Trust-based delegation for Ad Hoc QoS enhancing

The importance of resources and services availability in Ad Hoc networks has already been proved several times in the past. It concerns, essentially, node availability as well as routing and forwarding actions accessibility. Unfortunately, nodes´ lifetimes may be reduced or even depleted which leads to route failure, packets loss, QoS deterioration, etc. This is mainly due to a battery problem that can be caused by a legitimate consumption or by an attacker. To mitigate this problem and in order to allow nodes perpetuity and to face up any unavailability or flinching, a sharing of nodes´ permissions can be used. Delegation is a common practice that is used to simplify and to manage this kind of sharing. Our proposition is then, to use a delegation process in order to enhance the QoS of Ad hoc networks by allowing the perpetuity of routes without stopping the packets transfer nor the re-calculation of a novel route. In view of the importance of the issue, we propose to base delegation on trust relations. Trust is a security concept generally used to provide collaborating network entities with a mean to counter their uncertainty. The main contribution in this paper is then, the proposition of a trust based delegation model for Ad Hoc networks in order to enhance QoS and specially routes availability.