Impact of practical models on power aware broadcast protocols for wireless ad hoc and sensor networks

The existing power aware broadcast protocols for wireless ad hoc and sensor networks assume the impractical model where two nodes can communicate if and only if they exist within their transmission radius. In this paper, we consider practical models for power aware broadcast protocols. First, we employ a universal and widely-used statistic shadowing model for physical layer where nodes can only indefinitely communicate near the edge of the communication range. Second, we consider two MAC layer model: EER (end-to-end retransmission) and HHR (hop-by-hop retransmission). Third, omni-antennas and directional antennas are dealt with separately. Next, we improve the reception probability function proposed in (I. Stojmenovic et al., 2004) and analyze how to choose the transmission radius between transmission nodes and relay nodes to get the trade-off between maximizing probability of delivery and minimizing energy consumption. From our analysis based on practical models, we have derived the optimal transmission range. The results presented in this paper are expected to improve the performance of power aware broadcast protocols in practical environments