High Throughput WLAN Frame Format Segmentation
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Solution Overview
Problem
Current wireless communication systems, such as those adhering to IEEE 802.11 standards, face limitations in accommodating higher data throughput rates while maintaining backward compatibility with existing equipment and supporting various wireless channel configurations.
Innovation Solution
A new frame format for high data throughput wireless local area networks is introduced, comprising a first preamble segment with a first and second training sequence, a high throughput channel indication, and a second preamble segment with a third training sequence, all within specific sets of subcarriers, allowing for variable length data segments to convey data efficiently across different channel configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a new frame format is introduced to support higher data throughput rates, then data throughput rate is improved, but compatibility with existing WLAN equipment deteriorates
Solution Approach 1:
The frame format is divided into multiple segments including a legacy preamble segment compatible with existing WLAN equipment and a new preamble segment for high throughput transmissions. This segmentation allows old and new devices to coexist on the same channel, with legacy devices processing only the legacy preamble while new devices can utilize the complete frame structure for higher data rates.
2Adaptability or versatility
If the frame format is extended to support multiple training sequences and channel indications, then adaptability to different channel configurations is improved, but frame structure complexity deteriorates
Solution Approach 1:
The frame format incorporates dynamic elements including multiple training sequences (short and long training sequences) and channel indication fields that can be selectively activated based on the transmission requirements. The high throughput channel indication bit dynamically signals whether the subsequent frame elements should be processed, allowing the system to adapt its complexity to the specific channel conditions and data rate requirements.
3Measurement precision
If multiple training sequences are included in the preamble, then measurement precision for channel estimation is improved, but frame length deteriorates
Solution Approach 1:
The frame format includes both short training sequences and long training sequences, where the short training sequences provide initial channel estimation for rapid synchronization, and the long training sequences provide more precise channel estimation when needed. The receiver can selectively process only the necessary training sequences based on channel conditions, avoiding the need to always process the complete set and thereby reducing effective frame processing time.
Data Source
AI summary
A frame format for high data throughput wireless local area network transmissions includes a first preamble segment, a second preamble segment, and a variable length data segment. The first preamble segment includes at least one training sequence and a high throughput channel indication. The second preamble segment includes a high data throughput training sequence when the high throughput channel indication is set and includes a null segment when the high data throughput training sequence is not set.