ADAPTIVE POWER MARGIN FOR HARD HANDOFFS IN CODE DIVISION MULTIPLE ACCESS BASED SYSTEMS

摘要

A technique for regulating the transmit power level for a mobile station following a hard handoff in a code division multiple access (CDMA) based system is disclosed. In an embodiment of the invention, a profile is developed from data associated with transmit power levels from a statistical collection of a plurality of hard handoff events. A power margin is derived from the profile such that it may be varied in accordance with high or low load conditions in the system. The power margin is then applied to mobil es performing hard handoffs such that they transmit only at the appropriate pow er level required for a sufficient connection in the cell. The technique provides an automated and dynamic power margin which is scalale according to the varying loading conditions in the system. The invention reduces the amount of interference generated by transmitting at unnecessarily high power levels following hard handoffs thereby improving th e overall performance and connection quality of the system.