DocumentCode :
1483436
Title :
Geographic Transmission with Optimized Relaying (GATOR) for the Uplink in Mesh Networks
Author :
Choi, Byonghyok ; Wong, Tan F. ; Shea, John M.
Author_Institution :
Univ. of Florida, Gainesville, FL, USA
Volume :
11
Issue :
6
fYear :
2012
fDate :
6/1/2012 12:00:00 AM
Firstpage :
2095
Lastpage :
2105
Abstract :
We consider communication in the uplink of a wireless mesh or sensor network. A group of mobile radios or sensors (“nodes”) have information to transmit to one or more access points (APs). When the channels from the nodes to the APs suffer from fading, direct transmissions to the APs may have a high failure probability, and packets may need to be relayed through other nodes. In conventional routing, the relay is preselected, and hence fading may cause a high failure probability at the router. Geographic approaches can improve performance through opportunistic reception, in which a relay is selected from those nodes that receive the packet correctly and move it toward the AP. Existing geographic transmission schemes use an ad hoc design for the protocol that selects the relay node. In this paper, we propose Geographic Transmission with Optimized Relaying (GATOR), which provides a mathematical design for relay selection in a time-slotted geographic communication scheme. For path-loss exponent two, the relay selection scheme simplifies to depend on circular regions around the destination. Simulation results show that GATOR provides better performance than direct transmission, routing, and other geographic transmission schemes, especially when the signal-to-noise ratios are low and APs are sparse.
Keywords :
mobile radio; probability; routing protocols; wireless mesh networks; wireless sensor networks; GATOR; access points; failure probability; geographic transmission optimized relaying scheme; mathematical design; mobile radios; opportunistic reception; path-loss exponent; protocol; relay node; relay selection scheme; router; signal-to-noise ratios; time-slotted geographic communication scheme; wireless mesh network; wireless sensor network; Fading; Protocols; Relays; Routing; Strontium; Wireless communication; Wireless sensor networks; Geographic transmission; multiuser diversity; opportunistic reception;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2012.032812.110468
Filename :
6177984
Link To Document :
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