Novel radio access principles useful for third generation mobile radio systems

The paper describes novel MC/TDMA/TDD radio access principles that make it possible to define minimum requirements for a whole class of services and systems, all sharing a common frequency resource in an uncoordinated multioperator environment without preallocation to different services, systems or operators. These services and systems can coexist also with different modulation types, channel bandwidths, power, speech codecs, etc. As a consequence the total market and market shares between operators and between old and new systems or services may vary without need for reallocation of the frequency assignments. It would also allow for future extension or decrease of allocated spectrum as well as introduction of new systems of the same class, without dramatic influence of already installed equipment.<<ETX>>