Smooth Cutover Mechanism for CDMA2000 Network Reliability

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Solution Overview

Problem

Existing cutover processes in CDMA2000 networks often result in service interruptions due to the disconnection and reconnection of control and media plane interfaces, which negatively impact user satisfaction and service reliability.

Innovation Solution

A method and device for smooth cutover that maintains continuous service by establishing a second connection and transferring resources, allowing services to be rerouted without interrupting existing connections, using a routing selection module and resource transfer operation module to manage and block resources as needed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the old connection is disconnected and a new connection is created during cutover, then the network elements can be replaced or upgraded, but service interruption occurs

Engineering Contradiction:

Improvenetwork element replacement capabilityVSAvoidservice continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent establishes a new connection (second connection) before disconnecting the old connection (first connection). The device for performing cutover operations maintains both connections simultaneously, transfers services from the first connection to the second connection, and only then disconnects the first connection. This preliminary establishment of the new connection ensures service continuity during the cutover process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces a connection transfer mechanism as an intermediary process between the old and new connections. The service transfer function acts as a mediator that gradually moves services from the first connection resources to the second connection resources, ensuring that services are not interrupted during the transition. This intermediary transfer process resolves the contradiction by providing a smooth transition path.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If cutover operations are performed quickly to minimize impact, then productivity is improved, but service reliability may be compromised

Engineering Contradiction:

Improvecutover speedVSAvoidservice interruption risk

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent ensures continuous service action during cutover by maintaining the first connection active while establishing and transferring services to the second connection. The device for performing cutover operations keeps both connections operational during the transfer process, ensuring that services continue without interruption. This continuity approach allows for reliable service maintenance while completing cutover operations efficiently.

Inventive Principle:

Principle #20Continuity of useful action

3Reliability

If multiple connection resources are maintained during cutover, then service continuity is ensured, but device complexity increases

Engineering Contradiction:

Improveservice continuityVSAvoidconnection management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the connection resources into distinct first connection resources and second connection resources, each with specific functions. The device for performing cutover operations manages these segmented resources separately, with the service transfer function selectively moving services from one segment to another. This segmentation makes the complex multi-connection management more organized and controllable, reducing the perceived complexity while maintaining reliability.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8717877B2Method for completing smooth cut-over, device and equipment for performing cut-over operations

Publication Date: 2014.05.06 ZTE CORP

AI summary

The present invention provides a method for completing smooth cut-over and a device and equipment for performing cut-over operations. The method comprises: when the device for performing cut-over operations maintains a first connection with the first cut-over device via a first interface, establishing a second connection with a second cut-over device via a second interface, and transferring the services carried on the connection resources between the device for performing cut-over operations and the first cut-over device, that is, the first connection resources, to the connection resources between the device for performing cut-over operations and the second cut-over device, that is, the second connection resources. The present invention does not interrupt services during the cut-over procedure, without affecting the normal service usage by the user, thus improving the security and reliability of cut-over.