name: SNA
full_form: Shared Network Area
context: The format of the SAI used to address a HNB by the CBC for the purposes of Cell Broadcast is PLMN + LAC + SAC. The SAI required for emergency cell broadcast is currently required to be unique. Consequently, any change in the LAC used causes a change in SAI that in turn needs to be communicated to both the HNB-GW and the CBC. Population of the CBC is via the Cell Location Database (CLD) so this in turn needs to know whenever a LAC (SAI) has changed in order that it can update the CBC. Observation 1: The current specification for 3G requires that the CBC and intermediate nodes need to be stateful about the status (on/off) and SAI of every HNB (and nodeB). This is true even when an emergency warning alert is not taking place. In the case of a macrocell network, there is very little or no change in state, whilst in a HNB network there may be ongoing activity. Observation 2: The higher layer parameters (TAI, Warning Area, etc.) available in LTE provide an option for this 'statefulness' to
description: The Shared Network Area (SNA) refers to a collective set of interconnected network functions that work together to deliver specific telecommunications capabilities. In this context, SNA is related to access control and cell restriction based on SNA information.
explanation: SNA is classified as a NetworkFunction_Group because it involves a group of network functions working together to manage access control and cell restriction. The context highlights the role of DRNC (Drift RNC) and SRNC (Serving RNC) in handling SNA Information IE, which is used to restrict cell access based on SNA information.
section_title: 8.2.1.2	Successful Operation
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biotag_Description: O,B-Network,I-Network,I-Network,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,O,O,O,O,O,O,O,O,O,B-Network,O