Visited Network Local Breakout for Roaming Signal Delay
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Solution Overview
Problem
Conventional telecommunication technologies experience signal delay and inefficiencies when user equipment roams to visited networks, especially when the routing distance to the local network is large, affecting real-time applications like VoIP, due to reliance on the local network for data transmission and communication.
Innovation Solution
The user equipment directly obtains an access point name from the visited network, which performs an authority check with the local network, allowing it to use services without relying on the local network for communication, involving steps like transmitting an access point name query, performing an authority check, and allocating radio resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile equipment routes all communications through the local network when roaming, then the mobile equipment can maintain service continuity, but the signal transmission delay increases
Solution Approach 1:
The visited network acts as an intermediary between the mobile equipment and the local network. Instead of direct routing through the local network, the visited network provides APN services that enable local breakout, allowing data to be routed locally while maintaining service continuity. This mediator approach reduces transmission delay while preserving reliable service connection.
2Ease of operation
If the mobile equipment uses the access point name built in the SIM for communication, then the communication interface between the mobile equipment and the gateway is established, but the routing distance increases causing worse delay
Solution Approach 1:
The system implements local quality by allowing different routing paths for different types of traffic. The visited network provides local APN services that enable local breakout for data traffic, while voice and other services can still use traditional routing. This localized optimization reduces delay for data communication while maintaining ease of interface establishment.
3Loss of time
If the visited network provides local breakout service, then the signal transmission delay is reduced, but the device complexity increases
Solution Approach 1:
The visited network's service gateway is designed with multi-functionality, handling both traditional routed traffic and local breakout traffic through the same infrastructure. The APN service provides universal access points that can serve multiple purposes: local data routing, service authorization, and maintaining compatibility with existing networks. This universality reduces the need for separate dedicated infrastructure, thereby limiting the increase in device complexity.
Data Source
AI summary
A telecommunication method for a user equipment roaming to a visited network is provided. A local network provides a telecommunication service to a user corresponding to the user equipment. In the telecommunication method, a service is started on the user equipment. According to the started service, the user equipment transmits an access point name query to the visited network. According to the access point name query, the visited network performs an authority check procedure with the local network on the user. When the user passes the authority check procedure, the visited network delivers an access point name corresponding to the service to the user equipment and the user equipment starts the service through the access point name.