WO2021027790A1 - Procédé et appareil de communication de liaison latérale - Google Patents

Procédé et appareil de communication de liaison latérale Download PDF

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Publication number
WO2021027790A1
WO2021027790A1 PCT/CN2020/108297 CN2020108297W WO2021027790A1 WO 2021027790 A1 WO2021027790 A1 WO 2021027790A1 CN 2020108297 W CN2020108297 W CN 2020108297W WO 2021027790 A1 WO2021027790 A1 WO 2021027790A1
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WIPO (PCT)
Prior art keywords
time slot
information
terminal device
uplink
configuration period
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PCT/CN2020/108297
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English (en)
Chinese (zh)
Inventor
袁璞
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华为技术有限公司
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Publication of WO2021027790A1 publication Critical patent/WO2021027790A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • 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
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a side link communication method and device.
  • 5G New Radio Access Technology 5th Generation New Radio Access Technology, 5G NR
  • uplink time slot Downlink time slot
  • configurable time slot all symbols in the uplink time slot are For uplink symbols, all symbols in the downlink time slot are downlink symbols, and all symbols in the configurable time slot can be freely configured as uplink symbols or downlink symbols or flexible symbols.
  • the uplink and downlink time division multiplexing (TDD) configuration of the terminal equipment is indicated by two kinds of signaling: one signaling is tdd-UL-DL -ConfigurationCommon, used to configure the uplink and downlink TDD of the time slot granularity, the signaling needs to occupy at least 27 bits; the other signaling is the slot format indicator (Slot Format Indicator, SFI), which is used to configure the time slot of the configurable time slot Slot format, as shown in Figure 1, the slot format refers to whether each symbol in the configurable slot is an uplink symbol, a downlink symbol or a flexible symbol, and the signaling needs to occupy at least 8 bits.
  • SFI Slot Format Indicator
  • the information of the uplink and downlink TDD configuration is carried on the physical sidelink broadcast channel (PSBCH), and the current 3 rd generation partner project (the 3 rd generation partner project, 3GPP) conference working hypothesis stipulates that the PSBCH is carried
  • the maximum number of information bits is 32 bits. Therefore, a total of 35 bits are required to configure the uplink and downlink TDD in the above manner, which exceeds the capacity of the PSBCH in the working hypothesis. If the working hypothesis is modified to increase the number of information bits carried by the PSBCH, the coding rate of the information bits carried by the PSBCH will increase, which will affect the decoding success rate of the PSBCH.
  • the embodiments of the present application provide a side link communication method and device, which are used to configure uplink and downlink TDD in the side link, reduce the code rate of the PSBCH, and improve the reliability of reception.
  • the present application provides a sidelink communication method, which can be applied to a first terminal device, and the method includes: the first terminal device determines first information, the first information is used to indicate a time slot configuration period And the number of at least one uplink time slot in the time slot configuration period, the time slot configuration period includes at least one uplink time slot; the first terminal device sends the first information to the second terminal device.
  • the uplink time slot in the time slot configuration period can be used by the second terminal device for sidelink transmission.
  • the first terminal device sends to the second terminal device to indicate the time slot configuration period and the time.
  • the first information about the number of at least one uplink time slot in the slot configuration period can indirectly indicate the position of each uplink time slot in the time slot configuration period, so that the second terminal device can use the uplink time in the time slot configuration period.
  • the resources of the slot are used for side-link communication with the first terminal device.
  • the time slot configuration period in the embodiment of the present application can be indicated by 4 bits, and the number of uplink time slots in the time slot configuration period can be indicated by 7 bits.
  • the first terminal device transmits via the PSBCH channel to indicate the time slot configuration.
  • the number of bits required to indicate the time slot configuration period and the number of uplink time slots in the time slot configuration period is still less than what can be accommodated in the PSBCH
  • the number of information bits therefore, can effectively ensure the low bit rate of PSBCH and improve the reliability of transmission.
  • the time slot configuration period may also include at least one configurable time slot; the first terminal device may send second information and third information to the second terminal device, and the second information is used to indicate The number of at least one configurable time slot in the time slot configuration period, and the third information is used to indicate at least one of the following information: the type information of each symbol in the configurable time slot, and the position of the uplink symbol in the configurable time slot Information, the number of uplink symbols in the configurable time slot, the position information of the uplink symbols and the flexible symbol in the configurable time slot.
  • the configurable time slot in the time slot configuration period can also be used for the second terminal device to perform side-link transmission.
  • the uplink symbol in the configurable time slot can be used for side-link transmission. It may also be that uplink symbols and/or flexible symbols in configurable time slots can be used for sidelink transmission.
  • the first terminal device can indicate the position of the uplink symbol and/or flexible symbol used for sidelink transmission in each configurable time slot by sending the second information and the third information to the second terminal device , So that the second terminal device can use the resources of the uplink time slot in the time slot configuration period and the resources of the uplink symbols and/or flexible symbols in the configurable time slot to perform sidelink communication. In this way, side-line communication resources can be increased, and communication opportunities can be improved.
  • the number of configurable time slots in the time slot configuration period can be indicated by 7 bits
  • the type information of each symbol in the configurable time slot can be indicated by 8 bits
  • the uplink symbols in the time slot can be configured
  • the position information of the uplink symbol or the position information of the flexible symbol in the configurable time slot can be indicated by 4 bits
  • the number of uplink symbols in the configurable time slot can be indicated by 4 bits.
  • the first terminal device sends the information through the PSBCH channel
  • the total number of bits occupied by the first information, the second information, and the third information is still less than the number of information bits that can be accommodated in the PSBCH, which can effectively ensure that the PSBCH is low.
  • the code rate improves the reliability of transmission.
  • the first terminal device may send the first information through the first broadcast message.
  • the first terminal device may also send the second information and the third information through the first broadcast message, or the first terminal device may also send the second information and the third information through the system information block SIB message or the radio resource control RRC message; or ,
  • the first terminal device may also send the second information through the first broadcast message, and send the third information through the SIB message or the RRC message.
  • the first broadcast message may be a synchronization signal block SSB message carried on the PSBCH channel, or other messages sent on the PSBCH channel.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the first information, the second information, and the third information in the embodiments of the present application may have multiple possible sending modes.
  • the first information can be sent through the SSB message carried on the PSBCH channel
  • the second information can be sent in the SSB message carried on the PSBCH channel, or can also be sent through separate signaling such as SIB messages or RRC messages.
  • the third information is similar to the second information, so it has better flexibility.
  • the first information, second information, and third information in the embodiments of the present application can be sent in the same message or in different messages, and the first terminal device can choose the sending mode according to actual needs. Therefore, it has strong applicability.
  • the first terminal device may send fifth information to the second terminal device.
  • the fifth information is used to indicate the position of the time slot used for sidelink transmission in the time slot configuration period.
  • the time slots used for sidelink transmission include uplink time slots and/or configurable time slots.
  • the second terminal device when the first terminal device does not clearly indicate which time slots in the time slot configuration period can be used for sidelink transmission, the second terminal device can default the uplink time slots in the time slot configuration period, And the uplink symbols and/or flexible symbols in the configurable time slot can be used for side link transmission.
  • the second terminal device can determine that only the time slots configured in the fifth information Slots can be used for side-link transmission, and then use the resources of these time slots for side-link communication. In this way, the flexibility of side-link communication can be effectively improved.
  • the first terminal device may send sixth information to the second terminal device, where the sixth information is used to indicate the position of the sideline symbol in each time slot used for sideline link transmission.
  • the first terminal device can also indicate which symbols in each time slot used for side-link transmission are side-line symbols by sending the sixth information.
  • a time slot used for side-link transmission only uplink symbols or flexible symbols configured as side-line symbols can be used for side-link transmission, while other symbols in the time slot are not used for side-link transmission .
  • the second terminal device may default to the uplink symbols in these time slots And/or flexible symbols can be used for side link transmission.
  • the first terminal device may also clearly indicate which symbols in each time slot used for side-link transmission are side-line symbols.
  • the first terminal device can configure part or all of the uplink symbols and/or part or all of the flexible symbols in the time slot as side-line symbols, which can effectively improve the side-line Flexibility of link communication.
  • the fifth information may include: the first bitmap or the first bitmap used to indicate whether each time slot in the time slot configuration period is a time slot for sidelink transmission.
  • the index value corresponding to the bitmap Each bit in the first bitmap can be used to indicate whether the corresponding time slot is a time slot used for side link transmission. For example, when the bit value is 1, it can indicate that the corresponding time slot is used for side link transmission. When the bit value is 0, it can indicate that the corresponding time slot is not used for sidelink transmission.
  • the sixth information may include: a second bitmap used to indicate whether each symbol in each time slot used for side-link transmission is a second bitmap or an index value corresponding to the second bitmap, the second bitmap Each bit in is used to indicate whether the corresponding symbol is a side row symbol, for example, when the bit value is 1, it can indicate that the corresponding symbol is a side row symbol, and when the bit value is 0, it can indicate that the corresponding symbol is not a side row symbol.
  • the sixth information may include slot format indication SFI information or an index value corresponding to the SFI information, and the SFI information is used to indicate the type of each symbol in each slot used for sidelink transmission.
  • the sixth information can also directly indicate the slot format of each slot used for sidelink transmission.
  • the first terminal device may send the fifth information through a system information block SIB message or a radio resource control RRC message, and the first terminal device may send the sixth information through a SIB message or an RRC message.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the fifth information and the sixth information can be received through the same message, for example, the fifth information and the sixth information are carried in the same RRC message, or they can be sent through different messages, for example, the fifth information is carried in the RRC message, The sixth information is carried in the SIB message.
  • the present application provides a sidelink communication method, which can be applied to a second terminal device, and the method includes: the second terminal device receives first information from the first terminal device, and the first information is used for Indicate the time slot configuration period and the number of at least one uplink time slot in the time slot configuration period, the time slot configuration period includes at least one uplink time slot; the second terminal device performs side-by-side communication with the first terminal device on the first resource For link communication, the first resource includes a resource corresponding to the at least one uplink time slot.
  • the uplink time slot in the time slot configuration period can be used by the second terminal device for sidelink transmission, and the second terminal device can indicate the time slot configuration period and the time slot configuration period received from the first terminal device.
  • the first information about the number of at least one uplink time slot in the time slot configuration period determines the position of each uplink time slot in the time slot configuration period, so that the resources of the uplink time slot in the time slot configuration period can be used with the first A terminal device performs side-link communication.
  • the time slot configuration period in the embodiment of the present application can be indicated by 4 bits, and the number of uplink time slots in the time slot configuration period can be indicated by 7 bits.
  • the first terminal device transmits via the PSBCH channel to indicate the time slot configuration.
  • the number of bits required to indicate the number of uplink time slots in the time slot configuration period and the time slot configuration period is still less than the information that can be contained in the PSBCH Therefore, it can effectively ensure the low bit rate of PSBCH and improve the reliability of transmission.
  • the time slot configuration period further includes at least one configurable time slot
  • the first resource also includes at least one resource corresponding to the uplink symbol and/or flexible symbol in the configurable time slot; accordingly, the first resource
  • the second terminal device may also receive second information and third information from the first terminal device, the second information is used to indicate the number of at least one configurable time slot in the time slot configuration period, and the third information is used to indicate the following information At least one piece of information: the type information of each symbol in the configurable time slot, the position information of the uplink symbol in the configurable time slot, the number of uplink symbols in the configurable time slot, the information of the uplink symbols in the configurable time slot and the flexible symbol location information.
  • the configurable time slot in the time slot configuration period can also be used for the second terminal device to perform side-link transmission.
  • the uplink symbol in the configurable time slot can be used for side-link transmission. It may also be that the uplink symbols and/or flexible symbols in the configurable time slot can be used for side link transmission. Therefore, the second terminal device can determine the uplink symbols and/or flexible symbols used for sidelink transmission in each configurable time slot according to the second information and the third information received from the first terminal device. Position, the resources of the uplink time slot in the time slot configuration period, and the resources of the uplink symbols and/or flexible symbols in the configurable time slot can be used for side-link communication. In this way, the side-line communication resources can be increased and the Communication opportunities.
  • the number of configurable time slots in the time slot configuration period can be indicated by 7 bits
  • the type information of each symbol in the configurable time slot can be indicated by 8 bits
  • the uplink symbols in the time slot can be configured
  • the position information of the uplink symbol or the position information of the flexible symbol in the configurable time slot can be indicated by 4 bits
  • the number of uplink symbols in the configurable time slot can be indicated by 4 bits.
  • the first terminal device sends the information through the PSBCH channel
  • the total number of bits occupied by the first information, the second information, and the third information is still less than the number of information bits that can be accommodated in the PSBCH, which can effectively ensure that the PSBCH is low.
  • the code rate improves the reliability of transmission.
  • the second terminal device may receive the first information through the first broadcast message; the second terminal device may receive the second information and the third information through the first broadcast message; or the second terminal device may also The system information block SIB message or the radio resource control RRC message receives the second information and the third information; or, the second terminal device may also receive the second information through the first broadcast message, and the third information through the SIB message or the RRC message.
  • the first broadcast message may be a synchronization signal block SSB message carried on the PSBCH channel, or other messages sent on the PSBCH channel.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the first information, the second information, and the third information in the embodiments of the present application may have multiple possible sending modes.
  • the first information can be sent through the SSB message carried on the PSBCH channel
  • the second information can be sent in the SSB message carried on the PSBCH channel, or can also be sent through separate signaling such as SIB messages or RRC messages.
  • the third information is similar to the second information, so it has better flexibility.
  • the first information, second information, and third information in the embodiments of this application can be sent in the same message or in different messages. For example, they can all be sent in an SSB message.
  • the specific sending method can be The first terminal device selects according to actual needs, so it has strong applicability.
  • the second terminal device may receive fifth information from the first terminal device, and the fifth information is used to indicate the position of the time slot used for sidelink transmission in the time slot configuration period.
  • the time slots used for sidelink transmission include uplink time slots and/or configurable time slots.
  • the second terminal device when the first terminal device does not clearly indicate which time slots in the time slot configuration period can be used for sidelink transmission, the second terminal device can default the uplink time slots in the time slot configuration period, And the uplink symbols and/or flexible symbols in the configurable time slot can be used for side link transmission.
  • the second terminal device can determine that only the time slots configured in the fifth information Slots can be used for side-link transmission, and then use the resources of these time slots for side-link communication. In this way, the flexibility of side-link communication can be effectively improved.
  • the second terminal device may receive sixth information from the first terminal device, where the sixth information is used to indicate the position of the sideline symbol in each time slot used for sidelink transmission.
  • the first terminal device can indicate which symbols in each time slot used for side-link transmission are side-line symbols by sending the sixth information.
  • a time slot used for side-link transmission only uplink symbols or flexible symbols configured as side-line symbols can be used for side-link transmission, while other symbols in the time slot are not used for side-link transmission .
  • the second terminal device may default to the uplink symbols in these time slots And/or flexible symbols can be used for side link transmission.
  • the first terminal device may also clearly indicate which symbols in each time slot used for side-link transmission are side-line symbols.
  • the first terminal device can configure part or all of the uplink symbols and/or part or all of the flexible symbols in the time slot as side-line symbols, which can effectively improve the side-line Flexibility of link communication.
  • the fifth information may include: the first bitmap or the first bitmap used to indicate whether each time slot in the time slot configuration period is a time slot for sidelink transmission.
  • the index value corresponding to the bitmap Each bit in the first bitmap can be used to indicate whether the corresponding time slot is a time slot used for side link transmission. For example, when the bit value is 1, it can indicate that the corresponding time slot is used for side link transmission. When the bit value is 0, it can indicate that the corresponding time slot is not used for sidelink transmission.
  • the sixth information may include: a second bitmap used to indicate whether each symbol in each time slot used for side-link transmission is a second bitmap or an index value corresponding to the second bitmap, the second bitmap Each bit in is used to indicate whether the corresponding symbol is a side row symbol, for example, when the bit value is 1, it can indicate that the corresponding symbol is a side row symbol, and when the bit value is 0, it can indicate that the corresponding symbol is not a side row symbol.
  • the sixth information may include slot format indication SFI information or an index value corresponding to the SFI information, and the SFI information is used to indicate the type of each symbol in each slot used for sidelink transmission.
  • the sixth information can also directly indicate the slot format of each slot used for sidelink transmission.
  • the second terminal device may receive the fifth information through a system information block SIB message or a radio resource control RRC message, and the second terminal device may receive the sixth information through a SIB message or an RRC message.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the fifth information and the sixth information can be received through the same message, for example, the fifth information and the sixth information are carried in the same RRC message, or they can be sent through different messages, for example, the fifth information is carried in the RRC message, The sixth information is carried in the SIB message.
  • the present application provides a sidelink communication method, which can be applied to a first terminal device, and the method includes: the first terminal device determines seventh, eighth, and ninth information, and the seventh The information is used to indicate the time slot configuration period, the time slot configuration period includes at least one uplink time slot and at least one configurable time slot, and the eighth information is used to indicate the number of at least one configurable time slot in the time slot configuration period, The ninth information is used to indicate the offset value of the first configurable time slot in the time slot configuration period relative to the first time slot in the time slot configuration period; the first terminal device sends the seventh terminal device to the second terminal device. Information, eighth information and ninth information.
  • the uplink time slot in the time slot configuration period can be used by the second terminal device for sidelink transmission, according to the setting rules of the uplink time slot, configurable time slot and downlink time slot in the time slot configuration period,
  • the first terminal device transmits the seventh information for indicating the time slot configuration period, the eighth information for indicating the number of configurable time slots in the time slot configuration period, and the first information for indicating the time slot configuration period.
  • the ninth information of the offset value of the position of the configurable time slot relative to the first time slot can also indirectly indicate the position of each uplink time slot in the time slot configuration period, so that the second terminal device can use the The resources of the uplink time slot in the time slot configuration period perform side-link communication with the first terminal device.
  • the time slot configuration period, the number of configurable time slots, and the offset value of the first configurable time slot relative to the first time slot in the time slot configuration cycle in the embodiment of the present application can be indicated by 7 bits.
  • the total number of bits occupied by the seventh, eighth, and ninth information is still less than the information that can be accommodated in the PSBCH This can effectively ensure the low bit rate of PSBCH and improve the reliability of transmission.
  • the first terminal device may send tenth information to the second terminal device.
  • the tenth information is used to indicate at least one of the following information: the type information of each symbol in the configurable time slot, The position information of the uplink symbol in the configurable time slot, the quantity information of the uplink symbol in the configurable time slot, the position information of the uplink symbol and the flexible symbol in the configurable time slot.
  • the configurable time slot in the time slot configuration period can also be used by the second terminal device for side-link transmission.
  • the uplink symbol in the configurable time slot can be used for side-link transmission. It may be that uplink symbols and/or flexible symbols in a configurable time slot can be used for sidelink transmission. Therefore, the first terminal device can indicate the position of the uplink symbol and/or flexible symbol used for sidelink transmission in each configurable time slot by sending the tenth information to the second terminal device, so that the second The terminal equipment can use the resources of the uplink time slot in the time slot configuration period and the resources of the uplink symbols and/or flexible symbols in the configurable time slot to perform sidelink communication.
  • the first terminal device may send the seventh, eighth, and ninth information through the first broadcast message; the first terminal device may send the tenth information through the first broadcast message, or the first terminal The device may also send the tenth information through a system information block SIB message or a radio resource control RRC message.
  • the first broadcast message may be a synchronization signal block SSB message carried on the PSBCH channel, or other messages sent on the PSBCH channel.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the type information of each symbol in the configurable time slot can be indicated by 8 bits
  • the position information of the uplink symbol in the configurable time slot can be indicated by 4 bits
  • the number of uplink symbols in the configurable time slot can be indicated by 4-bit. Therefore, even in the scenario where the seventh, eighth, ninth, and tenth information are sent through the SSB message on the PSBCH channel, the total amount occupied by the seventh, eighth, ninth, and tenth information is The number of bits is still less than the number of information bits that can be contained in the PBSCH, which can effectively ensure the low bit rate of the PSBCH and improve the reliability of transmission.
  • the first terminal device may send fifth information to the second terminal device.
  • the fifth information is used to indicate the position of the time slot used for sidelink transmission in the time slot configuration period.
  • the time slots used for sidelink transmission include uplink time slots and/or configurable time slots.
  • the second terminal device when the first terminal device does not clearly indicate which time slots in the time slot configuration period can be used for sidelink transmission, the second terminal device can default the uplink time slots in the time slot configuration period, And the uplink symbols and/or flexible symbols in the configurable time slot can be used for side link transmission.
  • the second terminal device can determine that only the time slots configured in the fifth information Slots can be used for side-link transmission, and then use the resources of these time slots for side-link communication. In this way, the flexibility of side-link communication can be effectively improved.
  • the first terminal device may send sixth information to the second terminal device, where the sixth information is used to indicate the position of the sideline symbol in each time slot used for sideline link transmission.
  • the first terminal device can also indicate which symbols in each time slot used for side-link transmission are side-line symbols by sending the sixth information.
  • a time slot used for side-link transmission only uplink symbols or flexible symbols configured as side-line symbols can be used for side-link transmission, while other symbols in the time slot are not used for side-link transmission .
  • the second terminal device may default to the uplink symbols in these time slots And/or flexible symbols can be used for side link transmission.
  • the first terminal device may also clearly indicate which symbols in each time slot used for side-link transmission are side-line symbols.
  • the first terminal device can configure part or all of the uplink symbols and/or part or all of the flexible symbols in the time slot as side-line symbols, which can effectively improve the side-line Flexibility of link communication.
  • the fifth information may include: the first bitmap or the first bitmap used to indicate whether each time slot in the time slot configuration period is a time slot for sidelink transmission.
  • the index value corresponding to the bitmap Each bit in the first bitmap can be used to indicate whether the corresponding time slot is a time slot used for side link transmission. For example, when the bit value is 1, it can indicate that the corresponding time slot is used for side link transmission. When the bit value is 0, it can indicate that the corresponding time slot is not used for sidelink transmission.
  • the sixth information may include: a second bitmap used to indicate whether each symbol in each time slot used for side-link transmission is a second bitmap or an index value corresponding to the second bitmap, the second bitmap Each bit in is used to indicate whether the corresponding symbol is a side row symbol, for example, when the bit value is 1, it can indicate that the corresponding symbol is a side row symbol, and when the bit value is 0, it can indicate that the corresponding symbol is not a side row symbol.
  • the sixth information may include slot format indication SFI information or an index value corresponding to the SFI information, and the SFI information is used to indicate the type of each symbol in each slot used for sidelink transmission.
  • the sixth information can also directly indicate the slot format of each slot used for sidelink transmission.
  • the first terminal device may send the fifth information through a system information block SIB message or a radio resource control RRC message, and the first terminal device may send the sixth information through a SIB message or an RRC message.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the fifth information and the sixth information can be sent through the same message or through different messages.
  • the present application provides another sidelink communication method, which can be applied to a second terminal device, and the method includes: the second terminal device receives the seventh information, the eighth information, and the first terminal device from the first terminal device.
  • the seventh information is used to indicate the time slot configuration cycle
  • the time slot configuration cycle includes at least one uplink time slot and at least one configurable time slot
  • the eighth information is used to indicate at least one available time slot configuration cycle Configure the number of time slots
  • the ninth information is used to indicate the offset value of the first configurable time slot in the time slot configuration period relative to the first time slot in the time slot configuration period
  • the second terminal device is in the first Sidelink communication is performed with the first terminal device on the resource
  • the first resource includes a resource corresponding to at least one uplink time slot in the time slot configuration period.
  • the uplink time slot in the time slot configuration period can be used by the second terminal device for sidelink transmission, according to the setting rules of the uplink time slot, configurable time slot and downlink time slot in the time slot configuration period,
  • the second terminal device receives from the first terminal device the seventh information for indicating the time slot configuration period, the eighth information for indicating the number of configurable time slots in the time slot configuration period, and the eighth information for indicating the time slot configuration
  • the ninth information of the offset value of the position of the first configurable time slot in the cycle relative to the first time slot can also determine the position of each uplink time slot in the time slot configuration cycle, and then the time can be used.
  • the resources of the uplink time slot in the slot configuration period perform side-link communication with the first terminal device.
  • the time slot configuration period, the number of configurable time slots, and the relative offset value of the configurable time slots in the embodiments of the present application can all be indicated by 7 bits.
  • the first terminal device sends the seventh information through the PSBCH channel.
  • the total number of bits occupied by the seventh, eighth and ninth information is still less than the number of information bits that can be accommodated in the PSBCH, which can effectively ensure the low bit rate of the PSBCH and improve the transmission Reliability.
  • the second terminal device may receive tenth information from the first terminal device, and the tenth information is used to indicate at least one of the following information: type information of each symbol in the configurable time slot, The position information of the uplink symbol in the configurable time slot, the quantity information of the uplink symbol in the configurable time slot, the position information of the uplink symbol and the flexible symbol in the configurable time slot.
  • the first resource also includes resources corresponding to uplink symbols and/or flexible symbols in at least one configurable time slot.
  • the configurable time slot in the time slot configuration period can also be used by the second terminal device for side-link transmission.
  • the uplink symbol in the configurable time slot can be used for side-link transmission. It may be that uplink symbols and/or flexible symbols in a configurable time slot can be used for sidelink transmission.
  • the second terminal device can determine the position of the uplink symbol and/or flexible symbol for sidelink transmission in each configurable time slot according to the tenth information received from the first terminal device, and then can The resources of the uplink time slot in the time slot configuration period and the resources of the uplink symbols and/or flexible symbols in the configurable time slot are used for side link communication.
  • the second terminal device may receive the seventh, eighth, and ninth information through the first broadcast message; the second terminal device may receive the tenth information through the first broadcast message, or the second terminal The device may also receive the tenth information through a system information block SIB message or a radio resource control RRC message.
  • the first broadcast message may be a synchronization signal block SSB message carried on the PSBCH channel, or other messages sent on the PSBCH channel.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the type information of each symbol in the configurable time slot can be indicated by 8 bits
  • the position information of the uplink symbol in the configurable time slot can be indicated by 4 bits
  • the number of uplink symbols in the configurable time slot can be indicated by 4-bit. Therefore, even in the scenario where the seventh, eighth, ninth, and tenth information are sent through the SSB message on the PSBCH channel, the total amount occupied by the seventh, eighth, ninth, and tenth information is The number of bits is still less than the number of information bits that can be contained in the PBSCH, which can effectively ensure the low bit rate of the PSBCH and improve the reliability of transmission.
  • the second terminal device may receive fifth information from the first terminal device, and the fifth information is used to indicate the position of the time slot used for sidelink transmission in the time slot configuration period.
  • the time slots used for sidelink transmission include uplink time slots and/or configurable time slots.
  • the second terminal device when the first terminal device does not clearly indicate which time slots in the time slot configuration period can be used for sidelink transmission, the second terminal device can default the uplink time slots in the time slot configuration period, And the uplink symbols and/or flexible symbols in the configurable time slot can be used for side link transmission.
  • the second terminal device can determine that only the time slots configured in the fifth information Slots can be used for side-link transmission, and then use the resources of these time slots for side-link communication. In this way, the flexibility of side-link communication can be effectively improved.
  • the second terminal device may receive sixth information from the first terminal device, where the sixth information is used to indicate the position of the sideline symbol in each time slot used for sidelink transmission.
  • the first terminal device can indicate which symbols in each time slot used for side-link transmission are side-line symbols by sending the sixth information.
  • a time slot used for side-link transmission only uplink symbols or flexible symbols configured as side-line symbols can be used for side-link transmission, while other symbols in the time slot are not used for side-link transmission .
  • the second terminal device may default to the uplink symbols in these time slots And/or flexible symbols can be used for side link transmission.
  • the first terminal device may also clearly indicate which symbols in each time slot used for side-link transmission are side-line symbols.
  • the first terminal device can configure part or all of the uplink symbols and/or part or all of the flexible symbols in the time slot as side-line symbols, which can effectively improve the side-line Flexibility of link communication.
  • the fifth information may include: the first bitmap or the first bitmap used to indicate whether each time slot in the time slot configuration period is a time slot for sidelink transmission.
  • the index value corresponding to the bitmap Each bit in the first bitmap can be used to indicate whether the corresponding time slot is a time slot used for side link transmission. For example, when the bit value is 1, it can indicate that the corresponding time slot is used for side link transmission. When the bit value is 0, it can indicate that the corresponding time slot is not used for sidelink transmission.
  • the sixth information may include: a second bitmap used to indicate whether each symbol in each time slot used for side-link transmission is a second bitmap or an index value corresponding to the second bitmap, the second bitmap Each bit in is used to indicate whether the corresponding symbol is a side row symbol, for example, when the bit value is 1, it can indicate that the corresponding symbol is a side row symbol, and when the bit value is 0, it can indicate that the corresponding symbol is not a side row symbol.
  • the sixth information may include slot format indication SFI information or an index value corresponding to the SFI information, and the SFI information is used to indicate the type of each symbol in each slot used for sidelink transmission.
  • the sixth information can also directly indicate the slot format of each slot used for sidelink transmission.
  • the second terminal device may receive the fifth information through a system information block SIB message or a radio resource control RRC message, and the second terminal device may receive the sixth information through a SIB message or an RRC message.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the fifth information and the sixth information can be received through the same message, for example, the fifth information and the sixth information are carried in the same RRC message, or they can be sent through different messages, for example, the fifth information is carried in the RRC message, The sixth information is carried in the SIB message.
  • the present application provides yet another sidelink communication method, which can be applied to a first terminal device, and the method includes: the first terminal device determines fourth information and fifth information, and the fourth information is used for Indicate the time slot configuration period, the time slot configuration period includes at least one uplink time slot and/or at least one configurable time slot, and the fifth information is used to indicate the time slot used for side-link transmission in the time slot configuration period
  • the time slots used for sidelink transmission include uplink time slots and/or configurable time slots; the first terminal device sends the fourth information and the fifth information to the second terminal device.
  • the first terminal device may send the fifth information to clearly indicate which time slots in the time slot configuration period can be used for sidelink transmission.
  • the first terminal device may configure part or all of the uplink time slots in the time slot configuration period, and/or part or all of the configurable time slots in the time slot configuration period as time slots for sidelink transmission.
  • the second terminal device can use the resources of the time slot configured by the first terminal device for side-link transmission with the first terminal device to perform side-link communication.
  • the first terminal device may send sixth information to the second terminal device, where the sixth information is used to indicate the position of the sideline symbol in each time slot used for sideline link transmission.
  • the first terminal device can also indicate which symbols in each time slot used for side-link transmission are side-line symbols by sending the sixth information.
  • a time slot used for side-link transmission only uplink symbols or flexible symbols configured as side-line symbols can be used for side-link transmission, while other symbols in the time slot are not used for side-link transmission .
  • the fifth information may include: the first bitmap or the first bitmap used to indicate whether each time slot in the time slot configuration period is a time slot for sidelink transmission.
  • the index value corresponding to the bitmap Each bit in the first bitmap can be used to indicate whether the corresponding time slot is a time slot used for side link transmission. For example, when the bit value is 1, it can indicate that the corresponding time slot is used for side link transmission. When the bit value is 0, it can indicate that the corresponding time slot is not used for sidelink transmission.
  • the sixth information may include: a second bitmap used to indicate whether each symbol in each time slot used for side-link transmission is a second bitmap or an index value corresponding to the second bitmap, the second bitmap Each bit in is used to indicate whether the corresponding symbol is a side row symbol, for example, when the bit value is 1, it can indicate that the corresponding symbol is a side row symbol, and when the bit value is 0, it can indicate that the corresponding symbol is not a side row symbol.
  • the sixth information may include slot format indication SFI information or an index value corresponding to the SFI information, and the SFI information is used to indicate the type of each symbol in each slot used for sidelink transmission.
  • the sixth information can also directly indicate the slot format of each slot used for sidelink transmission.
  • the first terminal device may send the fourth information through a first broadcast message
  • the first terminal device may send the fifth information through a system information block SIB message or a radio resource control RRC message
  • the first terminal device may The sixth information is sent through the SIB message or the RRC message.
  • the first broadcast message may be a synchronization signal block SSB message carried on the PSBCH channel, or other messages sent on the PSBCH channel.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the fifth information and the sixth information can be sent through the same message or through different messages, so they have better flexibility.
  • the present application provides yet another sidelink communication method, which can be applied to a second terminal device, and the method includes: the second terminal device receives fourth information and fifth information from the first terminal device, and The fourth information is used to indicate the time slot configuration period, the time slot configuration period includes at least one uplink time slot and/or at least one configurable time slot, and the fifth information is used to indicate that the time slot configuration period is used for the side line chain The position of the time slot used for side-link transmission.
  • the time slot used for side-link transmission includes uplink time slot and/or configurable time slot; the second terminal device performs side-link with the first terminal device on the first resource
  • the first resource includes a resource corresponding to a time slot used for sidelink transmission in a time slot configuration period.
  • the fifth information received by the second terminal device from the first terminal device can clearly indicate which time slots in the time slot configuration period can be used for sidelink transmission.
  • the first terminal device may configure part or all of the uplink time slots in the time slot configuration period, and/or part or all of the configurable time slots in the time slot configuration period as time slots for sidelink transmission.
  • the second terminal device can use the resources of the time slot configured by the first terminal device for side-link transmission with the first terminal device to perform side-link communication.
  • the second terminal device may receive the sixth information from the first terminal device, and the sixth information is used to indicate the position of the side line symbol in each time slot used for side line link transmission.
  • the first resource may include a resource corresponding to a side line symbol in each time slot used for side line link transmission.
  • only uplink symbols and/or flexible symbols configured as side-line symbols may be used for side-line transmission, while other symbols in the time slot are not used for side-line transmission.
  • Link transmission may also directly consider the uplink symbols and/or flexible symbols in the time slot used for side link transmission as the side symbols in the time slot.
  • the first resource may include every The resources corresponding to uplink symbols and/or flexible symbols in two time slots used for side-link transmission.
  • the first terminal device can indicate the time of each time slot used for side-link transmission.
  • the slot structure indirectly indicates the position of the side line symbol in each time slot used for side line link transmission.
  • the fifth information may include: the first bitmap or the first bitmap used to indicate whether each time slot in the time slot configuration period is a time slot for sidelink transmission
  • the corresponding index value Each bit in the first bitmap can be used to indicate whether the corresponding time slot is a time slot used for side link transmission. For example, when the bit value is 1, it can indicate that the corresponding time slot is used for side link transmission. When the bit value is 0, it can indicate that the corresponding time slot is not used for sidelink transmission.
  • the sixth information may include: a second bitmap used to indicate whether each symbol in each time slot used for sideline link transmission is a sideline symbol or an index value corresponding to the second bitmap.
  • Each bit in the second bitmap is used to indicate whether the corresponding symbol is a side row symbol, for example, when the bit value is 1, it can indicate that the corresponding symbol is a side row symbol, and when the bit value is 0, it can indicate that the corresponding symbol is not Side line symbol.
  • the sixth information may include slot format indication SFI information or an index value corresponding to the SFI information, and the SFI information is used to indicate the type of each symbol in each slot used for sidelink transmission. That is to say, the sixth information can also directly indicate the time slot format of each time slot used for sidelink transmission.
  • the second terminal device may receive the fourth information through the first broadcast message, the second terminal device may receive the fifth information through the system information block SIB message or the radio resource control RRC message, and the second terminal device may The sixth information is received through the SIB message or the RRC message.
  • the first broadcast message may be a synchronization signal block SSB message carried on the PSBCH channel, or other messages sent on the PSBCH channel.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message.
  • the fifth information and the sixth information can be sent through the same message or through different messages, so they have better flexibility.
  • an embodiment of the present application provides a communication device that has the function of the first terminal device in any possible design of the first, third, and fifth aspects described above, or has The function of the second terminal device in any possible design of the second aspect, the fourth aspect, and the sixth aspect.
  • the communication device may be a terminal device, such as a handheld terminal device, a vehicle-mounted terminal device, a vehicle user device, a roadside unit, etc., or a device included in the terminal device, such as a chip, or a device including a terminal device.
  • the functions of the above-mentioned terminal device may be realized by hardware, or may be realized by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the structure of the communication device includes a processing module and a transceiver module, wherein the processing module is configured to support the communication device to execute any of the above-mentioned first, third, or fifth aspects of the design The corresponding function of the first terminal device in the first, or the corresponding function of the second terminal device in any of the above-mentioned second, fourth, or sixth aspects of the design.
  • the transceiver module is used to support the communication between the communication device and other communication devices. For example, when the communication device is the first terminal device, it can send the time slot configuration period and the first information to the second terminal device.
  • the communication device may also include a storage module, which is coupled with the processing module, which stores program instructions and data necessary for the communication device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory.
  • the memory may be integrated with the processor or may be provided separately from the processor, which is not limited in this application.
  • the structure of the communication device includes a processor and may also include a memory.
  • the processor is coupled with the memory, and can be used to execute the computer program instructions stored in the memory, so that the communication device executes the method in any possible design of the first, third, or fifth aspects, or executes the second Aspect, the fourth aspect, or any one of the possible design methods of the sixth aspect.
  • the communication device further includes a communication interface, and the processor is coupled with the communication interface.
  • the communication interface may be a transceiver or an input/output interface; when the communication device is a chip included in the terminal device, the communication interface may be an input/output interface of the chip.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or an instruction, when the program or instruction is executed by the processor , Enabling the chip system to implement the method in any one of the foregoing first, third, or fifth aspects, or implement any one of the foregoing second, fourth, or sixth aspects Method in.
  • processors in the chip system there may be one or more processors in the chip system.
  • the processor can be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be set on different chips.
  • the setting method of the processor is not specifically limited.
  • an embodiment of the present application provides a computer-readable storage medium, which stores computer-readable instructions.
  • the computer reads and executes the computer-readable instructions, the computer executes the first Aspect, the third aspect, or any one of the possible designs of the fifth aspect, or the implementation of any one of the foregoing second, fourth, or sixth aspects.
  • the embodiments of the present application provide a computer program product.
  • the computer reads and executes the computer program product, the computer executes any of the possible designs of the first, third, or fifth aspects above Or implement any of the above-mentioned second, fourth, or sixth aspects.
  • an embodiment of the present application provides a communication system, which includes the first terminal device and the second terminal device described above.
  • the communication system may also include network equipment.
  • FIG. 1 is a time slot format index table of configurable time slots provided by an embodiment of the application
  • FIG. 2 is a schematic diagram of a network architecture of a communication system to which an embodiment of this application is applicable;
  • FIG. 3 is a schematic flowchart of a side link communication method provided by an embodiment of this application.
  • FIG. 4 is a schematic structural diagram of a time slot configuration period provided by an embodiment of the application.
  • 5a to 5d are schematic diagrams of multiple sending modes of the first information, the second information, and the third information provided by the embodiments of this application;
  • FIG. 6 is a schematic flowchart of another side link communication method provided by an embodiment of this application.
  • FIG. 7 is a schematic flowchart of another side link communication method provided by an embodiment of this application.
  • FIG. 8 is a schematic diagram of time slots and side-line symbols used for side-line link transmission according to an embodiment of the application.
  • FIG. 9 is a schematic diagram of a time slot structure of a time slot used for sidelink transmission according to an embodiment of the application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 11 is a schematic diagram of another structure of a communication device according to an embodiment of the application.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE frequency division duplex FDD
  • TDD LTE Time division duplex
  • UMTS universal mobile telecommunication system
  • WIMAX worldwide interoperability for microwave access
  • 5G fifth generation
  • NR new radio
  • the technical solutions of the embodiments of the present application can be applied to unmanned driving (unmanned driving), driver assistance (ADAS), intelligent driving (intelligent driving), connected driving, and intelligent network driving (Intelligent Network Driving). ), car sharing (car sharing), smart/intelligent car, digital car, unmanned car/driverless car/pilotless car/automobile, Internet of vehicles (IoV) , Auto-driving car (autonomous car), cooperative vehicle infrastructure (CVIS), intelligent transportation (intelligent transport system, ITS), vehicle communication (vehicular communication) and other technical fields.
  • unmanned driving unmanned driving
  • ADAS driver assistance
  • intelligent driving intelligent driving
  • connected driving and intelligent network driving
  • Intelligent Network Driving Intelligent Network Driving
  • the technical solutions provided by the embodiments of the present application can be applied to cellular links, and can also be applied to links between devices, such as device-to-device (D2D) links.
  • D2D link or V2X link may also be called side link, auxiliary link or side link.
  • the aforementioned terms all refer to links established between devices of the same type, and have the same meaning.
  • the so-called devices of the same type can be the link between the terminal device and the terminal device, the link between the base station and the base station, and the link between the relay node and the relay node. This application The embodiment does not limit this.
  • V2X link For the link between the terminal device and the terminal device, there are D2D links defined by 3GPP version (Rel)-12/13, and there are also car-to-car, car-to-mobile, or car-to-any entity defined by 3GPP for the Internet of Vehicles.
  • V2X link including Rel-14/15. It also includes the V2X link based on the NR system of Rel-16 and subsequent versions that are currently being studied by 3GPP.
  • FIG. 2 is a schematic diagram of a network architecture of a communication system to which an embodiment of this application is applicable.
  • the communication system includes a terminal device 210 and a terminal device 220.
  • the terminal device and the terminal device can communicate directly through the PC5 interface, and the direct communication link between the terminal device and the terminal device is the side link.
  • Communication based on the side link can use at least one of the following channels: a physical sidelink shared channel (PSSCH) for carrying data; a physical sidelink control channel (physical sidelink) control channel, PSCCH), used to carry sidelink control information (SCI).
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • the communication system further includes a network device 230 for providing timing synchronization and resource scheduling for terminal devices.
  • the network device can communicate with at least one terminal device (such as the terminal device 210) through the Uu interface.
  • the communication link between the network equipment and the terminal equipment includes an uplink (UL) and a downlink (DL).
  • the terminal device and the terminal device can also realize indirect communication through network device forwarding.
  • the terminal device 210 can send data to the network device 230 through the Uu interface, and then send the data to the application server 240 through the network device 230 for processing, and then The application server 240 delivers the processed data to the network device 230 and sends it to the terminal device 220 through the network device 230.
  • the network device 230 that forwards the uplink data from the terminal device 210 to the application server 240 and the network device 230 that forwards the downlink data delivered by the application server 240 to the terminal device 220 may be the same network device, or It can be different network devices and can be determined by the application server.
  • the network device in FIG. 2 may be an access network device, such as a base station.
  • the access network equipment corresponds to different equipment in different systems, for example, in a 5G system, it corresponds to the access network equipment in 5G, such as gNB.
  • 5G such as gNB
  • the terminal device 210 and the terminal device 220 are shown in FIG. 2, it should be understood that the network device can provide services for multiple terminal devices, and the embodiment of the present application does not limit the number of terminal devices in the communication system.
  • the terminal device in FIG. 2 is described by taking a vehicle-mounted terminal device or a vehicle as an example.
  • the terminal device in the embodiment of the present application is not limited to this, and the terminal device may also be a vehicle-mounted module, a roadside unit, or Pedestrian handheld device. It should be understood that the embodiments of the present application are not limited to 4G or 5G systems, and are also applicable to subsequent evolved communication systems.
  • Terminal equipment also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • the terminal device may communicate with a core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal device may be a handheld device with a wireless connection function, a vehicle-mounted device, a vehicle user device, and so on.
  • terminal devices are: mobile phones (mobile phones), tablets, laptops, palmtop computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented Augmented reality (AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, and smart grid (smart grid)
  • the terminal device in the embodiments of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit that is built into a vehicle as one or more components or units. Modules, on-board components, on-board chips, or on-board units can implement the method of the present application.
  • Network equipment is the equipment used in the network to connect terminal equipment to the wireless network.
  • the network device may be a node in a radio access network, may also be called a base station, or may also be called a radio access network (RAN) node (or device).
  • the network device can be used to convert received air frames and Internet Protocol (IP) packets to each other, and act as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network.
  • IP Internet Protocol
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), such as
  • LTE long term evolution
  • LTE-A evolved LTE system
  • the traditional macro base station eNB and the micro base station eNB in the heterogeneous network scenario may also include the next generation node B (next generation) in the fifth generation mobile communication technology (5th generation, 5G) new radio (NR) system.
  • 5th generation, 5G fifth generation mobile communication technology
  • NR new radio
  • node B node B, gNB
  • TRP transmission reception point
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • baseband unit BBU
  • baseband pool BBU pool or WiFi access point (access point, AP), etc.
  • CU centralized unit
  • CU distributed unit
  • DU cloud radio access network
  • a network device in a V2X technology is a roadside unit (RSU).
  • the RSU may be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.
  • “Multiple” refers to two or more. In view of this, “multiple” may also be understood as “at least two” in the embodiments of the present application. "At least one” can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and it does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C are included. In the same way, the understanding of "at least one" and other descriptions is similar.
  • FIG. 3 is a schematic flowchart of a sidelink communication method according to an embodiment of this application.
  • the method includes the following steps S301 to S304:
  • Step S301 The first terminal device determines first information, which is used to indicate the time slot configuration period and the number of at least one uplink time slot in the time slot configuration period.
  • At least one uplink time slot may be included in the time slot configuration period. Further, the time slot configuration period may also include at least one configurable time slot, and/or at least one downlink time slot.
  • the configurable time slot in the embodiment of the present application may also be called a flexible time slot or a variable time slot, or may have other names, which is not limited by this application.
  • the time slot configuration period is used to indicate the number of currently configured time slots.
  • the time slot configuration period may also be referred to as the uplink and downlink TDD configuration period, or may have other names, which is not limited by this application.
  • the time slot configuration period may also be a configuration period of a time unit composed of time granularity of other lengths, and then the first information is used to indicate the time unit configuration period and at least one uplink time of the time unit configuration period.
  • the time unit composed of other length time granularity may include mini-slots, subframes, frames, and so on.
  • Table 1 is an index table of the time slot configuration period provided by the embodiment of the application.
  • the length of the time slot configuration period is variable.
  • one time slot configuration period may include 4 time slots or 16 time slots.
  • Time slots or 40 time slots can also include other numbers of time slots.
  • a time slot configuration period can include up to 80 time slots. Since the time slot configuration period shown in Table 1 has 10 possible lengths, at this time, the time slot configuration period can be indicated by at least 4 bits. It can be understood that when the value range of the length of the time slot configuration period is different, the number of bits used to indicate the time slot configuration period is also different. If the time slot configuration period is set to have more possible lengths, the time slot configuration period can be indicated by more bits, which is not limited in this application.
  • the time slots in this application may include three possible types: uplink time slots, downlink time slots and configurable time slots, and this application does not specifically limit the number of various types of time slots in a time slot configuration cycle.
  • one or more symbols may be included in one slot. All symbols in the uplink time slot are uplink symbols, and all symbols in the downlink time slot are downlink symbols.
  • Each symbol in the configurable time slot can be configured as an uplink symbol, a downlink symbol, or a flexible symbol. Flexible symbols can also be called configurable symbols or variable symbols, or have other names.
  • the uplink time slot in the time slot configuration period can be used for side link transmission.
  • Figure 4 exemplarily shows the structure of a time slot configuration period. If there are uplink time slots in a time slot configuration cycle, these uplink time slots can be placed continuously at the end of the time slot configuration cycle; if there are downlink time slots, these downlink time slots can be placed continuously at the front end of the time slot configuration cycle; The other time slots between the time slot and the downlink time slot are configurable time slots.
  • the first information indicates the number of at least one uplink time slot in the time slot configuration period, which is equivalent to indirectly indicating that at least one uplink time slot is included in the time slot configuration period.
  • the location of an upstream time slot In this way, by informing the second terminal device of the number of uplink time slots in the time slot configuration period, the second terminal device can know the specific location of these uplink time slots, so that the resources of these uplink time slots can be used for side-link communication.
  • the first information may also indicate the specific location of the uplink time slot in the time slot configuration period, for example, the specific location of the uplink time slot may be indicated by indicating the time slot number or a bit map. The first information may also indicate the specific position and number of uplink time slots in the time slot configuration period.
  • a time slot configuration cycle can include up to 80 time slots
  • the maximum number of uplink time slots in the time slot configuration cycle can be 80. Therefore, the number of at least one uplink time slot in the time slot configuration cycle can be at least 7-bit indication, plus the time slot configuration period can be indicated by at least 4 bits, and the first information can occupy at least 11 bits.
  • Step S302 The first terminal device sends the first information to the second terminal device.
  • the first terminal device may send the first information to the second terminal device by sending the first broadcast message, that is, the first terminal device may send the first broadcast message to the second terminal device, and in the first broadcast message
  • the message carries the first information.
  • the first broadcast message may be carried on a PSBCH channel.
  • the first broadcast message may be a synchronization signal block (synchronization signal block, SSB) message transmitted on a side link.
  • SSB synchronization signal block
  • Step S303 The second terminal device receives the first information from the first terminal device.
  • Step S304 The second terminal device performs sidelink communication with the first terminal device on the first resource, where the first resource includes a resource corresponding to at least one uplink time slot in the time slot configuration period.
  • the uplink time slot in the time slot configuration period can be used by the terminal device for sidelink communication. Therefore, the second terminal device can determine the time slot configuration period and the time according to the received first information. The number or position of at least one uplink time slot in the slot configuration period, and then the resources of these uplink time slots are used for side-link communication. For example, in a scenario where the first terminal device and the second terminal device are both vehicles or vehicle-mounted terminal devices, the second terminal device may send data representing its own speed, position, movement direction, intention and other information to the first terminal device.
  • the first terminal device may only send the first information to the second terminal device.
  • the first terminal device may send a first broadcast message to the second terminal device, and the first broadcast message includes only the first information.
  • the first terminal device only carries the first information used to indicate the time slot configuration period and the number of uplink time slots in the time slot configuration period in the first broadcast message, which can effectively save resource overhead while ensuring that the second terminal device can Use the resources of the uplink time slot in the time slot configuration period for side link communication.
  • the uplink symbols and/or flexible symbols in each configurable time slot in the time slot configuration period can also be used for side link communication.
  • the second terminal device can use the time slot The resources of the uplink time slot in the configuration period, and the resources of the uplink symbol and/or the flexible symbol in the configurable time slot perform side link communication.
  • the first terminal device can not only send the first information to the second terminal device, but also can send the second information and the third information to the second terminal device.
  • the second information is used to indicate the number of at least one configurable time slot in the time slot configuration period
  • the third information is used to indicate the type information of each symbol in the configurable time slot and the position information of the uplink symbol in the configurable time slot.
  • configurable time slots are successively set before at least one uplink time slot in the time slot configuration cycle, if the last configurable time slot of a group of continuously configured configurable time slots is not this time slot Configure the last time slot in the cycle, then the next time slot of the last configurable time slot must be an uplink time slot.
  • the structure of the time slot configuration cycle can be obtained, and at least one configurable included in the time slot configuration cycle can be obtained. The location of the time slot.
  • the first terminal device can notify the second terminal device of the position of at least one configurable time slot in the time slot configuration period by sending the second information, and notify the second terminal device of the location of at least one configurable time slot in the time slot configuration period by sending the third information.
  • the second terminal device can use uplink symbols and/or flexible symbol resources in the configurable time slots in the time slot configuration period to perform sidelink communication, thereby increasing communication opportunities and enabling the configuration of uplink and downlink TDD to reach The granularity of the symbols makes the configuration more flexible.
  • the third information is specifically used to indicate the configuration of some or all of the uplink and downlink symbols in the configurable time slot, and the configuration of the uplink and downlink symbols can be understood as the internal structure or the time slot format of the configurable time slot.
  • the number and positions of uplink symbols, downlink symbols, and flexible symbols included in each configurable time slot in a time slot configuration cycle can be the same, that is, the number and position of each configurable time slot in a time slot configuration cycle
  • the slot format can be the same.
  • Manner 1 The third information is used to indicate the type information of each symbol in the configurable time slot.
  • the symbol type information may refer to whether a symbol is an uplink symbol, a downlink symbol or a flexible symbol.
  • This indication method of the third information can be applied to only the uplink symbols in the configurable time slot used for side link communication, and the flexible symbols in the configurable time slot cannot be determined by the second terminal device to be used for uplink communication. It is still downlink and cannot be used in side-link communication scenarios. Or, it can also be applied to a scenario where both uplink symbols and flexible symbols in the configurable time slot can be used for sidelink communication, which is not limited in this application.
  • the third information may be complete slot format indicator (SFI) information, for example, as shown in FIG. 1
  • SFI slot format indicator
  • a time slot includes 14 symbols
  • a configurable time slot has 256 possible time slot formats, indicating that the type information of each symbol in the configurable time slot requires at least 8 bits, that is, the third information at this time It can occupy at least 8 bits.
  • Manner 2 The third information is used to indicate the position information of the uplink symbol in the configurable time slot.
  • This indication method of the third information is applicable to only the uplink symbols in the configurable time slot are used for side-link communication. Since the flexible symbols in the configurable time slot cannot be determined by the second terminal device whether it is used for uplink or Downlink, and cannot be used in side-link communication scenarios. In this scenario, for the second terminal device, it does not need to know the type information of all symbols in the configurable time slot, and may only care about the position of the uplink symbol that can be used for sidelink communication in the configurable time slot.
  • the uplink symbols that can be used for side-link communication in the configurable time slot have 13 possible position arrangements as shown in Table 2 below.
  • the position arrangement of each uplink symbol shown in Table 2 can correspond to one or more time slot formats shown in Figure 1, where the index of the time slot format is equivalent to the complete SFI information or the time slot format in Figure 1. format.
  • the third information can be understood as simplified SFI information, for example, it can be the position index of the uplink symbol shown in Table 2. Since the uplink symbols that can be used for side-link communication have 13 possible location arrangements, the location information indicating the uplink symbols in the configurable time slot requires at least 4 bits, that is, the third information can occupy at least 4 bits at this time. Compared with the complete 8-bit SFI information in mode 1, the data length can be reduced by half and the reliability of transmission can be improved.
  • Manner 3 The third information is used to indicate the number of uplink symbols in the configurable time slot.
  • This indication method of the third information is applicable to only the uplink symbols in the configurable time slot are used for side-link communication. Since the flexible symbols in the configurable time slot cannot be determined by the second terminal device whether it is used for uplink or Downlink, and cannot be used in side-link communication scenarios. For the second terminal device, it does not need to know the type information of all symbols in the configurable time slot, and may only care about the position of the uplink symbol that can be used for sidelink communication in the configurable time slot.
  • this indication method also requires that the position of the uplink symbol in a time slot has a certain setting rule.
  • the uplink symbol can be continuously configured from the beginning or the end of the time slot, so that the first terminal device can
  • the third information indirectly indicates the position of the uplink symbol in the configurable time slot, and then uses the resources of the uplink symbol in the configurable time slot to perform side-link communication.
  • Manner 4 The third information is used to indicate the position information of the uplink symbol and the flexible symbol in the configurable time slot.
  • This indication of the third information is suitable for scenarios where both uplink symbols and flexible symbols in the configurable time slot can be used for side-link communication.
  • the second terminal device it does not need to know the type information of all symbols in the configurable time slot, and can only care about the uplink symbols and/or the uplink symbols that can be used for sidelink communication in the configurable time slot. Flexible symbol location.
  • the combination of uplink symbols and flexible symbols that can be used for side-link communication in the configurable time slot has 10 possible position arrangements as shown in Table 3 below.
  • the position arrangement of each uplink symbol and flexible symbol shown in Table 3 can correspond to one or more time slot formats shown in Figure 1, where the index of the time slot format is equivalent to the complete SFI information or graph The format in 1.
  • Table 3 Position index table of uplink symbols and/or flexible symbols in configurable time slots
  • the third information can be understood as simplified SFI information, for example, the uplink symbols and/or flexible symbols shown in Table 3 The position index of the symbol. Since the combination of uplink symbols and/or flexible symbols that can be used for side-link communication has 10 possible location arrangements, at least 4 bits are required to indicate the location information of uplink symbols and/or flexible symbols in a configurable time slot. That is, the third information can occupy at least 4 bits at this time. Compared with the complete SFI information that requires 8 bits in mode 1, the data length can be reduced by half, and the transmission reliability can be improved.
  • the second information and the third information in the embodiments of the present application have multiple possible sending modes.
  • the first terminal device may send the second information and the third information through a first broadcast message; or, the first terminal device may send the second information through a first broadcast message by using a system information block (SIB).
  • SIB system information block
  • RRC radio resource control
  • the first terminal device sends the second information and the third information through a SIB message or an RRC message.
  • the first broadcast message involved in the embodiment of the present application may be carried on the PSBCH channel.
  • the first broadcast message may be a synchronization signal block (synchronization signal block, SSB) message transmitted on a side link, SIB
  • the message may be a PC5 SIB message or other types of SIB messages
  • the RRC message may be a PC5 RRC message or other types of RRC messages, which are not specifically limited in this application.
  • the first information, the second information, and the third information in the embodiments of the present application may be transmitted in the same message, or may be transmitted in different messages, which is not limited by this application.
  • the first terminal device may send a first broadcast message to the second terminal device, and the first broadcast message includes first information, second information, and third information.
  • the first terminal device may send a first broadcast message to the second terminal device, and the first broadcast message includes the first information and the second information, and the first terminal device may also send an RRC message to the second terminal device.
  • the RRC message includes third information.
  • the first terminal device may send a first broadcast message to the second terminal device, the first broadcast message includes the first information, and the first terminal device may also send an RRC message to the second terminal device, and the RRC message includes Second information and third information.
  • the first terminal device may send a first broadcast message to the second terminal device, the first broadcast message includes the first information, and the first terminal device may also send an RRC message to the second terminal device, and the RRC message includes
  • the second information the first terminal device may also send a SIB message to the second terminal device, and the SIB message includes the third information.
  • Figures 5a to 5d exemplarily show multiple sending modes of the first information, the second information, and the third information in an embodiment of the present application.
  • the first terminal device may send the first information through the SSB message carried on the PSBCH, and send the second information and the third information through the SIB message or the RRC message.
  • the time slot configuration period, the position of at least one uplink time slot in the time slot configuration period, and at least one configurable time slot in the time slot configuration period can be directly or indirectly indicated respectively.
  • the second terminal device can use the uplink time slot in the time slot configuration period and the resources of the uplink symbol and/or flexible symbol in the configurable time slot for side link communication. Since the time slot configuration cycle can be indicated by 4 bits, and the number of uplink time slots in the time slot configuration cycle can be indicated by 7 bits, therefore, in this transmission mode, the PSBCH only needs to carry 11 bits of information, which can guarantee the PSBCH The low bit rate of PSBCH improves the decoding success rate of PSBCH, thereby improving the reliability of transmission.
  • the first terminal device may send the first information and the second information through the SSB message carried on the PSBCH, and send the third information through the SIB message or the RRC message.
  • the time slot configuration period, the position of at least one uplink time slot in the time slot configuration period, and at least one configurable time slot in the time slot configuration period can be directly or indirectly indicated respectively.
  • the PSBCH only needs to carry 18 bits of information, which can ensure the low code rate of the PSBCH, improve the decoding success rate of the PSBCH, and thereby improve the reliability of transmission.
  • the first terminal device can send the first information, the second information, and the third information through the SSB message carried on the PSBCH.
  • the time slot configuration period, the position of at least one uplink time slot in the time slot configuration period, and at least one configurable time slot in the time slot configuration period can be directly or indirectly indicated respectively.
  • the time slot configuration cycle can be indicated by 4 bits
  • the number of uplink time slots in the time slot configuration cycle can be indicated by 7 bits
  • the number of configurable time slots in the time slot configuration cycle can be indicated by 7 bits.
  • the third information indicates the type of each symbol in the configurable time slot (that is, the time slot format of the configurable time slot)
  • the third information can be indicated by 8 bits. At this time, a total of 26 bits of information need to be carried in the PSBCH .
  • the third information indicates the position of the uplink symbol in the configurable time slot, the third information can be indicated by 4 bits. At this time, a total of 22 bits of information need to be carried in the PSBCH.
  • the third information When the third information indicates the number of uplink symbols in the configurable time slot, the third information can be indicated by 4 bits. At this time, a total of 22 bits of information need to be carried in the PSBCH.
  • the third information When the third information indicates the position of the uplink symbol and/or the flexible symbol in the configurable time slot, the third information may be indicated by 4 bits. At this time, a total of 22 bits of information need to be carried in the PSBCH. It can be seen that in the several indication methods of the third information, the number of bits of the information that needs to be carried in the PSBCH is less than 32 bits. Therefore, the low code rate of the PSBCH can be guaranteed, and the success rate of PSBCH decoding can be improved, thereby increasing Reliability of transmission.
  • the first terminal device may send the first information through the SSB message carried on the PSBCH, and no longer send the second information and the third information through the SIB message or the RRC message.
  • the time slot configuration period can be directly indicated, and the position of the uplink time slot in the time slot configuration period can be indirectly indicated, so that the second terminal device can use the time slot configuration period.
  • the resources of the uplink time slot are used for side link communication.
  • the time slot configuration period can be indicated by 4 bits, and the number of uplink time slots in the time slot configuration period can be indicated by 7 bits.
  • the PSBCH needs to carry 11 bits of information. Therefore, the low code of the PSBCH can be guaranteed. It can improve the decoding success rate of PSBCH, thereby improving the reliability of transmission and saving signaling overhead.
  • time slots involved in the embodiments of this application may also be other time granularity in the time domain, such as radio frames, subframes, mini-slots, mini-slots, etc., which are not specifically limited in this application.
  • FIG. 6 is a schematic flowchart of another sidelink communication method according to an embodiment of this application.
  • the method includes the following steps S601 to S604:
  • Step S601 The first terminal device determines seventh information, eighth information, and ninth information, where the seventh information is used to indicate a time slot configuration period.
  • the time slot configuration period includes at least one uplink time slot and at least one configurable time slot.
  • Time slot, the eighth information is used to indicate the number of at least one configurable time slot in the time slot configuration period, and the ninth information is used to indicate that the first configurable time slot in the time slot configuration period is relative to the time slot configuration period.
  • the offset value of the first time slot is used to be a time slot.
  • the difference between the time slot configuration period in the embodiment of this application and the time slot configuration period in Embodiment 1 is that the time slot configuration period in the embodiment of this application may include at least one uplink time slot and at least one configurable time slot, and The time slot configuration period in the first embodiment may only include at least one uplink time slot, or may include at least one uplink time slot and at least one configurable time slot.
  • Other specific implementations of the time slot configuration period in the embodiment of the present application may be the same as in the first embodiment, and will not be repeated here.
  • the first information in the first embodiment is used to indicate the time slot configuration period and the number of uplink time slots in the time slot configuration period. Since the uplink time slots are successively arranged at the end of the time slot configuration period, the first information can indirectly indicate the position of the uplink time slot in the time slot configuration period. Similarly, as shown in Figure 4, the downlink time slots are successively set at the front end of the time slot configuration period, and the configurable time slots are successively set after the downlink time slot and before the uplink time slot.
  • the number of at least one configurable time slot in the time slot configuration cycle and the offset value of the first configurable time slot relative to the first time slot in the time slot configuration cycle can be directly and without doubt to determine the time The structure of the slot configuration period.
  • the time slot configuration cycle can be directly determined
  • the position of the configurable time slot, and then according to the downlink time slot is continuously set before the configurable time slot and the uplink time slot is continuously set after the configurable time slot, the positions of the downlink time slot and the uplink time slot can be derived.
  • Table 4 exemplarily shows the offset value of the first configurable time slot in the time slot configuration cycle relative to the first time slot in the time slot configuration cycle, and the possible configurable time slot under the offset value. Configure the maximum number of time slots.
  • Table 4 The offset value and number of configurable time slots that may exist in a time slot configuration cycle
  • the maximum offset value of the first configurable time slot in a time slot configuration cycle relative to the first time slot in the time slot configuration cycle is 79. Therefore, the offset value requires at least 7 bits. Indicates that the ninth information needs to occupy at least 7 bits.
  • the value of the configurable time slot that can be accommodated in the time slot configuration period The maximum number is smaller.
  • the maximum number of configurable time slots that may exist in a time slot configuration cycle is 80, and the number of configurable time slots needs to be indicated by at least 7 bits, that is, the eighth information needs to occupy at least 7 bits.
  • the time slot configuration period has 10 possible lengths and needs to be indicated by at least 4 bits, that is, the seventh information occupies at least 4 bits.
  • Step S602 The first terminal device sends seventh information, eighth information, and ninth information to the second terminal device.
  • the first terminal device may send the seventh information, the eighth information, and the ninth information through the first broadcast message.
  • the first broadcast message may be carried on a PSBCH channel.
  • the first broadcast message may be a synchronization signal block (synchronization signal block, SSB) message transmitted on a side link.
  • SSB synchronization signal block
  • the time slot configuration period can be indicated by 4 bits, and the number of configurable time slots in the time slot configuration period can be indicated by 7 bits, the offset of the first configurable time slot relative to the first time slot in the time slot configuration period The shift value can also be indicated by 7 bits. Therefore, the PSBCH needs to carry 18 bits of information. Therefore, the low code rate of the PSBCH can be guaranteed, the decoding success rate of the PSBCH can be improved, and the transmission reliability can be improved.
  • Step S603 The second terminal device receives seventh information, eighth information, and ninth information from the first terminal device.
  • Step S604 The second terminal device performs sidelink communication with the first terminal device on the first resource, where the first resource includes a time domain resource corresponding to at least one uplink time slot in the time slot configuration period.
  • the second terminal device After receiving the seventh, eighth, and ninth information, the second terminal device can determine the position of the uplink time slot in the time slot configuration period, and then use the resources of these uplink time slots to perform sidelink communication.
  • the first terminal device may also send the tenth information to the second terminal device
  • the tenth information is used to indicate the type information of each symbol in the configurable time slot, the position information of the uplink symbol in the configurable time slot, the number of uplink symbols in the configurable time slot, and the flexible information in the configurable time slot. At least one of the position information of the symbol and the uplink symbol.
  • the first resource also includes resources corresponding to uplink symbols and/or flexible symbols in at least one configurable time slot in the time slot configuration period, and the second terminal device can further use this part of resources for sidelink communication.
  • the first terminal device sends the tenth information through a system information block SIB message or a radio resource control RRC message, which is not specifically limited in this application.
  • the specific implementation of the tenth information may be similar to the third information in Embodiment 1, and will not be repeated here.
  • FIG. 7 is a schematic flowchart of another sidelink communication method according to an embodiment of this application.
  • the method includes the following steps S701 to S704:
  • Step S701 The first terminal device determines fourth information and fifth information, where the fourth information is used to indicate a time slot configuration period, and the time slot configuration period may include at least one uplink time slot and/or at least one configurable time slot.
  • the fifth information is used to indicate the position of the time slot used for side-link transmission in the time slot configuration period, and the time slot used for side-link transmission includes uplink time slot and/or configurable time slot.
  • Step S702 The first terminal device sends fourth information and fifth information to the second terminal device.
  • Step S703 The second terminal device receives the fourth information and the fifth information from the first terminal device.
  • Step S704 The second terminal device performs sidelink communication with the first terminal device on a first resource, where the first resource includes a resource corresponding to a time slot used for sidelink transmission in the time slot configuration period.
  • the difference between the time slot configuration period in the embodiment of this application and the time slot configuration period in Embodiment 1 is that the time slot configuration period in the embodiment of this application may include at least one uplink time slot and at least one configurable time slot, and The time slot configuration period in the first embodiment may only include at least one uplink time slot, or may include at least one uplink time slot and at least one configurable time slot.
  • Other specific implementations of the time slot configuration period in the embodiment of the present application may be the same as in the first embodiment, and will not be repeated here.
  • the uplink time slot in the time slot configuration period and the uplink symbols and/or flexible symbols in the configurable time slot in the time slot configuration period can be used for side-link communication.
  • a terminal device can directly or indirectly indicate the location of these uplink time slots, uplink symbols in configurable time slots, and/or flexible symbols to the second terminal device, and the second terminal device can use the resources of these time slots or symbols to perform Side link communication.
  • the first terminal device may send fifth information to the second terminal device to clearly indicate which time slots in the time slot configuration period can be used for sidelink transmission, where the indicated
  • the time slots used for sidelink transmission may include uplink time slots and/or configurable time slots.
  • the first terminal device can configure part or all of the uplink time slots in the time slot configuration period as time slots for sidelink transmission, or can configure part or all of the uplink time slots in the time slot configuration period.
  • the configuration time slot is configured as a time slot for sidelink transmission.
  • the second terminal device uses the indicated resource of the time slot used for side-link transmission to perform side-link communication. In FIG.
  • Uu configuration represents the time slot configuration configured by the network device for the first terminal device and applied to the Uu interface between the first terminal device and the network device.
  • Uu-SL configuration represents the time slot configuration on the PC5 interface performed by the first terminal device based on the time slot configuration on the Uu interface, that is, the time slot configuration used for sidelink communication.
  • the first terminal device may send the fourth information through the first broadcast message, and send the fifth information through the SIB message or the RRC message.
  • the first broadcast message may be carried on a PSBCH channel.
  • the first broadcast message may be a synchronization signal block (synchronization signal block, SSB) message transmitted on a side link.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message, which is not specifically limited in this application.
  • the fifth information in the embodiment of the present application may be the first bitmap or the first bitmap used to indicate whether each time slot in the time slot configuration period is a time slot for sidelink transmission.
  • the corresponding index value For example, in a scenario where 80 time slots can be included in a time slot configuration period, the first bitmap can include 80 bits, and each bit is used to indicate whether the corresponding time slot is used for sidelink transmission. For example, when the bit value is 1, it can indicate that the corresponding time slot is used for side-link transmission, and when the bit value is 0, it can indicate that the corresponding time slot is not used for side-link transmission.
  • the time slot used for sidelink transmission may also be referred to as a sidelink slot, or may have other names, which is not limited in this application.
  • the side slot may include at least one sidelink symbol. In this embodiment of the present application, only the side link symbol in the side slot can be used by the second terminal device for sidelink transmission.
  • the first terminal device may further uplink part or all of the uplink time slot.
  • the symbols are configured as side-line symbols.
  • the first terminal device may further include some or all of the uplink symbols in the configurable time slot.
  • some or all of the flexible symbols are configured as side-line symbols.
  • the first terminal device may also send sixth information to the second terminal device, where the sixth information is used to indicate the position of the side line symbol in each time slot used for side line link transmission.
  • the first terminal device may send the sixth information through a SIB message or an RRC message.
  • the SIB message may be a PC5 SIB message
  • the RRC message may be a PC5 RRC message, which is not limited in this application.
  • the fifth information and the sixth information can be transmitted in the same message or in different messages. This application is not limited.
  • the first terminal device may send an RRC to the second terminal device. Message, the RRC message includes fifth information and sixth information.
  • the sixth information may include a second bitmap used to indicate whether each symbol in each time slot used for side-link transmission is a side-line symbol or an index value corresponding to the second bitmap, for example, at a time
  • the second bitmap may include 14 bits, and each bit is used to indicate whether the corresponding symbol is a side row symbol. For example, when the bit value is 1, it can indicate that the corresponding symbol is a side row. Symbol. When the bit value is 0, it can indicate that the corresponding symbol is not a sideline symbol.
  • the sixth information may also include slot format indication SFI information or an index value corresponding to the SFI information, and the SFI information is used to indicate the type of each symbol in each slot used for sidelink transmission. That is to say, the sixth information can also directly indicate the time slot format of each time slot used for sidelink transmission.
  • the sixth information may also include simplified SFI information indicating the position of the side line symbol in each time slot used for side line link transmission.
  • the sixth information includes the index value corresponding to the second bitmap
  • the number of possible time slot formats determines the number of bits occupied by the index value corresponding to the second bitmap.
  • the sixth information includes SFI information used to indicate the type information of each symbol in each time slot used for side link transmission
  • the SFI information may be specifically used to indicate that the time slot used for side link transmission is Which time slot format is pre-configured. For example, as shown in Figure 9, the time slot format of the time slot used for side-link transmission can be one of the six time slot formats shown in Figure 9. Because there are 6 options in total, the SFI information can occupy at least 3 bits.
  • the first terminal device may also send information indicating the structure of the time slot configuration period to the second terminal device, for example, the first terminal device.
  • information indicating the structure of the time slot configuration period may also send information indicating the structure of the time slot configuration period to the second terminal device, for example, the first terminal device.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the application.
  • the communication device 1000 includes a transceiver module 1010 and a processing module 1020.
  • the communication device can be used to implement the functions related to the first terminal device or the second terminal device in any of the foregoing method embodiments.
  • the communication device may be a terminal device, such as a handheld terminal device, a vehicle-mounted terminal device, etc.; the communication device may also be a chip included in the terminal device, or the communication device may be a vehicle-mounted device, such as a vehicle-mounted module built in a car Or on-board unit.
  • the processing module 1020 is used to determine the first information, and the first information is used to indicate the time slot configuration period and the time slot configuration period. The number of at least one uplink time slot; the transceiver module 1010 is used to send the first information to the second terminal device.
  • the transceiver module 1010 is further configured to send second information and third information to the second terminal device, where the second information is used to indicate the status of at least one configurable time slot in the time slot configuration period.
  • the third information is used to indicate at least one of the following information: the type information of each symbol in the configurable time slot; the position information of the uplink symbol in the configurable time slot; or, the number of uplink symbols in the configurable time slot Information; or, the position information of uplink symbols and flexible symbols in the time slot can be configured.
  • the transceiver module 1010 is further configured to: send the first information through the first broadcast message; send the second information and the third information through the first broadcast message; or send the second information through the SIB message or the RRC message. Information and third information; or, send the second information through the first broadcast message, and send the third information through the SIB message or the RRC message.
  • the transceiver module 1010 is used to receive first information from the first terminal device, and the first information is used to indicate the time slot configuration period and the time slot. Configure the number of at least one uplink time slot in the period; the processing module 1020 is configured to perform side-link communication with the first terminal device on the first resource through the transceiver module 1010, and the first resource includes the corresponding at least one uplink time slot H.
  • the transceiver module 1010 is further configured to receive second information and third information from the first terminal device, where the second information is used to indicate the status of at least one configurable time slot in the time slot configuration period.
  • the third information is used to indicate at least one of the following information: the type information of each symbol in the configurable time slot; the position information of the uplink symbol in the configurable time slot; or, the number of uplink symbols in the configurable time slot Information; or, the position information of uplink symbols and flexible symbols in the time slot can be configured.
  • the transceiver module 1010 is further configured to: receive the first information through the first broadcast message; receive the second information and the third information through the first broadcast message; or, receive the second information through the SIB message or the RRC message. Information and third information; or, the second information is received through the first broadcast message, and the third information is received through the SIB message or the RRC message.
  • the processing module 1020 is used to determine the seventh, eighth, and ninth information; the transceiver module 1010 is used to send the second terminal device Send seventh, eighth, and ninth information.
  • the seventh information is used to indicate the time slot configuration period.
  • the time slot configuration period includes at least one uplink time slot and at least one configurable time slot.
  • the eighth information is used for To indicate the number of at least one configurable time slot in the time slot configuration cycle, the ninth information is used to indicate the deviation of the first configurable time slot in the time slot configuration cycle relative to the first time slot in the time slot configuration cycle Shift value.
  • the transceiver module 1010 is further configured to send tenth information to the second terminal device, where the tenth information is used to indicate at least one of the following information: the type information of each symbol in the configurable time slot , The position information of the uplink symbol in the configurable time slot, the quantity information of the uplink symbol in the configurable time slot, the position information of the uplink symbol and the flexible symbol in the configurable time slot.
  • the transceiver module 1010 is also used to: send the seventh, eighth, and ninth information through the first broadcast message; send the tenth information through the first broadcast message, or through the system information block
  • the tenth information is sent by the SIB message or the radio resource control RRC message.
  • the transceiver module 1010 is used to receive seventh, eighth, and ninth information from the first terminal device, and the seventh information is used for In order to indicate the time slot configuration cycle, the time slot configuration cycle includes at least one uplink time slot and at least one configurable time slot, the eighth information is used to indicate the number of at least one configurable time slot in the time slot configuration cycle, and the first Nine information is used to indicate the offset value of the first configurable time slot in the time slot configuration period relative to the first time slot in the time slot configuration period; the processing module 1020 is used to communicate with the first resource through the transceiver module 1010 The first terminal device performs sidelink communication, and the first resource includes a resource corresponding to at least one uplink time slot in the time slot configuration period.
  • the transceiver module 1010 is further configured to receive tenth information from the first terminal device, and the tenth information is used to indicate at least one of the following information: the type information of each symbol in the configurable time slot , The position information of the uplink symbol in the configurable time slot, the quantity information of the uplink symbol in the configurable time slot, the position information of the uplink symbol and the flexible symbol in the configurable time slot.
  • the transceiver module 1010 is specifically configured to receive the seventh, eighth, and ninth information through the first broadcast message; to receive the tenth information through the first broadcast message, or the system information block SIB The tenth information is received by a message or a radio resource control RRC message.
  • the processing module 1020 is used to determine the fourth information and the fifth information.
  • the fourth information is used to indicate the time slot configuration period.
  • the slot configuration period includes at least one uplink time slot and/or at least one configurable time slot.
  • the fifth information is used to indicate the position of the time slot used for side-link transmission in the time slot configuration period.
  • the time slots for uplink transmission include uplink time slots and/or configurable time slots; the transceiver module 1010 is used to send the fourth information and the fifth information to the second terminal device.
  • the transceiver module 1010 is further configured to send sixth information to the second terminal device, where the sixth information is used to indicate the position of the side line symbol in each time slot used for side line link transmission.
  • the transceiver module 1010 is further configured to: send the fourth information through the first broadcast message, send the fifth information through the system information block SIB message or the radio resource control RRC message, and send the second information through the SIB message or RRC message.
  • the transceiver module 1010 is further configured to: send the fourth information through the first broadcast message, send the fifth information through the system information block SIB message or the radio resource control RRC message, and send the second information through the SIB message or RRC message.
  • the transceiver module 1010 is used to receive fourth information and fifth information from the first terminal device, and the fourth information is used to indicate the time slot A configuration period, where the time slot configuration period includes at least one uplink time slot and/or at least one configurable time slot, and the fifth information is used to indicate the position of the time slot used for side link transmission in the time slot configuration period,
  • the time slots used for sidelink transmission include uplink time slots and/or configurable time slots;
  • the processing module 1020 is configured to perform sidelink communication with the first terminal device on the first resource through the transceiver module 1010,
  • the first resource includes a resource corresponding to a time slot used for side link transmission in a time slot configuration period.
  • the transceiver module 1010 is further configured to receive sixth information from the first terminal device, and the sixth information is used to indicate the position of the side line symbol in each time slot used for side line link transmission.
  • the transceiver module 1010 is further configured to: receive the fourth information through the first broadcast message, receive the fifth information through the system information block SIB message or the radio resource control RRC message, and receive the second information through the SIB message or RRC message. Six information.
  • the processing module 1020 involved in the communication device may be implemented by a processor or processor-related circuit components, and may be a processor or a processing unit; the transceiver module 1010 may be implemented by a transceiver or transceiver-related circuit components, and may be a transceiver or transceiver. unit.
  • the operations and/or functions of each module in the communication device are used to implement the corresponding procedures of the methods shown in FIGS. 3, 5a to 5d, 6 and 7 respectively. For the sake of brevity, details are not repeated here.
  • FIG. 11 is another schematic structural diagram of a communication device provided in an embodiment of this application.
  • the communication device may specifically be a terminal device. It is easy to understand and easy to illustrate.
  • the terminal device uses a mobile phone as an example.
  • the terminal device includes a processor, and may also include a memory, and of course, it may also include a radio frequency circuit, an antenna, an input/output device, and the like.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • only one memory and processor are shown in FIG. 11. In actual terminal equipment products, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving unit of the terminal device
  • the processor with the processing function can be regarded as the processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1110 and a processing unit 1120.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1110 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1110 as the sending unit, that is, the transceiver unit 1110 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, receiver, or receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • transceiving unit 1110 is used to perform sending and receiving operations on the terminal device side in the foregoing method embodiment
  • processing unit 1120 is used to perform other operations on the terminal device in the foregoing method embodiment except for the transceiving operation.
  • An embodiment of the present application also provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or instruction, when the program or instruction is executed by the processor, the The chip system implements the method in any of the foregoing method embodiments.
  • processors in the chip system there may be one or more processors in the chip system.
  • the processor can be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be set on different chips.
  • the setting method of the processor is not specifically limited.
  • the chip system may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC). It can also be a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (microcontroller).
  • the controller unit, MCU may also be a programmable controller (programmable logic device, PLD) or other integrated chips.
  • each step in the foregoing method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the embodiment of the present application also provides a computer-readable storage medium, which stores computer-readable instructions, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute any of the foregoing method embodiments Method in.
  • the embodiments of the present application also provide a computer program product.
  • the computer reads and executes the computer program product, the computer is caused to execute the method in any of the foregoing method embodiments.
  • An embodiment of the present application also provides a communication system, which includes a first terminal device and a second terminal device.
  • the communication system may also include network equipment.
  • processors mentioned in the embodiments of this application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), or application specific integrated circuits ( application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM, DR RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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

Abstract

L'invention concerne un procédé et un appareil de communication de liaison latérale applicables aux domaines de la V2X, des l'Internet de véhicules, des véhicules connectés intelligents, de l'aide à la conduite, de la conduite intelligente, etc. Le procédé comprend les étapes suivantes : un premier dispositif terminal détermine des premières informations, et envoie les premières informations à un second dispositif terminal, les premières informations étant utilisées pour indiquer une période de configuration d'intervalle et le nombre d'au moins un intervalle de liaison montante dans la période de configuration d'intervalle. Comme l'intervalle de liaison montante dans la période de configuration d'intervalle peut être utilisé pour une transmission de liaison latérale, le premier dispositif terminal peut indiquer directement ou indirectement, grâce à l'envoi des premières informations, la période de configuration d'intervalle et la position de l'intervalle de liaison montante dans la période de configuration d'intervalle, ce qui permet de réaliser une communication de liaison latérale. De plus, le nombre de bits requis pour indiquer la période de configuration d'intervalle et le nombre d'intervalles de liaison montante dans la période de configuration d'intervalle est inférieur au nombre de bits d'information pouvant être reçus dans un PSBCH, de sorte qu'un faible débit de codage du PSBCH puisse être efficacement assuré et que la fiabilité de transmission puisse être améliorée.
PCT/CN2020/108297 2019-08-13 2020-08-10 Procédé et appareil de communication de liaison latérale WO2021027790A1 (fr)

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