Local Gateway Data Interception in LBO Mobile Networks
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Solution Overview
Problem
In mobile networks, especially in Local Break Out (LBO) scenarios, it is currently impossible to intercept data events associated with interception targets as traffic is offloaded at an eNodeB or local gateway without being delivered to the Serving Gateway (S-GW), Packet Data Network Gateway (PDN-GW), or ePDG, rendering conventional interception methods ineffective.
Innovation Solution
A local gateway is configured to receive interception requests, intercept LBO data based on these requests, and transmit the intercepted data, enabling data interception in LBO scenarios by bypassing the conventional core network path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traffic is offloaded at eNodeB or local gateway in LBO scenario, then network load on core network is reduced, but data interception capability is lost
Solution Approach 1:
The patent introduces a local gateway as an intermediary device between the eNodeB and the core network. This local gateway intercepts user plane data locally before it is offloaded to the PDN, enabling lawful interception without requiring data to traverse through the core network gateways. The local gateway acts as a mediator that maintains interception capability while supporting LBO traffic offloading.
Solution Approach 2:
The patent segments the network architecture by separating the interception function from the core network gateways and placing it at the local gateway level. This segmentation allows traffic to be offloaded to the PDN while a portion of the data flow is diverted to the local gateway for interception purposes, thus maintaining both productivity improvement and reliability.
2Reliability
If conventional interception methods are used, then core network gateways can intercept data, but LBO traffic cannot be intercepted as it bypasses these gateways
Solution Approach 1:
The patent implements dynamic routing at the local gateway level, where user plane data can be dynamically diverted to the interception function based on interception requests. The system adapts to different traffic scenarios by selectively intercepting data at the local gateway when LBO is active, while maintaining standard routing when LBO is not applicable.
Solution Approach 2:
The local gateway is designed with multi-functionality, serving both as a traffic offloading point for LBO scenarios and as an interception point for lawful surveillance. This universal device handles both regular traffic routing and interception tasks, making the system adaptable to both LBO and traditional network architectures.
3Device complexity
If data is routed directly to PDN in LBO, then core network resources are freed, but interception targets become uninterceptable
Solution Approach 1:
The patent implements preliminary interception action at the local gateway before data is offloaded to the PDN. By intercepting data at this early stage in the LBO path, the system captures necessary information without requiring data to traverse through the core network, thus simplifying core network operations while maintaining interception capability.
Solution Approach 2:
The local gateway serves as an intermediary that captures data locally before it leaves the mobile network infrastructure. This intermediary position allows the system to intercept data with minimal impact on core network complexity, as the gateway handles interception locally without requiring core network involvement in the interception process.
Data Source
AI summary
The present disclosure provides a method and a device for data interception based on Local Break Out (LBO). The method includes: receiving, by a local gateway, an interception request to intercept data of an interception target; intercepting, by the local gateway, LBO data of the interception target based on the interception request, to obtain intercepted data; and transmitting, by the local gateway, the intercepted data. The present disclosure can solve the solving the problem in the related art that an interception target cannot be intercepted in an LBO scenario.