Performance Analysis of the IEEE 802.16 Wireless Metropolitan Area Network
DFMA '05 Proceedings of the First International Conference on Distributed Frameworks for Multimedia Applications
The Analysis of the Optimal Contention Period for Broadband Wireless Access Network
PERCOMW '05 Proceedings of the Third IEEE International Conference on Pervasive Computing and Communications Workshops
Performance analysis of exponential backoff
IEEE/ACM Transactions on Networking (TON)
Broadband Wireless Access - The Next Wireless Revolution
CNSR '06 Proceedings of the 4th Annual Communication Networks and Services Research Conference
An efficient QoS-based uplink scheduling scheme for IEEE 802.16e mobile stations
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
New contention resolution schemes for WiMAX
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Efficient polling mechanism in WiMAX network
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
A base station-coordinated contention resolution for IEEE 802.16 PMP networks
UIC'06 Proceedings of the Third international conference on Ubiquitous Intelligence and Computing
A review of contention resolution algorithms for IEEE 802.14 networks
IEEE Communications Surveys & Tutorials
IEEE Communications Magazine
IEEE 802.11 Wireless Local Area Networks
IEEE Communications Magazine
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To avoid collisions in WiMAX networks, the connections in Subscriber Stations (SSs) use a request-grant process to acquire transmission resources from the Base Station (BS). In accordance with the IEEE 802.16 standard, the request-grant process is accomplished using either a unicast polling method or a contention request method. In WiMAX systems, the number of bandwidth-request (BR) slots per frame is limited. Thus, to enhance the network performance, the BR slots must be used in the most efficient manner possible. In practical WiMAX systems, the offered network load varies over time, and thus the strict use of either the unicast polling method or the contention request method results in a poor utilization efficiency of the BR slots. Accordingly, the present study proposes a scheme designated as Efficiency-Driven Selection of Bandwidth Request (EDSBR), in which the request-grant mechanism is adjusted dynamically on a frame-by-frame basis in accordance with the network conditions. The performance of the proposed scheme is evaluated by simulations. The results show that EDSBR achieves a more efficient utilization of the BR slots than the unicast polling scheme or the contention request scheme, and therefore yields an improved network performance.