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eAxC_ID Composer / Decomposer is an interactive tool for working with O-RAN fronthaul eAxC_IDs, where the 16-bit identifier is split into DU_Port_ID, BS_ID, CC_ID, and RU_Port_ID fields. Instead of hardcoding a fixed bit layout, the tool lets you define each field's bitmask yourself, so it adapts to any O-RAN eAxC_ID convention — including non-contiguous bit assignments — and flags overlaps or uncovered bits in real time on a live bit-grid. It supports two workflows: Construc

1. Introduction & Structural Background The transition from traditional monolithic Base Stations to disaggregated Open Radio Access Networks (O-RAN) has fundamentally reshaped the telecommunications industry. In a classic Distributed RAN (D-RAN), the baseband processing and RF frontends are tightly integrated using proprietary point-to-point protocols like the Common Public Radio Interface (CPRI). CPRI transmits continuous time-domain, uncompressed In-phase and Quadrature (IQ