name: IOI
full_form: Inter Operator Identification
context: between operators involved in IMS sessions. - IOI identities shall be included within SIP signalling: - When a SIP request is passed out of a network the IOI identity of that network shall be included in the SIP signalling. - When a SIP response is returned the IOI identity of that responding network shall be included in the SIP signalling. - Each network is responsible for including its own unique IOI Identity into the SIP signalling. The IOI Identity shall be unique for each operator (for example the IOI Identity of Home Operator A is different from Home Operator B). Within the operator network, the IOI identity is stored at the S-CSCF. - IOI Identities received in the SIP signalling shall be incorporated into the Accounting requests generated by the IMS network elements. The IOI received from the remote network within SIP signalling applies for the duration of the event with which it is associated. For example, an IOI assigned for session establishment is valid until session
description: Inter Operator Identification (IOI) is a unique identifier used to distinguish between operators involved in IMS sessions, enabling accurate charging and accounting. It is included in SIP signalling and stored at the S-CSCF within an operator's network.
explanation: The context explicitly states that IOI identities are included in SIP signalling and are used for identification of operators for charging purposes, indicating its role as a critical parameter in telecommunications operations.
section_title: 7.1.3.2Identification of Operators for Charging
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biotag_Description: B-Parameter,I-Parameter,I-Parameter,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-Protocol,O,O,O,O,O,B-Network Function,O,O,O,O