Institute of Electrical & Electronic Engineers
Type1 in-band relaying is supported by Long Term Evolution Advanced (LTE-Advanced). Based on the frame structure defined in 3GPP LTE, a down link radio frame is partitioned into access and backhaul sub-frames. In the access sub-frames, the direct link and access link transmissions can take place simultaneously with full frequency reuse. In the backhaul sub-frames, the DeNB (Donor evolved Node B) allocates orthogonal resources for different DeNB->RN transmission as well as co-scheduled DeNB->UE transmissions. Macro UE scheduled during the backhaul sub-frames will avoid the interference from RN in downlink, enjoying improved SINR. However, this will decrease the efficiency of radio resource reuse, and potentially reduce cell throughput.