WO2021056565A1 - Method for transmitting sidelink control information, and communication apparatus - Google Patents

Abstract

Provided are a method for transmitting sidelink control information, and a communication apparatus. The method can be applied to systems, such as the Internet of Vehicles, V2X and V2V. The method comprises: receiving first stage SCI, wherein the first stage SCI comprises a first field; and determining whether the first stage SCI satisfies a first condition, wherein when the first stage SCI satisfies the first condition, the first field is used for indicating configuration information of second stage SCI, and the second stage SCI is used for scheduling unicast data transmission or multicast data transmission; and when the first stage SCI does not satisfy the first condition, the first field is used for indicating configuration information of broadcast data transmission. According to the method provided in the present application, a unicast transmission mode, a multicast transmission mode and a broadcast transmission mode share first stage SCI; and in the unicast or multicast transmission mode, a first field is used to indicate configuration information of second stage SCI. The detection complexity of SCI is thus reduced.

Description

Method and communication device for side link control information transmission Technical field

The present application relates to the field of communications, and more specifically, to a method and communication device for transmission of side link control information.

Background technique

Vehicle-to-everything (V2X) communication is an important key technology for realizing environment perception and information interaction in the Internet of Vehicles. The communication links between different user terminal devices may be called sidelinks (SL). The vehicle-to-everything (V2X) communication between the vehicle and other entities (entity) can be carried out using a side link. The physical resource allocation in V2X communication includes two allocation methods: the first allocation method is based on the scheduling of network equipment (such as base station), and the user equipment in V2X sends V2X on the scheduled time-frequency resources according to the scheduling information of the network equipment. Communication control messages and data. The second allocation method is that the V2X user equipment automatically selects the time-frequency resources used for V2X communication from the available time-frequency resources included in the pre-configured V2X communication resource pool.

In the side link, the device that sends data can notify the device that needs to receive the data about the resource configuration of the data through the side link control information (SCI). In V2X communication, there are also multicast data services, unicast data services, and broadcast transmission data services. If the data of different types of services are transmitted in a shared resource pool, the SCI content of these types of services may be different. Therefore, you can consider using two-stage SCI (two-stage SCI). Further, the two-stage SCI is divided into the first stage SCI (first stage SCI) and the first stage SCI (second stage SCI). Among them, the terminal equipment for broadcast data transmission only needs to detect the first stage SCI, and only the terminal equipment for unicast and multicast data transmission needs to detect the first stage SCI and the second stage SCI. That is, the first stage SCI can be shared by the three services. But even if the first stage SCI can be shared by the three services, the difference in unicast type, multicast type, and broadcast type still determines that the design of the first stage SCI for different service types is different. How to ensure that the control overhead of the first stage SCI is minimized, and to reduce the detection complexity of the SCI corresponding to different services is a problem that needs to be solved urgently.

Summary of the invention

The present application provides a method and communication device for transmitting side link control information, which can reduce the complexity of SCI detection.

In the first aspect, a method for transmitting side link control information is provided. The execution subject of the method may be a terminal device or a chip applied to the terminal device. The method includes: receiving first side uplink control information SCI, where the first SCI includes a first field; and determining whether the first SCI satisfies a first condition;

When the first SCI satisfies the first condition, the first field is used to indicate the configuration information of the second SCI, where the second SCI is used to schedule unicast data transmission or multicast data transmission; or, when the first SCI When an SCI does not meet the first condition, the first field is used to indicate the configuration information of broadcast data transmission;

Wherein, the first condition includes at least one of the following conditions:

The first SCI uses the wireless network temporary identification RNTI to scramble, the first SCI uses the first wireless network temporary identification RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the first SCI The format identifier is a first identifier or a second identifier, the first SCI includes a target identifier and the target identifier corresponds to a terminal device that receives the first SCI, and the first SCI includes a target identifier and the target identifier corresponds to a unicast service/multicast service.

The side link control information transmission method provided by the first aspect shares the first SCI (SCI1) through unicast data transmission, multicast data transmission, and broadcast data transmission. The first SCI can be shared by the three services, which can reduce the first SCI (SCI1). One SCI detection complexity. Moreover, when the first SCI satisfies the first condition, that is, in the unicast transmission mode or the multicast transmission mode, the first field of the first SCI is further used to indicate the related configuration information of the second SCI, and the second SCI is reduced. The detection complexity of the SCI improves the efficiency of the terminal equipment to obtain the second SCI (SCI2), saves communication resources, and improves the communication efficiency.

In a possible implementation manner of the first aspect, that the first SCI satisfies the first condition includes:

The first SCI uses RNTI to scramble, the first SCI uses the first RNTI to scramble, the first SCI uses the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the format ID of the first SCI ) Is the first identifier, the first SCI includes a target ID (target ID) and the target identifier corresponds to the terminal device that receives the first SCI, the first SCI includes the target identifier, and the target identifier corresponds to the unicast service/multicast service If at least one is satisfied, the first SCI meets the first condition. In this implementation manner, the first SCI uses RNTI to scramble, the first SCI uses the first RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the first SCI contains the target identifier, the first SCI The format ID of an SCI is a specific format ID to determine that the first SCI satisfies the first condition, which is easy to implement, and the complexity of the first condition is low. This enables the terminal device to accurately and quickly determine that the first SCI meets the first condition, and improves the efficiency and accuracy of determining that the first SCI meets the first condition.

In a possible implementation of the first aspect, when the first SCI uses the first RNTI to scramble, the first RNTI is used to indicate that the first SCI is used for unicast data transmission; or, when the first SCI is used for unicast data transmission; When the SCI uses the second RNTI to scramble, the second RNTI is used to indicate that the first SCI is used for multicast data transmission. In this implementation, the first RNTI is used to implicitly indicate that the first SCI is used for unicast data transmission, and the second RNTI is used to implicitly indicate that the first SCI is used for multicast data transmission, which is easy to implement and can make the terminal equipment accurate Quickly determine whether the first SCI is used for unicast data transmission or multicast data transmission, and improve the efficiency of the terminal device in determining the data type scheduled by the first SCI.

In a possible implementation of the first aspect, when the first SCI is scrambled by the first RNTI, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

When the first SCI scrambles by using the second RNTI, the first field is used to indicate the configuration information of the second SCI used for scheduling multicast data transmission. In this implementation, the first RNTI is used to implicitly indicate that the second SCI includes configuration information for unicast data transmission, and the second RNTI is used to implicitly indicate that the second SCI includes configuration information for multicast data transmission, which is easy to implement and can make The terminal device accurately and quickly determines whether the second SCI is used for unicast data transmission or multicast data transmission, which improves the efficiency of the terminal device in determining the data type scheduled by the second SCI.

In a possible implementation of the first aspect, when the first SCI includes a target identifier and the target identifier corresponds to a terminal device that receives the first SCI, the terminal device determines that it is the recipient of the second SCI, and detects that the second SCI SCI. In this implementation manner, by using the first SCI to include a target ID (target ID) and the target ID corresponds to the terminal device that receives the first SCI, to indicate that the terminal device needs to detect the second SCI, which can improve the terminal device's determination that it needs to be detected. The efficiency and accuracy of the second SCI reduces the complexity of the second SCI required to determine the need for terminal equipment, and is easy to implement.

In a possible implementation of the first aspect, when the first SCI contains a target identifier and the target identifier corresponds to a terminal device that receives the first SCI, the first field is used to indicate that it is used to schedule unicast data transmission or multicast The configuration information of the second SCI for data transmission. In this implementation manner, by using the first SCI to include a target ID (target ID) and the target ID corresponds to the terminal device that receives the first SCI, it is implicitly indicated that the second SCI includes multicast data transmission or unicast data transmission. The configuration information is easy to implement, which enables the terminal device to accurately and quickly determine whether the second SCI is used for unicast data transmission or multicast data transmission, and improves the efficiency of the terminal device in determining the data type scheduled by the second SCI.

In a possible implementation of the first aspect, when the first SCI includes a target identifier and the target identifier corresponds to a terminal device that receives the first SCI, the first SCI is used for unicast data transmission or for multicast data transmission . In this implementation manner, the first SCI contains a target ID (target ID) and the target ID corresponds to the terminal device that receives the first SCI to implicitly indicate that the first SCI is used for unicast data transmission or used for multicast Data transmission is easy to implement, which enables the terminal device to accurately and quickly determine that the first SCI is used for unicast data transmission or for multicast data transmission, and improves the efficiency of the terminal device in determining the data type scheduled by the first SCI.

In a possible implementation of the first aspect, when the first SCI contains a target identifier and the target identifier corresponds to a unicast service or a multicast service, the first field is used to indicate that it is used to schedule unicast data transmission or multicast The configuration information of the second SCI for data transmission. In this implementation manner, by using the first SCI to include a target ID and the target ID corresponds to a unicast service or a multicast service, it is implicitly indicated that the second SCI includes configuration information for multicast data transmission or is unicast. The configuration information for data transmission is easy to implement, which enables the terminal device to accurately and quickly determine whether the second SCI is used for unicast data transmission or multicast data transmission, and improves the efficiency of the terminal device in determining the data type scheduled by the second SCI.

In a possible implementation of the first aspect, when the first SCI contains a target identifier and the target identifier corresponds to a unicast service or a multicast service, the first SCI is used for unicast data transmission or for multicast data transmission . In this implementation manner, when the first SCI contains a target ID and the target ID corresponds to a unicast service or a multicast service, it implicitly indicates whether the first SCI is used for unicast data transmission or multicast data transmission , Easy to implement, can make the terminal device accurately and quickly determine whether the first SCI is used for unicast data transmission or multicast data transmission, and improve the efficiency of the terminal device in determining the data type scheduled by the first SCI.

In a possible implementation of the first aspect, the first RNTI is a cell radio network temporary identifier C-RNTI, or a unicast radio network temporary identifier U-RNTI. In this implementation manner, by using the cell wireless network temporary identification to indicate unicast data transmission, the efficiency and accuracy for indicating unicast data transmission can be improved.

In a possible implementation of the first aspect, the second RNTI may be a group radio network temporary identification G-RNTI. In this implementation manner, by using the group wireless network temporary identification to indicate the multicast data transmission, the efficiency and accuracy for indicating the multicast data transmission can be improved.

In a possible implementation manner of the first aspect, in a possible implementation manner of the first aspect, when the parameter of the first field is greater than or equal to the first threshold, the parameter of the first field and the second SCI There is a corresponding relationship between the configuration information. In this implementation, because there is a correspondence between the parameters of the first field and the configuration information of the second SCI, the terminal device can quickly and accurately determine the configuration information of the second SCI according to the parameters of the first field, which improves the determination of the second SCI configuration information. 2. The efficiency of SCI.

In a possible implementation of the first aspect, when the format identifier of the first SCI is the first identifier, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or When the format identifier of the first SCI is the second identifier, the first field is used to indicate the configuration information of the second SCI used for scheduling multicast data transmission. In this implementation manner, the first identifier is used to implicitly indicate that the second SCI includes configuration information for unicast data transmission, and the second identifier is used to implicitly indicate that the second SCI includes configuration information for multicast data transmission, which is easy to implement and can make The terminal device accurately and quickly determines whether the second SCI is used for unicast data transmission or multicast data transmission, which improves the efficiency of the terminal device in determining the data type scheduled by the second SCI.

In a possible implementation manner of the first aspect, the failure of the first SCI to satisfy the first condition includes:

The first SCI is not scrambled by RNTI, the first SCI is not scrambled by the first RNTI, the first SCI is not scrambled by the second RNTI, the parameter of the first field is less than the first threshold, the format identifier of the first SCI (format ID) is not the first identification or the second identification, the first SCI contains a target ID but the target ID does not correspond to the terminal device that receives the first SCI, the first SCI contains the target ID but the target ID does not correspond to the single If at least one of the broadcast service/multicast service and the first SCI does not contain the target identifier is satisfied, the first SCI does not satisfy the first condition. In this implementation manner, by using the first SCI without using RNTI for scrambling, the first SCI without using the first RNTI or the second RNTI for scrambling, the parameter of the first field is less than the first threshold, and the first SCI does not contain the target identifier. , The first SCI does not contain a specific target identifier, and the format ID of the first SCI is not a specific format ID to determine that the first SCI does not meet the first condition, which is easy to implement, and enables the terminal device to accurately and quickly determine the first condition. If an SCI does not meet the first condition, the efficiency and accuracy of determining that the first SCI does not meet the first condition are improved.

In a possible implementation manner of the first aspect, the configuration information of the second SCI includes:

The format corresponding to the second SCI, the aggregation level of the second SCI, the load corresponding to the second SCI or the location information of the second SCI, the first target identifier (the first target identifier corresponds to the terminal device that receives the first SCI ), at least one of a second target identifier (the second target identifier corresponds to a unicast service/multicast service). In this implementation manner, through the configuration information of the second SCI including the content, the terminal device can detect the second SCI more quickly, reducing the complexity of detecting the second SCI by the terminal device, and reducing the power consumption of the terminal device.

In a possible implementation of the first aspect, the first field (information) may be the MCS indication field (information), the hybrid automatic repeat request HARQ process digital field (information), and the new data indication NDI) field in the first SCI. A combination of at least one or more fields among (information), redundant version field (information), and multi-antenna-related fields (information). In this implementation manner, by designing the first field of the first SCI, the terminal device can determine the first field more quickly, so as to determine the configuration information of the second SCI or the configuration information of broadcast data transmission according to the first field. The efficiency of obtaining the configuration information of the second SCI or the configuration information of the broadcast data transmission by the terminal device is improved, thereby improving the communication efficiency.

In the second aspect, a method for transmitting side link control information is provided. The execution subject of the method may be a terminal device or a chip applied to the terminal device. The method includes: generating first side uplink control information SCI, where the first SCI includes a first field; sending the first SCI;

Wherein, when the first SCI satisfies the first condition, the first field is used to indicate the configuration information of the second SCI, and the second SCI is used to schedule unicast data transmission or multicast data transmission; or

When the first SCI does not meet the first condition, the first field is used to indicate the configuration information of the broadcast data transmission;

The first condition includes at least one of the following conditions:

The first SCI uses the wireless network temporary identifier RNTI to scramble, the first SCI uses the first RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, and the format identifier of the first SCI is the first An identifier or a second identifier, the first SCI includes a target identifier and the target identifier corresponds to a terminal device that receives the first SCI, the first SCI includes a target identifier and the target identifier corresponds to a unicast service/multicast service.

In the method for transmitting side link control information provided by the second aspect, the first SCI is shared by unicast data transmission, multicast data transmission, and broadcast data transmission, and the communication device transmits the first SCI. The first SCI can be shared by the three services, which can reduce the detection complexity of the first SCI. Moreover, when the first SCI satisfies the first condition, that is, in the unicast transmission mode or the multicast transmission mode, the first field of the first SCI is further used to indicate the related configuration information of the second SCI, and the second SCI is reduced. The detection complexity of SCI improves the efficiency of terminal equipment to obtain the second SCI, saves communication resources, and improves communication efficiency.

In a possible implementation manner of the second aspect, that the first SCI satisfies the first condition includes:

The first SCI uses RNTI to scramble, the first SCI uses the first RNTI to scramble, the first SCI uses the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the format ID of the first SCI ) Is the first identifier, the first SCI includes a target ID (target ID) and the target identifier corresponds to the terminal device that receives the first SCI, the first SCI includes the target identifier, and the target identifier corresponds to the unicast service/multicast service If at least one is satisfied, the first SCI meets the first condition. In this implementation, the first RNTI is used to implicitly indicate that the first SCI is used for unicast data transmission, and the second RNTI is used to implicitly indicate that the first SCI is used for multicast data transmission, which is easy to implement and can make the terminal equipment accurate Quickly determine whether the first SCI is used for unicast data transmission or multicast data transmission, and improve the efficiency of the terminal device in determining the data type scheduled by the first SCI.

In a possible implementation of the second aspect, when the first SCI uses the first RNTI to scramble, the first RNTI is used to indicate that the first SCI is used for unicast data transmission; or, when the first SCI is used for unicast data transmission; When the SCI uses the second RNTI to scramble, the second RNTI is used to indicate that the first SCI is used for multicast data transmission. In this implementation, the first RNTI is used to implicitly indicate that the second SCI includes configuration information for unicast data transmission, and the second RNTI is used to implicitly indicate that the second SCI includes configuration information for multicast data transmission, which is easy to implement and can make The terminal device accurately and quickly determines whether the second SCI is used for unicast data transmission or multicast data transmission, which improves the efficiency of the terminal device in determining the data type scheduled by the second SCI.

In a possible implementation of the second aspect, when the first SCI is scrambled by the first RNTI, the first field is used to indicate the configuration information of the second SCI for scheduling unicast data transmission; or

When the first SCI scrambles by using the second RNTI, the first field is used to indicate the configuration information of the second SCI used for scheduling multicast data transmission. In this implementation, the first RNTI is used to implicitly indicate that the second SCI includes configuration information for unicast data transmission, and the second RNTI is used to implicitly indicate that the second SCI includes configuration information for multicast data transmission, which is easy to implement and can make The terminal device accurately and quickly determines whether the second SCI is used for unicast data transmission or multicast data transmission, which improves the efficiency of the terminal device in determining the data type scheduled by the second SCI.

In a possible implementation of the second aspect, when the first SCI includes a target identifier and the target identifier corresponds to a terminal device that receives the first SCI, the terminal device determines that it is the recipient of the second SCI, and detects the second SCI. SCI. In this implementation manner, by using the first SCI to include a target ID (target ID) and the target ID corresponds to the terminal device that receives the first SCI, to indicate that the terminal device needs to detect the second SCI, which can improve the terminal device's determination that it needs to be detected. The efficiency and accuracy of the second SCI reduces the complexity of the second SCI required to determine the need for terminal equipment, and is easy to implement.

In a possible implementation of the second aspect, when the first SCI contains a target identifier and the target identifier corresponds to a terminal device that receives the first SCI, the first field is used to indicate that it is used to schedule unicast data transmission or multicast The configuration information of the second SCI for data transmission. In this implementation manner, by using the first SCI to include a target ID (target ID) and the target ID corresponds to the terminal device that receives the first SCI, it is implicitly indicated that the second SCI includes multicast data transmission or unicast data transmission. The configuration information is easy to implement, which enables the terminal device to accurately and quickly determine whether the second SCI is used for unicast data transmission or multicast data transmission, and improves the efficiency of the terminal device in determining the data type scheduled by the second SCI.

In a possible implementation of the second aspect, when the first SCI includes a target identifier and the target identifier corresponds to a terminal device that receives the first SCI, the first SCI is used for unicast data transmission or for multicast data transmission . In this implementation manner, the first SCI contains a target ID (target ID) and the target ID corresponds to the terminal device that receives the first SCI to implicitly indicate that the first SCI is used for unicast data transmission or used for multicast Data transmission is easy to implement, which enables the terminal device to accurately and quickly determine that the first SCI is used for unicast data transmission or for multicast data transmission, and improves the efficiency of the terminal device in determining the data type scheduled by the first SCI.

In a possible implementation of the second aspect, when the first SCI contains a target identifier and the target identifier corresponds to a unicast service or a multicast service, the first field is used to indicate that it is used for scheduling unicast data transmission or multicast The configuration information of the second SCI for data transmission. In this implementation manner, by using the first SCI to include a target ID and the target ID corresponds to a unicast service or a multicast service, it is implicitly indicated that the second SCI includes configuration information for multicast data transmission or is unicast. The configuration information for data transmission is easy to implement, which enables the terminal device to accurately and quickly determine whether the second SCI is used for unicast data transmission or multicast data transmission, and improves the efficiency of the terminal device in determining the data type scheduled by the second SCI.

In a possible implementation of the second aspect, when the first SCI contains a target identifier and the target identifier corresponds to a unicast service or a multicast service, the first SCI is used for unicast data transmission or for multicast data transmission . In this implementation manner, when the first SCI contains a target ID and the target ID corresponds to a unicast service or a multicast service, it implicitly indicates whether the first SCI is used for unicast data transmission or multicast data transmission , Easy to implement, can make the terminal device accurately and quickly determine whether the first SCI is used for unicast data transmission or multicast data transmission, and improve the efficiency of the terminal device in determining the data type scheduled by the first SCI.

In a possible implementation of the second aspect, the first RNTI is a cell radio network temporary identifier C-RNTI, or a unicast radio network temporary identifier U-RNTI. In this implementation manner, by using the cell wireless network temporary identification to indicate unicast data transmission, the efficiency and accuracy for indicating unicast data transmission can be improved.

In a possible implementation manner of the second aspect, the second RNTI may be a group radio network temporary identification G-RNTI. In this implementation manner, by using the group wireless network temporary identification to indicate the multicast data transmission, the efficiency and accuracy for indicating the multicast data transmission can be improved.

In a possible implementation manner of the second aspect, in a possible implementation manner of the first aspect, when the parameter of the first field is greater than or equal to the first threshold, the parameter of the first field and the second SCI There is a corresponding relationship between the configuration information. In this implementation, because there is a correspondence between the parameters of the first field and the configuration information of the second SCI, the terminal device can quickly and accurately determine the configuration information of the second SCI according to the parameters of the first field, which improves the determination of the second SCI configuration information. 2. The efficiency of SCI.

In a possible implementation of the second aspect, when the format identifier of the first SCI is the first identifier, the first field is used to indicate the configuration information of the second SCI for scheduling unicast data transmission; or When the format identifier of the first SCI is the second identifier, the first field is used to indicate the configuration information of the second SCI used for scheduling multicast data transmission. In this implementation manner, the first identifier is used to implicitly indicate that the second SCI includes configuration information for unicast data transmission, and the second identifier is used to implicitly indicate that the second SCI includes configuration information for multicast data transmission, which is easy to implement and can make The terminal device accurately and quickly determines whether the second SCI is used for unicast data transmission or multicast data transmission, which improves the efficiency of the terminal device in determining the data type scheduled by the second SCI.

In a possible implementation manner of the second aspect, the failure of the first SCI to satisfy the first condition includes:

The first SCI is not scrambled by RNTI, the first SCI is not scrambled by the first RNTI, the first SCI is not scrambled by the second RNTI, the parameter of the first field is less than the first threshold, the format identifier of the first SCI (format ID) is not the first identification or the second identification, the first SCI contains a target ID but the target ID does not correspond to the terminal device that receives the first SCI, the first SCI contains the target ID but the target ID does not correspond to the single If at least one of the broadcast service/multicast service and the first SCI does not contain the target identifier is satisfied, the first SCI does not satisfy the first condition. In this implementation manner, by using the first SCI without using RNTI for scrambling, the first SCI without using the first RNTI or the second RNTI for scrambling, the parameter of the first field is less than the first threshold, and the first SCI does not contain the target identifier. , The first SCI does not contain a specific target identifier, and the format ID of the first SCI is not a specific format ID to determine that the first SCI does not meet the first condition, which is easy to implement, and enables the terminal device to accurately and quickly determine the first condition. If an SCI does not meet the first condition, the efficiency and accuracy of determining that the first SCI does not meet the first condition are improved.

In a possible implementation manner of the second aspect, the configuration information of the second SCI includes:

The format corresponding to the second SCI, the aggregation level of the second SCI, the load corresponding to the second SCI or the location information of the second SCI, the first target identifier (the first target identifier corresponds to the terminal device that receives the first SCI ), at least one of a second target identifier (the second target identifier corresponds to a unicast service/multicast service).

In a possible implementation of the second aspect, the first field (information) may be the MCS indication field (information), the hybrid automatic repeat request HARQ process digital field (information), and the new data indication NDI) field in the first SCI. A combination of at least one or more fields among (information), redundant version field (information), and multi-antenna-related fields (information).

In a third aspect, a communication device is provided, which includes a unit for executing the steps of the above first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, a communication device is provided, and the device includes a unit for executing each step in the above second aspect or any possible implementation manner of the second aspect.

In a fifth aspect, a communication device is provided, the device includes at least one processor and a memory, and the at least one processor is configured to execute the above first aspect or the method in any possible implementation of the first aspect.

In a sixth aspect, a communication device is provided, the device includes at least one processor and a memory, and the at least one processor is configured to execute the above second aspect or any possible implementation of the second aspect.

In a seventh aspect, a communication device is provided, which includes at least one processor and an interface circuit, and the at least one processor is configured to execute the above first aspect or the method in any possible implementation manner of the first aspect.

In an eighth aspect, a communication device is provided. The device includes at least one processor and an interface circuit, and the at least one processor is configured to execute the above second aspect or any possible implementation of the second aspect.

In a ninth aspect, a terminal device is provided, the terminal device includes the communication device provided in the third aspect, or the terminal device includes the communication device provided in the fifth aspect, or the terminal device includes the communication device provided in the seventh aspect.的通信装置。 Communication device.

In a tenth aspect, a terminal device is provided, the terminal device includes the communication device provided in the foregoing fourth aspect, or the terminal device includes the communication device provided in the foregoing sixth aspect, or the terminal device includes the communication device provided in the foregoing eighth aspect的通信装置。 Communication device.

In an eleventh aspect, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, the computer program is used to execute the first aspect to the second aspect, or the first aspect to the second aspect Any possible implementation in the method.

In a twelfth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program. When the computer program is executed, it is used to execute the first aspect to the second aspect, or the first aspect to the The method in any possible implementation of the second aspect.

In a thirteenth aspect, a chip is provided, including: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the above aspects or any of the possible implementations of the aspects Methods.

The method and communication device for side link control information transmission provided in this application share the first SCI for data transmission through unicast transmission mode, multicast transmission mode, and broadcast transmission mode. The SCI1 format and/or payload (payload size) corresponding to the three service types are the same, and different methods are used to distinguish the first SCI corresponding to the service type. In the unicast transmission mode or the multicast transmission mode, the first field in the first SCI is further used to indicate related configuration information of the second SCI. On the one hand, the first SCI can be shared by the three services, which can reduce the detection complexity of the first SCI. In addition, the detection complexity of the second SCI is reduced, the efficiency of obtaining the second SCI by the terminal device is improved, communication resources are saved, and the communication efficiency is improved.

Description of the drawings

Fig. 1 is a schematic diagram of an example of a communication system applicable to an embodiment of the present application.

Fig. 2 is a schematic diagram of another example of a communication system applicable to the method of the embodiment of the present application.

FIG. 3 is a schematic interaction diagram of an example of a method for transmitting side link control information according to an embodiment of the present application.

FIG. 4 is a schematic diagram of SCI1 corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission in an embodiment of the application.

FIG. 5 is a schematic diagram of SCI1 corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission in an embodiment of the application.

Fig. 6 is a schematic block diagram of a communication device provided by an embodiment of the present application.

FIG. 7 is a schematic block diagram of another example of a communication device provided by an embodiment of the present application.

FIG. 8 is a schematic block diagram of another example of a communication device provided by an embodiment of the present application.

FIG. 9 is a schematic block diagram of another example of a communication device according to an embodiment of the present application.

FIG. 10 is a schematic block diagram of a terminal device provided by an embodiment of the present application.

FIG. 11 is a schematic block diagram of another example of a terminal device according to an embodiment of the present application.

detailed description

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: V2X or device-to-device (D2D) communication systems, global system of mobile communication (GSM) systems, code division multiple access (Code Division Multiple Access, CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access , WiMAX) communication system, the future 5th Generation (5G) system or New Radio (NR), etc.

The terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. Cars, vehicle-mounted equipment, etc. in the V2X communication system. The terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), and wireless communication. Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (Public Land Mobile Network, PLMN) Terminal equipment, etc., which are not limited in the embodiment of the present application.

The network device in the embodiment of the application may be a device used to communicate with terminal devices, and the network device may be a Global System of Mobile Communication (GSM) system or Code Division Multiple Access (CDMA) The base station (Base Transceiver Station, BTS) in the LTE system can also be the base station (NodeB, NB) in the Wideband Code Division Multiple Access (WCDMA) system, or the evolved base station (Evolutional Base Station) in the LTE system. NodeB, eNB, or eNodeB), it can also be a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the network device can be a serving transmission reception point (Serving TRP), Relay stations, access points, in-vehicle devices, wearable devices, network devices in future 5G networks or network devices in future evolved PLMN networks, etc., are not limited in the embodiment of the present application.

In the embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory). The operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems or windows operating systems. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Moreover, the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided in accordance with the embodiments of the application. For example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.

In addition, various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques. The term "article of manufacture" used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

V2X communication is an important key technology for realizing environment perception and information interaction in the Internet of Vehicles. Other devices here can be other vehicles, other infrastructures, pedestrians, and terminal devices. V2X communication can be regarded as a special case of device to device (D2D) communication. The communication link between different user terminal devices can be referred to as SL. For example, the vehicle-to-vehicle communication link may be SL. In the V2X communication system, the physical sidelink control channel (PSCCH) is used to transmit control information in V2X communication, and the physical sidelink shared channel (PSSCH) is used to transmit data in V2X communication. .

At present, physical resource allocation in V2X communication includes two allocation methods. The first resource allocation method is based on the scheduling of network equipment (such as base stations). User equipment in V2X (such as vehicles or vehicle-mounted equipment) sends V2X communication control on the scheduled time-frequency resources according to the scheduling information of the network equipment. News and data. The second resource allocation method is that the user equipment in V2X automatically selects the time-frequency resources used for V2X communication from the available time-frequency resources included in the pre-configured V2X communication resource pool (or may also be referred to as the V2X resource set).

In the second resource allocation method, when the terminal device that sends data (the sending device is used as an example for description convenience) detects or senses resources in the resource pool, it needs to go to the side of other terminal devices The corresponding quality of service (QOS) parameter is interpreted in the link control information (side link control information, SCI), and the QOS can represent the priority information of other terminals sending data on the resource. For example, the parameter may be the data priority (ProSe Per-Packet Priority, PPPP) in the resource pool. The sending device can obtain the PPPP of other terminal devices on the resource according to the PPPP of the data it needs to send and the PPPP of the detected resource. If the corresponding threshold is met, the resource can be used. Otherwise, the resource cannot be used. Satisfying the corresponding threshold value means that the detected energy signal is less than or equal to the threshold value.

In the first resource allocation method, the network device schedules the sending device on the side link through downlink control information (DCI), and the sending device is based on the resources allocated for the side-line data transmission in the DCI (including the resources used for the side-line data transmission). The resources of the side link control information SCI and the resources used for the side link data transmission), on the side link through the SCI to notify the receiving device (receiving device) of the side line data resource and transmission method, etc. , And then send the side-line data to the receiving device on the side-line link. In the second resource allocation method, the sending device sends the SCI to the receiving device on the side link based on the successful detection of the channel, and notifies the receiving device of the resources and sending parameters of the side row data.

In the current discussion of the 3rd generation partnership project (3GPP), it is considered that the SCI sent on the side link can be further strengthened. The current SCI can be called single-level (single-level) SCI (single-level). -stage SCI), and it is proposed to consider using two-stage (two-stage) SCI (two-stage SCI) in the future. Two-stage SCI divides SCI into the first stage SCI (first stage SCI) and the second stage SCI (second stage SCI). Among them, the first stage SCI can also be called SCI1, and the second stage SCI can also be called SCI2. The terminal equipment working on the side link usually needs to detect the SCI1 and obtain the indicated resource (the resource can be reserved/scheduled, or has been used to schedule data), so as not to conflict when deciding the use of its own resources .

Table 1 shows the contents of single-stage SCI and two-stage SCI.

Table 1

Among them, RV stands for redundancy version (redundancy version, RV).

On the side link, there may also be a multicast transmission method, a unicast transmission method, and a broadcast transmission method. Multicast transmission methods, unicast transmission methods, and broadcast transmission methods can also be understood as different types of services.

Among them, the multicast transmission method, or can also be called a multicast (groupcast) transmission method, refers to a technology in which one terminal device that sends data sends the same data to multiple other terminal devices at the same time, that is, point-to-multipoint transmission. The unicast transmission mode refers to a mode in which a terminal device that sends data only sends data to another terminal device for the same data, that is, point-to-point transmission. The broadcast (broadcast) transmission mode refers to a mode in which a terminal device that sends data sends data on a broadcast channel, and all other terminal devices can receive data on the broadcast channel.

Table 2 shows the possible fields and the corresponding number of bits in the SCI used to schedule unicast data, multicast data, and broadcast data.

Table 2

Among them, the modulation and coding scheme (MCS) table is shown in Table 3. The MCS field in the SCI indicates the MCS index (index).

table 3

If data of different service types (unicast type, multicast type, broadcast type) are transmitted in a shared resource pool, the SCI content of these service types may be different. The service type may be one or more of unicast type, multicast type, and broadcast type. The SCI corresponding to broadcast data only needs to include resource occupancy information and simple scheduling information, while the SCI corresponding to unicast/multicast needs to include more complex scheduling information. Therefore, the payload size required by the SCI corresponding to the broadcast data and the SCI corresponding to the unicast/multicast may be different. The load here can be understood as the length of SCI information bits.

SCI is also a kind of control information, which can be used for resource detection and scheduling of unicast type, multicast type, and broadcast type data in SL. The terminal device that needs to receive the SCI needs to detect the SCI (or can be called blind detection), and a decoding is performed every time a blind detection is performed, and the total amount of calculation is very large. In order to minimize the amount of blind detection calculations for terminal equipment, it is necessary to keep the payload size of the SCI corresponding to different service types as the same as possible. When the SCI is used for unicast/multicast data, the SCI contains a lot of scheduling information, and these scheduling information may even involve the feedback information of the SL and the feedback of the channel state information of the SL. Therefore, by dividing the Two-stage SCI, the Two-stage SCI is divided into SCI1 (first stage SCI) and SCI 2 (second stage SCI). Consider that unicast type and multicast type data transmission share SCI1, and only use SCI2 for unicast type and multicast type. That is, the terminal equipment for broadcast data transmission only needs to detect SCI1, and only the terminal equipment for unicast and multicast data transmission can detect SCI1 and SCI2. For example, when terminal device 1 sends SCI to terminal device 2 to terminal device N, the data transmission mode of any terminal device or multiple terminal devices between terminal device 1 and terminal device 2 to terminal device N includes unicast transmission mode, Multicast transmission mode, broadcast transmission mode. Suppose the data transmission mode between terminal device 1 and terminal device 2 is unicast transmission mode, or suppose that the data transmission mode between terminal device 1 and terminal devices 3 to 5 is multicast transmission mode, and terminal device 1 and terminal device The data transmission mode between 6 and N is broadcast transmission mode. Then the terminal device 6 to the terminal device N need to detect SCI1, and the terminal devices 2 to 5 need to detect both SCI1 and SCI2. When the data transmission mode is a unicast transmission mode or a multicast transmission mode, the terminal device needs to detect two SCIs to correctly transmit the data. How to reduce the complexity of detecting the two SCIs in the terminal device has become a problem that needs to be solved urgently. Moreover, even if the first stage SCI can be shared by the three services, the difference in unicast type, multicast type, and broadcast type still determines that the design of the first stage SCI for different service types is different. In this case, how to ensure that the control overhead of the first stage SCI is minimized, and the detection complexity of the first stage SCI is also a problem that needs to be solved.

In view of this, the present application provides a method for transmission of side link control information, and the SCI1 is shared for data transmission through a unicast transmission mode, a multicast transmission mode, and a broadcast transmission mode. The SCI1 format and/or payload (payload size) corresponding to the three service types are the same, and different methods are used to distinguish the SCI1 corresponding to the service type. In the unicast transmission mode or the multicast transmission mode, the field of the SCI1 is further used to indicate the relevant configuration information of the SCI2. On the one hand, SCI1 can be shared by three services, which can reduce the detection complexity of SCI1. In addition, the detection complexity of SCI2 is reduced, the efficiency of obtaining SCI2 by terminal equipment is improved, communication resources are saved, and communication efficiency is improved.

In order to facilitate the understanding of the embodiments of the present application, firstly, a communication system suitable for the embodiments of the present application is briefly introduced with reference to FIG. 1 and FIG. 2.

FIG. 1 is a schematic diagram of a communication system 100 applicable to the method for transmitting side link control information according to an embodiment of the present application. As shown in FIG. 1, the communication system 100 includes four communication devices, for example, a network device 110, and terminal devices 121 to 123. The network device 110 and at least one of the terminal devices 121 to 123 can be connected via a wireless connection. data communication. For the terminal devices 121 to 123, the link formed between the two is SL. For example, when the network device 110 sends sideline data to the terminal device 122 and the terminal device 123 through the DCI scheduling terminal device 121, the terminal device 121 can use the method for transmitting side link control information provided in this application to the terminal device 122 and the terminal device. 123 sends SCI1 for scheduling unicast type and multicast type data transmission between the terminal device 121 and the terminal device 122 and the terminal device 123. Alternatively, the terminal device 121 may send the SCI1 to all terminal devices including the terminal device 122 and the terminal device 123 for scheduling broadcast-type data transmission between the terminal device 121 and all the terminals.

Fig. 2 is a schematic diagram of another communication system 120 applicable to the method for transmitting side link control information according to an embodiment of the present application. As shown in FIG. 2, the communication system 120 includes three communication devices, for example, terminal devices 121 to 123, wherein the terminal device and the terminal device can communicate data through D2D or V2X communication methods. For the terminal devices 121 to 123, the link between the two is SL. For example, the terminal device 121 can use the side link control information transmission method provided in this application to send the SCI1 to the terminal device 122 and the terminal device 123 for scheduling unicast between the terminal device 121 and the terminal device 122 and the terminal device 123. Type or multicast type of data transmission. Alternatively, the terminal device 121 may send the SCI1 to all terminal devices including the terminal device 122 and the terminal device 123 for scheduling broadcast-type data transmission between the terminal device 121 and all the terminals.

It should be understood that each communication system shown in FIG. 1 and FIG. 2 may also include more network nodes, such as more terminal devices or network devices, and the network devices included in each communication system shown in FIG. 1 and FIG. 2 Or the terminal device may be a network device or terminal device in various forms mentioned above. The embodiments of the present application are not shown one by one in the figure.

It should be understood that, in the embodiments of the present application, the terminal device is taken as an example of the execution subject of the execution method of each embodiment to describe the method of each embodiment. As an example and not a limitation, the execution subject of the execution method may also be a chip applied to a terminal device. The terminal device may be a vehicle, a vehicle-mounted device, a mobile phone terminal, etc. in V2X communication.

As shown in FIG. 3, the method 200 shown in FIG. 3 may include step S210 to step S230. Each step in the method 200 will be described in detail below with reference to FIG. 3.

S210: The first terminal device generates a first SCI, where the first SCI includes a first field. Among them, the first SCI may be the aforementioned SCI1.

S220: The first terminal device sends the first SCI to the second terminal device. Correspondingly, the second terminal device receives the first SCI.

S230: The second terminal device determines whether the first SCI satisfies the first condition.

Wherein, when the first SCI satisfies the first condition, the first field is used to indicate the configuration information of the second SCI, where the second SCI is used to schedule unicast data transmission or multicast data transmission; or,

When the first SCI does not meet the first condition, the first field is used to indicate the configuration information of broadcast data transmission.

Wherein, the first condition includes at least one of the following conditions:

The first SCI uses the wireless network temporary identifier (RNTI) to scramble, the first SCI uses the first RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, and the format identifier of the first SCI It is the first logo or the second logo.

Specifically, in S210, when the first terminal device needs to send data to the second terminal device, the first terminal device may send the first SCI to the second terminal device, and the first SCI may be SC1 (first stage SCI)) . In the following description, the first SCI may be SCI1 as an example for description. Wherein, the manner in which the first terminal device sends data to the second terminal device may be a unicast data manner, a multicast data manner, or a broadcast data manner. The SCI1 includes the first field. In this application, the first field may also be understood as the first information, or the first bit field, or the first information field. The first field may be only one field, or may be one or more fields, or, one or more information, or, one or more bit fields, or, one or more information fields.

When the mode of sending data by the first terminal device to the second terminal device is a multicast data mode, the second terminal device may be one of a group of terminal devices, and the first terminal device sends multicast data to this group of terminal devices. All terminal devices in this group of terminal devices can receive the SCI1. When the method of sending data by the first terminal device to the second terminal device is broadcast data transmission, the second terminal device may be any one of all terminal devices adjacent to the first terminal device. All terminal devices adjacent to the first terminal device can receive the SCI1.

In the embodiment of the present application, SCI1 is used to schedule unicast data transmission, multicast data transmission, or broadcast data transmission. For example, SCI1 may include information on resource occupation and so on.

It should be understood that in the first resource allocation manner, the first terminal device may first receive the DCI from the network device, and generate SCI1 according to the DCI. Or in the second resource allocation method, the first terminal device may first perform resource sensing in the resource pool according to the data it needs to send, determine the available resources, and then send the SCI1 to the second terminal device.

In S220, the first terminal device sends the first SCI to the second terminal device. For example, the first terminal device may send SCI1 to the second terminal device through the PSCCH.

In S230, the first terminal device determines whether the SCI1 satisfies the first condition.

Wherein, the first condition includes at least one of the following conditions:

SCI1 uses RNTI to scramble, SCI1 uses the first RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the format of SCI1 is the first identifier or the second identifier, and SCI1 contains the target ID (target ID ) And the target identifier corresponds to the second terminal device, the SCI1 includes the target identifier, and the target identifier corresponds to a unicast service/multicast service. Wherein, the second terminal device may be one or more terminal devices.

In this application, the target identifier can also be referred to as a destination ID, and the ID can also be referred to as an index.

The SCI1 includes a target ID (target ID) and the target ID corresponds to one or more terminal devices. It can be understood that the target ID may be the ID of the terminal device that needs to detect the SCI2. When the target ID is the ID of the terminal device that needs to detect SCI2, the ID of the terminal device can be the C-RNTI of the terminal device, or the absolute or relative identification of the terminal device in the system/multicast group, or the The ID of the terminal device may also be the truncated several bits of the C-RNTI of the terminal device.

The SCI1 includes a target identifier and the target identifier corresponds to a unicast service/multicast service, which can be understood as: implicitly matching at least one of the unicast service/multicast service. When the target identifier is implicitly matching at least one of unicast services/multicast services, there is a correspondence between the target identifier and at least one of unicast services/multicast services, or there is a corresponding relationship between the target identifier and at least one of unicast services/multicast services. Correspondence of at least one of the unicast service/multicast service group. The corresponding relationship may be pre-defined by the protocol or configured to the terminal device through high-level signaling. Wherein, the target identifier can be one or more.

In the embodiment of this application, when SCI1 uses RNTI to scramble, SCI1 uses the first RNTI or the second RNTI to scramble, the parameter of the first field in SCI1 is greater than or equal to the first threshold, and the format identifier of SCI1 is the first identifier or the first identifier. Second, when the SCI1 includes a target ID (target ID) and the target ID corresponds to the second terminal device, and the SCI1 includes a target ID and the target ID corresponds to at least one of the unicast service/multicast service satisfies, the SCI1 satisfies the first Condition, the first field in SCI1 is used to indicate the configuration information of the second SCI. The second SCI may be SCI2 (second stage SCI). In the following description, the second SCI uses SCI2 as an example. SCI2 is used to schedule unicast data transmission or multicast data transmission, that is, when the SCI1 meets the first condition, SCI1 is used to schedule unicast data transmission or multicast data transmission, which means that the second terminal device not only needs to detect SCI1, SCI2 also needs to be tested.

Optionally, when the SCI1 includes a target ID (target ID) and the target ID corresponds to the second terminal device, the second terminal device determines that it is the receiver of the SCI2 and detects the SCI2.

In this application, when the service type is unicast, SCI2 can be scrambled by the C-RNTI of the second terminal device; when the service type is multicast, SCI2 can be scrambled by the identifier of the multicast group where the second terminal is located. The identifier of the multicast group where it belongs may be the RNTI corresponding to the multicast group or the group RNTI.

In the embodiment of the present application, by using the first SCI to include a target ID and the target ID corresponds to receiving the second terminal device, it is implicitly indicated that the second SCI includes configuration information for multicast data transmission or unicast data transmission. , And instruct SCI1 to be used for unicast data transmission or for multicast data transmission, which improves the efficiency of terminal equipment to determine the data type scheduled by SCI1, which is easy to implement. In addition, the terminal device can accurately and quickly determine whether the SCI2 is used for unicast data transmission or multicast data transmission, thereby improving the efficiency of the terminal device in determining the data type scheduled by the SCI2.

When the SCI1 does not meet the first condition, for example, SCI1 is not scrambled by RNTI, SCI1 is not scrambled by the first RNTI or the second RNTI, the parameter of the first field is less than the first threshold, and the format identifier of SCI1 is not the first When the first identifier or the second identifier, the SCI1 contains a target identifier and at least one of the corresponding broadcast services of the target identifier is satisfied, the first field in the SCI1 is used to indicate the configuration information of the broadcast data transmission. That is, when SCI1 does not meet the first condition, SCI1 is used to schedule broadcast data transmission, which means that the second terminal device only needs to detect SCI1 and does not need to detect SCI2.

Optionally, when the SCI1 satisfies the first condition, since the first field in the SCI1 is used to indicate the configuration information of the SCI2, the second terminal device may detect the SCI2 according to the configuration information of the SCI2 indicated by the first field.

The side link control information transmission method provided in this application shares the first SCI (SCI1) through unicast data transmission, multicast data transmission, and broadcast data transmission. The first SCI can be shared by three services, which can reduce the first SCI (SCI1). The detection complexity of SCI. And, when the SCI1 satisfies the first condition, that is, in the unicast transmission mode or the multicast transmission mode, the first field of the first SCI is further used to indicate the related configuration information of the second SCI, and the second SCI is reduced. The detection complexity improves the efficiency of the terminal device to obtain the second SCI, saves communication resources, and improves the communication efficiency.

It should be understood that, in the embodiment of the present application, the first field (information) in the SCI1 may be a field (information) used for data scheduling. For example, the first field (information) may be the MCS indication field (information) in SCI1, the hybrid automatic repeat request (HARQ) process number field (information), and the new data indication (New data). A combination of at least one or more of the indicator, NDI) field (information), redundancy version (information), and multi-antenna-related fields (information). This application is not restricted here. By designing the first field of the first SCI, the terminal device can determine the first field more quickly, so as to determine the configuration information of the second SCI or the configuration information of broadcast data transmission according to the first field. The efficiency of obtaining the configuration information of the second SCI or the configuration information of the broadcast data transmission by the terminal device is improved, thereby improving the communication efficiency.

In some possible implementations of this application, SCI1 satisfies the first condition including:

SCI1 uses RNTI to scramble, SCI1 uses the first RNTI to scramble, SCI1 uses the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the format ID of SCI1 is the first identifier, and SCI1 contains If the target ID (target ID) corresponds to the second terminal device, the SCI1 includes the target ID, and the target ID corresponds to at least one of the unicast service/multicast service, the SCI1 satisfies the first condition.

This will be specifically described below.

Unicast data transmission, multicast data transmission, and broadcast data transmission can share SCI1. Optionally, the formats of SCI1 corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission may be the same. The format of SCI1 can be represented by the format ID (format identify, format ID) of SCI1. When unicast data transmission, multicast data transmission, and broadcast data transmission share SCI1, that is, unicast data transmission, multicast data transmission, and broadcast data transmission correspond to one SCI1, and the format identifiers of these three SCI1s can be the same, that is The format of the three SCI1 can be the same. The three SCI1s all include the first field, which is optional. The position of the first field in the three SCI1s is the same. However, the meaning/interpretation of the first field in the three SCI1 is different.

It should be understood that, in the embodiment of the present application, SCI1 scrambled by RNTI can be understood as cyclic redundancy check (cyclic redundancy check, CRC) of SCI1 scrambled by RNTI.

In the embodiment of the present application, when the SCI1 is scrambled by the RNTI, the SCI1 is used to schedule unicast data transmission or multicast data transmission. That is, there is a correspondence between using RNTI to scramble SCI1 and SCI1 for scheduling unicast data transmission or multicast data transmission, and the correspondence may be predefined or configured by signaling. When the second terminal device receives the SCI1 scrambled by the RNTI, that is, the SCI1 satisfies the first condition, it can determine that the received SCI1 is used for scheduling unicast data transmission or multicast data transmission. In addition, it can also be determined that the first field is used to indicate the configuration information of the SCI2, and the second terminal device needs to detect the SCI2. SCI2 is used to schedule unicast data transmission or multicast data transmission.

In the embodiment of the present application, the second terminal device may not determine whether the received SCI1 is used for scheduling unicast data transmission/multicast data transmission/broadcast data transmission, that is, the second terminal may directly determine whether the SCI2 needs to be detected. Therefore, in each embodiment of the present application, it can be determined whether SCI2 needs to be detected according to whether SCI1 meets the first condition. That is, the second terminal device is receiving the SCI1, and the SCI1 meets the first condition, it can be determined that the first field is used to indicate the configuration information of the SCI2, and the second terminal device needs to detect the SCI2.

When the terminal device receives the SCI1 scrambled by the RNTI, it can determine that the SCI1 is used for unicast data transmission or multicast data transmission. The data transmission mode between the first terminal device and the second terminal device is a unicast data transmission mode or a multicast transmission mode. The second terminal device may determine the configuration information of the SCI2 according to the first field of the SCI1, and detect the SCI2 according to the configuration information of the SCI2. After obtaining the SCI1 and SCI2, the second terminal device can correctly receive the unicast data or the multicast data sent by the first terminal device.

Optionally, in the embodiment of the present application, further, when the SCI1 uses a specific first RNTI for scrambling, the SCI1 is used for unicast data transmission. The first RNTI is used to indicate that the SCI1 is used for unicast data transmission, that is, there is a correspondence between the first RNTI and the SCI1 used for unicast data transmission, and the correspondence may be predefined or configured by signaling. For example, the first RNTI may be a universal terrestrial radio access network temporary identifier (U-RNTI), or the first RNTI may be a cell network temporary identifier (C-RNTI), or the first RNTI may be a cell network temporary identifier (C-RNTI). An RNTI is a unicast radio network temporary identifier (U-RNTI). When the second terminal device receives the SCI1 scrambled by the first RNTI, that is, the SCI1 satisfies the first condition, it can determine that the received SCI1 is used for unicast data transmission. In addition, it can also be determined that the first field is used to indicate the configuration information of the SCI2, and the second terminal device needs to detect the SCI2.

In the embodiment of the present application, the first RNTI is used to implicitly indicate that SCI2 includes configuration information for unicast data transmission, and the second RNTI is used to implicitly indicate that SCI2 includes configuration information for multicast data transmission, which is easy to implement and can make the terminal equipment accurate Quickly determine whether SCI2 is used for unicast data transmission or multicast data transmission, and improve the efficiency of terminal equipment to determine the data type scheduled by SCI2.

Optionally, when the SCI1 includes a target ID (target ID) and the target ID corresponds to the second terminal device, the second terminal determines that it is the receiver of the SCI2 and detects the SCI2.

Optionally, the target identifier corresponding to the second terminal device may be referred to as the first target identifier.

When SCI1 uses the first RNTI to scramble, SCI2 is used to schedule unicast data transmission. That is, there may be a correspondence between the first RNTI and the SCI2 used to schedule unicast data transmission. The corresponding relationship may also be predefined or configured by signaling.

When the terminal device receives the SCI1 scrambled by the first RNTI, it can determine that the SCI1 is used for unicast data transmission, and the first field of the SCI1 is used to indicate the configuration information of the SCI2 used to schedule the unicast data transmission. The data transmission mode between the first terminal device and the second terminal device is a unicast data transmission mode. The second terminal device may determine the configuration information of the SCI2 for scheduling unicast data transmission according to the first field of the SCI1, and detect the SCI2 according to the configuration information of the SCI2. After obtaining the SCI1 and SCI2, the second terminal device can correctly receive the unicast data sent by the first terminal device.

That is to say, when SCI1 uses the first RNTI to scramble, SCI1 is about unicast data transmission. SCI1 contains the transmission resources for the unicast data transmission. SCI1 also contains the priority information of the unicast data transmission.

In the embodiment of the present application, when the SCI1 uses a specific second RNTI for scrambling, the SCI1 is used for multicast data transmission. The second RNTI is used to indicate that the SCI1 is used for multicast data transmission, that is, there is a corresponding relationship between the second RNTI and the SCI1 used for multicast data transmission, and the corresponding relationship may be predefined or configured by signaling. For example, the second RNTI may be a group radio network temporary identifier (G-RNTI). When the second terminal device receives the SCI1 scrambled by the second RNTI, that is, the SCI1 satisfies the first condition, it can determine that the received SCI1 is used for multicast data transmission. In addition, it can also be determined that the first field is used to indicate the configuration information of the SCI2, and the second terminal device needs to detect the SCI2.

When SCI1 uses the second RNTI to scramble, SCI2 is used to schedule multicast data transmission. That is, there may be a correspondence between the second RNTI and the SCI2 used to schedule multicast data transmission. The corresponding relationship may also be predefined or configured by signaling.

When receiving the SCI1 scrambled by the second RNTI, the terminal device can determine that the SCI1 is used for multicast data transmission, and the first field of the SCI1 is used to indicate the configuration information of the SCI2 used for scheduling the multicast data transmission. That is, the method for the first terminal device to send data to the second terminal device is a multicast method. The second terminal device may determine the configuration information of the SCI2 for scheduling multicast data transmission according to the first field of the SCI1, and detect the SCI2 according to the configuration information of the SCI2. After obtaining the SCI1 and SCI2, the second terminal device can correctly receive the multicast data sent by the first terminal device.

That is, when the SCI1 uses the second RNTI to scramble, the SCI1 is related to multicast data transmission. The SCI1 contains the transmission resources of the multicast data transmission. SCI1 also contains the priority information of the multicast data transmission.

In the embodiment of the present application, the first RNTI is used to implicitly indicate that SCI1 is used for unicast data transmission, and the second RNTI is used to implicitly indicate that SCI1 is used for multicast data transmission, which is easy to implement and can make the terminal device accurately and quickly determine Whether SCI is used for unicast data transmission or multicast data transmission, it improves the efficiency of terminal equipment to determine the data type scheduled by SCI11.

Optionally, when SCI1 contains a target identifier and the target identifier corresponds to a multicast service, the second terminal device determines whether it belongs to a multicast service, and if it belongs to a multicast service, determines that it is the receiver of SCI2, and detects SCI2.

Optionally, when the SCI1 contains the target identifier and the target identifier corresponds to the group of the multicast service, the second terminal device determines whether it belongs to the group of the multicast service, and if it belongs to the group, determines that it is the receiver of the SCI2, and Test SCI2.

In the embodiment of the present application, by using SCI1 to include a target ID and the target ID corresponds to a unicast service or a multicast service, it is implicitly indicated that SCI2 includes configuration information for multicast data transmission or is for unicast data transmission. The configuration information is easy to implement, which enables the terminal device to accurately and quickly determine whether the SCI2 is used for unicast data transmission or multicast data transmission, and improves the efficiency of the terminal device in determining the data type scheduled by the SCI2.

Optionally, the target identifier corresponding to the multicast service or the unicast service may be referred to as the second target identifier.

Optionally, in this embodiment, when SCI1 is not scrambled by RNTI, SCI1 is not scrambled by first RNTI or second RNTI, and the parameter of the first field in SCI1 is less than the first threshold, the format identifier of SCI1 is not The first identification or the second identification, SCI1 contains a target identification (target ID) but the target identification does not correspond to the second terminal device, SCI1 contains a target identification but the target identification does not correspond to a unicast service/multicast service, and SCI1 does not contain a target identification When at least one of the (target ID) is satisfied, the SCI1 received by the second terminal device does not satisfy the first condition. The SCI1 is used for broadcast data transmission. That is, SCI1 does not use the first RNTI, SCI1 does not use the second RNTI to scramble, and SCI1 does not use RNTI to scramble, SCI1 contains the target ID but the target ID does not correspond to the second terminal device, SCI1 contains the target ID but the The target ID does not correspond to the unicast service/multicast service, the SCI1 does not include one or more of the target IDs (target ID), and there is a correspondence between the SCI1 used for broadcast data transmission. The correspondence can be predefined or Signaling configuration. When the SCI1 does not meet the first condition, it can be determined that the received SCI1 is used for broadcast data transmission. The second terminal device does not need to detect SCI2. The first field is used to indicate the configuration information of broadcast data transmission.

When SCI1 is not scrambled by RNTI, SCI1 is not scrambled by the first RNTI, or SCI1 is not scrambled by the second RNTI, the first field is used to broadcast the configuration information of data transmission. That is, there may be a correspondence between SCI1 not using the first RNTI, SCI1 not using the second RNTI for scrambling, or SCI1 not using the RNTI for scrambling, and the configuration information of the first field for indicating broadcast data transmission. The corresponding relationship may also be predefined or configured by signaling.

In the embodiment of this application, whether SCI1 meets the first condition is judged by using whether SCI1 is scrambled by RNTI, whether SCI1 is scrambled by first RNTI or second RNTI, or whether SCI1 contains a target identifier, which is easy to implement and can make the first Second, the terminal equipment accurately and quickly determines whether SCI1 meets the first condition, and improves the efficiency and accuracy of determining whether SCI1 meets the first condition.

Optionally, the configuration information of the broadcast data transmission may include the resource information of the broadcast data transmission and so on. For example, when the first field is the MCS indication field, the MCS indication field is used to indicate the MCS during broadcast data transmission. When the first field is the HARQ process number field, the HARQ process number field is used to indicate the number of HARQ processes during broadcast data transmission. When the first field is the NDI field, the NDI field is used to indicate the NDI during broadcast data transmission.

When the second terminal device receives SCI1 that is not scrambled by the first RNTI, the second RNTI, or is not scrambled by the RNTI, it can determine that the SCI1 is used for broadcast data transmission, and the first field of the SCI1 is used to indicate Configuration information for scheduling broadcast data transmission. That is, the method for the first terminal device to send data to the second terminal device is a broadcast method. The second terminal device can determine the relevant configuration information for scheduling broadcast data transmission according to the SCI1, and then can correctly receive the broadcast data sent by the first terminal device.

In the example of this application, the formats (format identifiers) of SCI1 corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission are the same. By using different RNTI scrambling methods to distinguish SCI1 corresponding to different service types, the accuracy is High, easy to implement, can reduce the payload size of SCI1, and reduce the complexity of SCI1 detection.

For example, when the first field is a 5-bit MCS indicator field, if SCI1 is scrambled by the first RNTI, the first bit in the 5-bit MCS indicator field can be used to indicate the format identifier of SCI2, and the remaining four-bit field (No. The second to fifth bit fields) can be used to indicate the aggregation level of SCI2.

FIG. 4 is a schematic diagram of SCI1 corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission in an embodiment of the application. It can be seen from Figure 4 that the formats of SCI1 corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission are all format A (format A), and SCI1 corresponding to unicast data transmission is scrambled by U-RNTI. SCI1 corresponding to multicast data transmission is scrambled with G-RNTI, and SCI1 corresponding to broadcast data transmission is not scrambled with RNTI. The three types of SCI1 all include a time-frequency resource indicator field and a QoS indicator (such as PPPP) field. For unicast data transmission and multicast data transmission, the MCS indication field in SCI1 is used as the first field, which is used to indicate the configuration information of scheduling unicast data transmission SCI2 (such as the format ID of SCI2) and scheduling multicast data transmission. SCI2 configuration information (for example, SCI2 format ID).

Optionally, in some embodiments of the present application, when the parameter of the first field in SCI1 is greater than or equal to the first threshold, SCI1 also meets the first condition. The parameter of the first field may be understood as the index value (index) of the first field, the value corresponding to the first field, the parameter value corresponding to the first field, or the value of the first field. That is, when the parameter of the first field in SCI1 is greater than or equal to the first threshold, SCI1 is used to schedule unicast data transmission or multicast data transmission. In addition, it can also be determined that the first field is used to indicate the configuration information of the SCI2, and the second terminal device needs to detect the SCI2. SCI2 is used to schedule unicast data transmission or multicast data transmission. The first threshold may be configured by signaling or predefined.

When the parameter of the first field in SCI1 received by the second terminal device is greater than or equal to the first threshold, it can be determined that SCI1 is used for unicast data transmission or multicast data transmission, and the first field of SCI1 is used to indicate SCI2 configuration information for scheduling unicast data transmission or multicast data transmission. The method for the first terminal device to send data to the second terminal device is a unicast method or a multicast method. The second terminal device may determine the configuration information of the SCI2 for scheduling unicast data transmission or multicast data transmission according to the first field of the SCI1, and detect the SCI2 according to the configuration information of the SCI2. After obtaining the SCI1 and SCI2, the second terminal device can correctly receive the unicast data or the multicast data sent by the first terminal device.

If the SCI1 received by the second terminal device does not meet the first condition, for example, when the parameter of the first field in the SCI1 is less than the first threshold, the SCI1 is used for broadcast data transmission. That is, there is a correspondence between the parameter of the first field in the SCI1 being less than the first threshold and the SCI1 being used for broadcast data transmission, and the correspondence may be predefined or configured by signaling. When the second terminal device receives that the parameter of the first field in the SCI1 is less than the first threshold, that is, the SCI1 does not meet the first condition, it can determine that the received SCI1 is used for broadcast data transmission. The second terminal device does not need to detect SCI2.

When the parameter of the first field in the SCI1 is less than the first threshold, the first field is used to broadcast the configuration information of data transmission. That is, when the parameter of the first field in the SCI1 is less than the first threshold, there may be a correspondence between the configuration information used for indicating the broadcast data transmission in the first field. The corresponding relationship may also be predefined or configured by signaling.

In the embodiment of the present application, it is easy to realize that the SCI1 satisfies the first condition by using the parameter of the first field in the SCI1 to be greater than or equal to the first threshold, and the complexity of the first condition is low. The terminal device can accurately and quickly determine that the SCI1 satisfies the first condition, and improve the efficiency and accuracy of determining that the SCI1 satisfies the first condition.

Optionally, "less than" in the embodiments of the present application can be replaced with "less than or equal to", and "greater than or equal to" can also be replaced with "greater than".

When the parameter of the first field in the SCI1 received by the second terminal device is less than the first threshold, it may be determined that the SCI1 is used for broadcast data transmission, and the first field of the SCI1 is used to indicate configuration information for scheduling broadcast data transmission. That is, the method for the first terminal device to send data to the second terminal device is a broadcast method. The second terminal device can determine the relevant configuration information for scheduling broadcast data transmission according to the SCI1, and then can correctly receive the broadcast data sent by the first terminal device.

Optionally, when the parameter of the first field is greater than or the first threshold, there is a correspondence between the parameter of the first field and the configuration information of the SCI2. For example, a matching relationship table can be pre-configured or pre-defined. The table contains the corresponding relationship between the parameters of the first field and the configuration information of SCI2. The configuration information of SCI2 can include the format ID, aggregation level, and resource area of SCI2. One or more of the identification (source zone ID), the distance limit that needs to be fed back, and HARQ options. Wherein, the distance limitation required for feedback can be understood as: in a certain distance range from the first terminal device, terminal devices in the same group within the range need to perform HARQ feedback. Optionally, when the parameter of the first field included in the SCI1 is greater than or the first threshold, the second terminal determines that it is the receiver of the SCI2, and detects the SCI2.

Since there is a correspondence between the parameters of the first field and the configuration information of the second SCI, the terminal device can quickly and accurately determine the configuration information of the second SCI according to the parameters of the first field, which improves the efficiency of determining the second SCI.

When the first field is the MCS indication field, optionally, as a possible implementation manner, reserved bits in the MCS table can be used to indicate the configuration information of SCI2 for scheduling unicast data transmission or scheduling multicast data transmission.

Optionally, as another possible implementation manner, the current MCS table can be revised to Table 4, where Table 5 contains MCS, redundancy version (RV) and index when MCS is less than the first threshold. The corresponding relationship between and includes the corresponding relationship between the configuration information of the SCI2 (for example, the format ID and the aggregation level of the SCI2) and the index when the packet is greater than or equal to the first threshold.

Table 4

Index	MCS	RV version
1	BPSK	0
2	QPSK	0
3	64QAM	0
…	To	To
X	Format ID	Aggregation level
X+1	0	8
X+2	1	8
…	To	To
N	1	8

Among them, QPSK is quadrature phase shift keying (quadrature phase shift keying, QPSK)/BPSK binary phase shift keying is (Binary Phase Shift Keying, BPSK), 64QAM is 64 quadrature amplitude modulation (64 quadrature amplitude modulation, 64QAM) , These types are different modulation methods.

In Table 4, the first threshold is X and the parameter of the first field is index. When the index of the first field is less than X, that is, SCI1 does not meet the first condition, the SCI1 is used for broadcast data transmission, and the first field is used to indicate MCS and RV for broadcast data transmission. When the index of the first field is greater than X, that is, SCI1 meets the first condition, and SCI1 is used to schedule unicast data transmission or multicast data transmission. The first field is used to indicate the configuration information of SCI2. For example, the first field indicates the format ID and aggregation level of SCI2. SCI2 is used to schedule unicast data transmission or multicast data transmission.

It should be understood that Table 4 is only exemplary, and should not impose any restrictions on the parameters of the first field, the first threshold, and the configuration information of SCI2 in this application.

Optionally, in the embodiment of the present application, when the parameter of the first field is greater than or the first threshold, the first bit of the first field may be used to indicate whether the SCI1 is used for scheduling unicast data transmission or not. In order to schedule multicast data transmission, it then indicates whether SCI2 is used to schedule unicast data transmission or to schedule multicast data transmission. For example, if the first bit of the first field is 0, it means that SCI1 is used to schedule unicast data transmission, and SCI2 is used to schedule unicast data transmission. The first bit of the first field is 1, indicating that SCI1 is used to schedule multicast data transmission, and SCI2 is used to schedule multicast data transmission. Or, if the first bit of the first field is 1, it means that SCI1 is used to schedule unicast data transmission, and SCI2 is used to schedule unicast data transmission. The first bit of the first field is 0, which means that SCI1 is used to schedule multicast data transmission, and SCI2 is used to schedule multicast data transmission.

By using whether the parameter of the first field in SCI1 is greater than the first threshold to determine whether SCI1 satisfies the first condition, it is easy to implement, which enables the second terminal device to accurately and quickly determine whether SCI1 satisfies the first condition, and improves the determination of whether SCI1 satisfies the first condition. The efficiency and accuracy of a condition.

It should be understood that in the embodiment of the present application, other methods may be used to determine whether the parameter of the first field is greater than or the first threshold, whether SCI1 is used for scheduling unicast data transmission or for scheduling multicast data transmission, thereby indicating SCI2 Whether it is used to schedule unicast data transmission or to schedule multicast data transmission. This application is not restricted here.

In the example of this application, the formats of SCI1 corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission are the same, and the SCI1 corresponding to different service types can be distinguished by comparing the parameters of the first field in SCI1 with the first threshold. , High accuracy, easy to implement, can reduce the load (payload size) of SCI1, and reduce the complexity of SCI1 detection.

It should be understood that in the example of this application, when comparing the parameters of the first field in SCI1 with the first threshold to distinguish SCI1 corresponding to different service types, SCI1 can use the first RNTI to scramble or use the second RNTI to scramble. Disturb. Or, SCI1 may not be scrambled by RNTI, SCI1 may not be scrambled by the first RNTI, or by the second RNTI. This application is not restricted here.

Optionally, in this embodiment of the present application, unicast data transmission, multicast data transmission, and broadcast data transmission may share SCI1. Optionally, the formats of the three SCI1s corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission may be different, but the payload size of the three SCI1s is the same. That is, different SCI1 formats are used to distinguish SCI1 corresponding to different business types. The three types of SCI1 all include the first field, and the position of the first field in the three types of SCI1 is the same.

In the embodiment of the present application, when the format ID of the SCI1 received by the second terminal device is the first identifier, that is, the SCI1 satisfies the first condition. Since the first identifier is an SCI format identifier corresponding to the unicast service data, the SCI1 is used for unicast data transmission. That is, there is a corresponding relationship between the format identifier of the first identifier SCI1 and the SCI1 used for unicast data transmission, and the corresponding relationship may be predefined or configured by signaling. When the second terminal device receives the format identifier of the SCI1 as the first identifier, that is, the SCI1 satisfies the first condition, it can determine that the received SCI1 is used for unicast data transmission. In addition, it can also be determined that the first field is used to indicate the configuration information of the SCI2, and the second terminal device needs to detect the SCI2.

When the SCI1 format identifier is the first identifier, SCI2 is used to schedule unicast data transmission. That is, there may be a correspondence between the first identifier and the SCI2 used to schedule unicast data transmission. The corresponding relationship may also be predefined or configured by signaling.

When the terminal device receives the SCI1 whose format identifier is the first identifier, it can determine that the SCI1 is used for unicast data transmission, and the first field of the SCI1 is used to indicate the configuration information of the SCI2 used to schedule the unicast data transmission. The data transmission mode between the first terminal device and the second terminal device is a unicast data transmission mode. The second terminal device may determine the configuration information of the SCI2 for scheduling unicast data transmission according to the first field of the SCI1, and detect the SCI2 according to the configuration information of the SCI2. After obtaining the SCI1 and SCI2, the second terminal device can correctly receive the unicast data sent by the first terminal device. Optionally, when the second terminal device receives the SCI1 whose format identifier is the first identifier, that is, the SCI1 satisfies the first condition, it can be determined that the second terminal device needs to detect the SCI2.

In the embodiment of the present application, when the format ID of the SCI1 received by the second terminal device is the second identifier, the second identifier corresponds to the SCI format identifier of the multicast service data, that is, the format ID received by the second terminal device The format identification of SCI1 is the second identification, and SCI1 meets the first condition. Since the second identifier corresponds to the multicast service data, the SCI1 is used for multicast data transmission. That is, there is a correspondence between the SCI1 and the SCI1 whose format identifier is the second identifier used for multicast data transmission, and the correspondence may be predefined or configured by signaling. When the second terminal device receives the format identifier of the SCI1 as the second identifier, that is, the SCI1 satisfies the first condition, it can determine that the received SCI1 is used for multicast data transmission. In addition, it can also be determined that the first field is used to indicate the configuration information of the SCI2, and the second terminal device needs to detect the SCI2.

When the SCI1 format identifier is the second identifier, SCI2 is used to schedule multicast data transmission. That is, there may be a correspondence between the second identifier and the SCI2 used for scheduling multicast data transmission. The corresponding relationship may also be predefined or configured by signaling.

When the terminal device receives the SCI1 whose format identifier is the second identifier, it can determine that the SCI1 is used for multicast data transmission, and the first field of the SCI1 is used to indicate the configuration information of the SCI2 used for scheduling the multicast data transmission. The method for the first terminal device to send data to the second terminal device is a multicast method. The second terminal device may determine the configuration information of the SCI2 for scheduling multicast data transmission according to the first field of the SCI1, and detect the SCI2 according to the configuration information of the SCI2. After obtaining the SCI1 and SCI2, the second terminal device can correctly receive the multicast data sent by the first terminal device. Optionally, when the second terminal device receives the SCI1 whose format identifier is the second identifier, that is, the SCI1 satisfies the first condition, it can be determined that the second terminal device needs to detect the SCI2.

In the embodiment of the application, it is easy to realize whether SCI1 satisfies the first condition by using the format identifier in SCI1, which enables the second terminal device to accurately and quickly determine whether SCI1 satisfies the first condition and improves the determination of whether SCI1 satisfies the first condition Efficiency and accuracy.

Optionally, in this embodiment of the application, the first identifier and the second identifier may be different. For example, when used to schedule unicast data, the format identifier of SCI1 is format A, and when used to schedule unicast data, the format of SCI1 If the identifier is format B, the first identifier is A, and the second identifier is B.

If the SCI1 received by the second terminal device does not meet the first condition, for example, the format ID of the SCI1 received by the second terminal device is not the above-mentioned first and second identifiers, or in other words, the second terminal When the format ID of the SCI1 received by the device is different from the first ID and the second ID, the SCI1 is used for broadcast data transmission. That is, there is a correspondence between SCI1 and SCI1 identified in other formats for broadcast data transmission, and the correspondence may be predefined or configured by signaling. When the second terminal device receives SCI1 in other formats, that is, SCI1 does not meet the first condition, it can determine that the received SCI1 is used for broadcast data transmission. The second terminal device does not need to detect SCI2. Optionally, when the second terminal device receives SCI1 in other formats, that is, SCI1 does not meet the first condition, it may be determined that the second terminal device does not need to detect SCI2.

When the format ID in the SCI1 is not the above-mentioned first and second identifiers, the first field in the SCI1 is used to broadcast the configuration information of data transmission. That is, the first field in the SCI1 and SCI1 identified by other formats is used to indicate that there may be a correspondence between the configuration information of the broadcast data transmission. The corresponding relationship may also be predefined or configured by signaling.

When the second terminal device receives SCI1 in other formats, it can determine that SCI1 is used for broadcast data transmission, and the first field of SCI1 is used to indicate configuration information for scheduling broadcast data transmission. That is, the method for the first terminal device to send data to the second terminal device is a broadcast method. The second terminal device can determine the relevant configuration information for scheduling broadcast data transmission according to the SCI1, and then can correctly receive the broadcast data sent by the first terminal device.

Optionally, in the example of this application, unicast data transmission, multicast data transmission, and broadcast data transmission respectively correspond to SCI1 in different formats, but the payload size of the three SCI1 is the same. By using different formats (format ID) to distinguish the SCI1 corresponding to different service types, the accuracy is high, and it is easy to implement, which can reduce the load of SCI1 and reduce the complexity of SCI1 detection.

It should be understood that, in the embodiment of the present application, the SCI1 format corresponding to different service types is different, but the load can be the same. For different formats of SCI1, the information bit position configuration can be notified to the first terminal device and the second terminal device by the network device through high-level signaling, and the above information bit position configuration is the same for the three formats of SCI1. That is, the information bit position configuration in the high-level signaling can be shared to indicate the interpretation of SCI1 in three formats. In addition, in the above-mentioned different formats of SCI1, the one used for broadcast data transmission includes a first field (take the MCS field as an example) to indicate the MCS, and the MCS field with the same bit position is in the unicast/multicast SCI1 The format of is used to indicate the SCI2 format ID and aggregation level.

For example, FIG. 5 is a schematic diagram of SCI1 corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission in an embodiment of the application. It can be seen from Figure 5 that the formats of SCI1 corresponding to unicast data transmission, multicast data transmission, and broadcast data transmission are different, but the payload size is the same. The position of the first field (MCS indicator field) in the three types of SCI1 is the same. For unicast data transmission and multicast data transmission, the MCS indication field in SCI1 is used as the first field, which is used to indicate the configuration information of scheduling unicast data transmission SCI2 (such as the format ID of SCI2) and scheduling multicast data transmission. SCI2 configuration information (for example, SCI2 format ID). For broadcast data transmission, the first field is used to indicate the MCS during broadcast data transmission.

It should be understood that, in each embodiment of the present application, the configuration information of SCI2 includes:

The format ID corresponding to SCI2, the aggregation level of SCI2, the load corresponding to SCI2, the location information of SCI2, the target identifier (the target identifier corresponds to the second terminal device), the target identifier (the target identifier corresponds to unicast service/multicast At least one item in business). Through the configuration information of the second SCI including the content, the terminal device can detect the second SCI more quickly, reducing the complexity of detecting the second SCI by the terminal device, and reducing the power consumption of the terminal device.

In the embodiment of the present application, the configuration information of SCI2 may also include other information used to detect SCI2. The embodiments of the application are not limited here.

It should also be understood that, in the embodiments of the present application, when SCI1 of different formats is used to distinguish SCI1 corresponding to different service types, SCI1 of different formats may be added by using different RNTIs. For example, SCI1 corresponding to broadcast data is not scrambled using RNTI, SCI1 corresponding to unicast data is scrambled using the first RNTI, and SCI1 corresponding to multicast data is scrambled using the second RNTI.

Optionally, in this embodiment of the present application, when SCI1 of different formats is used to distinguish SCI1 corresponding to different service types, thresholds can be configured for the first field parameters in SCI1 of different formats, and the values of SCI1 of different formats are used. The relationship between the first field parameter and the corresponding threshold can also distinguish SCI1 corresponding to different service types.

It should also be understood that, in the embodiments of the present application, the predefined can be understood as defined by the protocol. The signaling configuration can be understood as configured by high-level or physical layer signaling. The high-level signaling may include, for example, radio resource control (radio resource control, RRC), medium access control (medium access control, MAC) control element (CE), and radio link control (radio link control, RLC). Signaling etc. The physical layer signaling may include, for example, DCI, SCI, and so on. In the embodiment of the present application, all the configurations configured by signaling may be configured by the network device to the terminal device through the foregoing signaling.

The side link control information transmission method provided in this application shares the SCI1 for data transmission through a unicast transmission mode, a multicast transmission mode, and a broadcast transmission mode. The SCI1 format and/or payload (payload size) corresponding to the three service types are the same, and the parameter values of the first field in RNTI, SCI1, or the format ID of SCI1 are used to distinguish SCI1 corresponding to different service types. In the unicast transmission mode or the multicast transmission mode, the field of the SCI1 is further used to indicate the relevant configuration information of the SCI2. On the one hand, SCI1 can be shared by three services, which can reduce the detection complexity of SCI1. In addition, the detection complexity of SCI2 is reduced, the efficiency of obtaining SCI2 by terminal equipment is improved, communication resources are saved, and communication efficiency is improved.

It should be understood that, in the various embodiments of the present application, the first, the second, etc. are only for ease of description. For example, the first RNTI entity and the second RNTI entity are only used to indicate different RNTIs. It should not have any influence on the RNTI itself and the number, and the above-mentioned first, second, etc. should not cause any limitation to the embodiments of the present application.

It should also be understood that the foregoing is only to help those skilled in the art to better understand the embodiments of the present application, and is not intended to limit the scope of the embodiments of the present application. Those skilled in the art can obviously make various equivalent modifications or changes based on the above examples given. For example, some steps in the various embodiments of the above method 200 may not be necessary, or some new steps may be added. Wait. Or a combination of any two or any of the above embodiments. Such a modified, changed or combined solution also falls within the scope of the embodiments of the present application.

It should also be understood that the above description of the embodiments of the present application focuses on emphasizing the differences between the various embodiments, and the same or similarities that are not mentioned can be referred to each other, and for the sake of brevity, details are not repeated here.

It should also be understood that the size of the sequence numbers of the foregoing processes does not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It should also be understood that in the embodiments of the present application, "pre-set" and "pre-defined" can be achieved by pre-saving corresponding codes, tables, or other methods that can be used to indicate related information in devices (for example, including terminals and network devices). To achieve, this application does not limit its specific implementation.

It should also be understood that the methods, situations, categories, and embodiments in the embodiments of the present application are only for convenience of description and should not constitute special limitations. The various methods, categories, situations, and features in the embodiments are not contradictory. Circumstances can be combined.

It should also be understood that, in the various embodiments of the present application, if there are no special instructions and logical conflicts, the terms and/or descriptions between the different embodiments are consistent and can be mutually cited. The technical features in the different embodiments According to its inherent logical relationship, it can be combined to form a new embodiment.

The method for transmitting side link control information in the embodiment of the present application has been described in detail above with reference to FIG. 1 to FIG. 5. Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to FIG. 6 to FIG. 11.

FIG. 6 shows a schematic block diagram of a communication device 300 according to an embodiment of the present application. The device 300 may correspond to the second terminal device described in the above method 200, or may be a chip or component applied to the second terminal device, and Each module or unit in the device 300 is respectively used to execute each action or processing procedure performed by the second terminal device in the above method 200.

As shown in FIG. 6, the device 300 includes a transceiver unit 310 and a processing unit 320. The transceiving unit 310 is configured to perform specific signal transceiving under the driving of the processing unit 320.

The transceiver unit 310 is configured to receive first side link control information SCI, where the first SCI includes a first field;

The processing unit 320 is configured to determine whether the first SCI satisfies the first condition;

When the first SCI satisfies the first condition, the first field is used to indicate the configuration information of the second SCI, where the second SCI is used to schedule unicast data transmission or multicast data transmission; or

When the first SCI does not meet the first condition, the first field is used to indicate the configuration information of broadcast data transmission;

Wherein, the first condition includes at least one of the following conditions:

The first SCI uses the wireless network temporary identification RNTI to scramble, the first SCI uses the first wireless network temporary identification RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the first SCI The format identifier is the first identifier or the second identifier.

The communication device provided by the present application shares the first SCI through unicast data transmission, multicast data transmission, and broadcast data transmission. The first SCI can be shared by three types of services, which can reduce the detection complexity of the first SCI. And, when the SCI1 satisfies the first condition, that is, in the unicast transmission mode or the multicast transmission mode, the first field of the first SCI is further used to indicate the related configuration information of the second SCI, and the second SCI is reduced. The detection complexity improves the efficiency of the terminal device to obtain the second SCI, saves communication resources, and improves the communication efficiency.

Optionally, in some embodiments of the present application, that the first SCI satisfies the first condition includes:

The first SCI uses RNTI to scramble, the first SCI uses the first RNTI to scramble, the first SCI uses the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the format ID of the first SCI ) Is the first identifier, the first SCI includes a target ID (target ID) and the target identifier corresponds to the terminal device that receives the first SCI, the first SCI includes the target identifier, and the target identifier corresponds to the unicast service/multicast service If at least one is satisfied, the first SCI meets the first condition.

Optionally, in some embodiments of the present application, when the first SCI uses the first RNTI for scrambling, the first RNTI is used to indicate that the first SCI is used for unicast data transmission; or

When the first SCI uses the second RNTI to scramble, the second RNTI is used to indicate that the first SCI is used for multicast data transmission.

Optionally, in some embodiments of the present application, when the first SCI uses the first RNTI to scramble, the first field is used to indicate configuration information of the second SCI used to schedule unicast data transmission; or

When the first SCI scrambles by using the second RNTI, the first field is used to indicate the configuration information of the second SCI used for scheduling multicast data transmission.

Optionally, in some embodiments of the present application, when the parameter of the first field is greater than or equal to the first threshold, there is a correspondence between the parameter of the first field and the configuration information of the second SCI.

Optionally, in some embodiments of the present application, when the format identifier of the first SCI is the first identifier, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

When the format identifier of the first SCI is the second identifier, the first field is used to indicate the configuration information of the second SCI used for scheduling multicast data transmission.

Optionally, in some embodiments of the present application, in a possible implementation of the first aspect, the failure of the first SCI to meet the first condition includes: the first SCI does not use RNTI scrambling, and the first SCI does not use the first SCI. One RNTI scrambling, the first SCI is not scrambled by the second RNTI, the parameter of the first field is less than the first threshold, the format ID of the first SCI is not the first identifier or the second identifier, the first SCI Contains the target ID (target ID) but the target ID does not correspond to the terminal device that receives the first SCI, the first SCI contains the target ID but the target ID does not correspond to the unicast service/multicast service, and the first SCI does not include the target ID If at least one of is satisfied, the first SCI does not meet the first condition.

Optionally, in some embodiments of the present application, the configuration information of the second SCI includes:

At least one of the format corresponding to the second SCI, the aggregation level of the second SCI, the load corresponding to the second SCI, or the location information of the second SCI.

Optionally, in some embodiments of the present application, the first field includes:

Modulation and coding MCS indicator field, hybrid automatic repeat request HARQ process number indicator field, new data indicator field, redundancy version indicator field or multi-antenna related indicator field at least one or a combination of multiple.

Further, the device 300 may also include a storage unit, and the transceiver unit 310 may be a transceiver, an input/output interface, or an interface circuit. The storage unit is used to store instructions executed by the transceiver unit 310 and the processing unit 320. The transceiving unit 310, the processing unit 320, and the storage unit are coupled with each other. The storage unit stores instructions, the processing unit 320 is used to execute the instructions stored in the storage unit, and the transceiving unit 310 is used to perform specific signal transceiving under the driving of the processing unit 320.

It should be understood that the specific process for each unit in the apparatus 300 to perform the above-mentioned corresponding steps please refer to the foregoing description in conjunction with the method 200 and the related embodiment of the second terminal device in FIG. 3. For the sake of brevity, details are not repeated here.

Optionally, the transceiving unit 310 may include a receiving unit (module) and a sending unit (module), which are used to execute each embodiment of the aforementioned method 200 and the second terminal device in the embodiment shown in FIG. 3 receives information and sends information. step.

It should be understood that the transceiver unit 310 may be a transceiver, an input/output interface, or an interface circuit. The storage unit may be a memory. The processing unit 320 may be implemented by a processor. As shown in FIG. 7, the communication device 400 may include a processor 410, a memory 420, a transceiver 430, and a bus system 440. The various components of the communication device 400 are coupled together through a bus system 440, where the bus system 440 may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. However, for the sake of clear description, various buses are marked as the bus system 440 in FIG. 7. For ease of illustration, FIG. 7 is only schematically drawn.

The communication device 300 shown in FIG. 6 or the communication device 400 shown in FIG. 7 can implement the various embodiments of the foregoing method 200 and the steps performed by the second terminal device in the embodiment shown in FIG. 3. For similar descriptions, reference can be made to the descriptions in the aforementioned corresponding methods. To avoid repetition, I won’t repeat them here.

It should also be understood that the communication device 300 shown in FIG. 6 or the communication device 400 shown in FIG. 7 may be a terminal device.

FIG. 8 shows a schematic block diagram of a communication device 500 according to an embodiment of the present application. The device 500 may correspond to the second terminal device described in the above method 200, or may be a chip or component applied to the first terminal device, and, Each module or unit in the device 500 is respectively used to execute each action or processing procedure performed by the first terminal device in the above method 200.

As shown in FIG. 8, the device 500 may include a processing unit 510 and a transceiving unit 520. The transceiving unit 520 is configured to perform specific signal transceiving under the driving of the processing unit 510.

The processing unit 510 is configured to generate first side uplink control information SCI, where the first SCI includes a first field;

The transceiver unit 520 is configured to send the first SCI;

Wherein, when the first SCI satisfies the first condition, the first field is used to indicate the configuration information of the second SCI, and the second SCI is used to schedule unicast data transmission or multicast data transmission; or

When the first SCI does not meet the first condition, the first field is used to indicate the configuration information of the broadcast data transmission;

The first condition includes at least one of the following conditions:

The first SCI uses the wireless network temporary identifier RNTI to scramble, the first SCI uses the first RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, and the format identifier of the first SCI is the first One logo or second logo.

The communication device provided in the present application shares the first SCI through unicast data transmission, multicast data transmission, and broadcast data transmission, and the communication device sends the first SCI. The first SCI can be shared by the three services, which can reduce the detection complexity of the first SCI. And, when the SCI1 satisfies the first condition, that is, in the unicast transmission mode or the multicast transmission mode, the first field of the first SCI is further used to indicate the related configuration information of the second SCI, and the second SCI is reduced. The detection complexity improves the efficiency of the terminal device to obtain the second SCI, saves communication resources, and improves the communication efficiency.

Optionally, in some embodiments of the present application, that the first SCI satisfies the first condition includes:

The first SCI uses RNTI to scramble, the first SCI uses the first RNTI to scramble, the first SCI uses the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the format ID of the first SCI ) Is the first identifier, the first SCI includes a target ID (target ID) and the target identifier corresponds to the terminal device that receives the first SCI, the first SCI includes the target identifier, and the target identifier corresponds to the unicast service/multicast service If at least one is satisfied, the first SCI meets the first condition.

Optionally, in some embodiments of the present application, when the first SCI uses the first RNTI for scrambling, the first RNTI is used to indicate that the first SCI is used for unicast data transmission; or

When the first SCI scrambles by using the first RNTI, the second RNTI is used to indicate that the first SCI is used for multicast data transmission.

Optionally, in some embodiments of the present application, when the first SCI uses the first RNTI to scramble, the first field is used to indicate configuration information of the second SCI used to schedule unicast data transmission; or

When the first SCI scrambles by using the second RNTI, the first field is used to indicate the configuration information of the second SCI used for scheduling multicast data transmission.

Optionally, in some embodiments of the present application, when the parameter of the first field is greater than or equal to the first threshold, there is a correspondence between the parameter of the first field and the configuration information of the second SCI.

Optionally, in some embodiments of the present application, when the format identifier of the first SCI is the first identifier, the first field is used to indicate the configuration information of the second SCI for scheduling unicast data transmission ;or

When the format identifier of the first SCI is the second identifier, the first field is used to indicate the configuration information of the second SCI used for scheduling multicast data transmission.

Optionally, in some embodiments of the present application, that the first SCI does not meet the first condition includes:

The first SCI is not scrambled by RNTI, the first SCI is not scrambled by the first RNTI, the first SCI is not scrambled by the second RNTI, the parameter of the first field is less than the first threshold, the format identifier of the first SCI (format ID) is not the first identification or the second identification, the first SCI contains a target ID but the target ID does not correspond to the terminal device that receives the first SCI, the first SCI contains the target ID but the target ID does not correspond to the single If at least one of the broadcast service/multicast service and the first SCI does not contain the target identifier is satisfied, the first SCI does not satisfy the first condition.

Optionally, in some embodiments of the present application, the configuration information of the second SCI includes:

At least one of the format corresponding to the second SCI, the aggregation level of the second SCI, the load corresponding to the second SCI, or the location information of the second SCI.

Optionally, in some embodiments of the present application, the first field includes:

Modulation and coding MCS indicator field, hybrid automatic repeat request HARQ process number indicator field, new data indicator field, redundancy version indicator field or multi-antenna related indicator field at least one or a combination of multiple.

Further, the device 500 may also include a storage unit, and the transceiving unit 520 may be a transceiver, an input/output interface, or an interface circuit. The storage unit is used to store instructions executed by the transceiver unit 520 and the processing unit 510. The transceiving unit 520, the processing unit 510, and the storage unit are coupled to each other, the storage unit stores instructions, the processing unit 510 is used to execute the instructions stored in the storage unit, and the transceiving unit 520 is used to perform specific signal transceiving under the driving of the processing unit 510.

It should be understood that, for the specific process of each unit in the apparatus 500 performing the above corresponding steps, please refer to the previous description in conjunction with the method 200 and the first terminal device in the related embodiment in FIG. 5, and for the sake of brevity, it will not be repeated here.

Optionally, the transceiving unit 520 may include a receiving unit (module) and a sending unit (module), which are used to execute each embodiment of the foregoing method 200 and the first terminal device in the embodiment shown in FIG. 5 to receive information and send information. step.

It should be understood that the transceiving unit 520 may be a transceiver, an input/output interface, or an interface circuit. The storage unit may be a memory. The processing unit 520 may be implemented by a processor. As shown in FIG. 9, the communication device 600 may include a processor 610, a memory 620, a transceiver 630, and a bus system 660. The components of the communication device 600 are coupled together through a bus system 660, where the bus system 660 may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. However, for the sake of clear description, various buses are marked as the bus system 440 in FIG. 9. For ease of presentation, FIG. 9 is only schematically drawn.

The communication device 500 shown in FIG. 8 or the communication device 600 shown in FIG. 6 can implement the various embodiments of the foregoing method 200 and the steps performed by the second terminal device in the embodiment shown in FIG. 3. For similar descriptions, reference can be made to the descriptions in the aforementioned corresponding methods. To avoid repetition, I won’t repeat them here.

It should also be understood that the communication device 500 shown in FIG. 8 or the communication device 600 shown in FIG. 9 may be a terminal device.

It should also be understood that the division of units in the above device is only a division of logical functions, and may be fully or partially integrated into one physical entity in actual implementation, or may be physically separated. In addition, the units in the device can be all implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; part of the units can also be implemented in the form of software called by the processing elements, and some of the units can be implemented in the form of hardware. For example, each unit can be a separate processing element, or it can be integrated in a certain chip of the device for implementation. In addition, it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device. Features. Here, the processing element may also be called a processor, and may be an integrated circuit with signal processing capability. In the implementation process, each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or implemented in a form of being called by software through a processing element.

In an example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (ASIC), or, one or Multiple digital signal processors (digital signal processors, DSP), or, one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuits. For another example, when the unit in the device can be implemented in the form of a processing element scheduler, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call programs. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

FIG. 10 is a schematic structural diagram of a terminal device 700 provided by this application. The foregoing apparatus 300, 400, 500, or 600 may be configured in the terminal device 700, or the apparatus 300, 400, 500, or 600 itself may be the terminal device 700. In other words, the terminal device 700 may execute the actions performed by the first terminal device or the second terminal device in the above method 200.

For ease of description, FIG. 10 only shows the main components of the terminal device. As shown in FIG. 10, the terminal device 700 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

The processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program. For example, it is used to support the terminal device to execute the above-mentioned transmission precoding matrix instruction method embodiment. The described action. The memory is mainly used to store software programs and data, for example, to store the codebook described in the above embodiments. The control circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for ease of description, FIG. 10 only shows a memory and a processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.

For example, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processing unit is mainly used to control the entire terminal device, execute software programs, and process software programs. data. The processor in FIG. 10 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected by technologies such as a bus. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and the various components of the terminal device may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Exemplarily, in the embodiment of the present application, the antenna and control circuit with the transceiver function may be regarded as the transceiver unit 701 of the terminal device 700, and the processor with the processing function may be regarded as the processing unit 702 of the terminal device 700. As shown in FIG. 7, the terminal device 700 includes a transceiving unit 701 and a processing unit 702. The transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, and so on. Optionally, the device for implementing the receiving function in the transceiving unit 701 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiving unit 701 can be regarded as the sending unit, that is, the transceiving unit 701 includes a receiving unit and a sending unit. Exemplarily, the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc., and the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.

FIG. 11 is a schematic structural diagram of another terminal device 800 provided by this application. In FIG. 11, the terminal device includes a processor 810, a data sending processor 820, and a data receiving processor 830. The processing unit 320 or the processing unit 510 in the foregoing embodiment may be the processor 810 in FIG. 11 and perform corresponding functions. The transceiving unit 310 in the foregoing embodiment may be the sending data processor 820 and/or the receiving data processor 830 in FIG. 11. Although the channel encoder and the channel decoder are shown in FIG. 11, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are only illustrative.

It should be understood that, in the embodiments of the present application, the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and application-specific integrated circuits. (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of random access memory (RAM) are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), and synchronous dynamic random access memory (DRAM). Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The foregoing embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instruction may be transmitted from a website, a computer, a server, or a data center through a cable (For example, infrared, wireless, microwave, etc.) to transmit to another website, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium may be a solid state drive.

An embodiment of the present application also provides a communication system, which includes: the above-mentioned first terminal device and the above-mentioned second terminal device. Optionally, the communication system may also include network equipment.

The embodiment of the present application also provides a computer-readable medium for storing computer program code, and the computer program includes instructions for executing the method 200 for sidelink control information transmission in the embodiment of the present application. The readable medium may be a read-only memory (ROM) or a random access memory (RAM), which is not limited in the embodiment of the present application.

This application also provides a computer program product. The computer program product includes instructions. When the instructions are executed, the first terminal device and the second terminal device respectively execute the first terminal device and the second terminal device corresponding to the above method. Operation of terminal equipment.

The embodiment of the application also provides a chip, the chip includes: a processor, used to call and run a computer program from the memory, so that the first terminal device and the second terminal device installed with the chip respectively execute the method corresponding to the above The operation of the first terminal device and the second terminal device.

The embodiment of the present application also provides a system chip. The system chip includes a processing unit and a communication unit. The processing unit may be, for example, a processor, and the communication unit may be, for example, an input/output interface, a pin, or a circuit. The processing unit can execute computer instructions, so that the chip in the communication device executes any of the methods for transmitting sidelink control information provided in the foregoing embodiments of the present application.

Optionally, any communication device provided in the foregoing embodiments of the present application may include the system chip.

Optionally, the computer instructions are stored in a storage unit.

Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit can also be a storage unit in the terminal located outside the chip, such as a ROM or other storage units that can store static information and instructions. Types of static storage devices, RAM, etc. Wherein, the processor mentioned in any of the above can be a CPU, a microprocessor, an ASIC, or one or more integrated circuits used for program execution of the method for controlling the above-mentioned main system information transmission. The processing unit and the storage unit can be decoupled, respectively set on different physical devices, and connected in a wired or wireless manner to realize the respective functions of the processing unit and the storage unit, so as to support the system chip to implement the above-mentioned embodiments Various functions in. Alternatively, the processing unit and the memory may also be coupled to the same device.

It can be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of random access memory (RAM) are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), and synchronous dynamic random access memory (DRAM). Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The terms "system" and "network" in this article are often used interchangeably in this article. The term "and/or" in this article is only an association relationship describing the associated objects, which means 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, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

The terms "uplink" and "downlink" appearing in this application are used to describe the direction of data/information transmission in a specific scenario. For example, the "uplink" direction generally refers to the direction or distribution of data/information from the terminal to the network side. The direction of transmission from the centralized unit to the centralized unit. The "downlink" direction generally refers to the direction in which data/information is transmitted from the network side to the terminal, or the direction in which the centralized unit transmits to the distributed unit. It can be understood that "uplink" and "downlink" "It is only used to describe the direction of data/information transmission, and the specific start and end equipment of the data/information transmission is not limited.

Various messages/information/equipment/network elements/systems/devices/actions/operations/processes/concepts and other objects that may appear in this application are given names. It is understandable that these specific names are not It constitutes a limitation on related objects. The assigned name can be changed according to factors such as the scene, context or usage habits. The understanding of the technical meaning of the technical terms in this application should mainly be based on the function embodied/performed in the technical solution And technical effects to determine.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may also be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If this function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), and random access.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims (35)

1. A method for transmitting side link control information, which is characterized in that it comprises:

   Receiving first side uplink control information SCI, where the first SCI includes a first field;

   Determine whether the first SCI satisfies the first condition;

   When the first SCI satisfies the first condition, the first field is used to indicate the configuration information of the second SCI, where the second SCI is used to schedule unicast data transmission or multicast data transmission; or

   When the first SCI does not meet the first condition, the first field is used to indicate the configuration information of broadcast data transmission;

   Wherein, the first condition includes at least one of the following conditions:

   The first SCI uses the wireless network temporary identification RNTI to scramble, the first SCI uses the first wireless network temporary identification RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the The format identification of the first SCI is the first identification or the second identification.
2. The method of claim 1, wherein:

   When the first SCI is scrambled by the first RNTI, the first RNTI is used to indicate that the first SCI is used for unicast data transmission; or

   When the first SCI uses the second RNTI to scramble, the second RNTI is used to indicate that the first SCI is used for multicast data transmission.
3. The method according to claim 1 or 2, characterized in that:

   When the first SCI is scrambled by the first RNTI, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

   When the first SCI scrambles by using the second RNTI, the first field is used to indicate configuration information of the second SCI used for scheduling multicast data transmission.
4. The method according to any one of claims 1 to 3, wherein when the parameter of the first field is greater than or equal to the first threshold, the parameter of the first field is equal to that of the second SCI. There is a correspondence between the configuration information.
5. The method according to any one of claims 1 to 4, characterized in that:

   When the format identifier of the first SCI is the first identifier, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

   When the format identifier of the first SCI is the second identifier, the first field is used to indicate configuration information of the second SCI used for scheduling multicast data transmission.
6. The method according to claim 1, wherein the failure of the first SCI to satisfy the first condition comprises:

   The first SCI is not scrambled by RNTI, the first SCI is not scrambled by the first RNTI or the second RNTI, the parameter of the first field is less than the first threshold, the first The format identifier of the SCI is not at least one of the first identifier or the second identifier.
7. The method according to any one of claims 1 to 5, wherein the configuration information of the second SCI comprises:

   At least one of a format corresponding to the second SCI, an aggregation level of the second SCI, a load corresponding to the second SCI, or location information of the second SCI.
8. The method according to any one of claims 1 to 7, wherein the first field comprises:

   Modulation and coding MCS indicator field, hybrid automatic repeat request HARQ process number indicator field, new data indicator field, redundancy version indicator field or multi-antenna related indicator field at least one or a combination of multiple.
9. A method for transmitting side link control information, which is characterized in that it comprises:

   Generating first side uplink control information SCI, where the first SCI includes a first field;

   Sending the first SCI;

   Wherein, when the first SCI satisfies the first condition, the first field is used to indicate configuration information of the second SCI, and the second SCI is used to schedule unicast data transmission or multicast data transmission; or

   When the first SCI does not meet the first condition, the first field is used to indicate the configuration information of the broadcast data transmission;

   The first condition includes at least one of the following conditions:

   The first SCI uses the wireless network temporary identification RNTI to scramble, the first SCI uses the first RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the first SCI The format identifier is the first identifier or the second identifier.
10. The method of claim 9, wherein:

    When the first SCI is scrambled by using the first RNTI, the first RNTI is used to indicate that the first SCI is used for unicast data transmission; or

    When the first SCI scrambles by using the first RNTI, the second RNTI is used to indicate that the first SCI is used for multicast data transmission.
11. The method of claim 10, wherein:

    When the first SCI is scrambled by the first RNTI, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

    When the first SCI scrambles by using the second RNTI, the first field is used to indicate configuration information of the second SCI used for scheduling multicast data transmission.
12. The method according to any one of claims 9 to 11, wherein when the parameter of the first field is greater than or equal to the first threshold, the parameter of the first field is equal to that of the second SCI. There is a correspondence between the configuration information.
13. The method according to any one of claims 9 to 12, characterized in that:

    When the format identifier of the first SCI is the first identifier, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

    When the format identifier of the first SCI is the second identifier, the first field is used to indicate configuration information of the second SCI used for scheduling multicast data transmission.
14. The method according to claim 9, wherein the failure of the first SCI to satisfy the first condition comprises:

    The first SCI is not scrambled by RNTI, the first SCI is not scrambled by the first RNTI or the second RNTI, the parameter of the first field is less than the first threshold, the first The format identifier of the SCI is not at least one of the first identifier or the second identifier.
15. The method according to any one of claims 9 to 13, wherein the configuration information of the second SCI comprises:

    At least one of a format corresponding to the second SCI, an aggregation level of the second SCI, a load corresponding to the second SCI, or location information of the second SCI.
16. The method according to any one of claims 9 to 15, wherein the first field comprises:

    Modulation and coding MCS indicator field, hybrid automatic repeat request HARQ process number indicator field, new data indicator field, redundancy version indicator field or multi-antenna related indicator field at least one or a combination of multiple.
17. A communication device, characterized in that it comprises:

    A transceiver unit, configured to receive first side link control information SCI, where the first SCI includes a first field;

    A processing unit, configured to determine whether the first SCI satisfies a first condition;

    When the first SCI satisfies the first condition, the first field is used to indicate the configuration information of the second SCI, where the second SCI is used to schedule unicast data transmission or multicast data transmission; or

    When the first SCI does not meet the first condition, the first field is used to indicate the configuration information of broadcast data transmission;

    Wherein, the first condition includes at least one of the following conditions:

    The first SCI uses the wireless network temporary identification RNTI to scramble, the first SCI uses the first wireless network temporary identification RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the The format identification of the first SCI is the first identification or the second identification.
18. The device of claim 17, wherein:

    When the first SCI is scrambled by the first RNTI, the first RNTI is used to indicate that the first SCI is used for unicast data transmission; or

    When the first SCI uses the second RNTI to scramble, the second RNTI is used to indicate that the first SCI is used for multicast data transmission.
19. The device according to claim 17 or 18, wherein:

    When the first SCI is scrambled by the first RNTI, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

    When the first SCI scrambles by using the second RNTI, the first field is used to indicate configuration information of the second SCI used for scheduling multicast data transmission.
20. The apparatus according to any one of claims 17 to 19, wherein when the parameter of the first field is greater than or equal to the first threshold, the parameter of the first field is equal to that of the second SCI. There is a correspondence between the configuration information.
21. The device according to any one of claims 17 to 20, characterized in that:

    When the format identifier of the first SCI is the first identifier, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

    When the format identifier of the first SCI is the second identifier, the first field is used to indicate configuration information of the second SCI used for scheduling multicast data transmission.
22. The device according to claim 17, wherein the first SCI not satisfying the first condition comprises:

    The first SCI is not scrambled by RNTI, the first SCI is not scrambled by the first RNTI or the second RNTI, the parameter of the first field is less than the first threshold, the first The format identifier of the SCI is not at least one of the first identifier or the second identifier.
23. The device according to any one of claims 17 to 22, wherein the configuration information of the second SCI comprises:

    At least one of a format corresponding to the second SCI, an aggregation level of the second SCI, a load corresponding to the second SCI, or location information of the second SCI.
24. The device according to any one of claims 17 to 23, wherein the first field comprises:

    Modulation and coding MCS indicator field, hybrid automatic repeat request HARQ process number indicator field, new data indicator field, redundancy version indicator field or multi-antenna related indicator field at least one or a combination of multiple.
25. A communication device, characterized in that it comprises:

    A processing unit, configured to generate first side uplink control information SCI, where the first SCI includes a first field;

    A transceiver unit, configured to send the first SCI;

    Wherein, when the first SCI satisfies the first condition, the first field is used to indicate configuration information of the second SCI, and the second SCI is used to schedule unicast data transmission or multicast data transmission; or

    When the first SCI does not meet the first condition, the first field is used to indicate the configuration information of the broadcast data transmission;

    The first condition includes at least one of the following conditions:

    The first SCI uses the wireless network temporary identification RNTI to scramble, the first SCI uses the first RNTI or the second RNTI to scramble, the parameter of the first field is greater than or equal to the first threshold, the first SCI The format identifier is the first identifier or the second identifier.
26. The device of claim 25, wherein:

    When the first SCI is scrambled by the first RNTI, the first RNTI is used to indicate that the first SCI is used for unicast data transmission; or

    When the first SCI scrambles by using the first RNTI, the second RNTI is used to indicate that the first SCI is used for multicast data transmission.
27. The device of claim 26, wherein:

    When the first SCI is scrambled by the first RNTI, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

    When the first SCI scrambles by using the second RNTI, the first field is used to indicate configuration information of the second SCI used for scheduling multicast data transmission.
28. The apparatus according to any one of claims 25 to 27, wherein when the parameter of the first field is greater than or equal to the first threshold, the parameter of the first field is equal to that of the second SCI. There is a correspondence between the configuration information.
29. The device according to any one of claims 25 to 28, characterized in that:

    When the format identifier of the first SCI is the first identifier, the first field is used to indicate the configuration information of the second SCI used to schedule unicast data transmission; or

    When the format identifier of the first SCI is the second identifier, the first field is used to indicate configuration information of the second SCI used for scheduling multicast data transmission.
30. The apparatus according to claim 25, wherein the failure of the first SCI to satisfy a first condition comprises:

    The first SCI is not scrambled by RNTI, the first SCI is not scrambled by the first RNTI or the second RNTI, the parameter of the first field is less than the first threshold, the first The format identifier of the SCI is not at least one of the first identifier or the second identifier.
31. The device according to any one of claims 25 to 30, wherein the configuration information of the second SCI comprises:

    At least one of a format corresponding to the second SCI, an aggregation level of the second SCI, a load corresponding to the second SCI, or location information of the second SCI.
32. The device according to any one of claims 25 to 31, wherein the first field comprises:

    Modulation and coding MCS indicator field, hybrid automatic repeat request HARQ process number indicator field, new data indicator field, redundancy version indicator field or multi-antenna related indicator field at least one or a combination of multiple.
33. A communication device, characterized in that the device includes at least one processor, and the at least one processor is coupled with at least one memory:

    The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the apparatus executes the method according to any one of claims 1 to 8, or any one of 9 to 16 The method described in the item.
34. A computer-readable storage medium, characterized in that a computer program or instruction is stored in the computer-readable storage medium, and when the computer reads and executes the computer program or instruction, the computer is caused to execute as claimed in claims 1 to 8. The method of any one of, or the method of any one of 9-16.
35. A chip, characterized by comprising: a processor, configured to call and run computer programs or instructions from a memory, so that a communication device installed with the chip executes the method according to any one of claims 1 to 8 , Or the method described in any one of 9 to 16.

Images