Application-Based Routing for Low-Latency Roaming Traffic
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Solution Overview
Problem
Existing mobile communication networks experience inefficiencies in roaming scenarios due to long communication paths and latency issues, requiring extensive roaming agreements between telecom operators, which can lead to subscriber dissatisfaction.
Innovation Solution
A control system and method for managing data traffic routing in roaming scenarios by determining policies based on PDU sessions, selecting optimal communication networks, and generating control signals to facilitate local breakout operations, thereby optimizing data traffic paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If home routing approach is used to route traffic through the home mobile communication network, then authentication and subscription management are maintained, but communication path length increases causing remarkable latency
Solution Approach 1:
The patent segments the routing function by introducing an intermediate control system that separates authentication/subscription management (handled by the home network) from actual data traffic routing (handled locally by the visited network). This allows the terminal to maintain reliable authentication while routing data traffic through a shorter local path, reducing latency.
Solution Approach 2:
The patent introduces a control system as an intermediary between the terminal device and the home mobile communication network. This control system receives routing requests, determines appropriate routing policies, and establishes direct data traffic paths through the visited network while maintaining the home network's authority over authentication and subscription management.
2Loss of time
If local breakout approach is used to route data traffic directly from the visited mobile communication network, then latency is reduced, but roaming agreements between telecom operators become more complex
Solution Approach 1:
The patent creates a universal control system that can be deployed by any visited network operator to manage local breakout routing. This control system handles multiple functions including receiving routing requests, determining routing policies, and establishing data paths, making the solution applicable across different operators and networks without requiring complex bilateral agreements for each pairing.
Solution Approach 2:
The control system enables the visited network to self-manage routing decisions for roaming terminals by automatically determining routing policies based on received requests and establishing appropriate data paths. This reduces the need for manual coordination and complex agreements between operators, as each network can independently manage its own routing infrastructure.
3Adaptability or versatility
If application-specific PDU sessions are established for each application, then routing flexibility is improved, but control system complexity increases
Solution Approach 1:
The patent implements dynamic routing where the control system receives routing requests from applications, determines appropriate routing policies in real-time based on current network conditions and application requirements, and establishes application-specific PDU sessions as needed. This dynamic approach provides routing flexibility while the automated policy determination process manages the complexity of handling multiple applications and sessions.
Data Source
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AI summary
A solution for controlling a routing of data traffic of a roaming terminal device (100) with data network (160) is provided, wherein in the solution the following steps are performed: receiving (210), from an application executed in the roam-ing terminal device (100), a request for establishing a connection over an application specific packet data unit, PDU, session; determining (220), based on the PDU session, at least one policy for routing the data traffic between the roaming terminal device (100) and the data network (160); and selecting (230), based on the at least one policy, a communication network (110; 120; 130; 140) for managing the routing of the data traffic of the roaming terminal device (100).