Ericsson's mobile location solution

摘要

We live in a changing world. Landscapes and skylines shift as cities expand and new buildings are erected. People are also changing: over time we tend to dress differently, modify our habits, find new interests, and refine our views on music, politics, and so on. On the face of it, every- thing is in a state of change. Moreover, the pace at which change occurs seems to be picking up. Under the surface, however, many fundamental constants remain, oblivious to external change-the changing world of fashion preys on human vanity (a constant); and the recent shift from wired to wireless or mobile communication is indicative of mankind's as yet unfulfilled need to communicate (another constant).