Frequency division duplex and half duplex frequency division duplex in multi-hop relay networks

摘要

In a method of operating a relay station in a multihop wireless relay network, the relay station in communication with a superordinate station and a subordinate station a downlink transmission from the superordinate station is received at a first carrier frequency; an uplink transmission from the subordinate station is received at a second carrier frequency; a downlink transmission to the subordinate station is transmitted at the first carrier frequency; and an uplink transmission to the superordinate station is transmitted at the second carrier frequency. The communication between the relay station and the superordinate station may be scheduled using frames, where each frame comprises a downlink portion at the first carrier frequency, the downlink portion comprising a first downlink subframe for communication between the superordinate station and a first plurality of stations, and a second downlink subframe for communication between the superordinate station and a second plurality of stations, and an uplink portion at the second carrier frequency, the uplink portion comprising a first uplink subframe for communication between the superordinate station and the first plurality of stations, and a second uplink subframe for communication between the superordinate station and the second plurality of stations. The first downlink subframe may correspond with a first time interval, and the first uplink subframe may correspond with a second time interval, where the first time interval and the second time interval do not overlap.