Joint network coding and power control for cellular radio networks

We investigate the problem of optimizing power consumption and bandwidth usage in cellular radio networks. In this paper we consider a wireless broadcast network, organized in cells, in which each transmitter wants to deliver the same amount of data to all receivers inside its cell. Traditionally, the transmitter in each cell radiates a fixed power at which the receiver at the border of the cell can receive, in theory, a signal whose energy is greater than its required threshold and satisfies condition of signal to noise and interference ratio (SIR). When a receiver in a cell receives an error packet, the transmitter in that cell will retransmit until the receiver receives it successfully. Instead in network coding approach, the transmitter will store index of the error packets, then it will consider combining them before sending out. The goal of this paper is to provide an analysis on the power consumption and bandwidth utilization of network coding techniques at the signal layer. Especially, we propose a novel technique in which network coding and adaptive power control are joined together to improve network performance. The simulation results show that our proposed technique substantially reduces power consumption while increases the network throughput compare with the traditional transmission technique, Automatic Repeat reQuest (ARQ).