WO2021031826A1 - Procédé de commande de puissance de canal de rétroaction de liaison latérale physique, et terminal - Google Patents

Procédé de commande de puissance de canal de rétroaction de liaison latérale physique, et terminal Download PDF

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Publication number
WO2021031826A1
WO2021031826A1 PCT/CN2020/106183 CN2020106183W WO2021031826A1 WO 2021031826 A1 WO2021031826 A1 WO 2021031826A1 CN 2020106183 W CN2020106183 W CN 2020106183W WO 2021031826 A1 WO2021031826 A1 WO 2021031826A1
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WIPO (PCT)
Prior art keywords
power
psfch
receiving terminal
terminal
transmission power
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PCT/CN2020/106183
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English (en)
Chinese (zh)
Inventor
姜炜
纪子超
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维沃移动通信有限公司
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Publication of WO2021031826A1 publication Critical patent/WO2021031826A1/fr

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    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/248—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where transmission power control commands are generated based on a path parameter

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a power control method and terminal for a physical side link feedback channel.
  • the sidelink transmission in the related technology is mainly divided into broadcast (broadcast), multicast (groupcast) and unicast (unicast) several transmission forms.
  • multicast communication it is a one-to-many communication mode.
  • HARQ hybrid automatic repeat request
  • the HARQ feedback of the receiving terminal is sent on the physical side link feedback channel PSFCH.
  • PSFCH physical side link feedback channel
  • the embodiments of the present disclosure provide a power control method and a terminal for a physical side link feedback channel, so as to solve the problem that the transmission power of the PSFCH cannot be determined in related technologies.
  • embodiments of the present disclosure provide a power control method for a physical side link feedback channel, which is applied to a receiving terminal, and includes:
  • the transmission power of the receiving terminal on the physical side link feedback channel PSFCH is determined.
  • embodiments of the present disclosure also provide a terminal, where the terminal is a receiving terminal and includes:
  • the first obtaining module is configured to obtain the first distance between the receiving terminal and the sending terminal;
  • the first determining module is configured to determine the transmission power of the receiving terminal on the physical side link feedback channel PSFCH according to the first distance.
  • embodiments of the present disclosure provide a terminal, including: a memory, a processor, and a computer program stored in the memory and capable of running on the processor.
  • the computer program implements the aforementioned physical Steps of the power control method of the side link feedback channel.
  • embodiments of the present disclosure also provide a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, the above-mentioned physical sidelink feedback channel is implemented. Steps of power control method.
  • the above scheme determines the transmission power of each receiving terminal on the PSFCH based on the distance between the receiving terminal and the transmitting terminal, ensuring that the transmitting terminal receives the feedback information of each receiving terminal on the PSFCH with similar power, thereby reducing interference and interference between UEs. IBE interference improves the success rate of receiving feedback information.
  • FIG. 1 shows one of the schematic flowcharts of the power control method of the physical side link feedback channel according to an embodiment of the present disclosure
  • FIG. 2 shows the second schematic flowchart of the power control method of the physical side link feedback channel according to an embodiment of the present disclosure
  • FIG. 3 shows the third schematic flowchart of the power control method of the physical side link feedback channel according to an embodiment of the present disclosure
  • FIG. 4 shows the fourth flowchart of the method for power control of the physical side link feedback channel according to an embodiment of the present disclosure
  • FIG. 5 shows a schematic diagram of modules of a terminal according to an embodiment of the present disclosure
  • Fig. 6 shows a structural block diagram of a terminal according to an embodiment of the present disclosure.
  • Sidelink refers to a link between user equipment (User Equipment, UE) and user equipment for direct data transmission without going through the network.
  • the sending UE sends sidelink control information (SCI) through PSCCH (Physical Sidelink Control Channel), and sends data through PSSCH (Physical Sidelink Shared Channel, physical sidelink data channel).
  • SCI sidelink control information
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel, physical sidelink data channel
  • the receiving UE demodulates the control information, and determines the size of the transmission block, modulation and coding method, allocated resources, etc. according to the demodulated control information, and the receiving UE then uses the above information on the corresponding time-frequency resources Receive data and demodulate.
  • the present disclosure provides a power control method and terminal for a physical side link feedback channel.
  • an embodiment of the present disclosure provides a power control method of a physical side link feedback channel, which is applied to a receiving terminal, and includes:
  • Step 101 Obtain a first distance between the receiving terminal and the sending terminal.
  • the first distance between the receiving terminal and the sending terminal is determined according to the location information of the receiving terminal and the location information of the sending terminal.
  • the sending terminal sends data to the receiving terminal through a Physical Sidelink Share Channel (PSSCH), and the location information of the sending terminal passes through the sidelink control information (Sidelink Control Information) carried in the PSSCH.
  • SCI indicates that the receiving terminal calculates the first distance between the receiving terminal and the sending terminal based on the received location information of the sending terminal and its own location information.
  • Step 102 Determine the transmit power of the receiving terminal on the physical side link feedback channel PSFCH according to the first distance.
  • the receiving terminal transmits the HARQ feedback corresponding to the PSSCH on the PSFCH, and the transmission power for transmitting the HARQ feedback is determined according to the first distance between the receiving terminal and the transmitting terminal, which can ensure the transmission
  • the terminal receives the feedback information of each receiving terminal on the PSFCH with similar power, thereby reducing interference between UEs and In-Band Emission (IBE) interference, and improving the success rate of receiving feedback information.
  • IBE In-Band Emission
  • the transmitting power of the receiving terminal on the PSFCH can be determined based on the mapping relationship between the distance between the receiving terminal and the transmitting terminal and the PSFCH transmitting power; it can also be determined by establishing the distance or the distance change value between the receiving terminal and the transmitting terminal,
  • the association relationship with the power adjustment candidate value is to adjust the transmission power of the PSFCH on the basis of the basic transmission power.
  • Manner 1 Determine the transmission power of the PSFCH based on the mapping relationship between the distance between the receiving terminal and the transmitting terminal and the PSFCH transmission power.
  • the step 102 includes:
  • Step 201 Obtain a mapping relationship between distance and PSFCH transmission power.
  • mapping relationship can be pre-defined by the protocol or pre-configured by the control node, such as the base station, the road side unit (RSU), the relay (relay), and the sidelink.
  • the control node such as the base station, the road side unit (RSU), the relay (relay), and the sidelink.
  • RSU road side unit
  • relay relay
  • sidelink A UE that controls other UEs, etc.
  • the mapping relationship between the distance and the PSFCH transmission power may be: the distance is linearly related to or proportional to the PSFCH transmission power; or, the distance within a length is mapped to one transmission power.
  • Step 202 Determine the first transmission power corresponding to the first distance according to the mapping relationship.
  • the receiving terminal determines the transmit power of the receiving terminal on the PSFCH according to the mapping relationship, first determine the first transmit power corresponding to the first distance according to the mapping relationship, and the first transmit power cannot be directly As the actual transmission power of PSFCH.
  • Step 203 Determine the transmission power of the receiving terminal on the PSFCH according to the first transmission power. Wherein, the transmitting power of the receiving terminal on the PSFCH is less than or equal to the maximum transmitting power of the receiving terminal.
  • the receiving terminal when determining the transmit power of the receiving terminal in the PSFCH according to the first transmit power, the receiving terminal also needs to determine the power adjustment window of the PSFCH, and according to the value range of the power adjustment window, And the first transmission power to determine the transmission power of the receiving terminal on the PSFCH.
  • a power adjustment window is associated for the transmission power of a PSFCH.
  • the range of the power adjustment window is [min_power (minimum power), max_power (maximum power)], and the receiving terminal adjusts the transmission power of this PSFCH within the power adjustment window.
  • the power adjustment window may be configured by the control node, or directly negotiated between the receiving terminal and the transmitting terminal, or defined by a protocol or pre-configured.
  • the control node is for example: a base station, RSU, relay, UE that controls other UEs on the sidelink, etc.; when the power adjustment window is directly negotiated between the receiving terminal and the sending terminal, the sending terminal uses SCI instructions or sidelink Radio Resource Control (Radio Resource Control, RRC) configuration.
  • RRC Radio Resource Control
  • the value range of the power adjustment window is determined according to the first information;
  • the first information includes at least one of the following: Quality of Service (QoS) requirements for transmission information, QoS requirements for feedback information, Interference environment (such as the degree of interference), working scenarios (such as urban areas, highways, etc.), link congestion, modulation and coding scheme (MCS) used for the associated PSSCH transmission, number of layers, UE capabilities, Historical hybrid automatic repeat request HARQ feedback information, PSFCH resource location, PSFCH format, terminal moving speed, and terminal moving direction.
  • QoS Quality of Service
  • MCS modulation and coding scheme
  • the size (length) of the power adjustment window can be fixed, for example, pre-defined by a protocol or determined by network pre-configuration; it can also be variable length, for example, according to QoS requirements (priority, communication range) (Or reliability, etc.) or dynamically adjust the size of the window associated with the MCS used for PSSCH transmission.
  • the value of the minimum value min_power of the power adjustment window may be fixed, for example, the default value of 0w; the value of min_power may also be variable, and min_power is not less than 0w.
  • the value range of the power adjustment window is determined according to the first information. For example, when the communication range of the service exceeds a preset value, max_power is equal to the maximum transmit power of the UE; or min_power may be related to the QoS of the service Related, for example, the higher the QoS priority, the greater the value of min_power; or, the min_power is related to the work scenario, such as: the min_power in the urban area is greater than the min_power of the expressway.
  • RSRP Reference signal receiving power
  • determining the transmission power of the receiving terminal on the PSFCH according to the value range of the power adjustment window and the first transmission power includes:
  • the first transmission power is the transmission power of the receiving terminal on the PSFCH; if the first transmission power is greater than the power adjustment The maximum value of the window, the maximum value is the transmit power of the receiving terminal on the PSFCH, where the maximum value is less than or equal to the maximum transmit power of the receiving terminal; if the first transmit power is less than the The minimum value of the power adjustment window, the minimum value is the transmit power of the receiving terminal on the PSFCH.
  • the terminal performs sidelink multicast communication, and the communication range of a certain multicast service is 400m.
  • the range of the power adjustment window of the PSFCH is determined to be [3dBm, 20dBm], which is approximately [0.005w, 0.1w].
  • the mapping relationship between the distance between the receiving terminal and the transmitting terminal and the PSFCH transmission power is linearly related, it is expressed as:
  • x represents the actual distance between the receiving terminal and the transmitting terminal
  • y represents the transmission power of the PSFCH
  • 0.2 is the maximum transmission power of the receiving terminal 0.2w, which is 23dBm
  • 500 is the cutoff point N of the distance between the receiving terminal and the transmitting terminal at the maximum transmission power.
  • UE2/UE3/UE4 is based on the position of UE1 in the SCI of this transmission According to the information and its own location information, the distances between UE1 and UE2/UE3/UE4 are 100m, 10m, and 600m, respectively.
  • UE2/UE3/UE4 calculates the PSFCH transmit power based on the distance and the above linear relationship:
  • the second way is to adjust the transmission power of the PSFCH on the basis of the basic transmission power by establishing the relationship between the distance between the receiving terminal and the transmitting terminal and the power adjustment candidate value.
  • the receiving terminal when determining the transmission power of the receiving terminal on the PSFCH, the receiving terminal also needs to determine the basic transmission power of the PSFCH.
  • the basic transmission power is determined according to the second information, and the second information includes at least one of the following: downlink path loss, side link path loss, reference signal received power RSRP, QoS requirement of transmission information, QoS of feedback information Requirements, interference environment, working scenarios, link congestion, the modulation and coding strategy MCS used for the associated PSSCH transmission, and the number of layers.
  • the basic transmission power is determined according to the second information, for example:
  • CSI-RS Channel State Information-Reference Signal
  • one or more MCS levels correspond to the basic transmission power of one PSFCH.
  • the step 102 includes:
  • Step 301 Determine a first power adjustment value of the PSFCH according to the first distance
  • the power adjustment candidate value may be configured by a control node (for example, a base station, RSU, relay, UE that controls other UEs on the sidelink, etc.), and may also be directly negotiated between the receiving terminal and the transmitting terminal (the transmitting terminal indicates through SCI or sidelink RRC configuration), or pre-defined or pre-configured by the protocol.
  • a control node for example, a base station, RSU, relay, UE that controls other UEs on the sidelink, etc.
  • the number (precision or granularity) of the power adjustment candidate values can be fixed, for example, determined by protocol definition or network configuration; it can also be variable, for example: Number (precision or granularity) and QoS requirements for transmission information, QoS requirements for feedback information (such as communication range, priority, or reliability, etc.), interference environment, working scenarios (such as urban areas or highways), and link congestion ( CBR (Channel busy ratio) or CR (Channel occupancy ratio, channel occupancy ratio) measurement results, etc.), MCS used for the associated PSSCH transmission, number of layers, UE capabilities, historical HARQ feedback information, PSFCH resource location, PSFCH At least one of the format, the speed of the terminal, the moving direction of the terminal, etc. is related.
  • the receiving terminal After determining the power adjustment candidate value, the receiving terminal obtains the association relationship between the distance and the power adjustment candidate value; the association relationship may be predefined or preconfigured by a protocol; according to the association relationship, the The first power adjustment value corresponding to the first distance is determined from the candidate power adjustment values.
  • Step 302 Based on the basic transmission power, determine the transmission power of the receiving terminal on the PSFCH according to the first power adjustment value.
  • the receiving terminal superimposes the first power adjustment value on the basis of the basic transmission power to obtain the actual transmission power of the PSFCH.
  • the distance between the receiving terminal and the transmitting terminal is relatively small, a negative adjustment value is selected as the first power adjustment value, and the determined first power adjustment value ( The smaller the distance, the smaller the PSFCH transmission power), which is the PSFCH transmission power of the receiving terminal.
  • the transmit power of the receiving terminal on the PSFCH is less than or equal to the maximum transmit power of the receiving terminal.
  • the terminal performs sidelink multicast communication, and the communication range of a certain multicast service is 500m.
  • the relationship between the distance between the receiving terminal and the transmitting terminal and the power adjustment candidate value is as follows:
  • the distance between the receiving terminal and the transmitting terminal (0, 100m) corresponds to the power adjustment value -3dB;
  • the distance between the receiving terminal and the transmitting terminal (100, 200m) corresponds to the power adjustment value -1dB;
  • the distance between the receiving terminal and the transmitting terminal (200, 300m) corresponds to the power adjustment value +1dB;
  • the distance between the receiving terminal and the transmitting terminal corresponds to the power adjustment value +3dB;
  • the distance between the receiving terminal and the transmitting terminal corresponds to the power adjustment value +5dB.
  • UE2/UE3/UE4 is based on the position of UE1 in the SCI of this transmission According to the information and its own location information, the distances between UE1 and UE2/UE3/UE4 are 230m, 10m, and 460m, respectively.
  • UE2/UE3/UE4 determines the basic transmission power of PSFCH to be 17dBm based on the MCS level of the associated PSSCH service.
  • UE2/UE3/UE4 determine the PSFCH transmission power based on the distance and the above-mentioned association relationship: add the corresponding PSFCH power adjustment value to the PSFCH basic transmission power:
  • Manner 3 Adjust the transmission power of the PSFCH on the basis of the basic transmission power by establishing the relationship between the change value of the distance between the receiving terminal and the transmitting terminal and the power adjustment candidate value.
  • the receiving terminal when determining the transmitting power of the receiving terminal on the PSFCH, the receiving terminal needs to obtain the second transmitting power of the receiving terminal on the PSFCH during the last side link communication.
  • the receiving terminal will record the last transmission power on the same PSFCH link, and the second transmission power is: relative to the current moment, the receiving terminal was on the PSFCH during the last multicast communication. Transmit power. It should be noted that if the time interval between this transmission and the previous transmission exceeds a timer of length N, it is considered that there is no second transmission power of the PSFCH during the last multicast communication, and the receiving terminal will not Use this method to determine the transmit power of the currently transmitted PSFCH.
  • the step 102 includes:
  • Step 401 Determine a second power adjustment value of the PSFCH according to the first distance.
  • the power adjustment candidate value may be configured by the control node, directly negotiated between the receiving terminal and the transmitting terminal, or pre-defined or pre-configured by a protocol.
  • the number (precision or granularity) of the power adjustment candidate values may be fixed or variable. It should be noted that the attributes and configuration methods of the power adjustment candidate values are the same as those in the second manner, and will not be repeated here to avoid repetition.
  • the receiving terminal determines the second power adjustment value of the PSFCH, it also needs to obtain the association relationship between the change value of the distance between the receiving terminal and the transmitting terminal and the power adjustment candidate value, and the association relationship may be Pre-defined or pre-configured for the protocol; specifically, the receiving terminal can calculate the distance between the sending and receiving ends based on the location information of the sending terminal and its own location information. For multiple multicast communications, the receiving terminal will record the distance between the sending and receiving ends of the last multicast communication , So as to obtain the change value of the distance between the receiving and sending end.
  • the receiving terminal obtains the first change value of the distance from the previous side link communication to the current side link communication, and determines that the first change value corresponds to the power adjustment candidate value according to the association relationship The second power adjustment value.
  • Step 402 Based on the second transmission power, determine the transmission power of the receiving terminal on the PSFCH according to the second power adjustment value.
  • the receiving terminal uses the second transmission power as a basic value for adjusting the transmission power of the PSFCH to obtain the actual transmission power of the PSFCH. It should be noted that the transmit power of the receiving terminal on the PSFCH is less than or equal to the maximum transmit power of the receiving terminal.
  • a power boost value of X dB may be superimposed on the determined transmit power.
  • the receiving terminal obtains the power boost value of the PSFCH; and superimposes the power boost value on the transmission power of the PSFCH.
  • the value X dB of the power boost value may be pre-defined or pre-configured by the protocol, for example, configured by the control node.
  • the above embodiment is a method for determining the transmission power of a receiving terminal on the PSFCH of a transmitting terminal.
  • the actual transmitting power of the receiving terminal on the PSFCH for each transmitting terminal needs to be further determined.
  • the method further includes:
  • the method of proportional reduction may be based on the ratio of the distance between the receiving terminal and each transmitting terminal.
  • the distances between the receiving terminal and the transmitting terminal of 4 PSFCH links are 100, 150, 150, and 200 meters.
  • PSFCH link 1 if the distance is 100 meters, the actual transmission power of the PSFCH is 100/(100+150+150+200)*0.2, which is approximately equal to 0.03334 watts, that is, 15.23 dBm.
  • the method of proportional reduction may be: the ratio of the transmission power calculated based on each PSFCH link.
  • the calculated transmit power of the 4 PSFCH links are 20, 15, 15 and 20 dBm respectively.
  • the transmission power of the PSFCH link is 20dBm
  • the actual transmission power of the PSFCH is 0.1/(0.1+0.032+0.032+0.1)*0.2, which is approximately equal to 0.076 watts, that is, 18.8dBm.
  • the method further includes:
  • the transmission power is allocated to the multiple PSFCHs according to the third information; the sum of the transmission powers of the multiple PSFCHs is less than or equal to the maximum transmission power of the receiving terminal.
  • the third information includes at least one of the following: quality of service QoS requirements of transmission information, QoS requirements of feedback information, link congestion, modulation and coding strategy MCS used for associated PSSCH transmission, number of layers, historical hybrid automatic retransmission Request HARQ feedback information and the distance between the receiving terminal and the sending terminal.
  • power allocation is performed according to at least one item in the third information, and the receiving terminal is in the PSFCH
  • the total transmission power of is not greater than the maximum transmission power of the receiving terminal.
  • Allocate transmission power to multiple PSFCHs according to the third information for example, priority is given to PSFCHs with high service priority; or, priority is given to PSFCHs with a short distance between the receiving terminal and the sending terminal; Or, preferentially allocate power to the PSFCH with high service reliability requirements.
  • the method further includes: acquiring PSFCH resources in one of the following ways, that is, determining the sending location of the feedback information of the receiving terminal:
  • the receiving terminal obtains the PSFCH resource through resource sensing or reservation;
  • the control node may be a base station, RSU, Relay, UE that controls other UEs on the sidelink, etc.;
  • the transmit power of the automatic gain control AGC symbol is the same as the transmit power of the receiving terminal on the PSFCH; or, the transmit power of the AGC symbol is the same as the transmit power of the receiving terminal on the PSFCH.
  • the difference in transmit power belongs to the preset range.
  • AGC Automatic Generation Control
  • the transmitting power of each receiving terminal on the PSFCH is controlled based on the distance between the receiving terminal and the transmitting terminal, to ensure that the transmitting terminal receives the feedback information of each receiving terminal on the PSFCH with similar power , Thereby reducing interference between UEs and IBE interference, and improving the success rate of receiving feedback information.
  • an embodiment of the present disclosure provides a terminal 500.
  • the terminal is a receiving terminal and includes:
  • the first obtaining module 501 is configured to obtain the first distance between the receiving terminal and the sending terminal;
  • the first determining module 502 is configured to determine the transmission power of the receiving terminal on the physical side link feedback channel PSFCH according to the first distance.
  • the first determining module 502 includes:
  • the first acquiring unit is configured to acquire the mapping relationship between distance and PSFCH transmission power
  • a first determining unit configured to determine the first transmission power corresponding to the first distance according to the mapping relationship
  • a second determining unit configured to determine the transmission power of the receiving terminal on the PSFCH according to the first transmission power
  • the transmitting power of the receiving terminal on the PSFCH is less than or equal to the maximum transmitting power of the receiving terminal.
  • the terminal further includes:
  • the second determining module is configured to determine the power adjustment window of the PSFCH
  • the second determining unit includes:
  • the first determining subunit is configured to determine the transmission power of the receiving terminal on the PSFCH according to the value range of the power adjustment window and the first transmission power.
  • the value range of the power adjustment window is determined according to first information;
  • the first information includes at least one of the following:
  • the quality of service QoS requirements of the transmission information The quality of service QoS requirements of the transmission information, the QoS requirements of the feedback information, the interference environment, the working scenario, the link congestion, the modulation and coding strategy used for the PSSCH transmission of the associated physical sidelink data channel, MCS, the number of layers, and the user equipment UE capability , Historical hybrid automatic repeat request HARQ feedback information, PSFCH resource location, PSFCH format, terminal's moving speed and terminal's moving direction.
  • first determining subunit is specifically configured to:
  • the first transmission power is the transmission power of the receiving terminal on the PSFCH
  • the maximum value is the transmit power of the receiving terminal on the PSFCH, where the maximum value is less than or equal to the maximum transmit power of the receiving terminal power;
  • the minimum value is the transmission power of the receiving terminal on the PSFCH.
  • the terminal further includes:
  • the third determining module is used to determine the basic transmission power of the PSFCH
  • the first determining module 502 includes:
  • a third determining unit configured to determine the first power adjustment value of the PSFCH according to the first distance
  • a fourth determining unit configured to determine the transmission power of the receiving terminal on the PSFCH according to the first power adjustment value on the basis of the basic transmission power
  • the transmitting power of the receiving terminal on the PSFCH is less than or equal to the maximum transmitting power of the receiving terminal.
  • the basic transmission power is determined according to second information, and the second information includes at least one of the following:
  • Downlink path loss, sidelink path loss, reference signal received power RSRP, QoS requirements for transmission information, QoS requirements for feedback information, interference environment, working scenarios, link congestion, and associated physical sidelink data channel PSSCH The modulation and coding strategy MCS used for transmission and the number of layers.
  • the third determining unit includes:
  • the second determining subunit is used to determine the power adjustment candidate value of the PSFCH
  • the first obtaining subunit is configured to obtain the association relationship between the distance and the power adjustment candidate value
  • the third determining subunit is configured to determine the first power adjustment value corresponding to the first distance from the power adjustment candidate values according to the association relationship.
  • the terminal further includes:
  • the second acquisition module is configured to acquire the second transmission power of the receiving terminal in the PSFCH during the last sidelink communication
  • the first determining module 502 includes:
  • a fifth determining unit configured to determine a second power adjustment value of the PSFCH according to the first distance
  • a sixth determining unit configured to determine the transmission power of the receiving terminal on the PSFCH according to the second power adjustment value on the basis of the second transmission power
  • the transmitting power of the receiving terminal on the PSFCH is less than or equal to the maximum transmitting power of the receiving terminal.
  • the fifth determining unit includes:
  • the fourth determining subunit is used to determine the power adjustment candidate value of the PSFCH
  • the second acquiring subunit is configured to acquire the correlation between the change value of the distance between the receiving terminal and the transmitting terminal and the power adjustment candidate value;
  • the third acquiring subunit is configured to acquire the first change value of the distance from the previous side link communication to the current side link communication;
  • the fifth determining subunit is configured to determine a second power adjustment value corresponding to the first change value among the power adjustment candidate values according to the association relationship.
  • the terminal further includes:
  • the third obtaining module is configured to obtain the sum of the PSFCH transmission power of the receiving terminal for multiple transmitting terminals when there are multiple transmitting terminals;
  • the first processing module is configured to reduce the transmission power of multiple PSFCHs when the sum of the transmission power is greater than the maximum transmission power of the receiving terminal.
  • the terminal further includes:
  • the second processing module is configured to allocate transmission power to the multiple PSFCHs according to the third information when there are multiple transmitting terminals;
  • the sum of the transmission power of the multiple PSFCHs is less than or equal to the maximum transmission power of the receiving terminal.
  • the third information includes at least one of the following:
  • the quality of service QoS requirements of the transmission information The quality of service QoS requirements of the transmission information, the QoS requirements of the feedback information, the link congestion, the modulation and coding strategy MCS used for the PSSCH transmission of the associated physical sidelink data channel, the number of layers, the historical hybrid automatic repeat request HARQ feedback information, and The distance between the receiving terminal and the sending terminal.
  • the terminal further includes:
  • the fourth obtaining module is configured to obtain the power boost value of the PSFCH
  • the third processing module is configured to superimpose the power boost value on the transmission power of the PSFCH.
  • the terminal further includes:
  • the fifth acquisition module is used to acquire PSFCH resources in one of the following ways:
  • the receiving terminal obtains the PSFCH resource through resource sensing or reservation;
  • the transmit power of the automatic gain control AGC symbol is the same as the transmit power of the receiving terminal on the PSFCH; or, the transmit power of the AGC symbol is the same as the transmit power of the receiving terminal on the PSFCH.
  • the difference in transmit power belongs to the preset range.
  • this terminal embodiment is a terminal corresponding to the power control method of the physical sidelink feedback channel applied to the receiving terminal. All the implementation modes of the above embodiment are applicable to the terminal embodiment, and can also To achieve the same technical effect.
  • an embodiment of the present disclosure further provides a terminal, where the terminal is a receiving terminal and includes a processor, a memory, a computer program stored in the memory and running on the processor, and the computer program is
  • the terminal is a receiving terminal and includes a processor, a memory, a computer program stored in the memory and running on the processor, and the computer program is
  • FIG. 6 is a schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present disclosure, and the terminal is a receiving terminal.
  • the terminal 60 includes but is not limited to: a radio frequency unit 610, a network module 620, an audio output unit 630, an input unit 640, a sensor 650, a display unit 660, a user input unit 670, an interface unit 680, a memory 690, a processor 611, and a power supply 612 and other components.
  • a radio frequency unit 610 includes but is not limited to: a radio frequency unit 610, a network module 620, an audio output unit 630, an input unit 640, a sensor 650, a display unit 660, a user input unit 670, an interface unit 680, a memory 690, a processor 611, and a power supply 612 and other components.
  • terminal structure shown in FIG. 6 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange different components.
  • terminals include, but are not limited to, mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-
  • the processor 611 is configured to obtain the first distance between the receiving terminal and the sending terminal;
  • the transmission power of the receiving terminal on the physical side link feedback channel PSFCH is determined.
  • the radio frequency unit 610 can be used for receiving and sending signals in the process of sending and receiving information or talking. Specifically, after receiving the downlink data from the network side device, it is processed by the processor 611; , Send the uplink data to the network side device.
  • the radio frequency unit 610 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the radio frequency unit 610 can also communicate with the network and other devices through a wireless communication system.
  • the terminal provides users with wireless broadband Internet access through the network module 620, such as helping users to send and receive emails, browse web pages, and access streaming media.
  • the audio output unit 630 may convert the audio data received by the radio frequency unit 610 or the network module 620 or stored in the memory 690 into audio signals and output them as sounds. Moreover, the audio output unit 630 may also provide audio output related to a specific function performed by the terminal 60 (for example, call signal reception sound, message reception sound, etc.).
  • the audio output unit 630 includes a speaker, a buzzer, a receiver, and the like.
  • the input unit 640 is used to receive audio or video signals.
  • the input unit 640 may include a graphics processing unit (GPU) 641 and a microphone 642.
  • the graphics processor 641 responds to still pictures or video images obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. Data is processed.
  • the processed image frame may be displayed on the display unit 660.
  • the image frame processed by the graphics processor 641 may be stored in the memory 690 (or other storage medium) or sent via the radio frequency unit 610 or the network module 620.
  • the microphone 642 can receive sound, and can process such sound into audio data.
  • the processed audio data can be converted into a format that can be sent to the mobile communication network side device via the radio frequency unit 610 for output in the case of a telephone call mode.
  • the terminal 60 also includes at least one sensor 650, such as a light sensor, a motion sensor, and other sensors.
  • the light sensor includes an ambient light sensor and a proximity sensor.
  • the ambient light sensor can adjust the brightness of the display panel 661 according to the brightness of the ambient light.
  • the proximity sensor can close the display panel 661 and/or when the terminal 60 is moved to the ear. Or backlight.
  • the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when stationary, and can be used to identify terminal posture (such as horizontal and vertical screen switching, related games, Magnetometer attitude calibration), vibration recognition related functions (such as pedometer, percussion), etc.; sensor 650 can also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared Sensors, etc., will not be repeated here.
  • the display unit 660 is used to display information input by the user or information provided to the user.
  • the display unit 660 may include a display panel 661, and the display panel 661 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • the user input unit 670 can be used to receive inputted numeric or character information, and generate key signal inputs related to user settings and function control of the terminal.
  • the user input unit 670 includes a touch panel 671 and other input devices 672.
  • the touch panel 671 also called a touch screen, can collect user touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on the touch panel 671 or near the touch panel 671. operating).
  • the touch panel 671 may include two parts, a touch detection device and a touch controller.
  • the touch detection device detects the user's touch position, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 611, the command sent by the processor 611 is received and executed.
  • the touch panel 671 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave.
  • the user input unit 670 may also include other input devices 672.
  • other input devices 672 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackball, mouse, and joystick, which will not be repeated here.
  • the touch panel 671 can be covered on the display panel 661.
  • the touch panel 671 detects a touch operation on or near it, it transmits it to the processor 611 to determine the type of the touch event, and then the processor 611 responds to the touch
  • the type of event provides corresponding visual output on the display panel 661.
  • the touch panel 671 and the display panel 661 are used as two independent components to realize the input and output functions of the terminal, in some embodiments, the touch panel 671 and the display panel 661 may be integrated. Realize the input and output functions of the terminal, which are not limited here.
  • the interface unit 680 is an interface for connecting an external device with the terminal 60.
  • the external device may include a wired or wireless headset port, an external power source (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) port, video I/O port, headphone port, etc.
  • the interface unit 680 may be used to receive input (for example, data information, power, etc.) from an external device and transmit the received input to one or more elements in the terminal 60 or may be used to communicate between the terminal 60 and the external device. Transfer data between.
  • the memory 690 can be used to store software programs and various data.
  • the memory 690 may mainly include a program storage area and a data storage area.
  • the program storage area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data (such as audio data, phone book, etc.) created by the use of mobile phones.
  • the memory 640 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the processor 611 is the control center of the terminal. It uses various interfaces and lines to connect various parts of the entire terminal, and executes by running or executing software programs and/or modules stored in the memory 690, and calling data stored in the memory 690. Various functions of the terminal and processing data, so as to monitor the terminal as a whole.
  • the processor 611 may include one or more processing units; optionally, the processor 611 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface and application programs, etc.
  • the adjustment processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 611.
  • the terminal 60 may also include a power source 612 (such as a battery) for supplying power to various components.
  • a power source 612 such as a battery
  • the power source 612 may be logically connected to the processor 611 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system. And other functions.
  • the terminal 60 includes some functional modules not shown, which will not be repeated here.
  • the embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, each process of the embodiment of the power control method for the physical sidelink feedback channel is realized, And can achieve the same technical effect, in order to avoid repetition, I will not repeat them here.
  • the computer-readable storage medium such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
  • the network side equipment can be the base station (BTS) in Global System of Mobile Communications (GSM) or Code Division Multiple Access (CDMA), or it can be broadband code division multiple access.
  • the base station (NodeB, NB) in the address (Wideband Code Division Multiple Access, WCDMA) can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or in the future 5G network
  • the base stations, etc., are not limited here.
  • the method of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. ⁇
  • the technical solution of the present disclosure essentially or the part that contributes to the related technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk). ) Includes several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network side device, etc.) execute the method described in each embodiment of the present disclosure.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé de commande de la puissance d'un canal de rétroaction de liaison latérale physique, et sur un terminal. Le procédé de commande de la puissance d'un canal de rétroaction de liaison latérale physique consiste à : acquérir une première distance entre un terminal récepteur et un terminal émetteur ; et déterminer la puissance d'émission du terminal récepteur sur un canal de rétroaction de liaison latérale physique (PSFCH) en fonction de la première distance.
PCT/CN2020/106183 2019-08-21 2020-07-31 Procédé de commande de puissance de canal de rétroaction de liaison latérale physique, et terminal WO2021031826A1 (fr)

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