power control method and terminal device

专利摘要:
A power control method and terminal device are disclosed. The method includes: sending, by a first terminal device, first data and first side link control information corresponding to the first data to at least a second terminal device; receiving, by the first terminal device, at least one piece of power adjustment information from the at least one second terminal device, where the at least one piece of power adjustment information is determined by at least one second terminal device based on at least least one of the first data and the first side link control information; determining, by the first terminal device, a transmission power for second data based on at least a piece of the power adjustment information; and sending, by the first terminal device, the second data to the at least one second terminal device at the transmission power. Therefore, the first terminal device can adjust, based on feedback from a receiving end, a power for sending data, thus improving the flexibility and precision of power control.
公开号:BR112020000374A2
申请号:R112020000374-3
申请日:2018-06-11
公开日:2020-07-14
发明作者:Zhenwei LU；Deping Liu；Lei Gao
申请人:Huawei Technologies Co., Ltd.；
IPC主号:

专利说明:

[0001] [0001] This application claims priority of Chinese Patent Application No. 201710567573.6, filed with the Chinese Patent Office on July 12, 2017 and entitled "POWER CONTROL METHOD AND TERMINAL DEVICE", which is incorporated herein by reference in its entirety. TECHNICAL FIELD
[0002] [0002] Modalities of this application refer to a communications system and, in particular, a power control method and a terminal device. BACKGROUND
[0003] [0003] Device to device communication (Device to Device, D2D), machine to machine communication (Machine to Machine, M2M), vehicle to vehicle communication (Vehicle to Vehicle, V2V), vehicle to pedestrian communication V2P (Vehicle to Pedestrian, V2P ) or vehicle-to-infrastructure / network V2I / N (Vehicle to Infrastructure / Network, V2I / N) is a technology for direct communication between terminal devices (ie, direct communication). V2V, V2P and V2I / N are collectively referred to as V2X, to be specific, a vehicle communicates with anything. In V2X communication, a transmitting end device can send data directly to a receiving end device, and a power at which the transmitting end device sends data is determined based on factors such as the device's maximum transmit power transmission endpoint, an amount of resource blocks occupied by the transmission end device to send the data, and an estimated path loss by the transmission end device. However, the method for determining the transmission power at which the transmission end device sends data is relatively fixed, and the transmission power of the transmission end device cannot be controlled flexibly and precisely. Therefore, a more flexible and accurate power control method in the industry is urgently needed. SUMMARY
[0004] [0004] The modalities of this order provide a power control method and a terminal device, to implement more flexible and precise power control in V2X communication.
[0005] [0005] According to a first aspect, a method of power control is provided. The method includes: sending, by a first terminal device, first data and first side link control information corresponding to the first data to at least a second terminal device; receiving, by the first terminal device, at least one piece of power adjustment information from the at least one second terminal device, where the at least one piece of power adjustment information is determined by at least one second terminal device based on at least least one of the first data and the first side link control information; determining, by the first terminal device, a transmission power for second data based on at least a piece of the power adjustment information; and sending, by the first terminal device, the second data to the at least one second terminal device at the transmission power.
[0006] [0006] The at least a second terminal device determines the power adjustment information based on at least one of the data and the control information that is received from the first terminal device, and sends the power adjustment information to the first terminal device ; and the first terminal device determines, based on the power adjustment information sent at least a second terminal device, the transmission power for the second data that must be sent, to be specific, the first terminal device can adjust, based on feedback from a receiving end, a power to send data, thus improving the flexibility and accuracy of power control.
[0007] [0007] In a possible design, the determination, by the first terminal device, of a transmission power for second data based on at least one piece of power adjustment information includes: determining, by the first terminal device, a first value of power adjustment based on at least one of a maximum value, a minimum value, an average value, a median value, a mode value, a quartile value, a geometric mean value and a harmonic mean value of at least one piece power adjustment information; and determining, by the first terminal device, the transmission power for the second data based on the first power adjustment value.
[0008] [0008] In a possible project, that at least one piece of power adjustment information is determined by at least one second terminal device based on at least one of the first data and the first side link control information includes: o at least a piece of power adjustment information is determined by at least a second terminal device based on the measurement on at least one of the first data and the first side link control information, where the measurement includes at least one measurement power received from RSRP reference signal, quality measurement received from RSRQ reference signal, and measurement of received signal strength indicator RSSI.
[0009] [0009] The at least one second terminal device determines the power adjustment information by measuring the first data and the first side link control information, to be specific, obtains the power adjustment information by measuring a signal that is actually received by the minus a second terminal device, so that the accuracy of the power adjustment can be improved.
[0010] [0010] In a possible project, that at least one piece of power adjustment information is determined by at least one second terminal device based on at least one of the first data and the first side link control information includes: at least one piece of power adjustment information is determined based on the power indication information sent by the first terminal device, where the power indication information is included in the first data or the first side link control information, and the information Power indication indicators are used to indicate a transmission power for at least one of the first data and the first side link control information.
[0011] [0011] That the at least a second terminal device determines the power adjustment information based on the power indication information sent by the first terminal device can simplify a method for determining the power adjustment information by the second terminal device.
[0012] [0012] In a possible project, the power adjustment information is used to instruct to perform at least one power increase, decrease or maintenance operation.
[0013] [0013] In a possible design, the first terminal device receives a parameter related to path loss from at least a second terminal device, where the parameter related to path loss is used by the first terminal device to determine the transmission power for the second data, and the parameter related to the path loss may be a transmission power of at least a second terminal device, or a value that is a path loss between the first terminal device and the at least a second terminal device and that at least one second terminal device is estimated.
[0014] [0014] According to a second aspect, a first terminal device is provided. The first terminal device includes: a sending unit, configured to send the first data and the first side link control information corresponding to the first data to at least a second terminal device; a receiving unit, configured to receive at least one piece of power adjustment information from the at least one second terminal device, wherein the at least one piece of power adjustment information is determined by at least one second terminal device on the basis of at least one of the first data and the first side link control information; and a determination unit, configured to determine a transmit power for second data based on at least one piece of power adjustment information, where the sending unit sends the second data to the at least one second terminal device on the power transmission.
[0015] [0015] The at least one second terminal device determines the power adjustment information based on at least one of the data and the control information that is received from the first terminal device, and sends the power adjustment information to the first terminal device ; and the first terminal device determines, based on the power adjustment information sent at least a second terminal device, the transmission power for the second data that must be sent, to be specific, the first terminal device can adjust, based on feedback from a receiving end, a power to send data, thus improving the flexibility and accuracy of power control.
[0016] [0016] In a possible design, the determination unit determines the transmission power for the second data based on the at least piece of power adjustment information includes: determining, by the determination unit, a first power adjustment value based on at least a maximum value, a minimum value, an average value, a median value, a mode value, a quartile value, a geometric mean value and a harmonic mean value of at least one piece of adjustment information of power; and determining, by the unit of determination, the transmission power for the second data based on the first power adjustment value.
[0017] [0017] In a possible project, that at least one piece of power adjustment information is determined by at least one second terminal device based on at least one of the first data and the first side link control information includes: o at least a piece of power adjustment information is determined by at least a second terminal device based on the measurement on at least one of the first data and the first side link control information, where the measurement includes at least one measurement power received from RSRP reference signal, quality measurement received from RSRQ reference signal, and measurement of received signal strength indicator RSSI.
[0018] [0018] The at least one second terminal device determines the power adjustment information by measuring the first data and the first side link control information, to be specific, obtains the power adjustment information by measuring a signal that is actually received by the minus a second terminal device, so that the accuracy of the power adjustment can be improved.
[0019] [0019] In a possible project, that at least one piece of power adjustment information is determined by at least one second terminal device based on at least one of the first data and the first side link control information includes: at least one piece of power adjustment information is determined based on the power indication information sent by the sending unit, where the power indication information is included in the first data or the first side link control information, and the information Power indication indicators are used to indicate a transmission power for at least one of the first data and the first side link control information.
[0020] [0020] That the at least one second terminal device determines the power adjustment information based on the power indication information sent by the first terminal device can simplify a method for determining the power adjustment information by the second terminal device.
[0021] [0021] In a possible project, the power adjustment information is used to instruct to perform at least one power increase, decrease or maintenance operation.
[0022] [0022] In a possible design, the first terminal device receives a parameter related to path loss from at least a second terminal device, where the parameter related to path loss is used by the first terminal device to determine the transmission power for the second data, and the parameter related to the path loss may be a transmission power of at least a second terminal device, or a value that is a path loss between the first terminal device and the at least a second terminal device and that at least one second terminal device is estimated.
[0023] [0023] In a possible design, the sending unit can be a transmitter or transceiver, the processing unit can be a processor and the receiving unit can be a receiver or a transceiver.
[0024] [0024] According to a third aspect, a power control method is provided. The method includes: receiving, by a second terminal device, the first data and the first side link control information corresponding to the first data of a first terminal device; determine, by the second terminal device, power adjustment information based on at least one of the first data and the first side link control information; and sending, through the second terminal device, 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 for second data.
[0025] [0025] The at least a second terminal device determines the power adjustment information based on at least one of the data and the control information that is received from the first terminal device, and sends the power adjustment information to the first terminal device ; and the first terminal device determines, based on the power adjustment information sent at least a second terminal device, the transmission power for the second data that must be sent, to be specific, the first terminal device can adjust, based on feedback from a receiving end, a power to send data, thus improving the flexibility and accuracy of power control.
[0026] [0026] In a possible project, the determination, by the second terminal device, of power adjustment information based on at least one of the first data and the first side link control information include: determining, by the second terminal device, information of power adjustment based on the measurement on at least one of the first data and the first side link control information, where the measurement includes at least one of the power measurement received from the RSRP reference signal, the quality measurement received from reference signal RSRQ, and the measurement of signal strength indicator received RSSI.
[0027] [0027] The at least one second terminal device determines the power adjustment information by measuring the first data and the first side link control information, to be specific, obtains the power adjustment information by measuring a signal that is actually received by the minus a second terminal device, so that the accuracy of the power adjustment can be improved.
[0028] [0028] In a possible project, the determination, by the second terminal device, of power adjustment information based on at least one of the first data and the first side link control information includes: determining, by the second terminal device, information power adjustment settings based on the power indication information received from the first terminal device, where the power indication information is included in the first data or the first side link control information, and the power indication information is used to indicate a transmission power for at least one of the first data and first side link control information.
[0029] [0029] That the at least one second terminal device determines the power adjustment information based on the power indication information sent by the first terminal device can simplify a method for determining the power adjustment information by the second terminal device.
[0030] [0030] In a possible project, the power adjustment information is used to instruct to perform at least one power increase, decrease or maintenance operation.
[0031] [0031] In a possible design, at least a second terminal device sends a parameter related to path loss to the first terminal device, where the parameter related to path loss is used by the first terminal device to determine the transmission power for the second data, and the parameter related to the path loss may be a transmission power of the at least a second terminal device, or a value that is a path loss between the first terminal device and the at least a second terminal device and that at least one second terminal device is estimated.
[0032] [0032] According to a fourth aspect, a second terminal device is provided. The second terminal device includes: a receiving unit, configured to receive the first data and the first side link control information corresponding to the first data of a first terminal device; a determination unit, configured to determine power adjustment information based on at least one of the first data and first side link control information; and a sending unit, 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 transmission power for second data.
[0033] [0033] The at least a second terminal device determines the power adjustment information based on at least one of the data and the control information that is received from the first terminal device, and sends the power adjustment information to the first terminal device ; and the first terminal device determines, based on the power adjustment information sent at least a second terminal device, the transmission power for the second data that must be sent, to be specific, the first terminal device can adjust, based on feedback from a receiving end, a power to send data, thus improving the flexibility and accuracy of power control.
[0034] [0034] In a possible project, the determination unit determines the power adjustment information based on at least one of the first data and the first side link control information includes: determining, by the unit of determination, the information of power adjustment based on the measurement on at least one of the first data and the first side link control information, where the measurement includes at least one of the power measurement received from the RSRP reference signal, the quality measurement received from the signal reference RSRQ, and the measurement of signal strength indicator received RSSI.
[0035] [0035] The at least one second terminal device determines the power adjustment information by measuring the first data and the first side link control information, to be specific, obtains the power adjustment information by measuring a signal that is actually received by the minus a second terminal device, so that the accuracy of the power adjustment can be improved.
[0036] [0036] In a possible project, the determination unit determines the power adjustment information based on at least one of the first data and the first side link control information includes: determining, by the determination unit, adjustment information based on the power indication information received from the first terminal device, where the power indication information is included in the first data or the first side link control information, and the power indication information is used to indicate a power transmission for at least one of the first data and first side link control information.
[0037] [0037] That the at least a second terminal device determines the power adjustment information based on the power indication information sent by the first terminal device can simplify a method for determining the power adjustment information by the second terminal device.
[0038] [0038] In a possible project, the power adjustment information is used to instruct to perform at least one power increase, decrease or maintenance operation.
[0039] [0039] In a possible design, the at least a second terminal device sends a parameter related to path loss to the first terminal device, where the parameter related to path loss is used by the first terminal device to determine the transmission power for the second data, and the parameter related to the path loss may be a transmission power of the at least a second terminal device, or a value that is a path loss between the first terminal device and the at least a second terminal device and that at least one second terminal device is estimated.
[0040] [0040] In a possible design, the sending unit can be a transmitter or transceiver, the processing unit can be a processor and the receiving unit can be a receiver or a transceiver.
[0041] [0041] According to a fifth aspect, one modality of this request provides a chip, configured to execute a program designed for the previous aspects.
[0042] [0042] According to a sixth aspect, one embodiment of this application provides a computer storage medium, configured to store a computer software instruction used by the previous terminal device. The computer's storage medium includes a program designed to perform the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS
[0043] [0043] FIG. 1 is a schematic diagram of unicast or multicast communication in V2X communication according to one embodiment of this request;
[0044] [0044] FIG. 2 is a flow chart of a power control method according to an embodiment of this order;
[0045] [0045] FIG. 3 is a schematic diagram of a power control method according to an embodiment of this application;
[0046] [0046] FIG. 4 shows a terminal device according to an embodiment of this application; and
[0047] [0047] FIG. 5 shows another terminal device according to an embodiment of this application. DESCRIPTION OF THE MODALITIES
[0048] [0048] FIG. 1 is a schematic diagram of unicast or multicast communication in V2X communication. For multicast communication, a terminal 1 sends data from terminal 1 to some terminal devices around terminal 1 instead of all terminal devices around terminal 1. For example, terminal device 1 sends multicast data to a terminal device 2, a terminal device 3 and a terminal device 4, and multicast data can include, for example, speed information, location information and direction information from terminal device 1. Terminal device 1 can notify other terminal devices 2 to 4 at around the terminal device 1 of the preceding information from the terminal device 1 in a direct way of communicating, to help the other terminal devices 2 to 4 make a direction decision, for example, by adjusting a speed, a location and a moving direction, to improve the reliability and stability of the terminal in a steering process. For unicast communication, terminal device 1 only needs to send data to a terminal around terminal 1, for example, terminal device 2, but it does not send data to terminal device 3 or terminal device 4. A frequency feature of time used by terminal device 1 to send unicast data to terminal device 2 or a time frequency resource used by terminal device 1 to send multicast data to terminal devices 2 to 4 can be allocated by a network device access to terminal device 1 or can be selected autonomously by terminal device 1.
[0049] [0049] The access network device in this application is a device implanted in a radio access network and configured to provide a wireless communication function to a terminal device. The access network device can include base stations (Base Station, BS) in various ways, for example, a macro base station, a micro station, a relay station or an access point. In systems using different radio access technologies, the names of devices that have an access network device function may be different. For example, the device is an access network device on a fifth generation 5G network; the device is referred to as an evolved NodeB (evolved NodeB, eNB or eNodeB for short) on an LTE network; the device is referred to as a NodeB (Node B) or similar on a third generation 3G network; or the device is a road side unit (Road Side Unit, MSW) in V2V communication. To facilitate description, in this application, devices that provide a wireless communication function to a terminal device are collectively referred to as an access network device.
[0050] [0050] The terminal device in this application may include several portable devices with a wireless communication function, for example, a vehicle-mounted device, a wearable device, a computing device, another processing device connected to a wireless modem, a mobile station (mobile station, MS), a terminal (terminal) or user equipment (User Equipment). To facilitate description, in this application, the devices mentioned above are collectively referred to as a terminal device.
[0051] [0051] The modalities of this request are described below in more detail with reference to specific examples.
[0052] [0052] FIG. 2 shows a power adjustment method and a terminal device according to an embodiment of this application. Specific steps are as follows:
[0053] [0053] Step 21: A terminal device 1 sends the first data and the first side link control information (Sidelink Control Information, SCI) corresponding to the first data to at least one second terminal device. An example in which the at least one second terminal device is three second terminal devices is used for description, and details are shown in FIG. 3. Certainly, the at least one second terminal device can be one, two, three or more second terminal devices. A terminal device 2, a terminal device 3 and a terminal device 4 separately receive the first data and the first side link control information corresponding to the first data of the terminal device 1.
[0054] [0054] The first data sent by terminal device 1 is determined by an application layer. For example, the first data may include speed information, location information, and direction information from the end device 1. The first side link control information includes at least time frequency resource indication information to send the first data and a modulation and encoding format of the first data.
[0055] [0055] Step 22: Terminal device 2, terminal device 3 and terminal device 4 respectively determine the power adjustment information based on at least one of the first data and the first side link control information.
[0056] [0056] Specifically, terminal device 2 can determine power adjustment information 2 based on the first data or control information from the first side link, or terminal device 2 can determine power adjustment information 2 based on first data and the first side link control information. Terminal device 3 can determine power adjustment information 3 based on the first data or the first side link control information, or terminal device 3 can determine power adjustment information 3 based on the first data and the first data side link control information. Terminal device 4 can determine power adjustment information 4 based on the first data or control information from the first side link, or terminal device 4 can determine power adjustment information 4 based on the first data and the first side link control information. Alternatively, terminal device 2 can determine power adjustment information 2 based on a plurality of pieces of data and / or a plurality of pieces of side link control information received from terminal device 1, or the terminal device can determining the power setting information 2 based on a plurality of pieces of data and / or a plurality of pieces of side link control information that are received from terminal device 1 within a period of time. The ways of determining power adjustment information 3 and power adjustment information 4 by terminal device 3 and terminal device 4 are similar to the way of determining power adjustment information 2 by terminal device 2, and the details do not. are described again.
[0057] [0057] Terminal device 2 is used as an example to describe how a terminal device determines power adjustment information. Terminal device 2 can determine power adjustment information 2 based on at least one power measurement received from RSRP reference signal, quality measurement received from RSRQ reference signal, and signal strength indicator measurement received RSSI on at least one of the first data and the first side link control information. In a possible implementation, when a measurement result is greater than or equal to a first threshold,
[0058] [0058] The power adjustment information is used to instruct to perform at least one augmentation operation,
[0059] [0059] The terminal device 2 can alternatively determine the power adjustment information 2 based on the power indication information included in the first data or included in the first side link control information. The power indication information is used to indicate a transmission power for at least one of the first data and the first side link control information. Terminal device 2 can determine power adjustment information 2 based on the transmit power for at least one of the first data and the first side link control information. Specifically, terminal device 2 can determine a free power gap from terminal device 1 based on the power control information, to determine the power setting information 2. For example, terminal device 2 always selects, as setting information of power, less of the power adjustment information and the free power space determined based on the measurement. Optionally, the power indication information contained herein can alternatively be used to indicate a free power space for at least one of the first data and the first side link control information.
[0060] [0060] Step 23: Terminal device 2 sends power adjustment information 2 to terminal device 1, terminal device 3 sends power adjustment information 3 to terminal device 1, and terminal device 4 sends information power adjustment 4 for terminal device 1; and terminal device 1 receives power adjustment information 2 from terminal device 2, terminal device 1 receives power adjustment information 3 from terminal device 3, and terminal device 1 receives power adjustment information 4 from device terminal 4. The power adjustment information sent by terminal devices 2 to 4 respectively to terminal device 1 can be included in the physical layer signaling, such as SCI, or can be sent via another physical channel, such as a physical feedback channel , or can be included in upper layer signaling as a control element for access control to the medium (MAC Control Element, MAC CE). In the following, terminal device 2 is an example for description. If the power adjustment information is included in the SCI, a single piece of SCI can be sent by terminal device 2 to terminal device 1 without corresponding data transmission, or when terminal device 2 sends data to terminal device 1, the power adjustment information can be included in the SCI corresponding to the data.
[0061] [0061] Terminal device 2 can also display power adjustment information for a plurality of other terminal devices on SCI or MAC CE. For example, the terminal device 2 receives the first data and the first side link control information from the terminal device 1 and the terminal device 2 also receives third data and third control information from the terminal device 3; and then terminal device 2 determines power adjustment information 21 based on at least one of the first data and the first side link control information, and terminal device 2 further determines power adjustment information 22 based on at least one of the third data and the third side link control information. In that case, terminal device 2 adds power adjustment information 21 and power adjustment information 22 to SCI or MAC CE. Specifically, for example, four bits in the SCI or MAC CE can be used to indicate the power setting information 21 and the power setting information 22. Terminal device 2 can determine, in descending order, the sequence numbers of the others terminal devices (certainly, or in another order), that the first two bits of the four bits are used to indicate the power setting information 22 of the terminal device 3, and the last two bits are used to indicate the power setting information 21 of the terminal device 1. The MAC CE may include a plurality of bits to indicate IDs (e.g., intra-group IDs or UEs ID) of the plurality of other terminal devices and the power adjustment information corresponding to the plurality of other terminal devices.
[0062] [0062] Step 24. Terminal device 1 determines a transmission power for second data based on power adjustment information 2, power adjustment information 3 and power adjustment information
[0063] [0063] There are a plurality of ways to determine, by the terminal device 1, the transmission power for the second data based on the power adjustment information 2, the power adjustment information 3 and the power adjustment information 4. For example, terminal device 1 can determine a first power adjustment value based on at least one of a maximum value, a minimum value, an average value, a median value, a median value, a mode value, a value quartile, a geometric mean value and a harmonic mean value of the power adjustment information 2, the power adjustment information 3 and the power adjustment information 4, and then the terminal device 1 determines the transmission power for the second data based on the first power adjustment value. For example, power adjustment information 2 is used to instruct to increase the transmit power of terminal device 1 by 3 db, power adjustment information 3 is used to instruct to decrease the transmit power of terminal device by 1 db and terminal device 1 determines a power adjustment value based on power adjustment information 2 and power adjustment information 3. Specifically, a maximum value, for example, max {3 db, –1 db} = 3 db can be used; or a minimum value, min {3 db, –1 db} = -1 db can be used; or an average value, for example, average {3 db, –1 db} = 1 db can be used.
[0064] [0064] The transmission power for the second data can be expressed using the following formula. For example, the transmission power for the second data meets the following formula: PPSSCH = min {PCMAX, PSSCH, 10 log10 (M PSSCH) + PO_PSSCH + α PSSCH ⋅ PL + δ PSSCH}, or
[0065] [0065] PL can be estimated by terminal device 1 based on a downlink signal, and is not a real loss of path from a side link. In unicast and multicast communication, terminal device 1 and terminal device 2 are used as an example for description. To allow terminal device 1 to more accurately estimate a loss of path between terminal device 1 and terminal device 2, terminal device 2 can send a parameter related to the loss of path to terminal device 1 to assist terminal device 1 in loss of path estimation and more precise power adjustment. In a possible way, the parameter related to the loss of path is a real transmission power of the terminal device 2. In another possible way, the parameter related to the loss of path is a loss of path that is between the terminal device 2 and the device terminal 1 and that is estimated by the terminal device 2. Specifically, the terminal device 1 sends, to the terminal device 2, a real transmission power in which the terminal device 1 sends data, and the actual transmission power can be sent in SCI or on a MAC CE. In this case, the terminal device 2 can estimate the path loss between the terminal device 1 and the terminal device 2 based on the actual transmission power and then send the path loss to the terminal device 1, to assist the UE 1 in the loss of path estimation and power adjustment.
[0066] [0066] Particularly, in multicast communication, terminal device 1 can obtain a plurality of estimated values of path loss between terminal device 1 and other terminal devices. For example, terminal device 1 obtains a path loss value between terminal device 1 and terminal device 2 and a path loss value between terminal device 1 and terminal device 3. These path loss values can be estimated by terminal device 1 or can be sent by terminal device 2 or terminal device 3 to terminal device 1. Terminal device 1 needs to combine the plurality of path loss values into a path loss value for subsequent adjustment in power multicast data transmission. One way of specific determination is that a maximum value, a minimum value, an average value or a weighted average value of the plurality of path loss values can be used. Alternatively, a specific way of determining may be another way. For example, a median,
[0067] [0067] Terminal device 1 also sends SCI when sending the second data. The SCI is used to indicate information as a time frequency resource and a modulation and encoding format for sending the second data. The method for determining the transmit power for the second data in step 24 can also be used to determine a transmit power for the SCI. In a possible way, if the same power adjustment information is used for SCI and data, terminal device 2 and terminal device 3 need to send only a piece of power adjustment information to SCI or data. In another possible way, different power adjustment information is used for the SCI and the data, and the power adjustment information for one of the SCI and the data can be determined based on the power adjustment information for the other SCI and the data. For example, the power adjustment information for the SCI can be determined based on the power adjustment information in the data. In this case, terminal device 2 and terminal device 3 need to send only one piece of power adjustment information to the SCI or the data. In yet another possible way, different power adjustment information is used for SCI and data, and terminal device 2 and terminal device 3 must send power adjustment information to SCI and data respectively.
[0068] [0068] In a unicast communication scenario,
[0069] [0069] In the multicast communication scenario, it is assumed that the terminal device 1 receives the power adjustment information sent by the terminal device 2 and the power adjustment information sent by the terminal device 3, but the two pieces of information may not be sent at the same time. For example, terminal device 1 receives, in subframes n1, the power adjustment information sent by UE 2 and receives, in subframes n2, power adjustment information sent by terminal device 3. The two pieces of information of power settings correspond, respectively, to effective time intervals [n1 + T1, n1 + T2] and [n2 + T1 ', n2 + T2'], where T1, T2, T1 'and T2' can have the same value or can be different values. When terminal device 1 still needs to send multicast data to terminal device 2 and terminal device 3 in subframes m, the corresponding power adjustment information is valid only when subframes m is in the effective time range. For example, if subframe m is within the two effective time bands, the two pieces of power adjustment information sent by terminal device 2 and terminal device 3 are valid. For example, when subframes m is within only one of the effective time bands, for example, subframes m is only within [n2 + T1 ', n2 + T2'], only the power adjustment information sent by the device terminal 3 are valid, and the power adjustment information sent by terminal device 2 is invalid. If there is no valid power adjustment information in the subframes in which the terminal device 1 sends the data, the terminal device 1 can send the data with a maximum transmission power or a transmission power is determined by removing f (i) from the formula of step 24.
[0070] [0070] Step 25: Terminal device 1 sends the second data to terminal devices 2 to 4 at the transmission power determined in step 24.
[0071] [0071] According to this modality of this request, the terminal devices 2 to 4 determine the power adjustment information based on at least one of the data and the control information received from the terminal device 1, and send the adjustment information of power to terminal device 1; and the terminal device 1 determines, based on the power adjustment information sent by the terminal devices 2 to 4, the transmission power for the second data that must be sent, to be specific, the terminal device 1 can adjust, based on feedback from a receiving end, a power to send data, thus improving the flexibility and accuracy of power control.
[0072] [0072] FIG. 4 is a possible schematic structural diagram of a terminal device 1 configured to perform the method in the embodiment in FIG. 2. Terminal device 1 includes a sending unit 401, a receiving unit 402 and a determining unit 403.
[0073] [0073] The sending unit 401 is configured to send the first data and the first side link control information corresponding to the first data to the terminal devices 2 to 4. The first data and the first side link control information are consistent. with those of the modality in FIG. 2, and the details are not described again.
[0074] [0074] Receiving unit 402 is configured to receive power adjustment information 2 to 4 from terminal devices 2 to 4, where power adjustment information 2 to 4 is determined by terminal devices 2 to 4 based on at least one of the first data and first side link control information.
[0075] [0075] The determination unit 403 is configured to determine a transmission power for second data based on the power setting information 2 to 4. The second data and the transmission power for the second data are consistent with those of the modality in FIG. 2, and the details are not described again. Determination unit 403 determines the transmit power for the second data based on the power setting information 2, the power setting information 3 and the power setting information 4 in a plurality of ways. For example, the determination unit 403 can determine a first power adjustment value based on at least one of a maximum value, a minimum value, an average value, a median value, a median value, a mode value, a quartile value, geometric mean value and harmonic mean value of power adjustment information 2, power adjustment information 3 and power adjustment information 4, and then terminal device 1 determines the transmit power for the second data based on the first power adjustment value.
[0076] [0076] The sending unit 401 is further configured to send the second data to the terminal devices 2 to 4 at the transmission power determined by the determination unit 403.
[0077] [0077] The sending unit 401 can be a transmitter or a transceiver, the receiving unit 402 can be a receiver or a transceiver, and the determining unit 403 can be a processor. In addition, the terminal device may also include a memory, and the memory is configured to store the program code and data of the terminal device.
[0078] [0078] According to this modality of this request, the terminal devices 2 to 4 determine the power adjustment information based on at least one of the data and the control information received from the terminal device 1, and send the adjustment information of power to terminal device 1; and the terminal device 1 determines, based on the power adjustment information sent by the terminal devices 2 to 4, the transmission power for the second data that must be sent, to be specific, the terminal device 1 can adjust, based on feedback from a receiving end, a power to send data, thus improving the flexibility and accuracy of power control.
[0079] [0079] FIG. 5 is a possible schematic structural diagram of a terminal device 2 configured to perform the method in the embodiment in FIG. 2. The terminal device 2 includes a receiving unit 501, a determining unit 502 and a sending unit 503. Certainly, each of a terminal device 3 and a terminal device 4 has the same structure as the terminal device 2 and the details are not described again.
[0080] [0080] The receiving unit 501 is configured to receive the first data and the first side link control information corresponding to the first data of a terminal device 1. The first data and the first side link control information are consistent with the of the embodiment in FIG. 2, and the details are not described again.
[0081] [0081] The determination unit 502 is configured to determine power adjustment information based on at least one of the first data and first side link control information.
[0082] [0082] Specifically, the determination unit 502 can determine power adjustment information 2 based on the first data or the first side link control information, or the determination unit 502 can determine power adjustment information 2 based on the first data and the first side link control information.
[0083] [0083] Determination unit 502 can determine power adjustment information 2 based on at least one power measurement received from RSRP reference signal, quality measurement received from RSRQ reference signal, and indicator measurement signal strength received RSSI in at least one of the first data and the first side link control information. When a measurement result is greater than a first limit, the determination unit 502 determines that the power setting information 2 is used to instruct a power to decrease; when a measurement result is less than a second limit, the determination unit 502 determines that the power setting information 2 is used to instruct to increase a power; or when a measurement result is between a first and a second limit, a power is maintained. The first limit and the second limit can be configured by an access network device and sent to terminal device 1, or they can be preconfigured in a protocol or standard.
[0084] [0084] The determination unit 502 can alternatively determine the power adjustment information 2 based on the power indication information included in the first data or included in the first side link control information, in which the indication information of power power are used to indicate a transmission power for at least one of the first data and the first side link control information. The determination unit 502 can determine the power setting information 2 based on the transmit power for at least one of the first data and the first side link control information.
[0085] [0085] 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 transmission power for second data. The second data and the transmission power for the second data are consistent with those of the modality in FIG. 2, and the details are not described again.
[0086] [0086] The receiving unit 501 can be a receiver or a transceiver, the determining unit 502 can be a processor and the sending unit 503 can be a transmitter or a transceiver. In addition, the terminal device may also include a memory, and the memory is configured to store the program code and data of the terminal device.
[0087] [0087] According to this modality of this order, the terminal devices 2 to 4 determine the power adjustment information based on at least one of the data and the control information received from the terminal device 1, and send the adjustment information of power to terminal device 1; and the terminal device 1 determines, based on the power adjustment information sent by the terminal devices 2 to 4, the transmission power for the second data that must be sent, to be specific, the terminal device 1 can adjust, based on feedback from a receiving end, a power to send data, thus improving the flexibility and accuracy of power control.
[0088] [0088] In the various embodiments provided in this application, it should be understood that the system, apparatus and method disclosed can be implemented in other ways. For example, the apparatus modalities described above are merely examples. For example, the unit division is merely a logical function division and can be another division in real implementations. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not implemented. In addition, the mutual couplings displayed or discussed, direct couplings or communication connections can be implemented using some interfaces. Indirect couplings or communication connections between devices or units can be implemented in electronic, mechanical or other forms.
[0089] [0089] The units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one position, or may be distributed in a plurality of network units. Some or all of the units can be selected based on actual requirements to achieve the objectives of the modalities solutions.
[0090] [0090] In addition, the functional units in the embodiments of this application can be integrated into a processing unit, or each of the units can exist physically alone, or two or more units can be integrated into one unit. The integrated unit can be implemented in a form of hardware or it can be implemented in the form of a functional software unit.
[0091] [0091] When the integrated unit is implemented as a functional software unit and sold or used as a standalone product, the integrated unit can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions in this application essentially, or the part that contributes to the prior art, or all or some of the technical solutions can be implemented in the form of a software product. The computer software product is stored on a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server or a network device) to perform all or some of the steps in the methods described in modalities section of this application. The previous storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard drive, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk.

权利要求:
Claims (18)
[1]
1. Power control method, characterized by the fact that it comprises: sending, through a first terminal device, first data and first side link control information that correspond to the first data to at least a second terminal device; receive, by the first terminal device, at least one piece of power adjustment information from the at least one second terminal device, wherein the at least one piece of power adjustment information is determined by at least one second terminal device based on at least one of the first side link control data and information; determining, by the first terminal device, a transmission power for second data based on at least one piece of power adjustment information; and sending, by the first terminal device, the second data to at least one second terminal device at the transmission power.
[2]
2. Method according to claim 1, characterized by the fact that the determination, by the first terminal device, of a transmission power for second data based on at least one piece of power adjustment information comprises: determining, at least first terminal device, a first power adjustment value based on at least one of a maximum value, a minimum value, an average value, a median value, a mode value, a mode value, a quartile value, a geometric mean value and a harmonic mean value of at least one piece of power adjustment information; and determining, by the first terminal device, the transmission power for the second data based on the first power adjustment value.
[3]
3. Method according to claim 1 or 2, characterized by the fact that the at least one piece of power adjustment information is determined by at least one second terminal device based on at least one of the first data and the first side link control information comprises: the at least one piece of power adjustment information is determined by at least one second terminal device based on the measurement in at least one of the first data and first side link control information, in that the measurement comprises at least one of power measurement received from RSRP reference signal, quality measurement received from RSRQ reference signal, and measurement of RSSI received signal strength indicator.
[4]
4. Method according to claim 1 or 2, characterized by the fact that the at least one piece of power adjustment information is determined by at least one second terminal device based on at least one of the first data and the first side link control information comprises: the at least one piece of power adjustment information is determined based on the power indication information sent by the first terminal device, where the power indication information is comprised in the first data or in the first side link control information, and the power indication information is used to indicate a transmit power for at least one of the first side link control data and data.
[5]
Method according to any one of claims 1 to 4, characterized in that the power adjustment information is used to instruct to perform at least one power increase, decrease or maintenance operation.
[6]
6. First terminal device, characterized by the fact that it comprises: a sending unit, configured to send first data and first side link control information corresponding to the first data to at least a second terminal device; a receiving unit, configured to receive at least one piece of power adjustment information from the at least one second terminal device, wherein the at least one piece of power adjustment information is determined by at least one second terminal device on the basis of in at least one of the first data and the first side link control information; and a determination unit, configured to determine a transmit power for second data based on at least one piece of power adjustment information, where the sending unit sends the second data to the at least one second terminal device on the power transmission.
[7]
7. Terminal device according to claim 6, characterized in that the determination unit determines the transmission power for the second data based on at least one piece of power adjustment information comprises: determining, by the unit of determination, a first power adjustment value based on at least one of a maximum value, a minimum value, an average value, a median value, a mode value, a mode value, a quartile value, a value geometric mean and a harmonic mean value of at least one piece of power adjustment information; and determining, by the unit of determination, the transmission power for the second data based on the first power adjustment value.
[8]
8. Terminal device according to claim 6 or 7, characterized in that the at least one piece of power adjustment information is determined by at least one second terminal device based on at least one of the first data and the first side link control information comprises: the at least one piece of power adjustment information is determined by at least one second terminal device based on the measurement on at least one of the first data and first side link control information, wherein the measurement comprises at least one of power measurement received from RSRP reference signal, quality measurement received from RSRQ reference signal, and measurement of RSSI received signal strength indicator.
[9]
9. Terminal device according to claim
6 or 7, characterized by the fact that the at least one piece of power adjustment information is determined by at least one second terminal device based on at least one of the first data and the first side link control information comprises: the at least one piece of power adjustment information is determined based on the power indication information sent by the sending unit, where the power indication information is comprised in the first data or the first side link control information, and the power indication information is used to indicate a transmission power for at least one of the first side link control data and data.
[10]
Terminal device according to any one of claims 6 to 9, characterized in that the power adjustment information is used to instruct to perform at least one power increase, decrease or maintenance operation.
[11]
11. Power control method, characterized by the fact that it comprises: receiving, by a second terminal device, the first data and the first side link control information corresponding to the first data from a first terminal device; determine, by the second terminal device, power adjustment information based on at least one of the first data and the first side link control information; and sending, through the second terminal device, 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 for second data.
[12]
12. Method, according to claim 11, characterized by the fact that the determination, by the second terminal device, of power adjustment information based on at least one of the first data and the first side link control information comprises: determine, by the second terminal device, the power adjustment information based on the measurement on at least one of the first data and on the first side link control information, where the measurement comprises at least one of the power measurement received from RSRP reference, quality measurement received from RSRQ reference signal, and measurement of received signal strength indicator RSSI.
[13]
13. Method, according to claim 11, characterized by the fact that the determination, by the second terminal device, of power adjustment information based on at least one of the first data and the first side link control information comprises: determine, by the second terminal device, the power adjustment information based on the power indication information received from the first terminal device, where the power indication information is included in the first data or included in the first side link control information , and the power indication information is used to indicate a transmission power for at least one of the first data and the first side link control information.
[14]
14. Method according to any one of claims 11 to 13, characterized in that the power adjustment information is used to instruct to perform at least one power increase, decrease or maintenance operation.
[15]
15. Second terminal device, characterized by the fact that it comprises: a reception unit, configured to receive the first data and the first side link control information corresponding to the first data of a first terminal device; a determination unit, configured to determine power adjustment information based on at least one of the first data and first side link control information; and a sending unit, 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 transmission power for second data.
[16]
16. Terminal device, according to claim 15, characterized by the fact that the determination unit determines the power adjustment information based on at least one of the first data and the first side link control information comprises: determining , by the unit of determination, the power adjustment information based on the measurement on at least one of the first data and on the first side link control information, where the measurement comprises at least one of the power measurement received from the reference signal RSRP, measurement of received quality of RSRQ reference signal, and measurement of received signal strength indicator RSSI.
[17]
17. Terminal device, according to claim 15, characterized by the fact that the determination unit determines the power adjustment information based on at least one of the first data and the first side link control information comprises: determining , by the unit of determination, the power adjustment information based on the power indication information received from the first terminal device, in which the power indication information is included in the first data or included in the first side link control information, and the power indication information is used to indicate a transmission power for at least one of the first data and the first side link control information.
[18]
18. Terminal device according to any one of claims 15 to 17, characterized in that the power adjustment information is used to instruct to perform at least one power increase, decrease or maintenance operation.

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法律状态:
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