An Analytical Model for Optimum Byte-Level and Packet-Level FEC Assignment Using Buffer Dynamics

[摘要] This letter presents an analytical model that jointly exploits the buffer dynamics of both thesending and receiving nodes to find the optimum number of byte-level and packet-level forward errorcorrection (FEC) units for real-time multimedia transmission over wireless networks. Theproposed analytical model first provides an optimum number of FEC units required at the byte-level, and then chooses the number of FEC units at the packet-level based on current channel andnetwork conditions. The accuracy of the proposed model is dependent on two parameters: thevariable deadline-time at the byte-level and fixed round-trip time (RTT) delay at the packet-level.Numerical results demonstrate the effectiveness of the model in reducing the unrecoverable errorprobability, which is achieved when the byte-level FEC scheme is supplemented by the packet-levelFEC scheme.

[学科分类] 电子、光学、磁材料