WLAN Resource Allocation Using Dynamic Puncturing for Unsafe Frequencies
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Solution Overview
Problem
Conventional systems fail to provide adequate and dynamic interference mitigation in wireless networks, particularly for dual-capable client devices experiencing interference between cellular and Wi-Fi networks, leading to degraded reception quality.
Innovation Solution
Client devices detect interference and report unsafe frequencies to the wireless access point (AP), which then performs dynamic frequency puncturing by allocating wireless resources to avoid or mitigate interference, using techniques such as bit filtering to notch out specific frequency ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple wireless networks operate in the same frequency bands and physical locations, then network coverage and service capability are improved, but interference between networks increases and reception quality deteriorates
Solution Approach 1:
The patent segments the frequency spectrum into multiple sub-channels or resource units. When interference is detected on certain frequencies, the system divides the affected channel and transmits only on the non-interfered sub-channels, thereby maintaining network coverage while avoiding interference-affected frequencies.
Solution Approach 2:
The patent implements dynamic frequency puncturing where the set of punctured frequencies is not fixed but adapts in real-time based on detected interference conditions. The system dynamically adjusts which frequency resources are available for transmission, switching between different frequency allocations as interference patterns change.
2Reliability
If frequency puncturing is performed to mitigate interference, then reception quality is improved, but the available bandwidth and transmission capacity are reduced
Solution Approach 1:
The patent applies partial frequency puncturing rather than complete channel avoidance. Instead of discarding entire channels, the system punctures only the specific frequency resources that are interfered with, maintaining transmission capacity on the remaining non-punctured sub-channels while still improving reception quality.
Solution Approach 2:
The patent changes the frequency domain parameters of the transmission by dynamically adjusting which sub-channels are punctured and which are available for data transmission. This parameter adjustment allows the system to optimize the trade-off between reception quality and transmission capacity based on current interference conditions.
3Adaptability or versatility
If dual-capability client devices use both cellular and Wi-Fi antennas concurrently, then service versatility is improved, but self-interference between transmitting and receiving antennas increases
Solution Approach 1:
The patent introduces frequency puncturing as an intermediary mechanism that mediates between the cellular transmitting antenna and Wi-Fi receiving antenna. By puncturing the frequencies where cellular transmission occurs during Wi-Fi reception, the system creates a frequency-domain separation that reduces self-interference while maintaining dual-capability functionality.
Data Source
AI summary
An unsafe frequency report from a client device is received, the unsafe frequency report indicating that the client device is experiencing interference on a set of frequencies. A set of safe frequencies is identified, for the client device, based on interference indicated in the unsafe frequency report, and dynamic puncturing is performed based on the unsafe frequency report, comprising identifying an allocation of wireless resources for the client device during a transmission opportunity based on the set of safe frequencies, where the allocation of wireless resources punctures one or more of the set of frequencies, and communicating with the client device using the allocation of wireless resources.