We outline the trade-offs that arise by the flexibility of wireless nodes to transmit at different power levels and define a framework for formulating the problem of session routing from the perspective of energy expenditure. We propose a set of metrics that associate each link transmission with a cost and consider both the cases of plentiful and limited bandwidth resources, the latter jointly with a set of channel allocation algorithms. Performance is captured by call blocking probability and average consumed energy. A detailed simulation model has been developed and used to evaluate the algorithms for a variety of networks. State aggregation is used to solve the problem and accelerate computation by looking for a sub-optimal policy.
Preliminary results show that the new method increases the speed of convergence impressively.
Aggregation introduces errors inevitably. An adaptive aggregation scheme employing the new computation method is also proposed to reduce the aggregation errors. To view and print PDF files, you must have Adobe Acrobat Reader installed on your computer. If you do not have Acrobat Reader, you can download it by visiting the Adobe web site.