Base Station Handover Detection of Abnormal Cell Coverage

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Solution Overview

Problem

Wireless communication systems face issues with abnormal cell coverage areas, such as overshooting and island coverage, leading to interference and reduced communication quality due to unnecessary handovers and interference with other cell coverage.

Innovation Solution

A base station equipped with a communication interface, memory, and processor to detect abnormal areas by analyzing timing advance (TA) information from a network management device, identifying and resolving the impact on its own cell coverage when a user equipment (UE) handovers from another base station.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If base stations form cell coverage in wireless communication systems, then communication coverage is provided, but abnormal areas such as overshooting coverage and island coverage are generated that reduce communication quality

Engineering Contradiction:

Improvecell coverage areaVSAvoidabnormal area interference

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The base station proactively obtains abnormal area information from the network management device before handover decisions are made. By having this information prepared in advance, the base station can identify potential abnormal areas that might cause interference or unnecessary handovers, and take preventive actions to avoid communication quality degradation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements a feedback mechanism where the network management device provides abnormal area information back to the base stations. This feedback loop enables base stations to continuously update their handover decisions based on current abnormal area locations, allowing them to adapt to changing coverage conditions and avoid areas known to cause interference or ping-pong handovers.

Inventive Principle:

Principle #23Feedback

2Reliability

If base stations use pre-planned cell coverage, then interference between cells is reduced, but abnormal areas still occur due to actual wireless environment variations

Engineering Contradiction:

Improvecommunication qualityVSAvoidcoverage adaptability to environment

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The network management device continuously monitors and identifies abnormal areas in the actual wireless environment, providing feedback information to base stations. This enables the system to maintain reliable communication by adapting handover decisions to actual environmental conditions rather than relying solely on pre-planned coverage, thus resolving the conflict between reliability and environmental adaptability.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system changes the parameter of handover decision-making by incorporating abnormal area information as an additional factor. Instead of relying only on pre-planned coverage parameters, the base station modifies its handover behavior based on real-time abnormal area data, allowing it to adapt to environmental variations while maintaining communication quality.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If base stations perform handover based on signal strength, then user equipment can move between cells, but unnecessary handovers occur in abnormal areas causing ping-pong effect

Engineering Contradiction:

Improvehandover operationVSAvoidhandover stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The base station obtains abnormal area information in advance from the network management device before making handover decisions. By having this information prepared beforehand, the base station can identify abnormal areas that might trigger unnecessary handovers, and take preventive actions to maintain handover stability while still allowing normal handover operations in legitimate coverage areas.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The abnormal area information acts as an intermediary factor between signal strength measurements and handover execution. The base station uses this intermediate information to filter out spurious handover triggers caused by abnormal coverage areas, thereby maintaining ease of operation in normal areas while preventing ping-pong effects in abnormal areas.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12621728B2Base station for detecting abnormality of cell coverage and operating method thereof

Publication Date: 2026.05.05 SAMSUNG ELECTRONICS CO LTD

AI summary

A device and a method for detecting abnormality in cell coverage in a wireless communication system are provided. A base station includes a communication interface, a memory, and a processor operatively coupled to the communication interface and the memory. The processor is configured to obtain information related to an abnormal area from a network management device. The processor is configured to identify, in a case in which a user equipment (UE) handovers from another base station to the base station, whether the abnormal area is provided by the other base station based on the information related to the abnormal area. The processor is configured to detect, in a case in which the abnormal area is provided by the other base station, whether cell coverage of the base station is affected by the abnormal area provided by the other base station, based on information related to timing advance (TA) of the other base station.