SIG Field Segmentation for Multi-Layer Transmission in Wireless LAN
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Solution Overview
Problem
Current wireless LAN systems face challenges in achieving high throughput, low latency, and ultra-high reliability, particularly in supporting multi-layer transmission (MLT) for efficient data processing and resource allocation.
Innovation Solution
The method involves designing a SIG field with a common field and a user field to configure and indicate MLT, allowing for the superposition and transmission of data for multiple stations, thereby increasing channel capacity and enabling signal transmission for more stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-layer transmission (MLT) is implemented to increase channel capacity and support more stations, then the quantity of data transmission and system throughput are improved, but the device complexity and signal processing requirements increase
Solution Approach 1:
The SIG field is segmented into a common field and a user field. The common field contains information applicable to all stations (such as resource allocation), while the user field contains station-specific information. This segmentation allows receiving stations to efficiently process only the relevant portions of the signal, reducing processing complexity while enabling MLT to support multiple stations simultaneously.
Solution Approach 2:
The patent introduces a new dimension in signal structure by adding a user field to the SIG field, which is specifically designed to carry multi-layer transmission information. This dimensional expansion of the signal structure enables the system to handle multiple layers of data transmission without significantly increasing the processing burden on individual stations, as each station can focus on decoding its specific user field information.
2Adaptability or versatility
If a SIG field with common field and user field is designed to configure MLT, then the adaptability and resource allocation efficiency are improved, but the device complexity and implementation difficulty increase
Solution Approach 1:
The SIG field is divided into a common field and a user field. The common field carries resource allocation information that applies to all stations, while the user field carries station-specific configuration information for MLT. This segmentation enables flexible resource allocation across multiple stations without requiring each station to process the entire SIG field, thereby improving adaptability while managing implementation complexity.
Solution Approach 2:
The common field in the SIG field serves a universal function by carrying resource allocation information that is applicable to all stations in the network. This universal component allows the system to efficiently allocate resources across multiple stations simultaneously, enhancing adaptability without requiring separate configuration mechanisms for each station, thus managing complexity through functional consolidation.
3Productivity
If data for multiple stations is superposed and transmitted to increase channel capacity, then the throughput and system performance are improved, but the measurement precision and data decoding difficulty increase
Solution Approach 1:
The SIG field is segmented into a common field and a user field, where the user field contains station-specific information that enables receiving stations to precisely identify and decode their own data within the superposed transmission. This segmentation maintains measurement precision by providing clear demarcation between different users' data, allowing accurate decoding despite the superposition of multiple data streams.
Solution Approach 2:
The SIG field acts as an intermediary that carries control information necessary for decoding the superposed data. By providing station-specific information in the user field, the SIG field mediates between the complex superposed signal and the receiving station's decoder, enabling accurate data recovery without directly transmitting the raw superposed data, thus maintaining decoding accuracy while achieving high throughput.
Data Source
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AI summary
Disclosed are a method and a device for carrying out multi-layer transmission (MLT) in a wireless LAN system. A method carried out by a first station (STA) in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: receiving, from a second STA, a physical layer protocol data unit (PPDU) including a SIG field associated with MLT; and processing MLT-based data by decoding the SIG field. Here, the SIG field includes information indicating whether to apply the MLT, and on the basis that the MLT is applied, a user field for a first STA included in the SIG field may include at least one subfield for processing the MLT-based data.