Ehsan Kharati - Computer and Software DepartmentIslamic Azad University – Branch ArakArak, Iran

In the paper, we want indefeasible tradeoff between network utility and network lifetime for ene rgy constrained wireless sensor networks. By introducing we combine these two objectives utility and network lifetime intoa single objective and next we decompose the tradeoff model into congestion control and routing and the network lifetime. Also we propose three distributed algorithms to solve this problem by using gradient methods. We compared this algorithms with related work that explanatory more convergence proposed algorithms. In addition in third algorithm, we sight two characteristic, the real time and reliable communication and compared with related work that explanatory decrease more error rate and packet loss and increase rate send and receive data.

Reliable Communication Real Time; Tradeoff;Network Lifetime; Utility; Wireless Sensor Networks