METHOD AND ARRANGEMENT IN A TELECOMMUNICATION SYSTEM

摘要

IP No. A method in a relay node in a wireless communication system and the relay node itself are disclosed. The relay node (1006) is adapted to avoiding or reducing interference between transmissions from a donor evolved Node B (1004) to the relay node and downlink transmissions from the relay node to at least one mobile terminal (1008) connected to the relay node. The relay node comprises an interference avoiding unit adapted to create at least one interruption in the downlink transmissions from the relay node to the at least one mobile terminal and a receiving unit adapted to receive transmissions from the donor evolved Node B during the at least one interruption. The transmissions (1010, 1012) take place in overlapping frequency bands, and the at least one interruption is created by using a Multicast/Broadcast Single Frequency Network-subframe format. A donor evolved Node B (1004) connected to the above described relay node (1006) in a wireless communication system is disclosed. The donor evolved Node B is adapted to avoid or reduce interference between transmissions from the donor evolved Node B to the relay node and downlink transmissions from the relay node to at least one mobile terminal connected to the relay node, The donor evolved Node B comprises a time-shifting unit adapted to shift subframes destined for the relay node one or more OFDM symbol durations in time relative to the relay node downlink subframes and transmitting unit adapted to transmit the time shifted subframes or other subframes to the relay node. The transmissions take place in overlapping frequency bands, and wherein the at least one interruption is created by the relay node using a Multicast/Broadcast Single Frequency Network-subframe format. An arrangement adapted to avoid or reduce interference in a wireless communication system comprising the above described evolved Node B (1004) controlling a donor cell (1002), and the above described relay node (1006) is also disclosed.