Mobile Station Location Registration Using Partial System Information

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Solution Overview

Problem

Mobile stations experience delays in receiving communication services due to the time required to acquire and process broadcast information and complete the Attach procedure, especially during location registration changes.

Innovation Solution

The mobile station initiates location registration processing using predetermined system information (MIB, SIB 1, and SIB 2) before acquiring all broadcasted system information, allowing it to start communication services sooner, even if the remaining information is not fully received.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the mobile station waits to acquire all system information before starting location registration processing, then the completeness of system information is improved, but the time to receive communication services increases

Engineering Contradiction:
Improvecompleteness of system informationVSAvoidtime to receive communication services
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The mobile station performs location registration processing in advance using predetermined system information (MIB, SIB1, SIB2) before acquiring all system information. This preliminary action allows the Attach procedure to start earlier, reducing the time to receive communication services while maintaining sufficient reliability for the registration process.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system information is segmented into predetermined information (MIB, SIB1, SIB2) required for location registration and remaining information (SIB3-SIB8). The mobile station uses only the predetermined segment to initiate location registration processing, separating the critical registration function from the optional additional information acquisition.

Inventive Principle:
Principle #1Segmentation

2Measurement precision

If the mobile station acquires all system information before location registration, then the accuracy of location registration is improved, but the processing time increases

Engineering Contradiction:
Improveaccuracy of location registrationVSAvoidprocessing time
Core Design Contradiction:
Measurement precisionVSDuration of action of moving object

Solution Approach 1:

The mobile station performs partial action by acquiring only the necessary predetermined system information (MIB, SIB1, SIB2) required for location registration processing, rather than acquiring all system information. This partial action is sufficient to complete the Attach procedure accurately while significantly reducing the processing time.

Inventive Principle:
Principle #16Partial or excessive action

3Productivity

If the mobile station starts location registration early with partial system information, then the service availability speed is improved, but the risk of incomplete registration increases

Engineering Contradiction:
Improveservice availability speedVSAvoidcompletion of location registration
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The mobile station performs preliminary location registration processing using predetermined system information to achieve fast service availability. The predetermined information (MIB, SIB1, SIB2) contains essential elements needed for successful Attach procedure completion, ensuring that the preliminary action has sufficient reliability while improving productivity.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS8855666B2Location registration processing method and mobile station
Publication Date: 2014.10.07 NTT DOCOMO INC
  • US8855666B2 patent drawing
  • US8855666B2 patent drawing
  • US8855666B2 patent drawing

AI summary

A location registration processing method according to the present invention includes steps of: starting, at a mobile station (UE), the location registration processing on the basis of predetermined system information, when acquiring the predetermined system information among a plurality of pieces of system information broadcasted by a radio base station (eNB), the predetermined system information including information necessary for performing the location registration processing; and acquiring the rest of the plurality of pieces of system information.