6Research Reports International. Understand the smart grid [ R]. 2007.
7Zigbee Alliance [Z]. Zigbee Specification V1.0, USA, June27, 2006.
8IEEE, Partl 5.4 : Wireless Medium Access Control (MAC) and Physi- cJ Layer(PHY) Specifications for Low -Rate Wireless Personal Ar- ea Networks (LR- WPANs), USA: New York, October 1, 2003.