name: SSN
full_form: Sub-System Number
context: of the UE Registration Query procedure. Initiation The RNC sends SCCP CONNECTION REQUEST message to the Core Network. A RANAP message shall be included in the user data field of the SCCP CONNECTION REQUEST message when the RANAP message size is less than or equal to the maximum size of the user data field in the SCCP CONNECTION REQUEST message. When the RANAP message is longer than the maximum size, the user data field shall not be included in the SCCP CONNECTION REQUEST message. If the Core Network receives an SCCP CONNECTION REQUEST message for a UE for which an SCCP connection already exists, or if the Core Network receives an SCCP CONNECTION REQUEST message that does not include a user data field, and later finds out that the SCCP CONNECTION REQUEST message was for a UE for which an SCCP connection already exists, the Core Network shall ensure that the new SCCP connection and the already existing SCCP connection are for the same UE, e.g. by security functions, and if so, release
description: The Sub-System Number (SSN) is an identifier used in SCCP addressing schemes. It is defined in TS 23.003 and utilized when GT addressing is employed, alongside SPC and GT.
explanation: The text describes SSN as a component of the SCCP addressing scheme, specifically mentioning its use within signaling protocols for network identification.
section_title: 4.5.1.2	SCCP Addressing
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biotag_Description: O,B-Parameter,I-Parameter,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,B-Specification,O,O,O,O,B-Parameter,O,O,O,O,B-Parameter,O,O