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 2ms and 10ms TTI transport channels for E-DCH. The designed 10ms and 2 ms TTI transport channel structures have advantages and limitations in different areas of the radio channel conditions, scheduling control strategies, and resource management. Of added importance due only to the single configurable transport channel the E-DCH, it is important to support the switching of 2ms and 10ms TTI transport channel based on the referential radio channel conditions in order to efficiently optimize the available radio resources.