WO2021056568A1 - 发送和接收侧行控制信息的方法、终端装置和系统 - Google Patents

发送和接收侧行控制信息的方法、终端装置和系统 Download PDF

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Publication number
WO2021056568A1
WO2021056568A1 PCT/CN2019/109208 CN2019109208W WO2021056568A1 WO 2021056568 A1 WO2021056568 A1 WO 2021056568A1 CN 2019109208 W CN2019109208 W CN 2019109208W WO 2021056568 A1 WO2021056568 A1 WO 2021056568A1
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Prior art keywords
terminal device
sci
level
level sci
reference signal
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PCT/CN2019/109208
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English (en)
French (fr)
Inventor
苏宏家
郭文婷
向铮铮
卢磊
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2019/109208 priority Critical patent/WO2021056568A1/zh
Priority to EP19947412.3A priority patent/EP4024914B1/en
Priority to CN201980100425.0A priority patent/CN114402636B/zh
Publication of WO2021056568A1 publication Critical patent/WO2021056568A1/zh
Priority to US17/707,701 priority patent/US12289724B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056Systems characterized by the type of code used
    • H04L1/0061Error detection codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30Services specially adapted for particular environments, situations or purposes
    • H04W4/40Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]

Definitions

  • This application relates to the field of Internet of Vehicles, and more specifically, to a method and terminal device for sending side-line control information, and a method, terminal device, and system for receiving side-line control information.
  • Vehicle to everything (V2X) communication refers to the communication between the vehicle and anything outside, such as the communication between the vehicle and the vehicle, the communication between the vehicle and the pedestrian, the communication between the vehicle and the infrastructure, the communication between the vehicle and the network, and so on.
  • Vehicle-user equipment (V-UE) can send some of its own information, such as position, speed, and intent (turning, merging, or reversing, etc.) to surrounding V-UEs.
  • V-UE The UE will also receive the information of the surrounding V-UEs, and complete the communication between the V-UEs, that is, sidelink communication.
  • the downlink control information (DCI) sent by the base station to the terminal equipment is carried through a physical downlink control channel (PDCCH).
  • the PDCCH uses control channel elements (CCE) as a unit for resource mapping. How many CCEs a PDCCH consists of depends on the size and code rate of the DCI carried by the PDCCH. Among them, the number of CCEs included in a PDCCH is defined as an aggregation level (AL).
  • the terminal device decodes the PDCCH by performing blind decoding (BD) with the CCE as a unit, and then obtains the DCI.
  • BD blind decoding
  • V2X communication Similar to downlink communication, V2X communication also introduces the physical sidelink control channel (PSCCH) and the physical sidelink shared channel (PSSCH).
  • PSCCH is used to carry sidelink control information (sidelink control information, SCI)
  • SCI is used to schedule PSSCH, so that side-line communication between V-UEs can be carried out.
  • the 3rd generation partnership project (3GPP) standards organization proposed that two levels of SCI (ie, 2-level SCI) should be used in sideline communications systems such as V2X.
  • the stage SCI) scheme that is, the sending end device generates the first-level SCI, the first-level SCI indicates the second-level SCI, and the first-level and second-level SCI together form a complete side-line control information.
  • the two-level SCI solution It may not be suitable for all situations. If two-level SCI is used in all cases, it may cause waste of resources.
  • the present application provides a method and terminal device for sending and receiving side-line control information, which can improve resource utilization efficiency in side-line communication.
  • the present application provides a method for sending side-line control information.
  • the method includes: a first terminal device sends a first-level side-line control information SCI to a second terminal device, where the first-level SCI includes a first indication Information, the first indication information is used to indicate whether the first terminal device sends second-level side-line control information SCI to the second terminal device;
  • the first indication information indicates that the first terminal device does not send second-level side-line control information SCI to the second terminal device, and the first terminal device sends the second terminal device to the second terminal device according to the first-level SCI.
  • the device sends the physical side-line shared channel PSSCH, or
  • the first indication information instructs the first terminal device to send second-level side line control information SCI to the second terminal device, and the first terminal device is based on the first-level SCI and the second-level SCI
  • the physical side shared channel PSSCH is transmitted to the second terminal device.
  • the sender device that is, the first terminal device of the side-line communication passes the first-level SCI, or the first-level SCI
  • the cyclic redundancy check bit of the SCI, or the reference signal used to demodulate the first-level SCI instructs the transmitting end device not to send the second-level SCI to the receiving end device (that is, the second terminal device). Therefore, according to the specific scenario of side-line communication, the sending end device can flexibly choose to use two-level SCI or one-level SCI.
  • the sender device can use the resources corresponding to the second-level SCI for data transmission, etc., which can avoid the use of two-level SCI in any scenario of side-line communication. Waste of resources.
  • the spectrum efficiency of the side-line communication system can also be improved.
  • the sending end device of the sideline communication does not send the second level SCI to the receiving end device, which means that the second level SCI does not exist.
  • the transmitting end device of the side-line communication only uses the first-level SCI to schedule the PSSCH.
  • the first indication information is used to indicate whether the first terminal device sends second-level sideline control information SCI to the second terminal device, including :
  • the first level SCI includes an aggregation level AL field, the AL field has at least two valid values, the at least two valid values include a first valid value, and the first valid value is 0, 0 For instructing the first terminal device not to send the second level SCI to the second terminal device; and,
  • other valid values other than the first valid value are used to instruct the first terminal device to send the second-level SCI to the second terminal device, and any One of the other valid values is specifically used to indicate the aggregation level of the second-level SCI.
  • the first indication information is used to indicate whether the first terminal device sends second-level sideline control information SCI to the second terminal device, including :
  • the first indication information has at least two valid values, and the first valid value of the at least two valid values is used to instruct the first terminal device not to send the first terminal device to the second terminal device.
  • Level 2 SCI
  • the second valid value of the at least two valid values is used to instruct the first terminal device to send the second level SCI to the second terminal device, and the first level SCI further includes aggregation Level AL field, the effective value of the AL field is used to indicate the aggregation level of the second level SCI.
  • the first terminal device carries the first indication information in the first-level SCI to instruct the second terminal device that the first terminal device does not send the second-level SCI to the second terminal device.
  • the mandatory scheme of two-level SCI can be flexibly removed according to the side-line communication scenario, to avoid waste of resources, and at the same time, the spectrum efficiency of the side-line communication system can be improved.
  • the first indication information indicates that the first terminal device does not send second-level side control information SCI to the second terminal device, and the first A terminal device transmits a physical side-line shared channel PSSCH to the second terminal device according to the first level SCI, where the transmission type of the PSSCH is broadcast.
  • the first terminal device does not send the second-level SCI to the second terminal device, so that the resources used to send the second-level SCI are used for other purposes , For example, for data transmission, which can avoid waste of resources, and can also improve the spectrum efficiency of the side-line communication system.
  • the present application provides a method for sending side-line control information.
  • the method includes: a first terminal device sends a first-level side-line control information SCI to a second terminal device, and the cyclic redundancy corresponding to the first SCI
  • the surplus parity bit is scrambled by scrambling information, where the scrambling information includes a first identifier or a second identifier, and the first identifier is used to indicate that the first terminal device does not report to the second terminal device.
  • Sending a second-level SCI where the second identifier is used to instruct the first terminal device to send the second-level SCI to the second terminal device;
  • the scrambling information includes a first identifier, and the first terminal device sends a physical side shared channel PSSCH to the second terminal device according to the first level SCI, or
  • the scrambling information includes a second identifier, and the first terminal device transmits a physical side shared channel PSSCH to the second terminal device according to the first level SCI and the second level SCI.
  • the first terminal device uses different identifiers to scramble the CRC of the first level SCI to implicitly indicate to the second terminal device whether the first terminal device sends the second level SCI to the second terminal device.
  • the first terminal device indicates to the second terminal device whether the first terminal device sends the second-level SCI, and no signaling or instruction resource overhead is caused.
  • the scrambling information includes a first identifier, and the first terminal device sends the PSSCH to the second terminal device according to the first level SCI , The transmission type of the PSSCH is broadcast.
  • the present application provides a method for sending side-line control information, the method comprising: a first terminal device sends a first-level side-line control information SCI to a second terminal device;
  • the first terminal device sends a reference signal to the second terminal device, where the reference signal includes a first reference signal or a second reference signal, and the first reference signal is used to instruct the first terminal
  • the device does not send the second-level SCI to the second terminal device, and the second reference signal is used to instruct the first terminal device to send the second-level SCI to the second terminal device;
  • the reference signal includes a first reference signal, and the first terminal device sends a physical side shared channel PSSCH to the second terminal device according to the first level SCI;
  • the reference signal includes a second reference signal, and the first terminal device transmits the PSSCH to the terminal device according to the first level SCI and the second level SCI.
  • the first terminal device uses different reference signals for the second terminal device to perform channel estimation on the PSCCH carrying the first-level SCI to decode the first-level SCI, and can implicitly indicate to the second terminal device whether the first terminal device is
  • the second terminal device sends the second-level SCI, and the first terminal device can indicate to the second terminal device whether the first terminal device sends the second-level SCI without changing the structure of the first-level SCI, without signaling Or indicate the cost of resources.
  • the reference signal includes the first reference signal
  • the first terminal device sends the signal to the second The terminal device transmits the PSSCH, where the transmission type of the PSSCH is broadcast.
  • the reference signal includes a demodulation reference signal DMRS used to demodulate the side-line physical control channel PSCCH carrying the first-level SCI,
  • the first reference signal is a first DMRS
  • the second reference signal is a second DMRS.
  • the existing DMRS used to perform channel estimation on the PSCCH carrying the first-level SCI implicitly indicates whether the first terminal device sends the second-level SCI to the second terminal device, without incurring signaling or indicating resource overhead.
  • the methods for sending side-line control information in the following fourth to sixth aspects are methods executed by the receiving end device of side-line communication.
  • the beneficial technical effects that can be achieved by each of the technical solutions please refer to the first The description of the corresponding solutions from the aspect to the third aspect will not be repeated here.
  • the present application provides a method for receiving side-line control information.
  • the method includes: a second terminal device receives a first-level SCI from a first terminal device, the first-level SCI includes first indication information, and The first indication information is used to indicate whether the first terminal device sends a second-level SCI to the second terminal device;
  • the first indication information indicates that the first terminal device does not send the second-level SCI to the second terminal device, and the second terminal device receives from the first terminal device according to the first-level SCI
  • the first indication information instructs the first terminal device to send the second level SCI to the second terminal device, and the second terminal device receives according to the first level SCI and the second level SCI PSSCH from the first terminal device.
  • the first indication information is used to indicate whether the first terminal device sends second-level side control information SCI to the second terminal device, including :
  • the first level SCI includes an aggregation level AL field, the AL field has at least two valid values, the at least two valid values include a first valid value, and the first valid value is 0, 0 For instructing the first terminal device not to send the second level SCI to the second terminal device; and,
  • other valid values other than the first valid value are used to instruct the first terminal device to send the second-level SCI to the second terminal device, and any One of the other valid values is specifically used to indicate the aggregation level of the second-level SCI.
  • the first indication information is used to indicate whether the first terminal device sends second-level side control information SCI to the second terminal device, including :
  • the first indication information has at least two valid values, and the first valid value of the at least two valid values is used to instruct the first terminal device not to send the first terminal device to the second terminal device.
  • Level 2 SCI
  • the second valid value of the at least two valid values is used to instruct the first terminal device to send the second level SCI to the second terminal device, and the first level SCI further includes aggregation Level AL field, the effective value of the AL field is used to indicate the aggregation level of the second level SCI.
  • the first indication information indicates that the first terminal device does not send a second-level SCI to the second terminal device, and the second terminal device is based on The first level SCI receives the PSSCH from the first terminal device, wherein the transmission type of the PSSCH is broadcast.
  • the present application provides a method for receiving side-line control information.
  • the method includes: a second terminal device receives first-level side-line control information SCI from a first terminal device, and the first-level SCI corresponds to The cyclic redundancy check bit is scrambled by scrambling information, where the scrambling information includes a first identifier or a second identifier, and the first identifier is used to indicate that the first terminal device does not send a message to the second terminal.
  • the device sends a second-level SCI, where the second identifier is used to instruct the first terminal device to send the second-level SCI to the second terminal device;
  • the scrambling information includes a first identifier, and the second terminal device receives the PSSCH from the first terminal device according to the first level SCI; or,
  • the scrambling information includes a second identifier, and the second terminal device receives the PSSCH from the first terminal device according to the first level SCI and the second level SCI.
  • the scrambling information includes a first identifier, and the second terminal device receives the information from the first terminal device according to the first level SCI.
  • PSSCH where the transmission type of the PSSCH is broadcast.
  • the present application provides a method for receiving side-line control information, the method comprising: a second terminal device receives first-level side-line control information SCI from the first terminal device;
  • the second terminal device detects a reference signal from the first terminal device, where the reference signal includes a first reference signal or a second reference signal, and the first reference signal is used to indicate the first reference signal.
  • the terminal device does not send the second-level SCI to the second terminal device, and the second reference signal is used to instruct the first terminal device to send the second-level SCI to the second terminal device;
  • the reference signal includes the first reference signal, and the second terminal device receives the physical side shared channel PSSCH from the first terminal device according to the first level SCI; or,
  • the reference signal includes the second reference signal, and the second terminal device receives the PSSCH from the first terminal device according to the first level SCI and the second level SCI.
  • the reference signal includes the first reference signal
  • the second terminal device receives the data from the second terminal device according to the first level SCI For the PSSCH, the transmission type of the PSSCH is broadcast.
  • the reference signal includes a demodulation reference signal DMRS used to demodulate the side-line physical control channel PSCCH carrying the first-level SCI, and the first The reference signal is a first DMRS, and the second reference signal is a second DMRS.
  • DMRS demodulation reference signal
  • the present application provides a terminal device that has the function of implementing the method in the first aspect or any possible implementation manner thereof, or implements the method in the second aspect or any possible implementation manner thereof
  • the function of the method, or the function of the method in the third aspect or any possible implementation manner thereof can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above-mentioned functions.
  • the present application provides a terminal device that has the function of implementing the method in the fourth aspect or any possible implementation manner thereof, or implements the method in the fifth aspect or any possible implementation manner thereof
  • the function of the method, or the function of the method in the sixth aspect or any possible implementation manner thereof can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units corresponding to the above-mentioned functions.
  • this application provides a terminal device, including a processor, a memory, and a transceiver.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory, and control the transceiver to send and receive signals, so that the terminal device executes the method in the first aspect or any possible implementation manner thereof, or, The method in the second aspect or any possible implementation manner thereof is executed, or the method in the third aspect or any possible implementation manner thereof is executed.
  • this application provides a terminal device, including a processor, a memory, and a transceiver.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory, and control the transceiver to send and receive signals, so that the terminal device executes the method in the fourth aspect or any possible implementation manner thereof, or, The method in the fifth aspect or any possible implementation manner thereof is executed, or the method in the sixth aspect or any possible implementation manner thereof is executed.
  • the present application provides a computer-readable storage medium having computer instructions stored in the computer-readable storage medium.
  • the computer instructions run on a computer, the computer executes the first aspect or any possible implementation thereof.
  • the present application provides a computer-readable storage medium having computer instructions stored in the computer-readable storage medium.
  • the computer instructions run on a computer, the computer executes the fourth aspect or any possible implementation thereof.
  • the present application provides a computer program product, the computer program product includes computer program code, when the computer program code runs on a computer, the computer executes the first aspect or any of its possible implementations Or, execute the method in the second aspect or any possible implementation manner thereof, or execute the method in the third aspect or any possible implementation manner thereof.
  • this application provides a computer program product.
  • the computer program product includes computer program code.
  • the computer program code runs on a computer, the computer executes the fourth aspect or any of its possible implementations. Or, execute the method in the fifth aspect or any possible implementation manner thereof, or execute the method in the sixth aspect or any possible implementation manner thereof.
  • the present application provides a terminal device, including a processor and an interface circuit, the interface circuit is used to receive computer code or instructions, and transmit to the processor, the processor is used to run the computer code Or instructions to execute the method in the first aspect or any possible implementation manner thereof, or to execute the method in the second aspect or any possible implementation manner thereof, or to execute the third aspect or any possible implementation manner thereof Methods.
  • the present application provides a terminal device, including a processor and an interface circuit, the interface circuit is used to receive computer code or instructions, and transmit to the processor, the processor is used to run the computer code Or instructions to execute the method in the fourth aspect or any possible implementation manner thereof, or to execute the method in the fifth aspect or any possible implementation manner thereof, or to execute the sixth aspect or any possible implementation manner thereof Methods.
  • the present application provides a side-line communication system, including the terminal device as described in the ninth aspect and/or the terminal device as described in the tenth aspect.
  • Figure 1 is a schematic diagram of a V2X communication scenario.
  • FIG. 2 is a flowchart of a method 200 for sending side control information provided by this application.
  • FIG. 3 is a flowchart of a method 300 for sending side control information provided by this application.
  • FIG. 4 is a flowchart of a method 400 for sending side control information provided by this application.
  • FIG. 5 is a schematic block diagram of the terminal device 1000 provided by this application.
  • FIG. 6 is a schematic block diagram of a terminal device 2000 provided by this application.
  • FIG. 7 is a schematic structural diagram of the terminal device 10 provided by the present application.
  • FIG. 8 is a schematic structural diagram of the terminal device 20 provided by the present application.
  • V2X vehicle-to-everything
  • V2V vehicle-to-everything
  • V2I vehicle-to-everything
  • V2P vehicle-to-everything
  • V2N intelligent connected vehicles
  • ICV intelligent connected vehicles
  • D2D autonomous driving or assisted driving
  • FIG. 1 is a schematic diagram of a V2X communication scenario.
  • V-UE vehicle user equipment
  • RSU roadside unit
  • SL sidewalk Link
  • DL downlink
  • uplink uplink
  • Uu air interface corresponding DL communication and UL communication are also called Uu communication.
  • both parties in the communication are terminal devices.
  • the terminal equipment mentioned in this application can also be called a terminal device, including but not limited to user equipment (UE), wireless terminal equipment, mobile terminal equipment, and device-to-device communication (device-to-device, D2D). ) Terminal equipment, V2X terminal equipment, machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, user terminal, user agent, Or user equipment (user device), etc.
  • UE user equipment
  • M2M/MTC machine-type communications
  • IoT Internet of things
  • user terminal user agent
  • user equipment user device
  • it may include a mobile phone (or called a "cellular" phone), a computer with mobile terminal equipment, such as a portable, pocket-sized, handheld, and a mobile device with a built-in computer.
  • the terminal device may also be a vehicle-mounted communication module or other embedded communication module.
  • the in-vehicle communication module may also be called an in-vehicle terminal device or an on-board unit (OBU).
  • the terminal device of the embodiment of the present application may also be an on-board module, on-board module, on-board component, on-board chip, or on-board unit built into a vehicle as one or more components or units.
  • the vehicle can implement the method of the present application through the built-in vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit.
  • the network equipment mentioned in this application includes access network (AN) equipment, such as a base station (e.g., access point), which may refer to the access network through one or more cells at the air interface to communicate with the wireless
  • AN access network
  • the device for terminal device communication or, for example, a network device in a vehicle-to-everything (V2X) technology is a road side unit (RSU).
  • the base station can be used to convert the received air frame and IP packet to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network can include the IP network.
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment may include a long term evolution (LTE) system or an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution-advanced (LTE-A) system, or may comprise a fifth generation mobile communication technology (the 5 th generation, 5G) a new air interface (new radio, NR) system (also referred to as NR system) Next Generation node B (next generation node B, gNB ) or else It may include a centralized unit (CU) and a distributed unit (DU) in a cloud radio access network (Cloud RAN) system, which is not limited in the embodiment of the present application.
  • LTE long term evolution
  • LTE-A long term evolution-advanced
  • LTE-A long term evolution-advanced
  • 5G 5 th generation
  • NR new air interface
  • Next Generation node B next generation node
  • network equipment may also include core network equipment, but because the technical solutions provided in the embodiments of this application mainly involve access network equipment, in the following text, unless otherwise specified, the “core network equipment” described refers to Core network equipment, and the description of "network equipment” or “access network equipment” refers to the access network equipment.
  • the sending-end device sends side-line scheduling information for scheduling the receiving-end device to receive data information
  • the side-line scheduling information is the SCI.
  • the SCI of the side-line communication system can be divided into two levels, namely the first level SCI (1 st -stage SCI) and the second level SCI (2 nd -stage SCI).
  • SCI can also include more than two levels of SCI.
  • the first-level SCI is carried on the physical sidelink control channel (PSCCH).
  • the first level of SCI contains side-line control information for decoding PSSCH.
  • the first level SCI may include one or more of the following fields:
  • the priority field of the scheduled physical sidelink shared channel is used to indicate the priority information of the PSSCH, which can be 3 bits or 4 bits in length;
  • the field of the scheduling information of the time-frequency resource of the PSSCH may be 8 bits or 9 bits in length
  • the resource reservation information field of the PSSCH used for retransmission for example, the time interval of different retransmitted PSSCHs can be 4 bits or 5 bits in length);
  • the sequence number field used for PSSCH retransmission can indicate how many times the current PSSCH is retransmitted, and it can be 2 bits in length);
  • the resource reservation information field used for the newly transmitted PSSCH for example, the resource reservation used for periodic services can be 4 or 5 bits in length);
  • PSSCH modulation and coding scheme (modulation and coding scheme, MCS) field, which can be 5 bits in length);
  • PSSCH demodulation reference signal demodulation reference signal, DMRS
  • pattern indication information field may be 2 or 3 bits in length
  • the format indication information of the second-level SCI can indicate whether the content contained in the second-level SCI includes the location information of the transmitting end device, the requirement information of the communication range for receiving the PSSCH, etc., that is, whether the HARQ feedback mode of the PSSCH is based on sending and receiving.
  • the communication distance of the end is only the way of feeding back NACK, or the way of feeding back ACK and/or NACK. Indirectly, it can also be used to distinguish unicast transmission or multicast transmission with group establishment and maintenance, or multicast transmission without group establishment and maintenance, which can be 1 bit); and,
  • the resource pool identity field is used to distinguish different resource pools and can be 4 bits or 5 bits in length. Among them, the resource pool is used for side-line communication between the sending end device and the receiving end device for side-line communication A collection of available time-frequency resources.
  • the first level SCI may also include the resource indication information field of the second level SCI.
  • the resource indication information field may be, for example, an AL field (may be 3 or 4 bits in length), and the AL field is used to indicate the second The AL of the second-level SCI, that is, the resources of the second-level SCI are aggregated by how many basic resource units used to transmit the second-level SCI.
  • the second-level SCI includes other side-line control information required for decoding the PSSCH in addition to the side-line control information included in the first-level SCI.
  • the second level SCI may include one or more of the following fields:
  • the HARQ activation information field indicates whether the receiving end device needs to feed back HARQ-ACK information (for example, ACK or NACK) to the sending end device on a physical sidelink feedback channel (PSFCH).
  • the HARQ activation information field may contain 1-bit information, one of which is a valid value, such as "1", is used to indicate unicast transmission and/or multicast transmission. That is, the HARQ (Tx-Rx distance-based HARQ) multicast method is not based on the transmission distance of the sender device-receiver device, that is, the receiver device of the multicast is known to the sender device, and the receiver device The device will feed back ACK if it receives data correctly, and NACK if it receives data incorrectly. It can be inferred that another valid value of the HARQ activation information field, such as "0", indicates that the receiving end device does not need to feed back HARQ information.
  • the second-level SCI has the required information field for the communication range of receiving PSSCH (used to feedback HARQ (Tx-Rx distance-based HARQ) multicast based on the transmission distance of the sender device-the receiver device), when receiving PSSCH communication
  • the value of the range request information is 0, it means that the receiver device in the multicast mode based on the transmission distance between the sender device and the receiver device does not need to feed back HARQ information; when the value of the request information for the PSSCH communication range is greater than 0, Then, HARQ information needs to be fed back.
  • the first level SCI and the second level SCI together form a complete side line control information to instruct the receiving end device to receive the PSSCH. Therefore, the data transmission process in side-line communication is roughly as follows:
  • the sending end device sends the PSCCH to the receiving end device, and the first level SCI is carried on the PSCCH.
  • the receiving end device performs channel estimation on the PSCCH carrying the first-level SCI according to the DMRS from the transmitting end device, so as to decode the first-level SCI, and then obtain the sideline control information included in the first-level SCI for decoding the PSSCH.
  • the receiving end device can learn the AL of the second level SCI according to the AL field of the first level SCI, and then receive the second level SCI, and obtain the side line control included in the second level SCI in addition to the first level SCI.
  • Information used to decode PSSCH other side line control information can be learned.
  • the receiving end device receives and decodes the PSSCH to complete the side-line communication.
  • the two-level SCI scheme is not suitable for all scenarios of side-line communication.
  • the network equipment scheduling resource mode and the terminal equipment autonomously select the resource transmission mode.
  • the instructions of the second level SCI may not be required.
  • all the side-line scheduling information required to transmit the side-line broadcast data can be included in the first-level SCI.
  • the sending end device continues to send the second-level SCI to the receiving end device, on the one hand, it will cause a waste of time-frequency resources for sending the second-level SCI, and on the other hand, it will also make the spectrum efficiency of the sideline communication system The reduction.
  • the receiving end device obtains part of the PSSCH transmission configuration information through the configure grant, that is, through the RRC signaling of the Uu air interface or the RRC signaling of the PC-5 air interface, then The sending end device does not need to send the second level SCI to instruct the receiving end device to decode the PSSCH sent by the sending end device.
  • the second level of SCI is also redundant.
  • the present application provides a method for sending side-line control information, aiming to remove two-level SCI from side-line communication.
  • the sender device informs the receiver device that the sender device does not send the second-level SCI to the receiver device, so that the resources used to send the second-level SCI are used for other purposes, such as , Used for data transmission, which can avoid waste of resources, and can also improve the spectrum efficiency of the side-line communication system.
  • the first terminal device appearing below may be the sending end device in sideline communication, or may be a circuit system installed in the sending end device, such as a chip or an integrated circuit.
  • the second terminal device may be a receiving end device in sideline communication, or a circuit system installed in the receiving end device, for example, a chip or an integrated circuit.
  • the chip mentioned here may be a system on chip (SoC), a baseband chip, and the like.
  • SoC system on chip
  • baseband chip a baseband chip
  • FIG. 2 is a flowchart of a method 200 for sending side control information provided by this application.
  • the first terminal device sends the first-level SCI to the second terminal device.
  • the first level of SCI can also be referred to as the first side line control information.
  • the first terminal device may also be referred to as a transmitting end device or a transmitting end device
  • the second terminal device may also be referred to as a receiving end device or a receiving end device.
  • the first-level SCI includes first indication information, and the first indication information is used to indicate whether the first terminal device sends the second-level SCI to the second terminal device.
  • the second-level SCI may also be referred to as second side-line control information.
  • the first indication information specifically indicates that the first terminal device does not send the second-level SCI to the second terminal device.
  • the first indication information specifically instructs the first terminal device to send the second-level SCI to the second terminal device.
  • the second terminal device receives the first level SCI from the first terminal device.
  • first-level SCI and the second-level SCI can refer to the above description, which will not be repeated here.
  • the first terminal device executes step 220. If the first indication information specifically instructs the first terminal device to send the second-level SCI to the second terminal device, the first terminal device executes step 230.
  • the first terminal device transmits the PSSCH to the second terminal device according to the first-level SCI.
  • step 210 the first level SCI received by the second terminal device.
  • the second terminal device receives the second level SCI according to the first level SCI.
  • the PSSCH of the terminal device is in step 240 below.
  • the first terminal device sends the second-level SCI to the second terminal device according to the first-level SCI and the second-level SCI.
  • step 210 the first level SCI received by the second terminal device.
  • the first indication information specifically instructs the first terminal device to send the second level SCI to the second terminal device, then the second terminal device according to the first level SCI and the second level SCI, To receive the PSSCH from the first terminal device, follow steps 250-270 as follows.
  • the first terminal device can indicate to the second terminal device whether the first terminal device sends the second terminal device to the second terminal device through the first level SCI.
  • the first terminal device instructs the first terminal device not to send the second-level SCI to the second terminal device through the first indication information included in the first-level SCI, it indicates that the PSSCH is only scheduled by the side-line control information included in the first-level SCI.
  • the first terminal device transmits the PSSCH to the second terminal device according to the first-level SCI.
  • the second terminal device receives the first-level SCI from the first terminal device, and according to the first indication information contained in the first-level SCI, it can be learned that the first terminal device does not send the second-level SCI to the second terminal device. Therefore, the second terminal device receives the PSSCH from the first terminal device based on the received side control information included in the first stage SCI.
  • the first terminal device instructs the first terminal device to send the second-level SCI to the second terminal device through the first indication information contained in the first-level SCI, it indicates that the PSSCH is controlled by the sideline contained in the first-level SCI and the second-level SCI Information scheduling.
  • the first terminal device also needs to send the second level SCI to the second terminal device.
  • the first terminal device transmits the PSSCH to the second terminal device based on the first-level SCI and the second-level SCI.
  • the second terminal device receives the first-level SCI from the first terminal device, and according to the first indication information contained in the first-level SCI, it can be learned that the first terminal device sends the second-level SCI to the second terminal device, indicating the first-level SCI
  • a terminal device uses a two-level SCI to schedule the PSSCH. Therefore, the second terminal device also needs to receive the second level SCI from the first terminal device. According to the first level SCI and the second level SCI, the second terminal device receives the PSSCH from the first terminal device.
  • the first terminal device in side-line communication, can flexibly according to the communication requirements, for example, whether to schedule the PSSCH through the two-level SCI, or to schedule the PSSCH through the first-level SCI, indicating whether the second terminal device is Sending the second-level SCI can avoid the waste of resources caused by the unified use of the two-level SCI in any side-line communication scenario, or in other words, can improve the efficiency of resource utilization.
  • the spectrum efficiency of the system can also be provided.
  • the first level of SCI includes an AL field, the AL field has at least two valid values, and the first valid value of the at least two valid values is used to instruct the first terminal device not to send the second terminal device to the second terminal device.
  • Level 2 SCI where the first valid value is 0.
  • the first-level SCI contains the AL field, and the AL field is used to indicate the AL of the second-level SCI.
  • the AL of the second-level SCI can indicate how many basic resource units used to transmit the second-level SCI are aggregated from the resource units of the second-level SCI.
  • the basic resource unit of the second-level SCI may be a common 2 nd- stage sidelink control element (CSCE), which is a collection of several consecutive resource elements (resource elements, RE), Or it includes a collection of several resource blocks (RB).
  • CSCE 2 nd- stage sidelink control element
  • RE resource elements
  • RB resource blocks
  • the basic resource unit of the second-level SCI may be 6 consecutive RBs for decoding the DMRS resources of the second-level CSI. This application does not limit the size of the basic resource unit.
  • the AL field of the first-level SCI can be used to indicate the number of CSCEs included in the second-level SCI, or the AL field can also be used to indicate the number of RBs or REs included in the second-level SCI, etc.
  • one CSCE may be a set of several consecutive REs, or a set of several RBs.
  • the starting position of the time-frequency resource of the second-level SCI is known, for example, it can be obtained from the position of the first-level SCI time-frequency resource according to the specified correspondence, This application is not limited. Further, through the indication information of the AL field, the sending end device can indicate the resource scheduling information of the second level SCI.
  • the AL field may include N bits, where N is a positive integer.
  • the transmitting end device sends the first level SCI and the second level SCI to the receiving end device, or in other words, the second level SCI must exist. Therefore, the aggregation level AL of the second-level SCI is usually equal to or greater than 1.
  • the AL field when the AL field contains 3 bits, the AL field has a total of 16 valid values from 000 to 111 (that is, 0 to 15 in decimal), which can be represented by indexes 0 to 15 respectively.
  • the AL field when the AL field contains 2 bits, the AL field has a total of 4 valid values from 00 to 11 (that is, 0 to 3 in decimal), which can be represented by indexes 0 to 3 respectively.
  • the first valid value "0" is the decimal representation of the valid value of the AL field.
  • each valid value of the AL field uniquely corresponds to an index. Therefore, the mapping relationship between the index corresponding to the valid value of the AL field of the first level SCI and the AL of the second level SCI can be as shown in Table 1.
  • the AL field has at least two valid values, and the valid value "0" of the at least two valid values is used to indicate that the first terminal device does not report to the second terminal device. Send the second level of SCI.
  • the effective value "0" is the first effective value referred to herein.
  • the first terminal device and the second terminal device may each store the mapping relationship shown in Table 1.
  • the second terminal device determines whether the first terminal device sends the second-level SCI according to the index carried in the AL field of the received first-level SCI.
  • the AL field of the first level SCI carries the index 0 (that is, the first valid value)
  • the second terminal device receives the corresponding PSSCH according to the correctly decoded first-level SCI, as in step 240.
  • the second terminal device receives the corresponding PSSCH according to the correctly decoded first-level SCI.
  • the corresponding PSSCH in step 240 refers to the PSSCH scheduled by the first-level SCI.
  • the AL field of the first-level SCI carries indexes other than 0 (that is, other valid values other than the first valid value), it means that the first terminal device sends the second-level SCI to the second terminal.
  • the second terminal device may further perform steps 250-270.
  • the second terminal device determines the AL of the second-level SCI according to the AL field of the first-level SCI.
  • the second terminal device can determine the value of the AL corresponding to the other valid values.
  • the second terminal device receives the second-level SCI from the first terminal device according to the determined AL of the second-level SCI.
  • the first terminal device For the first terminal device, if the AL field of the first-level SCI instructs the first terminal device to send the second-level SCI to the second terminal device, the first terminal device sends the first-level SCI to the second terminal. The device sends the second level of SCI. The second terminal device receives the second-level SCI according to the value of the AL indicated by the AL field of the first-level SCI.
  • the second terminal device receives the corresponding PSSCH according to the first-level SCI and the second-level SCI.
  • the second terminal device receives the corresponding PSSCH according to the correctly decoded first-level SCI and second-level SCI.
  • the "corresponding PSSCH" refers to the PSSCH co-scheduled by the first-level SCI and the second-level SCI.
  • step 230 and step 260 may be that the first terminal device transmits the PSSCH first and then the second level SCI, or the first terminal device first transmits the second level SCI and then the PSSCH, or alternatively, PSSCH and The second level SCI can also be sent at the same time.
  • the receiving end device does not have a sequential relationship for the receiving order of the second-level SCI and PSSCH. Therefore, the numbering of the steps shown in FIG. 2 should not limit the solution of this application.
  • the method 200 shown in FIG. 2 includes step 210, step 220, and step 240.
  • the method 200 includes step 210, step 230, and steps 250-270.
  • the first indication information is additionally added to the first level SCI, and the first indication information is used to indicate whether the first terminal device sends the second level SCI to the second terminal device.
  • the first level SCI contains both the AL field and the first indication information.
  • the first indication information may include 1 bit, which is used to indicate whether the first terminal device sends the second-level SCI to the second terminal device.
  • the first indication information includes two valid values, namely "0" and "1". Among them, 0 indicates that the first terminal device does not send the second-level SCI to the second terminal device, and 1 indicates that the first terminal device sends the second-level SCI to the second terminal device.
  • the value of the AL of the second-level SCI may be indicated by the AL field of the first-level SCI.
  • the AL of the second-level SCI indicated by the AL field of the first-level SCI is not 0.
  • the first indication information includes two valid values, one valid value is used to indicate that the first terminal device does not send the second-level SCI to the second terminal device, and the other valid value is used to indicate the first The terminal device transmits the second level SCI to the second terminal device.
  • the second terminal device can determine whether the first terminal device sends the second-level SCI according to the effective value of the first indication information.
  • the second terminal device executes step 230.
  • the first indication information instructs the first terminal device to send the second-level SCI
  • the second terminal device executes steps 250-270, refer to the above description, and will not be repeated here.
  • the first terminal device instructs the second terminal device whether the first terminal device sends the second-level SCI to the second terminal device by carrying the first indication information in the first-level SCI.
  • Fig. 3 is a flowchart of a method 300 for sending side control information provided by this application.
  • the first terminal device sends the first-level SCI to the second terminal device.
  • the cyclic redundancy check bit corresponding to the first-level SCI is scrambled by scrambling information.
  • the scrambling information includes a first identifier or a second identifier
  • the first identifier is used to indicate that the first terminal device does not send the second-level SCI to the second terminal device
  • the second identifier is used to indicate that the first terminal device sends the second terminal device to the second terminal device. The device sends the second level of SCI.
  • the cyclic redundancy check bit corresponding to the first-level SCI is scrambled by the first identifier.
  • the cyclic redundancy check bit corresponding to the first-level SCI is scrambled by the second identifier.
  • the first terminal device If the cyclic redundancy check (CRC) corresponding to the first-level SCI is scrambled by the first identifier, it means that the first terminal device does not send the second-level SCI to the second terminal device, and the first terminal device executes step 320 .
  • CRC cyclic redundancy check
  • the first terminal device sends the second-level SCI to the second terminal device, and the first terminal device also sends the second-level SCI to the second terminal device and executes Step 330.
  • the second terminal device receives the first-stage SCI from the first terminal device, and descrambles the CRC of the first-stage SCI.
  • the second terminal device uses the first identifier to successfully descramble the CRC of the first-level SCI, it means that the first terminal device does not send the second-level SCI to the second terminal device. If the second terminal device uses the second identifier to successfully descramble the CRC of the first level SCI, it means that the first terminal device sends the second level SCI to the second terminal device.
  • the first terminal device transmits the PSSCH to the second terminal device according to the first-level SCI.
  • step 310 the first level SCI received by the second terminal device. According to the descrambling of the CRC of the first level SCI, it can be known whether the first terminal device sends the second level SCI to the second terminal device.
  • the second terminal device When the second terminal device successfully descrambles the CRC of the first level SCI using the first identifier, the second terminal device receives the PSSCH from the first terminal device according to the first level SCI.
  • the first terminal device sends the second-level SCI to the second terminal device according to the first-level SCI and the second-level SCI.
  • the second terminal device When the second terminal device successfully descrambles the CRC of the first-level SCI using the second identifier, it means that the first terminal device sends the second-level SCI to the second terminal device. In this case, the second terminal device further receives the second-level SCI from the first terminal device according to the AL of the second-level SCI indicated by the AL field of the first-level SCI. Finally, according to the first level SCI and the second level SCI, the PSSCH is received from the first terminal device.
  • the function of the first identifier and the second identifier of the method 300 is to implicitly indicate to the second terminal device whether the first terminal device sends the second-level SCI. Therefore, it is only necessary to define that the first identifier and the second identifier are different, and the specific structure of the first identifier and the second identifier is not concerned with the solution of this application.
  • the first terminal device can scramble the CRC of the first level SCI by using a different identifier to implicitly indicate to the second terminal device whether the first terminal device sends the second terminal device to the second terminal device.
  • Grade SCI the first terminal device can scramble the CRC of the first level SCI by using a different identifier to implicitly indicate to the second terminal device whether the first terminal device sends the second terminal device to the second terminal device.
  • the first terminal device can indicate to the second terminal device whether the first terminal device sends the second-level SCI without changing the structure of the first-level SCI, without incurring the overhead of signaling or indicating resources. .
  • FIG. 4 is a flowchart of a method 400 for sending side control information provided by this application.
  • the first terminal device sends the first-level SCI to the second terminal device.
  • the first terminal device sends a reference signal to the second terminal device.
  • the reference signal includes a first reference signal or a second reference signal.
  • the first reference signal is used to instruct the first terminal device not to send the second-level SCI to the second terminal device
  • the second reference signal is used to instruct the first terminal device to send the second-level SCI to the second terminal device.
  • the reference signal may be a DMRS.
  • the first reference signal may be a first DMRS
  • the second reference signal may be a second DMRS.
  • step 420 the reference signal sent by the first terminal device to the second terminal device is used by the second terminal device to estimate the channel to decode the PSCCH carrying the first level of SCI.
  • the first terminal device sends the first reference signal to the second terminal device for channel estimation.
  • the first terminal device sends the second reference signal to the second terminal device for channel estimation.
  • the first terminal device sends the first reference signal to the second terminal device, it means that the first terminal device does not send the second-level SCI to the second terminal device, and the first terminal device executes step 430.
  • the first terminal device sends the second reference signal to the second terminal device, it means that the first terminal device sends the second-level SCI to the second terminal device, and the first terminal device executes step 440.
  • the second terminal device detects the reference signal from the first terminal device. If the second terminal device detects the first reference signal, the second terminal device learns that the first terminal device does not send the second level SCI.
  • the second terminal device learns that the first terminal device sends the second level SCI.
  • the first terminal device sends the PSSCH to the second terminal device according to the first-level SCI.
  • the second terminal device detects the first reference signal sent by the first terminal device, and can learn that the first terminal device does not send the second-level SCI to the second terminal device. Therefore, the second terminal device receives the PSSCH from the first terminal device according to the first level SCI.
  • the first terminal device sends the second-level SCI to the second terminal device according to the first-level SCI and the second-level SCI.
  • the second terminal device detects the second reference signal sent by the first terminal device, and can learn that the first terminal device sends the second-level SCI to the second terminal device.
  • the second terminal device further receives the second-level SCI from the first terminal device according to the AL of the second-level SCI indicated by the AL field of the first-level SCI.
  • the PSSCH is received from the first terminal device.
  • the functions of the first reference signal and the second reference signal of the method 400 are to implicitly indicate to the second terminal device whether the first terminal device sends the second-level SCI. Therefore, it is only necessary to define that the first reference signal and the second reference signal are different, and the mapping pattern of the first reference signal and the second reference signal is not concerned with the solution of this application.
  • the first terminal device uses different reference signals for the second terminal device to perform channel estimation to decode the PSCCH carrying the first-level SCI, which can implicitly indicate to the second terminal device whether the first terminal device Send the second level SCI to the second terminal device.
  • the first terminal device can indicate to the second terminal device whether the first terminal device sends the second-level SCI without changing the structure of the first-level SCI, without incurring the overhead of signaling or indicating resources. .
  • the sender device that is, the first terminal device of the side-line communication can pass the first-level SCI or the scrambling information of the CRC of the first SCI, Or the reference signal used for channel estimation to decode the PSCCH carrying the first-level SCI, to indicate to the receiving end device (that is, the second terminal device) whether the first terminal device transmits the second-level SCI, so that it can be based on the side line
  • two-level SCI or one-level SCI can be flexibly selected to avoid waste of resources due to the use of two-level SCI in any scenario of side-line communication, and at the same time can improve the spectrum efficiency of the side-line communication system.
  • all side-line scheduling information used by the first terminal device to schedule side-line broadcast data can be indicated by the first-level SCI, and the first terminal device does not need to send the second-level SCI to the second terminal device.
  • the sending end device sends a radio resource control (RRC) message to the receiving end device.
  • RRC radio resource control
  • the RRC message carries a configured grant, and the information that needs to be indicated by the second-level SCI can be carried. In the configuration permission. Therefore, the first terminal device does not need to send the second level SCI to the second terminal device.
  • Mode 2 The mode in which the terminal device independently selects the resource
  • the information that needs to be indicated by the second-level SCI can be carried in a pre-configured sidelink grant (SG) or time frequency resource pattern (TFRP).
  • SG sidelink grant
  • TFRP time frequency resource pattern
  • Both the sending end device and the receiving end device know the pre-configured SG and TFRP. Therefore, the receiving device can determine which SG and TFRP is used by the transmitting device through sensing and measurement. Therefore, the first terminal device does not need to send the second level SCI to the second terminal device.
  • FIG. 5 is a schematic block diagram of a terminal device 1000 provided by this application. As shown in FIG. 5, the terminal device 1000 includes a transceiving unit 1100 and a processing unit 1200.
  • the terminal device 1000 instructs the terminal device 1000 whether to send the second-level SCI to the second terminal device through the first indication information carried in the first-level SCI.
  • the functions of the transceiver unit 1100 and the processing unit 1200 are as follows:
  • the transceiving unit 1100 is configured to send first-level side line control information SCI to a second terminal device, where the first-level SCI includes first indication information, and the first indication information is used to indicate whether the terminal device reports to the The second terminal device sends the second-level side line control information SCI;
  • the processing unit 1200 is configured to control the transceiver unit 1200 to send the PSSCH to the second terminal device according to the first-level SCI, wherein the first indication information indicates that the terminal device does not send the second terminal device to the second terminal device.
  • Secondary side line control information SCI or,
  • the processing unit 1200 is configured to control the transceiver unit 1200 to send a PSSCH to the second terminal device according to the first level SCI and the second level SCI, where the first indication information indicates that the terminal device does not send a PSSCH to the second terminal device.
  • the second terminal device sends second-level side-line control information SCI.
  • the transceiving unit 1100 may also be replaced by a sending unit or a receiving unit.
  • the transceiving unit 1100 when the transceiving unit 1100 performs a sending action, it can be replaced by a sending unit.
  • the transceiver unit 1100 When the transceiver unit 1100 performs a receiving action, it can be replaced by a receiving unit.
  • the first indication information is used to indicate whether the first terminal device sends second-level side control information SCI to the second terminal device, including:
  • the first level SCI includes an aggregation level AL field, the AL field has at least two valid values, the at least two valid values include a first valid value, and the first valid value is 0, 0 For instructing the first terminal device not to send the second level SCI to the second terminal device; and,
  • other valid values other than the first valid value are used to instruct the first terminal device to send the second-level SCI to the second terminal device, and any One of the other valid values is specifically used to indicate the aggregation level of the second-level SCI.
  • the first indication information is used to indicate whether the first terminal device sends second-level side control information SCI to the second terminal device, including:
  • the first indication information has at least two valid values, and the first valid value of the at least two valid values is used to instruct the first terminal device not to send the first terminal device to the second terminal device.
  • Level 2 SCI
  • the second valid value of the at least two valid values is used to instruct the first terminal device to send the second level SCI to the second terminal device, and the first level SCI further includes aggregation Level AL field, the effective value of the AL field is used to indicate the aggregation level of the second level SCI.
  • the first indication information indicates that the terminal device does not send the second-level sideline control information SCI to the second terminal device, and the processing unit 1200 is based on the first The level SCI controls the transceiver unit 1100 to send the PSSCH to the second terminal device, where the transmission type of the PSSCH is broadcast.
  • the terminal device 1000 uses the scrambling information of the first-level SCI to indicate whether the terminal device 1000 sends the second-level SCI to the second terminal device.
  • the functions of the transceiver unit 1100 and the processing unit 1200 are as follows:
  • the transceiver unit 1100 is configured to send a first-level SCI to a second terminal device.
  • the cyclic redundancy check bit of the first SCI is scrambled by scrambling information, where the scrambling information includes a first identifier or a first
  • the second identifier the first identifier is used to indicate that the first terminal device does not send the second-level SCI to the second terminal device, and the second identifier is used to indicate that the first terminal device sends the second-level SCI to the second terminal device.
  • the terminal device sends the second level SCI;
  • the processing unit 1200 is configured to control the transceiver unit 1100 to send the physical side shared channel PSSCH to the second terminal device according to the first level SCI, where the scrambling information includes the first identifier; or,
  • the processing unit 1200 is configured to control the transceiver unit 1100 to send the physical side line shared channel PSSCH to the second terminal device according to the first level SCI and the second level SCI, where the scrambling information includes the second Logo.
  • the terminal device 1000 instructs the terminal device 1000 whether to send the second-level SCI to the second terminal device through a reference signal for decoding the first-level SCI.
  • the functions of the transceiver unit 1100 and the processing unit 1200 are as follows:
  • the transceiver unit 1100 is configured to send a reference signal to the second terminal device, where the reference signal includes a first reference signal or a second reference signal, where the first reference signal is used to instruct the terminal device not to send a reference signal to the terminal device.
  • the second terminal device sends a second-level SCI, and the second reference signal is used to instruct the terminal device to send the second-level SCI to the second terminal device;
  • the processing unit 1200 is configured to control the transceiver unit 1100 to send the physical side line shared channel PSSCH to the second terminal device according to the first level SCI, where the reference signal includes the first reference signal; or,
  • the processing unit 1200 is configured to control the transceiver unit 1100 to send the PSSCH to the second terminal device according to the first level SCI and the second level SCI, where the reference signal includes a second reference signal.
  • the reference signal may be a DMRS.
  • the first reference signal may be a first DMRS
  • the second reference signal may be a second DMRS.
  • the terminal device 1000 may be a sender device in side-line communication, for example, a terminal device or a combination device or component in the terminal device that can realize the function of the above-mentioned first terminal device.
  • the transceiving unit 1100 may be a transceiver.
  • the transceiver can be replaced by a receiver or transmitter.
  • the processing unit 1200 may be a processing device or a processor.
  • the terminal device 1000 may be a circuit system installed in the transmitting end device, for example, a chip or a system on chip (system on chip, SoC), etc.
  • the transceiver unit 1100 may be a communication interface.
  • the transceiver unit 1100 may be an input/output interface or an input/output circuit.
  • the input and output interface may include an input interface and an output interface.
  • the input and output circuit may include an input circuit and an output circuit.
  • the processing unit 1200 may be a processing device or a processor.
  • the function of the processing device can be realized by hardware, or by hardware executing corresponding software.
  • the processing device may include one or more memories and one or more processors, where the one or more memories are used to store a computer program, and the one or more processors read and execute the one or more The computer programs stored in multiple memories enable the terminal device 1000 to perform operations and/or processing performed by the first terminal device in each method embodiment.
  • the processing device may only include a processor, and the memory for storing the computer program is located outside the processing device.
  • the processor is connected to the memory through a circuit/wire to read and execute the computer program stored in the memory.
  • the transceiving unit 1100 may be a radio frequency device
  • the processing unit 1200 may be a baseband device.
  • FIG. 6 is a schematic block diagram of a terminal device 2000 provided by this application. As shown in FIG. 6, the terminal device includes a transceiver unit 2100 and a processing unit 2200.
  • the sender device of the side-line communication (for example, the first terminal device in this article) indicates whether the first terminal device is the receiver of the side-line communication through the first indication information carried by the first-level SCI.
  • the device sends the second level of SCI.
  • the functions of the transceiver unit 2100 and the processing unit 2200 are as follows:
  • the transceiver unit 2100 is configured to receive a first-level SCI from a first terminal device, where the first-level SCI includes first indication information, and the first indication information is used to indicate whether the first terminal device reports to the terminal
  • the device sends the second level SCI;
  • the processing unit 2200 is configured to control the transceiver unit 2100 to receive the PSSCH from the first terminal device according to the first-level SCI, wherein the first indication information indicates that the first terminal device does not report the PSSCH to the terminal device. Send the second level SCI; or,
  • the processing unit 2200 is configured to control the transceiver unit 2100 to receive the PSSCH from the first terminal device according to the first level SCI and the second level SCI, where the first indication information indicates the first terminal
  • the device sends the second level SCI to the second terminal device.
  • the transceiving unit 2100 may also be replaced by a sending unit or a receiving unit.
  • the transceiver unit 2100 when the transceiver unit 2100 performs a sending action, it can be replaced by a sending unit.
  • the transceiver unit 2100 when the transceiver unit 2100 performs a receiving action, it can be replaced by a receiving unit.
  • the first indication information is used to indicate whether the first terminal device sends second-level side control information SCI to the second terminal device, including:
  • the first level SCI includes an aggregation level AL field, the AL field has at least two valid values, the at least two valid values include a first valid value, and the first valid value is 0, 0 For instructing the first terminal device not to send the second level SCI to the second terminal device; and,
  • other valid values other than the first valid value are used to instruct the first terminal device to send the second-level SCI to the second terminal device, and any One of the other valid values is specifically used to indicate the aggregation level of the second-level SCI.
  • the first indication information is used to indicate whether the first terminal device sends second-level side control information SCI to the second terminal device, including:
  • the first indication information has at least two valid values, and the first valid value of the at least two valid values is used to instruct the first terminal device not to send the first terminal device to the second terminal device.
  • Level 2 SCI
  • the second valid value of the at least two valid values is used to instruct the first terminal device to send the second level SCI to the second terminal device, and the first level SCI further includes aggregation Level AL field, the effective value of the AL field is used to indicate the aggregation level of the second level SCI.
  • the first terminal device instructs the first terminal device whether to send the second-level SCI to the terminal device through the scrambling information of the first-level SCI.
  • the functions of the transceiver unit 2100 and the processing unit 2200 of the terminal device 2000 are as follows:
  • the transceiver unit 2100 is configured to receive a first-level SCI from a first terminal device.
  • the cyclic redundancy check bit of the first-level SCI is scrambled by scrambling information, where the scrambling information includes a first identifier or A second identifier, the first identifier is used to indicate that the first terminal device does not send a second-level SCI to the second terminal device, and the second identifier is used to indicate that the first terminal device sends a second-level SCI to the second terminal device.
  • Two terminal devices send the second level SCI;
  • the processing unit 2200 is configured to control the transceiver unit 2100 to receive the PSSCH from the first terminal device according to the first-level SCI, where the scrambling information includes a first identifier; or,
  • the processing unit 2200 is configured to control the transceiver unit 2100 to receive the PSSCH from the first terminal device according to the first-level SCI and the second-level SCI, where the scrambling information includes a second identifier.
  • the first terminal device instructs the first terminal device whether to send the second-level SCI to the terminal device through a reference signal used to decode the first-level SCI.
  • the functions of the transceiver unit 1100 and the processing unit 1200 of the terminal device 2000 are as follows:
  • the transceiver unit 2100 is configured to receive the first-level side line control information SCI from the first terminal device;
  • the transceiving unit 2100 is further configured to detect reference information from the first terminal device, where the reference signal includes a first reference signal or a second reference signal, wherein the first reference signal is used to indicate the second reference signal A terminal device does not send a second-level SCI to the terminal device, and the second reference signal is used to instruct the first terminal device to send a second-level SCI to the terminal device;
  • the processing unit 2200 is configured to control the transceiver unit 2100 to receive the PSSCH from the first terminal device according to the first level SCI, where the reference signal includes a first reference signal; or,
  • the processing unit 2200 is configured to control the transceiver unit 2100 to receive the PSSCH from the first terminal device according to the first level SCI and the second level SCI, where the reference signal includes a second reference signal.
  • the terminal device 2000 may be a receiving end device in side-line communication, for example, a terminal device or a combination device or component in the terminal device that can realize the function of the above-mentioned second terminal device.
  • the transceiver unit 2100 may be a transceiver.
  • the transceiver can be replaced by a receiver or transmitter.
  • the processing unit 2200 may be a processing device or a processor.
  • the terminal device 2000 may be a circuit system installed in the receiving end device, such as a chip or an integrated circuit.
  • the transceiver unit 2100 may be a communication interface.
  • the transceiver unit 2100 may be an input/output interface or an input/output circuit.
  • the input and output interface may include an input interface and an output interface.
  • the input and output circuit may include an input circuit and an output circuit.
  • the processing unit 2200 may be a processing device.
  • the function of the processing device can be realized by hardware, or by hardware executing corresponding software.
  • the processing device may include one or more memories and one or more processors, where the one or more memories are used to store a computer program, and the one or more processors read and execute the one or more The computer programs stored in multiple memories enable the terminal device 2000 to perform operations and/or processing performed by the second terminal device in each method embodiment.
  • the processing device may only include a processor, and the memory for storing the computer program is located outside the processing device.
  • the processor is connected to the memory through a circuit/wire to read and execute the computer program stored in the memory.
  • the transceiver unit 2100 may be a radio frequency device
  • the processing unit 2200 may be a baseband device.
  • the terminal device 10 includes: one or more processors 11, one or more memories 12, and one or more communication interfaces 13.
  • the processor 11 is used to control the communication interface 13 to send and receive signals
  • the memory 12 is used to store a computer program
  • the processor 11 is used to call and run the computer program from the memory 12, so that the terminal device 10 executes each method implementation of this application. In this example, the processing and/or operation performed by the first terminal device.
  • the processor 11 may have the function of the processing unit 1200 shown in FIG. 5, and the communication interface 13 may have the function of the transceiving unit 1100 shown in FIG.
  • the processor 11 may have the function of the processing unit 1200 shown in FIG. 5
  • the communication interface 13 may have the function of the transceiving unit 1100 shown in FIG.
  • the processor 11 may be a baseband device installed in the transmitting end device, and the communication interface 13 may be a radio frequency device.
  • FIG. 8 is a schematic structural diagram of a terminal device 20 provided in the present application.
  • the terminal device 20 includes: one or more processors 21, one or more memories 22, and one or more communication interfaces 23.
  • the processor 21 is used to control the communication interface 23 to send and receive signals
  • the memory 22 is used to store computer programs
  • the processor 21 is used to call and run the computer programs from the memory 22, so that the terminal device 20 executes the various method embodiments of the present application.
  • the processing and/or operation performed by the second terminal device is performed by the second terminal device.
  • the processor 21 may have the function of the processing unit 2200 shown in FIG. 6, and the communication interface 23 may have the function of the transceiving unit 2100 shown in FIG. 6.
  • the processor 21 may have the function of the processing unit 2200 shown in FIG. 6, and the communication interface 23 may have the function of the transceiving unit 2100 shown in FIG. 6.
  • the memory and the memory in the foregoing device embodiments may be physically independent units, or the memory may also be integrated with the processor.
  • this application also provides a computer-readable storage medium.
  • the computer-readable storage medium stores computer instructions.
  • the computer instructions run on the computer, the computer executes the method for sending side-line control information provided by this application. Operations and/or processing performed by the first terminal device.
  • This application also provides a computer-readable storage medium.
  • the computer-readable storage medium stores computer instructions.
  • the computer instructions run on the computer, the computer executes the method for sending side-line control information provided by this application. Operations and/or processing performed by the terminal device.
  • This application also provides a computer program product.
  • the computer program product includes computer program code.
  • the computer program code runs on a computer, the computer executes the method for sending side-line control information provided by this application, which is executed by the first terminal device. Operation and/or processing.
  • This application also provides a computer program product.
  • the computer program product includes computer program code.
  • the computer program code runs on a computer, the computer executes the method for sending side-line control information provided by this application, which is executed by the second terminal device. Operation and/or processing.
  • the present application also provides a terminal device, including a processor and an interface circuit, the interface circuit is used to receive computer code or instructions, and transmit to the processor, the processor is used to run the computer code or instructions to Perform operations and/or processing performed by the first terminal device in the method for sending side control information provided by this application.
  • the present application also provides a terminal device, including a processor and an interface circuit, the interface circuit is used to receive computer code or instructions, and transmit to the processor, the processor is used to run the computer code or instructions to Perform operations and/or processing performed by the second terminal device in the method for sending side line control information provided by the present application.
  • the application also provides a chip including one or more processors.
  • the one or more processors are used to execute a computer program stored in the memory to execute operations and/or processing performed by the first terminal device in any method embodiment.
  • the memory for storing the computer program is provided independently of the chip.
  • the chip may also include one or more communication interfaces.
  • the one or more communication interfaces may be input/output interfaces, input/output circuits, and the like.
  • the chip may also include one or more of the memories.
  • the application also provides a chip including one or more processors.
  • the one or more processors are used to execute the computer program stored in the memory to execute the operation and/or processing executed by the second terminal device in any method embodiment.
  • the memory for storing the computer program is provided independently of the chip.
  • the chip may also include one or more communication interfaces.
  • the one or more communication interfaces may be input/output interfaces, input/output circuits, and the like.
  • the chip may also include one or more of the memories.
  • the present application also provides a side-line communication system, including the first terminal device and/or the second terminal device in the embodiment of the present application.
  • the lateral communication system may also include access network equipment and/or core network equipment.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has the ability to process signals.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the processor can be a general-purpose processor, digital signal processor (digital signal processor, DSP), application specific integrated circuit (ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic Devices, discrete gates or transistor logic devices, discrete hardware components.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • 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 encoding processor, or executed and completed by a combination of hardware and software modules in the encoding processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrical Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory direct rambus RAM, DRRAM
  • direct rambus RAM direct rambus RAM
  • unit used in this specification are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution.
  • the component may be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program, and/or a computer running on a processor.
  • the application running on the computing device and the computing device can be components.
  • One or more components may reside in a process and/or thread of execution.
  • the components may be located on one computer and/or distributed between two or more computers.
  • these components can be executed from various computer readable media having various data structures stored thereon.
  • a component can be based on data that has one or more data packets (for example, data from two components that interact with another component in a local system, a distributed system, and/or a network, for example, the Internet that interacts with other systems through signals) Signals are communicated through local and/or remote processes.
  • data packets for example, data from two components that interact with another component in a local system, a distributed system, and/or a network, for example, the Internet that interacts with other systems through signals
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请提供了一种发送和接收侧行控制信息的方法和终端装置以及系统,可以应用于车联网(例如,V2X、LTE-V或V2V等)、智能驾驶以及智能网联车等领域。在侧行通信系统中不需要第二级SCI的场景下,由侧行通信的发送端装置通过第一级SCI,或者第一级SCI的循环冗余校验位,或者用于解调第一级SCI的参考信号,指示发送端装置不向接收端装置发送第二级SCI。从而,发送端装置可以根据侧行通信的具体场景,灵活地选择采用两级SCI或者一级SCI。可以避免在侧行通信的任何场景下都一律采用两级SCI而导致的资源浪费,进而提高资源利用效率。

Description

发送和接收侧行控制信息的方法、终端装置和系统 技术领域
本申请涉及车联网领域,更具体地,涉及一种发送侧行控制信息的方法和终端装置,以及一种接收侧行控制信息的方法、终端装置和系统。
背景技术
车联网(vehicle to everything,V2X)通信是指车辆与外界任何事物的通信,例如车辆与车辆,车辆与行人的通信,车辆与基础设施的通信,车辆与网络的通信等。车辆用户设备(vehicle-user equipment,V-UE)能将自身的一些信息,例如,位置、速度、意图(转弯、并线或倒车等)等信息向周围的V-UE发送,同时,V-UE也会接收周围的V-UE的信息,完成V-UE之间的通信,也即侧行(sidelink)通信。
在终端设备和基站的下行传输中,基站向终端设备发送的下行控制信息(downlink control information,DCI)是通过物理下行控制信道(physical downlink control channel,PDCCH)承载的。PDCCH是以控制信道元素(control channel elements,CCE)为单位进行资源映射的。一个PDCCH由多少个CCE组成取决于PDCCH所承载的DCI的大小以及码率。其中,一个PDCCH所包含的CCE的个数被定义为聚合等级(aggregation level,AL)。终端设备通过以CCE为单位进行盲检(blind decode,BD)以解码PDCCH,进而获得DCI。
和下行通信类似,V2X通信也引入了物理侧行控制信道(physical sidelink control channel,PSCCH)和物理侧行共享信道(physical sidelink shared channel,PSSCH),其中,PSCCH用于承载侧行控制信息(sidelink control information,SCI),SCI用于调度PSSCH,从而使得V-UE之间可以进行侧行通信。
和DCI不同的是,鉴于侧行通信自身的特点,第三代合作伙伴计划(the 3rd generation partnership project,3GPP)标准组织提出,在V2X等侧行通信系统中采用两级SCI(即,2-stage SCI)的方案,即发送端设备生成第一级SCI,第一级SCI指示第二级SCI,第一级和第二级SCI共同组成完整的侧行控制信息。
但是,在侧行通信中,由于存在物理层单播、组播、广播以及多种不同的传输模式,例如,基于网络设备调度的模式、终端设备自主选择资源的模式等,两级SCI的方案可能并不适用于所有的情况。如果在所有情况下一律采用两级SCI,可能带来资源浪费。
发明内容
本申请提供一种发送和接收侧行控制信息的方法和终端装置,可以提高侧行通信中的资源利用效率。
第一方面,本申请提供一种发送侧行控制信息的方法,该方法包括:第一终端装置向第二终端装置发送第一级侧行控制信息SCI,所述第一级SCI包括第一指示信息,所述第 一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI;
所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送第二级侧行控制信息SCI,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送物理侧行共享信道PSSCH,或
所述第一指示信息指示所述第一终端装置向所述第二终端装置发送第二级侧行控制信息SCI,所述第一终端装置根据所述第一级SCI和所述第二级SCI向所述第二终端装置发送物理侧行共享信道PSSCH。
本申请提供的技术方案,在侧行通信系统中不需要第二级SCI的场景下,由侧行通信的发送端装置(也即,第一终端装置)通过第一级SCI,或者第一级SCI的循环冗余校验位,或者用于解调第一级SCI的参考信号,指示发送端装置不向接收端装置(也即,第二终端装置)发送第二级SCI。从而,根据侧行通信的具体场景,发送端装置可以灵活地选择采用两级SCI或者一级SCI。在发送端装置不发送第二级SCI的情况下,发送端装置可以将第二级SCI对应的资源用于数据传输等,可以避免在侧行通信的任何场景下都一律采用两级SCI而导致资源浪费。
此外,也可以提高侧行通信系统的频谱效率。
可替换地,侧行通信的发送端装置不向接收端装置发送第二级SCI,即表示第二级SCI是不存在的。或者说,侧行通信的发送端装置仅采用第一级SCI调度PSSCH。
结合第一方面,在第一方面的某些实现方式中,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
所述第一级SCI包括聚合等级AL字段,所述AL字段具有至少两个有效取值,所述至少两个有效取值包括第一有效取值,所述第一有效取值为0,0用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;以及,
所述至少两个有效取值中除了所述第一有效取值之外的其它有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,且任意一个所述其它有效取值具体用于指示所述第二级SCI的聚合等级。
考虑到现有的采用两级SCI的场景下,第一级SCI的AL字段所指示的第二级SCI的AL不包括AL=0的情况。因此,利用第一级SCI的AL字段的有效取值“0”表示第二级SCI的AL=0,隐含指示第一终端装置不向第二终端装置发送第二级SCI,不会增加信令或指示资源的开销。
结合第一方面,在第一方面的某些实现方式中,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
所述第一指示信息具有至少两个有效取值,所述至少两个有效取值中的第一有效取值用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;
所述至少两个有效取值中的第二有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,以及,所述第一级SCI还包括聚合等级AL字段,所述AL字段的有效取值用于指示所述第二级SCI的聚合等级。
在不需要第二级SCI的场景下,第一终端装置通过在第一级SCI中携带第一指示信息,以向第二终端装置指示第一终端装置不向第二终端装置发送第二级SCI,从而可以根据侧 行通信的场景,灵活地去除两级SCI的强制方案,避免资源浪费,同时也可以提高侧行通信系统的频谱效率。
结合第一方面,在第一方面的某些实现方式中,所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送第二级侧行控制信息SCI,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送物理侧行共享信道PSSCH,其中,所述PSSCH的传输类型为广播。
在不需要第二级SCI的场景下,例如,侧行广播传输,第一终端装置不向第二终端装置发送第二级SCI,从而将用于发送第二级SCI的资源用于其它的用途,例如,用于数据传输,从而可以避免资源浪费,同时也可以提高侧行通信系统的频谱效率。
第二方面,本申请提供一种发送侧行控制信息的方法,该方法包括:第一终端装置向第二终端装置发送第一级侧行控制信息SCI,所述第一SCI相对应的循环冗余校验位通过加扰信息进行加扰,其中,所述加扰信息包括第一标识或第二标识,所述第一标识用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二标识用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
所述加扰信息包括第一标识,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送物理侧行共享信道PSSCH,或
所述加扰信息包括第二标识,所述第一终端装置根据所述第一级SCI和所述第二级SCI向所述第二终端装置发送物理侧行共享信道PSSCH。
第一终端装置通过采用不同的标识对第一级SCI的CRC进行加扰,以向第二终端装置隐式指示第一终端装置是否向第二终端装置发送第二级SCI,可以在不改变第一级SCI的结构的情况下,实现第一终端装置向第二终端装置指示第一终端装置是否发送第二级SCI,不会带来信令或指示资源的开销。
结合第二方面,在第二方面的某些实现方式中,所述加扰信息包括第一标识,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送所述PSSCH,所述PSSCH的传输类型为广播。
第三方面,本申请提供一种发送侧行控制信息的方法,该方法包括:第一终端装置向第二终端装置发送第一级侧行控制信息SCI;
所述第一终端装置向所述第二终端装置发送参考信号,其中,所述参考信号包括第一参考信号或第二参考信号,其中,所述第一参考信号用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二参考信号用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
所述参考信号包括第一参考信号,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送物理侧行共享信道PSSCH;
所述参考信号包括第二参考信号,所述第一终端装置根据所述第一级SCI和所述第二级SCI向所述终端设备发送所述PSSCH。
第一终端装置通过不同的参考信号用于第二终端装置对承载第一级SCI的PSCCH进行信道估计,以解码第一级SCI,可以向第二终端装置隐式指示第一终端装置是否向第二终端装置发送第二级SCI,可以在不改变第一级SCI的结构的情况下,实现第一终端装置向第二终端装置指示第一终端装置是否发送第二级SCI,不会带来信令或指示资源的开销。
可选地,结合第三方面,在第三方面的某些实现方式中,所述参考信号包括所述第一参考信号,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送所述PSSCH,其中,所述PSSCH的传输类型为广播。
可选地,结合第三方面,在第三方面的某些实现方式中,所述参考信号包括用于解调承载所述第一级SCI的侧行物理控制信道PSCCH的解调参考信号DMRS,所述第一参考信号为第一DMRS,所述第二参考信号为第二DMRS。
采用现有的用于对承载第一级SCI的PSCCH进行信道估计的DMRS隐式指示第一终端装置是否向第二终端装置发送第二级SCI,不会带来信令或指示资源的开销。
需要说明的是,以下第四方面至第六方面的发送侧行控制信息的方法,是由侧行通信的接收端装置执行的方法,其各技术方案能够取得的有益技术效果,可以参考第一方面至第三方面的相应方案的说明,不再赘述。
第四方面,本申请提供一种接收侧行控制信息的方法,该方法包括:第二终端装置接收来自第一终端装置的第一级SCI,所述第一级SCI包括第一指示信息,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级SCI;
所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI,所述第二终端装置根据所述第一级SCI接收来自所述第一终端装置的物理侧行共享信道PSSCH;
所述第一指示信息指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,所述第二终端装置根据所述第一级SCI和所述第二级SCI,接收来自所述第一终端装置的PSSCH。
结合第三方面,在第三方面的某些实现方式中,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
所述第一级SCI包括聚合等级AL字段,所述AL字段具有至少两个有效取值,所述至少两个有效取值包括第一有效取值,所述第一有效取值为0,0用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;以及,
所述至少两个有效取值中除了所述第一有效取值之外的其它有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,且任意一个所述其它有效取值具体用于指示所述第二级SCI的聚合等级。
结合第三方面,在第三方面的某些实现方式中,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
所述第一指示信息具有至少两个有效取值,所述至少两个有效取值中的第一有效取值用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;
所述至少两个有效取值中的第二有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,以及,所述第一级SCI还包括聚合等级AL字段,所述AL字段的有效取值用于指示所述第二级SCI的聚合等级。
结合第四方面,在第四方面的某些实现方式中,所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二终端装置根据所述第一级SCI接收来自所述第一终端装置的PSSCH,其中,所述PSSCH的传输类型为广播。
第五方面,本申请提供一种接收侧行控制信息的方法,该方法包括:第二终端装置接 收来自第一终端装置的第一级侧行控制信息SCI,所述第一级SCI相对应的循环冗余校验位通过加扰信息加扰,其中,所述加扰信息包括第一标识或第二标识,所述第一标识用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二标识用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
所述加扰信息包括第一标识,所述第二终端装置根据所述第一级SCI接收来自所述第一终端装置的PSSCH;或者,
所述加扰信息包括第二标识,所述第二终端装置根据所述第一级SCI和所述第二级SCI,接收来自所述第一终端装置的PSSCH。
结合第五方面,在第五方面的某些实现方式中,所述加扰信息包括第一标识,所述第二终端装置根据所述第一级SCI接收来自所述第一终端装置的所述PSSCH,其中,所述PSSCH的传输类型为广播。
第六方面,本申请提供一种接收侧行控制信息的方法,该方法包括:第二终端装置接收来自第一终端装置的第一级侧行控制信息SCI;
所述第二终端装置检测来自所述第一终端装置的参考信号,其中,所述参考信号包括第一参考信号或第二参考信号,其中,所述第一参考信号用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二参考信号用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
所述参考信号包括所述第一参考信号,所述第二终端装置根据所述第一级SCI,接收来自所述第一终端装置的物理侧行共享信道PSSCH;或者,
所述参考信号包括所述第二参考信号,所述第二终端装置根据所述第一级SCI和所述第二级SCI,接收来自所述第一终端装置的PSSCH。
结合第六方面,在第六方面的某些实现方式中,所述参考信号包括所述第一参考信号,所述第二终端装置根据所述第一级SCI接收来自所述第二终端装置的所述PSSCH,所述PSSCH的传输类型为广播。
结合第六方面,在第六方面的某些实现方式中,所述参考信号包括用于解调承载所述第一级SCI的侧行物理控制信道PSCCH的解调参考信号DMRS,所述第一参考信号为第一DMRS,所述第二参考信号为第二DMRS。
第七方面,本申请提供一种终端装置,所述终端装置具有实现第一方面或其任意可能的实现方式中的方法的功能,或者,实现第二方面或其任意可能的实现方式中的方法的功能,或者,实现第三方面或其任意可能的实现方式中的方法的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第八方面,本申请提供一种终端装置,所述终端装置具有实现第四方面或其任意可能的实现方式中的方法的功能,或者,实现第五方面或其任意可能的实现方式中的方法的功能,或者,实现第六方面或其任意可能的实现方式中的方法的功能。所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第九方面,本申请提供一种终端设备,包括处理器、存储器和收发器。其中,存储器用于存储计算机程序,处理器用于调用并运行存储器中存储的计算机程序,并控制收发器 收发信号,以使得终端设备执行第一方面或其任意可能的实现方式中的方法,或者,执行第二方面或其任意可能的实现方式中的方法,或者,执行第三方面或其任意可能的实现方式中的方法。
第十方面,本申请提供一种终端设备,包括处理器、存储器和收发器。其中,存储器用于存储计算机程序,处理器用于调用并运行存储器中存储的计算机程序,并控制收发器收发信号,以使得终端设备执行第四方面或其任意可能的实现方式中的方法,或者,执行第五方面或其任意可能的实现方式中的方法,或者,执行第六方面或其任意可能的实现方式中的方法。
第十一方面,本申请提供一种计算机可读存储介质,所述计算机可读存储介质中存储有计算机指令,当计算机指令在计算机上运行时,使得计算机执行第一方面或其任意可能的实现方式中的方法,或者执行第二方面或其任意可能的实现方式中的方法,或者执行第三方面或其任意可能的实现方式中的方法。
第十二方面,本申请提供一种计算机可读存储介质,所述计算机可读存储介质中存储有计算机指令,当计算机指令在计算机上运行时,使得计算机执行第四方面或其任意可能的实现方式中的方法,或者执行第五方面或其任意可能的实现方式中的方法,或者执行第六方面或其任意可能的实现方式中的方法。
第十三方面,本申请提供一种计算机程序产品,所述计算机程序产品包括计算机程序代码,当所述计算机程序代码在计算机上运行时,使得计算机执行第一方面或其任意可能的实现方式中的方法,或者,执行第二方面或其任意可能的实现方式中的方法,或者,执行第三方面或其任意可能的实现方式中的方法。
第十四方面,本申请提供一种计算机程序产品,所述计算机程序产品包括计算机程序代码,当所述计算机程序代码在计算机上运行时,使得计算机执行第四方面或其任意可能的实现方式中的方法,或者,执行第五方面或其任意可能的实现方式中的方法,或者,执行第六方面或其任意可能的实现方式中的方法。
第十五方面,本申请提供一种终端装置,包括处理器和接口电路,所述接口电路用于接收计算机代码或指令,并传输至所述处理器,所述处理器用于运行所述计算机代码或指令,以执行第一方面或其任意可能的实现方式中的方法,或者,执行第二方面或其任意可能的实现方式中的方法,或者,执行第三方面或其任意可能的实现方式中的方法。
第十六方面,本申请提供一种终端装置,包括处理器和接口电路,所述接口电路用于接收计算机代码或指令,并传输至所述处理器,所述处理器用于运行所述计算机代码或指令,以执行第四方面或其任意可能的实现方式中的方法,或者,执行第五方面或其任意可能的实现方式中的方法,或者,执行第六方面或其任意可能的实现方式中的方法。
第十七方面,本申请提供一种侧行通信系统,包括如第九方面所述的终端设备和/或如第十方面所述的终端设备。
附图说明
图1是V2X通信场景的示意图。
图2为本申请提供的发送侧行控制信息的方法200的流程图。
图3为本申请提供的发送侧行控制信息的方法300的流程图。
图4为本申请提供的发送侧行控制信息的方法400的流程图。
图5为本申请提供的终端装置1000的示意性框图。
图6为本申请提供的终端装置2000的示意性框图。
图7是本申请提供的终端装置10的示意性结构图。
图8是本申请提供的终端装置20的示意性结构图。
具体实施方式
下面将结合附图,对本申请中的技术方案进行描述。
本申请的技术方案可以应用于车联网(vehicle-to-everything,V2X)、V2V、V2I、V2P、V2N、智能网联汽车(intelligent connected vehicle,ICV)、自动驾驶或辅助驾驶等通信系统等任何终端设备和终端设备(device to device,D2D)直接通信的网络中。此外,对于有网络覆盖和无网络覆盖的通信场景都是适用的。
参见图1,图1是V2X通信场景的示意图。在V2X通信中,车辆用户设备(vehicle-user equipment,V-UE)和车辆用户设备、行人用户设备和车辆用户设备、路边单元(roadside unit,RSU)设备之间的链路称为侧行链路(sidelink,SL),车辆用户设备和网络设备之间的链路称为下行链路(downlink,DL)或者上行链路(uplink,UL),其空口也称为Uu空口,相对应的DL通信和UL通信也称为Uu通信。
在V2X通信中,通信的双方都是终端设备。
本申请中提及的终端设备,也可以称为终端装置,包括但不限于为用户设备(user equipment,UE)、无线终端设备、移动终端设备、设备到设备通信(device-to-device,D2D)终端设备、V2X终端设备、机器类型通信(machine-type communications,M2M/MTC)终端设备、物联网(internet of things,IoT)终端设备、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如,可以包括移动电话(或称为“蜂窝”电话),具有移动终端设备的计算机,例如,便携式、袖珍式、手持式、计算机内置的移动装置等。又例如,个人通信业务(personal communication service,PCS)电话、无绳电话、会话发起协议(session initiation protocol,SIP)话机、无线本地环路(wireless local loop,WLL)站、个人数字助理(personal digital assistant,PDA)等设备。此外,终端设备还可以是车载通信模块或其它嵌入式通信模块。车载通信模块也可以称为车载终端设备或车载单元(on-board unit,OBU)。本申请实施例的终端设备还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载模组、车载部件、车载芯片或者车载单元。车辆通过内置的所述车载模块、车载模组、车载部件、车载芯片或者车载单元可以实施本申请的方法。
本申请中提及的网络设备,例如,包括接入网(access network,AN)设备,例如基站(例如,接入点),可以是指接入网中在空口通过一个或多个小区与无线终端设备通信的设备,或者例如,一种车到一切(vehicle-to-everything,V2X)技术中的网络设备为路侧单元(road side unit,RSU)。基站可用于将收到的空中帧与IP分组进行相互转换,作为终端设备与接入网的其余部分之间的路由器,其中接入网的其余部分可包括IP网络。RSU可以是支持V2X应用的固定基础设施实体,可以与支持V2X应用的其他实体交换消息。网络设备还可协调对空口的属性管理。例如,网络设备可以包括长期演进(long term  evolution,LTE)系统或高级长期演进(long term evolution-advanced,LTE-A)中的演进型基站(NodeB或eNB或e-NodeB,evolutional Node B),或者也可以包括第五代移动通信技术(the 5 th generation,5G)新空口(new radio,NR)系统(也简称为NR系统)中的下一代节点B(next generation node B,gNB)或者也可以包括云接入网(cloud radio access network,Cloud RAN)系统中的集中式单元(centralized unit,CU)和分布式单元(distributed unit,DU),本申请实施例并不限定。
当然网络设备还可以包括核心网设备,但因为本申请实施例提供的技术方案主要涉及的是接入网设备,因此在后文中,如无特殊说明,则所描述的“核心网设备”是指核心网设备,而所描述的“网络设备”或“接入网设备”均是指接入网设备。
下面对本申请涉及的两级SCI作简单介绍。
在侧行通信中,发送端设备发送侧行调度信息用于调度接收端设备接收数据信息,所述侧行调度信息即为SCI。根据3GPP提出的协议标准,在侧行通信系统的SCI可以分为两级,分别为第一级SCI(1 st-stage SCI)和第二级SCI(2 nd-stage SCI)。当然,SCI也可以包括超过两级的更多级的SCI。
其中,第一级SCI承载于物理侧行控制信道(physical sidelink control channel,PSCCH)。第一级SCI包含用于解码PSSCH的侧行控制信息。例如,第一级SCI可以包括如下字段的一个或多个:
所调度的物理侧行共享信道(physical sidelink shared channel,PSSCH)的优先级的字段,用于指示PSSCH的优先级信息,可以为3比特或者4比特长度;
所述PSSCH的时频资源的调度信息的字段,可以为8比特或9比特长度;
用于重传的PSSCH的资源预约信息字段,例如,不同重传的PSSCH的时间间隔,可以4比特或5比特长度);
用于PSSCH重传的序号字段,可以指示当前的PSSCH是几次重传,可以为2比特长度);
用于新传的PSSCH的资源预约信息字段,例如,用于周期性业务的资源预约,可以为4或5比特长度);
PSSCH的调制与编码策略(modulation and coding scheme,MCS)字段,可以为5比特长度);
PSSCH的解调参考信号(demodulation reference signal,DMRS)样式(pattern)的指示信息字段(可以为2或3比特长度);
第二级SCI的格式指示信息,可以指示第二级SCI所包含的内容是否包括发送端设备的位置信息、接收PSSCH的通信范围的要求信息等,即指示PSSCH的HARQ反馈方式是否是基于收发两端通信距离的只反馈NACK的方式,或者是反馈ACK和/或NACK的方式。间接地,也可以用来区分单播传输或有组建立和维护的组播传输,或是没有组建立和维护的组播传输,可以为1比特);以及,
资源池的标识(resource pool identity)字段,用于区分不同的资源池,可以为4比特或5比特长度,其中,资源池为用于侧行通信的发送端设备和接收端设备进行侧行通信的可用的时频资源的集合。
除此之外,第一级SCI还可以包括第二级SCI的资源指示信息字段,所述资源指示信 息字段例如可以为AL字段(可以为3或4比特长度),AL字段用于指示第二级SCI的AL,即,第二级SCI的资源由多少个用于传输第二级SCI的基本资源单元聚合而成。
其中,第二级SCI包括除了第一级SCI所包含的侧行控制信息之外的用于解码PSSCH所需的其它侧行控制信息。
例如,第二级SCI可以包括如下字段的一个或多个:
HARQ激活信息字段,即指示接收端设备是否需要在物理侧行反馈信道(physical sidelink feedback channel,PSFCH)向发送端设备反馈HARQ-ACK信息(例如,ACK或者NACK)。所述HARQ激活信息字段可以包含1比特信息,其中一个有效值,例如“1”,用于指示单播传输和/或组播传输。也即,不基于发送端设备-接收端设备传输距离反馈HARQ(Tx-Rx distance-based HARQ)的组播方式,即组播的接收端设备对发送端设备而言是已知的,接收端设备正确接收数据则反馈ACK,错误接收数据则反馈NACK。可推断地,HARQ激活信息字段的另一个有效值,例如“0”,则指示接收端设备不需要反馈HARQ信息。
如果第二级SCI存在接收PSSCH的通信范围的要求信息字段(用于基于发送端设备-接收端设备传输距离反馈HARQ(Tx-Rx distance-based HARQ)的组播方式),当接收PSSCH的通信范围的要求信息的数值为0时,表示基于发送端设备-接收端设备传输距离的组播方式的接收端设备不需要反馈HARQ信息;当接收PSSCH的通信范围的要求信息的数值大于0时,则需要反馈HARQ信息。
第一级SCI和第二级SCI共同组成完整的侧行控制信息,以指示接收端设备接收PSSCH。因此,侧行通信中数据传输的流程大致为:
发送端设备向接收端设备发送PSCCH,PSCCH上承载第一级SCI。
接收端设备根据来自发送端设备的DMRS对承载第一级SCI的PSCCH进行信道估计,以解码第一级SCI,进而获取第一级SCI所包含的用于解码PSSCH的侧行控制信息。
进一步地,接收端设备根据第一级SCI的AL字段,可以获知第二级SCI的AL,进而接收第二级SCI,并获取第二级SCI包含的除了第一级SCI所包含的侧行控制信息之外的用于解码PSSCH的其它侧行控制信息。
根据第一级SCI和第二级SCI共同包含的侧行控制信息,接收端设备接收并解码PSSCH,完成侧行通信。
但是,两级SCI的方案并不适用于侧行通信的所有场景。例如,在侧行通信系统中,可能存在物理层单播、组播、广播的场景以及不同的传输模式。例如,网络设备调度资源的模式和终端设备自主选择资源的传输模式。在一些场景下,可能并不需要第二级SCI的指示。
例如,在侧行广播传输的场景下,传输侧行广播数据所需要的所有侧行调度信息均可以包含在第一级SCI中。此时,如果发送端设备继续向接收端设备发送第二级SCI,一方面会导致用于发送第二级SCI的时频资源的浪费,另一方面,也会使得侧行通信系统的频谱效率的降低。
又例如,在侧行通信的过程中,如果接收端设备通过配置许可(configure grant),即通过Uu空口的RRC信令或PC-5空口的RRC信令获得了一部分传输PSSCH的配置信息,那么发送端设备也不需要通过发送第二级SCI指示接收端设备来解码发送端设备发送的 PSSCH。这种场景下,第二级SCI也是冗余的。
考虑到在侧行通信中存在诸多不适合采用两级SCI的场景(例如上述举例的场景),本申请提供一种发送侧行控制信息的方法,旨在侧行通信中去除两级SCI。在不需要第二级SCI的场景下,发送端设备通知接收端设备发送端设备不向接收端设备发送第二级SCI,从而将用于发送第二级SCI的资源用于其它的用途,例如,用于数据传输,从而可以避免资源浪费,同时也可以提高侧行通信系统的频谱效率。
下面对本申请提供的技术方案作详细介绍。
需要说明的是,下文出现的第一终端装置可以为侧行通信中的发送端设备,也可以为安装在发送端设备中的电路系统,例如,芯片或集成电路等。第二终端装置可以为侧行通信中的接收端设备,也可以为安装在接收端设备中的电路系统,例如,芯片或集成电路。
可选地,这里所说的芯片可以为片上系统(system on chip,SoC)、基带芯片等。
参见图2,图2为本申请提供的发送侧行控制信息的方法200的流程图。
210、第一终端装置向第二终端装置发送第一级SCI。
第一级SCI也可以称作第一侧行控制信息。本申请中,第一终端装置也可以称作发送端设备或发送端装置,第二终端装置也可以称作接收端设备或接收端装置。
其中,第一级SCI包括第一指示信息,第一指示信息用于指示第一终端装置是否向第二终端装置发送第二级SCI,第二级SCI也可以称作第二侧行控制信息。
在一种可能的情况下,第一指示信息具体指示第一终端装置不向第二终端装置发送第二级SCI。
在另一种可能的情况下,第一指示信息具体指示第一终端装置向第二终端装置发送第二级SCI。
相应地,第二终端装置接收来自第一终端装置的第一级SCI。
此外,第一级SCI和第二级SCI可以参见上文的说明,这里不再赘述。
若第一指示信息具体指示第一终端装置不向第二终端装置发送第二级SCI,第一终端装置执行步骤220。若第一指示信息具体指示第一终端装置向第二终端装置发送第二级SCI,第一终端装置执行步骤230。
220、第一终端装置根据第一级SCI,向第二终端装置发送PSSCH。
在步骤210,第二终端装置接收到的第一级SCI。根据第一级SCI携带的第一指示信息,若第一指示信息具体指示第一终端装置不向第二终端装置发送第二级SCI,则第二终端装置根据第一级SCI,接收来自第一终端装置的PSSCH,如下文的步骤240。
230、第一终端装置根据第一级SCI和第二级SCI,向第二终端装置发送第二级SCI。
在步骤210,第二终端装置接收到的第一级SCI。根据第一级SCI携带的第一指示信息,若第一指示信息具体指示第一终端装置向第二终端装置发送第二级SCI,则第二终端装置根据第一级SCI和第二级SCI,接收来自第一终端装置的PSSCH,如下文的步骤250-270。
可见,在方法200中,第一终端装置可以通过第一级SCI向第二终端装置指示第一终端装置是否向第二终端装置发送第二级SCI。
若第一终端装置通过第一级SCI包含的第一指示信息指示第一终端装置不向第二终端装置发送第二级SCI,表明PSSCH仅由第一级SCI所包含的侧行控制信息调度。
因此,第一终端装置根据第一级SCI向第二终端装置发送PSSCH。
相应地,第二终端装置接收来自第一终端装置的第一级SCI,根据第一级SCI包含的第一指示信息,可以获知第一终端装置不向第二终端装置发送第二级SCI。因此,第二终端装置根据接收到的第一级SCI所包含的侧行控制信息,接收来自第一终端装置的PSSCH。
若第一终端装置通过第一级SCI包含的第一指示信息指示第一终端装置向第二终端装置发送第二级SCI,表明PSSCH由第一级SCI和第二级SCI所包含的侧行控制信息调度。第一终端装置还需要向第二终端装置发送第二级SCI。
因此,第一终端装置根据第一级SCI和第二级SCI,向第二终端装置发送PSSCH。
相应地,第二终端装置接收来自第一终端装置的第一级SCI,根据第一级SCI包含的第一指示信息,可以获知第一终端装置向第二终端装置发送第二级SCI,表明第一终端装置采用两级SCI调度PSSCH。因此,第二终端装置还需要接收来自第一终端装置的第二级SCI。根据第一级SCI和第二级SCI,第二终端装置从第一终端装置接收PSSCH。
通过方法200提供的技术方案,在侧行通信中,第一终端装置可以灵活地根据通信需求,例如,是否通过两级SCI调度PSSCH,或者通过第一级SCI调度PSSCH,指示第二终端装置是否发送第二级SCI,可以避免在任何侧行通信场景下,统一采用两级SCI而带来的资源浪费,或者说,可以提高资源利用效率。此外,还可以提供系统的频谱效率。
下面给出第一级SCI所包含的第一指示信息的几个示例。
示例1
第一级SCI包括AL字段,所述AL字段具有至少两个有效取值,所述至少两个有效取值中的第一有效取值用于指示第一终端装置不向第二终端装置发送第二级SCI,其中,第一有效取值为0。
如上文所述,第一级SCI包含AL字段,AL字段用于指示第二级SCI的AL。
在本申请中,第二级SCI的AL可以表示第二级SCI的资源单元由多少个用于传输第二级SCI的基本资源单元聚合而成。所述第二级SCI的基本资源单元可以为公共第二级侧行控制元素(common 2 nd-stage sidelink control element,CSCE),为包括若干个连续的资源元素(resource element,RE)的集合,或者包括若干个资源块(resource blocks,RB)的集合。例如,第二级SCI的基本资源单元可以为连续的6个RB,用于解码第二级CSI的DMRS资源。本申请对所述基本资源单元的大小不作限定。
因此,第一级SCI的AL字段可以用于指示第二级SCI所包含的CSCE的数量,或者,AL字段还可以用于指示第二级SCI所包含的RB或RE的数量等。
可选地,一个CSCE可以是若干个连续的RE的集合,也可以是若干个RB的集合。
对于发送端设备和接收端设备而言,第二级SCI的时频资源的起始位置是已知的,例如,可以通过第一级SCI的时频资源的位置,根据指定的对应关系获得,本申请不作限定。进一步的,再通过AL字段的指示信息,发送端设备便可以指示第二级SCI的资源调度信息。
具体地,AL字段可以包括N个比特,其中,N为正整数。
可以理解的是,在采用两级SCI的方案中,发送端装置向接收端装置发送第一级SCI以及第二级SCI,或者说,第二级SCI一定是存在的。因此,第二级SCI的聚合等级AL 通常是等于或者大于1的。
应理解,在AL字段包含的比特数N确定的情况下,AL字段的有效取值的数量也是确定的。
例如,AL字段包含3个比特时,AL字段具有000~111(也即十进制的0~15)共16个有效取值,可以分别索引0~15来表示。AL字段包含2个比特时,AL字段具有00~11(也即十进制的0~3)共4个有效取值,可以分别用索引0~3表示。
但是,在现有的采用两级SCI的场景下,第一级SCI所指示的第二级SCI的AL不包括AL=0的情况。
因此,本申请提出利用第二级SCI的AL=0来隐含表示第一终端装置不向第二终端装置发送第二级SCI。
可以理解的是,第一有效取值“0”为AL字段的有效取值的十进制表示。
为了节省指示开销,AL字段的每个有效取值和一个索引唯一对应。由此,第一级SCI的AL字段的有效取值所对应的索引,和第二级SCI的AL之间的映射关系可以如表1所示。
表1
Figure PCTCN2019109208-appb-000001
需要说明的是,表1中所列数值仅是作为示例。AL字段的有效取值可以为表1中的部分数值,或者表1之外的其它数值。
应理解,在这种实现方式中,AL字段具有至少两个有效取值,所述至少两个有效取值中的有效取值“0”,用于指示第一终端装置不向第二终端装置发送第二级SCI。
在这个示例中,有效取值“0”为本文中所称的第一有效取值。
此外,第一级SCI的AL字段的所述至少两个有效取值中除了第一有效取值之外的其它有效取值,用于指示第一终端装置向第二终端装置发送第二级SCI,且第一有效取值之外的其它任意一个有效取值具体指示第二级SCI的AL。并且,其它有效取值所指示的第二级SCI的AL不为0。
第一终端装置和第二终端装置可以各自保存如表1所示的映射关系。第二终端装置根据接收到的第一级SCI的AL字段所携带的索引,确定第一终端装置是否发送第二级SCI。
情况1
若第一级SCI的AL字段携带索引0(也即,第一有效取值),则表示第一终端装置不发送第二级SCI。此时,第二终端装置根据正确解码的第一级SCI,接收相应的PSSCH,如步骤240。
240、第二终端装置根据正确解码的第一级SCI,接收相应的PSSCH。
这种情况下,由于第一终端装置仅向第二终端装置发送第一级SCI,因此,步骤240中所说的相应的PSSCH是指由第一级SCI调度的PSSCH。
情况2
若第一级SCI的AL字段携带0之外的其它索引(也即,第一有效取值之外的其它有效取值),则表示第一终端装置向第二终端发送第二级SCI。
在第一级SCI的AL字段指示第一终端装置向第二终端装置发送第二级SCI的情况下,第二终端装置可以进一步执行步骤250-270。
250、第二终端装置根据第一级SCI的AL字段,确定第二级SCI的AL。
具体地,根据第一级SCI的AL字段携带的其它有效取值(或其索引),第二终端装置可以确定出和该其它有效取值对应的AL的取值。
例如,第一级SCI的AL字段携带索引7,表示第二级SCI的AL=12。
260、第二终端装置根据确定的第二级SCI的AL,从第一终端装置接收第二级SCI。
对于第一终端装置而言,如果第一级SCI的AL字段指示第一终端装置向第二终端装置发送第二级SCI,则第一终端装置在发送第一级SCI之后,还向第二终端装置发送第二级SCI。第二终端装置根据第一级SCI的AL字段指示的AL的取值,接收第二级SCI。
270、第二终端装置根据第一级SCI和第二级SCI,接收相应的PSSCH。
在第一终端装置向第二终端装置发送第二级SCI的情况下,第二终端装置根据正确解码的第一级SCI和第二级SCI,接收相应的PSSCH。
在步骤270中,“相应的PSSCH”是指第一级SCI和第二级SCI共同调度的PSSCH。
应理解,方法200中对步骤的编号仅是为了清楚地描述技术方案,并不代表各步骤实际的先后顺序。例如,步骤230和步骤260的时序关系,可以是第一终端装置先发送PSSCH,后发送第二级SCI,或者是第一终端装置先发送第二级SCI,后发送PSSCH,再或者,PSSCH和第二级SCI也可以同时发送。相对应地,接收端装置对于第二级SCI和PSSCH的接收顺序也无先后关系。因此,图2所示各步骤的编号不应该对本申请的方案造成限定。
综上所述,第一终端装置不向第二终端装置发送第二级SCI的情况下,图2所示的方法200包括步骤210、步骤220和步骤240。第一终端装置向第二终端装置发送第二级SCI的情况下,方法200包括步骤210、步骤230以及步骤250-270。
此外,这些步骤仅是为了说明技术方案而作的编号,具体的流程可以比图2所示的步骤更少,或者还可以包括其它更多的步骤,本文不作限定。
在示例1中,利用第一级SCI的AL字段的有效取值“0”表示第二级SCI的AL=0,隐含表示第一终端装置不向第二终端装置发送第二级SCI,不会增加信令或指示资源的开销。
示例2
在示例2中,在第一级SCI中额外增加第一指示信息,第一指示信息用于指示第一终端装置是否向第二终端装置发送第二级SCI。
在这种实现中,第一级SCI同时包含AL字段和第一指示信息。
可选地,第一指示信息可以包含1个比特,用于指示第一终端装置是否向第二终端装置发送第二级SCI。例如,第一指示信息包括两个有效取值,分别为“0”和“1”。其中,0表示第一终端装置不向第二终端装置发送第二级SCI,1表示第一终端装置向第二终端装置发送第二级SCI。
进一步地,当第一指示信息具体指示第一终端装置向第二终端装置发送第二级SCI的情况下,第二级SCI的AL的取值可以由第一级SCI的AL字段来指示。其中,第一级SCI的AL字段所指示的第二级SCI的AL不为0。
在这种实现方式,第一指示信息包括两个有效取值,一个有效取值用于指示第一终端装置不向第二终端装置发送第二级SCI,另一个有效取值用于指示第一终端装置向第二终端装置发送第二级SCI。
同样地,第二终端装置根据第一指示信息的有效取值,可以确定第一终端装置是否发送第二级SCI。当第一指示信息指示第一终端装置不发送第二级SCI的情况下,第二终端装置执行步骤230。当第一指示信息指示第一终端装置发送第二级SCI的情况下,第二终端装置执行步骤250-270,参见上文的说明,这里不再赘述。
在方法200中,第一终端装置通过在第一级SCI中携带第一指示信息,向第二终端装置指示第一终端装置是否向第二终端装置发送第二级SCI。下面再给出另一些第一终端装置向第二终端装置指示是否发送第二级SCI的方法。
参见图3,图3为本申请提供的发送侧行控制信息的方法300的流程图。
310、第一终端装置向第二终端装置发送第一级SCI。
其中,第一级SCI对应的循环冗余校验位通过加扰信息加扰。其中,加扰信息包括第一标识或第二标识,第一标识用于指示第一终端装置不向第二终端装置发送第二级SCI,第二标识用于指示第一终端装置向第二终端装置发送第二级SCI。
在一种可能的情况下,第一级SCI对应的循环冗余校验位通过第一标识加扰。
在另一种可能的情况下,第一级SCI对应的循环冗余校验位通过第二标识加扰。
若第一级SCI对应的循环冗余校验(cyclic redundancy check,CRC)通过第一标识加扰,表示第一终端装置不向第二终端装置发送第二级SCI,第一终端装置执行步骤320。
若第一级SCI对应的CRC通过第二标识加扰,表示第一终端装置向第二终端装置发送第二级SCI,第一终端装置还会向第二终端装置发送第二级SCI,并执行步骤330。
相应地,第二终端装置接收来自第一终端装置的第一级SCI,并对第一级SCI的CRC进行解扰。
若第二终端装置使用第一标识对第一级SCI的CRC解扰成功,表示第一终端装置不向第二终端装置发送第二级SCI。若第二终端装置使用第二标识对第一级SCI的CRC解扰成功,表示第一终端装置向第二终端装置发送第二级SCI。
320、第一终端装置根据第一级SCI,向第二终端装置发送PSSCH。
在步骤310,第二终端装置接收到的第一级SCI。根据对第一级SCI的CRC的解扰,可以获知第一终端装置是否向第二终端装置发送第二级SCI。
第二终端装置在使用第一标识对第一级SCI的CRC解扰成功的情况下,第二终端装置根据第一级SCI从第一终端装置接收PSSCH。
330、第一终端装置根据第一级SCI和第二级SCI,向第二终端装置发送第二级SCI。
第二终端装置在使用第二标识对第一级SCI的CRC解扰成功的情况下,表示第一终端装置向第二终端装置发送第二级SCI。在这种情况下,第二终端装置进一步根据第一级SCI的AL字段所指示的第二级SCI的AL,从第一终端装置接收第二级SCI。最后,根据第一级SCI和第二级SCI,从第一终端装置接收PSSCH。
需要说明的是,方法300的第一标识和第二标识的作用在于向第二终端装置隐式指示第一终端装置是否发送第二级SCI。因此,只要定义第一标识和第二标识不同即可,而第一标识和第二标识的具体结构如何,本申请的方案并不关注。
可见,在方法300中,第一终端装置可以通过采用不同的标识对第一级SCI的CRC进行加扰,以向第二终端装置隐式指示第一终端装置是否向第二终端装置发送第二级SCI。
采用方法300,可以在不改变第一级SCI的结构的情况下,实现第一终端装置向第二终端装置指示第一终端装置是否发送第二级SCI,不会带来信令或指示资源的开销。
参见图4,图4为本申请提供的发送侧行控制信息的方法400的流程图。
410、第一终端装置向第二终端装置发送第一级SCI。
420、第一终端装置向第二终端装置发送参考信号。
其中,所述参考信号包括第一参考信号或第二参考信号。第一参考信号用于指示第一终端装置不向第二终端装置发送第二级SCI,第二参考信号用于指示第一终端装置向第二终端装置发送第二级SCI。
可选地,参考信号可以为DMRS。相应地,第一参考信号可以为第一DMRS,第二参考信号可以为第二DMRS。
本领域技术人员应理解,步骤420中,第一终端装置向第二终端装置发送的参考信号用于第二终端装置对信道进行估计,以解码承载第一级SCI的PSCCH。
在一种可能的情况下,第一终端装置向第二终端装置发送第一参考信号,用于信道估计。
在另一种可能的情况下,第一终端装置向第二终端装置发送第二参考信号,用于信道估计。
若第一终端装置向第二终端装置发送第一参考信号,表示第一终端装置不向第二终端装置发送第二级SCI,第一终端装置执行步骤430。
若第一终端装置向第二终端装置发送第二参考信号,表示第一终端装置向第二终端装置发送第二级SCI,第一终端装置执行步骤440。
相应地,第二终端装置检测来自第一终端装置的参考信号。若第二终端装置检测到第一参考信号,第二终端装置获知第一终端装置不发送第二级SCI。
若第二终端装置检测到第二参考信号,第二终端装置获知第一终端装置发送第二级SCI。
430、第一终端装置根据第一级SCI,向第二终端装置发送PSSCH。
在步骤420,第二终端装置检测到第一终端装置发送的第一参考信号,可以获知第一终端装置不向第二终端装置发送第二级SCI。因此,第二终端装置根据第一级SCI,从第一终端装置接收PSSCH。
440、第一终端装置根据第一级SCI和第二级SCI,向第二终端装置发送第二级SCI。
在步骤420,第二终端装置检测到第一终端装置发送的第二参考信号,可以获知第一 终端装置向第二终端装置发送第二级SCI。在这种情况下,第二终端装置进一步根据第一级SCI的AL字段所指示的第二级SCI的AL,从第一终端装置接收第二级SCI。最后,根据第一级SCI和第二级SCI,从第一终端装置接收PSSCH。
与上文的第一标识和第二标识的作用类似,方法400的第一参考信号和第二参考信号的作用在于向第二终端装置隐式指示第一终端装置是否发送第二级SCI。因此,只要定义第一参考信号和第二参考信号不同即可,而第一参考信号和第二参考信号的映射图样如何,本申请的方案并不关注。
可见,在方法400中,第一终端装置通过不同的参考信号用于第二终端装置进行信道估计,以解码承载第一级SCI的PSCCH,可以向第二终端装置隐式指示第一终端装置是否向第二终端装置发送第二级SCI。
采用方法400,可以在不改变第一级SCI的结构的情况下,实现第一终端装置向第二终端装置指示第一终端装置是否发送第二级SCI,不会带来信令或指示资源的开销。
以上对本申请的技术方案作了详细说明。在侧行通信系统中不需要第二级SCI的场景下,侧行通信的发送端装置(也即,第一终端装置)可以通过第一级SCI,或者第一SCI的CRC的加扰信息,或者用于信道估计以对承载第一级SCI的PSCCH进行解码的参考信号,向接收端装置(也即,第二终端装置)指示第一终端装置是否发送第二级SCI,从而可以根据侧行通信的具体场景,灵活地选择采用两级SCI或一级SCI,既可以避免在侧行通信的任何场景下都一律采用两级SCI而导致资源浪费,同时可以提高侧行通信系统的频谱效率。
下面列举几种侧行通信中,第一终端装置不向第二终端装置发送第二级SCI的场景示例,本申请的技术方案在如下列举的场景中,都是适用的。
场景示例1
侧行广播数据传输
在这种场景下,第一终端装置用于调度侧行广播数据的所有侧行调度信息均可以由第一级SCI指示,第一终端装置不需要向第二终端装置发送第二级SCI。
场景示例2
Mode 1的配置许可模式
在这种场景下,发送端装置向接收端装置发送无线资源控制(radio resource control,RRC)消息,RRC消息中携带配置许可(configured grant),其中,需要由第二级SCI指示的信息可以承载在所述配置许可中。因此,第一终端装置不需要向第二终端装置发送第二级SCI。
场景示例3
Mode 2的终端装置自主选择资源的模式
在这种场景下,需要由第二级SCI指示的信息可以承载在预配置的侧行许可(sidelink grant,SG)或时频资源样式(time frequency resource pattern,TFRP)中。
发送端装置和接收端装置都已知预配置的SG和TFRP。因此,接收端装置可以通过感知和测量,判断发送端装置使用了哪种SG和TFRP。因此,第一终端装置不需要向第二终端装置发送第二级SCI。
应理解,以上几种场景仅是作为举例。侧行通信中可能还存在其它不需要采用两级 SCI方案的场景,本申请的方案都是适用的。
以上对本申请提供的发送和接收侧行控制信息的方法进行了详细说明,下面介绍本申请提供的终端装置。
参见图5,图5为本申请提供的终端装置1000的示意性框图。如图5所示,终端装置1000包括收发单元1100和处理单元1200。
在一种实现方式中,终端装置1000通过在第一级SCI携带的第一指示信息,指示所述终端装置1000是否向第二终端装置发送第二级SCI。在这种实现方式中,收发单元1100和处理单元1200的功能如下:
收发单元1100,用于向第二终端装置发送第一级侧行控制信息SCI,所述第一级SCI包括第一指示信息,所述第一指示信息用于指示所述终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI;
处理单元1200,用于根据所述第一级SCI控制收发单元1200向所述第二终端装置发送PSSCH,其中,所述第一指示信息指示所述终端装置不向所述第二终端装置发送第二级侧行控制信息SCI;或者,
处理单元1200,用于根据所述第一级SCI和所述第二级SCI,控制收发单元1200向所述第二终端装置发送PSSCH,其中,所述第一指示信息指示所述终端装置不向所述第二终端装置发送第二级侧行控制信息SCI,。
可选地,收发单元1100也可以由发送单元或者接收单元替代。例如,收发单元1100在执行发送的动作时,可以由发送单元替代。收发单元1100执行接收的动作时,可以由接收单元替代。
可选地,在一个实施例中,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
所述第一级SCI包括聚合等级AL字段,所述AL字段具有至少两个有效取值,所述至少两个有效取值包括第一有效取值,所述第一有效取值为0,0用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;以及,
所述至少两个有效取值中除了所述第一有效取值之外的其它有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,且任意一个所述其它有效取值具体用于指示所述第二级SCI的聚合等级。
可选地,在另一个实施例中,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
所述第一指示信息具有至少两个有效取值,所述至少两个有效取值中的第一有效取值用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;
所述至少两个有效取值中的第二有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,以及,所述第一级SCI还包括聚合等级AL字段,所述AL字段的有效取值用于指示所述第二级SCI的聚合等级。
可选地,在另一个实施例中,所述第一指示信息指示所述终端装置不向所述第二终端装置发送第二级侧行控制信息SCI,所述处理单元1200根据所述第一级SCI控制所述收发单元1100向所述第二终端装置发送PSSCH,其中,所述PSSCH的传输类型为广播。
在另一种实现方式中,终端装置1000通过第一级SCI的加扰信息,指示所述终端装 置1000是否向第二终端装置发送第二级SCI。在这种实现方式中,收发单元1100和处理单元1200的功能如下:
收发单元1100,用于向第二终端装置发送第一级SCI,所述第一SCI的循环冗余校验位通过加扰信息进行加扰,其中,所述加扰信息包括第一标识或第二标识,所述第一标识用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二标识用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
处理单元1200,用于根据所述第一级SCI,控制收发单元1100向所述第二终端装置发送物理侧行共享信道PSSCH,其中,所述加扰信息包括第一标识;或者,
处理单元1200,用于根据所述第一级SCI和所述第二级SCI,控制收发单元1100向所述第二终端装置发送物理侧行共享信道PSSCH,其中,所述加扰信息包括第二标识。
在再一种实现方式中,终端装置1000通过用于解码第一级SCI的参考信号,指示所述终端装置1000是否向第二终端装置发送第二级SCI。在这种实现方式中,收发单元1100和处理单元1200的功能如下:
收发单元1100,用于向所述第二终端装置发送参考信号,所述参考信号包括第一参考信号或第二参考信号,其中,所述第一参考信号用于指示所述终端装置不向所述第二终端装置发送第二级SCI,所述第二参考信号用于指示所述终端装置向所述第二终端装置发送第二级SCI;
处理单元1200,用于根据所述第一级SCI,控制收发单元1100向所述第二终端装置发送物理侧行共享信道PSSCH,其中,所述参考信号包括第一参考信号;或者,
处理单元1200,用于根据所述第一级SCI和所述第二级SCI,控制收发单元1100向所述第二终端装置发送所述PSSCH,其中,所述参考信号包括第二参考信号。
可选地,在一个实施例中,所述参考信号可以为DMRS。第一参考信号可以为第一DMRS,第二参考信号可以为第二DMRS。
可选地,终端装置1000可以为侧行通信中的发送端设备,例如,终端设备或终端设备中可实现上述第一终端装置的功能的组合器件、部件等。收发单元1100可以为收发器。收发器可以由接收器或发射器代替。例如,收发器在执行发送的动作时,可以由发送器替代。收发器执行接收的动作时,可以由接收器替代。处理单元1200可以为处理装置或处理器。
可选地,终端装置1000可以为安装在发送端设备中的电路系统,例如,芯片或片上系统(system on chip,SoC)等。在这种实现方式中,收发单元1100可以为通信接口。例如,收发单元1100可以为输入输出接口或者输入输出电路。输入输出接口可以包括输入接口和输出接口。输入输出电路可以包括输入电路和输出电路。处理单元1200可以为处理装置或处理器。
其中,处理装置的功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。例如,处理装置可以包括一个或多个存储器以及一个或多个处理器,其中,所述一个或多个存储器用于存储计算机程序,所述一个或多个处理器读取并执行所述一个或多个存储器中存储的计算机程序,使得终端装置1000执行各方法实施例中由第一终端装置执行的操作和/或处理。
可选地,处理装置可以仅包括处理器,用于存储计算机程序的存储器位于处理装置之 外。处理器通过电路/电线与存储器连接,以读取并执行存储器中存储的计算机程序。
可选地,收发单元1100可以为射频装置,处理单元1200可以为基带装置。
参见图6,图6为本申请提供的终端装置2000的示意性框图。如图6所示,终端装置包括收发单元2100和处理单元2200。
在一种实现方式中,侧行通信的发送端装置(例如,本文中的第一终端装置)通过第一级SCI携带的第一指示信息,指示第一终端装置是否向侧行通信的接收端装置发送第二级SCI。在这种实现方式中,收发单元2100和处理单元2200的功能如下:
收发单元2100,用于接收来自第一终端装置的第一级SCI,所述第一级SCI包括第一指示信息,所述第一指示信息用于指示所述第一终端装置是否向所述终端装置发送第二级SCI;
处理单元2200,用于根据所述第一级SCI,控制收发单元2100接收来自所述第一终端装置的PSSCH,其中,所述第一指示信息指示所述第一终端装置不向所述终端装置发送所述第二级SCI;或者,
处理单元2200,用于根据所述第一级SCI和所述第二级SCI,控制收发单元2100接收来自所述第一终端装置的PSSCH,其中,所述第一指示信息指示所述第一终端装置向所述第二终端装置发送所述第二级SCI。
可选地,收发单元2100也可以由发送单元或者接收单元替代。例如,收发单元2100在执行发送的动作时,可以由发送单元替代。收发单元2100执行接收的动作时,可以由接收单元替代。
可选地,在一个实施例中,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
所述第一级SCI包括聚合等级AL字段,所述AL字段具有至少两个有效取值,所述至少两个有效取值包括第一有效取值,所述第一有效取值为0,0用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;以及,
所述至少两个有效取值中除了所述第一有效取值之外的其它有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,且任意一个所述其它有效取值具体用于指示所述第二级SCI的聚合等级。
可选地,在另一个实施例中,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
所述第一指示信息具有至少两个有效取值,所述至少两个有效取值中的第一有效取值用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;
所述至少两个有效取值中的第二有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,以及,所述第一级SCI还包括聚合等级AL字段,所述AL字段的有效取值用于指示所述第二级SCI的聚合等级。
在另一种实现方式中,第一终端装置通过第一级SCI的加扰信息,指示第一终端装置是否向终端装置发送第二级SCI。在这种实现方式中,终端装置2000的收发单元2100和处理单元2200的功能如下:
收发单元2100,用于接收来自第一终端装置的第一级SCI,所述第一级SCI的循环冗余校验位通过加扰信息加扰,其中,所述加扰信息包括第一标识或第二标识,所述第一标 识用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二标识用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
处理单元2200,用于根据所述第一级SCI,控制收发单元2100接收来自所述第一终端装置的PSSCH,其中,所述加扰信息包括第一标识;或者,
处理单元2200,用于根据所述第一级SCI和所述第二级SCI,控制收发单元2100接收来自所述第一终端装置的PSSCH,其中,所述加扰信息包括第二标识。
在再一种实现方式中,第一终端装置通过用于解码第一级SCI的参考信号,指示第一终端装置是否向所述终端装置发送第二级SCI。在这种实现方式中,终端装置2000的收发单元1100和处理单元1200的功能如下:
收发单元2100,用于接收来自第一终端装置的第一级侧行控制信息SCI;
所述收发单元2100,还用于检测来自所述第一终端装置的参考信息,所述参考信号包括第一参考信号或第二参考信号,其中,所述第一参考信号用于指示所述第一终端装置不向所述终端装置发送第二级SCI,所述第二参考信号用于指示所述第一终端装置向所述终端装置发送第二级SCI;
处理单元2200,用于根据所述第一级SCI,控制收发单元2100接收来自所述第一终端装置的PSSCH,其中,所述参考信号包括第一参考信号;或者,
处理单元2200,用于根据所述第一级SCI和所述第二级SCI,控制收发单元2100接收来自所述第一终端装置的PSSCH,其中,所述参考信号包括第二参考信号。
可选地,终端装置2000可以为侧行通信中的接收端设备,例如终端设备或终端设备中可实现上述第二终端装置的功能的组合器件、部件。收发单元2100可以为收发器。收发器可以由接收器或发射器代替。例如,收发器在执行发送的动作时,可以由发送器替代。收发器执行接收的动作时,可以由接收器替代。处理单元2200可以为处理装置或处理器。
在另一种实现方式中,终端装置2000可以为安装在接收端设备中的电路系统,例如,芯片或集成电路等。收发单元2100可以为通信接口。例如,收发单元2100可以为输入输出接口或者输入输出电路。输入输出接口可以包括输入接口和输出接口。输入输出电路可以包括输入电路和输出电路。处理单元2200可以为处理装置。
其中,处理装置的功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。例如,处理装置可以包括一个或多个存储器以及一个或多个处理器,其中,所述一个或多个存储器用于存储计算机程序,所述一个或多个处理器读取并执行所述一个或多个存储器中存储的计算机程序,使得终端装置2000执行各方法实施例中由第二终端装置执行的操作和/或处理。
可选地,处理装置可以仅包括处理器,用于存储计算机程序的存储器位于处理装置之外。处理器通过电路/电线与存储器连接,以读取并执行存储器中存储的计算机程序。
可选地,收发单元2100可以为射频装置,处理单元2200可以为基带装置。
参见图7,图7是本申请提供的终端装置10的示意性结构图。如图7所示,终端装置10包括:一个或多个处理器11,一个或多个存储器12,以及一个或多个通信接口13。其中,处理器11用于控制通信接口13收发信号,存储器12用于存储计算机程序,处理器11用于从存储器12中调用并运行所述计算机程序,使得终端装置10执行本申请的各方法实施例中由第一终端装置执行的处理和/或操作。
例如,处理器11可以具有图5中所示的处理单元1200的功能,通信接口13可以具有图5中所示的收发单元1100的功能。具体可以参见图5中的说明,这里不再赘述。
可选地,当终端装置10为侧行链路的发送端设备时,处理器11可以为安装在发送端设备中的基带装置,通信接口13可以为射频装置。
参见图8,图8是本申请提供的终端装置20的示意性结构图。如图8所示,终端装置20包括:一个或多个处理器21,一个或多个存储器22,以及一个或多个通信接口23。处理器21用于控制通信接口23收发信号,存储器22用于存储计算机程序,处理器21用于从存储器22中调用并运行所述计算机程序,使得终端装置20执行本申请的各方法实施例中由第二终端装置执行的处理和/或操作。
例如,处理器21可以具有图6中所示的处理单元2200的功能,通信接口23可以具有图6中所示的收发单元2100的功能。具体可以参见图6中的说明,这里不再赘述。
可选的,上述各装置实施例中的存储器与存储器可以是物理上相互独立的单元,或者,存储器也可以和处理器集成在一起。
此外,本申请还提供一种计算机可读存储介质,计算机可读存储介质中存储有计算机指令,当计算机指令在计算机上运行时,使得计算机执行本申请提供的发送侧行控制信息的方法中由第一终端装置执行的操作和/或处理。
本申请还提供一种计算机可读存储介质,计算机可读存储介质中存储有计算机指令,当计算机指令在计算机上运行时,使得计算机执行本申请提供的发送侧行控制信息的方法中由第二终端装置执行的操作和/或处理。
本申请还提供一种计算机程序产品,计算机程序产品包括计算机程序代码,当计算机程序代码在计算机上运行时,使得计算机执行本申请提供的发送侧行控制信息的方法中由第一终端装置执行的操作和/或处理。
本申请还提供一种计算机程序产品,计算机程序产品包括计算机程序代码,当计算机程序代码在计算机上运行时,使得计算机执行本申请提供的发送侧行控制信息的方法中由第二终端装置执行的操作和/或处理。
本申请还提供一种终端装置,包括处理器和接口电路,所述接口电路用于接收计算机代码或指令,并传输至所述处理器,所述处理器用于运行所述计算机代码或指令,以执行本申请提供的发送侧行控制信息的方法中由第一终端装置执行的操作和/或处理。
本申请还提供一种终端装置,包括处理器和接口电路,所述接口电路用于接收计算机代码或指令,并传输至所述处理器,所述处理器用于运行所述计算机代码或指令,以执行本申请提供的发送侧行控制信息的方法中由第二终端装置执行的操作和/或处理。
本申请还提供一种芯片,所述芯片包括一个或多个处理器。所述一个或多个处理器用于执行存储器中存储的计算机程序,以执行任意一个方法实施例中由第一终端装置执行的操作和/或处理。其中,用于存储计算机程序的存储器独立于所述芯片之外而设置。
进一步地,所述芯片还可以包括一个或多个通信接口。所述一个或多个通信接口可以是输入/输出接口,输入/输出电路等。进一步地,所述芯片还可以包括一个或多个所述存储器。
本申请还提供一种芯片,所述芯片包括一个或多个处理器。所述一个或多个处理器用于执行存储器中存储的计算机程序,以执行任意一个方法实施例中由第二终端装置执行的 操作和/或处理。其中,用于存储计算机程序的存储器独立于所述芯片之外而设置。
进一步地,所述芯片还可以包括一个或多个通信接口。所述一个或多个通信接口可以是输入/输出接口,输入/输出电路等。进一步地,所述芯片还可以包括一个或多个所述存储器。
此外,本申请还提供一种侧行通信系统,包括本申请实施例中的第一终端装置和/或第二终端装置。
进一步地,所述侧行通信系统中还可以包括接入网设备和/或核心网设备。
本申请实施例中的处理器可以是集成电路芯片,具有处理信号的能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。处理器可以是通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application specific integrated circuit,ASIC)、现场可编程门阵列(field programmable gate array,FPGA)或其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。本申请实施例公开的方法的步骤可以直接体现为硬件编码处理器执行完成,或者用编码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
本申请实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(read-only memory,ROM)、可编程只读存储器(programmable ROM,PROM)、可擦除可编程只读存储器(erasable PROM,EPROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM,DRRAM)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
在本说明书中使用的术语“单元”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件或执行中的软件。例如,部件可以是但不限于,在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示,在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中。部件可位于一个计算机上和/或分布在两个或更多个计算机之间。此外,这些部件可从上面存储有各种数据结构的各种计算机可读介质执行。部件可根据具有一个或多个数据分组(例如,来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据,例如,通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及 算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本申请的具体实施方式。任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。本申请的保护范围应以权利要求书的保护范围为准。

Claims (41)

  1. 一种发送侧行控制信息的方法,其特征在于,包括:
    第一终端装置向第二终端装置发送第一级侧行控制信息SCI,所述第一级SCI包括第一指示信息,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI;
    所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送第二级侧行控制信息SCI,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送物理侧行共享信道PSSCH,或
    所述第一指示信息指示所述第一终端装置向所述第二终端装置发送第二级侧行控制信息SCI,所述第一终端装置根据所述第一级SCI和所述第二级SCI向所述第二终端装置发送物理侧行共享信道PSSCH。
  2. 根据权利要求1所述的方法,其特征在于,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
    所述第一级SCI包括聚合等级AL字段,所述AL字段具有至少两个有效取值,所述至少两个有效取值包括第一有效取值,所述第一有效取值为0,0用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;以及,
    所述至少两个有效取值中除了所述第一有效取值之外的其它有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,且任意一个所述其它有效取值具体用于指示所述第二级SCI的聚合等级。
  3. 根据权利要求1所述的方法,其特征在于,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
    所述第一指示信息具有至少两个有效取值,所述至少两个有效取值中的第一有效取值用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;
    所述至少两个有效取值中的第二有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,以及,所述第一级SCI还包括聚合等级AL字段,所述AL字段的有效取值用于指示所述第二级SCI的聚合等级。
  4. 根据权利要求1-3中任一项所述的方法,其特征在于,所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送第二级侧行控制信息SCI,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送物理侧行共享信道PSSCH,其中,所述PSSCH的传输类型为广播。
  5. 一种发送侧行控制信息的方法,其特征在于,包括:
    第一终端装置向第二终端装置发送第一级侧行控制信息SCI,所述第一SCI相对应的循环冗余校验位通过加扰信息进行加扰,其中,所述加扰信息包括第一标识或第二标识,所述第一标识用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二标识用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
    所述加扰信息包括第一标识,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送物理侧行共享信道PSSCH,或者
    所述加扰信息包括第二标识,所述第一终端装置根据所述第一级SCI和所述第二级SCI向所述第二终端装置发送物理侧行共享信道PSSCH。
  6. 根据权利要求5所述的方法,其特征在于,所述加扰信息包括第一标识,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送所述PSSCH,所述PSSCH的传输类型为广播。
  7. 一种发送侧行控制信息的方法,其特征在于,包括:
    第一终端装置向第二终端装置发送第一级侧行控制信息SCI;
    所述第一终端装置向所述第二终端装置发送参考信号,所述参考信号包括第一参考信号或第二参考信号,其中,所述第一参考信号用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二参考信号用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
    所述参考信号包括所述第一参考信号,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送物理侧行共享信道PSSCH;
    所述参考信号包括所述第二参考信号,所述第一终端装置根据所述第一级SCI和所述第二级SCI向所述第二终端装置发送所述PSSCH。
  8. 根据权利要求7所述的方法,其特征在于,所述参考信号包括所述第一参考信号,所述第一终端装置根据所述第一级SCI向所述第二终端装置发送所述PSSCH,其中,所述PSSCH的传输类型为广播。
  9. 根据权利要求7或8所述的方法,其特征在于,所述参考信号包括用于解调承载所述第一级SCI的侧行物理控制信道PSCCH的解调参考信号DMRS,所述第一参考信号为第一DMRS,所述第二参考信号为第二DMRS。
  10. 一种接收侧行控制信息的方法,其特征在于,包括:
    第二终端装置接收来自第一终端装置的第一级SCI,所述第一级SCI包括第一指示信息,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级SCI;
    所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI,所述第二终端装置根据所述第一级SCI接收来自所述第一终端装置的物理侧行共享信道PSSCH;
    所述第一指示信息指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,所述第二终端装置根据所述第一级SCI和所述第二级SCI,接收来自所述第一终端装置的PSSCH。
  11. 根据权利要10所述的方法,其特征在于,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
    所述第一级SCI包括聚合等级AL字段,所述AL字段具有至少两个有效取值,所述至少两个有效取值包括第一有效取值,所述第一有效取值为0,0用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;以及,
    所述至少两个有效取值中除了所述第一有效取值之外的其它有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,且任意一个所述其它有效取值具体用于指示所述第二级SCI的聚合等级。
  12. 根据权利要求10所述的方法,其特征在于,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
    所述第一指示信息具有至少两个有效取值,所述至少两个有效取值中的第一有效取值用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;
    所述至少两个有效取值中的第二有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,以及,所述第一级SCI还包括聚合等级AL字段,所述AL字段的有效取值用于指示所述第二级SCI的聚合等级。
  13. 根据权利要求10-12中任一项所述的方法,其特征在于,所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二终端装置根据所述第一级SCI接收来自所述第一终端装置的PSSCH,其中,所述PSSCH的传输类型为广播。
  14. 一种接收侧行控制信息的方法,其特征在于,包括:
    第二终端装置接收来自第一终端装置的第一级侧行控制信息SCI,所述第一级SCI相对应的循环冗余校验位通过加扰信息加扰,其中,所述加扰信息包括第一标识或第二标识,所述第一标识用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二标识用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
    所述加扰信息包括第一标识,所述第二终端装置根据所述第一级SCI接收来自所述第一终端装置的PSSCH;或者,
    所述加扰信息包括第二标识,所述第二终端装置根据所述第一级SCI和所述第二级SCI,接收来自所述第一终端装置的PSSCH。
  15. 根据权利要求14所述的方法,其特征在于,所述加扰信息包括第一标识,所述第二终端装置根据所述第一级SCI接收来自所述第一终端装置的所述PSSCH,其中,所述PSSCH的传输类型为广播。
  16. 一种接收侧行控制信息的方法,其特征在于,包括:
    第二终端装置接收来自第一终端装置的第一级侧行控制信息SCI;
    所述第二终端装置检测来自所述第一终端装置的参考信号,其中,所述参考信号包括第一参考信号或第二参考信号,其中,所述第一参考信号用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二参考信号用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
    所述参考信号包括所述第一参考信号,所述第二终端装置根据所述第一级SCI,接收来自所述第一终端装置的物理侧行共享信道PSSCH;或者,
    所述参考信号包括所述第二参考信号,所述第二终端装置根据所述第一级SCI和所述第二级SCI,接收来自所述第一终端装置的PSSCH。
  17. 根据权利要求16所述的方法,其特征在于,所述参考信号包括所述第一参考信号,所述第二终端装置根据所述第一级SCI接收来自所述第一终端装置的所述PSSCH,所述PSSCH的传输类型为广播。
  18. 根据权利要求16或17所述的方法,其特征在于,所述参考信号包括用于解调承载所述第一级SCI的侧行物理控制信道PSCCH的解调参考信号DMRS,所述第一参考信号为第一DMRS,所述第二参考信号为第二DMRS。
  19. 一种终端装置,其特征在于,包括:
    收发单元,用于向第二终端装置发送第一级侧行控制信息SCI,所述第一级SCI包括第一指示信息,所述第一指示信息用于指示所述终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI;
    处理单元,用于根据所述第一级SCI控制所述收发单元向所述第二终端装置发送物理侧行共享信道PSSCH,其中,所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送第二级侧行控制信息SCI;或者,
    所述处理单元,用于根据所述第一级SCI和所述第二级SCI,控制所述收发单元向所述第二终端装置发送PSSCH,其中,所述第一指示信息指示所述终端装置向所述第二终端装置发送第二级侧行控制信息SCI。
  20. 根据权利要求19所述的终端装置,其特征在于,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
    所述第一级SCI包括聚合等级AL字段,所述AL字段具有至少两个有效取值,所述至少两个有效取值包括第一有效取值,所述第一有效取值为0,0用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;以及,
    所述至少两个有效取值中除了所述第一有效取值之外的其它有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,且任意一个所述其它有效取值具体用于指示所述第二级SCI的聚合等级。
  21. 根据权利要求19所述的终端装置,其特征在于,所述第一指示信息用于指示所述第一终端装置是否向所述第二终端装置发送第二级侧行控制信息SCI,包括:
    所述第一指示信息具有至少两个有效取值,所述至少两个有效取值中的第一有效取值用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;
    所述至少两个有效取值中的第二有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,以及,所述第一级SCI还包括聚合等级AL字段,所述AL字段的有效取值用于指示所述第二级SCI的聚合等级。
  22. 根据权利要求19-21中任一项所述的终端装置,其特征在于,所述第一指示信息指示所述第一终端装置不向所述第二终端装置发送第二级侧行控制信息SCI,所述处理单元用于根据所述第一级SCI控制所述收发单元向所述第二终端装置发送所述PSSCH,其中,所述PSSCH的传输类型为广播。
  23. 一种终端装置,其特征在于,包括:
    收发单元,用于向第二终端装置发送第一级侧行控制信息SCI,所述第一SCI相对应的循环冗余校验位通过加扰信息进行加扰,其中,所述加扰信息包括第一标识或第二标识,所述第一标识用于指示所述终端装置不向所述第二终端装置发送第二级SCI,所述第二标识用于指示所述终端装置向所述第二终端装置发送第二级SCI;
    处理单元,用于根据所述第一级SCI,控制所述收发单元向所述第二终端装置发送物理侧行共享信道PSSCH,其中,所述加扰信息包括第一标识,或者
    所述处理单元,用于根据所述第一级SCI和所述第二级SCI,控制所述收发单元向所述第二终端装置发送物理侧行共享信道PSSCH,其中,所述加扰信息包括第二标识。
  24. 根据权利要求23所述的终端装置,其特征在于,所述加扰信息包括第一标识,所述处理单元用于根据所述第一级SCI控制所述收发单元向所述第二终端装置发送所述 PSSCH,其中,所述PSSCH的传输类型为广播。
  25. 一种终端装置,其特征在于,包括:
    收发单元,用于向第二终端装置发送第一级侧行控制信息SCI;
    所述收发单元,还用于向所述第二终端装置发送参考信号,所述参考信号包括第一参考信号或第二参考信号,其中,所述第一参考信号用于指示所述第一终端装置不向所述第二终端装置发送第二级SCI,所述第二参考信号用于指示所述第一终端装置向所述第二终端装置发送第二级SCI;
    处理单元,用于根据所述第一级SCI向所述第二终端装置发送物理侧行共享信道PSSCH,其中,所述参考信号包括所述第一参考信号;或者,
    所述处理单元,用于根据所述第一级SCI和所述第二级SCI向所述第二终端装置发送所述PSSCH,其中,所述参考信号包括所述第二参考信号。
  26. 根据权利要求25所述的终端装置,其特征在于,所述参考信号包括所述第一参考信号,所述处理单元用于根据所述第一级SCI,控制所述收发单元向所述第二终端装置发送PSSCH,其中,所述PSSCH的传输类型为广播。
  27. 根据权利要求25或26所述的终端装置,其特征在于,所述参考信号包括用于解调承载所述第一级SCI的侧行物理控制信道PSCCH的解调参考信号DMRS,所述第一参考信号为第一DMRS,所述第二参考信号为第二DMRS。
  28. 一种终端装置,其特征在于,包括:
    收发单元,用于接收来自第一终端装置的第一级SCI,所述第一级SCI包括第一指示信息,所述第一指示信息用于指示所述第一终端装置是否向所述终端装置发送第二级SCI;
    处理单元,用于根据所述第一级SCI接收来自所述第一终端装置的物理侧行共享信道PSSCH,其中,所述第一指示信息指示所述第一终端装置不向所述终端装置发送所述第二级SCI;或者,
    所述处理单元,用于根据所述第一级SCI和所述第二级SCI,接收来自所述第一终端装置的PSSCH,其中,所述第一指示信息指示所述第一终端装置向所述终端装置发送所述第二级SCI。
  29. 根据权利要求28所述的终端装置,其特征在于,所述第一指示信息用于指示所述第一终端装置是否向所述终端装置发送第二级侧行控制信息SCI,包括:
    所述第一级SCI包括聚合等级AL字段,所述AL字段具有至少两个有效取值,所述至少两个有效取值包括第一有效取值,所述第一有效取值为0,0用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;以及,
    所述至少两个有效取值中除了所述第一有效取值之外的其它有效取值用于指示所述第一终端装置向所述第二终端装置发送所述第二级SCI,且任意一个所述其它有效取值具体用于指示所述第二级SCI的聚合等级。
  30. 根据权利要求28所述的终端装置,其特征在于,所述第一指示信息用于指示所述第一终端装置是否向所述终端装置发送第二级侧行控制信息SCI,包括:
    所述第一指示信息具有至少两个有效取值,所述至少两个有效取值中的第一有效取值用于指示所述第一终端装置不向所述第二终端装置发送所述第二级SCI;
    所述至少两个有效取值中的第二有效取值用于指示所述第一终端装置向所述第二终 端装置发送所述第二级SCI,以及,所述第一级SCI还包括聚合等级AL字段,所述AL字段的有效取值用于指示所述第二级SCI的聚合等级。
  31. 根据权利要求28-30中任一项所述的终端装置,所述第一指示信息指示所述第一终端装置不向所述终端装置发送第二级侧行控制信息SCI,所述处理单元用于根据所述第一级SCI,控制所述收发单元向所述终端装置发送所述PSSCH,其中,所述PSSCH的传输类型为广播。
  32. 一种终端装置,其特征在于,包括:
    收发单元,用于接收来自第一终端装置的第一级侧行控制信息SCI,所述第一级SCI相对应的循环冗余校验位通过加扰信息加扰,其中,所述加扰信息包括第一标识或第二标识,所述第一标识用于指示所述第一终端装置不向所述终端装置发送第二级SCI,所述第二标识用于指示所述第一终端装置向所述终端装置发送第二级SCI;
    处理单元,用于根据所述第一级SCI接收来自所述第一终端装置的PSSCH,其中,所述加扰信息包括第一标识;或者,
    所述处理单元,用于根据所述第一级SCI和所述第二级SCI,接收来自所述第一终端装置的PSSCH,其中,所述加扰信息包括第二标识。
  33. 根据权利要求32所述的终端装置,其特征在于,所述加扰信息包括第一标识,所述处理单元用于根据所述第一级SCI,控制所述收发单元接收来自所述第一终端装置的PSSCH,其中,所述PSSCH的传输类型为广播。
  34. 一种终端装置,其特征在于,包括:
    收发单元,用于接收来自第一终端装置的第一级侧行控制信息SCI;
    所述收发单元,还用于检测来自所述第一终端装置的参考信号,其中,所述参考信号包括第一参考信号或第二参考信号,其中,所述第一参考信号用于指示所述第一终端装置不向所述终端装置发送第二级SCI,所述第二参考信号用于指示所述第一终端装置向所述终端装置发送第二级SCI;
    处理单元,用于根据所述第一级SCI,接收来自所述第一终端装置的物理侧行共享信道PSSCH,其中,所述参考信号包括所述第一参考信号;或者,
    所述处理单元,用于根据所述第一级SCI和所述第二级SCI,接收来自所述第一终端装置的PSSCH,其中,所述参考信号包括所述第二参考信号。
  35. 根据权利要求34所述的终端装置,其特征在于,所述PSSCH的传输类型为广播。
  36. 根据权利要求34或35所述的终端装置,其特征在于,所述参考信号包括用于解调承载所述第一级SCI的侧行物理控制信道PSCCH的解调参考信号DMRS,所述第一参考信号为第一DMRS,所述第二参考信号为第二DMRS。
  37. 一种终端装置,其特征在于,包括至少一个处理器,所述至少一个处理器与至少一个存储器耦合:
    所述至少一个处理器,用于执行所述至少一个存储器中存储的计算机程序或指令,以使得所述终端装置执行如权利要求1-9中任一项所述的方法。
  38. 一种终端装置,其特征在于,包括至少一个处理器,所述至少一个处理器与至少一个存储器耦合:
    所述至少一个处理器,用于执行所述至少一个存储器中存储的计算机程序或指令,以 使得所述终端装置执行如权利要求10-18中任一项所述的方法。
  39. 一种计算机可读存储介质,用于存储指令,当所述指令被执行时,如权利要求1-9中任一项所述的方法被实现。
  40. 一种计算机可读存储介质,用于存储指令,当所述指令被执行时,如权利要求10-18中任一项所述的方法被实现。
  41. 一种无线通信系统,其特征在于,包括如权利要求19-27中任一项所述的终端装置,和/或如权利要求28-36中所述的通信装置。
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