Patent ID: 6226274
Filing Date: 2001-05-01
Classification: H04B,H04J

Abstract:
A system for FDD communication, comprising:a base station, said base station generating a time frame comprising a plurality of time slots, each time slot comprising a first time segment and a second time segment;a plurality of user stations, wherein said user stations transmit to said base station over a first frequency band only in the first time segment of said time slots, and said base station transmits to said user stations over a second frequency band only in the second time segment of said time slots, said first frequency band distinct from said second frequency band; anda plurality of duplex channels each duplex channel defined by one of said first time segments with respect to said second frequency band and one of said second time segments with respect to said first frequency band, wherein, for each duplex channel, the time slot containing the first time segment of the duplex channel is separated by about one half of said time frame from the time slot containing the second time segment of the duplex channel.