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Journal of Information Science and Engineering, Vol. 26 No. 4, pp. 1429-1442 (July 2010)

DCLS: A Fair and Efficient Scheduling with Bandwidth Guarantee in WiMAX Mesh Networks*

TEIN-YAW CHUNG, HUAI-LEI FU AND HSIAO-CHIH LEE
Department of Computer Science and Engineering
Yuan Ze University
Chungli, 320 Taiwan

Striking balance between throughput and fairness is a challenging issue in a wireless mesh network because of interference among links. This work proposed a Dynamic Clique-based Link Scheduling algorithm (DCLS) with minimal bandwidth guarantee for a WiMAX mesh backhaul network. DCLS includes two phases. First, it exploits a novel scheme based on cliques to maximize parallel transmission and ensure minimum bandwidth guarantee. Second, it employs a bandwidth tracking scheduling to enhance fairness among users. Simulation results show that DCLS performs better than existing scheduling schemes in network throughput and fairness.

Keywords: clique set, bandwidth guarantee, dynamic link scheduling, spatial reuse, WiMAX

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Received May 6, 2008; revised March 26, 2009; accepted April 30, 2009.
Communicated by Makoto Takizawa.
* This paper was supported by the National Science Council, Taiwan, R.O.C. under Contract No. NSC96- 2221-E-155-033 and NSC97-2218-E-155-006.