Performance of OLSR in MANETs with Cross-Layer Metrics and TCP/UDP Flows

Abstract

This paper investigates traffic related performance for TCP/UDP-based traffic flows in a MANET powered by OLSR with various routing metrics. Besides the ETX (expected transmission count), an alternative is proposed that resorts on a cross-layer approach to obtain PER (packet error rate) estimates from the physical layer. Throughput and latency performance are evaluated for various configurations of traffic flows and network size in a specifically developed simulation environment. It is seen that the PER-based alternative may outperform the ETX-based alternative in most configurations, by providing better support for transport layer protocol behaviours (e.g. TCP window size).

Different TCP Agents for Evaluating Performance of OLSR Routing Protocol in MANETS

“…Colizza et al, [18], proposed the performance of OLSR with Cross-Layer and TCP/UDP flows in MANETs by using OMNET++ simulator for studying the performance via ETX (Expected Transmission count) and PER (packet error rate) metrics. In their result, PER metrics enable better performance, when the traffic load supported by the network is large enough, also to enable support of QoS requirements.…”