QoS-Aware Routing for Lawful Interception Systems
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Solution Overview
Problem
Lawful Interception systems face challenges in maintaining network performance and user experience due to growing data traffic demands, leading to bandwidth limitations and quality degradation of intercepted communication content, which affects the usefulness of multimedia services for Law Enforcement Agencies.
Innovation Solution
Implementing a Quality of Service (QoS)-aware routing method that sorts communication sessions into two groups based on QoS criteria and routes them through different handover interfaces, ensuring high-quality content is delivered via a regular interface and low-quality content via a dedicated interface for enhancement and delivery to Law Enforcement Agencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all communication sessions are routed through the regular handover interface, then the system maintains simple routing structure, but QoS degradation occurs due to network congestion and bandwidth limitations
Solution Approach 1:
The patent segments the routing structure by dividing communication sessions into two distinct groups: high-QoS sessions routed through the regular handover interface and low-QoS sessions routed through an additional handover interface. This segmentation resolves the contradiction by creating specialized paths for different quality requirements, ensuring reliable delivery of critical intercepted content while maintaining overall system functionality.
2Reliability
If bandwidth capacity is increased to handle growing data traffic, then network congestion is reduced, but the cost per bit transmitted increases
Solution Approach 1:
The patent applies local quality by providing different service qualities through different routing paths. High-QoS sessions receive premium treatment with guaranteed bandwidth and low latency through the regular interface, while low-QoS sessions are routed through the additional interface with relaxed requirements. This resolves the contradiction by allocating resources locally based on actual needs, avoiding the cost of upgrading entire network infrastructure.
3Loss of information
If Law Enforcement Agencies receive all intercepted content regardless of quality, then complete information is provided, but bandwidth is wasted on useless content
Solution Approach 1:
The patent extracts and separates low-QoS sessions from the main high-QoS stream by routing them through a dedicated additional handover interface. This extraction resolves the contradiction by isolating problematic low-quality traffic that would otherwise consume valuable bandwidth on the regular interface, while still delivering complete information to LEAs through the appropriate channel.
4Ease of operation
If multimedia services are delivered without QoS consideration, then service delivery is simplified, but quality of experience for Law Enforcement Agencies deteriorates
Solution Approach 1:
The patent introduces dynamic routing that adapts to the QoS characteristics of each communication session. The system automatically classifies sessions and directs them to appropriate interfaces based on real-time quality assessment. This dynamic approach resolves the contradiction by maintaining simple operation for high-QoS services while providing enhanced quality assurance for time-sensitive multimedia content through the additional interface.
Data Source
AI summary
A method and arrangements providing QoS-aware routing of received session flows of separate communication sessions comprising Communication Content achieved and received from Lawful Interception of target sessions. The method comprises sorting each separate communication session into one of two groups, a first routing group and a second routing group, according to certain criteria wherein QoS is at least one of the criteria. Further, the method comprises routing communication sessions sorted into the first routing group via a regular handover interface and routing communication sessions sorted into the second routing group via an additional handover interface to a Law Enforcement Agency.