Opportunistic Weighted Fair Queueing

The ongoing evolution towards the generalization of wireless access to multi-service networks stresses on the need for optimizing the control of radio resources and in particular, for designing efficient scheduling approaches. The scheduling mechanisms proposed for wireline links do not carry over to wireless interfaces due to the variability of radio links capacity. Efficient schedulers for the radio channel have to take into account information relative to the channel state when allocating resources to the various connected equipments. For the case of delay tolerant traffic, the scheduler may take advantage of terminals diversity. We propose in this paper a modified version of the weighted fair queueing (WFQ) algorithm, termed OWFQ (opportunistic WFQ), that notably increases the average system performance through opportunistic scheduling while fulfilling users´ QoS needs in terms of minimum realized throughput.