Personal Communications Services (PCS)
cordless phone that goes anywhere in the world
microcells, 50-100 meters in diameter, 0.25 watt
massive infrastructure - 40,000 cells per cellular cell
USA auction PCS 1.7-2.3 Ghz spectrum - $7.7billion
PCS in US, PCN (personal comm net) elsewhere
handoff from cell to cell as in cellular (~300ms)
requries location independent unique addresses across world, system must keep track of locations