TY - GEN
T1 - A cross-layer architecture to exploit multi-channel diversity with a single transceiver
AU - Patel, Jay A.
AU - Luo, Haiyun
AU - Gupta, Indranil
PY - 2007
Y1 - 2007
N2 - The design of multi-channel multi-hop wireless mesh networks is centered around the way nodes synchronize when they need to communicate. However, existing designs are confined to the MAC layer - they are based on either negotiation on a rendezvous control channel, or on optimistic synchronization. Both approaches scale poorly as the network grows in coverage and density. The rendezvous control channel may become the bottleneck, while optimistic synchronization may incur substantial overhead - especially amongst nodes close to a gateway, where the mesh traffic converges. In this paper, we describe Dominion - a cross-layer architecture that includes both medium access control and routing. At the MAC layer, a node switches channels in a deterministic manner to address the scalability issue. At the network layer, a Dominion node routes traffic along the shortest distance across both spatial and frequency domains, based on the deterministic channel-hopping schedule and network connectivity. Since the shortest distance path across the frequency domain is time variant, Dominion naturally spreads the packets of the same flow across multiple paths, relieving the intra-flow and inter-flow contention, and improving throughput. Through QualNet simulations we show that Dominion is able to achieve, on average, 1813 % higher aggregate distance-normalized throughput than IEEE 802.11, while being 1730% fairer (using Jain's fairness index) with 50 simultaneous random flows.
AB - The design of multi-channel multi-hop wireless mesh networks is centered around the way nodes synchronize when they need to communicate. However, existing designs are confined to the MAC layer - they are based on either negotiation on a rendezvous control channel, or on optimistic synchronization. Both approaches scale poorly as the network grows in coverage and density. The rendezvous control channel may become the bottleneck, while optimistic synchronization may incur substantial overhead - especially amongst nodes close to a gateway, where the mesh traffic converges. In this paper, we describe Dominion - a cross-layer architecture that includes both medium access control and routing. At the MAC layer, a node switches channels in a deterministic manner to address the scalability issue. At the network layer, a Dominion node routes traffic along the shortest distance across both spatial and frequency domains, based on the deterministic channel-hopping schedule and network connectivity. Since the shortest distance path across the frequency domain is time variant, Dominion naturally spreads the packets of the same flow across multiple paths, relieving the intra-flow and inter-flow contention, and improving throughput. Through QualNet simulations we show that Dominion is able to achieve, on average, 1813 % higher aggregate distance-normalized throughput than IEEE 802.11, while being 1730% fairer (using Jain's fairness index) with 50 simultaneous random flows.
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U2 - 10.1109/INFCOM.2007.261
DO - 10.1109/INFCOM.2007.261
M3 - Conference contribution
AN - SCOPUS:34548305169
SN - 1424410479
SN - 9781424410477
T3 - Proceedings - IEEE INFOCOM
SP - 2261
EP - 2265
BT - Proceedings - IEEE INFOCOM 2007
T2 - IEEE INFOCOM 2007: 26th IEEE International Conference on Computer Communications
Y2 - 6 May 2007 through 12 May 2007
ER -