Service Differentiation for the Bandwidth Request Scheme in Fixed IEEE 802.16 Networks

IEEE 802.16 standards have been developed as one of the technical solutions for broadband wireless access systems. It has high data rate, large network coverage, flexible QoS schemes and cheap network deployment. 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, contention based bandwidth request scheme can be used to indicate bandwidth demands to the base station for the non-real-time polling and best- effort services. These two services are used for most application with unknown traffic characteristics. Due to the diverse QoS requirements of those applications, service differentiation (SD) is anticipated over the contention based bandwidth request scheme. In this paper we investigate the SD with the bandwidth request scheme by means of assigning different channel access parameters and bandwidth allocation priorities. The effectiveness of the differentiation schemes are evaluated by simulations. It is observed that the initial backoff window can be efficient in SD, and if combined with the bandwidth allocation priority, the SD performances will be better.

[1]  Jianhua He,et al.  Modeling Contention Based Bandwidth Request Scheme for IEEE 802.16 Networks , 2007, IEEE Communications Letters.

[2]  Andrey M. Turlikov,et al.  WIRELESS BROADBAND ACCESS: WIMAX AND BEYOND - Investigation of Bandwidth Request Mechanisms under Point-to-Multipoint Mode of WiMAX Networks , 2007, IEEE Communications Magazine.

[3]  Hossam S. Hassanein,et al.  Performance Evaluation of Reservation Medium Access Control in IEEE 802.16 Networks , 2006, IEEE International Conference on Computer Systems and Applications, 2006..

[4]  Kun Yang,et al.  A Dynamic Bandwidth Reservation Scheme for Hybrid IEEE 802.16 Wireless Networks , 2008, 2008 IEEE International Conference on Communications.

[5]  Hyong-Woo Lee,et al.  Queueing Behavior of IEEE802.16 Random Access Protocol for Sporadic Data Transmissions , 2006, Proceedings of 15th International Conference on Computer Communications and Networks.

[6]  Juanjuan Yan,et al.  Cross-layer Design of Optimal Contention Period for IEEE 802.16 BWA Systems , 2006, 2006 IEEE International Conference on Communications.

[7]  Ying Zhang,et al.  Performance Analysis of the Random Access in IEEE 802.16 , 2005, 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications.

[8]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[9]  Hsiao-Hwa Chen,et al.  Application of IEEE 802.16 Mesh Networks as the Backhaul of Multihop Cellular Networks , 2007, IEEE Communications Magazine.

[10]  Hyong-Woo Lee,et al.  Queueing Performance of IEEE 802.16 Random Access Protocol with Bulk Transmissions , 2007, 2007 IEEE International Conference on Communications.

[11]  Luciano Lenzini,et al.  Performance Evaluation of the IEEE 802.16 MAC for QoS Support , 2007, IEEE Transactions on Mobile Computing.

[12]  D. Staehle,et al.  Comparative Study of the IEEE 802.16 Random Access Mechanisms , 2007, The 2007 International Conference on Next Generation Mobile Applications, Services and Technologies (NGMAST 2007).