Dynamic Retransmission Limit Scheme for Routing in Multi-hop Ad hoc Networks
Résumé
In paper [2] and [3], we have studied the throughput and stability of forwarding queues in a wireless ad hoc network with random access channel. In this paper, we are focusing to draw benefit from the interaction of the MAC (governed by IEEE 802.11 or slotted aloha) and routing by defining a new cross-layer scheme for routing based on the limit number of retransmission. By adjusting dynamically and judiciously this parameter in a saturated network, we have realized that both stability and average throughput are significantly improved in linear symmetric networks: a gain of 100 % can be reached, while in asymmetric networks, we achieve a better average delay (resp. throughput) for each connection without changing the average throughput (resp. delay). A detailed performance study of our new scheme is presented using analytical and simulation evaluation.
Mots clés
Categories and Subject Descriptors C2 [Computer Systems Organization]: Computer Com-munication Networks
C4 [Computer Systems Organi-zation]: Performance of Systems
I6 [Computing Method-ologies]: Simulation and Modeling General Terms Ad-Hoc Networks
Cross Layer
Performance Evaluation
Routing
Algorithms