Data transmission method and related apparatus

#The present application relates to the field of communications technologies, and in particular, to a data transmission method and a related apparatus.

#With development of network applications, in addition to some conventional mobile Internet services, there are application scenarios and requirements for deploying more application servers in positions relatively close to a base station. For example, in a stadium application scenario, a local application server is deployed in a stadium. Some content delivery network (CDN) service providers also consider deploying a local CDN server to implement video acceleration. In addition, a future 5th generation mobile communications network is a network that interconnects everything. Both the Internet of Vehicles and the Internet of Things are important types of subnets in the 5th generation mobile communications network, and more local application servers are also deployed in the new subnets, for example, message broadcast in a cooperative driving application on the Internet of Vehicles. A multimedia broadcast/multicast service (MBMS), as a transmission technology, is mainly applicable to a scenario in which many users receive same content at a time. Because there are a lot of requirements for transmitting same content to a plurality of users simultaneously in scenarios of the Internet of Vehicles, the Internet of Things, and the like, using MBMS as one of transmission technologies for transmission in this type of local application is a possible technology direction.

#However, in an existing enhanced MBMS (eMBMS) network architecture, key network elements such as a broadcast/multicast service center (BMSC) and a multimedia broadcast/multicast service gateway (MBMS GW) are usually deployed in a core network. Therefore, when the prior art is used to implement transmission of local application layer data, because both the BMSC and the MBMS GW are deployed in the core network, a forwarding plane for the local application layer data needs to be first sent by a local end to the core network and then sent by the core network to the local end, causing a long delay in transmission of the local application layer data and a waste of bandwidth of the core network.

#To describe the technical solutions in the embodiments of the present application more clearly, the following briefly describes the accompanying drawings required for describing the embodiments.

#FIG. 1 is a schematic diagram of an existing wireless network architecture supporting an MBMS;

#FIG. 2 is a schematic diagram of a network architecture according to an embodiment of the present application;

#To make the objectives, technical solutions, and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

#FIG. 1 is a schematic diagram of an existing wireless network architecture supporting an MBMS. As shown in FIG. 1, a 3GPP (3rd Generation Partnership Project) system architecture supporting an eMBMS includes the following network elements and devices.

#User equipment (UE) 101: It supports an activation/deactivation function of an MBMS bearer service. In this embodiment of the present application, the user equipment is a device providing voice and/or data connectivity for a user, and includes a wireless terminal and a wired terminal. The wireless terminal may be a handheld device having a wireless connection function, or another processing device connected to a wireless modem, or a mobile terminal that communicates with one or more core networks through a radio access network. For example, the wireless terminal may be a mobile phone (or referred to as a “cellular” phone) and a computer having a mobile terminal. For another example, the wireless terminal may also be a portable, pocket-sized, handheld, computer built-in, or in-vehicle mobile device.