Experimentations for QoS Evaluation of Publish/Subscribe Systems Deployed on Ad-hoc Network

Publish/subscribe (P/S) systems have been widely studied and applied in wired networks. However, their deployment on mobile ad hoc networks still presents a lot of challenges especially when there are quality of service (QoS) requirements. In this paper, we approach these challenges by looking first at network routing protocols. We present experimentations that allow to study the reaction of these protocols against QoS degradation that occur at the middleware layer. Based on an empirical study, we show that the routing layer is generally not aware about QoS degradations and so it does not react when they occur. Thus, a reaction in the middleware layer have to be developed in order to achieve a reasonable performance.