A Feedback Based Scheme for Improving TCP Performance in Ad-Hoc Wireless Networks

Ad-hoc networks consist of a set of mobile hosts that communicate using wireless links, without the use of other communication support facilities (such as base stations). The topology of an ad-hoc network changes due to the movement of mobile hosts, which may lead to sudden packet losses and delays. Transport protocols like TCP, which have been built mainly for xed networks, misinterpret this loss as congestion and invoke congestion control. This leads to unnecessary retransmissions and loss of throughput. To overcome this problem, we propose a feedback scheme, whereby the source can distinguish between route failure and network congestion. The main idea is to inform the source by a Route Failure Noti cation(RFN) when the route is disrupted allowing the source to freeze its timers and stop sending packets (new or retransmitted) as long as the source cannot reach the destination. When the route is re-established, the source, on being informed through a Route Re-establishment Noti catio...

• Type: Conference
• Year: 1998
• Where: ICDCS
• Authors: Kartik Chandran, Sudarshan Raghunathan, S. Venkatesan, Ravi Prakash
• Keywords: Ad-Hoc Networks, Distributed And Parallel Computing, ICDCS 1998, Route Failures, Route Re-establishment