Lifetime maximization via cooperative nodes and relay deployment in wireless networks

— Extending lifetime of battery-operated devices is a key design issue that allows uninterrupted information exchange among distributed nodes in wireless networks. Cooperative communications has recently emerged as a new communication paradigm that enables and leverages effective resource sharing among cooperative nodes. In this paper, a general framework for lifetime extension of battery-operated devices by exploiting cooperative diversity is proposed. The framework efficiently takes advantage of different locations and energy levels among distributed nodes. First, a lifetime maximization problem via cooperative nodes is considered and performance analysis for Mary PSK modulation is provided. With an objective to maximize the minimum device lifetime under a constraint on bit-errorrate performance, the optimization problem determines which nodes should cooperate and how much power should be allocated for cooperation. Since the formulated problem is NP hard, a closed-form solution fo...

• Type: Journal
• Year: 2007
• Where: JSAC
• Authors: Thanongsak Himsoon, W. Pam Siriwongpairat, Zhu Han, K. J. Ray Liu
• Keywords: Cooperative, Cooperative Nodes, JSAC 2007, Minimum Device Lifetime