WO2021051348A1 - Data transmission method, and related device - Google Patents

Abstract

Disclosed in embodiments of the present application is a data transmission method, which is applied to a scenario in which a terminal device uses a BWP to receive a multicast service from a network device or in which the terminal device sends a multicast service to another terminal device, for example, multicast service transmission between a terminal device and a network device in mobile communications, multicast service transmission between terminal devices in an Internet of Vehicles scenario, and multicast service transmission between low-power devices in an Internet of Things scenario. The method in the embodiments of the present application comprises: a terminal device receives first configuration information and first indication information sent by a network device, the first configuration information being used to configure N first BWPs which support multicast service transmission, and the first indication information being used to determine a first activated BWP; when the first activated BWP is at least one first BWP among the N first BWPs, the terminal device uses the first activated BWP to receive a multicast service from the network device, or the terminal device uses the first activated BWP to send a multicast service to another terminal device.

Description

Data transmission method and related equipment Technical field

The embodiments of the present application relate to the field of communications, and in particular, to a data transmission method and related equipment.

Background technique

In the data transmission process, the terminal equipment can use the multicast bearer type or the unicast bearer type to transmit the multicast service according to different service requirements. Among them, when the multicast bearer type is used, the network device can send multicast services to multiple terminal devices in the service area, and the terminal devices in the service area can receive the service data sent by the network device without registering; while using unicast In the bearer type, the network device only sends the multicast service to a specific terminal device, for example, a terminal device that has been registered with the network device or has registration information stored in the network device.

In the new radio (NR) system, in order to allow terminal devices of different capabilities to work in the NR system, the concept of bandwidth part (BWP) is introduced. The BWP on a carrier refers to the frequency domain resources occupied by continuous resource blocks in this carrier. The frequency domain resources can be allocated by the network device to the terminal device according to the actual capabilities of the terminal device. However, how terminal devices receive multicast services on BWP is a hot topic of current research.

Summary of the invention

The embodiment of the present application provides a data transmission method, which is used to support a terminal device to use a BWP to receive a multicast service from a network device or send a multicast service to other terminal devices.

In the first aspect, an embodiment of the present application provides a data transmission method, in which a part of the bandwidth of the terminal device can be configured by the network device. After the terminal device receives the first configuration information sent by the network device, the network device configures the terminal device with N first BWPs that support multicast service transmission. At this time, the aforementioned N first BWPs are configured but not activated. When the terminal device receives the first indication information sent by the network device for determining the first activated BWP, the first indication in the terminal device The BWP indicated by the information is in the active state. When the aforementioned terminal device has a requirement to transmit multicast services, if the first activated BWP is at least one of the N first BWPs, the BWP indicated by the first indication information (ie, the first activated BWP) ) Is a BWP supporting multicast service transmission. Therefore, the terminal device may use the first activated BWP to receive the multicast service from the network device, or the terminal device may use the first activated BWP to send the multicast service to other terminal devices.

It should be understood that the aforementioned N is an integer greater than or equal to 1.

In the embodiment of the present application, the terminal device may receive the first configuration information sent by the network device for configuring the first BWP supporting the transmission of the multicast service. When the terminal device receives the first BWP configured by the first activated BWP determined by the first indication information sent by the network device as the first configuration information, the terminal device can use the first activated BWP to transmit the multicast service. Since the terminal device can use the first activated BWP to transmit multicast services, and there is no need to separately configure a larger bandwidth for the terminal device to transmit multicast services, it is beneficial to save the power consumption of the terminal device, and thus can improve the user experience .

According to the first aspect, in the first implementation manner of the first aspect of the embodiments of the present application, the first indication information includes the identifier of the first activated BWP, and the identifier of the first activated BWP is one of the N first BWPs. The identification of at least one first BWP.

In this embodiment, it is proposed to carry the identifier of the first activated BWP in the first indication information to clarify the available BWP indicated by the network device to the terminal device. When the identifier of the first activated BWP is among the aforementioned N first BWPs When the at least one first BWP is identified, the first activated BWP is a BWP that supports multicast service transmission, so the terminal device can use the BWP that supports multicast service transmission to perform multicast service transmission.

According to the first aspect or the first implementation manner of the first aspect, in a second implementation manner of the first aspect of the embodiments of the present application, the method further includes: the terminal device sends a first notification to the network device, and the first Notification is used to notify multicast service transmission requirements.

In this embodiment, the terminal device may send a first notification to the network device to notify the network device of the terminal device’s service transmission requirements, so the network device may instruct the terminal device according to the terminal device’s service transmission requirements The BWP that can meet the service transmission requirements of the terminal device is used as the activated BWP.

According to the second implementation manner of the first aspect, in the third implementation manner of the first aspect of the embodiments of the present application, the first notification includes the identifier of the multicast service or at least one identifier of the first BWP.

In this embodiment, it is proposed that the first notification may include the identifier of the multicast service or the identifier of at least one first BWP, so that the network device can determine the first notification according to the identifier of the multicast service or the identifier of at least one first BWP. Activate BWP. In addition, since the network device determines that the reference factor for the first activated BWP comes from the terminal device, the first activated BWP determined by the network device according to the reference factor provided by the terminal device can have a greater probability of satisfying the terminal device’s Business transmission requirements.

According to the second implementation manner of the first aspect or the third implementation manner of the first aspect, in the fourth implementation manner of the first aspect of the embodiments of the present application, the first notification further includes the priority of the multicast service, The priority of the multicast service is used to indicate the priority between the multicast service of the terminal device and the unicast service of the terminal device, or the priority of the multicast service is used to indicate different multicast services of the terminal device. Priority between broadcast services.

In this embodiment, it is proposed that the first notification also includes the priority of the multicast service. Therefore, the network device can determine one or more first BWPs as the first activated BWPs based on the priority of the multicast service. Therefore, the probability that the first activated BWP determined by the network device meets the service transmission demand of the terminal device can be improved.

According to the first aspect, in a fifth implementation manner of the first aspect of the embodiments of the present application, the method further includes: when the first activated BWP is not at least one of the N first BWPs, the terminal device A second activated BWP is determined among the N first BWPs, and the second activated BWP is at least one first BWP among the N first BWPs; the terminal device uses the second activated BWP to receive the multicast from the network device Service, or, the terminal device uses the second activated BWP to send the multicast service to the other terminal device.

In this embodiment, it is proposed that when the first activated BWP determined by the network device is not at least one of the aforementioned N first BWPs, that is, the first activated BWP determined by the network device cannot meet the service transmission requirements of the terminal device At this time, the terminal device may determine the second activated BWP from the N first BWPs. Since the terminal device can learn the service transmission requirement of the terminal device, the second activated BWP determined by the terminal device directly according to the service transmission requirement of the terminal device can meet the service requirement of the terminal device. In addition, the terminal device does not need to send notifications or instructions to the network device to request the network device to indicate the BWP that can meet the multicast service transmission requirements of the terminal device, so the signaling between the terminal device and the network device can be saved. Overhead, slow down the network delay.

According to the fifth implementation manner of the first aspect, in the sixth implementation manner of the first aspect of the embodiments of the present application, the method further includes: the terminal device sends a second notification to the network device, and the second notification is used to indicate The terminal device determines to use the second activated BWP to receive the multicast service from the network device, or the terminal device uses the second activated BWP to send the multicast service to other terminal devices.

In this embodiment, because the terminal device determines the second activated BWP itself and uses the second activated BWP for multicast service transmission, the network device does not know that the terminal device has determined the second activated BWP. Therefore, the terminal device needs to send a second notification to the network device to notify the network device that the terminal device has determined the second activated BWP to transmit the multicast service.

According to the sixth implementation manner of the first aspect, in the seventh implementation manner of the first aspect of the embodiments of the present application, the second notification includes the identifier of the second activated BWP, and the identifier of the second activated BWP is the N number The identification of at least one first BWP in the first BWP.

In this embodiment, it is proposed that the second notification may include the identifier of the second activated BWP, and when the network device receives the identifier of the second activated BWP, the network device can learn where the second activated BWP is determined by the terminal device A first BWP or several first BWPs.

According to the seventh implementation manner of the first aspect, in the eighth implementation manner of the first aspect of the embodiments of the present application, the second notification further includes the identifier of the first activated BWP, and the identifier of the first activated BWP is used to indicate The terminal device stops using the first activated BWP.

In this embodiment, it is proposed that in addition to the identification of the aforementioned second activated BWP, the second notification also includes the identification of the first activated BWP, and the identification of the first activated BWP is used to instruct the terminal device to stop using This first activates the BWP. Therefore, the network device can not only learn which first BWP or several first BWPs the second activated BWP determined by the terminal device is, but also can learn that the terminal device has stopped using the first activated BWP.

According to the first aspect and the first implementation manner of the first aspect to the eighth implementation manner of the first aspect, in the ninth implementation manner of the first aspect of the embodiments of the present application, the method further includes: when the terminal device uses When the activated BWP receives the multicast service from the network device, or when the terminal device uses the activated BWP to send the multicast service to the other terminal device, the terminal device starts or restarts a timer, and the timer is used for Indicate the available duration of the activated BWP, the activated BWP includes the first activated BWP or the second activated BWP; when the timer expires, the terminal device switches from the activated BWP to the initial BWP or default BWP.

In this embodiment, it is proposed to use a timer as the termination condition. When the terminal device uses the activated BWP for multicast service transmission, the timer starts to count. When the timer expires, the terminal device will stop the multicast service transmission. Therefore, the use of a timer can make the terminal device transmit the multicast service flexible and controllable time.

According to the first aspect and the first implementation manner of the first aspect to the eighth implementation manner of the first aspect, in the tenth implementation manner of the first aspect of the embodiments of the present application, the method further includes: the terminal device The network device sends second instruction information, where the second instruction information is used to instruct the terminal device to stop receiving the multicast service sent by the network device.

In this embodiment, the terminal device can directly indicate to the network device that the terminal device no longer needs to receive the multicast service sent by the network device. Therefore, the terminal device can control whether to perform multicast service transmission according to actual service requirements.

According to the tenth implementation manner of the first aspect, in the eleventh implementation manner of the first aspect of the embodiments of the present application, the second indication information includes the identifier of the multicast service or the identifier of the activated BWP, and the multiple The identifier of the broadcast service is used to instruct the first terminal device to stop receiving the multicast service, and the identifier of the activated BWP is used to instruct the first terminal device to stop using the activated BWP to receive the multicast service.

According to the first aspect and the first implementation manner of the first aspect to the eleventh implementation manner of the first aspect, in the twelfth implementation manner of the first aspect of the embodiments of the present application, the method further includes: the terminal device Receiving second configuration information sent by the network device, where the second configuration information is used to configure a first time window of the multicast service, and the first time window is used to indicate a time range in which the multicast service is available.

In this embodiment, it is proposed that the network device can configure a first time window for the terminal device to control the time when the terminal device transmits the multicast service. Therefore, the time for the terminal device to transmit the multicast service can be made flexible and controllable, and the energy consumption of the terminal device can be saved.

According to the first aspect and the first implementation manner of the first aspect to the eleventh implementation manner of the first aspect, in the thirteenth implementation manner of the first aspect of the embodiments of the present application, the method further includes: the terminal device Receive third configuration information sent by the network device, where the third configuration information is used to configure a second time window of the first activated BWP, and the second time window is used to indicate a time range in which the first activated BWP is available.

In this implementation manner, it is proposed that the network device may configure a second time window for the terminal device to control the transmission time of each first BWP in the first activated BWP of the terminal device to transmit the multicast service. Therefore, the time for the terminal device to transmit the multicast service can be made flexible and controllable, and the energy consumption of the terminal device can be saved.

According to the thirteenth implementation manner of the first aspect, in the fourteenth implementation manner of the first aspect of the embodiments of the present application, the first configuration information includes the third configuration information.

According to the first aspect and the first implementation manner of the first aspect to the fourteenth implementation manner of the first aspect, in the fifteenth implementation manner of the first aspect of the embodiments of the present application, among the N first BWPs Each first BWP is a BWP that supports only multicast service transmission or a BWP that supports multicast and unicast service transmission.

In the second aspect, the embodiments of the present application provide a data transmission method, in which the network device sends first configuration information to the terminal device to configure N first BWPs that support multicast service transmission. The network device sends first indication information to the terminal device, where the first indication information is used to determine the first activated BWP. When the first activated BWP is at least one of the N first BWPs, the network device sends a multicast service to the terminal device.

It should be understood that the aforementioned N is an integer greater than or equal to 1.

In the embodiment of the present application, the network device may send first configuration information for configuring the first BWP supporting multicast service transmission to the terminal device. Therefore, when the first active BWP indicated by the first indication information sent by the network device is When the first BWP is configured by the foregoing first configuration information, the terminal device can use the first activated BWP to transmit the multicast service. Since the terminal device can use the first activated BWP to transmit multicast services, and there is no need to separately configure a larger bandwidth for the terminal device to transmit multicast services, it is beneficial to save the power consumption of the terminal device, and thus can improve the user experience .

According to the second aspect, in the first implementation manner of the second aspect of the embodiments of the present application, the first indication information includes the identifier of the first activated BWP, and the identifier of the first activated BWP is one of the N first BWPs. The identification of at least one first BWP.

In this embodiment, it is proposed to carry the identifier of the first activated BWP in the first indication information to clarify the available BWP indicated by the network device to the terminal device. When the identifier of the first activated BWP is among the aforementioned N first BWPs When the at least one first BWP is identified, the first activated BWP is a BWP that supports multicast service transmission, so the terminal device can use the BWP that supports multicast service transmission to perform multicast service transmission.

According to the second aspect or the first implementation manner of the second aspect, in the second implementation manner of the second aspect of the embodiments of the present application, the method further includes: the network device receives the first notification sent by the terminal device, and the first notification A notification is used to notify the multicast service transmission demand.

In this embodiment, the terminal device may send a first notification to the network device to notify the network device of the terminal device’s service transmission requirements, so the network device may instruct the terminal device according to the terminal device’s service transmission requirements The BWP that can meet the service transmission requirements of the terminal device is used as the activated BWP.

According to the second implementation manner of the second aspect, in the third implementation manner of the second aspect of the embodiments of the present application, the first notification includes the identifier of the multicast service or at least one identifier of the first BWP.

In this embodiment, it is proposed that the first notification may include the identifier of the multicast service or the identifier of at least one first BWP, so that the network device can determine the first notification according to the identifier of the multicast service or the identifier of at least one first BWP. Activate BWP. In addition, since the network device determines that the reference factor for the first activated BWP comes from the terminal device, the first activated BWP determined by the network device according to the reference factor provided by the terminal device can have a greater probability of satisfying the terminal device’s Business transmission requirements.

According to the second implementation manner of the second aspect or the second implementation manner of the second aspect, in the fourth implementation manner of the second aspect of the embodiments of the present application, the first notification further includes the priority of the multicast service, The priority of the multicast service is used to indicate the priority between the multicast service of the terminal device and the unicast service of the terminal device, or the priority of the multicast service is used to indicate different multicast services of the terminal device. Priority between broadcast services.

In this embodiment, it is proposed that the first notification also includes the priority of the multicast service. Therefore, the network device can determine one or more first BWPs as the first activated BWPs based on the priority of the multicast service. Therefore, the probability that the first activated BWP determined by the network device meets the service transmission demand of the terminal device can be improved.

According to the second aspect, the first implementation manner of the second aspect to the fourth implementation manner of the second aspect, in the fifth implementation manner of the second aspect of the embodiments of the present application, the method further includes: the network device according to the The first notification determines a third activated BWP from the N first BWPs, and the third activated BWP is at least one first BWP among the N first BWPs. The network device sends a first response in response to the first notification to the terminal device, where the first response includes identification information of the third activated BWP.

In this embodiment, since the first notification can reflect the multicast service transmission requirements of the terminal device, the network device determines the third activated BWP according to the first notification, and instructs the terminal device to use the third activated BWP to transmit the multicast service. Broadcast business. Therefore, the third activated BWP determined by the network device can meet the requirement of the terminal device to transmit the multicast service.

According to the second aspect, in a sixth implementation manner of the second aspect of the embodiments of the present application, the method further includes: when the activated BWP is not at least one first BWP among the N first BWPs, the network device receives the A second notification sent by the terminal device, where the second notification is used to instruct the terminal device to determine to use the second activated BWP to receive the multicast service from the network device, or the terminal device uses the second activated BWP to send to other terminal devices Send the multicast service; the network device sends the multicast service to the terminal device.

In this embodiment, it is proposed that when the first activated BWP determined by the network device is not at least one of the aforementioned N first BWPs, that is, the first activated BWP determined by the network device cannot meet the service transmission requirements of the terminal device At this time, the terminal device may determine the second activated BWP from the N first BWPs. At this time, the terminal device needs to notify the network device through the second notification that the terminal device has determined the second activated BWP. In addition, the terminal device does not need to request the network device to indicate to the terminal device a BWP that can meet the terminal device’s multicast service transmission requirements. Therefore, the signaling overhead between the terminal device and the network device can be saved, and network time can be slowed down. Extension.

According to the sixth implementation manner of the second aspect, in the seventh implementation manner of the second aspect of the embodiments of the present application, the second notification includes the identifier of the second activated BWP, and the identifier of the second activated BWP is the N number The identification of at least one first BWP in the first BWP.

In this embodiment, it is proposed that the second notification may include the identifier of the second activated BWP, and when the network device receives the identifier of the second activated BWP, the network device can learn where the second activated BWP is determined by the terminal device A first BWP or several first BWPs.

According to the seventh implementation manner of the second aspect, in the eighth implementation manner of the second aspect of the embodiments of the present application, the second notification further includes the identifier of the first activated BWP, and the identifier of the first activated BWP is used to indicate The terminal device stops using the first activated BWP.

In this embodiment, it is proposed that in addition to the identification of the aforementioned second activated BWP, the second notification also includes the identification of the first activated BWP, and the identification of the first activated BWP is used to instruct the terminal device to stop using This first activates the BWP. Therefore, the network device can not only learn which first BWP or several first BWPs the second activated BWP determined by the terminal device is, but also can learn that the terminal device has stopped using the first activated BWP.

According to the second aspect and the first implementation manner of the second aspect to the eighth implementation manner of the second aspect, in the ninth implementation manner of the second aspect of the embodiments of the present application, the method further includes: the network device receives the The second indication information sent by the terminal device, where the second indication information is used to instruct the terminal device to stop receiving the multicast service sent by the network device.

In this embodiment, the terminal device can directly indicate to the network device that the terminal device no longer needs to receive the multicast service sent by the network device. Therefore, the terminal device can control whether to perform multicast service transmission according to actual service requirements. When the network device receives the second indication information sent by the terminal device, the network device will no longer send multicast services to the terminal device.

According to the ninth implementation manner of the second aspect, in the tenth implementation manner of the second aspect of the embodiments of the present application, the second indication information includes the identifier of the multicast service or the identifier of the activated BWP, and the multicast The service identifier is used to instruct the terminal device to stop receiving the multicast service, and the activated BWP identifier is used to instruct the terminal device to stop using the activated BWP to receive the multicast service.

According to the second aspect and the first implementation manner of the second aspect to the tenth implementation manner of the second aspect, in the eleventh implementation manner of the second aspect of the embodiments of the present application, the method further includes: the network device The terminal device sends second configuration information, where the second configuration information is used to configure a first time window of the multicast service, and the first time window is used to indicate a time range in which the multicast service is available.

In this embodiment, it is proposed that the network device can configure a first time window for the terminal device to control the time when the terminal device transmits the multicast service. Therefore, the time for the terminal device to transmit the multicast service can be made flexible and controllable, and the energy consumption of the terminal device can be saved.

According to the second aspect and the first implementation manner of the second aspect to the tenth implementation manner of the second aspect, in the twelfth implementation manner of the second aspect of the embodiments of the present application, the method further includes: the network device The terminal device sends third configuration information, where the third configuration information is used to configure a second time window of the first activated BWP, and the second time window is used to indicate a time range in which the first activated BWP is available.

In this implementation manner, it is proposed that the network device may configure a second time window for the terminal device to control the transmission time of each first BWP in the first activated BWP of the terminal device to transmit the multicast service. Therefore, the time for the terminal device to transmit the multicast service can be made flexible and controllable, and the energy consumption of the terminal device can be saved.

According to the twelfth implementation manner of the second aspect, in the thirteenth implementation manner of the second aspect of the embodiments of the present application, the first configuration information includes the third configuration information.

According to the second aspect and the first implementation manner of the second aspect to the thirteenth implementation manner of the second aspect, in the fourteenth implementation manner of the second aspect of the embodiments of the present application, among the N first BWPs Each first BWP is a BWP that supports only multicast service transmission or a BWP that supports multicast and unicast service transmission.

In the third aspect, an embodiment of the present application provides a communication device. The communication device may be a terminal device or a chip in the terminal device. The communication device may include a processing unit and a communication unit. When the communication device is a terminal device, the processing unit may be a processor, and the communication unit may be a transceiver; the terminal device may also include a storage unit, and the storage unit may be a memory. The storage unit is used to store instructions, and the processing unit executes the instructions stored in the storage unit, so that the terminal device executes the first aspect or the method in any one of the implementation manners of the first aspect. When the communication device is a chip in a terminal device, the processing unit may be a processor, and the communication unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage unit to make the The terminal device executes the method in the first aspect or any one of the implementations of the first aspect, and the storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip, or may be a storage unit located in the terminal device. A storage unit outside the chip (for example, read-only memory, random access memory, etc.).

In a fourth aspect, an embodiment of the present application provides a communication device. The communication device may be a network device or a chip in the network device. The communication device may include a processing unit and a communication unit. When the communication device is a network device, the processing unit may be a processor, and the communication unit may be a transceiver; the network device may further include a storage unit, and the storage unit may be a memory. The storage unit is used to store instructions, and the processing unit executes the instructions stored in the storage unit, so that the network device executes the second aspect or the method in any one of the implementation manners of the second aspect. When the communication device is a chip in a network device, the processing unit may be a processor, and the communication unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage unit to enable the The network device executes the method in the second aspect or any one of the implementations of the second aspect, and the storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip, or it may be located in the network device. A storage unit outside the chip (for example, read-only memory, random access memory, etc.).

In the fifth aspect, the embodiments of the present application provide a communication system, including; a terminal device and a network device; the terminal device executes the methods described in the first aspect and various implementation manners of the first aspect; the network device executes The second aspect and the methods introduced in the various implementations of the second aspect.

In a sixth aspect, the embodiments of the present application provide a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the first aspect and the various implementation manners of the first aspect or the second aspect and The methods described in the various implementations of the second aspect.

In the seventh aspect, the embodiments of the present application provide a computer program product containing instructions that, when run on a computer, enable the computer to execute various implementations such as the first aspect and the first aspect or the second aspect and the second aspect. Aspects of the various implementations of the methods introduced.

It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

In the embodiment of the present application, the terminal device may receive the first configuration information sent by the network device for configuring the first BWP supporting the transmission of the multicast service. When the terminal device receives the first BWP configured by the first activated BWP determined by the first indication information sent by the network device as the first configuration information, the terminal device can use the first activated BWP to transmit the multicast service. Since the terminal device can use the first activated BWP to transmit multicast services, and there is no need to separately configure a larger bandwidth for the terminal device to transmit multicast services, it is beneficial to save the power consumption of the terminal device, and thus can improve the user experience .

Description of the drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application.

FIG. 1 is a system architecture diagram of a data transmission method in an embodiment of this application;

2A is a flowchart of a data transmission method in an embodiment of this application;

2B is a schematic diagram of an embodiment of the first time window in an embodiment of the application;

2C is a schematic diagram of another embodiment of the first time window in the embodiment of this application;

2D is a schematic diagram of another embodiment of the first time window in the embodiment of this application;

2E is a schematic diagram of another embodiment of the first time window in the embodiment of this application;

FIG. 3 is another flowchart of the data transmission method in an embodiment of the application;

FIG. 4 is another flowchart of the data transmission method in an embodiment of this application;

FIG. 5 is a schematic diagram of an embodiment of a communication device in an embodiment of the application;

FIG. 6 is a schematic diagram of another embodiment of a communication device in an embodiment of this application;

FIG. 7 is a schematic diagram of another embodiment of a communication device in an embodiment of this application;

FIG. 8 is a schematic diagram of another embodiment of a communication device in an embodiment of this application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, without having to use To describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in a sequence other than the content illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

The embodiment of the present application provides a data transmission method for supporting a terminal device to use a BWP to receive a multicast service from a network device or send a multicast service to other terminal devices.

For ease of understanding, the following first introduces the system architecture and application scenarios of the data transmission method proposed in the embodiments of the present application:

The solution proposed in the embodiment of the present application is mainly based on a new wireless technology, also known as the fifth generation mobile communication (the 5th generation, 5G) technology, and may also be based on a subsequent evolution access standard, which is not specifically limited here. In this embodiment and subsequent embodiments, a 5G-based communication system is taken as an example for introduction. As shown in FIG. 1, the communication system includes: a terminal device 101 and a network device 102. The terminal device 101 can receive the configuration of the network device 102 and use the frequency domain resources configured by the network device 102 to transmit service data. Specifically, the terminal device 101 may use the frequency domain resource to receive the service data sent by the network device 101.

In one implementation, the data transmission method can be applied to a 5G-based vehicle to everything (V2X) system, that is, to provide vehicle information through sensors or vehicle-mounted terminal equipment mounted on the vehicle to realize the vehicle and other The system of communication between devices. In this car networking system, vehicles and vehicles (V2V), vehicles and infrastructure (V2I), vehicles and networks (V2N), and vehicles and pedestrians (V2P) ) Can use frequency domain resources to transmit service data. Therefore, when the terminal device 101 is a car networking terminal device, the terminal device 101 can use the frequency domain resource to send service data to other terminal devices.

In another implementation, the data transmission method can be applied to a 5G-based Internet of Things (IoT) system, for example, it can be based on the narrowband Internet of Things (NB-IoT) standard or enhanced The machine type communication (enhanced machine type communication, eMTC) standard is not specifically limited here. In this system, NB-IoT terminals or eMTC terminals are low-power terminal devices, which can be used for data connection in a low-power wide-area network (LPWAN), and realize the aforementioned low-power terminal devices Data transmission between or between low-power terminal equipment and network equipment. Therefore, when the terminal device 101 is an NB-IoT terminal or an eMTC terminal, the terminal device 101 can use frequency domain resources to receive service data sent by the network device, and can also use the frequency domain resources to send other terminal devices (for example, Other NB-IoT terminals or eMTC terminals) send service data.

It should be understood that the data transmission method in the embodiment of the present application is not only applicable to the foregoing scenarios, but also applicable to other scenarios where multicast services are transmitted, and the specifics are not limited here.

In this embodiment of the present application, the aforementioned terminal device 101 includes a device that provides voice and/or data connectivity to users. For example, it may include a handheld device with a wireless connection function or a processing device connected to a wireless modem. The terminal device 101 may communicate with a core network via a radio access network (RAN), and exchange voice and/or data with the RAN. The terminal device 101 may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), Remote station (remote station), access point (access point, AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), or User equipment (user device), etc. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, and personal digital assistants, PDA) and other equipment.

In addition, in an Internet of Vehicles scenario, the terminal device 101 may be an Internet of Vehicles terminal device, also called a V2X terminal device. Specifically, in the V2V communication process, the terminal device 101 may be a vehicle-mounted terminal; in the V2I communication process, the terminal device 101 may be a vehicle-mounted terminal or an infrastructure with mobile communication functions; in other V2X scenarios, the terminal The device 101 may also be another V2X device, which is not specifically limited here. The terminal device 101 may also be a wearable device, such as glasses, gloves, watches, clothing and shoes, or other portable devices that can be directly worn on the body or integrated into the user's clothes or accessories.

In addition, in an IoT scenario, the terminal device 101 may be a restricted device, for example, a low-power terminal device, or a terminal device with limited storage capacity, or a terminal device with limited computing capacity, which is not specifically limited here.

It should be understood that the terminal device 101 in the embodiment of the present application may be a device in any of the foregoing scenarios or a chip in the device, and the details are not limited here. Whether as a device or as a chip, the terminal device 101 can be manufactured, sold, or used as an independent product. In this embodiment and subsequent embodiments, only the terminal device 101 is taken as an example for introduction.

In addition, the network device 102 that performs data transmission with the aforementioned terminal device 101 may be a radio access network (RAN) device, such as a base station or an access point; it may also refer to the access network on the air interface. A device that communicates with wireless terminal devices through one or more cells. The network device 102 can be used to convert received air frames and Internet protocol (IP) packets to each other, and serve as a router between the terminal device and the rest of the access network, where the rest of the access network can include IP network. The network device 102 can also coordinate the attribute management of the air interface. For example, the next generation node B (gNB) in the 5G system or the NR system may also include the centralized unit (CU) and the distributed unit (CU) in the Cloud RAN system. distributed unit, DU), the embodiment of this application is not limited.

It should be understood that the network device 102 in the embodiment of the present application may be any one of the above-mentioned devices or a chip in the device, which is not specifically limited here. Whether as a device or as a chip, the network device 102 can be manufactured, sold, or used as an independent product.

For ease of understanding, the following describes the flow of the data transmission method based on the system architecture shown in Figure 1 above, as shown in Figure 2A, including the following steps:

201. A network device sends first configuration information to a terminal device.

In this embodiment, the network device may configure a BWP for the terminal device, where the BWP refers to the frequency domain resources occupied by continuous physical resource blocks on one carrier. Specifically, the network device may send configuration information for configuring the BWP to the first terminal device. The network device can configure different BWPs for the terminal device.

Specifically, the network device may send the first configuration information to the terminal device. In an implementation manner, the network device may carry the first configuration information in a broadcast system message, and the terminal device may obtain the first configuration information sent by the network device from the system message. In another implementation manner, the network device may carry the first configuration information in dedicated signaling of the terminal device. For example, the network device may use a dedicated radio resource control (RRC) signal. Command to send the first configuration information to the terminal device, so the terminal device can obtain the first configuration information from the RRC signaling. Optionally, the network device may carry the first configuration information in downlink control information (downlink control information, DCI), which is not specifically limited here.

In addition, the first configuration information in this embodiment refers to information used to configure N first BWPs that support multicast service transmission, where N is an integer greater than or equal to 1. Specifically, in the NR system, the aforementioned N can be 1, 2, 3, or 4; in the subsequent evolution standard, the aforementioned N can be 1, 2, 3, or 4, and the aforementioned N can also be 5, 6, 7, or 8. Or 16, etc., the specifics are not limited here. It should be understood that due to different application scenarios of the terminal device, the number of first BWPs configured by the network device for the terminal device may be different, which is not specifically limited here.

In addition, the first BWP is a BWP supporting multicast service transmission. Specifically, the first BWP may be a BWP that only supports multicast service transmission, and the first BWP may also be a BWP that supports multicast and unicast service transmission, which is not specifically limited here. In this embodiment and subsequent embodiments, only the first BWP is a BWP supporting multicast service transmission as an example for introduction. In addition, the aforementioned support for multicast service transmission means that the terminal device can receive multicast service data sent by a network device, or the terminal device can send multicast service data to other terminal devices. It should also be understood that the foregoing multicast service is also referred to as a multicast service (multicast).

It should also be noted that the aforementioned first configuration information carries the identity of the first BWP configured by the first configuration information, and the identity of the first BWP is used to identify the identity of the first BWP. Generally, the identifier of the first BWP corresponds to the first BWP. If the first configuration information is used to configure N first BWPs, the first configuration information includes identification information of each first BWP in the aforementioned N first BWPs. In some optional implementation manners, the first configuration information may also include other information, such as subcarrier spacing, BWP size, whether to allow hybrid automatic repeat request feedback (HARQ feedback), etc., specifically There is no limitation here.

It should also be noted that, in the NR system, BWP includes: initial BWP (initial bandwidth part, Initial BWP) and configuration BWP. Among them, the initial BWP: used for receiving or sending information before a terminal device in an idle state or an inactive state connects to a network device, for example, system information related to random access (RA) . Configuration BWP: refers to the BWP exclusive to the terminal device, which refers to the BWP that the network device configures to the terminal device to perform certain specific services. The configuration BWP includes the default BWP (default bandwidth part, Default BWP), which is one or more BWPs in the configuration BWP specified by the network device. When the terminal device does not need to transmit services, the terminal device will switch to the default BWP. In this embodiment, the first BWP may be one of the configured BWPs, which is not specifically limited here.

In this embodiment, after the network device performs step 201, the network device may directly perform step 203; the network device may also perform step 203 after the terminal device performs step 202. Specifically, it will be described in detail below.

202. The terminal device sends a first notification to the network device.

In this embodiment, step 202 is an optional step.

After the terminal device receives the first configuration information sent by the network device, the terminal device can determine which BWPs the network device has configured for the terminal device, that is, the terminal device can determine the configured and to-be-activated terminal device of the terminal device BWP. At this time, if the terminal device has a multicast service transmission demand, the terminal device can send a first notification to the network device to notify the network device that the terminal device has a multicast service transmission demand, so that the network device is the The terminal device indicates a BWP that supports multicast service transmission.

Optionally, the first notification includes an identifier of at least one multicast service. When the first notification includes the identifier of the multicast service, it indicates that the terminal device has a requirement for transmitting the multicast service corresponding to the identifier of the multicast service.

Optionally, the first notification includes the identification of at least one first BWP. Since different multicast services may need to be transmitted on different first BWPs, the terminal device may send one or more identities of the first BWP to the network device.

Optionally, the first notification may include the identifier of the foregoing multicast service and the identifier of the foregoing at least one first BWP.

Optionally, in addition to the identifier of the foregoing multicast service and the identifier of the foregoing at least one first BWP, the first notification may also include the priority of the multicast service. The priority of the multicast service may be used to indicate the priority between the multicast service of the terminal device and the unicast service of the terminal device. For example, the priority of the multicast service may indicate that the multicast service of the terminal device has priority over the unicast service of the terminal device, or indicate that the unicast service of the terminal device has priority over the multicast service of the terminal device. Specifically, when the terminal device has both a demand for transmitting unicast services and a demand for transmitting multicast services, if the first notification indicates that the multicast service of the terminal device has priority over the unicast service of the terminal device, Then the network device will give priority to the terminal device instructing the first BWP of the multicast service to be transmitted.

In another optional implementation manner, the priority of the multicast service may also be used to indicate the priority between different multicast services of the terminal device. For example, the priority of the multicast service may indicate that the multicast service A of the terminal device has priority over the multicast service B of the terminal device. At this time, if the terminal device has the requirement of transmitting the multicast service A and the transmission rate The first notification indicates that the multicast service A of the terminal device is preferred to the multicast service B of the terminal device, and the network device will give priority to the terminal device instructing the transmission of the multicast service A The first BWP. It should also be understood that when the terminal device has at least three multicast service requirements, the priority of each type of multicast service may respectively indicate the priority order of the at least three multicast services. For example, the priority of the multicast service in the first notification may indicate that: the multicast service A has priority over the multicast service B, and the multicast service B has priority over the multicast service C. If the terminal device has requirements for transmitting multicast service A, transmitting multicast service B, and transmitting multicast service C, the network device will give priority to the terminal device to instruct the first BWP of multicast service A to be transmitted.

In another optional implementation manner, the priority of the multicast service may also be used to indicate the priority between different multicast services and different unicast services of the terminal device. For example, when the terminal device has a need to transmit multiple multicast services and a need to transmit multiple unicast services, the priority of the multicast service in the first notification may indicate that the multicast service A has priority over the unicast service B, Moreover, the unicast service B has priority over the multicast service C, and the multicast service C has priority over the unicast service D. If the terminal device has a requirement to transmit the multicast service A and the unicast service B, the network device will give priority to the terminal device to instruct the BWP of the multicast service A to be transmitted.

In practical applications, the terminal device may carry any of the foregoing multicast service priorities in the foregoing first notification, which is not specifically limited here.

203. The network device determines the first activated BWP.

In this embodiment, if the aforementioned terminal device does not perform step 202, after the network device performs step 201, the network device may directly perform step 203. At this time, the network device may not be aware of the service transmission requirements of the terminal device. Therefore, the network device can determine the first activated BWP according to the information about the terminal device known by the network device.

In an optional implementation manner, the network device will determine the first activated BWP for the terminal device according to the load condition of the terminal device. Specifically, the network device may determine that the first activated BWP is a first BWP or multiple first BWPs according to the number of terminal devices that are transmitting multicast services in the current cell, where the current cell is the cell where the terminal device is located. . For example, if the number of terminal devices that are transmitting multicast services in the current cell is large, the network device may indicate only the terminal device that one or two first BWPs are the first activated BWPs. If the number of terminal devices that are transmitting the multicast service in the current cell is small, the network device may indicate only the terminal device that the multiple first BWPs are the first activated BWPs. The details are not limited here. In addition, the network device may also determine the first activated BWP according to the amount of multicast services transmitted in the current cell. For example, if a large number of multicast services are being transmitted in the current cell, the network device may indicate a first BWP with a smaller bandwidth to the terminal device, or the network device may directly indicate to the terminal device a single-only BWP. The BWP of the broadcast service is used to avoid adding to the network load or increasing the network delay due to the transmission of the multicast service by the terminal device.

In another optional implementation manner, the network device randomly selects one or more BWPs from the multiple BWPs configured for the terminal device as the first activated BWP.

In actual applications, the network device may adopt any of the foregoing implementation manners to determine the first activated BWP, which is not specifically limited here. However, in the foregoing two implementation manners, since the network device does not know the service transmission requirements of the terminal device, the first activated BWP determined by the network device may not meet the service requirements of the terminal device.

It should be noted that if the aforementioned terminal device performs step 202, the network device can determine the first activated BWP according to the first notification in the aforementioned step 202. details as follows:

When the first notification in the foregoing step 202 only indicates that the terminal device has a multicast service transmission requirement, but does not indicate which multicast service needs to be transmitted or which BWP is used to transmit the multicast service, the network device can directly transmit the multicast service from the terminal device. The first activated BWP is determined from the BWP of the service, that is, the first activated BWP is determined from the aforementioned N first BWPs. Further, the network device may determine from the foregoing N first BWPs that one or more first BWPs with a smaller load are the first activated BWPs; the network device may also randomly determine one or more of the foregoing N first BWPs. The multiple first BWPs are the first activated BWPs, which are not specifically limited here.

Optionally, when the first notification in the foregoing step 202 includes the identifier of the multicast service, the network device may determine, according to the identifier of the multicast service, the second multicast service corresponding to the identifier that can be used to transmit the multicast service. One BWP. Since the identifier of the multicast service may be the identifier of at least one multicast service, the first activated BWP determined by the network device may be one first BWP or multiple first BWPs. The identifier of the first activated BWP is the identifier of at least one first BWP among the aforementioned N first BWPs. The details are not limited here.

Optionally, when the first notification in step 202 includes the identification of at least one first BWP, the network device may determine one or more first BWPs from the at least one first BWP corresponding to the identification of the at least one first BWP. One BWP. Specifically, when the first notification includes only one first BWP identifier, the network device may only determine that the first BWP corresponding to the first BWP identifier is the first activated BWP; when the first notification includes multiple When identifying the first BWP, the network device may determine that one or more or all of the multiple first BWPs corresponding to the multiple first BWP identities are the first activated BWPs. For example, when the first notification includes 4 identifiers, and the 4 identifiers are the identifier of the first BWP1, the identifier of the first BWP2, the identifier of the first BWP3, and the identifier of the first BWP4, the aforementioned 4 identifiers correspond to The first BWP1, the first BWP2, the first BWP3, and the first BWP4. At this time, the network device may determine a first BWP as the first activated BWP from the four first BWPs, for example, determine that the first BWP1 is the first activated BWP; the network device may also determine from the four first BWPs It is determined that multiple first BWPs are the first activated BWPs, for example, the first BWP1 and the first BWP2 are determined to be the first activated BWPs; the network device may also determine from the four first BWPs that all the first BWPs are the first Activating the BWP, for example, determining that the first BWP1, the first BWP2, the first BWP3, and the first BWP4 are the first activated BWPs. The details are not limited here.

Optionally, when the first notification in the foregoing step 202 also includes the priority of the multicast service, the network device will configure the terminal device with a higher priority BWP according to the priority of the multicast service. For example, when the terminal device has both a requirement for transmitting unicast services and a requirement for transmitting multicast services, if the first notification indicates that the multicast service of the terminal device has priority over the unicast service of the terminal device, then The network device will preferentially instruct the terminal device to transmit the first BWP of the multicast service. Specifically, reference may be made to the related description in step 202, and details are not repeated here.

Optionally, when the first notification in the foregoing step 202 includes the foregoing multicast service identifier and the foregoing at least one first BWP identifier, the network device will comprehensively consider the multicast service requirements of the terminal device and the terminal device. The first activated BWP is determined by the load condition of each first BWP. When the first notification in the foregoing step 202 also includes the priority of the multicast service, the network device compares the priority of the multicast service with the multicast service demand of the foregoing terminal device and the first BWP of each of the foregoing terminal devices. The load conditions are combined to determine the identity of the first activated BWP. The details are not repeated here.

204. The network device sends the first indication information to the terminal device.

In this embodiment, after the network device determines that the BWP is first activated, the network device will send the first indication information to the terminal device. The first indication information is used to instruct the terminal device to use the BWP indicated by the first indication information to receive the service data sent by the network device, that is, to indicate the first activated BWP determined by the network device. The first indication information includes the identifier of the first activated BWP, and the identifier of the first activated BWP is the identifier of one or more first BWPs determined by the aforementioned network device. For example, when the first notification includes the identification of BWP1, the identification of BWP2, and the identification of BWP3, if the network device determines that BWP2 and BWP3 are the first activated BWPs based on the load of these three BWPs, the network device will be in the first The indication carries the identity of the BWP2 and the identity of the BWP3, and the identity of the first activated BWP is the identity of the BWP2 and the identity of the BWP3.

205. The terminal device judges whether the first activated BWP is at least one first BWP among the N first BWPs.

In this embodiment, after the terminal device receives the first indication information sent by the network device, the terminal device will determine whether the first active BWP indicated by the first indication information is at least one of the aforementioned N first BWPs. The first BWP. Specifically, the terminal device may determine whether the identifier of the first activated BWP is the identifier of one or more first BWPs in the terminal device.

In this embodiment, when the terminal device does not perform the aforementioned step 202, because the network device does not know the service requirements of the terminal device, therefore, the first activated BWP determined by the network device may be one of the N first BWPs. The at least one first BWP may be a BWP for transmitting multicast services; or it may not be at least one of the N first BWPs, that is, it may not be a BWP capable of transmitting multicast services. When the identifier of the first activated BWP is the identifier of at least one of the N first BWPs in the terminal device, that is, when the first activated BWP is at least one of the N first BWPs At this time, the terminal device executes step 206. When the identifier of the first activated BWP is not the identifier of at least one of the N first BWPs in the terminal device, that is, when the first activated BWP is not the at least one of the N first BWPs When the terminal device has a multicast service transmission requirement, please refer to the related introduction in the embodiment corresponding to FIG. 3 and FIG. 4 below, and the details are not repeated here.

In this embodiment, when the terminal device executes the aforementioned step 202, since the network device can determine from the aforementioned N first BWPs according to the first notification that one or more first BWPs are the first activated BWPs, therefore, the The first activation determined by the network device is at least one of the N first BWPs, that is, the BWP for transmitting the multicast service. At this time, the terminal device executes step 206.

206. The terminal device uses the first activated BWP to receive a multicast service from the network device, or the terminal device uses the first activated BWP to send a multicast service to other terminal devices.

In this embodiment, when the terminal device is a user equipment UE, a wireless terminal device, or a mobile terminal device, the terminal device can use the first activated BWP to receive a multicast service from the network device. Optionally, in the scenario of device-to-device communication (device to device, D2D), the aforementioned user equipment UE, wireless terminal device, or mobile terminal device is a D2D device. In this case, the terminal device (that is, the D2D device) can use the The first activated BWP sends a multicast service to other terminal devices (that is, other D2D devices). When the terminal device is a car networking terminal device (for example, a vehicle-mounted terminal or a drive test terminal), the terminal device uses the first activated BWP to send multicast services to other car networking terminal devices, or the terminal device uses the first Activate BWP to receive multicast services from other connected car terminal devices. When the terminal device is an Internet of Things terminal device (for example, an NB-IoT terminal or an eMTC terminal), the terminal device uses the first activated BWP to send multicast services to other Internet of Things terminal devices, or the terminal device uses the second 1. Activate the BWP to receive multicast services from other IoT terminal devices.

In this embodiment, the terminal device may receive the first configuration information sent by the network device for configuring the first BWP supporting the transmission of the multicast service. When the terminal device receives the first BWP configured by the first activated BWP determined by the first indication information sent by the network device as the first configuration information, the terminal device can use the first activated BWP to transmit the multicast service. Since the terminal device can use the first activated BWP to transmit multicast services, and there is no need to separately configure a larger bandwidth for the terminal device to transmit multicast services, it is beneficial to save the power consumption of the terminal device, and thus can improve the user experience . In addition, if the terminal device sends a first notification to the network device before receiving the first indication information sent by the network device to notify the network device of the terminal device’s multicast service transmission requirements, then the network device can follow the first indication. A notification indicates that the terminal device indicates the first activated BWP that meets the multicast service requirements of the terminal device, and causes the terminal device to use the first activated BWP to receive the multicast service from the network device, or the terminal device uses the first activated BWP. One activates the BWP to send multicast services to other terminal devices. Therefore, it is beneficial to increase the probability that the first activated BWP determined by the network device meets the service transmission demand of the terminal device, simplify the signaling process between the terminal device and the network device, and thereby reduce the network delay.

207. After the termination condition is met, the terminal device stops transmitting the multicast service.

In this embodiment, step 207 is an optional step.

In this embodiment, when the terminal device uses the first activated BWP to transmit the multicast service, if the terminal device meets the termination condition, the terminal device will stop transmitting the multicast service. Wherein, the termination condition may be that the timer of the terminal device expires, or the terminal device receives an instruction to stop receiving the multicast service sent by the network device.

Specifically, in an embodiment, when the terminal device uses the aforementioned first activated BWP to receive a multicast service from the network device, or when the terminal device uses the aforementioned first activated BWP to send a multicast service to the other terminal device During the service, the terminal device will start or restart a timer, where the timer is used to indicate the available duration of the first activated BWP. When the timer expires, the terminal device switches from the first activated BWP to the initial BWP or the default BWP. Generally, when the network device does not configure the default BWP for the terminal device, the terminal device will switch from the first activated BWP to the initial BWP, that is, the BWP used to receive information when the terminal device is in an idle state. When the network device configures the default BWP for the terminal device, the terminal device will switch from the first activated BWP to the default BWP.

In addition, in another implementation manner, if the terminal device no longer needs to receive the multicast service sent by the network device, the terminal device may send second indication information to the network device, and the second indication information is used to indicate the The terminal device requests to stop receiving the multicast service sent by the network device. After the network device receives the second instruction information, the network device may no longer send the multicast service indicated by the second instruction information to the terminal device, and the network device sends to the terminal device to stop receiving the multicast service Instructions. Therefore, the terminal device will no longer receive the multicast service after receiving the instruction to stop receiving the multicast service.

Optionally, the second indication information includes the identifier of the multicast service or the identifier of the activated BWP, and the identifier of the multicast service is used to instruct the terminal device to stop receiving one of the identifiers corresponding to the multicast service or A variety of multicast services. The identifier of the activated BWP is used to instruct the terminal device to stop using the activated BWP to receive the multicast service, where the activated BWP includes the first activated BWP. The activated BWP may be a first BWP, or may be multiple first BWPs, which is not specifically limited here. Optionally, the activated BWP may also include a BWP for transmitting unicast services, which is not specifically limited here.

In addition, there is also an implementation manner in which the network device may also directly send an instruction to stop receiving the multicast service to the terminal device, so that the terminal device stops receiving the multicast service.

In this embodiment, the terminal device can not only use the first activated BWP to transmit the multicast service according to the configuration of the network device, but the terminal device can also terminate the transmission of the multicast service when the termination condition is met. Therefore, the terminal device is flexible and controllable when transmitting multicast services, saving energy consumption of the terminal device.

In this embodiment, the network device can control the time for the terminal device to transmit the multicast service by configuring a time window for the terminal device. Specifically, the network device may perform step 208 or step 209.

208. The network device sends second configuration information to the terminal device.

In this embodiment, step 208 is an optional step, and there is no clear time sequence limitation between step 208 and the foregoing steps 201 to step 205, and step 208 only needs to be performed before step 206.

Wherein, the second configuration information is used to configure a first time window, and the first time window is used to indicate the time range of the BWP for transmitting the multicast service in the terminal device to transmit the multicast service, that is, the multicast service in the terminal device Available time range.

Specifically, in an optional implementation manner, the second configuration information includes a first starting point and the first duration. The first starting point is used to indicate the moment when the terminal device starts to receive the multicast service from the network device or the moment when the terminal device starts to send the multicast service to other terminal devices. The first duration is used to indicate the duration for the terminal device to transmit the multicast service, that is, the duration for the terminal device to receive the multicast service from the network device or the duration for the terminal device to send the multicast service to other terminal devices. For ease of understanding, take FIG. 2B as an example for introduction, where the first time window information includes the first starting point a1 and the first duration d1, so it can be determined that the first time window is [a1, (a1+d1)] . It should be understood that "[" and "]" represent interval symbols of the time period indicated by the first time window. Among them, "[" is a left closed interval symbol, indicating that the time period indicated by the first time window includes the left end point a1; "]" is a right closed interval symbol, indicating that the time period indicated by the first time window includes the right end point (a1 +d1). It should also be noted that the aforementioned "(" and ")" are ordinary operators and do not represent open interval symbols. In addition, the "[", "]", "(" and ")" involved in the following text are similar to this, and the details are not repeated here.

Optionally, the second configuration information may include multiple first starting points and multiple first durations. Taking FIG. 2C as an example, the first time window information includes a first starting point a1, a first time length d1, a first starting point a2, a first time length d2, a first starting point a3, and a first time length d3. The first time windows are [a1, (a1+d1)], [a2, (a2+d2)] and [a3, (a3+d3)].

In another optional implementation manner, the second configuration information includes a first starting point and a first ending point, where the first starting point is used to indicate the moment when the terminal device starts to receive the multicast service from the network device or the The moment when a terminal device starts to send multicast services to other terminal devices. The first termination point is used to indicate the moment when the terminal device stops receiving the multicast service from the network device or the moment when the terminal device stops sending the multicast service to other terminal devices. For ease of understanding, take FIG. 2D as an example for introduction, where the first time window information includes a first starting point a1 and a first ending point b1. Specifically, the first time window is a period of time from a1 to b1, namely [a1, b1].

Optionally, the second configuration information may include multiple first starting points and multiple first ending points. Taking FIG. 2E as an example, the first time window information includes a first starting point a1, a first ending point b1, a first starting point a2, a first ending point b2, a first starting point a3, and a first ending point b3, so, It can be determined that the first time window is [a1, b1], [a2, b2] and [a3, b3], respectively.

In this embodiment, the terminal device will use the aforementioned first activated BWP to transmit the multicast service within the first time window. Because, the network device can control the terminal device to transmit the multicast service within the preset time range by being the first time window for the terminal device. Therefore, the process of transmitting the multicast service by the terminal device can be made flexible and controllable.

209. The network device sends third configuration information to the terminal device.

In this embodiment, step 209 is an optional step, and there is no clear time sequence limitation between step 209 and the aforementioned steps 201 to 205, and step 209 only needs to be performed before step 206.

Specifically, the network device may send third configuration information to the terminal device, where the third configuration information is used to configure a second time window, and the second time window is used to indicate each of the aforementioned N first BWPs. Available time range. Among them, the available time range of each first BWP may be different. The representation manner of the second time window is similar to the representation manner of the first time window introduced in the foregoing FIG. 2B, FIG. 2C, FIG. 2D, and FIG. 2E, and details are not repeated here.

Optionally, when the third configuration information is located in the aforementioned first configuration information, the second time window is used to indicate the available time range of the aforementioned first activated BWP. At this time, step 209 is performed simultaneously with the aforementioned step 201.

In this embodiment, the terminal device can not only use the first activated BWP to transmit the multicast service according to the configuration of the network device, the terminal device can also initiate the use of the first activated BWP to transmit the multicast service according to the second time window indicated by the network device Or stop using the first activated BWP to transmit the multicast service. Therefore, the process of the terminal device using the first activated BWP to transmit the multicast service can be made flexible and controllable.

The above describes the situation when the first activated BWP is one or more BWPs that can meet the requirements of the terminal device for transmitting the multicast service. In the foregoing case, the terminal device may use the first activated BWP to transmit the multicast service. However, in practical applications, there are also cases where the first activated BWP cannot meet the requirements of the terminal device for transmitting the multicast service. The data transmission method in this case will be introduced in detail below, as shown in Figure 3, including the following steps:

301. A network device sends first configuration information to a terminal device.

The first configuration information includes the identifier of the first BWP configured by the first configuration information, and the identifier of the first BWP is used to identify the identity of the first BWP. Generally, the identifier of the first BWP corresponds to the first BWP. If the first configuration information is used to configure N first BWPs, the first configuration information includes identification information of each first BWP in the aforementioned N first BWPs.

Specifically, it is similar to step 201 in the foregoing, and details are not repeated here.

302. The network device determines the first activated BWP.

In this embodiment, the network device may determine the first activated BWP for the terminal device according to the load condition of the terminal device, or it may randomly select one or more BWPs as the first among multiple BWPs configured for the terminal device. Activating the BWP is not limited here. Specifically, please refer to the related introduction in the foregoing step 203, and the details are not repeated here.

303. The network device sends first indication information to the terminal device.

In this embodiment, when the network device designates a certain BWP in the terminal device to receive the service data sent by the network device, the network device may send first indication information to the terminal device to instruct the terminal device to use the first The BWP indicated by the indication information receives the service data sent by the network device, that is, the first indication information is used to indicate the first activated BWP, and the first activated BWP is the network device instructing the terminal device to receive the service data sent by the network device BWP. The first activated BWP may be a certain BWP or several BWPs in the terminal device, which is not specifically limited here.

Generally, the first indication information includes the identifier of the first activated BWP. Since the first activated BWP may be a certain BWP or several BWPs in the terminal device, the identification of the first activated BWP may be the identification of a certain BWP in the terminal device or the identification of the terminal device. The identification of certain BWPs is not limited here.

Specifically, it is similar to the foregoing step 204, and details are not repeated here.

In this embodiment, after the terminal device receives the first indication information sent by the network device, the terminal device will perform step 304.

304. The terminal device judges whether the first activated BWP is at least one first BWP among the N first BWPs.

In this embodiment, after the terminal device receives the first indication information sent by the network device, the terminal device will determine whether the first active BWP indicated by the first indication information is at least one of the aforementioned N first BWPs. The first BWP. Specifically, the first indication information includes the identifier of each first BWP in the aforementioned N first BWPs, and the terminal device can determine whether the identifier of the first activated BWP is one or more first BWPs in the terminal device. The logo of BWP.

When the identifier of the first activated BWP is the identifier of at least one of the N first BWPs in the terminal device, that is, when the first activated BWP is at least one of the N first BWPs At this time, the terminal device executes step 308a. When the identifier of the first activated BWP is not the identifier of at least one of the N first BWPs in the terminal device, that is, when the first activated BWP is not the at least one of the N first BWPs When the terminal device has a multicast service transmission requirement, the terminal device executes step 305.

305. The terminal device sends a first notification to the network device.

In this embodiment, when the first activated BWP is not at least one of the N first BWPs, the terminal device may use the first activated BWP to transmit service data. However, because the first activated BWP is not the first BWP, that is, the first activated BWP is not a BWP that supports multicast service transmission, therefore, at this time, the terminal device cannot use the first activated BWP to transmit the multicast service. Therefore, in order to meet the requirement of the terminal device to transmit multicast services, the terminal device will send a first notification to the network device. The first notification is used to notify the network device that the terminal device has a multicast service transmission requirement, so that the network device instructs the terminal device to support a BWP for multicast service transmission.

Specifically, the information carried in the first notification is similar to the content carried in the first notification in the foregoing step 202. For details, please refer to the relevant description in the foregoing step 202, which will not be repeated here.

306. The network device determines a third activated BWP from the N first BWPs according to the first notification.

In this embodiment, the network device may determine the third activated BWP according to the first notification in the foregoing step 305.

Specifically, the manner in which the network device determines the first activated BWP according to the first notification in step 202 is similar to that in the foregoing step 203. For details, please refer to the related description in the foregoing step 203, which will not be repeated here.

In this embodiment, after the network device determines the third activated BWP, the network device will perform step 307.

307. The network device sends a first response in response to the first notification to the terminal device.

In this embodiment, the first response is used to indicate the third activated BWP determined by the network device according to the first notification. The first response includes the identifier of the third activated BWP, and the identifier of the third activated BWP is the identifier of at least one of the aforementioned N first BWPs. The third activated BWP is a BWP that can meet the service transmission requirements of the terminal device.

In this embodiment, since the third activated BWP is determined by the network device according to the first notification, the third activated BWP is at least one first BWP among the N first BWPs. At this time, the terminal device will execute step 308b.

308a. The terminal device uses the first activated BWP to receive a multicast service from the network device, or the terminal device uses the first activated BWP to send a multicast service to other terminal devices.

In this embodiment, step 308a is similar to the aforementioned step 206, and the details will not be repeated here.

In this embodiment, the terminal device may receive the first configuration information sent by the network device for configuring the first BWP supporting the transmission of the multicast service. When the terminal device receives the first BWP configured by the first activated BWP determined by the first indication information sent by the network device as the first configuration information, the terminal device can use the first activated BWP to transmit the multicast service. Since the terminal device can use the first activated BWP to transmit multicast services, and there is no need to separately configure a larger bandwidth for the terminal device to transmit multicast services, it is beneficial to save the power consumption of the terminal device, and thus can improve the user experience .

308b. The terminal device uses the third activated BWP to receive a multicast service from the network device, or the terminal device uses the third activated BWP to send a multicast service to other terminal devices.

In this embodiment, the terminal device uses the third activated BWP to perform the process of step 308b, which is similar to the foregoing process of the terminal device uses the first activated BWP to perform step 206, and the details will not be repeated here.

In this embodiment, when the first active BWP determined by the terminal device receiving the first indication information sent by the network device is not the first BWP configured by the first configuration information, the terminal device is receiving the first indication sent by the network device After information, a first notification is sent to the network device to notify the network device of the terminal device’s multicast service transmission requirements, and the network device can indicate to the terminal device to satisfy the terminal device’s multicast service requirements according to the first notification. The third activated BWP is used to enable the terminal device to use the third activated BWP to receive multicast services from the network device, or the terminal device uses the third activated BWP to send multicast services to other terminal devices. Therefore, it is beneficial for the terminal device to notify the network device through the first notification when the activated BWP does not meet the multicast service transmission requirements of the terminal device, so that the network device indicates to the terminal device that the terminal device can meet the requirements of the terminal device. The demand for multicast service transmission. Therefore, therefore, it is beneficial to save the power consumption of the terminal device, thereby improving the user experience.

Optionally, the network device may configure a time window for the terminal device to control the time for the terminal device to transmit the multicast service. The terminal device may perform step 309 or step 310.

309. The terminal device receives second configuration information sent by the network device.

In this embodiment, step 309 is an optional step, and step 309 may have no clear chronological order between the aforementioned steps 301 to 307, and step 309 only needs to be performed before step 308a or 308b.

Specifically, it is similar to the foregoing step 208, and details are not repeated here.

310. The terminal device receives third configuration information sent by the network device.

In this embodiment, step 310 is an optional step, and step 310 may be defined in the aforementioned steps 301 to 307 without a clear time sequence, and step 310 only needs to be performed before step 308a or 308b.

Specifically, it is similar to the foregoing step 209, and details are not repeated here.

In this embodiment, the terminal device can not only use the first activated BWP to transmit the multicast service according to the configuration of the network device, the terminal device can also start or stop using the first activated BWP to transmit the multicast service according to the time window indicated by the network device. The first activated BWP is used to transmit the multicast service. Therefore, the terminal device is flexible and controllable when transmitting multicast services, saving energy consumption of the terminal device.

In practical applications, when the first activated BWP cannot meet the requirements of the terminal device for transmitting multicast services, in addition to the foregoing embodiment corresponding to FIG. 3 for processing, there is also an embodiment of a data transmission method . The data transmission method in this case will be introduced in detail below, as shown in Figure 4, including the following steps:

401. The network device sends first configuration information to the terminal device.

402. The network device determines the first activated BWP.

403. The network device sends first indication information to the terminal device.

In this embodiment, step 401 to step 403 are similar to the aforementioned step 301 and step 303, and the details are not repeated here.

404. The terminal device determines whether the first activated BWP is at least one first BWP among the N first BWPs.

In this embodiment, after the terminal device receives the first indication information sent by the network device, the terminal device will determine whether the first active BWP indicated by the first indication information is at least one of the aforementioned N first BWPs. The first BWP. Specifically, the first indication information includes the identifier of each first BWP in the aforementioned N first BWPs, and the terminal device can determine whether the identifier of the first activated BWP is one or more first BWPs in the terminal device. The logo of BWP.

When the identifier of the first activated BWP is the identifier of at least one of the N first BWPs in the terminal device, that is, when the first activated BWP is at least one of the N first BWPs At this time, the terminal device executes step 407a. When the identifier of the first activated BWP is not the identifier of at least one of the N first BWPs in the terminal device, that is, when the first activated BWP is not the at least one of the N first BWPs When the terminal device has a multicast service transmission requirement, the terminal device executes step 405.

405. The terminal device determines a second activated BWP from the N first BWPs according to the multicast service transmission requirement.

Wherein, the second activated BWP is at least one first BWP among the N first BWPs.

In this embodiment, since the terminal device can learn its own multicast service transmission requirement of the terminal device, the terminal device can determine the second activated BWP from the N first BWPs according to the multicast service transmission requirement.

Specifically, the terminal device may determine the second activated BWP from the foregoing N first BWPs according to the multicast service to be transmitted.

Optionally, the terminal device may determine the second activated BWP according to the priority of the multicast service. Specifically, the terminal device may determine one or more first BWPs with higher priority as the second activated BWP according to the priority of the multicast service. For example, when the priority of the first BWP1 in the terminal device is higher than the priority of the first BWP2, and the multicast service of the terminal device has priority over the unicast service of the terminal device, the terminal device may determine the first BWP2. A BWP1 is the second activated BWP.

406. The terminal device sends a second notification to the network device.

The second notification is used to instruct the terminal device to determine to use the second activated BWP to receive the multicast service from the network device, or the terminal device to use the second activated BWP to send the multicast service to other terminal devices.

Optionally, the second notification includes an identifier of the second activated BWP, and the identifier of the second activated BWP is an identifier of at least one first BWP among the N first BWPs.

Optionally, the second notification includes the identifier of the second activated BWP, the second activated BWP also includes the identifier of the first activated BWP, and the identifier of the first activated BWP is used to instruct the terminal device to stop using This first activates the BWP.

407a. The terminal device uses the first activated BWP to receive the multicast service from the network device, or the terminal device uses the first activated BWP to send the multicast service to the other terminal device.

In this embodiment, step 407a is similar to the aforementioned step 206, and the details will not be repeated here.

In this embodiment, the terminal device may receive the first configuration information sent by the network device for configuring the first BWP supporting the transmission of the multicast service. When the terminal device receives the first BWP configured by the first activated BWP determined by the first indication information sent by the network device as the first configuration information, the terminal device can use the first activated BWP to transmit the multicast service. Therefore, the terminal device can use the multicast service.

407b. The terminal device uses the second activated BWP to receive the multicast service from the network device, or the terminal device uses the second activated BWP to send the multicast service to the other terminal device.

In this embodiment, the terminal device uses the second activated BWP to perform the process of step 308b, which is similar to the foregoing process of the terminal device uses the first activated BWP to perform step 206, and the details are not repeated here.

In this embodiment, the terminal device may receive the first configuration information sent by the network device for configuring the first BWP supporting the transmission of the multicast service. When the terminal device receives the first BWP configured by the first activated BWP determined by the first indication information sent by the network device as the first configuration information, the terminal device can use the first activated BWP to transmit the multicast service. Since the terminal device can use the first activated BWP to transmit multicast services, and there is no need to separately configure a larger bandwidth for the terminal device to transmit multicast services, it is beneficial to save the power consumption of the terminal device, and thus can improve the user experience . When the terminal device receives the first indication information sent by the network device and determines that the first active BWP is not the first BWP configured by the first configuration information, the terminal device can directly determine the first BWP that meets the multicast service requirements of the terminal device. 2. Activate the BWP, and use the second activated BWP to receive the multicast service from the network device, or use the second activated BWP to send the multicast service to other terminal devices. Therefore, when the activated BWP does not meet the multicast service transmission requirement of the terminal device, the terminal device can determine by itself the second activated BWP that meets the multicast service transmission requirement of the terminal device. Therefore, the terminal device does not need to send the first notification to the network device to request the network device to indicate the BWP that can meet the multicast service transmission requirements of the terminal device. Therefore, the signaling between the terminal device and the network device can be saved. Overhead, slow down the network delay. In addition, the switching of the BWP of the terminal device can be made more flexible, which is beneficial to reducing the power of the terminal device.

Optionally, the network device may configure a time window for the terminal device to control the time for the terminal device to transmit the multicast service. The terminal device can perform step 408 or step 409.

408. The terminal device receives second configuration information sent by the network device.

In this embodiment, step 408 is an optional step, and step 408 may be defined in the aforementioned step 401 to step 406 without a clear time sequence, and step 408 only needs to be performed before step 407a or 407b.

Specifically, it is similar to the foregoing step 208, and details are not repeated here.

409. The terminal device receives the third configuration information sent by the network device.

In this embodiment, step 409 is an optional step, and step 409 may be in the aforementioned steps 401 to 406 without a clear time sequence limitation, and step 409 only needs to be performed before step 407a or 407b.

Specifically, it is similar to the foregoing step 209, and details are not repeated here.

In this embodiment, the terminal device can not only use the first activated BWP to transmit the multicast service according to the configuration of the network device, the terminal device can also start or stop using the first activated BWP to transmit the multicast service according to the time window indicated by the network device. The first activated BWP is used to transmit the multicast service. Therefore, the terminal device is flexible and controllable when transmitting multicast services, saving energy consumption of the terminal device.

The method proposed in the embodiment of the present application has been introduced above, and the specific structure of the device involved in executing the method will be introduced below.

As shown in FIG. 5, this embodiment provides a schematic structural diagram of a communication device 50. The terminal device in the method embodiment corresponding to FIG. 2A, FIG. 3, and FIG. 4 may be based on the structure of the communication device 50 shown in FIG. 5 in this embodiment.

The communication device 50 includes at least one processor 501, at least one memory 502, and at least one transceiver 503. Among them, the processor 501, the memory 502, and the transceiver 503 are connected. Optionally, the communication device 50 may further include an output device 506, an input device 505, and one or more antennas 504. The antenna 504 is connected to the transceiver 503, and the output device 506 and the input device 505 are connected to the processor 501.

The processor 501 may be a baseband processor or a central processing unit (CPU), and the baseband processor and the CPU may be integrated or separated. The processor 501 may be used to implement various functions for the communication device 50, for example, to process communication protocols and communication data, or to control the entire communication device 50, execute software programs, and process data of the software programs; Or it is used to assist in completing calculation processing tasks, such as graphics and image processing or audio processing, etc.; or the processor 501 is used to implement one or more of the above functions.

In this embodiment, the memory 502 is mainly used to store software programs and data. The memory 502 may exist independently and is connected to the processor 501. Optionally, the memory 502 may be integrated with the processor 501, for example, integrated in one or more chips. Wherein, the memory 502 can store program codes for executing the technical solutions of the embodiments of the present application, and the processor 501 controls the execution. Various types of computer program codes that are executed can also be regarded as drivers of the processor 501. It should be understood that FIG. 5 in this embodiment only shows one memory and one processor. However, in actual applications, the communication device 50 may have multiple processors or multiple memories, which are not specifically limited here. In addition, the memory 502 may also be referred to as a storage medium or a storage device. The memory 502 may be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, which is not limited in the embodiment of the present application.

In this embodiment, the transceiver 503 may be used to support the reception or transmission of radio frequency signals between the communication device 50 and the network device, and the transceiver 503 may be connected to the antenna 504. The transceiver 503 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 504 can receive radio frequency signals, and the receiver Rx of the transceiver 503 is used to receive the aforementioned radio frequency signals from the antenna 504, and convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and transfer the digital signals. The baseband signal or digital intermediate frequency signal is provided to the processor 501, so that the processor 501 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 503 is also used to receive a modulated digital baseband signal or digital intermediate frequency signal from the processor 501, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass it through a Or multiple antennas 504 transmit the radio frequency signal. Specifically, the receiver Rx can selectively perform one or multiple down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal. The sequence of the aforementioned down-mixing processing and analog-to-digital conversion processing is The order is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on modulated digital baseband signals or digital intermediate frequency signals to obtain radio frequency signals. The order of precedence is adjustable. The aforementioned digital baseband signal and digital intermediate frequency signal can be collectively referred to as a digital signal.

It should be understood that the aforementioned transceiver 503 may also be referred to as a transceiving unit, transceiver, or transceiving device. Optionally, the device used to implement the receiving function in the transceiver unit can be regarded as the receiving unit, and the device used to implement the transmitting function in the transceiver unit can be regarded as the transmitting unit. That is, the transceiver unit includes the receiving unit and the transmitting unit, and the receiving unit also It can be called a receiver, a receiver, an input port, or a receiving circuit, and the sending unit can be called a transmitter, a transmitter, an output port, or a transmitting circuit, etc.

In addition, the output device 506 communicates with the processor 501, and can display information in a variety of ways. For example, the output device 506 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector). )Wait. The input device 505 communicates with the processor 501, and can receive user input in a variety of ways. For example, the input device 505 may be a mouse, a keyboard, a touch screen device, or a sensor device.

As shown in FIG. 6, this embodiment provides a schematic structural diagram of another communication device 60. The network device in the method embodiment corresponding to the foregoing FIG. 2A, FIG. 3, and FIG. 4 may be based on the structure of the communication device 60 shown in FIG. 6 in this embodiment.

The communication device 60 includes at least one processor 601, at least one memory 602, at least one transceiver 603, at least one network interface 605, and one or more antennas 604. The processor 601, the memory 602, the transceiver 603, and the network interface 604 are connected through a connecting device, and the antenna 604 is connected to the transceiver 603. Wherein, the aforementioned connecting device may include various interfaces, transmission lines, or buses, etc., which is not limited in this embodiment.

Among them, the processor 601 is mainly used to process the communication protocol and communication data, and to control the entire network device, execute the software program, and process the data of the software program, for example, to support the communication device 60 to execute the description in the foregoing embodiment Actions. The communication device 60 may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire communication device 60, execute software programs, and process software. Program data. The processor 601 in FIG. 6 can integrate the functions of a baseband processor and a central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors and are interconnected by technologies such as a bus. Those skilled in the art can understand that the communication device 60 may include multiple baseband processors to adapt to different network standards, the communication device 60 may include multiple central processors to enhance its processing capabilities, and the various components of the communication device 60 may use various Bus connection. 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 can be built in the processor, or can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.

In addition, the aforementioned network interface 605 is used to connect the communication device 60 with other communication devices through a communication link. Specifically, the network interface 605 may include a network interface between the communication device 60 and a core network element, such as an S1 interface; the network interface 605 may also include the communication device 60 and other network devices (such as other access network devices). Or a network interface between core network elements), such as an X2 or Xn interface.

In addition, the foregoing transceiver 603, memory 602, and antenna 604 can refer to the relevant description of the transceiver 503, memory 502, and antenna 504 in the corresponding embodiment of FIG. 5 to implement similar functions, and the details are not repeated here.

As shown in FIG. 7, this embodiment provides another communication device 70. The communication device 70 includes a processing unit 701, a communication unit 702, and a storage unit 703. The communication device 70 may be a terminal device or a chip in a terminal device.

When the communication device 70 is a terminal device, the specific structure diagram of the communication device 70 can refer to the structure of the communication device 50 shown in FIG. 5. Optionally, the communication unit 702 of the communication device 70 may include the antenna and transceiver of the aforementioned communication device 50, such as the antenna 504 and the transceiver 503 in FIG. 5.

When the communication device 70 is a chip in the terminal device in the embodiment of the application, the communication unit 702 may be an input or output interface, a pin, a circuit, or the like. The storage unit 703 may be a register, a cache, a random access memory (RAM), etc. The storage unit 703 may be integrated with the processing unit 701; the storage unit 703 may be a read only memory (ROM). ) Or other types of static storage devices that can store static information and instructions, the storage unit 703 may be independent of the processing unit 701. When the communication device 70 is a terminal device or a chip in a terminal device, the processing unit 701 can complete the method executed by the terminal device in the foregoing embodiment.

In a possible design, the processing unit 701 may include instructions, which may run on a processor, so that the communication device 70 executes the method executed by the terminal device in the foregoing embodiment.

In another possible design, an instruction is stored in the storage unit 703, and the instruction can be executed on the processing unit 701, so that the communication device 70 executes the method executed by the terminal device in the foregoing embodiment. Optionally, the aforementioned storage unit 703 may also store data. Optionally, the processing unit 701 may also store instructions and/or data.

Specifically, the communication unit 702 is configured to receive the first configuration information sent by the network device.

The communication unit 702 is also configured to receive the first indication information sent by the network device.

The processing unit 701 is further configured to use the first activated BWP to receive a multicast service from the network device when the first activated BWP is at least one of the N first BWPs, or use the first activated BWP One activates the BWP to send multicast services to other terminal devices.

For the rest, reference may be made to the steps performed by the terminal device in the foregoing embodiment, which will not be repeated here.

As shown in FIG. 8, this embodiment provides another communication device 80, which may be a network device or a chip in a network device.

When the communication device 80 is a network device, the specific structure diagram of the communication device 80 can refer to the structure of the communication device 60 shown in FIG. 6 described above. Optionally, the communication unit 802 of the communication device 80 may include the antenna and transceiver of the aforementioned communication device 60, such as the antenna 604 and the transceiver 603 in FIG. 6. Optionally, the communication unit 802 may further include a network interface, for example, the network interface 605 in FIG. 6.

When the communication device 80 is a chip in a network device in the embodiment of the present application, the communication unit 802 may be an input or output interface, a pin, or a circuit. The storage unit 803 can be a register, a cache, a RAM, etc. The storage unit 803 can be integrated with the processing unit 801; the storage unit 803 can be a ROM or other types of static storage devices that can store static information and instructions, the storage unit 803 It can be independent of the processing unit 801. When the communication device 80 is a network device or a chip in a network device, the processing unit 801 can complete the method executed by the network device in the foregoing embodiment.

In a possible design, the processing unit 801 may include instructions, which may be executed on a processor, so that the communication device 80 executes the method executed by the network device in the foregoing embodiment.

In another possible design, an instruction is stored on the storage unit 803, and the instruction can be executed on the processing unit 801, so that the communication device 80 executes the method of the network device in the foregoing embodiment. Optionally, the aforementioned storage unit 803 may also store data. Optionally, the processing unit 801 may also store instructions and/or data.

Specifically, the communication unit 802 is configured to send the first configuration information to the terminal device.

The communication unit 802 is also configured to send first indication information to the terminal device.

The processing unit 801 is configured to control the communication unit 802 to send a multicast service to the terminal device when the first activated BWP is at least one of the N first BWPs.

For the rest, reference may be made to the steps performed by the network device in the foregoing embodiment, which will not be repeated here.

It should be understood that the aforementioned terminal device may have functional units (means) corresponding to the steps of the method or process of the terminal device, and the aforementioned network equipment may have functional units corresponding to the steps of the method or process of the network device. One or more of the above modules or units can be implemented by software, hardware or a combination of both. When any of the above modules or units are implemented by software, the software exists in the form of computer program instructions and is stored in the memory, and the processor can be used to execute the program instructions to implement the above method flow.

The processor in this application may include but is not limited to at least one of the following: central processing unit CPU, microprocessor, digital signal processor (digital signal processor, DSP), microcontroller (microcontroller unit, MCU), or artificial intelligence Various computing devices such as processors that run software. Each computing device may include one or more cores for executing software instructions to perform operations or processing. The processor can be a single semiconductor chip, or it can be integrated with other circuits to form a semiconductor chip. For example, it can be combined with other circuits (such as codec circuits, hardware acceleration circuits, or various bus and interface circuits) to form a system-on-chip ( system-on-a-chip, SoC), or as an application specific integrated circuit (ASIC) built-in processor integrated in the ASIC, the ASIC integrated with the processor can be packaged separately or It can also be packaged with other circuits. In addition to the core used to execute software instructions for calculation or processing, the processor may also include necessary hardware accelerators, such as field programmable gate array (FPGA) and programmable logic device (FPGA). device, PLD), or a logic circuit that implements dedicated logic operations.

The memory in the embodiment of the present application may include at least one of the following types: read-only memory ROM or other types of static storage devices that can store static information and instructions, random access memory RAM, or other types of information and instructions that can be stored The dynamic storage device may also be an electrically erasable programmable read-only memory (EEPROM). In some scenarios, the memory can also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.) , A magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

In addition to the data bus, the bus may also include a power bus, a control bus, and a status signal bus. However, for the sake of clear description, various buses are marked as buses in the figure.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

According to the method provided in the embodiment of the present application, the embodiment of the present application further provides a communication system, which includes the aforementioned one or more communication devices and one or more communication devices.

It should also be understood that the first, second, third, fourth, and various numerical numbers involved in this specification are only for easy distinction for description and are not used to limit the scope of the embodiments of the present application.

It should be understood that the term "and/or" in this text is only an association relationship describing the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, and both A and B exist. , There are three cases of B alone. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

It should be understood that in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application. The implementation process constitutes any limitation.

Those of ordinary skill in the art may realize that the various illustrative logical blocks and steps described in the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. achieve. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions 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.

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 merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. 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.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can 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. When the computer program instructions are loaded and 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 may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state hard disk).

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

The above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still compare the previous embodiments. The recorded technical solutions are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (30)

A data transmission method, characterized in that it comprises: The terminal device receives first configuration information sent by the network device, where the first configuration information is used to configure N first BWPs that support multicast service transmission, and the N is an integer greater than or equal to 1; Receiving, by the terminal device, first indication information sent by the network device, where the first indication information is used to determine a first activated BWP; When the first activated BWP is at least one of the N first BWPs, the terminal device uses the first activated BWP to receive a multicast service from the network device, or the terminal The device uses the first activated BWP to send a multicast service to other terminal devices. The method according to claim 1, wherein the first indication information includes an identifier of the first activated BWP, and the identifier of the first activated BWP is at least one of the N first BWPs. A logo of BWP. The method according to claim 1 or 2, wherein the method further comprises: The terminal device sends a first notification to the network device, where the first notification is used to notify the multicast service transmission requirement. The method according to claim 3, wherein the first notification includes an identifier of a multicast service or at least one identifier of the first BWP. The method according to claim 3 or 4, wherein the first notification further includes the priority of the multicast service, and the priority of the multicast service is used to indicate the multicast service of the terminal device The priority with the unicast service of the terminal device, or the priority of the multicast service is used to indicate the priority between different multicast services of the terminal device. The method according to claim 1, wherein the method further comprises: When the first activated BWP is not at least one of the N first BWPs, the terminal device determines a second activated BWP from the N first BWPs, and the second activated BWP is At least one first BWP among the N first BWPs; The terminal device uses the second activated BWP to receive the multicast service from the network device, or the terminal device uses the second activated BWP to send the multicast service to the other terminal device. The method according to claim 6, wherein the method further comprises: The terminal device sends a second notification to the network device, where the second notification is used to instruct the terminal device to determine to use the second activated BWP to receive the multicast service from the network device, or The terminal device uses the second activated BWP to send the multicast service to other terminal devices. The method according to claim 7, wherein the second notification includes an identifier of the second activated BWP, and the identifier of the second activated BWP is that at least one of the N first BWPs is the first The logo of BWP. The method according to claim 8, wherein the second notification further includes an identifier of the first activated BWP, and the identifier of the first activated BWP is used to instruct the terminal device to stop using the first BWP. Activate BWP. The method according to any one of claims 1 to 9, wherein the method further comprises: When the terminal device uses the activated BWP to receive a multicast service from the network device, or when the terminal device uses the activated BWP to send a multicast service to the other terminal device, the terminal The device starts or restarts a timer, where the timer is used to indicate the available duration of the activated BWP, and the activated BWP includes the first activated BWP or the second activated BWP; When the timer expires, the terminal device switches from the activated BWP to the initial BWP or the default BWP. The method according to any one of claims 1 to 9, wherein the method further comprises: The terminal device sends second instruction information to the network device, where the second instruction information is used to instruct the terminal device to stop receiving the multicast service sent by the network device. The method according to claim 11, wherein the second indication information includes an identifier of the multicast service or an identifier of the activated BWP, and the identifier of the multicast service is used to indicate the first A terminal device stops receiving the multicast service, and the identifier of the activated BWP is used to instruct the first terminal device to stop using the activated BWP to receive the multicast service. The method according to any one of claims 1 to 12, wherein the method further comprises: The terminal device receives second configuration information sent by the network device, where the second configuration information is used to configure a first time window of the multicast service, and the first time window is used to indicate the multicast service Available time range. A data transmission method, characterized in that it comprises: The network device sends first configuration information to the terminal device, where the first configuration information is used to configure N first BWPs that support multicast service transmission, and the N is an integer greater than or equal to 1; Sending, by the network device, first indication information to the terminal device, where the first indication information is used to determine the first activated BWP; When the first activated BWP is at least one of the N first BWPs, the network device sends a multicast service to the terminal device. The method according to claim 14, wherein the first indication information includes an identifier of the first activated BWP, and the identifier of the first activated BWP is at least one of the N first BWPs. A logo of BWP. The method according to claim 14 or 15, wherein the method further comprises: The network device receives a first notification sent by the terminal device, where the first notification is used to notify a multicast service transmission requirement. The method according to claim 16, wherein the first notification includes an identifier of a multicast service or at least one identifier of the first BWP. The method according to claim 16 or 17, wherein the first notification further includes the priority of the multicast service, and the priority of the multicast service is used to indicate the multicast service of the terminal device The priority with the unicast service of the terminal device, or the priority of the multicast service is used to indicate the priority between different multicast services of the terminal device. The method according to any one of claims 14 to 18, wherein the method further comprises: Determining, by the network device, a third activated BWP from the N first BWPs according to the first notification, where the third activated BWP is at least one first BWP among the N first BWPs; The network device sends a first response in response to the first notification to the terminal device, where the first response includes identification information of the third activated BWP. The method according to claim 19, wherein the method further comprises: When the activated BWP is not at least one of the N first BWPs, the network device receives a second notification sent by the terminal device, and the second notification is used to instruct the terminal device to determine Receiving the multicast service from the network device using the second activated BWP, or the terminal device uses the second activated BWP to send the multicast service to other terminal devices; The network device sends the multicast service to the terminal device. The method according to claim 20, wherein the second notification includes an identification of the second activated BWP, and the identification of the second activated BWP is that at least one of the N first BWPs is the first The logo of BWP. The method according to claim 21, wherein the second notification further includes an identifier of the first activated BWP, and the identifier of the first activated BWP is used to instruct the terminal device to stop using the first BWP. Activate BWP. The method according to any one of claims 14 to 22, wherein the method further comprises: The network device receives second instruction information sent by the terminal device, where the second instruction information is used to instruct the terminal device to stop receiving the multicast service sent by the network device. The method according to claim 23, wherein the second indication information includes an identifier of the multicast service or an identifier of the activated BWP, and the identifier of the multicast service is used to indicate to the terminal The device stops receiving the multicast service, and the identifier of the activated BWP is used to instruct the terminal device to stop using the activated BWP to receive the multicast service. The method according to any one of claims 14 to 24, wherein the method further comprises: The network device sends second configuration information to the terminal device, where the second configuration information is used to configure a first time window of the multicast service, and the first time window is used to indicate that the multicast service is available Time range. A communication device, wherein the communication device is a terminal device or a chip or a functional unit in the terminal device; The terminal equipment includes: Processor and memory; The memory is used to store programs; The processor is used to execute the program to implement the method according to any one of claims 1 to 13. A communication device, characterized in that the communication device is a network device or a chip or a functional unit in the network device; The network equipment includes: Processor and memory; The memory is used to store programs; The processor is used to execute the program to implement the method according to any one of claims 14 to 25. A communication system, characterized in that, the communication system includes: The communication device according to claim 26 and the communication device according to claim 27. A computer program product containing instructions, which is characterized in that when it runs on a computer, the computer executes the method according to any one of claims 1 to 25. A computer-readable storage medium, characterized by comprising instructions, which when run on a computer, causes the computer to execute the method according to any one of claims 1 to 25.

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