Precise Admission Control for Bandwidth Reservation in Wireless Mesh Networks

Quality of service in wireless mesh networks is an often requested feature for various kinds of applications. A common approach is the establishment of routes based on hop-by-hop reservation of bandwidth. In this paper we address the problems of admission control in wireless mesh networks. We show that the existing solutions suffer from temporal inconsistencies during the distributed admission process, which lead to high admission failure rates of approximately 2% to 10% in typical topologies, even with the best approach. A solution for this problem is presented, based on the two phase commit protocol. It prevents inconsistencies and the corresponding admission failures.