During the past years, there has been a quickly rising interest in radio access tech-
nologies for providing mobile as well as nomadic and fixed services for voice,
video, and data. The difference in design, implementation, and use between
telecom and datacom technologies is also getting more blurred. One example is
cellular technologies from the telecom world being used for broadband data and
wireless LAN from the datacom world being used for voice over IP.
