EHT Padding and Packet Extension for 802.11be Throughput
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Solution Overview
Problem
Existing wireless communication standards, such as IEEE 802.11ax, face challenges in supporting higher data rates and improved transmission efficiencies due to difficulties in balancing increased data signaling with overhead and processing costs, particularly with the introduction of features like multiple resource units, higher modulation orders, and wider bandwidths in the emerging 802.11be standard.
Innovation Solution
The implementation of expanded NSD and NSD,short values, along with a new padding and packet extension procedure, allows for flexible pre-FEC padding and longer packet extensions, enabling efficient encoding and transmission of EHT data frames that accommodate wider bandwidths and multiple resource unit assignments, ensuring compatibility with both existing and new standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher data rates and improved transmission efficiencies are implemented through multiple-RU support, increased modulating order, signaling bandwidth, and number of spatial streams, then data throughput is improved, but overhead, processing costs, and timing requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and signaling the packet extension value in the preamble of the transmitted frame. This allows the receiving device to know in advance how much additional processing time will be required, enabling it to prepare appropriate buffer resources and processing schedules before the actual data arrival, thus managing the increased processing complexity of higher data rates without adding real-time overhead
Solution Approach 2:
The patent implements dynamics by making the packet extension value configurable and adaptable to different transmission conditions. The system can adjust the packet extension duration based on the specific requirements of multiple-RU support, modulation order, and spatial stream configurations, allowing the processing time to dynamically match the actual data complexity rather than using a fixed value
2Ease of manufacture
If existing encoding schemes are used with new features like multiple resource units and higher modulation orders, then implementation simplicity is maintained, but support for higher data rates and improved transmission efficiencies is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the encoding scheme parameters to accommodate new features. Specifically, it introduces a configurable packet extension value that can be adjusted based on the modulation order, resource unit configuration, and spatial stream count. This allows the system to maintain the familiar encoding structure while adapting parameters to achieve higher data rates and improved transmission efficiencies
3Reliability
If packet extension duration is increased to provide more processing time for receivers, then transmission reliability is improved, but transmission time and overhead increase
Solution Approach 1:
The patent implements dynamics by making the packet extension duration adaptable rather than fixed. The system can dynamically adjust the extension value based on the actual processing requirements of different frame configurations (multiple-RU, modulation order, spatial streams), providing sufficient processing time for complex transmissions while minimizing unnecessary extensions for simpler frames, thus balancing reliability with time efficiency
Solution Approach 2:
The patent applies parameter changes by introducing a configurable packet extension parameter that can be optimized for different transmission scenarios. This allows the system to change the processing time parameter to match the complexity of the transmitted data, ensuring reliable reception without consistently adding excessive time overhead
Data Source
AI summary
In an 802.11be wireless system, data units are generated for transmission by configuring a transmitting device to process encoding parameters, including a first encoding parameter NSD and a second encoding parameter NSD,short, to select a padding boundary from pre-defined padding boundaries in the last symbol that will most closely include the number of information bits NEXCESS in the last symbol and to append padding bits to the number of information bits NEXCESS to fill up to the selected padding boundary in the last symbol, thereby generating pre-encoded data bits which are encoded for data transmission, where at least the first encoding parameter NSD is specified for an aggregated resource unit size that is allowed under the 802.11be protocol as a sum of NSD values for at two other resource units.