Due to the shared nature of the wireless medium, contention occurs among the nodes along a multi-hop path, which leads to intra-flow contention. In this paper, we use the selforganizing paradigms presented in [1] to design a new Qos-routing intra-flow contention-based protocol for wireless ad hoc networks, called SQUIRREL. The admission control component of SQUIRREL, called : Scalable and Accurate Admission control (SAICAC), has two variants : SAICAC-Power and SAICAC-CS. SAICAC-Power estimates channel bandwidth availability through high power transmissions and SAICAC-CS through passive monitoring of the channel. SQUIRREL can ensure all the properties of a self-organizing system contrary to the existing intra-flow contention-based protocols. Our analytical study demonstrates that SAICAC can achieve the best results in terms of message overhead, delay, and scalability.
