Enhanced Leach With Power Control And Its Performance Analysis

LEACH is one of the earliest proposed wireless sensor network protocols. In this paper the performance analysis is taken on'cluster head election algorithm'and'media access protocol'for LEACH, as well as developing a wireless sensor network simulation platform, in which the practical hardware parameters and typical application environment parameters are adopted. Through statistical experiments and analysis, the defects of LEACH are analyzed in details. The variance of number of cluster heads is large and the position of cluster heads is in generally not uniform, therefore the energy consumption is large and not uniform. Futuremore, the time of the process of network construction is too large because of lacking power control, the scale of network is limited, and the lifetime is short. To improve the quality of LEACH protocol, an"Enhanced LEACH with power control"is proposed in this thesis. The noval enhanced LEACH protocol can eliminate the case that no cluster head exist in one-third edge part of region by its'cluster head adjustment algorithm'. With power control strategy, the novel protocol can save energy by 8.26%, prolong lifetime by 5.81%. When power control and slotted ALOHA MAC technique are adopted in process of data transmission, the time of network construction process is reduced by 97.01%, even more, the scale of network is enlarged to thousands of nodes from five hundreds. In addition, under different data collection modes, I compare the slotted ALOHA with ACK and TDMA which are used for data collection in'clustering protocol with single-hop', in which I find the TDMA is more suitable for application of burst data collection, while slotted ALOHTA with ACK more suitable for stable data collection.