WO2021022415A1 - Procédé de réglage de puissance et appareil terminal - Google Patents

Procédé de réglage de puissance et appareil terminal Download PDF

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Publication number
WO2021022415A1
WO2021022415A1 PCT/CN2019/099090 CN2019099090W WO2021022415A1 WO 2021022415 A1 WO2021022415 A1 WO 2021022415A1 CN 2019099090 W CN2019099090 W CN 2019099090W WO 2021022415 A1 WO2021022415 A1 WO 2021022415A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
signal
control command
power
service
Prior art date
Application number
PCT/CN2019/099090
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English (en)
Chinese (zh)
Inventor
邢金强
Original Assignee
Oppo广东移动通信有限公司
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.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2019/099090 priority Critical patent/WO2021022415A1/fr
Priority to CN201980093552.2A priority patent/CN113508623B/zh
Publication of WO2021022415A1 publication Critical patent/WO2021022415A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the communication field, and more specifically, to a method and terminal device for adjusting power.
  • the terminal equipment In a side-line communication system, the terminal equipment usually transmits at a fixed transmission power, for example, the maximum transmission power or the transmission power generated by the network equipment configured with related power parameters. This method may cause the terminal equipment to continue to use different transmission power.
  • the appropriate transmission power affects the communication performance.
  • the embodiments of the present application provide a method for adjusting power and a terminal device.
  • the power is continuously adjusted through a power negotiation mechanism between terminal devices, which is beneficial for the terminal device to transmit signals with appropriate transmission power, thereby improving communication performance.
  • a method for power adjustment includes: a first terminal device receives a first signal sent by a second terminal device; and the first terminal device sends the signal to the second terminal device according to the first signal.
  • the terminal device sends a power control command, where the power control command is used to adjust the transmission power of the second terminal device.
  • a method for power adjustment includes: a second terminal device sends a first signal to a first terminal device; and the second terminal device receives the first terminal device based on the first signal A first power control command sent, where the first power control command is used to adjust the transmission power of the second terminal device.
  • a terminal device which is used to execute any one of the foregoing first aspect to the second aspect or the method in its implementation manner.
  • the terminal device includes a functional module for executing any one of the above-mentioned first aspect to the second aspect or a method in an implementation manner thereof.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute any one of the first aspect to the second aspect or the method in the implementation manner thereof.
  • a chip is provided for implementing any one of the above-mentioned first to second aspects or the method in each implementation manner thereof.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes any one of the above-mentioned first aspect to the second aspect or any of the implementations thereof method.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner thereof.
  • a computer program product including computer program instructions, which cause a computer to execute any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.
  • a computer program which, when run on a computer, causes the computer to execute any one of the above-mentioned first to second aspects or the method in each of its implementation modes.
  • the receiving end terminal device can feed back the corresponding power control command to the transmitting end terminal device according to the received signal, so that the transmitting end terminal device can accurately adjust the transmission power according to the feedback of the receiving end terminal device, thereby enabling power adjustment Reaching a closed-loop control process is conducive to the terminal equipment using appropriate transmission power to transmit signals, thereby improving communication performance.
  • Fig. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • Fig. 2 is an interaction diagram of a power adjustment method provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a power adjustment method according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of a scenario of a distributed terminal device provided by an embodiment of the present application.
  • Fig. 5 is a schematic diagram of another scenario of a distributed terminal device provided by an embodiment of the present application.
  • Fig. 6 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
  • Fig. 8 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution LTE
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • NR New Radio
  • 5G System etc.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems based on non-orthogonal multiple access technologies, such as sparse code multiple access (SCMA) systems, low-density signatures (Low Density Signature, LDS) system, etc.
  • SCMA sparse code multiple access
  • LDS Low Density Signature
  • SCMA system and LDS system can also be called other names in the communication field;
  • technical solutions of the embodiments of this application can be applied to multi-carriers using non-orthogonal multiple access technology Transmission systems, such as non-orthogonal multiple access technology Orthogonal Frequency Division Multiplexing (OFDM), Filter Bank Multi-Carrier (FBMC), Generalized Frequency Division Multiplexing (Generalized Frequency Division Multiplexing) Frequency Division Multiplexing (GFDM), Filtered-OFDM (F-OFDM) systems, etc.
  • OFDM Orthogonal Frequency Division Multiplexing
  • FBMC Filter Bank Multi-Carrier
  • Generalized Frequency Division Multiplexing Generalized Frequency Division Multiplexing
  • GFDM Frequency Division Multiplexing
  • F-OFDM Filtered-OFDM
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network devices gNB in 5G networks, or network devices in the future evolution of public land mobile networks (Public Land Mobile Network, PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNB evolved base station
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices
  • the communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110.
  • terminal equipment includes but is not limited to User Equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, Terminal, wireless communication equipment, user agent or user device.
  • UE User Equipment
  • the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Terminal equipment, etc., are not limited in the embodiment of the present invention.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • direct terminal connection (Device to Device, D2D) or vehicle to everything (V2X) communication may be performed between the terminal devices 120.
  • This direct communication mode between the terminal device and the terminal device may be referred to as Sidelink (SL) communication.
  • the characteristic of this kind of communication is that the network device is no longer a control center, and the terminal device can communicate directly without a network. Taking the Internet of Vehicles as an example, vehicles can communicate with nearby vehicles for applications such as collision avoidance warning.
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • Figure 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the communication device may include a network device 110 with a communication function and a terminal device 120.
  • the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as a mobility management entity (Mobility Management Entity, MME), a serving gateway (Serving Gateway, S-GW), or a packet data gateway (PDN Gateway, P-GW), etc. This is not limited in the embodiments of this application.
  • MME mobility management entity
  • S-GW serving gateway
  • PDN Gateway Packed Data Gateway
  • the communication between the terminal equipment and the terminal equipment may not depend on the traditional cellular communication network, so the relationship between the cellular communication network and the terminal equipment may include: the terminal equipment is in the coverage area of the cellular network or the terminal equipment is not in the cellular network Within network coverage.
  • open loop power control can be used, that is, the network device controls the transmission power between the terminal device and the terminal device. Specifically, it can be calculated by the following formula:
  • P PSSCH min ⁇ P CMAX,PSSCH ,10log 10 (M PSSCH )+P o_PSSCH + ⁇ PSSCH .PL ⁇
  • P CMAX, PSSCH are the maximum transmit power of the terminal device
  • M PSSCH is the number of resource blocks (Resource Block, RB) occupied by the terminal device
  • P o_PSSCH is the open loop power parameter configured by the network device
  • ⁇ PSSCH is the network device configuration
  • the weighting factor of path loss, PL is the path loss.
  • the transmission power of the terminal device is not controlled by the network device, and the terminal device always uses the maximum transmission power for transmission.
  • the embodiment of the present application provides a method 200 for power adjustment, which can continuously adjust the transmission power through a power negotiation mechanism between terminal devices.
  • the method 200 includes the following parts: all content:
  • the second terminal device sends a first signal to the first terminal device; accordingly, the first terminal device receives the first signal sent by the second terminal device;
  • the first terminal device sends a power control command to the second terminal device based on the first signal; accordingly, the second terminal device receives the power control command sent by the first terminal device based on the first signal, and the power control command is used to adjust The transmit power of the second terminal device.
  • the first terminal device may serve as the receiving end
  • the second terminal device may serve as the sending end.
  • the sending end can send a signal to the receiving end
  • the receiving end generates and sends a power control command to the sending end based on the signal after receiving the signal sent by the sending end, for example, a command to increase the transmission power (referred to in this article)
  • the increase power control command ), the command to reduce the transmission power (that is, the decrease power control command mentioned in this article), or the command to keep the transmission power unchanged.
  • the transmitting end receives the power control command, the transmitting power can be adjusted accordingly for the next signal transmission.
  • the receiving end can feed back a power control command to the transmitting end after each signal is received; accordingly, the transmitting end can adjust the transmission power every time it receives a power control command fed back by the receiving end. So as to achieve real-time and precise control of the transmission power to improve communication performance.
  • the power control command fed back by the receiving end to the transmitting end may not only include simple instructions of increase, decrease, or change, but also increase the corresponding change value.
  • the power control command indicates to increase the transmission power, and may also indicate to increase the power of one step, where the power of one step may be configured in advance by the network device.
  • the power control command can also directly indicate an offset.
  • the embodiment of the present application does not limit the specific content included in the power control command.
  • the transmitting power of the transmitting end is not controlled by the network device, but directly adjusts the transmitting power according to the power control command fed back by the receiving end.
  • a possible implementation is that the network device configures the corresponding power control parameters for the transmitting end, such as the open loop power parameter or path loss weighting factor in the above formula. However, the transmitting end will ignore the power control parameters configured by the network device, and instead adjust the transmitting power according to the power control command fed back by the receiving end.
  • the sender can interact with the network device in advance to notify the network device that it does not need to configure corresponding power control parameters, and the sender can adjust the transmit power according to the power control command fed back by the receiver.
  • the first terminal device sending a power control command to the second terminal device according to the first signal includes: the first terminal device sends a power control command according to the first signal At least one of the first link quality information of the signal, the service priority information of the service to which the first signal belongs and the service priority information of the service to which the second signal belongs, and the interference situation between the first signal and the third signal, to the first signal
  • the second terminal device sends the power control command, and the second signal and the third signal are both signals of terminal devices other than the second terminal device received by the first terminal device.
  • the receiving end can refer to some information to generate the power control command.
  • the receiving end may obtain the link quality information of the first signal sent by the sending end, and judge whether the link quality indicated by the link quality information is good or bad. If the link quality is not good enough to meet certain conditions, the power control command generated by the receiving end can be an increase power control command; and if the link quality is good enough to meet certain conditions, then the power control command generated by the receiving end can be a decrease power control command.
  • the link quality information can be characterized by some parameters such as bit error rate, signal-to-noise ratio, or signal strength. Taking the bit error rate as an example, when the receiving end receives the first signal, it demodulates it and obtains the bit error rate information.
  • the receiving end thinks that the transmitting end should increase the transmission power, that is Feed back the increase power control command to the sending end; on the contrary, if the bit error rate is lower than a certain threshold, the receiving end thinks that the sending end should reduce the transmission power, that is, feed back the lower power control command to the sending end.
  • one threshold can be set for the bit error rate, or two thresholds can be set. The high threshold is used as a judgment basis for generating an increase power control command, and the low threshold is used as a judgment basis for generating a power reduction control command.
  • the receiving end can also first refer to the current movement information of the receiving end relative to the sending end, and then determine whether to generate a power reduction control command, for example, relative movement speed . If the relative movement information changes greatly, it can be considered that it is not suitable to reduce the transmission power of the transmitting end, that is, the power control command may not be fed back to the transmitting end. If the relative movement information does not change much, it is considered suitable to reduce the transmission power of the sending end, that is, the power reduction control command can be fed back to the sending end. By considering the relative movement information of the receiving end and the transmitting end, the link failure problem caused by the relative movement of the two changing too fast and the power reduction is too large is avoided.
  • a power reduction control command for example, relative movement speed
  • the receiving end may determine the relative movement information by observing changes in the transmitting power of the transmitting end (that is, the receiving power of the receiving end). For example, the receiving end can record the received power of the signal every time it receives a signal from the sending end. Specifically, the signal strength can be measured, such as acquiring reference signal receiving power (Reference Signal Receiving Power, RSRP), received signal strength indication (Received Signal Strength Indication, RSSI) and other parameters.
  • RSRP Reference Signal Receiving Power
  • RSSI received Signal Strength Indication
  • some conditions can also be set. For example, a threshold can be set for the relative movement speed. When the relative movement speed indicated by the acquired relative movement information is greater than or equal to the threshold, it can be considered that the relative movement between the receiving end and the sending end has changed too much; and when the acquired relative movement If the relative movement speed indicated by the information is less than the threshold, it can be considered that the relative movement between the receiving end and the sending end does not change much.
  • any information that can characterize the change of the relative movement between the receiving end and the transmitting end may be the relative movement information in the embodiment of the present application, and is not limited to the relative movement speed illustrated above.
  • the condition for judging whether the link quality is good or bad may be determined by a quality of service (Quality of Service, QoS) requirement. That is to say, the quality of the link indicated by the first link quality information of the first signal is judged by the QoS requirements corresponding to the service to which the first signal belongs.
  • QoS Quality of Service
  • the condition for judging whether the link quality is good or bad may also be a condition of network device reconfiguration or protocol re-arrangement.
  • the transmitting end can also send power headroom information to the receiving end, that is, report the adjusted transmit power The difference from the maximum transmit power. For example, if the adjusted transmission power is the maximum transmission power, the reported power headroom information is 0.
  • the process can include:
  • Terminal device A initially transmits a signal to terminal device B with a transmission power of 1;
  • the terminal device B receives and demodulates the signal transmitted by the terminal device A to obtain a bit error rate
  • the terminal device B sends a power increase control command to the terminal device A.
  • the transmission power 1 can be adjusted to the transmission power 2, and the transmission power 2 is higher than the transmission power 1.
  • S306 Determine whether the relative mobility of terminal device B and terminal device A is high
  • terminal device B sends a power reduction control command to terminal device A.
  • the transmission power 1 can be adjusted to the transmission power 3, and the transmission power 3 is lower than the transmission power. Power 1;
  • the terminal device A may adjust the transmission power based on the received power control command, and report the power headroom information to the terminal device B.
  • the terminal device B and the terminal device A may repeat steps S301 to S308 in the subsequent time.
  • the receiving end when the receiving end generates the power control command, it may only consider the relative movement information between the receiving end and the transmitting end. For example, if the relative distance is getting farther and farther, the receiving end generates an increase power control command. ; And the relative distance gets closer and closer, the receiving end generates a power reduction control command.
  • the foregoing various embodiments may be applicable to a single-point communication mode, that is, interaction between two terminal devices, and interference from other terminal devices may not be considered when generating a power control command.
  • the foregoing various embodiments may also be applicable to a communication mode in which multiple terminal devices are distributed, that is, the interaction between one terminal device and multiple terminal devices.
  • the receiving end in addition to considering the above-mentioned link quality information, the mutual influence between other terminal equipment and the sending end can also be combined.
  • the signal sent by other terminal equipment to the receiving end interferes with the signal sent from the sending end to the receiving end, or the service priority of the signal sent by other terminal equipment to the receiving end and the signal sent from the sending end to the receiving end.
  • the receiving end may separately consider the interaction between other terminal devices and the transmitting end to generate the power control command.
  • Example 1 The receiving end is the first terminal device, the sending end is the second terminal device, and the other terminal devices are the third terminal device.
  • the signal sent by the second terminal device to the first terminal device is the first signal, and the third terminal device The signal sent by the device to the first terminal device is the third signal.
  • the first terminal device can consider that the transmission power of the second terminal device is too high, that is, send a power reduction control command to the second terminal device. Further, the first terminal device can also consider The transmission power of the third terminal device is too low, that is, the power increase control command is sent to the third terminal device; and if the third signal interferes with the first signal, the first terminal device can consider that the transmission power of the second terminal device is too low , That is, send a power increase control command to the second terminal device. Further, the first terminal device may also consider that the transmission power of the third terminal device is too high, that is, send a power reduction control command to the third terminal device.
  • Example 2 The receiving end is the first terminal device, the transmitting end is the second terminal device, and the other terminal devices are the fourth terminal device.
  • the signal sent by the second terminal device to the first terminal device is the first signal, and the fourth terminal The signal sent by the device to the first terminal device is the second signal.
  • the first terminal device may consider that the transmission power of the second terminal device needs to be increased to ensure that the signal sent by the first terminal device has high reception quality and low reception quality.
  • the bit error rate, etc., and even errors are not allowed, that is, send an increase power control command to the second terminal device.
  • the first terminal device can also consider that the signal sent by the third terminal device can allow low reception quality or delay, etc.
  • the first terminal device may consider that the transmission power of the second terminal device needs to be reduced, that is, to The second terminal device sends a power reduction control command. Further, the first terminal device may also consider that it is necessary to increase the transmission power of the third terminal device, that is, send the power increase control command to the third terminal device.
  • the first terminal device when the first terminal device generates the power control command, it may also comprehensively consider the link quality information of the signal sent by each terminal device, the interference of the signal sent by different terminal devices, and the service priority of the signal sent by different terminal devices.
  • the link quality information can be combined with the interference situation. Assuming that the first signal sent by the second terminal device causes interference to the third signal sent by the third terminal device, the first terminal device can first determine the link of the first signal Is the quality good? If it is good at this time, the first terminal device can send a power reduction control command to the second terminal device. Otherwise, the first terminal device does not send a power reduction control command to the second terminal device, but passes The first terminal device sends a power increase control command to the third terminal device to reduce the interference of the signal sent by the second terminal device on the signal sent by the third terminal device.
  • the interference situation can be combined with service priority information. Assuming that the first signal sent by the second terminal device interferes with the third signal sent by the third terminal device, the first terminal device can first determine the service to which the first signal belongs The service priority of the service to which the third signal belongs. If the service priority of the first signal is higher than that of the third signal, then the first terminal device does not send a power reduction control command to the second terminal device, but passes to the third terminal device The power increase control command is sent to reduce the interference of the signal sent by the second terminal device to the signal sent by the third terminal device; otherwise, the first terminal device directly sends the power reduction control command to the second terminal device.
  • Figure 4 shows an application scenario diagram of multi-terminal device distribution.
  • the terminal device A can be used as the receiving end, and the terminal device B, the terminal device C, and the terminal device D can all be used as the transmitting end.
  • the terminal device A can act as the central node of this communication group.
  • terminal device A can receive signals from terminal device B, terminal device C, and terminal device D at the same time. Since terminal device B, terminal device C, and terminal device D have different relative distances from terminal device A, their signals arrive The signal strength of terminal device A will be different. Therefore, for terminal device A, the signal quality of terminal device B, terminal device C, and terminal device D are different. In some cases, terminal device B that is far away The signal of may be interfered by the signals of terminal equipment C and/or terminal equipment D that are close to each other, resulting in incorrect reception. Then the following examples can be used to improve:
  • the terminal device A receives signals from other terminal devices.
  • these signals carry service priority information, for example, it may be QoS signal quality requirement information.
  • the terminal device A judges whether the quality of each signal meets the requirements. For details, see the judgment method of link quality above.
  • terminal device A finds that the quality of some signals with high service priority does not meet the requirements (for example, the service priority of the signal of terminal device B is higher than the signal of terminal device C and/or terminal device D. Further, terminal device B The signal can belong to the anti-collision service), then the terminal device A can further adjust the transmit power of each terminal device in combination with the mobility between the terminals:
  • the terminal device A can notify the terminal device C and/or the terminal device D to reduce its transmission power to reduce interference;
  • the terminal device A can also notify the terminal device B to increase its transmission power.
  • the terminal device A can repeat the above steps in the subsequent time to continuously monitor and coordinate the service requirements among multiple terminal devices.
  • FIG. 5 shows a schematic diagram of another distributed terminal device.
  • Each terminal is in a mutual communication mode, that is, the terminal device A communicates with the terminal device B and the terminal device C respectively.
  • terminal device A may only need to communicate with a few terminal devices in front or behind, that is, its transmission power only needs to ensure that the few terminal devices related to it can receive and demodulate normally. .
  • the transmission power of any terminal device is at a relatively low and sufficient level, and the final result is the power of the entire SL communication system. At a relatively low level, mutual interference is relatively low, and the overall power efficiency is optimized.
  • power control can be performed in the manner of the embodiment of this application, that is, the transmitting end sends a signal to the receiving end, and the receiving end feeds back power to the transmitting end based on the various embodiments described above. control commands.
  • one terminal device may send signals to multiple terminal devices, and the terminal device may receive power control commands fed back by multiple terminal devices. Then the terminal device can adjust the transmit power in the following two ways:
  • the terminal device sends signals to multiple terminal devices in a one-to-many mode, that is, a multicast mode, if the power control commands fed back by multiple terminal devices are consistent, for example, all feedback is an increase power control command, then the terminal The device increases the transmission power; if the power control commands fed back by multiple terminal devices are inconsistent, for example, some feedback is to increase the power control command, while others feedback is to reduce the power control command, then the terminal device needs to combine the received power control command Multiple power control commands are used to comprehensively consider whether to increase or decrease the transmission power.
  • multiple terminal devices can also feed back signal strength to the terminal device.
  • the terminal device can determine whether to increase or decrease the transmission power in combination with the signal strength fed back by each terminal device.
  • Transmission power may characterize the distance, relative mobility, etc. between each terminal device and the terminal device. For example, for the terminal devices that feed back the power control command to reduce the transmission, if the relative mobility of these terminal devices is high, the terminal device can ignore the power reduction control command and directly increase the transmission power according to the power control command increase.
  • the terminal device can adjust the transmission power according to the power control commands fed back by each terminal device.
  • terminal A in FIG. 5 we use terminal A in FIG. 5 as an example to describe an embodiment of the present application.
  • terminal A transmits an initial signal to other surrounding terminals (here, it is assumed that the surrounding terminals are B and C).
  • the transmitted signal carries its initial transmission power intensity P 0 .
  • terminals B and C After terminals B and C receive the initial signal of A, they feed back to terminal A the signal strengths P 1 and P 2 of the receiving end and their respective power control commands.
  • the power control command includes increasing or decreasing the transmission power.
  • Terminals B and C can give power control commands by considering factors such as received link quality information and relative mobility. For example, in the case of low bit error rate and low mobility, a command to lower the power can be given. On the contrary, increase, not decrease or decrease a lower power command.
  • terminal A After terminal A receives P 1 and P 2 and their respective power control commands from terminal B and terminal C, it can roughly know the current terminal distance information and relative mobility information according to P 1 and P 2 . Terminal A adjusts the transmit power to terminal B and terminal C:
  • a and B, A and C can be independent adjustment processes, or A can be combined with the power control commands of B and C for unified processing. This depends on the type of business between A and B and A and C. If A is a one-to-many broadcast service at this time, A will only take an action to increase, decrease or maintain the current power, and if A is a one-to-one service with B and C at this time, A can be alone Adjust the corresponding power, etc. Optionally, if it is a one-to-one service, the signal sent by A to B or C carries identification information of B or C, respectively, to ensure that B and C receive their own signals respectively.
  • the terminal B and the terminal C monitor the power changes between them and the terminal A, and dynamically adjust the power of the terminal A as described in steps 2 and 3.
  • the transmission power of terminal A can be maintained at a relatively low but sufficient level.
  • other terminals can also achieve the same effect.
  • the power level of the entire SL communication system can be kept at a low level to avoid mutual interference.
  • the power control commands and auxiliary power information fed back by the relevant communication terminals can ensure that the power of the transmitter terminal is appropriate, and ultimately maintain the power balance of the distributed system.
  • the interaction between the second terminal device at the sending end and the first terminal device at the receiving end and related characteristics and functions correspond to the relevant characteristics and functions of the first terminal device.
  • the relevant content has been described in detail in the above method 200, and is not repeated here for brevity.
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not be implemented in this application.
  • the implementation process of the example constitutes any limitation.
  • the power adjustment method according to the embodiment of the present application is described in detail above.
  • the power adjustment device according to the embodiment of the present application will be described below in conjunction with FIG. 6 to FIG. 8.
  • the technical features described in the method embodiment are applicable to the following device implementation example.
  • FIG. 6 shows a schematic block diagram of a terminal device 300 according to an embodiment of the present application.
  • the terminal device is a first terminal device, and the terminal device 300 includes:
  • the transceiver unit 310 is configured to receive the first signal sent by the second terminal device, and
  • a power control command is sent to the second terminal device, where the power control command is used to adjust the transmission power of the second terminal device.
  • the transceiving unit is specifically configured to: prioritize services based on the first link quality information for sending the first signal, the service to which the first signal belongs and the service to which the second signal belongs At least one of the level information and the interference between the first signal and the third signal, the power control command is sent to the second terminal device, and the second signal and the third signal are both the A signal of a terminal device other than the second terminal device received by the first terminal device.
  • the sending and receiving unit sends the power control command to the second terminal device according to the first link quality information for sending the first signal, including: If the link quality indicated by the link quality information is good enough to meet the first condition, send a power reduction control command to the second terminal device; or, if the link quality indicated by the first link quality information is poor In the case that the first condition is not met, a power increase control command is sent to the second terminal device.
  • the terminal device further includes: a processing unit, configured to obtain if the link quality indicated by the first link quality information is good enough to meet the first condition Relative movement information between the first terminal device and the second terminal device; when the link quality indicated by the first link quality information is good enough to meet the first condition, the transceiver unit Sending a power reduction control command to the second terminal device includes: sending the power reduction control command to the second terminal device when the relative movement speed indicated by the relative movement information is low enough to meet a second condition .
  • the first condition is determined by the quality of service QoS corresponding to the service to which the first signal belongs.
  • the first link quality information includes at least one of the following information: bit error rate, signal-to-noise ratio, and signal strength.
  • the transceiving unit is further configured to: receive power headroom information sent by the second terminal device, where the power headroom information is used to characterize the power headroom information adjusted according to the power control command The difference between the transmit power and the maximum transmit power.
  • the transceiving unit is further configured to: receive the third signal sent by a third terminal device; the transceiving unit is based on the interference between the first signal and the third signal, Sending the power control command to the second terminal device includes: if the third signal is interfered by the first signal, sending a power reduction control command to the second terminal device; or, if the first signal The signal is interfered by the third signal, and a power increase control command is sent to the second terminal device.
  • the transceiving unit is further configured to: if the third signal is interfered by the first signal, send a power increase control command to the third terminal device; or, if The first signal is interfered with by the third signal, and a power reduction control command is sent to the third terminal device.
  • the transceiving unit is further configured to: receive the second signal sent by the fourth terminal device; the transceiving unit is based on the business of the first signal and the business of the second signal
  • Sending the power control command to the second terminal device includes: if the service priority of the service to which the second signal belongs is higher than the service priority of the service to which the first signal belongs, sending the power control command to the The second terminal device sends a power reduction control command; or, if the service priority of the service to which the first signal belongs is higher than the service priority of the service to which the second signal belongs, send the power increase control to the second terminal device command.
  • the transceiving unit is further configured to: if the service priority of the service to which the second signal belongs is higher than the service priority of the service to which the first signal belongs, to the fourth signal
  • the terminal device sends a power increase control command; or, if the service priority of the service to which the first signal belongs is higher than the service priority of the service to which the second signal belongs, a power decrease control command is sent to the fourth terminal device.
  • the transceiving unit is further configured to feed back the signal strength of the first signal to the second terminal device.
  • terminal device 300 may correspond to the first terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 300 are to implement the method in FIG. 2 respectively.
  • the corresponding process of the first terminal device in the first terminal device will not be repeated here.
  • FIG. 7 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application.
  • the terminal device is a second terminal device, and the terminal device 400 includes:
  • the transceiver unit 410 is configured to send a first signal to the first terminal device, and
  • the terminal device further includes: a processing unit, configured to increase the transmission power if the first power control command is an increase power control command; or, if the first power control command is an increase power control command;
  • the power control command is a power control command to reduce the transmission power.
  • the transceiving unit is further configured to: after the second terminal device adjusts the transmit power according to the first power control command, transmit power to the first terminal device Margin information.
  • the first signal carries service priority information of the service to which the first signal belongs.
  • the transceiver unit is further configured to: send a second signal to a third terminal device; receive a second power control command sent by the third terminal device based on the second signal, The second power control command is used to adjust the transmit power of the second terminal device.
  • the terminal device further includes: a processing unit, configured to adjust the transmit power of the second terminal device for the first terminal device according to the first power control command , And adjusting the transmit power of the second terminal device for the third terminal device according to the second power control command.
  • the terminal device further includes: a processing unit, configured to adjust the second terminal device's focus on multiple power control commands according to the first power control command and the second power control command.
  • Transmission power of a terminal device, the plurality of terminal devices include the first terminal device and the third terminal device.
  • the transceiving unit is further configured to: the second terminal device receives the first signal strength of the first signal sent by the first terminal device and the third terminal device The second signal strength of the second signal sent by the device; the processing unit is specifically configured to: when the first power control command is inconsistent with the second power control command, the second terminal device according to the The first signal strength and the second signal strength are adjusted to transmit power of the second terminal device for the multiple terminal devices.
  • terminal device 400 may correspond to the second terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 400 are to implement the method in FIG. 2 respectively.
  • the corresponding process of the second terminal device in the second terminal device will not be repeated here.
  • FIG. 8 is a schematic structural diagram of a communication device 500 provided by an embodiment of the present application.
  • the communication device 500 shown in FIG. 8 includes a processor 510, and the processor 510 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the communication device 500 may further include a memory 520.
  • the processor 510 may call and run a computer program from the memory 520 to implement the method in the embodiment of the present application.
  • the memory 520 may be a separate device independent of the processor 510, or may be integrated in the processor 510.
  • the communication device 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices, specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 530 may include a transmitter and a receiver.
  • the transceiver 530 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 500 may specifically be a terminal device of an embodiment of the present application, and the communication device 500 may implement the corresponding procedures implemented by the terminal device in each method of the embodiments of the present application. For brevity, details are not repeated here. .
  • FIG. 9 is a schematic structural diagram of a chip of an embodiment of the present application.
  • the chip 600 shown in FIG. 9 includes a processor 610, and the processor 610 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the chip 600 may further include a memory 620.
  • the processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.
  • the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
  • the chip 600 may further include an input interface 630.
  • the processor 610 can control the input interface 630 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the chip 600 may further include an output interface 640.
  • the processor 610 can control the output interface 640 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in the various methods of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the terminal device in the various methods of the embodiment of the present application.
  • the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip, etc.
  • FIG. 10 is a schematic block diagram of a communication system 700 according to an embodiment of the present application. As shown in FIG. 10, the communication system 700 includes a first terminal device 710 and a second terminal device 720.
  • the first terminal device 710 can be used to implement the corresponding function implemented by the first terminal device in the above method
  • the second terminal device 720 can be used to implement the corresponding function implemented by the second terminal device in the above method
  • the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA ready-made programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • Synchlink DRAM SLDRAM
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, for the sake of brevity , I won’t repeat it here.
  • the embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program product can be applied to the terminal device in the embodiment of this application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of this application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of this application.
  • I will not repeat them here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the computer program can be applied to the terminal device in the embodiment of the present application.
  • the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • 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, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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

Abstract

Selon certains modes de réalisation, la présente invention concerne un procédé de réglage de puissance et un appareil terminal. Le procédé comprend les étapes suivantes : un premier appareil terminal reçoit un premier signal envoyé par un second appareil terminal ; et le premier appareil terminal envoie, selon le premier signal, une instruction de commande de puissance au second appareil terminal, l'instruction de commande de puissance étant utilisée pour régler une puissance de transmission du second appareil terminal. Selon le procédé et l'appareil terminal décrits dans les modes de réalisation de la présente invention, un réglage de puissance est réalisé au moyen d'un mécanisme de négociation de puissance entre des appareils terminaux, de telle sorte qu'un appareil terminal peut utiliser une puissance de transmission appropriée pour transmettre un signal, ce qui permet d'améliorer les performances de communication.
PCT/CN2019/099090 2019-08-02 2019-08-02 Procédé de réglage de puissance et appareil terminal WO2021022415A1 (fr)

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CN201980093552.2A CN113508623B (zh) 2019-08-02 2019-08-02 调整功率的方法和终端设备

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