Park Seok-Hwan, Simeone Osvaldo, Shamai Shitz Shlomo
Division of Electronic Engineering, Chonbuk National University, Jeonju 54896, Korea.
Department of Informatics, King's College London, London WC2R2NA, UK.
Entropy (Basel). 2019 Apr 24;21(4):433. doi: 10.3390/e21040433.
In modern implementations of Cloud Radio Access Network (C-RAN), the fronthaul transport network will often be packet-based and it will have a multi-hop architecture built with general-purpose switches using network function virtualization (NFV) and software-defined networking (SDN). This paper studies the joint design of uplink radio and fronthaul transmission strategies for a C-RAN with a packet-based fronthaul network. To make an efficient use of multiple routes that carry fronthaul packets from remote radio heads (RRHs) to cloud, as an alternative to more conventional packet-based multi-route reception or coding, a multiple description coding (MDC) strategy is introduced that operates directly at the level of baseband signals. MDC ensures an improved quality of the signal received at the cloud in conditions of low network congestion, i.e., when more fronthaul packets are received within a tolerated deadline. The advantages of the proposed MDC approach as compared to the traditional path diversity scheme are validated via extensive numerical results.
在云无线接入网络（C-RAN）的现代实现中，前传传输网络通常基于分组，并且具有使用网络功能虚拟化（NFV）和软件定义网络（SDN）的通用交换机构建的多跳架构。本文研究了具有基于分组的前传网络的C-RAN的上行链路无线和前传传输策略的联合设计。为了有效利用从远程无线头端（RRH）向云端传输前传分组的多条路由，作为更传统的基于分组的多路由接收或编码的替代方案，引入了一种直接在基带信号级别运行的多描述编码（MDC）策略。MDC确保在低网络拥塞情况下，即在容忍的期限内接收到更多前传分组时，云端接收到的信号质量得到改善。通过大量数值结果验证了所提出的MDC方法与传统路径分集方案相比的优势。
