Lawful Intercept Provisioning Using CC-PAG Aggregator Selection
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Solution Overview
Problem
Existing lawful intercept systems overutilize network resources due to the maintenance of network connections between each point of interception (POI) and mediation and delivery functions (MDF), leading to inefficiencies in data forwarding.
Innovation Solution
A Lawful Interception Provisioning Function (LIPF) introduces and updates relationships between Content of Communication-POIs (CC-POIs) and CC-POI aggregators (CC-PAGs), optimizing the selection and provisioning of CC-PAGs based on criteria such as service type and data network, thereby reducing the load on network resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network connections are maintained between each POI and MDF, then lawful intercept functionality is ensured, but network resources are overutilized
Solution Approach 1:
The patent introduces CC-PAG (Content of Communication-POI Aggregator) as an intermediary component between CC-POIs and MDF. The CC-PAG aggregates data from multiple CC-POIs and forwards consolidated data to the MDF, reducing the number of direct connections needed while maintaining lawful intercept functionality. This mediator approach allows multiple POIs to share a common path to the MDF, optimizing network resource utilization.
2Reliability
If direct connections are maintained between each POI and MDF, then data delivery reliability is ensured, but latency increases during high-speed traffic interception
Solution Approach 1:
The patent merges data streams from multiple CC-POIs at the CC-PAG aggregator before forwarding to the MDF. By consolidating data paths and processing aggregated data in fewer steps, the system reduces the time required for data interception and delivery during high-speed traffic scenarios while maintaining reliable data delivery through the structured aggregation process.
3Reliability
If network connections are maintained for all POI-MDF pairs, then complete intercept coverage is achieved, but packet drop rates increase
Solution Approach 1:
The CC-PAG acts as a mediator that consolidates data from multiple POIs, reducing the total number of data forwarding operations required. By aggregating data at the CC-PAG layer, the system maintains complete intercept coverage across all POIs while reducing packet drop rates through more efficient, consolidated data forwarding paths to the MDF.
Data Source
AI summary
A method, a device, and a non-transitory storage medium are described in which lawful intercept service is provided. The lawful intercept service may include transmitting information regarding one or more user plane functions (UPFs) or content of communication (CC) point of intercept (POI) aggregators (CC-PAGs) that have been updated or instantiated on a telecommunications network to an administrative function of a lawful intercept system in the telecommunications network; and automatically provisioning, in response to the informing, each UPF associated with the administrative function regarding identities of available CC-PAGs and selection criteria for determining when to forward intercepted CC to particular ones of the available CC-PAGs.