| In a best effort networking environment, efficient and fair congestion control is highly desired for every traffic flow to share the bandwidth appropriately. We look at the multimedia congestion control issues from both distributed computation and end-to-end perspectives. Besides the implementation of multimedia conferencing and streaming applications over the extended contend distribution network, we propose a congestion control algorithm for streaming layered multimedia over wired/wireless channels and perform thorough evaluation in terms of scalability, convergence, fairness, and effectiveness of the proposed distributed computation algorithm, which uses a small portion of packet header to convey control signal along with the reserved packet length information to adapt to the staircase-like bandwidth of streaming layered multimedia. For end-to-end approach, the packet loss information serves as an index of network congestion for effective rate adjustment, wireless packet loss due to impaired wireless environment can mistakenly lead to dramatic performance degradation. For congestion control applied to end-to-end points at application layer, we propose an adaptive congestion control algorithm so that a receiver can acquire an appropriate share of bandwidth that is protected by adaptive Maximum Distance Separable erasure codes according to the estimation of wireless channel condition, packet loss classification, and end-to-end available bandwidth. |
