WLAN Multi-RU Transmission with Punctured Channel Allocation
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Solution Overview
Problem
Existing wireless communication technologies cannot assign multiple resource units to a single wireless station, limiting spectral efficiency and network throughput when preamble puncturing is used, and do not effectively utilize frequency diversity.
Innovation Solution
Assign multiple resource units to a single wireless station, employing different encoding and transmission schemes based on RU size and number, allowing joint or independent encoding of PSDUs across these units to enhance spectral efficiency and frequency diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple resource units are assigned to a single wireless station, then spectral efficiency and network throughput are improved, but device complexity increases due to the need for joint or independent encoding of PSDUs across multiple units
Solution Approach 1:
The patent divides the resource units into different types (first resource units and second resource units) with different encoding requirements. First resource units use joint encoding while second resource units use independent encoding, allowing the system to manage complexity through segmentation while achieving high throughput by combining multiple units.
Solution Approach 2:
The patent dynamically selects encoding schemes based on the specific resource unit allocation. The encoder can switch between joint encoding for first resource units and independent encoding for second resource units, providing flexible adaptation to different transmission scenarios and optimizing the balance between complexity and throughput.
2Reliability
If multiple resource units are assigned to a single wireless station, then frequency diversity is enhanced, but the complexity of managing and decoding signals across multiple units increases
Solution Approach 1:
The patent segments the resource units into two categories with different decoding requirements. First resource units require joint decoding to exploit frequency diversity, while second resource units can be decoded independently. This segmentation allows the receiver to manage complexity while still benefiting from frequency diversity across the combined units.
Solution Approach 2:
Different parts of the transmission have different quality requirements. The patent applies joint encoding/decoding to first resource units where frequency diversity is most beneficial, while using independent encoding/decoding for second resource units, allowing localized optimization of diversity benefits without uniformly increasing complexity across all units.
3Productivity
If preamble puncturing is used to avoid interference, then spectral efficiency is improved, but the ability to assign multiple resource units to a single station is limited under existing protocols
Solution Approach 1:
The patent creates a universal resource unit assignment mechanism that works regardless of preamble puncturing. The access point can assign multiple resource units (whether contiguous or non-contiguous, whether affected by puncturing or not) to a single station using the same basic allocation framework, thereby maintaining spectral efficiency benefits while achieving assignment flexibility.
Solution Approach 2:
The patent dynamically adapts the resource unit assignment based on puncturing conditions. When preamble puncturing is detected, the system can still assign multiple resource units to a single station by dynamically adjusting the allocation strategy, thereby maintaining versatility and spectral efficiency despite the puncturing constraint.
Data Source
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AI summary
Embodiments of the present invention provide transmission schemes and methods that can assign multiple resource units, RUs, to a single wireless station using Aggregate Media Access Control Protocol Data Unit, A-MPDUs, in a flexible transmission scheme for the multi-RUs transmission. Embodiments of the present invention can send and receive data sing multiple resource units allocated to a single wireless STA. A 20 MHz segment and a 40 MHz segment on either side of a punctured portion of an 80 MHz segment can be treated as separate RUs, and the RUs can be assigned to the same wireless user/device. Each punctured 80 MHz segment can be interleaved separately. Different processes for encoding data and transmission schemes for transmitting the data are described herein according to embodiments of the present invention. Different transmission schemes can be used based on the size and number of the RUs allocated to an STA.