The Scheme of Power Allocation for Decode-and-Forward Relay Channel in Energy Harvesting WSNs

Jianli Xie, Cuiran Li
2016 International Journal of Future Generation Communication and Networking  
Recently, the issue of excessive energy consumption in wireless communications has become increasing critical, and the energy harvesting as a renewable energy resource, has received extensive attractions. In this paper, a wireless sensor network (WSN) is considered, where the source-destination pair communicates via an energy harvesting relay links. We study the problem of the harvested energy distribution among the source, relay and destination nodes. An effective power allocation scheme is
more » ... eloped which exploits the decode-and-forward (DF) relaying strategy and channel state information. The outage probability is analyzed and simulation results show that the outage performance for two sub-channels is always performs well in the cases of different threshold target data rate. Moreover, the effect of the different radio of the optimal subchannel gain and Rayleigh channel gain on the outage performance is evaluated. 249 targeted date rate, when the number of sub-channels for source-relay node pair is set to two, as well as the number of relay-destination node pair. There might be some changing with the optimal number of sub-channels for source-relay node pair, as well as the number of relay-destination node pair, by varying the channel bandwidth. This is a promising future direction for effective power allocation and further performance improvement. [22] T. Lie, "Study of speed-dependent packet error rate for wireless sensor on rotating mechanical structures", IEEE Trans.
doi:10.14257/ijfgcn.2016.9.12.22 fatcat:unm4kxd4lfd4dcebdazfp36ste