GUMMEI Mapping for Handover Context Retrieval

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing communication networks face challenges in handover processes between different communication networks due to mismapped RAT identities, leading to failure in selecting the correct CN node and obtaining user equipment context.

Innovation Solution

A method and device for accessing and obtaining user equipment context by judging whether Globally Unique Mobility Management Entity Identifiers (GUMMEI) or Global Unique Temporary Identity (GUTI) are allocated or mapped, allowing for the selection of the appropriate Mobility Management Entity (MME) or Serving General Packet Radio Service (SGSN) based on the identifiers, and reconstructing identities to obtain context from the original network nodes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If RAT identity mapping is used for handover between different communication networks, then handover capability between networks is improved, but incorrect CN node selection occurs due to mismapped identities

Engineering Contradiction:

Improvehandover capabilityVSAvoidCN node selection accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces an identity translation mechanism where the source RAT identity is mapped to a target RAT identity through an intermediary mapping relationship. The mapping module acts as a mediator that converts the source GUMMEI to a target GUMMEI format, enabling handover between different RATs while maintaining identity uniqueness and avoiding direct conflicts between different identity systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the identity parameters during handover by mapping the source RAT's GUMMEI parameters to target RAT's GUMMEI parameters. This involves transforming the identity structure to match the target network's requirements while preserving the unique identification capability, thus adapting the identity parameters to different network environments.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If temporary identities are reused across different networks, then resource utilization is improved, but identity confusion occurs leading to failed context retrieval

Engineering Contradiction:

Improveresource utilizationVSAvoidUE context retrieval

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent performs preliminary identity mapping and validation before handover execution. The mapping module pre-processes the source GUMMEI to generate the target GUMMEI, and the determination module validates the mapping relationship in advance, ensuring that the target CN node can be correctly identified before the actual handover occurs, thus preventing context retrieval failures.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements a feedback mechanism where the target CN node's ability to retrieve UE context is verified after identity mapping. If context retrieval fails, the system can identify that the mapping was incorrect and adjust accordingly, ensuring reliable handover while allowing temporary identity reuse across networks.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If strict identity uniqueness is enforced, then identity accuracy is improved, but flexibility in temporary identity allocation is reduced

Engineering Contradiction:

Improveidentity accuracyVSAvoidtemporary identity allocation flexibility

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent segments the identity management into different domains: source network identity space and target network identity space. Each network maintains its own identity uniqueness requirements, while the mapping module bridges these segments, allowing temporary identities to be reused across different network domains while maintaining accuracy within each domain.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent creates a universal identity mapping mechanism that can handle multiple RAT types and network configurations. The mapping module and determination module work together to provide a flexible framework that adapts to different network scenarios, allowing temporary identities to serve multiple functions across different networks while maintaining uniqueness where required.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11350317B2Method and device for accessing and obtaining user equipment context and user equipment identity

Publication Date: 2022.05.31 HUAWEI TECH CO LTD

AI summary

A method and device for accessing and obtaining user equipment (UE) context and UE identity are provided. The method for access includes: when a UE accesses a System Architecture Evolution (SAE) network, judging, by a network node, whether a Globally Unique Mobility Management Entity Identifier (GUMMEI) carried by the UE or a Mobility Management Entity Group Identity (MMEGI) in the GUMMEI is allocated or mapped by the SAE network; if the GUMMEI or MMEGI is allocated by the SAE network, selecting, by the network node, a Mobility Management Entity (MME) according to the GUMMEIA network device includes an identity attribute obtaining module and a network resource node allocation module. Therefore, the access of the UE is achieved.