IEEE 802.11 MAC based Multi-hop Reservation and Backoff Scheme in MIMC Tactical Ad Hoc Networks

Cho, Youn-Chul; Yoon, Sun-Joong; Ko, Young-Bae

doi:2012.15.1.16

J. KIMS Technol > Volume 15(1); 2012 > Article

Journal of the Korea Institute of Military Science and Technology 2012;15(1):16-27.
DOI: https://doi.org/10.9766/KIMST.2012.15.1.016

IEEE 802.11 MAC based Multi-hop Reservation and Backoff Scheme in MIMC Tactical Ad Hoc Networks

Youn-Chul Cho, Sun-Joong Yoon, Young-Bae Ko

¹
²
³Ajou University

전술 애드 혹 네트워크에서 다중 홉 전송을 위한 자원 예약 및 백오프 기법

조윤철, 윤선중, 고영배

¹(주)엠에이
²육군 전투지휘훈련단
³아주대학교

Abstract

In multi-interface multi-channel(MIMC) based tactical ad hoc networks, QoS support for required operational capacity is one of the main challenging issues for multi-hop transmissions. To support QoS in such a harsh environment, we propose a novel MAC scheme to minimize multi-hop as well as per-hop delay. The current IEEE 802.11 MAC protocols should contend to reserve the channel resource at every hop by each sender. The every-hop channel contention results in a degradation of end-to-end delay for multi-hop transmissions. The basic idea of our scheme is to make a "multi-hop reservation" at the MAC layer by using the modified RTS frame. It contains additional information such as destination information, packet priority, and hop count, etc. In addition, we differentiate the contention window area according to the packet priority and the number of hops to deliver packets in the predefined allowed latency. Our scheme can minimize the multi-hop delay and support the QoS of the critical data in real time(i.e., VoIP, sensing video data, Video conference between commanders). Our simulation study and numerical analysis show that the proposed scheme outperforms the IEEE 802.11 MAC.

Key Words: Tactical Ad Hoc Network, Multi-hop MAC, Back-off, Multiple-interface Multiple-Channel(MIMC)