p-RWBO： a novel low-collision and QoS-supported MAC for wireless ad hoc networks

• Published in: Science China. Information sciences Vol. 51; no. 9; pp. 1193 - 1203
• Main Authors: Long, KePing, Li, Yun, Zhao, WeiLiang, Wang, ChongGang, Sohraby, Kazem
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Science in China Press 01.09.2008; Springer Nature B.V
• Subjects: Ad hoc networks; Algorithms; Bandwidths; Collision dynamics; Computer Science; Differentiation; Information Systems and Communication Service; p-RWBO; Quality of service architectures; Wireless networks; 信息冲撞; 无线通信; 服务分化; MAC; wireless ad hoc networks; quality of service
• ISSN: 1009-2757; 1674-733X; 1862-2836; 1869-1919
• DOI: 10.1007/s11432-008-0122-1

QoS supported MAC mechanism is a key issue for supporting QoS in wireless ad hoc networks. A new backoff algorithm, named RWBO＋BEB, was proposed previ- ously to decrease the packet collision probability significantly. In this paper, it is explored how to make RWBO＋BEB support service differentiation in wireless ad hoc networks, and a novel proportional service differentiation algorithm, named p-RWBO, is proposed to allocate the wireless bandwidth according to the band- width ratio of each station. In p-RWBO, station n＇s walking probability （Pw,n） is selected according to its allocated bandwidth ratio. An analytical model is proposed to analyze how to choose Pw, n according to the bandwidth ratios of station n. The simulation results indicate that p-RWBO can differentiate services in terms of both bandwidth and delay.