WO2022253308A1 - Procédé de commutation de faisceau, et appareil - Google Patents

Procédé de commutation de faisceau, et appareil Download PDF

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Publication number
WO2022253308A1
WO2022253308A1 PCT/CN2022/096811 CN2022096811W WO2022253308A1 WO 2022253308 A1 WO2022253308 A1 WO 2022253308A1 CN 2022096811 W CN2022096811 W CN 2022096811W WO 2022253308 A1 WO2022253308 A1 WO 2022253308A1
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WIPO (PCT)
Prior art keywords
signals
switching
signal
time
beam switching
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PCT/CN2022/096811
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English (en)
Chinese (zh)
Inventor
张鹏
乔梁
张佳胤
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华为技术有限公司
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Publication of WO2022253308A1 publication Critical patent/WO2022253308A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a beam switching method and device.
  • a base station usually configures a wider analog beam to transmit a broadcast signal (for example, the broadcast signal is a synchronization signal block (synchronization signal block, SSB)).
  • the base station usually configures a narrower analog beam to transmit data signals (such as channel sounding reference signal (SRS)), and the terminal equipment as the receiving end needs to perform beam switching to perform corresponding reception on the analog beam.
  • SRS channel sounding reference signal
  • the processing capability of the terminal equipment is usually limited to a certain extent. How to perform beam switching to ensure the communication quality of the terminal when the switching capability of the terminal is limited has become an urgent problem to be solved.
  • the present application provides a beam switching method and device, so as to ensure communication service quality when terminal equipment performs beam switching.
  • the present application provides a beam switching method, which can be executed by a terminal device.
  • the terminal device can be understood as a vehicle-mounted device, a mobile phone, an Internet of Things device, etc., and can also be understood as a module in the terminal device (for example, chip), which is not specifically limited in this application.
  • the terminal device may determine S signals to be processed in the first time unit, at least two of the S signals have different priorities, and the signal categories of the S signals include one or more of the following: SSB, control resource set ( control-resource set, CORESET), SRS or physical downlink shared channel (physical downlink shared channel, PDSCH), S is a positive integer greater than or equal to 2; in the first time unit, beam switching is performed according to the beam switching rule and signal The beam switching rule is determined according to the priorities of the S signals for sending or receiving.
  • the first time unit may be one of a time slot, a symbol, a symbol group, a subframe, and a radio frame, and may also be other time domain resource units, which are not specifically limited in this application.
  • the number of beam switching that a terminal device can support in a time unit is limited, such as 2 or 4 times, but a terminal device may send or receive multiple signals in a time unit, and different signals may pass through different beams It is sent or received, so beam switching will occur in a time unit.
  • the signal-to-noise ratio of the received signal may be reduced, the performance of the system may be reduced, the communication requirements of terminal devices cannot be met, and the user experience may be reduced.
  • This application fully considers the number of beam switching supported by the terminal device in the first time unit and the priority of each signal in the first time unit, and flexibly adjusts the beam switching rules according to the priority of each signal, which can ensure the communication service quality of the terminal device. At the same time, it can also improve the service experience of users.
  • the first time unit includes a plurality of preset switching times
  • the terminal device can select N target switching times from the multiple preset switching times according to the priorities of the S signals, and the target The terminal device performs beam switching at the switching moment, N is less than or equal to the number of beam switching supported by the terminal device in the first time unit, N is less than or equal to S, and N is a positive integer.
  • the terminal device can judge how many preset switching moments may exist in the first time unit based on this (that is, the beam switching time), for example, there are 5 signals, and the corresponding preset switching time may be 5 or less than 5, and the present application does not specifically limit the preset switching time existing in the first time unit. quantity.
  • the terminal device selects the preset switching time corresponding to the signal with a higher priority as the target switching time, and performs beam switching , in this manner, the communication service quality of the terminal device can be guaranteed.
  • different preset switching times are indicated by different time sequence numbers; the values of the time sequence numbers are associated with the switching sequence of the beam switching information.
  • the signal corresponding to the preset switching time T is sent or received according to the first beam at the preset switching time T; The beam corresponding to the switching time of the adjacent target.
  • the first time unit determines three signals, namely signal 1, signal 2, and signal 3.
  • the priority of signal 3 is higher than that of signal 2, and the priority of signal 2 is higher than that of signal 1.
  • the first time unit exists There are 3 preset switching moments, which appear before sending or receiving signal 1, signal 2 and signal 3 respectively.
  • the preset switching time before sending or receiving signal 3 can be set as preset switching time 1
  • the preset switching time before sending or receiving signal 2 can be set as preset switching time
  • the preset switching time before sending or receiving signal 1 is set as preset switching time 3 .
  • the number of times of beam switching supported by the first time unit is 2, among which, 1 is less than 2, then at the preset switching time 1, the preset beam 3 can be sent, or the signal 3 can be received; 2 is equal to 2, then the preset Switching time 2 is transmitted according to preset beam 2, or signal 2 is received; 3 is greater than 2, then beam switching is not performed at preset switching time 3, and signal 1 can be transmitted or received according to preset beam 3 or preset beam 2.
  • the terminal device may select M beams according to the priorities of the S signals, perform beam switching among the M beams, and use the M beams for sending, and/or, receive the S signals, M is an integer, and M is smaller than S.
  • the terminal device selects M beams in the first time unit, where M is less than or equal to the number of beam switching times supported by the terminal device in the first time unit.
  • the target switching moment is located in the time domain resource of the low priority signal.
  • the target switching time is located in the time-domain resource of the low-priority signal, which can ensure accurate reception or transmission of the high-priority signal, and can ensure the communication quality of the terminal device.
  • the priorities of the S signals can be configured through configuration information.
  • the configuration information may also be used to configure sending beams or receiving beams of L signals, where the L signals are one or more of the S signals, and L is less than or equal to S.
  • the terminal device does not need to determine how to switch the beam in the first time unit according to the priority of the signal. In this way, the data processing pressure of the terminal device can be reduced and the data processing efficiency can be improved.
  • the configuration information is carried in the following signaling: radio resource control (radio resource control, RRC), or media access control (media access control control element, MAC CE), or downlink control information ( downlink control information, DCI).
  • RRC radio resource control
  • MAC CE media access control control element
  • DCI downlink control information
  • the configuration information is activated or deactivated through a value of a preset indication field in the DCI.
  • the preset indication field is 1 bit or multiple bits.
  • the types of the S signals may include one or more of the following: SSB, CORESET, channel state information reference signal (channel state information reference signal, CSI-RS), SRS, physical uplink Control channel (physical uplink control channel, PUCCH), physical uplink shared channel (physical uplink shared channel, PUSCH) and PDSCH.
  • SSB channel state information reference signal
  • CSI-RS channel state information reference signal
  • SRS physical uplink Control channel
  • PUCCH physical uplink control channel
  • PUCCH physical uplink shared channel
  • PUSCH physical uplink shared channel
  • the priority of the signal may be adjusted, and the priority of the signal corresponding to the information carried by the PUSCH is also different. This application does not specifically limit it here. How to define the priority level of the signal.
  • the present application provides a communication device, including: a processing unit and an input and output unit.
  • the processing unit is used to determine the S signals to be processed in the first time unit, at least two of the S signals have different priorities, and the signal categories of the S signals include one or more of the following: synchronization signal Block SSB, control resource set CORESET, channel sounding reference signal SRS or physical downlink shared channel PDSCH, S is a positive integer greater than or equal to 2; the input and output unit is used to perform beam switching according to the beam switching rule within the first time unit And to send or receive signals, the beam switching rule is determined according to the priorities of the S signals.
  • the first time unit includes multiple preset switching times
  • the beam switching rule includes: selecting N target switching times from the multiple preset switching times according to the priorities of the S signals, and Beam switching is performed at the target switching time, N is less than or equal to the number of beam switching supported by the terminal device in the first time unit, N is less than or equal to S, and N is a positive integer.
  • the first time unit includes a plurality of preset switching times
  • the communication device may select N target switching times from the multiple preset switching times according to the priorities of the S signals, and the target The terminal device performs beam switching at the switching moment, and N is less than or equal to the number of beam switching times supported by the terminal device in the first time unit.
  • different preset switching times are indicated by different time sequence numbers; the values of the time sequence numbers are associated with the switching sequence of the beam switching information.
  • the time sequence number corresponding to the preset switching time T is T
  • the number of beam switching supported by the first time unit is C
  • both T and C are positive integers; if T is less than or equal to C, determine The preset switching time T is the target switching time; or, if T is greater than C, it is determined that the preset switching time N is not the target switching time.
  • the signal corresponding to the preset switching time T is sent or received according to the first beam at the preset switching time T; The beam corresponding to the switching time of the adjacent target.
  • the priorities of the S signals are configured through configuration information.
  • the signal categories of the S signals include: SSB, CORESET, SRS and PDSCH; the priority of SSB is higher than that of CORESET; the priority of CORESET is higher than that of SRS; the priority of SRS is higher than that of PDSCH.
  • the configuration information is also used to configure a sending beam or a receiving beam for L signals, where the L signals are one or more of the S signals, and L is less than or equal to S.
  • the configuration information is carried in the following signaling: RRC, or MAC CE, or DCI.
  • the configuration information is activated or deactivated through a value of a preset indication field in the DCI.
  • the input and output unit is used to: select M beams according to the priority of S signals, perform beam switching between M beams, and M beams are used for transmission, and/or, receive S signals, M is a positive integer, and M is smaller than S.
  • the target switching moment is located in the time domain resource of the low priority signal.
  • the present application provides a communication device, including at least one processor.
  • the processor executes a computer program (which can also be code or instruction), so that the communication device performs the above-mentioned first aspect or The method of the embodiments of the first aspect.
  • the communication device further includes a memory; the memory is used to store computer programs.
  • the memory and the processor may be integrated in the same chip or device, or may be independent chips, which are not specifically limited in this application.
  • the present application provides a computer program product containing instructions, which, when run on a computer, causes the computer to execute the above-mentioned first aspect or the method of each embodiment of the first aspect.
  • the present application provides a communication system, the system includes terminal equipment and network equipment, and the communication system is used to implement the method described in the first aspect or any possible design of the first aspect .
  • FIG. 1 shows a schematic diagram of a communication system provided by an embodiment of the present application
  • Fig. 2 shows a schematic diagram of a beam switching method
  • FIG. 3 shows a schematic flowchart of a beam switching method provided by an embodiment of the present application
  • FIG. 4 shows a schematic diagram of a method for determining the number of times of beam switching provided by an embodiment of the present application
  • FIG. 5 shows a schematic diagram of a preset switching time used in an embodiment of the present application
  • FIG. 6 shows a schematic diagram of the target switching time provided by the embodiment of the present application.
  • FIG. 7 shows a schematic diagram of beam switching provided by an embodiment of the present application.
  • FIG. 8 shows a schematic diagram of beam switching provided by an embodiment of the present application.
  • FIG. 9 shows a schematic diagram of beam switching provided by an embodiment of the present application.
  • FIG. 10 shows a schematic diagram of beam switching provided by an embodiment of the present application.
  • FIG. 11 shows a schematic structural diagram of a beam switching device provided by an embodiment of the present application.
  • FIG. 12 shows a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 1 illustrates a communication system 100 suitable for use in the present application.
  • the communication system 100 includes a network device 110 , a terminal device 120 and a terminal device 130 .
  • the network device 110 can send a signal to the terminal device 120 or the terminal device 130 through the beam, and the terminal device 120 or the terminal device 130 can also receive the signal from the network device 110 through the corresponding beam.
  • This process can be understood as the transmission of downlink signals.
  • the terminal device 120 or the terminal device 130 can send a signal to the network device 110 through the beam, and the network device 110 can receive the signal from the terminal device 120 or the terminal device 130 through the corresponding beam, and this process can be understood as the transmission of an uplink signal.
  • the network device is a device deployed in a wireless access network to provide a wireless communication function for a terminal device.
  • Network equipment A device with wireless transceiver function or a chip that can be set on the device including but not limited to: evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (wireless fidelity, WIFI) system access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point, TP), etc., can also be a gNB in a 5G (such as NR) system, or, a transmission point (TRP or TP), one or a group
  • the access network device may be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into network devices in the access network RAN, and the CU can also be divided into network devices in the core network CN, which is not limited here.
  • the terminal device may include user equipment (user equipment, UE), V2X terminal device, wireless terminal device, mobile terminal device, device-to-device communication (device-to-device, D2D) terminal device, machine-to-machine/machine-type communication ( machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, internet of things (IoT) terminal equipment, subscriber unit, subscriber station, mobile station , remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or user equipment (user device), wearable devices, vehicle-mounted devices, etc.
  • IoT internet of things
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • vehicle-mounted terminal devices such as vehicle-mounted terminal devices are also called on-board units (on-board unit, OBU ).
  • OBU on-board unit
  • High frequencies typically employ different configurations of analog beams to receive or transmit different types of signals. For example, if a base station wants to send a broadcast signal, it usually configures a wider analog beam to send it. If the base station wants to send data signals, it usually configures narrower analog beams for transmission. In addition, the change of the transmitting and receiving direction of the analog beam can be realized by changing the configuration of the analog beam.
  • the capability of the terminal is set, for example, the number of beam switching times that can be performed in each time slot.
  • the number of times of beam switching can be understood as the number of times of changing the configuration of the analog beam. For example, there are 14 symbols in a time slot. In an extreme case, each symbol can use a different beam for communication, so the terminal supports 14 beam switching per time slot. For UEs with relatively poor capabilities, beam switching can be performed at least 4 times per slot. The beam switching mentioned above will not affect the communication of normal symbols.
  • each time slot is switched 4 times. At this time, the time slot length is 0.125 milliseconds, and the average time is 0.03125 milliseconds. Under 960kHz SCS, the time slot length becomes 0.03125 milliseconds. If the ability to switch 4 times per time slot is still maintained, it will switch once every 0.0078125 milliseconds on average. Frequent beam switching is obviously unnecessary. Therefore, when the SCS is large, the number of handovers per time slot will be reduced, for example, only 2 handovers per time slot.
  • the terminal informs the base station of the maximum number of beam switches it supports in each time slot, and the base station will limit the scheduling based on the terminal's capabilities to avoid beam switching times exceeding the terminal's capabilities in one time slot. For example, the terminal informs the base station that each time slot can only be switched up to 4 times, then the base station can configure up to 4 different beams for communication in one time slot.
  • the communication mentioned above includes not only uplink communication, but also downlink communication. From the up (down) line to the down (up) line, if the beams used for uplink and downlink communication are the same, it can be considered as a beam switching, or it can be considered as no beam switching, that is, the original beam is retained . If the beams used for uplink and downlink communication are different, it must be considered that a beam switching has been performed.
  • the CORESET is a set of control channel resources, and is used to carry control signaling, for example, the control signaling used to indicate data transmission, that is, it is carried in the CORESET resource and sent through the PDCCH channel.
  • the beams corresponding to CORESET1, the beams corresponding to SSB1 and SSB2 may be different.
  • UL represents an uplink signal, which can carry uplink data, uplink control messages, and SRS.
  • SSB has the highest receiving priority, because UE needs to select the most suitable cell for access and judge the communication quality of the cell where it is located.
  • the UE If the UE has no way to switch to the beam of the SSB of the current pre-camped cell for measurement, it will affect the measurement accuracy of the UE for the SSB of the current pre-camped cell, causing the UE to mistakenly believe that it cannot camp on the current cell.
  • FIG. 3 for a beam switching method provided by the embodiment of the present application.
  • This method can be executed by a terminal device.
  • the terminal device is UE as an example for illustration.
  • the actual application does not specifically limit the specific for which.
  • the UE may perform the following:
  • Step 301 determine the S signals to be processed in the first time unit, at least two of the S signals have different priorities, and the signal categories of the S signals include one or more of the following: SSB, CORESET, SRS or PDSCH, S is a positive integer greater than or equal to 2.
  • the S signals may be uplink signals or downlink signals, and the present application does not specifically limit the types of the S signals.
  • the types of the S signals mentioned in this application may include one or more of the following: SSB, CORESET, SRS or PDSCH. Wherein, all or some models of the S signals may be of the same type.
  • the present application is only illustratively illustrated here, and the S signals may include more types of signals in practical applications, and the present application does not illustrate one by one here.
  • the S signals have different priorities, even signals of the same type have different priorities, for example, the priority of SSB1 is higher than that of SSB2, and the priority of the signal is related to the role of the signal in the communication process.
  • the priority level of the signal is indicated by the network device through the configuration information.
  • the priority level of S signals is indicated by the configuration information, but the UE can also flexibly adjust the priority level of the signal according to its own communication needs.
  • the network device indicates the priority of SSB1 The level is higher than SSB2, but the UE determines that the UE's communication effect is better under SSB2, for example, through data analysis of historical communication conditions, then the UE can adjust the priority of SSB2 to be higher than SSB1.
  • the priority of the signal may also be specified by the communication protocol, and the present application does not limit the way of determining the priority of the signal.
  • the priority of the signal can be determined by referring to the following Table 1.
  • the types of signals to be processed included in the first time unit include: SSB, CORESET, SRS and PDSCH, the priority of SSB is higher than that of CORESET; the priority of CORESET is high in SRS; the priority of SRS is higher than that of PDSCH.
  • the priority of the signal can be determined by referring to the following Table 2.
  • the priority of the SSB used for synchronization (signal synchronization with the base station) in the cell where the UE is currently camped is higher than that used for measurement (channel synchronization) in the cell where the UE is currently camped.
  • the SSB of the UE currently camping on the cell for measurement (that is, the SSB of the candidate cell or radio link monitoring (radio link monitoring, RLM)/beam failure recovery (beam failure recovery, BFR) CSI- RS) is higher than CORESET/PUCCH, CORESET is higher than PDSCH/PUSCH, and PDSCH/PUSCH is higher than CSI-RS for CQI.
  • radio link monitoring radio link monitoring, RLM
  • BFR beam failure recovery
  • the configuration information mentioned above may be indicated by one signaling, or may be indicated by multiple signalings, specifically, it may be indicated by RRC, MAC CE, and DCI, which is not specifically limited in this application.
  • step 302 within the first time unit, beam switching is performed according to a beam switching rule and signals are sent or received, and the beam switching rule is determined according to the priorities of the S signals.
  • the number of beam switching times in the first time unit is less than or equal to the number of beam switching times supported by the terminal device in the first time unit.
  • a terminal device may send or receive multiple signals in a time unit, and different signals may be sent through different beams, so beam switching may occur in a time unit.
  • the UE uses different beams to send or receive different signals. If the signals are not differentiated and the beams are directly switched to send or receive signals, the signals will not be received correctly.
  • the number of beam switching times that a terminal device can support within one time unit is limited. This application fully considers the number of beam switching supported by the terminal device in the first time unit and the priority of each signal in the first time unit, and flexibly adjusts the beam switching rules according to the types of different signals, so that the terminal device performs beam switching in the first time unit When , the efficiency of beam switching is improved within the capability of the terminal equipment, and the communication quality is improved.
  • the terminal device when performing beam switching, can determine the priority of the S signals in the first time unit and which beams can be used to send or receive the S signals when the beam switching does not occur, and determine the first How many preset switching moments (that is, beam switching moments) may exist in a time unit. For example, if there are 5 signals in the first time unit, the corresponding preset switching moments may be 5 or less than 5. How much is it? Can be determined flexibly. As shown in Figure 4, it is assumed that the handover that occurs at the start boundary of time slot 1 is agreed to be the handover in time slot 1, and the handover that occurs at the end boundary of time slot 1 is agreed to be the handover in the next time slot 2 (case 1).
  • case 1 is taken as an example to specify the preset switching time in each first time unit. It can be understood that, in other implementation manners, the preset switching time in each first time unit may be agreed with reference to case 2.
  • the terminal device selects the preset switching time corresponding to the signal with a higher priority level as the target switching time, and performs beam switching. This method can guarantee the communication service quality of the terminal equipment.
  • the terminal device determines the preset switching time, it can also consider whether the beams corresponding to different signals are the same or have a quasi co-location (quasi co-location, QCL) relationship; or have a spatial relation. If they are the same or have the above relationship, it is considered that the same beam is used to receive or transmit different signals, and the preset switching time may be less than the number of signals in the first time unit.
  • the signals to be received in the first time unit include CORESET1, SSB1, SSB2, and SRS1.
  • the preset switching moments in the first time unit are 3 (before CORESET1 , before SSB1 and before SRS1); if the receiving beam of SSB2 has a QCL relationship with the receiving beam of SSB1, then the preset switching time in the first time unit is also 3 (before CORESET1, before SSB1 and before SRS1); if CORESET1 It can be received through the same beam as SSB1, SSB2 and SRS1 have a spatial relation, then the preset switching time in the first time unit is 2 (before CORESET1, before SSB2 and before SRS1, because SRS1 is an uplink signal and SSB2 is a downlink signal Signal, even if the beams of SSB2 and SRS have a spatial relation, there is also the case of uplink and downlink switching. Although there is no beam switching, the uplink and downlink switching may take a certain delay).
  • different time sequence numbers may be used for different preset switching times; the values of different time sequence numbers are associated with the switching sequence of the beam switching information. For example, there are four signals in time slot 1, respectively CORESET1, SSB1, SSB2, and SRS1. As shown in FIG. 5 , the priority of SSB1 is higher than that of SSB2, the priority of SSB2 is higher than that of CORESET1, and the priority of CORESET1 is higher than that of SRS1.
  • the time sequence number corresponding to the preset switching time T is T
  • the number of beam switching supported by the first time unit is C
  • both T and C are positive integers
  • T is less than or equal to C
  • T is greater than C
  • determine that the preset switching time N is not the target switching time.
  • T is greater than C
  • the signal corresponding to the preset switching time T is sent or received according to the first beam at the preset switching time T; wherein, the first beam is a beam corresponding to a target switching time adjacent to the preset switching time T.
  • switching time 1 and switching time 2 are less than or equal to 2, both of which are target switching times, and SSB1 can be received through beam 2, SSB2 is received through beam 3, and switching time 3 and switching time 4 are both greater than 2, which is not the target switching time, as shown in Figure 6.
  • the switching time corresponding to CORESET1 is not the target switching time can be received through beam 0 in time slot 0, and SRS1 can be transmitted through beam 3 as shown in (a) in Figure 7; CORESET1 can also be transmitted through Beam 2 can be used to receive, and beams that have a QCL relationship with beam 0 or beam 2 can also be used to receive. Which beam to choose can be determined according to the service requirements of the UE. SRS can be sent through beam 3, as shown in (b) in Figure 7 Indicates that the present application does not make specific limitations here.
  • the terminal device can choose to receive CORESET1 through beam 1, and the terminal device can send SRS1 through beam 1 as shown in Figure 8 (a); or send SRS1 through beam 3 as shown in Figure 8 (a). Shown in (b) in Figure 8. Since CSI-RS1 is used for cell measurement, its corresponding beam cannot be used to send SRS1, and the CSI-RS1 used for cell measurement has little impact on communication quality and can not be received through the beam. For different service requirements of the terminal equipment, other situations may be involved. The specific selection of which beams to receive or transmit which signals can be flexibly adjusted according to the service conditions of the terminal equipment, which is not specifically limited in this application.
  • the terminal device can select M beams according to the priority of S signals, and perform beam switching between M beams, and M beams are used for transmission, and/or receive S signals, M is an integer, M is smaller than S.
  • M is an integer
  • M is smaller than S.
  • 4 signals are included in slot 1, but the beam for receiving or transmitting the signal is switched between beam 2 and beam 3 .
  • beam switching will occupy certain time-domain resources. As shown in Figure 9, there are 14 symbols in time slot 1, where CORESET1 occupies symbols 0-3, SSB1 occupies symbols 5-8, and SSB2 occupies symbols 8-8. 11. Wherein, the priority of SSB1 is higher than that of SSB2, and the priority of SSB2 is higher than that of CORESET1, and the target switching time may be located in the time domain resource of the low priority signal. Assuming that beam switching needs to occupy 1 symbol resource, then symbol 4 can be occupied for switching time 1, and symbol 9 can be occupied for switching time 2.
  • the time domain resource of the low priority signal or the blank time domain resource at the target switching time can ensure the accurate reception or transmission of the high priority signal and ensure the communication quality of the terminal equipment.
  • Fig. 10 shows a schematic diagram of another beam switching situation, which includes 14 symbols in time slot 1, where CORESET1 occupies symbols 0-3, CSI-RS1 occupies symbols 5-8, and SRS1 occupies symbols 8-11. Among them, CORESET1 and CSI-RS1 have higher priority levels than SRS1. Assume that SRS1 uses the beam 1 corresponding to CORESET1 to transmit. Since SRS1 is an uplink signal and CORESET1 is a downlink signal, although beam 1 has not been switched, the terminal equipment will occupy the number of symbols for uplink and downlink switching.
  • the occupied symbol resources can be Any symbol in the symbol resources 5-8 occupied by sending CSI-RS1 occupies symbol 7 as shown in (a) in Figure 10, and the symbol of SRS1 can also occupy symbol 9 as shown in Figure 10 (b).
  • the application does not make a specific limitation here, and the number of symbol resources occupied by the uplink and downlink switching may be the same as that of the beam switching, or may be different, and the application does not specifically limit it here.
  • the configuration information may also indicate transmission beams or reception beams of the L signals, where the L signals are one or more of the S signals, and L is less than or equal to S.
  • the terminal device can directly perform beam switching according to the configuration information of the network device, thereby reducing the data pressure of the terminal device.
  • the first time unit includes 4 signals which are signal 1, signal 2, signal 3 and signal 4 respectively, the priority of signal 1 is higher than that of signal 2, the priority of signal 2 is higher than that of signal 3, and the priority of signal 3 is above signal 4.
  • the network device may indicate the beams corresponding to all signals in the first time unit of the terminal device, or may only indicate the beams corresponding to some signals, and the beams corresponding to different signals may be the same or different, which is not specifically limited here.
  • the configuration information can also be activated or deactivated through the value of the preset indication field in DCI, because the configuration information only contains the priority of the signal, or which signal is sent by which beam Or receive, but when the terminal device executes it, it also needs to activate the signaling instruction.
  • the MAC CE configures the transmission beam of the signal in time slot 1, and the value of the DCI preset indication field can be used to activate the terminal device to send signals according to the transmission beam in the configuration information of the MAC CE.
  • Set the value of the indication field to deactivate the terminal device to send signals according to the sending beam in the MAC CE configuration information.
  • the preset indication field in DCI can be indicated by one or more bits. For example, there are 4 different types of signals in slot1, and the sequence of different types of signals in the time domain is: SSB1, SSB2, CORESET1 and PDSCH1.
  • the 2 bits in the DCI field can be used to instruct the terminal device to receive the signal in slot1, for example, when the 2 bits in the DCI field are "01", it means that the terminal device receives the SSB2 through the beam.
  • the 4 bits in the DCI field can be used to instruct the terminal device to receive the signal in slot1. For example, when the bits in the DCI field occupy 4 bits and are "0101", the terminal device receives SSB2 and PDSCH1 through the beam.
  • FIG. 11 shows a communication device provided by the present application, including: a processing unit 111 and an input and output unit 112 .
  • the communication device can be understood as a vehicle-mounted device, a mobile phone, an Internet of Things device, etc., and can also be understood as a module (for example, a chip) in a terminal device, which is not specifically limited in this application.
  • the input and output unit may be called a transceiver unit, a communication unit, etc., and when the communication device is a terminal device, the input and output unit may be a transceiver; the processing unit may be a processor.
  • the input and output unit can be an input and output interface, an input and output circuit or an input and output pin, etc., and can also be called an interface, a communication interface or an interface circuit etc.;
  • the processing unit may be a processor, a processing circuit or a logic circuit and the like.
  • the processing unit 111 is configured to determine the S signals to be processed in the first time unit, at least two of the S signals have different priorities, and the signal categories of the S signals include one or more of the following : Synchronization signal block SSB, control resource set CORESET, channel sounding reference signal SRS or physical downlink shared channel PDSCH, S is a positive integer greater than or equal to 2; the input and output unit 112 is used to switch according to the beam within the first time unit The beam is switched according to the rule and the signal is sent or received, and the beam switching rule is determined according to the priorities of the S signals.
  • the first time unit can be one of a time slot, a symbol, a symbol group, a subframe, and a radio frame, and can also be understood as a time span (time span), where a time span can represent an absolute time Length, such as 0.5ms or 1ms.
  • time span 0.5ms
  • the SCS is 960kHz
  • the length of a tme span is equal to 64 slots
  • the SCS is 480k
  • the length of a time span is equal to 32 slots.
  • a tme span is a time unit.
  • the present application does not make specific limitations here.
  • the number of beam switching that a terminal device can support in a time unit is limited, such as 2 or 4 times, but a terminal device may send or receive multiple signals in a time unit, and different signals may pass through different beams It is sent or received, so beam switching will occur in a time unit. If the signals are not differentiated or the beams are not switched to send or receive different signals, the signal-to-noise ratio of the received signal may be reduced, the performance of the system may be reduced, the communication requirements of terminal devices cannot be met, and the user experience may be reduced.
  • the first time unit includes a plurality of preset switching times
  • the communication device may select N target switching times from the multiple preset switching times according to the priorities of the S signals, and the target The terminal device performs beam switching at the switching moment, and N is less than or equal to the number of beam switching times supported by the terminal device in the first time unit.
  • the terminal device can judge how many preset signals may exist in the first time unit based on this.
  • Switching time that is, beam switching time
  • the terminal device selects the preset switching time corresponding to the signal with a higher priority as the target switching time, and performs beam switching , in this manner, the communication service quality of the terminal device can be guaranteed.
  • different preset switching times are indicated by different time sequence numbers; the values of the time sequence numbers are associated with the switching sequence of the beam switching information.
  • the time sequence number corresponding to the preset switching time T is T
  • the number of beam switching supported by the first time unit is C
  • both T and C are positive integers; if T is less than or equal to C, determine The preset switching time T is the target switching time; or, if T is greater than C, it is determined that the preset switching time N is not the target switching time.
  • the signal corresponding to the preset switching time T is sent or received according to the first beam at the preset switching time T; The beam corresponding to the switching time of the adjacent target.
  • the first time unit determines three signals, namely signal 1, signal 2, and signal 3.
  • the priority of signal 3 is higher than that of signal 2, and the priority of signal 2 is higher than that of signal 1.
  • the first time unit exists There are 3 preset switching moments, which appear before sending or receiving signal 1, signal 2 and signal 3 respectively.
  • the preset switching time before sending or receiving signal 3 can be set as preset switching time 1
  • the preset switching time before sending or receiving signal 2 can be set as preset switching time
  • the preset switching time before sending or receiving signal 1 is set as preset switching time 3 .
  • the number of beam switching supported by the first time unit is 2 times, where 1 is less than 2, then the preset beam 3 can be sent at the preset switching time 1, or the signal 3 can be received; 2 is equal to 2, then the preset switching can be performed At time 2, send according to preset beam 2, or receive signal 2; if 3 is greater than 2, then beam switching will not be performed at preset switching time 3, and can be sent according to preset beam 3 or preset beam 2, or receive signal 1.
  • the input and output unit is specifically configured to: select M beams according to the priorities of the S signals, perform beam switching among the M beams, and use the M beams for transmission, and/or, receive S signals, M is an integer, and M is smaller than S.
  • the terminal device selects M beams in the first time unit, where M is less than or equal to the number of beam switching times supported by the terminal device in the first time unit.
  • the signal categories of the S signals include: SSB, CORESET, SRS and PDSCH; the priority of SSB is higher than that of CORESET; the priority of CORESET is higher than that of SRS; the priority of SRS is higher than that of PDSCH.
  • the priorities of different types of signals may be determined through configuration information of the network device, or determined independently by the terminal device, which is not specifically limited in this application.
  • the priorities of the S signals are configured through configuration information.
  • the configuration information is also used to configure a sending beam or a receiving beam for L signals, where the L signals are one or more of the S signals, and L is less than or equal to S.
  • the terminal device does not need to determine how to switch the beam in the first time unit according to the priority of the signal. In this way, the data processing pressure of the terminal device can be reduced and the data processing efficiency can be improved.
  • the configuration information is carried in the following signaling: RRC, or MAC CE, or DCI.
  • the preset indication field is 1 bit or multiple bits.
  • the types of the S signals may include one or more of the following: SSB, CORESET, CSI-RS, SRS, PUCCH, PUSCH, and PDSCH.
  • the present application is only illustratively illustrated here, and more types of signals may be included in actual applications, and the present application does not illustrate one by one here.
  • SSB has the highest priority level, followed by CORESET or CSI-RS, followed by PUCCH, SRS, PUSCH, and finally PDSCH.
  • the priority of the signal may be adjusted, and the priority of the signal corresponding to the information carried by the PUSCH is also different. This application does not specifically limit it here. How to define the priority level of the signal.
  • the communication apparatus 1200 may be applied to the aforementioned terminal device, or may be the aforementioned first communication apparatus, or may be the aforementioned second communication apparatus.
  • the memory 1220 stores necessary computer programs, program instructions and/or data for implementing the functions of the relay device in any of the above-mentioned embodiments.
  • the processor 1210 may execute the computer program stored in the memory 1220 to complete the method in any of the foregoing embodiments.
  • a specific connection medium among the transceiver 1230, the processor 1210, and the memory 1220 is not limited.
  • the memory 1220, the processor 1210, and the transceiver 1230 are connected through a bus.
  • the bus is represented by a thick line in FIG. 12, and the connection between other components is only for schematic illustration. It is not limited.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 12 , but it does not mean that there is only one bus or one type of bus.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising the instruction device, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

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

Abstract

La présente demande se rapporte au domaine de la technologie des communications, et concerne, dans certains modes de réalisation, un procédé de commutation de faisceau et un appareil. Un dispositif terminal détermine S signaux à traiter dans une première unité de temps, au moins deux signaux parmi les S signaux ayant des niveaux de priorité différents, les types de signal des S signaux comprenant un ou plusieurs parmi les éléments suivants : un bloc de signal de synchronisation SSB, un ensemble de ressources de commande CORESET, un signal de référence de sondage SRS, ou un canal partagé de liaison descendante physique PDSCH, et S étant un nombre entier positif supérieur ou égal à deux ; et la commutation de faisceau et la transmission ou la réception de signal sont effectuées dans la première unité de temps selon une règle de commutation de faisceau, la règle de commutation de faisceau étant déterminée en fonction des niveaux de priorité des S signaux. Dans la présente demande, lorsqu'un dispositif terminal effectue une commutation de faisceau à une première unité de temps, des niveaux de priorité de signaux sont référencés, il peut être garanti qu'un type de signal spécifique est reçu ou transmis de manière opportune, la qualité de communication du dispositif terminal peut par conséquent être assurée, et l'efficacité de communication est améliorée.
PCT/CN2022/096811 2021-06-04 2022-06-02 Procédé de commutation de faisceau, et appareil WO2022253308A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190357193A1 (en) * 2018-05-17 2019-11-21 Qualcomm Incorporated Early transmit beam switching
CN111713033A (zh) * 2018-02-16 2020-09-25 高通股份有限公司 用于无线通信的下行链路传输波束配置技术
CN112106422A (zh) * 2018-05-10 2020-12-18 高通股份有限公司 用于保护高优先级码元免受波束切换的影响的方法和系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111713033A (zh) * 2018-02-16 2020-09-25 高通股份有限公司 用于无线通信的下行链路传输波束配置技术
CN112106422A (zh) * 2018-05-10 2020-12-18 高通股份有限公司 用于保护高优先级码元免受波束切换的影响的方法和系统
US20190357193A1 (en) * 2018-05-17 2019-11-21 Qualcomm Incorporated Early transmit beam switching

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