Mediation Device Infrastructure for Cross-Domain Mobile Node Surveillance
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Solution Overview
Problem
Current lawful intercept systems for mobile nodes are limited in their ability to dynamically monitor communications as the node moves between different service provider networks, leading to gaps in surveillance capabilities.
Innovation Solution
A tiered framework and architecture that allows service providers to dynamically apply taps on mobile nodes across different domains, using mediation devices and a backbone router arrangement to ensure continuous monitoring, even when the node moves between service provider networks, by establishing and terminating data channels and communication sessions as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mediation device monitors communications within its own domain, then surveillance reliability is improved, but surveillance capability deteriorates when the mobile node moves to another service provider network
Solution Approach 1:
The patent introduces a backbone router arrangement as an intermediary that connects multiple service provider networks. This backbone router receives tapped communications from mediation devices across different networks and forwards them to the requesting mediation device, enabling continuous surveillance regardless of which network the mobile node is currently in.
Solution Approach 2:
The mediation device is enhanced with dual functionality: it continues to perform its traditional role of tapping communications within its own service provider network, and additionally acts as a client to other mediation devices via the backbone router to receive and forward communications from mobile nodes that have moved to other networks.
2Device complexity
If communications are tapped within a single service provider network, then system complexity is reduced, but continuous monitoring is lost when the node moves between networks
Solution Approach 1:
The surveillance system is segmented into multiple independent components: individual mediation devices for each service provider network, and a backbone router arrangement that connects them. Each mediation device operates independently within its own network domain, while the backbone router coordinates between them to maintain continuous surveillance across network boundaries.
3Adaptability or versatility
If the mediation device establishes communication channels with multiple mediation devices, then surveillance coverage is improved, but communication overhead increases
Solution Approach 1:
The backbone router serves as a communication intermediary that mediates all interactions between mediation devices of different service provider networks. Instead of requiring direct communication channels between every pair of mediation devices, all communications are routed through the backbone router, significantly reducing the total number of communication channels needed.
Data Source
AI summary
Methods and apparatus for providing a mediation device infrastructure that allows a mobile node to be tapped while roaming among and within service providers are disclosed. In one embodiment, a method includes determining when a node that is tapped by a first mediation device has moved from a first domain associated with the first mediation device into a second domain associated with a second mediation device. A first packet is sent to the second mediation device if the node has moved. The first packet provides an indication that the second mediation device is to tap the node. The method also includes opening a call data channel to the second mediation device, and receiving information from the second mediation device on the call data channel that is obtained by the second mediation device from the node. Finally, the method includes providing the information to the first mediation device.