name: GGSN
full_form: Gateway GPRS Support Node
context: This component, considered on a point-to-point link, is due to the ATM SAR sub-layer action and to the multiplexing of cells and sub-cells (for AAL2) on the ATM link performed in the CPS (Common Part Sub-layer). The PTD and PDV are especially impacted by the packet queuing delay in the CPS transmitter buffer. This queuing delay depends on many traffic assumptions and network configuration: The individual sourceâs bit-rate (direct dependence); The negotiated QoS of the ATM connection (especially an increase of the Peak Cell Rate (PCR) decreases the component); The number of active multiplexed AAL2 connections due to an increase of ATM connection load;. Considering a low ATM connection load, the CU_Timer_ value affects the PTD and the PDV in the extent that probability of CU_Timer_ expiration is no null, while for higher loads the CU Timer has no predictable effect on delay performance Defined in [9], CU_Timer_ is optionally used to ensure that a CPS packet does not wait for a too long
description: The Gateway GPRS Support Node (GGSN) is a network element that serves as an interface between the Gi/SGi interface and the public internet or private networks. It manages PDP contexts, routes packets to and from the UE, and interacts with other network functions like the SGSN and BM-SC. In MBMS, it handles multicast traffic and requests authorization from the BM-SC for terminals to receive MBMS services.
explanation: The GGSN is classified as a Network Function because it manages PDP contexts, routes packets, and interacts with other network functions. Its specific responsibilities in handling multicast traffic and requesting authorization from the BM-SC further solidify its classification.
section_title: 6.1.2.2.1.1	Integrated RAN based on Rel.6 MBMS framework
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biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,B-Interface,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,B-Service,O