WO2019154088A1 - Procédé et appareil de commande de puissance - Google Patents

Procédé et appareil de commande de puissance Download PDF

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Publication number
WO2019154088A1
WO2019154088A1 PCT/CN2019/072848 CN2019072848W WO2019154088A1 WO 2019154088 A1 WO2019154088 A1 WO 2019154088A1 CN 2019072848 W CN2019072848 W CN 2019072848W WO 2019154088 A1 WO2019154088 A1 WO 2019154088A1
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Prior art keywords
terminal device
power control
measurement result
control parameter
network device
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PCT/CN2019/072848
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English (en)
Chinese (zh)
Inventor
黎超
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华为技术有限公司
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Publication of WO2019154088A1 publication Critical patent/WO2019154088A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a method and apparatus for power control.
  • LTE Long Term Evolution
  • SL side link
  • eNB Evolved NodeB
  • the terminal device is located within the coverage of the network device, Since the terminal device is based on the side link communication and the terminal device uses the same carrier based on the cellular network communication (such as the uplink carrier of the cellular communication used by the side link communication), it is necessary to consider the interference of the side link communication to the network device.
  • the transmission of the side link communication is controlled in a manner similar to the uplink power control in the communication process of the LTE cellular network.
  • Embodiments of the present invention provide a method and apparatus for determining transmit power. It solves the problem of interference to cellular links in high-frequency-based edge link communication and the inability to fully utilize transmit power resources.
  • an embodiment of the present invention provides a method for determining transmit power.
  • the first terminal device determines a power control parameter, the power control parameter is determined based on a first beam direction, where the first beam direction is a beam direction used by the first terminal device on an edge link,
  • the edge link is a communication link between the first terminal device and the second terminal device; the first terminal device determines a transmit power of the edge link according to the power control parameter.
  • the determined power control parameters are more accurate, which can reduce the interference to the cellular link and fully utilize the power resources.
  • the first terminal device obtains a first measurement result based on the signal sent by the network device by the first beam direction, and the first terminal device determines the power control parameter, including: according to the The first measurement determines the power control parameter.
  • the first terminal device measures a signal sent by the network device based on a second beam direction to obtain a second measurement result, where the second beam direction is the first terminal device in a cell a beam direction used on the link, the cellular link being a communication link between the first terminal device and the network device; determining the power control parameter according to the first measurement result, including: The power control parameter is determined according to the first measurement result and the second measurement result. Since the different gains of the beam direction versus signal on the side link and the cellular link are considered to more specifically determine the power control parameters, the determined power control parameters are more accurate.
  • the first terminal device measures, according to the N third beam directions, a signal sent by the network device, to obtain N third measurement results, where each of the N third beam directions a beam direction used on a communication link between the first terminal device and one of the at least N other terminal devices; the determining the power control parameter according to the first measurement result, including: The terminal device determines the power control parameter according to the first measurement result and the at least one third measurement result.
  • the first terminal device determines an average of the first measurement result and the at least one third measurement result, wherein the power control parameter includes the average value, A terminal device determines the power control parameter based on the average value.
  • the first terminal device sends the first measurement result to the network device; the first terminal device determines the power control parameter, including: the first terminal device from a network The device receives the power control parameter.
  • the first terminal device sends the first measurement result and the second measurement result to the network device; the first terminal device determines the power control parameter, including: The first terminal device receives the power control parameter from the network device.
  • the first terminal device sends a fourth measurement result to the network device, where the fourth measurement result is obtained according to the first measurement result and the second measurement result; Determining, by the first terminal device, the power control parameter, that: the first terminal device receives the power control parameter from a network device. By reporting the fourth measurement result, the signaling overhead of the reporting can be reduced.
  • the fourth measurement result is a difference between the first measurement result and the second measurement result; the first terminal device determines the power control parameter, including: A terminal device receives the power control parameter from a network device.
  • the first terminal device sends the first measurement result and the N third measurement results to the network device, and the first terminal device determines the power control parameter, including The first terminal device receives the power control parameter from a network device.
  • the first terminal device sends a fifth measurement result to the network device, where the fifth measurement result is obtained according to the first measurement result and the N third measurement results.
  • the determining, by the first terminal device, the power control parameter includes: the first terminal device receiving the power control parameter from a network device. By reporting the fifth measurement result, the signaling overhead of the report can be reduced.
  • the fifth measurement result is an average of the first measurement result and the at least one third measurement result; the first terminal device determines the power control parameter, including: The first terminal device receives the power control parameter from the network device.
  • the first terminal device determines the transmit power according to a maximum transmit power and the power control parameter, wherein the transmit power is less than or equal to the maximum transmit power.
  • the first terminal device receives radio resource configuration information sent by the network device, the radio resource configuration information includes at least one radio resource, and the first terminal device according to the power control parameter Determining the transmit power on the at least one radio resource.
  • the first terminal device receives subcarrier spacing configuration information sent by the network device, where the subcarrier spacing configuration information includes at least one subcarrier spacing, and the first terminal device according to the a power control parameter determining the transmit power on the at least one first radio resource, the at least one first radio resource applying any one of the at least one subcarrier interval.
  • the embodiment of the present invention determines a method for determining a power control parameter, where the method includes: the network device obtains a first measurement result, where the first measurement result is that the network device sends the measurement based on the first beam direction. Obtained, the first beam direction is a beam direction used by the first terminal device on the edge link, and the edge link is a communication link between the first terminal device and the second terminal device. The network device determines, according to the first measurement result, a power control parameter, where the power control parameter is used by the first terminal device to determine a transmit power of the edge link.
  • the network device obtains a second measurement result, where the second measurement result is obtained by measuring a signal sent by the network device based on a second beam direction, where the second beam direction is a beam direction used by the first terminal device on a cellular link, the cellular link being a communication link between the first terminal device and the network device; the network device according to the first measurement The result and the second measurement determine the power control parameter.
  • the network device obtains N third measurement results, where the N third measurement results are obtained by the first terminal device measuring the signal sent by the network device based on the N third beam directions, Wherein each of the N third beam sides is a beam direction used on a communication link between the first terminal device and one of at least N other terminal devices; the network device is according to the first The measurement result and the at least one third measurement result determine the power control parameter.
  • the network device determines a difference between the first measurement result and the second measurement, wherein the power control parameter includes the difference value; the network device according to the difference The value determines the power control parameter.
  • the network device determines an average of the first measurement result and the N third measurement results, wherein the power control parameter includes the average value;
  • the average determines the power control parameters.
  • the network device sends radio resource configuration information to the first terminal device, where the radio resource configuration information includes at least one radio resource, and the at least one radio resource is used by the first terminal.
  • the device determines the transmit power on the at least one radio resource based on the power control parameter.
  • the network device sends subcarrier spacing configuration information to the first terminal device, where the subcarrier spacing configuration information includes at least one subcarrier spacing, and the at least one subcarrier spacing is used for Determining, by the first terminal device, the transmit power on the at least one first radio resource according to the power control parameter, where the at least one first radio resource applies any one of the at least one subcarrier interval .
  • the network device sends the power control parameter to the first terminal device to the first terminal device.
  • the present invention provides a method for determining a power control parameter, the method comprising: obtaining, by a network device, a fourth measurement result, where the fourth measurement result is a difference between the first measurement result and the second measurement result
  • the first measurement result is obtained by measuring a signal sent by the network device based on a first beam direction, where the first beam direction is a beam direction used by the first terminal device on an edge link,
  • the edge link is a communication link between the first terminal device and the second terminal device
  • the second beam direction is a beam direction used by the first terminal device on a cellular link, the cellular link a communication link between the first terminal device and the network device
  • the network device determines a power control parameter according to the fourth measurement result, where the power control parameter is used by the first terminal device to determine Transmit power of the edge link
  • the network device sends the power control parameter to the first terminal device.
  • This method can further reduce signaling overhead.
  • the present invention provides a method for determining power control, the method comprising: obtaining, by a network device, a fifth measurement result, where the fifth measurement result is an average of the first measurement result and the at least one third measurement result a value, where the first measurement result is obtained by measuring a signal sent by the network device based on a first beam direction, where the first beam direction is a beam direction used by the first terminal device on an edge link, where The edge link is a communication link between the first terminal device and the second terminal device, and the at least one third beam direction is a communication link between the first terminal device and at least one other terminal device a beam direction used on the network device, wherein the network device determines, according to the fifth measurement result, a power control parameter, where the power control parameter is used by the first terminal device to determine a transmit power of the edge link; Transmitting the power control parameter to the first terminal device.
  • This method can further reduce signaling overhead.
  • an embodiment of the present invention provides a wireless device, including a processor and a memory coupled to the processor, where the processor is configured to determine a power control parameter, where the power control parameter is based on the first The beam direction is determined, the first beam direction is a beam direction used by the first terminal device on the edge link, and the edge link is a communication link between the first terminal device and the second terminal device The processor is further configured to determine a transmit power of the edge link according to the power control parameter.
  • the processor is configured to: according to the first beam direction measurement signal sent by the network device, obtain a first measurement result; the processor is further configured to determine, according to the first measurement result The power control parameter.
  • the processor is configured to measure a signal sent by the network device based on a second beam direction, to obtain a second measurement result, where the second beam direction is that the first terminal device is a beam direction used on a cellular link, the cellular link being a communication link between the first terminal device and the network device;
  • the processor is configured to determine the power control parameter according to the first measurement result and the second measurement result.
  • the processor is configured to measure, according to the N third beam directions, a signal sent by the network device, to obtain N third measurement results, where the N third beam directions are Each is a beam direction used on a communication link between the first terminal device and at least one of the N other terminal devices; the processor is further configured to: according to the first measurement result and the at least one The third measurement determines the power control parameter.
  • the processor is configured to determine a difference between the first measurement result and the second measurement, where the power control parameter includes the difference value; And for, according to the difference, the power control parameter.
  • the processor is configured to determine an average of the first measurement result and the N third measurement results, wherein the power control parameter includes the average value;
  • the device is further configured to control the power parameter according to the average value.
  • the processor is configured to determine the transmit power according to a maximum transmit power and the power control parameter, wherein the transmit power is less than or equal to the maximum transmit power.
  • the method further includes: a transceiver, wherein the transceiver is configured to send the first measurement result to the network device; the transceiver is further configured to receive the power control from a network device parameter.
  • the transceiver is configured to send the first measurement result and the second measurement result to the network device; the transceiver is further configured to receive the power control from a network device parameter.
  • the transceiver is configured to send a fourth measurement result to the network device, where the fourth measurement result is obtained according to the first measurement result and the second measurement result;
  • the transceiver is further configured to receive the power control parameter from a network device.
  • the fourth measurement result is a difference between the first measurement result and the second measurement result.
  • the transceiver is configured to send the N third measurement results to the network device; the transceiver is further configured to receive the power control parameter from a network device.
  • the transceiver is configured to send a fifth measurement result to the network device, where the fifth measurement result is obtained according to the first measurement result and the at least one third measurement result
  • the transceiver is further configured to receive the power control parameter from a network device.
  • the fifth measurement result is an average of the first measurement result and the at least one third measurement result.
  • a sixth aspect provides a wireless device, including a processor and a memory coupled to the processor, wherein the processor is configured to obtain a first measurement result, wherein the first measurement result is a first terminal device Obtaining, according to the signal sent by the network device, the first beam direction is a beam direction used by the first terminal device on the edge link, where the edge link is the first terminal device and a communication link between the second terminal devices; the processor, configured to determine, according to the first measurement result, a power control parameter, where the power control parameter is used by the first terminal device to determine the edge chain The transmission power of the road.
  • the transceiver is configured to obtain a second measurement result, where the second measurement result is obtained by the first terminal device measuring a signal sent by the network device based on the second beam direction, where The second beam direction is a beam direction used by the first terminal device on a cellular link, and the cellular link is a communication link between the first terminal device and the network device; the processor And determining to determine the power control parameter according to the first measurement result and the second measurement result.
  • the processor is configured to obtain N third measurement results, where the N third measurement results are that the first terminal device measures the network device based on N third beam directions Obtained by the transmitted signal, wherein each of the N third beam directions is a beam direction used on a communication link between the first terminal device and one of the at least N other terminal devices;
  • the processor is further configured to determine the power control parameter according to the first measurement result and the N third measurement results.
  • the processor is configured to determine a difference between the first measurement result and the second measurement, where the power control parameter includes the difference value; And determining, according to the difference, the power control parameter.
  • the processor is configured to determine an average of the first measurement result and the at least one third measurement result, wherein the power control parameter includes the average value;
  • the processor is further configured to determine the power control parameter based on the average value.
  • the receiver further includes: the transceiver, configured to send, to the first terminal device, radio resource configuration information, where the radio resource configuration information includes at least one radio resource, the at least one The radio resource is used by the first terminal device, the first terminal device, to determine the transmit power on the at least one radio resource according to the power control parameter.
  • the transceiver configured to send, to the first terminal device, radio resource configuration information, where the radio resource configuration information includes at least one radio resource, the at least one The radio resource is used by the first terminal device, the first terminal device, to determine the transmit power on the at least one radio resource according to the power control parameter.
  • the transceiver is configured to send subcarrier spacing configuration information to the first terminal device, where the subcarrier spacing configuration information includes at least one subcarrier spacing, and the at least one subcarrier spacing is used by Determining, according to the power control parameter, the transmit power on the at least one first radio resource, where the at least one first radio resource applies any one of the at least one subcarrier interval Carrier spacing.
  • the present invention provides a wireless device, including: a processor and a memory coupled to the processor, wherein the processor is configured to obtain a fourth measurement result, where the fourth measurement result is a first measurement a difference between the result and the second measurement result, wherein the first measurement result is obtained by measuring a signal sent by the network device based on a first beam direction, where the first beam direction is a beam direction used on the side link, the side link is a communication link between the first terminal device and the second terminal device, and the second beam direction is the first terminal device in a cellular link a beam direction used, the cellular link is a communication link between the first terminal device and the network device; the processor is further configured to determine a power control parameter according to the fourth measurement result, where The power control parameter is used by the first terminal device to determine a transmit power of the edge link
  • the present invention provides a wireless device, including a processor and a memory coupled to the processor; the processor is configured to obtain a fifth measurement result, where the fifth measurement result is a first measurement result And an average of the N third measurement results, where the first measurement result is obtained by measuring a signal sent by the network device based on a first beam direction, where the first beam direction is the first terminal device a beam direction used on the edge link, the edge link is a communication link between the first terminal device and the second terminal device, and each of the N third beam directions is the a beam direction used on a communication link between a terminal device and one of at least N other terminal devices; the processor configured to determine a power control parameter according to the fifth measurement result, the power control parameter The first terminal device is configured to determine an edge link transmit power.
  • a transceiver is further included, wherein the transceiver is configured to transmit the power control parameter to the first terminal device. Signaling overhead can be reduced.
  • the transceiver is configured to receive the first measurement result from the first terminal device.
  • the transceiver is configured to receive the first measurement result and the second measurement result from the first terminal device.
  • the transceiver for receiving the first measurement result from the first terminal device and The N third measurement results.
  • the transceiver is configured to receive the fourth measurement result from the first terminal device.
  • the transceiver is configured to receive the fifth measurement result from the first terminal device.
  • the signal sent by the network device includes at least one of the following: a cell reference signal (CRS); a channel state indication reference signal (CSI-RS); a synchronization signal (SS); a synchronization signal block (SSB) Demodulation Reference Signal (DMRS).
  • CRS cell reference signal
  • CSI-RS channel state indication reference signal
  • SS synchronization signal
  • SSB synchronization signal block
  • DMRS Demodulation Reference Signal
  • the first measurement result is any one of the following: reference signal received power (RSRP); reference signal received quality (RSRQ); signal to interference and noise ratio (SINR); Reference Signal Strength Indication (RSSI); Second Path Loss (PathLoss).
  • the first measurement result and the second measurement result are any one of: reference signal received power (RSRP); reference signal received quality ( RSRQ); Signal Interference and Noise Ratio (SINR); Reference Signal Strength Indication (RSSI); Second Path Loss (PathLoss).
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • SINR Signal Interference and Noise Ratio
  • RSSI Reference Signal Strength Indication
  • PathLoss Second Path Loss
  • the first measurement result and the at least one third measurement result are any one of: reference signal received power (RSRP); reference signal Receive Quality (RSRQ); Signal to Interference and Noise Ratio (SINR); Reference Signal Strength Indication (RSSI); Second Path Loss (PathLoss).
  • RSRP reference signal received power
  • RSSQ reference signal Receive Quality
  • SINR Signal to Interference and Noise Ratio
  • RSSI Reference Signal Strength Indication
  • PathLoss Second Path Loss
  • the first beam direction is predefined, or configured by the network device, or determined by the first terminal device;
  • the second beam direction is predefined by a protocol, or configured or pre-configured by the network device, or determined by the first terminal device;
  • the at least one third beam direction is predefined by a protocol, or configured or pre-configured by the network device, or determined by the first terminal device .
  • a computer storage medium for storing computer software instructions for use by the first terminal device, including program instructions for performing the above aspects.
  • a computer storage medium for storing computer software instructions for use in the network device described above, comprising program instructions for performing the above aspects.
  • a communication device comprising: a processor and a memory coupled to the processor, the processor for storing instructions for reading and executing in a memory
  • the communication device is controlled to perform the methods of the various embodiments of the present invention.
  • FIG. 1 is a schematic diagram of a wireless communication system applied to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing the possible structure of a network device in the above wireless communication system.
  • FIG. 3 is a schematic diagram showing the possible structure of the terminal device in the above wireless communication system.
  • FIG. 4 is a schematic flow chart showing a method of determining transmit power.
  • the present invention is applicable to wireless communication systems.
  • Long Term Evolution (LTE) device to device (D2D) communication enhanced D2D communication
  • vehicle to everything communication including vehicle to vehicle (V2V), Communication to Pedestrian (V2P), Vehicle to Infrastructure (V2I), communication system based on side link communication in 5G communication system, etc.
  • LTE Long Term Evolution
  • D2D device to device
  • V2V vehicle to everything communication
  • V2V vehicle to vehicle
  • V2P Communication to Pedestrian
  • V2I Vehicle to Infrastructure
  • the embodiment of the present invention is exemplified by the V2V communication in the 5G communication system, and does not constitute a limitation of the technical solution provided by the embodiment of the present invention.
  • Those skilled in the art may know that with the emergence of a new service scenario and the evolution of the network architecture, The technical solutions provided by the embodiments of the invention are equally applicable to similar technical problems.
  • FIG. 1 is a schematic diagram of a wireless communication system applied to an embodiment of the present invention.
  • FIG. 1 shows an application scenario of an embodiment of the present invention, which includes a network device 101 and a network device 102.
  • network device 101 includes a network device 101 and a network device 102.
  • terminal devices 111 to 114 for simplicity, only four terminal devices are shown in the figure, but it does not mean that only four terminal devices
  • terminal devices 111-114 may be located within the coverage of the network device 101 or may be outside the coverage of the network device 101.
  • the network device 101 communicates with one or more of the terminal devices 111-114 over the air interface (as in LTE and 5G systems, the air interface is a Uu interface).
  • the terminal devices 113, 114 send signaling and or data to the network device using the uplink physical resources.
  • the terminal devices 111 to 114 can also communicate via the side link.
  • the terminal device 111 and the terminal device 112 communicate via the side link 121.
  • the network device 101 communicates with the network device 102 through a transmission interface 141.
  • the interface 141 is an X2 interface.
  • a network device is a device deployed in a radio access network to provide wireless communication functions for the terminal device.
  • the network device may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like.
  • the network device may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB, NB) in WCDMA, or may be an evolved Node B (eNB or e in LTE or eLTE).
  • BTS Base Transceiver Station
  • NodeB NodeB
  • NB evolved Node B
  • eNB evolved Node B
  • -NodeB which may also be a next generation mobile network, such as a base station gNB ((next) generation NodeB) in 5G (fifth generation).
  • gNB next generation NodeB
  • 5G next generation
  • the terminal device may also be referred to as a user equipment (User Equipment, UE), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), etc., and the terminal device may be wireless.
  • the access network (Radio Access Network, RAN) communicates with one or more core networks.
  • the terminal device is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or on-board; Can be deployed on the water (such as ships); it can also be deployed in the air (such as airplanes, balloons, satellites, etc.).
  • the terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and industrial control ( Wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, transportation safety A wireless terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.
  • a terminal device or a UE For convenience of description, in the present application, it is simply referred to as a terminal device or a UE.
  • FIG. 2 is a schematic diagram showing the possible structure of a network device in the above wireless communication system.
  • the network device may be any one of the network devices 101-102 in FIG.
  • the network device can be capable of performing the method provided by the embodiments of the present invention.
  • the network device may include a controller or a processor 201 (hereinafter, the processor 201 is taken as an example) and a transceiver 202.
  • Controller/processor 201 is sometimes also referred to as a modem processor.
  • Modem processor 201 can include a baseband processor (BBP) (not shown) that processes the digitized received signal to extract information or data bits conveyed in the signal.
  • BBP baseband processor
  • DSPs digital signal processors
  • ICs integrated circuits
  • the transceiver 202 can be used to support sending and receiving information between the network device and the terminal device, and to support radio communication between the terminal devices.
  • the processor 201 can also be used to perform functions of communication between various terminal devices and other network devices.
  • the uplink signal from the terminal device is received via the antenna, coordinated by the transceiver 202, and further processed by the processor 201 to recover the traffic data and/or signaling information transmitted by the terminal device.
  • the traffic data and/or signaling messages are processed by the terminal device and modulated by the transceiver 202 to generate a downlink signal and transmitted to the UE via the antenna.
  • the network device can also include a memory 203 that can be used to store program code and/or data for the network device.
  • the transceiver 202 can include separate receiver and transmitter circuits, or the same circuit can implement transceiving functions.
  • the network device can also include a communication unit 204 for supporting the network device to communicate with other network entities. For example, it is used to support the network device 101 to communicate with a network device or the like of the core network.
  • network device 101 may also include a bus.
  • the transceiver 202, the memory 203, and the communication unit 204 can be connected to the processor 201 through a bus.
  • the bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus may include an address bus, a data bus, a control bus, and the like.
  • FIG. 3 is a schematic diagram of a possible structure of a terminal device in the above wireless communication system.
  • the terminal device is capable of performing the method provided by the embodiments of the present invention.
  • the terminal device may be any one of the four terminal devices 111 to 114.
  • the terminal device includes a transceiver 301, an application processor 302, a memory 303, and a modem processor 304.
  • the transceiver 301 can condition (e.g., analog convert, filter, amplify, upconvert, etc.) the output samples and generate an uplink signal that is transmitted via an antenna to the base station described in the above embodiments. On the downlink, the antenna receives the downlink signal transmitted by the access network device. Transceiver 301 can condition (eg, filter, amplify, downconvert, digitize, etc.) the signals received from the antenna and provide input samples.
  • Modem processor 304 also sometimes referred to as a controller or processor, may include a baseband processor (BBP) (not shown) that processes the digitized received signal to extract information conveyed in the signal Or data bits.
  • BBP baseband processor
  • the BBP is typically implemented in one or more numbers within the modem processor 304 or as a separate integrated circuit (IC), as needed or desired.
  • a modem processor 304 may include an encoder 3041, a modulator 3042, a decoder 3043, and a demodulator 3044.
  • the encoder 3041 is for encoding the signal to be transmitted.
  • encoder 3041 can be used to receive traffic data and/or signaling messages to be transmitted on the uplink and to process (eg, format, encode, or interleave, etc.) the traffic data and signaling messages.
  • Modulator 3042 is used to modulate the output signal of encoder 3041.
  • the modulator can perform symbol mapping and/or modulation processing on the encoder's output signals (data and/or signaling) and provide output samples.
  • a demodulator 3044 is used to demodulate the input signal.
  • demodulator 3044 processes the input samples and provides symbol estimates.
  • the decoder 3043 is configured to decode the demodulated input signal.
  • the decoder 3043 deinterleaves, and/or decodes the demodulated input signal and outputs the decoded signal (data and/or signaling).
  • Encoder 3041, modulator 3042, demodulator 3044, and decoder 3043 may be implemented by a composite modem processor 304. These units are processed according to the radio access technology employed by the radio access network.
  • Modem processor 304 receives digitized data representative of voice, data or control information from application processor 302 and processes the digitized data for transmission.
  • the associated modem processor can support one or more of a variety of wireless communication protocols of various communication systems, such as LTE, new air interface, Universal Mobile Telecommunications System (UMTS), high speed packet access (High Speed) Packet Access, HSPA) and more.
  • UMTS Universal Mobile Telecommunications System
  • High Speed Packet Access High Speed Packet Access
  • one or more memories may also be included in the modem processor 304.
  • modem processor 304 and the application processor 302 may be integrated in one processor chip.
  • the memory 303 is used to store program code (sometimes referred to as programs, instructions, software, etc.) and/or data for supporting communication of the terminal device.
  • program code sometimes referred to as programs, instructions, software, etc.
  • the memory 203 or the memory 303 may include one or more storage units, for example, may be a processor 201 for storing program code or a storage unit inside the modem processor 304 or the application processor 302, or may Is an external storage unit separate from the processor 201 or the modem processor 304 or the application processor 302, or may also be a storage unit including the processor 201 or the modem processor 304 or the application processor 302 and with the processor 201 or modem
  • the processor 304 or the application processor 302 is a separate component of an external storage unit.
  • the processor 201 and the modem processor 301 may be the same type of processor or different types of processors. For example, it can be implemented in a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), and a field programmable gate array ( Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, other integrated circuit, or any combination thereof.
  • the processor 201 and the modem processor 301 can implement or perform various exemplary logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing function devices, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, or a system-on-a-chip (SOC) or the like.
  • uplink power control is adopted. Specifically, for the Physical Uplink Shared Channel (PUSCH), the terminal device calculates the transmit power on the serving cell c based on the following formula (1):
  • P CMAX,c (i) represents the maximum transmit power on the serving cell c for the subframe i configured for the terminal device.
  • M PUSCH,c (i) represents the bandwidth (the number of resource blocks) of the PUSCH resources allocated by the terminal device in the subframe i and the serving cell c.
  • ⁇ c (j) represents the amount of compensation for the path loss configured for the terminal device.
  • PL c is the downlink path loss of the serving cell c estimated by the terminal device.
  • ⁇ TF,c (i) represents the power adjustment value of the terminal device based on the modulation and coding scheme (MCS) in the subframe i and the serving cell c.
  • f c (i) represents an adjustment value of the terminal device based on the transmission power control (TPC) command in the subframe i and the serving cell c.
  • [dBm] represents the unit of transmit power.
  • the terminal device calculates the transmit power based on the following formula (2):
  • P PSSCH min ⁇ P CMAX,PSSCH ,10log 10 (M PSSCH )+P O_PSSCH,1 + ⁇ PSSCH,1 ⁇ PL ⁇ [dBm] (2)
  • PSSCH represents the maximum transmit power of the terminal device on the PSSCH.
  • M PSSCH indicates the bandwidth of the PSSCH (the number of resource blocks).
  • PL PL c, which is the PL c Equation (1)
  • P O_PSSCH, 1 represents the power reference value, or the initial transmission power;
  • ⁇ PSSCH, 1 represents the compensation amount of the path loss.
  • the above power control method is applied to low frequency band scenarios (eg, 2 GHz or 3 GHz and below). Because in the low-end scenario, the terminal device transmits the signal omnidirectionally, that is, the transmission power of the terminal device is the same in the side link communication direction and the cellular link communication direction.
  • high-frequency edge-to-link communication is also an important scenario and may even be a major scenario. For example, in future 5G communication systems, it is possible to study high-frequency edge links. Communication technology. Due to the channel model based on high frequency communication, the antenna transmission and reception modes of the terminal devices of the network device are different. Therefore, the existing power control method cannot adapt to the high frequency based side link communication, and thus cannot effectively reduce the interference to the cellular link.
  • an embodiment of the present invention provides a method for power control.
  • the terminal device measures signals transmitted by the network device based on different beam directions, thereby obtaining different measurement results. Based on these measurements, the terminal device determines the transmit power on its own side link. For example, based on these measurements, an adjustment amount is added based on the above formula (2).
  • the path loss in the above formula (2) can be obtained from a plurality of measurement results.
  • the power control problem of the high-frequency side link communication can be effectively solved by the method provided by the embodiment of the present invention, and the uplink interference is effectively reduced.
  • FIG. 4 is a schematic flow chart showing a method of determining transmit power. The embodiment shown in Figure 4 includes the following steps.
  • the network device sends beam configuration information to the first terminal device, where the first terminal device receives beam configuration information sent by the network device.
  • beamforming may be adopted to improve the quality of the communication link.
  • the beam configuration information includes first beam direction configuration information, where the first beam direction is a beam direction used by the first terminal device on the edge link, and the edge link is the first terminal device and the second Communication link between terminal devices.
  • the configuration information includes identifier information for identifying a first beam direction, or identifier information for identifying a reference signal of the first beam direction.
  • the first beam direction may be a beam direction used by the first terminal device to transmit signals on the side link or a beam direction used to receive signals on the side link.
  • the beam configuration information further includes second beam direction configuration information, where a direction of the second beam is different from a direction of the first beam.
  • the second beam direction is a beam direction used when the first terminal device communicates with the network device, that is, the second beam direction is a cellular link communication direction.
  • the configuration information includes identifier information for identifying a second beam direction, or identifier information for identifying a reference signal of the second beam direction.
  • the second beam direction may be a beam direction used by the first terminal device to transmit signals on the cellular link or a beam direction used to receive signals on the cellular link.
  • the beam configuration information further includes N third beam direction configuration information, wherein any one of the N third beam directions is different from the first beam direction.
  • one of the third beam directions is a beam direction used on a communication link between the third terminal devices of the first terminal device, the third terminal device is a terminal device different from the second terminal device, or the third terminal device is A virtual terminal device is only used to describe the third beam direction.
  • the other third beam direction is a beam direction used on a communication link between the fourth terminal device of the first terminal device, the fourth terminal device is a terminal device different from the second terminal device, or the fourth terminal device is a A virtual terminal device is only used to describe the third beam direction.
  • the beam direction used on the communication link between the first terminal device and the fourth terminal device may be the same as the beam direction used on the communication link between the first terminal device and the third terminal device, or may be different.
  • the invention is not limited.
  • Other third beam directions are similar and will not be described here.
  • the configuration information includes identifier information for identifying the N third beam directions, or identifier information for identifying reference signals of the N third beam directions.
  • beam configuration information (or configuration information called a beam direction set) includes information of a first beam direction.
  • the beam configuration information further includes measurement quantity configuration information.
  • the measurement quantity may be at least one of the following:
  • RSRP Reference Signal Receiving Power
  • SINR Signal interference noise ratio
  • RSSI Reference Signal Strength Indicator
  • the network device further sends the radio resource configuration information to the terminal device, to instruct the first terminal device to determine, according to the power control parameter, the transmit power on the resource included in the radio resource configuration information, and the corresponding terminal.
  • the device receives the radio resource configuration information sent by the network device.
  • the radio resource configuration information includes the resource pool 1 (or the frequency band 1), and the method of the embodiment of the present invention is applied; the radio resource configuration information does not include the resource pool 2 (or the frequency band 2), and the direction of the prior art is applied;
  • the information includes the resource pool 3 (or the frequency band 3), and the method of the embodiment of the present invention is applied, but the configuration information different from the resource pool 1 is used (for example, corresponding to the resource pool 1, the first beam direction in the beam configuration information is sent by the side link.
  • the beam direction, and corresponding to the resource pool 3, the first beam direction in the beam configuration information is the side link receiving beam direction; or the measurement quantity is different, or the number of included beam directions is different, and so on, the invention is not limited).
  • the network device sends subcarrier spacing configuration information to the terminal device, where the subcarrier spacing configuration information includes at least one subcarrier spacing, to indicate that the first terminal device determines, according to the power control parameter, the location on the first radio resource. Transmitting the power, wherein the first radio resource is a radio resource that uses any one of at least one subcarrier interval included in the subcarrier spacing configuration information, and the corresponding terminal device receives the radio resource sent by the network device.
  • Configuration information Specifically, in a high-frequency-based edge link communication process, different resources may use different subcarrier spacings, for example, below 3 GHz, using a 15 kHz subcarrier spacing, and between 3 GHz and 6 GHz, using a 30 kHz subcarrier spacing.
  • Different power control methods can be applied for different subcarrier spacing.
  • the method of the embodiment of the present invention is applied to the resource of the 15 kHz subcarrier; the method of the embodiment of the present invention is applied to the resource of the 30 kHz subcarrier, but the configuration information different from the resource using the 15 kHz subcarrier is used (eg, the 15 kHz subcarrier is used correspondingly)
  • the first beam direction in the beam configuration information is the edge link transmission beam direction, and the 30KHz subcarrier resource is used, and the first beam direction in the beam configuration information is the side link receiving beam direction; or the measurement amount is different, or includes The number of beam directions is different, etc.).
  • the beam configuration information may be sent by using Radio Resource Control (RRC) signaling, and may be sent by using dedicated RRC signaling or a broadcast message, which is not limited in the present invention.
  • RRC Radio Resource Control
  • the beam configuration information may also be sent through media access control (MAC) signaling, or physical layer signaling, or the beam configuration information may be sent in a combination of the foregoing manners, that is, RRC at this time.
  • the signaling sends a part of the configuration information, and/or the MAC signaling sends a part of the configuration information, and/or the physical layer signaling sends a part of the configuration information, which is not limited in the present invention.
  • the operations sent in this step may be implemented by the transceiver 202 of any one of the network devices 101-102, or may be implemented by the controller/processor 201 of the network device 101 and the transceiver 202. .
  • the receiving action operation of this step may be implemented by the transceiver 301 of any one of the terminal devices 111-114, or may be modulated or demodulated by any one of the terminal devices 111-114.
  • the processor 304 and the transceiver 301 are implemented together.
  • part or all of the beam configuration information of this step may be fixed in the protocol or determined by the first terminal device. If all of the beam configuration information is fixed in the protocol or determined by the first terminal device, the network device does not need to be sent to the first terminal device, and the first terminal device does not need to receive beam configuration information, such as the first beam direction, from the network device. Fixed in the protocol, or the second beam direction is fixed in the protocol. In this case, the step is replaced by S400, and the terminal device obtains beam configuration information, and the content included in the beam configuration information is the same as above, and details are not described herein. Correspondingly, the action obtained in this step is implemented by the modem processor 304 of any one of the terminal devices 111-114.
  • the first terminal device performs measurement according to beam configuration information, and obtains a measurement result.
  • the signal sent by the network may include at least one of the following:
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Indictor Reference Signal
  • DMRS Demodulation Reference Signal
  • the first terminal device obtains the first measurement result based on the signal sent by the first beam direction measurement network included in the beam configuration information.
  • the first measurement result obtained by the terminal device is also different according to the measurement amount configured in the beam configuration information in S400. such as:
  • the first measurement result is RSRP (eg, -70 dBm);
  • the first measurement result is RSRQ (eg, 20 dB);
  • the first measurement result is RSSI (eg, -50 dBm);
  • the first measurement result is a path loss value (such as 40 dB), which is referred to herein as a second path loss.
  • the first terminal device measures the signal sent by the network device based on the second beam direction included in the beam configuration information, to obtain a second measurement result.
  • the second measurement result obtained by the terminal device is also different according to the measurement amount configured in the beam configuration information in S400. such as:
  • the second measurement result is RSRP such as -70 dBm
  • the second measurement result is RSRQ (eg, 20 dB);
  • the second measurement result is RSSI (eg, -50 dBm);
  • the second measurement is a path loss value (eg, 40 dB), referred to herein as the second path loss.
  • the first measurement result and the second measurement result are measurement results for the same measurement, for example, both are measurement results for RSRP, or both are measurement results for RSRQ.
  • the first terminal device determines a difference between the first measurement result and the second measurement result, for example, by looking up a table, or calculating a manner, and the invention is not limited.
  • the first measurement result is Rsrp 1 of the signal transmitted by the network device based on the direction of the side link communication reception
  • the second measurement result is that the first terminal device measures the Rsrp 2 of the signal transmitted by the network device based on the reception direction of the cellular link communication.
  • the difference D Rsrp 1 - Rsrp 2 can be calculated.
  • the first terminal device obtains N third measurement results based on the signals sent by the N third beam direction measurement network devices included in the beam configuration information.
  • the first terminal device calculates an average value of the N third measurement results. For example, if the measurement result is path loss, the first terminal device sums the path loss measured based on each beam direction, and then divides the beam direction number N to obtain the equivalent path loss: Where subscript (i, 3) is used to indicate the path loss of a third beam direction, and 3 of the subscripts (i, 3) is used to indicate the path loss measured based on the third beam direction, which is referred to herein as A path loss.
  • the first terminal device determines an arithmetic mean value of the first measurement result and the N third measurement results, Where subscript (i, 3) is used to indicate the path loss of a third beam direction, and 3 of the subscripts (i, 3) is used to indicate the path loss measured based on the third beam direction, subscript (0, 1) Used to indicate path loss based on the first beam direction measurement, referred to herein as the first path loss.
  • different beam directions may have different weights when calculating the equivalent path loss (or first path loss).
  • the invention is not limited.
  • the operation of this step may be implemented by the transceiver 301 of any one of the terminal devices 111-114, or may be the modem processor 304 of any one of the terminal devices 111-114. It is implemented together with the transceiver 301.
  • the first terminal device sends the measurement result to the network device, and the network device receives the measurement result sent by the first terminal device.
  • the measurement result may include the first measurement result.
  • the measurement result may include the first measurement result.
  • the measurement result may include a second measurement result.
  • the measurement result may include the second measurement result.
  • the measurement result may include the first measurement result and the second measurement result.
  • the measurement result may include a fourth measurement result, where the fourth measurement result is a difference between the first measurement result and the second measurement result.
  • the measurement result may include a measurement result measured based on each of the first beam direction and the N third beam directions.
  • the measurement result may include a fifth measurement result, and the fifth measurement result is an average value of the measurement results measured based on each of the first beam direction and the N third beam directions.
  • the terminal device sends the message through dedicated RRC signaling, system broadcast message, MAC layer signaling, or physical layer signaling, which is not limited in the present invention.
  • the operation sent in this step may be implemented by the transceiver 301 of any one of the terminal devices 111-114, or may be a modem processor of any one of the terminal devices 111-114.
  • 304 is implemented with transceiver 301.
  • the operations received in this step may be implemented by the transceiver 202 of any one of the network devices 101-102, or may be implemented by the controller/processor 201 of the network device 101 and the transceiver 202. .
  • This step is optional.
  • the network device determines a power control parameter according to the received measurement result.
  • the power control parameter includes a power adjustment value X.
  • the power adjustment value is generated by the network device according to the first measurement result reported by the first terminal device, or generated according to the first measurement result and the second measurement result, or according to the first measurement result reported by the first terminal device and/or N
  • a third measurement result generates a power control parameter.
  • the power control parameter includes an equivalent path loss (or a first path loss), where the equivalent path loss (or the first path loss) is the N third measurement results reported by the network device according to the first terminal device, and when The measurement result is determined when the path loss is determined, and the method for determining the equivalent path loss is Where subscript (i, 3) is used to indicate the path loss of a third beam direction, and 3 of the subscripts (i, 3) is used to indicate the path loss measured based on the third beam direction.
  • the equivalent path loss (or the first path loss) is determined by the network device according to the first measurement result reported by the first terminal device and the N third measurement results, and is determined when the measurement result is path loss, wherein the determination is performed, etc.
  • the path loss method is Where subscript (i, 3) is used to indicate the path loss of a third beam direction, and 3 of the subscripts (i, 3) is used to indicate the path loss measured based on the third beam direction, subscript (0, 1) Used to indicate path loss based on the first beam direction measurement.
  • the network device may also consider other factors such as cell load and interference.
  • This step is optional.
  • controller/processor 201 and transceiver 202 of any one of network devices 101-102.
  • the network device sends a power control parameter to the first terminal device, where the first terminal device receives the power control parameter sent by the network device.
  • the network device sends the information through RRC signaling, MAC layer signaling, or physical layer signaling, which is not limited in the present invention.
  • the operations sent in this step may be implemented by the transceiver 202 of any one of the network devices 101-102, or may be implemented by the controller/processor 201 of the network device 101 and the transceiver 202. .
  • the operation received in this step may be implemented by the transceiver 301 of any one of the terminal devices 111-114, or may be a modem processor of any one of the terminal devices 111-114.
  • 304 is implemented with transceiver 301.
  • This step is optional.
  • the first terminal device determines an edge link transmit power.
  • the first terminal device determines the edge link transmit power according to the power control parameter.
  • the power control parameters include a power adjustment value X, and/or the power control parameters include an equivalent path loss (or first path loss).
  • the side link transmission power is calculated, as shown in the following formula (3):
  • P CMAX is the maximum transmit power
  • M is the edge link bandwidth
  • P O is the transmit power reference value or initial transmit power
  • ⁇ is the path loss compensation factor
  • PL is the path loss.
  • the edge link transmission power of the first terminal device cannot exceed the maximum transmission power, that is, the transmission power of the side link is less than or equal to the maximum transmission power.
  • the formula (3) can be specifically:
  • P PSSCH min ⁇ P CMAX,PSSCH ,10log 10 (M PSSCH )+P O_PSSCH,1 + ⁇ PSSCH,1 ⁇ PL+X ⁇
  • the first terminal device determines the edge link transmission power according to the first measurement result. For example, the first terminal device aligns its own receive beam direction with the direction of the side link, and then measures the signal quality of the downlink signal from the cellular link in this direction. The first terminal device can calculate the maximum transmit power of the first terminal device on the side link according to the first measurement result and the downlink transmit power difference on the cellular link.
  • P CMAX is the maximum transmit power
  • M is the edge link bandwidth
  • P O is the transmit power reference value or initial transmit power
  • ⁇ is the path loss compensation factor
  • PL eq is the equivalent path loss received from the network device
  • the first terminal device determines the edge link transmission power according to the first measurement result and the second measurement result. For example, the first terminal device determines a difference between the first measurement result and the second measurement result, where the power control parameter includes the difference value, and adds the difference value as the power adjustment value X to the formula (2), specifically
  • the form is the same as formula (3) and will not be described here.
  • the results and meanings of the differences are also different for different measurements. For example, when the measurement result is RSRP, since the first measurement result is smaller than the second measurement result based on different beam directions, according to the expression form of formula (3), X should be a positive value, that is, based on formula (2).
  • X Rsrp 2 - Rsrp 1 .
  • X should be a positive value, and the side link transmission power can also be appropriately increased by X dB.
  • X first measurement result - second measurement result.
  • the first terminal device determines the transmit power of the side link according to the difference between the first measurement result and the second measurement result. The specific method is described in the previous paragraph and will not be described here.
  • the first terminal device determines the edge link transmission power according to the antenna pattern of the first beam direction and the relative angle between the first beam direction and the second beam direction. For example, the first terminal device obtains the antenna gain relative values of the two beam directions according to the antenna pattern, and superimposes it into the formula (2). The specific method is described in the previous paragraph and will not be described here.
  • the first terminal device may further determine the first path loss value or the equivalent path according to the N third measurement results (path loss measured based on each third beam direction) The value of the loss. Then, the terminal device obtains the formula (4) based on the formula (2).
  • the first terminal device may further determine the value of the first path loss value or the equivalent path loss according to the first measurement result and the N third measurement results (path loss measured based on each third beam direction). Then, the terminal device obtains the formula (4) based on the formula (2).
  • P CMAX is the maximum transmit power
  • M is the side link bandwidth
  • P O is the transmit power reference value or initial transmit power
  • ⁇ is the path loss compensation factor
  • PL eq is the equivalent path loss (or first path loss)
  • PL eq is a second path loss value determined according to at least one measurement result
  • ⁇ is taken to be 1 or, in formula (4), there is no ⁇ .
  • the first terminal device may take an arithmetic mean of the N third measurement results, that is, sum the path loss measured based on each third beam direction, and then divide the beam direction number to obtain an equivalent path loss: Or the first terminal device may take an arithmetic mean of the first measurement result and the N third measurement results to obtain an equivalent path loss: The meanings of the variables are described above and will not be described here.
  • the formula (4) can be specifically:
  • P PSSCH min ⁇ P CMAX,PSSCH ,10log 10 (M PSSCH )+P O_PSSCH,1 + ⁇ PSSCH,1 ⁇ PL eq ⁇ (4)
  • the first terminal device may further determine the N third measurement results (path loss measured based on each third beam direction), or according to the first measurement result and the N third measurements. The result is determined by the first path loss or equivalent path loss. Then, the terminal device obtains the formula (5) based on the formula (3):
  • P CMAX is the maximum transmit power
  • M is the edge link bandwidth
  • P O is the transmit power reference value or initial transmit power
  • ⁇ is the path loss compensation factor
  • PL eq is the equivalent path loss
  • X is the power adjustment value
  • the operation of this step may be implemented by the modem processor 304 of any one of the terminal devices 111-114.
  • S401 and S405 may be separately implemented.
  • S400, S401, and S405 may be separately implemented.
  • the terminal device can perform the method according to the embodiment of the present invention, can more precisely control the edge link transmission power based on the beam direction, and reduce interference to the cellular link; further, it can also be improved. Side link communication quality.
  • the foregoing embodiment may further extend to a link between the base station and the base station.
  • the first to fourth terminal devices in the foregoing embodiments may be replaced with the first to fourth network devices, respectively.
  • the first network device to the fourth network device may be a macro station and a macro station, a macro station small station, a small station and a small station, a primary cell and a primary cell, a secondary cell and a secondary cell, a primary cell and a secondary cell.
  • the link between each network device is a backhaul link.
  • S401 may be combined with S401 in the foregoing embodiment
  • S405 may be implemented separately or in combination with S400, S401, and S405 in the foregoing embodiment.
  • the invention is not limited.
  • the synchronization signal SS Synchronization Signal
  • CSI-RS Channel State Information Reference Signal
  • DCI Downlink Control Information
  • the UE needs to know the amplitude of the symbol where the DCI information is located in advance, so that the UE can accurately adjust the gain of the automatic gain control AGC (Automatic Gain Control) of the receiver.
  • the factor is such that the demodulation of the DCI has the largest signal to noise ratio (SNR).
  • an embodiment of the present invention provides a method.
  • the transmit power offset value between the RS and the DCI is determined by configuring a reference signal RS of the DCI quasi-co-location QCL (Quasi-Colocation) to be received by the UE, and according to the type of the DCI or the phase of the connected network in which the UE is located.
  • the terminal device UE determines the optimal gain control factor for receiving the DCI based on this power deviation and the signal strength of the detected RS, thereby achieving the optimal SNR of the UE receiver.
  • a method for transmitting downlink control information DCI wherein the network device determines a power offset between the DCI and the reference signal RS according to a type of the downlink control information DCI; wherein the type of the DCI includes: A DCI of the first type and a DCI of the second type; the first type of DCI includes any one of the following: a DCI indicating a system message, a DCI indicating a random access response, a DCI indicating a paging message, and the second type
  • the DCI includes any one of a few: a DCI indicating user-specific data, a DCI indicating a group of users, and a DCI and the reference signal.
  • the determining, by the network device, the power offset between the DCI and the RS according to the type of the DCI includes: indicating, by using system information or a predefined manner, a transmit power between the first type of DCI and the RS Poor, a Radio Resource Control (RRC) message is used to indicate a difference in transmit power between the second type of DCI and the RS.
  • RRC Radio Resource Control
  • the determining, by the network device, the power offset between the DCI and the RS according to the type of the DCI includes determining, by using a predefined manner, when the first type of DCI is the DCI indicating the first system message. a difference in transmit power between the DCI and the reference signal; when the first type of DCI is a DCI indicating a first system message, using a first system message to indicate transmission between the DCI and the reference signal Poor power.
  • a downlink control information DCI receiving method including: the terminal device acquires power deviation information between the downlink control information and the reference signal according to the type of the DCI; wherein the type of the DCI includes: the first type of DCI And a second type of DCI; the first type of DCI includes any one of: a DCI indicating a system message, a DCI indicating a random access response, a DCI indicating a paging message, and a second type of DCI including less Any one of the following: a DCI indicating user-specific data, indicating a DCI common to a group of users; receiving the DCI.
  • the acquiring, by the terminal device, the power deviation information between the DCI and the reference signal according to the type of the DCI comprises: acquiring, between the first type of DCI and the reference signal, from the system information or the predefined information.
  • the power difference is obtained from a Radio Resource Control (RRC) message to obtain a difference in transmit power between the second type of DCI and the reference signal.
  • RRC Radio Resource Control
  • the acquiring, by the terminal device, the power deviation information between the DCI and the reference signal according to the type of the DCI includes: when the first type of DCI is the DCI indicating the first system message, acquiring according to a predefined manner. a difference in transmit power between the DCI and the reference signal; when the first type of DCI is a DCI other than the first system message, acquiring between the DCI and the reference signal according to the first system message The transmission power is poor.
  • the terminal device receives the DCI according to the reference signal and power deviation information between the DCI and the reference signal.
  • the terminal device determines, according to the received signal strength of the reference signal and a power deviation between the DCI and the reference signal, a gain control factor for receiving the DCI, the terminal The device receives the DCI based on the gain control factor.
  • the terminal device if the terminal device does not establish an RRC connection, the terminal device acquires a transmit power difference between the first type of DCI and the reference signal according to the system information or the predefined information. And if the second device has established an RRC connection, the terminal device acquires a transmit power difference between the second type of DCI and the reference signal according to a radio resource control (RRC) message.
  • RRC radio resource control
  • the power deviation between the DCI and the reference signal includes: a power between the lower DCI and the reference signal, or a transmit power on a subcarrier where the DCI is located, and the The power difference between the transmit powers on the subcarriers where the reference signal is located.
  • the number of bits indicating a power deviation between the first type of DCI and the reference signal is less than the number of bits indicating a power deviation between the second type of DCI and the reference signal.
  • the reference signal is a synchronization signal or a channel state information reference signal (CSI-RS) or a tracking reference signal (TRS).
  • CSI-RS channel state information reference signal
  • TRS tracking reference signal
  • the downlink control information common to the group of users includes any one of the following:
  • Downlink control information indicating resource preemption; downlink control information indicating a slot format; and downlink control information indicating power control indication information.
  • the DCI has a quasi-co-location relationship with the reference signal.
  • the network device determines a power deviation value of the transmit DCI and the reference signal RS.
  • the RS here may be an SS for synchronization, a CSI-RS for measurement, or a TRS (Tracking RS) for synchronization at the time.
  • the invention does not limit this
  • the network device determines a power deviation value of the DCI and the reference signal RS according to the type of the DCI.
  • the downlink control information DCI can be divided into two types.
  • the first type of downlink control information includes any one of the following: downlink control information indicating a system message, downlink control information indicating a random access response, and downlink control information indicating a paging message.
  • the second type of downlink control information includes any one of the following: downlink control information indicating user-specific data, and downlink control information common to a group of users, wherein downlink control information common to a group of users includes the following Any one of: downlink control information indicating resource preemption; downlink control information indicating a slot format; and downlink control information indicating power control indication information.
  • the downlink control information common to these groups of users is sent to a group of UEs.
  • This group of UEs may be in a similar area in the spatial direction or have the same transmission characteristics.
  • the different types of downlink control information are scrambled by using a corresponding Radio Network Temporary Identity (RNTI).
  • RNTI Radio Network Temporary Identity
  • the downlink control information indicating the resource preemption may use the Interruption-RNTI (INT-RNTI) to perform DCI CRC scrambling;
  • the downlink control information indicating the slot format may use the slot format indicator RNTI (Slot Format Indicator RNTI) , SFI-RNTI) to perform DCI CRC scrambling;
  • downlink control information indicating power control indication information may use Transmission Power Control Physcial Uplink Shared Channel (TPC-PUSCH-RNTI) or TPC-PUCCH - RNTI or TPC-SRS-RNTI for CRC scrambling of DCI.
  • the UE-specific downlink control information may be used to perform DCI CRC scrambling using UE-specific C-RNTI or CS-RNTI(s) or TC-RNTI or SP-CSI-RNTI.
  • the possible reasons for dividing the DCI into two categories include that the UE can only receive the first type of downlink control information and cannot receive the second type of downlink control information before establishing an RRC (Radio Resource Control) connection.
  • RRC Radio Resource Control
  • Another reason is that the direction of the beam of the first type of downlink control information is often broadcast or not directed to users in a specific direction, and its beam is wider; and the direction of the second type of downlink control information is often multicast or unicast. It points to a user in a particular direction, and its beam is narrower. The antenna gain of the narrower beam in the transmit direction is stronger, so the transmit power above it can be different from the DCI with a wider beam direction.
  • the UE it is necessary to indicate the power difference between the downlink control information and the reference signal from the UE according to the type of different downlink control information or the connection phase in which the UE is located. For example, if the UE is in the RRC establishment, the UE cannot receive the power difference between the downlink control information and the reference signal through the RRC message. Conversely, after the UE establishes the RRC connection, the RRC message can be used to indicate the power difference between the downlink DCI and the RS.
  • the above RS has a QCL relationship with the DCI to be used by the UE's receiver for the adjustment of the automatic gain control.
  • the QCL relationship includes that the two RSs have the same beam direction, or the same receive beam can be used to receive two types of RSs, or one or more of the channel parameters of the two RSs are determined to be the same.
  • the physical meaning is that the DCI and the RS are transmitted from the same or similar spatial direction, or have experienced the same or similar spatial transmission channels, so as not to affect the UEs to treat them equivalently as signals transmitted in the same direction, Will produce too much error or impact.
  • the operation of this step is performed by the controller/processor 201 of any one of the network devices 101-102.
  • the network device sends power difference information between the DCI and the RS to the terminal device.
  • the terminal device receives power difference information between the DCI and the RS from the network device.
  • the network device notifies the power difference information between the first type of DCI and the RS through the system information block 1 (SIB1).
  • SIB1 system information block 1
  • the power difference information between the DCI and the RS indicating the SIB1 transmission may be determined by a protocol predefined manner.
  • the terminal device determines the optimal gain control factor for receiving the DCI by using the power difference information predefined by the protocol.
  • SIB1 also indicates the power difference between the DCI and the RS
  • the information in the SIB1 is used to overwrite the predefined information. That is, the UE determines the power difference between the DCI indicating the SIB1 and the RS based on the indication information in the SIB1, or determines the power difference between the DCI and the RS indicating the first type of DCI.
  • the power difference between the downlink DCI and the RS may be defined by the transmit power on the symbol where the physical downlink control signal PDCCH (Physical Downlink Control Channel) where the DCI is located and the transmit power of the symbol where the RS is located.
  • PDCCH Physical Downlink Control Channel
  • the power difference between the transmit power on the subcarrier where the downlink DCI is located and the transmit power on the subcarrier where the RS is located is defined.
  • the invention is not limited thereto. In general, because the bandwidth between the RS and the DCI is different, the power difference on the subcarriers can be used to define fewer bits to use.
  • the network device notifies the power difference information between the second type of DCI and the RS through a dedicated RRC message.
  • the power difference between the first type of control information and the RS is smaller. Fewer bits can be used to indicate the power difference between the first type of DCI and the RS, thereby achieving the purpose of reducing air interface signaling. Further, since the power difference between the first type of DCI and the RS is indicated in the system message, reducing the overhead of the system message is also important for the transmission efficiency of the network, so fewer bits can be used to indicate the first The power difference between DCI and RS.
  • the operations sent in this step may be implemented by the transceiver 202 of any one of the network devices 101-102, or may be implemented by the controller/processor 201 of the network device 101 and the transceiver 202. .
  • the operation received in this step may be implemented by the transceiver 301 of any one of the terminal devices 111-114, or may be a modem processor of any one of the terminal devices 111-114.
  • 304 is implemented with transceiver 301.
  • the terminal device determines a power control factor for receiving the DCI, and receives the DCI. Specifically, the terminal device determines, according to the received signal strength of the reference signal, a type of the DCI, and a power deviation between the downlink DCI and the RS, a gain control factor for receiving the downlink DCI, where the terminal device receives according to the gain control factor.
  • the DCI For example, the UE first receives the RS, and the obtained power range of the signal has a fluctuation range of [-50, -80] dBm and the power of the DCI is 5 dB higher than the RS. The UE can know that the fluctuation range of the downlink DCI signal is [- 45, -75] dBm.
  • the UE can determine the gain factor of the appropriate AGC for the reception of the DCI, thereby obtaining the quantized value after the Analog-to-Digital Converter (ADC) of the positive DCI, thereby obtaining the optimal receiving SNR of the DCI. .
  • the UE may set the gain factor of the erroneous AGC, resulting in a decrease in the received SNR.
  • the gain range of the receiving DCI is still adjusted to be the same as that of the receiving RS [-50, -80] dBm
  • the signal of the DCI of the signal quantized by the ADC will be 5 dB less than the actual signal. This is something that needs to be avoided and circumvented in wireless communication systems.
  • the operation received in this step may be implemented by the modem processor 304 of any one of the terminal devices 111-114, or may be the modulation solution of any one of the terminal devices 111-114.
  • the processor 304 and the transceiver 301 are implemented together.
  • the terminal device can better receive different types of DCI according to more accurately determining the gain control factors of the first type DCI and the second type DCI. At the same time, the system signaling overhead can be effectively reduced.
  • the present invention also provides an apparatus (e.g., an integrated circuit, a wireless device, a circuit module, etc.) for implementing the above method.
  • an apparatus e.g., an integrated circuit, a wireless device, a circuit module, etc.
  • the means for implementing the power tracker and/or power generator described herein may be a stand-alone device or may be part of a larger device.
  • the device may be (i) a self-contained IC; (ii) a set having one or more 1Cs, which may include a memory IC for storing data and/or instructions; (iii) an RFIC, such as an RF receiver or RF transmitter (iv) an ASIC, such as a mobile station modem; (v) a module that can be embedded in other devices; (vi) a receiver, a cellular phone, a wireless device, a handset, or a mobile unit; (vii) other, etc. Wait.
  • a self-contained IC may include a memory IC for storing data and/or instructions; (iii) an RFIC, such as an RF receiver or RF transmitter (iv) an ASIC, such as a mobile station modem; (v) a module that can be embedded in other devices; (vi) a receiver, a cellular phone, a wireless device, a handset, or a mobile unit; (vii) other, etc. Wait.
  • the method and apparatus provided by the embodiments of the present invention may be applied to a terminal device or an access network device (which may be collectively referred to as a wireless device).
  • the terminal device or access network device or wireless device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system.
  • the application layer includes applications such as browsers, contacts, word processing software, and instant messaging software.
  • the embodiment of the present invention does not limit the specific structure of the execution body of the method, as long as the transmission signal according to the embodiment of the present invention can be executed by running a program recording the code of the method of the embodiment of the present invention.
  • the method can be communicated.
  • the execution body of the method for wireless communication in the embodiment of the present invention may be a terminal device or an access network device, or a function capable of calling a program and executing a program in the terminal device or the access network device. Module.
  • a computer readable medium may include, but is not limited to, a magnetic storage device (eg, a hard disk, a floppy disk, or a magnetic tape, etc.), such as a compact disc (CD), a digital versatile disc (DVD). Etc.), smart cards and flash memory devices (eg, erasable programmable read-only memory (EPROM), cards, sticks or key drivers, etc.).
  • a magnetic storage device eg, a hard disk, a floppy disk, or a magnetic tape, etc.
  • CD compact disc
  • DVD digital versatile disc
  • Etc. smart cards and flash memory devices (eg, erasable programmable read-only memory (EPROM), cards, sticks or key drivers, etc.).
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, without limitation, a wireless channel and various other mediums capable of storing, containing, and/or carrying instructions and/or data.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more of the available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and the present invention should not be The implementation of the embodiments constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the embodiments of the present invention, or the part contributing to the prior art or the part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or an access network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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

Abstract

Des modes de réalisation de la présente invention concernent un procédé et un appareil pour déterminer une puissance d'émission. Dans le procédé et l'appareil, un équipement terminal mesure, sur la base d'une ou de plusieurs directions de faisceau, un signal envoyé par un dispositif réseau, de façon à obtenir un ou plusieurs résultats de mesure, la direction du faisceau comprenant une direction utilisée par l'équipement terminal sur une liaison latérale et comprenant également une direction de faisceau utilisée par l'équipement terminal sur une liaison cellulaire. L'équipement terminal détermine un paramètre de commande de puissance, le paramètre de commande de puissance étant déterminé sur la base du ou des résultats de mesure, et ajuste la puissance d'émission de liaison latérale en fonction du paramètre de commande de puissance. L'équipement terminal rapporte lesdits un ou plusieurs résultats de mesure au dispositif réseau, et le dispositif réseau détermine le paramètre de commande de puissance sur la base des résultats de mesure et envoie le paramètre de commande de puissance à l'équipement terminal, de sorte que l'équipement terminal ajuste la puissance de transmission de liaison latérale en fonction du paramètre de commande de puissance. Par conséquent, la puissance d'émission de liaison latérale est commandée plus précisément et l'interférence, de la communication de liaison latérale au dispositif réseau, est réduite.
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