Communication Apparatus Roaming Interference Suppression
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Solution Overview
Problem
In wireless communication systems, network shifts can lead to interference between networks operating on the same frequency, degrading communication performance, especially when a communication apparatus functions as both an access point (AP) and a station (STA) and switches between networks.
Innovation Solution
A communication apparatus is configured with a determination unit to assess interference between frequency channels, a change unit to switch to non-interfering channels, and an execution unit to execute network roaming based on these assessments, ensuring minimal interference during network shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a communication apparatus performs communications in multiple networks concurrently, then network resource utilization is improved, but interference between networks occurs when frequency channels overlap
Solution Approach 1:
The determination unit proactively determines whether frequency channels have a mutual interference relationship before roaming occurs. The change unit preemptively changes the frequency channel of the third network if interference is detected, before the STA actually roams to the second network. This preliminary action prevents interference from occurring in the first place.
Solution Approach 2:
The system continuously monitors the frequency channels of multiple networks and uses this feedback information to determine interference relationships. Based on the feedback about which channels interfere with each other, the change unit dynamically adjusts the frequency channel selection to avoid interference while maintaining concurrent network operations.
2Ease of operation
If a STA roams to a network with the same frequency channel as its AP network, then network switching is simplified, but communication performance degrades due to interference
Solution Approach 1:
The determination unit acts as an intermediary that analyzes the frequency channel relationships between networks. It serves as a mediator between the roaming decision and the actual frequency channel usage, identifying potential interference issues and triggering appropriate channel changes before roaming occurs, thus protecting communication performance while allowing simple roaming operations.
3Object-generated harmful factors
If frequency channel changes are made proactively during roaming, then interference is suppressed, but additional control complexity is introduced
Solution Approach 1:
The control mechanism is segmented into distinct functional units: a determination unit that identifies interference relationships, a change unit that executes frequency channel changes, and an execution unit that performs roaming. This segmentation divides the complex control task into manageable, independent modules that work together to suppress interference while maintaining manageable system complexity.
Data Source
AI summary
A communication apparatus that performs wireless communication determines, in a case where an instruction of roaming from a first network to a second network is received from another communication apparatus after connecting to the first network, whether a first frequency channel used in the second network, and a second frequency channel used in a third network in which the communication apparatus can perform communication concurrently with the first network have a mutual interference relationship, changes, based on a fact that the first frequency channel and the second frequency channel have the mutual interference relationship, a frequency channel used in the third network to a third frequency channel having no mutual interference relationship with the first frequency channel, and executes roaming based on the instruction of roaming.