TY - JOUR
T1 - A simulation study of service differentiation for the bandwidth request scheme in fixed IEEE 802.16 network
AU - Zhou, Yi
AU - Qi, Kai-yue
AU - Chen, Jian-bo
AU - Chen, Kai
AU - He, Jian-hua
PY - 2009/6
Y1 - 2009/6
N2 - Various flexible mechanisms related to quality of service (QoS) provisioning have been specified for uplink traffic at the medium access control (MAC) layer in the IEEE 802.16 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 applications 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 at different packets arrival probability. The effectiveness of the differentiation schemes is 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.
AB - Various flexible mechanisms related to quality of service (QoS) provisioning have been specified for uplink traffic at the medium access control (MAC) layer in the IEEE 802.16 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 applications 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 at different packets arrival probability. The effectiveness of the differentiation schemes is 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.
KW - IEEE 802.16
KW - WiMAX
KW - medium access control
KW - service differentiation
UR - http://www.scopus.com/inward/record.url?scp=67649191543&partnerID=8YFLogxK
UR - http://link.springer.com/article/10.1007%2Fs12204-009-0338-2
U2 - 10.1007/s12204-009-0338-2
DO - 10.1007/s12204-009-0338-2
M3 - Article
AN - SCOPUS:67649191543
SN - 1007-1172
VL - 14
SP - 338
EP - 342
JO - Journal of Shanghai Jiaotong University
JF - Journal of Shanghai Jiaotong University
IS - 3
ER -