無線アドホックネットワーク上における複数記述符号化を用いたマルチポイント・ポイントビデオストリーミング転送方式の検討

概要

論文の詳細を見る
This paper aims to demonstrate a possible mean of supporting video application over wireless ad hoc networks. We propose a mechanism using multiple points to transmit video applications coded with Multiple Description Coding (MDC) scheme. The advantages of this mechanism are threefold. Firstly, MDC is capable in providing fault-tolerant video decoding. Besides, utilizing of multiple points to send the same video can avoid service interruption due to a single node failure. Last but not least, multipoint approach gives better workload balancing within the network. The idea of sending the same video from multiple points has been wisely implemented in wired networks with the emerging of peer-to-peer technology. Simulation using discrete event simulator to study the performance of the proposed mechanism has been carried out. Simulation results show that the proposed mechanism successfully reduces the number of bad periods and shortens the average length of bad periods. Furthermore, the increase in network workload, due to the additional overhead created by MDC coding, does not significantly affect the network throughput because better load balancing is achieved using multipoint transmission. This observation demonstrates the possibility of improving video quality using the proposed mechanism.
東海大学の論文
2006-03-31