Trigger Frame for Distributed Resource Units in 6 GHz
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently transmitting data within the power spectrum density (PSD) limits set by regulations, particularly in the 6 GHz frequency band, where the need to distribute resource units (RUs) over a larger bandwidth to maintain peak power transmission is not adequately addressed.
Innovation Solution
The implementation of a trigger frame mechanism that solicits the transmission of distributed resource units (dRUs) by indicating whether a regular RU or a distributed RU is required, along with spreading information to specify the bandwidth over which the tones of the dRU are spread, allowing for efficient power management and extended transmission range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contiguous tones are used for regular RU, then bandwidth is narrow and transmission power is limited, but distributing tones over larger bandwidth increases PSD compliance and transmission range
Solution Approach 1:
The patent segments the RU tones into distributed configurations where tones are separated across multiple frequency subblocks rather than contiguous. This segmentation allows the system to spread the spectral energy over a larger bandwidth, complying with PSD limits while maintaining peak power transmission capability, thereby extending transmission range.
Solution Approach 2:
The trigger frame mechanism dynamically configures whether to use regular RU (contiguous tones) or distributed RU (separated tones) based on real-time transmission requirements. The system can switch between these modes and adjust the distribution pattern adaptively, providing dynamic flexibility in RU configuration without requiring complex fixed infrastructure.
2Power
If distributed RU is used to increase bandwidth and transmission power, then PSD limits are complied with, but signaling complexity increases
Solution Approach 1:
The trigger frame is designed to serve multiple functions: it signals not only the allocated RUs but also explicitly indicates whether distributed RU mode should be used and provides the necessary distribution pattern information. This multi-functional design consolidates what would otherwise require separate signaling mechanisms into a single frame structure, reducing overall signaling complexity despite the advanced RU mode.
Solution Approach 2:
The system changes parameters in the trigger frame (such as the RU type indicator and distribution pattern fields) to encode the distributed RU configuration. By using standardized parameter modifications within the existing trigger frame structure rather than creating entirely new signaling protocols, the patent achieves distributed RU functionality with minimal increase in signaling complexity.
3Length of stationary object
If tones are distributed over larger bandwidth, then transmission range is extended, but the original narrow band arrangement is lost
Solution Approach 1:
The patent transitions from a one-dimensional contiguous tone arrangement to a multi-dimensional distributed arrangement where tones are spread across multiple frequency subblocks. This dimensional expansion in the frequency domain allows the system to achieve extended transmission range while the trigger frame provides the mapping information to reconstruct the original data stream, effectively managing the complexity of the tone arrangement structure.
Data Source
AI summary
Wireless communications comprises generating a trigger frame which has a first set of bits which directly indicates a resource unit (RU) arranged as a distributed RU is solicited to be transmitted in an uplink direction in a first frequency block and a second set of bits which directly indicates for one or more second frequency subblocks a spreading bandwidth of tones of the distributed RU or whether a second frequency subblock is a punctured subchannel. An access point (AP) transmits the trigger frame in a downlink direction to a non-AP station. The non-AP station generates and transmits in the uplink direction a Physical Layer Protocol Data Unit (PPDU) to the AP station with data modulated on the tones of the distributed RU based on the first set of bits and the second set of bits of the trigger frame.