An Efficient Admission Control Model Based on Dynamic Link Scheduling in Wireless Mesh Network
EURASIP Journal on Wireless Communications and Networking
Wireless mesh networks (WMNs) are a very attractive new field of research. They are low cost, easily deployed and high performance solution to last mile broadband Internet access. In WMNs, admission control (AC) is one of the key traffic-management mechanisms that should be deployed to provide quality of service (QoS) support for real-time traffic. In this paper, we introduce a novel admission control model based on dynamic link scheduling, which integrates bandwidth and delay as parameters. The proposed model is based on two different access methods; on CSMA/CA for control packets and on dynamic TDMA (DTDMA) for data packets. The dynamic link scheduling is realized according to the flows requirement and network conditions while respecting signal-to-interference-plus-noise ratio (SINR); this allows establishing collision-free transmissions. Using extensive simulations, we demonstrate that our model achieves high resource utilization by improving throughput, establishing collision-free transmission as well as respecting requirements of admitted flows in terms of delay and bandwidth.