WO2024032396A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2024032396A1
WO2024032396A1 PCT/CN2023/110042 CN2023110042W WO2024032396A1 WO 2024032396 A1 WO2024032396 A1 WO 2024032396A1 CN 2023110042 W CN2023110042 W CN 2023110042W WO 2024032396 A1 WO2024032396 A1 WO 2024032396A1
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WIPO (PCT)
Prior art keywords
path loss
reference signals
downlink path
loss reference
information
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PCT/CN2023/110042
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English (en)
Chinese (zh)
Inventor
刘晓晴
刘江华
余政
李铁
张哲宁
Original Assignee
华为技术有限公司
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Publication of WO2024032396A1 publication Critical patent/WO2024032396A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink

Definitions

  • the present application relates to the field of communication technology, and in particular, to a communication method and device.
  • the terminal device needs to send a sounding reference signal (SRS) to the network side so that the network side can determine the channel information.
  • SRS sounding reference signal
  • the network side needs to perform uplink power control.
  • uplink power control on the network side includes: the network side sends a path loss reference signal (PL-RS) to the terminal device, and the terminal device calculates the path loss value based on the PL-RS and determines the transmission based on the path loss value.
  • PL-RS path loss reference signal
  • the network side needs to measure the downlink channel information between each TRP in multiple TRPs and the terminal device.
  • the network side measures the downlink channel information between each TRP and the terminal device.
  • the TRP sends a path loss reference signal, and then the terminal device uses the transmit power determined by the path loss reference signal sent by the closer/farer TRP to send SRS.
  • Different TRPs determine the corresponding channels after receiving the same SRS.
  • the terminal device receives the path loss reference signal sent by each TRP in multiple TRPs, and sends the SRS on different resources based on the transmit power calculated based on the path loss reference signal sent by each TRP.
  • different TRPs respectively determine the corresponding channel information after receiving the corresponding SRS.
  • the above first implementation method may cause the problem of non-uniform power when the terminal device sends SRS to different TRPs. For example, if the terminal device transmits SRS using the transmission power determined by the path loss reference signal sent by the TRP that is closer, the power of the SRS received by the TRP that is farther away may be lower; and for the above second implementation method , which will lead to high power consumption of the terminal equipment.
  • This application provides a communication method and device, which helps to solve the problem of non-uniform power of terminal equipment when sending SRS to different TRPs and the problem of high power consumption of terminal equipment.
  • this application provides a communication method, applied to terminal equipment, including: receiving N downlink path loss reference signals, where the N downlink path loss reference signals include M downlink path loss reference signals, and N is greater than or equal to 2. is a positive integer, M is a positive integer less than or equal to N; determine the first transmit power, and the first transmit power is associated with the transmit power corresponding to one or more downlink path loss reference signals among the M downlink path loss reference signals; send The first information is used to indicate that the uplink reference signal corresponding to the M downlink path loss reference signals is sent on the first resource; and the uplink reference signal is sent on the first resource with the first transmit power.
  • the terminal device after receiving N downlink path loss reference signals, the terminal device indicates to the network device M downlink paths that can simultaneously receive the uplink reference signals sent by the terminal device on the first resource.
  • loss reference signal (corresponding to M TRPs)
  • M TRPs the network device only M TRPs among the N TRPs can be used to simultaneously receive the uplink reference signal sent by the terminal device on the first resource, and for the remaining N-M TRPs , respectively receiving the uplink reference signals corresponding to their respective TRPs.
  • the M downlink path loss reference signals satisfy one or more of the following conditions: two downlink path loss reference signals among the M downlink path loss reference signals The difference between the path loss values corresponding to the signals is less than the first threshold, and the difference in transmit power of the uplink reference signals corresponding to two of the M downlink path loss reference signals is less than the first threshold.
  • the terminal device uses the first transmit power to send the uplink reference signal on the first resource, the uplink reference signals received by the M TRPs
  • the transmit power is a relatively moderate power.
  • the first transmit power is any one of the following: the maximum value among the M transmit powers corresponding to the M downlink path loss reference signals, the M The minimum value among the M transmit powers, the average value of the M transmit powers, and a value among the M transmit powers.
  • the first transmit power is The transmit power corresponding to the first downlink path loss reference signal.
  • the first information includes identification information of one or more downlink path loss reference signals among the M downlink path loss reference signals.
  • the method before receiving N downlink path loss reference signals, the method further includes: receiving second information, where the second information includes a set of resource information and N pieces of identification information, the set of resource information indicates the first resource, and the N pieces of identification information indicate the N downlink path loss reference signals.
  • the network device can indicate to the terminal device N downlink path loss reference signals and the resource information that the terminal device needs to use when sending uplink reference signals to the terminal device through a set of resource information and N pieces of identification information. It can be understood that in this implementation, since the network device is only configured with a set of resource information, resources of the communication system can be saved.
  • the method before receiving N downlink path loss reference signals, the method further includes: receiving third information, where the third information includes N sets of resource information and N pieces of identification information, N groups of resource information indicate N different resources, N pieces of identification information indicate N downlink path loss reference signals, and N groups of resource information correspond to N pieces of identification information; the uplink reference signal is transmitted on the first resource using the first transmit power, It also includes: determining a resource indicated by a group of resource information in M groups of resource information as the first resource, and the M group of resource information corresponds to M downlink path loss reference signals.
  • the network device may indicate to the terminal device N sets of downlink path loss reference signals and the resource information that the terminal device needs to use when sending uplink reference signals in the form of N sets of resource information and N pieces of identification information. It can be understood that in this implementation, since the network device has configured N sets of resource information required for N TRPs in advance, radio resource control (RRC) reconfiguration can be avoided, further reducing the number of uplink transmissions by the terminal device. Delay problem when reference signal.
  • RRC radio resource control
  • the method before transmitting the uplink reference signal using the first transmit power on the first resource, the method further includes: receiving fourth information; and when the fourth information indicates the first When in the state, use the first transmit power to send the uplink reference signal on the first resource.
  • the network device after receiving the first information, the network device will feed back the fourth information to the terminal device. Only when the fourth information indicates the first state, the terminal device will use the first transmit power on the first resource. Send uplink reference signals. It can be understood that this implementation method can improve the accuracy of the communication system.
  • this application provides a communication method, applied to network equipment, including: sending N downlink path loss reference signals, where the N downlink path loss reference signals include M downlink path loss reference signals, where N is greater than or A positive integer equal to 2, M is a positive integer less than or equal to N; receiving the first information, the first information is used to indicate that the uplink reference signals corresponding to the M downlink path loss reference signals are sent by the terminal equipment on the first resource; Receive an uplink reference signal sent by the terminal device on the first resource using a first transmission power, and the first transmission power is associated with the transmission power corresponding to one or more downlink path loss reference signals among the M downlink path loss reference signals.
  • the M downlink path loss reference signals satisfy one of the following conditions: One or more items: the difference between the path loss values corresponding to two of the M downlink path loss reference signals is less than the first threshold, and the difference between the path loss values corresponding to two of the M downlink path loss reference signals is The difference between the transmission powers of the uplink reference signals corresponding to the signals is less than the first threshold.
  • the first transmit power is any one of the following: the maximum value among M transmit powers corresponding to the M downlink path loss reference signals, the M The minimum value among the M transmit powers, the average value of the M transmit powers, and a value among the M transmit powers.
  • the first transmit power is The transmit power corresponding to the first downlink path loss reference signal.
  • the first information includes identification information of one or more downlink path loss reference signals among the M downlink path loss reference signals.
  • the method before sending the N downlink path loss reference signals, further includes: sending second information, where the second information includes a set of resource information and N identifiers.
  • the second information includes a set of resource information and N identifiers.
  • Information indicates the first resource
  • the N pieces of identification information indicate N downlink path loss reference signals.
  • the method further includes: sending third information, the third information includes N groups of resource information and N pieces of identification information, the N group of resource information indicates N Different resources, the N pieces of identification information indicate the N downlink path loss reference signals, and the N sets of resource information correspond to the N pieces of identification information.
  • the method further includes: sending fourth information.
  • this application provides a communication method, applied to terminal equipment, including: receiving N repetition factors, each repetition factor indicating the number of orthogonal frequency division multiplexing OFDM symbols used by the terminal equipment when sending uplink reference signals, so
  • the N repetition factors correspond to N downlink path loss reference signals; receive the N downlink path loss reference signals; and according to the first transmission corresponding to each downlink path loss reference signal among the first i-1 downlink path loss reference signals power and the first transmit power corresponding to the i-th downlink path loss reference signal, determine the second transmission corresponding to each of the K OFDM symbols indicated by the i-th repetition factor corresponding to the i-th downlink path loss reference signal Power, i ranges from 1 to N, and K is a positive integer; the uplink reference signal is sent using the second transmit power on each OFDM symbol.
  • the sum of the K second transmit powers corresponding to the K OFDM symbols is the same as the first transmit power corresponding to the i-th path loss reference signal.
  • the sum of the K second transmit powers corresponding to the K OFDM symbols is the same as the target transmit power, and the target transmit power is the i-th path loss reference 2 times the first transmit power corresponding to the signal.
  • this application provides a communication method, which is applied to network equipment, including: sending N repetition factors, each repetition factor indicating the number of orthogonal frequency division multiplexing OFDM symbols used by the terminal equipment when sending uplink reference signals, so The N repetition factors correspond to N downlink path loss reference signals; the N downlink path loss reference signals are sent; and the uplink reference signal sent by the terminal device is received on each OFDM symbol.
  • this application provides a communication device, applied to terminal equipment, including: a receiving module, configured to receive N downlink path loss reference signals, where the N downlink path loss reference signals include M downlink path loss reference signals. , N is a positive integer greater than or equal to 2, M is a positive integer less than or equal to N; the processing module is used to determine the first transmit power, the first transmit power and the M downlink path loss reference signals Transmit power correlation corresponding to one or more downlink path loss reference signals; a sending module, configured to send first information, the first information being used to indicate that the uplink reference signals corresponding to the M downlink path loss reference signals are in the first Send on the resource; the sending module is further configured to: send the uplink reference signal on the first resource using the first transmit power.
  • the M downlink path loss reference signals satisfy one or more of the following conditions: two downlink path loss reference signals among the M downlink path loss reference signals The difference between the path loss values corresponding to the signals is less than the first threshold, and the difference in transmit power of the uplink reference signals corresponding to two of the M downlink path loss reference signals is less than the first threshold.
  • the first transmit power is any one of the following: with the M The maximum value among the M transmit powers corresponding to the downlink path loss reference signal, the minimum value among the M transmit powers, the average value of the M transmit powers, and a value among the M transmit powers.
  • the first transmit power is The transmit power corresponding to the first downlink path loss reference signal.
  • the first information includes identification information of one or more downlink path loss reference signals among the M downlink path loss reference signals.
  • the receiving module is further configured to: receive second information, where the second information includes a set of resource information and N pieces of identification information, and the set of resource information indicates In the first resource, the N pieces of identification information indicate the N downlink path loss reference signals.
  • the receiving module is further configured to: receive third information, where the third information includes N groups of resource information and N pieces of identification information, and the N group of resource information indicates N different resources, the N identification information indicates the N downlink path loss reference signals, and the N groups of resource information correspond to the N identification information; the processing module is also used to: convert the M groups of resources The resources indicated by a group of resource information in the information are determined as the first resources, and the M groups of resource information correspond to the M downlink path loss reference signals.
  • the receiving module is further configured to: receive fourth information; and the sending module is further configured to: when the fourth information indicates the first state, when the The uplink reference signal is sent on the first resource using the first transmit power.
  • the present application provides a communication device, applied to network equipment, including: a sending module, configured to send N downlink path loss reference signals, where the N downlink path loss reference signals include M downlink path loss reference signals. , N is a positive integer greater than or equal to 2, M is a positive integer less than or equal to N; the receiving module is configured to receive first information, the first information is used to indicate the M downlink path loss reference signals corresponding to The uplink reference signal is sent by the terminal device on the first resource; the receiving module is also configured to: receive the uplink reference signal sent by the terminal device on the first resource with the first transmit power, the first transmitter The power is associated with the transmission power corresponding to one or more downlink path loss reference signals among the M downlink path loss reference signals.
  • a sending module configured to send N downlink path loss reference signals, where the N downlink path loss reference signals include M downlink path loss reference signals.
  • N is a positive integer greater than or equal to 2
  • M is a positive integer less than or equal to N
  • the receiving module is configured to
  • the M downlink path loss reference signals satisfy one or more of the following conditions: two downlink path loss reference signals among the M downlink path loss reference signals The difference between the path loss values corresponding to the signals is less than the first threshold, and the difference in transmit power of the uplink reference signals corresponding to two of the M downlink path loss reference signals is less than the first threshold.
  • the first transmit power is any one of the following: the maximum value among M transmit powers corresponding to the M downlink path loss reference signals, the M The minimum value among the M transmit powers, the average value of the M transmit powers, and a value among the M transmit powers.
  • the first transmit power is The transmit power corresponding to the first downlink path loss reference signal.
  • the first information includes identification information of each downlink path loss reference signal among the M downlink path loss reference signals.
  • the sending module is further configured to: send second information, where the second information includes a set of resource information and N pieces of identification information, and the set of resource information indicates In the first resource, the N pieces of identification information indicate the N downlink path loss reference signals.
  • the sending module is further configured to: send third information, where the third information includes N groups of resource information and N pieces of identification information, and the N group of resource information indicates N different resources, the N pieces of identification information indicate the N downlink path loss reference signals, and the N sets of resource information correspond to the N pieces of identification information.
  • the sending module is further configured to: send fourth information.
  • this application provides a communication device, applied to terminal equipment, including: a receiving module, configured to receive N repetition factors, each repetition factor indicating the orthogonal frequency division multiplexing used by the terminal equipment when sending uplink reference signals.
  • OFDM symbol number the N repetition factors correspond to N downlink path loss reference signals;
  • the receiving module is also used to: receive the N downlink path loss parameters signal;
  • a processing module used to determine the transmit power corresponding to each path loss reference signal among the N path loss reference signals;
  • the processing module is also used to: according to each of the first i-1 downlink path loss reference signals
  • the first transmit power corresponding to the downlink path loss reference signal and the first transmit power corresponding to the i-th downlink path loss reference signal determine the K OFDM indicated by the i-th repetition factor corresponding to the i-th downlink path loss reference signal.
  • the second transmit power corresponding to each OFDM symbol in the symbol, i ranges from 1 to N, and K is a positive integer;
  • a sending module configured to use the
  • the sum of the K second transmit powers corresponding to the K OFDM symbols is the same as the first transmit power corresponding to the i-th path loss reference signal.
  • the sum of the K second transmit powers corresponding to the K OFDM symbols is the same as the target transmit power, and the target transmit power is the i-th path loss reference 2 times the first transmit power corresponding to the signal.
  • this application provides a communication device, applied to network equipment, including: a sending module, configured to send N repetition factors, each repetition factor indicating the orthogonal frequency division multiplexing used by the terminal equipment when sending uplink reference signals.
  • the number of OFDM symbols, the N repetition factors correspond to the N downlink path loss reference signals;
  • the sending module is also used to send the N downlink path loss reference signals;
  • the receiving module is used to Receive the uplink reference signal sent by the terminal device.
  • the present application provides a communication system, including the devices described in the fifth and sixth aspects or the devices described in the seventh and eighth aspects.
  • the present application provides a communication device, including: a memory and a processor; the memory is used to store program instructions; the processor is used to call the program instructions in the memory to execute the first to fourth aspects. Or any of the possible implementation methods.
  • the present application provides a communication device, including: a memory and a processor; the memory is used to store program instructions; the processor is used to call the program instructions in the memory to execute the first to fourth aspects. Aspects or methods described in any of the possible implementations.
  • the present application provides a computer-readable medium that stores program code for computer execution.
  • the program code includes a program code for executing the first to fourth aspects or any one of the possibilities.
  • the present application provides a computer program product.
  • the computer program product includes computer program code.
  • the computer program code When the computer program code is run on a computer, the computer implements the first to fourth aspects. Aspects or methods described in any of the possible implementations.
  • Figure 1 is a schematic structural diagram of the communication system
  • Figure 2 is a structural schematic diagram of the application scenario provided by this application.
  • Figure 3 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • Figure 4 is a schematic flowchart of a communication method provided by another embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a terminal device configured with N SRS resource set information according to an embodiment of the present application
  • Figure 6 is a schematic flowchart of a communication method provided by another embodiment of the present application.
  • Figure 7 is a schematic structural diagram of a terminal device configured with N SRS resource set information provided by another embodiment of the present application.
  • FIG. 8 is a structural schematic diagram of sending SRS provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of the communication device provided by this application.
  • Figure 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same functions and effects.
  • the first information and the second information are used to distinguish different information, and their order is not limited.
  • words such as “first” and “second” and The quantity and order of execution are not limited, and words such as "first” and “second” are not limited to being different.
  • At least one means one or more
  • plural means two or more.
  • “And/or” describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related objects are in an “or” relationship.
  • “At least one of the following” or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items).
  • At least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.
  • the reference signal is a known signal provided by the transmitting end to the receiving end for estimating or detecting wireless channel information.
  • This wireless channel information can be very rough, such as the path loss information of the wireless channel. Knowing the path loss information can control the transmission power at the transmitting end.
  • Wireless channel information can also be very detailed, such as accurate channel amplitude and phase information of wireless channels in the time domain, frequency domain, and spatial domain.
  • the physical layer includes uplink communication and downlink communication.
  • Uplink communication includes the transmission of uplink physical channels and uplink reference signals
  • downlink communication includes the transmission of downlink physical channels and downlink reference signals.
  • uplink physical channels include random access channel (PRACH), uplink control channel (physical uplink control channel, PUCCH), uplink data channel (physical uplink shared channel, PUSCH), etc.
  • Downlink physical channels include broadcast channel (physical broadcast channel, PBCH), downlink control channel (physical downlink control channel, PDCCH), downlink data channel (physical downlink shared channel, PDSCH), etc.
  • the uplink reference signal refers to the reference signal sent from the terminal equipment to the base station (BS) or multiple transceiver points (transmission and receiving point, TRP), that is, the transmitting end is the terminal equipment, and the receiving end is the BS or TRP.
  • the uplink reference signal includes a channel sounding reference signal (SRS), a demodulation reference signal (de-modulation reference signal, DMRS) of the uplink control channel, and a demodulation reference signal (PUSCH-DMRS) of the uplink data channel.
  • SRS channel sounding reference signal
  • DMRS demodulation reference signal
  • PUSCH-DMRS demodulation reference signal
  • PTRS uplink phase noise tracking reference signal
  • uplink positioning signal etc.
  • the downlink reference signal refers to the reference signal sent from the BS or TRP to the terminal equipment, that is, the transmitting end is the BS or TRP, and the receiving end is the terminal equipment.
  • the downlink reference signal includes primary synchronization signal (PSS)/secondary synchronization signal (SSS), downlink control channel demodulation reference signal (PDCCH-DMRS), downlink data channel demodulation Reference signal (PDSCH-DMRS), phase noise tracking signal, channel status information reference signal (CSI-RS), cell signal (cell reference signal, CRS) (NR does not have), fine synchronization signal (time/ frequency tracking reference signal, TRS) (not available in LTE), LTE/NR positioning signal (positioning RS), etc.
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PDCCH-DMRS downlink control channel demodulation reference signal
  • PDSCH-DMRS downlink data channel demodulation Reference signal
  • phase noise tracking signal channel status information reference signal
  • CSI-RS channel status information reference signal
  • the downlink channel information can be obtained by the terminal equipment measuring the downlink reference signal, and then reporting the measured downlink channel information to the network, and then the network sets appropriate transmission settings for subsequent downlink transmission based on this downlink channel information. parameter.
  • the downlink channel information in the time division duplexing (TDD) system it can also be obtained based on channel heterogeneity, that is, the uplink channel and the downlink channel are considered to be the same in some channel characteristics.
  • the network side can pass the uplink reference
  • the signal is measured to obtain the uplink channel information, and then the relevant downlink channel information is estimated based on the obtained uplink channel information.
  • the sounding reference signal is an uplink reference signal that is sent by the terminal equipment to the base station equipment.
  • SRS currently supports four functions: codebook-based uplink transmission, support for non-codebook-based uplink transmission, beam management, and antenna switching.
  • the base station can configure one or more SRS resource sets for the terminal device through high-layer parameters, and the applicability of each SRS resource set is configured through high-layer parameters.
  • the transmission of SRS by the terminal device depends on signaling information, such as radio resource control (RRC) connection settings, RRC connection reconfiguration, etc. That is, the base station notifies the terminal device of the SRS configuration through these RRC information.
  • RRC radio resource control
  • SRS is configured in "SRS-ConfigIE”.
  • a list of SRS resource sets (SRS-resourceset) is defined in "SRS-ConfigIE”.
  • the terminal device can be configured with one or more SRS resource sets through the high-level parameter SRS-resourceset, and each SRS resource set defines a set of SRS resources (SRS-Resource).
  • the terminal device For a given SRS resource, the terminal device will be configured to send the number N s of consecutive orthogonal frequency division multiplexing (OFDM) symbols of the set of SRS resources, the starting OFDM symbol and the repetition factor R, by
  • OFDM orthogonal frequency division multiplexing
  • the above three parameters can configure the repetition and/or frequency hopping of an SRS resource within a time slot.
  • the specific configuration method is as follows:
  • only the repetition of one SRS resource in one time slot is configured, and the SRS is sent in a repeated manner on all configured OFDM symbols. That is, within a time slot, on N s consecutive symbols starting from the starting OFDM symbol, the frequency domain resources mapped to each antenna port of the SRS resource are the same (for example, the same subcarrier set of the same PRB set). That is, SRS is sent in a repeated manner on consecutive N s symbols.
  • the SRS resource If R ⁇ N s , frequency hopping and repetition of an SRS resource in a time slot are configured, that is, in a time slot, on every R adjacent OFDM symbols starting from the starting OFDM symbol, the SRS resource
  • the frequency domain resources mapped to each antenna port are the same; different Between groups of OFDM symbols, the frequency domain resources mapped to each antenna port of the SRS resource are different.
  • increasing the transmission power of terminal equipment for sending uplink reference signals can meet the required signal-to-noise ratio or bit error rate on the network side, while reducing the transmission power of terminal equipment for sending uplink reference signals can reduce the interference between terminals between cells and within cells. interference and power consumption of terminal equipment. Therefore, when the terminal equipment sends the uplink reference signal, the network side usually needs to perform uplink power control to achieve: reduce the bit error rate and packet loss rate, ensure the transmission success rate and service quality, save the transmission power of the terminal equipment (energy saving), reduce interference and improve channel capacity.
  • the formula for calculating the transmit power of SRS on each uplink carrier in the communication system is as follows: the terminal device uses SRS on the uplink part bandwidth (Bandwidth part, BWP) b of carrier f of serving cell c based on the configuration of SRS-resourceset. Power control adjustment state l transmits SRS, and the transmit power of SRS on each OFDM symbol is calculated according to the following formula:
  • c is the serving cell of the terminal device
  • f represents the carrier of the serving cell
  • b represents the uplink part bandwidth (bandwidth part, BWP) of f
  • l represents the SRS power control adjustment state used by the terminal device
  • P CMAX, f, c(i) is the terminal’s configured maximum transmit power on carrier f of serving cell c within SRS transmission opportunity i, is the static working point of the base station, that is, the base station expects the received power on b of carrier f of serving cell c for SRS resource set q s , which can be configured in SRS resource set units through high-level parameter p0;
  • the terminal equipment calculates the downlink path loss based on the path loss reference signal (PL-RS) with index q d .
  • the path loss reference signal can be a synchronization signal or a physical broadcast channel (synchronization signal/physical broadcast channel, SS/PBCH) block index, or channel state information reference signal (channel state information reference signal, CSI-RS);
  • h b, f, c (i, l) are the power control adjustment amounts indicated by the transmission power control (TPC) command in the downlink control information (DCI), which is closed-loop power control.
  • SRS can have joint power control with the physical uplink shared channel (PUSCH), that is, the power adjustment amount of SRS is the same as that of PUSCH; it can also perform power control independent of PUSCH, in which case the TPC command of SRS passes DCI format 2_3 carried on the physical downlink control channel (PDCCH) is delivered to the terminal.
  • PUSCH physical uplink shared channel
  • PDCH physical downlink control channel
  • the communication system includes a network device 101 and a terminal device 102.
  • the network device 101 can be any device with wireless transceiver function.
  • the equipment includes but is not limited to: evolved NodeB (evolved NodeB, eNB or eNodeB), wireless network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base stationcontroller, BSC) , base transceiver station (BTS), home base station (e.g., homeevolved NodeB, or home Node B, HNB), base band unit (BBU), wireless fidelity (WIFI) system Access point (AP), wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc.
  • 5G such as NR, A gNB in the system, or a transmission point (TRP or TP), one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, or it can also be a network node that constitutes a gNB or transmission point, such
  • gNB may include centralized units (CUs) and DUs.
  • the gNB may also include a radio unit (RU).
  • CU implements some functions of gNB
  • DU implements some functions of gNB.
  • CU implements radio resource control (RRC), packet data convergence protocol (PDCP) layer functions
  • RLC wireless chain Radio link control
  • MAC media access control
  • PHY physical
  • the network device may be a CU node, a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into network equipment in the access network (radio access network, RAN), or the CU can be divided into network equipment in the core network (core network, CN), which is not limited in this application.
  • the terminal device 102 may be a device that provides voice and/or data connectivity to a user, such as a handheld device, a vehicle-mounted device, etc. with wireless connectivity capabilities.
  • Terminal equipment can also be called user equipment (UE), access terminal (access terminal), user unit (user unit), user station (user station), mobile station (mobile station), mobile station (mobile), Remote station, remote terminal, mobile equipment, user terminal, wireless telecom equipment, user agent, user equipment or user device.
  • UE user equipment
  • access terminal access terminal
  • user unit user unit
  • user station user station
  • mobile station mobile station
  • Remote station remote terminal, mobile equipment, user terminal, wireless telecom equipment, user agent, user equipment or user device.
  • the terminal device can be a station (STA) in a wireless local area network (WLAN), a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (wireless local) loop (WLL) stations, personal digital assistant (PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, and next-generation communication systems ( For example, terminals in the fifth-generation (5G) communication network) or terminal equipment in the future evolved public land mobile network (public land mobile network, PLMN) network, etc. Among them, 5G can also be called new radio (new radio, NR).
  • 5G fifth-generation
  • NR new radio
  • the terminal device may also be a terminal device that often works on the ground, such as a vehicle-mounted device.
  • the chip deployed in the above-mentioned device, or the chip may also be called a terminal device.
  • terminal equipment and UE are interchangeable, and the terms base station and network equipment are also interchangeable.
  • network equipment and terminal equipment can communicate through licensed spectrum or unlicensed spectrum. It can also communicate through licensed spectrum and unlicensed spectrum at the same time.
  • Network equipment and terminal equipment can communicate through the spectrum below 6 gigahertz (GHZ), or through the spectrum above 6 GHZ, or they can communicate using the spectrum below 6 GHZ and the spectrum above 6 GHZ at the same time.
  • GHZ gigahertz
  • the embodiments of this application do not limit the spectrum resources used between the network device and the terminal device.
  • the number of terminal devices shown in Figure 1 is only an example. In the actual process, the number of terminal devices can also be other numbers.
  • the communication system may also include other network elements, for example, it may also include core network equipment, and the network equipment may be connected to the core network equipment. It should be noted here that the specific forms of network equipment and terminal equipment are not limited in the embodiments of the present application.
  • the terminal device or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • This hardware layer includes hardware such as central processing unit (CPU), memory management unit (MMU) and memory (also called main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system or windows operating system, etc.
  • This application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide according to the embodiment of the present application. method to communicate.
  • the execution subject of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call a program and execute the program.
  • computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, tapes, etc.), optical disks (e.g., compact discs (CD), digital versatile discs (DVD)) etc.), smart cards and flash memory devices (e.g. erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • the various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.
  • the terminal device 102 needs to send a sounding reference signal (SRS) to the network device 101, so that the network device 101 determines the downlink channel between the network device 101 and the terminal device 102 information, and then can set appropriate transmission parameters for subsequent downlink transmission based on this downlink channel information.
  • SRS sounding reference signal
  • the network device 101 will send configuration information to the terminal device 102 to inform how SRS transmission should be performed, such as which SRS resource to use, the number of ports for each SRS resource, and so on.
  • SRS-ConfigIE can be used to configure SRS transmission.
  • the "SRS-ConfigIE" configuration information defines a list of SRS resource sets (SRS-resourceset), and each SRS resource set defines a set of SRS resources (SRS-Resource).
  • the transmission of the uplink SRS can be implemented based on the above configuration information sent by the network device.
  • the transmission of uplink SRS also needs to consider the transmit power of the terminal equipment. If the transmit power used by the terminal equipment is too high, it will cause excessive interference to other transmissions of the same time-frequency resource. If the transmit power used is too small, it will cause The service success rate and service quality are reduced. Therefore, the network device 101 needs to perform uplink power control for the transmission power when the terminal device sends SRS.
  • the method for the network device 101 to control the uplink power of the terminal device 102 is as follows: the network device 101 sends a path loss reference signal (PL-RS) to the terminal device 102, and the terminal device calculates PL-RS based on the set formula.
  • the path loss value corresponding to the RS, and the transmit power used to send the SRS is determined based on the path loss value.
  • the formula for the terminal device to determine the path loss value and transmit power based on the PL-RS can refer to the relevant description of the power control of the SRS in the introduction of the aforementioned terms, which will not be described again here.
  • the path loss reference signal is also called the downlink path loss reference signal
  • the reference signal sent by the terminal device is called the uplink reference signal
  • FIG. 2 is a structural schematic diagram of the application scenario provided by this application. As shown in Figure 2, TRP1 and TRP2 can provide data transmission services for the same terminal device 120. It should be noted here that TRP1 and TRP2 in Figure 2 are only an example and do not constitute a limitation of this application. In specific scenarios, more TRPs may be included.
  • the network device 101 needs to measure the downlink channel information between each TRP and the terminal device, and in this scenario, when the terminal device sends an SRS, the SRS can be used by multiple TRPs. received. Therefore, the industry currently proposes the following three implementation methods to measure the downlink channel information between each TRP in multiple TRPs and the terminal device. For the convenience of description, this application takes the multiple TRPs as N TRPs as an example for introduction.
  • the network device sends the downlink path loss reference signal through the TRP that is close to the terminal device, and sends an SRS resource set information to the terminal device.
  • the SRS resource set information indicates the resources used by the terminal device when sending SRS. ;
  • the transmit power can be determined based on the downlink path loss reference signal, and the transmit power can be used to indicate the SRS resource set information.
  • SRS is sent on the resource; correspondingly, each TRP among the N TRPs receives the SRS at the same time, and determines the corresponding downlink channel information based on the received SRS.
  • the network device sends the downlink path loss reference signal through the TRP that is far away from the terminal device, and sends an SRS resource set information to the terminal device.
  • the SRS resource set information indicates the resources used by the terminal device when sending SRS. ;
  • the transmit power can be determined based on the downlink path loss reference signal, and the transmit power can be used in the SRS resource set information indication.
  • SRS is sent on the resource; correspondingly, each TRP among the N TRPs receives the SRS at the same time, and determines the corresponding downlink channel information based on the received SRS.
  • the network device sends the downlink path loss reference signal to the terminal device through each of the N TRPs, and sends the SRS resource set information corresponding to each TRP to the terminal device; for the terminal device, receive The downlink path loss reference signal and SRS resource set information corresponding to each TRP, and after determining the transmit power corresponding to each TRP based on the downlink path loss reference signal, use the transmit power on the resources indicated by the corresponding SRS resource set information.
  • SRS is sent; accordingly, each TRP in the plurality of TRPs receives the corresponding SRS, and determines the corresponding downlink channel information based on the received SRS.
  • the transmit power for sending SRS is determined only based on the downlink path loss reference signal sent by one TRP
  • the problem For example, if the terminal device only calculates the transmit power based on the downlink path loss reference signal of the nearby TRP, then for the farther away TRP, the power may be lower when receiving the SRS, resulting in a poor reception signal-to-noise comparison. Low, thereby reducing service success rate and service quality.
  • the terminal equipment only calculates the transmit power based on the downlink path loss reference signal of the farther away TRP, then for the closer TRP, the received SRS may have higher power, which will cause the SRS to affect other terminal equipment.
  • the transmitted information causes strong interference, resulting in reduced overall system performance.
  • the terminal equipment may increase On the other hand, due to the increase in time-frequency resources occupied by SRS resources, it will also lead to a waste of resources in the entire communication system.
  • the terminal device uses the transmit power determined based on the downlink path loss reference signal of a certain TRP to send SRS to different TRPs on the resources indicated by the SRS resource set information, it will cause The problem of power non-uniformity arises; if the terminal equipment uses the transmit power determined by the downlink path loss reference signals corresponding to multiple TRPs to send SRS to the corresponding TRP on the resources indicated by the SRS resource set information corresponding to each TRP, it will This brings about problems of power waste in terminal equipment and capacity reduction of communication systems.
  • embodiments of the present application provide a communication method and device, which helps to solve the problem of non-uniform power of terminal equipment when sending SRS to different TRPs and the problem of high power consumption of terminal equipment.
  • Figure 3 is a schematic flowchart of a communication method provided by an embodiment of the present application. As shown in Figure 3, the method may include: S310, S320, S330 and S340. The method includes the following steps:
  • the network device sends N downlink path loss reference signals to the terminal device.
  • the terminal device receives N downlink path loss reference signals.
  • the N downlink path loss reference signals include M downlink path loss reference signals, and N is A positive integer greater than or equal to 2, M is a positive integer less than or equal to N.
  • N downlink path loss reference signals correspond to N TRPs.
  • N TRPs N downlink path loss reference signals.
  • TRP the concept of TRP, please refer to the description in related technologies, and will not be described again here.
  • the downlink path loss reference signal can be a synchronization signal or a physical broadcast channel (synchronization signal/physical broadcast channel, SS/PBCH) block index, or a channel state information reference signal (channel state information reference signal, CSI-RS). Or other downward reference signals.
  • the terminal device determines the first transmission power, where the first transmission power is associated with the transmission power corresponding to one or more downlink path loss reference signals among the M downlink path loss reference signals.
  • the terminal equipment can calculate the path loss value corresponding to each downlink path loss reference signal, and calculate the path loss value before sending the uplink reference signal to the corresponding TRP based on the path loss value.
  • the transmit power used when signaling For information on how to calculate the path loss value corresponding to each downlink path loss reference signal and calculate the transmit power used when transmitting the uplink reference signal based on the path loss value, please refer to the relevant technology and the power control section of the SRS in the terminology explanation of this application. Description will not be repeated here.
  • the first transmit power refers to the transmit power used when transmitting the uplink reference signal on the first resource.
  • the first transmit power is associated with the transmit power corresponding to one or more downlink path loss reference signals among the M downlink path loss reference signals included in the N downlink path loss reference signals.
  • the relationship between the first transmit power and the transmit power corresponding to one or more of the M downlink path loss reference signals means: the first transmit power is the transmit power corresponding to the M downlink path loss reference signals. obtained, instead of being obtained from the transmit power corresponding to the downlink path loss reference signals other than the M downlink path loss reference signals among the N downlink path loss reference signals.
  • the first transmission power may be associated with the transmission power corresponding to one downlink path loss signal among the M downlink path loss reference signals.
  • the first transmission power is the maximum value among the M transmission powers corresponding to the M downlink path loss reference signals; or, the first transmission power is the maximum value among the M transmission powers corresponding to the M downlink path loss reference signals. value; or, the first transmit power is any one of the M transmit powers corresponding to the M downlink path loss reference signals; or, the first transmit power of the serving cell where the M downlink path loss reference signals include the serving terminal equipment
  • the first transmission power is the transmission power corresponding to the first downlink path loss reference signal.
  • the first transmission power may be associated with the transmission power corresponding to a plurality of downlink path loss signals among the M downlink path loss reference signals.
  • the first transmit power is the average of the M transmit powers corresponding to the M downlink path loss reference signals; or, the first transmit power is the K downlink path loss reference signals among the M downlink path loss reference signals.
  • the average value of the corresponding K transmit powers, where K is less than M; or, the first transmit power is obtained by a weighted average of multiple transmit powers corresponding to the M downlink path loss references.
  • the uplink reference signal may be SRS.
  • the terminal device sends the first information to the network device.
  • the network device receives the first information.
  • the first information is used to indicate that the uplink reference signals corresponding to the M downlink path loss reference signals are sent on the first resource.
  • the first resource refers to the time-frequency resource used by the terminal device when transmitting the uplink reference signal corresponding to the M downlink path loss reference signals. It should be noted here that this application does not limit the implementation of how to obtain the first resource.
  • the M downlink path loss reference signals may correspond to the same uplink reference signal, and the uplink reference signal is sent on the first resource.
  • the network device may send the second information to the terminal device, and accordingly, the terminal device receives the second information, where the second information includes a set of resource information and N pieces of identification information, and the A set of resource information indicates the first resource, and N pieces of identification information indicate N downlink path loss reference signals.
  • the set of resource information may be a resource Set information, that is, in this implementation, the terminal device is configured with a resource set information, which includes information indicating N downlink path loss reference signals, and information indicating the first resource for transmitting the uplink reference signal.
  • a set of resource information is associated with N TRPs, and the N TRPs correspond to N downlink path loss reference signals.
  • the M downlink path loss reference signals may correspond to M uplink reference signals, and the terminal device may select one of the M uplink reference signals to send on the first resource.
  • the network device may send the third information to the terminal device, and accordingly, the terminal device receives the third information.
  • the third information includes N sets of resource information and N pieces of identification information.
  • N sets of The resource information indicates N different resources, the N pieces of identification information indicate N downlink path loss reference signals, and the N sets of resource information correspond to the N pieces of identification information.
  • the resources indicated by a set of resource information corresponding to any one of the M downlink path loss reference signals may be determined as the first resource.
  • the N sets of resource information may be N resource set information, and each resource set information includes information indicating a downlink path loss reference signal.
  • the functions of the N resource set information are the same, or the usage of the N resource set information is the same. It can also be understood that in this implementation manner, the N groups of resource information are associated with different TRPs.
  • N pieces of identification information described in the above-mentioned first implementation manner and the second implementation manner are also called N groups of power control (PC) parameters.
  • the terminal device when it determines the first transmit power corresponding to the uplink reference signal corresponding to the M downlink path loss reference signals, it will send the first information to the terminal device.
  • the first information is used to tell the network device:
  • the uplink reference signal corresponding to the M downlink path loss reference signals is the uplink reference signal sent on the first resource.
  • the network device after receiving the first information, if the terminal device sends the uplink reference signal on the first resource, then the network device can learn the M corresponding to the M downlink path loss reference signals.
  • Two TRPs simultaneously receive the uplink reference signal on the first resource. That is to say, in this embodiment, the terminal device notifies the network device of M TRPs that can simultaneously receive the uplink reference signal when transmitting the uplink reference signal on the same resource using the same transmit power.
  • the terminal device may report through physical layer signaling or high-layer signaling.
  • the terminal device reports through the uplink control information (UCI), or the terminal device reports through the capability of the terminal device, or the terminal device reports through the medium-access-control control element (MAC) CE).
  • UCI uplink control information
  • MAC medium-access-control control element
  • the first information includes identification information of one or more downlink path loss reference signals among the M downlink path loss reference signals, that is, the reported content can be understood as a path loss reference signal identification (ID).
  • ID path loss reference signal identification
  • the first information may only include the identification information of L downlink path loss reference signals among the M downlink path loss reference signals (L is less than M), and then based on the L downlink path loss reference signals The index relationship between the identification information and the M downlink path loss reference signals obtains each reported downlink path loss reference signal; alternatively, the identification information of each path loss reference signal may be included in the first information.
  • the first information may include group identification information, and the group identification information is used to indicate M TRPs corresponding to M path loss reference signals. That is, the reported content may be understood as identification associated with the M TRPs.
  • the terminal device may report the M downlink path loss reference signals to the network device.
  • M downlink path loss reference signals correspond to M TRPs
  • the terminal device determines the M downlink path loss reference signals, it reports the M downlink path loss reference signals to the network device, or it can also be hidden It is considered as an instruction: when the terminal device determines M downlink path loss reference signals, it reports the M TRPs to the network device.
  • S340 The terminal device sends the uplink reference signal using the first transmit power on the first resource, and accordingly, the network device receives the uplink reference signal.
  • the terminal device after the terminal device determines the first transmission power for sending the uplink reference signal on the first resource, it can use the first transmission power to send the uplink reference signal on the first resource. It can be understood that for the network device, since the terminal device reports the first information, it can learn the M TRPs that simultaneously receive the uplink reference signal based on the first information, and then use The M TRPs are used to receive the uplink reference signals respectively, and the measurement of the downlink channel information between each TRP in the M TRPs and the terminal equipment is completed.
  • the terminal device after receiving N downlink path loss reference signals, the terminal device indicates to the network that it can simultaneously receive the uplink reference signal sent by the terminal device on the first resource using the first transmit power. M TRPs. Therefore, for the network, only M TRPs among the N TRPs can be used to simultaneously receive the uplink reference signal sent by the terminal device on the first resource, and for the remaining N-M TRPs, the network can respectively receive the uplink reference signals corresponding to the respective TRPs. Uplink reference signal.
  • the terminal equipment after the terminal equipment determines the path loss values corresponding to the N downlink path loss reference signals or the transmit power of the uplink reference signals, it can determine M based on the N transmit powers or N path loss values.
  • Downlink path loss reference signal Specifically, the M downlink path loss reference signals satisfy the following conditions:
  • the transmission power difference between the M transmission powers corresponding to the M downlink path loss references is less than or equal to the first threshold.
  • the M downlink path loss reference signals may also satisfy the following conditions: the transmit power difference between the M transmit powers corresponding to the M TRPs Less than or equal to the first threshold.
  • the M path loss reference signals may also satisfy the following conditions: transmission between M path loss values corresponding to the M downlink path loss references The power difference is less than or equal to the first threshold.
  • the first threshold is predefined.
  • the first threshold may be configured by high-level parameters.
  • the first threshold may be determined by the terminal device and then reported to the network device.
  • the first threshold in this embodiment is an integer, such as 3 decibels (db), or 6db, or 10db, or the value set of the first threshold is ⁇ 3, 6, 10 ⁇ db.
  • the terminal device uses the first transmit power to send the uplink reference signal on the first resource, the uplink reference signals received by the M TRPs
  • the transmit power is a relatively moderate power, which can solve the problem of non-uniform power of the terminal equipment when sending uplink reference signals to M TRPs.
  • the method in this embodiment includes:
  • the network device sends SRS resource set information to the terminal device.
  • the terminal device receives the SRS resource set information.
  • the SRS resource set information includes a set of resource information and N pieces of identification information.
  • the set of resource information indicates the first resource.
  • N pieces of identification information indicate N downlink path loss reference signals.
  • the terminal device can be configured with an SRS resource set as shown in Figure 5, and then the SRS resource set information includes a set of resource information (such as SRS resource 1 and SRS resource 2 in Figure 5) and N identifiers. information.
  • SRS resource set information includes a set of resource information (such as SRS resource 1 and SRS resource 2 in Figure 5) and N identifiers. information.
  • the N pieces of identification information are also called a set of power control parameters.
  • the N pieces of identification information are also called a set of power control parameters.
  • PC1 corresponds to TRP1
  • PC2 corresponds to TRP2
  • PC3 corresponds to TRP3.
  • S420 The network device sends N downlink path loss reference signals to the terminal device.
  • the terminal device receives N downlink path loss reference signals. loss of reference signal.
  • the network device sends N downlink path loss reference signals to the terminal device on N time-frequency resources, and accordingly, the terminal device receives the corresponding N downlink path loss reference signals on N time-frequency resources.
  • the network device in this embodiment sends N downlink path loss reference signals to the terminal device.
  • N TRPs in the network device send N downlink path loss reference signals.
  • the terminal equipment calculates the transmit power of the reference signal corresponding to each of the N downlink path loss reference signals.
  • the terminal device determines the transmit power of the uplink reference signal based on the downlink path loss reference signal, please refer to the description in the related art, and will not be described again here.
  • the terminal device sends first information to the network device, which indicates that the uplink reference signal corresponding to the M downlink path loss reference signals is the uplink reference signal sent on the first resource; accordingly, the network device receives the first information.
  • the M downlink path loss reference signals satisfy one or more of the following conditions: the difference in path loss values corresponding to any two of the M downlink path loss reference signals is less than the first threshold , the difference in transmit power of the uplink reference signals corresponding to any two of the M downlink path loss reference signals is less than the first threshold, and the difference in the transmit power of the uplink reference signals corresponding to any two of the M TRPs less than the first threshold.
  • the first threshold is, for example, 3 decibels (db), or 6db, or 10db, or the value set of the first threshold is ⁇ 3, 6, 10 ⁇ db.
  • the terminal device may report the first information through physical layer signaling or high-layer signaling.
  • the terminal device reports through UCI, or the terminal device capability reports, or reports through MAC CE.
  • the reported content may be a path loss reference signal identification (ID), or an identification associated with the TRP.
  • ID path loss reference signal identification
  • M downlink path loss reference signals correspond to M TRPs. Therefore, in this embodiment, the first information can also be considered as reporting to the network device the uplink reference that can simultaneously receive the first transmit power and send on the first resource. M TRPs of the signal. In this embodiment, M TRPs are also called a TRP group.
  • the terminal device determines the first transmit power based on the M downlink path loss reference signals, and the first transmit power is associated with the transmit power corresponding to one or more of the M downlink path loss reference signals.
  • the first transmit power is calculated based on one of the M downlink path loss reference signals.
  • the first transmit power is determined based on M transmit powers corresponding to M downlink path loss reference signals.
  • the terminal device may determine the first transmit power according to predefined rules or high-level configuration.
  • the predefined rule may be any one of the following: the smallest transmit power among the M transmit powers; the largest transmit power among the M transmit powers; any transmit power among the M transmit powers; if the first set If the downlink path loss reference signal (or TRP) corresponding to the serving cell is included, the predefined rule is the transmit power corresponding to the serving cell of the terminal device.
  • the terminal device may also report the first transmit power it adopts.
  • the terminal device sends the SRS using the first transmit power on the first resource; correspondingly, the M TRPs corresponding to the M downlink path loss reference signals in the network device receive the SRS on the first resource.
  • the network device triggers the terminal device to report in a semi-static or dynamic manner. For example, the network device triggers the terminal device to report through RRC signaling or MAC CE signaling, or the network device triggers the terminal device to report through DCI. Report; 2. After the terminal device reports, the network device needs to be reconfigured. That is, for the N-M TRPs other than the above M TRPs among the N TRPs, the network device also needs to reconfigure the SRS for channel measurement.
  • the network device may send signaling to notify the terminal device whether to send SRS in accordance with the TRP group reported by the terminal device. If yes, the terminal device executes S406; if not, the terminal device sends an SRS to a TRP according to predefined rules.
  • the communication method provided in this embodiment considers that the terminal device reports a TRP group that can be received at the same time to the network device.
  • the terminal device since the terminal device can obtain accurate path loss information based on the downlink path loss reference signal, it can more accurately notify the network device to report TRP groups that can be received simultaneously.
  • any two TRPs in the TRP group in this embodiment satisfy that the path loss difference (or transmit power difference) is less than the first threshold. Therefore, the method of this embodiment can ensure that multiple TRPs receive the same SRS. Channel measurement performance, improve service success rate and service quality, and reduce interference.
  • the method in this embodiment includes:
  • the network device sends N SRS resource set information to the terminal device.
  • the terminal device receives N SRS resource set information.
  • Each SRS resource set information includes a set of resource information and an identification information.
  • Each SRS A group of resource information in the resource set information indicates a group of resources, and one piece of identification information in each SRS resource set information indicates a downlink path loss reference signal.
  • the terminal device may be configured with N pieces of SRS resource set information, and each SRS resource set includes a set of resource information and an identification information.
  • Figure 7 is a structural schematic diagram in which the terminal device is configured with N SRS resource set information.
  • SRS resource set 1 contains a set of SRS resources and an identification information PC1
  • SRS resource set 2 contains A set of SRS resources and an identification information PC2, and so on.
  • the SRS resource set N contains a set of SRS resources and an identification information PCN.
  • PC1 corresponds to TRP1
  • PC2 corresponds to TRP2
  • PCN corresponds to TRPN. Since different power control parameters in this embodiment are included in different SRS resource sets, it can also be considered that the SRS resource sets correspond to different TRPs.
  • S620 The network device sends N downlink path loss reference signals to the terminal device, and accordingly, the terminal device receives N downlink path loss reference signals.
  • the terminal device calculates the transmit power of the reference signal corresponding to each of the N path loss reference signals.
  • the terminal device determines the transmit power of the uplink reference signal based on the downlink path loss reference signal, please refer to the description in the related art, and will not be described again here.
  • the terminal device sends first information to the network device.
  • the first information is used to indicate that the uplink reference signal corresponding to the M downlink path loss reference signals is the uplink reference signal sent on the first resource.
  • the network device receives the a message.
  • the terminal device determines the first transmit power based on the M downlink path loss reference signals, where the first transmit power is associated with the transmit power corresponding to one or more of the M downlink path loss reference signals.
  • the terminal device uses the first transmit power to send the SRS on the first resource; correspondingly, the M TRPs corresponding to the M downlink path loss reference signals in the network device receive the SRS on the first resource.
  • the terminal device is configured with N different SRS resource sets.
  • the terminal equipment determines M downlink path loss reference signals or M TRPs, since the M TRPs receive the SRS sent on the same resource, in this embodiment, the terminal equipment determines After M downlink path loss reference signals or M TRPs, an SRS resource set needs to be determined, and then SRS is sent on a set of resources indicated by the SRS resource set.
  • the terminal device sends SRS on a set of resources indicated by one of the SRS resource sets, and does not send it on the resources indicated by the remaining M-1 SRS resource sets. SRS. Or, in other words, in this embodiment, the terminal device sends SRS on the resources indicated by N-M+1 SRS resource sets.
  • the network device may send signaling (also referred to as fourth information in this application) to notify the terminal device whether to send SRS in accordance with the TRP group reported by the terminal device. If yes, the terminal device executes S660; if not, the terminal device sends an SRS to a TRP according to predefined rules.
  • signaling also referred to as fourth information in this application
  • this embodiment may also include the following steps: the network device feeds back to the terminal device whether to perform SRS reception according to the TRP group reported by the terminal device. That is, the network device sends signaling to notify the terminal device whether to send SRS according to the TRP group reported by the terminal device. Under the premise of this step, if the feedback from the network device is yes, the terminal device performs the above S660. Otherwise, if the feedback from the network device is no, the terminal device sends messages on the resources indicated by the N SRS resource set information based on the configuration in S610. SRS.
  • the communication method provided in this embodiment is different from the communication method provided in Embodiment 1 in that: at the terminal After the device reports the TRP group, the network device does not need to be reconfigured. That is, the measurement of channel information of N TRPs can be completed through a semi-static configuration of the network device, avoiding RRC reconfiguration and reducing transmission delay.
  • the terminal device sends the same SRS, and the transmission power of the SRS is calculated according to the power control parameters of any TRP, while for one or more TRPs outside the TRP group For each TRP, the terminal device sends different SRS, and the transmission power of the SRS is calculated according to the power control parameters of each TRP.
  • this application also proposes a method of power accumulation of multiple OFDM symbols to transmit SRS for different TRPs. That is, the communication method uses different SRS transmission powers on different symbols of the same SRS resource.
  • the repetition factor of TRP1 (or serving cell) that is closer is 1, and the repetition factor of TRP2 (or cooperating cell) that is farther is 2.
  • the SRS transmitted on the first OFDM symbol The power is the power calculated based on the PC parameters of TRP1, and the SRS transmit power on the second OFDM symbol is (power calculated based on the PC parameters of TRP2 - power calculated based on the PC parameters of TRP1), or, the second The SRS transmit power on OFDM symbols is (2*power calculated based on the PC parameters of TRP2 - power calculated based on the PC parameters of TRP1).
  • Step 1 The terminal equipment is configured with an SRS resource set.
  • the SRS resource set contains N path loss reference signal identifiers (or N sets of PC parameters), which are assumed to be called PL-RS1, PL-RS2,..., PL-RSN respectively;
  • the SRS resource set includes SRS resource configuration information, where the above-mentioned SRS resource configuration information also includes N repetition factors R1, R2,..., RN; the above-mentioned N repetition factors are associated with N path loss reference signals (or N TRPs) , or the above N repetition factors correspond to N path loss reference signals (or N TRPs).
  • the order of PL-RS1, PL-RS2, ..., PL-RSN may be predefined or configured by high-level parameters. For example, the closer the TRP corresponding to the PL-RS is, the smaller the sequence number of the PL-RS is. For another example, the smaller the path loss value corresponding to the PL-RS, the smaller the sequence number of the PL-RS.
  • the repetition factors corresponding to TRPs far from the terminal equipment should be larger than the repetition factors corresponding to TRPs close to the terminal equipment.
  • Step 2 The terminal device receives N path loss reference signals (from N TRPs) and calculates the transmit power corresponding to each path loss reference signal.
  • Step 3 The terminal device sends the SRS, and accordingly, each of the N TRPs receives the SRS.
  • the SRS transmit power on R1 OFDM symbols is calculated according to PL-RS1
  • the SRS transmit power on R2 OFDM symbols is calculated according to PL-RS1 and PL-RS2
  • the SRS transmit power on R3 OFDM symbols is calculated.
  • the transmit power is calculated based on PL-RS2 and PL-RS3 and by analogy, the SRS transmit power on RN OFDM symbols is calculated based on PL-RS1, PL-RS2,..., PL-RSN.
  • TRP1 is the closest to the terminal device, followed by TRP2, and TRP3 is the farthest from the terminal device.
  • the R1 corresponding to TRP1 is equal to 1
  • the R2 corresponding to RP2 is equal to 2.
  • R3 corresponding to RP3 is equal to 3.
  • the transmit power of the SRS corresponding to TRP1 is P1
  • the transmit power of the SRS corresponding to RP2 is P2
  • the transmit power of the SRS corresponding to RP3 is P3.
  • the terminal device specifically transmits the SRS, it can use the transmission power P1 to transmit the SRS on the first OFDM symbol, and then use the transmission power P2-P1 on the second OFDM symbol or transmit the SRS, and then use the transmission power P2-P1 on the second OFDM symbol.
  • SRS is transmitted using transmit power P3-P2.
  • the terminal equipment can meet the transmit power requirement of TRP1 when transmitting SRS using transmit power P1 on the first OFDM symbol.
  • the total transmit power P2-P1 used can just meet TRP2.
  • the transmit power P1 is used on the first OFDM symbol
  • the transmit power P2-P1 is used on the second OFDM symbol
  • the transmit power P3- is used on the third OFDM symbol.
  • P2 combined can just satisfy TRP3.
  • the communication method of how the terminal device sends SRS to multiple TRPs on multiple OFDM symbols in the same SRS resource set is considered. By sequentially accumulating the transmit power on consecutive symbols from front to back, it satisfies Power control of different TRP demand, thus improving the transmission power utilization of terminal equipment and saving resources in some scenarios.
  • Figure 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application. Specifically, as shown in Figure 9, the device 900 includes: a receiving module 901, a sending module 902 and a processing module 903.
  • the communication device 900 can be applied to terminal equipment.
  • the receiving module 901 is used to receive N downlink path loss reference signals, the N downlink path loss reference signals include M downlink path loss reference signals, N is a positive integer greater than or equal to 2, and M is less than or equal to N is a positive integer;
  • the processing module 903 is used to determine the first transmit power, which is associated with the transmit power corresponding to one or more downlink path loss reference signals among the M downlink path loss reference signals;
  • the sending module 902 is configured to send first information, where the first information is used to indicate that the uplink reference signal corresponding to the M downlink path loss reference signals is sent on the first resource; the sending module 902 is also configured to The uplink reference signal is sent on the first resource using the first transmit power.
  • the receiving module 901 may be configured to perform the step of the terminal device receiving N downlink path loss reference signals in the method described in FIG. 3 .
  • the receiving module 901 is used to perform S310.
  • the M downlink path loss reference signals satisfy one or more of the following conditions: the path loss corresponding to two of the M downlink path loss reference signals is The difference in values is less than the first threshold, and the difference in transmit power of the uplink reference signals corresponding to two of the M downlink path loss reference signals is less than the first threshold.
  • the first transmit power is any one of the following: a maximum value among M transmit powers corresponding to the M downlink path loss reference signals, a maximum value among the M transmit powers Minimum value, the average value of the M transmit powers, and a value among the M transmit powers.
  • the M downlink path loss reference signals include a first downlink path loss reference signal of a serving cell serving the terminal device
  • the first transmit power is the first downlink path loss reference signal. Transmit power corresponding to the line path loss reference signal.
  • the first information includes identification information of one or more downlink path loss reference signals among the M downlink path loss reference signals.
  • the receiving module 901 is further configured to: receive second information, where the second information includes a set of resource information and N pieces of identification information, where the set of resource information indicates the first resource, the N pieces of identification information indicate the N downlink path loss reference signals.
  • the receiving module 901 is further configured to: receive third information, where the third information includes N groups of resource information and N pieces of identification information, and the N group of resource information indicates N different resources, the N pieces of identification information indicate the N pieces of downlink path loss reference signals, and the N groups of resource information correspond to the N pieces of identification information; the processing and sending module is also used to: convert the M groups of resource information into The resources indicated by a group of resource information are determined as the first resources, and the M groups of resource information correspond to the M downlink path loss reference signals.
  • the receiving module 901 is further configured to: receive fourth information; the sending module 902 is further configured to: when the fourth information indicates the first state, in the first resource The uplink reference signal is sent using the first transmit power.
  • the communication device 900 can be applied to access network equipment.
  • the sending module 902 is used to send N downlink path loss reference signals, the N downlink path loss reference signals include M downlink path loss reference signals, N is a positive integer greater than or equal to 2, and M is less than or equal to N is a positive integer;
  • the receiving module 901 is used to receive the first information, the first information is used to indicate that the uplink reference signals corresponding to the M downlink path loss reference signals are sent by the terminal equipment on the first resource;
  • the receiving module 901 is also configured to: receive the uplink reference signal sent by the terminal device on the first resource using a first transmit power, the first transmit power and one of the M downlink path loss reference signals. Or the transmission power correlation corresponding to multiple downlink path loss reference signals.
  • the M downlink path loss reference signals satisfy one or more of the following conditions: the path loss corresponding to two of the M downlink path loss reference signals is The difference in values is less than the first threshold, and the difference in transmit power of the uplink reference signals corresponding to two of the M downlink path loss reference signals is less than the first threshold.
  • the first transmit power is any one of the following: related to the M downlink path loss reference signals.
  • the maximum value among the M transmit powers corresponding to the number, the minimum value among the M transmit powers, the average value of the M transmit powers, and a value among the M transmit powers.
  • the M downlink path loss reference signals include a first downlink path loss reference signal of a serving cell serving the terminal device
  • the first transmit power is the first downlink path loss reference signal. Transmit power corresponding to the line path loss reference signal.
  • the first information includes identification information of one or more downlink path loss reference signals among the M downlink path loss reference signals.
  • the sending module 902 is further configured to: send second information, where the second information includes a set of resource information and N pieces of identification information, where the set of resource information indicates the first resource, the N pieces of identification information indicate the N downlink path loss reference signals.
  • the sending module 902 is further configured to: send third information, where the third information includes N groups of resource information and N pieces of identification information, and the N group of resource information indicates N different resources, the N pieces of identification information indicate the N downlink path loss reference signals, and the N sets of resource information correspond to the N pieces of identification information.
  • the sending module 902 is also configured to send fourth information.
  • the communication device 900 can be applied to terminal equipment.
  • the receiving module 901 is used to receive N repetition factors. Each repetition factor indicates the number of orthogonal frequency division multiplexing OFDM symbols used by the terminal equipment when transmitting the uplink reference signal.
  • the N repetition factors and N downlink path losses Reference signal correspondence; the receiving module 901 is also used to: receive the N downlink path loss reference signals; the processing module 903 is used to determine the transmit power corresponding to each of the N path loss reference signals ; The processing module 903 is also configured to: according to the first transmission power corresponding to each downlink path loss reference signal in the first i-1 downlink path loss reference signals and the first transmission power corresponding to the i-th downlink path loss reference signal , determine the second transmit power corresponding to each of the K OFDM symbols indicated by the i-th repetition factor corresponding to the i-th downlink path loss reference signal, i is taken from 1 to N, and K is a positive integer; the sending module 902: Use the second transmit power to send the uplink reference signal on each OFDM symbol.
  • the sum of the K second transmit powers corresponding to the K OFDM symbols is the same as the first transmit power corresponding to the i-th path loss reference signal.
  • the sum of the K second transmit powers corresponding to the K OFDM symbols is the same as the target transmit power, and the target transmit power is the first transmit power corresponding to the i-th path loss reference signal. 2 times the transmit power.
  • the communication device 900 can be applied to network equipment.
  • the sending module 902 is used to send N repetition factors.
  • Each repetition factor indicates the number of orthogonal frequency division multiplexing OFDM symbols used by the terminal equipment when sending the uplink reference signal.
  • the N repetition factors are related to the N downlink path losses. Reference signal correspondence; the sending module 902 is also used to send the N downlink path loss reference signals; the receiving module 901 is used to receive the uplink reference signal sent by the terminal device on each OFDM symbol.
  • Figure 10 is a schematic structural diagram of a communication device provided by another embodiment of the present application.
  • the device shown in Figure 10 can be used to perform the method described in any of the aforementioned embodiments.
  • the device 1000 in this embodiment includes: a memory 1001, a processor 1002, a communication interface 1003 and a bus 1004.
  • the memory 1001, the processor 1002, and the communication interface 1003 implement communication connections between each other through the bus 1004.
  • the memory 1001 may be a read only memory (ROM), a static storage device, a dynamic storage device or a random access memory (RAM).
  • the memory 1001 can store a program. When the program stored in the memory 1001 is executed by the processor 1002, the processor 1002 is used to execute various steps of the methods shown in Figures 3 to 8.
  • the processor 1002 may be a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for executing related programs to Implement the methods shown in Figures 3 to 8 of this application.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the processor 1002 may also be an integrated circuit chip with signal processing capabilities. During the implementation process, each step of the method shown in FIGS. 3 to 8 in the embodiment of the present application can be completed by instructions in the form of hardware integrated logic circuits or software in the processor 1002 .
  • the above-mentioned processor 1002 can also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA), or other processors.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • programmed logic devices discrete gate or transistor logic devices, discrete hardware components. Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed.
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other mature storage media in this field.
  • the storage medium is located in the memory 1001.
  • the processor 1002 reads the information in the memory 1001, and combines its hardware to complete the functions required to be performed by the units included in the device of the present application. For example, each step of the embodiment shown in Figures 3 to 8 can be executed. /Function.
  • the communication interface 1003 may use, but is not limited to, a transceiver device such as a transceiver to implement communication between the device 1000 and other devices or communication networks.
  • Bus 1004 may include a path that carries information between various components of device 1000 (eg, memory 1001, processor 1002, communication interface 1003).
  • the device 1000 shown in the embodiment of the present application may be an electronic device, or may also be a chip configured in the electronic device.
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination.
  • the above-described embodiments may 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 or computer programs. When the computer instructions or computer programs are loaded or executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmit to another website, computer, server or data center through wired (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that contains one or more sets of available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, tape), optical media (eg, DVD), or semiconductor media.
  • the semiconductor medium may be a solid state drive.
  • At least one refers to one or more, and “plurality” refers to two or more.
  • At least one of the following” or similar expressions thereof refers to any combination of these items, including any combination of a single item (items) or a plurality of items (items).
  • at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • Another point is that the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the device or unit may be electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • 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.
  • the technical solution of the present application is essentially or the part that contributes to the existing technology 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, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other various media that can store program codes.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente demande concerne un procédé et un appareil de communication. Dans la solution technique proposée dans la présente demande, après réception de N signaux de référence de perte de trajet de liaison descendante, un dispositif terminal détermine une première puissance de transmission et envoie des premières informations à un dispositif de réseau, la première puissance de transmission étant associée à une puissance de transmission correspondant à un ou plusieurs signaux de référence de perte de trajet de liaison descendante parmi M signaux de référence de perte de trajet de liaison descendante parmi les N signaux de référence de perte de trajet de liaison descendante, et les premières informations indiquant que des signaux de référence de liaison montante, qui correspondent aux M signaux de référence de perte de trajet de liaison descendante, sont envoyés sur une première ressource; et de manière correspondante, le dispositif de réseau peut recevoir, en utilisant M points TRP correspondant aux M signaux de référence de perte de trajet de liaison descendante, les signaux de référence de liaison montante envoyés sur la première ressource d'un terminal en utilisant la première puissance de transmission. Le procédé de communication selon la présente demande permet de résoudre le problème de la puissance qui n'est pas uniforme lorsqu'un dispositif terminal envoie des signaux SRS à différents points TRP et le problème de la consommation d'énergie élevée du dispositif terminal.
PCT/CN2023/110042 2022-08-12 2023-07-28 Procédé et appareil de communication WO2024032396A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110536394A (zh) * 2019-03-29 2019-12-03 中兴通讯股份有限公司 功率控制方法、装置和系统
WO2021026683A1 (fr) * 2019-08-09 2021-02-18 Lenovo (Beijing) Limited Commande de puissance pour transmissions de pucch à multiples trps
US20220030521A1 (en) * 2020-07-23 2022-01-27 Comcast Cable Communications, Llc Power Control in Wireless Communications
WO2022067823A1 (fr) * 2020-09-30 2022-04-07 华为技术有限公司 Procédé et dispositif de commande de puissance de liaison montante

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110536394A (zh) * 2019-03-29 2019-12-03 中兴通讯股份有限公司 功率控制方法、装置和系统
WO2021026683A1 (fr) * 2019-08-09 2021-02-18 Lenovo (Beijing) Limited Commande de puissance pour transmissions de pucch à multiples trps
US20220030521A1 (en) * 2020-07-23 2022-01-27 Comcast Cable Communications, Llc Power Control in Wireless Communications
WO2022067823A1 (fr) * 2020-09-30 2022-04-07 华为技术有限公司 Procédé et dispositif de commande de puissance de liaison montante

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