WO2022022103A1 - Procédé et dispositif de transmission d'un signal de référence de sondage apériodique - Google Patents

Procédé et dispositif de transmission d'un signal de référence de sondage apériodique Download PDF

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Publication number
WO2022022103A1
WO2022022103A1 PCT/CN2021/099505 CN2021099505W WO2022022103A1 WO 2022022103 A1 WO2022022103 A1 WO 2022022103A1 CN 2021099505 W CN2021099505 W CN 2021099505W WO 2022022103 A1 WO2022022103 A1 WO 2022022103A1
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WIPO (PCT)
Prior art keywords
time slot
serving cell
user equipment
aperiodic srs
dci
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PCT/CN2021/099505
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English (en)
Chinese (zh)
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沈兴亚
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展讯通信（上海）有限公司
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Publication of WO2022022103A1 publication Critical patent/WO2022022103A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the embodiments of the present application relate to the field of mobile communication technologies, and in particular, to a method and device for sending an aperiodic sounding reference signal (Sounding Reference Signal, SRS for short).
  • SRS Sounding Reference Signal
  • a user equipment In uplink transmission, a user equipment (User Equipment, UE) needs to send an SRS to a network device for the network device to listen to uplink channel state information, thereby implementing functions such as frequency selective scheduling and link adaptation.
  • UE User Equipment
  • a network device may send downlink control information (Downlink Control Indicator, DCI for short) to trigger the UE to send an aperiodic SRS.
  • DCI Downlink Control Indicator
  • the time when the UE sends the aperiodic SRS may collide with the time when the UE receives the PDSCH, thus causing the UE to fail to send the aperiodic SRS.
  • PDSCH Physical Downlink Shared Channel
  • the embodiments of the present application provide a method and device for sending an aperiodic sounding reference signal, which can solve the problem that when one DCI schedules multiple PDSCHs, the time when the UE sends the aperiodic SRS may conflict with the time when the UE receives the PDSCH, thus causing the UE to fail.
  • Technical issues of sending aperiodic SRS can solve the problem that when one DCI schedules multiple PDSCHs, the time when the UE sends the aperiodic SRS may conflict with the time when the UE receives the PDSCH, thus causing the UE to fail.
  • an embodiment of the present application provides a method for sending an aperiodic sounding reference signal, including:
  • the user equipment receives DCI for scheduling at least two PDSCHs and for triggering the user equipment to send aperiodic SRS.
  • the first time slot is determined according to the time slot in which the last PDSCH of the at least two PDSCHs is located.
  • the target time slot for sending the aperiodic SRS is determined according to whether the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are the same serving cell, and the first time slot.
  • the aperiodic SRS is transmitted in the target slot.
  • the target timeslot of the aperiodic SRS includes:
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are not the same serving cell, according to the position of the first time slot, the number of the first time slot interval and the second time slot interval The number of time slot intervals to determine the target time slot.
  • the target time slot is determined.
  • the number of the first time slot intervals is configured by the network device, and the number of the second time slot intervals is determined according to parameters configured by the network device, and the parameters configured by the network device include receiving physical downlink control channels (Physical Downlink Control Channel, PDCCH) the first parameter group of the carrier on which the aperiodic SRS is sent and the second parameter group of the carrier on which the aperiodic SRS is sent; the first parameter group and the second parameter group respectively include the following parameters At least one of: subcarrier spacing, number of time slots.
  • PDCCH Physical Downlink Control Channel
  • the target timeslot of the aperiodic SRS includes:
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are not the same serving cell, according to the position of the first time slot, the number of the first time slot interval and the second time slot interval The number of time slot intervals is determined, the first target time slot is determined, and the first available time slot after the first target time slot is determined as the target time slot.
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are the same serving cell, according to the position of the first time slot and the number of intervals of the first time slot, A second target time slot is determined, and the first available time slot after the second target time slot is determined as the target time slot.
  • the number of the first time slot interval is greater than or equal to the number of time slots occupied by the preparation time required by the user equipment before sending the aperiodic SRS, and the second time slot interval number is based on Determined by the parameters configured by the network device, the parameters configured by the network device include the first parameter group of the carrier where the PDCCH is received and the second parameter group of the carrier where the aperiodic SRS is sent; the first parameter group and the The second parameter group respectively includes at least one of the following parameters: subcarrier spacing, number of time slots.
  • the determining the first time slot according to the time slot where the last PDSCH in the at least two PDSCHs is located includes:
  • the first PDSCH is determined according to the time slot where the last PDSCH of the at least two PDSCHs is located, and the subcarrier spacing of the uplink carrier where the user equipment is located during uplink transmission and the subcarrier spacing of the downlink carrier where the user equipment is located during downlink reception. time slot.
  • the determining the first time slot according to the time slot where the last PDSCH in the at least two PDSCHs is located includes:
  • N is a natural number less than or equal to the number of the first time slot interval.
  • the determining the first time slot according to the time slot where the last PDSCH in the at least two PDSCHs is located includes:
  • the subcarrier spacing is used to determine the first time slot; N is a natural number, and N is less than or equal to the number of PDSCHs scheduled by the DCI.
  • the method further includes:
  • the second time slot is determined according to the position of the time slot where the DCI is located, and the subcarrier spacing of the uplink carrier where the user equipment is located during uplink transmission and the subcarrier spacing of the downlink carrier where the user equipment is located during downlink reception.
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are not the same serving cell, according to the position of the second time slot, the number of first time slot intervals, the second time slot The number of slot intervals and the position of the time slot where the last PDSCH in the at least two PDSCHs is located determine the target time slot.
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are the same serving cell, according to the position of the second time slot, the number of first time slot intervals, and the at least The position of the time slot where the last PDSCH in the two PDSCHs is located determines the target time slot.
  • the number of the first time slot intervals is configured by the network device, and the number of the second time slot intervals is determined according to parameters configured by the network device, and the parameters configured by the network device include the carrier where the PDCCH is received.
  • the method further includes:
  • the second time slot is determined according to the position of the time slot where the DCI is located, and the subcarrier spacing of the uplink carrier where the user equipment is located during uplink transmission and the subcarrier spacing of the downlink carrier where the user equipment is located during downlink reception.
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are not the same serving cell, according to the position of the second time slot, the number of first time slot intervals, the second time slot The number of slot intervals, and the position of the time slot where the last PDSCH in the at least two PDSCHs is located, determine the first target time slot, and determine the first available time slot after the first target time slot as the the target time slot.
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are the same serving cell, according to the position of the second time slot, the number of first time slot intervals, and the at least The position of the time slot where the last PDSCH in the two PDSCHs is located determines the second target time slot, and the first available time slot after the second target time slot is determined as the target time slot.
  • the number of the first time slot interval is greater than or equal to the number of time slots occupied by the preparation time required by the user equipment before sending the aperiodic SRS, and the second time slot interval number is based on Determined by the parameters configured by the network device, the parameters configured by the network device include the first parameter group of the carrier where the PDCCH is received and the second parameter group of the carrier where the aperiodic SRS is sent; the first parameter group and the The second parameter group respectively includes at least one of the following parameters: subcarrier spacing, number of time slots.
  • the target timeslot of the aperiodic SRS includes:
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are not the same serving cell, according to the position of the first time slot, the number of the first time slot interval and the second time slot interval The number of time slot intervals is determined, the first target time slot is determined, and the first available time slot after the first target time slot is determined as the target time slot.
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are the same serving cell, according to the position of the first time slot and the number of intervals of the first time slot, A second target time slot is determined, and the first available time slot after the second target time slot is determined as the target time slot.
  • the number of the first time slot intervals is configured by the network device, and the number of the second time slot intervals is determined according to parameters configured by the network device.
  • the parameters configured by the network device include the location where the PDCCH is received.
  • the first parameter group of the carrier and the second parameter group of the carrier where the aperiodic SRS is sent; the first parameter group and the second parameter group respectively include at least one of the following parameters: subcarrier spacing, time number of gaps.
  • the sending the aperiodic SRS in the target time slot includes:
  • the aperiodic SRS is sent in the target time slot.
  • an embodiment of the present application provides an apparatus for sending an aperiodic sounding reference signal, and the apparatus includes:
  • a receiving module configured to receive downlink control information DCI, where the DCI is used to schedule at least two physical downlink shared channels PDSCH, and to trigger the user equipment to send an aperiodic sounding reference signal SRS.
  • a processing module configured to determine the first time slot according to the time slot where the last PDSCH of the at least two PDSCHs is located.
  • the processing module is further configured to, according to whether the serving cell scheduled by the DCI and the serving cell that the user equipment sends the aperiodic SRS is the same serving cell, and the first time slot, determine whether to send the aperiodic SRS. Target slot for periodic SRS.
  • a sending module configured to send the aperiodic SRS in the target time slot.
  • an embodiment of the present application provides a user equipment, including: at least one processor and a memory; the memory stores computer-executable instructions; the at least one processor executes the computer-executable instructions stored in the memory, so that the At least one processor executes the method for sending an aperiodic sounding reference signal as provided in the first aspect.
  • embodiments of the present application provide a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium.
  • the first PDSCH is determined according to the time slot where the last PDSCH in the at least two PDSCHs is located.
  • the data is obtained by combining the serving cell scheduled by DCI, the serving cell where the user equipment sends aperiodic SRS, and the time slot where the last PDSCH is located in the at least two PDSCHs. Determining the target time slot for sending the aperiodic SRS can effectively avoid conflict between the time when the UE sends the aperiodic SRS and the time when the UE receives the PDSCH, thereby ensuring that the UE can send the aperiodic SRS normally.
  • FIG. 1 is a schematic structural diagram of a wireless communication system provided in an embodiment of the application
  • FIG. 2 is a schematic flowchart 1 of a method for sending an aperiodic sounding reference signal according to an embodiment of the present application
  • FIG. 3 is a second schematic flowchart of a method for sending an aperiodic sounding reference signal according to an embodiment of the present application
  • FIG. 4 is a schematic diagram 1 of a time slot allocation provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram 2 of a time slot allocation provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram 3 of a time slot allocation provided by an embodiment of the present application.
  • FIG. 7 is a third schematic flowchart of a method for sending an aperiodic sounding reference signal according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of program modules of an apparatus for sending an aperiodic sounding reference signal provided in an embodiment of the present application
  • FIG. 9 is a schematic diagram of a hardware structure of a user equipment provided in an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • New Radio, NR evolution system of NR system
  • LTE LTE-based access to unlicensed spectrum, LTE-U
  • NR NR-based access to unlicensed spectrum on unlicensed spectrum, NR-U
  • Universal Mobile Telecommunication System UMTS
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • next-generation communication systems or other communication systems etc.
  • the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.
  • Carrier Aggregation, CA Carrier Aggregation, CA
  • DC Dual Connectivity
  • SA standalone
  • This embodiment of the present application does not limit the applied spectrum.
  • the embodiments of the present application may be applied to licensed spectrum, and may also be applied to unlicensed spectrum.
  • FIG. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present application.
  • the wireless communication system provided in this embodiment includes a UE 101 and a network device 102 .
  • UE101 may refer to various forms of user equipment, access terminals, subscriber units, subscriber stations, mobile stations, mobile stations (mobile stations, MS for short), remote stations, remote terminals, mobile equipment, terminal equipment ( terminal equipment), wireless communication equipment, user agent or user equipment.
  • It can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or in future evolved Public Land Mobile Networks (PLMN)
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • PLMN Public Land Mobile Networks
  • the embodiments of this application define the unidirectional communication link from the access network to the UE as the downlink, the data transmitted on the downlink is the downlink data, and the transmission direction of the downlink data is called the downlink direction;
  • the unidirectional communication link is the uplink, the data transmitted on the uplink is the uplink data, and the transmission direction of the uplink data is called the uplink direction.
  • the network device 102 is a public mobile communication network device, which is an interface device for the UE 101 to access the Internet, and is also a form of a radio station.
  • a radio transceiver station including a Base Station (BS for short), also known as base station equipment, is a device deployed in a Radio Access Network (RAN) to provide wireless communication functions.
  • BS Base Station
  • RAN Radio Access Network
  • devices that provide base station functions in 2G networks include Base Transceiver Stations (BTS for short), devices that provide base station functions in 3G networks include Node Bs (NodeBs), and devices that provide base station functions in 4G networks include evolved In the wireless local area network (Wireless Local Area Networks, referred to as WLAN), the device that provides the base station function is the access point (Access Point, referred to as AP), and in 5G NR, the device that provides the base station function
  • the device gNB, and the continuously evolved Node B (ng-eNB) wherein the NR technology is used for communication between the gNB and the UE, and the Evolved Universal Terrestrial Radio Access (Evolved Universal Terrestrial Radio Access) is used between the ng-eNB and the UE.
  • the network device 102 in the embodiment of the present application also includes a device that provides a base station function in a new communication system in the future, and the like.
  • the network device 102 may send downlink scheduling information (DL Grant) to the UE 101 through downlink control information (Downlink Control Information, DCI for short), indicating PDSCH transmission, so that the UE 101 receives data.
  • DCI Downlink Control Information
  • the same DCI may include scheduling information of at least two PDSCHs.
  • the above DCI can also trigger the UE 101 to send an aperiodic SRS.
  • the detection of the uplink channel is completed by a sounding (detection) signal.
  • the base station can obtain uplink channel information, so as to perform resource scheduling and measurement of uplink transmission.
  • the SRS in the LTE/NR system can be sent periodically, that is, the terminal device will continue to send the sounding signal at a certain period until it enters a state of no data transmission.
  • the parameters of the periodic SRS are configured by the high layer, including the CS (Cycle Shift, cyclic shift) of the SRS, bandwidth, frequency hopping parameters, period, and transmission subframe position.
  • aperiodic SRS transmission is introduced into the LTE-A/NR system. Different from periodic SRS, aperiodic SRS is dynamically activated by the base station. Once activated, the user equipment will only send a one-time sounding signal instead of periodically sending signals. Through the aperiodic sounding signal, the base station can obtain the required channel information more flexibly, and close or reduce the transmission of the periodic SRS when conditions permit, thereby reducing the physical resource overhead of the SRS.
  • the time at which the UE sends the aperiodic SRS may collide with the time at which the UE receives the PDSCH, thereby causing the UE to fail to send the aperiodic SRS.
  • an embodiment of the present application provides a method for sending an aperiodic sounding reference signal.
  • the DCI is used to schedule at least two PDSCHs
  • the serving cell and user equipment scheduled by the DCI are combined to send the service of the aperiodic SRS.
  • the target time slot for sending the aperiodic SRS is determined by determining the target time slot for sending the aperiodic SRS by using the cell and the time slot where the last PDSCH of the at least two PDSCHs is located, which can effectively avoid conflict between the time when the UE sends the aperiodic SRS and the time when the UE receives the PDSCH.
  • FIG. 2 is a schematic flowchart 1 of a method for sending an aperiodic sounding reference signal according to an embodiment of the present application.
  • the execution body of this embodiment is the UE in the embodiment shown in FIG. 1 .
  • the method includes:
  • the user equipment receives DCI, where the DCI is used for scheduling at least two PDSCHs and for triggering the user equipment to send an aperiodic SRS.
  • the user equipment after receiving the DCI sent by the network device, the user equipment parses the downlink scheduling information included in the DCI, and determines the PDSCH scheduled by the DCI.
  • the DCI includes the scheduling information of two or more PDSCHs , and continue to perform the following steps S202 to S204; when the DCI only includes scheduling information of one PDSCH, the user equipment can send the aperiodic SRS according to the time slot indicated by the network device.
  • the PDSCH is a type of physical downlink channel in a wireless communication system, and is used to transmit downlink user data.
  • the base station needs to designate and allocate time domain resources and frequency domain resources to the downlink data before data transmission can be performed on the PDSCH.
  • the position of each PDSCH in the time domain may be determined according to the start symbol and symbol length of each PDSCH in the above at least two PDSCHs in the time domain, and then the last PDSCH is determined from the above at least two PDSCHs The location where the PDSCH is located, and the slot where the last PDSCH is located.
  • the first time slot can be determined according to the time slot, and the first time slot can be the time slot where the last PDSCH of the at least two PDSCHs is located.
  • N is a natural number greater than 0.
  • S203 Determine the target time slot for sending the aperiodic SRS according to whether the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are the same serving cell, and the first time slot.
  • the first time slot after the first time slot is determined, it is detected whether the serving cell scheduled by DCI and the serving cell where the user equipment sends aperiodic SRS are the same serving cell, and then according to the detection result and the first time slot , determine the target time slot for sending aperiodic SRS.
  • the target time slot may be the mth time slot (m is a natural number greater than 0) after the time slot where the last PDSCH of the at least two PDSCHs is located.
  • the target time slot may be the first available time slot after the time slot in which the last PDSCH of the at least two PDSCHs is located.
  • the serving cell scheduled by DCI, the serving cell where user equipment sends aperiodic SRS, and the above at least two PDSCHs are combined
  • the target time slot for sending aperiodic SRS is determined by the time slot where the last PDSCH is located, which can effectively avoid the conflict between the time when the UE sends the aperiodic SRS and the time when the UE receives the PDSCH, so as to ensure that the UE can send the aperiodic SRS normally.
  • FIG. 3 is a second schematic flowchart of a method for sending an aperiodic sounding reference signal provided by an embodiment of the present application.
  • the method for sending aperiodic sounding reference signals includes:
  • the user equipment receives DCI, where the DCI is used for scheduling at least two PDSCHs and for triggering the user equipment to send an aperiodic SRS.
  • S302. Determine the first time slot according to the time slot where the last PDSCH of the at least two PDSCHs is located.
  • step S303 Detect whether the serving cell scheduled by the DCI is the same as the serving cell where the user equipment sends the aperiodic SRS. If no, go to step S304; if yes, go to step S305.
  • step S304 Determine the target time slot according to the position of the first time slot, and the number of intervals of the first time slot and the number of intervals of the second time slot. Continue to execute step S306.
  • step S305 Determine the target time slot according to the position of the first time slot and the number of intervals of the first time slot. Continue to execute step S306.
  • the number of the above-mentioned first time slot intervals is configured by the network device, and the above-mentioned number of the second time slot intervals is determined according to parameters configured by the network device, and the parameters include the first parameter group of the carrier where the PDCCH is received and the transmission
  • the above-mentioned target time slot Ks may be determined in the following manner:
  • the above target time slot Ks can be determined in the following manner:
  • ⁇ SRS represents the subcarrier spacing of the uplink carrier where the user equipment transmits aperiodic SRS in uplink
  • ⁇ PDCCH represents the subcarrier spacing of the downlink carrier where the user equipment downlink receives PDCCH.
  • k represents the number of the first time slot interval, which is configured by the network device through radio resource control (Radio Resource Control, RRC) signaling.
  • RRC Radio Resource Control
  • the first parameter group of the carrier where the PDCCH is received includes ⁇ offset, PDCCH (representing the subcarrier spacing of the carrier where the PDCCH is received), (indicates the number of time slots of the carrier on which the PDCCH is received or the time domain parameters of the carrier on which the PDCCH is received);
  • the second parameter group of the carrier on which the aperiodic SRS is sent includes: (indicates the subcarrier spacing of the carrier where the aperiodic SRS is sent), (Indicates the number of time slots of the carrier on which the aperiodic SRS is sent or the time domain parameter of the carrier on which the aperiodic SRS is sent).
  • n represents the position of the time slot where the last PDSCH of the at least two PDSCHs is located.
  • FIG. 4 is a schematic diagram of time slot allocation provided by an embodiment of the present application.
  • the target slot for SRS is slot 5.
  • n represents the position of the Nth time slot after the time slot where the last PDSCH of the at least two PDSCHs is located, and N is a natural number less than or equal to the number of first time slot intervals.
  • FIG. 5 is a second schematic diagram of time slot allocation provided by an embodiment of the present application.
  • n represents the position of the Nth time slot before the time slot where the last PDSCH in the above at least two PDSCHs is located, N is a natural number, and N is less than or equal to the number of PDSCHs scheduled by DCI number.
  • FIG. 6 is a schematic diagram 3 of a time slot allocation provided by an embodiment of the present application.
  • the serving cell scheduled by DCI and the serving cell where user equipment transmits aperiodic SRSs are combined with the above at least two PDSCHs.
  • the mth (m is a natural number greater than 0) time slot after the time slot where the last PDSCH is located in the middle of the group is used to send the aperiodic SRS, which can effectively avoid the time when the UE sends the aperiodic SRS and the time when the UE receives the PDSCH.
  • mth m is a natural number greater than 0
  • FIG. 7 is a schematic flowchart of a third method for sending an aperiodic sounding reference signal provided by an embodiment of the present application.
  • the method for sending aperiodic sounding reference signals includes:
  • the user equipment receives DCI, where the DCI is used for scheduling at least two PDSCHs and for triggering the user equipment to send an aperiodic SRS.
  • S702 Determine the first time slot according to the time slot where the last PDSCH of the at least two PDSCHs is located.
  • step S703. Detect whether the serving cell scheduled by the DCI is the same as the serving cell where the user equipment sends the aperiodic SRS. If no, go to step S704; if yes, go to step S705.
  • step S704. Determine the first target time slot according to the position of the first time slot, and the number of intervals between the first time slot and the second time slot, and determine the first available time slot after the first target time slot is the target time slot. Continue to step S706.
  • step S705. Determine the second target time slot according to the position of the first time slot and the number of intervals of the first time slot, and determine the first available time slot after the second target time slot as the target time slot. Continue to step S706.
  • the above-mentioned available time slot represents a time slot that can be used to transmit aperiodic SRS.
  • the time slot where the last PDSCH in the above-mentioned at least two PDSCHs is located is the time slot after the above-mentioned first target time slot or the second target time slot. The interval between the first available time slots satisfies the processing capability of the user equipment.
  • the number of the above-mentioned first time slot intervals is greater than or equal to the number of time slots occupied by the preparation time required by the user equipment before sending the aperiodic SRS, and the above-mentioned number of the second time slot intervals is based on definite.
  • the above-mentioned target time slot may be the first one after the first target time slot Ks available time slots.
  • the first target time slot Ks can be determined in the following manner:
  • the above target time slot may be the first available time slot after the second target time slot Ks', where the second target time slot Ks'
  • the time slot Ks' can be determined by:
  • k represents the number of the above-mentioned first time slot interval, which is determined according to the switching time required for uplink and downlink transmission on the user equipment side and/or the preparation time for the user equipment to send SRS.
  • n represents the position of the time slot where the last PDSCH of the at least two PDSCHs is located.
  • n represents the position of the Nth time slot after the time slot where the last PDSCH of the at least two PDSCHs is located, and N is a natural number less than or equal to the number of first time slot intervals.
  • n represents the position of the Nth time slot before the time slot where the last PDSCH in the above at least two PDSCHs is located, N is a natural number, and N is less than or equal to the number of PDSCHs scheduled by DCI number.
  • the serving cell scheduled by DCI and the serving cell where user equipment transmits aperiodic SRSs are combined with the above at least two PDSCHs.
  • the aperiodic SRS can be sent in the first available time slot after the time slot where the last PDSCH is located, which can effectively avoid the conflict between the time when the UE sends the aperiodic SRS and the time when the UE receives the PDSCH, so as to ensure that the UE can send non-periodic SRS normally.
  • the foregoing method for sending aperiodic sounding reference signals includes:
  • the above target time slot may be the first available time slot after the first target time slot Ks.
  • the first target time slot Ks can be determined in the following manner:
  • the above target time slot may be the first available time slot after the second target time slot Ks', where the second target time slot Ks'
  • the time slot Ks' can be determined by:
  • k represents the number of the above-mentioned first time slot interval, which is configured by the network device through RRC signaling.
  • n represents the position of the time slot in which the last PDSCH of the at least two PDSCHs is located.
  • the aperiodic SRS is sent in the target time slot, and the PDSCH is not received; thus, it can be avoided that the time when the UE sends the aperiodic SRS is different from the time when the UE receives the PDSCH.
  • the UE cannot send aperiodic SRS.
  • the PDSCH is received in the target time slot, and the aperiodic SRS is not sent, thereby avoiding the time when the UE sends the aperiodic SRS and the UE.
  • FIG. 8 is an aperiodic sounding reference signal provided by an embodiment of the present application.
  • the apparatus 80 for sending the aperiodic sounding reference signal includes:
  • the receiving module 801 is configured to receive downlink control information DCI, where the DCI is used to schedule at least two PDSCHs and to trigger the user equipment to send aperiodic SRS.
  • the processing module 802 is configured to determine the first time slot according to the time slot where the last PDSCH in the above at least two PDSCHs is located; whether the serving cell scheduled according to the DCI and the serving cell that the user equipment sends the aperiodic SRS are the same serving cell, and the above-mentioned first time slot, determine the target time slot for transmitting the aperiodic SRS.
  • the sending module 803 is configured to send the aperiodic SRS in the target time slot.
  • the apparatus 80 for sending an aperiodic sounding reference signal provided by the embodiment of the present application, when the DCI is used to schedule at least two PDSCHs, the serving cell scheduled by the DCI, the serving cell where the user equipment sends the aperiodic SRS, and the above at least two
  • the time slot of the last PDSCH in the PDSCH is used to determine the target time slot for sending aperiodic SRS, which can effectively avoid the conflict between the time when the UE sends the aperiodic SRS and the time when the UE receives the PDSCH, so as to ensure that the UE can send the aperiodic SRS normally. .
  • processing module 802 is specifically used for:
  • the serving cell scheduled by the DCI and the serving cell that the user equipment sends the aperiodic SRS are not the same serving cell, according to the position of the first time slot, the number of the first time slot interval and the number of the second time slot interval, determine target slot.
  • the target time slot is determined according to the position of the first time slot and the number of intervals of the first time slot;
  • the number of first time slot intervals is configured by the network device, and the number of second time slot intervals is determined according to parameters configured by the network device.
  • the parameters configured by the network device include the first parameter group of the carrier where the PDCCH is received and the The second parameter group of the carrier where the aperiodic SRS is sent; the first parameter group and the second parameter group respectively include at least one of the following parameters: subcarrier interval, number of time slots.
  • processing module 802 is specifically used for:
  • the serving cell scheduled by the DCI and the serving cell that the user equipment sends the aperiodic SRS are not the same serving cell, according to the position of the first time slot, the number of the first time slot interval and the number of the second time slot interval, determine The first target time slot, and the first available time slot after the first target time slot is determined as the target time slot; when the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are the same serving cell, According to the position of the first time slot and the number of intervals of the first time slot, the second target time slot is determined, and the first available time slot after the second target time slot is determined as the target time slot.
  • the number of first time slot intervals is greater than or equal to the number of time slots occupied by the preparation time required by the user equipment before sending the aperiodic SRS, and the number of second time slot intervals is determined according to parameters configured by the network device.
  • processing module 802 is further configured to:
  • the first time slot is determined according to the time slot where the last PDSCH of the at least two PDSCHs is located, the subcarrier spacing of the uplink carrier where the user equipment is located during uplink transmission and the subcarrier spacing of the downlink carrier where the user equipment is located during downlink reception.
  • processing module 802 is further configured to:
  • N is a natural number less than or equal to the number of intervals of the first time slot.
  • processing module 802 is further configured to:
  • N is a natural number, and N is less than or equal to the number of PDSCHs scheduled by DCI.
  • processing module 802 is further configured to:
  • the serving cell scheduled by DCI and the serving cell where the user equipment sends aperiodic SRS are not the same serving cell, according to the position of the second time slot, the number of first time slot intervals, the number of second time slot intervals, and the above at least The position of the time slot where the last PDSCH in the two PDSCHs is located to determine the target time slot;
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are the same serving cell, according to the position of the second time slot, the number of the first time slot interval, and the last of the at least two PDSCHs The position of the time slot where a PDSCH is located to determine the target time slot;
  • the number of first time slot intervals is configured by the network device, and the number of second time slot intervals is determined according to parameters configured by the network device.
  • the parameters configured by the network device include the first parameter group of the carrier where the PDCCH is received and the The second parameter group of the carrier where the aperiodic SRS is sent; the first parameter group and the second parameter group respectively include at least one of the following parameters: subcarrier spacing, number of time slots.
  • processing module 802 is further configured to:
  • the serving cell scheduled by DCI and the serving cell where the user equipment sends aperiodic SRS are not the same serving cell, according to the position of the second time slot, the number of first time slot intervals, the number of second time slot intervals, and the above at least The position of the time slot where the last PDSCH in the two PDSCHs is located, the first target time slot is determined, and the first available time slot after the first target time slot is determined as the target time slot;
  • the serving cell scheduled by the DCI and the serving cell that the user equipment sends the aperiodic SRS are the same serving cell, according to the position of the second time slot, the number of the first time slot interval, and the last PDSCH among the at least two PDSCHs
  • the position of the time slot where it is located, the second target time slot is determined, and the first available time slot after the second target time slot is determined as the target time slot;
  • the number of the first time slot interval is greater than or equal to the number of time slots occupied by the preparation time required by the user equipment before sending the aperiodic SRS, and the number of the second time slot interval is determined according to the parameters configured by the network device of.
  • processing module 802 is further configured to:
  • the serving cell scheduled by the DCI and the serving cell where the user equipment sends the aperiodic SRS are not the same serving cell, according to the position of the first time slot, and the number of the first time slot interval and the number of the second time slot interval, determining the first target time slot, and determining the first available time slot after the first target time slot as the target time slot;
  • the second target time slot is determined according to the position of the first time slot and the number of intervals of the first time slot, and the The first available time slot after the two target time slots is determined as the target time slot;
  • the number of first time slot intervals is configured by the network device, and the number of second time slot intervals is determined according to parameters configured by the network device.
  • the sending module 803 is also used for:
  • the aperiodic SRS is sent in the target time slot.
  • the device 80 for sending the aperiodic sounding reference signal may be a chip or a chip module or the like.
  • modules included in the apparatus 80 for sending aperiodic sounding reference signals described in the foregoing embodiments may be software modules or hardware modules, or may be partly software modules and partly hardware modules.
  • each module contained therein may be implemented by hardware such as circuits, or at least some of the modules may be implemented by a software program that runs inside the chip
  • the remaining (if any) modules can be implemented by hardware such as circuits; for each device and product applied to or integrated in the chip module, each module contained therein can be implemented by hardware such as circuits.
  • different modules may be located in the same component (such as chip, circuit module, etc.) or different components of the chip module, or, at least some modules may be implemented in the form of software programs that run on the processing integrated inside the chip module
  • the remaining (if any) modules can be implemented by hardware such as circuits; for each device and product applied to or integrated in the terminal, the modules included can be implemented by hardware such as circuits, and different modules can be located in the terminal.
  • the software program runs on the processor integrated inside the terminal, and the remaining (if any) part of the modules can be It is realized by hardware such as circuit.
  • an embodiment of the present application further provides a user equipment, the user equipment includes at least one processor and a memory; wherein, the memory stores computer execution instructions; the above-mentioned at least one processor The computer-executed instructions stored in the memory are executed to implement the content described in each embodiment of the above-mentioned method for sending an aperiodic sounding reference signal.
  • FIG. 9 is a schematic diagram of a hardware structure of a user equipment according to an embodiment of the present application.
  • the user equipment 90 in this embodiment includes: a processor 901 and a memory 902; wherein
  • a memory 902 for storing computer-executed instructions
  • the processor 901 is configured to execute computer-executed instructions stored in the memory to implement various steps performed by the user equipment in the foregoing embodiments. For details, reference may be made to the relevant descriptions in the foregoing method embodiments.
  • the memory 902 may be independent or integrated with the processor 901 .
  • the device When the memory 902 is set independently, the device further includes a bus 903 for connecting the memory 902 and the processor 901 .
  • the embodiments of the present application further provide a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the processor executes the computer-executable instructions , to implement each step performed by the user equipment in the above embodiment.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are only illustrative.
  • the division of the modules is only a logical function division. In actual implementation, there may be other division methods.
  • multiple modules may be combined or integrated. to another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or modules, and may be in electrical, mechanical or other forms.
  • modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional module in each embodiment of the present application may be integrated in one processing unit, or each module may exist physically alone, or two or more modules may be integrated in one unit.
  • the units formed by the above modules can be implemented in the form of hardware, or can be implemented in the form of hardware plus software functional units.
  • the above-mentioned integrated modules implemented in the form of software functional modules may be stored in a computer-readable storage medium.
  • the above-mentioned software function modules are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to execute the various embodiments of the present application. part of the method.
  • processor may be a central processing unit (English: Central Processing Unit, referred to as: CPU), or other general-purpose processors, digital signal processors (English: Digital Signal Processor, referred to as: DSP), application-specific integrated circuits (English: Application Specific Integrated Circuit, referred to as: ASIC) and so on.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the application can be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the memory may include high-speed RAM memory, and may also include non-volatile storage NVM, such as at least one magnetic disk memory, and may also be a U disk, a removable hard disk, a read-only memory, a magnetic disk or an optical disk, and the like.
  • NVM non-volatile storage
  • the bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, or the like.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus and so on.
  • the buses in the drawings of the present application are not limited to only one bus or one type of bus.
  • the above-mentioned storage medium may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable Except programmable read only memory (EPROM), programmable read only memory (PROM), read only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read only memory
  • EPROM erasable except programmable read only memory
  • PROM programmable read only memory
  • ROM read only memory
  • magnetic memory flash memory
  • flash memory magnetic disk or optical disk.
  • a storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.
  • An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium may be located in application specific integrated circuits (Application Specific Integrated Circuits, ASIC for short).
  • ASIC Application Specific Integrated Circuits
  • the processor and the storage medium may also exist in the electronic device or the host device as discrete components.

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

Abstract

Les modes de réalisation de la présente demande concernent un procédé et un dispositif permettant de transmettre un signal de référence de sondage apériodique, ledit procédé consistant à : lorsque des DCI reçues par un UE sont utilisées pour planifier au moins deux PDSCH, déterminer un premier intervalle de temps d'après l'intervalle de temps dans lequel se situe le dernier PDSCH parmi les au moins deux PDSCH ; et selon que la cellule de desserte planifiée par les DCI et la cellule de desserte permettant à l'UE de transmettre un SRS apériodique sont la même cellule de desserte et le premier intervalle de temps, déterminer un intervalle de temps cible pour la transmission du SRS apériodique ; puis transmettre le SRS apériodique dans l'intervalle de temps cible. Dans les modes de réalisation de la présente demande, lorsque les DCI sont utilisées pour planifier au moins deux PDSCH, le conflit entre le moment où l'UE transmet le SRS apériodique et le moment où l'UE reçoit le PDSCH peut être efficacement évité, ce qui garantit la possibilité pour l'UE de transmettre le SRS apériodique de manière normale.
PCT/CN2021/099505 2020-07-31 2021-06-10 Procédé et dispositif de transmission d'un signal de référence de sondage apériodique WO2022022103A1 (fr)

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