Relay Station Third Wireless Unit Handover Control

Solution Overview

Problem

Existing communication systems face instability and disconnection issues during handover processes in relay stations, particularly when mounted on moving objects, leading to potential service disruptions.

Innovation Solution

A relay station equipped with three wireless units and a controller that manages communication between base stations and wireless terminals, allowing for seamless handover based on position, time, or radio wave intensity, using the third wireless unit to switch control channels or connect with alternative base stations without disrupting ongoing communications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a relay station uses a single wireless unit for communication with base stations and wireless terminals, then the device complexity is reduced, but communication stability deteriorates during handover processes

Engineering Contradiction:

Improvecommunication stabilityVSAvoidwireless unit configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The relay station divides its wireless communication functionality into three separate wireless units: a first wireless unit for communicating with wireless terminals, a second wireless unit for communicating with base stations, and a third wireless unit specifically for handover operations. This segmentation allows each unit to specialize in specific communication tasks, ensuring that handover operations do not interfere with ongoing communications, thereby improving communication stability during handover processes.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The third wireless unit acts as an intermediary dedicated to handover operations. It establishes preliminary connections with target base stations and manages the handover process separately from the primary communication channels. This intermediary unit ensures that handover activities can proceed without disrupting the communication between the relay station, wireless terminals, and current base station, thus maintaining communication stability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the relay station executes handover using the same wireless unit that maintains current communication, then device complexity is reduced, but communication disconnection occurs during handover

Engineering Contradiction:

Improvecommunication continuityVSAvoidwireless unit structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The relay station segments its wireless communication functions into three distinct units, allowing the third wireless unit to handle handover operations independently while the first and second wireless units maintain stable communication with wireless terminals and base stations respectively. This prevents communication disconnection during handover by isolating handover activities to a dedicated unit.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The third wireless unit performs preliminary actions by establishing connections with target base stations before handover is required. It proactively manages the handover process, including establishing preliminary connections and preparing handover conditions, so that when handover becomes necessary, the transition can occur smoothly without interrupting ongoing communications through the first and second wireless units.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the relay station uses multiple wireless units for different communication functions, then communication stability during handover is improved, but the device complexity increases

Engineering Contradiction:

Improvehandover stabilityVSAvoidwireless unit configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

While the relay station uses multiple wireless units, each unit is designed with specific functional responsibilities that contribute to overall system efficiency. The first wireless unit handles wireless terminal communications, the second handles base station communications, and the third specializes in handover operations. This functional specialization within a multi-unit architecture achieves handover stability while minimizing unnecessary complexity by assigning clear, non-overlapping roles to each unit.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The relay station divides its wireless communication functionality into three separate wireless units: a first wireless unit for communicating with wireless terminals, a second wireless unit for communicating with base stations, and a third wireless unit specifically for handover operations. This segmentation allows each unit to specialize in specific communication tasks, ensuring that handover operations do not interfere with ongoing communications, thereby improving communication stability during handover processes.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS10313944B2Relay station and control method thereof

Publication Date: 2019.06.04 KYOCERA CORP

AI summary

A relay station relays communication between a base station and a wireless terminal, and the relay station includes: a first wireless unit, a second wireless unit and a third wireless unit, each of which communicates with at least one of the base station and the wireless terminal, wherein when the first wireless unit is connected to the wireless terminal and the second wireless unit is connected to the base station and when there is a trigger of handover, the third wireless unit is used to execute at least one of handover to another base station and handover to switch a control channel with the wireless terminal.