Performance Evaluation of the IEEE 802.16 MAC for QoS Support
IEEE Transactions on Mobile Computing
Comparative Study of the IEEE 802.16 Random Access Mechanisms
NGMAST '07 Proceedings of the The 2007 International Conference on Next Generation Mobile Applications, Services and Technologies
Performance Evaluation of Reservation Medium Access Control in IEEE 802.16 Networks
AICCSA '06 Proceedings of the IEEE International Conference on Computer Systems and Applications
An efficient energy saving mechanism for IEEE 802.16e wireless MANs
IEEE Transactions on Wireless Communications
Unified collision-free coordinated distributed scheduling (CF-CDS) in IEEE 802.16 mesh networks
IEEE Transactions on Wireless Communications
Application of IEEE 802.16 Mesh Networks as the Backhaul of Multihop Cellular Networks
IEEE Communications Magazine
IEEE Journal on Selected Areas in Communications
An Effective QoS Differentiation Scheme for Wireless Mesh Networks
IEEE Network: The Magazine of Global Internetworking
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IEEE 802.16 network is widely viewed as a strong candidate solution for broadband wireless access systems. Various flexible mechanisms related to QoS provisioning have been specified for uplink traffic at the medium access control (MAC) layer in the standards. Among the mechanisms, bandwidth request scheme can be used to indicate and request bandwidth demands to the base station for different services. Due to the diverse QoS requirements of the applications, service differentiation (SD) is desirable for the bandwidth request scheme. In this paper, we propose several SD approaches. The approaches are based on the contention-based bandwidth request scheme and achieved by the means of assigning different channel access parameters and/or bandwidth allocation priorities to different services. Additionally, we propose effective analytical model to study the impacts of the SD approaches, which can be used for the configuration and optimization of the SD services. It is observed from simulations that the analytical model has high accuracy. Service can be efficiently differentiated with initial backoff window in terms of throughput and channel access delay. Moreover, the service differentiation can be improved if combined with the bandwidth allocation priority approach without adverse impacts on the overall system throughput.