Serving Gateway Support Node Connectivity Redirection

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Solution Overview

Problem

In radio telecommunications networks, when a serving gateway or home gateway fails, or when the connection between the serving gateway support node and a serving gateway fails, existing systems force mobile devices to re-establish connections, leading to network overload and user disconnection.

Innovation Solution

A serving gateway support node that detects connectivity loss redirects the user equipment's connection to another serving gateway and home gateway without interrupting service, using echo response units, error reception units, and a serving gateway selector to manage the handover and resource allocation, ensuring seamless roaming and reduced network load.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the serving gateway support node forces mobile devices to re-establish connections upon gateway failure, then connection reliability is improved, but network overload increases and user convenience deteriorates

Engineering Contradiction:

Improveconnection reliabilityVSAvoidnetwork capacity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The serving gateway support node proactively detects connectivity loss through echo requests before the mobile device notices the failure. By detecting the failure early and initiating re-establishment procedures in advance, the system prevents the device from attempting multiple failed connection attempts, thereby reducing network overload while maintaining connection reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The serving gateway support node acts as an intermediary between the mobile device and the serving gateway. It monitors the health of serving gateways using echo requests and orchestrates the re-establishment of connections when failures are detected, shielding mobile devices from direct failure impacts and reducing unnecessary re-establishment requests from devices.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the serving gateway support node forces mobile devices to re-establish connections upon gateway failure, then connection reliability is improved, but user convenience deteriorates

Engineering Contradiction:

Improveconnection reliabilityVSAvoiduser convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system performs preliminary detection of gateway failures through echo requests before the mobile user experiences any disruption. By detecting and handling failures proactively at the network level, the system maintains seamless connectivity for users, preventing them from noticing the failure or needing to manually re-establish connections.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The serving gateway support node serves as an intermediary that absorbs and handles connection failures transparently. It detects gateway unavailability through echo requests and manages the re-establishment process in the background, shielding users from disruption and maintaining ease of operation while ensuring connection reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Speed

If echo requests are sent frequently to detect gateway failures, then failure detection speed is improved, but network overhead increases

Engineering Contradiction:

Improvefailure detection speedVSAvoidnetwork overhead

Core Design Contradiction:

SpeedVSQuantity of substance

Solution Approach 1:

The system sends echo requests at controlled intervals rather than continuously, using just enough monitoring traffic to detect failures promptly while avoiding excessive network overhead. This partial action approach balances fast failure detection with minimal impact on network resources.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

Echo requests are sent periodically at predetermined intervals to the serving gateway. This periodic monitoring provides timely failure detection while maintaining a predictable and manageable level of network overhead, avoiding both continuous traffic and infrequent checking.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS8797846B2Transfer of connections triggered by a MME in case of failure of a serving gateway

Publication Date: 2014.08.05 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A serving gateway support node for a radio telecommunications network, in which the serving gateway support node is arranged to control at least one serving gateway to connect user equipment to a packet-based network via a home gateway and is also arranged to cause each serving gateway to hand over the connections between the user equipment and the packet-based network to other serving gateways while maintaining the user equipment's connection to the packet-based network as the user equipment roam throughout the radio telecommunications network, in which the serving gateway support node is arranged to detect a loss of connectivity The serving gateway support node is arranged to re-establish the connection from the user equipment to the packet-based data network via a serving gateway and a home gateway without interrupting the connection of the user equipment to the packet-based network.