GSM/DCS air interface enhancements for high speed data applications

There has been a significant increase in demand for high speed data services over cellular networks, particularly by PCS in North America. The paper presents a proposal for enhancement of the GSM air interface to achieve the data rate expansion. The new proposal modifies the GSM air interface to allow multiple time-slot access of the TDMA frame by a single MS. Such a solution provides the platform for GSM to support a mixture of wide ranges of services with only moderate modifications of the air interface involved where the GSM modulation and basic TDMA frame structures are retained.<>