WLAN Tone Interleaving Across Wide Channels to Limit Burst Errors
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Solution Overview
Problem
Existing tone interleaving methods for WLAN wireless communication are inadequate for wider channel bandwidths and multiple bands, leading to reduced throughput and increased error rates due to burst errors.
Innovation Solution
A method for tone mapping that divides wireless channels into subcarriers, mapping consecutive complex constellation points to nonadjacent tones using a tone mapping distance parameter, specifically utilizing an 80 MHz channel bandwidth with 996 tones as a building block to implement efficient tone interleaving schemes for wider bandwidth channels like 240 MHz or 320 MHz, thereby enhancing throughput and mitigating burst errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing tone interleaving methods are used for wider channel bandwidths, then device complexity is reduced, but throughput is reduced and error rates increase due to burst errors
Solution Approach 1:
The patent segments the wide bandwidth channel into multiple subcarriers (e.g., dividing a 320 MHz channel into multiple 80 MHz subcarriers). Each subcarrier is then independently tone-mapped using established methods, which simplifies the overall process while enabling efficient utilization of the wide bandwidth. This segmentation allows the system to achieve high throughput across wide channels without requiring entirely new complex tone mapping algorithms.
2Reliability
If existing tone interleaving methods are used for wider channel bandwidths, then implementation is simpler, but reliability deteriorates due to increased error rates from burst errors
Solution Approach 1:
By dividing the wide bandwidth channel into multiple subcarriers and applying tone mapping to each subcarrier separately, the patent ensures that burst errors affecting one subcarrier do not propagate across the entire wide bandwidth channel. This segmentation approach improves reliability by isolating error effects while maintaining manageable complexity through the use of established tone mapping techniques on each segment.
Solution Approach 2:
The patent applies tone mapping locally to each subcarrier rather than attempting a global tone mapping approach across the entire wide bandwidth channel. This local quality approach allows each subcarrier to be optimized independently, improving error resilience while keeping the implementation complexity manageable through reuse of proven local tone mapping methods.
3Productivity
If wider channel bandwidths are utilized, then throughput is enhanced, but the effectiveness of existing tone interleaving methods is reduced
Solution Approach 1:
The patent enables wide bandwidth utilization by segmenting the channel into subcarriers, which allows existing effective tone interleaving methods to be applied to each subcarrier. This approach maintains the proven effectiveness of established interleaving techniques while enabling the system to exploit wider bandwidths for enhanced throughput, effectively bridging the gap between old methods and new requirements.
Data Source
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AI summary
Embodiments of the present invention provide a method and apparatus for tone interleaving wide channel bandwidths or transmissions using multiple-bands. Embodiments of the present invention are designed to accommodate new generations of WLAN. Preferably, existing communication standards of the current generations of WLAN are used to simplify the implementation of the tone mapping schemes described herein. For example, the present invention preferably uses an 80 MHz channel bandwidth with resource units having 996 tones as a building block to efficiently implement new tone mapping and interleaving schemes for wider bandwidth channels.