DocumentCode :
1697489
Title :
Service Differentiation for the Bandwidth Request Scheme in Fixed IEEE 802.16 Networks
Author :
Chen, Kai ; Zhou, Yi ; He, Jianhua ; Tang, Zuoyin
Author_Institution :
Sch. of Inf. Security & Eng., Shanghai Jiaotong Univ., Shanghai
fYear :
2008
Firstpage :
718
Lastpage :
722
Abstract :
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.
Keywords :
access protocols; bandwidth allocation; broadband networks; quality of service; radio access networks; IEEE 802.16 network; QoS scheme; bandwidth allocation; broadband wireless access system; contention based bandwidth request scheme; medium access control layer; service differentiation; Bandwidth; Base stations; Channel allocation; IP networks; Information security; Physical layer; Standards development; Telecommunication traffic; Traffic control; WiMAX;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems for Communications, 2008. ICCSC 2008. 4th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1707-0
Electronic_ISBN :
978-1-4244-1708-7
Type :
conf
DOI :
10.1109/ICCSC.2008.157
Filename :
4536849
Link To Document :
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