Optimization of Energy Consumptions in Sensor Networks
STEVENS INST OF TECH HOBOKEN NJ
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The purpose of this paper is to minimize the energy consumption for a single link communication in wireless sensor network. The quadrature amplitude modulation QAM and auto repeat request ARQ with finite retry limit and various packet size are considered in the system model. We formulate the optimization problem to be a nonlinear integer programming with modulation order and packet size as variables. To solve this problem, the continuous relaxation based branch and bound method and the successive quadratic programming SQP algorithm is used. Further, a variable transformation method is adopted to convexificate the problem and guarantee the global optimization. A numerical example is given to illustrate the solution, which suggests that the joint optimization of packet size and modulation order for various communication distance can make the sensor nodes work in a more energy efficient way.
- Non-electrical Energy Conversion
- Radio Communications