GloMoSim: a library for parallel simulation of large-scale wireless networks
PADS '98 Proceedings of the twelfth workshop on Parallel and distributed simulation
Path set selection in mobile ad hoc networks
Proceedings of the 3rd ACM international symposium on Mobile ad hoc networking & computing
A speech-optimised multiple access scheme for a mobile ad hoc network
MobiHoc '00 Proceedings of the 1st ACM international symposium on Mobile ad hoc networking & computing
Speech Support in Wireless, Multihop Networks
ISPAN '97 Proceedings of the 1997 International Symposium on Parallel Architectures, Algorithms and Networks
On-Demand Multi Path Distance Vector Routing in Ad Hoc Networks
ICNP '01 Proceedings of the Ninth International Conference on Network Protocols
An algebraic approach to network coding
IEEE/ACM Transactions on Networking (TON)
Low-latency wireless video over 802.11 networks using path diversity
ICME '03 Proceedings of the 2003 International Conference on Multimedia and Expo - Volume 1
Generalized multiple description coding with correlating transforms
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
Multiple description coding using pairwise correlating transforms
IEEE Transactions on Image Processing
IEEE Transactions on Circuits and Systems for Video Technology
Wireless video transport using conditional retransmission and low-delay interleaving
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
An experimental study of multimedia traffic performance in mesh networks
WiTMeMo '05 Papers presented at the 2005 workshop on Wireless traffic measurements and modeling
Providing MAC QoS for multimedia traffic in 802.11e based multi-hop ad hoc wireless networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Resource estimation on wireless backhaul networks
WICON '07 Proceedings of the 3rd international conference on Wireless internet
Link stability-aware reliable packet transmitting mechanism in mobile ad hoc network
International Journal of Communication Systems
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We consider the problem of supporting real-time traffic over packetized wireless ad hoc networks. Our specific emphasis is on speech, since this is a critical application in many scenarios such as emergency deployment of ad hoc networks. Standard retransmission-based Medium Access Control (MAC) strategies are poorly matched to speech applications, because the payload size for speech as well as for MAC-layer acknowledgements (ACKs) is small compared to the packet header, which contains a large synchronization preamble. In this paper, we show that inter-packet redundancy is significantly more efficient than traditional MAC layer retransmissions, in terms of both network capacity and end-to-end delay. The key observations regarding our design and results are as follows. Because of the small payloads, introducing redundancy across packets only increases the packet transmission time slightly, and hence has negligible impact on the packet collision rate. Thus, we obtain large gains from redundant transmission essentially "for free." Because of the large packet header, elimination of ACKs leads to substantial bandwidth savings. Overall, a combination of inter-packet redundancy (at the MAC layer), path diversity (at the network layer), and multiple description source coding (at the application layer), is shown to provide significant improvements in bandwidth efficiency and delay.