Link adaptation for real-time video communications in E-GPRS networks

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Link adaptation for real-time video communications in E-GPRS networks

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The authors investigate deployment of link adaptation techniques to enhance the performance of real-time video communications over time-varying error-prone environments. A novel link adaptation algorithm is proposed and analysed. Two approaches for link adaptation are investigated. The first approach aims to optimise video quality for a fixed channel allocation. The design criterion of the second approach is to maximise the overall access network throughput while maintaining the required video quality. The effectiveness of the algorithms is demonstrated for MPEG-4 coded video transmissions over simulated EGPRS networks. In addition, the effects of feedback delay, a noisy feedback channel and bursty channel errors on algorithm performance are investigated.

Inspec keywords: radio links; time-varying channels; delays; packet radio networks; channel allocation; radio access networks; video coding; cellular radio; data compression

Other keywords: real-time video communications; radio access network; link adaptation techniques; channel allocation; E-GPRS networks; feedback delay; time-varying error-prone environments; MPEG-4 coded video; noisy feedback channel; video quality; bursty channel errors

Subjects: Video signal processing; Mobile radio systems; Radio access systems; Image and video coding

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