2024/08/26 by Nadim Ghaddar, Lele Wang, Ghaddar, Nadim +1
Computer Science · Engineering · #Advanced Wireless Network Optimization #Cooperative Communication and Network Coding #Error Correcting Code Techniques #FOS: Computer and information sciences #Information Theory (cs.IT)
paper · pdf · doi:10.48550/arxiv.2408.14565
openalex publication_date 2024/08/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
The problem of coding for the uplink and downlink of cloud radio access networks (C-RAN's) with K users and L relays is considered. It is shown that low-complexity coding schemes that achieve any point in the rate-fronthaul region of joint coding and compression can be constructed starting from at most 4(K+L)-2 point-to-point codes designed for symmetric channels. This reduces the seemingly hard task of constructing good codes for C-RAN's to the much better understood task of finding good codes for single-user channels. To show this result, an equivalence between the achievable rate-fronthaul regions of joint coding and successive coding is established. Then, rate-splitting and quantization-splitting techniques are used to show that the task of achieving a rate-fronthaul point in the joint coding region can be simplified to that of achieving a corner point in a higher-dimensional C-RAN problem. As a by-product, some interesting properties of the rate-fronthaul region of joint decoding for uplink C-RAN's are also derived.