Telecom Access Device Signaling Management During Core Failure
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Solution Overview
Problem
Telecommunications networks face congestion and service disruptions during partial or total failures, leading to an abnormally high influx of registration requests from terminals, causing network overload and prolonged wait times for users to reconnect.
Innovation Solution
An access device in the network detects failures and, upon receiving registration refresh requests, determines the remaining registration time and effective refresh period. If the remaining time is greater than or equal to the refresh period, it confirms registration without relaying the request to the core network, thereby reducing the load on the network and preventing terminals from entering recovery mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals send periodic registration refresh requests to maintain network connection, then network service continuity is ensured, but during network failures this causes abnormal influx of requests leading to network overload
Solution Approach 1:
The access device performs preliminary action by determining the remaining registration time at the core network before relaying registration refresh requests. This allows the access device to predict and prevent the abnormal influx of requests by identifying terminals that are likely to send excessive refresh requests during network failures, thereby maintaining network processing capacity while ensuring service continuity.
Solution Approach 2:
The access device acts as an intermediary between terminals and the core network. It intercepts registration refresh requests, determines remaining registration time, and selectively relays or blocks requests based on this determination. This intermediary function prevents the abnormal influx of requests from reaching the core network during failures while maintaining normal registration refresh operations during normal conditions.
2Reliability
If terminals enter recovery mode upon detecting network failure, then they can reestablish connection after failure, but this causes prolonged wait times and user dissatisfaction
Solution Approach 1:
The access device performs preliminary determination of remaining registration time before terminals enter recovery mode. By identifying terminals with sufficient remaining registration time, the system can prevent unnecessary recovery mode entry and immediate reconnection attempts, thereby reducing user wait times while ensuring reliable reconnection when actually needed.
Solution Approach 2:
The system implements feedback by monitoring remaining registration time and using this information to control terminal behavior. Terminals receive feedback about their registration status and are guided on whether to enter recovery mode or maintain normal operation, optimizing reconnection timing and reducing unnecessary wait times.
3Measurement precision
If access device relays all registration refresh requests to core network, then network registration accuracy is maintained, but network congestion occurs during failures
Solution Approach 1:
The access device performs preliminary determination of remaining registration time at the core network before relaying requests. This preliminary action allows the system to maintain registration accuracy by only blocking requests from terminals with sufficient remaining time, while preventing congestion by filtering out unnecessary requests during network failures.
Solution Approach 2:
The system applies local quality by treating different terminals differently based on their individual remaining registration time. Terminals with sufficient remaining time have their requests blocked, while terminals with insufficient remaining time have their requests relayed. This selective approach maintains overall registration accuracy while reducing total signaling traffic volume during failures.
Data Source
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AI summary
The invention relates to a method for managing signalling in a telecommunication network in which, during normal operation, a device (21) for accessing said network indicates a registration refresh period P to a terminal (10, 11). According to the invention, after the detection of a failure affecting the network core (22) by said access device (21) and after the reception of a registration refresh request from said terminal (10, 11) by said access device (21), the access device (21) determines the remaining refresh duration R at the network core for the terminal (10, 11) as well as the effective refresh period Q implemented by the terminal (10, 11) when the access device (21) has indicated a refresh period equal to P thereto. Moreover, in the event R = Q, the access device (21) sends a registration confirmation to the terminal (10, 11) without relaying said request to the network core (22).