Base Station Handover Parameter Optimization via Purpose Tracking

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Solution Overview

Problem

In LTE mobile communication systems, base stations face challenges in identifying the purpose of handover problems to optimize handover thresholds, as the source base station lacks information on handover purpose and thresholds when receiving handover reports from target base stations after the handover procedure is completed.

Innovation Solution

The method involves transmitting handover purpose and related information from the base station to the terminal and then including this information in handover request messages to the target base station, allowing the source base station to configure and optimize handover parameters based on the identified purpose.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the source base station waits to receive handover reports from target base stations after handover completion, then it can detect handover problems, but it cannot identify the handover purpose or the handover threshold to be optimized

Engineering Contradiction:

Improvehandover problem detectionVSAvoidhandover purpose information

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The source base station performs preliminary actions by storing handover purpose information and related handover parameters before the handover problem occurs. When a handover problem is detected, this pre-stored information is immediately available for analysis, eliminating the information loss that would otherwise occur when waiting for post-handover reports.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary mechanism where the source base station maintains a local record of handover purpose information that acts as a mediator between the handover execution and the problem detection phase. This intermediary storage allows the source base station to retrieve handover purpose information without relying on post-handover reports from target base stations.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If different handover thresholds are used depending on handover purposes, then handover optimization can be achieved, but the source base station cannot identify which handover purpose caused the problem

Engineering Contradiction:

Improvehandover parameter optimizationVSAvoidhandover problem cause identification

Core Design Contradiction:

Manufacturing precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The patent implements a feedback mechanism where the source base station stores handover purpose information locally and uses this feedback to identify which specific handover purpose caused the detected problem. This allows the system to correlate handover problems with their corresponding purposes and optimize the appropriate handover thresholds.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The source base station performs preliminary action by pre-storing handover purpose information before the problem occurs. This preliminary record-keeping enables precise identification of the problematic handover purpose when optimization is needed, making the detection and measurement of problem causes straightforward.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the handover report is received after the handover procedure is completed, then the target base station can report handover problems, but the source base station cannot know the handover purpose or threshold to optimize

Engineering Contradiction:

Improvehandover problem reportingVSAvoidhandover parameter optimization timing

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The source base station performs preliminary action by storing handover purpose information immediately when the handover is initiated, rather than waiting for the post-handover report. This eliminates the time loss associated with waiting for problem detection and enables immediate optimization when issues are identified.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The source base station serves itself by maintaining local records of handover purpose information, eliminating the need to wait for information to be provided in post-handover reports from target base stations. This self-service approach to information management resolves both the reliability and timing issues.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS10945184B2Method and apparatus for supporting handover in wireless communication system

Publication Date: 2021.03.09 SAMSUNG ELECTRONICS CO LTD

AI summary

The present invention relates to a method and an apparatus for supporting handover and, more particularly, to a method and an apparatus for adjusting handover related parameters. In order to achieve the above-described objective, a method for supporting handover by a base station in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: transmitting a handover parameter to a terminal, based on a handover purpose; receiving, from the terminal, a handover measurement report based on the handover parameter; storing information for the handover purpose; and transmitting, to a target base station, a handover request message including the information for the handover purpose.