Cross-layer optimization in TCP/IP networks
IEEE/ACM Transactions on Networking (TON)
Network characteristics: modelling, measurements, and admission control
IWQoS'03 Proceedings of the 11th international conference on Quality of service
An improvement to multiple description transform coding
IEEE Transactions on Signal Processing
Asymptotic analysis of multiple description quantizers
IEEE Transactions on Information Theory
Multiple description coding in networks with congestion problem
IEEE Transactions on Information Theory
Price-based distributed algorithms for rate-reliability tradeoff in network utility maximization
IEEE Journal on Selected Areas in Communications
Cross-Layer Optimized Multipath Routing for Video Communications in Wireless Networks
IEEE Journal on Selected Areas in Communications
Towards Robust Multi-Layer Traffic Engineering: Optimization of Congestion Control and Routing
IEEE Journal on Selected Areas in Communications
Distributed video streaming using multiple description coding and unequal error protection
IEEE Transactions on Image Processing
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Providing real-time multimedia services over a besteffort network is challenging due to the stringent delay requirements in the presence of complex network dynamics. Multiple description (MD) coding is one approach to transmit the media over diverse (multiple) paths to reduce the detrimental effects caused by path failures or delay. The novelty of this work is to investigate the resource allocation in a network, where there are several competing MD coded streams. This is done by considering a framework that chooses the operating points for asymmetric MD coding to maximize total quality of the users, while these streams are sent over multiple routing paths. The framework is based on the theoretical modeling where we consider two descriptions and high source coding rate region approximated within small constants. We study the joint optimization of multimedia (source) coding and congestion control in wired networks. These ideas are extended to joint source coding and channel coding in wireless networks. In both situations, we propose distributed algorithms for optimal resource allocation. In the presence of path loss and competing users, the service quality to any particular MD stream could be uncertain. In such circumstances it might be tempting to expect that we need greater redundancy in the MD streams to protect against such failures. However, one surprising aspect of our study reveals that for large number of users who compete for the same resources, the overall system could benefit through opportunistic (hierarchical) strategies. In general networks, our studies indicate that the user composition varies from conservative to opportunistic operating points, depending on the number of users and their network vantage points.