Subscription Resource Transfer Protocol Based on Beidou Short Message in Satellite Distance Education System

China has a vast territory and a large population. Education is a major problem that plagues people's lives. Satellite distance education is an effective way for users in remote areas to receive education, but the limitation of satellite one-way broadcasting makes it impossible for users in remote areas to subscribe to resources according to their own needs. This paper proposes a satellite remote education system based on the Beidou short message to set up a fixed node (proxy) with a Beidou short message interface in each area. The proxy and the mobile PC form a DTN network through Bluetooth. After obtaining the data resource and the resource list, the proxy sends the data resource and the resource list to the client in the manner of DTN. After obtaining the resource list, the client generates its own subscription message, and sends the subscription message to the proxy in the same manner. The proxy then sends the subscription information to the broadcast server in the form of a Beidou short message, thereby realizing the resource subscription of the client.