Cooperative bridges: topology control in cooperative wireless ad hoc networks

Authors:
Jieun Yu;Heejun Roh;Wonjun Lee;Sangheon Pack;Ding-Zhu Du
Affiliations:
Network Research Lab., Dept. of Computer Science and Engineering, WCU FNOT Research Center, Korea University, Seoul, Rep. of Korea;Network Research Lab., Dept. of Computer Science and Engineering, WCU FNOT Research Center, Korea University, Seoul, Rep. of Korea;Network Research Lab., Dept. of Computer Science and Engineering, WCU FNOT Research Center, Korea University, Seoul, Rep. of Korea;WCU FNOT Research Center, School of Electrical Engineering, Korea University, Seoul, Rep. of Korea;Dept. of Computer Science, Erik Josson School of Engineering and Computer Science, University of Texas at Dallas, Richardson, TX
Venue:
INFOCOM'10 Proceedings of the 29th conference on Information communications
Year:
2010

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Abstract

Cooperative Communication (CC) is a technology that allows multiple nodes to simultaneously transmit the same data. It can save power and extend transmission coverage. However, prior research work on topology control considers CC only in the aspect of energy saving, not that of coverage extension. We identify the challenges in the development of a centralized topology control scheme, named Cooperative Bridges, which reduces transmission power of nodes as well as increases network connectivity. We observe that CC can bridge (link) disconnected networks. We propose two algorithms that select the most energy efficient neighbor nodes, which assist a source to communicate with a destination node; an optimal method and a greedy heuristic. In addition, we consider a distributed version of the proposed topology control scheme. Our findings are substantiated by an extensive simulation study, through which we show that the Cooperative Bridges scheme substantially increases the connectivity while consuming a similar amount of transmission power compared to other existing topology control schemes.