Smart Phone and Next Generation Mobile Computing

The Next Wave of Computing 51

unlicensed spectrum. Bluetooth, some types of wireless LANs, and

most microwave ovens use the same unlicensed 2.4-GHz spec-

trum band. Although the underlying radio frequency schemes

are different, interference may occur in some cases. For exam-

ple, it has been reported that a Bluetooth-enabled cell phone may

turn on an electronic shaver. On the other hand, wireless LANs

are considerably faster than cellular access, thus Internet access

from a cell phone or smart phone could go through a wireless

LAN hotspot if available, rather than always connecting to cel-

lular networks. In the long run, with mobile access becoming

more ubiquitous, a systematic approach to heterogeneous wireless

networks is needed.

2.5 Smart Phone Applications ...