Multi-Interface Wi-Fi Channel Switching in DFS Bands
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication apparatuses with multiple interfaces face inefficiencies in channel management when using DFS bands, particularly in Wi-Fi Direct (WFD) Release2, due to restrictions on using the same frequency channel as a Group Owner (GO) and Station (STA), leading to unnecessary channel changes that reduce efficiency.
Innovation Solution
A communication apparatus with multiple interfaces that confirms and synchronizes frequency channel changes across all interfaces upon receiving a Dynamic Frequency Selection (DFS) trigger, ensuring that all interfaces either change or maintain channels within DFS bands in coordination, thereby preventing unnecessary changes and maintaining efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a communication apparatus uses multiple communication interfaces concurrently in DFS band, then communication versatility is improved, but channel management complexity increases due to coordination requirements between interfaces
Solution Approach 1:
The patent merges the channel management of multiple communication interfaces by synchronizing their DFS operations. When a radar signal is detected on any interface, all interfaces perform channel switching simultaneously, consolidating what would otherwise be separate management tasks into a unified process.
Solution Approach 2:
The communication apparatus is designed to handle multiple communication interfaces with different standards (Wi-Fi, Wi-Fi Direct, Bluetooth) through a universal DFS management mechanism. The system monitors radar signals across all interfaces and applies coordinated channel switching, making the DFS functionality applicable to diverse communication scenarios.
2Ease of operation
If channel switching is performed independently on each communication interface, then interface autonomy is improved, but communication efficiency deteriorates due to unnecessary channel changes
Solution Approach 1:
The system implements feedback mechanisms where each communication interface reports its channel usage and radar detection status to a central control unit. This feedback enables the system to make informed decisions about coordinated channel switching, balancing interface autonomy with overall communication efficiency.
Solution Approach 2:
The channel switching mechanism is made dynamic by allowing the system to adapt its behavior based on real-time conditions. When radar signals are detected, the system dynamically coordinates channel changes across interfaces; when no radar is present, interfaces can operate independently, optimizing efficiency for each scenario.
3Manufacturing precision
If all communication interfaces switch channels simultaneously upon radar detection, then coordination accuracy is improved, but response time increases due to synchronization overhead
Solution Approach 1:
The system performs preliminary actions by maintaining a ready state for channel switching across all interfaces. When radar detection occurs, the coordinated switching can execute immediately because the infrastructure is pre-configured, reducing the actual response time while maintaining synchronization accuracy.
Solution Approach 2:
The patent implements optimized channel switching that skips unnecessary intermediate steps. By directly transitioning all interfaces to the new channel simultaneously upon radar detection, the system rushes through the critical switching phase, minimizing the time loss associated with synchronization while ensuring accurate coordination.
Data Source
AI summary
A communication apparatus that concurrently performs communication with an access point using a first communication interface as a station and communication with another apparatus functioning as a Client using a second communication interface as a Group Owner of a Wi-Fi Direct standard changes, in a case where a first wireless frame indicating a change of a frequency channel in use is received from the access point during a time when the first communication interface uses a frequency channel in a predetermined frequency band that needs support of a Dynamic Frequency Selection function and where the second communication interface uses a same frequency channel in the predetermined frequency band as that of the first communication interface, the frequency channel of the first communication interface and the second communication interface based on the first wireless frame.