WO2021088081A1

WO2021088081A1 - Control information sending method, receiving method and communication apparatus

Info

Publication number: WO2021088081A1
Application number: PCT/CN2019/116881
Authority: WO
Inventors: 黎超
Original assignee: 华为技术有限公司
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2021-05-14
Also published as: CN114557082A; WO2021088081A9

Abstract

The present application discloses a control information sending method and receiving method, and a communication apparatus, which can be applied to a communication system, such as a V2X, an LTE-V, a V2V, an Internet of Vehicles, an MTC, an Internet of Things, an LTE-M, and an M2M communication system, and are used to determine transmission resources of second-level control information, so that data transmission is implemented between a sending device and a receiving device according to the second-level control information. The method comprises: determining the number of bits of second control information; determining second time-frequency resources in first time-frequency resources according to the number of bits of the second control information, wherein the first time-frequency resources are time-frequency resources indicated by the first control information, and the second time-frequency resources are used to bear resources of a coded modulation symbol of the second control information; and sending the second control information on the second time-frequency resources.

Description

Control information sending method, receiving method and communication device

Technical field

This application relates to the field of mobile communication technology, and in particular, to a method for sending control information, a method for receiving, and a communication device.

Background technique

Device to device (D2D) communication, vehicle to vehicle (V2V) communication, vehicle to pedestrian (V2P) communication, or vehicle to infrastructure/network (V2I/ N) Communication is a technology for direct communication between terminal devices. V2V, V2P, and V2I/N are collectively referred to as V2X (vehicle to everything, V2X), that is, the vehicle communicates with anything.

In the discussion of (new radio, NR)-V2X, the current 3rd generation partnership project (3GPP) is discussing the way in which sidelink control information (SCI) is sent together with data . However, the current standard does not determine how to determine the transmission resources of the second level SCI. If the transmission resources of the second-level SCI cannot be determined effectively, the transmitter does not know how to send, and the receiver does not know the corresponding reception. The communication link of the entire sidewalk cannot be established.

Summary of the invention

The embodiments of the present application provide a control information sending method, receiving method, and communication device, which can be applied to communication systems, such as V2X, vehicle to vehicle (V2V), and long term evolution-vehicle communication. to vehicle, LTE-V2V), car networking, machine type communication (MTC) systems, Internet of things (IoT), long term evolution-machine to machine communication (long term evolution-machine to machine, LTE- M2M), a communication system such as machine to machine (M2M), is used to determine the transmission resources of the second-level control information, so that the sending device and the receiving device can realize data transmission according to the second-level control information.

In the first aspect, an embodiment of the present application provides a method for sending control information, and the method can be executed by a sending device. The method includes:

Determining the number of bits of the second control information;

The second time-frequency resource is determined in the first time-frequency resource according to the number of bits of the second control information, where the first time-frequency resource is the time-frequency resource indicated by the first control information, and the second time-frequency resource is The resource is used to carry the resource of the modulation symbol encoded by the second control information;

Sending the second control information on the second time-frequency resource.

In the embodiment of the present application, the sending device can determine the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information, so that the sending device can determine the second time-frequency resource in the first time-frequency resource. Sending the second control information, so that the sending device can realize data transmission according to the second control information, so that the sending device and the receiving device can realize data transmission according to the two-level control information (that is, the first control information and the second control information) to ensure communication Reliability.

In a possible design, the first control information and the second control information are located on the same time unit, and the time unit may be a time slot, a subframe, a radio frame, a transmission time interval, or a mini time slot.

Further, the time domain position of the second control information on the time unit is no earlier than the time domain position of the first control information on the time unit.

In this design, the time-domain positional relationship between the first control information and the second control information in the same time unit is clarified, so that the time-domain positional relationship of the sending device based on the first control information and the second control information is in the first time-frequency resource To determine the second time-frequency resource.

In a possible design, the specific implementation method for determining the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information may include: determining the number of bits of the first data that can be used for transmission The number of subcarriers of the second control information; determining the number of subcarriers based on the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information The number of modulation symbols encoded by the second control information; and the second time-frequency resource is determined from the first time-frequency resource according to the number of modulation symbols encoded by the second control information.

In this design, first determine the number of modulation symbols encoded by the second control information, and then further determine the second time-frequency resource in the first time-frequency resource based on the number of modulation symbols encoded by the second control information to ensure that the determined The second time-frequency resource can well meet the transmission requirement of the second control information.

In a possible design, the first parameter may be determined according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information; and , Determining a second parameter according to the number of subcarriers that can be used to transmit the second control information; finally determining that the minimum value of the first parameter and the second parameter is the encoded second control information Number of modulation symbols.

In this design, the first parameter is determined according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information. When the first parameter is used as the number of modulation symbols after the second control information is encoded, the transmission requirement of the second control information can be well met; and the second parameter is based on the number of subcarriers that can be used to transmit the second control information It is determined. Therefore, when the second parameter is used as the number of modulation symbols after the second control information is encoded, excessive occupation of the first time-frequency resource by the second control information can be avoided. The number of modulation symbols after encoding the second control information finally determined in this embodiment is the smallest one of the first parameter and the second parameter. Therefore, the second control information transmission requirement can be taken into consideration while avoiding the second parameter. The excessive occupation of the first time-frequency resource by the control information further improves the reliability of communication.

In a possible design, it may be based on the first adjustment factor and the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information, A first parameter is determined, wherein the first adjustment factor is related to the second control information, and the first adjustment factor is a positive real number greater than or equal to 1.

In this design, when determining the first parameter, the first adjustment factor is introduced. Since the first adjustment factor is a positive real number greater than or equal to 1, it is equivalent to amplifying the requirement of the second control information for the number of encoded modulation symbols. Therefore, it can be better ensured that the finally determined number of modulation symbols after encoding of the second control information can meet the transmission requirement of the second control information.

In a possible design, in order to improve the flexibility of the solution, the first adjustment factor may be indicated through the first control information.

In a possible design, the first parameter satisfies the following relationship:

Wherein, Q1 represents the first parameter, f represents a function related to the number of bits of the second control information, h represents the number of bits of the first data, and g represents the number of bits that can be used to transmit the second control information. The number of information subcarriers;

Wherein, the function f related to the number of bits of the second control information satisfies:

among them,

Represents the first adjustment factor, O _SCI2 represents the number of bits of the second control information, L _SCI2 is the length of the cyclic redundancy check CRC bit of the second control information; s represents the first adjustment factor, O _SCI2 (s) represents the number of bits of the second control information determined based on the transmission mode of the first data,

Represents the first adjustment factor determined based on the transmission mode of the first data.

In this design, the calculation method of the first parameter is clarified, and the value of the calculation parameter of the first parameter (for example, the first adjustment factor) can be related to the transmission method of the first data, so that the encoded second control information is The number of modulation symbols can be related to the transmission mode of the first data. In the end, different first parameter value strategies can be realized under different transmission modes, so that the final modulation symbol number after encoding the second control information is more accurate and reliable. .

In a possible design, the second parameter may be determined according to the second adjustment factor and the number of subcarriers that can be used to transmit the second control information, where the second adjustment factor and the second control information Related, the second adjustment factor is a positive real number greater than 0 and less than or equal to 1.

In this design, when determining the second parameter, a second adjustment factor is introduced. Since the second adjustment factor is a positive real number greater than 0 and less than or equal to 1, the second control information has an upper limit on the number of encoded modulation symbols. It does not exceed the number of subcarriers that can be used to transmit the second control information, effectively avoiding the excessive use of the second control information on the first time-frequency resource.

In a possible design, in order to improve the flexibility of the solution, the second adjustment factor may be indicated through the first control information.

In a possible design, the second parameter satisfies the following relationship:

or

Wherein, Q2 represents the second parameter, g represents the number of subcarriers that can be used to transmit the second control information, s represents the second adjustment factor, α represents the second adjustment factor; W represents all The number of subcarriers used to transmit designated information on the first time-frequency resource.

In this design, the calculation method of the second parameter is clarified, and the value of the calculation parameter of the second parameter (for example, the second adjustment factor) can be related to the transmission method of the first data, so that the second control information is encoded The number of modulation symbols can be related to the transmission mode of the first data. In the end, different second parameter value strategies can be realized under different transmission modes, so that the finally determined number of modulation symbols after encoding the second control information is more accurate and reliable. .

In a possible design, the second control information may indicate that the transmission mode of the first data is unicast, multicast, or broadcast.

In this design, in the unicast, multicast, and broadcast transmission modes, the second control information can have different time-frequency resource determination strategies, which further improves the flexibility and reliability of communication.

In a possible design, the first time-frequency resource does not include at least one of the following:

A subcarrier on the first orthogonal frequency division multiplexing OFDM symbol used to transmit the first data channel on the first time unit;

The subcarrier on the last OFDM symbol on the first time unit;

The subcarriers on the OFDM symbols occupied by the feedback information on the first time unit;

The subcarrier on the first OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier number on the first OFDM symbol after the OFDM symbol where the feedback information is located on the first time unit;

Subcarriers occupied by the demodulation reference signal of the first control information;

Subcarriers occupied by the demodulation reference signal of the first data channel;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal;

The subcarrier occupied by the first control information.

In this design, before the second time-frequency resource is determined from the first time-frequency resource, the number of subcarriers that need to be occupied by preset information (such as AGC, GP, PSFCH, etc.) is first excluded, thereby avoiding the second control information pairing These information resources are occupied to further ensure the reliability of data transmission.

In a possible design, the time-frequency resource determined according to the second parameter does not include at least one of the following:

The subcarrier on the first OFDM symbol used to transmit the first data channel in the first time unit;

The subcarrier on the last OFDM symbol on the first time unit;

The subcarrier on the first OFDM symbol after the OFDM symbol where the feedback information is located on the first time unit;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal; subcarriers occupied by the first control information.

In this design, when calculating the first parameter, the number of subcarriers that the preset information (such as AGC, GP, PSFCH, etc.) needs to be occupied is first excluded, thereby avoiding the second control information from occupying the resources of these information, and further ensuring data transmission Reliability.

In a possible design, the first control information is the first side uplink control information SCI, the second control information is the second SCI, and the first time-frequency resource is the physical side uplink shared channel PSSCH resources.

In this design, the resource determination strategy of the second SCI in the side-line transmission scenario is clarified, so as to ensure the reliable transmission of the side-line data scheduled through the two-level SCI.

In the second aspect, an embodiment of the present application provides a method for receiving control information, which may be executed by a receiving device. The method includes: determining the number of bits of second control information; determining a second time-frequency resource in a first time-frequency resource according to the number of bits of the second control information, wherein the first time-frequency resource is a first control The time-frequency resource indicated by the information, where the second time-frequency resource is used to carry the resource of the modulation symbol encoded by the second control information; and the second control information is received on the second time-frequency resource.

In a possible design, the first control information and the second control information are located on the same time unit; the time domain position of the second control information on the time unit is not earlier than the first control information The time domain position of the information on the time unit.

In a possible design, determining the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information includes: determining the number of bits of the first data that can be used to transmit the second control information The number of subcarriers of information; the second control information is determined according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information The number of coded modulation symbols; according to the number of coded modulation symbols of the second control information, a second time-frequency resource is determined from the first time-frequency resource.

In a possible design, the second control information is determined according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information. The number of modulation symbols after information encoding includes: determining the first parameter according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information ; Determine the second parameter according to the number of subcarriers that can be used to transmit the second control information; determine that the minimum value of the first parameter and the second parameter is the modulation after the second control information is encoded Symbol number.

In a possible design, determining the first parameter according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information includes: The first parameter is determined according to the first adjustment factor and the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information, wherein the The first adjustment factor is related to the second control information, and the first adjustment factor is a positive real number greater than or equal to 1.

In a possible design, the first adjustment factor is indicated through the first control information.

In a possible design, the first parameter satisfies the following relationship:

or

among them,

In a possible design, determining the second parameter according to the number of subcarriers that can be used to transmit the second control information includes: according to a second adjustment factor and the number of subcarriers that can be used to transmit the second control information The number of subcarriers determines a second parameter, where the second adjustment factor is related to the second control information, and the second adjustment factor is a positive real number greater than 0 and less than or equal to 1.

In a possible design, the second adjustment factor is indicated through the first control information.

or

In a possible design, the second control information indicates that the transmission mode of the first data is unicast, multicast, or broadcast.

The subcarrier on the last OFDM symbol on the first time unit;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal;

The subcarrier occupied by the first control information.

The subcarrier on the last OFDM symbol on the first time unit;

Sub-carriers occupied by the phase tracking reference signal; sub-carriers occupied by the channel state information reference signal;

The subcarrier occupied by the first control information.

In the third aspect, an embodiment of the present application provides a communication device. The communication device has the function of realizing the sending device in the above method design. These functions 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.

In a possible design, the specific structure of the communication device may include a processing unit and a sending unit;

The processing unit is configured to: determine the number of bits of the second control information; determine the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information, where the first time-frequency resource is The time-frequency resource indicated by the first control information, where the second time-frequency resource is used to carry the resource of the modulation symbol encoded by the second control information;

The sending unit is configured to send the second control information on the second time-frequency resource.

In a possible design, when the processing unit determines the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information, it is specifically configured to: determine the number of bits of the first data, The number of subcarriers used to transmit the second control information; according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information , Determine the number of modulation symbols encoded by the second control information; determine a second time-frequency resource in the first time-frequency resource according to the number of modulation symbols encoded by the second control information.

In a possible design, the processing unit determines according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information. The number of modulation symbols encoded by the second control information is specifically used to: according to the number of bits of the first data, the number of bits of the second control information, and the number of bits that can be used to transmit the second control information Determine the first parameter according to the number of subcarriers in the second control information; determine the second parameter according to the number of subcarriers that can be used to transmit the second control information; determine that the minimum value of the first parameter and the second parameter is The number of modulation symbols after the second control information is coded.

In a possible design, the processing unit determines the first data according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information. A parameter is specifically used for: according to the first adjustment factor and the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information, A first parameter is determined, wherein the first adjustment factor is related to the second control information, and the first adjustment factor is a positive real number greater than or equal to 1.

In a possible design, the processing unit is further configured to indicate the first adjustment factor through the first control information.

In a possible design, the first parameter satisfies the following relationship:

among them,

In a possible design, when the processing unit determines the second parameter according to the number of subcarriers that can be used to transmit the second control information, it is specifically configured to: according to the second adjustment factor and the number of subcarriers that can be used The number of subcarriers for transmitting the second control information is determined, and a second parameter is determined, wherein the second adjustment factor is related to the second control information, and the second adjustment factor is a positive value greater than 0 and less than or equal to 1. Real number.

In a possible design, the processing unit is further configured to indicate the second adjustment factor through the first control information.

or

Where J represents the second parameter, g represents the number of subcarriers that can be used to transmit the second control information, s represents the second adjustment factor, α represents the second adjustment factor; W represents all The number of subcarriers used to transmit designated information on the first time-frequency resource.

In a possible design, the first time-frequency resource does not include at least one of the following: the first time unit on the first orthogonal frequency division multiplexing OFDM symbol used to transmit the first data channel. Carrier; the subcarrier on the last OFDM symbol on the first time unit; the subcarrier on the OFDM symbol occupied by the feedback information on the first time unit; the OFDM symbol where the feedback information on the first time unit is located The subcarrier on the previous first OFDM symbol; the subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information on the first time unit is located; the OFDM symbol on the first time unit where the feedback information is located Subcarrier number on the first OFDM symbol afterwards; subcarrier occupied by the demodulation reference signal of the first control information; subcarrier occupied by the demodulation reference signal of the first data channel; occupied by the phase tracking reference signal Sub-carriers of; sub-carriers occupied by the channel state information reference signal; sub-carriers occupied by the first control information.

In a possible design, the time-frequency resource determined by the processing unit according to the second parameter does not include at least one of the following: on the first time unit used to transmit the first OFDM symbol of the first data channel The subcarrier on the last OFDM symbol on the first time unit; the subcarrier on the OFDM symbol occupied by the feedback information on the first time unit; the subcarrier on the OFDM symbol on the first time unit where the feedback information is located The subcarrier on the first OFDM symbol before the OFDM symbol; the subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information on the first time unit is located; the subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information on the first time unit is located; The subcarrier on the first OFDM symbol after the OFDM symbol; the subcarrier occupied by the demodulation reference signal of the first control information; the subcarrier occupied by the demodulation reference signal of the first data channel; the phase tracking reference signal Occupied subcarriers; subcarriers occupied by the channel state information reference signal; subcarriers occupied by the first control information.

In a fourth aspect, an embodiment of the present application provides a communication device. The communication device has the function of realizing the receiving device in the above method design. These functions 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.

For example, the specific structure of the communication device may include a processing unit and a receiving unit;

The receiving unit is configured to receive the second control information on the second time-frequency resource.

In a possible design, the first parameter satisfies the following relationship:

or

among them,

or

In a fifth aspect, an embodiment of the present application provides a communication device. The communication device includes a transmitter and a processor. The processor and the transmitter are coupled, for example, connected via a bus. Wherein, the processor and the transmitter can cooperate to execute the method executed by the transmitting device in the first aspect or any one of the possible designs of the first aspect.

In a sixth aspect, an embodiment of the present application provides a communication device. The communication device includes a receiver and a processor. The processor and the receiver are coupled, for example, connected via a bus. Wherein, the processor and the receiver can cooperate to execute the method executed by the receiving device in the second aspect or any one of the possible designs of the second aspect.

In a seventh aspect, an embodiment of the present application provides a communication device including a processor and a memory; the memory is used to store computer-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, so that the The communication device executes the method executed by the sending device in the foregoing first aspect or any one of the possible designs of the first aspect.

In an eighth aspect, an embodiment of the present application provides a communication device including a processor and a memory; the memory is used to store computer-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, so that the The communication device executes the method executed by the receiving device in the above-mentioned second aspect or any one of the possible designs of the second aspect.

In a ninth aspect, the implementation of this application provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to execute such as The method executed by the sending device in the foregoing first aspect or any one of the possible designs of the first aspect.

In a tenth aspect, the implementation of this application provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to execute such as The method executed by the receiving device in the foregoing second aspect or any one of the possible designs of the second aspect.

In an eleventh aspect, an embodiment of the present application provides a readable storage medium, the readable storage medium is used to store instructions, and when the instructions are executed, the first aspect or any one of the first aspects is The method implemented by the sending device in a possible design is implemented.

In a twelfth aspect, an embodiment of the present application provides a readable storage medium, the readable storage medium is used to store instructions, and when the instructions are executed, the second aspect or any one of the second aspects described above The method performed by the receiving device in a possible design is implemented.

In a thirteenth aspect, an embodiment of the present application provides a chip, which is coupled to a memory, and is used to read and execute program instructions stored in the memory to implement any one of the above-mentioned first aspect or the first aspect Possible design methods provided.

In a fourteenth aspect, an embodiment of the present application provides a chip, which is coupled with a memory, and is used to read and execute program instructions stored in the memory to implement any one of the above-mentioned second aspect or the second aspect Possible design methods provided.

In a fifteenth aspect, a computer program product containing instructions is provided. The computer program product stores instructions that, when run on a computer, enable the computer to execute any one of the above-mentioned first aspect or the first aspect. The method provided by the design.

In a sixteenth aspect, a computer program product containing instructions is provided. The computer program product stores instructions that, when run on a computer, enable the computer to execute any one of the above-mentioned second aspect or the second aspect. The method provided by the design.

In a seventeenth aspect, a communication system is provided, including a sending device and a receiving device, the sending device is configured to execute the method provided in the above-mentioned first aspect or any one of the possible designs of the first aspect, the receiving device It is used to implement the method provided in the above-mentioned second aspect or any one of the possible designs of the second aspect.

In the embodiment of the present application, in the scenario of two-level control information scheduling data, the method for the sending device to determine the transmission resource of the second control information and the method for the receiving device to determine the transmission resource of the second control information, so that the sending device and the receiving device The device can realize data transmission according to the second control information to ensure the reliability of communication.

Description of the drawings

FIG. 1 is a schematic diagram of a wireless communication system network architecture provided by an embodiment of this application;

2 is a schematic diagram of another wireless communication system network architecture provided by an embodiment of the application;

FIG. 3 is a schematic diagram of another wireless communication system network architecture provided by an embodiment of this application;

FIG. 4 is a flowchart of a method for sending control information according to an embodiment of the application;

5A, 5B, 5C, and 5D are schematic diagrams of the first time-frequency resource;

FIG. 6 is a flowchart of a method for receiving control information according to an embodiment of the application;

FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 11 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 12 is a schematic structural diagram of another communication device provided by an embodiment of this application.

Detailed ways

Currently, mobile communication technology supports data scheduling through two-level control information. It should be understood that the control information may be downlink control information (DCI), uplink control information (UCI), or sidelink control information (SCI), etc. .

Take SCI as an example. During the discussion of NR-V2X, 3GPP is currently discussing the way in which two-level SCI and data are sent together. However, the current standard does not determine how to determine the transmission resources of the second level SCI. If the transmission resources of the second-level SCI cannot be effectively determined, the transmitter (or the sending device) does not know how to send, and the receiver (or the receiving device) does not know the corresponding reception. The communication link of the entire sidewalk cannot be established.

In view of this, the embodiments of the present application provide a control information sending method, receiving method, and communication device, which can be applied to various communication systems and used to determine the transmission resource of the second-level control information in the two-level control information so as to send equipment Data transmission is realized between the receiving device and the receiving device according to the two-level control information.

Hereinafter, some terms in the embodiments of the present application will be explained to facilitate the understanding of those skilled in the art.

1) Terminal devices, including devices that provide users with voice and/or data connectivity, such as handheld devices with wireless connection functions, or processing devices connected to wireless modems. The device can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN. The equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote station (remote station), access point (access point, AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), or user equipment (user device) and so on. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, handheld, computer-built mobile devices, smart wearable devices, and so on. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants, PDA), and other equipment. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.

As an example and not a limitation, in the embodiments of the present application, the device may also be a wearable device or the like. Wearable devices can also be called wearable smart devices. It is a general term for using wearable technology to intelligently design everyday wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The various terminal devices described above, if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be regarded as vehicle-mounted terminal equipment, for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU). ); if it is located on a roadside terminal device (for example, placed in a roadside unit or installed in a roadside unit), it can be regarded as a roadside terminal device. The roadside terminal device is also called a roadside unit (Road Side Unit, RSU). The terminal device of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit built into a vehicle as one or more components or units. The vehicle passes through the built-in vehicle-mounted module, vehicle-mounted module, On-board components, on-board chips, or on-board units can implement the method of the present application.

2) Network equipment, including access network (AN) equipment, such as a base station (e.g., access point), may refer to equipment that communicates with wireless terminal equipment through one or more cells over an air interface in an access network, Or, for example, a network device in a V2X technology is a roadside unit (RSU). The base station can be used to convert received air frames and Internet Protocol (IP) packets into each other, and act as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network. 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. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the next generation node B (gNB) in the 5G NR system, or it can also include the centralized unit (CU) and distributed unit in the cloud radio access network (CloudRAN) system. A distributed unit (DU) is not limited in the embodiment of the present application.

3) The transmitter, also called the transmitting device, corresponds to the receiver. The transmitter is used to transmit information, such as data packets, control information, and instruction information.

4) A receiver, also called a receiving device, corresponds to a transmitter. The receiver is used to receive the information sent by the transmitter. The receiver can also send feedback information to the transmitter. That is to say, a device can be both a transmitter and a transmitter. Can be used as a receiver.

5) Transmission link, including the side link between two devices, and the uplink and downlink between the terminal device and the network device, etc.

6) Sidelink (SL), mainly refers to the link established between devices of the same type, and can also be called side link, secondary link or auxiliary link, etc. This name is not used in the embodiments of this application. limited. The equipment of the same type can be a link between a terminal device and a terminal device, a link between a base station and a base station, or a link between a relay node and a relay node, etc. The implementation of this application The example does not limit this. V2X technology is an application of D2D technology in the Internet of Vehicles, or V2X is a specific D2D or sidelink technology. In a V2X scenario, the side link is a direct link connection between two V2X terminals, and the V2X terminal is a terminal with a V2X function, such as the same type of equipment described above.

7) SL transmission, the data transmission of two V2X terminals on the side link is called SL transmission.

Before the two V2X terminals perform SL transmission, a side link connection can be established. For example, the V2X terminal as the initiator sends a request to establish a side link connection to a network device. If the network device agrees to the V2X terminal to establish a side link connection, it will send configuration information for establishing a side link connection to the V2X terminal. , The V2X terminal establishes a side link connection with another V2X terminal according to the configuration information sent by the network device.

Time domain resources, including time units, time units can be slots, mini-slots, symbols or other time domain granularities (such as system frames, subframes), one of which can be It includes at least one symbol, for example, 14 symbols, or 12 symbols. This application uses a time slot as an example for description, but it is not limited to the implementation of the time slot.

In 5G NR, a time slot can be composed of at least one of symbols used for downlink transmission, flexible symbols, and symbols used for uplink transmission. The composition of such a time slot is called a different slot format (slot format). format, SF), there may be up to 256 timeslot formats.

Timeslots can have different timeslot types, and different timeslot types include different numbers of symbols. For example, a mini slot contains less than 7 symbols, 2 symbols, 3 symbols, 4 symbols, etc. Ordinary time slot (slot) contains 7 symbols or 14 symbols and so on. Depending on the subcarrier spacing, the length of each symbol can be different, so the length of the slot can be different.

Sub-carrier spacing (SCS) is the spacing value between the center positions or peak positions of two adjacent sub-carriers in the frequency domain in the OFDM system. In 5G NR, a variety of subcarrier spacings are introduced, and different carriers can have different subcarrier spacings. The baseline is 15kHz, which can be 15kHz×2n, and n is an integer, ranging from 3.75, 7.5 to 480kHz. For example, regarding the subcarrier spacing, refer to the following Table 1:

Table 1

μμ	Δf＝2 ^μ·15[kHz] Δf=2 ^μ ·15[kHz]
00	1515
11	3030
22	6060
33	120120
44	240240

Among them, μ is used to indicate the sub-carrier spacing. For example, when μ=0, the sub-carrier spacing is 15 kHz, and when μ=1, the sub-carrier spacing is 30 kHz. The length of a time slot corresponding to different subcarrier intervals is different. The length of a time slot corresponding to the subcarrier interval of 15kHz is 0.5ms, the length of a time slot corresponding to the subcarrier interval of 60kHz is 0.125ms, etc. . Correspondingly, the length of a symbol corresponding to different subcarrier intervals is also different.

In the frequency domain, since the 5G NR single carrier bandwidth can reach 400MHz, a bandwidth part (BWP) is defined in a carrier, which can also be called a carrier bandwidth part (carrier bandwidth part). The BWP includes several consecutive resource units in the frequency domain, such as a resource block (resource block, RB). The bandwidth part may be a downlink or uplink bandwidth part, and the terminal device receives or sends data on the data channel in the activated bandwidth part.

Frequency domain resources include sub-channels, bands, carriers, bandwidth parts (Band Width Part, BWP), resource blocks (Resource Block, RB), or resource pools, etc.

A subchannel is the smallest unit of frequency domain resources occupied by a physical side-line shared channel, and a subchannel may include one or more resource blocks (RB). The bandwidth of the wireless communication system in the frequency domain may include multiple RBs. For example, in each possible bandwidth of the LTE system, the included PRBs may be 6, 15, 25, 50, and so on. In the frequency domain, one RB can include several subcarriers. For example, in an LTE system, one RB includes 12 subcarriers, where each subcarrier interval can be 15kHz. Of course, other subcarrier intervals can also be used, such as 3.75kHz. , 30kHz, 60kHz or 120kHz sub-carrier spacing, there is no limitation here.

8) Vehicle to everything (V2X) is the interconnection between vehicles and the outside world. This is the foundation and key technology of future intelligent vehicles, autonomous driving, and intelligent transportation systems. V2X will optimize the specific application requirements of V2X on the basis of the existing D2D technology. It is necessary to further reduce the access delay of V2X devices and solve the problem of resource conflicts.

V2X specifically includes vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and There are several application requirements such as vehicle-to-network (V2N) communication and interaction. as shown in picture 2. V2V refers to the communication between vehicles; V2P refers to the communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers); V2I refers to the communication between vehicles and network equipment, such as RSU, and There is another type of V2N that can be included in V2I. V2N refers to the communication between the vehicle and the base station/network.

Among them, V2P can be used as a safety warning for pedestrians or non-motorized vehicles on the road. Through V2I, vehicles can communicate with roads and even other infrastructure, such as traffic lights, roadblocks, etc., to obtain road management information such as traffic light signal timing. V2V can be used for information interaction and reminding between vehicles, and the most typical application is for the anti-collision safety system between vehicles. V2N is currently the most widely used form of Internet of Vehicles. Its main function is to connect vehicles to a cloud server through a mobile network, and use the navigation, entertainment, or anti-theft application functions provided by the cloud server.

In V2X, it is mainly the communication between terminal equipment and terminal equipment. For the transmission mode between terminal equipment and terminal equipment, the current standard protocols support broadcast, multicast, and unicast.

Broadcast mode: The broadcast mode means that the terminal device as the sender uses broadcast mode to send data. Multiple terminal device ends can receive sidelink control information (SCI) or sidelink sharing from the sender Channel (sidelink shared channel, SSCH).

Multicast mode: The multicast mode is similar to broadcast transmission. The terminal equipment as the sender uses the broadcast mode for data transmission, and a group of terminal equipment can parse SCI or SSCH.

Unicast mode: The unicast mode is that one terminal device sends data to another terminal device, and other terminal devices do not need or cannot parse the data.

9) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .

And, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or order of multiple objects. Importance. For example, the first value and the second value are only for distinguishing different values, but do not indicate the difference in content, priority, or importance of the two values.

The "first level control information" in this article can also be called "first level scheduling signaling" or "first control information"; "second level control information" can also be called "second level scheduling" Signaling", or "Second Control Information". That is to say, the first-level control information", "first-level scheduling signaling", and "first-level control information" can be interchanged; the second-level control information", "second-level scheduling signaling", and "second control information" Information" can be interchanged.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as the fourth generation (4th Generation, 4G), 4G systems including LTE systems, and worldwide interoperability for microwave access (WiMAX) communication systems, Future 5th Generation (5G) systems, such as NR, and future communication systems, such as 6G systems. In addition, the technical solutions provided by the embodiments of the present application can be applied to a cellular link, and can also be applied to a link between devices, such as a device to device (D2D) link. The D2D link or the V2X link may also be referred to as a side link (SL), where the side link may also be referred to as a side link or a secondary link. In the embodiments of the present application, the aforementioned terms all refer to links established between devices of the same type, and have the same meaning. The so-called devices of the same type can be the link between the terminal device and the terminal device, the link between the base station and the base station, and the link between the relay node and the relay node. This application The embodiment does not limit this. For the link between the terminal device and the terminal device, there are D2D links defined by 3GPP version (Rel)-12/13, and there are also car-to-car, car-to-mobile, or car-to-any entity defined by 3GPP for the Internet of Vehicles. V2X link, including Rel-14/15. It also includes the V2X link based on the NR system of Rel-16 and subsequent versions that are currently being studied by 3GPP.

The technical solutions of the embodiments of the present application can also be applied to systems such as V2X, LTE-V, V2V, Internet of Vehicles, MTC, IoT, LTE-M, and M2M.

The communication system in the embodiment of the present application may include a sending device and a receiving device, where the sending device may perform data scheduling of the receiving device through two-level control information (or two-level scheduling signaling). Specifically, the sending device can schedule data through first-level control information (or first-level scheduling signaling) and second-level control information (or second-level scheduling signaling). Data sent by the device and/or data sent by the receiving device to the sending device.

Among them, the first-level control information can be used to carry information used for channel detection or resource selection, so that the receiving device can know which transmission resources are available for data transmission, such as data priority, reference signal pattern, and data transmission time. Frequency resources, time-frequency resources reserved for transmission, etc. The second level of control information can be used to carry data scheduling information for receiving and demodulating data at the receiving end. Data scheduling information such as hybrid automatic repeat request (HARQ) information, such as the process number of the HARQ process , Retransmission/new transmission identification, etc.

It should be understood that the communication system in the embodiments of the present application can be applied to both low-frequency scenarios (sub 6G) and high-frequency scenarios (above6G). The application scenarios of wireless communication systems include but are not limited to long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD), general mobile communications System (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (WiMAX) communication system, future fifth-generation system, new radio (NR) communication system, or future evolved public Land mobile network (public land mobile network, PLMN) system, etc.

Further, the above sending device uses two levels of control information to perform data scheduling of the receiving device, which may be scheduling of downlink data, scheduling of uplink data, or scheduling of sideline data. Correspondingly, the above-mentioned control information can be downlink control information (DCI), uplink control information (UCI), or side link control information (sidelinik control information, SCI), etc. .

Please refer to FIG. 1, which is a schematic diagram of a wireless communication system network architecture provided by an embodiment of this application.

As shown in FIG. 1, the wireless communication system may include a terminal device 101 and a network device 102. Among them, the network device 102 can be used as a sending device, and the terminal device 101 can be used as a receiving device; alternatively, the network device 102 can be used as a receiving device, and the terminal device 101 can be used as a sending device.

In the wireless communication system shown in FIG. 1, the network device 102 can schedule data of the terminal device 101 through the first-level control information and the second-level control information. Among them, the first-level control information may be the first-level downlink control information (downlink control information, DCI) or the first-level uplink control information (uplink control information, UCI), and the second-level control information may be the second-level DCI or the first-level uplink control information. Level 2 UCI. The first level DCI and the second level DCI can be used to schedule downlink data sent by the network device 102 to the terminal device 101, and the downlink data can be carried on a physical downlink shared channel (PDSCH). The first level UCI and the second level UCI can be used to schedule downlink data sent from the terminal device 101 to the network device 102, and the downlink data can be carried on a physical uplink shared channel (PUSCH).

Please refer to FIG. 2, which is a schematic diagram of another wireless communication system network architecture provided by an embodiment of this application.

As shown in FIG. 2, the wireless communication system may include a terminal 103 and a terminal 104, and sidelink (SL) communication may be performed between the terminal 103 and the terminal 104. Among them, the terminal 103 can be used as a sending device, and the terminal 104 can be used as a receiving device. Alternatively, the terminal 104 may be used as a sending device, and the terminal 103 may be used as a receiving device.

In the wireless communication system shown in FIG. 2, the terminal 103 can schedule data of the terminal 104 through the first-level control information and the second-level control information. Among them, the first-level control information may be a first-level SCI, and the second-level control information may be a second SCI. The first-level SCI and the second-level SCI may be used to schedule the terminal 103 to send to the terminal 104. The data at and/or is used to schedule the data sent from the terminal 104 to the terminal 103. The data transmitted between the terminal 103 and the terminal 104 may be carried on a physical sidelink shared channel (PSSCH).

The terminal 103 and the terminal 104 may be user equipment, terminal, RSU, access terminal, terminal unit, terminal station, mobile station, remote station, remote terminal, mobile terminal, wireless communication equipment, terminal agent or terminal equipment, etc., specifically Refer to the description of the terminal device 101 above.

Exemplarily, the terminal 103 can also access the access network device, so that the access network device can configure the SL link between the terminal 103 and the terminal 104, and the SL link is used for the SL communication between the terminal 103 and the terminal 104 . The access network device may be a device such as a RAN base station. For details, refer to the description of the network device 102 above. It should be understood that the terminal 104 can access the access network device shown in FIG. 2 or access other access network devices not shown in FIG. 2.

Please refer to FIG. 3, which is a schematic diagram of another wireless communication system network architecture provided by an embodiment of this application.

As shown in Figure 3, the wireless communication system includes: multiple vehicle-mounted devices (UE1, UE2, UE3 as shown in Figure 3), which can communicate with each other; one or more RSUs, which can communicate with each vehicle-mounted device and /Or eNB for communication; one or more LTE base station equipment (eNB), which can communicate with each vehicle-mounted equipment and/or RSU; one or more NR base station equipment (gNB), which can communicate with each vehicle-mounted equipment and/or RSU communicates; one or more global navigation satellite systems (Global Navigation Satellite System, GNSS), which can provide positioning and timing information for other network elements in the general information system. The vehicle-mounted equipment can move with the vehicle at a high speed, for example, when UE1 and UE2 move relative to each other, they have the maximum relative moving speed.

It should be understood that the various devices shown in FIG. 3 can communicate with each other, and the spectrum of the cellular link can be used for communication, and the intelligent traffic spectrum around 5.9 GHz can also be used. The technology for each device to communicate with each other can be enhanced based on the LTE protocol, or it can be enhanced based on the D2D technology. When any two devices in the system shown in FIG. 3 communicate, the first-level control information and the second-level control information can be used to schedule data between the two devices.

For example, the first-level DCI and the second-level DCI can be used to schedule the downlink data sent by the gNB/eNB/RSU to UE1/UE2/UE3, and the downlink data can be carried on the PDSCH. For example, the first-level UCI and the second-level UCI can be used to schedule uplink data sent by UE1/UE2/UE3 to gNB/eNB/RSU, and the uplink data can be carried on the PUSCH. For example, UE1 can schedule the data of terminal UE2/UE3 through the first-level SCI and the second-level SCI. The data transmitted between UE1 and UE2/UE3 can be carried on the PSSCH.

It should be understood that in Figure 3, eNB and/or gNB are optional. When there is an eNB and/or gNB, it is a V2X scenario with network coverage, and if there is no eNB and/or gNB, it is a V2X scenario without network coverage.

Based on the above wireless communication system as shown in FIG. 1 or FIG. 2 or FIG. 3, an embodiment of the present application provides a control information sending method and a receiving method, which are used to determine the transmission resource of the second-level control information in the two-level control information. , In order to realize data transmission between the sending device and the receiving device according to the two-level control information.

It should be understood that the network architecture and business scenarios (or application scenarios) described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians can know that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

The following describes the method provided by the embodiment of the present invention with reference to the accompanying drawings.

Referring to FIG. 4, the control information sending method provided by the embodiment of the present application may include the following steps:

S401: The sending device determines the number of bits of the second-level control information.

S402. The sending device determines the second time-frequency resource in the first time-frequency resource according to the number of bits of the second-level control information, where the first time-frequency resource is the time-frequency resource indicated by the first-level control information. The second time-frequency resource is used to carry the resource of the modulation symbol encoded by the second-level control information;

S403. The sending device sends the second-level control information on the second time-frequency resource.

Wherein, the sending device may be any one of the above-mentioned FIG. 1, FIG. 2, and FIG. 3, and there is no limitation here.

The first-level control information may be a first-level SCI, the second-level control information may be a second-level SCI, and the first time-frequency resource may be a PSSCH resource; or, the first-level control information may be a first-level SCI. First-level DCI, the second-level control information may be second-level DCI, and the first time-frequency resource may be PDSCH resource; or, the first-level control information may be first-level UCI, and the second level The level control information may be a second level UCI, and the first time-frequency resource may be a PUSCH resource, which is not specifically limited in the embodiment of the present application.

In order to facilitate the description of the technical solution of the present application, in the following embodiments, the side-line transmission scenario is mainly taken as an example, that is, the first-level control information is the first-level SCI, the second-level control information is the second-level SCI, and the first The time-frequency resources are PSSCH resources.

In the embodiment of the present application, the first-level control information and the second-level control information are located on the same time unit (for ease of description, the same time unit where the two levels of SCI are located is called the first time unit), and The time domain position of the second level control information on the first time unit is no earlier than the time domain position of the first level control information on the first time unit. The time domain length of the first time-frequency resource may be the length of the first time unit.

It should be understood that the time unit here can be a slot, a subframe, a radio frame, a transmission time interval (TTI), or a mini-slot (the shortest can be only 1 orthogonal frequency division multiplexing). Use (orthogonal frequency division multiplexing, OFDM) symbols), etc., which are not specifically limited in the embodiment of the present application. The following mainly takes the time slot of 10ms in the time unit of 5G and NR as an example.

Referring to Figure 5A, it is an example of a positional relationship between two levels of SCI in the same time slot (for ease of description, the same time slot in which the two levels of SCI are located is referred to as the first time slot). The largest rectangular box in Figure 5A represents the first time slot. The PSSCH resource in the time slot (or the first time-frequency resource), the PSSCH in the SCI-1 time slot includes PSSCH-1 and PSSCH-2, and the time domain position of PSSCH-1 is earlier than that of PSSCH-2 Time domain position, SCI-1 is carried on PSSCH-1, SCI-2 is carried on PSSCH-2, that is, the time domain position of SCI-1 in this time slot is earlier than the time domain position of SCI-2 in this time slot . Refer to Figure 5B, which is another example of the positional relationship between two levels of SCI in the same time slot. In the example shown in Figure 5B, the time domain positions of SCI-1 and SCI-2 are the same, or occupy the same OFDM symbol. .

It should be understood that the PSSCH in the first time-frequency resource can be used to carry other information in addition to carrying SCI-1, SCI-2, and data to be sent.

For example, referring to Figure 5C, the first OFDM symbol in the first time-frequency resource can be used as an automatic gain control (AGC) symbol, and the last symbol OFDM symbol is the guard period (guard period, GP) symbol (or called a null symbol).

Exemplarily, referring to FIG. 5C, the first time-frequency resource is also used for the AGC2 symbol of the physical sidelink feedback channel (pysical sidelink feedback channel, PSFCH), and the symbol before AGC2 for sending and receiving or sending and receiving conversion. GP1 null symbol, GP2 null symbol at the end of the slot. In addition, it may further include symbols used for demodulation reference signal (DMRS), symbols used for phase tracking reference signal (PT-RS), and symbols used for channel state information reference signal (channel state information reference signal, PT-RS). -state information reference signal, CSI-RS) symbols, etc., here are not examples.

The first control information includes a transmission parameter of the second control information and/or a first transmission parameter of the first data, and the second control information includes a second transmission parameter of the first data.

In the implementation of this application, the first data may refer to data to be transmitted on the first time-frequency resource. Exemplarily, the first data is a transmission block where the PSSCH to be sent in the first time slot is located. The first data may be pre-encoded or post-encoded, which is not limited in the embodiment of the present application. Optionally, the first data before encoding may or may not include CRC bits, which is not limited in the embodiment of the present application.

Further, the first level control information (SCI-1) may include one or more of the following information:

1) Priority (priority) information, for example: used to indicate the priority of the first data, used to indicate the level, size or range of the first data's importance, urgency, delay requirements, and reliability requirements;

2) Modulation and coding scheme (MCS), for example: used to indicate the MCS used when sending the first data and/or the second control information;

3) Demodulation reference signal (demodulation reference signal, DMRS) pattern (pattern), for example: used to indicate a predefined or pre-configured pattern in the DMRS pattern used when transmitting the first data and/or the second control information which type;

4) The type or format of SCI-2 (SCI-2 type or format), or the transmission method of the first data, for example: used to indicate the CRC mask used by SCI-2, the size of SCI-2, SCI-2 It is used to indicate which of the unicast, multicast or broadcast transmission of the first data is used;

5) The indication information of the time domain and frequency domain resource allocation (size and location) of the current data or the initial transmission or retransmission of the data, or the indication information of the reserved resources (for example: used to indicate the reserved resources for subsequent transmission Information);

6) The current transmission and the next transmission, or the indication information of the time interval between the currently transmitted data packet and the next data packet to be transmitted, or the indication information of the time interval between the initial transmission and the retransmission.

Of course, the above is only an example, and it may not be limited to this in practical application.

Further, the second level control information (SCI-1) may include one or more of the following types of information:

1), source identifier (source identifier) or physical layer source identifier;

2), the destination identifier or the destination identifier of the physical layer;

3) Process number of hybrid automatic repeat request (HARQ);

4) Retransmission or redundant version indication information;

5). Send the location indication information of the device;

6) The indication information of the required communication distance (required minimun communication distance), for example, can be used to indicate the minimum communication distance required for the first data transmission;

7) Indication or configuration information of the channel state information reference signal (channel state information-reference signal, CSI-RS).

In the following, a method for determining the second time-frequency resource in the first time-frequency resource according to the number of bits of the second-level control information (SCI-2) is introduced.

Optionally, the sending device may determine the second level according to the number of bits of the first data, the number of bits of the second level control information, and the number of subcarriers that can be used to transmit the second level control information. The number of coded modulation symbols after the level control information is coded (the number of coded modulation symbols) or the number of coded modulation symbols on each layer (the number of coded modulation symbols per layer). That is, the number of modulation symbols can be on each spatial layer, or on all spatial layers, or the total number of modulation symbols, which is not limited in the embodiment of the application; and then according to the second level control The number of modulation symbols after the information is encoded, and the second time-frequency resource is determined in the first time-frequency resource. Wherein, the resource occupied by the modulation symbol after the second control information is coded may be a resource element (RE) or subcarrier occupied by the modulation symbol after the second control information is coded.

For ease of description, the number of bits of the first data is denoted by h, and the number of subcarriers that can be used to transmit the second-level control information is denoted by g. The modulation after encoding the second-level control information The number of symbols is represented by _Q'SCI2 , and the number of bits of the second-level control information is represented by O _SCI2 . In addition, a function related to the number of bits of the second-level control information is designed, which is represented by f=F(O _SCI2 ). Then Q can be expressed as a function of f, h, g, that is: _Q'SCI2 = F(f, h, g).

In some possible designs, _{the method for the sending device to determine Q'SCI2} may specifically include: determining the first parameter according to f, h, g, and determining the second parameter according to g; and then determining the first parameter and the second parameter. The minimum value of is the number of modulation symbols after the second-level control information is encoded. For ease of description, in this article, the first parameter is represented by Q1, and the second parameter is represented by Q2, then _Q'SCI2 = F(f, h, g) can be further represented as:

_Q'SCI2 = min{Q1,Q2}.

The specific implementation manners of the first parameter Q1 and the second parameter Q2 are respectively introduced below.

1. Possible implementations of the first parameter Q1:

That is: Q1 is equal to

The value rounded down. Through the restriction of Q1, the finally determined number of modulation symbols after encoding of the second-level control information can meet the transmission requirements of the second-level control information, and ensure that the second-level control information can be completely transmitted.

Further, in order to better ensure the reliability of the transmission of the second-level control information, when calculating the number of encoded modulation symbols required by the second-level control information, a first adjustment factor may be set to adjust the second level. The number of coded modulation symbols required for level control information.

Wherein, the first adjustment factor is a positive real number greater than or equal to 1, which can ensure that the finally determined number of modulation symbols Q after encoding the second-level control information can meet the transmission requirements of the second-level control information .

As an optional implementation manner, the first adjustment factor can be designed in the function f, such as:

among them,

Represents the first adjustment factor, O _SCI2 represents the number of bits of the second-level control information, and L _SCI2 represents the length of the CRC bits of the second-level control information.

The first adjustment factor may be indicated by the first-level control information, or may be configured or pre-configured on the resource pool for transmitting the first data channel, which is not limited in the embodiment of the present application.

In a possible design, the first adjustment factor may be a fixed value, such as 1.1, 1.5, or 1.6.

In another possible design, the first adjustment factor may be related to the content of the second-level control information or the transmission mode of the first data. For example, the second-level control information may indicate a transmission mode of the first data, where the transmission mode includes unicast, multicast, or broadcast. Then, corresponding to different transmission modes of the first data, the value of the first adjustment factor β may be different. Optionally, the first adjustment factor is less than or equal to 8.

Then the function f can also be expressed as:

Among them, s represents the transmission type of the first data, including unicast, multicast, or broadcast.

For example, each transmission method may be associated with a first adjustment factor. For example, the first adjustment factor corresponding to unicast is 1.2, the first adjustment factor corresponding to multicast is 1.1, and the first adjustment factor corresponding to broadcast is 1.2. The value is 1.5.

For another example, each transmission method can also be associated with a value set of the first adjustment factor, and different types of transmission methods can be associated with different value sets of the first parameter, which can be correlated from the transmission method of the first data. Select a value in the value set as the value of the first adjustment factor. For example, the following table is an example of the value set associated with unicast, multicast, and broadcast. Optionally, each transmission mode may also be associated with a value set of the first constraint factor, which may be configured through signaling or pre-configured.

第一数据的传输方式Transmission method of the first data	第一调整因子First adjustment factor
广播broadcast	3，4，53, 4, 5
单播Unicast	1.2，1.5，1.8，21.2, 1.5, 1.8, 2
组播 Multicast	2，2.5，32, 2.5, 3

Further, in the embodiment of the present application, if the transmission mode of the first data is different, the bit size corresponding to the second control information may be different, the CRC mask corresponding to the second control information may be different, or the control channel corresponding to the second control information The format can be different. Then, the function f can also be expressed as:

The calculation method of f is described above, and the calculation method of the number of bits h of the first data is described below:

The first possible calculation method for the number of bits h of the first data:

Among them, K _r represents the size of the r-th code block (Code Block, CB) in the _{first data, and C SL-SCH} represents the total number of code blocks in the first data.

The second possible calculation method for the number of bits h of the first data:

h=K _TB ;

Wherein, represents the size (number of bits) of the transmission block (TB) of the first data.

The third possible calculation method for the number of bits h of the first data:

h=R·Q _m ;

Wherein, R represents the code rate of the transmission block of the first data, and Q _m represents the modulation order of the first data.

The following describes the calculation method of the number g of subcarriers that can be used to transmit the second-level control information on the first time-frequency resource:

The first possible calculation method of g:

among them,

Represents the total number of OFDM symbols on the first time-frequency resource,

Represents the number of subcarriers (or REs) that can be used to transmit the first data on the l-th OFDM symbol in the first time-frequency resource.

As an optional implementation manner, considering that in actual applications, other information may need to be transmitted on the first time-frequency resource, such as AGC, GP, PSFCH, etc. shown in FIG. 5C and FIG. 5D, in order to avoid second-level control Information occupies the resources of this information, so the number of subcarriers that need to be occupied by this information can be excluded first when calculating Q1.

The number of subcarriers to be excluded includes at least one of the following:

A subcarrier on the first OFDM symbol used to transmit the first data channel in the first time slot;

The subcarrier on the last OFDM symbol in the first time slot;

The subcarriers on the OFDM symbols occupied by the feedback information in the first time slot;

The subcarrier on the first OFDM symbol before the OFDM symbol where the feedback information is located in the first time slot;

The subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information is located in the first time slot;

The subcarrier number on the first OFDM symbol after the OFDM symbol where the feedback information is located on the first time slot;

Subcarriers occupied by the demodulation reference signal of the first-level control information;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal;

The subcarrier occupied by the first-level control information.

Wherein, the feedback information includes response information for correct or incorrect reception of received data; feedback information for indicating link signal quality, such as reference signal receiving power (RSRP), reference Signal receiving quality (reference signal receiving quality, RSRQ), signal to interference plus noise ratio (SINR), received signal strength indication (RSSI), etc.

Further, the number of subcarriers that need to be occupied by the information can be excluded first when calculating g.

Further, the second possible calculation method of g:

That is,

Can also be

Subtract P to generate, where,

It is the bandwidth for transmitting PSSCH data (that is, the first data), and the unit is RE or subcarrier, and P represents the number of subcarriers used to transmit designated information.

P can include at least one of the following:

On OFDM symbol 1, RE or subcarrier occupied by SCI-1;

On OFDM symbol 1, the RE or subcarrier occupied by the feedback information or feedback channel PSFCH;

On OFDM symbol 1, the first symbol at the front of the slot is used for AGC training of the entire slot data;

On OFDM symbol 1, the first symbol in the front of the feedback channel is used for AGC training of the feedback channel;

On the OFDM symbol 1, a null symbol used for data and/or SCI1, SCI2 transceiving or transmitting/receiving conversion;

On the OFDM symbol 1, a null symbol used for receiving and sending or sending and receiving conversion of the feedback channel;

On OFDM symbol 1, RE or subcarrier occupied by DMRS;

On OFDM symbol 1, RE or subcarrier occupied by PT-RS;

On OFDM symbol 1, RE or subcarrier occupied by CSI-RS.

Optionally, on the OFDM symbol with the DMRS, the symbol occupied by the PT-RS may not be removed; when the symbol with the PT-RS exists, the symbol occupied by the DMRS may not be removed.

2. Possible implementations of the second parameter Q2:

That is: Q2 is equal to the value rounded down to g×α. Among them, α is the second adjustment factor, which is usually a positive real number greater than 0 and not greater than 1, so that the finally determined number of modulation symbols Q after the second-level control information encoding does not exceed g.

According to the calculation method of g above, the above Q2 can also be expressed as:

Similar to the first adjustment factor, the second adjustment factor may be a fixed value, for example, a fixed value of 0.5, 0.7, or 0.8. The second adjustment factor may also be related to the second-level control information. For example, corresponding to different transmission modes (unicast, multicast or broadcast) of the first data, the value of the second adjustment factor may be different.

Then the second possible calculation method for Q2:

Among them, α(s) represents a second adjustment factor determined based on the transmission mode of the first data.

Similar to the first adjustment factor, the second adjustment factor may be indicated by the first-level control information, or may be configured on the resource pool for transmitting the first data channel, which is not limited in the embodiment of the present application.

Similar to the first adjustment factor, considering that in practical applications, other information may need to be transmitted on the first time-frequency resource, in order to avoid the second-level control information from occupying the resources of this information, these can be used when _{calculating Q 2} The number of sub-carriers that need to be occupied by the information is excluded first.

Similarly, the number of subcarriers to be excluded includes at least one of the following:

The subcarrier on the last OFDM symbol in the first time slot;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal;

The subcarrier occupied by the first-level control information.

Further, the third possible calculation method for _{Q 2 is:}

or

Wherein, W may include at least one of the following:

Q _SCI1 : The number of REs occupied by SCI-1 information (first-level control information) before or after encoding (including CRC), or the number of REs occupied by PSSCH-1 (PSSCH resources carrying SCI-1).

Q _PSFCH : the number of REs occupied by SCI1 information before or after SCI encoding (including CRC), or the number of REs occupied by the PSFCH currently used by the UE or all PSFCH resources configured by the system.

Q _AGC1 : All REs occupied by the AGC symbols of PSCCH-1 and PSSCH in the time slot.

Q _AGC2 : All REs occupied by the AGC symbols of the PSFCH in the time slot.

Q _GAP1 : After the symbols occupied by PSCCH-1 and PSSCH, all REs occupied by symbols used for receiving, sending, or receiving conversion. Or, before the symbols occupied by the PSFCH, all the REs occupied by the symbols used for transceiving or sending/receiving conversion.

Q _GAP2 : After the symbols occupied by the PSFCH, all the REs occupied by the symbols used for receiving, sending or receiving conversion.

It should be understood that on the OFDM symbol with the DMRS, the symbol occupied by the PT-RS may not be removed; when the symbol with the PT-RS, the symbol occupied by the DMRS may not be removed.

In addition, there is another design that does not consider the occupation of other transmission information resources by the second-level control information in the whole process of _{calculating Q′ SCI2} _{, but before calculating Q′ SCI2} , when determining the first time-frequency resource, First exclude this information. That is, the first time-frequency resource does not include at least one of the following:

The subcarrier on the last OFDM symbol in the first time slot;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal;

The subcarrier occupied by the first-level control information.

Each parameter in Q1 and Q2 is described in detail above. In specific implementation, the various implementation modes of each parameter in Q1 and Q2 can be combined or implemented in combination with each other to form a variety of second-level determinations. A scheme for controlling the number of modulation symbols after encoding the information. Here are some of the possible combinations:

Example 1:

If it is a scene including DMRS symbols, then

or,

If it is a scene that does not include DMRS symbols, then

Example 2:

Example 3:

Example 4:

or,

or,

Example 5:

Example 6:

Example 7:

Example 8:

_{Optionally, K TB} in any one of the above examples 1 to 8 can be replaced with R·Q _m or

The implementation of this application does not limit this.

Example 9:

Example 10:

The foregoing control information sending method provided in the embodiments of the present application provides a specific implementation method for the sending device to determine the transmission resource of the second-level control information in the scenario of two-level control information scheduling data, so that the sending device can be based on the second-level control information. The control information realizes the transmission of data and ensures the reliability of communication.

Based on the same technical concept, an embodiment of the present application also provides a method for receiving control information. Referring to FIG. 6, the method includes:

S601. The receiving device determines the number of bits of the second-level control information.

S602. The receiving device determines a second time-frequency resource in the first time-frequency resource according to the number of bits of the second-level control information, where the first time-frequency resource is the time-frequency resource indicated by the first-level control information, The second time-frequency resource is used to carry the resource of the modulation symbol encoded by the second-level control information;

S603. Receive the second level control information on the second time-frequency resource.

For the specific implementation method for the receiving device to determine the number of bits of the second-level control information in step S601, reference may be made to the specific implementation method for the sending device to determine the number of bits of the second-level control information in step S401. In step S602, the receiving device determines the number of bits for the second-level control information. The specific implementation method of determining the second time-frequency resource in the first time-frequency resource by the number of control information bits can refer to the above step S402. The sending device determines the second time-frequency resource in the first time-frequency resource according to the second-level control information bit number. The specific implementation method of the time-frequency resource will not be repeated here.

The foregoing control information receiving method provided by the embodiments of the present application provides a specific implementation method for the receiving device to determine the transmission resource of the second-level control information in the scenario of two-level control information scheduling data, so that the receiving device can be based on the second-level control information. The control information realizes the data reception and ensures the reliability of communication.

The following describes the device provided by the embodiment of the present invention with reference to the accompanying drawings.

Based on the same technical concept, an embodiment of the present application also provides a communication device, which has the function of implementing the sending device in the above method design. These functions 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.

For example, referring to FIG. 7, the specific structure of the communication device may include a processing unit 701 and a sending unit 702.

The processing unit 701 is configured to: determine the number of bits of the second control information; determine a second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information, where the first time-frequency resource Is the time-frequency resource indicated by the first control information, and the second time-frequency resource is used to carry the resource of the modulation symbol encoded by the second control information;

The sending unit 702 is configured to send the second control information on the second time-frequency resource.

In a possible design, when the processing unit 701 determines the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information, it is specifically configured to: determine the number of bits of the first data, The number of subcarriers that can be used to transmit the second control information; according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information Determine the number of modulation symbols encoded by the second control information; determine a second time-frequency resource in the first time-frequency resource according to the number of modulation symbols encoded by the second control information.

In a possible design, the processing unit 701 is based on the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information, When determining the number of modulation symbols encoded by the second control information, it is specifically used to: according to the number of bits of the first data, the number of bits of the second control information, and the number of bits that can be used to transmit the second control information The number of subcarriers of the information determines the first parameter; the second parameter is determined according to the number of subcarriers that can be used to transmit the second control information; the minimum value of the first parameter and the second parameter is determined to be The number of modulation symbols after the second control information is coded.

In a possible design, the processing unit 701 determines the number of subcarriers based on the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information. The first parameter is specifically used for: according to the first adjustment factor and the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information , Determine a first parameter, wherein the first adjustment factor is related to the second control information, and the first adjustment factor is a positive real number greater than or equal to 1.

In a possible design, the processing unit 701 is further configured to indicate the first adjustment factor through the first control information.

In a possible design, the first parameter satisfies the following relationship:

among them,

In a possible design, when the processing unit 701 determines the second parameter according to the number of subcarriers that can be used to transmit the second control information, it is specifically configured to: Determine a second parameter based on the number of subcarriers for transmitting the second control information, wherein the second adjustment factor is related to the second control information, and the second adjustment factor is greater than 0 and less than or equal to 1. Positive real number.

In a possible design, the processing unit 701 is further configured to indicate the second adjustment factor through the first control information.

or

In a possible design, the time-frequency resource determined by the processing unit 701 according to the second parameter does not include at least one of the following: the first OFDM symbol used to transmit the first data channel on the first time unit The sub-carrier on the first time unit; the sub-carrier on the last OFDM symbol on the first time unit; the sub-carrier on the OFDM symbol occupied by the feedback information on the first time unit; the location of the feedback information on the first time unit The subcarrier on the first OFDM symbol before the OFDM symbol; the subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information on the first time unit is located; the subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information on the first time unit is located; The subcarrier on the first OFDM symbol after the OFDM symbol; the subcarrier occupied by the demodulation reference signal of the first control information; the subcarrier occupied by the demodulation reference signal of the first data channel; the phase tracking reference Sub-carriers occupied by the signal; sub-carriers occupied by the channel state information reference signal; sub-carriers occupied by the first control information.

Based on the same technical concept, an embodiment of the present application also provides a communication device, which has the function of implementing the receiving device in the above method design. These functions 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.

For example, referring to FIG. 8, the specific structure of the communication device may include a processing unit 801 and a receiving unit 802.

The processing unit 801 is configured to: determine the number of bits of the second control information; determine the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information, where the first time-frequency resource Is the time-frequency resource indicated by the first control information, and the second time-frequency resource is used to carry the resource of the modulation symbol encoded by the second control information;

The receiving unit 802 is configured to receive the second control information on the second time-frequency resource.

In a possible design, when the processing unit 801 determines the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information, it is specifically configured to: determine the number of bits of the first data, The number of subcarriers that can be used to transmit the second control information; according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information Determine the number of modulation symbols encoded by the second control information; determine a second time-frequency resource in the first time-frequency resource according to the number of modulation symbols encoded by the second control information.

In a possible design, the processing unit 801 is based on the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information, When determining the number of modulation symbols encoded by the second control information, it is specifically used to: according to the number of bits of the first data, the number of bits of the second control information, and the number of bits that can be used to transmit the second control information The number of subcarriers of the information determines the first parameter; the second parameter is determined according to the number of subcarriers that can be used to transmit the second control information; the minimum value of the first parameter and the second parameter is determined to be The number of modulation symbols after the second control information is encoded.

In a possible design, the processing unit 801 determines according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information. The first parameter is specifically used for: according to the first adjustment factor and the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information , Determine a first parameter, wherein the first adjustment factor is related to the second control information, and the first adjustment factor is a positive real number greater than or equal to 1.

In a possible design, the processing unit 801 is further configured to indicate the first adjustment factor through the first control information.

In a possible design, the first parameter satisfies the following relationship:

or

among them,

In a possible design, when the processing unit 801 determines the second parameter according to the number of subcarriers that can be used to transmit the second control information, it is specifically configured to: Determine a second parameter based on the number of subcarriers for transmitting the second control information, wherein the second adjustment factor is related to the second control information, and the second adjustment factor is greater than 0 and less than or equal to 1. Positive real number.

In a possible design, the processing unit 801 is further configured to indicate the second adjustment factor through the first control information.

or

In a possible design, the time-frequency resource determined by the processing unit 801 according to the second parameter does not include at least one of the following: the first OFDM symbol used to transmit the first data channel on the first time unit The sub-carrier on the first time unit; the sub-carrier on the last OFDM symbol on the first time unit; the sub-carrier on the OFDM symbol occupied by the feedback information on the first time unit; the location of the feedback information on the first time unit The subcarrier on the first OFDM symbol before the OFDM symbol; the subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information on the first time unit is located; the subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information on the first time unit is located; The subcarrier on the first OFDM symbol after the OFDM symbol; the subcarrier occupied by the demodulation reference signal of the first control information; the subcarrier occupied by the demodulation reference signal of the first data channel; the phase tracking reference Sub-carriers occupied by the signal; sub-carriers occupied by the channel state information reference signal; sub-carriers occupied by the first control information.

Based on the same technical concept, an embodiment of the present application further provides a communication device. Referring to FIG. 9, the communication device includes a transmitter 901 and a processor 902. The processor 902 is coupled with the transmitter 901, for example, connected via a bus 903.

Based on the same technical concept, an embodiment of the present application also provides a communication device. Referring to FIG. 10, the communication device includes a receiver 1001 and a processor 1002. The processor 1002 is coupled with the receiver 1001, for example, connected via a bus 1003. Wherein, the processor 1002 and the receiver 1001 cooperate to be able to perform corresponding functions performed by the receiving device in the foregoing method embodiment.

Based on the same technical concept, an embodiment of the present application also provides a communication device. Referring to FIG. 11, the communication device includes a processor 1101 and a memory 1102; the memory 1102 is used to store computer execution instructions; the processor 1101 is used to execute The computer-executed instructions stored in the memory 1102 enable the communication device to execute the method executed by the sending device in the foregoing method embodiment.

Based on the same technical concept, an embodiment of the present application also provides a communication device. Referring to FIG. 12, the communication device includes a processor 1201 and a memory 1202; the memory 1202 is used to store computer execution instructions; the processor 1201 is used to execute The computer-executed instructions stored in the memory 1202 enable the communication device to execute the method executed by the receiving device in the foregoing method embodiment.

It should be understood that the processor (such as the processor 1101, the processor 1201) in the communication device provided in the embodiment of the present application may include a central processing unit (CPU) or an Application Specific Integrated Circuit (ASIC), and may include one The or multiple integrated circuits used to control program execution may include hardware circuits developed using Field Programmable Gate Array (Field Programmable Gate Array, FPGA), and may include baseband chips.

It should be understood that the memory (such as the memory 1102, the memory 1202) provided in the embodiments of the present application may include a read only memory (ROM), a random access memory (RAM), a disk memory, and so on. The memory can be used to store program codes required by the processor to perform tasks, and can also be used to store data and the like.

Based on the same technical concept, an embodiment of the present application also provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions To execute the method executed by the sending device in the foregoing method embodiment.

Based on the same technical concept, the embodiments of the present application also provide a readable storage medium, the readable storage medium is used to store instructions, and when the instructions are executed, the method executed by the sending device in the foregoing method embodiment Be realized.

Based on the same technical concept, the embodiments of the present application also provide a readable storage medium, the readable storage medium is used to store instructions, and when the instructions are executed, the method executed by the receiving device in the foregoing method embodiment Be realized.

Based on the same technical concept, an embodiment of the present application also provides a chip, which is coupled with a memory, and is used to read and execute the program instructions stored in the memory to implement the control performed by the sending device in the foregoing method embodiment. Information delivery method.

Based on the same technical concept, an embodiment of the present application also provides a chip, which is coupled with a memory, and is used to read and execute the program instructions stored in the memory to implement the control performed by the receiving device in the above method embodiment. Information receiving method.

Based on the same technical concept, the embodiments of the present application also provide a computer program product containing instructions. The computer program product stores instructions that, when running on a computer, cause the computer to execute the same as described by the sending device in the foregoing method embodiment. The executed control information transmission method.

Based on the same technical concept, the embodiments of the present application also provide a computer program product containing instructions. The computer program product stores instructions that, when run on a computer, cause the computer to execute the method as described by the receiving device in the foregoing method embodiment. The executed control information receiving method.

Based on the same technical concept, an embodiment of the present application further provides a communication system, including a sending device and a receiving device, the sending device is configured to execute the control information sending method performed by the sending device in the foregoing method embodiment, and the receiving device It is used to execute the control information receiving method executed by the receiving device in the above method embodiment.

All relevant content of the steps involved in the foregoing method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here.

Since the communication device provided in the embodiment of the present application can be used to execute the above-mentioned control information sending method or receiving method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, which will not be repeated here.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to the flowcharts and/or block diagrams of the methods, equipment (systems), and computer program products according to the application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to this application without departing from the scope of protection of this application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A method for sending control information, characterized in that it comprises:

Determining the number of bits of the second control information;

The second time-frequency resource is determined in the first time-frequency resource according to the number of bits of the second control information, where the first time-frequency resource is the time-frequency resource indicated by the first control information, and the second time-frequency resource is The resource is used to carry the resource of the modulation symbol encoded by the second control information;

Sending the second control information on the second time-frequency resource.
The method according to claim 1, wherein the first control information and the second control information are located on the same time unit; the time domain position of the second control information on the time unit is not earlier In the time domain position of the first control information on the time unit.
The method according to claim 1 or 2, wherein determining the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information comprises:

Determining the number of bits of the first data and the number of subcarriers that can be used to transmit the second control information;

Determine the number of modulation symbols encoded by the second control information according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information ；

Determine a second time-frequency resource in the first time-frequency resource according to the number of modulation symbols encoded by the second control information.
The method according to claim 3, wherein according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information, Determining the number of modulation symbols after encoding the second control information includes:

Determining the first parameter according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information;

Determine the second parameter according to the number of subcarriers that can be used to transmit the second control information;

Determine that the minimum value of the first parameter and the second parameter is the number of modulation symbols after encoding the second control information.
The method according to claim 4, characterized in that it is determined according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information The first parameter includes:

The first parameter is determined according to the first adjustment factor and the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information, wherein the The first adjustment factor is related to the second control information, and the first adjustment factor is a positive real number greater than or equal to 1.
The method of claim 5, wherein the first adjustment factor is indicated by the first control information.
The method of claim 5, wherein the first parameter satisfies the following relationship:

Wherein, Q 1 represents the first parameter, f represents a function related to the number of bits of the second control information, h represents the number of bits of the first data, and g represents the number of bits that can be used to transmit the second control information. The number of subcarriers of control information;

Wherein, the function f related to the number of bits of the second control information satisfies:

or

among them,
Represents the first adjustment factor, O SCI2 represents the number of bits of the second control information, L SCI2 is the length of the cyclic redundancy check CRC bit of the second control information; s represents the first adjustment factor, O SCI2 (s) represents the number of bits of the second control information determined based on the transmission mode of the first data,
Represents the first adjustment factor determined based on the transmission mode of the first data.
The method according to claim 4, wherein determining the second parameter according to the number of subcarriers that can be used to transmit the second control information comprises:

Determine a second parameter according to the second adjustment factor and the number of subcarriers that can be used to transmit the second control information, where the second adjustment factor is related to the second control information, and the second adjustment factor It is a positive real number greater than 0 and less than or equal to 1.
The method of claim 8, wherein the second adjustment factor is indicated by the first control information.
The method according to claim 8, wherein the second parameter satisfies the following relationship:

or

Where J represents the second parameter, g represents the number of subcarriers that can be used to transmit the second control information, s represents the second adjustment factor, α represents the second adjustment factor; W represents all The number of subcarriers used to transmit designated information on the first time-frequency resource.
The method according to any one of claims 5-10, wherein the second control information indicates that the transmission mode of the first data is unicast, multicast, or broadcast.
The method according to any one of claims 1-11, wherein the first time-frequency resource does not include at least one of the following:

A subcarrier on the first orthogonal frequency division multiplexing OFDM symbol used to transmit the first data channel on the first time unit;

The subcarrier on the last OFDM symbol on the first time unit;

The subcarriers on the OFDM symbols occupied by the feedback information on the first time unit;

The subcarrier on the first OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier number on the first OFDM symbol after the OFDM symbol where the feedback information is located on the first time unit;

Subcarriers occupied by the demodulation reference signal of the first control information;

Subcarriers occupied by the demodulation reference signal of the first data channel;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal;

The subcarrier occupied by the first control information.
The method according to any one of claims 4-10, wherein the time-frequency resource determined according to the second parameter does not include at least one of the following:

The subcarrier on the first OFDM symbol used to transmit the first data channel in the first time unit;

The subcarrier on the last OFDM symbol on the first time unit;

The subcarriers on the OFDM symbols occupied by the feedback information on the first time unit;

The subcarrier on the first OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier on the first OFDM symbol after the OFDM symbol where the feedback information is located on the first time unit;

Subcarriers occupied by the demodulation reference signal of the first control information;

Subcarriers occupied by the demodulation reference signal of the first data channel;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal;

The subcarrier occupied by the first control information.
The method according to any one of claims 1-13, wherein the first control information is the first side uplink control information SCI, the second control information is the second SCI, and the first control information is the second SCI. The one-time frequency resource is the PSSCH resource of the physical side link shared channel.
A method for receiving control information, which is characterized in that it comprises:

Determining the number of bits of the second control information;

The second time-frequency resource is determined in the first time-frequency resource according to the number of bits of the second control information, where the first time-frequency resource is the time-frequency resource indicated by the first control information, and the second time-frequency resource is The resource is used to carry the resource of the modulation symbol encoded by the second control information;

Receiving the second control information on the second time-frequency resource.
The method according to claim 15, wherein the first control information and the second control information are located on the same time unit; the time domain position of the second control information on the time unit is not earlier In the time domain position of the first control information on the time unit.
The method according to claim 15 or 16, wherein determining the second time-frequency resource in the first time-frequency resource according to the number of bits of the second control information comprises:

Determining the number of bits of the first data and the number of subcarriers that can be used to transmit the second control information;

Determine the number of modulation symbols encoded by the second control information according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information ；

Determine a second time-frequency resource in the first time-frequency resource according to the number of modulation symbols encoded by the second control information.
The method according to claim 17, characterized in that according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information, Determining the number of modulation symbols after encoding the second control information includes:

Determining the first parameter according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information;

Determine the second parameter according to the number of subcarriers that can be used to transmit the second control information;

Determine that the minimum value of the first parameter and the second parameter is the number of modulation symbols after encoding the second control information.
The method according to claim 18, characterized in that it is determined according to the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information. The first parameter includes:

The first parameter is determined according to the first adjustment factor and the number of bits of the first data, the number of bits of the second control information, and the number of subcarriers that can be used to transmit the second control information, wherein the The first adjustment factor is related to the second control information, and the first adjustment factor is a positive real number greater than or equal to 1.
The method of claim 19, wherein the first adjustment factor is indicated by the first control information.
The method of claim 19, wherein the first parameter satisfies the following relationship:

Wherein, Q 1 represents the first parameter, f represents a function related to the number of bits of the second control information, h represents the number of bits of the first data, and g represents the number of bits that can be used to transmit the second control information. The number of subcarriers of control information;

Wherein, the function f related to the number of bits of the second control information satisfies:

or

among them,
Represents the first adjustment factor, O SCI2 represents the number of bits of the second control information, L SCI2 is the length of the cyclic redundancy check CRC bit of the second control information; s represents the first adjustment factor, O SCI2 (s) represents the number of bits of the second control information determined based on the transmission mode of the first data,
Represents the first adjustment factor determined based on the transmission mode of the first data.
The method of claim 18, wherein determining the second parameter according to the number of subcarriers that can be used to transmit the second control information comprises:

Determine a second parameter according to the second adjustment factor and the number of subcarriers that can be used to transmit the second control information, where the second adjustment factor is related to the second control information, and the second adjustment factor It is a positive real number greater than 0 and less than or equal to 1.
The method of claim 22, wherein the second adjustment factor is indicated by the first control information.
The method of claim 22, wherein the second parameter satisfies the following relationship:

or

Where J represents the second parameter, g represents the number of subcarriers that can be used to transmit the second control information, s represents the second adjustment factor, α represents the second adjustment factor; W represents all The number of subcarriers used to transmit designated information on the first time-frequency resource.
The method according to any one of claims 19-24, wherein the second control information indicates that the transmission mode of the first data is unicast, multicast, or broadcast.
The method according to any one of claims 15-25, wherein the first time-frequency resource does not include at least one of the following:

A subcarrier on the first orthogonal frequency division multiplexing OFDM symbol used to transmit the first data channel on the first time unit;

The subcarrier on the last OFDM symbol on the first time unit;

The subcarriers on the OFDM symbols occupied by the feedback information on the first time unit;

The subcarrier on the first OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier number on the first OFDM symbol after the OFDM symbol where the feedback information is located on the first time unit;

Subcarriers occupied by the demodulation reference signal of the first control information;

Subcarriers occupied by the demodulation reference signal of the first data channel;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal;

The subcarrier occupied by the first control information.
The method according to any one of claims 18-24, wherein the time-frequency resource determined according to the second parameter does not include at least one of the following:

The subcarrier on the first OFDM symbol used to transmit the first data channel in the first time unit;

The subcarrier on the last OFDM symbol on the first time unit;

The subcarriers on the OFDM symbols occupied by the feedback information on the first time unit;

The subcarrier on the first OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier on the second OFDM symbol before the OFDM symbol where the feedback information is located on the first time unit;

The subcarrier on the first OFDM symbol after the OFDM symbol where the feedback information is located on the first time unit;

Subcarriers occupied by the demodulation reference signal of the first control information;

Subcarriers occupied by the demodulation reference signal of the first data channel;

Subcarriers occupied by the phase tracking reference signal;

Subcarriers occupied by the channel state information reference signal;

The subcarrier occupied by the first control information.
The method according to any one of claims 15-27, wherein the first control information is the first side uplink control information SCI, the second control information is the second SCI, and the first control information is the second SCI. The one-time frequency resource is the PSSCH resource of the physical side link shared channel.
A communication device, characterized in that it comprises a processor and a memory;

The memory is used to store computer execution instructions;

The processor is configured to execute computer-executable instructions stored in the memory, so that the communication device executes the method according to any one of claims 1 to 14.
A communication device, characterized in that it comprises a processor and a memory;

The memory is used to store computer execution instructions;

The processor is configured to execute computer-executable instructions stored in the memory, so that the communication device executes the method according to any one of claims 15 to 28.
A communication device, characterized in that it comprises a processor and an interface circuit;

The interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to execute the method according to any one of claims 1 to 14.
A communication device, characterized in that it comprises a processor and an interface circuit;

The interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to execute the method according to any one of claims 15 to 28.
A readable storage medium, wherein the readable storage medium is used to store instructions, and when the instructions are executed, the method according to any one of claims 1-14 is realized.
A readable storage medium, wherein the readable storage medium is used to store instructions, and when the instructions are executed, the method according to any one of claims 15-28 is realized.