Patent ID: 6553078
Filing Date: 2003-04-22
Classification: H04B

Abstract:
An antenna switching diversity method in a TDMA-FDD radio communication system including a base station and a radio terminal, said system separating transmission and reception in both time and frequency in each of said base station and said radio terminal, said method includingmeasuring reception quality uplink for a TDMA-FDD radio channel on a set of several antennas belonging to said base station; storing a first indicator of a best antenna from said set in said base station; measuring reception quality downlink for said TDMA-FDD radio channel on an antenna belonging to said radio terminal; storing a second indicator of said reception quality downlink in said radio terminal; selecting, based on the value of said first indicator, an antenna from said set for reception uplink; reporting said second indicator to said base station; storing said reported second indicator in said base station; and selecting, independently from the selection of antenna for reception uplink and based on the value of said second indicator, an antenna from said set for transmission downlink.