Rippling Broadcast for Wireless Ad Hoc Networks
Date Issued
2009
Date
2009
Author(s)
Yang, Shan-Chi
Abstract
Broadcasting service is an important application in wirelessetworks. The goal is to distribute data packets from one source node to all other nodes in the network. Delivery ratio and reception delay are the two primary measures for broadcasting performance. Due to the wireless channel fluctuations, packet loss is often seen in wireless transmissions. However, the existing broadcast schemes haveifficulty achieving good performance under severe packet loss. In this thesis, we propose the rippling broadcast (RIPcast) scheme which is able to achieve reliable and efficient transmissions in wireless ad hoc networks. The nodes in the network are designed to distribute data packets cooperatively in a special manner. The broadcast scheme also adopts the use of fountain codes to furthernhance the reliability as well as the diversity of dataransmissions. It is observed from the numerical experiments that the proposed scheme significantly enhances the delivery ratio and reduces the reception delay under packet loss compared to the existing broadcast schemes. The performance of video streaming using RIPcast is also investigated. The results suggest that RIPcast is highly suitable for broadcasting service in wireless networks.
Subjects
Wireless Ad Hoc Network
Broadcast
Fountain Codes
Video Streaming
Type
thesis
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