Distributed Tone Mapping Beyond 80 MHz for Higher Wi‑Fi Power
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Solution Overview
Problem
Existing wireless communication technologies face limitations in transmission power due to power spectral density (PSD) constraints, which restrict the range and throughput of distributed resource units (dRUs) to 80 MHz bandwidth, necessitating a solution to enhance distributed transmissions beyond this limit.
Innovation Solution
Implementing distributed tone mapping techniques that allocate tones across a distribution bandwidth greater than 80 MHz, allowing modulation and transmission of symbols on noncontiguous tones to increase transmit power without exceeding PSD limits, thereby enhancing signal-to-noise ratio (SNR) and transmission range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If distributed tone mapping is implemented across bandwidth greater than 80 MHz, then transmission power and signal-to-noise ratio are improved, but device complexity increases due to scheduling information processing and tone distribution requirements
Solution Approach 1:
The patent segments the frequency spectrum into multiple noncontiguous tones distributed across a bandwidth greater than 80 MHz. Each tone carries a portion of the total transmission power, allowing the system to achieve higher overall transmission power while maintaining compliance with PSD limits. The scheduling information is divided into control fields that allocate specific tones to different stations, enabling distributed access across the expanded bandwidth.
2Productivity
If distributed resource units are used across larger bandwidth, then transmission range and throughput are improved, but scheduling complexity increases due to the need to manage multiple dRUs and tone distributions
Solution Approach 1:
The scheduling information structure is designed to be universally applicable across different bandwidth configurations. The same basic scheduling framework can manage distributed resource units across 80 MHz, 160 MHz, 240 MHz, or 320 MHz bandwidths by adjusting the tone distribution parameters. This multi-functionality reduces scheduling complexity compared to requiring separate management systems for each bandwidth configuration.
3Reliability
If tones are spread across wider bandwidth, then power spectral density limits are satisfied with higher transmit power, but the complexity of tone mapping and demapping increases
Solution Approach 1:
The system changes the distribution bandwidth parameter to be greater than 80 MHz while maintaining the same tone mapping methodology. The patent defines specific distribution bandwidth options (80 MHz, 160 MHz, 240 MHz, 320 MHz) that can be configured based on regulatory requirements. This parameter-based approach allows the system to satisfy PSD limits across different bandwidth configurations without requiring fundamentally new tone mapping techniques for each configuration.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for extending distributed resource units (dRUs) beyond 80 MHz. Some aspects more specifically relate to supporting enhanced tone distribution mapping schemes and signaling. In some examples, a wireless station may receive, from an access point, scheduling information for a physical layer (PHY) protocol data unit (PDU) (PPDU) to be transmitted by one or more wireless stations including the wireless station over a wireless channel. The scheduling information may indicate one or more dRUs within the wireless channel, each dRU comprising a respective set of tones distributed across a distribution bandwidth of the wireless channel. The distribution bandwidth may be larger than 80 MHz, and the one or more dRUs including a first dRU allocated to the wireless station. The wireless station may modulate a plurality of symbols for the PPDU onto the set of tones of the first dRU. The wireless station may transmit the plurality of symbols via the first dRU.