Quality-of-Service Routing Optimization in Mobile WiMAX Networks Using Cross-Layer Feedback Loops

International Journal of Computer Science and Technology | Vol. 8, No. 4, April 2006 | pp. 25–32

DOI: 10.46882/2006/IJCST/080419

Research Article

Title: Quality-of-Service Routing Optimization in Mobile WiMAX Networks Using Cross-Layer Feedback Loops

Names of Authors: Ousmane Diop¹, Sarah Jenkins²

Authors’ Affiliations: ¹Département de Génie Électrique, Université Cheikh Anta Diop, Dakar, Senegal; ²Department of Computer Science and Electrical Engineering, University of Maryland, Baltimore, USA

Abstract:
Maintaining strict Quality-of-Service (QoS) guarantees for real-time video streaming over IEEE 802.16 mobile WiMAX architectures is difficult due to variable link quality. This study develops a QoS-aware routing protocol driven by cross-layer feedback loops between the Media Access Control (MAC) layer and the Network routing plane. The protocol monitors channel quality indicators (CQI) and slot allocation metrics to dynamically route high-priority data packets along stable paths. Network simulations with 100 mobile nodes moving at speeds up to 60 km/h show that the cross-layer protocol drops average end-to-end delay to less than t = 38 ms, which is a 31.4% improvement over standard single-layer ad-hoc routing. The jitter index fell by 24.5 ms ± 3.2 ms under heavy network loads, and the connection throughput rose by μ = 1.64 Mbps. These enhancements confirm the model can support steady video transmissions over wireless broadband connections.

Keywords: WiMAX Networks, Quality of Service, Cross-Layer Optimization, Routing Protocol, Mobile Broadband

Manuscript Timeline: Received January 08, 2006; Revised February 20, 2006; Accepted March 14, 2006; Published April 21, 2006

Citation: Diop, O., & Jenkins, S. (2006). Quality-of-Service Routing Optimization in Mobile WiMAX Networks Using Cross-Layer Feedback Loops. International Journal of Computer Science and Technology, 8(4), 25–32.

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