Clustering routing algorithm is an important and widely used method, which can prolong the lifecycle of WSN. Existing clustering algorithm due to the randomness of selecting the cluster head, it is inevitable that the agreement exists choosing cluster head unreasonable, node energy consumption unbalanced. To address the above issues, this paper presents an improved clustering routing algorithm LEACH-KED on the basis of the uniform clustering, and proceeds simulation analysis. The simulation results show that the improved algorithm is effective in extending the network life cycle. Keywords-LEACH; cluster head; optimal number of cluster head; LEACH-KED

In order to solve the poor performance of location in RSSI localization Algorithm, caused by the link between anchor nodes and node to be positioning, this paper presents a positioning algorithm, which chooses anchor nodes based on Link quality Select strategy (LS) in a wireless sensor network. The method combines LS which plays a key role in localization with Weighted Centroid Localization Algorithm. The theoretical analysis and simulation results show that it raises the node ratio which can be located, and the accuracy of positioning can be well improved. Keywords-received signal strength indicator; weighted centroid localization algorithm; link quality; wireless sensor networks I.