A scheduling method for selective contents broadcasting with node relay-based webcast considering user behavior

Due to the recent popularization of digital broadcasting systems, selective contents broadcasting depending on users' preferences have attracted great attention. For example, in a quiz program, a user selects his or her answer and watches the video content for the answer. Although the server can deliver programs reflecting users' preferences, clients have to wait until their selected contents start playing. Conventional methods reduce the waiting time by producing an effective broadcast schedule. However, the server has to deliver several content items so that users have choices. This requires more bandwidth than for non-selective contents. In this paper, we propose a method to reduce the waiting time considering user behavior on selective contents broadcasting with node relay-based webcast that relays data among nodes. When a client pulls out of the network while delivering contents, our proposed method reduces waiting time by selecting other clients and reconstructing a broadcast schedule considering the available bandwidth of each client.