name: GSN
full_form: GPRS Support Node (either SGSN or GGSN)
context: The GSN might lose its connection to its primary CGF due to a link failure or CGF going down. In this kind of redundancy condition the GSN attempts to redirect the CDR traffic to a secondary CGF (after possible retries have failed). The GSN maintains an internal buffer for Sequence Numbers of requests not yet successfully responded to by the primary CGF, for the case that it may become capable of communicating to the primary CGF at a later date. The GSN will send the not responded Data Record Packets (DRPs) to the secondary CGF, and the GSN maintains also a buffer for the Sequence Numbers related to those DRPs that have been temporarily stored to this secondary CGF. (If the communication towards the secondary CGF would not work, the transfer of possibly duplicated DRPs and Sequence Number bookkeeping would be done for a tertiary CGF etc.) Also the CGFs maintain Sequence Number buffers for each of their GSN links. The Sequence Numbers may in future be needed in relation to the possibly
description: A GPRS Support Node (GSN) is a network function that supports General Packet Radio Service (GPRS) within a cellular network, responsible for routing data packets between the base station subsystem and the external packet data networks. It can be either a Serving GSN (SGSN) or a Gateway GSN (GGSN), each serving different purposes in the GPRS network.
explanation: The context describes the GSN's role in handling data routing and management within the cellular network, specifically for GPRS traffic. This function of managing and directing data flow between network components classifies it as a Network Function.
section_title: 7.3.4.5.1General logic
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biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,B-Technology,I-Technology,I-Technology,I-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,B-Network Function,B-Network Function,O,O,O,O,O,O,O,B-Technology,O