Network Switch Integrated WLAN Radios Channel Assignment
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Solution Overview
Problem
In wireless local area networks (WLANs), especially in distributed antenna systems, there is a challenge in minimizing signal interference between adjacent WLAN radio devices and antennas, which can lead to undesirable RF signal coupling and interference.
Innovation Solution
A network switch device with integrated WLAN radio devices is configured to determine distances between antennas and radio devices, and a method is employed to assign channels in a way that minimizes interference by calculating sums of reciprocal distances for each channel, ensuring that the channel with the lowest sum is selected for each device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channels are assigned to APs in a distributed antenna system, then network coverage is provided, but signal interference occurs between adjacent antennas and radio devices
Solution Approach 1:
The system changes the channel assignment parameter based on the spatial distance parameter between adjacent radio devices. By calculating distances between radio devices and using these distances to determine channel assignments, the system optimizes the channel parameter to minimize interference while maintaining network coverage.
2Object-affected harmful factors
If adjacent APs are assigned different channels to minimize interference, then signal interference is reduced, but channel assignment complexity increases
Solution Approach 1:
The system performs self-configuration by automatically calculating distances between radio devices and determining optimal channel assignments without manual intervention. The processing system autonomously measures spatial relationships and assigns channels to minimize interference, eliminating the need for manual channel configuration.
Solution Approach 2:
The system uses feedback from distance measurements between radio devices to adjust channel assignments. By continuously monitoring the spatial relationships and using this feedback to optimize channel allocation, the system dynamically adapts to minimize interference while maintaining network performance.
3Device complexity
If centralized channel assignment is used, then channel optimization is simplified, but system responsiveness to spatial changes is reduced
Solution Approach 1:
The system performs preliminary distance calculations between radio devices during the initialization phase. By pre-calculating spatial relationships and using these pre-computed distances to establish initial channel assignments, the system optimizes the assignment process while maintaining responsiveness to spatial changes.
Data Source
AI summary
A wireless network switch device includes wired-network switch circuitry and wireless local-area network (WLAN) radio devices integrated together within a common housing. WLAN antennas that are distributed about the WLAN coverage area can be coupled to antenna ports on the device housing. Channels are assigned to the WLAN radio devices and corresponding antennas in a manner that promotes minimization of signal interference between adjacent WLAN radio devices in the housing as well between adjacent antennas.