WO2021037271A1

WO2021037271A1 - Communication method, device and system

Info

Publication number: WO2021037271A1
Application number: PCT/CN2020/112670
Authority: WO
Inventors: 李濛; 应江威; 杨艳梅
Original assignee: 华为技术有限公司
Priority date: 2019-08-31
Filing date: 2020-08-31
Publication date: 2021-03-04
Also published as: CN112449311B; CN112449311A

Abstract

Provided in embodiments of the present application are a communication method, device and system, which can transmit different data of services more reasonably and flexibly. The method comprises: a session management network element determining a first access network type of a first service, and sending the first access network type; an access network device receiving an access network type and first information of the first service, the first information comprising a first downlink address of the first service or a first identification parameter of the first service; when the type of the access network device is the same as the first access network type, if the first information is the first downlink address, the access network device sending to a first user plane network element a first message that carries the first downlink address and that is used for establishing a transmission path for first data of the first service between the first user plane network element and the access network device; and if the first information is the first identification parameter, sending downlink data when the access network device identifies the downlink data to be the first data of the first service according to the first identification parameter.

Description

Communication method, equipment and system

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office on August 31, 2019, the application number is 201910819962.2, and the application name is "communication methods, equipment and systems", the entire content of which is incorporated into this application by reference .

Technical field

This application relates to the field of communication technology, and in particular to communication methods, equipment and systems.

Background technique

H.264/H.265 supports scalable video coding (SVC)/high efficiency video coding (HEVC) video stream layered transmission. Among them, the basic layer data is required to be transmitted in the video. Reliably received content, enhancement layer data can further refine the content of the base layer data (for example, higher resolution). In short, the basic layer data belongs to "sending charcoal in the snow", and the enhanced layer data belongs to "icing on the cake".

In the prior art, the same type of base station is usually used to transmit the basic layer data and the enhancement layer data in the video stream. On the one hand, because the base station needs to carry more services, the load on the base station is too large and cannot provide all services for each service. The required transmission resources, which in turn leads to poor transmission quality of service data, thereby reducing user experience; on the other hand, the resources provided by the base station need to meet the transmission resources required for different types of data of the same service at the same time, which in turn causes the base station to provide each There are many transmission resources allocated by the service. However, the base station may not need to use all the resources allocated for the service when transmitting a certain type of data for the service at a certain moment, which leads to a waste of resources; on the other hand, it adopts a fixed transmission method for transmission. Different types of business data are less flexible.

Therefore, how to transmit data of different types of services reasonably and flexibly is a problem to be solved urgently at present.

Summary of the invention

The embodiments of the present application provide a communication method, device, and system, which can transmit data of different types of services more rationally and flexibly.

In order to achieve the foregoing objectives, the embodiments of the present application adopt the following technical solutions:

In the first aspect, a communication method and corresponding communication device are provided. In this solution, the session management network element determines the first access network type, and sends the first access network type to the mobility management network element, where the first access network type is the first type used to transmit the first service The type of data access network. Based on this solution, the session management network element can determine the type of access network that transmits the first type of data, and then can determine the access network device that transmits the first type of data according to the type of the access network, so that the first type of data can be transferred Transmitted to the access network device corresponding to the first type of data, and finally the first type of data is transmitted by the access network device, that is to say, the different types of data of the first service are all performed by the access network device corresponding to the data type Transmission, therefore, on the one hand, the transmission resources that the access network device needs to provide are reduced, and the transmission resources required by the type of data corresponding to the access network device can be guaranteed, thereby improving the transmission quality of this type of data and improving user experience; On the other hand, the transmission resources provided by the access network equipment only need to guarantee the transmission requirements of one type of data of the service, which can reduce the waste of transmission resources caused to meet the transmission requirements of other types of data of the service at the same time; on the other hand, The session management network element can flexibly configure the access network equipment that transmits different types of data of the service for the service according to the type of the service data. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

In a possible design, the above-mentioned first access network type includes terrestrial broadcasting, or mixed-mode multicast or broadcasting. Based on this solution, an access network device that uses terrestrial broadcasting or an access network device that uses mixed-mode multicast or broadcast can only transmit service-specific data.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element sends first information to the mobility management network element, where the first information includes the first downlink address or the first identification parameter, where , The first downlink address is a downlink address of the first type of data of the first service, and the first identification parameter is used to identify the first type of data of the first service. Based on this solution, on the one hand, when the first information includes the first downlink address, the access network device determined according to the first access network type can communicate with the access network device and the user plane network element according to the first downlink address. A transmission path for transmitting the first type of data of the first service is established between them. Therefore, the first type of data can be transmitted to the specific type of access network equipment corresponding to the first type of data through the transmission path, and the The access network device transmits the first type of data. On the other hand, when the first information includes the first identification parameter, the access network device determined according to the first access network type can identify the downlink data according to the first identification parameter, and when the access network device recognizes that the downlink data is The downlink data is sent when the first type of data of the first service is transmitted. Therefore, the type matching and downlink data identification can be performed by the access network device, and the type of the access network device corresponds to the first type of data on the first access network. When the types match, the access network device can transmit the first type of data, where the match can be understood as the same.

In a possible design, when the above-mentioned first information includes the first downlink address, the communication method provided in the embodiment of the present application further includes: the session management network element sends the identity and the identity of the first user plane network element to the application function network element Indication Information The indication information is the type identifier of the first type of data of the first service, or the indication information is the QoS parameter of the first type of data. Based on this solution, when the application function network element subsequently sends downlink data, it can be determined according to the identifier and indication information of the first user plane network element that the first type of data of the first service needs to be sent to the first user plane network element.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element determines the second access network type, and sends the second access network type to the mobility management network element, where the second access network type The second access network type is the type of the access network used to transmit the second type of data of the first service. Based on this solution, the session management network element can determine the type of access network that transmits the second type of data, and then can determine the access network device that transmits the second type of data according to the type of the access network, so that the second type of data can be transferred It is transmitted to a specific type of access network device corresponding to the second type of data, and the access network device finally transmits the second type of data. Therefore, on the one hand, the access network device that transmits the first type of data can guarantee the first type of data. Data transmission quality, the access network equipment that transmits the second type of data can guarantee the quality of the transmission number of the second type of data, thereby further improving the user experience; on the other hand, it can be based on the transmission requirements of the first type of data and the second type of data Reasonably and flexibly choose access network equipment.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element sends second information to the mobility management network element, the second information includes a second downlink address or a second identification parameter, where: The second downlink address is a downlink address of the second type of data of the first service, and the second identification parameter is used to identify the second type of data of the first service. Based on this solution, on the one hand, when the second information includes the second downlink address, the access network device determined according to the second access network type can be between the access network device and the user plane network element according to the second downlink address A transmission path for transmitting the second type of data of the first service is established. Therefore, the second type of data can be transmitted to a specific type of access network device corresponding to the second type of data, and the access network device finally transmits the second type of data. Two types of data. On the other hand, when the first information includes the second identification parameter, the access network device determined according to the second access network type can identify the downlink data according to the second identification parameter, and when the access network device recognizes that the downlink data is The downlink data is sent when the second type of data of the first service is transmitted. Therefore, type matching and downlink data identification can be performed at the access network equipment, so that the specific type of access network equipment corresponding to the second type of data can transmit the second type of data. One type of data.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element sends a first downlink address, the first identification parameter, the second downlink address, and the first downlink address to the user plane network element. Two identification parameters, where the first identification parameter is used to identify the first type of data of the first service, and the second identification parameter is used to identify the second type of data of the first service. Based on this solution, the user plane network element can identify the downlink data according to the identification parameters of the service. When the user plane network element recognizes the downlink data as the first type of data of the first service according to the first identification parameter, the user plane network element recognizes the downlink data as the first type of data of the first service according to the first download. The downlink data is sent by the row address, so that the first access network device determined according to the first access network type can receive the downlink data, so as to transmit the first type data to the first access network device corresponding to the first type data Finally, the first access network device transmits the first type of data; when the user plane network element recognizes that the downlink data is the second type of data of the first service according to the second identification parameter, the downlink data is sent according to the second downlink address, The second type of data is transmitted to the second access network device corresponding to the second type of data, and the second type of data is finally transmitted by the second access network device.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element sends the first downlink address and the first identification parameter to the user plane network element, and the first identification parameter is used to identify The first type of data of the first service. Based on this solution, the user-plane network element can identify the downlink data according to the identification parameters of the service. When the user-plane network element recognizes that the downlink data is the first type of data of the first service according to the first identification parameter, the user plane network element recognizes the downlink data as the first type of data of the first service according to the first download. The downlink data is sent by the row address, so that the first access network device determined according to the first access network type can receive the downlink data, so as to transmit the first type data to the first access network device corresponding to the first type data , And finally the first type of data is transmitted by the first access network device.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element sends the second downlink address and the second identification parameter to the user plane network element, and the second identification parameter is used to identify the The second type of data for the first service. Based on this solution, the user-plane network element can identify the downlink data according to the identification parameters of the service. When the user-plane network element recognizes that the downlink data is the second type of data of the first service according to the second identification parameter, the user-plane network element can recognize the downlink data according to the second type of data of the first service. The address sends the downlink data to transmit the second type data to the second access network device corresponding to the second type data, and the second access network device finally transmits the second type data.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element receives the first identification parameter and the second identification parameter from the application function network element.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element receives the type identification of the second type data from the application function network element; the session management network element determines the second access network type , Including: the session management network element determines the second access network type according to the type identifier of the second type data and the correspondence between the type identifier and the access network type.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element receives the quality of service QoS parameters of the second type of data; the session management network element determines the second access network type, including: session The management network element determines the second access network type according to the QoS parameters of the second type data.

In a possible design, the QoS parameter of the second type of data includes a packet error rate PER parameter of the second type of data, and the value of the PER parameter is a first value; the session management network element is based on the second type of data Determining the second access network type including: when the first value is greater than or equal to a first preset threshold, the session management network element determines that the second access network type is terrestrial broadcasting; or, when When the first value is less than the first preset threshold, the session management network element determines that the type of the second access network is mixed-mode multicast or broadcast.

In a possible design, the QoS parameter of the second type data includes the packet delay budget PDB parameter of the second type data, and the value of the PDB parameter is the second value; the session management network element is based on the second type The QoS parameter of the data to determine the second access network type includes: when the second value is greater than or equal to a second preset threshold, the session management network element determines that the second access network type is terrestrial broadcasting; or, When the second value is less than the second preset threshold, the session management network element determines that the type of the second access network is mixed-mode multicast or broadcast.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element receives the type identification of the first type data from the application function network element; the session management network element determines the first access network type , Including: the session management network element determines the first access network type according to the type identifier of the first type data and the correspondence between the type identifier and the access network type.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element receives the QoS parameters of the first type of data; the session management network element determines the type of the first access network, including: session management network The element determines the type of the first access network according to the QoS parameters of the data of the first type.

In a possible design, the QoS parameter of the first type of data includes the PER parameter of the first type of data, and the value of the PER parameter of the first type of data is a third value; the session management network element is based on the first type of data. The QoS parameter of the type data determines the type of the first access network, including: when the third value is greater than or equal to the first preset threshold, the session management network element determines that the type of the first access network is terrestrial broadcasting; or When the third value is less than the first preset threshold, the session management network element determines that the type of the first access network is mixed-mode multicast or broadcast.

In a possible design, the QoS parameter of the first type of data includes the PDB parameter of the first type of data, and the PDB parameter of the first type of data is a fourth value; the session management network element is based on the QoS of the first type of data. Parameters to determine the first access network type, including: when the fourth value is greater than or equal to a second preset threshold, the session management network element determines that the first access network type is terrestrial broadcasting; or, when the first access network type is terrestrial broadcasting; When the four value is less than the second preset threshold, the session management network element determines that the type of the first access network is mixed mode multicast or broadcast.

In a possible design, the first access network type can be understood as the type of broadcast technology. In this case, the first access network type can include terrestrial broadcasting, or mixed-mode multicast or broadcast; or, the first access network The type can be understood as the type of wireless access technology, which can include NR technology, LTE technology, and any other type of wireless access technology; or, the first access network type can also be understood as the type of broadcast technology. Type and interface type; or, the first access network type can also be understood as the type and interface type of the wireless access technology.

In a possible design, the second access network type can be understood as the type of broadcast technology. In this case, the second access network type can include terrestrial broadcasting, or mixed-mode multicast or broadcast; or, the second access network The type can be understood as the type of wireless access technology, which can include NR technology, LTE technology, and any other type of wireless access technology; or, the second access network type can also be understood as the type of broadcast technology. Type and interface type; or, the second access network type can also be understood as the type and interface type of the wireless access technology, and the second access network type is different from the first access network type.

In the second aspect, a communication method and corresponding communication device are provided. In this solution, the access network device receives the first access network type and the first downlink address from the mobility management network element, where the first access network type is the first type of data used to transmit the first service The type of the access network, the first downlink address is the downlink address of the first type of data; the access network device sends a first message to the first user plane network element according to the first access network type, and the first The message carries the first downlink address, and the first message is used to establish a transmission path for transmitting the first type of data of the first service between the access network device and the first user plane network element. Based on this solution, on the one hand, the access network equipment only needs to provide the transmission resources required by the first type of data, which can improve the transmission quality of the first type of data and improve user experience; on the other hand, the transmission provided by the access network equipment The resources only need to ensure the transmission requirements of the first type of data, which can reduce the waste of transmission resources caused by meeting the transmission requirements of other types of data of the service at the same time; on the other hand, the access network device can transmit data according to the first downlink address. The access network device and the user plane network element establish a transmission path that is the same as the first type of data for transmitting the first service, so that the first type of data can be transmitted to the specific type of access network corresponding to the first type of data Device, and finally the first type of data is transmitted by the access network device. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

In a possible design, the access network device sends a first message to the first user plane network element according to the first access network type, including: the type of the access network device and the first access network type At the same time, the access network device sends the first message to the first user plane network element.

In a possible design, the access network device can support multiple access network types at different times, that is, the air interface of the same access network device can use multiple broadcast technologies or wireless access technologies at different times, or the same The air interface of the access network device can use multiple broadcast technologies or wireless access technologies at different times, and the access network device can use multiple interfaces at different times to communicate with the mobility management network element. In this case, that the type of the access network device is the same as the type of the first access network can be understood to mean that the type of the access network currently used by the access network device is the same as the type of the first access network.

In a possible design, the access network device can support multiple access network types at the same time, that is, the air interface of the same access network device can use multiple broadcast technologies or wireless access technologies at the same time, or the same access The air interface of the network device can use multiple broadcast technologies or wireless access technologies at the same time, and the access network device can use multiple interfaces to communicate with the mobility management network element at the same time. In this case, the access network device can use different access network types to transmit data at the same time for different sub-regions of its coverage. At this time, the type of the access network device is the same as the first access network type, which can be understood as: The access network type used by the sub-regions whose coverage area is the same as or similar to that of the first type data is the same as the first access network type.

In a possible design, the communication method provided in the embodiment of the present application further includes: the access network device receives the second downlink address and the second access network type from the mobility management network element, where the second access network The type is the type of the access network used to transmit the second type of data of the first service, and the second downlink address is the downlink address of the second type of data; the access network device sends the information to the second access network according to the second access network type. The second user plane network element sends a second message, the second message carries the second downlink address, and the second message is used to establish a second message of the first service between the access network device and the second user plane network element. The transmission path of the type data. Based on this solution, on the one hand, the access network equipment only needs to provide the transmission resources required for the second type of data, which can improve the transmission quality of the second type of data and improve the user experience; on the other hand, the transmission provided by the access network equipment The resources only need to ensure the transmission requirements of the second type of data, which can reduce the waste of transmission resources caused to meet the transmission requirements of other types of data of the service at the same time; on the other hand, the access network device can be based on the second downlink address. A transmission path for the second type of data of the first service is established between the access network device and the user plane network element. Therefore, the second type of data can be transmitted to the specific type of access network device corresponding to the second type of data, and finally The second type of data is transmitted by the access network device.

In the third aspect, a communication method and corresponding communication device are provided. In this solution, the coordination function network element receives the first downlink address and the first access network type from the mobility management network element, and sends the first download to the first access network device according to the first access network type. Row address. Wherein, the first access network type is a device of an access network used to transmit the first type of data of the first service, and the first downlink address is a downlink address of the first type of data. Based on this solution, the coordination function network element can select the corresponding first access network device to send the first downlink address according to the first access network type. On the one hand, the first access network device can only provide the first type The transmission resources required for data can further improve the transmission quality of the first type of data and improve user experience; on the other hand, the transmission resources provided by the first access network device only need to ensure the transmission requirements of the first type of data, which can reduce In order to meet the transmission requirements of other types of data of the service at the same time, the waste of transmission resources is caused; on the other hand, the first access network device can communicate between the first access network device and the first user plane network according to the first downlink address. A transmission path for transmitting the first type of data of the first service is established between the elements. Therefore, the first type of data can be transmitted to a specific type of access network device corresponding to the first type of data, and the access network is finally The device transmits the first type of data. In summary, the communication method provided in the embodiments of the present application can transmit different types of data of services more rationally and flexibly.

In a possible design, the communication method provided by the embodiment of the present application further includes: the coordination function network element receives the second downlink address and the second access network type from the mobility management network element, and performs the communication according to the second access network element. Network type, sending the second downlink address to the second access network device. Wherein, the second access network type is the type of the access network used to transmit the second type of data of the first service. Based on this solution, the coordination function network element can select the corresponding second access network device to send the second downlink address according to the second access network type. On the one hand, the second access network device can only provide the second type of data. The required transmission resources can further improve the transmission quality of the second type of data and improve the user experience; on the other hand, the transmission resources provided by the second access network device only need to ensure the transmission requirements of the second type of data, which can reduce the At the same time, it satisfies the waste of transmission resources caused by the transmission requirements of other types of data of the service; on the other hand, the second access network device can be based on the second downlink address between the second access network device and the second user plane network element. A transmission path for transmitting the second type of data of the first service is established between, and therefore, the second type of data can be transmitted to a specific type of access network device corresponding to the second type of data, and finally transmitted by the access network device The second type of data.

In a fourth aspect, a communication method and corresponding communication device are provided. In this solution, the access network device receives the first access network type and the first identification parameter from the session management network element, where the first access network type is the access network used to transmit the first type of data of the first service. The type of network access, the first identification parameter is used to identify the first type of data of the first service; the access network device receives the downlink data of the first service, when the type of the access network device is the same as the type of the first access network Same, and when the access network device recognizes that the downlink data is the first type of data according to the first identification parameter, the access network device sends the downlink data. Based on this solution, on the one hand, the access network equipment can only provide the transmission resources required by the first type of data, and then the transmission quality of the first type of data can be improved, and the user experience can be improved; on the other hand, the access network equipment can provide The transmission resources only need to ensure the transmission requirements of the first type of data, which can reduce the waste of transmission resources in order to meet the transmission requirements of other types of data of the service at the same time; on the other hand, type matching can be performed at the access network equipment And downlink data identification, so that the access network device transmits corresponding first type data. In summary, the communication method provided in the embodiments of the present application can transmit different types of data of services more rationally and flexibly.

In a possible design, the communication method provided in the embodiment of the present application further includes: the access network device receives the second access network type and the second identification parameter from the session management network element, where the second access network type Is the type of the access network used to transmit the second type of data of the first service, and the second identification parameter is used to identify the second type of data; when the type of the access network device is the same as the type of the second access network And when the access network device recognizes that the downlink data is the second type of data of the first service according to the second identification parameter, the access network device sends the downlink data. Based on this solution, on the one hand, the access network equipment can only provide the transmission resources required for the second type of data, and then the transmission quality of the second type of data can be improved, and the user experience can be improved; on the other hand, the access network equipment can provide The transmission resources only need to ensure the transmission requirements of the second type of data, which can reduce the waste of transmission resources in order to meet the transmission requirements of other types of data of the service at the same time; on the other hand, type matching can be performed at the access network equipment And downlink data identification, so that the access network device transmits the corresponding second type data.

In a fifth aspect, a communication method and corresponding communication device are provided. In this solution, the user plane network element receives the first downlink address, the first identification parameter, the second downlink address, and the second identification parameter from the session management network element, where the first downlink address is the first service The downlink address of the first type of data, the second downlink address is the downlink address of the second type of data of the first service, the first identification parameter is used to identify the first type of data, and the second identification parameter is used to identify the second type of data; The user plane network element receives the downlink data of the first service from the application function network element. When the user plane network element recognizes that the downlink data is the first type of data of the first service according to the first identification parameter, the user plane network element The network element sends the downlink data according to the first downlink address; or, when the user plane network element recognizes that the downlink data is the second type of data of the first service according to the second identification parameter, the user plane network element The downlink data is sent according to the second downlink address. Based on this solution, the user plane network element can identify the downlink data of the first service according to the identification parameters of the service. When the downlink data is the first type of data, the first access determined according to the first access network type is enabled. The network device can receive the first type of data, and the first access network device will eventually transmit the first type of data. On the one hand, the first access network device can only provide the transmission resources required for the first type of data. In turn, the transmission quality of the first type of data can be improved, and the user experience can be improved; on the other hand, the transmission resources provided by the first access network device only need to ensure the transmission requirements of the first type of data, which can reduce other requirements for satisfying the service at the same time. The waste of transmission resources caused by the transmission requirements of the type of data; when the downlink data is the second type of data, the second access network device determined according to the second access network type can receive the second type of data. The second access network device transmits the second type of data. On the one hand, the second access network device can only provide the transmission resources required for the second type of data, thereby improving the transmission quality of the second type of data and improving users. Experience; on the other hand, the transmission resources provided by the second access network device only need to guarantee the transmission requirements of the second type of data, which can reduce the waste of transmission resources caused by simultaneously satisfying the transmission requirements of other types of data of the service. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

In a possible design, the first identification parameter is a first value, and the second identification parameter is a second value; the communication method provided in this embodiment of the present application further includes: When the value of the first field is the first value, the user plane network element recognizes that the downlink data is the first type of data of the first service; or, when the first field of the first protocol frame carrying the downlink data When the value of is the second value, the user plane network element recognizes that the downlink data is the second type of data of the first service.

In a sixth aspect, a communication method and corresponding communication device are provided. In this solution, the application function network element receives the identifier and indication information of the first user plane network element from the session management network element, where the indication information is the type identifier of the first type of data of the first service, or the type identifier of the first type of data. QoS parameters; the application function network element sends the first type of data of the first service to the first user plane network element according to the identification and indication information of the first user plane network element. Based on this solution, when the application function network element subsequently sends downlink data, it can determine that the first type of data of the first service needs to be sent to the first user plane network element according to the identification and instruction information of the first user plane network element. It is sent by the first user plane network element to the access network device determined according to the first access network type, and the access network device finally transmits the first type data. On the one hand, the access network device only needs to provide the transmission resources required by the first type of data, thereby improving the transmission quality of the first type of data and improving user experience; on the other hand, the transmission provided by the access network device The resources only need to ensure the transmission requirements of the first type of data, which can reduce the waste of transmission resources in order to meet the transmission requirements of other types of data of the service at the same time. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

In a seventh aspect, a communication device is provided for implementing the above-mentioned various methods. The communication device may be the session management network element in the foregoing first aspect, or the device including the foregoing session management; or, the communication device may be the access network device in the foregoing second or fourth aspect, or may include the foregoing access network device. A device for network access equipment; or, the communication device may be the coordination function network element in the third aspect, or a device containing the coordination function network element; or, the communication device may be the user plane network in the fifth aspect Or a device including the above-mentioned user plane network element; or, the communication device may be the application function network element in the above-mentioned sixth aspect, or a device including the above application function network element. The communication device includes corresponding modules, units, or means for implementing the above methods, and the modules, units, or menas can be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above-mentioned functions.

In an eighth aspect, a communication device is provided, including: a processor, and may also include a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device can execute the instructions described in any of the above aspects. Methods. The communication device may be the session management network element in the first aspect described above, or the device including the session management described above; or, the communication device may be the access network device in the second aspect described above, or the device including the access network device described above. Device; or, the communication device may be the coordination function network element in the third aspect, or a device including the coordination function network element; or, the communication device may be the user plane network element in the fifth aspect, or include The above-mentioned user plane network element device; or, the communication device may be the application function network element in the above sixth aspect, or a device including the above application function network element.

In a ninth aspect, a communication device is provided, including: a processor; the processor is configured to couple with a memory, and after reading an instruction in the memory, execute the method according to any of the foregoing aspects according to the instruction. The communication device may be the session management network element in the foregoing first aspect, or the device including the foregoing session management; or, the communication device may be the access network device in the foregoing second or fourth aspect, or may include the foregoing access network device. A device for network access equipment; or, the communication device may be the coordination function network element in the third aspect, or a device containing the coordination function network element; or, the communication device may be the user plane network in the fifth aspect Or a device including the above-mentioned user plane network element; or, the communication device may be the application function network element in the above-mentioned sixth aspect, or a device including the above application function network element.

In a tenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores instructions that, when run on a computer, enable the computer to execute the method described in any of the above aspects.

In an eleventh aspect, a computer program product containing instructions is provided, which when run on a computer, enables the computer to execute the method described in any of the above aspects.

In a twelfth aspect, a communication device is provided (for example, the communication device may be a chip or a chip system), and the communication device includes a processor for implementing the functions involved in any of the foregoing aspects. In a possible design, the communication device further includes a memory for storing necessary program instructions and data. When the communication device is a chip system, it may be composed of chips, or may include chips and other discrete devices.

In a thirteenth aspect, a communication device is provided, including: a processor and an interface circuit, the interface circuit may be a code/data read-write interface circuit, and the interface circuit is used to receive computer-executed instructions (computer-executed instructions are stored in a memory) , May be directly read from the memory, or may pass through other devices) and transmitted to the processor; the processor is used to run the computer-executable instructions to execute the method described in any of the foregoing aspects.

Among them, the technical effects brought by any one of the seventh aspect to the thirteenth aspect can be seen in the above-mentioned first aspect, second aspect, third aspect, fourth aspect, fifth aspect, or sixth aspect. The technical effect brought by the design method will not be repeated here.

In a fourteenth aspect, a communication method is provided. The communication method includes: a session management network element determines a first access network type, and sends the first access network type to a mobility management network element, where the first access network The type is the type of the access network used to transmit the first type of data of the first service; the mobility management network element receives the first access network type and the first information from the session management network element, and sends it to the access network device The first access network type and first information; the access network device receives the first access network type and first information from the mobility management network element, and when the first information includes the first downlink address, the access network device Send a first message to the first user plane network element according to the first access network type, the first message carrying a first downlink address, and the first message is used between the access network device and the first user plane network element The first type of data transmission path for the first service is established, and the first downlink address is the downlink address of the first type of data; when the first information includes the first identification parameter, the access network device receives the downlink data of the first service, The first identification parameter is used to identify the first type of data, and when the type of the access network device is the same as the type of the first access network and the downlink data is identified as the first type of data of the first service according to the first identification parameter, send The first type of data for the first business.

In one possible design, the first access network type includes terrestrial broadcast, or mixed-mode multicast or broadcast.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element sends first information to the mobility management network element, where the first information includes the first downlink address or the first identification parameter, where , The first downlink address is a downlink address of the first type of data of the first service, and the first identification parameter is used to identify the first type of data of the first service.

In a possible design, when the first information includes the first downlink address, the communication method further includes: the session management network element sends the identification and indication information of the first user plane network element to the application function network element, the indication information It is the type identifier of the first type of data, or the QoS parameter of the first type of data.

In a possible design, the communication method further includes: the session management network element determines the second access network type, and sends the second access network type to the mobility management network element, where the second access network type It is the type of access network used to transmit the second type of data of the first service.

In a possible design, the communication method provided in the embodiment of the present application further includes: the session management network element sends second information to the mobility management network element, the second information includes a second downlink address or a second identification parameter, where: The second downlink address is a downlink address of the second type of data of the first service, and the second identification parameter is used to identify the second type of data of the first service.

In a possible design, the communication method further includes: the session management network element sending the first downlink address, the first identification parameter, the second downlink address, and the second identification parameter to the user plane network element, The first downlink address is the downlink address of the first type of data of the first service, the second downlink address is the downlink address of the second type of data of the first service, and the first identification parameter is used to identify the downlink address of the first service. The first type of data, and the second identification parameter is used to identify the second type of data of the first service.

Among them, the technical effects brought by any design method in the fourteenth aspect can be referred to the above-mentioned first aspect or second aspect or third aspect or fourth aspect or fifth aspect or sixth aspect in different design methods. The technical effect of the coming will not be repeated here.

In a fifteenth aspect, a communication system is provided. The communication system includes: a session management network element, a mobility management network element, and an access network device; the session management network element is used to determine a first access network type and provide The mobility management network element sends the first access network type, where the first access network type is the type of the access network used to transmit the first type of data of the first service; the mobility management network element is used to receive information from session management The first access network type and first information of the network element, and the first access network type and first information are sent to the access network device; the access network device is used to receive the first access network from the mobility management network element Type and first information. When the first information includes the first downlink address, the access network device is further configured to send a first message to the first user plane network element according to the first access network type, and the first message carries the first message A downlink address, the first message is used to establish a first type of data transmission path of the first service between the access network device and the first user plane network element; when the first information includes the first identification parameter, the access The network device is also used to receive downlink data. When the type of the access network device is the same as the type of the first access network and the downlink data is identified as the first type of data of the first service according to the first identification parameter, the access network device also The first type of data used to send the first service.

In a possible design, the session management network element is also used to send the first identifier and indication information of the first user plane network element to the application function network element, where the indication information is the type identifier of the first type of data, or QoS parameters of the first type of data.

In a possible design, the session management network element is also used to determine the second access network type, and send the second access network type to the mobility management network element.

In a possible design, the session management network element is also used to send second information to the mobility management network element, where the second information includes a second downlink address or a second identification parameter, where the first downlink address is The downlink address of the first type of data of the first service, and the second identification parameter is used to identify the second type of data of the first service.

In a possible design, the session management network element is further configured to send the first downlink address, the first identification parameter, the second downlink address, and the second identification parameter to the user plane network element, where , The first downlink address is the downlink address of the first type of data of the first service, the second downlink address is the downlink address of the second type of data of the first service, and the first identification parameter is used to identify the first type of data of the first service. One type of data, and the second identification parameter is used to identify the second type of data of the first service.

In a possible design, the communication system further includes: a coordination function network element configured to receive the first downlink address and the first access network type from the mobility management network element, and according to the first The access network type sends the first downlink address to the first access network device. In one possible design, the type of the first access network device is the same as the first access network type.

In a possible design, the communication system further includes: a user plane network element configured to receive a first downlink address, the first identification parameter, and a second downlink address from the session management network element And the second identification parameter; the user plane network element is also used to receive downlink data from the application function network element; when the user plane network element recognizes that the downlink data is the first service of the first service according to the first identification parameter In the case of type data, the user plane network element is also used to send the downlink data according to the first downlink address; or, when the user plane network element recognizes that the downlink data is the first service of the first service according to the second identification parameter In the case of the second type of data, the user plane network element is also used to send the downlink data according to the second downlink address.

In a possible design, the communication system further includes: an application function network element configured to receive the identification and indication information of the first user plane network element from the session management network element, where the indication information is the first user plane network element The type identifier of the first type of data, or the QoS parameter of the first type of data, the application function network element is further configured to send the first user plane network element to the first user plane network element according to the identifier of the first user plane network element and the indication information. The first type of data for the first business.

Among them, the technical effects brought by any of the design methods in the fifteenth aspect can be referred to the above-mentioned first, second, third, fourth, fifth, or sixth aspects. The technical effect of the coming will not be repeated here.

These and other aspects of the present application will be more concise and understandable in the description of the following embodiments.

Description of the drawings

Figure 1 is a schematic diagram of an existing broadcast/multicast transmission;

Figure 2 is a schematic diagram of another existing broadcast/multicast transmission;

Figure 3 is a schematic diagram of an existing multimedia broadcast multicast service architecture;

FIG. 4a is a first structural diagram of a communication system provided by an embodiment of this application;

FIG. 4b is a second structural diagram of a communication system provided by an embodiment of this application;

FIG. 4c is a third structural diagram of a communication system provided by an embodiment of this application;

FIG. 4d is a fourth structural diagram of a communication system provided by an embodiment of this application;

FIG. 5 is a schematic diagram of a possible 5G network architecture applicable to the embodiments of this application;

FIG. 6a is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 6b is a first schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 6c is a second schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 6d is a third schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 6e is a fourth schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 6f is a fifth schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 7 is a schematic diagram 1 of the interaction flow of a communication method provided by an embodiment of this application;

FIG. 8 is a schematic diagram of a process for establishing a data transmission link provided by an embodiment of the application;

FIG. 9 is a schematic diagram 2 of the interaction flow of a communication method provided by an embodiment of this application;

FIG. 10 is a third schematic diagram of the interaction process of a communication method provided by an embodiment of this application;

FIG. 11 is a fourth schematic diagram of the interaction process of a communication method provided by an embodiment of this application;

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

detailed description

In order to facilitate the understanding of the technical solutions of the embodiments of the present application, first, a brief introduction of the related technologies of the present application is given as follows.

Broadcast/Multicast:

In the network proposed by the 3rd generation partnership project (3GPP), broadcast/multicast can mean that the sender sends the same data to multiple receivers, that is, broadcast/multicast can be understood as point-to-multipoint data transmission.

For broadcast/multicast, there are two implementation schemes: one implementation scheme is shown in Figure 1. Multiple point-to-point transmission links are established on the network side, and the sender sends multiple copies of data when sending data. This implementation can be It is considered that broadcast/multicast transmission is realized by means of multiple unicasts. Another implementation scheme is shown in Figure 2. A broadcast/multicast transmission link is established on the network side. The broadcast/multicast transmission link can be shared by multiple receivers, and the sender sends only one copy of data when sending data. Copy, the network side copies the data copy and transmits it to multiple receivers.

Among them, compared with the solution shown in FIG. 1, the solution shown in FIG. 2 can save more transmission resources. When the network supports the broadcast/multicast mechanism, it is an efficient solution. However, when the network does not have network elements that support broadcast/multicast, multiple point-to-point solutions as shown in Figure 1 can also be used.

Multimedia broadcast and multicast service architecture:

The multimedia broadcast multicast service (MBMS) architecture provided in the 3GPP standard is shown in Figure 3. Point-to-multipoint transmission is realized by establishing a multicast/broadcast transmission link. Among them, universal terrestrial radio access network (UTRAN) equipment or evolved universal terrestrial radio access network (evolved universal terrestrial radio access network, E-UTRAN) equipment are network elements that transmit data, mainly used for Receive control messages from the core network, join the multicast group and assign relevant identification information, and receive the MBMS data of the core network and broadcast the MBMS data through the air interface; multimedia broadcast multicast service gateway (MBMS GW) Mainly used to allocate Internet Protocol (IP) multicast addresses, and send MBMS data to E-UTRAN or UTRAN through IP multicast; broadcast multicast service center (BM-SC) It is mainly used to encrypt and transmit MBMS data from content provider network elements to MBMS GW, and to manage multicast members. It can also be used for session management, group management, security management, etc.; content provider network elements can It is the initiator of MBMS.

Among them, the SGmb interface in Figure 3 is the reference point between the BM-SC and MBMSGW. It is mainly used to exchange control plane information. For example, in the process of session establishment/modification, the BM-SC indicates the range in which the MBMSGW needs to establish a session. , Transmission start time and other information, MBMS GW responds to BM-SC instructions, etc.; SGi-mb interface is the reference point between BM-SC and MBMS GW, mainly used to transmit MBMS data; xMB interface is BM-SC to the outside world Provides an interface for business-related functions, mainly used to establish/update services, establish/update sessions, etc.

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Among them, in the description of this application, unless otherwise specified, "/" means that the objects associated before and after are in an "or" relationship, for example, A/B can mean A or B; in this application, "and/or "It's just an association relationship that describes associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A , B can be singular or plural. Also, in the description of this application, unless otherwise specified, "plurality" means two or more than two. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple . In addition, in order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with substantially the same function and effect. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not limit the difference.

In addition, the network architecture and business scenarios described in the embodiments of this application are intended to illustrate the technical solutions of the embodiments of this application more clearly, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that With the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

As shown in FIG. 4a, a communication system 10 provided by an embodiment of this application, the communication system 10 includes a session management network element 101, a mobility management network element 102, and an access network device 103. The session management network element 101 and the mobility management network element 102 can communicate directly or through the forwarding of other devices; the mobility management network element 102 and the access network device 103 can communicate directly or through other devices. Communication is forwarded, which is not specifically limited in the embodiment of the present application.

The session management network element 101 is used to determine the first access network type, and send the first access network type to the mobility management network element 102, where the first access network type is the first access network type used to transmit the first service. The type of access network for the first type of data; the mobility management network element 102 is used to receive the first access network type and first information from the session management network element 101, and send the first access network type to the access network device 103 And first information; the access network device 103 is used to receive the first access network type and first information from the mobility management network element, and when the first information includes the first downlink address, the access network device 103 is also used to Send a first message to the first user plane network element according to the first access network type, where the first downlink address is the downlink address of the first type of data, the first message carries the first downlink address, and the first message is To establish a first type of data transmission path for transmitting the first service between the access network device 103 and the first user plane network element; when the first information includes the first identification parameter, the access network device 103 is also used for When receiving downlink data, when the type of the access network device 103 is the same as the type of the first access network and the downlink data is identified as the first type of data of the first service according to the first identification parameter, the access network device 103 is also used to send The first type of data for the first business. Among them, the specific implementation of the above solution will be described in detail in the subsequent method embodiments, and will not be repeated here.

Based on the communication system, when the first information includes the first downlink address, the access network device determined according to the first access network type can be between the access network device and the user plane network element according to the first downlink address A transmission path for the first type of data of the first service is established. Therefore, the first type of data can be transmitted to a specific type of access network device corresponding to the first type of data through the transmission path, and the access network device is ultimately transmitted by the access network device The first type of data. Alternatively, when the first information includes the first identification parameter, the access network device determined according to the first access network type may identify the downlink data according to the first identification parameter, and when the access network device recognizes that the downlink data is the first The downlink data is sent when the first type of data of the service, therefore, the type matching and downlink data identification can be performed by the access network equipment, and the type of the access network equipment is the same as the first access network type corresponding to the first type of data. In the case of matching, the access network device can transmit the first type of data.

To sum up, on the one hand, the transmission resources that the access network device needs to provide are reduced, and the transmission resources required for data of the type corresponding to the access network device can be guaranteed, thereby improving the transmission quality of this type of data and improving user experience; On the other hand, the transmission resources provided by the access network equipment only need to guarantee the transmission requirements of one type of data of the service, which can reduce the waste of transmission resources caused to meet the transmission requirements of other types of data of the service at the same time; on the other hand, The session management network element can flexibly configure the access network equipment that transmits different types of data of the service for the service according to the type of the service data. Therefore, the communication method provided by the embodiment of the present application can transmit different data of the service reasonably and flexibly.

In a possible implementation manner, as shown in FIG. 4b, the communication system 10 provided by the embodiment of the present application may further include a coordination function network element 104, where the function of the coordination function network element 104 will be described in the subsequent method embodiments. I won't repeat them here. Among them, the coordination function network element may be an independent network element in actual implementation, or may be a part of the function of the mobility management network element. When the coordination function network element is part of the functions of the mobility management network element, the interaction between the mobility management network element and the coordination function network element is the internal realization of the mobility management network element, and the interaction between the coordination function network element and the access network device can be considered It is the interaction between the mobile management network element and the access network equipment.

In another possible implementation manner, based on the communication system 10 shown in FIG. 4a or FIG. 4b, as shown in FIG. 4c, the communication system 10 provided by the embodiment of the present application may further include an application function (AF) network element 105 and the first user plane network element 106. The functions of the application function network element 105 and the first user plane network element 106 will be described in detail in the subsequent method embodiments, and will not be repeated here.

In another possible implementation manner, based on the communication system 10 shown in FIG. 4a or FIG. 4b, as shown in FIG. 4d, the communication system 10 provided in this embodiment of the present application may further include an application function network element 105 and a user plane network element. 107, where the functions of the application function network element 105 and the user plane network element 107 will be described in detail in the subsequent method embodiments, and will not be repeated here.

Optionally, the communication system 10 shown in FIG. 4a or FIG. 4b or FIG. 4c or FIG. 4d may be applied to the current fifth generation (5th generation, 5G) network, or other networks in the future, etc. This embodiment of the present application There is no specific limitation.

Exemplarily, assuming that the communication system 10 shown in FIG. 4a or FIG. 4b or FIG. 4c or FIG. 4d is applied to a current 5G network, as shown in FIG. 5, the network element or entity corresponding to the above-mentioned session management network element may be The session management function (SMF) network element in the 5G network. The network element or entity corresponding to the above-mentioned mobility management network element may be the access and mobility management function (AMF) in the 5G network. ) Network element, the network element or entity corresponding to the aforementioned user plane network element may be a user plane function (UPF) network element in the 5G network, and the network element or entity corresponding to the aforementioned coordination function network element may be a 5G network The multi-cell/multicast coordination entity (MCE) in the multi-cell/multicast coordination entity (MCE) is not specifically limited in the embodiment of the present application.

Exemplarily, the above-mentioned access network (radio access network, RAN) equipment includes, but is not limited to: next-generation base stations (gNodeB, gNB), evolved Node B (evolved Node B, eNB), and radio network control in 5G networks. Radio network controller (RNC), node B (node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB), or home node B, HNB), baseband unit (baseBand unit, BBU), transmission point (transmitting and receiving point, TRP), transmission point (TP), mobile switching center, etc.

In addition, as shown in FIG. 5, the 5G network may also include network exposure function (NEF) network elements, etc., which are not specifically limited in the embodiment of the present application.

Among them, as shown in Figure 5, the terminal device communicates with the AMF network element through the next generation network (next generation, N) 1 interface (N1 for short), and the access network device communicates with the AMF network element through the N2 interface (N2 for short). The networked device communicates with the UPF network element through the N3 interface (abbreviated as N3), the AMF network element communicates with the SMF network element through the N11 interface (abbreviated as N11), and the SMF network element communicates with the NEF network element through the N29 interface (abbreviated as N29).

Optionally, the related functions of the session management network element, the mobility management network element, the access network device, the user plane network element, the coordination function network element, or the application function network element in the embodiment of the present application can be implemented by one device, or It may be implemented by multiple devices together, or may be implemented by one or more functional modules in one device, which is not specifically limited in the embodiment of the present application. It is understandable that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or instantiated on a platform (for example, a cloud platform) Virtualization function.

For example, the related functions of the session management network element, the mobility management network element, the access network device, the user plane network element, the coordination function network element, or the application function network element in the embodiment of the method of the present application may pass through the communication device in FIG. 6a (It can also be called a communication device). Fig. 6a shows a schematic diagram of the hardware structure of a communication device provided by an embodiment of the application. The communication device 600 includes a processor 601, a communication line 602, a memory 603, and at least one communication interface (in FIG. 6a, it is only exemplary and the communication interface 604 is included as an example for illustration).

The processor 601 can be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit.

The communication line 602 may include a path to transmit information between the aforementioned components.

The communication interface 604 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .

The memory 603 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this. The memory may exist independently, and is connected to the processor through the communication line 602. The memory can also be integrated with the processor.

The memory 603 is used to store computer-executable instructions for executing the solution of the present application, and the processor 601 controls the execution. The processor 601 is configured to execute computer-executable instructions stored in the memory 603, so as to implement the communication method provided in the following embodiments of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

In a specific implementation, as an embodiment, the processor 601 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 6a.

In a specific implementation, as an embodiment, the communication device 600 may include multiple processors, such as the processor 601 and the processor 608 in FIG. 6a. Each of these processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).

In a specific implementation, as an embodiment, the communication device 600 may further include an output device 605 and an input device 606. The output device 605 communicates with the processor 601 and can display information in a variety of ways. For example, the output device 605 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait. The input device 606 communicates with the processor 601, and can receive user input in a variety of ways. For example, the input device 606 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.

The aforementioned communication device 600 may be a general-purpose device or a special-purpose device. In a specific implementation, the communication device 600 may be a desktop computer, a portable computer, a network server, a PDA (personal digital assistant, PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a similar structure in Figure 6a. equipment. The embodiment of the present application does not limit the type of the communication device 600.

The communication method provided by the embodiment of the present application will be described in detail below in conjunction with FIG. 1 to FIG. 6a.

It should be noted that the name of the message between each network element or the name of each parameter in the message in the following embodiments of the present application is just an example, and other names may also be used in specific implementations. The embodiments of the present application do not make specific details about this. limited.

In a possible implementation manner, as shown in FIG. 6b, a communication method provided in an embodiment of this application, the communication method includes the following steps:

S601a. The session management network element determines the first access network type.

Wherein, the first access network type is the type of the access network used to transmit the first type of data of the first service.

In a possible implementation manner, the first access network type can be understood as the type of broadcasting technology. In this case, the first access network type can include terrestrial broadcast, or mixed-mode multicast or broadcast. (mixed mode multicast/broadcast). Among them, when the air interface uses terrestrial broadcast technology, it only supports downlink broadcast transmission, which has a wide range of transmission and uses fixed (that is, broadcast-dedicated) resources for transmission; when the air interface uses mixed-mode multicast or broadcast technology, it transmits downlink While broadcasting data, uplink unicast data can be transmitted at the same time, its transmission coverage is small, and it uses broadcast and unicast semi-dynamic sharing (or completely dynamic sharing) resources for transmission.

Among them, the access network equipment that uses terrestrial broadcast technology at the air interface can also be called a wide area base station or macro base station or macro station; an access network that uses mixed-mode multicast or broadcast technology at the air interface The device may also be called a medium range base station or a small base station or a small station.

In another possible implementation manner, the first access network type can be understood as a type of wireless access technology, and the wireless access technology can include new radio (NR) technology or long term evolution (long term evolution). The LTE) technology and any other type of wireless access technology are not limited in the embodiment of the present application. Among them, the access network equipment using NR technology at the air interface can work in the high-frequency section, and its coverage is narrow, and the access network equipment using LTE technology at the air interface can work in the low-frequency section, and its coverage is wide, so it is understandable The application scenario when the first access network type is terrestrial broadcasting is similar to the application scenario when the first access network type is LTE, and the application scenario when the first access network type is mixed-mode multicast or broadcast. It is similar to the application scenario when the first access network type is NR.

In another possible implementation manner, the first access network type may include a type of a broadcast technology and an interface type. For the type of the broadcast technology, refer to the foregoing description. Wherein, the interface may be an interface between the access network and the core network, and the interface type may be an N2 interface or an S1 interface, which is not limited in the embodiment of the present application.

In yet another possible implementation manner, the first access network type may include a type of a radio access technology and an interface type. For the type and interface type of the radio access technology, refer to the foregoing description.

It should be noted that in the embodiments of the present application, the first access network type can also be understood as the type of access network equipment used to transmit the first type of data of the first service, and the two can be replaced with each other. , The following embodiments will not be repeated.

Among them, the first service may be MBMS, such as a live video service, or the first service may also be a vehicle to everything (V2X) data transmission service, which is not limited.

Among them, the data of the first service can be distinguished according to one or more of transmission reliability requirements, transmission delay requirements, transmission bandwidth requirements, or coverage. Specifically, it can be divided into the first type of data and the second type of data. , Or the third type of data, etc., are not restricted. For example, the first type of data of the first service may include data in the first service that requires high transmission reliability, or data that requires wide coverage, or data that requires high transmission delay, or data that requires high transmission delay. Data with lower bandwidth requirements. Optionally, data with higher requirements for transmission reliability, or data with a wider coverage area, or data with lower transmission bandwidth requirements, can also be called basic layer data (or other names); for transmission Data with higher requirements for extension, or with special requirements for coverage (such as a small area) can also be called enhancement layer data (or other names), that is, the first type of data for the first service can include The basic layer data or enhancement layer data is not specifically limited in the embodiment of the present application.

It should be noted that the basic layer data in the embodiments of the present application can also be understood as a basic frame, and the enhancement layer data can also be understood as an enhanced frame, which is described here in a unified manner, and the following embodiments will not be repeated.

S602a. The session management network element sends the first access network type to the mobility management network element.

Based on this solution, the session management network element can determine the type of access network that transmits the first type of data, and then can determine the access network device that transmits the first type of data according to the type of the access network, so that the first type of data can be transferred Transmitted to the access network device corresponding to the first type of data, and finally the first type of data is transmitted by the access network device, that is to say, the different types of data of the first service are all performed by the access network device corresponding to the data type Transmission, therefore, on the one hand, the transmission resources that the access network device needs to provide are reduced, and the transmission resources required by the type of data corresponding to the access network device can be guaranteed, thereby improving the transmission quality of this type of data and improving user experience; On the other hand, the transmission resources provided by the access network equipment only need to guarantee the transmission requirements of one type of data of the service, which can reduce the waste of transmission resources caused to meet the transmission requirements of other types of data of the service at the same time; on the other hand, The session management network element can flexibly configure the access network equipment that transmits different types of data of the service for the service according to the type of the service data. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

Optionally, in an implementation scenario of the foregoing embodiment, the session management network element may receive the type identifier of the first type of data of the first service from the application function network element, where the type identifier is used to indicate the type of the first service. The type of data, the type identification of different types of data of the first service is different. In this scenario, in the above step S601, the session management network element determines the first access network type, which may include: the type identification of the session management network element according to the first type data, and the relationship between the type identification and the access network type To determine the first access network type.

Optionally, in another implementation scenario of the foregoing embodiment, the session management network element may also receive quality of service (quality of service, QoS) parameters of the first type of data of the first service. In this scenario, in the foregoing step S601, the session management network element determining the first access network type may include: the session management network element determining the first access network type according to the QoS parameters of the first type data.

In a possible implementation, when the QoS parameter of the first type of data includes the packet error rate (PER) parameter of the first type of data, and the value of the PER parameter of the first type of data is a value of 1, The session management network element determines the first access network type according to the QoS parameters of the first type data, which may include:

When the value 1 is greater than or equal to the first preset threshold, the session management network element determines that the first access network type is terrestrial broadcasting; or, when the value 1 is less than the first preset threshold, the session management network element determines the first access The network type is mixed mode multicast/broadcast.

In another possible implementation manner, when the QoS parameter of the first type of data includes the packet delay budget (PDB) parameter of the first type of data, and the value of the PDB parameter of the first type of data is a value of 2. When the session management network element determines the type of the first access network according to the QoS parameters of the first type of data, it may include:

When the value 2 is greater than or equal to the second preset threshold, the session management network element determines that the first access network type is terrestrial broadcasting; or, when the value 2 is less than the second preset threshold, the session management network element determines the first access The network type is mixed mode multicast/broadcast.

Among them, in the embodiment of the present application, the above-mentioned value 1 may also be referred to as the third value, and the value 2 may also be referred to as the fourth value, which is not specifically limited in the embodiment of the present application.

Optionally, in another implementation scenario of the foregoing embodiment, the communication method shown in FIG. 6b further includes: the session management network element sends first information to the mobility management network element, where the first information includes the first downlink address Or the first identification parameter.

The first downlink address may be a downlink address of the first type of data of the first service. The first downstream address may be an IP multicast/multicast address. When the first type of data of the first service is subsequently sent in a multicast/multicast manner, the first downstream address may be used as a multicast/multicast address.

The first identification parameter may be used to identify the first type of data of the first service, and may include one or more of the following: a first IP address, a combination of the first IP address and the first port number, or a first value. The first IP address may be the value of the source IP address field in the first protocol frame carrying the first type of data of the first service, and the first port number may be the source port number field in the first protocol frame and/or The value of the destination port number field, the first value may be the value of the first field in the first protocol frame.

Optionally, the first protocol frame may be a real-time transport protocol (RTP) frame. In this case, the first field may be an extension field of the Additional Header (Additional Header) of the RTP protocol frame.

Based on this solution, on the one hand, when the first information includes the first downlink address, the access network device determined according to the first access network type can communicate with the access network device and the user plane network element according to the first downlink address. A transmission path for transmitting the first type of data of the first service is established between them. Therefore, the first type of data can be transmitted to a specific type of access network device corresponding to the first type of data, and finally the access network device Transmit the first type of data. On the other hand, when the first information includes the first identification parameter, the access network device determined according to the first access network type can identify the downlink data according to the first identification parameter, and when the access network device recognizes that the downlink data is The downlink data is sent when the first type of data of the first service is transmitted. Therefore, type matching and downlink data identification can be performed at the access network device, so that the specific type of access network device corresponding to the first type of data can transmit the first type of data. One type of data.

Optionally, when the first information includes the first downlink address, the communication method shown in FIG. 6b further includes: the session management network element sends the identification and indication information of the first user plane network element to the application function network element, and the indication The information is the type identifier of the first type of data, or the QoS parameter of the first type of data.

The identifier of the first user plane network element is used to identify the first user plane network element, and may include the IP address of the first user plane network element.

Based on this solution, when the application function network element subsequently sends downlink data, it can be determined according to the identifier and indication information of the first user plane network element that the first type of data of the first service needs to be sent to the first user plane network element.

Optionally, in another implementation scenario of the foregoing embodiment, the communication method shown in FIG. 6b further includes: the session management network element determines the second access network type, and sends the second access network to the mobility management network element Types of.

Wherein, the second access network type is the type of the access network used to transmit the second type of data of the first service.

Among them, the second access network type can be understood as the type of broadcast technology. In this case, the second access network type can include terrestrial broadcasting, or mixed-mode multicast or broadcast; or, the second access network type can be understood as wireless access. The type of access technology, the wireless access technology can include NR technology, LTE technology, and any other type of wireless access technology; or, the second access network type can also be understood as the type of broadcast technology and the interface type; or The second access network type can also be understood as the type of wireless access technology and the interface type. The second access network type is different from the first access network type. For related descriptions, please refer to the foregoing description, which will not be repeated here.

It should be noted that, in the embodiments of the present application, the second access network type can be understood as the type of access network equipment used to transmit the second type of data of the first service, and the two can be replaced with each other. The following embodiments will not be repeated.

Among them, the first type of data and the second type of data are different types of data of the first service. For example, when the first type of data of the first service is basic layer data in a live video service, the second type of data of the first service is Is the enhancement layer data in the same live video service; or, when the first type of data of the first service is enhancement layer data in the live video service, the second type of data of the first service is the same live video service The basic layer data in.

Optionally, the first type of data and the second type of data may also be different service data from the same data source (for example, a video server). At this time, the first service can represent a broader concept of "multicast/broadcast service". For example, if the same video server can provide both video rebroadcasting services and live video broadcasting services, the video rebroadcasting service of the video server Both the live video service and the live video service can be referred to as the first service. In this case, when the first type of data is the high-definition sports rebroadcast data of the video rebroadcast service, the second type of data is the live news data of the video live broadcast service; or, When the first type of data is live news data of the video live broadcast service, the second type of data is high-definition sports rebroadcast data of the video live broadcast service.

Based on this solution, the session management network element can determine the type of access network that transmits the second type of data, and then can determine the access network device that transmits the second type of data according to the type of the access network, so that the second type of data can be transferred It is transmitted to a specific type of access network device corresponding to the second type of data, and the access network device finally transmits the second type of data. Therefore, on the one hand, the access network device that transmits the first type of data can guarantee the first type of data. Data transmission quality, the access network equipment that transmits the second type of data can guarantee the quality of the transmission number of the second type of data, thereby further improving the user experience; on the other hand, it can be based on the transmission requirements of the first type of data and the second type of data Reasonably and flexibly choose access network equipment.

Optionally, in another implementation scenario of the foregoing embodiment, the method shown in FIG. 6b may further include: the session management network element sends second information to the mobility management network element, and the second information includes the second downlink address or the first 2. Identification parameters.

Wherein, the second downlink address may be a downlink address of the second type of data of the first service. The second downstream address may be an IP multicast/multicast address. When the second type of data of the first service is subsequently sent in a multicast/multicast manner, the second downstream address may be used as the multicast/multicast address. The second downstream address and the first downstream address are different downstream addresses.

The second identification parameter is used to identify the second type of data, and may include one or more of the following: a second IP address, a combination of a second IP address and a second port number, or a second value. The second IP address may be the value of the source IP address field in the first protocol frame carrying the second type of data of the first service, and the second port number may be the source port number field and/or in the first protocol frame The value of the destination port number field, and the second value may be the value of the first field in the first protocol frame.

Based on this solution, on the one hand, when the second information includes the second downlink address, the access network device determined according to the second access network type can be between the access network device and the user plane network element according to the second downlink address A transmission path for the second type of data of the first service is established. Therefore, the second type of data can be transmitted to a specific type of access network device corresponding to the second type of data, and the access network device ultimately transmits the second type of data . On the other hand, when the first information includes the second identification parameter, the access network device determined according to the second access network type can identify the downlink data according to the second identification parameter, and when the access network device recognizes that the downlink data is The downlink data is sent when the second type of data of the first service is transmitted. Therefore, type matching and downlink data identification can be performed at the access network equipment, so that the specific type of access network equipment corresponding to the second type of data can transmit the second type of data. One type of data.

Optionally, in another implementation scenario of the foregoing embodiment, the session management network element may receive the type identification of the second type of data from the application function network element. In this scenario, the session management network element determines the second connection. The network access type may include: the session management network element determines the second access network type according to the type identifier of the second type data and the correspondence between the type identifier and the access network type.

Optionally, in another implementation scenario of the foregoing embodiment, the session management network element may also receive QoS parameters of the second type of data. In this scenario, the above-mentioned session management network element determining the second access network type may include: the session management network element determining the second access network type according to the QoS parameters of the second type data.

In a possible implementation manner, when the QoS parameter of the second type of data includes the PER parameter of the second type of data, and the value of the PER parameter of the second type of data is 3, the session management network element is based on the second type of data The QoS parameters for determining the second access network type may include:

When the value 3 is greater than or equal to the first preset threshold, the session management network element determines that the second access network type is terrestrial broadcasting; or, when the value 3 is less than the first preset threshold, the session management network element determines the second access The network type is mixed mode multicast/broadcast.

In another possible implementation manner, when the QoS parameter of the second type of data includes the PDB parameter of the second type of data, and the value of the PDB parameter of the second type of data is 4, the session management network element The QoS parameters of the data, determining the second access network type, may include:

When the value 4 is greater than or equal to the second preset threshold, the session management network element determines that the second access network type is terrestrial broadcasting; or, when the value 4 is less than the second preset threshold, the session management network element determines the second access The network type is mixed mode multicast/broadcast.

Among them, in the embodiment of the present application, the above-mentioned value 3 may also be referred to as the first value, and the value 4 may also be referred to as the second value, which is not specifically limited in the embodiment of the present application.

Optionally, the communication method shown in FIG. 6b may further include: the session management network element sending the first downlink address, the first identification parameter, the second downlink address, and the second identification parameter to the user plane network element. The first downlink address is the downlink address of the first type of data of the first service, the second downlink address is the downlink address of the second type of data of the first service, and the first identification parameter is used to identify the first type of data of the first service. Type data. The second identification parameter is used to identify the second type of data of the first service. For related description, please refer to the foregoing description.

Optionally, the session management network element may include the first downlink address, the first identification parameter, the second downlink address, and the second identification parameter in the same message and send it to the user plane network element; or, the first downlink address, the first identification parameter, the second downlink address, and the second identification parameter may be sent to the user plane network element; A downlink address and the first identification parameter are included in one message and sent to the user plane network element, and the second downlink address and the second identification parameter are included in another message and sent to the user plane network element. There is no specific limitation.

Based on this solution, the user-plane network element can identify the downlink data according to the identification parameters of the service. When the user-plane network element recognizes that the downlink data is the first type of data of the first service according to the first identification parameter, the user-plane network element recognizes the downlink data as the first type of data of the first service according to the first download. The downlink data is sent by the row address, so that the first access network device determined according to the first access network type can receive the downlink data, so as to transmit the first type data to the first access network device corresponding to the first type data Finally, the first access network device transmits the first type of data. When the user plane network element recognizes that the downlink data is the second type of data of the first service according to the second identification parameter, the downlink data is sent according to the second downlink address, The second type of data is transmitted to the second access network device corresponding to the second type of data, and the second type of data is finally transmitted by the second access network device.

Among them, the specific implementation of the above solution will be described in detail through the interaction process between the network elements shown in FIG. 7 or FIG. 9 or FIG. 10 or FIG. 11, and related steps and terminology can be used for reference, and will not be repeated here.

As shown in FIG. 6c, another communication method provided by an embodiment of this application, the communication method includes the following steps:

S601b. The access network device receives the first access network type and the first downlink address from the mobility management network element.

For the first access network type and the first downlink address, reference may be made to the foregoing description, which will not be repeated here.

S602b. The access network device performs type matching.

Wherein, when the type of the access network device matches the type of the first access network, the following step S603b is executed.

Where the type of the access network device matches the type of the first access network, it can also be understood that the type of the access network device is the same as the type of the first access network, which is described here in a unified manner, and the following embodiments will not be repeated.

It should be noted that when the first access network type and the second access network type are understood as the type of broadcast technology, the type of the access network device is correspondingly understood as the type of broadcast technology used by the air interface of the access network device; When the first access network device and the second access network device are understood as the type of wireless access technology, the type of access network device is correspondingly understood as the type of wireless access technology used by the air interface of the access network device; When the first access network type and the second access network type are understood as the type of broadcast technology and the interface type, the type of access network equipment is correspondingly understood as the type of broadcast technology used by the air interface of the access network equipment and the access network The interface type between the device and the mobility management network element; when the first access network type and the second access network type are understood as the type of wireless access technology and the interface type, the type of the access network device is correspondingly understood as the access The type of the radio access technology used by the air interface of the network device and the interface type between the access network device and the mobility management network element are applicable to each embodiment of the present application, and are described here in a unified manner, and will not be repeated in the following.

In a possible implementation manner, the access network device in the embodiment of this application can support multiple access network types at different times, that is, the air interface of the same access network device can use multiple broadcast technologies or wireless at different times. The access technology or the air interface of the same access network device can use multiple broadcast technologies or wireless access technologies at different times, and the access network device can use multiple interfaces to communicate with the mobility management network element at different times. In this case, the type of the access network device is the same as the type of the first access network. It can be understood that the access network type currently used by the access network device is the same as the type of the first access network. The same type as the second access network type can also be understood to mean that the access network type currently used by the access network device is the same as the second access network type. This specification is applicable to each embodiment of the present application, and is explained here in a unified manner. No longer.

In another possible implementation manner, the access network device in the embodiment of the present application can support multiple access network types at the same time, that is, the air interface of the same access network device can use multiple broadcast technologies or wireless access at the same time. Access technology, or the air interface of the same access network device can use multiple broadcast technologies or wireless access technologies at the same time, and the access network device can use multiple interfaces to communicate with the mobility management network element at the same time. In this case, the access network device can use different access network types to transmit data at the same time for different sub-regions of its coverage. At this time, the type of the access network device is the same as the first access network type, which can be understood as: The coverage area is the same as or similar to the coverage area of the first type of data. The access network type used in the sub-area is the same as the first access network type. Similarly, the type of access network equipment is the same as the second access network type, which can be understood as , The access network type used by the sub-regions whose coverage is the same or similar to that of the second type of data is the same as the second access network type.

S603b. The access network device sends a first message to the first user plane network element.

The first message carries a first downlink address, and the first message is used to establish a transmission path for transmitting the first type of data of the first service between the access network device and the first user plane network element.

Steps S602b and S603b can also be understood as that the access network device sends a first message to the first user plane network element according to the first access network type, that is, the access network device sends the first message to the first user plane network element according to the first access network type. The user plane network element sending the first message includes: when the type of the access network device is the same as the first access network type, the access network device sends the first message to the first user plane network element.

Based on this solution, on the one hand, the access network equipment only needs to provide the transmission resources required by the first type of data, which can improve the transmission quality of the first type of data and improve user experience; on the other hand, the transmission provided by the access network equipment The resources only need to ensure the transmission requirements of the first type of data, which can reduce the waste of transmission resources caused by meeting the transmission requirements of other types of data of the service at the same time; on the other hand, the access network device can transmit data according to the first downlink address. A transmission path for transmitting the first type of data of the first service is established between the access network device and the user plane network element. Therefore, the first type of data can be transmitted to a specific type of access corresponding to the first type of data. Network equipment, and finally the first type of data is transmitted by the access network equipment. In summary, the communication method provided in the embodiments of the present application can transmit different types of data of services more rationally and flexibly.

Optionally, in an implementation scenario of the foregoing embodiment, the communication method shown in FIG. 6c may further include: the access network device receives the second access network type and the second downlink address from the mobility management network element. According to the second access network type, the access network device sends a second message to the second user plane network element. The second message carries a second downlink address. The second message is used to communicate between the access network device and the second user plane. A transmission path for transmitting the second type of data of the first service is established between the network elements. For the second access network type and the second downlink address, reference may be made to the foregoing description, which will not be repeated here.

Based on this solution, on the one hand, the access network equipment only needs to provide the transmission resources required for the second type of data, which can improve the transmission quality of the second type of data and improve the user experience; on the other hand, the transmission provided by the access network equipment The resources only need to ensure the transmission requirements of the second type of data, which can reduce the waste of transmission resources caused to meet the transmission requirements of other types of data of the service at the same time; on the other hand, the access network device can be based on the second downlink address. A transmission path for the second type of data of the first service is established between the access network device and the user plane network element. Therefore, the second type of data can be transmitted to the access network device corresponding to the second type of data. The network-connected device transmits the second type of data.

As shown in FIG. 6d, another communication method provided by an embodiment of this application, the communication method includes the following steps:

S601c. The access network device receives the first access network type and the first identification parameter from the session management network element.

Among them, the first access network type and the first identification parameter can refer to the foregoing description, which will not be repeated here.

S602c. The access network device receives downlink data of the first service.

S603c. The access network device performs type matching and identification of the downlink data.

Wherein, when the type of the access network device matches the type of the first access network, and the access network device recognizes that the downlink data is the first type of data of the first service according to the first identification parameter, the following step S604c is performed.

S604c. The access network device sends the downlink data.

Based on this solution, on the one hand, the access network equipment can only provide the transmission resources required by the first type of data, and then the transmission quality of the first type of data can be improved, and the user experience can be improved; on the other hand, the access network equipment can provide The transmission resources only need to ensure the transmission requirements of the first type of data, which can reduce the waste of transmission resources in order to meet the transmission requirements of other types of data of the service at the same time; on the other hand, type matching can be performed at the access network equipment And downlink data identification, so that the access network device transmits corresponding first type data. In summary, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

Optionally, in an implementation scenario of the foregoing embodiment, the communication method shown in FIG. 6d may further include: the access network device receives the second access network type and the second identification parameter from the session management network element. When the type of the access network device matches the type of the second access network, and the access network device recognizes according to the second identification parameter that the downlink data in step S602c is the second type of data of the first service, the access network device For sending the downlink data, for the second access network type and the second identification parameter, reference may be made to the foregoing description, which will not be repeated here.

Based on this solution, on the one hand, the access network equipment can only provide the transmission resources required for the second type of data, and then the transmission quality of the second type of data can be improved, and the user experience can be improved; on the other hand, the access network equipment can provide The transmission resources only need to ensure the transmission requirements of the second type of data, which can reduce the waste of transmission resources in order to meet the transmission requirements of other types of data of the service at the same time; on the other hand, the access network equipment can perform type matching and Downlink data identification, so that the access network device transmits the corresponding second type data.

As shown in FIG. 6e, another communication method provided by an embodiment of this application, the communication method includes the following steps:

S601d. The user plane network element receives a first downlink address, a first identification parameter, a second downlink address, and a second identification parameter from the session management network element.

Among them, the first downstream address, the first identification parameter, the second downstream address, and the second identification parameter can refer to the foregoing description, and will not be repeated here.

S602d. The user plane network element receives the downlink data of the first service from the application function network element.

S603d. The user plane network element recognizes the downlink data of the first service.

Optionally, when the above-mentioned first identification parameter is a first value, and the second identification parameter is a second value, the user plane network element identifying the downlink data may include: When the value of the field is the first value, the user plane network element recognizes that the downlink data is the first type of data of the first service; or, when the value of the first field of the first protocol frame carrying the downlink data is the second value At this time, the user plane network element recognizes that the downlink data is the second type of data of the first service.

Wherein, when the user plane network element recognizes that the downlink data is the first type of data of the first service according to the first identification parameter, the following step S604d is executed; or, when the user plane network element recognizes the downlink data according to the second identification parameter When it is the second type of data of the first service, the following step S605d is executed.

S604d. The user plane network element sends the downlink data according to the first downlink address.

S605d. The user plane network element sends the downlink data according to the second downlink address.

Based on this solution, the user plane network element can identify the downlink data of the first service according to the identification parameters of the service. When the downlink data is the first type of data, the first access determined according to the first access network type is enabled. The network device can receive the first type of data, and the first access network device will eventually transmit the first type of data. On the one hand, the first access network device can only provide the transmission resources required for the first type of data. In turn, the transmission quality of the first type of data can be improved, and the user experience can be improved; on the other hand, the transmission resources provided by the first access network device only need to ensure the transmission requirements of the first type of data, which can reduce other requirements for satisfying the service at the same time. The waste of transmission resources caused by the transmission requirements of the type of data; when the downlink data is the second type of data, the second access network device determined according to the second access network type can receive the second type of data. The second access network device transmits the second type of data. On the one hand, the second access network device can only provide the transmission resources required for the second type of data, thereby improving the transmission quality of the second type of data and improving users. Experience; on the other hand, the transmission resources provided by the second access network device only need to guarantee the transmission requirements of the second type of data, which can reduce the waste of transmission resources caused by simultaneously satisfying the transmission requirements of other types of data of the service. Therefore, the communication method provided by this application embodiment can transmit different types of data of the service more reasonably and flexibly.

As shown in FIG. 6f, another communication method provided by this embodiment of the application, the communication method includes the following steps:

S601e. The application function network element receives the identification and indication information of the first user plane network element from the session management network element.

Wherein, the indication information is the type identifier of the first type of data of the first service or the QoS parameter of the first type of data of the first service.

S602e. The application function network element sends the first type of data of the first service to the first user plane network element according to the identification and indication information of the first user plane network element.

Based on this solution, when the application function network element subsequently sends downlink data, it can determine that the first type of data of the first service needs to be sent to the first user plane network element according to the identification and instruction information of the first user plane network element. It is sent by the first user plane network element to the access network device determined according to the first access network type, and the access network device finally transmits the first type data. On the one hand, the access network device only needs to provide the transmission resources required by the first type of data, thereby improving the transmission quality of the first type of data and improving user experience; on the other hand, the transmission provided by the access network device The resources only need to ensure the transmission requirements of the first type of data, which can reduce the waste of transmission resources in order to meet the transmission requirements of other types of data of the service at the same time. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

The foregoing method embodiment introduces the communication method provided by the present application from the side of each network element, and the communication method provided by the present application is described in detail below in the manner of interaction between network elements.

The communication system shown in Figure 4a or Figure 4b or Figure 4c or Figure 4d is applied to the 5G network shown in Figure 5, the session management network element is the SMF network element, the mobility management network element is the AMF network element, and the coordination function network element It is an MCE, and the user plane network element is a UPF network element as an example. As shown in FIG. 7, a communication method provided in an embodiment of this application is provided. The communication method includes the following steps:

S701. The AF network element sends a multicast session establishment request message 1 to the SMF network element.

Correspondingly, the SMF network element receives the multicast session establishment request message 1 sent by the AF network element.

Optionally, the AF network element may directly send the multicast session establishment request message 1 to the SMF network element, or may send the multicast session establishment request message 1 to the NEF network element first, and the NEF network element will The multicast session establishment request message 1 is authenticated, and after the authentication is successful, the NEF network element sends the multicast session establishment request message 1 to the SMF network element.

Wherein, the multicast session establishment request message 1 may be used to request the establishment of a multicast session for transmitting the first type of data of the first service. For the first service and the first type of data, reference may be made to the foregoing description, which will not be repeated here.

Optionally, the multicast session establishment request message 1 may carry the type identification of the first type of data of the first service, or may also carry the transmission reliability requirements and/or transmission delay requirements of the first type of data of the first service , Where the transmission reliability requirement of the first type of data of the first service indicates the maximum allowable failure rate when transmitting the first type of data of the first service, and the transmission delay requirement of the first type of data of the first service indicates the transmission of the first type of data. The maximum time delay allowed for the first type of service data.

Optionally, the transmission reliability requirement of the first type of data of the first service may be indicated by a QoS parameter. For example, a PER parameter may be carried in the multicast session establishment request message 1 to indicate the first type of the first service Data transmission reliability requirements, or the index corresponding to the PER parameter carried in the multicast session establishment request message 1 (for example, 5G QoS Identifier (5QI)), the SMF network element receives the first type of the first service After the index corresponding to the PER parameter of the data, the corresponding PER parameter can be determined according to the index.

Or, optionally, the transmission reliability requirement of the first type of data of the first service may also be indicated by indication information. For example, in the multicast session establishment request message 1, a different value of 1 bit may be used to indicate the first The transmission reliability requirements of the first type of data. For example, when the value of the 1 bit is 1, the transmission reliability requirements of the first type of data of the first service are higher, and the first type of data of the first service needs to be reliably transmitted When the value of the 1 bit is 0, it indicates that the transmission reliability requirement of the first type of data of the first service is low, and the first type of data of the first service does not need to be reliably transmitted.

Optionally, when the transmission reliability requirement of the first type of data of the first service is indicated by indication information, the SMF network element may save the first maximum failure rate and the second maximum failure rate in advance, and when the indication information indicates the first When the first type of data of the service needs to be reliably transmitted, the SMF network element determines the first maximum failure rate as the maximum allowable failure rate of the first type of data of the first service of the first service when the first type of data is reliably transmitted, when the indication information When the first type of data indicating the first service of the first service does not need to be reliably transmitted, the SMF network element determines the second maximum failure rate as the maximum allowable failure rate of the first type of data transmission of the first service of the first service .

Optionally, the transmission delay requirement of the first type of data of the first service may also be indicated by QoS parameters. For example, the PDB parameter may be carried in the multicast session establishment request message 1 to indicate the first service of the first service. The transmission delay requirement of the type data, or the index corresponding to the PDB parameter (for example, 5QI) is carried in the multicast session establishment request message 1. After the SMF network element receives the index corresponding to the PDB parameter of the first type of data of the first service, The corresponding PDB parameter can be determined according to the index.

Or, optionally, the transmission delay requirement of the first type of data of the first service may also be indicated by indication information. For example, in the multicast session establishment request message 1, a different value of 1 bit may be used to indicate the first The delay transmission requirement of the first type of data of a service. For example, when the value of this 1 bit is 1, it means that the transmission delay requirement of the first type of data of the first service is relatively high. The first type of data needs to be transmitted with a low delay. When the value of this 1 bit is 0, it means that the transmission delay requirement of the first type of data of the first service is low, and the first type of data of the first service does not need to be transmitted. Low-latency transmission.

Optionally, when the transmission delay requirement of the first type of data of the first service is indicated by the indication information, the SMF network element may save the first transmission delay and the second transmission delay in advance, and when the indication information indicates the first transmission delay When the first type of service data needs to be transmitted with a low delay, the SMF network element determines the first transmission delay as the maximum delay allowed during the low-latency transmission of the first type of data of the first service. When the indication information indicates When the first type of data of the first service does not need to be transmitted with a low delay, the SMF network element determines the second transmission delay as the maximum allowable delay in the transmission of the first type of data of the first service.

Optionally, the multicast session establishment request message 1 may also carry the geographic area information of the multicast session established by the multicast session establishment request message 1, which can be understood as carrying the first geographic area information of the first service. The first geographic area information is used to indicate the coverage area of the first type of data of the first service.

S702. The SMF network element determines the first access network type.

Optionally, according to the different content carried in the multicast session establishment request message 1, the SMF network element determines the type of the first access network in a different manner. Illustratively, there may be the following two situations:

Case 1: The multicast session establishment request message 1 carries the type identifier of the first type of data of the first service.

Optionally, in this case 1, the SMF network element determines the type of the first access network, including: the type identification of the SMF network element according to the first type of data of the first service, and one of the type identification and the access network type The corresponding relationship between the two determines the first access network type.

Optionally, in this case 1, the SMF network element may pre-store the corresponding relationship between the type identifier and the access network type. When the type identifier of the first type of data of the first service is received, the SMF network element The access network type corresponding to the type identifier of the first type of data of the first service may be searched in the correspondence relationship according to the type identifier of the first type of data of the first service. Exemplarily, the corresponding relationship between the type identifier saved by the SMF network element and the access network type may be shown in the following Table 1. When the first type of data of the first service carried in the multicast session establishment request message 1 is When the type identifier is identifier 1, the SMF network element determines that the first access network type is terrestrial broadcast; or, when the type identifier of the first type of data of the first service carried in the multicast session establishment request message 1 is identifier 2, The SMF network element determines that the first access network type is mixed mode multicast/broadcast.

Table 1

类型标识Type identification	接入网类型Access network type

标识1Logo 1	陆地广播 Terrestrial broadcasting

标识2Logo 2	混合模式多播/广播Mixed mode multicast/broadcast

Case 2: The multicast session establishment request message 1 carries the transmission reliability requirements and/or transmission delay requirements of the first type of data of the first service.

Optionally, in the second case, the SMF network element determines the first access network type, including: the SMF network element determines the first access network type according to the transmission reliability requirements and/or transmission delay requirements of the first type of data of the first service. A type of access network.

It should be noted that in the second case, the SMF network element can determine the first access network type only according to the transmission reliability requirements of the first type data or the transmission delay requirements of the first type data, or it can also be combined with the first type. The data transmission reliability requirements and the transmission delay requirements of the first type data determine the first access network type. In the embodiment of this application, the SMF network element only requires the transmission of the first type data according to the transmission reliability of the first type data. The extension requires the determination of the first access network type as an example for description.

Optionally, when the SMF network element determines the first access network type only according to the transmission reliability requirements of the first type data or the transmission delay requirements of the first type data, the following four scenarios may exist:

① The SMF network element determines the first access network type according to the transmission reliability requirements of the first type of data of the first service. The transmission reliability requirements of the first type of data are indicated by the PER parameter, and the value of the PER parameter is 1 Or, the transmission reliability requirement of the first type of data is indicated by the index corresponding to the PER parameter, and the SMF network element can determine the value of the PER parameter of the first type of data to be 1 according to the index.

In this scenario ①, the SMF network element determines the first access network type according to the transmission reliability requirements of the first type of data of the first service, which may include: when the value 1 is greater than or equal to the first preset threshold, the SMF network The element determines that the first access network type is terrestrial broadcasting; or, when the value 1 is less than the first preset threshold, the SMF network element determines that the first access network type is mixed-mode multicast/broadcast.

Optionally, when the value 1 is equal to the first preset threshold, the SMF network element may also determine the first access network type according to the load of the wide area base station and the medium range base station. For example, when the load of the wide area base station is small, The first access network type is determined to be terrestrial broadcasting; alternatively, the SMF network element may determine the number of basic layer data session establishment requests and enhancement layer data session establishment requests received by the SMF network element within a period of time before the current moment. An access network type. For example, when the number of session establishment requests for basic layer service data received by the SMF network element is small, the first access network type is determined to be terrestrial broadcasting; or, the SMF network element can be based on the number of The first geographic area information carried in the session establishment request message 1 determines the first access network type; or the SMF network element determines according to the network configuration that the value 1 is equal to the first preset threshold, and the first access network type is equal to the value 1. When it is greater than the first preset threshold, the access network types are the same.

Among them, in the embodiment of the present application, the above-mentioned value 1 may also be referred to as the third value, which is not specifically limited in the embodiment of the present application.

② The SMF network element determines the first access network type according to the transmission reliability requirement of the first type of data of the first service, and the transmission reliability requirement of the first type of data is indicated by bit 1 in the multicast session establishment request message 1.

In this scenario ②, if the value of bit 1 is 1, it indicates that the transmission reliability of the first type of data of the first service is relatively high, and the value of bit 1 is 0, which indicates the first type of the first service. If the data transmission reliability requirement is low, the SMF network element determines the first access network type according to the transmission reliability requirement of the first type of data of the first service, including: the SMF network element determines according to the corresponding relationship in Table 2 below The first access network type, that is, when the value of bit 1 is 1, the SMF network element determines that the first access network type is terrestrial broadcasting; or, when the value of bit 1 is 0, the SMF network element determines The first access network type is mixed mode multicast/broadcast.

Table 2

比特1取值 Bit 1 value	接入网类型 Access network type
11	陆地广播Terrestrial broadcasting
00	混合模式多播/广播Mixed mode multicast/broadcast

③The SMF network element determines the first access network type according to the transmission delay requirement of the first type of data of the first service. The transmission delay requirement of the first type of data is indicated by the PDB parameter, and the value of the PDB parameter is 2 Or, the transmission delay requirement of the first type of data is indicated by the index corresponding to the PDB parameter, and the SMF network element may determine the value of the PDB parameter of the first type of data according to the index.

In this scenario ③, the SMF network element determines the first access network type according to the transmission delay requirements of the first type of data of the first service, which may include: when the value 2 is greater than or equal to the second preset threshold, the SMF network The element determines that the first access network type is terrestrial broadcasting; or, when the value 2 is less than the second preset threshold, the SMF network element determines that the first access network type is mixed-mode multicast/broadcast.

Optionally, when the value 2 is equal to the second preset threshold, the SMF network element may also be based on the load of the wide area base station and the medium-range base station, and the basic layer service data session received by the SMF network element within a period of time before the current moment. The number of establishment requests and enhancement layer service data session establishment requests, the first geographic area information carried in the multicast session establishment request message 1, or the network configuration determines that the first access network type is terrestrial broadcast or mixed-mode multicast /Broadcast. For related description, please refer to the above scene ①, which will not be repeated here.

Among them, in the embodiment of the present application, the above-mentioned value 2 may also be referred to as the fourth value, which is not specifically limited in the embodiment of the present application.

④ The SMF network element determines the first access network type according to the transmission delay requirement of the first type of data of the first service, and the transmission delay requirement of the first type of data is indicated by bit 2 in the multicast session establishment request message 1.

In this scenario ④, if the value of bit 2 is 1, it indicates that the transmission delay requirement of the first type of data is high, and the value of bit 2 is 0, which indicates that the transmission delay requirement of the first type of data is low. , The SMF network element determines the first access network type according to the transmission delay requirements of the first type of data, including: the SMF network element determines the first access network type according to the corresponding relationship in Table 3 below, that is, when the bit 2 When the value of is 1, the SMF network element determines that the first access network type is mixed-mode multicast/broadcast; or, when the value of bit 2 is 0, the SMF network element determines that the first access network type is terrestrial broadcast.

table 3

比特2取值 Bit 2 value	接入网类型 Access network type
11	混合模式多播/广播Mixed mode multicast/broadcast
00	陆地广播Terrestrial broadcasting

Optionally, in this step S702, the SMF network element may also allocate a first downlink address for the first service. For the related description of the first downlink address, reference may be made to the foregoing description, which will not be repeated here.

S703: The SMF network element sends a multicast session establishment request message 2 to the AMF network element.

Correspondingly, the AMF network element receives the multicast session establishment request message 2 from the SMF network element.

Optionally, the SMF network element may send a multicast session establishment request message 2 to the AMF network element serving the first geographical area according to the first geographic area information carried in the multicast session establishment request message 1.

Wherein, the multicast session establishment request message 2 carries the first access network type, the first downlink address, and the above-mentioned first geographic area information. At this time, the first geographic area information can be used in the AMF network in the subsequent step. Yuan or MCE selects RAN equipment.

Optionally, after the AMF network element receives the multicast session establishment request message 2, it may perform the following step S704a or the following step S704b.

S704a. The AMF network element sends the multicast session establishment request message 2 to the RAN device. Correspondingly, the RAN device receives the multicast session establishment request message 2 from the AMF network element.

Optionally, after the AMF network element receives the multicast session establishment request message 2 from the SMF network element, it can forward the multicast session establishment request message 2 to all RAN devices connected to it; or, the AMF network element can forward the multicast session establishment request message 2 according to the above-mentioned first Geographical area information, forward the multicast session establishment request message 2 to all RAN devices that can cover the first geographic area.

S704b. The AMF network element sends the multicast session establishment request message 2 to the MCE. Correspondingly, the MCE receives the multicast session establishment request message 2 sent from the AMF network element.

Optionally, after the AMF network element receives the multicast session establishment request message 2 from the SMF network element, it may serve the first geographic area (or the first geographic area) according to the service range of the MCE and the first geographic area information. The MCE of a partial area included in a geographic area forwards the multicast session establishment request message 2.

Optionally, after receiving the multicast session establishment request message 2, the MCE executes the following step S704c.

S704c. The MCE sends a multicast session establishment request message 3 to the RAN device according to the first access network type. Correspondingly, the RAN device receives the multicast session establishment request message 3 from the MCE.

Wherein, the multicast session establishment request message 3 carries the first downlink address.

Optionally, after the MCE receives the multicast session establishment request message 2 from the AMF network element, it can select all RAN devices that can cover the first geographical area based on the first geographical area information, and then can cover the first geographical area. Among all RAN devices in the geographic area, a RAN device of the same type as the first access network is selected, and the multicast session establishment request message 3 is sent to the RAN device.

Optionally, if the RAN device receives the multicast session establishment request message 2 from the AMF network element, the RAN device performs the following steps S705a-S706; or, if the RAN device receives the multicast session establishment request message 3 from the MCE, Then the RAN device executes the following steps S705b-S706.

S705a. The RAN device determines that the type of the RAN device is the same as the type of the first access network.

Optionally, after receiving the multicast session establishment request message 2 from the AMF network element, the RAN device may first determine whether the first geographic area information carried in the multicast session establishment request message 2 is the same as the location information of the RAN device When the first geographic area information is the same as the location information of the RAN device, it is further determined whether the type of the RAN device is the same as the type of the first access network. In the embodiment of the present application, the type of the RAN device is the same as that of the first access network. Take the same network access type as an example.

Optionally, when the type of the RAN device is the same as the type of the first access network, the following step S705b is performed. When the type of the RAN device is different from the type of the first access network, the RAN device does not initiate a data transmission path establishment process .

S705b. The RAN device initiates a process of establishing a transmission path for the first type of data of the first service.

Optionally, the RAN device may send a message a to the UPF network element 1 used to transmit the first type of data of the first service. The destination address of the message a is the IP address of the UPF network element 1, and the message a carries the first type of data. Downlink address, the message a is used to establish a transmission path for transmitting the first type of data of the first service between the RAN device and the UPF network element 1. Optionally, the IP address of the UPF network element 1 may be sent by the SMF network element to the RAN device through the AMF network element or through the AMF network element and the MCE.

Exemplarily, take Internet group management protocol (internet group management protocol, IGMP) version 3 (version 3, v3) as an example, where it is assumed that the first downstream address is the IP multicast address 232.2.2.2, and the multicast source is With the IP address 10.1.1.1 of UPF network element 1, the process of establishing a transmission path for the first type of data can be shown in Figure 8: the RAN device sends a message a (shown by a dotted line in Figure 8) to the next hop routing device E, so that The routing device E forwards the message a to the UPF network element 1, where the destination address of the message a is the multicast source 10.1.1.1, and the message a carries the first downstream address 232.2.2. After the routing device E receives the message a from the RAN device from the E2 interface, it stores the mapping relationship between the port receiving the message a and the first downlink address carried in the message a. Illustratively, the corresponding relationship stored by the routing device E may be As shown in Table 4. In addition, the routing device E also forwards the message a according to the destination address of the message a and the locally stored routing table.

Exemplarily, suppose that part of the content of the routing table stored by routing device E is shown in Table 5 below. After routing device E receives a message a with a destination address of 10.1.1.1, it compares the destination address with Table 5 according to the "longest match principle". Each entry in is routed matching. Since 10.1.1.1 belongs to the 10.1.0.0/16 network segment and 10.1.1.0/24 network segment, it can be seen from Table 5 that the message a can be forwarded by the E0 interface or the E1 interface, but because of 10.1. The 1.0/24 network segment has the longest number of bits matching the target address 10.1.1.1 from left to right. Therefore, the routing device E finally selects the E0 interface corresponding to the 10.1.1.0/24 network segment, according to the next hop address corresponding to the E0 interface The message a is forwarded to the routing device B.

Optionally, after receiving the message a, the routing device B continues to store the mapping relationship between the port receiving the message a and the first downlink address carried in the message a according to the above method, and forwards the message a until the message a reaches the UPF network element 1. So far, each routing device on the forwarding path of the message a has stored a mapping relationship similar to Table 4, and the first type of data of the first service between the RAN device and the UPF network element 1. After the transmission path is established, when the UPF network element 1 needs to send the first type of data of the first service to the RAN device, each routing device on the path can change the first type of data of the first service according to the stored mapping relationship similar to Table 4. The type data is forwarded by UPF network element 1 to the RAN equipment.

Table 4

组播地址Multicast address	下一跳地址Next hop address	接口interface
232.2.2.2232.2.2.2	RAN设备的网段Network segment of RAN equipment	E2E2

table 5

目的地址Destination address	子网掩码Subnet mask	下一跳地址Next hop address	接口interface
10.1.1.010.1.1.0	24twenty four	路由设备B的网段Network segment of routing device B	E0E0
10.1.0.010.1.0.0	1616	路由设备D的网段Network segment of routing device D	E1E1

Among them, in this embodiment, message a can also be referred to as the first message; UPF network element 1 can also be referred to as the first UPF network element, and UPF network element 1 does not limit the number of UPF network elements, that is, UPF network element 1 may be one or more UPF network elements, which are described here in a unified manner, and the details are not repeated in the following embodiments.

S706. The RAN device sends a multicast session establishment response message 1 to the SMF network element through the AMF network element.

Correspondingly, the SMF network element receives the multicast session establishment response message 1 sent by the RAN device through the AMF network element.

S707. The SMF network element sends an N4 session establishment request message to the UPF network element 1. Correspondingly, the UPF network element 1 receives the N4 session establishment request message from the SMF network element.

Wherein, the N4 session establishment request message carries the first downlink address.

Optionally, the SMF network element may send a request message to the network function repository function (NRF) network element, and the request message carries the first geographic area information in the multicast session establishment request message 1. The NRF network element After receiving the request message, it returns the information of the UPF network element serving the first geographic area. After receiving the information of the UPF network element returned by the NRF network element, the SMF network element determines the UPF network element as UPF network element 1. And send the N4 session establishment request message to UPF network element 1. Alternatively, the SMF network element may select the service area as the first geographic location in the multicast session establishment request message 1 according to the pre-configured mapping relationship between the UPF network element and the service area. The UPF network element in the area serves as the UPF network element 1, and sends the N4 session establishment request message to the UPF network element 1.

Optionally, after the UPF network element 1 receives the N4 session establishment request message, it stores the first downlink address, and subsequently uses the first downlink address when receiving the first type of data of the first service from the AF network element For the multicast/multicast address, the first type of data of the first service is sent in a multicast/multicast manner.

S708. The SMF network element sends a multicast session establishment response message 2 to the AF network element.

Correspondingly, the AF network element receives the multicast session establishment response message 2 from the SMF network element.

Wherein, the multicast session establishment response message 2 carries the identifier and indication information of the UPF network element 1.

Optionally, the identifier of UPF network element 1 may be the IP address of UPF network element 1, or the identifier and port number of UPF network element 1. The indication information is the type identifier of the first type of data of the first service or the first type of data. QoS parameters of the first type of service data.

Optionally, after the AF network element receives the multicast session establishment response message 2, it can save the corresponding relationship between the identifier of the UPF network element 1 and the indication information, and subsequently when sending downlink data, the first service can be determined according to the corresponding relationship. The first type of data needs to be sent to UPF network element 1.

In the embodiment of this application, the SMF network element can determine the first access network type, so that the RAN device of the same type as the first access network can establish the first access network between the RAN device and the UPF network element 1 according to the first downlink address. A transmission path of the first type of data of a service; in addition, the AF network element can determine that the first type of data of the first service needs to be sent to the UPF network element 1 according to the identifier and indication information of the UPF network element 1 sent by the SMF network element. That is, the first type data of the first service can be sent by the AF network element to the UPF network element 1, and then transmitted to the type and the first connection through the first type data transmission path of the first service between the UPF network element 1 and the RAN device. The RAN devices with the same network access type are finally transmitted by the RAN device to the terminal.

Based on this solution, the session management network element can determine the type of the access network that transmits the first type of data of the first service, and then can determine the access network device that transmits the first type of data according to the type of the access network, so that the The first type of data is transmitted to the access network device corresponding to the first type of data, and the first type of data is finally transmitted by the access network device. That is to say, the different types of data of the first service are all connected to the corresponding data type. The access network equipment performs transmission. Therefore, on the one hand, the transmission resources that the access network equipment needs to provide are reduced, and the transmission resources required by the type of data corresponding to the access network equipment can be guaranteed, thereby improving the transmission quality of this type of data. Improve the user experience; on the other hand, the transmission resources provided by the access network equipment only need to guarantee the transmission requirements of one type of data of the service, which can reduce the waste of transmission resources in order to meet the transmission requirements of other types of data of the service at the same time; On the other hand, the session management network element can flexibly configure the access network equipment that transmits different types of data of the service for the service according to the type of the service data. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

Among them, the actions of the AF network element, NEF network element, UPF network element 1, SMF network element, AMF network element, MCE or RAN device in the foregoing steps S701 to S708 may be performed by the processor in the communication device 600 shown in FIG. 6a. 601 calls the application code stored in the memory 603 to execute, and this embodiment does not impose any limitation on this.

The communication system shown in Figure 4a or Figure 4b or Figure 4c or Figure 4d is applied to the 5G network shown in Figure 5, the session management network element is the SMF network element, the mobility management network element is the AMF network element, and the coordination function network element It is an MCE, and the user plane network element is a UPF network element as an example. As shown in FIG. 9, another communication method provided by an embodiment of this application is provided. The communication method includes the following steps:

S901. The AF network element sends a multicast session establishment request message 1 to the SMF network element.

Optionally, the AF network element directly sends the multicast session establishment request message 1 to the SMF network element, or the multicast session establishment request message 1 may be sent to the NEF network element first, and the NEF network element sends the multicast session establishment request message 1 to the SMF network element. The multicast session establishment request message 1 is used for authentication, and after the authentication is successful, the NEF network element sends the multicast session establishment request message 1 to the SMF network element.

Wherein, the multicast session establishment request message 1 may be used to request the establishment of a multicast session for transmitting the first type of data of the first service and the second type of data for transmitting the first service. The first service, the first type of data, and the second type of data are transmitted. For type data, please refer to the foregoing description, which will not be repeated here.

Optionally, the multicast session establishment request message 1 may carry the type identification of the first type of data of the first service and the type identification of the second type of data of the first service, or may also carry the transmission reliability of the first type of data Requirements and/or transmission delay requirements, and transmission reliability requirements and/or transmission delay requirements of the second type of data.

Among them, the type identification of the first type of data of the first service, the transmission reliability requirement and/or the transmission delay requirement of the first type of data of the first service, and how the multicast session establishment request message 1 carries the first service of the first service For the related description of the transmission reliability requirement and/or transmission delay requirement of a type of data, please refer to the above step S701, which will not be repeated here.

Among them, the transmission reliability requirement of the second type of data of the first service indicates the maximum failure rate allowed when transmitting the second type of data of the first service, and the transmission delay requirement of the second type of data of the first service indicates the transmission of the first service The maximum delay allowed for the second type of data in the multicast session establishment request message 1 carries the transmission reliability requirements and/or transmission delay requirements of the second type of data of the first service in a manner similar to the multicast session in step S701 The establishment request message 1 carries the transmission reliability requirements and/or transmission delay requirements of the second type of data of the first service. For related descriptions, refer to the above step S701, which will not be repeated here.

Optionally, the multicast session establishment request message 1 may also carry the geographic area information of the multicast session to be established by the multicast session establishment request message 1, that is, it can be understood as carrying the first geographic area information of the first service and the first geographic area information of the first service. The second geographic area information of a service, the first geographic area information is used to indicate the coverage area of the first type of data, and the second geographic area information is used to indicate the coverage area of the second type of data. Wherein, the first geographic area information of the first service and the second geographic area information of the first service may be the same or different. If the first geographic area information of the first service is the same as the second geographic area information of the first service, both They can be identified by the same cell. In the embodiments of the present application, the first geographic area information and the second geographic area information are the same as an example for description, and the following embodiments are collectively referred to as geographic area information.

S902. The SMF network element determines the first access network type, and the SMF network element determines the second access network type.

For the related description of the access network type, please refer to the foregoing description, and the method for the SMF network element to determine the first access network type can refer to the method for the SMF network element to determine the first access network type in step S702, which will not be repeated here.

Optionally, according to the different content carried in the multicast session establishment request message 1, the SMF network element determines the second access network type in a different manner. Illustratively, there may be the following two situations:

Case 1: The multicast session establishment request message 1 carries the type identifier of the second type of data of the first service of the first service.

Optionally, in this case 1, the SMF network element determines the second access network type, including: the type identification of the SMF network element according to the second type data of the first service, and one of the type identification and the access network type The corresponding relationship between the two determines the second access network type. For related examples, reference may be made to the related description in case 1 of step S702, which is not repeated here.

It is understandable that because the first type of data and the second type of data are different types of data, the type identification of the first type of data and the type identification of the second type of data are also different. Therefore, the SMF network element connects with the type identification according to the type identification. The first access network type and the second access network type determined by the correspondence between the two network access types are different.

Case 2: The multicast session establishment request message 1 carries the transmission reliability requirements and/or transmission delay requirements of the second type of data of the first service.

Optionally, in the second case, the SMF network element determines the second access network type, including: the SMF network element determines the second access network type according to the transmission reliability requirements and/or transmission delay requirements of the second type of data of the first service. 2. Type of access network.

It should be noted that in the second case, the SMF network element can determine the second access network type only according to the transmission reliability requirements or the transmission delay requirements, or it can determine the second access network type in combination with the transmission reliability requirements and the transmission delay requirements. Network access type. In this embodiment of the application, the SMF network element determines the second access network type according to transmission reliability requirements or transmission delay requirements as an example for description.

Optionally, when the SMF network element only determines the second access network type according to the transmission reliability requirement or the transmission delay requirement, the following four scenarios may exist:

① The SMF network element determines the second access network type according to the transmission reliability requirements of the second type of data of the first service. The transmission reliability requirements of the second type of data are indicated by the PER parameter, and the value of the PER parameter is 3 Or, the transmission reliability requirement of the second type of data is indicated by the index corresponding to the PER parameter, and the SMF network element can determine the value of the PER parameter of the second type of data to be 3 according to the index.

In this scenario ①, the SMF network element determines the second access network type according to the transmission reliability requirements of the second type of data of the first service, which may include: when the value 3 is greater than or equal to the first preset threshold, the SMF network The element determines that the second access network type is terrestrial broadcasting; or, when the value 3 is less than the first preset threshold, the SMF network element determines that the second access network type is mixed-mode multicast/broadcast.

Optionally, when the value 3 is equal to the first preset threshold, the SMF network element may also establish a basic layer data session based on the load of the wide area base station and the medium-range base station, and the basic layer data session received by the SMF network element within a period of time before the current moment. The number of requests and enhancement layer data session establishment requests, the geographic area information carried in the multicast session establishment request message 1, or the network configuration determines that the second access network type is terrestrial broadcasting, or mixed-mode multicast/broadcast, related The description can refer to the scenario ① in step S702 above, which will not be repeated here.

Among them, in the embodiment of the present application, the above-mentioned value 3 may also be referred to as the first value, which is not specifically limited in the embodiment of the present application.

② The SMF network element determines the second access network type according to the transmission reliability requirement of the second type of data of the first service. The transmission reliability requirement of the second type of data is indicated by bit 3 in the multicast session establishment request message 1.

In this scenario ②, if the value of bit 3 is 1, it indicates that the transmission reliability requirement of the second type of data is high, and the value of bit 3 is 0, which indicates that the transmission reliability requirement of the second type of data is low. , The SMF network element determines the second access network type according to the transmission reliability requirements of the second type of data, which may include: the SMF network element determines the second access network type according to the corresponding relationship in Table 6 below, that is, when the bit When the value of 3 is 1, the SMF network element determines that the second access network type is terrestrial broadcasting; or, when the value of the bit 3 is 0, the SMF network element determines that the second access network type is mixed mode multicast /broadcast.

Table 6

比特3取值Bit 3 value	接入网类型 Access network type
11	陆地广播Terrestrial broadcasting
00	混合模式多播/广播Mixed mode multicast/broadcast

③The SMF network element determines the second access network type according to the transmission delay requirement of the second type of data of the first service. The transmission delay requirement of the second type of data is indicated by the PDB parameter, and the value of the PDB parameter is 4 Or, the transmission delay requirement of the second type of data is indicated by the index corresponding to the PDB parameter, and the SMF network element may determine the value of the PDB parameter of the second type of data to be 4 according to the index.

In this scenario ③, the SMF network element determines the second access network type according to the transmission delay requirements of the second type of data of the first service, which may include: when the value 4 is greater than or equal to the second preset threshold, the SMF network The element determines that the second access network type is terrestrial broadcasting; or, when the value 4 is less than the second preset threshold, the SMF network element determines that the second access network type is mixed-mode multicast/broadcast.

Optionally, when the value 4 is equal to the second preset threshold, the SMF network element may also establish a basic layer data session based on the load of the wide area base station and the medium-range base station, and the basic layer data session received by the SMF network element within a period of time before the current moment. The number of requests and enhancement layer data session establishment requests, the geographic area information carried in the multicast session establishment request message 1, or the network configuration determines that the second access network type is terrestrial broadcasting, or mixed-mode multicast/broadcast, related The description can refer to the scenario ① in step S702 above, which will not be repeated here.

Among them, in the embodiment of the present application, the above-mentioned value 4 may also be referred to as the second value, which is not specifically limited in the embodiment of the present application.

④ The SMF network element determines the second access network type according to the transmission delay requirements of the second type of data of the first service, and the transmission delay requirements of the second type of data of the first service use the bits in the multicast session establishment request message 1 4 instructions.

In this scenario ④, if the value of bit 4 is 1, it indicates that the transmission delay requirement of the second type of data is higher. When the value of bit 4 is 0, it indicates that the transmission delay requirement of the second type of data is higher. Is low, the SMF network element determines the second access network type according to the transmission delay requirements of the second type of data, which may include: the SMF network element determines the second access network type according to the corresponding relationship in Table 7 below, that is, when the When the value of bit 4 is 1, the SMF network element determines that the second access network type is mixed mode multicast/broadcast; or, when the value of bit 4 is 0, the SMF network element determines the second access network type For terrestrial broadcasting.

Table 7

比特4取值Bit 4 value	接入网类型 Access network type
11	混合模式多播/广播Mixed mode multicast/broadcast
00	陆地广播Terrestrial broadcasting

It is understandable that because the first type of data and the second type of data are different types of data, for example, the first type of data of the first service is basic layer data, and the second type of data of the first service is enhanced layer data. Below, the first type of data of the first service requires reliable transmission, while the second type of data of the first service has lower requirements for transmission reliability. Therefore, when the SMF network element determines the access network type according to the same type of demand information of the data, it determines The access network types of different data are different.

Optionally, in this step S902, the SMF network element may also allocate a first downstream address and a second downstream address. For the first downstream address and the second downstream address, reference may be made to the foregoing description, which will not be repeated here.

S903. The SMF network element sends a multicast session establishment request message 2 to the AMF network element.

Optionally, the SMF network element may send a multicast session establishment request message 2 to the AMF network element in the geographic area according to the geographic area information carried in the multicast session establishment request message 1.

Wherein, the multicast session establishment request message 2 carries the first access network type, the first downlink address, the second access network type, the second downlink address, and the above-mentioned geographic area information. In this case, the geographic area information may be Used for AMF network element or MCE to select RAN equipment in subsequent steps. Optionally, after receiving the multicast session establishment request message 2, the AMF network element may perform the following steps S904a-S904b, or may perform the following step S904c.

S904a. The AMF network element sends the multicast session establishment request message 2 to the first RAN device.

Correspondingly, the first RAN device receives the multicast session establishment request message 2 from the AMF network element.

S904b. The AMF network element sends the multicast session establishment request message 2 to the second RAN device.

Correspondingly, the second RAN device receives the multicast session establishment request message 2 from the AMF network element.

Optionally, in steps S904a-S904b, after the AMF network element receives the multicast session establishment request message 2 from the SMF network element, it may forward the multicast session establishment request message 2 to all RAN devices connected to it. The equipment includes the first RAN equipment and the second RAN equipment; or, according to the above geographic area information, the AMF network element forwards the multicast session establishment request message 2 to all RAN equipment that can cover this geographic area, and all RAN equipment includes The first RAN device and the second RAN device. Among them, in the embodiment of the present application, the second RAN device and the first RAN device are different RAN devices, which are described here in a unified manner, and the following embodiments will not be repeated.

S904c. The AMF network element sends the multicast session establishment request message 2 to the MCE. Correspondingly, the MCE receives the multicast session establishment request message 2 from the AMF network element.

For related description, please refer to the above step S704b, which will not be repeated here.

Optionally, after receiving the multicast session establishment request message 2, the MCE executes the following steps S904d-S904e.

S904d. The MCE sends a multicast session establishment request message 3 to the first RAN device according to the first access network type.

Correspondingly, the first RAN device receives the multicast session establishment request message 3 from the MCE.

Optionally, after receiving the multicast session establishment request message 2 from the AMF network element, the MCE can select all RAN devices that can cover the geographical area according to the geographical area information carried in the multicast session establishment request message 2, and then Among all the RAN devices that can cover the geographic area, select the first RAN device with the same type as the first access network type, and send a multicast session establishment request message 3 to the first RAN device, and send the multicast session establishment request message to the first RAN device. Message 3 carries the downlink address of the first service.

S904e. The MCE sends a multicast session establishment request message 4 to the second RAN device according to the second access network type.

Correspondingly, the second RAN device receives the multicast session establishment request message 4 from the MCE.

Wherein, the multicast session establishment request message 4 carries the second downlink address.

Optionally, after receiving the multicast session establishment request message 2 from the AMF network element, the MCE can select all RAN devices that can cover the geographical area according to the geographical area information carried in the multicast session establishment request message 2, and then Among all RAN devices that can cover the geographic area, a second RAN device of the same type as the second access network is selected, and the multicast session establishment request message 4 is sent to the second RAN device.

Optionally, if the first RAN device receives the multicast session establishment request message 2 from the AMF network element, the first RAN device performs the following steps S905a-S906; if the first RAN device receives the multicast session establishment from the MCE Request message 3, the first RAN device executes the following steps S905b-S906.

S905a. The first RAN device determines that the type of the first RAN device is the same as the type of the first access network.

Optionally, after receiving the multicast session establishment request message 2 from the AMF network element, the first RAN device may first determine whether the geographic area information carried in the multicast session establishment request message 2 is the same as the location information of the RAN device When the geographic area information is the same as the location information of the RAN device, it is further determined whether the type of the first RAN device is the same as the type of the first access network or the same as the type of the second access network. If the type of the first RAN device is the same as that of the second access network If the type of the first access network is the same, the first RAN device initiates the first type of data transmission path establishment procedure for the first service; or, if the type of the first RAN device is the same as the type of the second access network, the first RAN device The establishment process of the second type data transmission path of the first service is initiated.

Optionally, when the type of the first RAN device is different from both the first access network type and the second access network type, the first RAN device does not initiate a data transmission path establishment process.

Exemplarily, in this embodiment, the type of the first RAN device is the same as the type of the first access network as an example for description. At this time, the first RAN device continues to perform the following step S905b.

S905b. The first RAN device initiates a first-type data transmission path establishment process of the first service.

Optionally, the first RAN device may send a message a to the UPF network element 1 used to transmit the first type of data of the first service, the destination address of the message a is the IP address of the UPF network element 1, and the message a carries The first downlink address, the message a is used to establish a transmission path between the RAN device and the UPF network element 1 for transmitting the first type of data of the first service. For related description, please refer to the above step S705b, which will not be repeated here.

S906: The first RAN device sends a multicast session establishment response message 1 to the SMF network element through the AMF network element.

Correspondingly, the SMF network element receives the multicast session establishment response message 1 sent by the first RAN device through the AMF network element.

Optionally, if the second RAN device receives the multicast session establishment request message 2 from the AMF network element, the second RAN device performs the following steps S907a-S908; if the second RAN device receives the multicast session establishment from the MCE Request message 4, the second RAN device performs the following steps S907b-S908.

S907a. The second RAN device determines that the type of the second RAN device is the same as the type of the second access network.

Wherein, in this step, the action of the second RAN device is the same as the action of the first RAN device in the above step S905a. For related description, please refer to the above step S905a, which will not be repeated here.

Optionally, the type of the second RAN device may be the same as the type of the first access network, or may be the same as the type of the second access network. For example, in this embodiment, the type of the second RAN device is the same as that of the second access network. Take the same network type as an example for description. At this time, the second RAN device continues to perform the following step S907b.

S907b. The second RAN device initiates a second-type data transmission path establishment process of the first service.

Optionally, the second RAN device may send a message b to the UPF network element 2 used to transmit the second type of data of the first service. The destination address of the message b is the IP address of the UPF network element 2, and the message b carries The second downlink address, the message b is used to establish a transmission path between the second RAN device and the UPF network element 2 for transmitting the second type of data of the first service. The process of establishing a transmission path of the second type of data for the first service is similar to the process of establishing a transmission path of the first type of data for the first service. For related description, please refer to the above step S705b, which will not be repeated here.

Among them, in the embodiment of this application, message b may also be called the second message; UPF network element 2 may also be called the second UPF network element, and UPF network element 2 does not limit the number of UPF network elements, that is, UPF network element The element 2 may be one or more UPF network elements, and the UPF network element 2 and the UPF network element 1 are different UPF network elements, which are described here in a unified manner, and the following embodiments will not be repeated.

S908. The second RAN device sends a multicast session establishment response message 2 to the SMF network element through the AMF network element.

Correspondingly, the SMF network element receives the multicast session establishment response message 2 sent by the second RAN device through the AMF network element.

S909: The SMF network element sends an N4 session establishment request message 1 to the UPF network element 1.

Correspondingly, the UPF network element 1 receives the N4 session establishment request message 1 from the SMF network element.

Wherein, the N4 session establishment request message 1 carries the first downlink address.

Optionally, after the UPF network element 1 receives the N4 session establishment request message 1, it stores the first downlink address, and subsequently when receiving the first type of data of the first service from the AF network element, it uses the first downlink address The address is a multicast/multicast address, and the first type of data of the first service is sent in a multicast/multicast manner.

S910. The SMF network element sends an N4 session establishment request message 2 to the UPF network element 2.

Correspondingly, the UPF network element 2 receives the N4 session establishment request message 2 from the SMF network element.

Wherein, the N4 session establishment request message 2 carries the second downlink address.

Optionally, after the UPF network element 2 receives the N4 session establishment request message 2, it stores the second downlink address, and subsequently when receiving the second type of data of the first service from the AF network element, the second downlink address is The multicast/multicast address sends the second type of data of the first service in a multicast/multicast manner.

Optionally, in steps S909-S910, the process of selecting the UPF network element 1 and the UPF network element 2 by the SMF network element may refer to the related description in the foregoing step S707, which will not be repeated here.

Optionally, since the first geographic area information of the first service is the same as the second geographic area information of the first service, when the UPF network element 1 and the UPF network element 2 are selected according to the method in step S707, the SMF network element A part of the multiple UPF network elements that the NRF network element returns to serve the geographic area may be determined as the UPF network element 1, and the other network elements except this part of the network elements may be determined as the UPF network element 2.

S911: The SMF network element sends a multicast session establishment response message 3 to the AF network element.

Correspondingly, the AF network element receives the multicast session establishment response message 3 from the SMF network element.

Wherein, the multicast session establishment response message 3 carries the identifier of the UPF network element 1, the first indication information, the identifier of the UPF network element 2, and the second indication information.

Optionally, the identifier of UPF network element 1 may be the IP address of UPF network element 1, or the IP address and port number of UPF network element 1, and the first indication information may be the type of the first type of data of the first service ID, or the QoS parameter of the first type of data of the first service; the ID of UPF network element 2 can be the IP address of UPF network element 2, or the IP address and port number of UPF network element 2, the second The indication information may be a type identifier of the second type of data of the first service, or may also be a QoS parameter of the second type of data of the first service.

Optionally, after the AF network element receives the multicast session establishment response message 3, it may save the correspondence between the identifier of the UPF network element 1 and the first indication information, and the correspondence between the identifier of the UPF network element 2 and the second indication information When sending downlink data, it can be determined according to the two corresponding relationships that the first type of data of the first service needs to be sent to the UPF network element 1, and the second type of data of the first service needs to be sent to the UPF network element 2.

In the embodiment of this application, the SMF network element can determine the first access network type and the second access network type respectively, so that the first RAN device of the same type as the first access network can be in the first downlink address according to the first downlink address. A transmission path for transmitting the first type of data of the first service is established between a RAN device and the UPF network element 1, and at the same time, a second RAN device of the same type as the second access network can be used in the first downlink address according to the second downlink address. 2. Establish a transmission path between the RAN equipment and the UPF network element 2 for transmitting the second type of data of the first service; in addition, the AF network element can determine the first service according to the identifier of the UPF network element 1 and the first indication information The first type of data needs to be sent to the UPF network element 1, and the AF network element can determine that the second type of data of the first service needs to be sent to the UPF network element 2 according to the identifier of the UPF network element 2 and the second indication information. That is, the first type of data of the first service can be sent by the AF network element to the UPF network element 1, and then transmitted to the first RAN device through the data transmission path between the UPF network element 1 and the first RAN device, and finally by the first RAN device. The device transmits to the terminal, the second type of data of the first service can be sent by the AF network element to the UPF network element 2, and then transmitted to the second RAN device through the data transmission path between the UPF network element 2 and the second RAN device, and finally It is transmitted to the terminal by the second RAN device.

Based on the communication method provided by the embodiments of the present application, the access network device that transmits the data can be determined according to the access network type of the data, and then the data can be transmitted to the access network device corresponding to the data, and the access network device is finally The network equipment transmits the data. On the one hand, the transmission resources that the access network equipment needs to provide are reduced, and the transmission resources required by the corresponding data of the access network equipment can be guaranteed, thereby improving the transmission quality of the corresponding data of the access network equipment. , To improve user experience; on the other hand, the transmission resources provided by the access network equipment only need to ensure the transmission requirements of one type of data of the service, which can reduce the waste of transmission resources in order to meet the transmission requirements of other types of data of the service at the same time At the same time, according to the data transmission requirements, the access network equipment that can meet the transmission requirements can be selected reasonably and flexibly; on the other hand, the session management network element can flexibly configure and transmit different types of data for the service according to the type of service data The access network equipment. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

Among them, the actions of the AF network element, NEF network element, UPF network element 1, UPF network element 2, SMF network element, AMF network element, MCE, first RAN device, and second RAN device in the above steps S901 to S911 can be performed by The processor 601 in the communication device 600 shown in FIG. 6a invokes the application program code stored in the memory 603 to execute, and this embodiment does not impose any limitation on this.

The communication system shown in Figure 4a or Figure 4b or Figure 4c or Figure 4d is applied to the 5G network shown in Figure 5, the session management network element is the SMF network element, the mobility management network element is the AMF network element, and the coordination function network element It is an MCE, and the user plane network element is a UPF network element as an example. As shown in FIG. 10, it is another communication method provided by this embodiment of the application. The communication method includes the following steps:

S1001. The AF network element sends a multicast session establishment request message 1 to the SMF network element.

Wherein, the multicast session establishment request message 1 may be used to request the establishment of a multicast session for transmitting the first type of data of the first service and the second type of data for transmitting the first service. For the first service, the first type of data, and the second type of data, reference may be made to the foregoing description, which will not be repeated here.

Optionally, the multicast session establishment request message 1 may carry the type identification of the first type of data of the first service and the type identification of the second type of data of the first service, or may also carry the first type of data of the first service The transmission reliability requirements and/or transmission delay requirements of the first service and the transmission reliability requirements and/or transmission delay requirements of the second type data of the first service. For related descriptions, please refer to the above step S901, which will not be repeated here.

Optionally, the multicast session establishment request message 1 may also carry a first identification parameter and a second identification parameter. The first identification parameter is used to identify the first type of data of the first service, and the second identification parameter is used to identify the first type of data. For the second type of service data, the relevant description can refer to the foregoing description, which will not be repeated here.

Optionally, the multicast session establishment request message 1 may also carry the geographic area information of the multicast session to be established by the multicast session establishment request message 1, that is, it can be understood as carrying the first geographic area information of the first service and the first geographic area information of the first service. The second geographic area information of a business. Among them, the first geographic area information of the first service and the second geographic area information of the first service may be the same or different. In the embodiment of this application, the first geographic area information of the first service and the second geographic area information of the first service are used. The same area information is taken as an example for description, and collectively referred to as geographic area information in the following embodiments.

S1002, the SMF network element determines the first access network type, and the SMF network element determines the second access network type.

Among them, the implementation manner of determining the first access network type and the second access network type by the SMF network element can refer to the foregoing step S902, which is not repeated here.

Optionally, in this step S1002, the SMF network element may also allocate a first downstream address and a second downstream address. For the first downstream address and the second downstream address, reference may be made to the foregoing description, which will not be repeated here.

S1003. The SMF network element sends a multicast session establishment request message 2 to the AMF network element.

Wherein, the multicast session establishment request message 2 carries the first access network type, the first downlink address, the second access network type, the second downlink address, and the above-mentioned geographic area information. For related description, please refer to the above-mentioned step S903. I won't repeat them here.

Optionally, after receiving the multicast session establishment request message 2, the AMF network element may perform the following steps S1004a-S1004b, or may perform the following step S1004c.

S1004a. The AMF network element sends the multicast session establishment request message 2 to the first RAN device.

S1004b. The AMF network element sends the multicast session establishment request message 2 to the second RAN device.

For the related description, please refer to the above steps S904a-S904b, which will not be repeated here.

S1004c. The AMF network element sends the multicast session establishment request message 2 to the MCE.

Correspondingly, the MCE receives the multicast session establishment request message 2 from the AMF network element.

Optionally, after receiving the multicast session establishment request message 2, the MCE executes the following steps S1004d-S1004e.

S1004d. The MCE sends a multicast session establishment request message 3 to the first RAN device according to the first access network type.

Wherein, the multicast session establishment request message 3 carries the first downlink address. For related description, please refer to the above step S904d, which will not be repeated here.

S1004e. The MCE sends a multicast session establishment request message 4 to the second RAN device according to the second access network type.

Wherein, the multicast session establishment request message 4 carries the second downlink address. For related description, please refer to the above step S904e, which will not be repeated here.

Optionally, if the first RAN device receives the multicast session establishment request message 2 from the AMF network element, the first RAN device performs the following steps S1005a-S1006; if the first RAN device receives the multicast session establishment from the MCE Request message 3, the first RAN device executes the following steps S1005b-S1006.

S1005a. The first RAN device determines that the type of the first RAN device is the same as the type of the first access network.

For related description, please refer to the above step S905a, which will not be repeated here.

Optionally, the type of the first RAN device may be the same as the type of the first access network, or may be the same as the type of the second access network. For example, in this embodiment, the type of the first RAN device is the same as the type of the first access network. Take the same network type as an example for description. At this time, the first RAN device continues to perform the following step S1005b.

S1005b. The first RAN device initiates a process of establishing a transmission path for the first type of data of the first service.

Optionally, the first RAN device may send a message a to the UPF network element, where the destination address of the message a is the IP address of the UPF network element, the message a carries the first downlink address, and the message a is used in the RAN A transmission path for the first type of data of the first service is established between the device and the UPF network element, where the UPF network element is used to transmit both the first type of data of the first service and the second type of data of the first service, For the related description of the data transmission path establishment process, please refer to the above step S705b, which will not be repeated here.

S1006. The first RAN device sends a multicast session establishment response message 1 to the SMF network element through the AMF network element.

Optionally, if the second RAN device receives the multicast session establishment request message 2 from the AMF network element, the second RAN device performs the following steps S1007a-S1008; if the second RAN device receives the multicast session establishment from the MCE Request message 4, the second RAN device executes the following steps S1007b-S1008.

S1007a. The second RAN device determines that the type of the second RAN device is the same as the type of the second access network.

Optionally, the type of the second RAN device may be the same as the type of the first access network, or may be the same as the type of the second access network. For example, in this embodiment, the type of the second RAN device is the same as that of the second access network. Take the same network type as an example for description. At this time, the second RAN device continues to perform the following step S1007b.

S1007b. The second RAN device initiates a data transmission path establishment process of the second service.

Optionally, the second RAN device may send a message b to the UPF network element, the destination address of the message b is the IP address of the UPF network element, the message b carries the second downlink address, and the message b is used for the second downlink address. A transmission path for the second type of data of the first service is established between the RAN device and the UPF network element. For the related description of the data transmission path establishment process, refer to the foregoing step S705b, which will not be repeated here.

S1008. The second RAN device sends a multicast session establishment response message 2 to the SMF network element through the AMF network element.

S1009. The SMF network element sends an N4 session establishment request message to the UPF network element.

Correspondingly, the UPF network element receives the N4 session establishment request message from the SMF network element.

Wherein, the N4 session establishment request message carries a first downlink address, a first identification parameter, a second downlink address, and a second identification parameter. The first identification parameter is used to identify the first type of data of the first service, and the second identification The parameter is used to identify the second type of data of the first service.

Optionally, the first identification parameter and the second identification parameter may be carried in the multicast session establishment request message 1 in step S1001 above, that is, the SMF network element may receive the first identification parameter and the second identification parameter from the AF network element Parameters and send them to the UPF network element.

Optionally, the process of selecting a UPF network element by the SMF network element can refer to the related description in the foregoing step S707, which will not be repeated here.

Optionally, after receiving the N4 session establishment request message, the UPF network element stores the correspondence between the first downlink address and the first identification parameter, and the correspondence between the second downlink address and the second identification parameter, so as to receive it later. When the downlink data of the first service from the AF network element is received, the downlink data is identified and forwarded.

S1010. The SMF network element sends a multicast session establishment response message 3 to the AF network element.

Wherein, the multicast session establishment response message 3 carries the identifier of the UPF network element. The identifier of the UPF network element may be the IP address of the UPF network element, or the IP address and port number of the UPF network element.

S1011. The AF network element sends the downlink data of the first service to the UPF network element. Correspondingly, the UPF network element receives the downlink data of the first service from the AF network element.

S1012. The UPF network element identifies the downlink data of the first service according to the identification parameter.

Optionally, when the first identification parameter is the first value and the second identification parameter is the second value, the UPF network element may identify the downlink data of the first service according to the identification parameter as follows: When the value of the first field of the protocol frame is the first value, the UPF network element recognizes that the downlink data is the first type of data of the first service; or, when the value of the first field carrying the downlink data is the first value When the value is two, the UPF network element recognizes that the downlink data is the second type of data of the first service.

It should be noted that when the first value includes multiple values, the value of the first field includes: the value of the first field is any one of the multiple values; when the second value includes When there are multiple numerical values, the value of the first field is the second value includes: the value of the first field is any one of the multiple numerical values.

Optionally, when the first identification parameter is the first IP address and the second identification parameter is the second IP address, the UPF network element can identify the downlink data of the first service according to the identification parameter as follows: When the value of the source IP address field of the first protocol frame is the first IP address, the UPF network element recognizes that the downlink data is the first type of data of the first service; or, when the first protocol frame carrying the downlink data is When the value of the source IP field is the second IP address, the UPF network element recognizes that the downlink data is the second type of data of the first service.

Optionally, when the first identification parameters are the first IP address and the first port number, and the second identification parameters are the second IP address and the second port number, the UPF network element performs the downlink data of the first service according to the identification parameters. The identification may be: when the value of the source IP address field of the first protocol frame carrying the downlink data is the first IP address, and the value of the source port number field and/or the destination port number field is the first port number, The UPF network element recognizes that the downlink data is the first type of data of the first service; or, when the source IP field of the first protocol frame carrying the downlink data is the second IP address, and the source port number field and/ Or when the value of the destination port number field is port number 2, the UPF network element recognizes that the downlink data is the second type of data of the first service.

Optionally, when the UPF network element recognizes that the downlink data is the first type of data of the first service according to the first identification parameter, perform the following step S1013a; or, when the UPF network element recognizes the downlink data according to the second identification parameter For the second type of data of the first service, the following step S1013b is executed.

S1013a. The UPF network element sends the downlink data according to the first downlink address.

Wherein, since the first RAN device establishes the data transmission path between the first RAN device and the UPF network element according to the first downlink address, the second RAN device establishes the data transmission path between the second RAN device and the UPF network element according to the second downlink address. Data transmission path. Therefore, after the UPF network element sends the downlink data according to the first downlink address, the first RAN device can receive the downlink data, but the second RAN device does not receive the downlink data.

Optionally, the UPF network element sending the downlink data according to the first downlink address may be: the UPF network element uses the first downlink address as the multicast/multicast address to send the downlink data in a multicast/multicast manner .

S1013b. The UPF network element sends the downlink data according to the second downlink address.

Wherein, since the first RAN device establishes the data transmission path between the first RAN device and the UPF network element according to the first downlink address, the second RAN device establishes the data transmission path between the second RAN device and the UPF network element according to the second downlink address. Data transmission path, therefore, after the UPF network element sends the downlink data according to the second downlink address, the second RAN device can receive the downlink data, but the first RAN device does not receive the downlink data.

Optionally, the UPF network element sending the downlink data according to the second downlink address may be: the UPF network element uses the second downlink address as the multicast/multicast address to send the downlink data in a multicast/multicast manner.

In the embodiment of this application, the SMF network element can determine the first access network type and the second access network type respectively, so that the first RAN device of the same type as the first access network can be in the first downlink address according to the first downlink address. A transmission path for the first type of data of the first service is established between a RAN device and a UPF network element, and at the same time, a second RAN device of the same type as the second access network can communicate with the second RAN device according to the second downlink address. The UPF network element establishes a transmission path for the second type of data of the first service; in addition, the UPF network element can identify the downlink data of the first service according to the identification parameter sent by the SMF network element, and when it is identified according to the first identification parameter When the downlink data is the first type of data of the first service, the downlink data is sent according to the first downlink address, so that the first RAN device can receive the downlink data, and it is finally transmitted by the first RAN device to the terminal. When the parameter identifies that the downlink data is the second type of data of the first service, the downlink data is sent according to the second downlink address, so that the second RAN device can receive the downlink data, and the second RAN device finally transmits it to the terminal.

Based on the communication method provided by the embodiments of the present application, the access network device that transmits the data can be determined according to the access network type of the data, and then the data can be transmitted to the specific type of access network device corresponding to the data, and finally The access network device transmits the data. On the one hand, the transmission resources that the access network device needs to provide are reduced, which can ensure the transmission resources required by the corresponding data of the access network device, thereby improving the corresponding data of the access network device. On the other hand, the transmission resources provided by the access network equipment only need to ensure the transmission requirements of one type of data of the service, which can reduce the transmission requirements for other types of data of the service at the same time. Transmission resources are wasted; on the other hand, the session management network element can flexibly configure the access network equipment that transmits different types of data for the service according to the type of the service data. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

Among them, the actions of the AF network element, NEF network element, UPF network element, SMF network element, AMF network element, MCE, first RAN device, and second RAN device in the above steps S1001 to S1013a or steps S1001 to S1013b can be shown in the figure The processor 601 in the communication device 600 shown in 6a invokes the application program code stored in the memory 603 to execute, and this embodiment does not impose any limitation on this.

The communication system shown in Figure 4a or Figure 4b or Figure 4c or Figure 4d is applied to the 5G network shown in Figure 5, the session management network element is the SMF network element, the mobility management network element is the AMF network element, and the coordination function network element It is an MCE, and the user plane network element is a UPF network element as an example. As shown in FIG. 11, it is another communication method provided by an embodiment of this application. The communication method includes the following steps:

S1101, the AF network element sends a multicast session establishment request message 1 to the SMF network element.

Wherein, the multicast session establishment request message 1 can be used to request the establishment of a multicast session of the first service. This session is used to carry the first type of data of the first service and the second type of data of the first service. The first service, For the first type of data and the second type of data, reference may be made to the foregoing description, which will not be repeated here.

Optionally, the multicast session establishment request message 1 may also carry a first identification parameter and a second identification parameter. The first identification parameter is used to identify the first type of data of the first service, and the second identification parameter is used to identify the first type of data. The second type of business data.

S1102. The SMF network element determines the first access network type, and the SMF network element determines the second access network type.

S1103. The SMF network element sends a multicast session establishment request message 2 to the AMF network element.

Wherein, the multicast session establishment request message 2 carries the first access network type, the first identification parameter, the second access network type, the second identification parameter, the downlink address, and the above-mentioned geographic area information. The downlink address is used for The data transmission path of the service is established between the RAN equipment and the UPF network element. For other related descriptions, please refer to the above step S903, which will not be repeated here.

Optionally, the first identification parameter and the second identification parameter may be carried in the multicast session establishment request message 1 in step S1101, that is, the SMF network element may receive the first identification parameter and the second identification parameter from the AF network element. Parameters and send them to the AMF network element.

Optionally, after the AMF network element receives the multicast session establishment request message 2, it may perform the following step S1104a or the following step S1104b.

S1104a. The AMF network element sends a multicast session establishment request message 3 to the RAN device.

Correspondingly, the RAN device receives the multicast session establishment request message 3 from the AMF network element.

Wherein, the multicast session establishment request message 3 carries the first access network type, the first identification parameter, the second access network type, the second identification parameter, and the downlink address.

Among them, the relevant description of the AMF network element selecting the RAN device can refer to the above step S704a, which will not be repeated here.

S1104b. The AMF network element sends the multicast session establishment request message 2 to the MCE.

Optionally, after receiving the multicast session establishment request message 2, the MCE executes the following step S1104c.

S1104c. The MCE sends a multicast session establishment request message 3 to the RAN device.

Correspondingly, the RAN device receives the multicast session establishment request message 3 from the MCE.

Optionally, after receiving the multicast session establishment request message 2, the MCE may select all RAN devices located in this geographical area according to the geographical area information carried in the multicast session establishment request message 2, and then send the message to all RANs The device sends the multicast session establishment request message 3.

S1105. The RAN device initiates a data transmission path establishment process of the first service.

Optionally, the RAN device may send a message a to the UPF network element, the destination address of the message a is the IP address of the UPF network element, and the message a carries the downlink address carried in the multicast session establishment request message 3. The message a is used to establish a data transmission path of the first service between the RAN device and the UPF network element, where the UPF network element is used to transmit the first type of data of the first service and the data of the first service. For the second type of data, the related description of the data transmission path establishment process can refer to the above step S705b, which will not be repeated here.

S1106. The RAN device sends a multicast session establishment response message 1 to the SMF network element through the AMF network element.

S1107. The SMF network element sends an N4 session establishment request message to the UPF network element.

Wherein, the N4 session establishment request message carries the aforementioned downlink address.

S1108. The SMF network element sends a multicast session establishment response message 2 to the AF network element.

Wherein, the multicast session establishment response message 2 carries the identifier of the UPF network element. The identifier of the UPF network element may be the IP address and port number of the UPF network element.

S1109. The AF network element sends the downlink data of the first service to the RAN device through the UPF network element. Correspondingly, the RAN device receives the downlink data of the first service sent by the AF network element through the UPF network element.

S1110. The RAN device identifies the downlink data of the first service.

Among them, the RAN device can identify the downlink data as the first type of data of the first service or the second type of data of the first service according to the identification parameters. The relevant description of the identification of the downlink data of the, will not be repeated here. In addition, the RAN device may also determine that the type of the RAN device is the same as the first access network type or the second access network type.

Wherein, when the type of the RAN device is the same as the type of the first access network, and the RAN device recognizes that the downlink data is the first type of data of the first service according to the first identification parameter, the RAN device sends the downlink data; or, When the type of the RAN device is the same as the type of the second access network, and the RAN device recognizes that the downlink data is the second type of data of the first service according to the second identification parameter, the RAN device sends the downlink data.

Optionally, when the type of the RAN device is the same as the type of the first access network, and the RAN device recognizes that the downlink data is data of the second type of the first service, or the type of the RAN device is the same as that of the first access network When the types are the same and the RAN device recognizes that the downlink data is the first type of data of the first service, the RAN device discards the downlink data.

In the embodiment of the present application, the RAN equipment is based on the service access network type and service identification parameters. The type of the RAN equipment is the same as the first access network type, and the downlink data is identified as the first service according to the first identification parameter. The downlink data is sent only when the first type of data is used, or when the type of the RAN device is the same as the second access network device of the first service and the downlink data is identified as the second type of data of the first service according to the second identification parameter Only then send the downlink data.

Based on the communication method provided by the embodiments of the present application, the access network device that transmits the data can be determined according to the access network type of the data, and the data is finally transmitted by the access network device. On the one hand, the transmission that the access network device needs to provide The resource reduction can ensure the transmission resources required by the corresponding data of the access network equipment, thereby improving the transmission quality of the corresponding data of the access network equipment and improving the user experience; on the other hand, the transmission resources provided by the access network equipment Only need to ensure the transmission requirements of one type of data of the business, and thus can reduce the waste of transmission resources in order to meet the transmission requirements of other types of data of the business at the same time; on the other hand, the session management network element can be based on the type of business data. The service flexibly configures the access network equipment that transmits different types of data of the service. Therefore, the communication method provided by the embodiments of the present application can transmit different types of data of the service more rationally and flexibly.

Among them, the actions of the AF network element, NEF network element, UPF network element, SMF network element, AMF network element, MCE, and RAN device in the above steps S1101 to S1110 can be performed by the processor 601 in the communication device 600 shown in FIG. 6a. The application program code stored in the memory 603 is called for execution, and this embodiment does not impose any limitation on this.

It can be understood that, in each of the above embodiments, the methods and/or steps implemented by the session management network element, the access network device, the coordination function network element, the user plane network element, and the application function network element can also be used for Session management network elements, access network equipment, coordination function network elements, user plane network elements, and application function network elements are implemented by components (such as chips or circuits).

The foregoing mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between various network elements. Correspondingly, an embodiment of the present application also provides a communication device. The communication device may be the session management network element in the foregoing method embodiment, or a device including the foregoing session management network element, or a component that can be used for the session management network element ( For example, a chip or a system on a chip); or, the communication device may be the access network device in the foregoing method embodiment, or a device containing the foregoing access network device, or a component that can be used for the access network device (such as a chip or on-chip System); or, the communication device may be the coordination function network element in the above method embodiment, or a device containing the coordination function network element, or a component (such as a chip or a system on a chip) that can be used for the coordination function network element; or The communication device may be the user plane network element in the above method embodiment, or a device containing the above user plane network element, or a component (such as a chip or a system on a chip) that can be used for the user plane network element; or, the communication device It may be the application function network element in the foregoing method embodiment, or a device containing the foregoing application function network element, or a component (such as a chip or a system on a chip) that can be used for the application function network element. It can be understood that, in order to realize the above-mentioned functions, the communication device includes hardware structures and/or software modules corresponding to various functions. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Exemplarily, FIG. 12 shows a schematic structural diagram of a communication device 120. The communication device 120 includes a transceiver module 1201 and a processing module 1202. The transceiver module 1201 may also be referred to as a transceiver unit to implement a transceiver function, for example, it may be a transceiver circuit, a transceiver, a transceiver or a communication interface.

In a possible implementation manner, taking the communication device 120 as a session management network element as an example, the processing module 1202 is used to determine the first access network type; the transceiver module 1201 is used to send the first access network element to the mobility management network element. The access network type, where the first access network type is the type of the access network used to transmit the first type of data of the first service.

Optionally, the transceiver module 1201 is further configured to send first information to the mobility management network element, where the first information includes the first downlink address or the first identification parameter, where the first downlink address is the first service The downlink address of the first type of data, and the first identification parameter is used to identify the first type of data of the first service.

Optionally, the transceiver module 1201 is further configured to send the identification and indication information of the first user plane network element to the application function network element. The indication information may be the type identification of the first type of data of the first service, or the first type of data. QoS parameters of the first type of data for a service.

Optionally, the processing module 1202 is further configured to determine the second access network type; the transceiver module 1201 is also configured to send the second access network type to the mobility management network element, and the second access network type is used The type of the access network used to transmit the second type of data of the first service.

Optionally, the transceiver module 1201 is further configured to send second information to the mobility management network element, where the second information includes the second downlink address or the second identification parameter, where the second downlink address is for the first service The downlink address of the second type of data, and the second identification parameter is used to identify the second type of data of the first service.

Optionally, the transceiver module 1201 is further configured to send the first downlink address, the first identification parameter, the second downlink address, and the second identification parameter to the user plane network element; wherein, the first identification parameter The first type of data is used to identify the first service, and the second identification parameter is used to identify the second type of data of the first service.

Optionally, the transceiver module 1201 is further configured to receive the first identification parameter and the second identification parameter from the application function network element.

Optionally, the transceiver module 1201 is further configured to receive the type identification of the second type of data of the first service from the application function network element; the processing module 1202 is also configured to determine the type of the second access network, including: a processing module 1202 And is also used to determine the second access network type according to the type identifier of the second type data and the correspondence between the type identifier and the access network type.

Optionally, the transceiver module 1201 is also used to receive the QoS parameters of the second type of data; the processing module 1202 is also used to determine the type of the second access network, including: the processing module 1202, which is also used to determine the second type of data The QoS parameter determines the type of the second access network.

Optionally, when the QoS parameter of the second type of data of the first service includes the PER parameter of the second type of data, and the PER parameter takes the first value, the processing module 1202 is further configured to perform according to the second type of data Determining the second access network type including: when the first value is greater than or equal to the first preset threshold, the processing module 1202 is configured to determine that the second access network type is terrestrial broadcasting; or, when the first value is greater than or equal to the first preset threshold When the first value is less than the first preset threshold, the processing module 1202 is configured to determine that the second access network type is mixed mode multicast/broadcast.

Optionally, when the QoS parameter of the second type data of the first service includes the PDB parameter of the second type data of the first service, and the value of the PDB parameter is the second value, the processing module 1202 is further configured to The QoS parameters of the second type of data of the first service to determine the second access network type include: when the second value is greater than or equal to a second preset threshold, the processing module 1202 is configured to determine the second access network The type is terrestrial broadcasting; or, when the second value is less than the second preset threshold, the processing module 1202 is configured to determine that the second access network type is mixed-mode multicast/broadcast.

Optionally, the transceiver module 1201 is further configured to receive the type identification of the first type of data of the first service from the application function network element; the processing module 1202 is also configured to determine the type of the first access network, including: a processing module 1202 And is also used to determine the first access network type according to the type identifier of the first type of data of the first service and the correspondence between the type identifier and the access network type.

Optionally, the transceiver module 1201 is further configured to receive QoS parameters of the first type of data of the first service; the processing module 1202 is also configured to determine the type of the first access network, including: a processing module 1202, which is also configured to The QoS parameter of the first type of data of a service determines the type of the first access network.

Optionally, when the QoS parameter of the first type of data of the first service includes the PER parameter of the first type of data of the first service, and the value of the PER parameter is a third value, the processing module 1202 is further configured to The QoS parameters of the first type of data of the first service to determine the first access network type include: when the third value is greater than or equal to the first preset threshold, the processing module 1202 is configured to determine the first access network type It is terrestrial broadcasting; or, when the third value is less than the first preset threshold, the processing module 1202 is configured to determine that the type of the first access network is mixed-mode multicast/broadcast.

Optionally, when the QoS parameter of the first type of data of the first service includes the PDB parameter of the first type of data of the first service, and the value of the PDB parameter is a fourth value, the processing module 1202 is further configured to The QoS parameters of the first type of data of the first service to determine the first access network type include: when the fourth value is greater than or equal to a second preset threshold, the processing module 1202 is configured to determine the first access network The type is terrestrial broadcasting; or, when the fourth value is less than the second preset threshold, the processing module 1202 is configured to determine that the type of the first access network is mixed-mode multicast/broadcast.

In another possible implementation manner, taking the communication device 120 as an access network device as an example, the transceiver module 1201 is configured to receive the first access network type and the first downlink address from the mobility management network element; processing The module 1202 is configured to determine that the type of the access network device is the same as the type of the first access network; the transceiver module 1201 is also configured to send a first message to the first user plane network element according to the first access network type, The first message carries the first downlink address, and the first message is used to establish the transmission path for transmitting the first type of data of the first service between the access network device and the first user plane network element .

Optionally, the transceiver module 1201 is further configured to receive the second access network type and the second downlink address from the mobility management network element; the processing module 1202 is also configured to determine the type of the access network device and the second downlink address. The second access network types are the same; the transceiver module 1201 is also configured to send a second message to the second user plane network element according to the second access network type, the second message carrying the second downlink address, and the second message It is used to establish a transmission path for transmitting the second type of data of the first service between the access network device and the second user plane network element.

In another possible implementation manner, taking the communication device 120 as a coordination function network element as an example, the transceiver module 1201 is configured to receive the first downlink address and the first access network type from the mobility management network element; processing The module 1202 is configured to determine the first access network device according to the first access network type; the transceiver module 1201 is also configured to send the first downlink device to the first access network device according to the first access network type address.

Optionally, the transceiver module 1201 is further configured to receive a second downlink address from the mobility management network element and the second access network type; the processing module 1202 is further configured to determine the second access network type according to the second access network type. Network access equipment; the transceiver module 1201 is also configured to send the second downlink address to the second access network equipment according to the second access network type.

In another possible implementation manner, taking the communication device 120 as an access network device as an example, the transceiver module 1201 is configured to receive the first access network type and the first identification parameter from the session management network element, and the first identification parameter An identification parameter is used to identify the first type of data of the first service; the processing module 1202 is used to determine that the type of the access network device is the same as the type of the first access network; the processing module 1202 is also used to identify the first type of data An identification parameter identifies that the downlink data is the first type of data of the first service; the transceiver module 1201 is also used to send the first type of data of the first service.

Optionally, the transceiver module 1201 is further configured to receive a second access network type and the second identification parameter from the session management network element, where the second identification parameter is used to identify the second type of data of the first service; processing The module 1202 is also used to determine that the type of the access network device is the same as the second access network type; the processing module 1202 is also used to identify that the downlink data is the second of the first service according to the second identification parameter Type data; the transceiver module 1201 is also used to send the second type data of the first service.

In another possible implementation manner, taking the communication device 120 as a user plane network element as an example, the transceiver module 1201 is configured to receive the first downlink address, the first identification parameter, and the second downlink address from the session management network element. Address and the second identification parameter; the transceiver module 1201 is also used to receive the downlink data of the first service from the application function network element; the processing module 1202 is used to identify the downlink data as the first identification parameter according to the first identification parameter The first type of data for a service; the transceiver module 1201 is further configured to send the downlink data according to the first downlink address; or the processing module 1202 is configured to identify that the downlink data is the first according to the second identification parameter The second type of service data, the transceiver module 1201, is also used to send the downlink data according to the second downlink address.

Optionally, when the first identification parameter is a first value, and the second identification parameter is a second value, the processing module 1202 is configured to identify, according to the first identification parameter, that the downlink data is the first type of data of the first service , Including: when the value of the first field of the first protocol frame carrying the downlink data is the first value, the processing module 1202 is configured to identify that the downlink data is the first value according to the identification parameters of the first service. The first type of data of the service; the processing module 1202, configured to identify the downlink data as the second type of data of the first service according to the second identification parameter, including: when the first protocol frame of the first protocol frame carrying the downlink data When the value of the field is the second value, the processing module 1202 is configured to identify, according to the second identification parameter, that the downlink data is the second type of data of the first service.

In another possible implementation manner, taking the communication device 120 as an application function network element as an example, the transceiver module 1201 is configured to receive the identification and indication information of the first user plane network element from the session management network element. Is the type identifier of the first type of data of the first service, or is the QoS parameter of the first type of data of the first service; the processing module 1202 is configured to determine the The first type of data of the first service needs to be sent to the first user plane network element; the transceiver module 1201 is also configured to send the first type of data of the first service to the first user plane network element.

Among them, all relevant content of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here.

In this embodiment, the communication device 120 is presented in the form of dividing various functional modules in an integrated manner. The "module" here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions. In a simple embodiment, those skilled in the art can imagine that the communication device 120 may take the form of the communication device 600 shown in FIG. 6a.

For example, the processor 601 in the communication device 600 shown in FIG. 6a may invoke the computer execution instructions stored in the memory 603 to enable the communication device 600 to execute the communication method in the foregoing method embodiment.

Specifically, the functions/implementation process of the transceiver module 1201 and the processing module 1202 in FIG. 12 may be implemented by the processor 601 in the communication device 600 shown in FIG. 6a calling the computer execution instructions stored in the memory 603. Alternatively, the function/implementation process of the processing module 1202 in FIG. 12 can be implemented by the processor 601 in the communication device 600 shown in FIG. 6a calling the computer execution instructions stored in the memory 603, and the function of the transceiver module 1201 in FIG. /The implementation process can be implemented through the communication interface 604 in the communication device 600 shown in FIG. 6a.

Since the communication device 120 provided in this embodiment can execute the above-mentioned communication method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, and will not be repeated here.

It should be noted that one or more of the above modules or units can be implemented by software, hardware or a combination of both. When any of the above modules or units are implemented in software, the software exists in the form of computer program instructions and is stored in the memory, and the processor can be used to execute the program instructions and implement the above method flow. The processor can be built in SoC (system on chip) or ASIC, or it can be an independent semiconductor chip. The processor's internal processing is used to execute software instructions for calculations or processing, and may further include necessary hardware accelerators, such as field programmable gate array (FPGA), PLD (programmable logic device) , Or a logic circuit that implements dedicated logic operations.

When the above modules or units are implemented in hardware, the hardware can be a CPU, a microprocessor, a digital signal processing (digital signal processing, DSP) chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, Any one or any combination of SoC, FPGA, PLD, dedicated digital circuit, hardware accelerator, or non-integrated discrete device can run necessary software or do not rely on software to execute the above method flow.

Optionally, an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a chip system), and the communication device includes a processor for implementing the method in any of the foregoing method embodiments. In a possible design, the communication device further includes a memory. The memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the method in any of the foregoing method embodiments. Of course, the memory may not be in the communication device. In another possible design, the communication device also includes an interface circuit, the interface circuit is a code/data read-write interface circuit, and the interface circuit is used to receive computer-executed instructions (computer-executed instructions are stored in a memory and may be directly downloaded from The memory is read, or possibly through other devices) and transferred to the processor. When the communication device is a chip system, it may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiment of the present application.

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

Although this application has been described in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art can understand and understand by viewing the drawings, the disclosure, and the appended claims in the process of implementing the claimed application. Implement other changes of the disclosed embodiment. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit may implement several functions listed in the claims. Certain measures are described in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

Although the application has been described in combination with specific features and embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the application. Correspondingly, the specification and drawings are merely exemplary descriptions of the application as defined by the appended claims, and are deemed to cover any and all modifications, changes, combinations or equivalents within the scope of the application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that the method includes:

The session management network element determines a first access network type, where the first access network type is the type of the access network used to transmit the first type of data of the first service;

The session management network element sends the first access network type to the mobility management network element.
The method according to claim 1, wherein the first access network type includes terrestrial broadcast, or mixed-mode multicast or broadcast.
The method according to claim 1 or 2, wherein the method further comprises:

The session management network element sends first information to the mobility management network element, where the first information includes a first downlink address or a first identification parameter, where the first downlink address is of the first type The downlink address of the data, and the first identification parameter is used to identify the first type of data.
The method according to any one of claims 1-3, wherein the method further comprises:

Determining, by the session management network element, a second access network type, where the second access network type is a type of an access network used to transmit the second type of data of the first service;

The session management network element sends the second access network type to the mobility management network element.
The method according to claim 4, wherein the method further comprises:

The session management network element sends second information to the mobility management network element, where the second information includes a second downlink address or a second identification parameter, where the second downlink address is the address of the second type of data Downlink address, the second identification parameter is used to identify the second type of data.
The method according to claim 4 or 5, wherein the method further comprises:

The session management network element sends the first downlink address, the first identification parameter, the second downlink address, and the second identification parameter to the user plane network element.
The method according to claim 5 or 6, wherein the method further comprises:

The session management network element receives the first identification parameter and the second identification parameter from an application function network element.
The method according to any one of claims 4-7, wherein the method further comprises:

Receiving, by the session management network element, the type identifier of the second type data from the application function network element;

The determination of the second access network type by the session management network element includes:

The session management network element determines the second access network type according to the type identifier of the second type data and the correspondence between the type identifier and the access network type.
The method according to any one of claims 4-7, wherein the method further comprises:

Receiving, by the session management network element, the quality of service QoS parameter of the second type of data;

The determination of the second access network type by the session management network element includes:

The session management network element determines the second access network type according to the QoS parameters of the second type data.
The method according to claim 9, wherein the QoS parameter of the second type data includes a packet error rate PER parameter of the second type data, and the value of the PER parameter is a first value;

The session management network element determining the second access network type according to the QoS parameters of the second type data includes:

When the first value is greater than or equal to a first preset threshold, the session management network element determines that the second access network type is terrestrial broadcasting; or,

When the first value is less than the first preset threshold, the session management network element determines that the type of the second access network is mixed-mode multicast or broadcast.
The method according to claim 9, wherein the QoS parameter of the second type of data includes a packet delay budget PDB parameter of the second type of data, and the value of the PDB parameter is a second value;

The session management network element determining the second access network type according to the QoS parameters of the second type data includes:

When the second value is greater than or equal to a second preset threshold, the session management network element determines that the second access network type is terrestrial broadcasting; or,

When the second value is less than the second preset threshold, the session management network element determines that the type of the second access network is mixed-mode multicast or broadcast.
The method according to any one of claims 1-11, wherein the method further comprises:

Receiving, by the session management network element, the type identifier of the first type data from the application function network element;

The determination of the first access network type by the session management network element includes:

The session management network element determines the first access network type according to the type identifier of the first type data and the correspondence between the type identifier and the access network type.
The method according to any one of claims 1-11, wherein the method further comprises:

Receiving, by the session management network element, the QoS parameter of the first type of data;

The determination of the first access network type by the session management network element includes:

The session management network element determines the first access network type according to the QoS parameters of the first type data.
The method according to claim 13, wherein the QoS parameter of the first type of data includes a PER parameter of the first type of data, and the value of the PER parameter of the first type of data is a third value;

The session management network element determining the first access network type according to the QoS parameters of the first type data includes:

When the third value is greater than or equal to the first preset threshold, the session management network element determines that the type of the first access network is terrestrial broadcasting; or,

When the third value is less than the first preset threshold, the session management network element determines that the type of the first access network is mixed-mode multicast or broadcast.
The method according to claim 13, wherein the QoS parameter of the first type of data comprises a PDB parameter of the first type of data, and the PDB parameter of the first type of data is a fourth value;

The session management network element determining the first access network type according to the QoS parameters of the first type data includes:

When the fourth value is greater than or equal to a second preset threshold, the session management network element determines that the type of the first access network is terrestrial broadcasting; or,

When the fourth value is less than the second preset threshold, the session management network element determines that the type of the first access network is mixed-mode multicast or broadcast.
A communication method, characterized in that the method includes:

The access network device receives a first access network type and a first downlink address from a mobility management network element, where the first access network type is the type of the access network used to transmit the first type of data of the first service , The first downstream address is a downstream address of the first type of data;

The access network device sends a first message to a first user plane network element according to the first access network type, where the first message carries the first downlink address, and the first message is used to A transmission path for transmitting the first type of data is established between the access network device and the first user plane network element.
The method according to claim 16, wherein the method further comprises:

The access network device receives a second downlink address and a second access network type from the mobility management network element, where the second access network type is used to transmit the second type of data of the first service The type of the access network, where the second downlink address is a downlink address of the second type of data;

The access network device sends a second message to a second user plane network element according to the second access network type, where the second message carries the second downlink address, and the second message is used to A transmission path for transmitting the second type of data is established between the access network device and the second user plane network element.
A communication method, characterized in that the method includes:

The coordination function network element receives a first downlink address and a first access network type from the mobility management network element, where the first access network type is the type of the access network used to transmit the first type of data of the first service , The first downstream address is a downstream address of the first type of data;

The coordination function network element sends the first downlink address to the first access network device according to the first access network type.
The method according to claim 18, wherein the method further comprises:

The coordination function network element receives a second downlink address and a second access network type from the mobility management network element, where the second access network type is used to transmit the second type of data of the first service The type of the access network, where the second downlink address is a downlink address of the second type of data;

The coordination function network element sends the second downlink address to the second access network device according to the second access network type.
A communication method, characterized in that the method includes:

The access network device receives the first access network type and the first identification parameter from the session management network element, where the first access network type is the value of the access network used to transmit the first type of data of the first service Type, the first identification parameter is used to identify the first type of data;

Receiving, by the access network device, downlink data of the first service;

When the type of the access network device is the same as the type of the first access network, and the access network device recognizes that the downlink data is the first type data according to the first identification parameter, The access network device sends the downlink data.
The method according to claim 20, wherein the method further comprises:

The access network device receives a second access network type and a second identification parameter from the session management network element, where the second access network type is a second type used to transmit the first service The type of the data access network, the second identification parameter is used to identify the second type of data;

When the type of the access network device is the same as the type of the second access network, and the access network device recognizes that the downlink data is the second type data according to the second identification parameter, The access network device sends the downlink data.
A communication method, characterized in that the method includes:

The user plane network element receives the first downlink address, the first identification parameter, the second downlink address, and the second identification parameter from the session management network element, where the first identification parameter is used to identify the first identification parameter of the first service. Type data, the second identification parameter is used to identify the second type of data of the first service, the first downstream address is the downstream address of the first type of data, and the second downstream address is the The downstream address of the second type of data;

Receiving, by the user plane network element, the downlink data of the first service from the application function network element;

When the user plane network element recognizes that the downlink data is the first type of data according to the first identification parameter, the user plane network element sends the downlink data according to the first downlink address; or ,

When the user plane network element recognizes that the downlink data is the second type data according to the second identification parameter, the user plane network element sends the downlink data according to the second downlink address.
The method according to claim 22, wherein the first identification parameter is a first value, and the second identification parameter is a second value; the method further comprises:

When the value of the first field of the first protocol frame carrying the downlink data is the first value, the user plane network element recognizes that the downlink data is the first type of data; or,

When the value of the first field of the first protocol frame carrying the downlink data is the second value, the user plane network element recognizes that the downlink data is the second type data.
A communication device, characterized in that, the communication device includes: a processor and a memory;

The memory is used to store computer-executable instructions. When the processor executes the computer-executed instructions, so that the communication device executes the method according to any one of claims 1-15, or so that The communication device executes the method according to claim 16 or 17, or so that the communication device executes the method according to claim 18 or 19, or so that the communication device executes the method according to claim 20 or 21. The method, or, so that the communication device executes the method according to claim 22 or 23.
A communication device, characterized in that, the communication device includes: a processor and an interface circuit;

The interface circuit is used to receive computer execution instructions and transmit them to the processor;

The processor is configured to execute the computer-executable instructions to make the communication device execute the method according to any one of claims 1-15, or to make the communication device execute the method according to claim 16 or 17. The method described above, or to cause the communication device to execute the method according to claim 18 or 19, or to cause the communication device to execute the method according to claim 20 or 21, or to cause the communication device to execute the method according to claim 20 or 21. The communication device executes the method according to claim 22 or 23.
A computer-readable storage medium, characterized by comprising instructions, when the instructions run on a communication device, so that the communication device executes the method according to any one of claims 1-15, or, To cause the communication device to execute the method according to claim 16 or 17, or to cause the communication device to execute the method according to claim 18 or 19, or to cause the communication device to execute the method as claimed in claim The method according to 20 or 21, or so that the communication device executes the method according to claim 22 or 23.
A communication device, characterized in that, the communication device includes: a processor;

The processor is configured to read computer-executable instructions in the memory, and execute the computer-executable instructions, so that the communication device executes the method according to any one of claims 1-15, or causes the communication device to execute The method according to claim 16 or 17, or the communication device is caused to execute the method according to claim 18 or 19, or the communication device is caused to execute the method according to claim 20 or 21, or , Causing the communication device to execute the method according to claim 22 or 23.
A computer program product, characterized in that, when the computer program product runs on a communication device, the communication device is caused to execute the method according to any one of claims 1-15, or the communication device is caused to Execute the method according to claim 16 or 17, or cause the communication device to execute the method according to claim 18 or 19, or cause the communication device to execute the method according to claim 20 or 21, Alternatively, the communication device is caused to execute the method according to claim 22 or 23.
A chip, characterized in that it comprises:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory, so that the device installed with the chip executes the method according to any one of claims 1-15, or causes the device with the chip installed The device executes the method according to claim 16 or 17, or causes the device installed with the chip to execute the method according to claim 18 or 19, or causes the device installed with the chip to execute the method as claimed in claim 20 Or the method according to 21, or the device installed with the chip executes the method according to claim 22 or 23.