Wireless LAN Frame Signaling for Collision-Reduced Multi-User Transmission
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Solution Overview
Problem
Existing wireless LAN technologies face challenges in providing high-efficiency and high-performance communication in high-density environments, with increased possibilities of data transmission collisions among multiple terminals and the need for efficient multi-user transmission.
Innovation Solution
A wireless communication method and terminal that generate frames with a first signal field indicating total bandwidth information and a second signal field providing resource allocation and user information, including identifier and stream details for each resource unit, to facilitate efficient multi-user transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless LAN technology supports more terminals and applications, then the system capacity and versatility are improved, but the possibility of data transmission collisions increases
Solution Approach 1:
The frequency band is divided into multiple resource units (RUs) that can be independently allocated to different terminals. This segmentation allows the access point to schedule transmissions for multiple users simultaneously without interference, improving system capacity while reducing collisions by assigning specific frequency segments to specific users.
Solution Approach 2:
The patent introduces multi-user MIMO (MU-MIMO) technology that adds spatial dimension to frequency division. By utilizing multiple antennas and spatial streams, the system can transmit data to multiple users simultaneously in different spatial directions, effectively increasing system capacity without increasing collision probability in the traditional sense.
2Productivity
If the frame structure includes detailed resource allocation and user information fields, then multi-user transmission efficiency is improved, but the frame complexity increases
Solution Approach 1:
The signal fields in the frame structure are designed to serve multiple functions. The resource allocation field not only indicates which resource units are used but also implicitly defines the transmission parameters for multiple users. This multi-functionality reduces the need for separate control fields, thereby limiting the increase in frame complexity while maintaining high multi-user transmission efficiency.
3Quantity of substance
If multiple resource units with different sizes are allocated in frequency band, then resource utilization is improved, but the scheduling complexity increases
Solution Approach 1:
The patent implements dynamic resource allocation where the access point can flexibly assign different sizes of resource units to different terminals based on their instantaneous channel conditions and data transmission requirements. This dynamic approach optimizes resource utilization by assigning larger RUs to users with better channels and smaller RUs to users with poorer channels, while the standardized RU size options (e.g., 26, 52, 106 subcarriers) keep the scheduling algorithm manageable.
Data Source
AI summary
The present invention relates to a signaling method of a wireless LAN frame for multi-user transmission, and to a wireless communication terminal, and a wireless communication method using the same.To this end, provided are a wireless communication terminal, including: a transceiver; and a processor, wherein the processor is configured to: generate a frame including a first signal field and a second signal field, wherein the first signal field includes a bandwidth field indicating total bandwidth information in which the frame is transmitted, and the second signal field includes a resource allocation field indicating arrangement information of resource unit(s) in a frequency band through which the frame is transmitted, and transmit, by the transceiver, the generated frame and a wireless communication method using the same.