WO2021027946A1 - Procédé de détermination d'indication d'état de configuration de transmission, canal de transmission et dispositif associé - Google Patents

Procédé de détermination d'indication d'état de configuration de transmission, canal de transmission et dispositif associé Download PDF

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Publication number
WO2021027946A1
WO2021027946A1 PCT/CN2020/109362 CN2020109362W WO2021027946A1 WO 2021027946 A1 WO2021027946 A1 WO 2021027946A1 CN 2020109362 W CN2020109362 W CN 2020109362W WO 2021027946 A1 WO2021027946 A1 WO 2021027946A1
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WIPO (PCT)
Prior art keywords
shared channel
physical shared
tci
time unit
tci state
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PCT/CN2020/109362
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English (en)
Chinese (zh)
Inventor
王明哲
杭海存
纪刘榴
施弘哲
毕晓艳
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华为技术有限公司
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Publication of WO2021027946A1 publication Critical patent/WO2021027946A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation

Definitions

  • This application relates to the field of communication technology, and in particular to a method for determining TCI status, a method for channel transmission, and related equipment.
  • the diversity gain of the channel in at least one dimension such as the time domain, the frequency domain, and the space domain can be used, so that the communication process can utilize these independent channels and reduce the influence of channel fading.
  • the base station needs to indicate to the terminal the transmission configuration indication (TCI) status of the channel between each base station and the terminal, so that the terminal can obtain the signal associated with the channel large-scale parameters of each physical shared channel.
  • TCI transmission configuration indication
  • This application provides a TCI state determination method, channel transmission method, system and related equipment, which can effectively improve the robustness of transmission.
  • this application discloses a method for determining the transmission configuration indication status. For K time units corresponding to K repeated transmissions, the transmission configuration indication state determination method determines that the TCI states associated with the same physical shared channel determined on at least two time units are different. In other words, the terminal can receive the same physical shared channel transmitted by different network devices corresponding to different TCI states. This avoids the problem that the same physical shared channel can only be transmitted by the same network device, and when the network device has a transmission power difference, the problem of poor reception performance of the physical shared channel is caused. It can be seen that this application can improve the robustness of transmission.
  • the method for determining the transmission configuration indication state includes: the terminal receives the transmission configuration indication TCI information; and according to the TCI information, determining the TCI state associated with the first physical shared channel on the first time unit and the second physical TCI status associated with the shared channel.
  • the first time unit is a time unit among K time units corresponding to K repeated transmissions.
  • the first physical shared channel and the second physical shared channel are transmitted in parallel on any one time unit.
  • At least two of the K time units have different TCI states associated with the same physical shared channel.
  • the K is an integer greater than or equal to 2.
  • each physical shared channel may be associated with different physical layer parameters.
  • the physical layer parameters include one or more of a data transmission layer (layer), an antenna port (antenna port), a code division multiplexing (CDM) group, and frequency domain resources. Therefore, the association relationship between the physical shared channel and the TCI state described in the embodiment of the present application may also be the association relationship between the physical layer parameters of the physical shared channel and the TCI state.
  • the antenna port may be a port for transmitting a physical shared channel, and may be called a demodulation reference signal (DMRS) port.
  • the frequency domain resource is the frequency domain resource indicated by the downlink control information for scheduling the physical shared channel.
  • the frequency domain resource can be a resource block (RB), a resource element (RE), and a resource block group (resource block). , RBG) or the frequency domain resource indicated in the frequency domain resource assignment (FD-RA) field in the downlink control information of the scheduling physical shared channel.
  • the different TCI states associated with the same physical shared channel may be: in at least two time units, the association relationship of each physical shared channel can satisfy a preset change rule .
  • the preset change rule may be a cyclic rule.
  • the association relationship between the first physical shared channel and the second physical shared channel on the second time unit is: the first physical shared channel is associated with the first TCI state, and the second physical shared channel is associated with the second TCI state.
  • the association relationship between the first physical shared channel and the second physical shared channel on the first time unit can be: the first TCI state and the second physical shared channel associated with the first physical shared channel on the second time unit
  • the second TCI state associated with the shared channel is obtained by flipping. That is, on the first time unit, the first physical shared channel is associated with the second TCI state, and the second physical shared channel is associated with the first TCI state.
  • the TCI information is used to indicate the first TCI status associated with the first physical shared channel in the second time unit among the K time units, and the status associated with the second physical shared channel The second TCI state. Furthermore, the terminal may determine the TCI state associated with each physical shared channel on other time units based on the preset change rule and the association relationship of each physical shared channel on the second time unit.
  • the TCI information can be carried by the TCI field in the DCI.
  • the TCI field may include an index value, and the index value may correspond to multiple TCI states on the second time unit in the TCI state table.
  • the association relationship between the multiple TCI states and the multiple physical shared channels on the second time unit may be determined based on the corresponding relationship between the index number or the identifier.
  • determining the TCI state associated with each physical shared channel on other time units may be specifically: cyclically shifting the multiple TCI states corresponding to the index value to obtain each physical shared channel on other time units Respectively associated TCI status.
  • the cyclic shift can be reversed or interchanged.
  • the terminal determines the TCI status associated with the first physical shared channel and the TCI status associated with the second physical shared channel on the first time unit according to the TCI information, including: the terminal uploads the second time unit, the first physical
  • the first TCI state associated with the shared channel is exchanged with the second TCI state associated with the second physical shared channel to obtain the second TCI state associated with the first physical shared channel on the first time unit and
  • the second physical shared channel is associated with the first TCI state. It can be seen that this implementation manner can reduce the signaling overhead required to indicate the TCI state associated with each physical shared channel on each time unit.
  • the TCI information is used to indicate the respective TCI states associated with the first physical shared channel and the second physical shared channel on each of the K time units.
  • the TCI information can be carried by the TCI field in the DCI.
  • the TCI field may include an index value, and the index value in the TCI state table may correspond to multiple TCI states on each of the K time units. In this way, the terminal can directly read the TCI state associated with each physical shared channel on each time unit from the TCI table, thereby reducing the processing burden of the terminal.
  • the association relationship between the physical shared channels on the first time unit and the association relationship between the physical shared channels on the second time unit satisfy the aforementioned preset change rule.
  • the first time unit may be a time unit adjacent to the second time unit.
  • the TCI state associated with each physical shared channel on each time unit may start with the second time unit, and the TCI states associated with each physical shared channel on successively adjacent time units all satisfy the above preset changes. rule.
  • the TCI status associated with each physical shared channel on the first time unit is the association of each physical shared channel on the second time unit.
  • the TCI state of each physical shared channel on the third time unit is obtained by cyclic shifting; the TCI state associated with each physical shared channel on the third time unit is obtained by cyclic shifting the TCI state associated with each physical shared channel on the first time unit.
  • the second time unit is the first time unit in the time domain among the K time units.
  • the aforementioned neighboring may be absolute neighboring.
  • the timing offset between the first time unit and the second time unit is 1.
  • the aforementioned neighboring may also be relatively neighboring.
  • the timing offset between the first time unit and the second time unit is greater than 1, but the time unit between the first time unit and the second time unit is not a time unit for repeated transmission, then in the embodiment of the present application
  • the first time unit and the second time unit may also be referred to as adjacent time units.
  • the first time unit may be an even-numbered time unit among the K time units
  • the second time unit may be an odd-numbered time unit among the K time units.
  • the TCI status associated with each physical shared channel on all even-numbered time units can be: the first TCI status and the second physical shared channel associated with the first physical shared channel on the second time unit
  • the second TCI state associated with the channel is exchanged or flipped according to the above cyclic rule. That is, the TCI state associated with each physical shared channel on all even-numbered time units is: the second TCI state associated with the first physical shared channel and the first TCI state associated with the second physical shared channel.
  • the K time units can be divided into at least two time unit groups, and the specific division rules can be determined by a protocol predefined or RRC configuration.
  • the at least two time unit groups include a first time unit group and a second time unit group, the first time unit group includes one or more first time units, and the second time unit group includes one or more second time units unit.
  • the TCI state associated with the physical shared channel on each time unit in the first time unit group may be the TCI state after the TCI state associated with each physical shared channel on the second time unit is reversed or exchanged.
  • the association relationship between the physical layer parameters of the physical shared channel and the TCI state may be: first data transmission The layer is associated with the first TCI state, the first antenna port is associated with the first TCI state, the first code division multiplexing group is associated with the first TCI state, or the first frequency domain resource is associated with the first TCI state.
  • first data transmission layer, the first antenna port, the first code division multiplexing group, and the first frequency domain resource are all physical layer parameters associated with the first physical shared channel.
  • the second physical shared channel on the second time unit is associated with the second TCI state, which may be: the second data transmission layer is associated with the second TCI state, the second antenna port is associated with the second TCI state, and the second code division The multiplexing group and the second TCI state, or the second frequency domain resource and the second TCI state.
  • the second data transmission layer, the second antenna port, the second code division multiplexing group, and the second frequency domain resource are all physical layer parameters associated with the second physical shared channel.
  • the association relationship between the physical shared channel and the TCI state can be extended to the above-mentioned association relationship between the physical layer parameters and the TCI state.
  • the association relationship between the physical shared channel and the TCI state can also be extended to the above-mentioned association relationship between the physical layer parameters and the TCI state.
  • the terminal can determine the TCI state associated with each physical shared channel on each time unit based on the various optional implementations described above, and then perform channel estimation on the associated physical shared channel based on the TCI state to receive The associated physical shared channel. Since the TCI state associated with each physical shared channel satisfies the above-mentioned preset change rule, there can be multiple channel estimation results corresponding to each physical shared channel, which is conducive to achieving robust transmission of each physical shared channel Sex.
  • this application provides a channel transmission method.
  • the first network device transmits the first physical shared channel and the second physical shared channel in at least two time units; the first network device sends transmission configuration indication TCI information; the TCI information is used to indicate The TCI state associated with the first physical shared channel and the second physical shared channel transmitted on the time unit; wherein, on the same time unit, the first physical shared channel and the second physical shared channel perform Multiplexing and respectively associated with different TCI states; on at least two different time units, the first physical shared channel and the second physical shared channel are associated with the same TCI state.
  • the association relationship between each physical shared channel and the TCI state may also satisfy the preset change rule described in the first aspect.
  • the first network device may send the first physical shared channel or the second physical shared channel in each time unit according to a preset change rule.
  • the first network device transmits different physical shared channels on at least two time units, thereby avoiding that the first network device transmits only the same physical shared channel on each time unit, resulting in the second
  • the physical shared channel transmitted by it has poor reception performance.
  • the TCI information is used to indicate the first TCI state associated with the first physical shared channel on the second time unit of the at least two time units, and the second physical shared channel The second TCI state associated with the channel.
  • the TCI information is used to indicate the first TCI state associated with the first physical shared channel on the second time unit of the at least two time units, and the second physical shared channel The second TCI state associated with the channel.
  • the TCI information is used to indicate the TCI state associated with the first physical shared channel and the second physical shared channel on each of the at least two time units.
  • the TCI information is used to indicate the TCI state associated with the first physical shared channel and the second physical shared channel on each of the at least two time units.
  • the TCI states respectively associated with the first physical shared channel and the second physical shared channel are based on an exchange rule to upload the second time unit,
  • the TCI states associated with the first physical shared channel and the second physical shared channel are exchanged.
  • the exchange rules are pre-defined by protocols or configured by radio resource control RRC.
  • the first time unit is a time unit adjacent to the second time unit among the at least two time units.
  • the first time unit is an even-numbered time unit of the at least two time units
  • the second time unit is an odd-numbered time unit of the at least two time units.
  • at least two time units can be divided into at least a first time unit group and a second time unit group, the first time unit group includes one or more first time units; the second time unit The group includes one or more second time units.
  • the first physical shared channel and the second physical shared channel are respectively associated with different physical layer parameters;
  • the physical layer parameters include: a data transmission layer (layer), an antenna port (antenna port) , Code division multiplexing CDM group, and one or more of frequency domain resources.
  • the physical layer parameters include: a data transmission layer (layer), an antenna port (antenna port) , Code division multiplexing CDM group, and one or more of frequency domain resources.
  • this application also provides a channel transmission system, including: a first network device, a second network device, and a terminal.
  • the first network device is configured to send transmission configuration indication TCI information; on a first time unit, send a first physical shared channel to the terminal; and on a second time unit, send the first physical shared channel to the terminal Two physical shared channels;
  • the second network device is configured to send a second physical shared channel to the terminal on a first time unit; and on a second time unit, send the first physical to the terminal Shared channel;
  • the first time unit and the second time unit are two of the K time units occupied by K repeated transmissions;
  • the K is an integer greater than or equal to 2; the same time On the unit, the first physical shared channel and the second physical shared channel are respectively associated with different TCI states; the first physical shared channel on the first time unit and all on the second time unit
  • the second physical shared channels are respectively associated with the same TCI state;
  • the first network device and the second network device send each physical shared channel in turn on the first time unit and the second time unit, and accordingly, the terminal can receive the same physical shared channel sent by different network devices. This avoids the problem of low robustness caused by only one network device transmitting the same physical shared channel.
  • the terminal is configured to receive the TCI information; and according to the TCI information, respectively determine the first physical shared channel and the second physical shared channel on the first time unit Respectively associated TCI status, and the TCI status respectively associated with the first physical shared channel and the second physical shared channel on the second time unit; the terminal is further configured to The TCI state associated with the first physical shared channel and the second physical shared channel is received, the first physical shared channel sent by the first network device in the first time unit, and the second 2.
  • the second physical shared channel sent by the network device; the terminal is further configured to receive according to the TCI states respectively associated with the first physical shared channel and the second physical shared channel on the second time unit On the second time unit, the second physical shared channel sent by the first network device, and the first physical shared channel sent by the second network device; the first time unit and the In the second time unit, the TCI state associated with the same physical shared channel is different. It can be seen that for the first time unit and the second time unit, the terminal can use different TCI states to receive the same physical shared channel. That is, the same physical shared channel received by the terminal can come from different network devices, and the same physical shared channel is associated with different TCI states.
  • the TCI information is used to indicate the first TCI state associated with the first physical shared channel, and the second TCI state associated with the second physical shared channel on the second time unit;
  • the TCI state associated with the first physical shared channel and the second physical shared channel is based on the exchange rule to upload the first physical shared channel and the second time unit to the second time unit.
  • the TCI states associated with the two physical shared channels are exchanged; the first time unit is a time unit adjacent to the second time unit.
  • the exchange rules are pre-defined by protocols or configured by radio resource control RRC.
  • the terminal is specifically configured to read the first TCI state associated with the first physical shared channel on the second time unit from the TCI information, and the second time unit.
  • how to determine the TCI state associated with each physical shared channel on each time unit can be referred to the related content described in the first aspect.
  • the TCI information is used to indicate the TCI state associated with the first physical shared channel and the second physical shared channel on each of the K time units.
  • the TCI information is used to indicate the TCI state associated with the first physical shared channel and the second physical shared channel on each of the K time units.
  • the first physical shared channel and the second physical shared channel are respectively associated with different physical layer parameters; the physical layer parameters include: data transmission layer layer, antenna port antenna port, code division multiplexing Use one or more of CDM groups and frequency domain resources.
  • the physical layer parameters include: data transmission layer layer, antenna port antenna port, code division multiplexing Use one or more of CDM groups and frequency domain resources.
  • this application also provides a method for determining the transmission configuration indication status.
  • the difference between the transmission configuration indication state determination method and the transmission configuration indication state determination method described in the first aspect is that the terminal interprets the TCI information sent by the network device in a different manner.
  • the terminal first interprets the TCI information corresponding to the index number in the time domain or the index number of the time unit, and then interprets the TCI status associated with the index number of the spatial resource or the frequency domain resource.
  • the terminal In the transmission configuration indication state determination method described in this aspect, the terminal first interprets the TCI information corresponding to the index number of the frequency domain resource or time domain resource, and then interprets the TCI status associated with the index number of the time domain resource or time unit.
  • the method for determining the transmission configuration indication status includes: the terminal receives the transmission configuration indication TCI information, and according to the TCI information, determines the TCI status associated with the first physical shared channel on the first time unit and the associated TCI status on the second time unit. TCI status.
  • the first time unit is a time unit among K time units corresponding to K repeated transmissions.
  • the TCI state associated with the first physical shared channel on the first time unit is different from the TCI state associated with the second time unit.
  • the TCI information is used to indicate the first TCI state associated with the second physical shared channel on the first time unit, and the second TCI state associated with the second time unit.
  • the terminal determines the TCI state associated with the first physical shared channel on the first time unit and the TCI state associated on the second time unit according to the TCI information, including: the terminal places the second physical shared channel on the first time unit
  • the first TCI state associated with the above is exchanged with the second TCI state associated with the second time unit to obtain the first physical shared channel associated with the second TCI state on the first time unit and its associated second TCI state on the second time unit.
  • a TCI status is used to indicate the first TCI state associated with the second physical shared channel on the first time unit, and the second TCI state associated with the second time unit.
  • the TCI information indicates the TCI information corresponding to the second physical shared channel in a complete transmission process. Then, the TCI information corresponding to the first physical shared channel in a complete transmission process can be obtained by cyclic shifting the TCI information corresponding to the second physical shared channel.
  • the TCI information is used to indicate the TCI status of each physical shared channel associated with each time unit.
  • the terminal can directly interpret the TCI information corresponding to each physical shared channel from the TCI information using frequency domain or spatial resources; and then interpret the TCI status of each physical shared channel associated with each time unit according to the time domain resources.
  • the present application also provides a terminal, which has some or all of the functions of the terminal in the method examples described in the first to fourth aspects.
  • the function of the terminal may have some or all of the functions in this application.
  • the functions in all the embodiments may also have the function of independently implementing any of the embodiments in this application.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above-mentioned functions.
  • the structure of the terminal may include a processing unit and a communication unit, and the processing unit is configured to support the terminal to perform corresponding functions in the foregoing method.
  • the communication unit is used to support communication between the terminal and other devices.
  • the terminal may also include a storage unit, which is configured to be coupled with the processing unit and the sending unit, and stores necessary program instructions and data for the terminal.
  • the terminal includes:
  • the communication unit is used to receive transmission configuration indication TCI information
  • a processing unit configured to determine the TCI status associated with the first physical shared channel and the TCI status associated with the second physical shared channel on the first time unit according to the TCI information
  • the first time unit is the time unit of the K time units corresponding to K repeated transmissions;
  • the K is an integer greater than or equal to 2;
  • the first physical shared channel and the second physical shared channel are at any time Parallel transmission on the unit;
  • At least two of the K time units have different TCI states associated with the same physical shared channel.
  • the terminal includes:
  • the communication unit is used to receive transmission configuration indication TCI information
  • the processing unit is configured to determine the TCI status associated with the first physical shared channel on the first time unit and the TCI status associated on the second time unit according to the TCI information.
  • the first time unit is a time unit among K time units corresponding to K repeated transmissions.
  • the TCI state associated with the first physical shared channel on the first time unit is different from the TCI state associated with the second time unit.
  • the processing unit may be a processor
  • the communication unit may be a transceiver
  • the storage unit may be a memory
  • the terminal includes:
  • the transceiver is used to receive the transmission configuration indication TCI information
  • a processor configured to determine the TCI state associated with the first physical shared channel and the TCI state associated with the second physical shared channel on the first time unit according to the TCI information
  • the first time unit is the time unit of the K time units corresponding to K repeated transmissions;
  • the K is an integer greater than or equal to 2;
  • the first physical shared channel and the second physical shared channel are at any time Parallel transmission on the unit;
  • At least two of the K time units have different TCI states associated with the same physical shared channel.
  • the terminal includes:
  • the transceiver is used to receive the transmission configuration indication TCI information
  • the processor is configured to determine, according to the TCI information, the TCI state associated with the first physical shared channel on the first time unit and the TCI state associated with the second time unit.
  • the first time unit is a time unit among K time units corresponding to K repeated transmissions.
  • the TCI state associated with the first physical shared channel on the first time unit is different from the TCI state associated with the second time unit.
  • this application also provides a network device.
  • the network device has part or all of the functions of the first network device in the method example described in the second aspect and part or all of the functions of the first network device or the second network device in the method embodiment described in the third aspect.
  • the function of the network device may have the function of some or all of the embodiments of the network device in this application, or it may have the function of independently implementing any of the embodiments in this application.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above-mentioned functions.
  • the structure of the network device may include a processing unit and a communication unit, and the communication unit is configured to support the network device to perform corresponding functions in the foregoing method.
  • the communication unit is used to support communication between the network device and other devices.
  • the network device may further include a storage unit, which is configured to be coupled with the acquisition unit and the sending unit, and stores the program instructions and data necessary for the network device.
  • the network device includes:
  • a processing unit configured to determine transmission configuration indicating TCI information; the TCI information is used to indicate the TCI state associated with the first physical shared channel and the second physical shared channel transmitted on the time unit;
  • the communication unit is configured to transmit the first physical shared channel and the second physical shared channel on at least two time units; and send transmission configuration indication TCI information;
  • the first physical shared channel and the second physical shared channel are multiplexed and are associated with different TCI states; on at least two different time units, The first physical shared channel and the second physical shared channel are associated with the same TCI state.
  • processing unit is further configured to determine to transmit the first physical shared channel and the second physical shared channel on at least two time units.
  • the communication unit may be a transceiver.
  • the network device includes:
  • a processor configured to determine transmission configuration indicating TCI information; the TCI information is used to indicate the TCI state associated with the first physical shared channel and the second physical shared channel transmitted on the time unit;
  • a transceiver configured to transmit the first physical shared channel and the second physical shared channel on at least two time units; and send transmission configuration indication TCI information; wherein, on the same time unit, the first physical shared channel Multiplexed with the second physical shared channel and respectively associated with different TCI states; on at least two different time units, the first physical shared channel and the second physical shared channel are associated with the same TCI state, wherein the processor is further configured to determine to transmit the first physical shared channel and the second physical shared channel on at least two time units.
  • the processor can be used to perform, for example, but not limited to, baseband related processing
  • the transceiver can be used to perform, for example, but not limited to, radio frequency transceiving.
  • the above-mentioned devices may be respectively arranged on independent chips, or at least partly or fully arranged on the same chip.
  • the processor can be further divided into an analog baseband processor and a digital baseband processor.
  • the analog baseband processor can be integrated with the transceiver on the same chip, and the digital baseband processor can be set on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip.
  • a digital baseband processor can be combined with a variety of application processors (such as but not limited to graphics processors, multimedia processors, etc.) Integrated on the same chip.
  • application processors such as but not limited to graphics processors, multimedia processors, etc.
  • Such a chip can be called a system on chip (System on Chip). Whether each device is independently arranged on different chips or integrated on one or more chips often depends on the specific needs of product design.
  • the embodiment of the present invention does not limit the specific implementation form of the foregoing device.
  • the present application also provides a processor, configured to execute the foregoing various methods.
  • the processes of sending and receiving the information in the foregoing methods can be understood as the process of outputting the foregoing information by the processor and the process of receiving the input of the foregoing information by the processor.
  • the processor when outputting the above-mentioned information, the processor outputs the above-mentioned information to the transceiver for transmission by the transceiver. Furthermore, after the above-mentioned information is output by the processor, other processing may be required before it reaches the transceiver.
  • the transceiver receives the aforementioned information and inputs it into the processor. Furthermore, after the transceiver receives the above-mentioned information, the above-mentioned information may need to undergo other processing before being input to the processor.
  • the receiving TCI information mentioned in the foregoing method can be understood as the processor inputting TCI information.
  • sending TCI information can be understood as the processor outputting TCI information.
  • the processor outputs and receives, inputs and other operations, instead of transmitting, sending and receiving directly by the radio frequency circuit and antenna.
  • the foregoing processor may be a processor dedicated to executing these methods, or a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor.
  • the above-mentioned memory may be a non-transitory (non-transitory) memory, such as a read only memory (Read Only Memory, ROM), which can be integrated with the processor on the same chip, or can be set on different chips.
  • ROM read only memory
  • the embodiment does not limit the type of the memory and the setting mode of the memory and the processor.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the aforementioned terminal, which includes a program for executing the first aspect or the fourth aspect of the aforementioned method.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the above-mentioned network device, which includes a program for executing the second aspect of the above-mentioned method.
  • this application also provides a computer program product including instructions, which when run on a computer, cause the computer to execute the method described in the first or fourth aspect.
  • this application also provides a computer program product including instructions, which when run on a computer, cause the computer to execute the method described in the second aspect.
  • the present application provides a chip system, which includes a processor and an interface, and is used to support the terminal to implement the functions involved in the first aspect or the fourth aspect, for example, to determine or process the functions involved in the above method At least one of the data and information.
  • the chip system further includes a memory, and the memory is used to store necessary program instructions and data of the network device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a chip system, which includes a processor and an interface, and is used to support network devices to implement the functions involved in the second aspect, for example, to determine or process the data and data involved in the above methods. At least one of the information.
  • the chip system further includes a memory, and the memory is used to store necessary program instructions and data of the network device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • FIG. 1 is an example diagram of a V2X system related to an embodiment of the present application
  • FIG. 2 is an example diagram of a wireless communication system related to an embodiment of the present application
  • FIG. 3 is an example diagram of an SDM-based physical layer processing flow involved in an embodiment of the present application
  • FIG. 4 is an example diagram of an FDM-based physical layer processing flow involved in an embodiment of the present application.
  • FIG. 5 is an example diagram of a multi-station repeated transmission scenario involved in an embodiment of the present application.
  • FIG. 6 is another example diagram of a multi-station repeated transmission scenario involved in an embodiment of the present application.
  • FIG. 7 is an example diagram of a two-station repeated transmission scenario provided by an embodiment of the present application.
  • FIG. 8 is an example diagram of the TCI state associated with the physical shared channel corresponding to FIG. 7 provided by an embodiment of the present application;
  • FIG. 9 is a diagram showing an example of changes of two physical shared channels provided by an embodiment of the present application according to a circulation rule
  • FIG. 10 is an example diagram of a four-station repeated transmission scenario provided by an embodiment of the present application.
  • FIG. 11 is an example diagram of the TCI state associated with the physical shared channel corresponding to FIG. 10 provided by an embodiment of the present application;
  • FIG. 12 is an example diagram of TRP transmission PDSCH corresponding to FIG. 10 provided by an embodiment of the present application.
  • FIG. 13 is another example diagram of the TCI state associated with the PDSCH corresponding to FIG. 10 provided by an embodiment of the present application;
  • FIG. 14 is a diagram showing an example of changes of four physical shared channels provided by an embodiment of the present application according to a circulation rule
  • FIG. 15 is another example diagram of a two-station repeated transmission scenario provided by an embodiment of the present application.
  • FIG. 16 is an example diagram of the TCI state associated with the physical shared channel corresponding to FIG. 15 provided by an embodiment of the present application;
  • FIG. 17 is a schematic flowchart of a channel transmission method provided by an embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a device provided by an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of another device provided by an embodiment of the present application.
  • the technical solution of the present application can be specifically applied to various communication systems.
  • the technical solution of this application can also be used in future networks, such as 5G systems, or new radio (NR) systems; or device to device (device to device). , D2D) system, machine to machine (M2M) system and so on.
  • 5G systems or new radio (NR) systems
  • NR new radio
  • device to device device to device
  • M2M machine to machine
  • V2X communication is aimed at high-speed devices represented by vehicles. It is the basic technology and key technology applied in scenarios with very high communication delay requirements in the future, such as smart cars, autonomous driving, and intelligent transportation systems.
  • the V2X communication includes: vehicle-to-vehicle (V2V) communication, vehicle to roadside infrastructure (vehicle to infrastructure, V2I) communication, vehicle to pedestrian communication (vehicle to vehicle, V2V) pedestrian, V2P) or vehicle-to-network (V2N) communication, etc.
  • V2V vehicle-to-vehicle
  • V2I vehicle to roadside infrastructure
  • V2P vehicle to pedestrian communication
  • V2N vehicle-to-network
  • the communication between the terminal devices involved in the V2X system is widely referred to as slide link (SL) communication.
  • the terminal described in this application may also be a vehicle or a vehicle component applied to a vehicle.
  • Fig. 1 is a schematic diagram of a V2X system involved in an embodiment of the present application.
  • the diagram includes V2V communication, V2P communication, and V2I/N communication.
  • vehicles or vehicle components communicate through V2V.
  • Vehicles or vehicle components can broadcast their own speed, driving direction, specific location, whether emergency brakes are stepped on, and other information to surrounding vehicles.
  • Drivers of surrounding vehicles can better perceive traffic conditions outside the line of sight by obtaining such information , So as to make advance judgments of dangerous situations and make avoidance;
  • vehicles or vehicle components communicate with roadside infrastructure through V2I, and roadside infrastructure can provide various types of service information and data network access for vehicles or vehicle components .
  • non-stop charging, in-car entertainment and other functions have greatly improved traffic intelligence.
  • Roadside infrastructure for example, roadside unit (RSU) includes two types: one is a terminal device type RSU.
  • the RSU of this terminal equipment type Since the RSU is distributed on the roadside, the RSU of this terminal equipment type is in a non-mobile state, and there is no need to consider mobility; the other is the network equipment type RSU.
  • the RSU of this network device type can provide timing synchronization and resource scheduling for vehicles or vehicle components communicating with network devices. Vehicles or vehicle components communicate with people through V2P; vehicles or vehicle components communicate with the network through V2N.
  • V2P vehicles or vehicle components communicate with the network through V2N.
  • the network architecture and business scenarios described in the embodiments disclosed in this application are intended to more clearly illustrate the technical solutions of the embodiments disclosed in this application, and do not constitute a limitation on the technical solutions provided in the embodiments disclosed in this application. Ordinary technicians can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments disclosed in this application are equally applicable to similar technical problems.
  • the network equipment involved in the embodiments disclosed in this application includes a base station (BS), which may be a device that is deployed in a wireless access network and can communicate with a terminal wirelessly.
  • the base station may have many forms, such as macro base stations, micro base stations, relay stations, and access points.
  • the base station involved in the embodiment disclosed in this application may be a base station in 5G or a base station in LTE, where the base station in 5G may also be referred to as a transmission reception point (TRP).
  • TRP transmission reception point
  • the network equipment may include a centralized unit (CU) and a distributed unit (DU, distributed unit).
  • the network device may also include a radio unit (RU).
  • CU implements part of the functions of the base station
  • DU implements some of the functions of network equipment, for example, CU implements radio resource control (RRC), packet data convergence protocol (PDCP) layer functions
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • DU implements wireless Functions of the link control (radio link control, RLC), media access control (media access control, MAC) and physical (physical, PHY) layers.
  • the network device may be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into network equipment in the access network RAN, or the CU can be divided into network equipment in the core network (Core network, CN), which is not limited here.
  • the device used to implement the function of the network device may be a network device; it may also be a device capable of supporting the network device to implement the function, such as a chip system, and the device may be installed in the network device.
  • the device used to implement the functions of the network equipment is a network device, and taking the network equipment as a base station as an example, the technical solutions provided in the embodiments disclosed in this application are described.
  • the terminal may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment , User agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in unmanned driving (self-driving), wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( The wireless terminal in transportation safety, the wireless terminal in the smart city, the wireless terminal in the smart home, the wireless terminal in the aforementioned V2X car networking, or the wireless terminal type RSU, etc.
  • At least one can also be described as one or more, and the multiple can be two, three, four or more, which is not limited in this application.
  • the embodiments disclosed in the present application for a technical feature, it is distinguished by "first”, “second”, “third”, “A”, “B”, “C”, and “D”.
  • the technical features in the technical features, the “first”, “second”, “third”, “A”, “B”, “C” and “D” describe the technical features in no order or size order.
  • FIG. 2 is a schematic diagram of a wireless communication system provided by an embodiment disclosed in the present application.
  • the wireless communication system may include: multiple network devices (such as TRP), and one or more terminals .
  • the network device can be used to communicate with the terminal through a wireless interface under the control of a network device controller (not shown).
  • the network device controller may be a part of the core network, or may be integrated into the network device.
  • the network device may be used to transmit control information or user data to the core network through a backhaul interface.
  • TRP1 and TRP2 can also communicate with each other directly or indirectly through a backhaul interface.
  • multiple network devices can schedule the same terminal, that is, a multi-station coordinated transmission scenario.
  • the same transmission block can be repeatedly transmitted in multiple time units.
  • the frequency domain resources occupied by repeated transmission of the transmission block in each time unit are the same.
  • the terminal may jointly decode the transmission blocks repeatedly transmitted on the multiple time units to feed back hybrid automatic repeat request-acknowledgment (HARQ-ACK).
  • HARQ-ACK hybrid automatic repeat request-acknowledgment
  • the transmission block in the scenario of repeated transmission of multiple stations, is not only repeatedly transmitted in the time domain, but also in each time unit, spatial domain multiplexing (SDM) or frequency domain multiplexing ( frequency domain multiplexing, FDM) for transmission. Therefore, the multi-site repeated transmission scenarios mainly include two kinds, one is SDM combined with time domain multiplexing (TDM), referred to as SDM+TDM scenario; the other is FDM combined with TDM, referred to as FDM+TDM scenario.
  • SDM+TDM scenario time domain multiplexing
  • FDM+TDM scenario FDM+TDM scenario
  • FIGS 3 and 4 take the physical layer processing flow as an example to illustrate FDM and SDM respectively. In order to facilitate the understanding of the contents of Figures 3 and 4, the following briefly introduces the physical layer processing flow.
  • the data sent from the media access control (MAC) layer to the physical layer is organized in the form of transport blocks (TB).
  • One TB is sent from the MAC layer to the physical layer.
  • the network device performs channel coding processing on each TB, and performs rate matching on the transmission block after the channel coding processing and stores it in the ring buffer.
  • the codeword (CW) obtained from the ring buffer based on the redundancy version can be regarded as a TB with error protection.
  • the codeword is mapped to one or more data transmission layers (Layer for short), and each data transmission layer corresponds to a valid data stream.
  • the data flow of each layer is mapped to the antenna port (antenna port) through the antenna port mapping.
  • the process of antenna port mapping can also be referred to as precoding, that is, the process of mapping data streams of each layer to antenna ports through a precoding matrix.
  • precoding that is, the process of mapping data streams of each layer to antenna ports through a precoding matrix.
  • the pre-coded data stream is mapped to physical time-frequency resources, converted into signals and sent out by network equipment.
  • TRP1 and TRP2 respectively perform channel coding and rate matching for the same transport block.
  • layer mapping is performed on the codewords, and they are mapped to Layer0 and Layer1 respectively.
  • the data stream of Layer 0 of the data transmission layer is mapped to antenna port 0 through antenna port mapping; the data stream of Layer 1 of the data transmission layer is mapped to antenna port 2 through antenna port mapping.
  • the data stream of antenna port 0 obtains PDSCH1 through resource mapping; the data stream of antenna port 2 obtains PDSCH2 through resource mapping.
  • TRP1 can transmit PDSCH1
  • TRP2 can transmit PDSCH2.
  • One of TRP1 and TRP2 also needs to notify the terminal that the TCI state associated with PDSCH1 is: TCI state 1 of the channel between TRP1 and the terminal, and the TCI state associated with PDSCH2 is: TCI state 2 of the channel between TRP2 and the terminal.
  • the data stream of the data transmission layer Layer 0 can be mapped to CDM group 0 through the antenna port mapping; and the data stream of the data transmission layer Layer 1 can be mapped through the antenna port mapping. Go to CDM group 1.
  • TRP1 and TRP2 perform channel coding and rate matching for the same transport block.
  • the data stream of Layer 0 of the data transmission layer is mapped to the antenna port 0 through the antenna port mapping.
  • the data stream of antenna port 0 is mapped to different frequency domain resources through resource mapping. For example, map to frequency domain resource 1 and frequency domain resource 2 to obtain PDSCH1 and PDSCH2, respectively.
  • the physical shared channel transmitted based on frequency domain resource 1 is recorded as PDSCH1, and the physical shared channel transmitted based on frequency domain resource 2 is recorded as PDSCH2. Furthermore, TRP1 transmits PDSCH1, and TRP2 transmits PDSCH2.
  • TRP1 and TRP2 also needs to notify the terminal that the TCI state associated with PDSCH1 is: the TCI state of the channel between TRP1 and the terminal, and the TCI state associated with PDSCH is: the TCI state of the channel between TRP2 and the terminal.
  • FIG. 5 is an example diagram of a multi-station repeated transmission scenario involved in an embodiment of the present application. Assume that the transmission block is repeatedly transmitted on time slots n to n+3. In addition, the repeatedly transmitted transport block obtains PDSCH1 and PDSCH2 through the SDM and FDM shown in FIG. 3 and FIG. 4 above. As shown in Figure 5, both PDSCH1 and PDSCH2 are repeatedly transmitted on time slots n to n+3.
  • Fig. 6 is another example diagram of a multi-station repeated transmission scenario involved in an embodiment of the present application. It is assumed that the transmission block is repeatedly transmitted on mini-slots n to n+3, and the repeatedly transmitted transmission block obtains PDSCH1 and PDSCH2 through the SDM and FDM shown in Figs. 3 and 4 above. As shown in Figure 6, both PDSCH1 and PDSCH2 are repeatedly transmitted on mini-slots n to n+3.
  • the time unit may be one or more radio frames, one or more subframes, one or more time slots, and one or more micro-hours.
  • Mini slot one or more orthogonal frequency division multiplexing (OFDM) symbols, discrete fourier transform spread spectrum orthogonal frequency division multiplexing (discrete fourier transform spread spectrum orthogonal frequency division multiplexing) , DFT-S-OFDM) symbols, etc.
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete fourier transform spread spectrum orthogonal frequency division multiplexing
  • SI system information
  • the number of repeated transmissions of the transmission block in the time domain K can be configured by RRC; the time domain resources occupied by the transmission block repeated transmission in the time domain can be indicated by the DCI.
  • one transmission refers to one transmission in the time domain or repeated transmission in a time unit.
  • one-time transmission or repeated transmission in a time unit includes parallel transmission of multiple TRPs based on SDM or FDM.
  • one transmission includes one parallel transmission of PDSCH1 and PDSCH2 in one slot or mini-slot.
  • a complete transmission process includes K repeated transmissions in the time domain. That is, a complete transmission process includes parallel transmission of multiple physical shared channels on K time units by multiple network devices. As shown in Figure 5 and Figure 6, a complete transmission process includes four parallel transmissions of TRP1 and TRP1 in time slots n to n+3, and PDSCH1 and PDSCH2.
  • the TCI state is a field in DCI used to indicate the quasi co-location (QCL) of the PDSCH antenna port. It is used to configure the quasi co-location relationship between one or two downlink reference signals and the DMRS of the PDSCH, which can be understood as this Channel characteristics of the secondary PDSCH transmission process. Therefore, the terminal device can learn the indication information of the received PDSCH channel large-scale parameter relationship based on the TCI state, and then demodulate the data transmitted on the PDSCH based on the channel estimation. In the scenario of multi-station coordinated transmission, for terminal devices, different TRPs have different TCI states during PDSCH transmission.
  • the QCL relationship is used to indicate that multiple resources have one or more identical or similar communication characteristics. For example, if two antenna ports have a quasi co-location relationship, the large-scale characteristics of the channel for one port to transmit a signal can be inferred from the large-scale characteristics of the channel for the other port to transmit a signal.
  • the signals corresponding to the antenna ports with the QCL relationship have the same parameters, or the parameters of one antenna port can be used to determine the parameters of the other antenna port that has the QCL relationship with the antenna port, or the two antenna ports have the same parameters , Or, the parameter difference between the two antenna ports is less than a certain threshold.
  • the parameters may include one or more of the following large-scale channel parameters: delay spread, Doppler spread, Doppler shift, average delay (average delay) delay), average gain, spatial reception parameters (spatial Rx parameters).
  • the spatial receiving parameters can include the angle of arrival (AOA), the dominant angle of emission (Dominant AoA), the average angle of arrival (Average AoA), the angle of arrival (Angle of departure, AOD), the channel correlation matrix, and the angle of arrival Power angle spread spectrum, average firing angle (Average AoD), power angle spread spectrum of departure angle, transmit channel correlation, receive channel correlation, transmit beamforming, receive beamforming, spatial channel correlation, spatial filter, or, One or more of spatial filtering parameters, or spatial reception parameters, etc.
  • TRPs are located in different geographic locations, and the TCI state of the channel between each TRP and the terminal is also different. Since in the embodiment disclosed in this application, one transmission includes parallel transmission of multiple physical shared channels, the network device needs to configure the TCI state of the multiple physical shared channels for the terminal.
  • each time unit adopts multiple physical shared channels obtained by FDM or SDM.
  • the embodiment disclosed in this application transmits the same physical shared channel on at least two time units
  • the network equipment is different, and the TCI state associated with the same physical shared channel is also different.
  • multiple network devices transmit each physical shared channel according to a preset change rule, and each physical shared channel associates each TCI state according to a preset change rule.
  • multiple network devices transmit each physical shared channel in a round-robin manner, and each physical shared channel is associated with multiple TCI states using a cyclic shift.
  • This application provides a channel transmission method.
  • the same physical shared channel can be transmitted by at least two network devices, or be transmitted by different network devices in at least two time units. That is, one network device in cooperative transmission can transmit different physical shared channels on at least two time units.
  • each physical shared channel is transmitted by at least two network devices in a complete transmission process. Therefore, it is possible to reduce the degree of influence of network devices with poor transmission power on the receiving performance of the physical shared channel, and to reduce the probability of incomplete information bits received by the terminal.
  • FIG. 7 is another example diagram of a multi-station repeated transmission scenario provided by an embodiment of the present application.
  • TRP1 does not only transmit PDSCH1 in time slots n to n+3.
  • TRP1 can transmit PDSCH1 and PDSCH2 in turn in time slots n to n+3; correspondingly, TRP2 is also in time On slots n to n+3, PDSCH2 and PDSCH1 are sent in turn in parallel with TRP1.
  • each PDSCH transmitted by TRP1 will have poor reception performance.
  • two of the four PDSCH1 received by the terminal are sent by TRP2, and two of the four PDSCH2 received by the terminal are sent by TRP2. Therefore, the reception performance of PDSCH1 and PDSCH2 will not result in poor overall reception performance due to the poor transmission power of TRP1, thereby enabling the terminal to obtain relatively complete information bits based on PDSCH1 and PDSCH2 with good reception performance.
  • TRP1 repeatedly transmits PDSCH1 in time slots n to n+3, or mini-slots n to n+3, and TRP2 transmits PDSCH1 in time slots n to n+3, or mini-slots n to n PDSCH2 is repeatedly transmitted on +3.
  • TRP1 the transmission power of TRP1 is poor, the reception performance of PDSCH1 will be poor, that is, the information bits contained in PDSCH1 may always be lost. Therefore, when the terminal combines the PDSCH1 and PDSCH2 that are repeatedly transmitted multiple times, the information bits obtained by the combination are incomplete due to the lack of valid data carried by the PDSCH1.
  • the embodiment of the present application can perform repeated transmission in a scenario where multiple TRPs cooperate, and once one of the TRPs has a transmission power difference, the robustness of the transmission can be guaranteed.
  • this application also provides a TCI status determination method.
  • the network device can send TCI information to the terminal; the terminal can determine the TCI status associated with each physical shared channel on each transmission or each time unit based on the TCI information.
  • the same physical shared channel is transmitted by different TRPs in at least two time units. Therefore, the same physical shared channel has different TCI states associated with at least two time units. In this way, when the network device that transmits the physical shared channel changes, the TCI state associated with the physical shared channel also changes accordingly, and the change rhythm of the two is the same. That is, in the embodiment disclosed in this application, the preset change rule of the network device transmitting the physical shared channel is the same as the preset change rule of the TCI state associated with the physical shared channel.
  • the preset change rule may be a cyclic rule on K time units.
  • the physical shared channel sent by a network device is: a network device sends different physical shared channels in K time units in turn; or the same physical shared channel is on multiple time units It is sent by different network devices in turn; or multiple network devices transmit each physical shared channel in turn.
  • the TCI state associated with the physical shared channel obtained by the terminal is: the same physical shared channel is associated with different TCI states in K time units in turn; or the multiple physical shared channels are associated with multiple Each TCI state is associated with cyclic shift or in turn.
  • the N PDSCHs are transmitted by N network devices in K time units according to the above-mentioned cyclic rule.
  • the N PDSCHs also follow the above-mentioned cyclic rule. Associated with N TCI states.
  • TCI state corresponding to the channel conditions of TRP ⁇ #1,#2,...,#N ⁇ is TCI state ⁇ #1,#2,...,#N ⁇
  • the N PDSCHs are PDSCH ⁇ #1 ,#2,...,#N ⁇ .
  • the N PDSCHs are transmitted by TRP ⁇ #1,#2,...,#N ⁇ in turn, and the N PDSCHs are sequentially associated with the TCI state ⁇ #1,#2,...,#N ⁇ ;
  • the N PDSCHs are transmitted by TRP ⁇ #2,#3,...,#N,#1 ⁇ in turn, and the N PDSCHs are in turn with the TCI state ⁇ #2,#3,..., #N,#1 ⁇ Association;
  • the N PDSCHs are transmitted by TRP ⁇ #3,#4,...,#N,#1,#2 ⁇ in turn, and the N PDSCHs are transmitted with TCI in turn State ⁇ #3,#4,...,#N,#1,#2 ⁇ is associated;...; at the K-1th time unit, the N PDSCHs are sequentially represented by TRP ⁇ #K-1,...,#N , #1, #2,...,#K-2 ⁇ transmission, the N PDSCHs are sequentially associated with TCI states ⁇ #
  • FIG. 8 is an example diagram of a TCI state associated with the physical shared channel corresponding to FIG. 7 provided by an embodiment of the application.
  • TRP1 sends PDSCH1 in time slot n
  • TRP2 sends PDSCH2 in time slot n
  • PDSCH1 is associated with TCI state state#1
  • PDSCH2 is associated with TCI state#2;
  • TRP1 sends PDSCH2 on time slot n+1
  • TRP2 sends PDSCH1 on time slot n+1
  • PDSCH2 is associated with TCI state#1
  • PDSCH1 is associated TCI state#2;
  • TRP1 sends PDSCH1 on time slot n+2, and TRP2 sends PDSCH2 on time slot n+2.
  • PDSCH1 is associated with TCI state#1 and PDSCH2 is associated TCI state#2;
  • TRP1 sends PDSCH2 on time slot n+3, and TRP2 sends PDSCH1 on time slot n+3.
  • TRP2 sends PDSCH1 on time slot n+3.
  • PDSCH2 is associated with TCI state#1 and PDSCH1 is associated TCI state#2.
  • TRP1 and TRP2 transmit PDSCH1 and PDSCH2 in turn according to the cyclic rule from time slot n to time slot n+3; correspondingly, as shown in Figure 8, PDSCH1 is based on time slot n to time slot n+3 Circular rule, associating TCI state#1 and TCI state#2 in turn.
  • the same PDSCH is transmitted by different TRPs from time slot n to time slot n+3 according to the cyclic rule and associated with different TCI states.
  • the time slot can also be replaced with a mini time slot. That is, when the four time units corresponding to 4 repeated transmissions are mini-slots n to n+3, respectively, the PDSCH pattern of TRP1 and TRP2 shown in Fig. 7 is also shown, and the physical shared channels and TCI states shown in Fig. 8 The association relationship, and the circular rule shown in Figure 9.
  • the TCI state corresponding to TRP1 is TCI#1; the TCI state corresponding to TRP2 is TCI#2; the TCI state corresponding to TRP3 is TCI#3; the TCI state corresponding to TRP4 is It is TCI#4; the four physical shared channels obtained through SDM or FDM are PDSCH1, PDSCH2, PDSCH3, and PDSCH4; the four time units corresponding to the 4 repeated transmissions are time slots n to n+3;
  • TRP1 sends PDSCH1 in time slot n
  • TRP2 sends PDSCH2 in time slot n
  • TRP3 sends PDSCH3 in time slot n
  • TRP4 sends PDSCH4 in time slot n
  • PDSCH1 is associated TCI state#1
  • PDSCH2 is associated with TCI state#2
  • PDSCH3 is associated with TCI state#3
  • PDSCH4 is associated with TCI state#4;
  • TRP1 sends PDSCH2 in time slot n+1
  • TRP2 sends PDSCH3 in time slot n+1
  • TRP3 sends PDSCH4 in time slot n+1
  • TRP4 sends PDSCH1 in time slot n+1, as shown in Figure 11.
  • PDSCH1 is associated with TCI state#4
  • PDSCH2 is associated with TCI state#1
  • PDSCH3 is associated with TCI state#2
  • PDSCH4 is associated with TCI state#3;
  • TRP1 sends PDSCH3 in time slot n+2
  • TRP2 sends PDSCH4 in time slot n+2
  • TRP3 sends PDSCH1 in time slot n+2
  • TRP4 sends PDSCH2 in time slot n+2, as shown in Figure 11.
  • PDSCH1 is associated with TCI state#3
  • PDSCH2 is associated with TCI state#4
  • PDSCH3 is associated with TCI state#1
  • PDSCH4 is associated with TCI state#2;
  • TRP1 sends PDSCH4 in time slot n+3
  • TRP2 sends PDSCH1 in time slot n+3
  • TRP3 sends PDSCH2 in time slot n+3
  • TRP4 sends PDSCH3 in time slot n+3, as shown in Figure 11.
  • PDSCH1 is associated with TCI state#2
  • PDSCH2 is associated with TCI state#3
  • PDSCH3 is associated with TCI state#4
  • PDSCH4 is associated with TCI state#1.
  • TRP1 to TRP4 transmit PDSCH1 to PDSCH4 in turn according to a cyclic rule on time slot n to time slot n+3.
  • the corresponding relationship between TRP1 to TRP4 and PDSCH1 to PDSCH4, the cyclic rule on time slot n to time slot n+3 is: in the left column of each table in Figure 12, each TRP keeps Without changing, the right PDSCH column is cyclically shifted, so as to obtain the correspondence between TRP1 to TRP4 and PDSCH1 to PDSCH4 in each time slot.
  • PDSCH1 is associated with TCI state#1 to TCI state#4 in turn according to the round robin rule from time slot n to time slot n+3.
  • the correspondence between PDSCH1 to PDSCH4 and TCI state#1 to TCI state#4 is: In the left column, each PDSCH remains unchanged, and the right TCI column is cyclically shifted to obtain the correspondence between PDSCH1 to PDSCH4 and TCI state#1 to TCI state#4 in each time slot.
  • the direction of cyclic shift in FIG. 12 is different from the direction of cyclic shift in FIG. 13.
  • the PDSCH associated with the TRP is cyclically shifted from large to small in the counterclockwise direction of the PDSCH index for the TRP, but for the PDSCH, it is based on the TCI (or TRP) index.
  • the counterclockwise cyclic shift can also be called the left shift cycle; the clockwise cyclic shift can also be called the right shift cycle.
  • the same PDSCH is transmitted by different TRPs and associated with different TCI states from time slot n to time slot n+3 according to the cyclic rule.
  • the cyclic shift direction of the TRP transmitted and its associated TCI state are the same.
  • the TCI state determination method can reduce the influence of network devices with poor transmission power on data transmission, thereby improving the robustness of transmission.
  • this round-robin rule can also be called a flip rule or an interchange rule in the case of two physical shared channels.
  • the preset change rule may be a cyclic rule on a partial time unit, that is, the same physical shared channel is based on the above cyclic rule on a partial time unit, and the transmission network device and the associated TCI state are replaced. ; In another part of the time unit, the network equipment and the associated TCI status of the same physical shared channel transmission are the same.
  • TRP1 transmits PDSCH1 on both time slot n and time slot n+2
  • TRP2 transmits PDSCH2 on both time slot n and time slot n+2
  • TRP3 transmits PDSCH2 on time slot n and time slot n+2.
  • PDSCH3 is transmitted on both slot n+2, and TRP4 transmits PDSCH4 on both time slot n and time slot n+2;
  • TRP1 transmits PDSCH2 on both time slot n+1 and time slot n+3, and
  • TRP2 transmits PDSCH2 on time slot n+1 PDSCH3 is transmitted on time slot n+3,
  • TRP3 transmits PDSCH4 on time slot n+1 and time slot n+3, and TRP4 transmits PDSCH1 on time slot n+1 and time slot n+3.
  • PDSCH1 is associated with TCI state#1 on both time slot n and time slot n+2
  • PDSCH2 is associated with TCI state# on both time slot n and time slot n+2 2.
  • PDSCH3 is associated with TCI state#3 in time slot n and time slot n+2, PDSCH4 is associated with TCI state#4 in time slot n and time slot n+2; PDSCH1 is in time slot n+1 and time slot TCI state#4 is associated with both n+3, TCI state#1 is associated with PDSCH2 in both time slot n+1 and time slot n+3, and TCI state is associated with PDSCH3 in both time slot n+1 and time slot n+3 #2, PDSCH4 is associated with TCI state#3 on both time slot n+1 and time slot n+3.
  • the network device that transmits the physical shared channel and the associated TCI state are based on the cyclic rule, which is flipped once, shifted once or exchanged once.
  • the division of each partial time unit can be determined by protocol pre-definition or RRC configuration, and the embodiments disclosed in this application are not limited to the foregoing FIGS. 13 and 14 Give examples to illustrate the time unit division method.
  • the terminal determines the TCI state associated with each physical shared channel on each time unit, which may be specifically determined based on the TCI information carried in the DCI. The following is described in two embodiments.
  • the TCI information is used to indicate the TCI status of each physical shared channel on the second time unit, that is, the TCI status of each physical shared channel in one transmission.
  • the TCI state of each physical shared channel in other time units or the TCI state of each physical shared channel in other transmissions may be determined based on the foregoing preset change rule.
  • the TCI information can be carried by the TCI field in the DCI.
  • the second time unit is the first time unit with the frontmost position in the time domain among the K time units, the Kth time unit with the backmost position in the time domain, or other preset time units.
  • the TCI status of each physical shared channel on the first time unit is obtained by performing the above preset change rule on the TCI status of each physical shared channel on the second time unit.
  • the terminal cyclically shifts, flips, or exchanges the TCI information corresponding to the second time unit, and the obtained TCI state sequence is used as the TCI state of each physical shared channel on the first time unit.
  • the first time unit is a time unit different from the second time unit among the K time units.
  • the preset change rule may be a cyclic rule on part of the time unit
  • the first time unit may also be a time unit adjacent to the second time unit; or the first time unit is among K time units The odd-numbered time unit of, and the second time unit is the even-numbered time unit among the K time units.
  • the TCI information is used to indicate the TCI status of each physical shared channel on K time units, that is, the TCI status of each physical shared channel during a complete transmission.
  • the terminal can directly read the TCI status of each physical shared channel in each time unit or in each transmission from the TCI information, thereby receiving each physical shared channel based on the TCI status of each physical shared channel.
  • the terminal may interpret the TCI information as follows: time domain first, frequency/space domain, or frequency domain/spatial domain first, and time domain first. No matter which interpretation method is adopted, it is equivalent to that the terminal can obtain the TCI state associated with each PDSCH according to this predefined pattern or rule.
  • the time domain followed by the frequency domain/spatial domain means that the TCI information on each time unit is read from the TCI information; then the TCI information on each time unit is obtained to obtain the TCI status associated with each frequency domain or each spatial domain The associated TCI status.
  • the frequency domain/spatial domain first and then the time domain means to first read the TCI state associated with each frequency domain or the TCI state associated with each spatial domain from the TCI information; then determine the TCI information on each time unit.
  • the same physical shared channel is transmitted in at least two time units with different network devices and different associated TCI states.
  • the network equipment that transmits each physical shared channel on each time unit and the TCI state associated with each physical shared channel may also have the characteristics of the aforementioned preset change rule.
  • the DCI includes a TCI field, and the TCI information carried in the TCI field can indicate the TCI status of each physical shared channel on K time units; in another case, the DCI can include K In the TCI field, the TCI information carried in each TCI field indicates the TCI status of each physical shared channel in a time unit.
  • the correspondence between K TCI domains and K time units may be determined based on the index number or identification of the TCI domain and the index number or identification of the time unit.
  • the number of bits of the TCI information is determined based on the number of TRPs for cooperative transmission. Assuming that the number of TRPs for cooperative transmission is N, then there are N physical shared channels transmitted in parallel in each time unit or each transmission, and each physical shared channel is associated with a TCI state. Therefore, the network device needs to configure N to the terminal TCI status.
  • Figure 17 is a schematic flow chart of a channel transmission method provided by an embodiment of the present application, wherein TRP1 is equivalent to the first network device in the claims, and TRP2 is equivalent to the second network device in the claims. ,
  • the terminal is equivalent to the terminal in the claims.
  • the channel transmission method may include the following steps:
  • TRP1 sends transmission configuration indication TCI information; the terminal receives the TCI information;
  • TRP1 sends the first physical shared channel
  • TRP2 sends the second physical shared channel
  • TRP1 sends the second physical shared channel
  • TRP2 sends the first physical shared channel
  • the terminal determines the TCI status associated with the first physical shared channel on the first time unit and the TCI status associated with the second physical shared channel according to the TCI information; and according to the TCI associated with the first physical shared channel on the first time unit Status and TCI status associated with the second physical shared channel, receiving the first physical shared channel sent by TRP1 on the first time unit, and the second physical shared channel sent by TRP2 on the first time unit;
  • the terminal determines the TCI status associated with the first physical shared channel and the TCI status associated with the second physical shared channel on the second time unit according to the TCI information; and according to the TCI status associated with the first physical shared channel on the second time unit Status and the TCI status associated with the second physical shared channel, receiving the second physical shared channel sent by TRP1 on the second time unit and the first physical shared channel sent by TRP2 on the second time unit.
  • the first time unit and the second time unit are two time units of the K time units corresponding to K repeated transmissions; the K is an integer greater than or equal to 2; the first physical shared channel and the second physical shared channel
  • the channels are transmitted in parallel on each time unit.
  • the same transport block is repeatedly transmitted between K time units, and the transport block obtains two physical shared channels in FDM or SDM on each time unit.
  • the two physical shared channels have different channel characteristics, so that the terminal can obtain a more complete transmission block when receiving combined.
  • the physical shared channels sent by TRP1 and TRP2 on the first time unit and the second time unit are exchanged according to the preset change rule.
  • the TCI state respectively associated with the first physical shared channel and the second physical shared channel on the first time unit, and the TCI state respectively associated with the first physical shared channel and the second physical shared channel on the second time unit, also change according to the preset Rules, exchange.
  • the TCI information may be carried in the DCI, and is indicated by the index value in the TCI field in the DCI. Two implementation manners of how to determine the TCI state associated with each physical shared channel in steps 104 and 105 are described below.
  • the TCI information is used to indicate the first TCI status associated with the first physical shared channel on one time unit among the K time units, and the second TCI associated with the second physical shared channel status.
  • the terminal can directly read the TCI information to obtain the first TCI state associated with the first physical shared channel on the second time unit.
  • the second TCI state associated with the shared channel can determine the TCI state associated with each physical shared channel on the first time unit according to the preset change rule.
  • the TCI information can be indicated by the index value in the TCI field in the DCI.
  • Table 1 is the TCI state table, and index is the index value in the TCI field. Based on the index value, the TCI state associated with each physical shared channel in a time unit can be determined. The TCI state sequence corresponding to each index value in Table 1 is the TCI state associated with each physical shared channel on a time unit.
  • TCI status sequence 0 TCI state#0 1 TCI state#1 ... ... 6 TCI state#0, TCI state#1, 7 TCI state#2,TCI state#3
  • the terminal can determine that the TCI states associated with each physical shared channel on the second time unit are TCI state#0 and TCI state#1.
  • each physical shared channel on the second time unit has a one-to-one correspondence with the TCI state indicated by the index in the TCI field.
  • the specific association relationship on the second time unit can be determined according to the index number or identification of the physical shared channel and the index number or identification of the TCI state.
  • the index number or identifier of the physical shared channel is the index number or identifier of the physical layer parameter associated with the physical shared channel.
  • the physical layer parameters include one or more of a data transmission layer (layer), an antenna port (antenna port), a code division multiplexing CDM group, and frequency domain resources.
  • the index number or identification of the physical shared channel is arranged in ascending order with the index number or identification of the TCI state in a one-to-one correspondence to determine the specific association relationship on the second time unit.
  • the index number or identifier of PDSCH1 can correspond to different identifiers depending on the multiplexing mode.
  • the ID or index number of PDSCH1 can be Layer 0, DMRS port 0, or the ID or index number of CDM group 0, and the ID or index number of PDSCH2 can be Layer 1, DMRS port 2, or CDM The ID or index number of group 1.
  • PDSCH1 can be identified by frequency domain resource 0; PDSCH2 can be identified by frequency domain resource 1. Then, according to the index in the TCI field as 6, the terminal can obtain the association relationship shown in Table 2 on the second time unit based on Table 1. Among them, (X, Y) means X and Y are related.
  • the TCI state associated with the first physical shared channel and the second physical shared channel is based on the exchange rule to transfer the first physical shared channel to the second time unit.
  • the TCI states respectively associated with the second physical shared channel are exchanged.
  • the exchange rules are pre-defined by protocols or configured by radio resource control RRC.
  • the terminal determining the TCI status associated with the first physical shared channel and the TCI status associated with the second physical shared channel on the first time unit according to the TCI information may include: , The first TCI state associated with the first physical shared channel is exchanged with the second TCI state associated with the second physical shared channel to obtain the first time unit, the first physical shared channel The second TCI state is associated and the second physical shared channel is associated with the first TCI state.
  • Table 3 the TCI states associated with PDSCH1 and PDSCH2 in Table 2 are exchanged to obtain the TCI states associated with PDSCH1 and PDSCH2 on the first time unit as shown in Table 3.
  • the TCI information is used to indicate the respective TCI states associated with the first physical shared channel and the second physical shared channel on each time unit of the K time units.
  • the terminal can directly obtain the TCI state associated with the first physical shared channel and the second physical shared channel in each time unit directly from the TCI information.
  • the TCI state associated with each physical shared channel on each time unit may also satisfy the above-mentioned preset change rule.
  • the TCI states respectively associated with the first physical shared channel and the second physical shared channel on the first time unit are exchanged with those also according to a preset change rule.
  • the terminal can interpret the preset change rule to obtain the TCI state associated with each PDSCH. For example, during a complete repeated transmission of two physical shared channels, the preset change rule of the associated TCI state is ⁇ 1,2,2,1... ⁇ , then the terminal can be based on the number of repetitions in the time domain and the time The index number of the time unit in the domain interprets the preset change rule to obtain the TCI state ⁇ 1,2 ⁇ or ⁇ 2,1 ⁇ associated with the two physical shared channels in each time unit; and then based on each time The ⁇ 1,2 ⁇ or ⁇ 2,1 ⁇ on the unit determines the TCI state#1 or TCI state#2 associated with each frequency domain parameter or each spatial parameter.
  • the TCI information in this embodiment can also be indicated by the index value in the TCI field in the DCI.
  • Table 4 is another TCI state table, where index is an index value in the TCI field, and the TCI state associated with each physical shared channel on K time units can be determined based on the index value.
  • the terminal can obtain the TCI state associated with the physical shared channel on each time unit from the table 4 according to the index number of the time unit and the index number of the physical shared channel.
  • the index number of the time unit and the ascending order of the index number or identification of the physical shared channel correspond to the index number or identification of the TCI state in a one-to-one correspondence to determine the specific Relationship.
  • the ascending order arrangement in the above example can also be replaced with a descending order arrangement, or the index number or identification of the physical shared channel is arranged in a descending order and the index number or identification of the TCI state is arranged in a one-to-one correspondence. Determine the specific association relationship on each time unit.
  • the index number of the first time unit is before the index number of the second time unit, the first physical shared channel is PDSCH1, and the second physical shared channel is PDSCH2, then the index number or identification of PDSCH1 depends on the multiplexing mode.
  • the ID or index number of PDSCH1 can be Layer 0, DMRS port 0, or the ID or index number of CDM group 0, and the ID or index number of PDSCH 2 can be Layer 1, DMRS port 2, or CDM group 1. ID or index number.
  • PDSCH1 can be identified by frequency domain resource 0; PDSCH2 can be identified by frequency domain resource 1.
  • the terminal can obtain the association relationship shown in Table 5 on the first time unit and the second time unit based on Table 4.
  • (X, Y) means X and Y are related.
  • the terminal has at least two types of interpretation rules for TCI information.
  • the manner in which the terminal reads the TCI state index number may first be read according to the index number of the time unit (time domain), and then read according to the index number of the physical shared channel (space domain/frequency domain). That is, the terminal first interprets the TCI information corresponding to the index number in the time domain or the index number of the time unit, and then interprets the TCI status associated with the index number of the space resource or frequency domain resource.
  • the manner in which the terminal reads the TCI state index number may first be read according to the index number of the physical shared channel (spatial domain/frequency domain), and then read according to the index number of the time unit (time domain). That is, the terminal first interprets the TCI information corresponding to the index number of the frequency domain resource or the time domain resource, and then interprets the TCI state associated with the index number of the time domain resource or time unit.
  • the terminal receives the transmission configuration indication TCI information, and according to the TCI information, determines the TCI status associated with the first physical shared channel on the first time unit and the TCI status associated on the second time unit.
  • the first time unit is a time unit among K time units corresponding to K repeated transmissions in the time domain.
  • the TCI state associated with the first physical shared channel on the first time unit is different from the TCI state associated with the second time unit.
  • the TCI information is used to indicate the first TCI state associated with the second physical shared channel on the first time unit, and the second TCI state associated with the second time unit.
  • the terminal determines the TCI state associated with the first physical shared channel on the first time unit and the TCI state associated on the second time unit according to the TCI information, including: the terminal places the second physical shared channel on the first time unit
  • the first TCI state associated with the above is exchanged with the second TCI state associated with the second time unit to obtain the first physical shared channel associated with the second TCI state on the first time unit and its associated second TCI state on the second time unit.
  • a TCI status is used to indicate the first TCI state associated with the second physical shared channel on the first time unit, and the second TCI state associated with the second time unit.
  • the TCI information indicates the TCI information corresponding to the second physical shared channel in a complete transmission process. Then, the TCI information corresponding to the first physical shared channel in a complete transmission process can be obtained by cyclic shifting the TCI information corresponding to the second physical shared channel.
  • the TCI information is used to indicate the TCI status of each physical shared channel associated with each time unit.
  • the terminal can directly interpret the TCI information corresponding to each physical shared channel from the TCI information using frequency domain or spatial resources; and then interpret the TCI status of each physical shared channel associated with each time unit according to the time domain resources.
  • the terminal obtains the TCI information on each time unit based on the repeated transmission mode in the time domain. Then, read the TCI state corresponding to each frequency domain resource on each time unit based on the index number of the frequency domain resource.
  • the terminal reads the TCI information corresponding to time unit 1 ⁇ TCI state#2, from ⁇ TCI state#2,TCI state#3,TCI state#3,TCI state#2 ⁇ TCI state#3 ⁇ , TCI information ⁇ TCI state#3,TCI state#2 ⁇ corresponding to time unit 2.
  • the terminal obtains the association between frequency domain resource 1 and TCI state#2, or the PDSCH1 and TCI corresponding to frequency domain resource 1 state#2 is associated; frequency domain resource 2 is associated with TCI state#3, or PDSCH2 corresponding to frequency domain resource 2 is associated with TCI state#3.
  • the terminal obtains the association between frequency domain resource 1 and TCI state#3, or PDSCH1 and TCI state# corresponding to frequency domain resource 1 3 Association: Frequency domain resource 2 is associated with TCI state#2, or PDSCH2 corresponding to frequency domain resource 2 is associated with TCI state#2.
  • the terminal reads the TCI information corresponding to time unit 1 from ⁇ TCI state#2,TCI state#3 ⁇ as ⁇ TCI state#2,TCI state#3 ⁇ ; based on the preset change rule, such as cyclic shift, time unit 2 is obtained The corresponding TCI information is ⁇ TCI state#3,TCI state#2 ⁇ .
  • the terminal reads the frequency domain resource 1 (or the PDSCH1 corresponding to the frequency domain resource 1) in the time unit 1 TCI state#2 is associated, and frequency domain resource 2 (or PDSCH2 corresponding to frequency domain resource 2) is associated with TCI state#3 on time unit 1.
  • the terminal reads the frequency domain resource 1 (or the PDSCH1 corresponding to the frequency domain resource 1) in the time unit 2 TCI state#3 is associated, and frequency domain resource 2 (or PDSCH2 corresponding to frequency domain resource 2) is associated with TCI state#2 in time unit 2.
  • the terminal obtains the TCI information on each time unit based on the repeated transmission mode in the time domain and the index number of each time unit (time domain). Then, the terminal reads the TCI state associated with the index number of each airspace resource on each time unit based on the SDM transmission module and the index number of the airspace resource.
  • the terminal repeats the transmission twice based on the time domain, and reads the corresponding time unit 1 from ⁇ TCI state#2,TCI state#3,TCI state#3,TCI state#2 ⁇
  • the TCI information of is ⁇ TCI state#2,TCI state#3 ⁇
  • the TCI information corresponding to time unit 2 is ⁇ TCI state#3,TCI state#2 ⁇ .
  • the terminal obtains the TCI state associated with the index number of the airspace resource can be: Layer0 and TCI state#2 is associated, or DMRS port0 is associated with TCI state#2, or CDM group 0 is associated with TCI state#2, or PDSCH1 corresponding to Layer0, DMRS port0, or CDM group 0 is associated with TCI state#2; and Layer1 and TCI state #3 is associated, or DMRS port2 is associated with TCI state#3, or CDM group 1 is associated with TCI state#3, or PDSCH2 corresponding to Layer 1, DMRS port2, or CDM group 1 is associated with TCI state#3.
  • the terminal reads the TCI state associated with the index number of each airspace resource on time unit 2 as: Layer 1 and TCI state#2 is associated, or DMRS port2 is associated with TCI state#2, or CDM group 1 is associated with TCI state#2, or the PDSCH2 corresponding to Layer1, DMRS port2, or CDM group 1 is associated with TCI state#2; and Layer0 is associated with TCI state#2 #3 is associated, or DMRS port0 is associated with TCI state#3, or CDM group 0 is associated with TCI state#3, or PDSCH1 corresponding to Layer0, DMRS port0, or CDM group 0 is associated with TCI state#3.
  • the terminal reads the TCI information corresponding to time unit 1 from ⁇ TCI state#2,TCI state#3 ⁇ as ⁇ TCI state#2,TCI state#3 ⁇ ; based on the preset change rule, such as cyclic shift, time unit 2 is obtained The corresponding TCI information is ⁇ TCI state#3,TCI state#2 ⁇ .
  • the terminal reads frequency domain resource 1 (or PDSCH1 corresponding to frequency domain resource 1) and TCI information corresponding to time unit 1 ⁇ TCI state#2, TCI state#3 ⁇ according to the index number of the spatial resource and time unit 1 State#2 is associated, and frequency domain resource 2 (or PDSCH2 corresponding to frequency domain resource 2) is associated with TCI state#3 on time unit 1.
  • the terminal reads the frequency domain resource 1 (or the PDSCH1 corresponding to the frequency domain resource 1) in the time unit 2 TCI state#3 is associated, and frequency domain resource 2 (or PDSCH2 corresponding to frequency domain resource 2) is associated with TCI state#2 in time unit 2.
  • the terminal obtains the TCI information associated with each frequency domain resource according to the index number of the frequency domain resource based on the FDM transmission mode. Then, based on the repeated transmission mode in the time domain, the TCI status on each time unit is read according to the time unit or the index number in the time domain.
  • the terminal reads the TCI information corresponding to frequency domain resource 1 according to the index number of the frequency domain resource as ⁇ TCI state#2,TCI state#3 ⁇ , which corresponds to frequency domain resource 2.
  • the TCI information is ⁇ TCI state#3,TCI state#2 ⁇ .
  • the terminal reads frequency domain resource 1 and associates with TCI state#2 on time unit 1, frequency domain resource 1 It is associated with TCI state#3 on time unit 2.
  • the terminal reads the frequency domain resource 2 which is associated with TCI state#3 on the time unit 1.
  • the frequency domain resource 2 is associated with TCI state#2 on time unit 2.
  • the terminal reads the TCI information corresponding to frequency domain resource 1 from ⁇ TCI state#2,TCI state#3 ⁇ as ⁇ TCI state#2,TCI state#3 ⁇ ; based on preset change rules, such as cyclic shift, obtain the frequency domain
  • the TCI information corresponding to resource 2 is ⁇ TCI state#3,TCI state#2 ⁇ .
  • the terminal reads that the frequency domain resource 1 is associated with the TCI state#2 on the time unit 1. 2 is associated with TCI state#3.
  • the terminal reads that the frequency domain resource 2 is associated with TCI state#3 on the time unit 1.
  • the frequency domain resource 2 is associated with TCI state#2 on time unit 2.
  • the terminal reads the TCI information corresponding to the index number of each airspace resource according to the index number of the airspace resource. Then, the terminal reads the TCI state associated with the index number of each airspace resource on each time unit according to the index number of the time unit (index number in the time domain) and the TCI information corresponding to the index number of each airspace resource.
  • the terminal reads the TCI information corresponding to layer0 (or antenna port 0, or CDM group 0, or PDSCH1) according to the index number of the airspace resource as ⁇ TCI state#2,TCI state #3 ⁇ , the TCI information corresponding to layer1 (or antenna port 2, or CDM group 1, or PDSCH2) is ⁇ TCI state#3,TCI state#2 ⁇ .
  • the terminal reads layer0 (or antenna port 0, or CDM) according to the index number of the time unit and the corresponding TCI information ⁇ TCI state#2,TCI state#3 ⁇ of layer0 (or antenna port 0, or CDM group 0, or PDSCH1) Group 0 (or PDSCH1) is associated with TCI state#2 on time unit 1, and layer0 (or antenna port 0, or CDM group 0, or PDSCH1) is associated with TCI state#3 on time unit 2.
  • the terminal reads layer1 (or antenna port 2, or CDM) according to the index number of the time unit and the corresponding TCI information ⁇ TCI state#3, TCI state#2 ⁇ of layer1 (or antenna port 2, or CDM group 1, or PDSCH2) Group 1, or PDSCH2) is associated with TCI state#3 on time unit 1, and layer1 (or antenna port 2, or CDM group 1, or PDSCH2) is associated with TCI state#2 on time unit 2.
  • the interpretation rule of the spatial domain first and then the time domain.
  • the terminal reads the TCI information corresponding to layer0 (or antenna port 0, or CDM group 0, or PDSCH1) from ⁇ TCI state#2,TCI state#3 ⁇ as ⁇ TCI state#2,TCI state#3 ⁇ , according to the preset
  • the change rule such as the cyclic shift rule, obtains the TCI information corresponding to layer1 (or antenna port 2, or CDM group 1, or PDSCH2) as ⁇ TCI state#3, TCI state#2 ⁇ .
  • the terminal is ⁇ TCI state#2,TCI state#3 ⁇ to obtain Layer0 (or antenna port 0, or CDM group 0, or PDSCH1) is associated with TCI state#2 on time unit 1, layer0 (or antenna port 0, or CDM group 0, or PDSCH1) is associated with TCI state on time unit 2 #3 Association.
  • the terminal obtains ⁇ TCI state#3,TCI state#2 ⁇ according to the index number of the time unit (or the index number in the time domain) and layer1 (or antenna port 2, or CDM group 1, or PDSCH2) corresponding to the TCI information
  • Layer1 (or antenna port 2, or CDM group 1, or PDSCH2) is associated with TCI state#3 on time unit 1
  • layer1 or antenna port 2, or CDM group 1, or PDSCH2 is associated with TCI state on time unit 2.
  • #2Association
  • the TCI states associated with the same physical shared channel determined on at least two time units are different. And in at least two time units, the same physical shared channel is transmitted by different network devices. In this way, it is possible to avoid the problem of poor reception performance of the physical shared channel transmitted by one of the network devices when the transmission power is poor. It can be seen that in the embodiment of the present application, the same physical shared channel is transmitted by multiple network devices, and multiple TCI states are associated, which can improve the robustness of transmission.
  • the methods provided in the embodiments of the present application are introduced from the perspective of network equipment, terminal, and interaction between the network equipment and the terminal.
  • the network device and the terminal may include a hardware structure and a software module, and the above functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module.
  • One of the above-mentioned functions can be executed in a hardware structure, a software module, or a hardware structure plus a software module.
  • FIG. 18 is a schematic structural diagram of an apparatus provided by an embodiment of the application.
  • the device can be used to implement the method described in the foregoing method embodiment, and for details, please refer to the description in the foregoing method embodiment.
  • the apparatus may include one or more processors 1801.
  • the processor 1801 may also be referred to as a processing unit, and may implement the functions of the network device or the terminal device in the method provided in the embodiment of the present application.
  • the processor 1801 may be a general-purpose processor or a special-purpose processor.
  • the processor 1801 may be called a processing unit, and controls the device 1800.
  • the processor 1801 may also store an instruction 1803, and the instruction 1803 may be executed by the processor, so that the apparatus 1800 executes the method described in the foregoing method embodiment.
  • the processor 1801 may include a communication unit for implementing receiving and sending functions.
  • the communication unit may be a transceiver circuit, or an interface, or an interface circuit.
  • the processor 1801 can implement the method executed by the network device or the method executed by the terminal device in the method provided in the embodiments of the present application through the communication unit.
  • the device 1800 may include one or more memories 1802, on which instructions 1804 may be stored.
  • the instructions may be executed on the processor, so that the apparatus 1800 executes the method described in the foregoing method embodiment.
  • data may also be stored in the memory.
  • the processor 1801 and the memory 1802 can be provided separately or integrated together.
  • the device 1800 may further include a transceiver 1805 and an antenna 1806.
  • the transceiver 1805 may be referred to as a communication unit, a transceiver, a transceiver circuit or a transceiver, etc., for implementing the transceiver function.
  • a device 1800 (for example, a terminal, a chip in the terminal) may include:
  • the transceiver is used to receive the transmission configuration indication TCI information
  • a processor configured to determine the TCI state associated with the first physical shared channel and the TCI state associated with the second physical shared channel on the first time unit according to the TCI information
  • the first time unit is the time unit of the K time units corresponding to K repeated transmissions;
  • the K is an integer greater than or equal to 2;
  • the first physical shared channel and the second physical shared channel are at any time Parallel transmission on the unit;
  • At least two of the K time units have different TCI states associated with the same physical shared channel.
  • the apparatus 1800 can receive the physical shared channel transmitted by different network devices corresponding to different TCI states. This avoids the problem that the same physical shared channel can only be transmitted by the same network device, and when the network device has a transmission power difference, the problem of poor reception performance of the physical shared channel is caused. It can be seen that this application can improve the robustness of transmission.
  • the processor 1801 determines the TCI state associated with each physical shared channel on each time unit according to the TCI information, please refer to the relevant content described in FIG. 15 above.
  • the preset change rules satisfied by the association relationship between each physical shared channel and the TCI state can also be referred to the related content described in the foregoing FIG. 8, FIG. 9, FIG. 11, FIG. 12, and FIG. No more details here.
  • a device 1800 for example, network equipment, base station, DU or CU, TRP or baseband chip
  • a device 1800 may include:
  • the processor 1801 is configured to determine transmission configuration indication TCI information; the TCI information is used to indicate the TCI state associated with the first physical shared channel and the second physical shared channel transmitted on the time unit;
  • the transceiver 1805 is configured to transmit the first physical shared channel and the second physical shared channel on at least two time units; and send transmission configuration indication TCI information; the TCI information is used to indicate the first physical shared channel transmitted on the time unit A TCI state associated with a physical shared channel and a second physical shared channel;
  • the first physical shared channel and the second physical shared channel are multiplexed and are associated with different TCI states; on at least two different time units, The first physical shared channel and the second physical shared channel are associated with the same TCI state.
  • the processor 1801 may also determine to transmit the first physical shared channel and the second physical shared channel on at least two time units.
  • the transceiver 1805 can transmit different physical shared channels on at least two time units, such as the first physical shared channel and the second physical shared channel, thereby avoiding the device from only transmitting the same on each time unit.
  • a physical shared channel once the transmission power of the network device is poor, the receiving performance of the physical shared channel is poor. It can be seen that this application can improve the robustness of transmission.
  • a device 1800 for example, an integrated circuit, a wireless device, a circuit module, or a terminal device, etc. may include:
  • the transceiver 1805 is used to receive transmission configuration indication TCI information
  • the processor 1801 is configured to determine the TCI state associated with the first physical shared channel on the first time unit and the TCI state associated on the second time unit according to the TCI information.
  • the first time unit is a time unit among K time units corresponding to K repeated transmissions.
  • the TCI state associated with the first physical shared channel on the first time unit is different from the TCI state associated with the second time unit.
  • the TCI state associated with each time unit of the first physical shared channel is different, and the corresponding network devices corresponding to the different TCI states are transmitted. This avoids the problem of poor reception performance of the first physical shared channel once a network device has poor transmission power. It can be seen that this application can improve the robustness of transmission.
  • the physical shared channel sent by the transceiver 1805 in each time unit can satisfy the preset change rule.
  • the preset change rules satisfied by the association relationship between each physical shared channel and the TCI state can also be referred to the related content described in the foregoing FIG. 8, FIG. 9, FIG. 11, FIG. 12, and FIG. No more details here.
  • FIG. 19 provides a schematic structural diagram of a terminal device.
  • the terminal equipment can be applied to the scenes shown in Figure 1 and Figure 2.
  • FIG. 19 only shows the main components of the terminal device.
  • the terminal device includes a processor 1912, a memory, a control circuit, an antenna, and an input and output device.
  • the processor 1912 is mainly used to process the communication protocol and communication data, and to control the entire terminal, 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.
  • the processor 1912 can read the software program in the storage unit, parse and execute the instructions of the software program, and process the data of the software program.
  • 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 processes the baseband signal to obtain a radio frequency signal and sends the radio frequency signal out in the form of electromagnetic waves through the antenna. .
  • the radio frequency circuit receives the radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor, and the processor converts the baseband signal into data and performs processing on the data. deal with.
  • FIG. 19 only shows one memory and processor 1912.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present invention.
  • the processor 1912 may include a baseband processor and a central processor.
  • the baseband processor is mainly used to process communication protocols and communication data
  • the central processor is mainly used to control the entire terminal device. Execute the software program and process the data of the software program.
  • the terminal device may include multiple baseband processors to adapt to different network standards
  • the terminal device may include multiple central processors to enhance its processing capabilities
  • various components of the terminal device may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and control circuit with the transceiver function may be regarded as the communication unit 1911 of the terminal device, and the processor with the processing function may be regarded as the processing unit 1912 of the terminal device.
  • the terminal device includes a communication unit 1911 and a processing unit 1912.
  • the communication unit may also be referred to as a transceiver, transceiver, transceiving device, and so on.
  • the device for implementing the receiving function in the communication unit 1911 can be regarded as the receiving unit, and the device for implementing the sending function in the communication unit 1911 as the sending unit, that is, the communication unit 1911 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the foregoing receiving unit and sending unit may be an integrated unit or multiple independent units.
  • the above-mentioned receiving unit and sending unit may be in one geographic location, or may be scattered in multiple geographic locations.
  • the device 2000 may include: a processing unit 2002.
  • it may further include a communication unit 2001 and a storage unit 2003.
  • one or more units as shown in Fig. 20 may be implemented by one or more processors, or by one or more processors and memories; or by one or more processors It can be implemented with a transceiver; or implemented by one or more processors, memories, and transceivers, which is not limited in the embodiment of the present application.
  • the processor, memory, and transceiver can be set separately or integrated.
  • the device has the function of realizing the terminal device or network device described in the embodiment of this application.
  • the device includes a terminal device to execute the module or unit or means corresponding to the steps involved in the terminal device or network device described in the embodiment of this application ( means), the function or unit or means (means) can be realized by software, or by hardware, or by hardware executing corresponding software, or by a combination of software and hardware.
  • the function or unit or means can be realized by software, or by hardware, or by hardware executing corresponding software, or by a combination of software and hardware.
  • the device may be a terminal or a component of the terminal (for example, an integrated circuit, a chip, etc.).
  • an apparatus 2000 may include:
  • the communication unit 2001 is configured to receive transmission configuration indication TCI information
  • the processing unit 2002 is configured to determine the TCI state associated with the first physical shared channel and the TCI state associated with the second physical shared channel on the first time unit according to the TCI information;
  • the first time unit is the time unit of the K time units corresponding to K repeated transmissions; the K is an integer greater than or equal to 2; the first physical shared channel and the second physical shared channel are at any time Parallel transmission on the unit; on at least two of the K time units, the TCI states associated with the same physical shared channel are different.
  • an apparatus 2000 may include:
  • the communication unit 2001 is configured to receive transmission configuration indication TCI information
  • the processing unit 2002 is configured to determine the TCI status associated with the first physical shared channel on the first time unit and the TCI status associated on the second time unit according to the TCI information.
  • the first time unit is a time unit among K time units corresponding to K repeated transmissions.
  • the TCI state associated with the first physical shared channel on the first time unit is different from the TCI state associated with the second time unit.
  • the TCI state associated with each time unit of the first physical shared channel is different, and the corresponding network devices corresponding to the different TCI states are transmitted. This avoids the problem of poor reception performance of the first physical shared channel once a network device has poor transmission power. It can be seen that this application can improve the robustness of transmission.
  • the device can determine the TCI state associated with each physical shared channel on each time unit based on various optional implementation manners described in the above-mentioned Figure 8, Figure 9, Figure 11, Figure 12, and Figure 14, so as to be based on the TCI state , Perform channel estimation on the associated physical shared channel to receive the associated physical shared channel. Since the TCI state associated with each physical shared channel satisfies the above-mentioned preset change rule, there can be multiple channel estimation results corresponding to each physical shared channel, which is conducive to achieving robust transmission of each physical shared channel Sex.
  • the device may also be a network device, or a component of a network device (for example, an integrated circuit, a chip, etc.).
  • the device may also be another communication unit for implementing the method in the embodiment of the present application.
  • an apparatus 2000 may include:
  • the processing unit 2002 is configured to determine transmission configuration indication TCI information; the TCI information is used to indicate the TCI status associated with the first physical shared channel and the second physical shared channel transmitted on the time unit;
  • the communication unit 2001 is configured to transmit the first physical shared channel and the second physical shared channel on at least two time units; and send transmission configuration indication TCI information;
  • the first physical shared channel and the second physical shared channel are multiplexed and are associated with different TCI states; on at least two different time units, The first physical shared channel and the second physical shared channel are associated with the same TCI state.
  • the processing unit 2002 is further configured to determine that the first physical shared channel and the second physical shared channel are transmitted on at least two time units.
  • the device can respectively transmit different physical shared channels on at least two time units, thereby avoiding that the first network device only transmits the same physical shared channel on each time unit, resulting in a transmission power difference of the first network device.
  • the physical shared channel transmitted by it has a problem of poor reception performance.
  • the physical shared channel sent by the communication unit 2001 in each time unit can satisfy the preset change rule. For details, please refer to the related content described in FIG. 7, FIG. 10, and FIG.
  • the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or Perform the methods, steps, and logic block diagrams disclosed in the embodiments of the present application.
  • the general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), for example Random-access memory (random-access memory, RAM).
  • the memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of realizing a storage function, for storing program instructions and/or data.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk, SSD)) etc.

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

Abstract

La présente invention concerne un procédé de détermination d'indication d'état de configuration de transmission (TCI), un canal de transmission, et un dispositif associé. Lors du procédé de détermination d'indication d'état TCI, pour K unités temporelles correspondant à K transmissions de répétition, il est déterminé, selon l'information d'indication d'état TCI, que des états TCI associés à un même canal physique partagé transmis sur au moins deux unités temporelles sont différents. Lors du procédé de transmission de canal, sur lesdites au moins deux unités temporelles, le même canal partagé physique est transmis par différents dispositifs de réseau et associés à différents états TCI. Le problème selon lequel un même canal PDSCH est toujours transmis par un dispositif de réseau à un dispositif terminal, de sorte que lorsqu'un parmi une pluralité de dispositifs de réseau possède une faible puissance de transmission, le canal partagé physique transmis par le dispositif de réseau ayant une faible puissance de transmission possède une faible performance de réception est résolu. Un même canal partagé physique est transmis par une pluralité de dispositifs de réseau et associé à une pluralité d'états TCI, permettant d'améliorer la robustesse de transmission.
PCT/CN2020/109362 2019-08-15 2020-08-14 Procédé de détermination d'indication d'état de configuration de transmission, canal de transmission et dispositif associé WO2021027946A1 (fr)

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