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http://dx.doi.org/10.5515/KJKIEES.2007.18.7.766

Design of Cooperative M-1-1 Protocol Using OFDM to Increase Spectrum Utilization in WSN  

Hwang, Yun-Kyeong (School of Electrical Engineering, University of Ulsan)
Kong, Hyung-Yun (School of Electrical Engineering, University of Ulsan)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.18, no.7, 2007 , pp. 766-773 More about this Journal
Abstract
Conventional wireless sensor network(WSN) has limited power and bandwidth. In order to develop multimedia sensor technology, high data rate communication systems are required. Cooperative communication system can help to decrease power consumption through spatial diversity. In cooperative transmission, one partner node assists one sensor node to transmit their data to destination. Instead of using M partners for M sensor nodes, we propose 1 partner for M sensor nodes. Proposed protocol offers similar diversity order as conventional one with much less bandwidth and hardware. It is able to almost reduce scattered nodes interference using orthogonal sub-carriers. In addition, we examined a power allocation between sensor nodes and relay that optimize the system performance.
Keywords
WSN; M-1-1 Protocol; OFDM; Cooperative Communication;
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