Gateway Device Profiling for Per-Device Packet Flow Analysis
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Solution Overview
Problem
Network service providers face challenges in performing fine-grained analysis of packet flows due to limited visibility into end-user devices behind gateways, preventing effective security and bandwidth management.
Innovation Solution
A gateway creates device profiles for connected devices, appending profile information to packet flows, enabling servers and routers to receive and analyze this information for enhanced policy enforcement and management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the service provider monitors packet flows between hub and gateways, then network utilization and bandwidth management are improved, but fine-grained analysis of individual user devices is lost due to gateway aggregation
Solution Approach 1:
The gateway acts as an intermediary that extracts device identification information from packets and appends it to packet flow data before forwarding to the service provider network. This mediator approach enables the service provider to obtain fine-grained device information without requiring direct access to the customer premises network, resolving the contradiction between maintaining network privacy and enabling detailed analysis.
Solution Approach 2:
The patent segments the network monitoring function into two parts: the gateway handles local device identification and packet flow extraction, while the service provider network performs centralized analysis. This segmentation allows fine-grained device-level analysis to be achieved while keeping the gateway's role simple and the service provider's analysis capabilities centralized.
2Measurement precision
If the gateway appends device profile information to each packet, then device identification capability is improved, but network traffic overhead increases
Solution Approach 1:
The gateway appends device profile information to only certain packets (e.g., first packet of each flow or packets at specific intervals) rather than every packet. This partial action approach provides sufficient device identification capability for analysis purposes while significantly reducing the overall traffic overhead compared to appending information to all packets.
3Reliability
If the service provider implements per-device policy enforcement, then security and bandwidth management are improved, but system complexity increases due to tracking multiple devices behind each gateway
Solution Approach 1:
The gateway automatically performs device identification and profile extraction without requiring manual configuration or complex service provider intervention. The gateway's built-in capabilities to identify devices and append their profiles enable the service provider to implement per-device policies using simple, standardized processing at the network side, reducing overall system complexity while maintaining high reliability.
Data Source
AI summary
Methods and apparatus are disclosed that enable information about devices connected behind a gateway, such as a home gateway, to be made available to and used by other entities, such as servers and routers, on a communications network.