A communication method, device and system

Abstract

The embodiments of the present application provide a communication method, device and system, which relate to the field of communication technology and are used to reduce the power consumption of a terminal when transmitting data on a direct communication interface. The scheme includes: a terminal receives resource information from an access network device, and the resource information is used to characterize direct communication interface resources. The terminal transmits data through direct communication interface resources, and the terminal is in a radio resource control RRC-inactive state. When the terminal is in an RRC-inactive state, the method provided in the embodiments of the present application can still use the direct communication interface resources from the access network device to transmit data, thereby reducing the power consumption of the terminal when transmitting data on the direct communication interface, and the scheme can be applicable to direct communication scenarios.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular, to a communication method, device, and system. Background Art

[0002] Vehicle to everything (V2X) technology has been established in the long term evolution (LTE) system in Release (R) 14 and R15 of SA2 of the 3rd generation partnership project (3GPP), as well as the new radio (NR) system.

[0003] In V2X communication, terminal A can use the PC5 interface between it and terminal B to send data to terminal B on the sidelink resource.

[0004] In V2X communication, for terminal A in a radio resource control (RRC)-activated state (for example, idle state), the base station can use a network scheduled operation mode to configure sidelink resources for terminal A. For terminal A in an RRC-inactive state (for example, idle state), the sidelink resources can be determined by the terminal autonomous resource selection mode (UE autonomous resources selection mode). Among them, the network scheduling operation mode may refer to the base station configuring sidelink resources for the terminal by dynamic scheduling or semi-static scheduling. The terminal autonomous resource selection mode may refer to the terminal selecting sidelink resources in a resource pool by resource frame sensing.

[0005] However, since sensing is required when the terminal adopts the terminal autonomous resource selection mode to determine the side link resources, and frame listening is not required when the terminal uses the network scheduling operation mode, the power consumption of the terminal using the terminal autonomous resource selection mode to determine the side link resources is higher than the power consumption of the terminal using the network scheduling operation mode to determine the side link resources. Therefore, the power consumption of a terminal in an RRC-inactive state using the side link resources to send side link data is higher than the power consumption of a terminal in an RRC-activated state using the side link resources to send side link data.

[0006] Based on this, how to reduce the power consumption of a terminal when using sidelink resources to send sidelink data is a technical problem that needs to be solved urgently. Summary of the invention

[0007] Embodiments of the present application provide a communication method, device, and system for reducing power consumption of a terminal when transmitting data on a direct communication interface.

[0008] In order to achieve the above objectives, the present application provides the following technical solutions:

[0009] In the first aspect, an embodiment of the present application provides a communication method, including: a terminal receives resource information from an access network device, the resource information is used to characterize a direct communication interface resource; the terminal transmits data through the direct communication interface resource, wherein the terminal is in a radio resource control RRC-inactive state (RRC-inactive), or the terminal is in an RRC-activated state, and the terminal adopts a power saving mode. In the method, the terminal receives resource information from the access network device, and since the resource information is used to characterize the direct communication interface resource, data can be transmitted on the direct communication interface resource when the terminal is in a radio resource control RRC-inactive state, or when the terminal is in an RRC-activated state and the terminal adopts a power saving mode. In this way, for a terminal in an RRC-inactive state, the power consumption caused by the terminal adopting a terminal autonomously selecting a resource mode to obtain a direct communication interface resource in order to transmit data can be avoided. For a terminal in an RRC-activated state and in a power saving mode, the power consumption generated when transmitting data on the direct communication interface resource can still be lower than the power consumption generated by a terminal in an RRC-activated state that does not adopt a power saving mode. Therefore, the method provided in the embodiment of the present application can reduce the power consumption of the terminal when transmitting data through the direct communication interface.

[0010] The direct communication interface refers to a communication interface between two terminals that communicates without being transferred by a base station. The direct communication interface communication includes data transmission, for example, the transmission of signaling and service data. The direct communication interface can also be called a PC5 interface.

[0011] In a possible implementation manner of the first aspect, the resource information is acquired by the terminal from the access network device when the terminal is in an RRC-activated state.

[0012] In a possible implementation manner of the first aspect, the direct communication interface resource is a direct communication interface resource based on a network scheduling mode.

[0013] In a possible implementation of the first aspect, before the terminal transmits data through the direct communication interface resources, the method provided by the embodiment of the present application may also include: the terminal determines that the network side (for example, the access management network element) allows the terminal to use the direct communication interface resources based on the network scheduling mode to transmit data. For example, the terminal receives information from the network side for indicating that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit data. Among them, the direct communication interface resources based on the network scheduling mode can be direct communication interface resources configured by the access network device for the terminal.

[0014] In a possible implementation manner of the first aspect, before the terminal receives the resource information from the access network device, the method further includes: the terminal requests the access network device for direct communication interface resources.

[0015] In a possible implementation of the first aspect, the data is data of a first application of the terminal, and the direct communication interface resource is used to transmit the data of the first application. The first application is an application that uses the direct communication interface for communication, for example, using the direct communication interface to send / broadcast information of a vulnerable roadside unit (VRU).

[0016] In a possible implementation manner of the first aspect, the first application belongs to an allowed service of the terminal. Further, the method may also include: the terminal determines an identifier of the allowed service of the terminal.

[0017] In a possible implementation of the first aspect, the terminal determines the identifier of the allowed service of the terminal, including: the terminal receives the identifier of the allowed service of the terminal from the access management network element. By receiving the identifier of the allowed service from the access management network element, the terminal can determine the identifier of the service that the network side (for example, the access management network element) allows the terminal to transmit. In other words, the terminal cannot transmit the non-allowed service of the terminal.

[0018] In a possible implementation of the first aspect, the allowed services of the terminal may refer to services allowed by the terminal on the direct communication interface, so that the terminal can easily determine the services allowed by the network side (eg, access management network element) to be transmitted by the terminal on the direct communication interface.

[0019] In a possible implementation of the first aspect, the allowed services of the terminal include not only the services allowed by the terminal on the direct communication interface, but also the services allowed on the non-direct communication interface (for example, Uu communication interface), which is not limited in this embodiment of the present application.

[0020] In a possible implementation of the first aspect, before the terminal receives the identifier of the terminal's allowed service from the access management network element, the method further includes: the terminal sends the identifier of at least one service to the access management network element. The identifier of the at least one service is used to indicate the service requested by the terminal. At least one service may be a service transmitted through a direct communication interface, for example, a V2X service. Accordingly, the identifier of at least one service is used to indicate the service that the terminal requests to be transmitted through the direct communication interface. This makes it easier for the network side to determine which services the data requested by the terminal to be transmitted on the direct communication interface comes from, thereby authorizing the service requested to be transmitted by the terminal.

[0021] In a possible implementation of the first aspect, an identifier of at least one service is carried in a first message, and the first message further includes a first parameter, and the first parameter is used to characterize that the terminal requests to use a network scheduling mode to transmit data on a direct communication interface. In order to use the first parameter to indicate to the access management network element that the terminal requests to use a network scheduling mode to transmit data on a direct communication interface. This facilitates the network side to determine that the terminal requires the use of a network scheduling mode to transmit data on a direct communication interface, that is, the terminal requests to use the direct communication interface resources configured by the access network device to transmit data.

[0022] In a possible implementation of the first aspect, before the terminal transmits data on the direct communication interface resources, the method further includes: the terminal receives first indication information, the first indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit the data of the first application when it is in the RRC-inactive state, and accordingly, the terminal transmits data through the direct communication interface resources, including: the terminal transmits the data of the first application through the direct communication interface resources according to the first indication information. This facilitates the terminal to determine that when the terminal is in the RRC-inactive state, it can continue to transmit the data of the first application on the direct communication interface resources obtained based on the network scheduling mode according to the first indication information. Among them, the first indication information can be an independent indication sent to the terminal by the access network device, or it can be the above-mentioned direct communication interface resources configured by the access network device for the terminal. The terminal can use the above-mentioned direct communication interface resources to send the data of the first application on the direct communication interface according to the independent indication when the terminal is in the RRC-inactive state. Alternatively, the terminal may also send the data of the first application on the direct communication interface by using the direct communication interface resources sent to the terminal by the access network device when in the RRC-inactive state.

[0023] In a possible implementation manner of the first aspect, the terminal receiving the first indication information may be implemented in the following manner: the terminal receives the first indication information from an access management network element, or the terminal receives the first indication information from an access network device.

[0024] In a possible implementation of the first aspect, the first message further includes a first link identifier, which indicates a communication link used by the terminal to transmit data on the direct communication interface. For example, the first link identifier may include a first identifier and a second identifier, the first identifier being a source address, i.e., the address of the terminal, and the second identifier being a destination address, i.e., the address of a device receiving data of the first application. The first link identifier may also be an identifier assigned by the terminal to the direct communication interface communication link, which is used to uniquely identify the direct communication interface communication link of the terminal.

[0025] In a possible implementation of the first aspect, the allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface. It should be understood that the allowed service of the terminal may also be other services except the service that is allowed to be transmitted through the direct communication interface.

[0026] In a possible implementation manner of the first aspect, the method further includes: the terminal sends a first quality of service parameter to the access management network element, where the first quality of service parameter is a quality of service parameter used by the terminal to request data transmission on the direct communication interface. The first quality of service parameter can be used by the access management network element to determine an authorized quality of service parameter for the terminal.

[0027] In a possible implementation manner of the first aspect, the method further includes: the terminal receiving authorized quality of service parameters from the access management network element, where the authorized quality of service parameters are used by the terminal to transmit data on the direct communication interface.

[0028] In a possible implementation of the first aspect, the data is data of a first application, the direct communication interface is a PC5 interface, and the method further includes: the terminal generates a PC5 interface service quality flow (PC5 QoS Flow) corresponding to the first application. The terminal associates the data of the first application to the PC5 interface service quality flow. Among them, the first application can be one of the allowed services of the terminal. The PC5 interface service quality flow may include a PC5 interface packet filter (packet filter), wherein a parameter value in the PC5 interface packet filter (packet filter) is an identifier of the first application. For example, the one parameter may be a PC5 interface service quality flow identifier (PC5 QoS Flow identifier, PFI). The terminal associates the data of the first application to the PC5 interface service quality flow according to the PC5 interface packet filter, so that the data of the first application is transmitted in the PC5 interface service quality flow.

[0029] In a possible implementation of the first aspect, the terminal generates a PC5 interface service quality flow corresponding to the first application, including: the terminal receives configuration information from a policy control network element, and the terminal generates the PC5 interface service quality flow corresponding to the first application according to the configuration information.

[0030] In a possible implementation manner of the first aspect, the terminal generates a PC5 interface service quality flow corresponding to the first application, including: the terminal receives the PC5 interface service quality flow corresponding to the first application from a policy control network element.

[0031] In a possible implementation manner of the first aspect, the terminal generates a PC5 interface service quality flow corresponding to the first application, including: the terminal generates the PC5 interface service quality flow corresponding to the first application according to preconfigured parameters.

[0032] In a possible implementation of the first aspect, the method further includes: the terminal sends a second parameter to the access management network element, the second parameter being used to indicate that the terminal stops transmitting data on the direct communication interface. The second parameter is used by the access management network element to instruct the access network device to release the direct communication interface resources configured for the terminal.

[0033] In a possible implementation manner of the first aspect, before the terminal transmits data through the direct communication interface resources, the method further includes: the terminal enters an RRC-inactive state; or the terminal enters a power saving mode in an RRC-activated state.

[0034] In a possible implementation of the first aspect, the method further includes: the terminal receives a first notification message from the access network device, the first notification message is used to notify the terminal to enter the RRC-inactive state. Accordingly, the terminal enters the RRC-inactive state, including: the terminal enters the RRC-inactive state according to the first notification message.

[0035] In a possible implementation of the first aspect, the method further includes: the terminal receives a second notification message from the access network device, the second notification message is used to notify the terminal to enter the power saving mode, and the state of the terminal is the RRC-activated state. Accordingly, the terminal enters the power saving mode, including: the terminal enters the power saving mode according to the first notification message.

[0036] In a possible implementation manner of the first aspect, the method further includes: the terminal sending a fifth message to the access management network element, where the fifth message indicates that the terminal supports sending data of the first application.

[0037] In a possible implementation manner of the first aspect, the method may further include: the terminal sending a third parameter to the access management network element, where the third parameter is used to represent that the terminal requests to use a network scheduling mode on the direct communication interface.

[0038] In a possible implementation manner of the first aspect, the method may further include: the terminal receives second indication information, the second indication information being used to indicate that the terminal is allowed to use a direct communication interface resource based on a network scheduling mode to transmit data when the terminal is in an RRC-activated state and in a power saving mode. The terminal transmits data through the direct communication interface resource, including: the terminal transmits the data through the direct communication interface resource according to the second indication information.

[0039] In a possible implementation of the first aspect, the method provided by the embodiment of the present application may further include: the terminal receives second indication information, the second indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit data when it is in the RRC-activated state and in the power saving mode. The terminal transmits data through the direct communication interface resources, including: the terminal transmits the above data through the direct communication interface resources according to the second indication information.

[0040] In a possible implementation manner of the first aspect, the terminal receives the second indication information, including: the terminal receives the second indication information from an access management network element, or the terminal receives the second indication information from an access network device.

[0041] In a second aspect, an embodiment of the present application provides a communication method, including: an access network device sends resource information to a terminal, the resource information is used to characterize direct communication interface resources, and the direct communication interface resources are used to transmit data when the terminal is in a wireless resource control RRC-inactive state, or in an RRC-activated state and a power saving mode is used.

[0042] In a possible implementation manner of the second aspect, the direct communication interface resource is a direct communication interface resource based on a network scheduling mode.

[0043] In a possible implementation of the second aspect, the method further includes: the access network device receives a preferred scheduling mode of the terminal from the access management network element. The access network device sending resource information to the terminal may include: the access network device sending resource information to the terminal according to the preferred scheduling mode of the terminal. The priority scheduling mode is a network scheduling mode.

[0044] In a possible implementation manner of the second aspect, the method further includes: the access network device receives a request message from the terminal, where the request message is used to request the direct communication interface resource.

[0045] In a possible implementation manner of the second aspect, the data is data of the first application, and the preferred scheduling mode is the preferred scheduling mode corresponding to the first application.

[0046] In a possible implementation manner of the second aspect, the first application belongs to an allowed service of the terminal.

[0047] In a possible implementation manner of the second aspect, the allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface.

[0048] In a possible implementation of the second aspect, the method further includes: the access network device sends a first indication message to the terminal, the first indication message being used to indicate that the terminal is allowed to use a direct communication interface resource based on a network scheduling mode to transmit data of a first application when the terminal is in an RRC-inactive state; or, the first indication message being used to indicate that the terminal is allowed to use a direct communication interface resource based on a network scheduling mode to transmit data of the first application when the terminal is in an RRC-activated state and in a power saving mode.

[0049] In a possible implementation manner of the second aspect, the method further includes: the access network device sends a first notification message to the terminal, where the first notification message is used to notify the terminal to enter the RRC-inactive state from the RRC-activated state.

[0050] In a possible implementation manner of the second aspect, the method further includes: the access network device sends a first notification message to the terminal, where the first notification message is used to notify the terminal to enter a power saving mode, and the terminal is in an RRC-activated state.

[0051] In a possible implementation of the second aspect, the method further includes: within a preset time, if there is no data transmission on the Uu interface between the terminal and the access network device, the access network device sends a first notification message to the terminal according to the third indication information, and the first notification message is used to notify the terminal to enter the RRC-inactive state from the RRC-activated state. The third indication information is used to indicate that when there is no data on the Uu interface between the access network device and the terminal within a preset time (for example, 30s), the access network device needs to configure the terminal to enter the RRC-inactive state, and the terminal can use the direct communication interface resources configured by the access network device for the terminal to transmit data in the RRC-inactive state.

[0052] In a possible implementation of the second aspect, the method further includes: within a preset time, if there is no data transmission on the Uu interface between the terminal and the access network device, the access network device sends a second notification message to the terminal according to the fourth indication information, and the second notification message is used to configure the terminal to maintain the RRC connection between the terminal and the access network device, and when the terminal maintains the RRC connection between the terminal and the access network device, the terminal uses power-saving technology, in other words, the second notification message is used to notify the terminal to enter the power-saving mode in the RRC-activated state. The fourth indication information is used to indicate the access network device that when there is no data on the Uu interface between the access network device and the terminal within a preset time (for example, 30s), the access network device needs to maintain the RRC connection between the terminal, and the access network device needs to configure the terminal to use power-saving technology.

[0053] In a possible implementation manner of the second aspect, the method further includes: when the terminal stops transmitting data through the direct communication interface resources, the access network device releases the direct communication interface resources; or, the access network device receives indication information from the access management network element or the terminal, the indication information is used to indicate the release of the direct communication interface resources or to indicate the terminal to stop transmitting data through the direct communication interface resources, and the access network device releases the direct communication interface resources.

[0054] In a possible implementation manner of the second aspect, the method further includes: the access network device determines to release the direct communication interface resources configured for the terminal, and the access network device releases the direct communication interface resources configured for the terminal.

[0055] In a possible implementation of the second aspect, the access network device determines to release the direct communication interface resources configured for the terminal, including: the access network device receives indication information from the access management network element, the indication information is used to indicate the release of the direct communication interface resources configured for the terminal. The access network device determines to release the direct communication interface resources configured for the terminal according to the indication information.

[0056] In a possible implementation manner of the second aspect, the method further includes: the access network device receiving third indication information or fourth indication information from the access management network element.

[0057] In a possible implementation of the second aspect, the above method may also include: the access network device determines, based on the fourth indication information, that the terminal is allowed to continue transmitting data of the first application in the RRC-activated state and using the direct communication interface resources based on the network scheduling mode when adopting the power saving mode.

[0058] In a possible implementation manner of the second aspect, the above method may also include: the access network device determines, based on the third indication information, that the terminal is allowed to continue transmitting data of the first application using direct communication interface resources based on the network scheduling mode when the terminal is in the RRC-inactive state.

[0059] In a possible implementation manner of the second aspect, the method further includes: the access network device receives a first request message from the terminal, where the first request message is used to request configuration of resources for the terminal to transmit data of the first application on the direct communication interface.

[0060] In a third aspect, an embodiment of the present application provides a communication method, including: an access management network element obtains subscription information of a terminal, and the access management network element sends an identifier of a permitted service of the terminal to the terminal according to the subscription information.

[0061] In a possible implementation of the third aspect, the access management network element sends the identifier of the allowed service of the terminal to the terminal according to the contract information, including: the access management network element obtains the identifier of the allowed service of the terminal from the contract information. Then the access management network element sends the identifier of the allowed service of the terminal to the terminal.

[0062] In a possible implementation manner of the third aspect, before sending the identifier of the terminal's allowed services to the terminal, the method further includes: the access management network element receives the identifier of at least one service from the terminal, and the identifier of the at least one service is used to indicate the service requested by the terminal.

[0063] In a possible implementation manner of the third aspect, the identifier of the at least one service is used to indicate a service that the terminal requests to be transmitted on the direct communication interface.

[0064] In a possible implementation of the third aspect, an identifier of at least one service is carried in a first message, and the first message further includes a first parameter, and the first parameter is used to characterize that the terminal requests to use a network scheduling mode to transmit data on a direct communication interface. The above method may also include: the access management network element sends a first indication information to the access network device or the terminal according to the first parameter, and the first indication information is used to indicate that the terminal is allowed to use a direct communication interface resource based on a network scheduling mode to transmit data of a first application in an RRC-inactive state, and the first application belongs to at least one service.

[0065] In a possible implementation manner of the third aspect, the first message further includes a first link identifier, where the first link identifier indicates a communication link used for the terminal to transmit data on the direct communication interface.

[0066] In a possible implementation manner of the third aspect, the method further includes: the access management network element sends an authorized quality of service parameter to the terminal, where the authorized quality of service parameter is used by the terminal to transmit data on the direct communication interface.

[0067] In a possible implementation manner of the third aspect, the method further includes: the access management network element receives a first quality of service parameter from the terminal, where the first quality of service parameter is a quality of service parameter used by the terminal to request data transmission on the direct communication interface.

[0068] In a possible implementation manner of the third aspect, the method further includes: the access management network element receives a second parameter from the terminal, the second parameter is used to indicate that the terminal stops transmitting data on the direct communication interface. The access management network element instructs the access network device to release the direct communication interface resources of the terminal according to the second parameter. Alternatively, the second parameter is used to indicate that the terminal stops transmitting data of the first application on the direct communication interface.

[0069] In a possible implementation of the third aspect, the method provided in the embodiment of the present application further includes: the access management network element sends the preferred scheduling mode of the terminal to the access network device. For example, the preferred scheduling mode of the terminal may be a network scheduling mode.

[0070] In a possible implementation manner of the third aspect, the allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface.

[0071] In a possible implementation of the third aspect, the method further includes: the access management network element receives a third parameter from the terminal, the third parameter representing the terminal's request to use the network scheduling mode on the direct communication interface. The access management network element sends second indication information to the access network device or the terminal based on the third parameter, the second indication information being used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit data when it is in the RRC-inactive state. Alternatively, the second indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit data when it is in the RRC-activated state and in the power saving mode.

[0072] In a fourth aspect, an embodiment of the present application provides a communication device, which can implement a communication method described in the first aspect or any possible implementation of the first aspect, and thus can also achieve the beneficial effects of the first aspect or any possible implementation of the first aspect. The communication device can be a terminal, or a device that can support the terminal to implement the first aspect or any possible implementation of the first aspect. For example, a chip applied to a terminal. The communication device can implement the above method through software, hardware, or by executing corresponding software through hardware.

[0073] In one example, the communication device may be a terminal or a chip used in a terminal, and the communication device includes: a communication unit and a processing unit, wherein the processing unit is used to process information, and the communication unit is used to send and receive information. For example, the communication unit is used to receive resource information from an access network device, and the resource information is used to characterize direct communication interface resources. The communication unit is also used to transmit data through direct communication interface resources, wherein the terminal is in a radio resource control RRC-inactive state, or the terminal is in an RRC-activated state, and the terminal adopts a power saving mode.

[0074] The direct communication interface refers to a communication interface between two terminals that communicates without being transferred through a base station. The direct communication interface communication includes control signaling and data transmission. The direct communication interface can also be called a PC5 interface.

[0075] In a possible implementation manner of the fourth aspect, the direct communication interface resource is a direct communication interface resource based on a network scheduling mode.

[0076] In a possible implementation of the fourth aspect, the communication unit is used to transmit data through the direct communication interface resources before the processing unit is used to determine whether the network side (for example, the access management network element) allows the terminal to use the above-mentioned direct communication interface resources based on the network scheduling mode configured for the terminal by the access network device to transmit data.

[0077] In a possible implementation manner of the fourth aspect, the communication unit is further configured to request a direct communication interface resource from the access network device.

[0078] In a possible implementation of the fourth aspect, the data is data of a first application of the terminal, and the direct communication interface resource is used to transmit the data of the first application. The first application is an application that uses the direct communication interface for communication, for example, using the direct communication interface to send / broadcast information of a vulnerable roadside unit (VRU).

[0079] In a possible implementation manner of the fourth aspect, the first application belongs to an allowed service of the terminal, and the processing unit is further configured to determine an identifier of the allowed service of the terminal.

[0080] In a possible implementation manner of the fourth aspect, the processing unit is configured to receive, through the communication unit, an identifier of an allowed service of the terminal from an access management network element to determine the identifier of the allowed service of the terminal.

[0081] In a possible implementation of the fourth aspect, the communication unit is further used to send at least one service identifier to the access management network element, and the at least one service identifier is used to indicate the service requested by the terminal. At least one service may be a service transmitted through a direct communication interface, for example, a V2X service. Accordingly, the at least one service identifier is used to indicate the service that the terminal requests to be transmitted through the direct communication interface. This makes it easier for the network side to determine which services the data requested to be transmitted by the terminal comes from, thereby authorizing the application requested to be transmitted by the terminal.

[0082] In a possible implementation of the fourth aspect, the identifier of at least one service is carried in the first message, and the first message further includes a first parameter, which is used to characterize that the terminal requests to use the network scheduling mode to transmit data on the direct communication interface. In order to use the first parameter to indicate to the access management network element that the terminal requests to use the network scheduling mode to transmit data on the direct communication interface. This makes it easier for the network side to determine that the terminal requires the use of the network scheduling mode to transmit data on the PC5 interface communication link, that is, the terminal requests to use the direct communication interface resources configured by the access network device to transmit data.

[0083] In a possible implementation of the fourth aspect, the communication unit is further used to receive first indication information, the first indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit the data of the first application when it is in the RRC-inactive state; accordingly, the communication unit is also used to transmit the data of the first application through the direct communication interface resources according to the first indication information. This facilitates the processing unit to determine that when the terminal is in the RRC-inactive state, it can continue to transmit the data of the first application on the direct communication interface resources obtained based on the network scheduling mode. Among them, the first indication information can be an independent indication sent by the access network device to the terminal, or it can be the above-mentioned direct communication interface resources configured by the access network device for the terminal. The processing unit can use the above-mentioned direct communication interface resources to send the data of the first application on the direct communication interface through the communication unit according to the independent indication when the terminal is in the RRC-inactive state. Alternatively, the processing unit can also use the above-mentioned direct communication interface resources to send the data of the first application on the direct communication interface through the communication unit according to the above-mentioned direct communication interface resources sent by the access network device to the terminal when the terminal is in the RRC-inactive state.

[0084] In a possible implementation manner of the fourth aspect, the communication unit is further used to receive first indication information from an access management network element, or receive first indication information from an access network device.

[0085] In a possible implementation of the fourth aspect, the first message further includes a first link identifier, which indicates a communication link used by the terminal to transmit data on the direct communication interface. For example, the first link identifier may include a first identifier and a second identifier, the first identifier being a source address, i.e., an address of the terminal, and the second identifier being a destination address, i.e., an address of a device receiving data of the first application. The first link identifier may also be an identifier assigned by the terminal to the PC5 communication link, which is used to uniquely identify the terminal PC5 communication link.

[0086] In a possible implementation manner of the fourth aspect, the allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface. It should be understood that the allowed service of the terminal may also be other services except the service that is allowed to be transmitted through the direct communication interface.

[0087] In a possible implementation manner of the fourth aspect, the communication unit is further configured to send a first quality of service parameter to the access management network element, where the first quality of service parameter is a quality of service parameter used by the terminal to request data transmission on the direct communication interface, so that the access management network element determines an authorized quality of service parameter for the terminal according to the first quality of service parameter.

[0088] In a possible implementation of the fourth aspect, the communication unit is further configured to receive an authorized quality of service parameter from an access management network element, the authorized quality of service parameter being used by the terminal to transmit data on the direct communication interface. The authorized quality of service parameter is determined by the first quality of service parameter.

[0089] In a possible implementation of the fourth aspect, the data is data of the first application, the direct communication interface is a PC5 interface, and the processing unit is further used to generate a PC5 interface service quality flow (PC5 QoS Flow) corresponding to the first application. The processing unit is also used to associate the data of the first application with the PC5 interface service quality flow. The first application in the embodiment of the present application can be one of the allowed services of the terminal. The PC5 interface service quality flow includes a PC5 interface packet filter (packet filter), wherein a parameter value in the PC5 interface packet filter (packet filter) is an identifier of the first application. For example, the one parameter can be a PC5 interface service quality flow identifier (PC5 QoS Flow identifier, PFI). The processing unit is used to associate the data of the first application with the PC5 interface service quality flow according to the PC5 interface packet filter, so that the data of the first application is transmitted in the PC5 interface service quality flow.

[0090] In a possible implementation of the fourth aspect, the processing unit is used to receive configuration information from the policy control network element through the communication unit, and the processing unit is used to generate a PC5 interface service quality flow corresponding to the first application according to the configuration information.

[0091] In a possible implementation manner of the fourth aspect, the processing unit is configured to receive, through the communication unit, a PC5 interface service quality flow corresponding to the first application from the policy control network element.

[0092] In a possible implementation manner of the fourth aspect, the processing unit is configured to generate a PC5 interface service quality flow corresponding to the first application according to preconfigured parameters.

[0093] In a possible implementation of the fourth aspect, the communication unit is used to send a second parameter to the access management network element, where the second parameter is used to indicate that the terminal stops transmitting data on the direct communication interface. The second parameter facilitates the access management network element to instruct the access network device to release the direct communication interface resources configured for the terminal.

[0094] In a possible implementation of the fourth aspect, before the communication unit transmits data through the direct communication interface resource, the processing unit is further used to control the terminal to enter the RRC-inactive state. Or the processing unit is further used to control the terminal to enter the power saving mode in the RRC-activated state.

[0095] In a possible implementation of the fourth aspect, the communication unit is further configured to receive a first notification message from an access network device, where the first notification message is used to notify the terminal to enter an RRC-inactive state. A corresponding processing unit is configured to control the terminal to enter an RRC-inactive state, including: a processing unit configured to control the terminal to enter an RRC-inactive state according to the first notification message.

[0096] In a possible implementation of the fourth aspect, the communication unit is further used to receive a first notification message from the access network device, the first notification message is used to notify the terminal to enter the RRC-activated state and adopt the power saving mode. The corresponding processing unit is used to control the terminal to enter the RRC-activated state and adopt the power saving mode, including: the processing unit is used to control the terminal to enter the RRC-activated state and adopt the power saving mode according to the first notification message.

[0097] In a possible implementation manner of the fourth aspect, the communication unit is further used to send a fifth message to the access management network element, where the fifth message indicates that the terminal supports sending data of the first application.

[0098] In a possible implementation manner of the fourth aspect, the communication unit is further used for the terminal to send a third parameter to the access management network element, where the third parameter is used to represent that the terminal requests to use a network scheduling mode on the direct communication interface.

[0099] In a possible implementation of the fourth aspect, the communication unit is further configured to receive second indication information, where the second indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit data when the terminal is in the RRC-activated state and in the power saving mode. The communication unit is configured to transmit data through the direct communication interface resources, including: a communication unit is configured to transmit the above data through the direct communication interface resources according to the second indication information.

[0100] In a possible implementation manner of the fourth aspect, the communication unit is configured to receive second indication information from an access management network element, or the terminal receives second indication information from an access network device.

[0101] In another example, an embodiment of the present application provides a communication device, which may be a terminal or a chip in a terminal. The communication device may include a communication unit. When the communication device is a terminal, the communication device may further include a processing unit and a storage unit. The communication unit may be a transceiver for sending and receiving data / information, and the storage unit may be a memory. The storage unit is used to store computer program code, and the computer program code includes instructions. The processing unit may be a processor. The processing unit executes the instructions stored in the storage unit so that the terminal implements a communication method described in the first aspect or any possible implementation of the first aspect. When the communication device is a chip in a terminal, the processing unit may be a processor, and the communication interface may be an input / output interface, a pin or a circuit, etc. The processing unit executes the computer program code stored in the storage unit so that the terminal implements a communication method described in the first aspect or any possible implementation of the first aspect, and the storage unit may be a storage unit in the chip (for example, a register, a cache, etc.), or a storage unit in the terminal located outside the chip (for example, a read-only memory, a random access memory, etc.).

[0102] Optionally, the processor, the communication interface and the memory are coupled to each other.

[0103] In a fifth aspect, an embodiment of the present application provides a communication device, which can implement a communication method described in the second aspect or any possible implementation of the second aspect, and thus can also achieve the beneficial effects of the second aspect or any possible implementation of the second aspect. The communication device can be an access network device, or a device that can support the access network device to implement the second aspect or any possible implementation of the second aspect. For example, a chip used in an access network device. The communication device can implement the above method through software, hardware, or by executing corresponding software through hardware.

[0104] In one example, an embodiment of the present application provides a communication device, including: a processing unit and a communication unit, the processing unit is used to perform information or data processing, and the communication unit is used to perform information or receipt sending and receiving operations. For example, the communication unit is used to send resource information to a terminal, the resource information is used to characterize direct communication interface resources, and the direct communication interface resources are used for the terminal to transmit data when it is in a radio resource control RRC-inactive state, or although the terminal is in an RRC-activated state, the terminal adopts a power saving mode.

[0105] In a possible implementation manner of the fifth aspect, the direct communication interface resource is a direct communication interface resource based on a network scheduling mode.

[0106] In a possible implementation of the fifth aspect, a communication unit is used to receive a preferred scheduling mode of a terminal from an access management network element. The communication unit is used to send resource information to the terminal, including: a processing unit is used to send resource information to the terminal using the communication unit according to the preferred scheduling mode of the terminal. The priority scheduling mode is a network scheduling mode.

[0107] In a possible implementation manner of the fifth aspect, a communication unit is used to send resource information to a terminal, including: a communication unit is used to receive a request message from the terminal, wherein the request message is used to request the direct communication interface resource.

[0108] In a possible implementation manner of the fifth aspect, the data is data of the first application, and the preferred scheduling mode is the preferred scheduling mode corresponding to the first application.

[0109] In a possible implementation manner of the fifth aspect, the first application belongs to an allowed service of the terminal.

[0110] In a possible implementation manner of the fifth aspect, the allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface.

[0111] In a possible implementation manner of the fifth aspect, the communication unit is used to send first indication information to the terminal, where the first indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit data of the first application when it is in the RRC-inactive state. Alternatively, the first indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit data of the first application when it is in the RRC-activated state and in the power saving mode.

[0112] In a possible implementation manner of the fifth aspect, the communication unit is used to send a first notification message to the terminal, where the first notification message is used to notify the terminal to enter an RRC-inactive state from an RRC-activated state.

[0113] In a possible implementation manner of the fifth aspect, the communication unit is used to send a first notification message to the terminal, where the first notification message is used to notify the terminal to adopt a power saving mode in an RRC-activated state.

[0114] In a possible implementation of the fifth aspect, within a preset time, if there is no data transmission on the Uu interface between the terminal and the access network device, the processing unit is used to send a first notification message to the terminal through the communication unit according to the third indication information, and the first notification message is used to notify the terminal to enter the RRC-inactive state. The third indication information is used to indicate that when there is no data on the Uu interface between the access network device and the terminal within a preset time (for example, 30s), the access network device needs to configure the terminal to enter the RRC-inactive state from the RRC-activated state, and the terminal can continue to use the direct communication interface resources configured by the access network device for the terminal to transmit data in the RRC-inactive state.

[0115] In a possible implementation of the fifth aspect, within a preset time, if there is no data transmission on the Uu interface between the terminal and the access network device, the processing unit is used to send a second notification message to the terminal through the communication unit according to the fourth indication information, and the second notification message is used to configure the terminal to maintain the RRC connection between the terminal and the access network device, and when the terminal maintains the RRC connection between the terminal and the access network device, the terminal uses power saving technology, in other words, the second notification message is used to notify the terminal to enter the power saving mode in the RRC-activated state. The fourth indication information is used to indicate the access network device that when there is no data on the Uu interface between the access network device and the terminal within a preset time (for example, 30s), the access network device needs to maintain the RRC connection between the terminal, and the access network device needs to configure the terminal to use power saving technology.

[0116] In a possible implementation of the fifth aspect, when the terminal stops transmitting data through the direct communication interface resources, the processing unit is also used to release the direct communication interface resources, or when the communication unit receives indication information from the access management network element or the terminal, the indication information is used to indicate the release of the above-mentioned direct communication interface resources or to instruct the terminal to stop transmitting data through the above-mentioned direct communication interface resources, and the processing unit is used to release the above-mentioned direct communication interface resources.

[0117] In a possible implementation of the fifth aspect, the communication unit is configured to receive instruction information from an access management network element, the instruction information being used to instruct the terminal to stop transmitting data through the direct communication interface resources. The processing unit is configured to determine, according to the instruction information, that the terminal stops transmitting data through the direct communication interface resources.

[0118] In a possible implementation manner of the fifth aspect, the processing unit is configured to determine to release the direct communication interface resources configured for the terminal, and the processing unit releases the direct communication interface resources configured for the terminal.

[0119] In a possible implementation of the fifth aspect, a processing unit, configured to determine to release a direct communication interface resource configured for a terminal, includes: a communication unit, configured to receive indication information from an access management network element, the indication information being used to indicate to release the direct communication interface resource configured for the terminal. The processing unit, configured to determine to release the direct communication interface resource configured for the terminal according to the indication information.

[0120] In a possible implementation manner of the fifth aspect, the communication unit is further used to receive third indication information or fourth indication information from an access management network element.

[0121] In a possible implementation of the fifth aspect, the processing unit is further used to determine, based on the fourth indication information, that the terminal is allowed to continue transmitting data of the first application using direct communication interface resources based on a network scheduling mode when in an RRC-activated state and in a power saving mode.

[0122] In a possible implementation of the fifth aspect, the processing unit is further used to determine, based on the third indication information, that when the terminal is in an RRC-inactive state, it is allowed to continue transmitting data of the first application using direct communication interface resources based on a network scheduling mode.

[0123] In a possible implementation manner of the fifth aspect, the communication unit is further used to receive a first request message from the terminal, where the first request message is used to request configuration of resources for the terminal for transmitting data of the first application on the direct communication interface.

[0124] In another example, an embodiment of the present application provides a communication device, which may be an access network device or a chip in an access network device. The communication device may include a communication unit. When the communication device is an access network device, the communication device may further include a processing unit and a storage unit. The communication unit may be a transceiver for transmitting and receiving data / information, and the storage unit may be a memory. The storage unit is used to store computer program code, and the computer program code includes instructions. The processing unit may be a processor. The processing unit executes the instructions stored in the storage unit so that the access network device implements a communication method described in the second aspect or any possible implementation of the second aspect. When the communication device is a chip in an access network device, the processing unit may be a processor, and the communication interface may be an input / output interface, a pin or a circuit, etc. The processing unit executes the computer program code stored in the storage unit so that the access network device implements a communication method described in the second aspect or any possible implementation of the second aspect, and the storage unit may be a storage unit in the chip (for example, a register, a cache, etc.), or a storage unit in the access network device located outside the chip (for example, a read-only memory, a random access memory, etc.).

[0125] Optionally, the processor, the communication interface and the memory are coupled to each other.

[0126] In a sixth aspect, an embodiment of the present application provides a communication device, which can implement a communication method described in the third aspect or any possible implementation of the third aspect, and thus can also achieve the beneficial effects of the third aspect or any possible implementation of the third aspect. The communication device can be an access management network element, or a device that can support the access management network element to implement the third aspect or any possible implementation of the third aspect. For example, a chip used in an access management network element. The communication device can implement the above method through software, hardware, or by executing corresponding software through hardware.

[0127] In one example, an embodiment of the present application provides a communication device, the communication device comprising: a communication unit, configured to obtain contract information of a terminal, and the communication unit, configured to send an identifier of a permitted service of the terminal to the terminal according to the contract information.

[0128] In a possible implementation of the sixth aspect, the processing unit is configured to obtain the identifier of the allowed service of the terminal from the contract information, and then send the identifier of the allowed service of the terminal to the terminal through the communication unit.

[0129] In a possible implementation of the sixth aspect, before the communication unit is used to send an identifier of the terminal's allowed services to the terminal, the communication unit is also used to receive an identifier of at least one service from the terminal, and the identifier of the at least one service is used to indicate the service requested by the terminal.

[0130] In a possible implementation manner of the sixth aspect, the identifier of the at least one service is used to indicate the service that the terminal requests to be transmitted on the direct communication interface.

[0131] In a possible implementation of the sixth aspect, an identifier of at least one service is carried in a first message, and the first message further includes a first parameter, and the first parameter is used to characterize that the terminal requests to use a network scheduling mode to transmit data on a direct communication interface. The processing unit is further used to send first indication information to an access network device or a terminal according to the first parameter, and the first indication information is used to indicate that the terminal is allowed to use a direct communication interface resource based on a network scheduling mode to transmit data of a first application in an RRC-inactive state, and the first application belongs to at least one service.

[0132] In a possible implementation manner of the sixth aspect, the first message further includes a first link identifier, where the first link identifier indicates a communication link used for the terminal to transmit data on the direct communication interface.

[0133] In a possible implementation manner of the sixth aspect, the communication unit is further used to send an authorized quality of service parameter to the terminal, where the authorized quality of service parameter is used by the terminal to transmit data on the direct communication interface.

[0134] In a possible implementation manner of the sixth aspect, the communication unit is further configured to receive a first quality of service parameter from the terminal, where the first quality of service parameter is a quality of service parameter used by the terminal to request data transmission on the direct communication interface.

[0135] In a possible implementation of the sixth aspect, the communication unit is further configured to receive a second parameter from the terminal, the second parameter being used to indicate that the terminal stops transmitting data on the direct communication interface. The access management network element instructs the access network device to release the direct communication interface resources of the terminal according to the second parameter.

[0136] In a possible implementation manner of the sixth aspect, the communication unit is further configured to send the preferred scheduling mode of the terminal to the access network device.

[0137] In a possible implementation manner of the sixth aspect, the allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface.

[0138] In a possible implementation manner of the sixth aspect, the communication unit is further configured to receive a third parameter from the terminal, the third parameter representing a request by the terminal to use a network scheduling mode on the direct communication interface. The access management network element sends second indication information to the access network device or the terminal according to the third parameter, the second indication information being used to indicate that the terminal is allowed to transmit data using direct communication interface resources based on the network scheduling mode when in an RRC-inactive state.

[0139] As another example, an embodiment of the present application provides a communication device, which may be an access management network element or a chip in an access management network element. The communication device may include a communication unit. When the communication device is an access network device, the communication device may also include a processing unit and a storage unit. The communication unit may be a transceiver for sending and receiving data / information, and the storage unit may be a memory. The storage unit is used to store computer program code, and the computer program code includes instructions. The processing unit may be a processor. The processing unit executes the instructions stored in the storage unit so that the access management network element implements a communication method described in the third aspect or any possible implementation of the third aspect. When the communication device is a chip in an access management network element, the processing unit may be a processor, and the communication interface may be an input / output interface, a pin or a circuit, etc. The processing unit executes the computer program code stored in the storage unit so that the access management network element implements a communication method described in the third aspect or any possible implementation manner of the third aspect. The storage unit may be a storage unit within the chip (for example, a register, a cache, etc.) or a storage unit within the access management network element that is located outside the chip (for example, a read-only memory, a random access memory, etc.).

[0140] Optionally, the processor, the communication interface and the memory are coupled to each other.

[0141] In the seventh aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is run on a computer, the computer executes a communication method described in any possible implementation method of the first aspect to the first aspect.

[0142] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is run on a computer, the computer executes a communication method described in any possible implementation method of the second aspect to the second aspect.

[0143] In the ninth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is run on a computer, the computer executes a communication method described in any possible implementation method of the third aspect to the third aspect.

[0144] In a tenth aspect, an embodiment of the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute a communication method described in the first aspect or various possible implementations of the first aspect.

[0145] In an eleventh aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute a communication method described in the second aspect or various possible implementations of the second aspect.

[0146] In a twelfth aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute a communication method described in the second aspect or various possible implementations of the second aspect.

[0147] In the thirteenth aspect, an embodiment of the present application provides a communication system, which includes any one or more of the following: the communication device described in the fourth aspect and various possible implementations, and the communication device described in the fifth aspect and various possible implementations of the fifth aspect.

[0148] In a possible implementation, the communication system may further include: the communication device described in the sixth aspect and various possible implementations of the sixth aspect.

[0149] In a fourteenth aspect, an embodiment of the present application provides a communication device, which includes a processor and a storage medium, wherein the storage medium stores instructions, and when the instructions are executed by the processor, a communication method described in the first aspect or various possible implementation methods of the first aspect is implemented.

[0150] In a fifteenth aspect, an embodiment of the present application provides a communication device, which includes a processor and a storage medium, wherein the storage medium stores instructions, and when the instructions are executed by the processor, a communication method described in the second aspect or various possible implementation methods of the second aspect is implemented.

[0151] In the sixteenth aspect, an embodiment of the present application provides a communication device, which includes a processor and a storage medium, wherein the storage medium stores instructions, and when the instructions are executed by the processor, a communication method described in the third aspect or various possible implementation methods of the third aspect is implemented.

[0152] In the seventeenth aspect, the present application provides a chip or a chip system, which includes at least one processor and a communication interface, the communication interface and at least one processor are interconnected through lines, and the at least one processor is used to run computer programs or instructions to perform a communication method described in any one of the possible implementation methods of the first aspect to the first aspect.

[0153] In the eighteenth aspect, the present application provides a chip or a chip system, which includes at least one processor and a communication interface, the communication interface and at least one processor are interconnected through lines, and the at least one processor is used to run computer programs or instructions to perform a communication method described in any one of the possible implementation methods of the second aspect to the second aspect.

[0154] In the nineteenth aspect, the present application provides a chip or a chip system, which includes at least one processor and a communication interface, the communication interface and at least one processor are interconnected through lines, and the at least one processor is used to run computer programs or instructions to perform a communication method described in any one of the possible implementation methods of the third aspect to the third aspect.

[0155] The communication interface in the chip may be an input / output interface, a pin or a circuit.

[0156] In a possible implementation, the chip or chip system described above in the present application further includes at least one memory, in which instructions are stored. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

[0157] In the twentieth aspect, an embodiment of the present application provides a communication device, which includes a processor, the processor is coupled to a memory, the memory stores instructions, and the processor is used to execute the instructions to implement a communication method described in the first aspect or various possible implementation methods of the first aspect.

[0158] In the twenty-first aspect, an embodiment of the present application provides a communication device, which includes a processor, the processor is coupled to a memory, the memory stores instructions, and the processor is used to execute the instructions to implement a communication method described in the second aspect or various possible implementation methods of the second aspect.

[0159] In the twenty-second aspect, an embodiment of the present application provides a communication device, which includes a processor, the processor is coupled to a memory, the memory stores instructions, and the processor is used to execute the instructions to implement a communication method described in the third aspect or various possible implementation methods of the third aspect.

[0160] It can be understood that the memory described in aspects 20 to 22 of the embodiments of the present application can be located inside the communication device or outside the communication device, and the embodiments of the present application do not limit this.

[0161] The beneficial effects of the second to twenty-second aspects of the present application and their various implementations can be referred to the analysis of the beneficial effects of the first aspect and its various implementations, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0162] Figure 1 An architecture diagram of a communication system provided in an embodiment of the present application;

[0163] Figure 2 A 5G network architecture diagram provided for an embodiment of the present application;

[0164] Figure 3 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0165] Figures 4 to 13 A schematic diagram of a relevant interaction process of a communication method provided in an embodiment of the present application;

[0166] Fig.14 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0167] Fig.15 A schematic diagram of the structure of another communication device provided in an embodiment of the present application;

[0168] Fig.16 A schematic diagram of the structure of a chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0169] In order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish the same items or similar items with substantially the same functions and effects. For example, the first message and the second message are only used to distinguish different messages, and their order is not limited. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not necessarily limit them to be different.

[0170] It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0171] In the present application, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0172] The technical solution of the present application can be applied to various communication systems, such as: long time evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, public land mobile network (PLMN) system, device to device (D2D) network system or machine to machine (M2M) network system or new radio (NR) system or 5th generation (5G) network system and future network systems, etc.

[0173] The network architecture and service scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. It is known to those skilled in the art that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems. In the embodiments of the present application, the method provided is applied to an NR system or a 5G network as an example for explanation.

[0174] like Figure 1 As shown, Figure 1An architecture diagram of a communication system provided in an embodiment of the present application is shown, and the communication system includes: an access network device 10, a terminal 20 communicating with the access network device 10, and a terminal 30 communicating with the terminal 20. There is a first interface between the access network device 10 and the terminal 20, and there is a second interface between the terminal 20 and the terminal 30.

[0175] Exemplarily, the first interface may be called a Uu interface, which uses a cellular network frequency band (such as 1.8 GHz), and the Uu interface is a communication between the terminal and the network. Figure 1 As shown, for upload transmission, the terminal 10 can send data a to the access network device 10 through the Uu interface, and then the access network device 10 uses the core network to send the data a to the application server (application server, AS) (for example, V2X application server). Or for downlink transmission, the AS can send downlink data to the core network, and then the core network sends the downlink data to the access network device 10, and then the access network device 10 sends it to the terminal 10 using the Uu interface.

[0176] Exemplarily, the second interface can be called a direct communication interface. For example, the direct communication interface is a PC5 interface, which uses a dedicated frequency band for the Internet of Vehicles (such as 5.9GHz). The direct communication interface is an interface used for communication between terminals. For example, terminal 20 sends data b to terminal 30 through a direct communication interface. The difference between direct communication interface communication and Uu interface communication is that direct communication interface communication does not require network participation (data b does not pass through the base station). Of course, there can also be a first interface between the terminal 30 and the access network device 10. The direct communication interface is generally used in vehicle to everything (V2X) communication scenarios, or device to device (D2D) and other scenarios where direct communication can be performed between devices.

[0177] The names of the first interface and the second interface in the embodiment of the present application are merely examples, and the names of the first interface and the second interface are not limited in the embodiment of the present application.

[0178] In the embodiment of the present application, the communication between the terminal 20 and the terminal 30 is realized by using the side link on the direct communication interface. In the embodiment of the present application, the side link on the direct communication interface can be called a PC5 interface communication link or a direct communication interface link. The so-called PC5 interface communication link is a link in which one terminal 20 sends data to another terminal 30 on the direct communication interface link.

[0179] In the embodiment of the present application, the resources used for transmitting data between the terminal 20 and the terminal 30 using the direct communication interface may be referred to as direct communication interface resources.

[0180] In one possible implementation, Figure 1 As shown, the communication system may further include: an access management network element 40.

[0181] An example, Figure 1 The core network in may be a 4th generation (4G) core network (eg, an evolved packet core (EPC)) or a 5G core network (5G core, 5GC), or a core network in various future communication systems.

[0182] Taking the core network as an example, the access network device 10 may be an evolved Node B (eNB or eNodeB) in the 4G system. The terminal 20 or the terminal 30 is a terminal that can transmit information with the eNB. The eNB accesses the EPC network through the S1 interface. The network element or entity corresponding to the access management network element 40 may be a mobility management entity (MME).

[0183] Taking the core network as an example, the access network device 10 may be the next generation node B (gNB) in the NR system, and the terminal 20 or the terminal 30 may be a terminal that can transmit information with the gNB. The gNB accesses the 5GC through the NG interface, and the network element or entity corresponding to the access management network element 40 may be an access and mobility management function (AMF) network element.

[0184] For example, the core network is 5GC, and the access network device 10 is a (radio) access network ((radio) access network, (R) AN) as an example. Figure 2As shown, in addition to the AMF network elements mentioned above, 5GC may also include: session management function (SMF) network element, or policy control function (policy control function) network element or application function (AF) network element, network capability exposure function (NEF) network element, user database (User data repository, UDR), unified data management (UDM) network element, and user plane function (UPF) network element.

[0185] Among them, the terminal communicates with the AMF network element through the N1 interface (referred to as N1). The AMF entity communicates with the SMF network element through the N11 interface (referred to as N11). The SMF network element communicates with one or more UPF network elements through the N4 interface (referred to as N4). Any two UPF network elements among one or more UPF network elements communicate through the N9 interface (referred to as N9). The UPF network element communicates with the data network (DN) controlled by the AF network element through the N6 interface (referred to as N6). The terminal accesses the network through (R)AN), and (R)AN) communicates with the AMF network element through the N2 interface (referred to as N2). The SMF network element communicates with the PCF network element through the N7 interface (referred to as N7), and the PCF network element communicates with the AF network element through the N5 interface. (R)AN) communicates with the UPF network element through the N3 interface (referred to as N3). Any two AMF network elements communicate through the N14 interface (referred to as N14). The SMF network element communicates with the UDM through the N10 interface (referred to as N10). The AMF network element communicates with the AUSF network element through the N12 interface (referred to as N12). The AUSF network element communicates with the UDM network element through the N13 interface (referred to as N13). The AMF network element communicates with the UDM network element through the N8 interface (referred to as N8).

[0186] It should be understood that Figure 2In the network architecture shown, the control plane network elements may also interact using service-based interfaces. For example, AMF network elements, SMF network elements, UDM network elements, or PCF network elements interact using service-based interfaces. For example, the service-based interface provided by the AMF network element to the outside may be Namf. The service-based interface provided by the SMF network element to the outside may be Nsmf. The service-based interface provided by the UDM network element to the outside may be Nudm. The service-based interface provided by the PCF network element to the outside may be Npcf. It should be understood that the relevant descriptions of the names of the various service-based interfaces can refer to the 5G system architecture diagram in the prior art, which will not be repeated here.

[0187] It should be noted that Figure 2 Only one UPF network element and one SMF network element are given as examples. Of course, there may be multiple UPF network elements and SMF network elements, such as SMF network element 1 and SMF network element 2, which is not specifically limited in the embodiment of the present application.

[0188] It should be noted that Figure 2 The (R)AN), AMF network element, SMF network element, UDM network element, UPF network element and PCF network element are just names, and the names do not limit the devices themselves. In 5G networks and other future networks, the network elements or entities corresponding to (R)AN), AMF network elements, SMF network elements, UDM network elements, UPF network elements and PCF network elements may also be other names, and the embodiments of the present application do not make specific limitations on this. For example, the UDM network element may also be replaced by a home subscriber server (HSS) or a user subscription database (USD) or a database entity, etc., which are uniformly explained here and will not be repeated later.

[0189] The terminal may be a terminal device, including a device that provides voice and / or data connectivity to a user, specifically, a device that provides voice to a user, or a device that provides data connectivity to a user, or a device that provides voice and data connectivity to a user. 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 may communicate with a core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN. The terminal device may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, vehicle to everything (V2X) terminal equipment, machine-to-machine / machine-type communications (M2M / MTC) terminal equipment, Internet of Things (IoT) terminal equipment, subscriber unit (subscriberunit), subscriber station (subscriberstation), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (userterminal), user agent (user agent), or user equipment (user device), etc. For example, it may include a mobile phone (or so-called "cellular" phone), a computer with a mobile terminal device, a portable, pocket-sized, handheld, or computer-built-in mobile device, etc. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA), etc. It also includes limited devices, such as devices with low power consumption, or devices with limited storage capacity, or devices with limited computing power, etc. For example, it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), laser scanners, etc.

[0190] As an example but not limitation, in the embodiments of the present application, the terminal may also be a wearable device. Wearable devices may also be referred to as wearable smart devices or smart wearable devices, etc., which are a general term for the application of wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, etc., as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets, smart helmets, and smart jewelry for vital sign monitoring.

[0191] The various terminals introduced above, if located on a vehicle (eg, placed in or installed in a vehicle), can be considered as vehicle-mounted terminal devices, which are also called on-board units (OBU).

[0192] The method and apparatus provided in the embodiment of the present application can be applied to a terminal device or a network device, which includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software. Moreover, in the embodiment of the present application, the specific structure of the execution subject of the method for transmitting a signal is not particularly limited in the embodiment of the present application, as long as it can be communicated according to the method for transmitting a signal in the embodiment of the present application by running a program that records the code of the method for transmitting a signal in the embodiment of the present application, for example, the execution subject of the method for wireless communication in the embodiment of the present application can be a terminal device or a network device, or a functional module in a terminal device or a network device that can call a program and execute the program.

[0193] In addition, various aspects or features of the embodiments of the present application can be implemented as methods, devices or products using standard programming and / or engineering techniques. The term "product" used in this application covers computer programs that can be accessed from any computer-readable device, carrier or medium. For example, computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0194] The access network device 10 may also be referred to as a base station, which is an entity used in conjunction with a terminal to transmit or receive signals. It is mainly used to implement physical layer functions, resource scheduling and management, terminal access control, and mobility management. The access network device may be a device that supports wired access or a device that supports wireless access. Exemplarily, the access network device may be an access network (AN) / radio access network (RAN), which is composed of multiple 5G-AN / 5G-RAN nodes. 5G-AN / 5G-RAN nodes may be: access point (AP), base station (nodeB, NB), enhanced base station (enhance nodeB, eNB), next generation base station (NR nodeB, gNB), transmission reception point (TRP), transmission point (TP) or some other access node.

[0195] The access network device 10 in the embodiment of the present application can configure direct communication interface resources for the terminal 20, and notify the terminal 20 to enter the RRC-inactive state, or notify the terminal 20 to enter the RRC-activated state and adopt a power saving mode.

[0196] The AMF network element mainly accesses the NAS signaling (including session management (SM) signaling) of the terminal through the N1 interface and the signaling of the RAN through the N2 interface to complete the user registration process and the forwarding of SM signaling and mobility management.

[0197] SMF network element is used to implement session-related processes such as establishment, release, and update.

[0198] The PCF network element is responsible for user policy management, including both mobility-related policies and PDU session-related policies, such as QoS policies and charging policies.

[0199] UDM network element, used to store user subscription data.

[0200] The AUSF network element is used to implement authentication and authorization service functions and is responsible for authenticating and authorizing terminal access.

[0201] DN, the destination accessed by the terminal's PDU session.

[0202] NEF network element is used to support secure interaction between 3GPP network and third-party applications. NEF network element can safely expose network capabilities and events to third parties to enhance or improve application service quality. 3GPP network can also securely obtain relevant data from third parties to enhance intelligent decision-making of the network. At the same time, the network element supports the recovery of structured data from a unified database or the storage of structured data in a unified database.

[0203] The AF network element is used to interact with the 3GPP core network to provide services, such as influencing data routing decisions, policy control functions, or providing some third-party services to the network side.

[0204] NRF network element is used to maintain real-time information of all network function services in the network. NRF network element stores information of deployed network function (NF) components, such as the identification and network address of NF components, the identification of supported network slices, or information of data plane instances, etc. NRF network element provides services such as registration and discovery of NF components to other NFs.

[0205] Data network (DN) refers to the operator network that provides data transmission services to terminals, such as IP Multimedia Service (IMS) and Internet.

[0206] In the embodiment of the present application, the terminal can obtain direct communication interface resources through a network scheduling mode or a terminal autonomous selection mode to send data to other terminals on the PC5 interface communication link.

[0207] The so-called network scheduling mode, also referred to as mode 1, means that the terminal requests the access network device to configure direct communication interface resources for the terminal to send data to other terminals on the direct communication interface (eg, PC5 interface).

[0208] The so-called terminal autonomous selection mode, which may also be referred to as mode 2, means that the terminal selects a direct communication interface resource from a pre-configured resource pool to send data to other terminals on the direct communication interface.

[0209] In the embodiment of the present application, the data sent by the terminal to other terminals on the direct communication interface may refer to: control information (such as control information on the PC5 interface, control signaling, etc.) or V2X application layer messages (such as Intelligent Transport Systems (ITS) or Wireless Access in Vehicular Environments (WAVE) messages).

[0210] like Figure 3 As shown, Figure 3 The structure of the terminal and access network device in the embodiment of the present application can be referred to in Figure 3 The communication device includes a processor 31, a communication line 34 and at least one communication interface ( Figure 3 The description is merely illustrative and takes the transceiver 33 as an example).

[0211] Optionally, the communication device may further include a memory 32 .

[0212] The processor 31 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.

[0213] The communication link 34 may include a pathway for transmitting information between the above-mentioned components.

[0214] The transceiver 33 is used for information exchange with other devices, for example, using any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.

[0215] The memory 32 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory may be independent and connected to the processor via a communication line 34. The memory may also be integrated with the processor.

[0216] The memory 32 is used to store computer-executable instructions for executing the solution of the present application, and the execution is controlled by the processor 31. The processor 31 is used to execute the computer-executable instructions stored in the memory 32, thereby realizing a communication method provided in the following embodiment of the present application.

[0217] Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.

[0218] In a specific implementation, as an embodiment, the processor 31 may include one or more CPUs, such as Figure 3 CPU0 and CPU1 in.

[0219] In a specific implementation, as an embodiment, the communication device may include multiple processors, such as Figure 3 31 and processor 35 in the embodiment of the present invention. Each of these processors can be a single-CPU processor or a multi-CPU processor. The processor here can refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

[0220] In the embodiments of the present application, the specific structure of the execution subject of a communication method is not particularly limited in the embodiments of the present application, as long as the program recording the code of the communication method of the embodiments of the present application can be run to communicate according to the communication method of the embodiments of the present application. The following embodiments are described by taking the execution subject of a communication method as a terminal and an access network device as an example.

[0221] It should be pointed out that the various embodiments of the present application can refer to each other, for example, the same or similar steps or similar nouns, method embodiments, device embodiments or system embodiments can refer to each other without limitation.

[0222] like Figure 4 As shown, Figure 4 An interactive embodiment of a communication method provided in an embodiment of the present application, the method comprising:

[0223] Step 401: The access network device sends resource information to the terminal.

[0224] Correspondingly, the terminal receives resource information from the access network device.

[0225] The resource information may be used to represent the direct communication interface resources, or the resource information may be used to represent the direct communication interface resources used to transmit the data of the first application.

[0226] In a possible embodiment, the above data is data of a first application of the terminal, and the direct communication interface resource is used to transmit the data of the first application.

[0227] In the embodiment of the present application, the access network device can actively configure the above-mentioned direct communication interface resources for the terminal. Of course, the access network device can also configure the above-mentioned direct communication interface resources for the terminal at the request of the terminal. The direct communication interface resource can be configured by the access network device for the terminal specifically for transmitting the data of the first application. In this case, the direct communication interface resource can be called a dedicated resource of the first application, that is, the direct communication interface resource is only used to transmit the data of the first application. Of course, the direct communication interface resource can also be shared by the data of the first application and the data of other applications, that is, the direct communication interface resource is a shared resource, that is, the terminal can not only transmit the data of the first application but also the data of other applications on the direct communication interface resource.

[0228] Exemplarily, the above-mentioned direct communication interface resources allocated by the access network device to the terminal in the embodiment of the present application are wireless resources used to send data on the direct communication interface, such as specific time slots and specific frequency resources.

[0229] For example, the direct communication interface resources may be periodic resources configured by the access network device for the terminal in a semi-static manner.

[0230] Exemplarily, the direct communication interface resource may be a semi-persistent scheduling (Semi-Persistent Scheduling, SPS) resource allocated by the access network device to the terminal on the direct communication interface. The semi-persistently scheduled direct communication interface resource allocated by the access network device to the terminal enables the terminal to periodically use the direct communication interface resource to send data on the direct communication interface. There is no need to send a request to the access network device before each communication to obtain the direct communication interface resource.

[0231] It can be understood that the above-mentioned direct communication interface resources in the embodiment of the present application can be configured for the terminal by the access network device in a dynamic configuration mode or a semi-static configuration mode, or the direct communication interface resources can be configured for the terminal by the access network device before. When the terminal needs to use the direct communication interface resources to transmit data, the access network device can activate the direct communication interface resources through the downlink control channel (physical downlink control channel, PDCCH) control signaling, so that the terminal can determine that the activated direct communication interface resources can be used to transmit data. The dynamic configuration mode means that each time the terminal sends data, it needs to request and obtain the corresponding direct communication interface resources from the access network device, and the terminal sends data on the corresponding direct communication interface resources. When the terminal has new data to send, the terminal needs to request the direct communication interface resources from the access network device again. Semi-static configuration means that after the terminal requests the direct communication interface resources from the access network device, the access network device authorizes the terminal to use a certain resource periodically, for example, at an interval of 100 milliseconds. The terminal only needs to use the authorized direct communication interface resources to send data periodically, and does not need to request the direct communication interface resources from the access network device every time.

[0232] The above data in the embodiment of the present application can be transmitted on the direct communication interface resources obtained by the terminal through the network scheduling mode. Of course, the data in the embodiment of the present application can also be transmitted on the direct communication interface resources obtained by the terminal through the terminal autonomous selection mode, but the power consumption of the terminal transmitting data using the direct communication interface resources obtained by the terminal autonomous selection mode is higher than the power consumption of the terminal transmitting data on the direct communication interface resources obtained in the network scheduling mode.

[0233] The above-mentioned direct communication interface resource in the embodiment of the present application can be configured by the access network device for the terminal when the terminal and the access network device maintain the RRC-activated state on the Uu interface. In this way, when the terminal enters the RRC-inactivated state from the RRC-activated state or the terminal adopts the power saving mode in the RRC-activated state, the terminal can still use the direct communication interface resource to transmit the data of the first application.

[0234] For example, the access network equipment can be Figure 1The access network device 10 in the example, the terminal may be Figure 1 Terminal 20 in.

[0235] Step 402: The terminal transmits data via the direct communication interface resources.

[0236] In one example, the terminal is in a radio resource control RRC-inactive state. Or in another example, the terminal is in an RRC-activated state and the terminal adopts a power saving mode. In other words, when the terminal is in an RRC-activated state and adopts a power saving mode, the terminal can still transmit data through direct communication interface resources.

[0237] For example, the terminal may use a long discontinuous reception (DRX) technology on the direct communication interface to put the terminal in a power saving mode.

[0238] On the one hand, in the embodiment of the present application, the direct communication interface resources can only be used when the terminal is in the radio resource control RRC-inactive state, or when the terminal is in the RRC-activated state and uses the power saving mode. In other words, the direct communication interface resources are specially configured for the terminal and are used for transmitting data when the terminal is in the radio resource control RRC-inactive state, or when the terminal is in the RRC-activated state and the terminal uses the power saving mode to transmit data.

[0239] On the other hand, the direct communication interface resource can transmit data not only when the terminal is in the radio resource control RRC-inactive state, or when the terminal is in the RRC-activated state and the terminal adopts the power saving mode, but also when the terminal is in the RRC-activated state. For example, when the terminal is in the RRC-activated state, regardless of whether the terminal adopts the power saving mode, the terminal can use the direct communication interface resource to transmit data that needs to be transmitted on the direct communication interface.

[0240] In a possible implementation manner, step 402 in the embodiment of the present application may be implemented in the following manner: the terminal transmits data to other terminals using direct communication interface resources on the PC5 interface communication link between the terminal and other terminals.

[0241] In the embodiment of the present application, if the terminal maintains a Uu interface connection with the access network device or the terminal maintains an RRC connection with the access network device, the terminal is in an RRC-activated state. When the terminal is in an RRC-activated state, the access network device can configure direct communication interface resources for the terminal. If the terminal does not maintain a Uu interface connection with the access network device or the RRC connection between the terminal and the access network device is released, the terminal is in an RRC-inactivated state. This is explained uniformly here and will not be repeated later. The power consumption generated by the power saving mode when the terminal is in the RRC-activated state is lower than the power consumption generated by not using the power saving mode when the terminal is in the RRC-activated state.

[0242] It can be understood that in the embodiments of the present application, the terminal can enter the RRC-inactivated state from the RRC-activated state under the configuration of the access network device, or the terminal can enter the power saving mode of the RRC-activated state from the normal mode (for example, non-power saving mode) of the RRC-activated state under the configuration of the access network device. The embodiments of the present application are not limited to this.

[0243] An embodiment of the present application provides a communication method, in which a terminal receives resource information from an access network device. Since the resource information is used to characterize direct communication interface resources, data can be transmitted on the direct communication interface resources when the terminal is in a radio resource control RRC-inactive state, or when the terminal is in an RRC-activated state and the terminal adopts a power saving mode. In this way, for a terminal in an RRC-inactive state, it is possible to avoid power consumption caused by the terminal autonomously selecting a resource mode to obtain direct communication interface resources in order to transmit data. For a terminal in an RRC-activated state and in a power saving mode, the power consumption generated when transmitting data on a direct communication interface resource can still be lower than the power consumption generated by a terminal in an RRC-activated state that does not adopt a power saving mode. Therefore, the method provided in an embodiment of the present application can reduce the power consumption of a terminal in transmitting data on a direct communication interface.

[0244] In a possible embodiment, the above method may further include, before step 401: the access management network element sends the preferred scheduling mode of the terminal to the access network device.

[0245] Correspondingly, the access network device receives the preferred scheduling mode of the terminal from the access management network element.

[0246] As an example, the access management network element may determine the preferred scheduling mode of the terminal from the contract information of the terminal, or the access management network element may determine the preferred scheduling mode of the terminal based on the request of the terminal. Or the access management network element may autonomously determine the preferred scheduling mode of the terminal on the direct communication interface. It can be understood that the preferred scheduling mode of the terminal in the embodiment of the present application may refer to the preferred scheduling mode of the terminal on the direct communication interface.

[0247] As an example, the preferred scheduling mode of the terminal may be a network scheduling mode.

[0248] Based on this, the access network device sends resource information to the terminal, including: the access network device sends the resource information to the terminal according to the preferred scheduling mode of the terminal.

[0249] As a specific implementation, the access network device sends resource information to the terminal according to the preferred scheduling mode of the terminal, including: the access network device allocates direct communication interface resources to the terminal in a scheduling mode indicated by the priority scheduling mode, and then the access network device sends resource information used to characterize the direct communication interface resources to the terminal.

[0250] As an optional example, the preferred scheduling mode is the preferred scheduling mode corresponding to the first application, in other words, the preferred scheduling mode is the preferred scheduling mode of the first application of the terminal on the direct communication interface. It should be understood that for the same terminal, different applications may have different corresponding preferred scheduling modes on the direct communication interface.

[0251] In a possible embodiment, the above method may further include before step 402: within a preset time, if there is no data transmission on the Uu interface between the terminal and the access network device, the access network device sends a first notification message to the terminal, and accordingly, the terminal receives the first notification message from the access network device.

[0252] The first notification message is used to configure the terminal to enter the RRC-inactive state. This facilitates the terminal to release the RRC connection between the terminal and the access network device according to the first notification message, so as to enter the RRC-inactive state from the RRC-activated state. However, when the terminal is in the RRC-inactive state, the terminal can maintain a connection with the core network, that is, the terminal is still in the CM-Connected state (Connection Management).

[0253] It can be understood that when the terminal receives the second notification message, the terminal is in an RRC-activated state. In other words, there is an RRC connection between the terminal and the access network device, and the configured DRX parameters enable the terminal to achieve the effect of saving power.

[0254] In a possible embodiment, the above method may also include before step 402: within a preset time, if there is no data transmission on the Uu interface between the terminal and the access network device, the access network device sends a second notification message to the terminal, and accordingly, the terminal receives the second notification message from the access network device.

[0255] The second notification message is used to instruct the terminal to use the power saving mode in the RRC-activated state (or the terminal and the access network device are connected on the Uu interface). In this way, after receiving the second notification message, the terminal can use the power saving mode in the RRC-activated state.

[0256] In a possible embodiment, the method may further include, before step 402: the terminal determines that the terminal can use the direct communication interface resources based on the network scheduling mode configured for the terminal by the access network device to transmit data.

[0257] In one example, the terminal may determine, based on predefined or preconfigured information, that the terminal can use the direct communication interface resources based on the network scheduling mode configured for the terminal by the access network device to transmit data.

[0258] In another example, the terminal may determine, based on an instruction from an access management network element or an access network device, that the terminal can use the direct communication interface resources based on the network scheduling mode configured for the terminal by the access network device to transmit data.

[0259] As a specific implementation: the terminal may determine that the terminal can use the direct communication interface resources based on the network scheduling mode configured for the terminal by the access network device to transmit the data of the first application when the terminal is in the RRC-inactive state.

[0260] As another specific implementation: the terminal may determine that the terminal can use the direct communication interface resources based on the network scheduling mode configured for the terminal by the access network device to transmit the data of the first application when the terminal is in the RRC-activated state and in the power saving mode.

[0261] Figure 5 Another embodiment of the present application is shown, which includes: steps 501 to 512, wherein step 507 can refer to the above step 401 and will not be repeated here, and step 509 is a possible implementation method of the above step 402.

[0262] Among them, steps 501 to 506, step 508, step 510, step 511, and step 512 are optional steps.

[0263] Step 501: A terminal sends an identifier of at least one service to an access management network element.

[0264] Correspondingly, the access management network element receives an identifier of at least one service from the terminal.

[0265] Among them, the identifier of at least one service is a service requested by the terminal. The at least one service may be a service transmitted through a direct communication interface, for example, a V2X service. Accordingly, at least one service is used to indicate a service requested by the terminal to be transmitted through a direct communication interface, and at least one service includes a first application.

[0266] As a possible example, the direct communication interface may be a PC5 interface.

[0267] It can be understood that the data of at least one service in the embodiment of the present application can be transmitted on the direct communication interface resources obtained by the terminal in the network scheduling mode. In other words, the data of at least one service can also be transmitted on the direct communication interface resources configured by the access network device for the terminal based on the network scheduling mode. The at least one service is a service for which the terminal requests to transmit data.

[0268] As a possible implementation, step 501 in the embodiment of the present application can be implemented in the following manner: the terminal sends a first message to the access management network element, and accordingly, the access management network element receives the first message from the terminal. The first message carries an identifier of at least one service. For example, the first message can be a packet data unit (PDU) session connection establishment (PDU Session Establishment) message or a service request (service request) message.

[0269] Exemplarily, the access management network element may be an AMF network element.

[0270] As an example, the first message may also carry indication information for indicating that the at least one service is a service requested by the terminal.

[0271] Step 502: The access management network element sends the identifier of the terminal's allowed services to the terminal.

[0272] Correspondingly, the terminal receives the identifier of the allowed service of the terminal from the access management network element.

[0273] The allowed service is a service for which the terminal is authorized by the access management network element to transmit data on the direct communication interface. The allowed service includes the first application. In other words, the first application belongs to the allowed service of the terminal.

[0274] Specifically, step 502 can be implemented in the following manner: the access management network element obtains the contract information of the terminal. The access management network element sends the identifier of the permitted service of the terminal to the terminal according to the contract information.

[0275] As an example, the access management network element sends the identifier of the terminal's allowed service to the terminal according to the contract information, including: the access management network element obtains the identifier of the terminal's allowed service from the terminal's contract information. The access management network element sends the identifier of the terminal's allowed service to the terminal.

[0276] In a possible implementation manner, the method provided in the embodiment of the present application may further include, before step 502: the access management network element determines an identifier of an allowed service of the terminal.

[0277] As a possible implementation method, the access management network element may determine the identifier of the allowed service by the following method: the access management network element obtains the identifier of the allowed service of the terminal from the contract information of the terminal. For example, the access management network element may obtain the contract information of the terminal from the UDR network element or the UDM network element, and the contract information includes the identifier of the allowed service of the terminal.

[0278] As another possible implementation manner, the access management network element may determine the allowed services in the following manner: the access management network element determines the allowed services of the terminal from at least one service.

[0279] It should be understood that the allowed services of the terminal in the embodiment of the present application may be all or part of the at least one service. For example, at least one service is service 1, service 2, and service 3, and the allowed services may be service 1 and service 2. Therefore, the first application may be one or more of service 1 and service 2.

[0280] The first application in the embodiment of the present application may represent all the services in the allowed services, or may represent part of the services in the allowed services, for example, one service, which is not limited in the embodiment of the present application.

[0281] As an example, the data of the allowed service in the embodiment of the present application can be transmitted on the direct communication interface resources obtained by the terminal in the network scheduling mode. Of course, the data of the allowed service can be transmitted on the direct communication interface resources obtained by the terminal in the terminal autonomous selection mode.

[0282] It should be noted that the access management network element in the embodiment of the present application can actively send the identifier of the allowed service to the terminal, and step 501 can be omitted, that is, step 501 is an optional step. For example, when the terminal indicates to the access management network element in the registration procedure that the terminal has the ability to transmit the data of the PC5 service on the PC5 interface, the access management network element can send the identifier of the allowed service to the terminal. The data of the PC5 service includes the data of the allowed service.

[0283] Of course, in the embodiment of the present application, the access management network element may also decide whether to send the identifier of the allowed service to the terminal at the request of the terminal. In this case, step 501 needs to be included before step 502. Specifically, if the access management network element allows the terminal to use the direct communication interface resources obtained by the network scheduling mode to transmit the data of the allowed service, the access management network element sends the identifier of the allowed service to the terminal. If the access management network element does not allow the terminal to use the direct communication interface resources obtained by the network scheduling mode to transmit the data of the allowed service, the access management network element does not send the identifier of the allowed service to the terminal.

[0284] It can be understood that the identifier of the allowed service sent by the access management network element to the terminal is the identifier of the service for which the access management network element allows the terminal to use the direct communication interface resources obtained in the network scheduling mode to transmit data. The identifier of the allowed service sent by the access management network element to the terminal may be the identifier of all services or the identifier of part of the services in the identifier of at least one service requested by the terminal, and the embodiments of the present application are not limited to this. In other words, the terminal requests to use the network scheduling mode to transmit the data of service 1 and the data of service 2. The access management network element may allow the terminal to use the network scheduling mode to transmit the data of service 1 and the data of service 2. At this time, the access management network element sends the identifier of the service and the identifier of service 2 to the terminal as the identifier of the allowed service. Of course, if the access management network element allows the terminal to use the network scheduling mode to transmit the data of service 1, the access management network element sends the identifier of service 1 to the terminal as the identifier of the allowed service.

[0285] As a possible implementation, the identifier of the allowed service can be determined by the access management network element according to the contract information of the terminal and the identifier of at least one service from the terminal, or can be determined by the access management network element according to the contract information of the terminal and the capability of the terminal. For example, the identifier of the allowed service is the intersection of the identifier of the service in the contract information and the identifier of at least one service.

[0286] As a possible implementation, step 502 in the embodiment of the present application can be implemented in the following manner: the access management network element sends a sixth message to the terminal. Correspondingly, the terminal receives the sixth message from the access management network element. The sixth message includes an identifier of the allowed service. The sixth message is used to indicate that the terminal is allowed to use the direct communication interface resources obtained by the network scheduling mode to transmit the data of the allowed service. Of course, the sixth message can also carry indication information x, which is used to indicate that the terminal is allowed to use the direct communication interface resources obtained by the network scheduling mode to transmit the data of the allowed service. For example, the sixth message can be a service acceptance message.

[0287] Step 503: The terminal sends a first message to the access management network element.

[0288] Correspondingly, the access management network element receives the first message from the terminal.

[0289] The first message includes a first parameter, and the first parameter is used to represent that the terminal requests to use the network scheduling mode to transmit data on the direct communication interface, or the first parameter is used to represent that the terminal requests to use the network scheduling mode to transmit data of at least one service on the direct communication interface. The access management network element determines whether the terminal can use the direct communication interface resources obtained by the network scheduling mode to transmit data on the direct communication interface based on the first parameter and the contract information of the terminal.

[0290] It is understandable that the contract information of the terminal includes not only the identifier of the allowed services of the terminal but also the information indicating whether the terminal is allowed to use the direct communication interface resources obtained by the network scheduling mode to transmit data.

[0291] If the terminal's contract information indicates that the terminal is allowed to use the direct communication interface resources obtained by the network scheduling mode on the direct communication interface to transmit data, the access management network element sends authorization information to the terminal, which is used to indicate that the terminal is allowed to use the direct communication interface resources obtained by the network scheduling mode on the direct communication interface to transmit data.

[0292] If the contract information of the terminal indicates that the terminal is not allowed to use the direct communication interface resources obtained by the network scheduling mode to transmit data on the direct communication interface, the access management network element does not send authorization information to the terminal. Alternatively, the access management network element sends prohibition indication information to the terminal, which is used to indicate that the terminal is prohibited from using the direct communication interface resources obtained by the network scheduling mode to transmit data on the direct communication interface. If the terminal does not receive the authorization information, or the terminal receives the prohibition indication information, the terminal will not subsequently transmit data on the direct communication interface using the direct communication interface resources obtained by the network scheduling mode.

[0293] It should be understood that, on the one hand, the data in "the terminal requests to use the network scheduling mode on the direct communication interface to transmit data" may refer to "general data", that is, the data may be not only the data of the PC5 service, but also the data other than the PC5 service. On the other hand, the data in "the terminal requests to use the network scheduling mode on the direct communication interface to transmit data" may refer to "specific data". For example, the specific data may be the data of the PC5 service. At the same time, the specific data may also be the data of other services, such as direct communication used to send text messages, audio or video data, and the data may belong to the data of the allowed services, which is not limited in the embodiments of the present application.

[0294] It can be understood that if the data in "the terminal requests to use the network scheduling mode to transmit data on the PC5 interface" can refer to "specific data", then if the terminal does not receive the authorization information, or the terminal receives the prohibition indication information, the terminal will not subsequently use the direct communication interface resources obtained by the network scheduling mode to transmit the "specific data" on the direct communication interface, but the terminal can use the direct communication interface resources obtained by the network scheduling mode to transmit data other than the "specific data" on the direct communication interface.

[0295] Exemplarily, the first message may be a service request message. In a possible implementation, the identifier of at least one service is carried in the first message. It should be understood that if the first parameter and the identifier of at least one service can be carried in the same message, the first message can be used to indicate that the terminal requests to use the network scheduling mode to transmit data of at least one service on the direct communication interface. If the first parameter and the identifier of at least one service are carried in different messages, on the one hand, step 503 may be located before step 501, that is, the terminal requests the access management network element to use the network scheduling mode to transmit data on the direct communication interface, and when the access management network element allows the access management network element to use the network scheduling mode to transmit data on the direct communication interface, the terminal sends the identifier of at least one service to the access management network element. On the other hand, step 503 may be located after step 501, that is, the terminal first sends the identifier of at least one service to the access management network element, and when the identifier of the authorized service authorized by the access management network element is obtained, the terminal requests the access management network element to use the network scheduling mode to transmit data on the direct communication interface.

[0296] In a possible implementation, the first message also includes a first link identifier. The first link identifier indicates a communication link used for the terminal to transmit data on a direct communication interface, or the first link identifier indicates a communication link used for the terminal to transmit data of a first application on a direct communication interface. For example, the first link identifier may be a source address and a destination address. Among them, the source address is the layer 2 address of the terminal, and the destination address is the layer 2 address of the receiver that receives the data of the first application (for example, the layer 2 address of the other terminal described above). The access management network element manages the first link (for example, the communication link for the terminal to transmit data on the direct communication interface) with the first link identifier. Exemplarily, the access management network element may use the first link identifier to instruct the terminal to stop sending data on the first link, or instruct the access network device to stop allocating direct communication interface resources for the first link, or the access management network element indicates that the direct communication interface resources configured by the access network device for the terminal are for the first link, and the terminal may transmit data for the first link on the direct communication interface resources configured by the access network device for the terminal.

[0297] Step 504: The terminal sends a second message to the access management network element.

[0298] Correspondingly, the access management network element receives the second message from the terminal.

[0299] The second message includes a first quality of service parameter, where the first quality of service parameter is a quality of service parameter used by the terminal to request data transmission on the direct communication interface.

[0300] It can be understood that the second message may include indication information y, where the indication information y is used to indicate the quality of service parameter used by the terminal to request data transmission on the direct communication interface.

[0301] It can be understood that the first quality of service parameter is a quality of service parameter of the direct communication interface that has not been authorized by the network side.

[0302] It is understandable that the second message and the first message may be the same message. Specifically, if the first quality of service parameter is sent to the access management network element after the terminal obtains the identifier of the allowed service, the first quality of service parameter is the quality of service parameter used by the terminal to request the transmission of data of the allowed service on the direct communication interface. For example, the second message may be a PDU session establishment request message, or a PDU session modification request message.

[0303] Through step 504, the access management network element can send authorized service quality parameters to the terminal, and the authorized service quality parameters are authorized by the policy control network element. In addition, through step 504, the access management network element can also send indication information to the terminal or the access network device, which is used to indicate that the resource allocation mode of the direct communication interface resources for transmitting the data of the first application is the network scheduling mode. In addition, through step 504, the access management network element can also send indication information to the access network device, and the indication information is used to indicate to the access network device that when the terminal is in the RRC-inactive state, or the RRC-activated state and in the power saving mode, the terminal is allowed to continue to use the direct communication interface resources obtained in the network scheduling mode to transmit data on the direct communication interface.

[0304] Step 505: The access management network element sends a third message to the terminal.

[0305] Correspondingly, the terminal receives the third message from the access management network element.

[0306] The third message includes an authorized quality of service parameter, which is used by the terminal to transmit data on the direct communication interface, or the authorized quality of service parameter is a quality of service parameter authorized by the network side for the terminal to transmit data on the direct communication interface.

[0307] For example, the access management network element determines the authorized service quality parameter according to the first service quality parameter requested by the terminal and the subscription data of the terminal. For example, the authorized service quality parameter may be the first service quality parameter.

[0308] The quality of service parameters involved in the embodiments of the present application include resource type (resource Type), for example, the resource type can be: guaranteed bit rate (GBR), delay critical GBR or non-guaranteed bit rate (Non-GBR); priority level; packet delay budget; packet error rate; averaging window, for GBR resource type and delay-critical GBR resource type; maximum data burst volume, for delay-critical GBR resource type; PC5 QoS flow rate (PC5 Flow Bit Rates); PC5 link aggregation rate (PC5 Link Aggregated Bit Rates); range; resource allocation mode (resource allocation mode).

[0309] Step 506: The terminal sends a message for requesting direct communication interface resources to the access network device. Correspondingly, the access network device receives the message for requesting direct communication interface resources from the terminal.

[0310] Specifically, the terminal requests the direct communication interface resource corresponding to the first application from the access network device. At this time, the direct communication interface resource configured by the access network device for the terminal is for the first application. Accordingly, the message for requesting the direct communication interface resource carries the identifier of the first application.

[0311] As an example, step 506 in the embodiment of the present application can be specifically implemented in the following manner: the terminal sends a first request message to the access network device, and accordingly, the access network device receives the first request message from the terminal. The first request message is used to request direct communication interface resources. Exemplarily, when the terminal is in the RRC-activated state, the terminal sends a first request message to the access network device. It can be understood that if the first request message also carries the first link identifier, the direct communication interface resources requested by the terminal to the access network device are also associated with the first link identifier, which means that the direct communication interface resources are used to transmit data for the first link.

[0312] In a possible implementation, the method provided in the embodiment of the present application may further include, before step 506: the terminal determines that when the terminal is in an RRC-inactive state, it can use the direct communication interface resources configured by the access network device for the terminal to transmit data on the direct communication interface, or the terminal determines that when the terminal is in an RRC-activated state and in a power saving mode, the terminal can use the direct communication interface resources configured by the access network device for the terminal to transmit data on the direct communication interface. The so-called terminal being able to use the direct communication interface resources configured by the access network device for the terminal to transmit data on the direct communication interface is equivalent to the terminal determining that it can use the network scheduling mode to transmit data on the direct communication interface.

[0313] It can be understood that in the embodiment of the present application, when the terminal determines that when the terminal is in an RRC-inactive state, or the terminal is in an RRC-activated state and in a power saving mode, the terminal can use the direct communication interface resources configured by the access network device for the terminal to transmit data, the terminal then requests the direct communication interface resources from the access network device. This can avoid the situation where the terminal is in an RRC-inactive state, or the terminal is in an RRC-activated state and in a power saving mode, but the terminal cannot use the direct communication interface resources configured by the access network device for the terminal to transmit data on the direct communication interface, and the waste of resources caused by blindly applying for resources.

[0314] In one example, the access network device indicates in an implicit manner that when the terminal is in an RRC-inactive state, the terminal can use the direct communication interface resources configured by the access network device for the terminal to transmit data on the direct communication interface, or the access network device indicates in an implicit manner that when the terminal is in an RRC-activated state and in a power saving mode, the terminal can use the direct communication interface resources configured by the access network device for the terminal to transmit data on the direct communication interface. For example, the direct communication interface resources configured by the access network device for the terminal are resources at a specific location, and the resources at the specific location can be used to transmit data of the first application on the direct communication interface when the terminal is in an RRC-inactive state, or when the terminal is in an RRC-activated state and in a power saving mode, or to transmit data on the direct communication interface. In this way, if the terminal determines that the resources configured by the access network device for the terminal are resources at a specific location, it can use the direct communication interface resources configured by the access network device for the terminal to transmit data when the terminal is in an RRC-inactive state, or when the terminal is in an RRC-activated state and in a power saving mode.

[0315] In another example, the access network device explicitly indicates that when the terminal is in the RRC-inactive state, or the terminal is in the RRC-activated state and in the power saving mode, the terminal can use the direct communication interface resources configured by the access network device for the terminal to transmit data. For example, the access network device executes step 507. This facilitates the terminal to determine, according to the first indication information, that when the terminal is in the RRC-inactive state, or the terminal is in the RRC-activated state and in the power saving mode, the terminal can use the direct communication interface resources configured by the access network device for the terminal to transmit data.

[0316] Step 507: The access network device sends resource information to the terminal.

[0317] Correspondingly, the terminal receives resource information from the access network device.

[0318] For the description of step 507 , please refer to the description of step 401 , which will not be repeated here.

[0319] It should be noted that if the terminal also carries the first link identifier when requesting the access network device to configure a direct communication interface resource for the terminal, the direct communication interface resource configured by the access network device for the terminal may also be associated with the first link identifier. The so-called association of the direct communication interface resource with the first link identifier may indicate that the destination end of the data transmitted by the direct communication interface resource is the destination end of the communication link indicated by the first link identifier.

[0320] Step 508: The access network device or the access management network element sends first indication information to the terminal.

[0321] Correspondingly, the terminal receives the first indication information from the access network device or the access management network element.

[0322] The first indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit the data of the first application when the terminal is in the RRC-inactive state. Alternatively, the first indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit the data of the first application when the terminal is in the RRC-activated state and in the power saving mode.

[0323] Correspondingly, the terminal determines that when the terminal is in an RRC-inactive state, or the terminal is in an RRC-activated state and in a power saving mode, it can use direct communication interface resources based on a network scheduling mode on the direct communication interface to transmit data of the first application, including: the terminal determines according to the first indication information that when the terminal is in an RRC-inactive state, or the terminal is in an RRC-activated state and in a power saving mode, it can use direct communication interface resources based on a network scheduling mode on the direct communication interface to transmit data of the first application.

[0324] Correspondingly, when the terminal receives the first indication information, step 402 in the embodiment of the present application can be implemented in the following way: when the terminal is in an RRC-inactive state, or the terminal is in an RRC-activated state and in a power saving mode, the terminal transmits the data of the first application on the direct communication interface resources according to the first indication information, including: the terminal determines according to the first indication information that when the terminal is in an RRC-inactive state, or the terminal is in an RRC-activated state and in a power saving mode, the data of the first application is transmitted on the direct communication interface, and the terminal uses the direct communication interface resources to transmit the data of the first application.

[0325] In a possible embodiment, the method provided in the embodiment of the present application may also include: the terminal receives permission indication information from the access management network element, and the permission indication information is used to indicate that the terminal is allowed to transmit data on the direct communication interface. Through this permission indication information, subsequent terminals can be facilitated to transmit data on the direct communication interface.

[0326] In a possible embodiment, taking the data involved in the embodiment of the present application as the data of the first application and the direct communication interface as the PC5 interface as an example, the method provided in the embodiment of the present application may also include before step 508: the terminal generates a PC5 interface service quality flow (PC5 QoS Flow) corresponding to the first application. The PC5 interface service quality flow includes a PC5 interface packet filter. Among them, a parameter value in the PC5 interface packet filter is the identifier of the first application. The terminal associates the data of the first application with the PC5 interface service quality flow. Among them, the PC5 interface packet filter is used to determine the data of the first application.

[0327] As a specific implementation, the terminal determines the data of the first application according to the PC5 interface packet filter, including: the terminal obtains one or more data to be sent, the terminal compares the application identifier corresponding to the one or more data to be sent with the identifier of the first application in the PC5 interface packet filter, and if the application identifier corresponding to the target data in the one or more data to be sent is the same as the identifier of the first application, then the terminal determines that the target data is the data of the first application. The so-called terminal associating the data of the first application with the PC5 interface service quality flow can refer to: the terminal uses the PC5 interface service quality flow to transmit the data of the first application on the resources configured by the access network device for the terminal.

[0328] In a possible implementation, before the terminal generates the PC5 interface service quality flow corresponding to the first application, the mapping relationship between the first application and the PC5 interface service quality flow can be obtained by the following method 1 or method 2:

[0329] Method 1: The terminal receives a PC5 interface service quality flow or configuration information corresponding to a first application from a policy control network element. The configuration information is used to generate a PC5 interface service quality flow corresponding to the first application. The terminal generates a PC5 interface service quality flow corresponding to the first application according to the configuration information. The parameter of the PC5 interface service quality flow may be a PC5 interface service quality flow identifier (PFI, PC5 QoS Flow Identifier).

[0330] Exemplarily, the policy control network element may be a PCF network element, and the PC5 interface service quality flow or configuration information corresponding to the first application may be actively sent to the terminal by the policy control network element. Of course, the policy control network element may also send configuration information or the PC5 interface service quality flow corresponding to the first application to the terminal at the request of the terminal. In the embodiment of the present application, the priority of the PC5 interface service quality flow or configuration information corresponding to the first application from the policy control network element is higher than the priority of the PC5 interface service quality flow corresponding to the first application pre-configured at the terminal.

[0331] Mode 2: The terminal generates a PC5 interface service quality flow corresponding to the first application according to preconfigured parameters. The terminal configures the PC5 service quality parameters that can be used by the first application in advance in the SIM card or the built-in storage of the terminal. The terminal generates the corresponding PC5 interface service quality flow through the preset PC5 interface service quality parameters, and writes the identifier of the first application into the PC5 interface packet filter of the PC5 interface service quality flow.

[0332] Step 509: When the terminal is in the RRC-inactive state, or the terminal is in the RRC-activated state and in the power saving mode, the terminal transmits the data of the first application on the direct communication interface resources configured by the access network device for the terminal according to the first indication information.

[0333] When the data transmission of the first application is finished, in order to avoid wasting the direct communication interface resources configured by the access network device for the terminal based on the network scheduling mode, the access network device can promptly release the direct communication interface resources configured for the terminal for transmitting the data of the first application on the direct communication interface. Based on this, in a possible embodiment, Figure 5 As shown, the method provided in the embodiment of the present application may further include, after step 509:

[0334] Step 510: The terminal sends a fourth message to the access management network element.

[0335] Correspondingly, the access management network element receives the fourth message from the terminal.

[0336] The fourth message includes a second parameter, and the second parameter is used to indicate that the terminal stops transmitting data on the direct communication interface. Or the second parameter is used to indicate that the terminal has completed the transmission of data of the first application. Or the second parameter is used to indicate that the terminal wants to stop transmitting data on the direct communication interface. Or the second parameter is used to indicate that the terminal wants to stop transmitting data of the first application on the direct communication interface.

[0337] Exemplarily, the fourth message may be a service request message.

[0338] Step 511: The access management network element instructs the access network device to release the direct communication interface resources of the terminal according to the second parameter.

[0339] For example, the access management network element sends release indication information to the access network device, and the release indication information is used to instruct the access network device to release the direct communication interface resources of the terminal. Or the release indication information is used to instruct the terminal to stop using the direct communication interface resources to transmit the data of the first application on the direct communication interface, or the first indication information is used to indicate that the terminal has completed the transmission of the data of the first application.

[0340] Step 512: When the terminal stops transmitting data through the direct communication interface resources, the access network device releases the direct communication interface resources.

[0341] Specifically, step 512 can be implemented in the following manner: the access network device releases the above-mentioned direct communication interface resources according to the release indication information. Or step 512 can be replaced by the following manner: the terminal has completed the transmission of the data of the first application, or the access network device needs to release the direct communication interface resources configured for the terminal, then the access network device releases the above-mentioned direct communication interface resources. Specifically, the access network device receives indication information from the access management network element, and the indication information is used to indicate that the terminal has completed the transmission of the data of the first application. Specifically, the access network device needs to release the direct communication interface resources configured for the terminal, including: the access network device determines that the direct communication interface resources configured for the terminal need to be released according to the indication information from the access management network element.

[0342] As a possible implementation, in an embodiment of the present application, after the access network device releases the direct communication interface resources configured for the terminal, the access network device may also send a third notification message to the terminal, where the third notification message is used to indicate that the direct communication interface resources configured for the terminal are released, thereby facilitating the terminal to determine that the direct communication interface resources are released based on the third notification message.

[0343] In a possible implementation, the method provided in the embodiment of the present application may further include: the terminal sends a third parameter to the access management network element, and accordingly, the access management network element receives the third parameter from the terminal. The third parameter is used to characterize the terminal's request to use a network scheduling mode on the direct communication interface. The third parameter facilitates the access management network element to determine that the scheduling mode of resources for the terminal to transmit data on the direct communication interface is the network scheduling mode.

[0344] In a possible implementation, the method provided by the embodiment of the present application may further include: the terminal receives second indication information, the second indication information is used to indicate that the terminal is allowed to use the direct communication interface resources based on the network scheduling mode to transmit data when it is in the RRC-activated state and in the power saving mode. The terminal transmits data through the direct communication interface resources, including: the terminal transmits the above data through the direct communication interface resources according to the second indication information.

[0345] As an example, the terminal transmits the above data through direct communication interface resources according to the second indication information, including: the terminal determines according to the second indication information that the access management network element allows the terminal to use direct communication interface resources based on the network scheduling mode to transmit data when it is in RRC-activated state and adopts power saving mode, and then the terminal transmits the above data through the direct communication interface resources.

[0346] It is worth noting that if the second parameter is used to characterize that the terminal wishes to stop transmitting data on the direct communication interface or the second parameter is used to characterize that the terminal stops transmitting data on the direct communication interface, the access management network element can instruct the access network device to release all direct communication interface resources for the terminal. If the second parameter is used to characterize that the terminal wishes to stop transmitting data of a first application on the direct communication interface or the second parameter is used to characterize that the terminal stops transmitting data of a first application on the direct communication interface, the access management network element can instruct the access network device to release the direct communication interface resources configured for the first application, but other data transmission on the direct communication interface does not stop.

[0347] like Figure 6 As shown, Figure 6 Taking the terminal as UE, the access network device as (R) AN device, the access management network element as AMF network element, and the direct communication interface as PC5 interface as an example, a communication method provided in an embodiment of the present application is described in detail, and the method includes:

[0348] Step 601: The UE sends a registration request message to the AMF network element through the (R)AN device.

[0349] Correspondingly, the AMF network element receives the registration request message from the UE.

[0350] The registration request message may carry a first mode indicator. The registration request message is used to request the UE to be registered with the core network.

[0351] The first mode indication is used to indicate that the UE requests to transmit data of the PC5 service on the PC5 interface in a network scheduling mode, or the first mode indication is used to indicate that the UE has the ability to transmit data of the PC5 service on the PC5 interface.

[0352] For example, the PC5 service may be a VRU service, or may be other services that use the PC5 interface for communication, such as a service for direct communication between terminals.

[0353] Optionally, the registration request message may also carry the identifier of the UE.

[0354] After step 601, the UE may perform other steps in the registration process with other network elements in the core network.

[0355] Step 602: The AMF network element sends a registration request message to the UDM network element.

[0356] Correspondingly, the UDM network element receives the registration request message from the AMF network element.

[0357] Step 603: The UDM network element sends a registration response message to the AMF network element.

[0358] Correspondingly, the AMF network element receives the registration response message from the UDM network element.

[0359] The registration response message may carry the UE's contract information, wherein the UE's contract information includes one or more of the following information: first capability information, and authorization indication information. The first capability information indicates that the UE has the ability to transmit data of the PC5 service on the PC5 interface. The authorization indication information is used to indicate that the UE is allowed to use the direct communication interface resources obtained by the network scheduling mode on the PC5 interface to transmit data of the PC5 service.

[0360] Step 604: The AMF network element selects a PCF network element to provide services for the UE.

[0361] Step 605: The access and mobility policy (AM policy) association establishment / modification process is executed between the AMF network element and the PCF network element.

[0362] After step 605, the UE and other network elements in the core network execute other steps in the registration process.

[0363] Step 606: The AMF network element sends a registration accept message to the UE. Correspondingly, the UE receives the registration accept message from the AMF network element.

[0364] The registration acceptance message includes authorization indication information.

[0365] The UE can determine through the authorization indication information that the UE can use the direct communication interface resources obtained in the network scheduling mode on the PC5 interface to transmit data of the PC5 service.

[0366] Figure 6 The purpose of the illustrated embodiment is that the UE determines through a registration process that the UE can use the direct communication interface resources acquired in the network scheduling mode on the PC5 interface to transmit data of the PC5 service.

[0367] in, Figure 6 The registration request message in the illustrated embodiment may correspond to the first message in the above embodiment, and the first mode indication may correspond to the above first parameter or third parameter.

[0368] like Figure 7 As shown, Figure 7 Taking the terminal as UE, the access network device as (R)AN device, the access management network element as AMF network element, the PC5 service including at least one service, and the direct communication interface as PC5 interface as an example, a method for UE to transmit data of PC5 service in a low-power manner is described, and the method includes:

[0369] Step 701: UE enters a mode for transmitting data of PC5 service.

[0370] As a specific implementation, step 701 can be implemented in the following manner: the upper layer calls an AT command between the upper layer and the V2X layer to trigger the UE to enter a mode of transmitting data of the PC5 service. For example, the upper layer can be an application layer of the UE, and the upper layer and the V2X layer can be located inside the UE.

[0371] Step 702: The UE sends a service request message to the AMF network element through the (R)AN device.

[0372] Correspondingly, the AMF network element receives the service request message from the terminal through the (R)AN device.

[0373] The service request message carries a request for a PC5 service, an identifier of at least one service, and quality of service parameters (requested PC5 QoS parameters) 1 requested by the UE for data transmission on the PC5 interface, but does not carry a list of PDU Sessions.

[0374] The request for PC5 service is used to indicate that the UE requests to transmit data of PC5 service on PC5 interface. The service request message does not carry list of PDU Session to indicate that the purpose of the terminal sending the service request message is not because there is data to be sent on Uu.

[0375] For example, the requested PC5 QoS parameters may include one or more of the following parameters:

[0376] -PC5 5G QoS Identifier (PQI);

[0377] - Resource Type, for example, the resource type may be: guaranteed bit rate (GBR), delay critical guaranteed rate (delay critical GBR) or non-guaranteed bit rate (Non-GBR);

[0378] -priority level;

[0379] -Data delay (packet delay budget);

[0380] -Packet error rate;

[0381] - Averaging window for GBR resource type and delay-critical GBR resource type;

[0382] - Maximum Data Burst Volume, for delay-critical GBR resource types;

[0383] -PC5 QoS flow rate (PC5 Flow Bit Rates);

[0384] -PC5 Link Aggregated Bit Rates;

[0385] - range;

[0386] -Resource allocation mode.

[0387] It should be understood that the resource allocation mode included in the requested PC5 QoS parameters is the resource allocation mode requested by the terminal, for example, the resource allocation mode may be a network scheduling mode.

[0388] Step 703: The AMF network element sends an AM policy request message to the PCF network element.

[0389] Correspondingly, the PCF network element receives the AM policy request message from the AMF network element.

[0390] The AM policy request message carries at least one service identifier and requested PC5 QoS parameters1.

[0391] Step 704: The PCF network element sends an AM policy response message to the AMF network element.

[0392] Correspondingly, the AMF network element receives the AM policy response message from the PCF network element.

[0393] Among them, the AM policy response message carries the QoS parameters (authorized PC5 QoS parameters) 2 authorized by the PCF network element for the UE to use on the PC5 interface, the identifier of the allowed service, and the preferred scheduling mode (allocation mode). For example, the preferred scheduling mode can be the network scheduling mode, that is, mode 1 (mode 1). The network side authorizes the UE to use the direct communication interface resources obtained based on the network scheduling mode to transmit the data of the allowed service on the PC5 interface.

[0394] It is understandable that the preferred scheduling mode may also be a terminal autonomous selection mode, namely mode 2. The terminal transmits data of the permitted service on the PC5 interface through the autonomously selected direct communication interface resources.

[0395] The preferred scheduling mode indicates that the PC5 interface service quality flow corresponding to the allowed service needs to be transmitted in a low-power consumption manner.

[0396] The PC5 interface service quality flow includes a PC5 interface packet filter. A PC5 QoS Flow Identifier (PFI) value of a PC5 interface service quality flow in the PC5 interface packet filter is an identifier of the allowed service.

[0397] Among them, low-power data transmission methods include (but are not limited to) using the SPS resource allocation method on the PC5 interface (that is, the UE uses the SPS resources configured for the UE by the (R)AN device on the PC5 interface), or the terminal randomly selects direct communication interface resources in a specific resource pool to send data.

[0398] Step 705: The AMF network element sends an N2 (N2 request) message to the (R)AN device. Correspondingly, the (R)AN device receives the N2 message from the AMF network element.

[0399] The N2 message includes authorized PC5 QoS parameters 2, a preferred scheduling mode, an identifier of an allowed service, and a service accept message. The service accept message includes an identifier of an allowed service. The authorized PC5 QoS parameters 2 include an identifier of an allowed service and a preferred scheduling mode. For example, the preferred scheduling mode is a network scheduling mode. The identifier of the allowed service is an identifier of a service that authorizes the UE to transmit data on the PC5 interface. The allowed service belongs to all or part of at least one service. The authorized PC5 QoS parameters 2, the preferred scheduling mode, and the identifier of the allowed service can be carried in the context of the UE.

[0400] It should be understood that after the (R)AN device receives the authorized PC5 QoS parameters 2, it can allocate direct communication interface resources for the terminal for transmitting data of the allowed service according to the authorized PC5 QoS parameters 2. For example, the authorized PC5 QoS parameters 2 indicate that the guaranteed bandwidth of the terminal authorized by the AMF network element to transmit data of the allowed service is 5M, then the bandwidth of the direct communication interface resources allocated by the (R)AN device to the terminal for transmitting data of the allowed service is at least 5M, so as to ensure the reliable transmission of the data of the allowed service. Of course, when the (R)AN device allocates direct communication interface resources for transmitting data of the allowed service to the terminal, it not only needs to refer to the authorized PC5QoS parameters 2 but also can refer to the remaining resources at the (R)AN device or the direct communication interface resources required by other terminals, and the embodiments of the present application do not limit this.

[0401] Optionally, the AMF network element may also send a mode indication 1 (corresponding to the fourth indication information) to the (R)AN device, where the mode indication 1 is used to indicate that when there is no data between the (R)AN device and the UE on the air interface (for example, the Uu interface), the (R)AN device and the UE maintain a Uu interface connection (that is, an RRC connection is maintained between the (R)AN device and the UE), and the UE needs to use a power saving mode to maintain a Uu interface connection with the (R)AN device.

[0402] As a possible implementation method, the mode indication 1 (corresponding to the fourth indication information) is used to indicate that if there is no data transmission between the (R)AN device and the UE at the air interface within a preset time, the (R)AN device needs to maintain a Uu interface connection with the UE, and when the Uu interface connection is maintained between the (R)AN device and the UE, the UE needs to adopt a power saving mode. It can be understood that after exceeding the preset time, if there is still no data transmission between the (R)AN device and the UE at the air interface, the (R)AN device can release the Uu interface connection with the UE, that is, the (R)AN device releases the RRC connection with the UE, so that the UE is in an RRC-inactive state.

[0403] Step 706: The (R)AN device sends RRC connection reconfiguration information to the UE.

[0404] The RRC connection reconfiguration information includes the configuration of the sidelink radio bearer (SL RB) and the service acceptance message.

[0405] The service acceptance message includes the identifier of the permitted service and authorized PC5 QoS parameters2.

[0406] It is understandable that the configuration of the side link radio bearer (SL RB) is used to configure a radio bearer for the UE to transmit data of the allowed service on the PC5 interface. The RRC connection reconfiguration information can be actively sent to the UE by the (R)AN device, or the (R)AN device sends the RRC connection reconfiguration information to the UE based on the request of the UE. For example, if the (R)AN device obtains the N2 message from the AMF network element, it will actively send the RRC connection reconfiguration information to the UE.

[0407] The purpose of step 706 in the embodiment of the present application is that the UE receives the identifier of the allowed service and the authorized PC5 QoS parameters 2 from the AMF network element through the (R)AN device.

[0408] Step 707: The PCF network element updates the UE policy.

[0409] The policy may include an identifier of the allowed service and a PC5 interface service quality flow corresponding to the identifier of the allowed service.

[0410] The PC5 interface service quality flow may include a PC5 interface filter, which is used to determine data of allowed services. Specifically, the PC5 interface filter may include an identifier of the allowed services. For example, if the allowed services include application 1, the PC5 interface filter may include an identifier of application 1.

[0411] Step 708: The PCF network element sends the updated UE policy to the UE.

[0412] Correspondingly, the UE receives the updated UE policy from the PCF network element.

[0413] As an example, the PCF network element may actively send the updated UE policy to the UE. As another example, the PCF network element may send the updated UE policy to the UE based on the UE's request. For example, the PCF network element receives a UE policy update request message from the UE. The UE policy update request message is used to request the UE's policy. The PCF network element sends a UE policy update response message to the UE based on the UE policy update request message. The UE policy update response message includes the updated UE policy.

[0414] The following steps 709 to 711 take the example that the allowed services include application 1.

[0415] Step 709: The UE requests the (R)AN device for direct communication interface resources for transmitting data of application 1 on the PC5 interface.

[0416] In a possible implementation, step 709 may be replaced by the following method: the UE requests the (R)AN device for direct communication interface resources for transmitting the data of application 1 on the PC5 interface according to the identifier of application 1, the source layer 2 identifier, and the destination layer 2 identifier. The UE provides the (R)AN device with the source layer 2 identifier and the destination layer 2 identifier to facilitate the (R)AN device to determine the address of the sender of the data of application 1 and the address of the receiver of the data of application 1.

[0417] Step 710: The (R)AN device allocates SPS resources to the UE according to the preferred scheduling mode.

[0418] The SPS resource can be used to transmit data of application 1 on the PC5 interface. It can be understood that the SPS resource is a type of direct communication interface resource.

[0419] Step 711: The UE uses the above-mentioned SPS resources to send the data of application 1 on the PC5 interface according to the PC5 interface service quality flow.

[0420] As a possible implementation, step 711 in the embodiment of the present application can be implemented in the following manner: the UE determines the data of application 1 according to the PC5 interface packet filter, and then the UE uses the above-mentioned direct communication interface resources on the PC5 interface communication link to send the data of application 1. For example, the UE determines the data of application 1 according to the PC5 interface packet filter in the following manner: if the UE determines that the identifier of the application corresponding to the data to be sent is the same as the identifier of application 1 carried in the PC5 interface packet filter, then the UE determines that the data to be sent is the data of application 1.

[0421] If the other PC5 interface packet filters in the UE are inconsistent with the PC5 interface packet filters provided by the PCF network element for the UE, the priority of the PC5 interface packet filter provided by the PCF network element for the UE is higher than the priority of the other PC5 interface packet filters in the UE. In other words, the PC5 interface packet filter in step 711 can be other PC5 interface packet filters in the UE or the PC5 interface packet filter provided by the PCF network element for the UE. When the two are inconsistent, the PC5 interface packet filter in step 711 is the PC5 interface packet filter provided by the PCF network element for the UE.

[0422] It should be noted that when the UE uses the direct communication interface resources configured by the (R)AN device for the UE on the PC5 interface to send the data of application 1, the (R)AN device configures the UE to maintain the Uu interface connection when there is no data transmission on the air interface (e.g., Uu interface) according to mode indication 1. Specifically, the UE maintains the RRC-Connected state on the Uu interface and needs to use power-saving technologies, such as Long DRX. It can be understood that when the UE maintains the RRC-Connected state on the Uu interface and uses power-saving technologies, the (R)AN device can indicate to the UE that the UE can continue to use the above-mentioned resources configured by the (R)AN device for the UE to transmit the data of application 1.

[0423] The content measured by a terminal in the RRC connected state is more than that measured by a terminal in the idle state. In fact, a terminal in the RRC connected state consumes more power than a terminal in the idle state.

[0424] exist Figure 7In the illustrated embodiment, if there is no data transmission between the UE and the (R)AN device on the Uu interface, but the UE still needs to perform data transmission on the PC5 interface, in this case: although the UE can maintain the RRC connection with the (R)AN device, the UE needs to adopt the power saving mode. At this time, the UE can continue to use the direct communication interface resources configured by the (R)AN device for the UE to send data of the allowed services to reduce the power consumption of the UE. On the other hand, in this scheme, when data needs to be transmitted between the UE and the (R)AN device on the Uu interface later, the UE does not need to re-establish the RRC connection with the (R)AN device through the random access process to transmit data. And for downlink transmission, the (R)AN device can also omit the process of re-paging the terminal.

[0425] exist Figure 7 In the embodiment shown, the service request message (Service Request message) corresponds to the first message in the above embodiment. The identifier of application 1 corresponds to the identifier of the first application in the above embodiment. The quality of service parameters (requested PC5 QoS parameters) 1 requested by the terminal to transmit data on the PC5 interface correspond to the first quality of service parameters in the above embodiment. The source layer 2 identifier (source L2 ID) and the destination layer 2 identifier (destination L2 ID) correspond to the first link identifier. The authorized PC5 QoS parameters 2 correspond to the authorized quality of service parameters in the above embodiment. The following embodiments may refer to the description here whenever related names are involved.

[0426] exist Figure 7 The illustrated embodiment describes the process of the UE obtaining the authorized PC5 QoS parameters2 and the PC5 interface packet filter in the service request process, and when the UE needs to transmit the data of application 1 on the PC5 interface, when the UE does not have data transmission with the (R)AN device on the Uu interface, the UE maintains the RRC-Connected state with the (R)AN device on the Uu interface and adopts power-saving technology. At this time, the UE can continue to use the (R)AN device to transmit the data of application 1 on the PC5 interface for the direct communication interface resources configured for the UE based on the network scheduling mode.

[0427] refer to Figure 8 , Figure 8 Another communication method of the present application is provided. Figure 7The difference between the embodiments shown is that the UE obtains the authorized PC5 QoS parameters2 and the PC5 interface packet filter from the PCF network element in the packet data unit (PDU) session process. The method includes:

[0428] Step 801: The UE sends a PDU session establishment request message to the AMF network element.

[0429] Correspondingly, the AMF network element receives a PDU session establishment request message from the UE.

[0430] The PDU session establishment request message may include: a data network name (DNN), an indication of a PC5 service, an identifier of at least one service, and a quality of service parameter (requested PC5 QoS parameters) 1 requested by the UE for transmitting data on the PC5 interface. The quality of service parameter 1 includes an identifier of at least one service. The inclusion of at least one service identifier in the quality of service parameter 1 indicates that the quality of service parameter 1 is a quality of service parameter used when transmitting data of at least one service. The indication of the PC5 service is used to indicate that the UE has the ability to transmit the PC5 service on the PC5 interface.

[0431] Step 802: The AMF network element selects an SMF network element for the UE to establish the above-mentioned PDU session.

[0432] Step 803, the AMF network element triggers the PDU session establishment session management context request (Nsmf_PDUsession_CreateSMContext request) service operation to the SMF network element. Correspondingly, the SMF network element receives the Nsmf_PDU session_CreateSMContext request service operation from the AMF network element.

[0433] The Nsmf_PDU session_CreateSMContext request service includes an indication of the PC5 service, an identifier of at least one service and requested PC5 QoS parameters 1.

[0434] It can be understood that after step 803, the UE and other network elements in the core network continue to execute other processes in the PDU session establishment process.

[0435] Step 804: The SMF network element sends a session management policy association modification (SM PolicyAssociation Modification) request message to the PCF network element.

[0436] Correspondingly, the PCF network element receives the SM Policy Association Modification request message from the SMF network element.

[0437] The SM Policy Association Modification request message may carry at least one service identifier and requested PC5 QoS parameters 1.

[0438] Step 805: The PCF network element sends a session management policy connection modification (SM PolicyAssociation Modification) response message to the SMF network element.

[0439] Correspondingly, the SMF network element receives the SM Policy Association Modification response message from the PCF network element, wherein the SM Policy Association Modification response message may include: authorized PC5QoS parameters2.

[0440] Among them, authorized PC5 QoS parameters2 may include that the preferred scheduling mode corresponding to authorized PC5 QoSparameters2 is the network scheduling mode.

[0441] It can be understood that after step 805, the UE and other network elements in the core network continue to execute other processes in the PDU session establishment process.

[0442] Step 806: The SMF network element sends the N1 container and the N2 container to the AMF network element.

[0443] Correspondingly, the AMF network element receives the N1 container and the N2 container from the SMF network element.

[0444] The N1 container may include the identifier of the allowed service, authorized PC5 QoS parameters2, and a PC5 interface packet filter. The PC5 interface packet filter may include the identifier of the allowed service.

[0445] The N2 container may include authorized PC5 QoS parameters2 and an identifier of the allowed service.

[0446] The allowed service is an application in at least one service.

[0447] Step 807: The AMF network element sends the N2 container to the (R)AN device.

[0448] Step 808: The AMF network element sends the N1 container to the UE.

[0449] Correspondingly, the UE receives the N1 container from the AMF network element. This facilitates the UE to promptly learn the authorized PC5 QoS parameters2 and PC5 interface packet filter authorized by the PCF network element for the UE to transmit data of the permitted service on the PC5 interface.

[0450] exist Figure 8 In the illustrated embodiment, the UE can obtain the identifier of the allowed service authorized by the network side through the PDU session establishment process, and determine that the data of the allowed service can be transmitted using the direct communication interface resources obtained by the UE in the network scheduling mode. In addition, the UE can also obtain the authorized PC5 QoS parameters2 and the PC5 interface packet filter through the PDU session establishment process, so that the authorized PC5 QoS parameters2 and the PC5 interface packet filter can be directly used when the UE needs to transmit the data of the allowed service later.

[0451] It should be understood that Figure 8 The embodiment shown takes the PDU session establishment process as an example, and the above PDU session establishment process can also be replaced by a PDU session modification / update process. The above PDU session establishment request message can correspond to the first message. In addition, Figure 8 In the illustrated embodiment, the UE obtains the authorized PC5 QoS parameters2 during the PDU session establishment process.

[0452] refer to Fig. 9 Another communication method provided in an embodiment of the present application includes:

[0453] Step 901: The UE sends a service request message to the AMF network element through the (R)AN device. Correspondingly, the AMF network element receives the service request message from the UE through the (R)AN device.

[0454] The service request message includes an identifier of a PDU session, an identifier of at least one service, and a request for a PC5 service. The request for a PC5 service is used to indicate that the UE requests to transmit data of the PC5 service on a PC5 interface.

[0455] Step 902, the AMF network element triggers a PDU session update session management context request (Nsmf_PDUSession_Update SM context request) service operation to the SMF network element. Correspondingly, the SMF network element receives the PDU session update session management context request service from the AMF network element. The PDU session update session management context request service operation includes at least one service identifier and a PC5 service request.

[0456] Step 903, the SMF network element triggers the PDU session update session management context response (Nsmf_PDUSession_Update SM context response) service operation to the AMF network element, and accordingly, the AMF network element receives the service-based PDU session update session management context response service operation from the SMF network element.

[0457] The PDU session update session management context response service operation includes the identifier of the allowed service, authorized PC5 QoS parameters2, the preferred scheduling mode corresponding to the authorized PC5 QoS parameters2, and the second mode indication. The preferred scheduling mode corresponding to the authorized PC5 QoS parameters2 is the network scheduling mode. The allowed service can be a service among at least one service. The second mode indication is used to indicate that the (R)AN device can still use the direct communication interface resources obtained in the network scheduling mode to transmit the data of the PC5 service when the terminal is in the RRC-inactive state.

[0458] Fig. 9 The PDU session update session management context request service operation in may correspond to the above-mentioned first message.

[0459] Step 904: The AMF network element sends an N2 container to the (R)AN device, and the corresponding (R)AN device receives the N2 container from the AMF network element.

[0460] The N2 container includes authorized PC5 QoS parameters2, the preferred scheduling mode corresponding to authorized PC5 QoS parameters2, and the second mode indication. Through the second mode indication, the (R)AN device can configure the terminal to still use the direct communication interface resources obtained by the network scheduling mode to transmit PC5 service data when it is in the RRC-inactive state.

[0461] Step 905: The SMF network element sends an N1 container to the UE, and correspondingly, the UE receives the N1 container from the SMF network element.

[0462] The N1 container includes the identifier of the allowed service, authorized PC5 QoS parameters2, and the PC5 interface packet filter.

[0463] The following steps 906 to 911 take the example that the allowed services include application 1. In other words, the subsequent steps 906 to 911 take the example that the UE uses the direct communication interface resources on the PC5 interface to transmit the data of application 1.

[0464] Step 906: The UE requests the (R)AN device for direct communication interface resources for transmitting data of application 1.

[0465] It can be understood that steps 906 to 911 are optional steps, and steps 906 to 911 can be executed when the UE needs to send data of an allowed service.

[0466] Step 907: The (R)AN device configures direct communication interface resources for transmitting data of application 1 for the UE based on the preferred scheduling mode of the UE. Accordingly, the UE receives direct communication interface resources for transmitting data of application 1 from the (R)AN device.

[0467] Step 908: The UE uses the direct communication interface resources configured by the (R)AN device for the UE to send the data of application 1 on the PC5 interface according to the PC5 interface packet filter.

[0468] Step 909: The (R)AN device sends a first notification message to the UE according to the second mode indication, and accordingly, the UE receives the first notification message from the (R)AN device, wherein the first notification message is used to indicate that the UE enters the RRC-inactive state from the RRC-activated state.

[0469] It can be understood that, before step 909, the process also includes: the (R)AN device determines that there is no data transmission between the (R)AN device and the UE on the Uu interface.

[0470] Step 910, the (R)AN device sends a first indication message to the UE, where the first indication message is used to indicate that when the UE enters the RRC-inactive state, the UE is allowed to continue to use the above-mentioned direct communication interface resources configured by the (R)AN device for the UE to send data of application 1 on the PC5 interface.

[0471] Step 911: According to the first indication information, when the UE enters the RRC-inactive state, the UE continues to use the direct communication interface resources configured by the (R)AN device for the UE to send the data of application 1 on the PC5 interface.

[0472] Figure 7 and Figure 8 as well as Fig. 9 The service request message (Service Request message) in the embodiment shown corresponds to the first message in the above embodiment. The identifier of application 1 corresponds to the identifier of the first application in the above embodiment, and the service quality parameters (requested PC5 QoS parameters) 1 requested by the terminal to transmit data on the PC5 interface correspond to the first service quality parameters in the above embodiment. The source layer 2 identifier (source L2 ID) and the destination layer 2 identifier (destination L2ID) correspond to the first link identifier. The authorized PC5 QoS parameters 2 correspond to the authorized service quality parameters in the above embodiment.

[0473] refer to Fig.10 Another communication method provided in an embodiment of the present application includes:

[0474] Step 1001: UE sends a registration request message to the AMF network element through the (R)AN.

[0475] Correspondingly, the AMF network element receives the registration request message from the UE through the (R)AN.

[0476] The registration request message may include requested PC5 QoS parameters1 and an identifier of at least one service.

[0477] Optionally, the registration request message may also include a PC5 communication ID, wherein the PC5 communication ID is used to characterize a PC5 communication link for transmitting data of at least one service on a PC5 interface by the UE. For example, a PC5 communication link may consist of a source address and a destination address. The source address is a source layer 2 ID, for example, a layer 2 address of the UE (source L2 ID), and the destination address is a destination layer 2 ID, for example, a layer 2 address of the UE receiving the data of the PC5 service.

[0478] Optionally, the registration request message may also include a first mode indication, which is used to indicate that the UE requests to transmit PC5 service data on the PC5 interface in a network scheduling mode, or the first mode indication is used to indicate that the UE has the ability to transmit PC5 service data on the PC5 interface.

[0479] Step 1002: The AMF network element triggers a terminal policy control update (Npcf_UEPolicyControl_Update) message to the PCF network element.

[0480] Correspondingly, the PCF network element receives the service-based terminal policy control update message from the AMF network element.

[0481] The terminal policy control update message carries the requested PC5 QoS parameters 1 and the identifier of at least one service requested by the UE in step 1001. Optionally, the terminal policy control update message may also include the first mode indication and the PC5 communication identifier.

[0482] Step 1003: The PCF network element updates the policy of the UE.

[0483] The UE policy includes a PC5 communication ID for transmitting data of the allowed service, an identifier of the allowed service, and a PC5 interface service quality flow corresponding to the identifier of the allowed service. The PC5 interface service quality flow includes a PC5 interface Packet filter set. The PC5 interface Packet filter set includes the identifier of the allowed service.

[0484] Step 1004: The PCF network element sends an N1N2 communication message transfer service (Namf_Communication_N1N2Message Transfer) to the AMF network element.

[0485] Correspondingly, the AMF network element receives the Namf_Communication_N1N2MessageTransfer from the PCF network element. The Namf_Communication_N1N2Message Transfer includes the PC5 interface Packetfilter set. Optionally, the Namf_Communication_N1N2Message Transfer may also include a PC5 communication identifier.

[0486] Step 1005: The AMF network element transmits the UE's policy to the UE.

[0487] Correspondingly, the UE receives the policy of the UE from the AMF network element.

[0488] The UE policy may include a PC5 communicationID for transmitting data of the allowed service, an identifier of the allowed service, and a PC5 interface service quality flow corresponding to the identifier of the allowed service.

[0489] Fig.10 The illustrated embodiment mainly describes that the UE obtains the PC5 interface Packetfilter set, the PC5 communication ID authorized by the network side, and the identifier of the allowed service from the PCF network element through a registration process.

[0490] refer to Fig.11 Another communication method provided in an embodiment of the present application includes:

[0491] Step 1101: UE sends a service request message to the AMF network element.

[0492] Correspondingly, the AMF network element receives a service request message from the UE.

[0493] Among them, the service request message can be used by the UE to request the transmission of data of at least one service on the PC5 interface. Further, the service request message can be used by the UE to request the transmission of data of at least one service on the PC5 interface in a network scheduled mode.

[0494] Exemplarily, the service request message may carry at least one service identifier, and the service may refer to the above-mentioned related description.

[0495] Optionally, the service request message also carries a PC5 communication ID and / or an operation indication.

[0496] The PC5 communication ID is used to characterize a PC5 communication link for transmitting at least one service on a PC5 interface by a UE. For example, a PC5 communication link may include a source address and a destination address. The source address is a layer 2 address of the UE, and the destination address is a layer 2 address of a UE that receives data of the at least one service.

[0497] The operation indication is used to indicate the activation of the PC5 service. The so-called PC5 service refers to the service transmitted by the UE on the PC5 interface. The PC5 service may include at least one of the above services. The PC5 service in the embodiment of the present application may also be referred to as a VRU service.

[0498] Exemplarily, the Operation indication is set to "activate", indicating that the UE requests to transmit the data of the at least one service on the PC5 interface in a network scheduling mode. Or the Operation is set to "activate", indicating that the UE requests to activate the transmission of the data of the at least one service on the PC5 interface in a network scheduling mode. Among them, "activate" can be represented by a preset value, for example, by a preset binary "1".

[0499] As a possible implementation, step 1101 may be implemented in the following manner: the UE sends a service request message to the (R)AN device. Correspondingly, the (R)AN device sends a NAS message to the AMF network element, and the NAS message includes the service request message.

[0500] Step 1102: When the AMF network element does not have the context corresponding to the PC5 communication ID of the UE, the AMF network element sends message 1 to the PCF network element.

[0501] Correspondingly, the PCF network element receives message 1 from the AMF network element.

[0502] The message 1 may carry the PC5 communication ID and at least one service identifier. For example, the message 1 may be an AM policy request.

[0503] The context corresponding to the PC5 communication ID may refer to: the context of the PC5 communication link associated with the PC5 communication ID, and the context of the PC5 communication link at least includes authorized PC5 QoS parameters of the service transmitted on the PC5 communication link.

[0504] It should be noted that step 1102 to step 1103 are optional steps and may not be performed.

[0505] Step 1103: The PCF network element sends a response message 1 to the AMF network element.

[0506] Correspondingly, the AMF network element receives response message 1 from the PCF network element.

[0507] The response message 1 may include authorized PC5 QoS parameters (Authorized PC5 QoS parameters), an identifier of the allowed service, and a preferred scheduling mode for the PC5 service.

[0508] The allowed service may be all or part of at least one service, or the identifier of the allowed service may be obtained by the AMF network element from the subscription information of the UE. For example, the preferred scheduling mode of the PC5 service may be a network scheduling mode. For example, the preferred scheduling mode of the PC5 service may be carried in the RRC Inactive Assistance Information.

[0509] Assuming that the preferred scheduling mode of the PC5 service is the network scheduling mode, then through the response message 1 in step 1103, the AMF network element can determine that the network side authorizes the UE to use the network scheduling mode to transmit data of the allowed service on the PC5 interface.

[0510] Step 1104: The AMF network element sends an N2 message to the (R)AN device.

[0511] Correspondingly, the (R)AN device receives the N2 message from the AMF network element, wherein the N2 message may include the PC5 communication ID, the preferred scheduling mode of the PC5 service, the identifier of the allowed service, and the Authorized PC5 QoS parameters.

[0512] The preferred scheduling mode of the PC5 service may be carried in the RRC Inactive Assistance Information, or the Authorized PC5 QoS parameters may include the preferred scheduling mode of the PC5 service.

[0513] The PC5 communication ID, the preferred scheduling mode of the PC5 service, the identifier of the allowed service and the Authorized PC5 QoS parameters may be carried in the context of the UE.

[0514] Taking the preferred scheduling mode of PC5 service as the network scheduling mode as an example, the preferred scheduling mode of PC5 service can be used to indicate to the (R)AN device that when there is no data in the Uu between the (R)AN device and the UE for a preset time (for example, 30s), the (R)AN device needs to configure the UE to enter the RRC-inactive state, and when the UE is in the RRC-inactive state, the UE can continue to use the direct communication interface resources obtained in the network scheduling mode on the PC5 interface to send data of allowed services.

[0515] It can be understood that the (R)AN device can determine through the preferred scheduling mode of the PC5 service that when the UE is in the RRC-inactive state, the UE can continue to use the direct communication interface resources obtained in the network scheduling mode on the PC5 interface to send data of the allowed service.

[0516] In one possible implementation, the N2 message may also include a PC5 service mode indication, which indicates that when there is no data transmission between the UE and the (R)AN device on the Uu interface, the (R)AN device configures the terminal to enter the RRC-inactive state from the RRC-active state.

[0517] In a possible implementation, the N2 message may also include a service accept message sent by the AMF network element to the UE, wherein the service accept message includes an identifier of the allowed service. Optionally, the service accept message may also include a PC5 interface service quality flow provided by the PCF network element.

[0518] Of course, the identifier of the allowed service can also be carried in the N1 container sent by the AMF network element to the UE through the (R)AN device.

[0519] Step 1105: The (R)AN device sends an RRC connection reconfiguration message to the UE.

[0520] Correspondingly, the UE receives an RRC connection reconfiguration message from the (R)AN device. The RRC connection reconfiguration message includes an identifier of the allowed service sent by the AMF network element to the UE. Optionally, the RRC connection reconfiguration message includes a PC5 interface service quality flow provided by the PCF network element sent by the AMF network element to the UE.

[0521] Taking the example that the allowed services include the first application, the method provided in the embodiment of the present application may further include: step 1106.

[0522] Step 1106: The UE determines the PC5 interface service quality flow of the first application.

[0523] Specifically, step 1106 can be implemented in the following manner: the UE determines the PC5 interface service quality flow of the first application according to the PC5 interface service quality flow provided by the PCF network element, or the UE determines the PC5 interface service quality flow of the first application according to pre-configured parameters.

[0524] It is understandable that, after the Service Request process, if the UE intends to transmit data of the first application, the method may further include steps 1107 to 1112:

[0525] Step 1107: The UE requests the (R)AN device for direct communication interface resources for transmitting data of the first application.

[0526] Step 1108: The (R)AN device configures direct communication interface resources for the terminal for transmitting data of the first application.

[0527] Correspondingly, the UE receives direct communication interface resources for transmitting data of the first application from the (R)AN device.

[0528] Step 1109: The UE transmits data of the first application on the PC5 interface using the direct communication interface resources configured for the UE by the (R)AN device according to the PC5 interface service quality flow of the first application.

[0529] Specifically, one of the parameters in the service quality flow of the PC5 interface is the identifier of the first application. If the UE determines that the application identifier corresponding to the data to be transmitted is the same as the identifier of the first application, it is determined that the data to be transmitted is the data of the first application, and then the direct communication interface resources configured by the (R)AN device for the UE are used to transmit the data of the first application on the PC5 interface.

[0530] It can be understood that step 1109 is a process in which the UE transmits data of the first application on the direct communication interface resources when the UE is in the RRC-active state. Of course, step 1109 can be omitted.

[0531] Step 1110: The (R)AN device sends a first notification message to the UE according to the PC5 service mode indication.

[0532] The first notification message is used to notify the UE to enter the RRC-inactive state from the RRC-active state.

[0533] For example, when there is no data transmission between the UE and the (R)AN device on the Uu interface, the (R)AN device configures the terminal to enter the RRC-inactive state from the RRC-active state. In the RRC-inactive state, the RRC connection between the UE and the (R)AN device is released.

[0534] Step 1111: The (R)AN device sends first indication information to the UE.

[0535] Correspondingly, the UE receives first indication information from the (R)AN device. The first indication information is used to indicate that when the UE is in the RRC-inactive state, the UE can continue to use the direct communication interface resources configured by the (R)AN device for the UE to transmit data of the allowed service on the PC5 interface.

[0536] Step 1112: When the UE is in the RRC-inactive state, the UE transmits data of the first application on the PC5 interface using the direct communication interface resources configured for the UE by the (R)AN device according to the first indication information.

[0537] It should be noted that step 1111 is an optional step, and accordingly, step 1112 can be replaced by: when the UE is in the RRC-inactive state, the UE uses the direct communication interface resources configured for the UE by the above-mentioned (R)AN device to transmit the data of the first application on the PC5 interface.

[0538] It is understandable that in Fig.11 In the illustrated embodiment, Authorized PC5 QoS parameters2 corresponds to the authorized service quality parameters. The service acceptance message may correspond to the fourth message. The service request message may correspond to the first message in the illustrated embodiment.

[0539] refer to Fig.12 Another communication method provided in an embodiment of the present application includes:

[0540] Step 1201: The UE sends a service request message to the AMF network element.

[0541] Correspondingly, the AMF network element receives a service request message from the UE.

[0542] Among them, the service request message can be used by the UE to request to upload PC5 service data on the PC5 interface. Further, the service request message can be used by the UE to request to transmit PC5 service data on the PC5 interface in a network scheduled mode.

[0543] Exemplarily, the service request message may carry the identifier and / or operation (Operation) indication of the PC5 service. The service may refer to the above-mentioned related description. The PC5 service may also be called VRU service.

[0544] The operation indication is used to indicate that the UE requests to activate the PC5 service, or the UE requests to activate the transmission of the PC5 service in a network scheduling mode.

[0545] Exemplarily, the Operation indication is set to "activate", indicating that the UE requests to transmit the data of the above-mentioned PC5 service on the PC5 interface in the network scheduling mode. Or the Operation is set to "activate", indicating that the UE requests to activate the transmission of the data of the above-mentioned PC5 service on the PC5 interface in the network scheduling mode. Among them, "activate" can be represented by a preset value, for example, by a preset binary "1".

[0546] As a possible implementation, step 1201 may be implemented in the following manner: the UE sends a service request message to the (R)AN device. Correspondingly, the (R)AN device sends a NAS message to the AMF network element, and the NAS message includes the service request message.

[0547] It is worth noting that other processes may be included between step 1201 and step 1202. For example, the UE intends to send uplink data to the (R)AN device (the UE intends to send uplink data at the same time).

[0548] Step 1202: The AMF network element sends an N2 message to the (R)AN device.

[0549] Correspondingly, the (R)AN device receives the N2 message from the AMF network element. The N2 message may include the preferred scheduling mode for the PC5 service and the identifier of the allowed service of the UE. The allowed service belongs to the service in the PC5 service.

[0550] In a possible implementation, the N2 message may also include a service accept message sent by the AMF network element to the UE, wherein the service accept message includes an identifier of the UE's allowed service.

[0551] It can be understood that the (R)AN device can determine the preferred scheduling mode of the allowed services of the UE through the N2 message.

[0552] Step 1203: The (R)AN device sends an RRC connection reconfiguration message to the UE.

[0553] Correspondingly, the UE receives an RRC connection reconfiguration message from the (R)AN device.

[0554] The RRC connection reconfiguration message includes a service acceptance message.

[0555] The above steps 1201 to 1203 may be referred to as a service request procedure. After the service request procedure, the method provided in the embodiment of the present application may further include: the UE requests a wireless resource for transmitting the data of the above PC5 service, and the UE transmits the data of the PC5 service in an energy-saving manner. For example, the UE may transmit the data of the PC5 service in an energy-saving manner by using the direct communication interface resources obtained by the UE in the network scheduling mode. For example, Fig.11 Steps 1107 to 1112 in .

[0556] Fig.13 Another embodiment provided by the present application is shown, and the embodiment includes:

[0557] Step 1301: UE sends a service request message to (R)AN equipment.

[0558] Correspondingly, the (R)AN device receives the service request message from the UE.

[0559] The service request message is used to indicate that the UE wishes to stop transmitting data on the PC5 interface, or to indicate that the UE wishes to stop transmitting data on the PC5 interface using the network scheduling mode. Alternatively, if the service request message also carries the identifier of the first application, the service request message is used to indicate that the UE wishes to stop transmitting data of the first application on the PC5 interface. The first application is an allowed service of the UE.

[0560] The service request message includes an Operation indication. The Operation indication is set to "deactivate", indicating that the UE wishes to stop transmitting data on the PC5 interface. Or the Operation is set to "deactivate", indicating that the UE requests to deactivate data transmission on the PC5 interface in network scheduling mode. Or the Operation is set to "deactivate", indicating that the UE wishes to stop transmitting data of the first application on the PC5 interface. "Deactivate" can be represented by a preset value, for example, by a preset binary "0".

[0561] Step 1302: The (R)AN device sends a NAS message to the AMF network element.

[0562] Correspondingly, the AMF network element receives NAS messages from the (R)AN device.

[0563] The NAS message includes a service request message.

[0564] Step 1303: The AMF network element sends an N2 message to the (R)AN device.

[0565] Correspondingly, the (R)AN receives the N2 message from the AMF network element.

[0566] As an example, the N2 message does not include the preferred scheduling mode of the PC5 service. If the N2 message does not include the preferred scheduling mode of the PC5 service, the (R)AN device can determine to release the direct communication interface resources configured for the PC5 service through the N2 message. For example, the N2 message includes RRC Inactive Assistance Information, and the RRC Inactive Assistance Information does not include the preferred scheduling mode of the PC5 service.

[0567] As an example, the N2 message may carry auxiliary information, and the auxiliary information is used by the (R)AN device to determine the release of the direct communication interface resources configured for the PC5 service.

[0568] Step 1304: The (R)AN device releases the direct communication interface resources configured for the UE for transmitting data of the PC5 service according to the N2 message.

[0569] It is worth noting that if the UE wishes to stop transmitting the data of the first application on the PC5 interface in step 1301, the N2 message sent by the AMF network element to the (R)AN device may also carry the identifier of the first application, so that the (R)AN device can release the direct communication interface resources configured for the UE for transmitting the data of the first application. In other words, the (R)AN device may not release the direct communication interface resources configured for data other than the first application in the PC5 service.

[0570] It can be understood that in this embodiment, after the Service Request procedure, when the (R)AN device determines that there is no data transmission with the UE on the Uu interface within a preset time, the (R)AN device configures the UE to enter RRC_IDLE and CM_IDLE.

[0571] Fig.13 The Service Request message in the illustrated embodiment corresponds to the fourth message in the above-mentioned embodiment.

[0572] Embodiments of the present application Figures 4 to 13 The various steps and related terms between the described embodiments can refer to each other.

[0573] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the interaction between various network elements. It can be understood that in order to realize the above functions, each network element, such as access network equipment, terminal, access management network element, etc., includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0574] The embodiments of the present application can divide the functional units of the access network equipment, terminal, and access management network element according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0575] Combined with the above Figures 4 to 13, the method of the embodiment of the present application is described, and the communication device for executing the above method provided by the embodiment of the present application is described below. Those skilled in the art can understand that the method and the device can be combined and referenced with each other, and the communication device provided by the embodiment of the present application can execute the steps executed by the access network device, the terminal, and the access management network element in the above communication method.

[0576] In the case of an integrated unit, Fig.14 The communication device involved in the above embodiment is shown, and the communication device may include: a communication unit 102 and a processing unit 101.

[0577] In one example, the communication device is a terminal, or a chip used in a terminal. In this case, the communication unit 102 is used to support the communication device to perform the above-mentioned embodiment. Figure 4 The processing unit 101 is used to support the communication device to perform the receiving action performed by the terminal in step 401. Figure 4 The communication unit 102 is further configured to support the communication device to execute the sending action executed by the terminal in step 402 of the above embodiment.

[0578] In a possible embodiment, the communication unit 102 is also used to support the communication device to execute the sending action performed by the terminal in steps 501, 503, 504, 506, 509, and 510 in the above embodiments, and the communication unit 102 is also used to support the communication device to execute the receiving action performed by the terminal in steps 502, 505, and 508 in the above embodiments.

[0579] In another example, the communication device is an access network device, or a chip used in an access network device. In this case, the communication unit 102 is used to support the communication device to perform the sending action performed by the access network device in step 401 in the above embodiment. The processing unit 101 is used to support the communication device to perform the resource allocated to the terminal for transmitting the data of the first application in the above embodiment.

[0580] In a possible implementation, the communication unit 102 is further configured to support the communication device to perform the sending action performed by the access network device in step 508 of the above embodiment. The communication unit 102 is further configured to support the communication device to perform the receiving action performed by the access network device in step 511 of the above embodiment. The processing unit 101 is configured to support the communication device to perform the processing action performed by the access network device in step 512 of the above embodiment.

[0581] In another example, the communication device is an access management network element, or a chip used in an access management network element. In this case, the communication unit 102 is used to support the communication device to perform the above-mentioned embodiment. Figure 5 The sending action is performed by the access management network element in step 502. The processing unit 101 is further configured to support the communication device to perform the action of determining the identifier of one or more applications in the above embodiment.

[0582] In a possible embodiment, the communication unit 102 is further used to support the communication device to perform the receiving action performed by the access management network element in step 503, step 504, and step 510 in the above embodiment. The communication unit 102 is also used to support the communication device to perform the sending action performed by the access management network element in step 505 and step 511 in the above embodiment.

[0583] In the case of an integrated unit, Fig.15 A possible logical structure diagram of the communication device involved in the above embodiment is shown. The communication device includes: a processing module 112 and a communication module 113. The processing module 112 is used to control and manage the actions of the communication device. For example, the processing module 112 is used to execute the steps of information / data processing in the communication device. The communication module 113 is used to support the communication device to send or receive information / data.

[0584] In a possible embodiment, the communication device may further include a storage module 111 for storing program codes and data of the communication device.

[0585] In one example, the communication device is a terminal, or a chip used in a terminal. In this case, the communication module 113 is used to support the communication device to execute the above-mentioned embodiment. Figure 4 The processing module 112 is used to support the communication device to perform the receiving action performed by the terminal in step 401. Figure 4 The communication module 113 is also used to support the communication device to execute the sending action executed by the terminal in step 402 of the above embodiment.

[0586] In a possible embodiment, the communication module 113 is also used to support the communication device to execute the sending action performed by the terminal in steps 501, 503, 504, 506, 509, and 510 in the above embodiments, and the communication module 113 is also used to support the communication device to execute the receiving action performed by the terminal in steps 502, 505, and 508 in the above embodiments.

[0587] In another example, the communication device is an access network device, or a chip used in an access network device. In this case, the communication module 113 is used to support the communication device to perform the sending action performed by the access network device in step 401 in the above embodiment. The processing module 112 is used to support the communication device to perform the resource allocated to the terminal for transmitting the data of the first application in the above embodiment.

[0588] In a possible implementation, the communication module 113 is further used to support the communication device to perform the sending action performed by the access network device in step 508 of the above embodiment. The communication module 113 is further used to support the communication device to perform the receiving action performed by the access network device in step 511 of the above embodiment. The processing module 112 is used to support the communication device to perform the processing action performed by the access network device in step 512 of the above embodiment.

[0589] In another example, the communication device is an access management network element, or a chip used in an access management network element. In this case, the communication module 113 is used to support the communication device to execute the above-mentioned embodiment. Figure 5 The sending action is performed by the access management network element in step 502. The processing module 112 is also used to support the communication device to perform the action of determining the identifier of the authorized service in the above embodiment.

[0590] In a possible embodiment, the communication module 113 is further used to support the communication device to perform the receiving action performed by the access management network element in step 503, step 504, and step 510 in the above embodiment. The communication module 113 is also used to support the communication device to perform the sending action performed by the access management network element in step 505 and step 511 in the above embodiment.

[0591] Among them, the processing module 112 can be a processor or a controller, for example, a central processing unit, a general processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processor can also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, etc. The communication module 113 can be a transceiver, a transceiver circuit or a communication interface, etc. The storage module 111 can be a memory.

[0592] When the processing module 112 is the processor 31 or the processor 35, the communication module 113 is the transceiver 33, and the storage module 111 is the memory 32, the communication device involved in the present application can be Figure 3 The communication device shown.

[0593] It should be noted that if Figure 3 The communication device shown is an access management network element. Figure 3 The transceiver 33 in can be replaced by a communication interface.

[0594] In one example, the communication device is a terminal, or a chip used in a terminal. In this case, the transceiver 33 is used to support the communication device to execute the above-mentioned embodiment. Figure 4 The receiving action performed by the terminal in step 401. The processor 31 and / or the processor 35 are configured to support the communication device to perform Figure 4 The transceiver 33 is also used to support the communication device to execute the sending action executed by the terminal in step 402 of the above embodiment.

[0595] In a possible embodiment, the transceiver 33 is further used to support the communication device to execute the sending action executed by the terminal in step 501, step 503, step 504, step 506, step 509, and step 510 in the above embodiment, and the transceiver 33 is further used to support the communication device to execute the receiving action executed by the terminal in step 502, step 505, and step 508 in the above embodiment. The processor 31 and / or the processor 35 is used to support the communication device to execute step 509 in the above embodiment.

[0596] In another example, the communication device is an access network device, or a chip used in an access network device. In this case, the transceiver 33 is used to support the communication device to perform the sending action performed by the access network device in step 401 in the above embodiment. The processor 31 and / or the processor 35 are used to support the communication device to perform the resource allocated to the terminal for transmitting the data of the first application determined in the above embodiment.

[0597] In a possible implementation, the transceiver 33 is further used to support the communication device to perform the sending action performed by the access network device in step 508 of the above embodiment. The transceiver 33 is further used to support the communication device to perform the receiving action performed by the access network device in step 511 of the above embodiment. The processor 31 and / or the processor 35 is used to support the communication device to perform the processing action performed by the access network device in step 512 of the above embodiment.

[0598] In another example, the communication device is an access management network element, or a chip used in an access management network element. In this case, the communication interface is used to support the communication device to execute the above-mentioned embodiment. Figure 5 The sending action is performed by the access management network element in step 502. The processor 31 and / or the processor 35 is further configured to support the communication device to perform the action of determining the identifier of one or more applications in the above embodiment.

[0599] In a possible embodiment, the communication interface is further used to support the communication device to perform the receiving action performed by the access management network element in step 503, step 504, and step 510 in the above embodiment. The communication interface is also used to support the communication device to perform the sending action performed by the access management network element in step 505 and step 511 in the above embodiment.

[0600] Fig.16 1 is a schematic diagram of the structure of a chip 150 provided in an embodiment of the present application. The chip 150 includes one or more than two (including two) processors 1510 and a communication interface 1530 .

[0601] Optionally, the chip 150 further includes a memory 1540, which may include a read-only memory and a random access memory, and provides operation instructions and data to the processor 1510. A portion of the memory 1540 may also include a non-volatile random access memory (NVRAM).

[0602] In some embodiments, the memory 1540 stores the following elements, execution modules or data structures, or a subset thereof, or an extended set thereof.

[0603] In the embodiment of the present application, the corresponding operation is performed by calling the operation instruction stored in the memory 1540 (the operation instruction may be stored in the operating system).

[0604] In a possible implementation, the structures of chips used by access network equipment, terminals, and access management network elements are similar, and different devices may use different chips to implement their respective functions.

[0605] The processor 1510 controls the processing operation of any one of the access network device, the terminal, and the access management network element. The processor 1510 may also be called a central processing unit (CPU).

[0606] The memory 1540 may include a read-only memory and a random access memory, and provides instructions and data to the processor 1510. A portion of the memory 1540 may also include an NVRAM. For example, in an application, the memory 1540, the communication interface 1530, and the memory 1540 are coupled together via a bus system 1520, wherein the bus system 1520 may include a power bus, a control bus, and a status signal bus in addition to a data bus. However, for the sake of clarity, in Fig.16 Various buses are labeled as bus system 1520.

[0607] The method disclosed in the above embodiment of the present application can be applied to the processor 1510, or implemented by the processor 1510. The processor 1510 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 1510. The above processor 1510 can be a general-purpose processor, a digital signal processor (digital signal processing, DSP), an ASIC, a field-programmable gate array (field-programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to execute, or the hardware and software modules in the decoding processor can be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1540, and the processor 1510 reads the information in the memory 1540 and completes the steps of the above method in combination with its hardware.

[0608] In one possible implementation, the communication interface 1530 is used to execute Figure 4-Figure 13 The steps of receiving and sending of the access network device, terminal, and access management network element in the embodiment shown. The processor 1510 is configured to execute Figure 4-Figure 13 The processing steps of the access network device, terminal, and access management network element in the illustrated embodiment.

[0609] The above communication unit may be a communication interface of the device, used to receive signals from other devices. For example, when the device is implemented in the form of a chip, the transceiver unit is a communication interface of the chip used to receive or send signals from other chips or devices.

[0610] In one aspect, a computer-readable storage medium is provided, wherein instructions are stored in the computer-readable storage medium, and when the instructions are executed, the following is implemented: Figure 4-5 The function of the terminal.

[0611] In one aspect, a computer-readable storage medium is provided, wherein instructions are stored in the computer-readable storage medium, and when the instructions are executed, the following is implemented: Figure 4-Figure 5 The functions of the access network equipment.

[0612] In one aspect, a computer-readable storage medium is provided, wherein instructions are stored in the computer-readable storage medium, and when the instructions are executed, the following is implemented: Figure 4-5 The function of access management network element.

[0613] In one aspect, a computer program product is provided, wherein the computer program product includes instructions, and when the instructions are executed, the following are implemented: Figure 4-5 The function of access management network element.

[0614] In another aspect, a computer program product comprising instructions is provided. The computer program product comprises instructions. When the instructions are executed, the following are implemented: Figure 4-Figure 5 The functions of the access network equipment.

[0615] In another aspect, a computer program product comprising instructions is provided. The computer program product comprises instructions. When the instructions are executed, the following are implemented: Figure 4-Figure 5 The function of the terminal.

[0616] In one aspect, a chip is provided, which is applied to a terminal, and the chip includes at least one processor and a communication interface, wherein the communication interface is coupled to the at least one processor, and the processor is used to run instructions to implement the following Figure 4-5 The function of the terminal.

[0617] In another aspect, a chip is provided, which is applied to an access network device, and the chip includes at least one processor and a communication interface, wherein the communication interface is coupled to the at least one processor, and the processor is used to run instructions to implement the following Figure 4-5 The functions of the access network equipment.

[0618] In another aspect, a chip is provided, which is applied to an access management network element, and the chip includes at least one processor and a communication interface, the communication interface is coupled to the at least one processor, and the processor is used to run instructions to implement the following Figure 4-5 The function of access management network element.

[0619] The embodiment of the present application provides a communication system, which includes: a terminal, an access management network element and an access network device. The terminal is used to execute Figure 4-5 The functions executed by the terminal in the access management network element are used to execute 4~ Figure 5 The access network device is used to perform the steps in any one of the steps performed by the access management network element. Figure 4-5 Functions performed by access network equipment.

[0620] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, for example, a floppy disk, a hard disk, a tape; it may also be an optical medium, for example, a digital video disc (DVD); it may also be a semiconductor medium, for example, a solid state drive (SSD).

[0621] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0622] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: include: The terminal receives resource information from the access network device, where the resource information is used to characterize direct communication interface resources; The terminal transmits data via the direct communication interface resources, and the terminal is in a radio resource control RRC-inactive state.

2. The method according to claim 1, characterized in that The direct communication interface resource is a direct communication interface resource based on a network scheduling mode.

3. The method according to claim 1 or 2, characterized in that: Before the terminal receives the resource information from the access network device, the method further includes: The terminal requests the direct communication interface resource from the access network device.

4. The method according to claim 1 or 2, characterized in that: The data is data of a first application of the terminal, and the direct communication interface resources are used to transmit the data of the first application.

5. The method according to claim 4, characterized in that The first application belongs to an allowed service of the terminal, and the method further includes: The terminal receives an identifier of the allowed service of the terminal from an access management network element.

6. The method according to claim 5, characterized in that Before the terminal receives the identifier of the allowed service of the terminal from the access management network element, the method further includes: The terminal sends at least one service identifier to the access management network element, where the at least one service identifier is used to indicate the service requested by the terminal.

7. The method according to claim 6, characterized in that The identifier of the at least one service is carried in a first message, and the first message further includes a first parameter, where the first parameter is used to represent that the terminal requests to transmit data using a network scheduling mode on a direct communication interface.

8. The method according to claim 7, characterized in that The method comprises: The terminal receives first indication information, where the first indication information is used to indicate that the terminal is allowed to transmit data of the first application using a direct communication interface resource based on a network scheduling mode when the terminal is in the RRC-inactive state; The terminal transmits data through the direct communication interface resource, including: The terminal transmits the data of the first application through the direct communication interface resources according to the first indication information.

9. The method according to claim 7 or 8, characterized in that: The first message further includes a first link identifier, where the first link identifier indicates a communication link used by the terminal to transmit data on a direct communication interface.

10. The method according to any one of claims 5 to 8, characterized in that: The allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface.

11. The method according to any one of claims 1, 2 or 5 to 8, characterized in that: The method further comprises: The terminal sends a first quality of service parameter to the access management network element, where the first quality of service parameter is a quality of service parameter used by the terminal to request data transmission on the direct communication interface.

12. The method according to any one of claims 1, 2 or 5 to 8, characterized in that: The method further comprises: The terminal receives authorized quality of service parameters from an access management network element, where the authorized quality of service parameters are used by the terminal to transmit data on a direct communication interface.

13. The method according to any one of claims 1, 2 or 5 to 8, characterized in that: The data is data of the first application, the direct communication interface is a PC5 interface, and the method further includes: The terminal generates a PC5 interface quality of service flow corresponding to the first application; The terminal associates the data of the first application with the PC5 interface quality of service flow.

14. The method according to claim 13, characterized in that The terminal generates a PC5 interface service quality flow corresponding to the first application, including: The terminal receives configuration information from a policy control network element, and the terminal generates a PC5 interface service quality flow corresponding to the first application according to the configuration information; or, The terminal generates a PC5 interface service quality flow corresponding to the first application according to preconfigured parameters.

15. The method according to claim 14, characterized in that The method further comprises: The terminal sends a second parameter to the access management network element, where the second parameter is used to indicate that the terminal stops transmitting data on the direct communication interface.

16. The method according to claim 14 or 15, characterized in that Before the terminal transmits data through the direct communication interface resource, the method further includes: The terminal enters the RRC-inactive state.

17. The method according to claim 16, characterized in that The method further comprises: The terminal receives a first notification message from the access network device, where the first notification message is used to notify the terminal to enter an RRC-inactive state; The terminal enters the RRC-inactive state, including: The terminal enters an RRC-inactive state according to the first notification message.

18. A communication method, characterized in that: include: The access network device sends resource information to the terminal, where the resource information is used to represent direct communication interface resources, and the direct communication interface resources are used for the terminal to transmit data when it is in a radio resource control RRC-inactive state.

19. The method according to claim 18, characterized in that The direct communication interface resource is a direct communication interface resource based on a network scheduling mode.

20. The method according to claim 18 or 19, characterized in that The method further comprises: The access network device receives a scheduling mode of the terminal from an access management network element, where the scheduling mode includes a network scheduling mode or a terminal autonomous selection mode; The access network device sends resource information to the terminal, including: The access network device sends the resource information to the terminal according to the scheduling mode of the terminal.

21. The method according to claim 20, characterized in that The data is data of a first application, and the scheduling mode is a scheduling mode corresponding to the first application.

22. The method according to claim 21, characterized in that The first application belongs to an allowed service of the terminal.

23. The method according to claim 22, characterized in that The allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface.

24. The method according to any one of claims 18, 19 or 21 to 23, characterized in that: The method further comprises: The access network device sends first indication information to the terminal, where the first indication information is used to indicate that the terminal is allowed to transmit data of a first application using direct communication interface resources based on a network scheduling mode when in the RRC-inactive state.

25. The method according to any one of claims 18, 19 or 21 to 23, characterized in that: The method further comprises: The access network device sends a first notification message to the terminal, where the first notification message is used to notify the terminal to enter an RRC-inactive state.

26. The method according to any one of claims 18, 19 or 21 to 23, characterized in that: The method further comprises: When the terminal stops transmitting data through the direct communication interface resource, the access network device releases the direct communication interface resource.

27. A communication device, characterized in that: include: At least one processor, the at least one processor is coupled to a memory, the memory stores instructions, and the processor executes the instructions to implement the method according to any one of claims 1 to 17.

28. A communication device, characterized in that: include: At least one processor, the at least one processor is coupled to a memory, the memory stores instructions, and the processor executes the instructions to implement the method according to any one of claims 18 to 26.

29. A communication system, characterized in that: The access network device is used to execute the method according to any one of claims 18 to 26.

30. The system according to claim 29, characterized in that It also includes a terminal, wherein the terminal is used to execute the method according to any one of claims 1 to 17.

31. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed, the method described in any one of claims 1 to 17 above is implemented, or the method described in any one of claims 18 to 26 is implemented.

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