標題: | Optimal Number of Clusters in Dense Wireless Sensor Networks: A Cross-Layer Approach |
作者: | Wang, Li-Chun Wang, Chung-Wei Liu, Chuan-Ming 電信工程研究所 Institute of Communications Engineering |
關鍵字: | Cross-layer design;optimal number of clusters;wireless sensor networks |
公開日期: | 1-二月-2009 |
摘要: | Cluster-based sensor networks have the advantages of reducing energy consumption and link-maintenance cost. One fundamental issue in cluster-based sensor networks is determining the optimal number of clusters. In this paper, we suggest a physical (PRY)/medium access control (MAC)/network (NET) cross-layer analytical approach for determining the optimal number of clusters, with the objective of minimizing energy consumption in a high-density sensor network. Our cross-layer design can incorporate many effects, including lognormal shadowing and a two-slope path loss model in the PRY layer, various MAC scheduling, and multihop routing schemes. Compared with the base-line case with one cluster per observation area (OA), a sensor network with the proposed optimal number of clusters can reduce the energy consumption by more than 80% in some cases. We also verify by simulations that the analytical optimal cluster number can still effectively function, regardless of the different densities of sensors in various OAs. |
URI: | http://dx.doi.org/10.1109/TVT.2008.928637 http://hdl.handle.net/11536/12867 |
ISSN: | 0018-9545 |
DOI: | 10.1109/TVT.2008.928637 |
期刊: | IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY |
Volume: | 58 |
Issue: | 2 |
起始頁: | 966 |
結束頁: | 976 |
顯示於類別: | 會議論文 |