EAOMDV-MIMC : A Multipath Routing Protocol for Multi-Interface Multi-Channel Mobile Ad-Hoc Networks
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EAOMDV-MIMC: A Multipath Routing Protocol for Multi-Interface Multi-Channel Mobile Ad-Hoc Networks Gin-Xian Kok · Chee-Onn Chow · Yi-Han Xu · Hiroshi Ishii
© Springer Science+Business Media New York 2013
Abstract Multipath routing has been proposed to improve performance of mobile ad-hoc networks (MANETs). However, due to: (1) nodes lacking of network interface and (2) route coupling, using multiple paths concurrently in conventional single channel MANETs rarely exhibit performance gain. To improve performance, an ad-hoc routing protocol (and its extension) that utilizes multiple homogeneous network interface is proposed in this paper. Unlike other related multi-channel routing protocols, channels are not assigned. Instead, nodes are allowed to make use of all available channels they are tuned to. In the base protocol, nodes estimate channel conditions by monitoring their network interface queues and distribute data packets to different channels and next-hops according to their conditions. In the extended protocol, estimated channel condition at a node is further propagated to neighboring nodes by piggybacking channel condition information in data packets. With overhearing, other nodes can retrieve this information to make better next-hop selections. Extensive simulation studies show that our protocol outperforms other related multi-channel routing protocols. Keywords Networks · Multi-interface · Multi-channel · Channel condition estimation · Load balancing · Concurrent multipath data transmission
G.-X. Kok · C.-O. Chow · Y.-H. Xu (B) Electrical Department, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia e-mail: [email protected] G.-X. Kok e-mail: [email protected] C.-O. Chow e-mail: [email protected] H. Ishii Department of Communication and Network Engineering, School of Information and Telecommunication Engineering, Tokai University, Tokyo, Japan e-mail: [email protected]
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1 Introduction Mobile ad-hoc networks (MANETs) are wireless communication networks characterized by: (1) infrastructure-less nature, (2) multi-hop packet transmissions and (3) nodes mobility. These properties make them highly desirable in war zones, disaster recovery, industrial, home and other scenarios where setting up a wired or wireless communication infrastructure is slow, expensive, difficult or impossible. Wireless transmissions are generally of broadcast nature. In single channel wireless networks (both infrastructure networks and MANETs), nearby nodes compete with each other for channel access [1,2]. These nodes are said to be of the same collision domain where a collision domain is a section of the network where data packets sent on a shared medium can collide with each other. To avoid collision, multiple access techniques coordinate nodes from the same collision domain to share the medium by making them take turns to use/access the medium. Clearly, the capacity of the medium available to a node will be reduced from this sharing. The situation is worse in MANETs due to their multi-h
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