A Novel Approach to Power Control of the Reverse Link Access Channel in 1xEV-DV System

摘要

In this paper, we propose a novel approach to fast power control of the reverse link access channel in 1xEV-DV system. It is called the advanced access channel (AACH). The closed loop power control of access attempts is started even during the transmission of the access preamble, which provides the fastest possible power control response. The power control commands for the reverse link also sever as the fast capture feedback and acknowledgement signals for the MS to continue or abort its current access probe transmission. This benefits both short and long messages by reducing message retransmission probability and allowing an early abortion of message portion transmission in the event of a failed access attempt This can also result in increased system throughput and reduced access delay. The simulation results show that the AACH with close loop power control and early abortion can achieve approximately 3 dB Eb/No improvement over the basic access channel without closed loop power control and early abortion.