KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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Transmission Power Minimization with Network Coding for Mobile Terminals in Cellular Relay Networks

  • Du, Guanyao (School of Computer and Information Technology, Beijing Jiaotong University) ;
  • Xiong, Ke (School of Computer and Information Technology, Beijing Jiaotong University) ;
  • Li, Dandan (School of Computer and Information Technology, Beijing Jiaotong University) ;
  • Qiu, Zhengding (School of Computer and Information Technology, Beijing Jiaotong University)
  • Received : 2012.06.05
  • Accepted : 2012.08.23
  • Published : 2012.09.30
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Abstract

This paper jointly investigates the bandwidth allocation, transmission strategy and relay positions for two-way transmission aware cellular networks with network coding (NC). Our goal is to minimize the transmission power of mobile terminals (MTs). Consider a cellular system, where multiple MTs exchange information with their common base station, firstly, we propose an efficient bandwidth allocation method and then give a transmission strategy for each MT to determine whether to use relay stations (RSs) for its two-way transmission with the BS or not. To further improve the system performance, the optimal positions of RSs are also jointly discussed. A GA-based algorithm is presented to obtain the optimum positions for RSs. Besides, the impacts of frequency reuse on MT's transmission power and system spectral efficiency (SE) under different number of relays are also discussed in our work. Numerical results show that the proposed NC aware scheme can extend MTs' battery life at least 6% more than traditional method.

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References

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