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Journal of Computer Networks and Communications
Volume 2019, Article ID 6826984, 13 pages
Research Article

Congestion-Adaptive and Delay-Sensitive Multirate Routing Protocol in MANETs: A Cross-Layer Approach

1School of Computer Science and Engineering, VIT, Vellore, India
2Department of Computer Science and Information Science, BITS Pilani K. K. Birla Goa Campus, Goa, India
3Department of Electrical and Electronics, BITS Pilani K. K. Birla Goa Campus, Sancoale, India

Correspondence should be addressed to Mahadev A. Gawas; moc.liamg@120291.swgvedaham

Received 15 August 2018; Accepted 25 March 2019; Published 29 May 2019

Academic Editor: Juraj Machaj

Copyright © 2019 Mahadev A. Gawas 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.


With a growing demand of multimedia communication over MANETs, to support quality of service (QoS), the MAC standards such as 802.11a/b/g operate with multiple data rates to efficiently utilize the limited resources. Since the wireless channel is shared among the neighbors in MANETs, determining delay-sensitive and congestion-aware routes using the IEEE 802.11 MAC is still a challenging problem. This paper proposes a novel cross-layer approach called congestion-adaptive and delay-sensitive multirate (CADM) routing protocol in MANETs. The CADM protocol exploits the cross-layer interaction between the network layer, MAC, and physical layer. The CADM accesses the correlation between data rate, congestion metric, and MAC delay in delay-sensitive applications to provide enhanced network efficiency in MANETs. The protocol discovers multiple node-disjoint routes and facilitates optimal data rates between the links based on the estimated delay to admit a flow with the certain delay requirement in multirate MANETs. The proposed CADM protocol discovers the route through less congested nodes and also actively handles the congestion if it occurs. The performance of the CADM protocol is comprehensively assessed through the simulation, which highlights the advantages of our cross-layer mechanism.