Smart Phone and Next Generation Mobile Computing

276 Smart Phone and Next-Generation Mobile Computing

proximity (for example, on a PDA with both air interfaces), interfer-

ence will occur and the performance of both will drop significantly.

To address this issue, IEEE 802.15.2 and Bluetooth SIG working

groups have been formed. The IEEE 802.15.2-2003 standard was com-

pleted in August 2003. The basic approaches can be divided into

two categories: collaborative and noncollaborative. The collabora-

tive approach aims to coordinate frequency use between two types

of radios, thus requiring interprotocol communication that must be

implemented on the same device. The noncollaborative approach

looks at only one side; that is, it tries to mitigate interference by

reducing the chances of frequency overlapping, ...