Performance Analysis of Energy-Efficiency of Non-Coherent Cooperative Relays for Wireless Sensor Networks

센서 네트워크기반 협동 릴레이의 에너지 효율성 분석

  • Kwon, Eun-Mi (Dept. of Electronics Engineering, Ewha Womans University) ;
  • Kim, Jeong-Ho (Dept. of Electronics Engineering, Ewha Womans University)
  • 권은미 (이화여자대학교 전자공학과) ;
  • 김정호 (이화여자대학교 전자공학과)
  • Received : 2012.02.21
  • Accepted : 2012.05.18
  • Published : 2012.05.25

Abstract

The capacity criteria have been proposed in order to select a cooperative relay node in WSNs, under the environment where direct path has a poor link gain. This process may ensure the efficiency improvement of signal transfer between source and destination and reduction of energy consumption as well. Two criteria are incorporated to select a cooperative relay node. Firstly, calculate the energy gain ratio between the relay path and the direct path. These are defined as the ratio between the energy factors of 1/g and 1/B. Each stands for an inverse of direct path gain and relay path gain. Secondly, investigate the effects of relay node's usage in WSNs through the simulation in terms of energy consumption. In conclusion, using a selected cooperative relay node based on the selected criteria is effective in terms of both energy efficiency and capacity of WSNs especially when direct path gain is relatively low.

이동성이 있는 센서 노드나 매우 제한된 에너지 량을 사용할 수 있는 배터리 용량을 가진 센서 노드는 채널의 변화나 미세한 이동이 있더라도 정확한 네트워크 구성을 할 수 있어 한다. 본 논문에서는 무선 센서 네트워크 내에서 다수의 협동 릴레이 노드가 존재할 때 선택기준에 따라 SNR(Signal to Noise Ratio)과 릴레이 노드의 신호 증폭률 그리고 단말과 단말 간 직접적으로 통신하는 경우 경로의 이득의 변화에 따른 무선 센서네트워크의 단위 비트를 전송하는데 소모되는 에너지 효율에 대하여 분석하고 이에 따른 영향을 정량적으로 평가하였다. 전송용량의 이득과 에너지 소모에 있어서 이득이 있는 협동 릴레이 노드를 선택하여 직접 경로와 릴레이 경로의 복수의 경로를 사용함으로써 위상 비동기 협동 릴레이를 적용하는 센서네트워크 환경하에서 직접적으로 통신하는 경우대비 적은 에너지를 사용하여 무선 센서 네트워크 내에서 효율적으로 통신이 이루어 질 수 있음을 분석을 통해 확인하였다.

Keywords

References

  1. Misra, S., Seung Don Hong, Guoliang Xue, Jian Tang, "Constrained Relay Node Placement in Wireless Sensor Networks: Formulation and Approximations" IEEE/ACM Transactions on Networking, vol.18, issue 2, pp. 434-447, April 2010. https://doi.org/10.1109/TNET.2009.2033273
  2. Chakrapani, A. Malaney, R. Jinhong Yuan, "Energy Efficient Cooperative Communications using Location based Relaying" Communications Theory Workshop, pp. 105-109, 2009.
  3. Ha Nguyen Vu, Hyung-Yun Kong,"Adaptive Decode-and-Forward Cooperative Networks with Multiple Relay Nodes" Journal of the Korean Institute of Electromagnetic Engineering and Science, vol. 11, no. 1, MAR. 2011.
  4. Dejun Yang, Misra, S., Xi Fang, Guoliang Xue, Junshan Zhang, "Two-Tiered Constrained Relay Node Placement in Wireless Sensor Networks: Efficient Approximations" IEEE Communications Society Conference, vol.7, pp. 1-9, June 2010.
  5. Rahman, M.A.,Anwar, F..,Naeem, J.,Abedin, M.S.M., "A simulation based performance comparison of routing protocol on Mobile Ad-hoc Network (proactive, reactive and hybrid)" International Conference on Computer and Communication Engineering (ICCCE), pp.1-5, 2010.
  6. Xiaofeng Han, Xiang Cao, Lloyd, E.L., Chien-Chung Shen, "Fault-Tolerant Relay Node Placement in Heterogeneous Wireless Sensor Networks" IEEE Transactions on Mobile Computing, vol. 9, issue 5, pp. 643-656, 2010.
  7. Chakrapani, A. Malaney, R. Jinhong Yuan, "Energy Efficient Cooperative Communications using Location based Relaying" Communications Theory Workshop, pp. 105-109, 2009.
  8. EunMi Kwon and Jeong-Ho Kim, "Performance Comparison and Analysis of Non-coherent Cooperative Relays ofr Wireless Sensor Networks," Journal of IEEK, vol. 49, No. 5, 2012.