GTP Packet Detection System for Abnormal Intrusion Prevention
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Solution Overview
Problem
The existing GPRS tunneling protocol (GTP) lacks mechanisms for user authentication and fraud detection, leading to potential abnormal packet intrusions such as GTP-in-GTP or GTP-over-GTP, which can cause abnormal data call setups, forced terminations, and billing attacks in mobile communication networks.
Innovation Solution
A system and method that includes a system management unit, packet capture unit, and packet detection unit to monitor and analyze GTP packets, determining whether to drop abnormal packets based on operation modes, specifically using a packet parsing unit and packet analysis unit to assess GTP-U packet length and payload for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If GTP protocol is used for data transmission without authentication mechanisms, then data service can be provided to user equipment, but the network becomes vulnerable to abnormal packet intrusions such as GTP-in-GTP attacks
Solution Approach 1:
The patent implements preliminary authentication and validation mechanisms that check GTP packets before they are processed in the network. The system validates packet structure, verifies authentication information, and checks for abnormal patterns before allowing data transmission, thereby preventing security threats while maintaining service functionality
Solution Approach 2:
The patent introduces an intermediary security verification system between the GTP packet source and the network core. This intermediary component performs authentication, validates packet structure, and filters abnormal packets, acting as a mediator that enables secure data transmission without compromising network reliability
2Reliability
If packet detection and analysis mechanisms are implemented to detect abnormal GTP packets, then network security is improved, but system complexity increases
Solution Approach 1:
The patent divides the packet detection system into distinct functional modules: a packet capture unit for receiving GTP packets, a packet parsing unit for extracting packet information, and a packet analysis unit for detecting abnormalities. This segmentation allows each module to perform its specific function efficiently while maintaining overall system manageability
Solution Approach 2:
The patent designs a multi-functional packet processing system that can perform multiple operations including packet capture, parsing, analysis, and authentication using a unified architecture. This universal system handles both normal and abnormal packets through the same detection mechanism, reducing the need for separate specialized components
3Speed
If GTP packets are transmitted without validation mechanisms, then transmission speed is maintained, but abnormal packets can cause forced termination of normal data calls
Solution Approach 1:
The patent performs preliminary validation of GTP packets including structure verification and authentication checks before they are routed through the network. This preliminary action prevents abnormal packets from causing call terminations while maintaining transmission speed for validated packets
Solution Approach 2:
The patent implements a fast-path mechanism where packets that pass initial validation checks are rapidly forwarded through the network without undergoing extensive analysis. This allows normal packets to maintain high transmission speed while abnormal packets are identified and handled separately through more thorough validation
Data Source
AI summary
Provided are a system and method for preventing the intrusion of an abnormal GPRS tunneling protocol (GTP) packet. The system includes: a system management unit including a monitoring unit which monitors a state of the system and a mode changing unit which changes an operation mode of the system based on the state of the system; a packet capture unit including a packet management unit which stores information about a GTP packet based on the operation mode of the system and a detection result checking unit which determines whether to drop the GTP packet; and a packet detection unit including a packet parsing unit which parses the information about the GTP packet and a packet analysis unit which analyzes the parsed information about the GTP packet, wherein the operation mode of the system is an intrusion prevention system (IPS) mode or a bypass mode.