name: GSM
full_form: Global System for Mobile communications
context: One or more Closed Subscriber Group (CSG) cells are identified by a unique numeric identifier called CSG Identity or CSG ID. A UE belonging to a CSG has the corresponding CSG ID and associated PLMN ID in its CSG whitelist. The CSG whitelist is maintained and provided by NAS. The CSG ID is broadcast in system rmation by the CSG cell or hybrid cell, and used by the UE for cell (re)selection and handover purposes. A cell may optionally broadcast the CSG Indicator, whose presence and value of TRUE indicates the cell is a CSG cell. The absence of the CSG indicator in a cell which broadcasts a CSG identity indicates that it is a hybrid cell. A CSG cell or hybrid cell may broadcast the HNB Name, a textual identifier, in system rmation. The HNB Name can be used to aid the human user in manual selection of a CSG ID. At the physical layer, a CSG cell is identified by its carrier frequency (UARFCN) and Primary Scrambling Code (PSC). A set of PSCs could be reserved for CSG deployment and this
description: The Global System for Mobile communications (GSM) is a standard for mobile telecommunications. It is compared to UMTS (Universal Mobile Telecommunications System) macrocells and microcells in the context of system outage degradation due to interference between GSM and UMTS systems in urban environments.
explanation: GSM is classified as Technology because it refers to a specific standard for mobile telecommunications, similar to how UMTS is also a technology standard. The text focuses on comparing GSM's performance with another technology (UMTS) and analyzing their interaction.
section_title: 4.2.5.3.2	GSM microcell UL System Outage Degradation (%) due to interference from UMTS macrocell UL
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