Cross-layered OFDMA-based MAC and routing protocol for multihop adhoc networks

Authors:
Khanh Quang;Van Duc Nguyen;Trung Dung Nguyen;Hyunseung Choo
Affiliations:
School of Electronics and Telecommunications, Hanoi University of Science and Technology, Vietnam;School of Electronics and Telecommunications, Hanoi University of Science and Technology, Vietnam;School of Electronics and Telecommunications, Hanoi University of Science and Technology, Vietnam;School of Information & Communication Engineering, Sungkyunkwan University, Korea
Venue:
ICCSA'13 Proceedings of the 13th international conference on Computational Science and Its Applications - Volume 1
Year:
2013

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Abstract

In this paper, a dynamic Sub-channel Assignment Algorithm (DSA) based on orthogonal frequency division multiple access (OFDMA) technology operating in the time division duplexing (TDD) and a new routing protocol are proposed. The proposed of dynamic Sub-channel Assignment Algorithm solves several drawbacks of existing radio resource allocation techniques in OFDM system used in ad-hoc and multi-hop networks, such as the hidden and exposed node problem, mobility, co-channels interference in frequency (CCI). An interference avoidance mechanism allows the system to reduce CCI and to operate with full frequency re-use. The proposed routing protocol is jointed with the MAC protocol based the algorithm to ensure the mobility and multi-hop, thus the quality of service in ad-hoc and multi-hop networks is significantly improved.