On Energy-Efficient Hierarchical Cross-Layer Design: Joint Power Control and Routing for Ad Hoc Networks
1 Department of Electrical and Computer Engineering, Charles V. Schaefer Jr., School of Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
2 Department of Electrical Engineering, School of Engineering and Applied Science, Princeton University, Princeton, NJ 08544, USA
EURASIP Journal on Wireless Communications and Networking 2007, 2007:060707 doi:10.1155/2007/60707Published: 14 March 2007
A hierarchical cross-layer design approach is proposed to increase energy efficiency in ad hoc networks through joint adaptation of nodes' transmitting powers and route selection. The design maintains the advantages of the classic OSI model, while accounting for the cross-coupling between layers, through information sharing. The proposed joint power control and routing algorithm is shown to increase significantly the overall energy efficiency of the network, at the expense of a moderate increase in complexity. Performance enhancement of the joint design using multiuser detection is also investigated, and it is shown that the use of multiuser detection can increase the capacity of the ad hoc network significantly for a given level of energy consumption.