name: RDN
full_form: Radio Distribution Network
context: The high level objective of this study item is to define a 3GPP methodology for measuring the radiated performance of multiple antenna reception and MIMO receivers in the UE. The test methodology should be relevant for HSPA and LTE technologies, with particular focus on handheld devices and devices embedded in laptop computers. The steps intended to achieve this involve the following: 1) Identify the performance metrics and clarify the requirements of operators for defining such a methodology. 2) Review of potential solutions also considering input from CTIA ERP and COST 2100. 3) Agree the final solution, and detail the agreed 3GPP solution in a technical report to be reported to RAN plenary. 4) Maintain ongoing communication with COST 2100 and CTIA ERP to ensure industry coordination on this topic. TSG RAN should contact TSG GERAN to get feedback on the applicability of such a test methodology for GERAN.
description: The Radio Distribution Network (RDN) is a component within the Active Antenna System (AAS) Base Station (BS) architecture. It distributes RF TX outputs to the antenna array and collects RX inputs from the antenna paths. The RDN acts as an intermediary between the Transceiver Unit (TXU/RXU) and the Antenna Array (AA), enabling signal distribution in both transmission and reception directions.
explanation: The RDN is classified as a Network Function because it manages signal distribution within the AAS BS, connecting transceiver units to the antenna array and facilitating communication between these components. Its role in distributing TX outputs and collecting RX inputs aligns with the characteristics of a network function.
section_title: 4.3	General AAS BS RF architecture
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