WO2022061891A1 - Procédé de transmission répétitive, dispositif de communication et support d'enregistrement - Google Patents

Procédé de transmission répétitive, dispositif de communication et support d'enregistrement Download PDF

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Publication number
WO2022061891A1
WO2022061891A1 PCT/CN2020/118413 CN2020118413W WO2022061891A1 WO 2022061891 A1 WO2022061891 A1 WO 2022061891A1 CN 2020118413 W CN2020118413 W CN 2020118413W WO 2022061891 A1 WO2022061891 A1 WO 2022061891A1
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Prior art keywords
transmission
time slot
communication device
repeated transmission
repeated
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PCT/CN2020/118413
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English (en)
Chinese (zh)
Inventor
左志松
崔胜江
徐伟杰
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2020/118413 priority Critical patent/WO2022061891A1/fr
Priority to CN202080102933.5A priority patent/CN115836501A/zh
Publication of WO2022061891A1 publication Critical patent/WO2022061891A1/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

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a repeated transmission method, a communication device, and a storage medium.
  • Embodiments of the present application provide a method for repeated transmission, a communication device, and a storage medium, which can improve the efficiency of repeated data transmission.
  • an embodiment of the present application provides a method for repeated transmission, including: a communication device determines a time slot for repeated transmission according to first information; the first information includes at least one of the following: a transmission repetition value, a scheduling The time domain offset between the repeatedly transmitted downlink control information (Downlink control information, DCI) and the initial transmission signal scheduled by the DCI, and the slot format (slot format).
  • first information includes at least one of the following: a transmission repetition value, a scheduling The time domain offset between the repeatedly transmitted downlink control information (Downlink control information, DCI) and the initial transmission signal scheduled by the DCI, and the slot format (slot format).
  • an embodiment of the present application provides a communication device, where the communication device includes: a processing unit configured to determine a time slot for repeated transmission according to first information; the first information includes at least one of the following:
  • an embodiment of the present application provides a communication device, including a processor and a memory for storing a computer program that can be executed on the processor, wherein the processor is configured to execute the above communication when the computer program is executed The steps of the repeated transmission method performed by the device.
  • an embodiment of the present application provides a chip, including: a processor for calling and running a computer program from a memory, so that a device installed with the chip executes the repeated transmission method executed by the communication device.
  • an embodiment of the present application provides a storage medium that stores an executable program, and when the executable program is executed by a processor, implements the repeated transmission method performed by the above communication device.
  • an embodiment of the present application provides a computer program product, including computer program instructions, the computer program instructions cause a computer to execute the repeated transmission method executed by the above communication device.
  • an embodiment of the present application provides a computer program, the computer program causing a computer to execute the repeated transmission method executed by the above communication device.
  • the repeated transmission method, communication device, and storage medium provided by the embodiments of the present application include: the communication device determines a time slot for repeated transmission according to first information; the first information includes at least one of the following: transmission repetition value, scheduling Timing information and slot structure of DCI.
  • the available time slots for repeated transmission can be specified according to the time slot structure, which solves the problem of repeated transmission coverage of physical uplink shared channel (PUSCH) and/or physical downlink shared channel (PDSCH) data.
  • PUSCH physical uplink shared channel
  • PDSCH physical downlink shared channel
  • FIG. 1 is a schematic diagram of a flexible time slot structure according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of repeated transmission for a flexible time slot structure according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of a composition structure of a communication system provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an optional processing flow of the repeated transmission method provided by the embodiment of the present application.
  • FIG. 5 is a schematic diagram of a network device scheduling PUSCH through DCI according to an embodiment of the present application
  • FIG. 6 is a schematic diagram of a network device scheduling PDSCH through DCI according to an embodiment of the present application
  • FIG. 7 is a schematic diagram of a terminal device transmitting HARQ-ACK feedback corresponding to a PDSCH according to an embodiment of the present application
  • FIG. 8 is a schematic structural diagram of an optional composition of a communication device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a hardware composition of a communication device provided by an embodiment of the present application.
  • New Radio (NR) systems have better performance indicators than Long Term Evolution (Long Term Evolution, LTE) systems, such as data transmission rate, spectrum utilization, delay, connection density and power consumption.
  • LTE Long Term Evolution
  • the NR system has good forward compatibility and can support the introduction of other enhancement technologies or new access technologies in the future. Therefore, the concepts of self-contained slots and flexible slots are introduced in NR systems.
  • a flexible slot includes downlink symbols (DL), flexible symbols (Flexible) and uplink symbols (UL) in one slot; the flexible symbols can be used as guard symbols or guard intervals for uplink and downlink transition time.
  • a variety of flexible time slot structures are defined, including all downlink time slots, all uplink time slots, all flexible time slots, and time slot structures with different numbers of downlink symbols, uplink symbols and flexible symbols; different
  • the time slot structure corresponds to a time slot format index respectively, and one time slot may include one or two switching points of uplink and downlink.
  • time slot (a) includes 7 downlink symbols, 2 uplink symbols and 3 flexible symbols; time slot (b) includes 2 downlink symbols, 8 uplink symbols symbol and 3 flexible symbols; time slot (c) includes 10 downstream symbols, 2 upstream symbols and 2 flexible symbols; time slot (d) includes 4 downstream symbols, 6 upstream symbols and 4 flexible symbols .
  • the NR system can aggregate multi-slot Physical Uplink Shared Channel (PUSCH) and Physical Downlink Shared Channel (PDSCH) data transmission through the uplink and downlink transmission repetition value (Aggregation factor);
  • PUSCH Physical Uplink Shared Channel
  • PDSCH Physical Downlink Shared Channel
  • Aggregation factor The data transmission of the slot can improve the coverage of a single transmission of the NR system.
  • the schematic diagram of repeated transmission for the flexible time slot structure includes 4 repeated transmissions, namely Repetition0, Repetition1, Repetition2 and Repetition3; among which, there is no actual data transmission in Repetition1 and Repetition2, and Slot0 corresponding to Repetition0 and Repetition3 is only Uplink transmission is possible; the time slot corresponding to Repetition1 can only perform downlink transmission; 9 symbols in the time slot corresponding to Repetition2 can be used for downlink transmission, 2 symbols can be used for uplink transmission, and 2 symbols belong to undetermined symbols or guard intervals.
  • the number of repeated transmissions is usually semi-statically configured, and the repeated transmission of PUSCH covers consecutive time slots. Therefore, when the available symbols in the time slot do not meet the requirements, if uplink repeated transmission is required, the available symbols in the time slot are only If downlink transmission can be performed, but uplink transmission cannot be performed, the repeated transmission of the time slot is ignored, that is, the repeated transmission of the time slot is not performed.
  • the configured repeated transmission times cannot achieve the desired coverage enhancement effect. Due to the limitation of the actual frame structure, a large number of repeated transmissions is configured in time, which will also result in no effect of repetition between multiple time slots. In this way, the coverage restriction of the TDD system is too large, which affects the deployment efficiency of the TDD system.
  • the FDD system configured with the flexible frame structure also has the above problems.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE system LTE frequency division duplex (frequency division duplex, FDD) system
  • LTE time division duplex time division duplex, TDD
  • LTE-A advanced long term evolution
  • NR system evolution system of NR system
  • LTE-based access to unlicensed spectrum LTE-U
  • NR-based access to unlicensed spectrum, NR-U system on unlicensed frequency band
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • WiMAX wireless local area networks
  • WLAN wireless local area networks
  • WiFi next-generation communication systems or other communication systems.
  • the network equipment involved in the embodiments of this application may be a common base station (such as a NodeB or eNB or gNB), a new radio controller (NR controller), a centralized network element (centralized unit), a new radio base station, Remote radio module, micro base station, relay, distributed unit (distributed unit), reception point (transmission reception point, TRP), transmission point (transmission point, TP) or any other equipment.
  • a common base station such as a NodeB or eNB or gNB
  • NR controller new radio controller
  • a centralized network element centralized unit
  • a new radio base station Remote radio module
  • micro base station relay, distributed unit (distributed unit)
  • reception point transmission reception point
  • TRP transmission point
  • TP transmission point
  • the terminal device may be any terminal, for example, the terminal device may be user equipment of machine type communication. That is to say, the terminal device can also be called user equipment UE, mobile station (mobile station, MS), mobile terminal (mobile terminal), terminal (terminal), etc. network, RAN) to communicate with one or more core networks, for example, the terminal device may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, etc., for example, the terminal device may also be a portable, pocket-sized , handheld, computer built-in or vehicle mounted mobile devices that exchange language and/or data with the radio access network.
  • the terminal device may be any terminal, for example, the terminal device may be user equipment of machine type communication. That is to say, the terminal device can also be called user equipment UE, mobile station (mobile station, MS), mobile terminal (mobile terminal), terminal (terminal), etc. network, RAN) to communicate with one or more core networks, for example, the terminal device may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, etc
  • network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and artificial satellites in the air.
  • the embodiments of the present application do not limit the application scenarios of the network device and the terminal device.
  • communication between the network device and the terminal device and between the terminal device and the terminal device can be performed through licensed spectrum (licensed spectrum), or through unlicensed spectrum (unlicensed spectrum), or both through licensed spectrum and unlicensed spectrum for communications.
  • Communication between network equipment and terminal equipment and between terminal equipment and terminal equipment can be carried out through the spectrum below 7 gigahertz (GHz), or through the frequency spectrum above 7 GHz, and can also use the frequency spectrum below 7 GHz and the frequency spectrum at the same time.
  • the spectrum above 7GHz is used for communication.
  • the embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.
  • D2D device to device
  • M2M machine to machine
  • MTC machine type communication
  • V2V vehicle to vehicle
  • the communication system 100 applied in this embodiment of the present application is as shown in FIG. 3 .
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal).
  • the network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device can be a mobile switching center, relay station, access point, in-vehicle equipment, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolved Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B, eNB or eNodeB
  • CRAN Cloud Radio Access Network
  • the network device can be a mobile switching center, relay station, access point, in-vehicle equipment, Wearable devices, hub
  • the communication system 100 also includes at least one terminal device 120 located within the coverage area of the network device 110.
  • terminal equipment includes, but is not limited to, connections via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connections and/or another data connection/network; and/or via a wireless interface, e.g. for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM- An FM broadcast transmitter; and/or a device of another terminal device configured to receive/transmit communication signals; and/or an Internet of Things (IoT) device.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Line
  • WLAN Wireless Local Area Networks
  • DVB-H Digital Video Broadband
  • satellite networks satellite networks
  • AM- An FM broadcast transmitter AM- An FM broadcast transmitter
  • IoT Internet of Things
  • a terminal device arranged to communicate via a wireless interface may be referred to as a "wireless communication terminal", “wireless terminal” or “mobile terminal”.
  • mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communication capabilities; may include radio telephones, pagers, Internet/Intranet PDAs with networking access, web browsers, memo pads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or others including radiotelephone transceivers electronic device.
  • PCS Personal Communications System
  • GPS Global Positioning System
  • Terminal equipment may refer to an access terminal, user equipment (UE), subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.
  • the access terminal may 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 5G networks or in future evolved PLMNs, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • direct terminal (Device to Device, D2D) communication may be performed between the terminal devices 120 .
  • the 5G system or 5G network may also be referred to as an NR system or an NR network.
  • FIG. 3 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. This application The embodiment does not limit this.
  • the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • a device having a communication function in the network/system may be referred to as a communication device.
  • the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobility management entity, etc., which are not limited in this embodiment of the present application.
  • An optional processing flow of the repeated transmission method provided by the embodiment of the present application, as shown in FIG. 4 includes the following steps:
  • Step S201 the communication device determines a time slot for repeated transmission according to first information, where the first information includes at least one of the following: a transmission repetition value, a DCI for scheduling the repeated transmission, and an initial transmission signal for the DCI scheduling time-domain offset, and slot format.
  • first information includes at least one of the following: a transmission repetition value, a DCI for scheduling the repeated transmission, and an initial transmission signal for the DCI scheduling time-domain offset, and slot format.
  • the communication device may be a terminal device or a network device; the repeated transmission may be uplink repeated transmission, that is, repeated transmission of data sent by the terminal device to the network device; the repeated transmission may also be It is the downlink repeated transmission, that is, the repeated transmission of the data sent by the network device to the terminal device.
  • the slot format may refer to the direction of OFDM symbols within a slot.
  • the direction of the OFDM symbol may refer to the direction of the signal carried by the OFDM symbol. If the signal carried by the OFDM symbol is an uplink signal, the direction of the OFDM symbol is the uplink; if the signal carried by the OFDM symbol is a downlink signal, then The direction of the OFDM symbol is downlink.
  • the transmission repetition value may be the maximum number of repeated transmissions, and the transmission repetition value may be configured by the network device to the terminal device through RRC signaling.
  • the time domain offset between the DCI scheduling the repeated transmission and the initial transmission signal scheduled by the DCI may be indicated by the DCI sent by the network device, and the time domain offset may include one or more of the following: If the initial transmission signal includes PUSCH, the time domain offset includes the time slot offset between the DCI and the PUSCH; if the initial transmission signal includes PDSCH, the time domain offset includes the time slot offset between the DCI and the PUSCH. the time domain offset between the DCI and the PDSCH.
  • the initial transmission signal scheduled by DCI may be an uplink signal, a downlink signal, or an uplink signal and a downlink signal; for example, the DCI may schedule PDSCH, or PUCCH, or PUSCH.
  • the following describes the determination of the time slot for repeated transmission by the communication device according to the first information for different scenarios.
  • the initial transmission signal scheduled by DCI is PUSCH, and the communication device determines the time slot of the i-th repeated transmission according to the time domain offset between DCI and the PUSCH; wherein, i is greater than or equal to 0, and i is less than the transmission repetition value.
  • the communication device uses the time slot indicated by the time domain offset as an initial time slot, and determines the i-th time slot after the initial time slot that satisfies the first preset condition, which is the The time slot of the ith repeated transmission.
  • the time domain offset may be a time slot offset, and the time slot offset may be represented by K2.
  • the first preset condition includes: the number of available OFDM symbols reaches a preset value, and the preset value may be determined according to the actual structure of the time slot, for example, the threshold value is 1, or 2, or 3, or 4.
  • the available OFDM symbols may belong to one time slot, and the available OFDM symbols include: the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI; wherein the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI; The direction of the initial transmission signal scheduled by the DCI is the same, and may be: the scheduled DCI is used to schedule the PUSCH, and the OFDM symbol is an uplink symbol and/or a flexible symbol.
  • the DCI is transmitted using the PDCCH in Slot 4, and the time slot offset between the DCI and the PUSCH scheduled by the DCI is 4, then the scheduling DCI is used to schedule the transmission of the PUSCH in Slot 8, then Slot 8 bits start time slot.
  • the time slot of the first repeated transmission is the time slot after Slot8 where the number of available OFDM symbols reaches the preset value
  • the time slot of the second repeated transmission is the time slot after Slot8 where the number of available 2nd OFDM symbols reaches the preset value.
  • the set value of the time slot, and so on, the time slot for the i-th repeated transmission is the time slot for which the number of the i-th available OFDM symbols after Slot8 is greater than or equal to the preset value.
  • the communication device uses the time slot indicated by the time domain offset as the initial time slot, and the time slot satisfying the second preset condition from the initial time slot is the repeated transmission time slot.
  • the second preset condition includes: the number of continuously available OFDM symbols reaches a preset value, and the preset value may be determined according to the time slot format, for example, the preset value is 1, or 2, or 3, or 4.
  • one, or two, or more than two repeated transmissions may be performed within a time slot.
  • the initial time slot is used for the initial transmission of signals, then the first repeated transmission of the signal can also be in the initial time slot; or, the second time can be performed in a time slot Repeat transmission and third repeat transmission; even more than two repeat transmissions can be performed in one time slot.
  • the PDCCH is used to transmit DCI
  • the time slot offset between the DCI and the initial transmission of the PUSCH scheduled by the DCI is 4, then the DCI is used to schedule the transmission of the PUSCH in Slot8, then the Slot8 bit starts time slot.
  • the time slot for the first repeated transmission starts from Slot8, the first time slot when the number of consecutively available OFDM symbols reaches the preset value, the time slot for the second repeated transmission starts from Slot8, and the second continuous available OFDM symbol
  • the number of time slots reaches the preset value, and so on, the time slot of the ith repeated transmission is the time slot to which the number of the ith continuous available OFDM symbols is greater than or equal to the threshold OFDM symbol group from Slot8.
  • a time slot may include two or more consecutively available OFDM symbols whose number reaches a preset value;
  • the time slot in which the number of 2 consecutively available OFDM symbols reaches the preset value can be the same time slot; for example, the preset value is 2, and the number of two consecutively available OFDM symbols in slot9 is 2, then the two A group of consecutively available OFDM symbols corresponds to two repeated transmissions within one time slot.
  • the initial transmission signal scheduled by DCI is PDSCH, and the communication device determines the time slot of the i-th repeated transmission according to the time domain offset between DCI and the PDSCH; wherein, i is greater than or equal to 0, and i is less than the Duplicate values are transmitted.
  • the communication device uses the time slot indicated by the time domain offset as an initial time slot, and determines the i-th time slot after the initial time slot that satisfies the first preset condition, which is the The time slot of the ith repeated transmission.
  • the time domain offset may be a time slot offset, and the time slot offset may be represented by K2.
  • the first preset condition includes: the number of available OFDM symbols reaches a preset value, and the preset value may be determined according to the actual structure of the time slot, for example, the threshold value is 1, or 2, or 3, or 4.
  • the available OFDM symbols may belong to one time slot, and the available OFDM symbols include: the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI; wherein the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI; The direction of the initial transmission signal scheduled by the DCI is the same, and may be: the scheduled DCI is used to schedule the PDSCH, and the OFDM symbol is a downlink symbol and/or a flexible symbol.
  • the direction of the symbol may refer to the direction of the signal carried by the symbol. If the signal carried by the symbol is an uplink signal, the direction of the symbol is uplink; if the signal carried by the symbol is a downlink signal, the direction of the symbol is downlink .
  • the PDCCH is used to transmit DCI in Slot1
  • the time slot offset between the DCI and the PDSCH scheduled by the DCI is 2
  • the DCI is used to schedule the PDSCH transmission in Slot3
  • the Slot3 bit starts start time slot.
  • the time slot of the first repeated transmission is the time slot after Slot3 where the number of available OFDM symbols reaches the preset value
  • the time slot of the second repeated transmission is the time slot after Slot3 where the number of the second available OFDM symbols reaches the preset value.
  • the set time slot, and so on, the time slot for the i-th repeated transmission is the time slot in which the number of the i-th available OFDM symbols after Slot3 reaches the preset value.
  • the communication device uses the time slot indicated by the time domain offset as the starting time slot, and the time slot satisfying the second preset condition from the starting time slot is the time slot of the repeated transmission. time slot.
  • the second preset condition includes: the number of continuously available OFDM symbols reaches a preset value, and the preset value may be determined according to the time slot format, such as preset as 1, or 2, or 3, or 4.
  • one, or two, or more than two repeated transmissions may be performed within a time slot.
  • the initial time slot is used for the initial transmission of signals, then the first repeated transmission of the signal can also be in the initial time slot; or, the second time can be performed in a time slot Repeat transmission and third repeat transmission; even more than two repeat transmissions can be performed in one time slot.
  • the PDCCH is used to transmit DCI
  • the time slot interval between the DCI and the PDSCH initial transmission scheduled by the DCI is 2, then the DCI is used to schedule the PDSCH transmission in Slot3, then when the Slot3 bit starts gap.
  • the time slot for the first repeated transmission starts from Slot3, the first time slot when the number of continuously available OFDM symbols reaches the preset value, the time slot for the second repeated transmission starts from Slot3, and the second continuous available OFDM symbol
  • the number of time slots reaches the preset value, and so on, the time slot for the i-th repeated transmission starts from Slot3, and the number of the i-th continuous available OFDM symbols reaches the preset value.
  • a time slot may include two or more consecutively available OFDM symbols whose number reaches a preset value;
  • the time slot in which the number of 2 consecutively available OFDM symbols reaches the preset value can be the same time slot; for example, the preset value is 2, and the number of two consecutively available OFDM symbols in slot9 is 2, then the two A group of consecutively available OFDM symbols corresponds to two repeated transmissions within one time slot.
  • the initial transmission signal scheduled by DCI is PDSCH, the HARQ-ACK transmission time slot corresponding to the PDSCH scheduled by the DCI, the time slot for stopping repeated transmission and the PDSCH indicated by the DCI and the HARQ-ACK corresponding to the PDSCH.
  • the time slot interval (K1) for ACK feedback is determined. It can also be understood that the HARQ-ACK transmission time slot corresponding to the PDSCH scheduled by the DCI is determined by the sum of the time slot of the last repeated transmission and the K1 indicated by the DCI.
  • the communication device determines that the position of the HARQ-ACK transmission time slot corresponding to the PDSCH scheduled by the DCI is equal to the initial transmission PDSCH indicated in the DCI and the HARQ-ACK feedback corresponding to the initial transmission PDSCH The time slot position corresponding to the sum of the time slot interval and the sum of the time slots for stopping repeated transmission.
  • the time slot for stopping repeated transmission is Slot n
  • the time slot interval between the initial transmission PDSCH and the HARQ-ACK feedback corresponding to the initial transmission PDSCH is K1
  • the communication device feeds back through PUCCH at Slot n+K1 HARQ-ACK or HARQ-NACK.
  • the scheduling DCI is transmitted using the PDCCH in Slot 1, and the scheduling DCI is used to schedule the PDSCH transmission in Slot 3.
  • the time slot offset of the HARQ-ACK feedback corresponding to the PDSCH and the PDSCH is 2, and repeated transmission is stopped.
  • the time slot is Slot6, the communication device transmits HARQ-ACK in Slot8.
  • the OFDM symbol used for transmitting the demodulation reference signal DMRS in one time slot of the repeated transmission is determined by the number of OFDM symbols used for the repeated transmission, the mapping type of the repeated transmission, and The DMRS additional position parameter (dmrs-AdditionalPosition) is determined.
  • the mapping types of repeated transmission may include at least two types, such as mapping type A or mapping type B.
  • the DMRS is used to indicate the position of one or more symbols in the slot where the DMRS is located; the dmrs-AdditionalPosition parameter can indicate the density of the DMRS in the slot.
  • the positions of the multiple symbols where the DMRS is located may be in one symbol group, or may be in different symbol groups.
  • the position of the OFDM symbol to which the reference signal is mapped may be determined according to the following Table 1; wherein, ld is the number of OFDM symbols that are repeatedly transmitted for i times. l 0 indicates the start symbol of this group of OFDM symbols.
  • PUSCH mapping repeated transmission mapping type
  • the communication device stops the repeated transmission if the number of repeated transmissions of the PDSCH or PUSCH scheduled by the scheduling DCI is greater than or equal to the repeated transmission value.
  • the repeated transmission value has a valid transmission time; if the number of times of the repeated transmission is greater than or equal to the transmission repetition value within the valid transmission time, the repeated transmission is stopped; or, if it reaches Effective transmission time, if the number of repeated transmissions is less than the transmission repetition value, the repeated transmission is stopped.
  • the repeated transmission value is the maximum number of repeated transmissions within the valid transmission time.
  • the repeated transmission method provided by the embodiment of the present application can adaptively perform repeated transmission according to the time slot structure, and clarifies the HARQ feedback mechanism.
  • the time slot that can transmit the repeated transmission under the TDD system and the flexible time slot structure is clarified, and the available time slot is effectively used to transmit PUSCH and/or PDSCH, which solves the problem of PUSCH and/or PDSCH.
  • the problem of insufficient data coverage improves the efficiency of repeated data transmission.
  • the repeated transmission method provided by the embodiments of the present application can reduce the number of HARQ retransmissions by effectively utilizing time slots to transmit data.
  • the repeated transmission method dynamically determines the mapping situation of the DMRS of the PUSCH and/or PDSCH and the OFDM symbol of the data payload based on the factor of the time slot structure, thereby ensuring the reception performance of the data by the receiving end; and,
  • the receiving end can be compatible with the demodulation mechanism of the original NR system to the maximum extent, which reduces the complexity of the receiving end and ensures the compatibility of the system.
  • the embodiment of the present application further provides a communication device.
  • the optional composition structure of the communication device 300 includes:
  • the processing unit 301 is configured to determine a time slot for repeated transmission according to first information; the first information includes at least one of the following:
  • the processing unit 301 is configured to, if the initial transmission signal includes the PUSCH, the communication device determines the ith time according to the time slot offset between the DCI and the PUSCH A time slot for repeated transmissions; where i is greater than or equal to 0 and i is less than the transmission repetition value.
  • the processing unit 301 is configured to, if the initial transmission signal includes the PDSCH, the communication device determines the ith time according to the time domain offset between the DCI and the PDSCH A time slot for repeated transmissions; where i is greater than or equal to 0 and i is less than the transmission repetition value.
  • the time slot indicated by the time domain offset is used as an initial time slot, and the i th time slot after the initial time slot that satisfies the first preset condition is the ith time slot.
  • the first preset condition includes: the number of available OFDM symbols reaches a preset value.
  • the available OFDM symbols are contiguous within the time slot; alternatively, the available OFDM symbols are discontinuous within the time slot.
  • the time slot indicated by the time domain offset is used as the starting time slot, and the time slot satisfying the second preset condition from the starting time slot is the time slot of the repeated transmission. time slot.
  • the second preset condition includes: the number of consecutive available OFDM symbols reaches a preset value.
  • the available OFDM symbols include: the direction of the OFDM symbols is the same as the direction of the initial transmission signal scheduled by the DCI.
  • the direction of the OFDM symbol is the same as the direction of the initial transmission signal scheduled by the DCI, including at least one of the following:
  • the scheduling DCI is used for scheduling PDSCH, and the OFDM symbols are downlink symbols and/or flexible symbols;
  • the scheduling DCI is used for scheduling the PUSCH, and the OFDM symbols are uplink symbols and/or flexible symbols.
  • the time domain position for transmitting the HARQ-ACK corresponding to the PDSCH is determined by the time slot in which repeated transmission is stopped and the PDSCH indicated by the DCI and the PDSCH.
  • the time domain offset of the HARQ-ACK corresponding to the PDSCH is determined.
  • the time domain position for transmitting the HARQ-ACK is equal to the time corresponding to the sum of the time domain offset of the PDSCH and the HARQ-ACK and the sum of the time slots for stopping repeated transmission gap location.
  • the processing unit 301 is further configured to stop the repeated transmission if the number of times of the repeated transmission is greater than or equal to the repeated transmission value.
  • the processing unit 301 is configured to stop the repeated transmission if the number of times of the repeated transmission is greater than or equal to the transmission repetition value within the valid transmission time.
  • the processing unit 301 is configured to stop the repeated transmission if the number of times of the repeated transmission is less than the transmission repetition value when the valid transmission time is reached.
  • the OFDM symbols used for transmitting DMRS in one time slot of the repeated transmission are determined by the number of OFDM symbols available for repeated transmission, the mapping type (mapping type) of the repeated transmission and the DMRS The additional position (dmrs-AdditionalPosition) parameter is determined.
  • the positions of the multiple symbols where the DMRS is located may be in one symbol group, or may be in different symbol groups.
  • the repeated transmission includes: uplink repeated transmission and/or downlink repeated transmission.
  • the communication device 300 includes: a terminal device and/or a network device.
  • the communication device 300 if the communication device 300 includes a terminal device, the communication device further includes:
  • the first communication unit 302 is configured to receive the DCI and RRC signaling, receive downlink data or send uplink data.
  • the communication device 300 if the communication device 300 includes a network device, the communication device further includes:
  • the second communication unit 303 is configured to send DCI and RRC signaling, to send downlink data or to receive uplink data.
  • An embodiment of the present application further provides a communication device, including a processor and a memory for storing a computer program that can be executed on the processor, wherein the processor is configured to execute the above-mentioned communication device when running the computer program. Repeat the steps of the transfer method.
  • An embodiment of the present application further provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device on which the chip is installed executes the repeated transmission method executed by the communication device.
  • An embodiment of the present application further provides a storage medium storing an executable program, and when the executable program is executed by a processor, the above-mentioned repeated transmission method performed by the communication device is implemented.
  • Embodiments of the present application further provide a computer program product, including computer program instructions, the computer program instructions enable a computer to execute the repeated transmission method executed by the above communication device.
  • the embodiment of the present application further provides a computer program, the computer program enables the computer to execute the repeated transmission method executed by the above communication device.
  • the communication device 700 includes: at least one processor 701 , memory 702 and at least one network interface 704 .
  • the various components in communication device 700 are coupled together by bus system 705 .
  • bus system 705 is used to implement the connection communication between these components.
  • the bus system 705 also includes a power bus, a control bus and a status signal bus.
  • the various buses are labeled as bus system 705 in FIG. 9 .
  • memory 702 may be either volatile memory or non-volatile memory, and may include both volatile and non-volatile memory.
  • the non-volatile memory can be ROM, Programmable Read-Only Memory (PROM, Programmable Read-Only Memory), Erasable Programmable Read-Only Memory (EPROM, Erasable Programmable Read-Only Memory), Electrically Erasable Programmable Read-Only Memory Programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), magnetic random access memory (FRAM, ferromagnetic random access memory), flash memory (Flash Memory), magnetic surface memory, optical disk, or CD-ROM -ROM, Compact Disc Read-Only Memory); magnetic surface memory can be disk memory or tape memory.
  • RAM Random Access Memory
  • SRAM Static Random Access Memory
  • SSRAM Synchronous Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM Enhanced Type Synchronous Dynamic Random Access Memory
  • SLDRAM Synchronous Link Dynamic Random Access Memory
  • DRRAM Direct Rambus Random Access Memory
  • the memory 702 described in the embodiments of the present application is intended to include, but not limited to, these and any other suitable types of memory.
  • the memory 702 in this embodiment of the present application is used to store various types of data to support the operation of the communication device 700 .
  • Examples of such data include: any computer program used to operate on the communication device 700, such as the application program 7022.
  • the program for implementing the method of the embodiment of the present application may be included in the application program 7022 .
  • the methods disclosed in the above embodiments of the present application may be applied to the processor 701 or implemented by the processor 701 .
  • the processor 701 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method can be completed by an integrated logic circuit of hardware in the processor 701 or an instruction in the form of software.
  • the above-mentioned processor 701 may be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • the processor 701 may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of this application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a storage medium, and the storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702, and completes the steps of the foregoing method in combination with its hardware.
  • the communication device 700 may be implemented by one or more of an Application Specific Integrated Circuit (ASIC), a DSP, a Programmable Logic Device (PLD), a Complex Programmable Logic Device (CPLD) , Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, MPU, or other electronic component implementation for performing the aforementioned method.
  • ASIC Application Specific Integrated Circuit
  • DSP Digital Signal processor
  • PLD Programmable Logic Device
  • CPLD Complex Programmable Logic Device
  • FPGA general-purpose processor
  • controller MCU, MPU, or other electronic component implementation for performing the aforementioned method.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

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

Abstract

Est divulgué un procédé de transmission répétitive, comprenant l'étape suivante dans laquelle : un dispositif de communication détermine un intervalle de temps pour une transmission répétitive en fonction de premières informations, les premières informations comprenant : une valeur de répétition de transmission, des informations de synchronisation pour planifier des informations de commande de liaison descendante (DCI) et/ou une structure d'intervalle de temps. Sont en outre divulgués un dispositif de communication et un support d'enregistrement.
PCT/CN2020/118413 2020-09-28 2020-09-28 Procédé de transmission répétitive, dispositif de communication et support d'enregistrement WO2022061891A1 (fr)

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PCT/CN2020/118413 WO2022061891A1 (fr) 2020-09-28 2020-09-28 Procédé de transmission répétitive, dispositif de communication et support d'enregistrement
CN202080102933.5A CN115836501A (zh) 2020-09-28 2020-09-28 一种重复传输方法、通信设备及存储介质

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