WO2022011505A1 - Procédé, appareil et dispositif de gestion de faisceau, et support de stockage - Google Patents

Procédé, appareil et dispositif de gestion de faisceau, et support de stockage Download PDF

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Publication number
WO2022011505A1
WO2022011505A1 PCT/CN2020/101656 CN2020101656W WO2022011505A1 WO 2022011505 A1 WO2022011505 A1 WO 2022011505A1 CN 2020101656 W CN2020101656 W CN 2020101656W WO 2022011505 A1 WO2022011505 A1 WO 2022011505A1
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WIPO (PCT)
Prior art keywords
terminal
network device
information
ssb
uplink
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PCT/CN2020/101656
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English (en)
Chinese (zh)
Inventor
林雪
石聪
李海涛
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Oppo广东移动通信有限公司
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Priority to CN202080101128.0A priority Critical patent/CN115669038A/zh
Priority to PCT/CN2020/101656 priority patent/WO2022011505A1/fr
Publication of WO2022011505A1 publication Critical patent/WO2022011505A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the field of communications technologies, and in particular, to a beam management method, apparatus, device, and storage medium.
  • the terminal can be in different states according to different business activities to reduce the power consumption of the terminal.
  • Three RRC (Radio Resource Control, radio resource control) states are defined in the NR (New radio, new air interface) system: RRC_IDLE (RRC idle state), RRC_CONNECTED (RRC connected state) and RRC_INACTIVE (RRC inactive state).
  • the network device sends the measurement configuration information of the beam to the terminal, the terminal measures the channel state according to the measurement configuration information, and reports the CSI (Channel-Sate Information, channel state information) to the network device. This determines whether the beam direction needs to be adjusted so that the network device can better receive the uplink data.
  • CSI Channel-Sate Information, channel state information
  • the network device When the terminal is in the RRC inactive state, CSI reporting is not performed, and the network device does not know whether the beam direction of the current terminal during data transmission has changed, or whether the downlink beam direction is still a good beam direction for the current terminal. Therefore, for the IDT (RRC_INACTIVE Data Transmission) process, it is urgent to design a beam management method to ensure the communication quality between the terminal and the network device.
  • Embodiments of the present application provide a beam management method, apparatus, device, and storage medium, so that a terminal can report beam adjustment information to a network device in an inactive state, so that the network device can adjust the downlink transmit beam and the uplink receive beam in time.
  • the technical solution is as follows:
  • a beam management method applied in a terminal, and the method includes:
  • the synchronization signal block SSB is measured in the inactive state
  • the first beam information is information used to instruct the network device to adjust the downlink transmit beam and the uplink receive beam;
  • the first beam information is reported to the network device by using the uplink resources used for the inactive data transmission IDT.
  • a beam management method which is applied to a network device, and the method includes:
  • the terminal Receive the first beam information reported by the terminal, where the first beam information is reported through the uplink resources used for inactive data transmission IDT, and the first beam information is the synchronization signal block SSB that the terminal performs according to the measurement configuration determined by measurements.
  • a beam management apparatus comprising:
  • a measurement module configured to measure the synchronization signal block SSB in an inactive state according to the measurement configuration
  • a determination module configured to determine first beam information according to the measurement result, where the first beam information is information used to instruct the network device to adjust the downlink transmission beam and the uplink reception beam;
  • the sending module is used for the terminal to report the first beam information to the network device by using the uplink resources used for the inactive data transmission IDT.
  • a beam management apparatus comprising:
  • a receiving module configured to receive the first beam information reported by the terminal, where the first beam information is reported through the uplink resources used for inactive data transmission IDT, and the first beam information is the terminal according to the measurement configuration, Determined by measuring the synchronization signal block SSB.
  • a terminal in another aspect, includes a processor and a memory, the memory stores at least one instruction, and the at least one instruction is configured to be executed by the processor to implement any of the above aspects executed by the terminal. a described method.
  • a network device comprising a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the above aspect by the network device Perform any of the described methods.
  • a computer-readable storage medium is provided, and instructions are stored on the computer-readable storage medium, and when the instructions are executed by a processor, the above-mentioned method for executing by a terminal is implemented.
  • a computer-readable storage medium is provided, and instructions are stored on the computer-readable storage medium, and when the instructions are executed by a processor, the above-mentioned method implemented by a network device is implemented.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method performed by the terminal as described in the above aspects.
  • a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method performed by a network device as described in the above aspects.
  • the terminal measures the synchronization signal block SSB in the inactive state according to the measurement configuration; determines the first beam information according to the measurement result, where the first beam information is used to instruct the network device to adjust the downlink transmission beam and the uplink reception beam;
  • the first beam information is reported to the network device in the uplink resource of the inactive data transmission IDT.
  • the terminal informs the network device whether the beam direction of the terminal changes during data transmission through the reported first beam information, and the network device adjusts the downlink transmit beam and uplink receive beam when communicating with the terminal according to the first beam information. That is, the present application can notify the network device to adjust the beam in time when the transmission beam of the terminal changes, which ensures the communication quality between the network device and the terminal in the inactive state.
  • FIG. 1 is a block diagram of a 5G communication system provided by an exemplary embodiment of the present application
  • FIG. 2 is a flowchart of a beam management method provided by an exemplary embodiment of the present application
  • FIG. 3 is a flowchart of a beam management method based on a four-step random access procedure provided by an exemplary embodiment of the present application
  • FIG. 4 is a flowchart of a beam management method based on a two-step random access process provided by an exemplary embodiment of the present application
  • FIG. 5 is a flowchart of a method for beam management based on CG resources provided by an exemplary embodiment of the present application
  • FIG. 6 is a schematic structural diagram of a beam management apparatus provided by an exemplary embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a beam management apparatus provided by another exemplary embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.
  • Step 1 The terminal sends Msg1 to the network device, the Msg1 is a random access preamble sequence (ie preamble), also called PRACH (Physical Random-Access Channel, physical random access channel).
  • Msg1 is a random access preamble sequence (ie preamble), also called PRACH (Physical Random-Access Channel, physical random access channel).
  • PRACH Physical Random-Access Channel, physical random access channel
  • the terminal sends Msg1 to the network device to notify the network device that there is a random access request, and at the same time enables the network device to estimate the transmission delay between itself and the terminal, and calibrate the uplink time accordingly.
  • the information of the resource for sending Msg1 may be obtained through the resource configuration of RACH (Random Access Channel, random access channel).
  • RACH resource configuration information configured for terminal access is defined, including 256 types, and a cell can indicate the RACH resource configuration information used by itself to the terminal in a system message.
  • Each RACH resource configuration information includes preamble format, period, radio frame offset, subframe number in radio frame, start symbol in subframe, number of PRACH time slots in subframe, PRACH timing in PRACH time slot The number of , and the duration of the PRACH opportunity.
  • the time, frequency, and code information of the PRACH resource can be determined through these information.
  • the terminal can send Msg1 on the corresponding PRACH resource according to the RACH resource configuration information indicated by the network device.
  • Step 2 After detecting the Msg1 sent by the terminal, the network device sends an RAR (Msg2) to the terminal to inform the terminal of uplink resource information that can be used when sending the next message (Msg3).
  • Msg2 an RAR
  • Msg3 uplink resource information that can be used when sending the next message
  • one RAR may include response messages to multiple terminals sending preambles, and the response message to each terminal includes the random access preamble identification field RAP ID used by each terminal, the resource allocation information of Msg3, TA (Tracking Area, tracking area) information, etc.
  • the network device can also perform other operations, such as assigning a temporary RNTI (Radio Network Temporary Identity, wireless network temporary identity) to the terminal, etc., which will not be introduced here.
  • RNTI Radio Network Temporary Identity, wireless network temporary identity
  • Step 3 The terminal receives the RAR, and sends Msg3 to the network device on the uplink resource indicated by the RAR.
  • the terminal may monitor a PDCCH (Physical Downlink Control Channel, physical downlink control channel) in a search space within a RAR time window corresponding to the RAR to receive the RAR.
  • the RAR time window may be configured through high-layer parameters, and the configuration information of the search space of the PDCCH may be indicated through a system message.
  • the terminal does not receive the RAR sent by the network device within the RAR time window, it is considered that the random access procedure has failed. If the terminal receives a RAR, and the preamble index in the RAR is the same as the preamble index sent by the terminal, it is considered that the RAR has been successfully received. At this time, the terminal can stop monitoring the RAR, and the terminal sends Msg3 to the network device.
  • the Msg3 may carry a terminal-specific temporary identity information or a terminal identity from the core network.
  • the terminal identity may be S-TMSI (Serving-Temporary Mobile Subscriber Identity, temporary mobile subscriber identity) or a random number.
  • Step 4 After receiving the Msg3, the network device sends the Msg4 to the terminal.
  • the Msg4 includes a contention resolution message and also includes information about uplink transmission resources allocated for the terminal.
  • the network device will carry a unique flag in the Msg4 to indicate the terminal that wins the competition.
  • the terminal receives the Msg4 sent by the base station, it will detect whether the temporary identification information sent by the terminal in Msg3 is included in the contention resolution message sent by the network device. The random access procedure is initiated again from the first step.
  • two-step random access is proposed, and two-step random access consists of two-step messages.
  • Step 1 The terminal sends the MsgA to the network device.
  • the MsgA consists of a preamble and a PUSCH (Physical Uplink Shared Channel, physical uplink shared channel), which are sent by TDM (Time Division Multiplexing, time division multiplexing).
  • PUSCH Physical Uplink Shared Channel, physical uplink shared channel
  • the PUSCH in the MsgA is similar to the Msg3 in the four-step random access, which carries specific terminal identity information to facilitate the network device to identify the terminal identity.
  • Step 2 The network device feeds back MsgB to the terminal.
  • the MsgB is similar to the RAR message and the Msg4 message in the four-step random access, and includes at least TA (Tracking Area, tracking area) information and a contention resolution message.
  • TA Track Area, tracking area
  • Dynamic resource scheduling means that the network device sends an uplink scheduling grant (UL grant) to the terminal device, and the UL grant includes the time-frequency domain resources occupied by the scheduled uplink data channel.
  • the terminal device will send uplink data on the indicated time-frequency resources according to the instruction of the UL grant.
  • Semi-static resource scheduling means that the network device sends semi-static configuration signaling to the terminal device, and the semi-static configuration signaling includes the time-frequency domain resources occupied by the scheduled uplink data channel.
  • Semi-static resource scheduling is divided into two types in the NR standard. Type 1 is that the network device semi-statically configures a periodic uplink data channel for the terminal device at the radio resource control layer to transmit data. Type 2 is that the network device semi-statically configures periodic uplink data channels for terminal devices at the radio resource control layer to transmit data, but needs to activate downlink control information from the physical layer.
  • the semi-static configuration signaling is also used to indicate that the uplink data adopts the repeated transmission mode. In one cycle, the terminal device can repeatedly send the same data transmission block on the configured uplink data channel.
  • the network device can pre-configure the resources required for the terminal device to transmit data in the uplink through RRC (Radio Resource Control, Radio Resource Control) signaling, using semi-static resource allocation, that is, pre-configured transmission resources, such as CG (Configured Grant, configuration authorization) resource.
  • RRC Radio Resource Control, Radio Resource Control
  • CG Configured Grant, configuration authorization
  • Beam management is for data communication in high-frequency scenarios. Beam management establishes and maintains a suitable beam pair, selects a suitable receive beam at the receiver, and selects a suitable transmit beam at the transmitter. A good wireless connection.
  • the above-mentioned transmitters and receivers may be network devices or terminals.
  • an optimal beam pair for downlink transmission is often the optimal beam pair for uplink transmission, and vice versa.
  • this uplink and downlink consistency is called beam consistency.
  • Beam coherence means that once a suitable beam pair has been selected in one transmission direction, that beam pair can be used directly in the opposite direction.
  • Beam management can generally be divided into the following parts:
  • the initial beam establishment refers to the function and process of initially establishing a beam pair for the uplink and downlink directions.
  • the terminal obtains the SSB (Synchronization Signal Block, synchronization signal block) sent by the network device.
  • SSB Synchronization Signal Block
  • a network device will send multiple SSBs, these SSBs are sent in sequence, and each SSB is borne on a different downlink sending beam.
  • the SSB is associated with the downlink transmit beam, and on the other hand, the SSB is also associated with the uplink random access opportunity (RACH Occasion, RO), preamble and other resources, so that the network device can know the selected by the terminal through random access.
  • RACH Occasion, RO uplink random access opportunity
  • the terminal may measure a set of reference signals, these reference signals may correspond to a set of downlink beams, and the terminal may determine an optimal pair of downlink beams through the measurement.
  • the terminal reports the optimal downlink transmission beam information determined by the measurement to the network device, and the network device will decide whether to adjust the downlink transmission beam used subsequently according to the measurement result.
  • Beam recovery refers to the process of recovering the beam pair in time when the transmission of the current beam pair is blocked.
  • the beam recovery process includes three steps: beam failure detection, identification of new alternative beams, terminal recovery request and network response.
  • the present application focuses on initial beam establishment and beam adjustment, which will be further explained in subsequent embodiments.
  • FIG. 1 shows a block diagram of a 5G communication system provided by an exemplary embodiment of the present disclosure.
  • the communication system may include: an access network 12 and a terminal 14 .
  • the access network 12 includes several network devices 120 .
  • the network device 120 may be a base station, which is a device deployed in an access network to provide a wireless communication function for a terminal.
  • the base station may include various forms of macro base station, micro base station, relay station, access point and so on.
  • the names of devices with base station functions may be different.
  • eNodeBs or eNBs In systems using different radio access technologies, the names of devices with base station functions may be different. For example, in LTE systems, they are called eNodeBs or eNBs; in 5G NR systems, they are called gNodeBs or gNBs.
  • the description of "base station” may change.
  • the above-mentioned apparatuses for providing a wireless communication function for the terminal 14 are collectively referred to as network devices.
  • the terminal 14 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems with wireless communication functions, as well as various forms of user equipment, mobile stations (Mobile Station, MS), Terminal device (terminal device) and so on.
  • the network device 120 and the terminal 14 communicate with each other through some air interface technology, such as a Uu interface.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • CDMA wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • LTE-A Advanced Long Term Evolution
  • NR New Radio
  • evolution systems of NR systems LTE on unlicensed frequency bands (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to Everything
  • FIG. 2 is a flowchart of a beam management method according to an exemplary embodiment of the present application.
  • the method can be applied to the 5G communication system shown in FIG. 1.
  • the beam management method can include the following: At least part of the content:
  • Step 210 The network device sends an RRC release message to the terminal, where the RRC release message carries measurement configuration information.
  • the measurement configuration information is used for the terminal to determine the measurement configuration.
  • the network device When the terminal enters the inactive state, the network device will send measurement configuration information to the terminal, so that the terminal can perform operations such as cell reselection and RRC connection recovery according to the acquired measurement configuration information.
  • Step 220 The terminal acquires measurement configuration information.
  • the NR terminal can perform different measurements. For most configured measurements, the terminal needs to report the measurement results to the network device.
  • the measurement configuration information includes the measurement object, the measurement reporting quantity and the actual reporting method.
  • the number of measurement reports in the measurement configuration information may be multiple items or one item.
  • the measurement and reporting quantity includes: indicating the reported received signal strength, or referred to as RSRP (Reference Signal Received Power, reference signal received power).
  • RSRP Reference Signal Received Power
  • NR not only uses RSRP measurement reporting in RRM (Radio Resource Management, radio resource management), but also introduces RSRP reporting at layer 1, which is applied to beam management.
  • RSRP reporting at layer 1 may be referred to as L1-RSRP.
  • the measurement configuration information includes at least one group of measurement objects, that is, physical resources for downlink measurement.
  • a measurement resource configuration is associated with at least one resource set, and the terminal uses the resource set to measure channel characteristics.
  • the resource set in the inactive state may include a set of configured SSBs, and each SSB corresponds to one beam.
  • the measurement configuration information is predefined; or, the measurement configuration information is determined according to the radio resource control RRC release message.
  • the RRC release message is a message sent by the network device to the terminal before the terminal enters the RRC inactive state.
  • the message can be sent through RRC signaling, cell broadcast or other proprietary signaling, which is not limited in this application. .
  • Step 230 The terminal measures the SSB in the inactive state according to the measurement configuration.
  • the measurement configuration includes: a set of SSBs to be measured and a measurement item.
  • the measurement item may be RSRP.
  • the terminal measures the RSRP of each SSB according to the measurement configuration.
  • Step 240 The terminal determines the first beam information according to the measurement result.
  • the first beam information is information used to instruct the network device to adjust the downlink transmit beam and the uplink receive beam.
  • the terminal determines the optimal downlink receiving beam according to the measurement result, and determines the optimal uplink transmission beam of the terminal according to the principle of beam consistency.
  • the terminal can also determine which beam of the network device has the best signal quality when the terminal uses the optimal uplink transmission beam to send data packets to the network device, so as to determine the optimal downlink transmission beam of the network device.
  • the terminal obtains RSRP values corresponding to multiple SSBs through measurement, from which the terminal determines a unique SSB, and considers that the beam corresponding to the SSB is the optimal downlink transmission beam of the network device.
  • the terminal determines through measurement that the optimal downlink receiving beam is beam A, and according to the principle of beam consistency, the optimal uplink transmission beam of the terminal is also beam A. Similarly, through measurement, the terminal determines that the optimal downlink transmit beam of the network device is beam 1. According to the principle of beam consistency, the optimal uplink receive beam of the network device is also beam 1.
  • the determination of the first beam information by the terminal according to the measurement result includes the following two possible implementation manners:
  • the terminal determines the SSB with the largest RSRP as the first SSB according to the measurement result.
  • the identifier corresponding to the first SSB is determined as the first beam information.
  • the terminal uses an SSB whose RSRP is greater than a threshold value as a candidate SSB according to the measurement result, and obtains at least one SSB.
  • a target SSB is determined from at least one candidate SSB, and an identifier corresponding to the target SSB is determined as the first beam information.
  • the above-mentioned identification includes the synchronization signal block index SSB index.
  • the first SSB and the target SSB are used to indicate a certain beam among the communication beams supported between the terminal and the network device. Determining the target SSB from the candidate SSBs may be based on the RSRP value, or may be based on other selection principles, which is not limited in this application, as long as only one SSB is selected.
  • the above-mentioned threshold value may be a preset value, or may be a value carried by the network device in the measurement configuration information, which is not limited in this application.
  • the terminal needs to perform the beamforming measurement of the receiving end (terminal) in the process of downlink reception, the terminal needs to use different receiving beams to measure the SSB sent in the downlink, and the measurement results are used by the terminal itself.
  • the uplink transmission beam used by the network device needs to be reported to the network device. Therefore, the first beam information mentioned in this application is used to indicate the optimal downlink transmission beam and uplink reception beam of the network device.
  • the first beam information may be: SSB-2, and the downlink transmit beam corresponding to SSB-2 is beam 2.
  • the first beam information indicates that when the terminal uses beam B to send uplink data packets, the optimal uplink receiving beam of the network device is beam 2 .
  • Step 250 The terminal uses the uplink resources for IDT to report the first beam information to the network device.
  • the uplink resources used for IDT include any of the following uplink resources:
  • the configuration authorization CG resource configured by the network device for the terminal for inactive data transmission
  • the uplink resource for inactive data transmission scheduled by the network device through the PDCCH is scheduled by the network device through the PDCCH.
  • the uplink resources configured above may be included in the acquired measurement configuration information, or may be notified to the terminal through a separate message before the terminal performs beam measurement of the terminal, which is not limited in this application.
  • the terminal may report the first beam information through a MAC CE (MAC Control Element, medium access control control information element).
  • MAC CE MAC Control Element, medium access control control information element
  • the method for the terminal to report the first beam information is not limited to the above-mentioned MAC CE. It is only emphasized here that the terminal needs to report the first beam information to the network device.
  • Step 260 The network device receives the first beam information reported by the terminal.
  • the first beam information is reported through uplink resources used for inactive data transmission IDT, and the first beam information is determined by the terminal measuring the synchronization signal block SSB according to the measurement configuration.
  • the uplink resources used for IDT include any of the following uplink resources:
  • the uplink resource indicated by the first scheduling grant sent by the RAR is responded to by random access;
  • the configuration authorization CG resource configured by the network device for the terminal for inactive data transmission
  • the uplink resource for inactive data transmission scheduled by the network device through the physical downlink control channel PDCCH.
  • receive the first beam information reported by the terminal including:
  • the first beam information is received through the MAC CE.
  • Step 270 The network device adjusts the downlink transmit beam and the uplink receive beam according to the first beam information.
  • the network device determines the downlink transmit beam corresponding to the SSB index according to the SSB index in the first beam information. At the same time, according to the principle of beam consistency, the network device can determine the optimal uplink receive beam, and use the beam to receive subsequent data packets sent by the terminal. . When the network device needs to send a message to the terminal, the downlink transmission beam corresponding to the SSB index is also used.
  • the SSB index indicates the same beam supported by the network device, only the uplink and downlink directions are different when receiving and sending data.
  • the downlink transmit beam corresponding to SSB-2 is beam 2.
  • the first beam information indicates that when the terminal uses beam B to send an uplink data packet, the optimal uplink receiving beam of the network device is also beam 2 .
  • the network device can adjust the beam receiving the data packets to beam 2, and use beam 2 to transmit subsequent data packets with the terminal until it receives a new data packet sent by the terminal. beam information.
  • the network device sends configuration measurement information to the terminal when the terminal enters the RRC inactive state, and the terminal obtains the configuration measurement information, and measures the RSRP of a group of SSBs in the inactive state according to the measurement configuration.
  • the first beam information is determined, and the first beam information is reported to the network device by using the uplink resources used for IDT transmission, so that the network device can adjust the uplink receiving beam and the downlink transmitting beam in time according to the first beam information to ensure that It improves the communication quality between the network device and the terminal.
  • Scenario 1 Beam management is implemented based on a four-step random access procedure.
  • Scenario 2 Beam management is implemented based on a two-step random access procedure.
  • Scenario 3 Implement beam management based on CG resources.
  • the beam management method shown in FIG. 2 can be used to implement beam measurement, reporting of first beam information, and beam adjustment processes in an inactive state.
  • FIG. 3 shows a flowchart of a beam management method based on a four-step random access procedure provided by an exemplary embodiment of the present application.
  • Step 310 The terminal determines the uplink transmit beam and the downlink receive beam through measurement, and informs the network device of the first beam information through Msg1 (preamble).
  • the terminal determines that the uplink transmission beam is beam A after configuration and measurement.
  • the network device does not know the direction of the uplink transmission beam of the terminal, so the network device maintains omnidirectional reception before receiving the random access Msg1 to avoid missing data or request messages sent by the terminal.
  • the optimal receiving beam of the network device is beam 2, so the SSB index corresponding to beam 2 is used as the first beam information.
  • the first beam information is sent to the network device through the RO resource associated with the SSB.
  • Step 320 The network device successfully receives the Msg1, determines that the downlink transmit beam and the uplink receive beam are beam 2, and adjusts its subsequent uplink receive beam and downlink transmit beam to beam 2.
  • the network device After correctly receiving the preamble, the network device sends a random access response to the terminal through beam 2 .
  • the random access response may include: a scheduling grant, which is used to indicate the time-frequency domain resources that the terminal can use when transmitting the subsequent Msg3.
  • a scheduling grant which is used to indicate the time-frequency domain resources that the terminal can use when transmitting the subsequent Msg3.
  • the uplink resources granted by the scheduling can be used to transmit the second beam information.
  • the second beam information here is only to distinguish it from the first beam information.
  • Both the second beam information and the first beam information are information used to instruct the network device to perform beam adjustment, and only the first beam information Different from the SSB index carried in the second beam information.
  • Step 330 When the terminal detects the change of the beam, it is determined according to the measurement result that the optimal downlink transmission beam of the network equipment is changed from beam beam 2 to beam 1, and at the same time, it is determined that when the network equipment transmits with beam 1, the optimal receiving beam of the terminal is determined by Beam A becomes beam B.
  • the terminal uses beam A to send Msg3 to the network device, where the Msg3 includes the second beam information.
  • the second beam information is the SSB index of the SSB corresponding to beam 1, and the terminal may carry the second beam information in the MAC CE on the uplink resource.
  • Step 340 The network device uses the beam 2 before adjustment to receive the above Msg3, and adjusts the downlink transmission beam to beam 1 according to the second beam information.
  • the network device sends the Msg4 for contention resolution to the terminal through beam 1, and at the same time, the terminal uses the adjusted beam B to receive the Msg4.
  • Step 350 The network device sends the first scheduling grant to the terminal through beam 1, and the terminal uses the time-frequency domain resources indicated by the first scheduling grant to transmit data packets.
  • Step 360 Before the terminal uses the resource of the first scheduling grant to send the data packet, the terminal detects the beam change. Then, the third beam information is sent to the network device.
  • the terminal may carry the third beam information in the MAC CE on the uplink resource.
  • Step 370 The network device receives the third beam information through beam 1, and adjusts the subsequent downlink transmit beam and uplink receive beam to beam 2.
  • the terminal also adjusts the downlink receiving beam to beam A.
  • the network device will always use beam 2 to receive uplink data, and use beam 2 to send downlink data until the network device sends an RRC release message.
  • the terminal performs SSB measurement before conflict resolution to determine whether a beam change has occurred.
  • the SSB index of the SSB corresponding to the optimal downlink transmission beam is reported to the network device as the first beam information. In this way, beam management can be implemented in the inactive state, which ensures the network device and the terminal. quality of communication between them.
  • FIG. 4 shows a flowchart of a beam management method based on a two-step random access process provided by an exemplary embodiment of the present application
  • Step 410 The terminal determines the uplink receive beam and the downlink transmit beam through measurement, and informs the network device of the first beam information through MsgA (preamble).
  • the terminal determines through measurement that the optimal uplink transmission beam of the terminal is beam A, and the optimal downlink transmission beam of the network device is beam 2.
  • the network device receives uplink data and messages omnidirectionally, and after receiving the first beam information, determines the downlink transmit beam as beam 2, and determines the optimal uplink receive beam of the network device as beam 2 according to the principle of beam consistency.
  • the first beam information is sent to the network device through the RO resource associated with the SSB.
  • the terminal After sending MsgA, the terminal sends the information payload MsgA Payload of message A to the network device. At this time, the network device uses beam 2 to receive the MsgA Payload from the terminal.
  • the terminal after sending the MsgA Payload, the terminal measures the SSB according to the measurement configuration to determine whether the beam changes.
  • the terminal determines that the optimal downlink receiving beam is changed from beam A to beam B, and similarly, the optimal downlink transmission beam of the network device is changed from beam 2 to beam 1.
  • Step 420 The network device sends a contention conflict resolution message to the terminal through beam 2.
  • Step 430 The network device sends the uplink scheduling grant to the terminal through beam 2, and the terminal uses the time-frequency domain resources indicated by the uplink scheduling grant to transmit data packets.
  • Step 440 The terminal detects the beam change before using the uplink resource to send the data packet, and sends the second beam information to the network device through the MAC CE.
  • the second beam information is the SSB index of the SSB corresponding to beam 1.
  • the second beam information here is only to distinguish it from the first beam information.
  • Both the second beam information and the first beam information are information used to instruct the network device to perform beam adjustment, and only the first beam information Different from the SSB index carried in the second beam information.
  • Step 450 The network device successfully receives the second beam information through the original beam 2, and adjusts the downlink transmission beam to beam 1 for subsequent data transmission.
  • the terminal adjusts the downlink receiving beam to beam B.
  • the network device will always use beam 1 to receive uplink data, and use beam 1 to send downlink data until the network device sends an RRC release message.
  • the terminal performs SSB measurement before receiving the MsgB, to determine whether the beam changes.
  • the first beam information is reported to the network device through uplink resources.
  • the first beam information is the SSB index of the SSB corresponding to the optimal downlink transmit beam of the network device.
  • the network device can adjust its own uplink receive beam and downlink transmit beam according to the first beam information, ensuring that the terminal and the network device are in an inactive state. quality of communication.
  • FIG. 5 shows a flowchart of a method for beam management based on CG resources provided by an exemplary embodiment of the present application.
  • Step 510 The terminal determines the uplink transmit beam and the downlink receive beam, such as beam A, through measurement. At the same time, the terminal determines the optimal downlink transmit beam and uplink receive beam of the network device through measurement, such as beam 2, and uses the SSB index of the SSB corresponding to beam 2 as the first beam information.
  • the network device Since the network device is pre-configured with periodic transmission resources, there is no need to wait for the scheduling authorization of the network device during use.
  • the MAC CE when using the CG resource for IDT transmission, the MAC CE carries the above-mentioned first beam information to inform the network device of the optimal downlink transmission beam.
  • the network device omnidirectionally receives the uplink data sent by the terminal, and if successfully received, determines the downlink transmission beam and the uplink reception beam for subsequent data transmission through the first beam information reported by the terminal.
  • the network device adjusts its own downlink transmit beam and uplink receive beam to beam 2 after receiving the information.
  • the terminal After sending the first beam information, the terminal continues to measure the SSB according to the measurement configuration to determine whether the beam changes.
  • Step 520 The network device sends the uplink scheduling grant to the terminal through beam 2, and the terminal uses the time-frequency domain resources indicated by the uplink scheduling grant to transmit data packets.
  • Step 530 Before the terminal sends the data packet on the uplink resource, if the change of the beam is detected, the changed second beam information is sent to the network device through the MAC CE.
  • the terminal uses uplink resources to send data packets, it is determined that the optimal downlink receiving beam of the terminal is changed from beam A to beam B. Similarly, the optimal downlink transmission beam of the network device is changed from beam 2 to beam 1.
  • the second beam information is the SSB index of the SSB corresponding to beam 1.
  • Step 540 The network device successfully receives the second beam information through the original beam 2, and adjusts the downlink transmission beam to the beam 1 for subsequent data transmission.
  • the terminal adjusts the downlink receiving beam to beam B.
  • the network device will always use beam 1 to receive uplink data, and use beam 1 to send downlink data until the network device sends an RRC release message.
  • the terminal sends the first beam information based on the preconfigured CG resources, and the network device adjusts the uplink receiving beam and the downlink sending beam according to the first beam information.
  • the whole process does not need to wait for the configuration authorization of the network device, which is simple and fast.
  • the first beam information indicates the optimal downlink transmit beam and uplink receive beam of the network device, the communication quality between the terminal and the network device in the inactive state is guaranteed.
  • FIG. 6 is a schematic structural diagram of a beam management apparatus according to an exemplary embodiment.
  • the apparatus 600 may become a terminal, or be implemented as a part of the terminal.
  • the apparatus 600 includes: a measurement module 610 , a determination module 620 and a transmission module 630 .
  • a measurement module 610 configured to measure the synchronization signal block SSB in an inactive state according to the measurement configuration
  • a determining module 620 configured to determine first beam information according to the measurement result, where the first beam information is information used to instruct the network device to adjust the downlink transmit beam and the uplink receive beam;
  • the sending module 630 is used for the terminal to report the first beam information to the network device by using the uplink resource used for the inactive data transmission IDT.
  • the uplink resources used for IDT include any one of the following uplink resources:
  • the configuration authorization CG resource configured by the network device for the terminal for inactive data transmission
  • the uplink resource for inactive data transmission scheduled by the network device through the physical downlink control channel PDCCH.
  • the determining module 620 includes:
  • a first determination submodule configured to determine the SSB with the largest reference signal received power RSRP as the first SSB according to the measurement result
  • the second determination submodule is configured to determine the identifier corresponding to the first SSB as the first beam information.
  • the determining module 620 includes:
  • the third determination sub-module is configured to use the SSB whose RSRP is greater than the threshold value as the candidate SSB according to the measurement result, and obtain at least one candidate SSB;
  • a fourth determination submodule configured to determine a target SSB from at least one candidate SSB
  • the fifth determination sub-module is configured to determine the identifier corresponding to the target SSB as the first beam information.
  • the identification includes: a synchronization signal block index SSB index.
  • the apparatus 600 further includes:
  • the obtaining module 640 is configured to obtain measurement configuration information.
  • the measurement configuration information is predefined
  • the measurement configuration information is determined according to the radio resource control RRC release message.
  • reporting the first beam information to the network device including:
  • the first beam information is reported through the medium access control control information element MAC CE.
  • the terminal measures the synchronization signal block SSB in the inactive state according to the measurement configuration, determines the first beam information according to the measurement result, uses the uplink resources for data transmission IDT in the inactive state, and sends the data to the network device. Report the first beam information.
  • the first beam information is the information used to instruct the network device to adjust the downlink transmit beam and the uplink receive beam. Therefore, the terminal not only determines its own optimal downlink receive beam through measurement, but also determines the network device's optimal downlink transmit beam, and uses the first beam.
  • the beam information is reported to the network device, which realizes beam management in the inactive state and ensures the communication quality between the terminal and the network device.
  • FIG. 7 is a schematic structural diagram of an apparatus for beam management according to another exemplary embodiment.
  • the apparatus may be implemented as a network device, or may be implemented as a part of a network device.
  • the apparatus 700 includes a receiving module 710, a sending module 720, and an adjustment module. Module 730.
  • the receiving module 710 is configured to receive the first beam information reported by the terminal, the first beam information is reported through the uplink resources used for the inactive data transmission IDT, and the first beam information is the synchronization signal block SSB according to the measurement configuration of the terminal. determined by measurements.
  • the uplink resources used for IDT include any of the following uplink resources:
  • the uplink resource indicated by the first scheduling grant sent by the RAR is responded to by random access;
  • the configuration authorization CG resource configured by the network device for the terminal for inactive data transmission
  • the uplink resource for inactive data transmission scheduled by the network device through the physical downlink control channel PDCCH.
  • the apparatus 700 further includes:
  • the sending module 720 is configured to send a radio resource control RRC release message, where the RRC release message carries measurement configuration information, and the measurement configuration information is used for the terminal to determine the measurement configuration.
  • receive the first beam information reported by the terminal including:
  • the first beam information is received through the medium access control control information element MAC CE.
  • the apparatus 700 further includes:
  • the adjustment module is configured to adjust the downlink transmit beam and the uplink receive beam according to the first beam information.
  • the network device receives the first beam information reported by the terminal, the first beam information is reported through the uplink resources used for the inactive data transmission IDT, and the first beam information is the terminal according to the measurement configuration.
  • Signal block SSB as determined by measurements. Therefore, the network device can adjust its own uplink receiving beam and downlink transmitting beam according to the first beam information to adapt to the beam adjustment of the terminal, and ensure the communication quality between the terminal and the network device in the inactive state.
  • FIG. 8 shows a schematic structural diagram of a communication device (terminal or network device) provided by an exemplary embodiment of the present application.
  • the communication device includes: a processor 801, a receiver 802, a transmitter 803, a memory 804, and a bus 805.
  • the processor 801 includes one or more processing cores, and the processor 801 executes various functional applications and information processing by running software programs and modules.
  • the receiver 802 and the transmitter 803 may be implemented as a communication component, which may be a communication chip.
  • the memory 804 is connected to the processor 801 through the bus 805 .
  • the memory 804 may be configured to store at least one instruction, and the processor 801 is configured to execute the at least one instruction, so as to implement various steps performed by the first IAB network device in each of the foregoing method embodiments.
  • the memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, volatile or non-volatile storage device including but not limited to: magnetic disk or optical disk, EEPROM (Electrically Erasable Programmable read only memory, Electrically Erasable Programmable Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), SRAM (Static Random Access Memory, Static Access Memory), ROM (Read Only Memory, read-only memory), magnetic memory, flash memory, PROM (Programmable Read-Only Memory, programmable read-only memory).
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • SRAM Static Random Access Memory, Static Access Memory
  • ROM Read Only Memory, read-only memory
  • magnetic memory flash memory
  • PROM Programmable Read-Only Memory, programmable read-only memory
  • the present application provides a computer-readable storage medium, where at least one instruction is stored in the storage medium, and the at least one instruction is loaded and executed by the processor to implement the beam management method provided by each of the foregoing method embodiments.
  • the present application also provides a computer program product, which when the computer program product runs on the computer, causes the computer to execute the beam management methods provided by the above method embodiments.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

Abstract

La présente demande se rapporte au domaine technique des communications, et fournit un procédé, un appareil et un dispositif de gestion de faisceau, et un support de stockage. Le procédé comprend : en fonction d'une configuration de mesure, un terminal mesure, dans un état inactif, un bloc de signal de synchronisation (SSB) ; détermine des premières informations de faisceau en fonction du résultat de mesure, les premières informations de faisceau étant des informations pour ordonner à un dispositif réseau d'ajuster un faisceau de transmission en liaison descendante et un faisceau de réception en liaison montante ; et utilise une ressource de liaison montante pour une transmission de données inactive (IDT) pour rapporter les premières informations de faisceau au dispositif réseau. Le terminal, au moyen des premières informations de faisceau rapportées, indique au dispositif réseau si la direction de faisceau du terminal a changé ou non pendant une transmission de données, et le dispositif réseau, en fonction des premières informations de faisceau, ajuste le faisceau de transmission en liaison descendante et le faisceau de réception en liaison montante lors d'une communication avec le terminal. C'est-à-dire que, dans la présente demande, un dispositif réseau peut être notifié pour ajuster un faisceau lorsqu'un faisceau de transmission d'un terminal change, de manière à garantir la qualité de communication entre le dispositif réseau et le terminal.
PCT/CN2020/101656 2020-07-13 2020-07-13 Procédé, appareil et dispositif de gestion de faisceau, et support de stockage WO2022011505A1 (fr)

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CN202080101128.0A CN115669038A (zh) 2020-07-13 2020-07-13 波束管理方法、装置、设备及存储介质
PCT/CN2020/101656 WO2022011505A1 (fr) 2020-07-13 2020-07-13 Procédé, appareil et dispositif de gestion de faisceau, et support de stockage

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