Dynamic NPCA Primary Channel Selection Under OBSS Occupancy
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Solution Overview
Problem
Existing wireless networks fail to efficiently utilize non-primary channels due to predefined NPCA primary channels being occupied by OBSS signals, leading to resource waste and reduced bandwidth utilization.
Innovation Solution
Dynamically select the NPCA primary channel based on the bandwidth occupied by OBSS signals to minimize frequency gaps and enable NPCA in more situations, thereby allowing NPCA to be performed even when predefined channels are occupied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a predefined NPCA primary channel is used, then channel access is simplified and standardized, but bandwidth utilization decreases when the predefined channel is occupied by OBSS signals
Solution Approach 1:
The patent makes the NPCA primary channel dynamic by selecting it from multiple candidate channels based on real-time channel occupancy detection. Instead of using a fixed predefined channel, the system identifies which candidate channels are occupied by OBSS signals and selects an unoccupied channel as the NPCA primary channel, thereby adapting to changing channel conditions and improving bandwidth utilization while maintaining operational simplicity
Solution Approach 2:
The patent changes the parameter of the NPCA primary channel from a fixed value to a variable that can be selected from multiple candidates. By detecting channel occupancy and selecting an appropriate candidate channel, the system modifies the channel parameter dynamically to avoid occupied frequencies, thus resolving the contradiction between standardized access and efficient bandwidth utilization
2Productivity
If the NPCA primary channel is selected to avoid OBSS signals, then bandwidth utilization improves, but device complexity increases due to channel selection logic
Solution Approach 1:
The patent applies preliminary action by pre-identifying and storing multiple candidate NPCA primary channels before actual channel access is needed. The system prepares a list of potential channels in advance, so when channel access is required, the device can quickly select from pre-evaluated candidates based on simple occupancy checks, rather than performing complex real-time analysis, thus improving bandwidth utilization while limiting complexity increase
Solution Approach 2:
The patent segments the available frequency spectrum into multiple candidate channels that can serve as NPCA primary channels. By dividing the bandwidth into discrete selectable segments, the system simplifies the selection process to choosing one segment from a predefined set, making the channel selection logic more manageable while still achieving improved bandwidth utilization through avoidance of occupied segments
Data Source
AI summary
Disclosed herein is a method performed by a wireless device belong to a basic service set (BSS) to dynamically select a non-primary channel access (NPCA) primary channel. The method includes determining a bandwidth occupied by signals in an overlapping basic service set (OBSS), determining the NPCA primary channel to use for performing NPCA in the BSS based on the bandwidth occupied by the signals in the OBSS, and performing the NPCA in the BSS using the determined NPCA primary channel.