Communication Apparatus Trigger Frame Padding Optimization
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Solution Overview
Problem
In environments with multiple wireless terminals, the varying transmission preparation abilities lead to differing request times, resulting in inefficient use of the wireless medium due to excessive padding areas unless destination trigger frames are appropriately set.
Innovation Solution
A communication apparatus and method that obtain ability information from each terminal to determine necessary preparation time and select destinations for a trigger frame, adding padding only to ensure the preparation times of selected terminals, thereby minimizing the total padding area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a padding area is added to ensure preparation time for all terminals, then all terminals can start transmission simultaneously, but the wireless medium is wasted due to excessive padding area
Solution Approach 1:
The patent applies local quality by customizing the padding area for each terminal based on its individual preparation time capability. Terminals with longer preparation times receive larger padding areas, while terminals with shorter preparation times receive smaller padding areas. This allows each terminal to have the exact padding it needs without adding unnecessary padding for other terminals, thus ensuring synchronized transmission start while minimizing wireless medium waste.
2Productivity
If the access point transmits trigger frames to all terminals, then all terminals can transmit data, but unnecessary delay time occurs due to excessive padding area
Solution Approach 1:
The patent changes the padding area parameter dynamically for each terminal based on its preparation time capability. By adjusting the padding area size to match each terminal's specific needs, the system eliminates unnecessary delay time caused by excessive padding while ensuring all terminals can transmit data. This parameter customization allows the access point to maintain high productivity without incurring unnecessary time losses.
3Device complexity
If terminals with different preparation times are grouped together, then fewer trigger frames are needed, but excessive padding area is added
Solution Approach 1:
The patent applies local quality by assigning different padding area sizes to terminals within the same trigger frame group based on their individual preparation time capabilities. This allows terminals with different preparation times to be grouped together in fewer trigger frames while each terminal receives only the padding it actually needs, preventing excessive padding area addition while maintaining reduced trigger frame quantity.
Data Source
AI summary
A communication apparatus for transmitting, to a plurality of terminals, a trigger frame for executing uplink transmission: obtains, from each of the plurality of terminals, ability information indicating a preparation time necessary to start transmission after a resource unit; selects terminals as destinations of one trigger frame from the plurality of terminals; and transmits the trigger frame for the selected terminals by adding a padding area to ensure the preparation times of the selected terminals. The communication apparatus selects the terminals from the plurality of terminals based on the pieces of ability information so that a total sum of the added padding area becomes small.