A Cross-Layer Approach for Congestion Control in Multi hop Mobile Ad Hoc Networks

A cross-layer based approach for improving TCP performance in Multihop Mobile Adhoc Networks (MANETs) is proposed in this paper. The proposed congestion triggering mechanism triggers congestion whenever the channel occupied ratio (COR) reaches a maximum threshold value and the received signal strength is less than a minimum threshold value. Following it, the congestion control scheme controls the data sending rate of the sender by determining available bandwidth, delay of its link and COR. Further, a fair resource allocation scheme is put forwarded. The proposed approach is simulated in network simulator-2 (NS-2). Simulation results illustrate the efficiency of our technique in terms of throughput, delivery ratio and delay.