WO2022001241A1 - Procédé et dispositif de gestion de faisceau - Google Patents

Procédé et dispositif de gestion de faisceau Download PDF

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Publication number
WO2022001241A1
WO2022001241A1 PCT/CN2021/083365 CN2021083365W WO2022001241A1 WO 2022001241 A1 WO2022001241 A1 WO 2022001241A1 CN 2021083365 W CN2021083365 W CN 2021083365W WO 2022001241 A1 WO2022001241 A1 WO 2022001241A1
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Prior art keywords
information
terminal device
network device
reference signal
preset condition
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PCT/CN2021/083365
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English (en)
Chinese (zh)
Inventor
余小勇
薛祎凡
邝奕如
徐海博
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/025—Services making use of location information using location based information parameters
    • H04W4/027—Services making use of location information using location based information parameters using movement velocity, acceleration information
    • 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
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a beam management method and apparatus.
  • Wireless network technology has developed into the era of the fifth generation mobile communication technology (5th-Generation, 5G).
  • 5G fifth generation mobile communication technology
  • eMTC and uRLLC will be able to provide 10Gbits per second uplink and downlink throughput for each cell.
  • eMBB will use a wider range of spectrum resources, extending from the low frequency band used by LTE to high frequency bands (such as 28GHz, 39GHz) Wait).
  • High-frequency electromagnetic waves have the characteristics of high path loss.
  • a signal transmission mechanism based on beamforming technology is introduced to compensate by larger antenna gain. Transmission loss during signal propagation.
  • the beam management method adopted in the existing system is to transmit a synchronization signal broadcast channel block (synchronization signal/PBCH block, SSB) for initial access and beam tracking, and after access, through the SSB and channel state information reference signal (channel state information-reference signals, referred to as CSI-RS) for beam management.
  • SSB synchronization signal broadcast channel block
  • CSI-RS channel state information reference signal
  • the current beam management method is not suitable for all scenarios. For example, when the terminal equipment moves, the terminal equipment fails to timely The system cannot measure the reference signal, or the configured transmission reference signal beam used to track the working beam remains unchanged, or the terminal equipment moves at a high speed and the service quality deteriorates, but the system still maintains the previous measurement period. The optimal beam pair is measured. For another example, if the terminal device is in a stationary state or moves at a slow speed, the system still maintains the previous measurement period, and frequent measurements will increase the power consumption of the terminal device.
  • Embodiments of the present application provide a beam management method and apparatus, so as to provide a reasonable beam management manner.
  • an embodiment of the present application provides a beam management method, and the method may be executed by a network device, such as a base station, or may be executed by a chip in the network device.
  • the method includes: the network device receives first information sent by the terminal device, where the first information includes location information of the terminal device and/or movement speed information of the terminal, and the network device adjusts the beam management strategy at least according to the first information.
  • the method may be performed by a network device, and the network device may be a communication device or a communication device, such as a chip, capable of supporting the functions required by the communication device to implement the method.
  • the network device may be a chip provided in the network device for implementing the function of the network device, or other components for implementing the function of the network device.
  • a network device is directly used as an example for description.
  • the network device receives the first information sent by the terminal device, which includes the location information of the terminal device and/or the moving speed information of the terminal device. After receiving the first information, the network device can determine the relationship between the network device and the terminal device. Whether the communication performance between them is degraded, so as to adjust the beam management strategy according to the first information, so as to provide a reasonable beam management mode, which is helpful to improve the communication experience.
  • the network device in the first aspect may adjust the beam management strategy according to the first information in the following manner:
  • Implementation mode 1 In the case where the first preset condition is satisfied, the network device adjusts the first beam in the working state of the network device to the second beam based on the location information, or adjusts the network device to the second beam.
  • the first beam pair in the working state between the terminal devices is adjusted to be the second beam pair.
  • the first preset condition includes at least one of the following:
  • Condition 1 According to the location information, it is determined that the current location of the terminal device changes relative to the location of the terminal device corresponding to the working beam on the network device;
  • the demodulation reference signal DMRS performance parameter of the physical uplink shared channel PUSCH or the physical uplink control channel PUCCH is less than the first threshold value
  • Condition 3 When the first information is received, the first indication information has not been sent to the terminal device, and the first indication information is used to instruct the terminal device to measure the reference signal.
  • the network device makes a comprehensive judgment according to the demodulation performance of the DMRS of the uplink PUCCH or PUSCH, whether the current position of the terminal device and the last reference signal measurement position have changed, and whether the timing of the next reference signal measurement is reached,
  • the network device actively adjusts the working beam or the working beam pair, so that the communication experience can be improved.
  • the first information may further include moving direction information of the terminal device, and when the second preset condition is satisfied, the network device adjusts the beam used for sending the reference signal based on the location information and the moving direction information;
  • the reference signal is used to track the working beam; and the second preset condition includes at least one of the following:
  • Condition 1 According to the moving speed information, it is determined that the moving speed of the terminal device is greater than or equal to the first speed threshold;
  • Condition 2 According to the location information, it is determined that the distance between two adjacent measurement locations of the terminal device is greater than the first distance threshold.
  • the network device makes a comprehensive judgment according to the demodulation performance of the DMRS of the uplink PUCCH or PUSCH, the moving speed information of the terminal device, and the distance between two adjacent measurement positions of the terminal device.
  • the network device actively adjusts the beam used for sending the reference signal based on the location information and the moving direction information, which helps to track the optimal working beam, thereby improving the communication experience.
  • Implementation mode 3 When the third preset condition is satisfied, the network device lengthens the measurement period for measuring the optimal beam based on the reference signal according to the moving speed information of the terminal device, wherein the third preset condition includes the following: At least one:
  • the DMRS performance parameter of PUSCH or PUCCH is greater than or equal to the first threshold
  • Condition 2 According to the moving speed information, it is determined that the moving speed of the terminal device is less than the second speed threshold.
  • the DMRS performance parameter of the network device on the PUSCH or PUCCH does not deteriorate or deteriorates but is not lower than the first threshold value, and the moving speed of the terminal device is lower than the second speed threshold, the network device
  • the information of the moving speed of the device and the lengthening of the measurement period for measuring the optimal beam based on the reference signal help to reduce the system time-frequency domain overhead and reduce the power consumption of the terminal device for CSI-RS measurement.
  • Implementation mode 4 In the case where the fourth preset condition is satisfied, the network device shortens the measurement period for measuring the optimal beam based on the reference signal according to the moving speed information of the terminal device, wherein the fourth preset condition includes at least one of the following contents: One:
  • Condition 1 the DMRS performance parameter of PUSCH or PUCCH is less than the first threshold
  • Condition 2 According to the moving speed information, it is determined that the moving speed of the terminal device is greater than or equal to the third speed threshold.
  • the network device can shorten the speed based on the movement speed information of the terminal device.
  • the reference signal measures the measurement period of the optimal beam, which helps to measure the optimal working beam.
  • the network device may also send a query message to the terminal device before receiving the first information sent by the terminal device, where the query message is used to instruct the terminal device to report the first information.
  • the network device may acquire the first information from the terminal device by actively querying.
  • an embodiment of the present application provides a communication apparatus, where the communication apparatus may be an apparatus for beam management, for example, a network device, or a chip in the network device.
  • the apparatus has the function of implementing the above-mentioned first aspect or any embodiment of the first aspect. This function can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication device may include a processing unit and a transceiving unit.
  • an embodiment of the present application provides a communication device, which may be a device for beam management, including a processor and a memory; the memory is used to store computer-executed instructions, and when the device runs, the processor The computer-executable instructions stored in the memory are executed to cause the apparatus to perform the method of the first aspect above or any embodiment of the first aspect.
  • an embodiment of the present application provides a communication device, which may be a device for beam management, and includes a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit, and execute the above-mentioned first step.
  • the processor includes one or more.
  • an embodiment of the present application provides a communication apparatus, which may be an apparatus for beam management, and includes a processor that is connected to a memory and used to call a program stored in the memory to execute the above-mentioned The method of the first aspect or any embodiment of the first aspect.
  • the memory may be located within the communication device or external to the communication device.
  • the processor includes one or more.
  • embodiments of the present application further provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium runs on a computer, the processor causes the processor to execute the first aspect or the first aspect The method of any embodiment of .
  • the embodiments of the present application further provide a computer program product including instructions, which, when executed on a computer, cause the computer to execute the method of the first aspect or any embodiment of the first aspect.
  • FIG. 1 is a schematic diagram of the architecture of a communication system to which an embodiment of the application is applied;
  • FIG. 2 is a schematic diagram of beam tracking based on a reference signal according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of the configuration of a transmission reference signal beam used for tracking a working beam according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of reference signal measurement for beam management provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a beam management method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of another reference signal-based beam tracking provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another transmission reference signal beam configuration for tracking a working beam provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a communication device according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of still another communication apparatus provided by an embodiment of the present application.
  • LTE long term evolution
  • 5G fifth generation
  • NR new radio
  • FIG. 1 is a schematic diagram of the architecture of a communication system to which the embodiments of the present application can be applied.
  • the 5G NR system mainly performs beamforming on signals through an antenna array to achieve precise narrow beam pairing.
  • User provides services.
  • the communication system includes: terminal equipment and network equipment.
  • Terminal equipment also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • the terminal device includes a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • terminal devices can be: mobile phones (mobile phones), tablet computers, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices (such as smart watches, smart bracelets, pedometers, etc.) , in-vehicle equipment (for example, cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed rail, etc.), virtual reality (VR) equipment, augmented reality (AR) equipment, industrial control (industrial control) wireless terminals, smart home equipment (such as refrigerators, TVs, air conditioners, electricity meters, etc.), intelligent robots, workshop equipment, wireless terminals in self-driving, wireless terminals in remote medical surgery, A wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, or a wireless terminal in a smart home, flying equipment (for example, Intelligent robots, hot air balloons, drones, airplanes), etc.
  • in-vehicle equipment for example, cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed rail, etc.
  • the terminal device may further include a relay (relay).
  • a relay relay
  • any device capable of data communication with the base station can be regarded as a terminal device.
  • a network device may be a node in a radio access network (RAN), also known as a base station, or a RAN node (or device).
  • RAN radio access network
  • examples of some network devices 101 are: general node B (gNB), new radio node B (NR-NB), transmission reception point (TRP), evolved node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS) , home base station (for example, home evolved NodeB, HeNB; or home Node B, HNB), base band unit (BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), Or 5G communication systems or network-side devices in possible future communication systems, etc.
  • gNB general node B
  • NR-NB new radio node B
  • TRP transmission reception point
  • eNB
  • the apparatus for implementing the function of the network device may be the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system, and the apparatus may be installed in the network device.
  • the technical solutions provided by the embodiments of the present application the technical solutions provided by the embodiments of the present application are described by taking the network device as an example for the apparatus for implementing the function of the network device.
  • 5G NR systems will have a wider spectrum range (within GHz). Since the signal is in the high frequency range, it will suffer more path loss and signal fading than the low frequency signal, and the signal change will be more drastic. Based on this, the NR system can realize the centralized transmission of signals in a certain direction by using massive multiple-input-multiple-output (MIMO) and multi-beam technology, which enhances the signal resistance. fading ability. Both network devices and end devices communicate using narrower beams, so better communication quality is only achieved when the beam used for transmission is aligned with the beam used for reception.
  • MIMO massive multiple-input-multiple-output
  • the beam sweeping (beam sweeping) process will be used in 5G NR to determine the beam pair (transmitting beam and receiving beam) between the network device and the terminal device.
  • the network device's The working beam is the sending beam
  • the working beam of the terminal equipment is the receiving beam
  • the working beam of the terminal equipment is the sending beam
  • the working beam of the network equipment is the receiving beam.
  • Beam management refers to a series of operations on the network equipment side and the terminal equipment side to acquire and manage the user's downlink and uplink beam transmission/reception, including beam selection, beam measurement, beam reporting, and beam scanning. Beam management is performed based on a series of reference signals, and network devices or terminal devices use different transmit or receive beams on these reference signals to scan the beams. The terminal device or the network device performs measurement based on the scanned beam, further performs the beam selection process, and feeds back the selected result.
  • a network device or a terminal device When a network device or a terminal device sends a signal, it needs to be able to send the signal in a direction that reaches the receiving end with the best signal quality.
  • the direction is found by evaluating the quality of a specific reference signal from each of the multiple beams of the terminal device, and the best beam is selected.
  • the terminal device finds the direction by evaluating the quality of a specific reference signal from each of the plurality of beams of the network device and selects the best beam.
  • a network device or a terminal device When a network device or a terminal device receives a signal, it needs to be able to receive the signal from the transmitter with the best signal quality. Before the network device receives a signal from the terminal device, it first obtains the information of the best direction from the terminal device in the form of a CSI report. When the terminal device receives the signal from the network device, it first obtains the best direction information from the network device.
  • At least one refers to one or more, and "a plurality” refers to two or more.
  • “And/or”, which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an "or” relationship.
  • “At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • at least one item (a) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple .
  • the reference signals configured by the network device cannot meet all scenarios. Taking the network device as the gNB and the terminal device as the UE as an example, several scenarios are listed below for specific description.
  • the network device configures the reference signal for beam tracking and adjustment.
  • the UE fails to measure the reference signal in time at a certain moment, and the system The optimal beam pair cannot be adjusted, resulting in degraded communication experience.
  • the reference signal may be a synchronization/physical broadcast channel block (synchronization/physical broadcast channel block, SSB) and/or a channel state information-reference signal (channel state information-reference signal, CSI-RS).
  • FIG. 2 it is a schematic diagram of beam tracking based on a reference signal according to an embodiment of the present application.
  • the gNB side has four beams, namely Bt1, Bt2, Bt3, and Bt4, and the UE side has four beams, namely Br1, Br2, Br3, and Br4.
  • the UE is in position A
  • the working beam on the gNB side is Bt1
  • the working beam on the UE side is Br3
  • the working beam pair is (Bt1/Br3).
  • the UE moves to the right, and at time 2, the UE arrives at position B.
  • the UE and the gNB measure the measurement beam based on the reference signal CSI-RS/SSB respectively. It should be noted that among all the beams on the gNB side, the beams except the working beam and the measurement beam are called other beams.
  • the beams except the working beam and the measurement beam are called other beams. beam.
  • the UE continues to move to the right.
  • the UE moves slightly relative to position B and arrives at position B'.
  • the UE obtains the measurement result measured at time 2, that is, the optimal beam pair (Bt1/Br2) is obtained, And adjust the working beam to the optimal beam pair (Bt1/Br2).
  • the UE continues to move to the right and reaches position C at time 3.
  • the optimal beam pair has become (Bt2/Br1), but since there is no reference signal CSI-RS/SSB, it cannot be adjusted to the optimal beam based on the measurement results.
  • Bt2/Br1 still keep the previous working beam pair (Bt1/Br2).
  • the UE continues to move to the right.
  • the UE arrives at the position D, and the next measurement period is reached.
  • the base station obtains the optimal beam pair (Bt2/Br1) based on the measurement results of the reference signal CSI-RS/SSB measurement. Therefore, The system adjusts the working beam pair to the optimal beam pair (Bt2/Br1).
  • the UE continues to move.
  • the system cannot adjust to the optimal beam pair (Bt2/Br1). Instead, the previous beam pair (Bt1/Br2) will continue to work, the communication experience will be degraded, and in severe cases, service will be interrupted.
  • the gNB side when the UE configures the sending reference signal beam for tracking the working beam, the gNB side usually takes the current working beam as the center, and uses the surrounding beams of the working beam to track the reference signal.
  • FIG. 3 it is a schematic diagram of the configuration of a reference signal beam for tracking a working beam according to an embodiment of the present application.
  • the working beam of the gNB is Bt12
  • the configured transmit reference signal beams for tracking the working beam are Bt7, Bt11, Bt13, and Bt17.
  • the UE moves to the right, and at time 2, the gNB still measures based on the previously configured beams Bt7, Bt11, Bt13 and Bt17 for tracking the reference signal, and selects the optimal beam from the beams Bt7, Bt11, Bt13 and Bt17 as the work Beam, but the UE has moved at time 2 relative to time 1, the optimal beam on the gNB side should actually be Bt15, so the optimal beam selected by gNB from beams Bt7, Bt11, Bt13 and Bt17 is not gNB
  • the optimal beam at time 2 causes the gNB's communication experience to be degraded at time 2, and in severe cases, services will be interrupted.
  • the UE moves, and the transmit reference signal beam configured at time 1 for tracking the working beam cannot meet the measurement requirements at time 2, but the current beam management strategy cannot know how to configure more reasonable use at time 2. It is used to track the transmit reference signal beam of the working beam to ensure that a better beam pair can be measured.
  • the sending reference signal beam used for tracking the working beam involved in the embodiments of the present application may be understood as a beam used for sending reference signals, where the reference signal is used for tracking the working beam, which will not be described in detail below.
  • the measurement period for measuring the optimal beam based on the reference signal is fixed.
  • FIG. 4 it is a schematic diagram of reference signal measurement oriented to beam management according to an embodiment of the present application.
  • the current beam management strategy is performing periodic measurement or semi-static measurement, but no matter whether the UE moves or the service experience changes, all The measurement of the optimal beam is performed while maintaining a fixed measurement period.
  • the CSI-RS measurement period is too short, which will waste the time-frequency domain resources of the system, and the UE needs to measure and report the reference signal. , frequent measurements will lead to an increase in the power consumption of the end device.
  • the system still maintains the previous CSI-RS measurement period, which will cause the reference signal measurement to fail to track the optimal beam pair.
  • the current beam management strategy cannot provide a reasonable beam management method for the above-mentioned situations, resulting in degraded communication experience.
  • FIG. 5 it is a schematic flowchart of a beam management method according to an embodiment of the present application. As shown in Figure 5, the method flow includes the following steps:
  • Step 501 the network device sends a query message to the terminal device, where the query message is used to instruct the terminal device to report the first information.
  • the terminal device receives the query message sent by the network device.
  • Step 502 The terminal device sends first information to the network device, where the first information includes location information of the terminal device and/or movement speed information of the terminal.
  • the network device receives the first information sent by the terminal device.
  • the location information of the terminal device may include the current location of the terminal device and the position measured by the terminal device in the last reference signal, and the movement speed information of the terminal device is used to indicate the movement speed of the terminal device.
  • the terminal device may be a terminal device in an RRC connected state or an RRC active state.
  • step 501 is an optional step, that is, the terminal device may actively report the first information to the network device, for example, periodically reporting the first information, or after receiving the query message sent by the network device , the terminal device sends the first information to the network device.
  • Step 503 the network device adjusts the beam management policy according to at least the first information.
  • an implementation manner of adjusting the beam management policy by the network device according to the first information may include:
  • Implementation mode 1 When the first preset condition is satisfied, the network device adjusts the first beam in the working state of the network device to the second beam based on the location information, or adjusts the working state between the network device and the terminal device. The first beam pair of is adjusted to the second beam pair.
  • the working beam pair may be updated through RRC reconfiguration.
  • the second beam is the beam in the direction in which the signal sent by the network device can reach the terminal device with the best signal quality, that is, the current optimal beam.
  • the second beam pair includes a transmit beam in a direction in which a signal reaching the receiving end with the best signal quality can be transmitted and a receive beam in a direction in which a signal with the best signal quality can be received.
  • the first preset condition may include at least one of the following:
  • Condition 1 According to the location information, it is determined that the current location of the terminal device changes relative to the location of the terminal device corresponding to the working beam on the network device;
  • the demodulation reference signal DMRS performance parameter of the physical uplink shared channel PUSCH or the physical uplink control channel PUCCH is less than the first threshold value
  • Condition 3 When the network device receives the first information, it has not yet sent the first indication information to the terminal device, and the first indication information is used to instruct the terminal device to measure the reference signal.
  • the first preset condition includes one of the above three conditions.
  • the network device may adjust the first beam in the working state of the network device to the second beam based on the location information, Alternatively, the first beam pair in the working state between the network device and the terminal device is adjusted to be the second beam pair.
  • the network device may not adjust the beam management strategy, that is, the network device still uses the first beam or the first beam pair measured at the last reference signal measurement position to transmit signals.
  • the beam management strategy is not adjusted.
  • the beam management strategy is not adjusted.
  • the beam management is not adjusted.
  • the optimal beam obtained by measuring according to the first indication information is used as the working beam.
  • the first preset condition includes any two of the above three conditions.
  • the network device may adjust the first beam in the working state of the network device to the first beam based on the location information. Two beams, or, adjusting the first beam pair in the working state between the network device and the terminal device to be the second beam pair.
  • the network device may not adjust the beam management strategy, that is, the network device still uses the first beam or the first beam pair measured at the last reference signal measurement position to transmit signals.
  • the first preset condition includes the above three conditions at the same time, and when the three conditions are satisfied, the network device can adjust the first beam in the working state of the network device to the second beam based on the location information, or , adjust the first beam pair in the working state between the network device and the terminal device to the second beam pair.
  • the network device may not adjust the beam management strategy, that is, the network device still uses the first beam or the first beam pair measured at the last reference signal measurement position to transmit signals.
  • the implementation manner of adjusting the beam management strategy is specifically described below by taking improving the communication experience in the above-mentioned first situation as an example.
  • the UE there are four beams on the gNB side, namely Bt1, Bt2, Bt3, and Bt4, and four beams on the UE side, namely Br1, Br2, Br3, and Br4.
  • the UE is in position A
  • the working beam on the gNB side is Bt1
  • the working beam on the UE side is Br3
  • the working beam pair is (Bt1/Br3).
  • the UE moves to the right, and at time 2, the UE arrives at position B.
  • the UE and the gNB measure the measurement beam based on the reference signal CSI-RS/SSB respectively. It should be noted that among all the beams on the gNB side, the beams except the working beam and the measurement beam are called other beams.
  • the beams except the working beam and the measurement beam are called other beams.
  • the beam UE continues to move to the right.
  • the UE moves slightly relative to position B and arrives at position B'.
  • the UE obtains the measurement result measured at time 2, that is, the optimal beam pair (Bt1/Br2 ), and adjust the working beam to the optimal beam pair (Bt1/Br2).
  • the UE continues to move to the right.
  • the UE arrives at the position C.
  • the next measurement period has not yet arrived.
  • the gNB determines that the UE is within the coverage of the beam Bt2 to the right of the beam Bt1.
  • the Bt2 on the right is determined as the optimal beam on the gNB side.
  • the base station actively adjusts the working beam on the base station side from Bt1 to Bt2, or adjusts the working beam pair to (Bt2/Br1) through RRC reconfiguration.
  • the UE continues to move to the right.
  • the UE arrives at the position D, and the next measurement period is reached.
  • the base station obtains the optimal beam pair (Bt2/Br1) based on the measurement results of the reference signal CSI-RS/SSB measurement. Therefore, The system adjusts the working beam pair to the optimal beam pair (Bt2/Br1).
  • the network device makes a comprehensive judgment according to the demodulation performance of the DMRS of the uplink PUCCH or PUSCH, whether the current position of the terminal device and the last reference signal measurement position have changed, and whether the timing of the next reference signal measurement is reached,
  • the network device actively adjusts the working beam or the pair of working beams, so that the communication experience can be improved.
  • the first information may also include moving direction information of the terminal device.
  • the network device adjusts the beam used for sending the reference signal based on the location information and the moving direction information. Used to track the working beam.
  • the second preset condition may include at least one of the following:
  • Condition 1 According to the moving speed information, it is determined that the moving speed of the terminal device is greater than or equal to the first speed threshold;
  • Condition 2 According to the location information, it is determined that the distance between two adjacent measurement locations of the terminal device is greater than the first distance threshold.
  • the second preset condition includes one of the above two conditions, and when the condition included in the second preset condition is satisfied, the network device may adjust the information for sending the reference based on the location information and the moving direction information. signal beam.
  • the network device may not adjust the beam management strategy, that is, the network device still uses the beam used for sending the reference signal at the last measurement position. For example, when the first condition above is not satisfied, that is, it is determined according to the moving speed information that the moving speed of the terminal device is less than the first speed threshold, the network device does not adjust the beam used for sending the reference signal.
  • the network device when the above-mentioned second condition is not met, that is, it is determined according to the location information that the distance between two adjacent measurement positions of the terminal device is less than or equal to the first distance threshold, the network device does not adjust the beam used for sending the reference signal.
  • the second preset condition includes the above two conditions, and when the above two conditions included in the second preset condition are satisfied, that is, it is determined according to the moving speed information that the moving speed of the terminal device is greater than or equal to the first speed threshold , and it is determined according to the location information that the distance between two adjacent measurement locations of the terminal device is greater than the first distance threshold, and the network device adjusts the beam used for sending the reference signal based on the location information and the moving direction information.
  • the above two conditions included in the second preset condition are not satisfied, that is, it is determined according to the movement speed information that the movement speed of the terminal device is less than the first speed threshold, and the two adjacent measurement positions of the terminal device are determined according to the position information. When the distance between them is less than or equal to the first distance threshold, the network device does not adjust the beam used for transmitting the reference signal.
  • the implementation manner of adjusting the beam management strategy is specifically described below by taking improving the communication experience in the above-mentioned second situation as an example.
  • the working beam of the gNB is Bt12, and the configured candidate beams for tracking the reference signal are Bt7, Bt11, Bt13, and Bt17.
  • the UE moves to the right.
  • the gNB determines that the moving speed of the UE is greater than or equal to the first speed threshold according to the moving speed information, and determines that the distance between two adjacent measurement positions of the UE is greater than the first distance threshold according to the location information.
  • the gNB can determine the distance that the UE moves to the right, thereby determining that the optimal beam at time 2 is Bt15, and then adjusts the candidate beams used for tracking the reference signal to be Bt15, Bt14, Bt10, Bt11 and Bt20, which helps to track the optimal beam direction and improve the communication experience.
  • the network device makes a comprehensive judgment according to the demodulation performance of the DMRS of the uplink PUCCH or PUSCH, the moving speed information of the terminal device, and the distance between two adjacent measurement positions of the terminal device.
  • the network device actively adjusts the transmission reference signal beam used for tracking the working beam based on the location information and moving direction information, which helps to track the optimal working beam, thereby improving the communication experience.
  • the network device when the third preset condition is satisfied, the network device lengthens the measurement period for measuring the optimal beam based on the reference signal according to the moving speed information of the terminal device.
  • the third preset condition may include at least one of the following:
  • the DMRS performance parameter of PUSCH or PUCCH is greater than or equal to the first threshold
  • Condition 2 According to the moving speed information, it is determined that the moving speed of the terminal device is less than the second speed threshold.
  • the specific values of the first threshold value and the second speed threshold value in the embodiments of the present application are not limited.
  • the network device may, according to the moving speed information of the terminal device, extend the reference-based The measurement period of the optimal beam for signal measurement.
  • the network device may not adjust the beam management policy, that is, not adjust the measurement period for measuring the optimal beam based on the reference signal.
  • the third preset condition includes the above two conditions, and when the first and second conditions included in the third preset condition are satisfied, the network device may, according to the moving speed information of the terminal device, extend the measurement based on the reference signal.
  • the measurement period of the optimal beam that is, the DMRS performance parameters of the PUSCH or PUCCH have not deteriorated or have deteriorated but have not fallen below the first threshold, and the moving speed of the terminal device is lower than the second speed threshold
  • the network device can Lengthening the measurement period for measuring the optimal beam based on the reference signal, for example, reconfiguring the CSI-RS measurement period through RRC reconfiguration, helps to reduce the system time-frequency domain overhead and reduce the power consumption of the terminal equipment for CSI-RS measurement.
  • the network device may not adjust the measurement period of the reference signal.
  • Implementation mode 4 When the fourth preset condition is satisfied, the network device shortens the measurement period for measuring the optimal beam based on the reference signal according to the moving speed information of the terminal device;
  • the fourth preset condition may include at least one of the following:
  • Condition 1 the DMRS performance parameter of PUSCH or PUCCH is less than the first threshold
  • Condition 2 According to the moving speed information, it is determined that the moving speed of the terminal device is greater than or equal to the third speed threshold.
  • the specific value of the third speed threshold in the embodiment of the present application is not limited.
  • the fourth preset condition includes one of the above two conditions, and when the condition included in the fourth preset condition is satisfied, the network device shortens the measurement based on the reference signal according to the moving speed information of the terminal device. The measurement period of the optimal beam.
  • the network device does not adjust the beam management policy, that is, does not adjust the measurement period for measuring the optimal beam based on the reference signal.
  • the fourth preset condition includes the above two conditions, that is, when the first and second conditions included in the fourth preset condition are satisfied, the network device shortens the time based on the reference signal according to the moving speed information of the terminal device.
  • the measurement period for measuring the optimal beam that is, the DMRS performance parameter of PUSCH or PUCCH deteriorates to be lower than the first threshold value, and the moving speed of the terminal device is not lower than the second speed threshold value, the network device can shorten it based on the reference
  • the measurement period of the optimal beam for signal measurement for example, the measurement period of the CSI-RS is reconfigured by means of RRC reconfiguration, which helps to solve the problem that a better working beam cannot be measured.
  • the network device When the first and second conditions included in the fourth preset condition are not satisfied, the network device does not adjust the measurement period of the reference signal.
  • the network device receives the first information sent by the terminal device, which includes the location information of the terminal device and/or the movement speed information of the terminal device.
  • the moving speed information is used to determine whether the communication performance between the network device and the terminal device is degraded, so as to adjust the beam management strategy according to the first information, so as to provide a reasonable beam management method and help improve the communication experience.
  • the methods provided by the embodiments of the present application are introduced from the perspective of a network device as an execution subject.
  • the network device may include hardware structures and/or software modules, and implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules. Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • the embodiment of the present application provides a communication device.
  • the communication device may be a network device, such as an access network device, and the network device may be specifically used to implement the network device in the embodiment as shown in FIG. 5 . method of execution.
  • FIG. 8 it is a schematic diagram of a communication apparatus according to an embodiment of the present application.
  • the apparatus is used to implement each step performed by the corresponding terminal device in the above method embodiments.
  • the apparatus 800 includes a processing unit 810 and a transceiver unit 820 .
  • the transceiver unit 820 is configured to receive first information sent by the terminal device, where the first information includes the location information of the terminal device and/or the movement speed information of the terminal device, and the processing unit 810 is configured to adjust the beam management strategy at least according to the first information .
  • the processing unit 810 is specifically configured to: under the condition that the first preset condition is satisfied, based on the location information, adjust the first beam in the working state of the network device to the second beam, or, Adjust the first beam pair in the working state between the network device and the terminal device to the second beam pair; the first preset condition includes at least one of the following:
  • Condition 1 According to the location information, it is determined that the current location of the terminal device changes relative to the location of the terminal device corresponding to the working beam on the network device;
  • the demodulation reference signal DMRS performance parameter of the physical uplink shared channel PUSCH or the physical uplink control channel PUCCH is less than the first threshold value
  • Condition 3 When the first information is received, the first indication information has not been sent to the terminal device, and the first indication information is used to instruct the terminal device to measure the reference signal.
  • the processing unit 810 is specifically configured to: under the condition that the second preset condition is satisfied, adjust the beam used for sending the reference signal based on the position information and the moving direction information; For tracking the working beam; the second preset condition includes at least one of the following:
  • Condition 1 According to the moving speed information, it is determined that the moving speed of the terminal device is greater than or equal to the first speed threshold;
  • Condition 2 According to the location information, it is determined that the distance between two adjacent measurement locations of the terminal device is greater than the first distance threshold.
  • the processing unit 810 is specifically configured to: under the condition that the third preset condition is satisfied, according to the moving speed information of the terminal device, lengthen the measurement period for measuring the optimal beam based on the reference signal;
  • the three preset conditions include at least one of the following:
  • the DMRS performance parameter of PUSCH or PUCCH is greater than or equal to the first threshold
  • Condition 2 According to the moving speed information, it is determined that the moving speed of the terminal device is less than the second speed threshold.
  • the processing unit 810 is specifically configured to: under the condition that the fourth preset condition is satisfied, according to the moving speed information of the terminal device, shorten the measurement period for measuring the optimal beam based on the reference signal; fourth Preset conditions include at least one of the following:
  • Condition 1 the DMRS performance parameter of PUSCH or PUCCH is less than the first threshold
  • Condition 2 According to the moving speed information, it is determined that the moving speed of the terminal device is greater than or equal to the third speed threshold.
  • the transceiver unit 820 is further configured to: send a query message to the terminal device, where the query message is used to instruct the terminal device to report the first information.
  • the above-mentioned units may also be called modules or circuits, etc., and the above-mentioned units may be provided independently, or may be fully or partially integrated.
  • the above-mentioned transceiver unit 820 may also be referred to as a communication interface, and the above-mentioned processing unit 810 may also be referred to as a processor.
  • the above communication device 800 may further include a storage unit, which is used to store data or instructions (also referred to as codes or programs), and each of the above units may interact or be coupled with the storage unit to implement corresponding methods or Features.
  • the processing unit may read data or instructions in the storage unit, so that the communication apparatus implements the methods in the above embodiments.
  • each unit in the above apparatus can be realized in the form of software calling through the processing element; also can all be realized in the form of hardware; some units can also be realized in the form of software calling through the processing element, and some units can be realized in the form of hardware.
  • each unit can be a separately established processing element, or can be integrated in a certain chip of the device to be implemented, and can also be stored in the memory in the form of a program, which can be called by a certain processing element of the device and execute the unit's processing.
  • each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in the processor element or implemented in the form of software being invoked by the processing element.
  • a unit in any of the above apparatuses may be one or more integrated circuits configured to implement the above methods, eg, one or more application specific integrated circuits (ASICs), or, one or more Multiple microprocessors (digital singnal processors, DSPs), or, one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.
  • ASICs application specific integrated circuits
  • DSPs digital singnal processors
  • FPGAs field programmable gate arrays
  • a unit in the apparatus can be implemented in the form of a processing element scheduler
  • the processing element can be a general-purpose processor, such as a central processing unit (central processing unit, CPU) or other processors that can invoke programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the apparatus in this embodiment of the present application is a network device
  • the apparatus may be as shown in FIG. 9 .
  • the apparatus 900 includes one or more radio frequency units, such as a remote radio unit (RRU) 910 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU) 920 .
  • RRU 910 may be referred to as a transceiver module, and the transceiver module may include a sending module and a receiving module, or the transceiver module may be a module capable of transmitting and receiving functions.
  • the transceiver module may correspond to the transceiver unit 420 in FIG. 4 .
  • the transceiver module may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 911 and a radio frequency unit 912 .
  • the part of the RRU 910 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending indication information to terminal equipment.
  • the part of the BBU 910 is mainly used to perform baseband processing, control the base station, and the like.
  • the RRU 910 and the BBU 920 may be physically set together or physically separated, that is, a distributed base station.
  • the BBU 920 is the control center of the base station, and can also be called a processing module, which can correspond to the processing unit 410 in FIG. 8 , and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spread spectrum.
  • the BBU processing module
  • the BBU may be used to control the base station to perform the operation procedure of the network device in the foregoing method embodiments, for example, to generate the foregoing indication information and the like.
  • the BBU 920 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as an LTE network) of a single access standard, or may respectively support a wireless access network of different access standards. Radio access network (such as LTE network, 5G network or other network).
  • the BBU 920 also includes a memory 921 and a processor 922.
  • the memory 921 is used to store necessary instructions and data.
  • the processor 922 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation flow of the network device in the foregoing method embodiments.
  • the memory 921 and processor 922 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium.
  • the computer program When the computer program is executed by a computer, the computer can implement the method performed by the network device in the foregoing method embodiments.
  • Embodiments of the present application further provide a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer can implement the method executed by the network device in the above method embodiments.
  • processors mentioned in the embodiments of the present application may be a CPU, and may also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), ready-made Field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGA Field programmable gate array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SCRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and 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 in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned computer-readable storage medium can be any available medium that can be accessed by a computer.
  • the computer-readable medium may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (electrically erasable programmable read-only memory) read only memory, EEPROM), compact disc read-only memory (CD-ROM), universal serial bus flash disk (universal serial bus flash disk), removable hard disk, or other optical disk storage, disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • RAM random access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • universal serial bus flash disk universal serial bus flash disk
  • removable hard disk or other optical disk storage
  • disk storage A medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

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Abstract

La présente invention concerne un procédé et un dispositif de gestion de faisceau. Le procédé comprend les étapes suivantes : un dispositif réseau reçoit des premières informations envoyées par un dispositif terminal, les premières informations comprenant des informations de localisation du dispositif terminal et/ou des informations de vitesse de mouvement ; le dispositif réseau ajuste une politique de gestion de faisceau d'après au moins les premières informations. Selon le procédé, après avoir reçu les premières informations, le dispositif réseau peut déterminer si la performance de communication entre le dispositif réseau et le dispositif terminal est réduite afin d'ajuster la politique de gestion de faisceau en fonction des premières informations, ce qui permet d'obtenir un mode de gestion de faisceau raisonnable et facilite l'amélioration de l'expérience de communication.
PCT/CN2021/083365 2020-06-29 2021-03-26 Procédé et dispositif de gestion de faisceau WO2022001241A1 (fr)

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