1Y.--G. Tseng,S. --L. Wu,W. --H. Liao, and C. --M. Chao,"Location awareness in ad hoc wireless mobile networks ", IEEE Computer, Vol. 34,pp. 46--52. June2001.
2J. Hightower and G. Borriello,"Location systems for ubiquitous computiong", IEEE Computer, vol. 38, pp. 57--66,Aug. 2001.
