A Broadcast-VOD Protocol in an Integrated Wireless Mobile Network

Abstract

In this paper, we investigate a broadcast-VOD problem in an integrated wireless mobile network. Existing wireless mobile networks can be classified into single-hop (such as GSM system) and multi-hop mobile networks (such as Ad-hoc network). A single-hop wireless mobile network is characterized by each base station (or BS) connecting to other BS by a wired network, but each mobile host (or MH) communicating with its own BS within one-hop transmission radius. Our proposed wireless mobile network is an integration of single-hop and multi-hop mobile networks. The integrated network is characterized by each BS connecting to other BS by a wired network, but each MH communicating with a BS within multi-hop transmission steps. In our integrated network, BSs are connected by a 2-D tori interconnection network. In addition, an important application, called a broadcast-VOD protocol, is presented in such integrated network. Therefore, two contributions are presented in this paper: (a) a new integrated wireless mobile network is proposed, (b) a fast broadcast- VOD protocol is introduced in such new network. In our strategy, VOD-data are well scheduled and broadcasted among 2-D tori-BSs such that the average waiting time is minimum. In each cell area, a VOD (Video On-Demand) is dynamically requested by any MH at the different time to on-line construct a multicast tree, while the root node of multicast tree is a BS. This guarantees that each MH can receive the VOD-segment from its corresponding BS within minimal waiting time. Performance analysis verifies that our proposed scheme outperforms existing schemes.