to each TCI state. It should be noted that the path loss reference signal associated with the one or more TCI states includes the first downlink path loss reference signal. Exemplarily, the "indication signaling" can be RRC signaling, DCI signaling, or MAC CE signaling, etc., without limitation.

[0207] Table 1 below shows the association between the alpha values ​​and the corresponding alpha values ​​for each downlink reference signal. In Table 1, alpha#0 and alpha#1 are the indexes corresponding to the alphas. As shown in Table 1, the downlink reference signals include SSB#0, CSI-RS#0, and CSI-RS#1. Each downlink reference signal corresponds to two alpha values ​​(corresponding to different indices) and their corresponding values.

[0208] Exemplarily, assuming that the first path loss reference signal corresponding to the TCI state is CSI-RS#1, and assuming that the network device configures the association relationship between the TCI state and the first alpha of the at least two alphas (for example, the index of the first alpha is alpha#0) for the terminal device. For example, based on alpha#0 associated with the TCI state of the uplink transmission, the terminal device can first estimate the path loss PL#2 (that is, also PL#1) based on the first path loss reference signal. Specifically, when determining the transmit power of the uplink transmission according to the above formulas (1) to (3), the "path loss adjustment factor" is the alpha value corresponding to alpha#0 corresponding to CSI-RS#1 in the following Table 1. In this scenario, it is assumed that the network device configures an association relationship between the TCI state and the second alpha of the at least two alphas (for example, the index of the second alpha is alpha#1). For example, the terminal device can first estimate the path loss PL#2 (that is, also PL#1) based on the first path loss reference signal according to the alpha#1 associated with the TCI state of the uplink transmission. Specifically, when determining the transmit power of the uplink transmission according to the above formulas (1) to (3), the "path loss adjustment factor" is the alpha value corresponding to alpha#1 corresponding to CSI-RS#1 in the following Table 1.

[0209] Table 1

[0210] Optionally, the indication signaling may further include a field for indicating whether a downlink reference signal in the indication signaling includes a first alpha value or a second alpha value. Assume that the "field" may be field #A. When the value of field #A is "0," it may indicate that the indication signaling does not include the second alpha value corresponding to the downlink reference signal. When the value of field #A is "1," it may indicate that the indication signaling includes the second alpha value corresponding to the downlink reference signal.

[0211] Exemplarily, the downlink reference signal index in the above table may also be an index of a TCI state, and the terminal device determines whether to use PL#1 or PL#2 based on the alpha index associated with the TCI state of the uplink transmission.

[0212] Method 2

[0213] The first information is at least one of the following: TCI state configuration information for uplink transmission, path loss reference signal configuration information, path loss correction factor configuration information for uplink transmission, and uplink power control parameter configuration information for uplink transmission. In this case, it can also be understood that the TCI state configuration information for uplink transmission, the path loss reference signal configuration information, the path loss correction factor configuration information for uplink transmission, or the uplink power control parameter configuration information for uplink transmission can be used to indicate whether the first path loss reference signal is used to determine a first path loss among at least two path losses, or to indicate whether a path loss adjustment amount needs to be superimposed on a second path loss determined based on the first path loss reference signal.

[0214] In one possible implementation, for example, a network device may include a field (e.g., field #1) in TCI state configuration information, path loss reference signal configuration information, path loss correction factor configuration information, Uplink-powerControl configuration information, or AlPhaseT configuration information. This field is used to indicate whether a first path loss reference signal is used to determine a first path loss of at least two path losses, or to indicate whether a path loss adjustment value is superimposed on a second path loss determined based on the first path loss reference signal. This solution is described in detail below:

[0215] Exemplarily, field #1 may be included in the TCI state configuration information. If this field is "True," it indicates that if uplink transmission uses this TCI state, the first path loss reference signal corresponding to this TCI state is used to determine PL#1 among at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. Alternatively, if this field is "False," it indicates that if uplink transmission uses this TCI state, the first path loss reference signal corresponding to this TCI state is used to determine PL#1 among at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. For example, the path loss corresponding to uplink transmission using this TCI state is PL#1 among at least two path losses, or the path loss corresponding to the uplink transmission needs to have a path loss adjustment amount superimposed on PL#2 determined by the first path loss reference signal.

[0216] Exemplarily, the configuration information for the path loss reference signal may include Field #1. If this field is "True," it indicates that if the reference signal is used as the first path loss reference signal for uplink transmission, the first path loss reference signal is used to determine PL#1 of at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. Alternatively, if this field is "False," it indicates that if the reference signal is used as the PL#1 reference signal for uplink transmission, the first path loss reference signal is used to determine the first path loss of at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. For example, the path loss corresponding to the uplink transmission using the first path loss reference signal is PL#1 of the at least two path losses, or that the path loss corresponding to the uplink transmission needs to have a path loss adjustment amount superimposed on PL#2 determined by the first path loss reference signal.

[0217] Exemplarily, the configuration information of Alphaset may include field #1. Assuming that this field is "True," it indicates that if the transmit power parameter of the uplink transmission is determined by the alpha, the path loss corresponding to the uplink transmission is PL#1 among at least two path losses, or a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. Alternatively, if this field is "False," it indicates that if the transmit power parameter of the uplink transmission is determined by the alpha, the path loss corresponding to the uplink transmission is PL#1 among at least two path losses, or a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. For example, the path loss corresponding to the uplink transmission associated with the Alphaset is PL#1 among at least two path losses, or the path loss corresponding to the uplink transmission needs to have a path loss adjustment amount superimposed on PL#2 determined by the first path loss reference signal.

[0218] Exemplarily, the Uplink-powerControl configuration information may include Field #1. If this field is "True," it indicates that if the transmit power parameter for uplink transmission is determined by the Uplink-powerControl, the path loss corresponding to the uplink transmission is PL#1 among the at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. Alternatively, if this field is "False," it indicates that if the transmit power parameter for uplink transmission is determined by the Uplink-powerControl, the path loss corresponding to the uplink transmission is PL#1 among the at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. For example, the path loss corresponding to the uplink transmission associated with the Uplink-powerControl is PL#1 among the at least two path losses, or that the path loss corresponding to the uplink transmission needs to have a path loss adjustment amount superimposed on PL#2 determined by the first path loss reference signal.

[0219] In another possible implementation, for example, the network device may determine whether field #1 is included in TCI state configuration information, path loss reference signal configuration information, path loss correction factor configuration information, Uplink-powerControl configuration information, or AlPhaseT configuration information, thereby indicating to the terminal device which path loss (i.e., PL#1 or PL#2) of the at least two path losses the first path loss reference signal is used to determine, or indicating to the terminal device whether a path loss adjustment amount needs to be superimposed on PL#2 determined based on the first path loss reference signal. For example, if field #1 is not included in TCI state configuration information, path loss reference signal configuration information, path loss correction factor configuration information, Uplink-powerControl configuration information, or AlPhaseT configuration information, then the terminal device is instructed to determine PL#1 of the at least two path losses using the first path loss reference signal, or the terminal device is instructed to superimpose a path loss adjustment amount on PL#2 determined based on the first path loss reference signal. For another example, if field #1 is included in the TCI state configuration information, the path loss reference signal configuration information, the path loss correction factor configuration information, and the Uplink-powerControl configuration information, it indicates that the terminal device uses the first path loss reference signal to determine PL#1 among at least two path losses, or indicates that the terminal device needs to superimpose a path loss adjustment amount on PL#2 determined based on the first path loss reference signal.

[0220] In another possible implementation, for example, the network device may include a field (e.g., field #1) in the TCI state configuration information, the path loss reference signal configuration information, the path loss correction factor configuration information, the Uplink-powerControl configuration information, or the Alphaset configuration information, which is used to indicate the path loss index corresponding to the first path loss of at least two path losses corresponding to the first path loss reference signal.

[0221] Exemplarily, field #1 may be included in the TCI state configuration information. Field #1 is used to indicate that if uplink transmission adopts this TCI state, whether to adopt PL#1 or PL#2 may be determined based on the path loss index associated with field #1, or whether a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. For example, assuming that the path loss index associated with field #1 is index#1, the path loss corresponding to the uplink transmission is PL#1 among the at least two path losses, or a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. In this scenario, if the path loss index associated with field #1 is index#2, the path loss corresponding to the uplink transmission is PL#2 among the at least two path losses, or a path loss adjustment amount does not need to be superimposed on PL#2 determined by the first path loss reference signal. For another example, assuming that the path loss index associated with field #1 is index#1, the path loss corresponding to the uplink transmission is PL#2 among the at least two path losses, or it is not necessary to superimpose a path loss adjustment value on PL#2 determined based on the first path loss reference signal. In this scenario, if the path loss index associated with field #1 is index#2, the path loss corresponding to the uplink transmission is PL#1 among the at least two path losses, or it is necessary to superimpose a path loss adjustment value on PL#2 determined based on the first path loss reference signal.

[0222] Exemplarily, field #1 may be included in the configuration information of the path loss reference signal. Field #1 is used to indicate that if the uplink transmission uses the path loss reference signal as the first path loss reference signal, then PL#1 or PL#2 may be determined based on the path loss index associated with field #1, or whether a path loss adjustment amount needs to be superimposed on PL#2 determined based on the first path loss reference signal. For example, assuming that the path loss index associated with field #1 is index#1, then the path loss corresponding to the uplink transmission is PL#1 among the at least two path losses, or it is necessary to superimpose a path loss adjustment amount on PL#2 determined based on the first path loss reference signal. In this scenario, if the path loss index associated with field #1 is index#2, then the path loss corresponding to the uplink transmission is PL#2 among the at least two path losses, or it is not necessary to superimpose a path loss adjustment amount on PL#2 determined based on the first path loss reference signal. For another example, assuming that the path loss index associated with field #1 is index#1, the path loss corresponding to the uplink transmission is PL#2 among the at least two path losses, or it is not necessary to superimpose a path loss adjustment value on PL#2 determined based on the first path loss reference signal. In this scenario, if the path loss index associated with field #1 is index#2, the path loss corresponding to the uplink transmission is PL#1 among the at least two path losses, or it is necessary to superimpose a path loss adjustment value on PL#2 determined based on the first path loss reference signal.

[0223] The implementation of the remaining configuration information can also be understood by referring to the above two examples and will not be repeated here.

[0224] Method 3

[0225] The first information may be associated with the TCI state, or the first information may be associated with a path loss reference signal, a path loss correction factor, an Uplink-powerControl, or an AlPhaseT. Exemplarily, the first information may be in the form of a "field", for example, the first information may be field #2.

[0226] Exemplarily, the TCI state is associated with field #2. When the terminal device determines the TCI state for this uplink transmission, it can further determine the value of "Field #2" associated with the TCI state. Assuming that the value of this field is "0," it indicates that if the uplink transmission adopts this TCI state, the first path loss reference signal corresponding to this TCI state is used to determine PL#1 among the at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. Alternatively, if this field is "False," it indicates that if the uplink transmission adopts this TCI state, the first path loss reference signal corresponding to this TCI state is used to determine PL#1 among the at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined by the first path loss reference signal. For example, the path loss corresponding to the uplink transmission adopting this TCI state is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission needs to have a path loss adjustment amount superimposed on PL#2 determined by the first path loss reference signal.

[0227] Similarly, the specific implementation method when the path loss reference signal, or the path loss correction factor, or Uplink-powerControl, or Alphaset is associated with field #2 can also be understood by referring to the implementation method of associating the above-mentioned TCI state with field #2, and will not be repeated here.

[0228] Method 4

[0229] The first information is at least one of the following: MAC CE activation signaling for the TCI state for uplink transmission, DCI indication signaling for the TCI state for uplink transmission, scheduling signaling for scheduled uplink transmission, or configuration information for unscheduled uplink transmission. In this case, it can also be understood that the MAC CE activation signaling for the TCI state for uplink transmission, scheduling signaling for scheduled uplink transmission, and configuration information for unscheduled uplink transmission can be used to indicate whether the first path loss reference signal is used to determine a first path loss of at least two path losses, or to indicate whether a path loss adjustment amount needs to be superimposed on a second path loss determined based on the first path loss reference signal.

[0230] As previously mentioned, when determining the TCI state for uplink transmission, a terminal device typically needs to go through three stages: configuring the TCI state, activating the TCI state, and indicating the TCI state. Therefore, in one possible implementation, the MAC CE activation signaling for the TCI state, or the DCI indication signaling for the TCI state, may include a field (e.g., field #1) that indicates whether the first path loss reference signal is used to determine the first path loss of at least two path losses, or whether a path loss adjustment value needs to be superimposed on the second path loss determined based on the first path loss reference signal.

[0231] Exemplarily, the MAC CE activation signaling for the TCI state used for uplink transmission or the DCI indication signaling for the TCI state used for uplink transmission may include field #1. Assuming that this field is 1 bit and its value is "0", it indicates that: if the TCI state for uplink transmission is the TCI state in the MAC CE activation signaling or the TCI state in the DCI indication signaling, then the first path loss reference signal corresponding to the TCI state is used to determine PL#1 of at least two path losses, or it is necessary to superimpose a path loss adjustment amount on PL#2 determined based on the first path loss reference signal. Alternatively, if the value of this field is "1", it indicates that if the uplink transmission adopts the TCI state, then the first path loss reference signal corresponding to the TCI state is used to determine PL#1 of at least two path losses, or it is necessary to superimpose a path loss adjustment amount on PL#2 determined based on the first path loss reference signal. For example, the path loss corresponding to the uplink transmission using the TCI state is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission needs to superimpose a path loss adjustment value on PL#2 determined by the first path loss reference signal.

[0232] For example, in the scenario of dynamically scheduled uplink transmission (i.e., DCI-scheduled uplink transmission), the scheduling signaling (i.e., the DCI for scheduling the uplink transmission) may include field #1. The DCI-scheduled uplink transmission may include DCI-scheduled PUSCH transmission, DCI-activated configured grant (CG) Type 2 PUSCH transmission or retransmission, DCI-scheduled CG Type 1 PUSCH retransmission, DCI-activated SRS transmission, etc. The "scheduling signaling" is the DCI for scheduling PUSCH, or DCI for activating CG Type 2 PUSCH transmission or retransmission, or DCI for scheduling Type 1 PUSCH retransmission, or DCI for scheduling SRS transmission, or DCI for scheduling PRACH, etc. Assuming that the scheduling request signaling includes field #1, assuming that the value of this field is "0," it indicates that the first path loss reference signal corresponding to this uplink transmission is used to determine PL#1 of at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined based on the first path loss reference signal. In this scenario, a value of "1" in this field indicates that the first path loss reference signal corresponding to this uplink transmission is used to determine PL#2 among the at least two path losses, or that a path loss adjustment factor does not need to be added to PL#2 determined by the first path loss reference signal. Alternatively, a value of "1" in this field indicates that the first path loss reference signal corresponding to this uplink transmission is used to determine PL#1 among the at least two path losses, or that a path loss adjustment factor needs to be added to PL#2 determined by the first path loss reference signal. For example, the path loss corresponding to the uplink transmission scheduled by this DCI is PL#1 among the at least two path losses, or that a path loss adjustment factor needs to be added to PL#2 determined by the first path loss reference signal. In this scenario, a value of "0" in this field indicates that the first path loss reference signal corresponding to this uplink transmission is used to determine PL#2 among the at least two path losses, or that a path loss adjustment factor does not need to be added to PL#2 determined by the first path loss reference signal. For example, the path loss corresponding to the uplink transmission scheduled by the DCI is PL#2 among the at least two path losses, or there is no need to superimpose the path loss adjustment value on PL#2 determined according to the first path loss reference signal.

[0233] Exemplarily, the configuration information for a scheduling-free uplink transmission (e.g., Type 1 PUSCH or a scheduling request) may include Field #1. For example, the configuration information for the Type 1 PUSCH includes Field #1, or is associated with Field #1. Assuming that the value of this field is "0," it indicates that the first path loss reference signal corresponding to this uplink transmission is used to determine PL #1 among at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL #2 determined based on the first path loss reference signal. Alternatively, when the value of this field is "1," it indicates that the first path loss reference signal corresponding to this uplink transmission is used to determine PL #1 among at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL #2 determined based on the first path loss reference signal. For example, the path loss corresponding to the Type 1 PUSCH transmission is PL #1 among the at least two path losses, or that the path loss corresponding to the uplink transmission needs to have a path loss adjustment amount superimposed on PL #2 determined based on the first path loss reference signal.

[0234] Method 5

[0235] In one possible implementation, the first information includes an association between the second downlink control information and a first control resource pool index, where the first control resource pool index is used to determine a first path loss among at least two path losses. Specifically, the network device may configure the association, and the protocol may preset some default rules. For example, the rule may be that when the value of the coresetpoolindex corresponding to the DCI (an example of the second downlink control information) is a certain value, it indicates that the first path loss reference signal corresponding to the current uplink transmission is used to determine the first path loss among the at least two path losses, or whether a path loss adjustment amount needs to be superimposed on the second path loss determined based on the first path loss reference signal.

[0236] Exemplarily, the above implementation method can be applicable to the scenario of PUSCH (an example of uplink transmission), PUCCH (another example of uplink transmission) or SRS (another example of uplink transmission) scheduled by DCI (an example of second downlink control information) in the multi downlink control information (mDCI) multi transmission and receiving point (mTRP) scenario. Among them, when the network device configures the control resource set pool index (control-resource set pool index, CORESETPoolindex) #0 and CORESETPoolindex #1, or when the network device does not configure CORESETPoolIndex0 and only configures CORESETPoolIndex1, it can be considered that this is an m-DCI mTRP scenario.

[0237] Exemplarily, the rule may be that when the value of the coresetpoolindex corresponding to the DCI is 1, it indicates that the first path loss reference signal corresponding to the current uplink transmission (for example, PUSCH or PUCCH or SRS) is used to determine PL#1 of at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined according to the first path loss reference signal. Exemplarily, the rule may be that when the value of the coresetpoolindex corresponding to the DCI is 0, it indicates that the first path loss reference signal corresponding to the current uplink transmission is used to determine PL#1 of at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined according to the first path loss reference signal. For example, the path loss corresponding to the uplink transmission scheduled by the DCI is PL#1 of at least two path losses, or the path loss corresponding to the uplink transmission needs to superimpose a path loss adjustment amount on PL#2 determined by the first path loss reference signal.

[0238] Method 6

[0239] In one possible implementation, a network device may send first indication information to a terminal device, where the first indication information is used to indicate at least two transmission configuration indication states (TCI) states. Optionally, the first indication information may be DCI and is used to indicate the TCI state. The first information includes second indication information (e.g., RRC configuration information), where the second indication information is used to indicate one or two TCI states of the uplink transmission among the at least two TCI states, where the one or two TCI states of the uplink transmission are used to indicate that a first path loss reference signal is used to determine a first path loss among the at least two path losses, or is used to indicate whether a path loss adjustment amount needs to be superimposed on a second path loss determined based on the first path loss reference signal.

[0240] Illustratively, the second indication information is used to indicate that the TCI state of the uplink transmission is a first TCI state among at least two TCI states, where the first TCI state corresponds to PL#1. In this case, the second information indicates that the first path loss reference signal corresponding to the current uplink transmission is used to determine PL#1 among the at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined based on the first path loss reference signal. For example, the path loss corresponding to the uplink transmission using the first TCI state is PL#1 among the at least two path losses, or that the path loss corresponding to the uplink transmission needs to have a path loss adjustment amount superimposed on PL#2 determined based on the first path loss reference signal.

[0241] Exemplarily, the second indication information is used to indicate that the TCI state of the uplink transmission is a second TCI state among at least two TCI states, where the second TCI state corresponds to PL#1. In this case, the second information indicates that the first path loss reference signal corresponding to the current uplink transmission is used to determine PL#1 among the at least two path losses, or that a path loss adjustment amount needs to be superimposed on PL#2 determined based on the first path loss reference signal. For example, the path loss corresponding to the uplink transmission using the second TCI state is PL#1 among the at least two path losses, or that the path loss corresponding to the uplink transmission needs to have a path loss adjustment amount superimposed on PL#2 determined based on the first path loss reference signal.

[0242] Optionally, the above implementation method can be applicable to non-DCI scheduling or DCI scheduling PUSCH (an example of uplink transmission), PUCCH (another example of uplink transmission) or SRS (another example of uplink transmission) scenarios in m-DCI mTRP scenarios.

[0243] Optionally, the above implementation method can also be applied to scenarios where the uplink transmission in single downlink control information (sDCI) and multiple transmission and receiving point (mTRP) is PUCCH or type 1 configured grant (CG) PUSCH or SRS, or DCI-scheduled PUSCH, PUCCH or SRS. It should be understood that when the network device is only configured with CORESETPoolindex#0, or the network device is not configured with CORESETPoolindex, and each TCI Codepoint activated by the MAC CE or the TCI field indicated by the DCI corresponds to a pair of TCI states, it can be considered that this is an s-DCI m TRP scenario.

[0244] Method 7

[0245] In one possible implementation, the first information may include first downlink control information, the first downlink control information including a first field (e.g., field #3), the value of the first field being used to indicate whether a first path loss reference signal is used to determine a first path loss of at least two path losses, or the value of the first field being used to indicate whether a path loss adjustment amount needs to be superimposed on a second path loss determined based on the first path loss reference signal. The first downlink control information is used to schedule uplink transmission.

[0246] Exemplarily, the first field may be a sounding reference signal resource set indication (SRS resource set indicator) field in the DCI. Assuming that the field is 2 bits, when its value is "01", it indicates that: the corresponding first path loss reference signal of the uplink transmission is used to determine PL#1 of at least two path losses, or, it is necessary to superimpose a path loss adjustment amount on PL#2 determined based on the first path loss reference signal. When the value of the SRS resource set indicator is "10", it can be determined whether the adjustment amount needs to be superimposed based on the TCI state position activated by the MAC CE. It can also be understood that the uplink transmission configuration or DCI indication is a scenario of both TCI state at this time. The specific implementation can be understood with reference to the following method eight.

[0247] Optionally, this implementation is applicable to a scenario where a PUSCH (an example of uplink transmission) is scheduled by a DCI (an example of first downlink control information) in an sDCI mTRP scenario. For example, the path loss corresponding to the uplink transmission scheduled by the DCI is PL#1 among at least two path losses, or the path loss corresponding to the uplink transmission requires a path loss adjustment amount to be superimposed on PL#2 determined by the first path loss reference signal.

[0248] Method 8

[0249] In one possible implementation, the first path loss reference signal can be used to determine the first path loss of at least two path losses based on the TCI state position activated by the MAC CE, or to indicate whether a path loss adjustment amount needs to be superimposed on the second path loss determined based on the first path loss reference signal.

[0250] In one implementation, illustratively, the network device may send first indication information to the terminal device, where the first indication information is used to indicate at least two transmission configuration indication states TCI states. The first information includes second indication information (e.g., RRC configuration information), where the second indication information is used to indicate that the TCI state of the uplink transmission is F in the first MAC CE signaling in the at least two TCI states. i,2 Corresponding TCI state, F in the first MAC CE signaling i,2 The corresponding TCI state corresponds to the first path loss, or the second indication information is used to indicate that the TCI state of the uplink transmission in at least two TCI states is F in the first MAC CE signaling i,1 Corresponding TCI state, F in the first MAC CE signaling i,1The corresponding TCI state corresponds to the first path loss, as shown in (a) of Figure 7. For example, the path loss corresponding to the uplink transmission using this TCI state is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission requires superimposing a path loss adjustment value on PL#2 determined by the first path loss reference signal.

[0251] Exemplarily, the first indication information indicates two transmission configuration indication states TCI states, which are used for transmission with two network devices respectively. Typically, when the terminal device is configured in joint TCI mode and in the sDCI mTRP scenario, the two TCI states indicated by the first indication information are used for uplink and downlink transmission with the two network devices respectively.

[0252] For example, a codepoint of the first MAC CE signaling corresponds to at most two TCI states, F i,1 , F i,2 It can be used to indicate whether the first and second joint TCI states corresponding to the i-th codepoint in the first MAC CE signaling exist. i,1 The corresponding TCI state is the TCI state for uplink and downlink transmission with the first network device, F i,2 The corresponding TCI state is the TCI state for uplink and downlink transmission with the second network device.

[0253] In another implementation, the network device may send a first indication information to the terminal device, where the first indication information is used to indicate at least two transmission configuration indication states TCI states, and the first information includes second indication information (e.g., RRC configuration information), where the second indication information is used to indicate that the TCI state of the uplink transmission is S in the first MAC CE signaling in the at least two TCI states. i,2 Corresponding TCI state, S in the first MAC CE signaling i,2 The corresponding TCI state corresponds to the first path loss, or the second indication information is used to indicate that the TCI state of the uplink transmission is S in the first MAC CE signaling in at least two TCI states. i,1 Corresponding TCI state, S in the first MAC CE signaling i,1 The corresponding TCI state corresponds to the first path loss. For example, the path loss corresponding to the uplink transmission using this TCI state is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission requires a path loss adjustment value to be superimposed on PL#2 determined by the first path loss reference signal.

[0254] Exemplarily, the first indication information is used to indicate four TCI states (two DL TCI states and two UL TCI states), of which two TCI states (one UL TCI state and one DL TCI state) are respectively used for uplink and downlink transmission with the first network device, and the other two TCI states (one UL TCI state and one DL TCI state) are respectively used for uplink and downlink transmission with the second network device. Typically, when the terminal device is configured in separate TCI mode and is in the sDCI mTRP scenario, the four TCI states indicated by the first indication information are respectively used for uplink and downlink transmission with the two network devices.

[0255] For example, a codepoint of the first MAC CE signaling corresponds to at most four TCI states, F i,1 , F i,2 It can be used to indicate whether the first and second DL TCI states corresponding to the i-th codepoint in the first MAC CE signaling exist, S i,1 , S i,2 It can be used to indicate whether the first and second ULTCI states corresponding to the i-th codepoint in the first MAC CE signaling exist. i,1 The corresponding UL TCI state is the TCI state for uplink transmission with the first network device, S i,2 The corresponding UL TCI state is the TCI state for uplink transmission with the second network device, as shown in (b) in FIG. 7 .

[0256] Exemplarily, the above implementation is applicable to the s-DCI mTRP scenario, for the scenario where the uplink transmission configuration or DCI indication is both TCI state.

[0257] It should be understood that in implementing the above-mentioned methods 6 to 8, the network device may first send a first MAC CE signaling to the terminal device, where the first MAC CE is used to activate at least one TCI state, wherein the at least one activated TCI state includes the TCI state of the uplink transmission of the terminal device in the above-mentioned methods 6 to 8. For example, the at least one activated TCI state includes the first TCI state of the uplink transmission of the terminal device, or the at least one activated TCI state includes the second TCI state of the uplink transmission of the terminal device.

[0258] Method 9

[0259] The first information includes an association relationship between a TCI state and a timing advance group (TAG), or the first information includes an association relationship between a TCI state and a timing advance (TA). Specifically, the network device may configure two TAGs for the terminal device, and configure the TCI state to be associated with one of the two TAGs. Alternatively, the network device may configure two TAs for the terminal device, and configure the TCI state to be associated with one of the two TAs. The terminal device determines, based on the association relationship between the TCI state and the TAG or TA, which of the at least two path losses determined by the first path loss reference signal is used for uplink transmission using the TCI state, and the first path loss reference signal is associated with the TCI state.

[0260] Exemplarily, if the TCI state is associated with the first TAG of the two TAGs, then the path loss corresponding to the uplink transmission using the TCI state is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission needs to superimpose a path loss adjustment amount on PL#2 determined by the first path loss reference signal; if the TCI state is associated with the second TAG of the two TAGs, then the path loss corresponding to the uplink transmission using the TCI state is PL#2 among the at least two path losses, or the path loss corresponding to the uplink transmission does not need to superimpose a path loss adjustment amount on PL#2 determined by the first path loss reference signal. For another example, if the TCI state is associated with the first TAG of the two TAGs, then the path loss corresponding to the uplink transmission using this TCI state is PL#2 among the at least two path losses, or the path loss corresponding to the uplink transmission does not need to be superimposed with the path loss adjustment amount on PL#2 determined by the first path loss reference signal; if the TCI state is associated with the second TAG of the two TAGs, then the path loss corresponding to the uplink transmission using this TCI state is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission needs to be superimposed with the path loss adjustment amount on PL#2 determined by the first path loss reference signal. Conversely, illustratively, if the TCI state is associated with the first of the two TAs, then the path loss corresponding to the uplink transmission using this TCI state is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission needs to superimpose a path loss adjustment amount on PL#2 determined by the first path loss reference signal; if the TCI state is associated with the second of the two TAs, then the path loss corresponding to the uplink transmission using this TCI state is PL#2 among the at least two path losses, or the path loss corresponding to the uplink transmission does not need to superimpose a path loss adjustment amount on PL#2 determined by the first path loss reference signal. For another example, if the TCI state is associated with the first of the two TAs, then the path loss corresponding to the uplink transmission using this TCI state is PL#2 among the at least two path losses, or the path loss corresponding to the uplink transmission does not need to be superimposed with the path loss adjustment amount on PL#2 determined by the first path loss reference signal; if the TCI state is associated with the second of the two TAs, then the path loss corresponding to the uplink transmission using this TCI state is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission needs to be superimposed with the path loss adjustment amount on PL#2 determined by the first path loss reference signal.

[0261] In other words, taking the example of a network device configuring two TAGs for a terminal device, the terminal device determines which of the at least two path losses to use based on whether the first TAG or the second TAG of the two TAGs is used for uplink transmission. Exemplarily, the terminal device determines that the path loss reference signal for uplink transmission is the first path loss reference signal. If the TAG of the uplink transmission is the first TAG of the two TAGs, then the path loss corresponding to the uplink transmission is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission requires a path loss adjustment amount to be superimposed on PL#2 determined by the first path loss reference signal; if the TAG of the uplink transmission is the second TAG of the two TAGs, then the path loss corresponding to the uplink transmission is PL#2 among the at least two path losses, or the path loss corresponding to the uplink transmission does not require a path loss adjustment amount to be superimposed on PL#2 determined by the first path loss reference signal. Conversely, exemplarily, the terminal device determines that the path loss reference signal of the uplink transmission is the first path loss reference signal. If the TAG of the uplink transmission is the first TAG of the two TAGs, then the path loss corresponding to the uplink transmission is PL#2 among the at least two path losses, or the path loss corresponding to the uplink transmission does not need to be superimposed with the path loss adjustment amount on PL#2 determined by the first path loss reference signal; if the TAG of the uplink transmission is the second TAG of the two TAGs, then the path loss corresponding to the uplink transmission is PL#1 among the at least two path losses, or the path loss corresponding to the uplink transmission needs to be superimposed with the path loss adjustment amount on PL#2 determined by the first path loss reference signal.

[0262] When the network device configures two TAs for the terminal device, its implementation method can also be understood by referring to the above implementation method, and no further examples are given.

[0263] 620. The network device sends a first path loss reference signal.

[0264] Correspondingly, the terminal device receives the first path loss reference signal.

[0265] It should be noted that the present application does not limit the execution order of step 610 and step 620.

[0266] For example, the network device may send a downlink reference signal to the terminal device. The downlink reference signal may be an SSB or a CSI-RS. In this case, the downlink reference signal may be a first path loss reference signal, which is used for uplink transmission of the terminal device.

[0267] In a possible implementation, the network device may further send path loss information corresponding to the first path loss reference signal to the terminal device, and the path loss information is used by the terminal device to determine the first path loss.

[0268] Exemplarily, the path loss information may include at least one of the following: a path loss adjustment, a value corresponding to the first path loss, a power difference, and the power of the third uplink reference signal received by the network device. The path loss adjustment indicates the difference between the first and second path losses; the power difference indicates the difference between the power of the first and second uplink reference signals received by the network device. Therefore, the terminal device can specifically determine the value corresponding to the first path loss based on the path loss information.

[0269] 630. The terminal device determines a first path loss according to the first information and a first path loss reference signal, where the first path loss is used for uplink transmission.

[0270] In the present application, the terminal device can determine that the first path loss is used for this uplink transmission based on the first information. At this time, the terminal device can specifically determine the value of the first path loss based on the received first reference signal.

[0271] In the present application, when the terminal device determines to use PL#1 through the received first information (it can also be understood as when the first path loss is PL#1), at this time, optionally, 640 is also included, and the terminal device obtains the path loss information corresponding to the first path loss reference signal, and the path loss information is used to determine the first path loss.

[0272] Exemplarily, the path loss information may include at least one of the following: a path loss adjustment, a value corresponding to the first path loss, a power difference, and the power of the third uplink reference signal received by the network device. The path loss adjustment indicates the difference between the first and second path losses; the power difference indicates the difference between the power of the first and second uplink reference signals received by the network device. Therefore, the terminal device can specifically determine the value corresponding to the first path loss based on the path loss information.

[0273] In one possible implementation, the path loss information corresponding to the first path loss reference signal may be sent by a network device. For example. The network device may send an association relationship between the first path loss reference signal and the path loss information, and the association relationship may be configured through RRC signaling, or may be sent through MAC CE signaling or DCI signaling. The signaling may be carried on a physical downlink shared channel (PDSCH) or PDCCH. The signaling may carry one or more first downlink reference signal indexes (e.g., SSB index, CSI-RS index), and one or more path loss information, wherein the first downlink reference signal index corresponds one-to-one to the path loss information. In the present application, the first downlink reference signal may be understood as a first path loss reference signal.

[0274] In one possible implementation, the path loss information corresponding to the first path loss reference signal may be sent by a network device. For example, the network device may send an association between a TCI state and path loss information. This association may be configured through RRC signaling, or may be sent through MAC CE signaling or DCI signaling. The signaling may be carried on a PDSCH or a PDCCH. The signaling may carry one or more TCI state indexes, as well as one or more path loss information. At least one TCI state of the one or more TCI states is associated with the first path loss reference signal. Optionally, the TCI state index in the signaling corresponds one-to-one to the path loss information.

[0275] In another possible implementation, the terminal device may determine the path loss information corresponding to the first path loss reference signal by itself. It can also be understood that the path loss information is determined by the terminal device itself and does not need to be sent by the network device.

[0276] Optionally, the method further includes 650, where the terminal device determines the first path loss according to the first information and the path loss information corresponding to the first path loss reference signal.

[0277] Exemplarily, the terminal device receives the path loss information corresponding to the first path loss reference signal from the network device. Exemplarily, the path loss information corresponding to the first path loss reference signal can be determined by the terminal device itself without being sent by the network device.

[0278] In this application, the path loss information may include different information for the terminal device to determine PL#1. The following describes various implementation methods.

[0279] Method 1

[0280] The terminal device can first determine the value corresponding to the second path loss (i.e., PL#2) based on the existing formula for calculating path loss and the received first path loss reference signal. Assuming that the path loss information includes a path loss adjustment value ΔPL, the path loss adjustment value can be used to indicate the difference between the path loss value PL#1 of network device #1 and the path loss value PL#2 of network device #2 estimated by the terminal based on the first downlink reference signal (ΔPL = PL#1-PL#2 or ΔPL = PL#2-PL#1). For example, network device #2 sends the first downlink reference signal to the terminal device and configures the transmit power Pt#1 of the first downlink reference signal. The terminal device receives the first downlink reference signal and can measure the receive power Pr1 of the first downlink reference signal. It can estimate the path loss value PL#2 of network device #2 as Pt#1-Pr#1. Then, based on the path loss difference ΔPL, the terminal device can obtain the path loss value PL#1 of network device #1 as PL#2+ΔPL or PL#1 as PL#2-ΔPL. Subsequently, when the terminal device uses the first downlink reference signal as the path loss reference signal when sending data to the network device, the path loss value PL#1 is used to adjust the transmission power to the network device.

[0281] Method 2

[0282] The path loss information includes a value PL#1 corresponding to the first path loss. At this time, when the terminal device performs uplink transmission to the network device and the uplink transmission corresponds to the first path loss reference signal, the path loss value PL#1 is used to adjust the transmission power to the network device.

[0283] Method 3

[0284] The path loss information includes power difference information, which may include one of the following methods A and B:

[0285] Mode A: The power difference information is used to indicate the difference between power Pr#1 and power Pr#2;

[0286] Mode B: The power difference information is used to indicate the difference between the power Pr#2 and the power Pr#1;

[0287] Method A:

[0288] Assume that the transmission power of the first uplink reference signal sent by the terminal device can be recorded as Pt#1 (for example, the value of Pt#1 can refer to the calculation of Pt#1 in the previous text). SRS,b,f,c (i,q s,l) of formula (2), and after the first uplink reference signal is transmitted through the path between the terminal device and the first network device, the first network device can receive the first uplink reference signal. Wherein, the receiving power of the first uplink reference signal received by the first network device is Pr#1, and the following formula (4) can be obtained: Pr#1=Pt#1-PL#1 Formula (4)

[0289] Similarly, it is assumed that the transmission power of the second uplink reference signal sent by the terminal device can be recorded as Pt#2 (for example, the value of Pt#1 can refer to the above formula (1) P SRS,b,f,c (i,q s ,l) determination process), and after the second uplink reference signal is transmitted through the path between the terminal device and the second network device, the second network device is able to receive the second uplink reference signal. Wherein, the receiving power of the second uplink reference signal received by the second network device is Pr#2, and the following formula (5) can be obtained: Pr#2=Pt#2-PL#2 Formula (5)

[0290] Assume that after the first network device transmits a first path loss reference signal, the first path loss reference signal is transmitted along the path between the first network device and the terminal device, and the terminal device is able to receive the first path loss reference signal. Furthermore, the terminal device can determine PL#2 based on the aforementioned PL = referenceSignalPower - higher layer filtered RSRP.

[0291] Based on the above implementation process, different devices can determine some of the parameters included in the above formulas (4) and (5).

[0292] For example, for a terminal device, since the first uplink reference signal and the second uplink reference signal are both sent by the terminal device, the terminal device can clearly identify the values ​​of the parameters PL#2, Pt#1, and Pt#2.

[0293] For another example, for the first network device, since the first uplink reference signal is received by the first network device, the first network device can clearly determine the value of the parameter Pr#1.

[0294] For another example, for the second network device, since the second uplink reference signal is received by the second network device, the second network device can clearly determine the value of the parameter Pr#2.

[0295] Therefore, according to formula (4) and formula (5), formula (6) and formula (7) can be obtained: Pr#1-Pr#2=(Pt#1-PL#1)-(Pt#2-PL#2) Formula (6) Pr#2-Pr#1=(Pt#2-PL#2)-(Pt#1-PL#1) Formula (7)

[0296] Based on formula (6) and formula (7), the following formulas (8) and (9) can be obtained respectively: PL#1=-(Pr#1-Pr#2)-(Pt#2-PL#2)+Pt#1 Formula (8) PL#1=(Pr#2-Pr#1)-(Pt#2-PL#2)+Pt#1 Formula (9)

[0297] For the terminal device, based on formula (8), since the terminal device knows the values ​​of parameters PL#2, Pt#1, and Pt#2, the terminal device can determine the second path loss (PL#2) based on the value of (Pr#1-Pr#2). Based on the aforementioned method A, it can be seen that in method A, the power difference information included in the path loss information can indicate the difference between Pr#1 and Pr#2 (Pr1-Pr2). Therefore, when implementing method A, the terminal device can determine the path loss PL#1 based on the implementation of formula (8).

[0298] Similarly, for the terminal device, based on formula (9), since the terminal device knows the values ​​of parameters PL#2, Pt#1, and Pt#2, the terminal device can determine the path loss PL#2 based on the value of (Pr#2 - Pr#1). Based on the aforementioned method B, it can be seen that in method B, the power difference information included in the path loss information can indicate the difference between Pr#2 and Pr#1 (Pr2 - Pr1). Therefore, when implementing method B, the terminal device can determine PL#2 based on the implementation of formula (9).

[0299] It can be understood that in method A, when the power difference information contained in the path loss information is expressed as △P = (Pr#1-Pr#2), the difference △P indicated by the power difference information is the difference between Pr#1 and Pr#2. Accordingly, formula (8) can be transformed into PL#1 = △P-(Pt#2-PL#2)+Pt#1.

[0300] Optionally, if the transmission powers of the first uplink reference signal and the second uplink reference signal are the same, Pt2=Pt1 is satisfied. In this case, formula (8) can be transformed into PL#1=ΔP+PL#2.

[0301] It can be understood that in method B, when the power difference information contained in the path loss information is expressed as △P = (Pr#2-Pr#1), the power difference information indicates the difference △P between Pr#2 and Pr#1. Accordingly, formula (9) can be transformed into PL#2 = -△P-(Pt#2-PL#2)+Pt#1.

[0302] Optionally, if the transmission powers of the first uplink reference signal and the second uplink reference signal are the same, Pt#2=Pt#1 is satisfied. In this case, formula (9) can be transformed into PL#1=-ΔP+PL#2.

[0303] Method 3 can also be understood as the terminal device determining PL#1 based on the first information, PL#2, the power difference, the power Pt#1 for sending the first uplink reference signal, and the power Pt#2 for sending the second reference signal.

[0304] In one possible implementation, the communication parameters for sending the first path loss reference signal are the same as the communication parameters for receiving the first uplink reference signal, and / or the communication parameters for receiving the first path loss reference signal are the same as the communication parameters for sending the first uplink reference signal. Specifically, during the communication process between the terminal device and the second network device, the communication parameters for sending and receiving the downlink reference signal and the communication parameters for sending and receiving the first uplink reference signal can be the same or similar. In this way, the first reference signal and the first uplink reference signal can be transmitted through the same or similar transmission path as much as possible, thereby making the path loss determined by the terminal device based on the received downlink reference signal the same or similar to the path loss determined by the second network device based on the received first uplink reference signal. In other words, it is to ensure that the path loss "PL = referenceSignalPower-higher layer filtered RSRP" of the downlink reference signal estimated by the terminal side is equal to the path loss PL#1 = Pt#1-Pr#1 experienced by the first uplink reference signal.

[0305] In the above-mentioned methods A and B, it can be understood that the power difference information can be a "power difference value," where Pt#2 represents the transmit power of the second uplink reference signal, Pt#1 represents the transmit power of the first uplink reference signal, and ΔP represents the difference value indicated by the power difference information. The following describes each of the above-mentioned implementation methods.

[0306] Optionally, the above implementation method can be replaced by the terminal device expecting (or determining) that the communication parameters for sending the downlink reference signal are the same as the communication parameters for receiving the first uplink reference signal, and / or the terminal device expects (or determines) that the communication parameters for receiving the downlink reference signal are the same as the communication parameters for sending the first uplink reference signal.

[0307] Optionally, the communication parameters include at least one of the following: beam, analog beam, uplink spatial filter, spatial reception parameter, spatial filter, spatial relationship, digital beam, digital precoding, number of antenna ports, number of digital ports.

[0308] For example, the first uplink reference signal received by the second network device and the downlink reference signal sent by the second network device have the same analog beam / spatial filter / spatial relationship. This example can be understood as that the terminal device expects the first uplink reference signal received by the second network device and the downlink reference signal sent by the second network device to have the same spatial filter, or the terminal device expects the first uplink reference signal and the downlink reference signal to satisfy the QCL type D relationship with the same reference signal, or the terminal device expects the first uplink reference signal and the downlink reference signal to satisfy the QCL type D relationship.

[0309] For another example, the first uplink reference signal received by the second network device and the downlink reference signal sent by the second network device have the same digital beam / digital precoding. This example can be understood as the terminal device expecting the first uplink reference signal received by the second network device and the downlink reference signal sent by the second network device to have the same digital beam / digital precoding.

[0310] For another example, the first uplink reference signal sent by the terminal device and the downlink reference signal received by the terminal device have the same analog beam / spatial filter / spatial relationship. This example can be understood as that the uplink spatial domain filter of the first uplink reference signal sent by the terminal device refers to the downlink reference signal, or the uplink spatial domain filter of the first uplink reference signal sent by the terminal device and the downlink reference signal satisfy the QCL type D relationship, or the uplink spatial domain filter of the first uplink reference signal sent by the terminal device and the spatial domain reception parameter of the downlink reference signal received by the terminal device refer to the same reference signal.

[0311] For another example, the first uplink reference signal sent by the terminal device and the downlink reference signal received by the terminal device have the same digital beam / digital precoding.

[0312] Method 4

[0313] The path loss information includes the power Pr#3 of the third uplink reference signal received by the network device. For example, the terminal device sends the third uplink reference signal to network device #1 at Pt#3, and network device #1 receives the power Pr#3 of the second uplink reference signal. The terminal device obtains the path loss value PL#1 transmitted to network device #1 = Pt#3-Pr#3. When the terminal device performs an uplink transmission to network device #1 corresponding to the first path loss reference signal, the path loss value PL#1 is used to adjust the transmission power to network device #1. This implementation method can also be understood as the terminal device determining the first path loss (in this case, the first path loss can be understood as PL#1) based on the first information, the power of the third uplink reference signal sent by the terminal device, and the power of the third uplink reference signal received by the network device.

[0314] Based on the above technical solution, in the present application, the terminal device can determine the path loss used for this uplink transmission from at least two path losses based on the first information, and determine the value of the path loss based on the received first path loss reference signal, and adjust the transmission power of the uplink transmission based on the determined path loss, thereby ensuring the performance of the uplink transmission.

[0315] It should be noted that "A corresponds to B" in this application can be understood as "there is a corresponding relationship between A and B", "there is an association relationship between A and B", and "there is a mapping relationship between A and B". Alternatively, the "association relationship" in this application can also be expressed as "mapping relationship" or "corresponding relationship". It should be understood that the "association relationship" mentioned in the embodiments of this application can be saved or recorded through functional relationships, tables, or mapping relationships. The "association relationship" mentioned in this application can be configured by network equipment, or predefined by the protocol, etc., and is not limited.

[0316] "Configuration" in this application refers to the process by which a network device such as a base station or server sends configuration information or parameter values ​​of some parameters to a terminal through messages or signaling, so that the terminal can determine the communication parameters or resources during transmission based on these values ​​or information. "Pre-configuration" is similar to "configuration". It can be a method by which a network device such as a base station or server sends parameter information or values ​​to a terminal through a communication link or carrier; it can also be a method by which a definition of corresponding parameters or parameter values ​​is given in a standard, or by setting the relevant parameters or values ​​in the terminal device in advance. This application does not limit this. Furthermore, these values ​​and parameters can be changed or updated.

[0317] In this application, "used for indication" can include direct indication and indirect indication. When describing that a certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0318] In this application, the information indicated by the indication information is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, it can be implemented by direct indication, such as by indicating the information to be indicated itself or the index of the information to be indicated. It can also be implemented by indirectly indicating other information, wherein there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can also be achieved with the help of the arrangement order of each information agreed in advance (for example, stipulated in the protocol), thereby reducing the indication overhead to a certain extent.

[0319] The information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in this application. The sending period and / or sending time of these sub-information can be predefined, for example, predefined according to a protocol, or configured by the transmitting device by sending configuration information to the receiving device. The configuration information can include, for example, but not limited to, one or a combination of at least two of RRC signaling, MAC signaling, and physical layer signaling. The MAC layer signaling includes, for example, MAC CE; the physical layer signaling includes, for example, DCI.

[0320] "Sending" and "receiving" in the embodiments of the present application indicate the direction of signal transmission. For example, "sending information to device X" can be understood as the destination of the information being device X, which can include direct sending through the air interface, as well as indirect sending through the air interface by other units or modules. "Receiving information from device Y" can be understood as the source of the information being device Y, which can include direct receiving from device Y through the air interface, as well as indirect receiving from device Y through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface.

[0321] For example, let's take the communication process between entity A and entity B as an example. In this application, when entity A sends information to entity B, it can be A sending it directly to B, or A sending it to B indirectly through another entity. Similarly, when entity B receives information from entity A, it can be entity B receiving the information sent by entity A directly, or entity B receiving the information sent by entity A indirectly through another entity. Entities A and B here can be RAN nodes or terminals, or modules within a RAN node or terminal. The sending and receiving of information can be information exchange between a RAN node and a terminal, for example, information exchange between a base station and a terminal; the sending and receiving of information can also be information exchange between two RAN nodes, for example, information exchange between a CU and a distributed unit DU; the sending and receiving of information can also be information exchange between different modules within a device, for example, information exchange between a terminal chip and other modules of the terminal, or information exchange between a base station chip and other modules in the base station.

[0322] It should be understood that the examples in method 600 in the embodiments of the present application are merely intended to facilitate understanding of the embodiments of the present application by those skilled in the art, and are not intended to limit the embodiments of the present application to the specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or variations based on the examples in method 600, and such modifications or variations also fall within the scope of the embodiments of the present application.

[0323] It can also be understood that some optional features in the various embodiments of the present application may not depend on other features in certain scenarios, and may also be combined with other features in certain scenarios, without limitation.

[0324] It is also understood that the various embodiments described in this application may be independent solutions or combined according to internal logic, and all of these solutions fall within the scope of protection of this application. In addition, the explanations or descriptions of various terms appearing in the embodiments may refer to or explain each other in the various embodiments, without limitation.

[0325] It can be understood that in this application, "under the circumstances of...", "if" and "if" all mean that the device will take corresponding actions under certain objective circumstances, and do not limit the time. It does not require that the device must perform judgment actions when it is implemented, nor does it mean that there are other limitations.

[0326] It should be understood that the term "and / or" in this document simply describes an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0327] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between each node. It is understandable that each node, such as a terminal device, a network device, includes a hardware structure and / or software module corresponding to the execution of each function in order to implement the above functions. Those skilled in the art should be aware that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0328] In the embodiment of the present application, the terminal device and the network device can be divided into functional modules according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The following is an example of dividing each functional module according to each function.

[0329] FIG8 is a schematic block diagram of a communication device 100 according to an embodiment of the present application. As shown in the figure, the device 100 may include a transceiver unit 110 and a processing unit 120.

[0330] The communication device 100 may be a terminal-side device in the above-described embodiment, for example, a terminal or a communication module in the terminal, or a circuit or chip in the terminal responsible for communication functions. In one possible design, the device 100 may be a terminal device in the above-described method embodiment, or a chip for implementing the functions of the terminal device in the above-described method embodiment. It should be understood that the device 100 may correspond to the terminal device in the method 600 according to the embodiment of the present application, and the device 100 may perform the steps corresponding to the terminal device in the method 600 according to the embodiment of the present application.

[0331] In one possible implementation, a transceiver unit is configured to receive first information, where the first information is configured to indicate that a first path loss reference signal is used to determine a first path loss among at least two path losses; the transceiver unit is further configured to receive a first reference signal; and a processing unit is configured to determine the first path loss based on the first information and the first path loss reference signal, wherein the first path loss is used for uplink transmission.

[0332] In a possible implementation manner, the transceiver unit is further configured to receive first indication information, where the first indication information is used to indicate at least two transmission configuration indication states TCI states.

[0333] In a possible implementation, the transceiver unit is further used to receive a first medium access control element MAC CE signaling, where the first MAC CE is used to activate at least one TCI state, wherein the at least one activated TCI state includes a TCI state for uplink transmission of the terminal device.

[0334] In one possible implementation, the processing unit is further configured to obtain path loss information corresponding to the first path loss reference signal, where the path loss information is used to determine the first path loss; and determining the first path loss based on the first information and the first path loss reference signal includes: determining the first path loss based on the first information, the first path loss reference signal, and the path loss information.

[0335] In one possible design, when the communication device 100 is a terminal or a communication module in a terminal, the functions of the processing unit 120 may be implemented by one or more processors. Specifically, the processor may include a modem chip, or a system-on-chip (SoC) chip or a SIP chip including a modem core.

[0336] In one possible design, when the communication device 100 is a circuit or chip responsible for communication functions in a terminal, such as a modem chip or a system-on-chip (SoC) chip or a SIP chip including a modem core, the function of the processing unit 120 can be implemented by a circuit system including one or more processors or processor cores in the above chip.

[0337] In one possible design, the apparatus 100 may be the network device in the above method embodiment, or may be a chip for implementing the functions of the terminal device in the above method embodiment. It should be understood that the apparatus 100 may correspond to the network device in method 600 according to an embodiment of the present application, and the apparatus 100 may perform the steps corresponding to the network device in method 600 according to an embodiment of the present application.

[0338] In a possible implementation, the transceiver unit is configured to send the first information, and the transceiver unit is further configured to send a first path loss reference signal.

[0339] In a possible implementation manner, the transceiver unit is configured to send the first indication information.

[0340] In a possible implementation manner, the transceiver unit is configured to send the first MAC CE signaling.

[0341] In a possible implementation, the transceiver unit is configured to send path loss information corresponding to the first path loss reference signal.

[0342] It should also be understood that the device 100 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the device 100 may be specifically a terminal device or a network device in the above-mentioned embodiment, and may be used to execute the various processes and / or steps corresponding to the terminal device in the above-mentioned method embodiments. To avoid repetition, they will not be described here.

[0343] The apparatus 100 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the terminal device or network device in the above-mentioned method. The functions can be implemented by hardware, or the corresponding software can be implemented by hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the sending and receiving operations and related processing operations in each method embodiment.

[0344] In addition, the transceiver unit 110 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing unit may be a processing circuit.

[0345] It should be noted that the device in FIG8 can be a terminal device or network device in the aforementioned embodiment, or a chip or chip system, such as a system on a chip (SoC). The transceiver unit can be an input / output circuit or a communication interface; the processing unit can be a processor, microprocessor, or integrated circuit integrated on the chip. This is not limited here.

[0346] Figure 9 is a schematic block diagram of a communication device 200 provided in an embodiment of the present application. As shown in the figure, the device 200 includes: at least one processor 220. The processor 220 is coupled to a memory and is configured to execute computer programs or instructions stored in the memory to send and / or receive signals. Optionally, the device 200 also includes a memory 230 for storing computer programs or instructions. Optionally, the device 200 also includes a transceiver 210, and the processor 220 controls the transceiver 210 to send and / or receive signals.

[0347] It should be understood that the processor 220 and memory 230 may be combined into one processing device, and the processor 220 is used to execute the program code stored in the memory 230 to implement the above functions. In specific implementations, the memory 230 may also be integrated into the processor 220 or independent of the processor 220.

[0348] It should also be understood that the transceiver 210 may include a transceiver (or receiver) and a transmitter (or transmitter). The transceiver may further include an antenna, and the number of antennas may be one or more. The transceiver 210 may also be a communication interface or interface circuit.

[0349] Specifically, the transceiver 210 in the device 200 may correspond to the transceiver unit 110 in the device 100 , and the processor 220 in the device 200 may correspond to the processing unit 120 in the device 200 .

[0350] As a solution, the apparatus 200 is used to implement the operations performed by the terminal device in each of the above method embodiments.

[0351] For example, the processor 220 is configured to execute the computer program or instructions stored in the memory 230 to implement the relevant operations of the wireless access network device in the above various method embodiments. For example, the method performed by the terminal device in any of the embodiments shown in method 600.

[0352] As another solution, the apparatus 200 is used to implement the operations performed by the network device in the above various method embodiments.

[0353] For example, the processor 220 is configured to execute computer programs or instructions stored in the memory 230 to implement the relevant operations of the network device in the above various method embodiments, such as the method performed by the network device in any of the embodiments shown in method 600.

[0354] It should be understood that the specific process of each transceiver and processor executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0355] During implementation, each step of the above method can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0356] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or by software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above method.

[0357] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous-link DRAM (SLDRAM), and direct RAM-bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0358] According to the method provided in the embodiments of the present application, the present application also provides a computer program product having computer program code stored thereon. When the computer program code runs on a computer, the computer executes the method executed by a terminal device or a network device in any one of the embodiments of method 600.

[0359] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores program code. When the program code runs on a computer, the computer executes the method performed by the terminal device or network device in the above embodiment.

[0360] According to the method provided in the embodiment of the present application, the present application further provides a communication system, which includes a terminal device and a network device. The terminal device is used to perform the steps corresponding to the terminal device in the above method 600, and the network device is used to perform the steps corresponding to the network device in the above method 600.

[0361] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0362] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disc (SSD)).

[0363] In each of the above-mentioned device embodiments, the corresponding modules or units perform the corresponding steps. For example, the transceiver unit (transceiver) performs the receiving or sending steps in the method embodiments, and other steps except sending and receiving can be performed by the processing unit (processor). The functions of the specific units can be referred to in the corresponding method embodiments. There can be one or more processors.

[0364] As used in this specification, the terms "component," "module," "system," and the like are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. By way of illustration, both an application running on a computing device and a computing device can be a component. One or more components can reside in a process and / or an execution thread, and a component can be located on a computer and / or distributed between two or more computers. In addition, these components can be executed from various computer-readable media having various data structures stored thereon. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component on a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0365] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0366] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described systems, devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0367] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0368] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0369] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0370] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0371] It should be understood that references to "embodiments" throughout this specification mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, various embodiments throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0372] It should also be understood that the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects and are not used to limit the size, content, order, timing, priority, or importance of the multiple objects. For example, the first PDSCH and the second PDSCH can be the same physical channel or different physical channels, and such names do not indicate a difference in the amount of information, content, priority, or importance of the two physical channels.

[0373] It should also be understood that, in this application, "at least one" means one or more, and "plurality" means two or more. "At least one item" or similar expressions refers to one or more items, that is, any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c means: a, b, c, a and b, a and c, b and c, or a, b, and c.

[0374] It should also be understood that in each embodiment of the present application, "A corresponds to B" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B based solely on A, and B can also be determined based on A and / or other information.

[0375] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for determining path loss, characterized in that: include: receiving first downlink control information, where the first downlink control information is used to schedule physical random access channel transmission, and the first downlink control information indicates a first path loss reference signal used to determine one of at least two path losses, where the path loss is used for the physical random access channel transmission; receiving the first path loss reference signal; One of the at least two path losses is determined according to the first downlink control information and the first path loss reference signal.

2. The method according to claim 1, characterized in that The at least two path losses include a first path loss and a second path loss, the first downlink control information includes a first field, The first field is used to indicate whether the path loss transmitted by the physical random access channel is the first path loss or the second path loss, or; The first field is used to indicate whether the path loss transmitted by the physical random access channel needs to be superimposed with a path loss adjustment amount on the second path loss, wherein the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss.

3. The method according to claim 1 or 2, characterized in that The at least two path losses include a first path loss and a second path loss, and the first downlink control information includes a first field. The value of the first field is "1", indicating that the path loss transmitted by the physical random access channel is the first path loss, or indicating that the path loss transmitted by the physical random access channel requires a path loss adjustment amount to be superimposed on the second path loss, wherein the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss.

4. The method according to any one of claims 1 to 3, characterized in that The at least two path losses include a first path loss and a second path loss, and the first downlink control information includes a first field. The value of the first field is "0", indicating that the path loss transmitted by the physical random access channel is the second path loss, or indicating that the path loss transmitted by the physical random access channel does not require a path loss adjustment amount to be superimposed on the second path loss, wherein the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss.

5. The method according to any one of claims 1 to 4, characterized in that When the first field indicates that the path loss transmitted by the physical random access channel is the first path loss, or indicates that the path loss transmitted by the physical random access channel requires superimposing a path loss adjustment amount on the second path loss, determining one of the at least two path losses according to the first downlink control information and the first path loss reference signal includes: Determining a second path loss based on the first path loss reference signal, where the second path loss is determined based on transmit power and receive power of the first path loss reference signal, where the transmit power is a power configured by a network device for transmitting the first path loss reference signal, and the receive power is a receive power of a terminal device for receiving the first path loss reference signal; receiving a path loss adjustment value, where the path loss adjustment value indicates a difference between the first path loss and the second path loss; The first path loss is determined according to the second path loss and the path loss adjustment amount.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: receiving first configuration information, where the first configuration information is used to configure an association between a first transmission configuration indication state (TCI state) and the path loss adjustment amount, where the first TCI state is associated with the first path loss reference signal, and the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss; According to the first configuration information, it is determined that the path loss transmitted by the physical random access channel is the first path loss, or it is determined that the path loss transmitted by the physical random access channel requires the path loss adjustment amount to be superimposed on the second path loss.

7. The method according to any one of claims 1 to 6, characterized in that The first field is 1 bit.

8. A method for determining path loss, characterized in that: include: Sending first downlink control information, where the first downlink control information is used to schedule physical random access channel transmission, and the first downlink control information indicates a first path loss reference signal used to determine one of at least two path losses, where the path loss is used for the physical random access channel transmission; Send the first path loss reference signal.

9. The method according to claim 8, characterized in that The at least two path losses include a first path loss and a second path loss, the first downlink control information includes a first field, The first field is used to indicate whether the path loss transmitted by the physical random access channel is the first path loss or the second path loss, or; The first field is used to indicate whether the path loss transmitted by the physical random access channel needs to be superimposed with a path loss adjustment amount on the second path loss, wherein the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss.

10. The method according to claim 8 or 9, characterized in that The at least two path losses include a first path loss and a second path loss, and the first downlink control information includes a first field. The value of the first field is "1", indicating that the path loss transmitted by the physical random access channel is the first path loss, or indicating that the path loss transmitted by the physical random access channel requires a path loss adjustment amount to be superimposed on the second path loss, wherein the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss.

11. The method according to any one of claims 8 to 10, characterized in that The at least two path losses include a first path loss and a second path loss, and the first downlink control information includes a first field. The value of the first field is "0", indicating that the path loss transmitted by the physical random access channel is the second path loss, or indicating that the path loss transmitted by the physical random access channel does not require a path loss adjustment amount to be superimposed on the second path loss, wherein the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss.

12. The method according to any one of claims 8 to 11, characterized in that The method further comprises: Sending a path loss adjustment amount, where the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss; When the first field indicates that the path loss transmitted by the physical random access channel is the first path loss, or indicates that the path loss transmitted by the physical random access channel is such that the path loss adjustment amount needs to be superimposed on the second path loss, the first path loss is determined based on the second path loss and the path loss adjustment amount, and the second path loss is determined based on the transmit power and receive power of the first path loss reference signal, wherein the transmit power is the power configured by the network device for sending the first path loss reference signal, and the receive power is the receive power of the terminal device for receiving the first path loss reference signal.

13. The method according to any one of claims 8 to 12, characterized in that The method further comprises: Sending first configuration information, where the first configuration information is used to configure an association between a first transmission configuration indication state (TCI state) and a path loss adjustment amount, where the first TCI state is associated with the first path loss reference signal, where the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss.

14. The method according to any one of claims 8 to 13, characterized in that The first field is 1 bit.

15. A method for determining path loss, characterized in that: include: receiving first information indicating that a first path loss reference signal is used to determine a first path loss among at least two path losses; receiving the first path loss reference signal; The first path loss is determined according to the first information and the first path loss reference signal, wherein the first path loss is used for uplink transmission.

16. The method according to claim 15, characterized in that The first information includes an association relationship between a transmission configuration indication state TCI state corresponding to the uplink transmission and a first path loss correction factor among at least two path loss correction factors, wherein the TCI state corresponds to the first path loss reference signal, the at least two path loss correction factors correspond one-to-one to the at least two path losses, and the first path loss correction factor corresponds to the first path loss.

17. The method according to claim 15, characterized in that The first information is at least one of the following: Configuration information of the transmission configuration indication state TCI state for the uplink transmission, configuration information of the path loss reference signal, configuration information of the path loss correction factor set for the uplink transmission, and configuration information of the uplink power control parameters for the uplink transmission.

18. The method according to claim 15, characterized in that The first information includes first downlink control information, the first downlink control information includes a first field, the value of the first field is used to indicate that the first path loss reference signal is used to determine the first path loss among at least two path losses, wherein the first downlink control information is used to schedule the uplink transmission.

19. The method according to claim 18, characterized in that The first field is a sounding reference signal resource set indication SRS resource set indicator field.

20. The method according to claim 15, wherein The first information includes an association relationship between second downlink control information and a first control resource pool index, wherein the first control resource pool index is used to determine a first path loss among the at least two path losses, and the first downlink control information is used to schedule the uplink transmission.

21. The method according to claim 15, characterized in that The method further comprises: receiving first indication information, where the first indication information is used to indicate at least two transmission configuration indication states TCI states; The first information includes second indication information, where the second indication information is used to indicate one TCI state or two TCI states of the uplink transmission among the at least two TCI states, and the one TCI state or two TCI states of the uplink transmission are used to indicate that the first path loss reference signal is used to determine the first path loss among the at least two path losses.

22. The method according to claim 21, characterized in that The second indication information is used to indicate that the TCI state of the uplink transmission is a first TCI state among the at least two TCI states, and the first TCI state corresponds to the first path loss, or; The second indication information is used to indicate that the TCI state of the uplink transmission is a second TCI state among the at least two TCI states, and the second TCI state corresponds to the first path loss.

23. The method according to claim 21 or 22, characterized in that The method further comprises: A first medium access control element MAC CE signaling is received, where the first MAC CE is used to activate at least one TCI state, wherein the at least one activated TCI state includes the TCI state of the uplink transmission of the terminal device.

24. The method according to claim 23, wherein The second indication information is used to indicate that the TCI state of the uplink transmission is F in the first MAC CE signaling in the at least two TCI states. i,2 Corresponding TCI state, F in the first MAC CE signaling i,2 The corresponding TCI state corresponds to the first path loss, or; The second indication information is used to indicate that the TCI state of the uplink transmission is F in the first MAC CE signaling in the at least two TCI states. i,1 Corresponding TCI state, F in the first MAC CE signaling i,1 The corresponding TCI state corresponds to the first path loss.

25. The method according to claim 23, characterized in that The second indication information is used to indicate that the TCI state of the uplink transmission is S in the first MAC CE signaling in the at least two TCI states. i,2 Corresponding TCI state, S in the first MAC CE signaling i,2 The corresponding TCI state corresponds to the first path loss, or; The second indication information is used to indicate that the TCI state of the uplink transmission is S in the first MAC CE signaling in the at least two TCI states. i,1 Corresponding TCI state, S in the first MAC CE signaling i,1 The corresponding TCI state corresponds to the first path loss.

26. The method according to any one of claims 15 to 25, characterized in that The method further comprises: Acquire path loss information corresponding to the first path loss reference signal, where the path loss information is used to determine the first path loss; The determining the first path loss according to the first information and the first path loss reference signal includes: The first path loss is determined according to the first information, the first path loss reference signal, and the path loss information.

27. The method according to any one of claims 15 to 26, characterized in that The at least two path losses also include a second path loss, which is determined by the terminal device based on the transmit power and receive power of the first path loss reference signal, wherein the transmit power is the power configured by the network device to send the first path loss reference signal, and the receive power is the receive power of the terminal device to receive the first path loss reference signal.

28. The method according to claim 27, characterized in that The path loss information includes a path loss adjustment amount, wherein the path loss adjustment amount is used to indicate a difference between the first path loss and the second path loss. The determining the first path loss according to the first information, the first path loss reference signal, and the path loss information includes: determining the second path loss according to the first path loss reference signal; The first path loss is determined according to the first information, the second path loss, and the path loss adjustment amount.

29. The method according to claim 26, wherein The path loss information includes the first path loss.

30. A method for determining path loss, characterized in that: include: Sending first information, where the first information is used to indicate that a first path loss reference signal is used to determine a first path loss among at least two path losses, wherein the first path loss is used for uplink transmission; Sending the first impairment reference signal.

31. The method according to claim 30, wherein The first information includes an association relationship between a transmission configuration indication state TCI state corresponding to the uplink transmission and a first path loss correction factor among at least two path loss correction factors, wherein the TCI state corresponds to the first path loss reference signal, the at least two path loss correction factors correspond one-to-one to the at least two path losses, and the first path loss correction factor corresponds to the first path loss.

32. The method according to claim 30, wherein The first information is at least one of the following: Configuration information of the transmission configuration indication state TCI state for the uplink transmission, configuration information of the path loss reference signal, configuration information of the path loss correction factor set for the uplink transmission, and configuration information of the uplink power control parameters for the uplink transmission.

33. The method according to claim 30, wherein The first information includes first downlink control information, the first downlink control information includes a first field, the value of the first field is used to indicate that the first path loss reference signal is used to determine the first path loss among at least two path losses, wherein the first downlink control information is used to schedule the uplink transmission.

34. The method according to claim 33, wherein The first field is a sounding reference signal resource set indication SRS resource set indicator field.

35. The method according to claim 30, wherein The first information includes an association relationship between second downlink control information and a first control resource pool index, wherein the first control resource pool index is used to determine a first path loss among the at least two path losses, and the first downlink control information is used to schedule the uplink transmission.

36. The method according to claim 30, wherein The method further comprises: Sending first indication information, where the first indication information is used to indicate at least two transmission configuration indication states TCI state; The first information includes second indication information, where the second indication information is used to indicate one TCI state or two TCI states of the uplink transmission among the at least two TCI states, and the first path loss reference signal indicated by the one TCI state or the two TCI states of the uplink transmission is used to determine the first path loss among the at least two path losses.

37. The method according to claim 36, wherein The second indication information is used to indicate that the TCI state of the uplink transmission is a first TCI state among the at least two TCI states, where the first TCI state corresponds to the first path loss reference signal, or; The second indication information is used to indicate that the TCI state of the uplink transmission is a second TCI state among the at least two TCI states, where the second TCI state corresponds to the first path loss reference signal.

38. The method according to claim 36 or 37, characterized in that The method further comprises: A first medium access control element MAC CE signaling is sent, where the first MAC CE is used to activate at least one TCI state, wherein the at least one activated TCI state includes the TCI state of the uplink transmission of the terminal device.

39. The method according to claim 38, characterized in that The second indication information is used to indicate that the TCI state of the uplink transmission is F in the first MAC CE signaling in the at least two TCI states. i,2 Corresponding TCI state, F in the first MAC CE signaling i,2 The corresponding TCI state corresponds to the first path loss, or; The second indication information is used to indicate that the TCI state of the uplink transmission is F in the first MAC CE signaling in the at least two TCI states. i,1 Corresponding TCI state, F in the first MAC CE signaling i,1 The corresponding TCI state corresponds to the first path loss.

40. The method according to claim 38, wherein The second indication information is used to indicate that the TCI state of the uplink transmission is S in the first MAC CE signaling in the at least two TCI states. i,2 Corresponding TCI state, S in the first MAC CE signaling i,2 The corresponding TCI state corresponds to the first path loss, or; The second indication information is used to indicate that the TCI state of the uplink transmission is S in the first MAC CE signaling in the at least two TCI states. i,1 Corresponding TCI state, S in the first MAC CE signaling i,1 The corresponding TCI state corresponds to the first path loss.

41. The method according to any one of claims 30 to 40, characterized in that The method further comprises: Path loss information corresponding to the first path loss reference signal is sent, where the path loss information is used to determine the first path loss.

42. The method according to any one of claims 30 to 41, characterized in that The at least two path losses also include a second path loss, which is determined by the terminal device based on the transmit power and receive power of the first path loss reference signal, wherein the transmit power is the power configured by the network device to send the first path loss reference signal, and the receive power is the receive power of the terminal device to receive the first path loss reference signal.

43. The method according to claim 42, characterized in that The path loss information includes a path loss adjustment value, wherein the path loss adjustment value is used to indicate a difference between the first path loss and the second path loss.

44. The method according to claim 41, wherein The path loss information includes the first path loss.

45. A communication device, characterized in that Used to implement the method according to any one of claims 1 to 7, or used to implement the method according to any one of claims 15 to 29.

46. The communication device according to claim 45, characterized in that The communication device includes any one of the following: a terminal device or a chip.

47. A communication device, characterized in that Used to implement the method according to any one of claims 8 to 14, or used to implement the method according to any one of claims 30 to 44.

48. The communication device according to claim 47, characterized in that The communication device includes any one of the following: a network device or chip, a central unit CU or a distributed unit DU.

49. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program or instructions, which, when executed, implements the method according to any one of claims 1 to 7, or the method according to any one of claims 8 to 14, or the method according to any one of claims 15 to 29, or the method according to any one of claims 30 to 44.

50. A computer program product, characterized in that When the computer program product is executed, the method according to any one of claims 1 to 7, or the method according to any one of claims 8 to 14, or the method according to any one of claims 15 to 29, or the method according to any one of claims 30 to 44 is implemented.

Images