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The Scientific World Journal
Volume 2014, Article ID 708798, 15 pages
Research Article

Design and Performance Evaluation of a Distributed OFDMA-Based MAC Protocol for MANETs

1Department of Information Security, The University of Suwon, Suwon 445-743, Republic of Korea
2School of Electrical and Electronics Engineering, Chung-Ang University, Seoul 156-756, Republic of Korea

Received 8 April 2014; Accepted 21 June 2014; Published 16 July 2014

Academic Editor: Yuxin Mao

Copyright © 2014 Jaesung Park et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In this paper, we propose a distributed MAC protocol for OFDMA-based wireless mobile ad hoc multihop networks, in which the resource reservation and data transmission procedures are operated in a distributed manner. A frame format is designed considering the characteristics of OFDMA that each node can transmit or receive data to or from multiple nodes simultaneously. Under this frame structure, we propose a distributed resource management method including network state estimation and resource reservation processes. We categorize five types of logical errors according to their root causes and show that two of the logical errors are inevitable while three of them are avoided under the proposed distributed MAC protocol. In addition, we provide a systematic method to determine the advertisement period of each node by presenting a clear relation between the accuracy of estimated network states and the signaling overhead. We evaluate the performance of the proposed protocol in respect of the reservation success rate and the success rate of data transmission. Since our method focuses on avoiding logical errors, it could be easily placed on top of the other resource allocation methods focusing on the physical layer issues of the resource management problem and interworked with them.