Simultaneously-Connectable Channel Switching Mechanism

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Solution Overview

Problem

Existing radio communication systems face disconnection issues during channel switching, as they do not effectively manage the transition between communication channels, leading to potential loss of connection and incorrect attribution of radio communication terminals.

Innovation Solution

Implementing a channel switching mechanism that allows phased switching to simultaneously-connectable channels with overlapping communication channel bands, maintaining attribution and controlling transmission power levels to ensure continuous communication and correct channel handover.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the radio base station releases its attribution to the original channel and switches to the destination channel directly, then the channel switching speed is improved, but the connection between the radio communication terminal and the base station is lost

Engineering Contradiction:

Improvechannel switching speedVSAvoidconnection maintenance

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The base station establishes attribution to the simultaneously-connectable channel before releasing the original channel attribution. This preliminary action ensures that the terminal can maintain connection throughout the transition, preventing disconnection while enabling efficient channel switching.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The simultaneously-connectable channel acts as an intermediary channel that bridges the original channel and the destination channel. By using this intermediate channel with overlapping frequency bands, the system maintains continuous connection during the transition, avoiding direct disconnection and reconnection.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If the radio communication terminal searches for a new destination to attribute to, then the correct base station attribution is improved, but the communication interruption time increases

Engineering Contradiction:

Improvebase station attribution accuracyVSAvoidcommunication interruption time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The base station performs preliminary attribution setup on the simultaneously-connectable channel before the terminal needs to search for a new destination. This allows the terminal to maintain its existing attribution relationship while the base station prepares the new channel, eliminating the need for time-consuming terminal-side searches.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses feedback mechanisms where the base station monitors terminal status and proactively manages channel transitions. The base station determines when to switch channels based on line status and performs the switching operation, using feedback from the terminal's communication state to ensure accurate attribution without terminal-side searching.

Inventive Principle:

Principle #23Feedback

3Object-affected harmful factors

If the system uses only non-interfering channels (ch1, ch6, ch11, ch14), then the channel interference is reduced, but the channel switching flexibility is limited

Engineering Contradiction:

Improvechannel interferenceVSAvoidchannel switching flexibility

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The system applies different quality requirements to different channels based on their usage context. Simultaneously-connectable channels with overlapping bands are used only during transition periods for specific terminals, while non-interfering channels are used for general communication. This local differentiation allows flexible use of overlapping channels without causing widespread interference.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system dynamically changes channel parameters (frequency, bandwidth, attribution status) based on the switching phase. During transition, the simultaneously-connectable channel operates with specific parameters that allow both original and destination channel communication. This parameter flexibility enables the system to use overlapping channels adaptively while maintaining interference avoidance during normal operation.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS7894840B2Method of simultaneously-connectible channel switching

Publication Date: 2011.02.22 NEC PLATFROMS LTD

AI summary

Disconnection of communication is prevented and a connecting relation is maintained between radio devices even when a communication channel is dynamically switched. Accordingly, when a first radio device switches a communication channel used for radio communication with a second radio device, the first radio device firstly switches to a simultaneously-connectable channel capable of a simultaneous communication with an original channel, and then switches to a destination channel.