Bandwidth Mode Indication via Scrambling Sequence Bits
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Solution Overview
Problem
Current technologies are unable to send new bandwidth modes to the receive end in wireless local area networks, limiting data communication efficiency as they only support four existing bandwidth modes.
Innovation Solution
The method involves using at least three bits in the scrambling sequence of frames to indicate new bandwidth modes, allowing for more than four types of bandwidth modes to be indicated, including 240 M and 320 M modes, by modifying the frame formats in non-high throughput and duplicated non-HT formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current bandwidth mode indication methods are used, then compatibility with existing devices is maintained, but new bandwidth modes (240M, 320M) cannot be indicated
Solution Approach 1:
The patent changes the number of bits used for bandwidth mode indication from 2 bits to 3 bits in the scrambling sequence initialization. This parameter change allows the system to indicate more than four bandwidth modes (including 240M and 320M) while maintaining compatibility with existing devices through version negotiation mechanisms.
2Adaptability or versatility
If 3 bits in scrambling sequence are used to indicate bandwidth mode, then more than four bandwidth modes can be indicated, but device complexity increases
Solution Approach 1:
The patent implements dynamic bandwidth mode indication where the number of bits used (2 or 3 bits) is determined based on device capabilities and negotiation results. This dynamic approach allows the system to adapt between simple and complex modes, reducing overall device complexity while maintaining the ability to indicate multiple bandwidth modes when needed.
Solution Approach 2:
The patent segments the bandwidth mode indication into different scenarios: existing devices use the traditional 2-bit indication, while EHT devices use the enhanced 3-bit indication. This segmentation allows different parts of the system to operate with appropriate complexity levels, avoiding unnecessary complexity in devices that don't require new bandwidth modes.
3Adaptability or versatility
If different frame formats are used for EHT and non-EHT devices, then new bandwidth modes can be indicated to EHT devices, but processing complexity increases
Solution Approach 1:
The patent performs preliminary device identification and capability negotiation before data transmission. By determining whether a device is an EHT device in advance, the system can prepare and use the appropriate frame format (with 2 or 3 bits for bandwidth mode indication), avoiding the need to process multiple frame formats simultaneously and reducing processing complexity.
Data Source
AI summary
When a first device is an EHT site, a second device generates a frame in a first non-HT format or a frame in a first non-HT duplicated format, where at least three bits in the first seven bits of a scrambling sequence of the frame in the first non-HT format or the frame in the first non-HT duplicated format indicate a bandwidth mode of a channel; or when a first device is a VHT site or an HE site that does not support an EHT, a second device generates a frame in a second non-HT format or a frame in a second non-HT duplicated format, where two bits in the first seven bits of a scrambling sequence of the frame in the second non-HT format or the frame in the second non-HT duplicated format indicate a bandwidth mode of a channel.