Energy level performance of multi hop CDMA wireless sensor network with error control

Energy level performance of a multi hop CDMA wireless sensor networks is analyzed incorporating two popular error control schemes. Decoding is considered only at the sink which has enough power to run the complex decoding algorithms. In one case we consider a simple end-to-end ARQ, while the other case is based on hybrid ARQ type I (HARQ-I) using BCH code. The performance of the network is assessed in terms of energy consumption, and energy efficiency involved in successful transmission of a packet from source to sink via a number of hops. Two kinds of interference namely multiple access interference (MAI) and node interference (NI) are considered. The effects of several network parameters such as node density, packet length, error correcting capability on packet error rate (PER), energy consumption, and energy efficiency for successful reception of a packet at sink are investigated and compared for different error control strategies. Performance of the network system using hop by hop ARQ mechanism, where decoding is performed at every node, is also compared with the proposed schemes.