In this paper, we propose a novel soft interference cancellation scheme considering processing delay for uplink ultra-reliable and low latency communication (URLLC). For URLLC, repetition transmission was specified to satisfy a requirement of reliability. In a conventional scheme, the performance is improved by combining bit log-likelihood ratios (LLRs) at each repetition transmission. Although it is ordinal to secure radio resources for single URLLC user equipment (UE) to avoid severe inter-UE interference (IUI), it is effective to share a radio resource among plural UEs to increase spectrum efficiency. By introducing the soft interference cancelation, the proposed scheme can efficiently suppress the negative impact of IUI while keeping the similar processing delay as the conventional scheme.
Low Latency Interference Cancellation for Uplink URLLC Repetition Transmission
2020-05-01
162456 byte
Conference paper
Electronic Resource
English