MME Notifies eNodeB of RAT Priority for RRM

Solution Overview

Problem

In mobile communication systems, the evolved base station (eNodeB) cannot obtain Radio Access Technology (RAT) / Frequency Selection Priority information of User Equipment (UE) due to the lack of notification from the Mobile Management Entity (MME), which hinders Radio Resource Management and affects system performance.

Innovation Solution

The MME notifies the eNodeB of RAT / Frequency Selection Priority information by adding a parameter to the Initial Context Setup Request message during initial attach or Track Area Update procedures and to the UE Context Modification Request message when the UE is in the Active state, ensuring the eNodeB receives this critical information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the MME stores the RAT/Frequency Selection Priority information obtained from HSS, then the information is preserved for future use, but the eNodeB cannot obtain this information because the MME does not notify the eNodeB

Engineering Contradiction:

Improveinformation availabilityVSAvoidRAT/Frequency Selection Priority information

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent implements a feedback mechanism where the MME sends notifications to the eNodeB when RAT/Frequency Selection Priority information is obtained or modified. Specifically, when the MME receives updated subscription information from the HSS, it triggers a notification procedure to inform the serving eNodeB of the updated information, ensuring the eNodeB has current data for RRM decisions.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent uses the MME as an intermediary between the HSS and eNodeB. The MME obtains information from the HSS, stores it locally, and then acts as a mediator to notify the eNodeB of this information. This intermediary role allows the MME to manage information distribution and ensure proper notification chains are followed.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the HSS sends Insert Subscriber Data message to notify MME of modified RAT/Frequency Selection Priority information, then the MME receives the updated information, but the eNodeB still cannot perform RRM because the MME does not trigger notification procedures

Engineering Contradiction:

Improvesubscription information updatesVSAvoidRadio Resource Management performance

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent establishes a feedback loop where the MME monitors for changes in subscription information from the HSS. When modifications are detected (such as updated RAT/Frequency Selection Priority information), the MME automatically triggers notification procedures to inform the eNodeB, ensuring the network elements have synchronized information for effective RRM.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent implements preliminary action by having the MME proactively notify the eNodeB of upcoming or current changes in RAT/Frequency Selection Priority information. Rather than waiting for the eNodeB to request information, the MME anticipates the need for updated data and initiates notification procedures in advance, allowing the eNodeB to prepare for optimized resource management.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If the eNodeB needs RAT/Frequency Selection Priority information to perform Radio Resource Management, then system performance can be improved, but the eNodeB cannot obtain this information because no notification mechanism exists from MME to eNodeB

Engineering Contradiction:

ImproveRadio Resource Management efficiencyVSAvoidRAT/Frequency Selection Priority information

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent implements a feedback mechanism where the MME sends notifications to the eNodeB when RAT/Frequency Selection Priority information is obtained or modified. Specifically, when the MME receives updated subscription information from the HSS, it triggers a notification procedure to inform the serving eNodeB of the updated information, ensuring the eNodeB has current data for RRM decisions.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent uses the MME as an intermediary between the HSS and eNodeB. The MME obtains information from the HSS, stores it locally, and then acts as a mediator to notify the eNodeB of this information. This intermediary role allows the MME to manage information distribution and ensure proper notification chains are followed.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP2273834B1Method, system and equipment for notifying user's information

Publication Date: 2016.02.17 CHINA ACAD OF TELECOMM TECH

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AI summary

The present invention discloses a user information notifying method, system and apparatus. In the present invention, a MME obtains RAT / Frequency Selection Priority information of UE, and notifies an eNodeB of the information. According to the method, system and apparatus of the present invention, the eNodeB can obtain the RAT / Frequency Selection Priority information of the UE, and further perform Radio Resource Management according to the information, thereby improving system performance.