Wireless Frame SIG Field Trigger Cascade Indication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently supporting uplink multi-user transmission in dense environments with many access points and stations, particularly in improving spectrum efficiency and throughput in both indoor and outdoor settings.
Innovation Solution
A method and apparatus for transmitting frames in a wireless communication system that include a Legacy-Short Training Field (L-STF), a Legacy-Long Training Field (L-LTF), and a Signal (SIG) field, where the SIG field contains a Trigger indication and a Cascade indication to configure uplink multi-user data frames, allowing for seamless transmission using independent resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional wireless communication systems are used in dense environments with many access points and stations, then basic communication functionality is maintained, but spectrum efficiency and area throughput deteriorate
Solution Approach 1:
The patent segments the uplink transmission resource by introducing trigger frames that divide the medium access control layer into distinct phases: downlink transmission phase, trigger frame phase, and uplink multi-user transmission phase. This segmentation allows multiple stations to transmit simultaneously in different resource units, improving spectrum efficiency in dense environments while maintaining manageable system complexity through structured resource allocation
Solution Approach 2:
The patent introduces a new dimensional structure for frame transmission by adding trigger frames as an intermediate control layer between downlink and uplink transmissions. This dimensional addition enables the system to coordinate multi-user uplink transmissions efficiently, transforming the traditional sequential transmission model into a multi-dimensional resource allocation framework that improves throughput without proportionally increasing complexity
2Productivity
If multi-user transmission is implemented without proper frame structure, then throughput may increase, but transmission reliability and coordination deteriorate
Solution Approach 1:
The trigger frame performs preliminary actions by pre-configuring uplink transmission parameters before actual multi-user transmission occurs. It specifies resource units, modulation and coding schemes, and transmission timing for multiple stations in advance, ensuring reliable coordinated transmission while enabling high throughput through efficient resource utilization
Solution Approach 2:
The trigger frame mechanism establishes a feedback loop where the access point receives uplink transmission requests from multiple stations, processes resource allocation decisions, and sends back detailed transmission parameters in the trigger frame. This feedback mechanism ensures transmission reliability through proper coordination while maintaining high throughput through optimized resource allocation
Data Source
AI summary
Disclosed in the present invention are a method for transmitting a frame in a wireless communication system and a device therefor. Specifically, the method for transmitting a frame in a wireless communication system comprises a step in which a station (STA) transmits a frame comprising a legacy-short training field (L-STF), a legacy-long training field (L-LTF), and a signal (SIG) field, wherein the SIG field may comprise a trigger indication and a cascade indication, the trigger indication indicating whether the frame is a trigger frame comprising configuration information of an uplink multi-user (MU) data frame, and the cascade indication indicating whether the frame comprises a medium access control (MAC) frame.