EHT WLAN Control Signaling for Preamble Puncturing
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Solution Overview
Problem
Current communication technologies for Extremely High Throughput (EHT) WLAN lack efficient control signaling support for preamble puncturing in physical layer protocol data units (PPDUs) transmitted to a single communication apparatus, which hinders spectral efficiency improvements over existing IEEE 802.11ax HE WLAN.
Innovation Solution
The implementation of communication apparatuses and methods that generate and process transmission signals with specific signal fields, where the second part of the signal field does not contain version-independent bits, enabling efficient control signaling and preamble puncturing for PPDUs transmitted to a single STA, thereby enhancing spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control signaling is designed with version-independent bits in the second part of the signal field to ensure backward compatibility, then compatibility with legacy devices is improved, but spectral efficiency deteriorates due to redundant signaling overhead
Solution Approach 1:
The first signal field is divided into a first part and a second part, where the first part contains version-independent bits for legacy compatibility and the second part contains version-dependent bits for EHT-specific control signaling. This segmentation allows different portions of the signal to serve different functions, resolving the contradiction between compatibility and efficiency.
Solution Approach 2:
Version-independent bits are extracted from the second part of the first signal field, leaving only version-dependent bits in that location. This extraction eliminates redundant signaling overhead while maintaining the necessary control functionality for EHT preamble puncturing, thereby improving spectral efficiency without compromising legacy device operation.
2Productivity
If the maximum channel bandwidth is increased from 160 MHz to 320 MHz to provide significant peak throughput increase, then data transmission capacity is improved, but control signaling complexity worsens due to larger signal fields requiring more bits
Solution Approach 1:
Different portions of the control signal are assigned different qualities: the first part maintains version-independent characteristics for universal compatibility, while the second part contains version-dependent bits optimized for EHT-specific high-bandwidth operations. This local differentiation allows the control signaling to efficiently support 320 MHz bandwidth without proportionally increasing overall complexity.
Data Source
AI summary
The present disclosure provides communication apparatus and communication method for control signaling. The communication apparatus comprises circuitry, which, in operation, generates a transmission signal comprising a first signal field which comprises a first part and a second part, each comprising an equal number of data bits, wherein the data bits of the second part of the first signal field does not comprise version independent bits; and a transmitter, which, in operation, transmit the generated transmission signal.