METHODS, APPARATUS AND COMPUTER PROGRAMS FOR HALF-DUPLEX FREQUENCY DIVISION DUPLEXING

摘要

A wireless device is operated such that transmission and reception by the wireless device uses half-duplex frequency division duplexing. The wireless device transmits in an uplink subframe at a first frequency and receives in a downlink subframe at a second frequency. The uplink subframe and downlink subframe occur at different times. The frame structure that is used has a special subframe (80) to allow at least switching from downlink reception to uplink transmission. In one example, the special subframe (80) consists only of a downlink pilot time slot (85), to allow downlink pilot signals to be received at the wireless device, and a guard period (90), during which no data is received at or transmitted by the wireless device. In another example, the special sub frame (80) comprises a downlink pilot time slot (85) and a guard period (90), the special subframe (80) having no uplink pilot time slot for uplink pilot signals.

主权项

1. A method of operating a wireless device, the method comprising:
operating the wireless device such that transmission and reception by the wireless device uses a frame structure; the transmission and reception by the wireless device using half-duplex frequency division duplexing such that the wireless device transmits in an uplink subframe of the frame structure at a first frequency and receives in a downlink subframe of the frame structure at a second frequency, the uplink subframe and downlink subframe occurring at different times; the frame structure having a special subframe to allow at least switching from downlink reception to uplink transmission; the special subframe consisting only of a downlink pilot time slot, to allow downlink pilot signals to be received at the wireless device, and a guard period, during which no data is received at or transmitted by the wireless device.