PDP Type in 2G/3G
PDP Type is the type of the IP address assigned to the PDP during 'PDP context activation' procedure.
The PDP Type could be IPv4, or IPv6, or IPv4v6 (Dual Stack).
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PDP Context Deactivation Procedure
The MS, the SGSN, and the GGSN can initiate The 'PDP context deactivation procedure'. PDP Context Deactivation Procedure (MS initiated) The MS sends 'Deactivate PDP context request' to the SGSN, including the TI of the PDP. There is an information element (IE) in this message, which is the 'Teardown Indication'. If this IE exist, this…
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PDP Context Modification Procedure
In case one of any parameters associated with the PDP context changed, like the QoS as example. The node in which the PDP context is changed should initiate 'PDP Context Modification' procedure. This is in order to inform other nodes about this change. The PDP context exists on the MS, the SGSN, and the GGSN.…
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NSAPI and TI – PDP identifiers
NSAPI NSAPI refers to 'Network layer Service Access Point Identifier'. The MS generates the NSAPI in the 'PDP context activation' procedure, And the MS sends it in the 'Active PDP context request' sent to the SGSN. After the 'PDP context activation' completes, a 'PDP context' will exist on the MS, the SGSN, and the GGSN. The…
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