5Deborah E. Wireless sensor networks tutorial PART 1V :sensor network protocols. Atlanta, Georgia, USA:Westin Peachtree Plaza, 2002:23~28.
6Hasan Z, Boostanimehr H, Bhargava V. Green cellular networks: a survey, some research. IEEE Communications Surveys & Tutorials, 2011,13(4).
7Self-Optimizing Networks-the Benefits of SON in LTE. 4G Americas White Paper, July 2011.
8Bachir A, Dohler M, Watteyne T, et al. MAC essentials for wireless sensors networks. IEEE Communications Surveys & Tutorials, 2010, 12(2).
9Heinzelman W R, Chandrakasan A, Balakrishnan H. Energy- efficient protocol for wireless micmsensor networks. 33rd Hawaii International Conferrence System Scicence, Hawaii, 2000:1-10.
10Lindsey S, Raghavendra C S. PEGASIS: power-efficient gathering in sensor information systems. Proceedings of IEEE Aerospace Conference, 2002.
