WLAN Station Channel Usage Response for Coexistence
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Solution Overview
Problem
Next-generation WLAN systems require efficient channel allocation to support high-throughput operations, including non-infrastructure networks and off-channel TDLS direct links, while ensuring coexistence with infrastructure networks, to enhance traffic processing efficiency.
Innovation Solution
A method and apparatus for operating a station in a WLAN system, which involves receiving a channel usage response from an access point containing channel usage information and transmit power regulation, allowing for the selection and operation of recommended channels and transmit power settings for non-infrastructure networks or off-channel TDLS direct links, thereby enabling efficient frame exchange between stations and access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel allocation is optimized for high-throughput operations including non-infrastructure networks and off-channel TDLS direct links, then traffic processing efficiency is improved, but channel overlap with infrastructure networks may occur causing interference
Solution Approach 1:
The patent segments channel allocation into distinct categories: infrastructure network channels and non-infrastructure channels (for TDLS and non-infrastructure networks). The access point maintains separate channel lists and uses specific indication bits in beacon frames to distinguish between these segments, allowing simultaneous operation without interference
Solution Approach 2:
The patent applies local quality by providing differentiated channel information to different station types. Infrastructure stations receive infrastructure channel recommendations while non-infrastructure stations receive separate channel recommendations. The access point uses usage mode fields to indicate whether recommended channels are for infrastructure or non-infrastructure use, ensuring each station operates on appropriate channels without overlap
2Speed
If multiple channel bandwidth options (20 MHz, 40 MHz, 80 MHz, 160 MHz) are supported for high throughput, then data processing speed is improved, but transmit power regulation complexity increases
Solution Approach 1:
The patent implements parameter changes by providing multiple maximum transmit power fields corresponding to different channel bandwidths (20 MHz, 40 MHz, 80 MHz, 160 MHz). The access point includes a transmit power information field indicating which power fields are present, and stations select appropriate power levels based on their operating bandwidth. This allows high throughput operation at 160 MHz while maintaining simple power regulation for stations operating at lower bandwidths
Data Source
AI summary
A method of operating in a wireless local area network system is provided. The method includes receiving a channel usage response from an access point, the channel usage response comprising channel usage information and transmit power regulation information, the channel usage information being for coexistence with an infrastructure network, and operating by using the channel usage information. The channel usage information includes at least one channel entry field indicating at least one recommended channel and a usage mode field indicating usage of the at least one recommended channel listed in the at least one channel entry field. The transmit power regulation information includes a plurality of maximum transmit power fields. Each of maximum transmit power field specifies a maximum transmit power limit for transmission on a corresponding channel bandwidth.