My 33.128 Notes

4.2 Basic principles for internal interfaces

This grid lists internal interfaces associated to identity mapping and indicates the protocol used to realize each interface, and gives a reference to the relevant clauses of the 3GPP TS 33.128 V18.0.0 (2022-06) document that specify how the protocol is to be used for the given interface.

Internal interfaces and related protocols

Interface	Description	Protocol used to realize interface	Usage
LI_ADMF	Used to pass intercept provisioning information form the LICF to the LIPF.	Out of scope of the V18.0.0 document.
LI_IQF	Used to pass information related to IEFs and ICF to IQF.	Out of scope of the V18.0.0 document.
LI_XEM1	Used by the LICF/LIPF to manage IEFs and ICF.	ETSI TS 103 221-1	See clause 5.2.7
LI_XER	Used to pass identifier association event records from IEFs to ICF.	See Clause 5.9	See Clause 5.9
LI_XQR	Used to pass queries from IQF to ICF and responses from ICF to IQF.	ETSI TS 103 221-1	See Clause 5.8

4.3 Basic principles for external handover interfaces

This grid lists the external handover interfaces (HI) associated to identity mapping shown in clause 4.1, indicates the protocol used to realize each interface, and gives a reference to the relevant clauses of the present document that specify how the protocol is to be used for the given interface.

External handover interfaces and related protocols

Interface	Description	Protocol used to realize interface	Usage
LI_HI1	Used to send warrant and other interception request information from LEA to operator.	ETSI TS 103 120 shall be supported. Other methods (e.g. manual exchange) may be used depending on national regulatory requirements.	See clause 5.4
LI_HIQR	Used to send warrant and other identifier association query information from LEA to CSP and used by the CSP to send query responses to the LEA.	ETSI TS 103 120 shall be supported.	See clause 5.7

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