eCPRI is a packet‑based fronthaul interface developed by the CPRI Forum to transport user data, real‑time control information, and other services between eREC and eRE units. Designed to support 5G, eCPRI offers greater flexibility than traditional CPRI by allowing different functional split options within the physical layer. This improves transport efficiency, reduces bandwidth requirements, and enables scalable, cost‑effective fronthaul networks. By shifting to an Ethernet‑based architecture, eCPRI supports the performance, capacity, and deployment demands of modern 5G mobile networks.

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