论文标题
网络切片用于EMBB，URLLC和MMTC：上行链接速率分类多个访问方法
Network Slicing for eMBB, URLLC, and mMTC: An Uplink Rate-Splitting Multiple Access Approach
论文作者
论文摘要
5G中有三个通用服务：增强的移动宽带（EMBB），超级可靠的低延迟通信（URLLC）和庞大的机器型通信（MMTC）。为了确保异质服务的性能，建议将网络切片分配给不同的服务。网络切片通常以正交多访问（OMA）方式完成，这意味着不同的服务是分配的非交流资源。但是，随着用户数量的增长，基于OMA的切片并不总是最佳的，并且非正交方案可能会取得更好的性能。这项工作旨在分析上行链路中不同切片方案的性能，并研究了基于速率降低多重访问（RSMA）的有希望的方案。 RSMA可以提供更灵活的解码顺序，并且在理论上，与OMA和非正交的多重访问（NOMA）相比，无需分时的速率可实现的速率区域最大。因此，RSMA有可能提高需要不同服务的用户率。此外，不必先连续地解码一个用户的两个拆分流，因此RSMA允许合适的用户根据服务要求而拆分消息并设计适当的解码顺序。这项工作表明，对于网络切片，RSMA可以胜过Noma的表现，并且在某些地区获得了OMA的巨大收益。
There are three generic services in 5G: enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine-type communications (mMTC). To guarantee the performance of heterogeneous services, network slicing is proposed to allocate resources to different services. Network slicing is typically done in an orthogonal multiple access (OMA) fashion, which means different services are allocated non-interfering resources. However, as the number of users grows, OMA-based slicing is not always optimal, and a non-orthogonal scheme may achieve a better performance. This work aims to analyse the performances of different slicing schemes in uplink, and a promising scheme based on rate-splitting multiple access (RSMA) is studied. RSMA can provide a more flexible decoding order and theoretically has the largest achievable rate region than OMA and non-orthogonal multiple access (NOMA) without time-sharing. Hence, RSMA has the potential to increase the rate of users requiring different services. In addition, it is not necessary to decode the two split streams of one user successively, so RSMA lets suitable users split messages and designs an appropriate decoding order depending on the service requirements. This work shows that for network slicing RSMA can outperform NOMA counterpart, and obtain significant gains over OMA in some region.
