WO2021134444A1 - Procédé et appareil d'apprentissage de faisceau - Google Patents

Procédé et appareil d'apprentissage de faisceau Download PDF

Info

Publication number
WO2021134444A1
WO2021134444A1 PCT/CN2019/130426 CN2019130426W WO2021134444A1 WO 2021134444 A1 WO2021134444 A1 WO 2021134444A1 CN 2019130426 W CN2019130426 W CN 2019130426W WO 2021134444 A1 WO2021134444 A1 WO 2021134444A1
Authority
WO
WIPO (PCT)
Prior art keywords
station
signal
access point
training
participate
Prior art date
Application number
PCT/CN2019/130426
Other languages
English (en)
Chinese (zh)
Inventor
李帅
吴毅凌
李振宇
李铮
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2019/130426 priority Critical patent/WO2021134444A1/fr
Priority to CN201980102481.8A priority patent/CN114731181A/zh
Publication of WO2021134444A1 publication Critical patent/WO2021134444A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Definitions

  • This application relates to the field of communication technology, and in particular to a beam training method and device.
  • a wireless fidelity (WIFI) communication system usually includes a station (STA) and an access point (AP).
  • a site is the most basic component of a WIFI communication system, and it can be an ordinary terminal, a terminal with beamforming, or a base station/relay, etc.
  • the AP is usually a base station.
  • APs usually have beamforming capabilities. Some systems do not have beamforming capabilities. In some systems, some sites have beamforming capabilities. In some systems, all sites have beamforming capabilities. With beamforming capability. Sites that do not have beamforming capabilities use directional antennas and can only emit fixed directional beams, so they do not have beamforming capabilities.
  • APs and stations with beamforming capabilities need to determine the beams used for communication with each other, that is, beam training needs to be completed.
  • beam training needs to be completed.
  • the AP and the stations with beamforming capabilities are required to determine the beam used to send information and the beam to receive information on the local side.
  • beams can include two beam types with different widths, such as wide beams and narrow beams.
  • the number of wide beams is one.
  • the number of narrow beams is one or more, and different narrow beams point in different directions.
  • a beam training method of NR is mainly that the base station and the terminal only determine each other's wide beam during the initial access process; after the initial access is successful, the base station first determines the narrow beam used for downlink information transmission according to the configured CSI-RS resources. Beam, and then determine the narrow beam used by the terminal to receive downlink information.
  • the beam training method of the NR system is mainly applicable to the synchronization system.
  • the base station configures CSI-RS resources for the terminal, and the base station and the terminal complete beam selection with the terminal in the CSI-RS resource.
  • this beam training method is also suitable for a synchronization system and requires a specific time domain resource for beam training.
  • the AP in the WIFI system cannot configure a specific time domain resource for the site for beam selection.
  • the main purpose of this application is to provide a beam training method so that the WIFI system can better complete beam training.
  • an embodiment of the present application provides a beam training method, which includes:
  • the access point uses a wide beam to send a first signal to a station with beamforming capability, where the first signal is used for beam training by the station;
  • the access point uses the wide beam to receive a first beam training completion indication from the station, where the first beam training completion indication indicates that the station has completed beam training according to the first signal;
  • the access point respectively uses each narrow beam that needs to participate in beam training to send a second signal to the station, and uses each of the narrow beams that need to participate in beam training to receive the station pair from the station.
  • the access point determines the downlink transmission beam and the uplink reception beam after all the narrow beams that need to participate in beam training have completed transmission and reception.
  • the determination includes determining the downlink transmission beam and the uplink reception beam according to the downlink channel quality. at least one.
  • the method further includes:
  • the access point receives the second beam retraining instruction from the station, and sends a response to the station, or, after the access point determines that beam retraining needs to be performed, sends the first beam retraining to the station Instructions to instruct the station to re-execute beam training;
  • the access point After receiving the second beam training completion instruction of the station, the access point respectively uses each narrow beam that needs to participate in beam training to send a third signal to the station, and uses each of the narrow beams that need to participate in beam training. Receiving, from the station, the downlink channel quality measured by the station on the third signal in the narrow beam of the station;
  • the access point re-determines downlink transmission beams and uplink reception beams after all narrow beams that need to participate in beam training have completed transmission and reception, and the re-determination includes determining downlink transmission beams and uplink reception beams according to the downlink channel quality At least one of them.
  • the determining the uplink receiving beam according to the downlink channel quality includes:
  • the method further includes:
  • the access point determines that the station has beamforming capability.
  • the method further includes:
  • the access point receives beam information of the station during the access process of the station, where the beam information includes beamforming capability and/or the number of beams;
  • the determining by the access point that the station has beamforming capability includes: determining that the station has beamforming capability according to the beam information.
  • the embodiments of the present application provide another beam training method, which includes:
  • a station with beamforming capability uses each narrow beam that needs to participate in beam training to receive a first signal from an access point, and the first signal is used for the station to perform beam training;
  • the station separately measures the first signal received using each narrow beam that needs to participate in beam training, obtains the downlink channel quality corresponding to each narrow beam that needs to participate in beam training, and uses each of the needs to participate in the beam training.
  • the trained narrow beam feeds back the corresponding downlink channel quality to the access point;
  • the station determines a downlink receive beam and an uplink transmit beam, and the determination includes determining at least one of a downlink transmit beam and an uplink receive beam according to the downlink channel quality , And sending a first beam training completion indication to the access point;
  • the station uses the determined downlink receive beam to receive the second signal from the access point multiple times, and measures the second signal received each time, and feeds back the obtained downlink channel quality to the access point.
  • the method further includes:
  • the station reports beam information of the station during the access process, where the beam information includes beamforming capability and/or the number of beams.
  • the method further includes:
  • the station determines that the initial beam setting of the station is a wide beam
  • the station uses the wide beam to receive the first signal, and uses the wide beam to feed back the downlink channel quality of the first signal.
  • the method further includes:
  • the station receives the second beam retraining instruction from the access point, or, after the station determines that beam retraining needs to be performed, sends a first beam retraining instruction to the access point, and the first beam retraining Training is used to instruct the access point to perform beam training again and receive a response from the access point;
  • the station uses each narrow beam that needs to participate in beam training to receive a third signal from the access point, and the third signal is used for the station to perform beam training;
  • the station separately measures the third signal received using each narrow beam that needs to participate in beam training, obtains the downlink channel quality corresponding to each narrow beam that needs to participate in beam training, and uses each of the beams that needs to participate in the training.
  • the trained narrow beam feeds back the corresponding downlink channel quality to the access point respectively;
  • the station re-determines the downlink receive beam and the uplink transmit beam after all the narrow beams that need to participate in beam training have completed transmission and reception.
  • the re-determination includes determining the downlink transmit beam and the uplink receive beam according to the downlink channel quality. At least one, and sending a second beam training completion indication to the access point.
  • an embodiment of the present application provides an access point, and the access point includes a transceiver unit and a processing unit,
  • the transceiver unit is configured to use a wide beam to send a first signal to a station with beamforming capability, the first signal is used for the station to perform beam training, and the wide beam is used to receive the first beam training from the station Completion instruction, the first beam training completion instruction indicates that the station has completed beam training according to the first signal; each narrow beam that needs to participate in beam training is used to send a second signal to the station, and the station uses the Each narrow beam that needs to participate in beam training receives from the station the downlink channel quality measured by the station on the second signal;
  • the processing unit is configured to determine a downlink transmission beam and an uplink reception beam after the transceiver unit uses all narrow beams that need to participate in beam training to complete transmission and reception, and the determination includes determining the downlink transmission beam and the uplink transmission beam according to the downlink channel quality. At least one of the uplink receiving beams.
  • the transceiver unit is further configured to receive a second beam retraining instruction from the station, and send a response to the station;
  • the processing unit is further configured to send a first beam retraining instruction to the station through the transceiver unit after determining that beam retraining needs to be performed, so as to instruct the station to perform beam training again;
  • the processing unit is further configured to use each narrow beam that needs to participate in beam training to send the third signal to the station after receiving the second beam training completion instruction of the station through the transceiver unit, and use all the narrow beams to send the third signal to the station.
  • Each of the narrow beams that need to participate in beam training receives from the site the downlink channel quality measured by the site on the third signal; and is used for the transceiver unit to use all the narrow beams that need to participate in beam training to complete transmission And after receiving, re-determine the downlink transmission beam and the uplink reception beam, and the re-determination includes determining at least one of the downlink transmission beam and the uplink reception beam according to the downlink channel quality.
  • the processing unit configured to determine the uplink receiving beam according to the downlink channel quality includes: for obtaining the uplink channel quality obtained by measuring the received downlink channel quality; and determining the uplink transmission according to the uplink channel quality Beam.
  • the processing unit is further configured to determine that the station has beamforming capability before the transceiver unit uses the wide beam to send the first signal.
  • the processing unit is configured to receive beam information of the station through the transceiver unit during the access process of the station, where the beam information includes beamforming capability and/or the number of beams; and The beam information determines that the station has beamforming capability.
  • an embodiment of the present application provides a station, the station has beamforming capability, and the station includes a transceiver unit and a processing unit,
  • the transceiver unit is configured to use each narrow beam that needs to participate in beam training to receive a first signal from an access point, and the first signal is used for the station to perform beam training;
  • the processing unit is used to measure the first signal received using each narrow beam that needs to participate in beam training, to obtain the downlink channel quality corresponding to each narrow beam receiving that needs to participate in beam training, through the transceiver unit Use each of the narrow beams that need to participate in beam training to feed back the corresponding downlink channel quality to the access point; and for determining after the transceiver unit uses all the narrow beams that need to participate in beam training to complete transmission and reception A downlink receiving beam and an uplink sending beam, the determining includes determining at least one of a downlink sending beam and an uplink receiving beam according to the downlink channel quality, and sending a first beam training completion indication to the access point;
  • the transceiving unit is further configured to use the determined downlink receiving beam to receive the second signal multiple times from the access point;
  • the processing unit is further configured to measure the second signal received each time, and feed back the obtained downlink channel quality to the access point through the transceiver unit.
  • the transceiving unit is further configured to report beam information of the station during the access process, where the beam information includes beamforming capability and/or the number of beams.
  • the processing unit is further configured to determine that the initial beam setting of the station is wide before the transceiver unit uses each narrow beam that needs to participate in beam training to receive the first signal from the access point. A beam, and receiving the first signal using the wide beam by the transceiver unit, and using the wide beam to feed back the downlink channel quality of the first signal.
  • the transceiver unit is further configured to receive a second beam retraining instruction from the access point;
  • the processing unit is further configured to send a first beam retraining instruction to the access point through the transceiver unit after determining that beam retraining needs to be performed, and the first beam retraining is used to instruct the access point
  • the access point re-executes beam training, and receives the response of the access point through the transceiver unit;
  • the transceiving unit is further configured to use each narrow beam that needs to participate in beam training to receive a third signal from the access point, and the third signal is used for the station to perform beam training;
  • the processing unit is further configured to separately measure the third signal received using each narrow beam that needs to participate in beam training, to obtain the downlink channel quality corresponding to each narrow beam receiving that needs to participate in beam training.
  • the unit uses each narrow beam that needs to participate in beam training to feed back the corresponding downlink channel quality to the access point respectively; and is used to send and receive after the transceiver unit transmits and receives all the narrow beams that need to participate in beam training, Re-determining a downlink receiving beam and an uplink sending beam, the re-determining includes determining at least one of a downlink sending beam and an uplink receiving beam according to the downlink channel quality, and sending a second beam to the access point through the transceiver unit Training completion instructions.
  • the beam information is included in an association request frame or an authentication frame.
  • the beam retraining instruction is carried in a newly added field of the A-Control subfield of the HT Control field in the MAC header of the data, or carried in a reserved field in the BA control field of the block response control field.
  • the first signal, the second signal, and the third signal include NDPA and NDP.
  • the downlink channel quality is included in a CBF packet, and/or the beam training completion indication is included in a CBF packet.
  • the embodiments of the present application provide a computer-readable storage medium having instructions stored in the computer-readable storage medium, which when run on a computer, cause the computer to execute the above-mentioned first or second aspect Methods.
  • embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the method described in the first or second aspect.
  • an embodiment of the present application provides a communication device.
  • the communication device may include an entity such as an access point or a station.
  • the communication device includes: a processor and a memory; the memory is used to store instructions; By executing the instructions in the memory, the communication device executes the method according to any one of the foregoing first aspect or second aspect.
  • the present application provides a chip system including a processor for supporting communication devices to implement the functions involved in the above aspects, for example, sending or processing data and/or information involved in the above methods .
  • the chip system further includes a memory, and the memory is used to store program instructions and data necessary for the communication device.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • the present application provides a wireless communication system.
  • the system includes an access point and a station with beamforming capability.
  • the access point performs the processing of the first aspect described above, and the station with beamforming capability performs The above-mentioned second aspect of processing.
  • the beam training of the stations and access points with beamforming capability is completed, and when performing beam training, the beam training on the site side is performed first, and then the beam training on the access point side is performed, which reduces the downlink The impact of interference on the system.
  • the station reports the beam training completion indication of the station through the uplink CBF packet, etc., which improves the robustness of the station in the downlink interference scenario.
  • the station can report beam information during processes such as the access process, and the access point determines whether the station needs to perform beam training based on the beam information reported by the station. For stations without beamforming capabilities, beam training may not be performed. The beam training is performed only on the AP side, thereby reducing the time for beam training.
  • the beam retraining scheme provided in the foregoing embodiment implements the AP and site side trigger beam retraining mechanism, and improves the completeness of beam training and the robustness of beam transmission.
  • Figure 1 is a flowchart of a method according to an embodiment of the application
  • Figure 2 is a schematic diagram of the overall flow of an embodiment of the application
  • Figure 3 is a schematic diagram of an access process in an embodiment of the application.
  • FIG. 4 is a schematic diagram of using a data frame to perform beam retraining instructions in an embodiment of the application
  • FIG. 5 is a schematic diagram of using block Ack (BA) to perform beam retraining instructions in an embodiment of the application;
  • BA block Ack
  • FIG. 6 is a schematic structural diagram of an access point according to an embodiment of the application.
  • Fig. 7 is a schematic structural diagram of a site according to an embodiment of the application.
  • the beam training method of the NR system is to first determine the narrow beam used for downlink information transmission on the base station side, and then determine the narrow beam used for downlink information reception on the terminal side.
  • the beam training method mainly includes the following steps:
  • Step A Initially select beams and discover potential beams through the P-1 process.
  • the P1 process is mainly periodic scanning, and the scanned beams are relatively wide, including the synchronization signal block (SSB) on the base station side to send a wide beam and the terminal side to receive a wide beam.
  • SSB synchronization signal block
  • Step B the base station configures the terminal with a set of channel state information reference signal (channel state information reference signal, CSI-RS) first resources, and repeats radio resource control (radio resource control, RRC) high-level parameters (repetition) is set to off, the base station uses different beams for the group of CSI-RS in the first resource to transmit, for example, it uses beam polling to transmit; the terminal uses the same beam to receive the base station using different transmit beams to transmit CSI-RS, and report the measurement result to the base station.
  • the base station determines the narrow beam used for downlink information transmission according to the measurement result.
  • Step C the base station configures the second resource of the group of CSI-RS for the terminal, sets the RRC high-level parameter repetition to on, and the base station uses P-2 for the group of CSI-RS in the second resource.
  • the narrow beam determined by the process is sent; accordingly, the terminal receives the group of CSI-RS in a beam polling manner, and the terminal determines the narrow beam used for receiving downlink information according to the measurement result.
  • This method does not consider the problem of interference between the base station and the terminal.
  • the AP side beam training is performed first, when the AP sends a beam training handover instruction to the station, it is likely that the station uses a beam that is affected by interference, and the handover indication sent by the AP fails to be transmitted. The possibility is higher.
  • the station will only perform beam training when it receives a handover instruction. Therefore, the AP needs to re-send the handover instruction to the station after determining that the station has not received the handover instruction. Accordingly, the station performs beam training after receiving the handover instruction, which results in a longer time for beam training to be completed.
  • the beam training method of the NR system instructs the base station to perform beam training by setting the RRC high-level parameter repetition to off, and sets the parameter repetition to on to instruct the terminal to perform beam training.
  • RRC high-level parameter repetition there is no such RRC high-level parameter repetition in the WIFI system, so a similar configuration method cannot be used to indicate which device performs beam training.
  • the WIFI system cannot use the beam training method of the NR system.
  • the embodiments of the present application can be used in a WIFI communication system including APs and stations with beamforming capabilities. Of course, they can also be applied to other wireless communication systems that require beam training for devices in the system, such as LTE systems and NR systems. And other wireless communication systems in the future.
  • the embodiments of the present application mainly take a WIFI communication system as an example. This type of WIFI communication system can provide scenarios such as site backhaul and video backhaul.
  • APs and stations with beamforming capabilities can transmit signals in one or more specific beam directions, and can receive signals in one or more specific beam directions.
  • the site can be a terminal device with beamforming capability, or it can be a base station/relay, etc.
  • the AP is usually a base station.
  • the site corresponds to the terminal equipment of LTE and NR systems, and the AP corresponds to the base station of LTE and NR systems.
  • the wide beam and the narrow beam in the embodiment of the present application are related to the horizontal 3dB beam width of the beam.
  • the horizontal 3dB beam width of the wide beam is relatively wide, such as 45 to 120 degrees, and the general function of the wide beam is to provide wide coverage of broadcast signals.
  • the horizontal 3dB beam width of the narrow beam is narrow, such as 5 to 45 degrees, and can also be set to be narrower, such as 10 to 20 degrees.
  • the narrow beam has higher beam gain and better side-lobe interference suppression capability, but the coverage width is narrower, and it is generally used for point-to-point communication.
  • Narrow beams generally need to be determined through beam scanning and beam selection processes.
  • an embodiment of the application for beam training for the AP and the station includes the following steps:
  • Step 101 The AP uses a wide beam to send a first signal to the station.
  • the first signal may include a null data packet announcement (NDPA) and/or a null data packet (NDP).
  • NDPA null data packet announcement
  • NDP null data packet
  • the sounding mechanisms supported by the WIFI system include single-user measurement (SU sounding) and multi-user measurement (MU sounding).
  • the beamforming sender Beamformer
  • NDPA is an NDP measurement notification frame, indicating the user to be measured and the configuration of the measurement, including the measurement mode, bandwidth, number of streams, etc.
  • Sounding NDP is a special single-user physical protocol data unit (single-user physical protocol data unit). data Unit, SU PPDU), which only carries the pilot and has no data part, and is used to perform NDP measurement for the receiver.
  • Beamformee After Beamformee receives the measurement frame sequence sent by Beamformer, it parses the NDP Announcement to obtain the measurement configuration, parses the Sounding NDP for channel measurement, and composes the measurement result into a compressed beamforming/channel quality indicator report (compressed beamforming/channel quality indicator report). , Compressed beamforming/CQI report)
  • the frame format of the frame is fed back to Beamformer.
  • Beamformer sends NDPA, sounding NDP, and beamforming report poll (BFRP) Trigger Frame to multiple Beamformees. Because MU sounding involves multiple Beamformees, the BFRP Trigger is used to allocate uplink transmission resources for the multiple Beamformees, including information such as the bandwidth and the number of streams where the transmission is located.
  • BFRP beamforming report poll
  • Beamformer needs to send NDPA and NDP to Beamformee. That is, the AP needs to send NDPA and NDP to the station. Therefore, NDPA and NDP can be used as the first signal for beam training.
  • Step 102 The station uses each narrow beam that needs to participate in beam training to receive the first signal.
  • the access point In order to complete the beam training on the site side, the access point will repeatedly send the first signal multiple times until it receives a beam training completion indication fed back by the site.
  • the access point can determine that the station completes the beam training according to the beam training completion instruction.
  • the beam training does not have to be completed within a specific time resource, so the beam training method is more flexible.
  • the narrow beams that need to participate in beam training can be all or part of the narrow beams of the site.
  • the site can also divide the narrow beams into multiple groups, and perform beam training on the multiple groups of narrow beams.
  • Each group of narrow beams is the narrow beam that currently needs to participate in beam training. After the training of each group of narrow beams is completed, the narrow beams used for uplink/downlink are further determined from the narrow beams selected from each group.
  • the station using a narrow beam to receive the first signal may specifically be in a narrow beam polling manner, of course, other methods may also be used.
  • the polling may specifically include: for each narrow beam that needs to participate in beam training, the station obtains the downlink channel quality based on the signal measurement of the first signal, and feeds back the downlink channel quality to the narrow beam through the same beam as the narrow beam. AP.
  • a compressed beamforming (compressed beamforming, CBF) packet can be formed according to the downlink channel quality, and the CBF packet can be fed back to the narrow beam through the same beam as the narrow beam.
  • CBF compressed beamforming
  • the AP uses a wide beam to receive the downlink channel quality feedback of the first signal received by each narrow beam that needs to participate in beam training. Specifically, it can receive each CBF packet.
  • Step 103 After the polling ends, the station determines the downlink receiving beam I and/or using the downlink channel quality obtained by measuring the first signal received by each narrow beam that needs to participate in beam training. In the uplink sending beam J for sending information, it sends a beam training completion indication to the AP.
  • the measurement result may include signal quality and/or signal strength.
  • the downlink receiving beam I may be determined according to the signal quality
  • the uplink transmitting beam J may be determined according to the signal strength.
  • the sending beam of the sending instruction may be the last beam M of the polling, or it may be the determined uplink sending beam J.
  • the beam can be directly used as the beam in the other direction.
  • the uplink transmitting beam is also determined as the beam I.
  • the site can specifically indicate the completion of beam training through CBF. Specifically, it may use a reserved field of 1 bit of the multiple input multiple output control field (multiple input multiple output control field, MIMO control field) of the Compressed Beamforming/CQI frame format to indicate that the beam training is completed. As shown in Table 3, B37-39 and B48-55 in the MIMO control field are reserved fields. This application can use the 1-bit reserved field, for example, use 1-bit B39, as shown in Table 4.
  • Step 104 The AP uses a wide beam to receive a beam training completion indication, and after receiving the indication, sends a second signal to the station in a narrow beam polling manner.
  • the second signal is similar to the first signal, and may include NDPA and/or NDP.
  • the second signal can be the same as or different from the first signal.
  • This application also takes the second signal including NDPA and NDP as an example.
  • the beam training on the AP side can also be for part of the narrow beams, that is, the narrow beams that need to participate in the beam training are only part of the narrow beams on the AP side.
  • the AP can also divide the narrow beams that need to participate in beam training into multiple groups, and perform beam training on the multiple groups of narrow beams. After each group of narrow beams has completed training, it can further determine the uplink/downlink from the narrow beams selected in each group. Narrow beam.
  • Step 105 The station uses the downlink receiving beam I determined in step 103 to receive.
  • Step 106 The station obtains downlink channel quality based on signal measurement on the second signal, and feeds back the downlink channel quality to the AP through the uplink transmission beam J determined in step 103.
  • the station can specifically compose a CBF packet according to the downlink channel quality, and feed the CBF packet back to the AP through the uplink transmission beam J.
  • Step 107 The AP receives the downlink channel quality by using the same receiving beam as the sending beam for sending the second signal.
  • the downlink channel can be carried in a CBF packet here.
  • the AP can obtain the downlink channel quality carried in the CBF packet, and/or measure the CBF packet to obtain the uplink channel quality.
  • Step 108 After the polling ends, the AP determines the downlink transmission beam V and the uplink reception beam U. The determination includes determining the downlink transmission beam V and/or determining the uplink reception beam U according to the downlink channel quality.
  • the uplink transmission beam needs to be determined according to the downlink channel quality
  • the downlink channel quality needs to be measured to obtain the uplink channel quality, and then the uplink transmission beam is determined according to the uplink channel quality.
  • the AP side can also determine the sending beam or the receiving beam only according to the downlink channel quality. For example, if the downlink transmission beam V is determined only according to the downlink channel quality carried in the CBF packet, the uplink reception beam is also directly set as the beam V. vice versa.
  • both the site and the AP have completed beam training and determined their respective transmitting beams and receiving beams.
  • the schematic diagram of the foregoing implementation is shown in FIG. 2.
  • the AP can determine whether the site has beamforming capability, if so, then perform step 101, if not, the AP directly performs beam training on its own side, and the site side also follows the normal signal receiving process The processing is sufficient, so that the overhead of beam training can be reduced.
  • the AP can specifically determine whether the site has beamforming capability through the beam information reported by the site.
  • the beam information may specifically include beamforming capability and/or the number of beams. If it is the number of beams, and the number is greater than 1, it can be confirmed that the site has beamforming capability.
  • the site can report the beam information of the site during the access process.
  • the beam information may be carried in an association request frame (association request frame), or the beam information may be carried in an authentication frame (authentication frame).
  • association request frame association request frame
  • authentication frame authentication frame
  • the access process is shown in Figure 3.
  • the access process includes the following steps:
  • Step a) AP sends a beacon frame to the station (STA);
  • Step b) The STA sends an Authentication Frame authentication request to the AP, and the AP responds with an ACK;
  • Step c) AP sends Authentication Frame authentication feedback to STA, and STA responds with ACK;
  • Step d) The STA sends an Association Request Frame association request to the AP.
  • the AP judges whether the STA has beamforming capability according to the beam information carried by the STA in step b) or step d, and executes different beam training strategies in the subsequent beam training process. For example, for STAs with beamforming capabilities, first perform STA beam training and then AP beam training; for STAs without beamforming capabilities, perform AP beam training directly.
  • a 1-bit field may be used to indicate the beamforming capability, for example, as shown in Table 1 below, the B0 field is used. It is also possible to use a field of 6 bits or more to indicate the number of beams. For example, as shown in Table 2 below, use B0-B5. Of course, the beamforming capability and the number of beams can also be carried at the same time. The method is similar, and it can be represented by a field of 7 bits or more, such as B0-B6.
  • the station before performing step 102, can judge whether it has beamforming capability by itself. Only stations with the beamforming capability perform step 102. For example, if the initial beam setting of the site is a directional beam, the directional beam can only be used, it does not have beamforming capability and does not require beam training, so the site does not perform steps 102 and 103.
  • the AP will directly perform beam training on its own side, and accordingly, the site will use the directional beam for uplink feedback.
  • the station can replace steps 102 and 103 with: use the directional beam to receive NDPA and NDP once, and send the corresponding CBF, and send the training completion instruction.
  • the training completion indication can be carried in the CBF.
  • the AP performs beam training on the AP side after receiving the beam training completion indication.
  • the initial setting of the beam can be a wide beam or a narrow beam.
  • the station may perform different processing according to the initial setting of the beam.
  • the processing of the station in step 102 may specifically include the following steps:
  • Step I After receiving the NDPA and NDP using the wide beam, the station uses the wide beam to send the CBF, that is, the first beam training is completed, and the training completion indication is not sent.
  • Step II After the first beam training, the site switches to a narrow beam to perform narrow beam polling.
  • step 103 is executed, that is, after the polling ends, the sending and receiving beams are determined, and the training completion indication is sent.
  • the narrow beam polling in step 102 is directly performed.
  • the beam of the station is determined preferentially, which reduces the influence of downlink interference on the system.
  • the embodiment of the present application further reports the beam training completion instruction of the site through the uplink CBF packet, etc., which improves the robustness of the site in the downlink interference scenario.
  • the station can report beam information during processes such as the access process, and the AP determines whether the station needs to perform beam training based on the beam information reported by the station. For stations without beamforming capabilities, beam training may not be performed. The AP side performs beam training, thereby reducing the time for beam training.
  • some reasons may trigger beam training again. These reasons may include: the station detects that the received signal quality of the local side is poor, or the AP detects that the downlink data transmission packet error rate is high.
  • the station needs to send a beam retraining instruction to the AP; similarly, if the AP initiates beam retraining, the AP needs to send a beam retraining instruction to the station.
  • it can be specifically indicated by a data frame, and a schematic diagram of the indication is shown in FIG. 4. It can also be indicated by BA. The schematic diagram of the indication is shown in Figure 5.
  • the high throughput control field (HT Control field) in the media access control (MAC) header of the uplink and downlink data contains the A-Control subfield, and the beam retraining instruction can use this subfield.
  • 1bit is used to carry the beam retraining instruction, for example, B0 is used to carry the beam retraining instruction.
  • BA control field There are 7-bit reserved fields in the block response control field (BA control field), namely B5-B11, and 1 bit in the reserved field can be used to carry the beam retraining instruction.
  • B11 can be used to carry the beam retraining indication.
  • the AP After determining that beam retraining is required, the AP will send a signal for measurement, such as the third signal, to the station.
  • the third signal is similar to the previous first signal and second signal, and can also be directly the first signal and/or the second signal.
  • the subsequent beam retraining process is similar to the aforementioned beam training process, and will not be repeated here.
  • the above beam retraining scheme implements the AP and site side trigger beam retraining mechanism, which improves the completeness of beam training and the robustness of beam transmission.
  • the structure of the access point in the embodiment of the present application is shown in FIG. 6, and includes a transceiver unit 601 and a processing unit 602.
  • the transceiver unit 601 is configured to use a wide beam to send a first signal to a station capable of beamforming, the first signal is used for the station to perform beam training, and the wide beam is used to receive the first beam from the station.
  • Training completion instruction indicates that the station has completed beam training according to the first signal; each narrow beam that needs to participate in beam training is used to send a second signal to the station, and the station is used A narrow beam that needs to participate in beam training receives from the station the downlink channel quality measured by the station on the second signal.
  • the processing unit 602 is configured to determine a downlink transmission beam and an uplink reception beam after the transceiver unit uses all narrow beams that need to participate in beam training to complete transmission and reception, and the determination includes determining the downlink transmission beam according to the downlink channel quality And at least one of the uplink receiving beams.
  • the processing related to sending and receiving of the access point may be executed by the foregoing transceiver unit 601, and other processing may be executed by the processing unit 602.
  • the setting of each information can also refer to the method embodiment. I won't repeat it here.
  • the structure of the site in the embodiment of the present application is shown in FIG. 7.
  • the station includes a transceiver unit 701 and a processing unit 702.
  • the transceiver unit 701 is configured to use each narrow beam that needs to participate in beam training to receive a first signal from an access point, and the first signal is used for the station to perform beam training;
  • the processing unit 702 is configured to measure the first signal received using each narrow beam that needs to participate in beam training, and obtain the downlink channel quality corresponding to each narrow beam that needs to participate in beam training.
  • the unit uses each of the narrow beams that need to participate in beam training to feed back the corresponding downlink channel quality to the access point; and is used to send and receive after the transceiver unit uses all the narrow beams that need to participate in beam training to complete transmission and reception, Determining a downlink receiving beam and an uplink sending beam, the determining includes determining at least one of a downlink sending beam and an uplink receiving beam according to the downlink channel quality, and sending a first beam training completion indication to the access point;
  • the transceiving unit 701 is further configured to use the determined downlink receiving beam to receive the second signal multiple times from the access point;
  • the processing unit 702 is further configured to measure the second signal received each time, and feed the obtained downlink channel quality back to the access point through the transceiver unit 701.
  • the processing related to sending and receiving of the site may be executed by the foregoing transceiver unit 701, and other processing may be executed by the processing unit 702.
  • the setting of each information can also refer to the method embodiment. I won't repeat it here.
  • the transceiver units of the aforementioned access points and stations may specifically be transceivers, and the processing units may be processors.
  • the foregoing transceiver unit and processing unit may be provided in a chip, that is, the chip implements each processing step of the foregoing method embodiment.
  • the foregoing processor may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs used to control the execution of the wireless communication method of the first aspect. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the access point and the station may further include a storage unit, specifically a memory, for storing computer executable program code.
  • the program code includes instructions. When the instructions are executed, the processor executes the processing steps in the foregoing method embodiments.
  • embodiments of the present application also provide a computer storage medium, where the computer storage medium stores a program, and the program executes some or all of the processing steps related to the access point recorded in the foregoing method embodiments.
  • an embodiment of the present application also provides another computer storage medium, where the computer storage medium stores a program, and the program executes some or all of the processing steps related to the site recorded in the above method embodiments.
  • the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physically separate.
  • the physical unit can be located in one place or distributed across multiple network units. Some or all of the modules can be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the connection relationship between the modules indicates that they have a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines.
  • this application can be implemented by means of software plus necessary general hardware.
  • it can also be implemented by dedicated hardware including dedicated integrated circuits, dedicated CPUs, dedicated memory, Dedicated components and so on to achieve.
  • all functions completed by computer programs can be easily implemented with corresponding hardware.
  • the specific hardware structures used to achieve the same function can also be diverse, such as analog circuits, digital circuits or special-purpose circuits. Circuit etc.
  • software program implementation is a better implementation in more cases.
  • the technical solution of this application essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a computer floppy disk.
  • a readable storage medium such as a computer floppy disk.
  • U disk mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc., including several instructions to make a computer device (which can be A personal computer, a server, or a network device, etc.) execute the method described in each embodiment of the present application.

Landscapes

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

Abstract

La présente invention concerne, selon certains modes de réalisation, un procédé d'apprentissage de faisceau. Un point d'accès utilise un faisceau large pour envoyer un premier signal à une station apte à la mise en forme de faisceau, le premier signal étant utilisé pour que la station effectue un apprentissage de faisceau ; le point d'accès utilise le faisceau large pour recevoir une première indication d'achèvement d'apprentissage de faisceau en provenance de la station, la première indication d'achèvement d'apprentissage de faisceau indiquant que la station a achevé l'apprentissage de faisceau selon le premier signal ; le point d'accès envoie un second signal à la station en utilisant respectivement chaque faisceau étroit qui doit participer à l'apprentissage de faisceau, et reçoit, en provenance de la station en utilisant chaque faisceau étroit qui doit participer à l'apprentissage de faisceau, la qualité de canal de liaison descendante obtenue par une mesure effectuée sur le second signal par la station ; et le point d'accès détermine un faisceau d'émission de liaison descendante et un faisceau de réception de liaison montante après que tous les faisceaux étroits qui doivent participer à l'apprentissage de faisceau ont achevé l'émission et la réception, la détermination comportant la détermination d'au moins un faisceau parmi le faisceau d'émission de liaison descendante et le faisceau de réception de liaison montante selon la qualité de canal de liaison descendante.
PCT/CN2019/130426 2019-12-31 2019-12-31 Procédé et appareil d'apprentissage de faisceau WO2021134444A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2019/130426 WO2021134444A1 (fr) 2019-12-31 2019-12-31 Procédé et appareil d'apprentissage de faisceau
CN201980102481.8A CN114731181A (zh) 2019-12-31 2019-12-31 一种波束训练方法及装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/130426 WO2021134444A1 (fr) 2019-12-31 2019-12-31 Procédé et appareil d'apprentissage de faisceau

Publications (1)

Publication Number Publication Date
WO2021134444A1 true WO2021134444A1 (fr) 2021-07-08

Family

ID=76687184

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/130426 WO2021134444A1 (fr) 2019-12-31 2019-12-31 Procédé et appareil d'apprentissage de faisceau

Country Status (2)

Country Link
CN (1) CN114731181A (fr)
WO (1) WO2021134444A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017032230A1 (fr) * 2015-08-27 2017-03-02 中兴通讯股份有限公司 Procédé, système et appareil de mise en œuvre de synchronisation haute fréquence en fonction d'un accès à des faisceaux large et étroit
CN107682065A (zh) * 2016-08-02 2018-02-09 华为技术有限公司 一种传输数据的方法和装置
CN108242948A (zh) * 2016-12-23 2018-07-03 维沃移动通信有限公司 一种波束训练方法、网络设备及终端
CN108242949A (zh) * 2016-12-27 2018-07-03 中国电信股份有限公司 基站和终端及其组成的多用户传输系统和多用户传输方法
CN108418618A (zh) * 2017-02-10 2018-08-17 华为技术有限公司 波束处理方法、发起节点及响应节点

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017032230A1 (fr) * 2015-08-27 2017-03-02 中兴通讯股份有限公司 Procédé, système et appareil de mise en œuvre de synchronisation haute fréquence en fonction d'un accès à des faisceaux large et étroit
CN107682065A (zh) * 2016-08-02 2018-02-09 华为技术有限公司 一种传输数据的方法和装置
CN108242948A (zh) * 2016-12-23 2018-07-03 维沃移动通信有限公司 一种波束训练方法、网络设备及终端
CN108242949A (zh) * 2016-12-27 2018-07-03 中国电信股份有限公司 基站和终端及其组成的多用户传输系统和多用户传输方法
CN108418618A (zh) * 2017-02-10 2018-08-17 华为技术有限公司 波束处理方法、发起节点及响应节点

Also Published As

Publication number Publication date
CN114731181A (zh) 2022-07-08

Similar Documents

Publication Publication Date Title
CN110870218B (zh) 毫米波系统中的多信道多输入多输出波束成形训练
US9258824B2 (en) Method of reducing interference between stations in wireless LAN system, and apparatus supporting the same
TWI433393B (zh) 於無線通信中天線選擇的方法及裝置
US9271176B2 (en) System and method for backhaul based sounding feedback
CN108988925B (zh) 无线网络中天线极化方向的指示方法和装置
CN111586858A (zh) 信号传输方法和通信装置
US11019615B2 (en) Data transmission method and related apparatus
CN113037400A (zh) 信道探测方法及装置
CN110740457A (zh) 信息传输方法、发起节点及响应节点
CN110912594B (zh) 波束训练方法及装置
WO2018081926A1 (fr) Procédé de formation de faisceau, dispositif d'initiation, et dispositif de réponse
JP2009509410A (ja) スマートアンテナを有する無線通信システムにおいてデータを送受信する方法および装置
WO2021081770A1 (fr) Procédé et appareil de mesure
US20220294493A1 (en) Spatial reuse for hidden node scenario
WO2023042621A1 (fr) Dispositif de points d'accès (ap), procédé et système de communication et programme
WO2021134444A1 (fr) Procédé et appareil d'apprentissage de faisceau
US20210204267A1 (en) Communication method and related apparatus
US20220346067A1 (en) Communication device and communication method
JP2018113674A (ja) 無線通信装置及び無線通信方法
WO2020125635A1 (fr) Procédé et appareil de communication
US20220038140A1 (en) Cooperative beamforming in wireless network
US20220014237A1 (en) Cooperative beamforming in wireless network
WO2018072210A1 (fr) Procédé d'apprentissage de faisceau, appareil, et dispositif sans fil
US20230299816A1 (en) Multi-Antenna Wireless Transmitter and Method with MIMO Beamforming
WO2023179587A1 (fr) Procédé et appareil de rétroaction et de détermination de livre de codes pour une pluralité de points émetteurs/récepteurs (trp)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19958561

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19958561

Country of ref document: EP

Kind code of ref document: A1