IISA: An Inter-Cluster and Intra-Cluster Scheduling Algorithm Cluster-Based for Wireless Sensor Network

The MAC based on competition doesn't do any contribution in the energy savings, because it will lead to conflict, crosstalk, idle intercept and control expenses in communication. TDMA scheduling system based on the structure of cluster can effectively improve the scalability, save energy and does not increase node costs, but it also brought transmission interference between clusters. We proposed an Inter -cluster and Intra-cluster TDMA scheduling algorithm cluster-based (USA), each round of data collection time is divided by layers along down the data aggregation tree, each cluster node in the pool tree preserves its initial allocation work time and time control of the son tree. Nodes in accordance with their own work TDMA initial time can transmit data without any collision conflict. The simulation results show that, in the larger nodes density circumstances, the performance of USA is better than that of HEED.