1. Centre for Energy-Efficient
Telecommunications, Department of Electrical and Electronic Engineering, The University of Melbourne, 3010, Victoria, Australia
2. Department of Finance, The University of Melbourne, 3010, Victoria, Australia
3. Department of Computing and Information
Systems, The University of Melbourne, 3010,
Victoria, Australia
4. Bell Laboratories, Alcatel-Lucent, Holmdel, New Jersey,
07733, United States