Chinese Academy of Sciences
People's growing dependency on the Internet makes them want to access the network anytime and anywhere, even while driving cars. Although 3G or 4G networks can be used to achieve this goal, roadside APs have the advantages of low cost and high bandwidth. At present, however, APs cannot cover all the areas, which cause intermittent connectivity. In this paper, the authors propose the DS-Relay, a scheme of cooperative downloading. Unlike some studies that multiple cars download files from the Internet and different cars deliver different blocks of files like a P2P network, their work concentrates on the request of downloading respectively.