WO2019011089A1 - 一种功率控制方法和终端设备 - Google Patents

一种功率控制方法和终端设备 Download PDF

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Publication number
WO2019011089A1
WO2019011089A1 PCT/CN2018/090572 CN2018090572W WO2019011089A1 WO 2019011089 A1 WO2019011089 A1 WO 2019011089A1 CN 2018090572 W CN2018090572 W CN 2018090572W WO 2019011089 A1 WO2019011089 A1 WO 2019011089A1
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WIPO (PCT)
Prior art keywords
terminal device
power
data
power adjustment
information
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PCT/CN2018/090572
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English (en)
French (fr)
Inventor
鲁振伟
刘德平
高磊
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18831759.8A priority Critical patent/EP3637876A4/en
Priority to BR112020000374-3A priority patent/BR112020000374A2/pt
Publication of WO2019011089A1 publication Critical patent/WO2019011089A1/zh
Priority to US16/739,699 priority patent/US10945222B2/en

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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
    • H04W52/38—TPC being performed in particular situations
    • H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
    • 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
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/225—Calculation of statistics, e.g. average, variance
    • 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
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/226—TPC being performed according to specific parameters taking into account previous information or commands using past references to control power, e.g. look-up-table
    • 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
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • 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
    • H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • 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
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/265—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
    • 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
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • 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
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path

Definitions

  • Embodiments of the present application relate to communication systems, and in particular, to a power control method and a terminal device.
  • V2I/N Vehicle to Infrastructure/Network
  • V2X Vehicle to Infrastructure/Network
  • the transmitting device sends data directly to the receiving device.
  • the power of the transmitting device is based on the maximum sending power of the sending device, the number of resource blocks used by the sending device to send the data, and the sending device.
  • the estimated path loss and other factors are determined.
  • the method for determining the transmission power of the data transmitted by the transmitting device is relatively fixed, and the transmission power of the transmitting device cannot be flexibly and accurately controlled. Therefore, there is a need in the industry for a more flexible and accurate power control method.
  • Embodiments of the present application provide a power control method and a terminal device, which are capable of implementing more flexible and accurate power control in V2X communication.
  • the first aspect provides a power control method, including: the first terminal device sends the first data and the first side row control information corresponding to the first data to the at least one second terminal device; the first terminal device The at least one second terminal device receives at least one power adjustment information, the at least one power adjustment information being that the at least one second terminal device according to at least one of the first data and the first side line control information Determining; the first terminal device determines a transmit power of the second data according to the at least one power adjustment information; the first terminal device sends the second to the at least one second terminal device by using the transmit power data.
  • the at least one second terminal device Determining, by the at least one second terminal device, power adjustment information according to at least one of data and control information received from the first terminal device to the first terminal device, where the first terminal device adjusts the power according to the power transmitted by the at least one second terminal device
  • the transmit power of the second data to be sent is determined, that is, the first terminal device can adjust the power of the transmit data according to the feedback of the receiving end, thereby improving power control flexibility and accuracy.
  • the determining, by the first terminal device, the transmit power of the second data according to the at least one power adjustment information comprises: the first terminal device according to the maximum value and the minimum value of the at least one power adjustment information At least one of a value, an average value, a median value, a mode value, a quartile value, a geometric mean value, and a harmonic mean value determines a first power adjustment value; the first terminal device determines the first power adjustment value according to the first power adjustment value The transmission power of the second data.
  • the at least one power adjustment information is determined by the at least one second terminal device according to at least one of the first data and the first side line control information, including: The at least one power adjustment information is determined by the at least one second terminal device according to a measurement of at least one of the first data and the first side-line control information, the measurement comprising a reference signal received power RSRP measurement, At least one of a reference signal reception quality RSRQ measurement and a received signal strength indication RSSI measurement.
  • the at least one second terminal device determines the power adjustment information by measuring the first data and the first side-line control information, that is, the power adjustment information is obtained by the measurement of the signal actually received by the at least one second terminal device, thereby improving the power adjustment. Accuracy.
  • the at least one power adjustment information is determined by the at least one second terminal device according to at least one of the first data and the first side line control information, including: The at least one power adjustment information is determined according to the power indication information sent by the first terminal device, where the power indication information is included in the first data or included in the first side line control information, the power The indication information is used to indicate a transmission power of at least one of the first data and the first side line control information.
  • Determining the power adjustment information according to the power indication information sent by the first terminal device by the at least one second terminal device may simplify the method for the second terminal device to determine the power adjustment information.
  • the power adjustment information is used to indicate at least one of power increase, decrease, or constant.
  • the first terminal device receives a path loss related parameter from the at least one second terminal device, where the path loss related parameter is used by the first terminal device to determine the second data.
  • the path loss related parameter may be the transmission power of the at least one second terminal device, or the at least one second terminal device to the first terminal device and the at least one second terminal device Estimated value of the path loss.
  • the second aspect provides a first terminal device, including: a sending unit, configured to send first data and first side row control information corresponding to the first data to at least one second terminal device; and a receiving unit, configured to: Receiving, by the at least one second terminal device, at least one power adjustment information, wherein the at least one power adjustment information is that the at least one second terminal device is configured according to at least one of the first data and the first side line control information a determining unit, configured to determine, according to the at least one power adjustment information, a transmit power of the second data, where the sending unit sends the second data to the at least one second terminal device by using the transmit power.
  • the at least one second terminal device Determining, by the at least one second terminal device, power adjustment information according to at least one of data and control information received from the first terminal device to the first terminal device, where the first terminal device adjusts the power according to the power transmitted by the at least one second terminal device
  • the transmit power of the second data to be sent is determined, that is, the first terminal device can adjust the power of the transmit data according to the feedback of the receiving end, thereby improving power control flexibility and accuracy.
  • the determining unit determines, according to the at least one power adjustment information, the transmit power of the second data, the determining unit, according to the maximum value, the minimum value, and the average value of the at least one power adjustment information. Determining, by the at least one of a median value, a mode value, a quartile value, a geometric mean value, and a harmonic mean value, a first power adjustment value; the determining unit determining a transmit power of the second data according to the first power adjustment value .
  • the at least one power adjustment information is determined by the at least one second terminal device according to at least one of the first data and the first side line control information, including: The at least one power adjustment information is determined by the at least one second terminal device according to a measurement of at least one of the first data and the first side-line control information, the measurement comprising a reference signal received power RSRP measurement, At least one of a reference signal reception quality RSRQ measurement and a received signal strength indication RSSI measurement.
  • the at least one second terminal device determines the power adjustment information by measuring the first data and the first side-line control information, that is, the power adjustment information is obtained by the measurement quantity of the signal actually received by the at least one second terminal device, thereby improving the power adjustment. Accuracy.
  • the at least one power adjustment information is determined by the at least one second terminal device according to at least one of the first data and the first side line control information, including: The at least one power adjustment information is determined according to the power indication information sent by the sending unit, where the power indication information is included in the first data or included in the first side line control information, the power indication information Transmitting power for indicating at least one of the first data and the first side line control information.
  • Determining the power adjustment information according to the power indication information sent by the first terminal device by the at least one second terminal device may simplify the method for the second terminal device to determine the power adjustment information.
  • the power adjustment information is used to indicate at least one of power increase, decrease, or constant.
  • the first terminal device receives a path loss related parameter from the at least one second terminal device, where the path loss related parameter is used by the first terminal device to determine the second data.
  • the path loss related parameter may be the transmission power of the at least one second terminal device, or the at least one second terminal device to the first terminal device and the at least one second terminal device Estimated value of the path loss.
  • the transmitting unit may be a transmitter or a transceiver
  • the processing unit may be a processor
  • the receiving unit may be a receiver or a transceiver
  • a third aspect of the present invention provides a power control method, including: receiving, by a second terminal device, first data and first side line control information corresponding to the first data from a first terminal device; At least one of the first data and the first side line control information determines power adjustment information; the second terminal device sends the power adjustment information to the first terminal device, the power adjustment information being used for the The first terminal device determines the transmission power of the second data.
  • the at least one second terminal device Determining, by the at least one second terminal device, power adjustment information according to at least one of data and control information received from the first terminal device to the first terminal device, where the first terminal device adjusts the power according to the power transmitted by the at least one second terminal device
  • the transmit power of the second data to be sent is determined, that is, the first terminal device can adjust the power of the transmit data according to the feedback of the receiving end, thereby improving power control flexibility and accuracy.
  • the second terminal device determines the power adjustment information according to the at least one of the first data and the first side line control information, including: the second terminal device according to the The measurement of at least one of the first data and the first side-line control information determines the power adjustment information, the measurement including reference signal received power RSRP measurement, reference signal received quality RSRQ measurement, and received signal strength indication RSSI measurement At least one of them.
  • the at least one second terminal device determines the power adjustment information by measuring the first data and the first side-line control information, that is, the power adjustment information is obtained by the measurement quantity of the signal actually received by the at least one second terminal device, thereby improving the power adjustment. Accuracy.
  • the second terminal device determines the power adjustment information according to the at least one of the first data and the first side line control information, including: the second terminal device according to the The power indication information received by the first terminal device determines the power adjustment information, where the power indication information is included in the first data or included in the first side line control information, where the power indication information is used to indicate Transmit power of at least one of the first data and the first side line control information.
  • Determining the power adjustment information according to the power indication information sent by the first terminal device by the at least one second terminal device may simplify the method for the second terminal device to determine the power adjustment information.
  • the power adjustment information is used to indicate at least one of power increase, decrease, or constant.
  • the at least one second terminal device sends a path loss related parameter to the first terminal device, where the path loss related parameter is used by the first terminal device to determine the second data.
  • the path loss related parameter may be the transmission power of the at least one second terminal device, or the at least one second terminal device to the first terminal device and the at least one second terminal device Estimated value of the path loss.
  • a second terminal device including: a receiving unit, configured to receive, by the first terminal device, first data and first side row control information corresponding to the first data, and a determining unit, configured to Determining, by the at least one of the first data and the first side line control information, power adjustment information; the sending unit, configured to send the power adjustment information to the first terminal device, where the power adjustment information is used by the The first terminal device determines the transmission power of the second data.
  • the at least one second terminal device Determining, by the at least one second terminal device, power adjustment information according to at least one of data and control information received from the first terminal device to the first terminal device, where the first terminal device adjusts the power according to the power transmitted by the at least one second terminal device
  • the transmit power of the second data to be sent is determined, that is, the first terminal device can adjust the power of the transmit data according to the feedback of the receiving end, thereby improving power control flexibility and accuracy.
  • the determining unit determines the power adjustment information according to at least one of the first data and the first side row control information, including: the determining unit according to the first data and The measurement of at least one of the first side line control information determines the power adjustment information, the measurement comprising at least one of a reference signal received power RSRP measurement, a reference signal received quality RSRQ measurement, and a received signal strength indicator RSSI measurement.
  • the at least one second terminal device determines the power adjustment information by measuring the first data and the first side-line control information, that is, the power adjustment information is obtained by the measurement quantity of the signal actually received by the at least one second terminal device, thereby improving the power adjustment. Accuracy.
  • the determining unit determines the power adjustment information according to at least one of the first data and the first side line control information, including: the determining unit according to the first terminal device Receiving, by the received power indication information, the power adjustment information, where the power indication information is included in the first data or included in the first side line control information, where the power indication information is used to indicate the first Transmit power of at least one of data and the first side line control information.
  • Determining the power adjustment information according to the power indication information sent by the first terminal device by the at least one second terminal device may simplify the method for the second terminal device to determine the power adjustment information.
  • the power adjustment information is used to indicate at least one of power increase, decrease, or constant.
  • the at least one second terminal device sends a path loss related parameter to the first terminal device, where the path loss related parameter is used by the first terminal device to determine the second data.
  • the path loss related parameter may be the transmission power of the at least one second terminal device, or the at least one second terminal device to the first terminal device and the at least one second terminal device Estimated value of the path loss.
  • the transmitting unit may be a transmitter or a transceiver
  • the processing unit may be a processor
  • the receiving unit may be a receiver or a transceiver
  • an embodiment of the present application provides a chip for executing the program designed in the above aspect.
  • an embodiment of the present application provides a computer storage medium for storing computer software instructions used by the terminal device, which includes a program designed to perform the above aspects.
  • FIG. 1 is a schematic diagram of unicast or multicast communication in V2X communication according to an embodiment of the present application.
  • FIG. 2 is a flow chart of a power control method in accordance with an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a power control method according to an embodiment of the present application.
  • FIG. 4 is a terminal device according to an embodiment of the present application.
  • FIG. 5 is another terminal device according to an embodiment of the present application.
  • terminal 1 is a schematic diagram of unicast or multicast communication in V2X communication.
  • terminal 1 transmits its data to some terminal devices around it instead of transmitting to all terminal devices in its vicinity.
  • the terminal device 1 transmits multicast data to the terminal device 2, the terminal device 3, and the terminal device 4.
  • the multicast data may include, for example, speed information, location information, direction information, and the like of the terminal device 1.
  • the terminal device 1 can inform the remaining terminal devices 2 to 4 around the terminal device 1 in the form of direct communication, for assisting the remaining terminal devices 2 to 4 in making driving decisions, such as adjusting speed, position, and traveling direction. Etc., in order to improve the reliability and stability of the terminal during driving.
  • the terminal device 1 only needs to transmit data to one terminal around the terminal 1, for example, the terminal device 2, without transmitting data to the terminal device 3 or the terminal device 4.
  • the time-frequency resource in which the terminal device 1 transmits the unicast data to the terminal device 2 or the terminal device 1 transmits the multicast data to the terminal devices 2 to 4 may be allocated to the terminal device 1 by the access network device, or may be autonomous to the terminal device 1 Selected.
  • the access network device involved in the present application is a device deployed in a wireless access network to provide a wireless communication function for a terminal device.
  • the access network device may include various forms of base stations (BSs), such as macro base stations or micro base stations, relay stations or access points, and the like.
  • BSs base stations
  • the name of the device having the access network device function may be different, for example, it is an access network device in the fifth generation 5G network, and in the LTE network, It is an evolved Node B (referred to as an eNB or an eNodeB), and is called a Node B or the like in a third-generation 3G network, or a Road Side Unit (RSU) in V2V communication.
  • eNB evolved Node B
  • RSU Road Side Unit
  • the terminal device referred to in the present application may include various handheld devices having wireless communication functions, such as an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem, a mobile station (MS), Terminal or User Equipment (UE), etc.
  • MS mobile station
  • UE User Equipment
  • the above-mentioned devices are collectively referred to as terminal devices.
  • Step 21 The terminal device 1 sends, to the at least one second terminal device, first side control information (SCI) corresponding to the first data and the first data, where the at least one second terminal device is three
  • SCI side control information
  • the at least one second terminal device is three
  • at least one second terminal device may be one, two, three, and more.
  • the terminal device 2, the terminal device 3, and the terminal device 4 respectively receive first side line control information corresponding to the first data and the first data from the terminal device 1.
  • the first data sent by the terminal device 1 is determined by the application layer, for example, may include speed information, location information, and direction information of the terminal device 1, and the first side line control information includes at least a time frequency of transmitting the first data.
  • the resource indication information and the modulation and coding format of the first data are included in the application layer.
  • Step 22 The terminal device 2, the terminal device 3, and the terminal device 4 respectively determine power adjustment information according to at least one of the first data and the first side line control information.
  • the terminal device 2 may determine the power adjustment information 2 according to the first data or the first side line control information, and the terminal device 2 may also determine the power adjustment information 2 according to the first data and the first side line control information; the terminal device 3 may Determining the power adjustment information 3 according to the first data or the first side line control information, the terminal device 3 may also determine the power adjustment information 3 according to the first data and the first side line control information; the terminal device 4 may be based on the first data or the first The side line control information determines the power adjustment information 4, and the terminal device 4 can also determine the power adjustment information 4 based on the first data and the first side line control information.
  • the terminal device 2 may also determine the power adjustment information 2 according to the plurality of data and/or the plurality of side-line control information received from the terminal device 1, and the terminal device may further receive a plurality of data and/or received from the terminal device 1 according to the time period.
  • the plurality of side row control signals determine the power adjustment information 2. The same is true for the terminal devices 3 and 4 and will not be described again.
  • the terminal device 2 is taken as an example to describe how the terminal device determines the power adjustment information.
  • the terminal device 2 may determine the power adjustment according to at least one of a reference signal received power RSRP measurement, a reference signal received quality RSRQ measurement, and a received signal strength indicator RSSI measurement for at least one of the first data and the first side line control information.
  • Information 2 a possible implementation manner, when the measurement result is higher than or higher than the first threshold, determining that the power adjustment information 2 is to reduce power; when the measurement result is lower than or lower than the second threshold, then The power adjustment information 2 is determined to increase power; when the measurement result is other conditions, such as between the first threshold and the second threshold, the power does not change.
  • the first threshold and the second threshold may be the same.
  • the first threshold and the second threshold may be configured by the access network device and sent to the terminal device 1, or may be pre-configured, or specified in the protocol or standard.
  • the first threshold or the second threshold may be related to the distance between the terminal devices. If the distance between the terminal devices is different, different threshold values may be adopted.
  • the terminal device 2 can determine the distance from the terminal device 1 according to the geographical location information included in the data sent by the terminal device 1. When the distance is within the first distance range, the measurement corresponds to the first distance range. The first threshold or the second threshold is compared. When the distance is within the second distance, the first threshold or the second threshold corresponding to the second distance range is measured.
  • the power adjustment information indicates that the power is increased by 1 db, or is determined.
  • the power adjustment information indicates that the power is reduced by 1 db or the like, or the power adjustment information indicates that the power is unchanged.
  • the specific value of X can also be determined from the result of comparing the measurement result with the threshold value. If the power adjustment information indicates only three cases of power rise, fall, and change, the power adjustment information can be indicated by using 2 bits.
  • the power adjustment information may also indicate an increased power value or a reduced power value when the indicated power is increased or decreased, and at this time, the power adjustment information may be indicated using more bits.
  • the terminal device 2 may further determine the power adjustment information 2 according to the power indication information included in the first data or included in the first side row control information, where the power indication information is used to indicate the first data and the first The transmit power of at least one of the side line control information.
  • the terminal device 2 may determine the power adjustment information 2 based on the transmission power of at least one of the first data and the first side line control information.
  • the terminal device 2 may determine the power adjustment margin of the terminal device 1 according to the power control information, and further determine the power adjustment information 2, such as always selecting the smaller one of the power adjustment information and the power adjustment margin determined according to the measurement. Power adjustment information.
  • the power indication information herein may also be used to indicate a power adjustment margin of at least one of the first data and the first side line control information.
  • the terminal device 2 transmits the power adjustment information 2 to the terminal device 1, and the terminal device 3 transmits the power adjustment information 3 to the terminal device 1, and the terminal device 4 transmits the power adjustment information 4 to the terminal device 1, and the terminal device 1
  • the terminal device 2 receives the power adjustment information 2
  • the terminal device 1 receives the power adjustment information 3 from the terminal device 3
  • the terminal device 1 receives the power adjustment information 4 from the terminal device 4.
  • the respective power adjustment information sent by the terminal devices 2 to 4 to the terminal device 1 may be included in physical layer signaling such as SCI, or may be sent through other physical channels, such as a physical feedback channel, and may also be included in high layer signaling. Medium access control element (MAC Control Element, MAC CE).
  • MAC Control Element Medium access control element
  • the terminal device 2 will be described below as an example. If the power adjustment information is included in the SCI, the terminal device 1 may be sent to the terminal device 1 for a single SCI without corresponding data transmission, or may be included when the terminal device 2 transmits data to the
  • the terminal device 2 may also indicate power adjustment information of a plurality of other terminal devices in the SCI or the MAC CE. For example, the terminal device 2 receives the first data and the first side-line control information from the terminal device 1, and the terminal device 2 also receives the slave terminal device. Receiving the third data and the third control information, and then the terminal device 2 determines the power adjustment information 21 according to at least one of the first data and the first side line control information, and the terminal device 2 further according to the third data and the third At least one of the side line control information determines the power adjustment information 22, and the terminal device 2 includes the power adjustment information 21 and the power adjustment information 22 in the SCI or MAC CE.
  • the SCI or the MAC CE may indicate the power adjustment information 21 and the power adjustment information 22 by using 4 bits, for example, and the terminal device 2 may determine according to the sequence of other terminal devices in descending order (of course, in other orders).
  • the first 2 bits of the 4 bits are used to indicate the power adjustment information 22 of the terminal device 3, and the last two bits are used to indicate the power adjustment information 21 of the terminal device 1.
  • a plurality of bits may be included in the MAC CE to indicate IDs of a plurality of other terminal devices (eg, intra-group ID, UE ID, etc.) and power adjustment information corresponding to the plurality of other terminal devices.
  • the terminal device 2 For unicast communication, since the terminal device 2 only needs to transmit power adjustment information for the terminal device 1 of the terminal device 1, it is not necessary to consider the order of the terminal device 1.
  • the power adjustment information of the unicast communication and the multicast communication are transmitted through the SCI, a sufficient number of bits need to be reserved in the SCI for the transmission of the power adjustment information, for example, 10 bits of transmission power adjustment information are reserved. Then, the power adjustment information of five other terminal devices in the multicast communication can be transmitted, but in the case of unicast, only 2 of the 10 bits are used for transmitting the power adjustment information.
  • the power adjustment information of the unicast communication and the multicast communication are transmitted through the SCI, it can also be distinguished by different resources, such as the SCI under the unicast and the SCI under the multicast in the unicast resource and the resource. If the transmission is performed separately, the receiving terminal device can distinguish the unicast and multicast SCIs by using resources. In this case, the SCI can adopt different formats, such as different lengths.
  • the power adjustment information is transmitted through the SCI
  • the power adjustment information is transmitted through the MAC CE. For example, there are two cases in the SCI to indicate the increase, decrease, and invariance of the power adjustment information, and the remaining one is used to indicate that there are multiple power adjustment information transmitted at the MAC layer.
  • the terminal device 1 determines the transmission power of the second data according to the power adjustment information 2, the power adjustment information 3, and the power adjustment information 4.
  • the second data is data to be transmitted by the terminal device 1 to the terminal devices 2 to 4.
  • the second data may be determined by the application layer similarly to the first data, for example, including speed information, location information, and direction of the terminal device 1. Information, etc.
  • the terminal device 1 determines the transmission power of the second data according to the power adjustment information 2, the power adjustment information 3, and the power adjustment information 4, for example, the terminal device 1 may adjust the information according to the power, the power adjustment information 3, and the power adjustment information. At least one of the maximum value, the minimum value, the average value, the median value, the mode value, the quartile value, the geometric mean value, and the harmonic mean value of 4 determines the first power adjustment value, and the terminal device 1 adjusts according to the first power. The value determines the transmission power of the second data.
  • the power adjustment information 2 indicates that the transmission power of the terminal device 1 is increased by 3 db
  • the power adjustment information 3 indicates that the transmission power of the terminal device 1 is decreased by 1 db
  • the terminal device 1 determines a power adjustment value according to the power adjustment information 2 and the power adjustment information 3.
  • the transmission power of the second data may be expressed by the following formula, for example, the transmission power of the second data satisfies the following formula:
  • P PSSCH min ⁇ P CMAX,PSSCH ,10log 10 (M PSSCH )+P O_PSSCH + ⁇ PSSCH ⁇ PL+ ⁇ PSSCH ⁇ , or
  • P PSSCH min ⁇ P CMAX,PSSCH ,10log 10 (M PSSCH )+P O_PSSCH + ⁇ PSSCH ⁇ PL+f(i) ⁇ ,
  • f(i) f(i-1)+ ⁇ PSSCH
  • P PSSCH is the transmit power of the second data
  • P CMAX PSSCH is the maximum transmit power of the first terminal device
  • M PSSCH is the The first terminal device sends the number of physical resource blocks occupied by the second data
  • PL is the path loss estimated by the first terminal device
  • P O_PSSCH and ⁇ PSSCH are high-level parameters
  • ⁇ PSSCH is the first power adjustment value
  • the initial value of the f(i) is 0 or a preset value.
  • the above formula is just an example, and the transmission power of the second data can also satisfy other formulas.
  • the PL may be estimated by the terminal device 1 based on the downlink signal and is not the path loss of the real side link.
  • the terminal device 1 and the terminal device 2 are taken as an example for description.
  • the terminal device 2 can send a way to the terminal device 1. The relevant parameters are damaged to assist the terminal device 1 in performing more accurate path loss estimation and power adjustment.
  • the path loss related parameter is the actual transmission power of the terminal device 2; in another possible manner, the path loss related parameter is the path loss between the terminal device 2 and the terminal device 1 estimated, specifically
  • the terminal device 1 transmits the actual transmission power of the data transmitted by the terminal device 1 to the terminal device 2, and the actual transmission power can be sent in the SCI or the MAC CE, and the terminal device 2 can estimate the terminal device 1 and the terminal according to the actual transmission power.
  • the terminal device 1 may acquire a plurality of path loss estimation values with other terminal devices, such as the path loss value obtained by the terminal device 1 and the terminal device 2, and the terminal device.
  • the path loss value between the three, such as the path loss value may be estimated by the terminal device 1 itself, or may be transmitted by the terminal device 2 or the terminal device 3 to the terminal device 1.
  • the terminal device 1 combines multiple path loss values into one path loss value for subsequent adjustment of the multicast data transmission power.
  • the specific determination method may take the maximum value, the minimum value, the mean value, and the weighted average value. It can be other ways, such as median, mode, quartile, geometric mean, harmonic mean, and so on.
  • the terminal device 1 also sends an SCI when transmitting the second data, where the SCI is used to indicate information such as a time-frequency resource for transmitting the second data, a modulation and coding format, and the like, and the method for determining the transmission power of the second data in step 24 may also be used. Determine the transmit power of this SCI.
  • the SCI and the data use the same power adjustment information, and the terminal device 2 and the terminal device 3 only need to send one power adjustment information for the SCI or the data; another possible way, the SCI and the data are used differently.
  • Power adjustment information but according to one can determine the other, such as the power adjustment information of the SCI can be determined according to the power adjustment information of the data, the terminal device 2 and the terminal device 3 only need to send one power adjustment information for the SCI or the data; In a possible way, the SCI and the data use different power adjustment information, and the terminal device 2 and the terminal device 3 need to separately transmit power adjustment information for the SCI and the data.
  • T1 and T2 may be fixed values, fixed, or configured by the access network device, or pre-configured, or selected by the terminal device 1 within a possible range of values. If the terminal device 1 is in the time range and unicast data needs to be transmitted to the terminal device 2, the transmission power of the new data is adjusted according to the power adjustment information.
  • the terminal device 1 receives the power adjustment information sent by the terminal device 2 and the terminal device 3, but the two information may not be sent at the same time, for example, the terminal device 1 receives the message in the subframe n1.
  • the power adjustment information sent by the UE2 is received, and the power adjustment information sent by the terminal device 3 is received in the subframe n2, and the two power adjustment information respectively correspond to respective effective time ranges [n1+T1, n1+T2] and [n2+ T1', n2+T2'], where T1 and T2, and T1' and T2' may be the same value or different values.
  • the power adjustment information corresponding to the effective time range of the subframe m is valid. If the subframes m are both in the two effective time ranges, both power adjustment information sent by the terminal device 2 and the terminal device 3 are valid. If the subframe m is only in one of the effective time ranges, such as only in [n2+T1', n2+T2'], only the power adjustment information sent by the terminal device 3 is valid, and the power transmitted by the terminal device 2 The adjustment information has expired. If the subframe in which the terminal device 1 transmits data does not have valid power adjustment information, the terminal device 1 may transmit according to the maximum transmission power, or remove f(i) in the formula in step 24, thereby determining the transmission power.
  • step 25 the terminal device 1 transmits the second data to the terminal devices 2 to 4 with the transmission power determined in step 24.
  • the terminal devices 2 to 4 determine the power adjustment information according to at least one of the data and the control information received from the terminal device 1 and transmit the power adjustment information to the terminal device 1, and the terminal device 1 adjusts according to the power transmitted by the terminal devices 2 to 4.
  • the information is used to determine the transmission power of the second data to be transmitted, that is, the terminal device 1 can adjust the power of the transmitted data according to the feedback of the receiving end, thereby improving power control flexibility and accuracy.
  • FIG. 4 shows a possible schematic diagram of a terminal device 1 for performing the method involved in the embodiment of FIG. 2, the terminal device 1 comprising a transmitting unit 401, a receiving unit 402 and a determining unit 403.
  • the sending unit 401 is configured to send the first data and the first side line control information corresponding to the first data to the terminal devices 2 to 4.
  • the first data and the first side row control information are consistent with the embodiment of FIG. 2 and will not be described again.
  • the receiving unit 402 is configured to receive power adjustment information 2 to 4 from the terminal devices 2 to 4, and the power adjustment information 2 to 4 are determined by the terminal devices 2 to 4 according to at least one of the first data and the first side line control information. of.
  • the determining unit 403 is configured to determine the transmit power of the second data according to the power adjustment information 2 to 4.
  • the transmission power of the second data and the second data is the same as that of the embodiment of FIG. 2 and will not be described again.
  • the determining unit 403 determines the transmission power of the second data according to the power adjustment information 2, the power adjustment information 3, and the power adjustment information 4, for example, the determining unit 403 may perform the power adjustment information 2, the power adjustment information 3, and the power adjustment information according to the power adjustment information.
  • At least one of the maximum value, the minimum value, the average value, the median value, the mode value, the quartile value, the geometric mean value, and the harmonic mean value of 4 determines the first power adjustment value, and the terminal device 1 adjusts according to the first power.
  • the value determines the transmission power of the second data.
  • the sending unit 401 is further configured to determine the transmission power determined by the unit 403 to send the second data to the terminal devices 2 to 4.
  • the sending unit 401 may be a transmitter or a transceiver
  • the receiving unit 402 may be a receiver or a transceiver
  • the determining unit 403 may be a processor
  • the terminal device may further include a memory for storing the terminal device. Program code and data.
  • the terminal devices 2 to 4 determine the power adjustment information according to at least one of the data and the control information received from the terminal device 1 and transmit the power adjustment information to the terminal device 1, and the terminal device 1 adjusts according to the power transmitted by the terminal devices 2 to 4.
  • the information is used to determine the transmission power of the second data to be transmitted, that is, the terminal device 1 can adjust the power of the transmitted data according to the feedback of the receiving end, thereby improving power control flexibility and accuracy.
  • FIG. 5 shows a possible schematic diagram of a terminal device 2 for performing the method in the embodiment of FIG. 2, the terminal device 2 comprising a receiving unit 501, a determining unit 502 and a transmitting unit 503.
  • the terminal device 3 and the terminal device 4 have the same structure as the terminal device 2 and will not be described again.
  • the receiving unit 501 is configured to receive, by the terminal device 1, first data and first side line control information corresponding to the first data.
  • the first data and the first side row control information are consistent with the embodiment of FIG. 2 and will not be described again.
  • the determining unit 502 is configured to determine power adjustment information according to at least one of the first data and the first side row control information.
  • the determining unit 502 may determine the power adjustment information 2 according to the first data or the first side row control information, and the determining unit 502 may also determine the power adjustment information 2 according to the first data and the first side row control information.
  • the determining unit 502 may determine the power adjustment according to at least one of a reference signal received power RSRP measurement, a reference signal received quality RSRQ measurement, and a received signal strength indicator RSSI measurement of at least one of the first data and the first side line control information.
  • Information 2 when the measurement result is higher than the first threshold, determining that the power adjustment information 2 is to reduce power; when the measurement result is lower than the second threshold, determining that the power adjustment information 2 is increasing power; when the measurement result is between When the first threshold is between the second threshold and the second threshold, the power is unchanged.
  • the first threshold and the second threshold may be configured by the access network device and sent to the terminal device 1, or may be pre-configured by a protocol or a standard.
  • the determining unit 502 may further determine the power adjustment information 2 according to the power indication information included in the first data or included in the first side row control information, where the power indication information is used to indicate the first data and the first The transmit power of at least one of the side line control information.
  • the determining unit 502 can determine the power adjustment information 2 according to the transmission power of at least one of the first data and the first side line control information.
  • the sending unit 503 is configured to send the power adjustment information to the first terminal device, where the power adjustment information is used by the first terminal device to determine a transmit power of the second data.
  • the transmission power of the second data and the second data is the same as that of the embodiment of FIG. 2 and will not be described again.
  • the receiving unit 501 can be a receiver or a transceiver
  • the determining unit 502 can be a processor
  • the sending unit 503 can be a transmitter or a transceiver
  • the terminal device can further include a memory for storing the terminal device. Program code and data.
  • the terminal devices 2 to 4 determine the power adjustment information according to at least one of the data and the control information received from the terminal device 1 and transmit the power adjustment information to the terminal device 1, and the terminal device 1 adjusts according to the power transmitted by the terminal devices 2 to 4.
  • the information is used to determine the transmission power of the second data to be transmitted, that is, the terminal device 1 can adjust the power of the transmitted data according to the feedback of the receiving end, thereby improving power control flexibility and accuracy.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • a computer readable storage medium A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

一种功率控制方法和终端设备，所述方法包括：第一终端设备向至少一个第二终端设备发送第一数据和所述第一数据对应的第一侧行控制信息；所述第一终端设备从所述至少一个第二终端设备接收至少一个功率调整信息，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的；所述第一终端设备根据所述至少一个功率调整信息确定第二数据的发送功率；所述第一终端设备以所述发送功率向所述至少一个第二终端设备发送所述第二数据。由此，第一终端设备可以根据接收端的反馈调整发送数据的功率，提高了功率控制灵活性和准确性。

Description

一种功率控制方法和终端设备
本申请要求于2017年07月12日提交中国专利局、申请号为201710567573.6、申请名称为“一种功率控制方法和终端设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请的实施例涉及通信系统，尤其是涉及一种功率控制方法和终端设备。
背景技术
设备到设备(Device to Device，D2D)通信、机器到机器(Machine to Machine，M2M)通信、车与车(Vehicle to Vehicle，V2V)通信、车与行人V2P(Vehicle to Pedestrian，V2P)通信或车与基础设施/网络V2I/N(Vehicle to Infrastructure/Network，V2I/N)通信是终端设备(terminal device)之间直接进行通信的技术，即直连通信，V2V、V2P以及V2I/N统称为V2X，即车与任何事物相通信。在V2X通信中，发送端设备会直接向接收端设备发送数据，发送端设备发送数据的功率是根据发送端设备的最大发送功率、发送端设备发送所述数据占用的资源块数目以及发送端设备估计的路损等因素确定的，但是，这种确定发送端设备发送数据的发送功率的方法比较固定，不能够灵活和准确的控制发送端设备的发送功率。因此，业界亟需一种更加灵活和准确的功率控制方法。
发明内容
本申请的实施例提供一种功率控制方法和终端设备，能够实现在V2X通信中更加灵活和准确的功率控制。
第一方面，提供一种功率控制方法，包括：第一终端设备向至少一个第二终端设备发送第一数据和所述第一数据对应的第一侧行控制信息；所述第一终端设备从所述至少一个第二终端设备接收至少一个功率调整信息，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的；所述第一终端设备根据所述至少一个功率调整信息确定第二数据的发送功率；所述第一终端设备以所述发送功率向所述至少一个第二终端设备发送所述第二数据。
至少一个第二终端设备根据从第一终端设备接收的数据和控制信息中的至少一个确定功率调整信息并发送给第一终端设备，第一终端设备根据至少一个第二终端设备发送的功率调整信息来确定将要发送的第二数据的发送功率，即第一终端设备可以根据接收端的反馈调整发送数据的功率，提高了功率控制灵活性和准确性。
在一种可能的设计中，所述第一终端设备根据所述至少一个功率调整信息确定第二数据的发送功率包括：所述第一终端设备根据所述至少一个功率调整信息的最大值、最小值、平均值、中位数值、众数值、4分位数值、几何平均值和调和平均值中的至少一个确定第 一功率调整值；所述第一终端设备根据所述第一功率调整值确定第二数据的发送功率。
在一种可能的设计中，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的，包括：所述至少一个功率调整信息为所述至少一个第二终端设备根据对所述第一数据和所述第一侧行控制信息中的至少一个的测量确定的，所述测量包括参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一个。
至少一个第二终端设备通过测量第一数据和第一侧行控制信息的方式确定功率调整信息，即通过至少一个第二终端设备实际接收到的信号的测量得到功率调整信息，可以提高功率调整的准确度。
在一种可能的设计中，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的，包括：所述至少一个功率调整信息是根据所述第一终端设备发送的功率指示信息确定的，所述功率指示信息包含在所述第一数据中或者包含在所述第一侧行控制信息中，所述功率指示信息用于指示所述第一数据和所述第一侧行控制信息中的至少一个的发送功率。
至少一个第二终端设备根据第一终端设备发送的功率指示信息确定功率调整信息可以简化第二终端设备确定功率调整信息的方法。
在一种可能的设计中，所述功率调整信息用于指示功率增加、减小或不变中的至少一种。
在一种可能的设计中，所述第一终端设备从所述至少一个第二终端设备接收路损相关参数，所述路损相关参数用于所述第一终端设备确定所述第二数据的发送功率，所述路损相关参数可以为所述至少一个第二终端设备的发送功率，或者为所述至少一个第二终端设备对所述第一终端设备与所述至少一个第二终端设备之间路损的估计值。
第二方面，提供一种第一终端设备，包括：发送单元，用于向至少一个第二终端设备发送第一数据和所述第一数据对应的第一侧行控制信息；接收单元，用于从所述至少一个第二终端设备接收至少一个功率调整信息，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的；确定单元，用于根据所述至少一个功率调整信息确定第二数据的发送功率；所述发送单元以所述发送功率向所述至少一个第二终端设备发送所述第二数据。
至少一个第二终端设备根据从第一终端设备接收的数据和控制信息中的至少一个确定功率调整信息并发送给第一终端设备，第一终端设备根据至少一个第二终端设备发送的功率调整信息来确定将要发送的第二数据的发送功率，即第一终端设备可以根据接收端的反馈调整发送数据的功率，提高了功率控制灵活性和准确性。
在一种可能的设计中，所述确定单元根据所述至少一个功率调整信息确定第二数据的发送功率包括：所述确定单元根据所述至少一个功率调整信息的最大值、最小值、平均值、中位数值、众数值、4分位数值、几何平均值和调和平均值中的至少一个确定第一功率调整值；所述确定单元根据所述第一功率调整值确定第二数据的发送功率。
在一种可能的设计中，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的，包括：所述至少一个功率调整信息为所述至少一个第二终端设备根据对所述第一数据和所述第一侧行控制信息中的 至少一个的测量确定的，所述测量包括参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一个。
至少一个第二终端设备通过测量第一数据和第一侧行控制信息的方式确定功率调整信息，即通过至少一个第二终端设备实际接收到的信号的测量量得到功率调整信息，可以提高功率调整的准确度。
在一种可能的设计中，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的，包括：所述至少一个功率调整信息是根据所述发送单元发送的功率指示信息确定的，所述功率指示信息包含在所述第一数据中或者包含在所述第一侧行控制信息中，所述功率指示信息用于指示所述第一数据和所述第一侧行控制信息中的至少一个的发送功率。
至少一个第二终端设备根据第一终端设备发送的功率指示信息确定功率调整信息可以简化第二终端设备确定功率调整信息的方法。
在一种可能的设计中，所述功率调整信息用于指示功率增加、减小或不变中的至少一种。
在一种可能的设计中，所述第一终端设备从所述至少一个第二终端设备接收路损相关参数，所述路损相关参数用于所述第一终端设备确定所述第二数据的发送功率，所述路损相关参数可以为所述至少一个第二终端设备的发送功率，或者为所述至少一个第二终端设备对所述第一终端设备与所述至少一个第二终端设备之间路损的估计值。
在一个可能的设计中，所述发送单元可以为发送器或收发器，所述处理单元可以为处理器，所述接收单元可以为接收器或收发器。
第三方面，提供一种功率控制方法，包括：第二终端设备从第一终端设备接收第一数据和所述第一数据对应的第一侧行控制信息；所述第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息；所述第二终端设备向所述第一终端设备发送所述功率调整信息，所述功率调整信息用于所述第一终端设备确定第二数据的发送功率。
至少一个第二终端设备根据从第一终端设备接收的数据和控制信息中的至少一个确定功率调整信息并发送给第一终端设备，第一终端设备根据至少一个第二终端设备发送的功率调整信息来确定将要发送的第二数据的发送功率，即第一终端设备可以根据接收端的反馈调整发送数据的功率，提高了功率控制灵活性和准确性。
在一种可能的设计中，所述第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息，包括：所述第二终端设备根据对所述第一数据和所述第一侧行控制信息中的至少一个的测量确定所述功率调整信息，所述测量包括参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一个。
至少一个第二终端设备通过测量第一数据和第一侧行控制信息的方式确定功率调整信息，即通过至少一个第二终端设备实际接收到的信号的测量量得到功率调整信息，可以提高功率调整的准确度。
在一种可能的设计中，所述第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息，包括：所述第二终端设备根据从所述第一终端设备接收 的功率指示信息确定所述功率调整信息，所述功率指示信息包含在所述第一数据中或者包含在所述第一侧行控制信息中，所述功率指示信息用于指示所述第一数据和所述第一侧行控制信息中的至少一个的发送功率。
至少一个第二终端设备根据第一终端设备发送的功率指示信息确定功率调整信息可以简化第二终端设备确定功率调整信息的方法。
在一种可能的设计中，所述功率调整信息用于指示功率增加、减小或不变中的至少一种。
在一种可能的设计中，所述至少一个第二终端设备向所述第一终端设备发送路损相关参数，所述路损相关参数用于所述第一终端设备确定所述第二数据的发送功率，所述路损相关参数可以为所述至少一个第二终端设备的发送功率，或者为所述至少一个第二终端设备对所述第一终端设备与所述至少一个第二终端设备之间路损的估计值。
第四方面，提供一种第二终端设备，包括：接收单元，用于从第一终端设备接收第一数据和所述第一数据对应的第一侧行控制信息；确定单元，用于根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息；发送单元，用于向所述第一终端设备发送所述功率调整信息，所述功率调整信息用于所述第一终端设备确定第二数据的发送功率。
至少一个第二终端设备根据从第一终端设备接收的数据和控制信息中的至少一个确定功率调整信息并发送给第一终端设备，第一终端设备根据至少一个第二终端设备发送的功率调整信息来确定将要发送的第二数据的发送功率，即第一终端设备可以根据接收端的反馈调整发送数据的功率，提高了功率控制灵活性和准确性。
在一种可能的设计中，所述确定单元根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息，包括：所述确定单元根据对所述第一数据和所述第一侧行控制信息中的至少一个的测量确定所述功率调整信息，所述测量包括参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一个。
至少一个第二终端设备通过测量第一数据和第一侧行控制信息的方式确定功率调整信息，即通过至少一个第二终端设备实际接收到的信号的测量量得到功率调整信息，可以提高功率调整的准确度。
在一种可能的设计中，所述确定单元根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息，包括：所述确定单元根据从所述第一终端设备接收的功率指示信息确定所述功率调整信息，所述功率指示信息包含在所述第一数据中或者包含在所述第一侧行控制信息中，所述功率指示信息用于指示所述第一数据和所述第一侧行控制信息中的至少一个的发送功率。
至少一个第二终端设备根据第一终端设备发送的功率指示信息确定功率调整信息可以简化第二终端设备确定功率调整信息的方法。
在一种可能的设计中，所述功率调整信息用于指示功率增加、减小或不变中的至少一种。
在一种可能的设计中，所述至少一个第二终端设备向所述第一终端设备发送路损相关参数，所述路损相关参数用于所述第一终端设备确定所述第二数据的发送功率，所述路损相关参数可以为所述至少一个第二终端设备的发送功率，或者为所述至少一个第二终端设 备对所述第一终端设备与所述至少一个第二终端设备之间路损的估计值。
在一个可能的设计中，所述发送单元可以为发送器或收发器，所述处理单元可以为处理器，所述接收单元可以为接收器或收发器。
第五方面，本申请实施例提供了一种芯片，用于执行上述方面所设计的程序。
第六方面，本申请实施例提供了一种计算机存储介质，用于储存为上述终端设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
附图说明
图1是根据本申请实施例的V2X通信中单播或组播通信示意图。
图2是根据本申请实施例的功率控制方法流程图。
图3是根据本申请实施例的功率控制方法示意图。
图4是根据本申请实施例的一种终端设备。
图5是根据本申请实施例的另一种终端设备。
具体实施方式
图1为V2X通信中单播或组播通信的一个示意图，对于组播通信的情况，终端1会将其数据发送给其周围的部分终端设备而不是向其周边的所有终端设备都进行发送，例如，终端设备1向终端设备2、终端设备3以及终端设备4发送组播数据，此组播数据例如可以包括终端设备1的速度信息、位置信息、方向信息等。终端设备1可以将自己的上述信息以直连通信的方式告知终端设备1周边的其余终端设备2至4，用于辅助其余的终端设备2至4进行驾驶决策，例如调整速度、位置、行进方向等，以提高终端在行驶过程中的可靠性和稳定性。对于单播通信的情况，终端设备1只需要将数据发送给终端1周边的一个终端，例如，终端设备2，而不会将数据发送给终端设备3或终端设备4。终端设备1向终端设备2发送单播数据或终端设备1向终端设备2至4发送组播数据的时频资源可以是由接入网设备分配给终端设备1的，也可以是终端设备1自主选择的。
本申请所涉及到的接入网设备是一种部署在无线接入网中用以为终端设备提供无线通信功能的装置。所述接入网设备可以包括各种形式的基站(Base Station，BS)，例如，宏基站或微基站，中继站或接入点等等。在采用不同的无线接入技术的系统中，具备接入网设备功能的设备的名称可能会有所不同，例如，其为第五代5G网络中的接入网设备，在LTE网络中，称为演进的节点B(evolved NodeB简称：eNB或者eNodeB),在第三代3G网络中，称为节点B(Node B)等等，或者V2V通信中的路边单元(Road Side Unit，RSU)。为方便描述，本申请中，上述为终端设备提供无线通信功能的装置统称为接入网设备。
本申请所涉及到的终端设备可以包括各种具有无线通信功能的手持设备，例如，车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，移动台(Mobile station，MS)，终端(terminal)或用户设备(User Equipment，UE)等等。为方便描述，本申请中，上面提到的设备统称为终端设备。
下面结合具体例子，更加详细地描述本申请的实施例。
图2为本申请实施例提供的一种功率调整方法及终端设备，具体步骤如下：
步骤21，终端设备1向至少一个第二终端设备发送第一数据和第一数据对应的第一 侧行控制信息(Sidelink Control Information，SCI)，其中，以至少一个第二终端设备为3个第二终端设备的情况为例进行说明，具体如图3所示，当然，至少一个第二终端设备可以是1个，2个，3个，以及更多个。终端设备2、终端设备3以及终端设备4分别从所述终端设备1接收第一数据和第一数据对应的第一侧行控制信息。
终端设备1发送的第一数据是由应用层确定的，例如，可以包括终端设备1的速度信息、位置信息和方向信息等，第一侧行控制信息至少包括发送所述第一数据的时频资源指示信息和第一数据的调制编码格式。
步骤22，终端设备2、终端设备3以及终端设备4分别根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息。
具体的，终端设备2可以根据第一数据或第一侧行控制信息确定功率调整信息2，终端设备2也可以根据第一数据和第一侧行控制信息确定功率调整信息2；终端设备3可以根据第一数据或第一侧行控制信息确定功率调整信息3，终端设备3也可以根据第一数据和第一侧行控制信息确定功率调整信息3；终端设备4可以根据第一数据或第一侧行控制信息确定功率调整信息4，终端设备4也可以根据第一数据和第一侧行控制信息确定功率调整信息4。终端设备2也可以根据从终端设备1接收的多个数据和/或多个侧行控制信息确定功率调整信息2，终端设备还可以根据一段时间内从终端设备1接收的多个数据和/或多个侧行控制信确定功率调整信息2。对于终端设备3和4也是类似地，不再赘述。
以终端设备2为例说明终端设备是如何确定功率调整信息的。终端设备2可以根据对第一数据和第一侧行控制信息中的至少一个的参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一种测量确定功率调整信息2，一种可能的实现方式，当测量结果高于或高于等于第一门限时，则确定功率调整信息2为减小功率；当测量结果低于或低于等于第二门限时，则确定功率调整信息2为增大功率；当测量结果为其它情况，如介于第一门限和第二门限之间时，则功率不变。当然，第一门限与第二门限可以相同。第一门限和第二门限可以是接入网设备配置并发送给终端设备1的，也可以预配置的，或者为协议或标准中规定好的。所述第一门限或第二门限可以与终端设备之间的距离有关，如终端设备之间距离不同时，可以取不同的门限值。具体地，终端设备2可以根据终端设备1发送的数据中包含的地理位置信息确定与终端设备1之间的距离，当该距离位于第一距离范围内时，则将测量与第一距离范围对应的第一门限或者第二门限比较，当该距离位于第二距离范围内时，则将测量与第二距离范围对应的第一门限或者第二门限比较。
功率调整信息用于指示功率增加、减小或不变中的至少一种。每次功率增加或者减小可以为一个固定值，如X db等，X＞0，例如X＝1的情况，终端设备2确定需增加功率时，功率调整信息指示功率增大1db，或者确定需减小功率时，功率调整信息指示功率减小1db等，或者功率调整信息指示功率不变。所述X的具体值也可以由测量结果和门限值比较的结果来确定。如果功率调整信息仅指示功率上升、下降、不变三种情况的话，则功率调整信息可以使用2比特进行指示。功率调整信息还可以在指示功率增加或者减小时，还指示增加的功率值或减小的功率值，此时，功率调整信息可以使用更多的比特进行指示。
终端设备2还可以根据包含在第一数据中或者包含在所述第一侧行控制信息中的功率指示信息确定功率调整信息2，功率指示信息用于指示所述第一数据和所述第一侧行控 制信息中的至少一个的发送功率。终端设备2可以根据第一数据和所述第一侧行控制信息中的至少一个的发送功率确定功率调整信息2。具体地，终端设备2可以根据功率控制信息确定终端设备1的功率调整余量，进而确定功率调整信息2，比如总是选择根据测量确定的功率调整信息和功率调整余量中较小的一个作为功率调整信息。可选地，这里的功率指示信息也可以用于指示所述第一数据和所述第一侧行控制信息中的至少一个的功率调整余量。
步骤23，终端设备2将功率调整信息2发送给终端设备1，终端设备3将功率调整信息3发送给终端设备1，终端设备4将功率调整信息4发送给终端设备1，而终端设备1从终端设备2接收功率调整信息2，终端设备1从终端设备3接收功率调整信息3，终端设备1从终端设备4接收功率调整信息4。终端设备2至4向终端设备1发送的各自的功率调整信息可以包括在物理层信令如SCI中，也可以通过其它的物理信道发送，如物理反馈信道等，还可以包含在高层信令如媒体接入控制元(MAC Control Element，MAC CE)中。下面以终端设备2为例进行说明。功率调整信息若包含在SCI中，则可以为一个单独的SCI由终端设备2发送给终端设备1，而没有对应数据的传输，也可以在终端设备2向终端设备1发送数据时，包含在此数据对应的SCI中。
终端设备2还可以在SCI或MAC CE中指示多个其它终端设备的功率调整信息，例如，终端设备2从终端设备1接收第一数据和第一侧行控制信息，终端设备2还从终端设备3接收第三数据和第三控制信息，然后，终端设备2会根据第一数据和第一侧行控制信息中的至少一个确定功率调整信息21，终端设备2还会根据第三数据和第三侧行控制信息中的至少一个确定功率调整信息22，则终端设备2会在SCI或MAC CE中包含功率调整信息21和功率调整信息22。具体的，SCI或MAC CE例如可以用4比特来指示功率调整信息21和功率调整信息22，终端设备2可以依据其它终端设备的序号由高到低的顺序(当然也可以按照其它顺序)来确定4比特中前2个比特用于指示终端设备3的功率调整信息22，后两个比特用于指示终端设备1的功率调整信息21。在MAC CE中可以包含多个比特指示多个其它终端设备的ID(如组内ID、UE ID等等)和所述多个其它终端设备对应的功率调整信息。对于单播通信，由于终端设备2只需要针对终端设备1这一个终端设备发送功率调整信息，故不需要考虑终端设备1的顺序。当单播通信和组播通信的功率调整信息均通过SCI传输的情况下，需要在SCI中预留足够数量的比特用于功率调整信息的传输，例如，预留10个比特传输功率调整信息，则可以传输组播通信中五个其它终端设备的功率调整信息，但是，如果是单播的情况下，10个比特中只有2个比特用于传输功率调整信息。当单播通信和组播通信的功率调整信息均通过SCI传输的情况下，还可以通过不同的资源来区分，如对单播下的SCI和组播下的SCI在单播资源和做资源上分别传输，则接收侧终端设备通过资源即可区分单播和组播的SCI，此时可以对SCI采用不同的格式，如不同的长度等。可选的，在单播通信的场景下，功率调整信息通过SCI来传输，而在组播通信的场景下，功率调整信息通过MAC CE来传输。比如，在SCI中有2比特来指示功率调整信息的增大、减小和不变三种情况，剩下的一种取值用来指示有多个功率调整信息在MAC层传输的情况。
步骤24，终端设备1根据功率调整信息2、功率调整信息3以及功率调整信息4确定第二数据的发送功率。第二数据为终端设备1将要发送给终端设备2至4的数据，第二数 据与第一数据类似地，可以是由应用层确定的，例如，包括终端设备1的速度信息、位置信息和方向信息等。
终端设备1根据功率调整信息2、功率调整信息3以及功率调整信息4确定第二数据的发送功率有多种方式，例如，终端设备1可以根据功率调整信息2、功率调整信息3和功率调整信息4的最大值、最小值、平均值、中位数值、众数值、4分位数值、几何平均值和调和平均值中的至少一个确定第一功率调整值，终端设备1再根据第一功率调整值确定第二数据的发送功率。例如，功率调整信息2指示终端设备1的发送功率增大3db，功率调整信息3指示终端设备1的发送功率减小1db，终端设备1根据功率调整信息2和功率调整信息3确定一个功率调整值，具体地，可以取最大值，如max{3db，-1db}＝3db，或者取最小值，如min{3db，-1db}＝-1db，或者取平均值，如mean{3db，-1db}＝1db。
第二数据的发送功率可以以下公式的方式表示，例如第二数据的发送功率满足以下公式：
P PSSCH＝min{P CMAX,PSSCH,10log 10(M PSSCH)+P O_PSSCH+α PSSCH·PL+δ PSSCH}，或
P PSSCH＝min{P CMAX,PSSCH,10log 10(M PSSCH)+P O_PSSCH+α PSSCH·PL+f(i)} ，
其中，f(i)＝f(i-1)+δ PSSCH，P PSSCH为所述第二数据的发送功率，P CMAX,PSSCH为所述第一终端设备的最大发射功率，M PSSCH为所述第一终端设备发送所述第二数据占用的物理资源块数，PL为所述第一终端设备估计的路损，P O_PSSCH和α PSSCH为高层参数，δ PSSCH为所述第一功率调整值，所述f(i)的初始值为0或者预设的值。以上公式只是一个示例，第二数据的发送功率还可以满足其它的公式。
PL可以为终端设备1根据下行信号估计的，并不是真实的侧行链路的路损。在单播及组播通信中，以终端设备1和终端设备2为例进行说明，为使终端设备1能更精确地估计到终端设备2的路损，终端设备2可以向终端设备1发送路损相关参数，以辅助终端设备1进行更精准的路损估计和功率调整。一种可能的方式，该路损相关参数为终端设备2的实际发送功率；另一种可能的方式，该路损相关参数为终端设备2估计的与终端设备1之间的路损，具体地，终端设备1向终端设备2发送所述终端设备1发送数据的实际发送功率，该实际发送功率可以在SCI或者MAC CE中发送，则终端设备2可以根据此实际发送功率估计终端设备1和终端设备2之间的路损，进而将该路损发送给终端设备1，辅助UE1进行路损估计和功率调整。
特别地，在组播通信中，终端设备1可能会获取到多个与其它终端设备之间的路损估计值，如终端设备1获取到与终端设备2之间的路损值以及与终端设备3之间的路损值等，这些路损值，可以是终端设备1自己估计的，也可以是终端设备2或终端设备3发送给终端设备1的。终端设备1要将多个路损值合并成一个路损值，用于后续组播数据发送功率的调整，具体的确定方式，可以取其中的最大值、最小值、均值、加权平均值，也可以是其它的方式，如中位数、众数、4分位数、几何平均数、调和平均数等等。
终端设备1在发送第二数据时还会发送SCI，此SCI用于指示发送第二数据的时频资源、调制编码格式等信息，在步骤24中确定第二数据的发送功率的方法也可以用于确定此SCI的发送功率。一种可能的方式，SCI和数据使用相同的功率调整信息，则终端设备2和终端设备3仅需要针对SCI或者数据发送一个功率调整信息即可；另一种可能的方式，SCI和数据使用不同的功率调整信息，但是根据一个可以确定另一个，如SCI的功率调整 信息可以根据数据的功率调整信息确定，则终端设备2和终端设备3仅需要针对SCI或者数据发送一个功率调整信息；又一种可能的方式，SCI和数据使用不同的功率调整信息，终端设备2和终端设备3需要针对SCI和数据分别发送功率调整信息。
在单播通信的场景下，假设终端设备1在子帧n收到终端设备2发送的功率调整信息2，则该功率调整信息在时间范围[n+T1,n+T2]内生效，其中T2>＝T1>＝1，且T1和T2为整数。这里的T1和T2可以为规定的数值，固定不变，也可以是接入网设备配置的，或者预配置的，或者由终端设备1在一个可能的取值范围内自行选取。如果终端设备1在该时间范围内，又有单播数据需要发送给终端设备2，则根据该功率调整信息调整新数据的发送功率。
在组播通信的场景下，假设终端设备1收到终端设备2和终端设备3发送的功率调整信息，但是这两个信息可能并不是同一时刻发送的，比如终端设备1在子帧n1收到UE2发送的功率调整信息，而在子帧n2收到终端设备3发送的功率调整信息，这两个功率调整信息分别对应了各自的生效时间范围[n1+T1,n1+T2]和[n2+T1’,n2+T2’]，其中T1和T2，以及T1’和T2’可以是相同的取值，也可以是不同的取值。当终端设备1在子帧m又有组播数据要发送给终端设备2和终端设备3时，子帧m仍处于生效时间范围所对应的功率调整信息才是有效的。如子帧m均处于两个生效时间范围之中，则终端设备2和终端设备3发送的两个功率调整信息均是有效的。如子帧m仅处于其中一个生效时间范围内时，如仅处于[n2+T1’,n2+T2’]中，则只有终端设备3发送的功率调整信息是有效的，终端设备2发送的功率调整信息已失效。如果终端设备1发送数据的子帧没有有效的功率调整信息时，终端设备1可以按照最大发送功率发送，或者在步骤24中的公式中去掉f(i)，以此确定发送功率。
步骤25，终端设备1以步骤24确定的发送功率向终端设备2至4发送第二数据。
通过本申请实施例，终端设备2至4根据从终端设备1接收的数据和控制信息中的至少一个确定功率调整信息并发送给终端设备1，终端设备1根据终端设备2至4发送的功率调整信息来确定将要发送的第二数据的发送功率，即终端设备1可以根据接收端的反馈调整发送数据的功率，提高了功率控制灵活性和准确性。
图4示出了用于执行图2实施例中所涉及方法的终端设备1的一种可能的结构示意图，所述终端设备1包括发送单元401，接收单元402以及确定单元403。
发送单元401，用于向终端设备2至4发送第一数据和所述第一数据对应的第一侧行控制信息。第一数据以及第一侧行控制信息与图2实施例一致，不再赘述。
接收单元402，用于从终端设备2至4接收功率调整信息2至4，功率调整信息2至4为终端设备2至4根据第一数据和所述第一侧行控制信息中的至少一个确定的。
确定单元403，用于根据功率调整信息2至4确定第二数据的发送功率。第二数据以及第二数据的发送功率与图2实施例一致，不再赘述。确定单元403根据功率调整信息2、功率调整信息3以及功率调整信息4确定第二数据的发送功率有多种方式，例如，确定单元403可以根据功率调整信息2、功率调整信息3和功率调整信息4的最大值、最小值、平均值、中位数值、众数值、4分位数值、几何平均值和调和平均值中的至少一个确定第一功率调整值，终端设备1再根据第一功率调整值确定第二数据的发送功率。
发送单元401，还用于以确定单元403确定的发送功率向终端设备2至4发送第二数 据。
发送单元401可以为发送器或收发器，接收单元402可以为接收器或收发器，确定单元403可以为处理器，同时，所述终端设备还可以包括存储器，所述存储器用于存储终端设备的程序代码和数据。
通过本申请实施例，终端设备2至4根据从终端设备1接收的数据和控制信息中的至少一个确定功率调整信息并发送给终端设备1，终端设备1根据终端设备2至4发送的功率调整信息来确定将要发送的第二数据的发送功率，即终端设备1可以根据接收端的反馈调整发送数据的功率，提高了功率控制灵活性和准确性。
图5示出了用于执行图2实施例中所涉及方法的终端设备2的一种可能的结构示意图，所述终端设备2包括接收单元501、确定单元502以及发送单元503。当然，终端设备3以及终端设备4与终端设备2具有同样的结构，不再赘述。
接收单元501，用于从终端设备1接收第一数据和所述第一数据对应的第一侧行控制信息。第一数据以及第一侧行控制信息与图2实施例一致，不再赘述。
确定单元502，用于根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息。
具体的，确定单元502可以根据第一数据或第一侧行控制信息确定功率调整信息2，确定单元502也可以根据第一数据和第一侧行控制信息确定功率调整信息2。
确定单元502可以根据对第一数据和第一侧行控制信息中的至少一个的参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一种测量确定功率调整信息2，当测量结果高于第一门限时，则确定功率调整信息2为减小功率；当测量结果低于第二门限时，则确定功率调整信息2为增大功率；当测量结果介于第一门限和第二门限之间时，则功率不变。第一门限和第二门限可以是接入网设备配置并发送给终端设备1的，也可以是由协议或标准预配置的。
确定单元502还可以根据包含在第一数据中或者包含在所述第一侧行控制信息中的功率指示信息确定功率调整信息2，功率指示信息用于指示所述第一数据和所述第一侧行控制信息中的至少一个的发送功率。确定单元502可以根据第一数据和所述第一侧行控制信息中的至少一个的发送功率确定功率调整信息2。
发送单元503，用于向所述第一终端设备发送所述功率调整信息，所述功率调整信息用于所述第一终端设备确定第二数据的发送功率。第二数据以及第二数据的发送功率与图2实施例一致，不再赘述。
接收单元501可以为接收器或收发器，确定单元502可以为处理器，发送单元503可以为发送器或收发器，同时，所述终端设备还可以包括存储器，所述存储器用于存储终端设备的程序代码和数据。
通过本申请实施例，终端设备2至4根据从终端设备1接收的数据和控制信息中的至少一个确定功率调整信息并发送给终端设备1，终端设备1根据终端设备2至4发送的功率调整信息来确定将要发送的第二数据的发送功率，即终端设备1可以根据接收端的反馈调整发送数据的功率，提高了功率控制灵活性和准确性。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的 划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (18)

  1. 一种功率控制方法，其特征在于，包括：
    第一终端设备向至少一个第二终端设备发送第一数据和所述第一数据对应的第一侧行控制信息；
    所述第一终端设备从所述至少一个第二终端设备接收至少一个功率调整信息，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的；
    所述第一终端设备根据所述至少一个功率调整信息确定第二数据的发送功率；
    所述第一终端设备以所述发送功率向所述至少一个第二终端设备发送所述第二数据。
  2. 根据权利要求1所述的方法，其特征在于，
    所述第一终端设备根据所述至少一个功率调整信息确定第二数据的发送功率包括：
    所述第一终端设备根据所述至少一个功率调整信息的最大值、最小值、平均值、中位数值、众数值、4分位数值、几何平均值和调和平均值中的至少一个确定第一功率调整值；
    所述第一终端设备根据所述第一功率调整值确定第二数据的发送功率。
  3. 根据权利要求1-2任意一项所述的方法，其特征在于，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的，包括：
    所述至少一个功率调整信息为所述至少一个第二终端设备根据对所述第一数据和所述第一侧行控制信息中的至少一个的测量确定的，所述测量包括参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一个。
  4. 根据权利要求1-2任意一项所述的方法，其特征在于，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的，包括：
    所述至少一个功率调整信息是根据所述第一终端设备发送的功率指示信息确定的，所述功率指示信息包含在所述第一数据中或者包含在所述第一侧行控制信息中，所述功率指示信息用于指示所述第一数据和所述第一侧行控制信息中的至少一个的发送功率。
  5. 根据权利要求1-4任意一项所述的方法，其特征在于，
    所述功率调整信息用于指示功率增加、减小或不变中的至少一种。
  6. 一种第一终端设备，其特征在于，包括：
    发送单元，用于向至少一个第二终端设备发送第一数据和所述第一数据对应的第一侧行控制信息；
    接收单元，用于从所述至少一个第二终端设备接收至少一个功率调整信息，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的；
    确定单元，用于根据所述至少一个功率调整信息确定第二数据的发送功率；
    所述发送单元以所述发送功率向所述至少一个第二终端设备发送所述第二数据。
  7. 根据权利要求6所述的终端设备，其特征在于，
    所述确定单元根据所述至少一个功率调整信息确定第二数据的发送功率包括：
    所述确定单元根据所述至少一个功率调整信息的最大值、最小值、平均值、中位数值、众数值、4分位数值、几何平均值和调和平均值中的至少一个确定第一功率调整值；
    所述确定单元根据所述第一功率调整值确定第二数据的发送功率。
  8. 根据权利要求6-7任意一项所述的终端设备，其特征在于，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的，包括：
    所述至少一个功率调整信息为所述至少一个第二终端设备根据对所述第一数据和所述第一侧行控制信息中的至少一个的测量确定的，所述测量包括参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一个。
  9. 根据权利要求6-7任意一项所述的终端设备，其特征在于，所述至少一个功率调整信息为所述至少一个第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定的，包括：
    所述至少一个功率调整信息是根据所述发送单元发送的功率指示信息确定的，所述功率指示信息包含在所述第一数据中或者包含在所述第一侧行控制信息中，所述功率指示信息用于指示所述第一数据和所述第一侧行控制信息中的至少一个的发送功率。
  10. 根据权利要求6-9任意一项所述的终端设备，其特征在于，
    所述功率调整信息用于指示功率增加、减小或不变中的至少一种。
  11. 一种功率控制方法，其特征在于，包括：
    第二终端设备从第一终端设备接收第一数据和所述第一数据对应的第一侧行控制信息；
    所述第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息；
    所述第二终端设备向所述第一终端设备发送所述功率调整信息，所述功率调整信息用于所述第一终端设备确定第二数据的发送功率。
  12. 根据权利要求11所述的方法，其特征在于，所述第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息，包括：
    所述第二终端设备根据对所述第一数据和所述第一侧行控制信息中的至少一个的测量确定所述功率调整信息，所述测量包括参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一个。
  13. 根据权利要求11所述的方法，其特征在于，所述第二终端设备根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息，包括：
    所述第二终端设备根据从所述第一终端设备接收的功率指示信息确定所述功率调整信息，所述功率指示信息包含在所述第一数据中或者包含在所述第一侧行控制信息中，所述功率指示信息用于指示所述第一数据和所述第一侧行控制信息中的至少一个的发送功率。
  14. 根据权利要求11-13任意一项所述的方法，其特征在于，
    所述功率调整信息用于指示功率增加、减小或不变中的至少一种。
  15. 一种第二终端设备，其特征在于，包括：
    接收单元，用于从第一终端设备接收第一数据和所述第一数据对应的第一侧行控制信息；
    确定单元，用于根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息；
    发送单元，用于向所述第一终端设备发送所述功率调整信息，所述功率调整信息用于所述第一终端设备确定第二数据的发送功率。
  16. 根据权利要求15所述的终端设备，其特征在于，所述确定单元根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息，包括：
    所述确定单元根据对所述第一数据和所述第一侧行控制信息中的至少一个的测量确定所述功率调整信息，所述测量包括参考信号接收功率RSRP测量、参考信号接收质量RSRQ测量和接收信号强度指示RSSI测量中的至少一个。
  17. 根据权利要求15所述的终端设备，其特征在于，所述确定单元根据所述第一数据和所述第一侧行控制信息中的至少一个确定功率调整信息，包括：
    所述确定单元根据从所述第一终端设备接收的功率指示信息确定所述功率调整信息，所述功率指示信息包含在所述第一数据中或者包含在所述第一侧行控制信息中，所述功率指示信息用于指示所述第一数据和所述第一侧行控制信息中的至少一个的发送功率。
  18. 根据权利要求15-17任意一项所述的终端设备，其特征在于，
    所述功率调整信息用于指示功率增加、减小或不变中的至少一种。
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