A Multi-channel QoS Model for Random Access Systems
CNSR '09 Proceedings of the 2009 Seventh Annual Communication Networks and Services Research Conference
Service differentiation in OFDM-based IEEE 802.16 networks
EURASIP Journal on Wireless Communications and Networking - Special issue on OFDMA architectures, protocols, and applications
Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
A new CDMA-based bandwidth request method for IEEE 802.16 OFDMA/TDD systems
IEEE Communications Letters
An efficient negative acknowledgment method for CDMA-based ranging in IEEE 802.16 OFDMA systems
IEEE Communications Letters
Journal of Network and Computer Applications
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The WiMAX technology based on the IEEE802.16 standard is currently the most prospective candidate for broadband wireless access networks. One of the key issues is the design of the MAC layer, in particular the multiple access scheme. The IEEE 802.16 standard specifies different scheduling services with individual mechanisms for accessing the channel on the uplink. The non-real-time polling service and the best-effort service mainly rely on a contention mechanism to submit bandwidth requests to the base station. These two services are currently used for all types of traffic with unknown characteristics, i.e. typically all traffic except for some special VoIP connection with known codec. In this paper, we evaluate and compare the performance of the contention mechanisms for fixed and mobile WiMAX.