Adaptive frame switching for UMTS UL-EDCH

In this paper, we evaluated and proposed an adaptive frame length switching for the enhanced uplink dedicated channel in UMTS. Different alternatives to achieve the frame switching are presented and discussed accompanied by results from simulated system throughput performance. The results show improvement by switching between 2 ms and 10 ms TTI transport channels for EDCH. A fixed 10 ms or 2 ms TTI transport channel structures have advantages and limitations in different areas of the radio channel conditions, scheduling strategies, and resource management. Different strategies looking to exploit the existence of a single configurable transport channel the E-DCH to perform adaptive switching is examined and results identifying the projected performance gains of a user geometry approach are presented