Highly dynamic Destination-Sequenced Distance-Vector routing (DSDV) for mobile computers
SIGCOMM '94 Proceedings of the conference on Communications architectures, protocols and applications
Characterizing achievable rates in multi-hop wireless mesh networks with orthogonal channels
IEEE/ACM Transactions on Networking (TON)
The capacity of wireless networks
IEEE Transactions on Information Theory
Stability and capacity of regular wireless networks
IEEE Transactions on Information Theory
Performance analysis of the IEEE 802.11 distributed coordination function
IEEE Journal on Selected Areas in Communications
Saturation throughput analysis of IEEE 802.11e enhanced distributed coordination function
IEEE Journal on Selected Areas in Communications
Performance analysis of IEEE 802.11e contention-based channel access
IEEE Journal on Selected Areas in Communications
Capacity of ad hoc wireless networks with infrastructure support
IEEE Journal on Selected Areas in Communications
Quality of service provisioning in 802.11e networks: challenges, approaches, and future directions
IEEE Network: The Magazine of Global Internetworking
An admission control algorithm for multi-hop 802.11e-based WLANs
Computer Communications
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Recently, wireless local area network (WLAN) hotspots have been deployed in many areas (e.g., cafes, airports, university campuses). The new IEEE 802.11e standard further provides quality of service (QoS) provisioning by grouping the applications (or traffic) into four different access categories. The coverage area of WLANs can be extended by allowing the neighboring mobile devices to relay data to the access points. This concept is known as multi-hop WLANs. Due to the limited network capacity and the contention-based channel access mechanism, admission control is required to regulate the number of simultaneous flows to maintain QoS. The multi-hop extension of WLANs present further challenges for admission control design due to the location-dependent contention in the network. In this paper, we propose an admission control algorithm for multi-hop 802.11e WLANs. The admission control algorithm first constructs the network's contention graph to break down the network contention situation into areas comprised of maximal cliques. Then, the admission decision is made by analyzing the available capacity of each maximal clique with 802.11e saturation throughput analysis. Simulation results show that our proposed algorithm is effective in providing QoS guarantee to the existing voice and video flows while maintaining a good performance for best effort traffic.