Roaming Data Routing Control Using Private Network Breakout
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Solution Overview
Problem
Existing mobile communication networks experience inefficiencies in roaming scenarios due to lengthy communication paths requiring extensive operator agreements and causing latency, which can lead to subscriber dissatisfaction.
Innovation Solution
A method and control system for routing data traffic in roaming scenarios by detecting if a terminal device is served by a private network, and selectively assigning network nodes for managing the routing based on detection results, including technical parameters and regional considerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If home routing approach is used to route traffic from visited network to home network, then routing management is simplified, but communication path becomes long causing latency and subscriber dissatisfaction
Solution Approach 1:
The patent segments the routing management function by introducing local breakout points at visited networks that can independently handle data traffic routing. This divides the monolithic home routing approach into distributed routing decisions, allowing local traffic to be routed directly without returning to the home network, thus reducing latency while maintaining simplified management through policy-based control.
Solution Approach 2:
The patent introduces intermediary entities (local breakout points and policy control functions) between the visited network and home network. These intermediaries enable direct local routing for data traffic while maintaining the home network's control over authentication and subscription management, effectively mediating between the need for simple management and low-latency communication.
2Loss of time
If local breakout approach is used to route data traffic directly from visited network to data network, then communication latency is reduced, but more sophisticated routing solutions and agreements are required
Solution Approach 1:
The patent implements dynamic routing management where the system can adaptively select between home routing and local breakout approaches based on real-time conditions. The policy control functions dynamically determine routing paths, enabling the network to optimize for latency when local breakout is available while falling back to home routing when simpler management is prioritized, thus balancing performance and complexity.
Solution Approach 2:
The patent changes key routing parameters by introducing policy-based control that dynamically adjusts routing behavior. Instead of fixed routing rules, the system modifies routing parameters (such as breakout point selection, path determination) based on subscription data, network conditions, and service requirements, allowing flexible optimization without permanent complexity increases.
3Ease of manufacture
If home routing is used for all roaming traffic, then operator agreements are extensive but routing is straightforward, but this causes long communication paths and subscriber dissatisfaction
Solution Approach 1:
The patent enables self-service routing where local breakout points at visited networks autonomously handle data traffic routing decisions based on locally cached policy information. This eliminates the need for all traffic to traverse the home network, providing straightforward local routing implementation while dramatically improving subscriber experience through reduced latency and enhanced service quality.
4Adaptability or versatility
If extensive operator agreements are established for home routing, then routing coverage is comprehensive, but the communication path becomes lengthy causing latency
Solution Approach 1:
The patent adds a spatial dimension to routing by introducing geographically distributed local breakout points at visited networks. Instead of a single centralized home routing path, traffic can now break out locally at multiple geographic locations, creating parallel routing dimensions that maintain comprehensive roaming coverage while eliminating the necessity of lengthy communication paths through direct local data network access.
Data Source
AI summary
Disclosed is a solution for controlling a routing of data traffic of a roaming ter-minal device with data network, the method includes: detecting if the terminal device is served by a private network, and in accordance with a detection re-sult performing one of: selecting a network node of the private network for managing the routing if the roaming terminal device is served by the private network; or selecting a network node of a mobile communication network for managing the routing if the terminal device is not served by the private net-work, the method further including: generating a control signal to a respective network the selected network node resides for assigning a responsibility for managing the routing.