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A Distributed End-to-End Reservation Protocol for IEEE 802.11-Based Wireless Mesh Networks

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5 Author(s)
Carlson, E. ; Telecommun. Networks Group, Berlin Univ. of Technol. ; Prehofer, C. ; Bettstetter, C. ; Karl, H.
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This paper presents an end-to-end reservation protocol for quality-of-service (QoS) support in the medium access control layer of wireless multihop mesh networks. It reserves periodically repeating time slots for QoS-demanding applications, while retaining the distributed coordination function (DCF) for best effort applications. The key features of the new protocol, called "distributed end-to-end allocation of time slots for real-time traffic (DARE), are distributed setup, interference protection, and scheduling of real-time data packets, as well as the repair of broken reservations and the release of unused reservations. A simulation-based performance study compares the delay and throughput of DARE with those of DCF and the priority-based enhanced distributed channel access (EDCA) used in IEEE 802.11e. In contrast to DCF and EDCA, DARE has a low, nonvarying delay and a constant throughput for each reserved flow

Published in:

Selected Areas in Communications, IEEE Journal on  (Volume:24 ,  Issue: 11 )

Date of Publication:

Nov. 2006

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