Delay and rate based multichannel scheduling for heterogeneous traffic

A multichannel scheduling based on an extension of modified largest weighted delay first (M-LWDF) scheduling is proposed for heterogeneous traffic. We consider the downlink of an orthogonal frequency division multiplexing (OFDM) system where the wireless channel and queue state information are taken into account to schedule delay-sensitive and ratesensitive traffic. We propose a logarithmic notion of M-LWDF scheme, denoted LOG-M-LWDF, and we prove its stability analytically. The simulation results show that the proposed scheduling scheme outperforms M-LWDF in terms of service delay performance.