Relay Device Handover Threshold Management

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Solution Overview

Problem

Movable relay devices functioning as base stations face challenges in efficiently managing communication relay functions, particularly in switching between on and off states, which can lead to frequent reconnection issues when communication terminals hand over from the relay device to a radio base station.

Innovation Solution

A relay device with a relay function management switch and a change command transmitter that sends handover threshold change commands to communication terminals, allowing for seamless handover by increasing the handover threshold, thereby ensuring communication terminals are transferred to the radio base station before the relay function is switched off.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the relay function is switched off directly, then the relay device can be deactivated, but frequent reconnection issues occur when communication terminals hand over from the relay device to the radio base station

Engineering Contradiction:

Improverelay function switchingVSAvoidcommunication connection stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system performs preliminary actions by transmitting handover threshold change commands to communication terminals before the relay function is switched off. This ensures that terminals are prompted to hand over to the radio base station in advance, preventing connection interruptions when the relay function is deactivated.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system monitors communication quality between the relay device and communication terminals, and provides feedback by adjusting handover thresholds dynamically. When communication quality deteriorates or the relay function is about to be switched off, the system sends commands to change handover thresholds, ensuring smooth handover and maintaining connection stability.

Inventive Principle:

Principle #23Feedback

2Reliability

If the handover threshold is increased to ensure smooth handover, then communication terminals are transferred to the radio base station before relay function switches off, but this may delay handover decisions

Engineering Contradiction:

Improvehandover smoothnessVSAvoidhandover timing

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system transmits handover threshold change commands in advance before the relay function is switched off, allowing communication terminals to prepare for handover. This preliminary action ensures that handover occurs smoothly without abrupt connection changes, while the timing is controlled to complete before relay deactivation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The handover threshold is dynamically adjusted based on communication conditions and relay device status. The threshold is increased when necessary to ensure smooth handover, and the system monitors the process to ensure handover completes within appropriate time frames, balancing smoothness and timing requirements.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11368210B2Relay device, program, communication system, and communication method

Publication Date: 2022.06.21 HONDA MOTOR CO LTD

AI summary

There is provided a relay device for relaying communication between a radio base station and a communication terminal, the relay device including a relay function management switch that switches on and off a relay function for relaying communication between a radio base station and a communication terminal of a relay means; and a change command transmitter that transmits, to the communication terminal, a change command of a handover threshold for the communication terminal establishing a wireless communication connection with the relay device when the relay function management switch switches the relay function off.