Distributed admission control in 802.11e-based MANETs: From theory to practice

Providing Quality of Service (QoS) in wireless ad-hoc networks is an extremely complex task due to issues such as mobility, channel contention, and interference. Over the past years, several algorithms have been presented with the aim of providing QoS support in these environments; specifically, a lot of work has been done in the creation of a reliable admission control mechanism since it has been proved to be a fundamental element for QoS support in ad-hoc networks. In this paper we present a real implementation of DACME, a distributed admission control system for mobile ad-hoc networks, and we test its effectiveness in an IEEE 802.11e enabled testbed. Experimental results show that the solution developed is able to achieve good QoS levels, offering sustained bandwidth and bounded delay. Also, since DACME operates on an end-to-end basis, no restrictions are imposed on intermediate nodes.