论文标题
使用多对双向计算C-RAN的端到端率提高
End-to-End Rate Enhancement in C-RAN Using Multi-Pair Two-Way Computation
论文作者
论文摘要
云无线电访问网络（C-RAN）已被提议作为一种促进技术，以跟上下一代无线网络的要求。 C-RAN上的大多数现有作品分别考虑上行链路或下行链路。但是，设计上行链路和下行链路可能会带来额外的优势，尤其是在考虑消息源用途信息的情况下。在本文中，通过考虑C-Ran中用户之间的成对消息交换来证明这个想法。提出了一个多对双向传输方案，该方案的目标是最大化端到端用户数据速率。在提议的方案中，使用了基于晶格的计算策略，其中基带处理单元（BBU）池解码是配对用户的代码字的整数线性组合，而不是解码单个代码字的线性组合。然后，BBU池压缩计算的信号并将其转发到远程无线电头（RRHS），该电台将信号解压缩并将其发送给用户。最后，每个用户都使用自己的消息作为附带信息解码其所需的消息。该方案的可实现率是通过数值得出，优化和评估的。结果表明，与现有方案相比，使用拟议方案可以实现显着的端到端率提高。
Cloud radio-access networks (C-RAN) have been proposed as an enabling technology for keeping up with the requirements of next-generation wireless networks. Most existing works on C-RAN consider the uplink or the downlink separately. However, designing the uplink and the downlink jointly may bring additional advantage, especially if message source-destination information is taken into account. In this paper, this idea is demonstrated by considering pairwise message exchange between users in a C-RAN. A multi-pair two-way transmission scheme is proposed which targets maximizing the end-to-end user data rates. In the proposed scheme, a lattice-based computation strategy is used, where the baseband processing unit (BBU) pool decodes integer linear combinations of paired users' codewords instead of decoding linear combinations of individual codewords. The BBU pool then compresses the computed signals and forwards them to the remote radio heads (RRHs), which decompress the signals and send them to the users. Finally, each user decodes its desired message using its own message as side information. The achievable rate of this scheme is derived, optimized, and evaluated numerically. Results reveal that significant end-to-end rate improvement can be achieved using the proposed scheme compared to existing schemes.
