DocumentCode :
1826780
Title :
Architecture and algorithms for an IEEE 802.11-based multi-channel wireless mesh network
Author :
Raniwala, Ashish ; Chiueh, Tzi-cker
Author_Institution :
Dept. of Comput. Sci., State Univ. of New York, Stony Brook, NY, USA
Volume :
3
fYear :
2005
fDate :
13-17 March 2005
Firstpage :
2223
Abstract :
Even though multiple non-overlapped channels exist in the 2.4 GHz and 5 GHz spectrum, most IEEE 802.11-based multi-hop ad hoc networks today use only a single channel. As a result, these networks rarely can fully exploit the aggregate bandwidth available in the radio spectrum provisioned by the standards. This prevents them from being used as an ISP´s wireless last-mile access network or as a wireless enterprise backbone network. In this paper, we propose a multi-channel wireless mesh network (WMN) architecture (called Hyacinth) that equips each mesh network node with multiple 802.11 network interface cards (NICs). The central design issues of this multi-channel WMN architecture are channel assignment and routing. We show that intelligent channel assignment is critical to Hyacinth´s performance, present distributed algorithms that utilize only local traffic load information to dynamically assign channels and to route packets, and compare their performance against a centralized algorithm that performs the same functions. Through an extensive simulation study, we show that even with just 2 NICs on each node, it is possible to improve the network throughput by a factor of 6 to 7 when compared with the conventional single-channel ad hoc network architecture. We also describe and evaluate a 9-node Hyacinth prototype that Is built using commodity PCs each equipped with two 802.11a NICs.
Keywords :
ad hoc networks; channel allocation; telecommunication network routing; wireless LAN; Hyacinth; IEEE 802.11; ISP; channel assignment; intelligent channel assignment; multi-channel wireless mesh network; multihop ad hoc networks; network interface cards; network throughput; radio spectrum; routing; wireless enterprise backbone network; wireless last-mile access network; Ad hoc networks; Aggregates; Bandwidth; Distributed algorithms; Mesh networks; Network interfaces; Routing; Spine; Spread spectrum communication; Wireless mesh networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
INFOCOM 2005. 24th Annual Joint Conference of the IEEE Computer and Communications Societies. Proceedings IEEE
ISSN :
0743-166X
Print_ISBN :
0-7803-8968-9
Type :
conf
DOI :
10.1109/INFCOM.2005.1498497
Filename :
1498497
Link To Document :
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