name: LMISF
full_form: LI Mirror IMS State Function
context: The following summarizes the key steps of this approach: 1. The S-GW/BBIFF provides LMISF with bearers carrying IMS signalling over Xia reference point for all inbound roamers where S8HR is deployed. NOTE: S-GW/BBIFF also notifies the LMISF whenever an IMS Signalling Bearer for S8HR APN is created, modified or deleted. This will allow the LMISF to know the IMSI value associated with the inbound roamer's UE 2. The LMISF maintains any changes in IMEI to private user identity or public user identity associations signalled in the retrieved IMS signalling bearers. 3. LMISF receives over X1_1 interface the request to activate interception based on an IMEI. 4. LMISF retrieves the IMEI from the associations established in step 1. 5. If there are no associations matching the targeted IMEI, the LMISF will arm a trigger on IMEI association changes that match the targeted IMEI. 6. If and when an association matching the IMEI is found or triggered, then LI on the associated identity (e.g. public
description: The LI Mirror IMS State Function (LMISF) is a network function responsible for maintaining associations between International Mobile Equipment Identity (IMEI) and private or public user identities, as well as detecting and triggering lawful intercept requests based on IMEI. It interacts with other network functions such as the Serving and Packet Data Network Gateway (S-GW)/Bringing-Your-Own-Device Interworking Function (BBIFF) and receives IMS signalling bearers over the Xia reference point.
explanation: LMISF is classified as a Network Function because it performs specific tasks related to user identity management, lawful intercept, and interaction with other network functions within the telecommunications infrastructure.
section_title: 6.1.5.1.2	Option 1: Detection of Target IMEI communication in LMISF
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biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,B-Parameter,I-Parameter,I-Parameter,I-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,I-Network Function,I-Network Function,I-Network Function,I-Network Function,I-Network Function,O,B-Network Function,I-Network Function,O,O,O,B-Network,O,O,O,O,O,O,O