Trigger Frame Spatial Reuse Fields for Wireless LAN Throughput
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Solution Overview
Problem
Current wireless LAN technologies face limitations in supporting high-speed services for new multimedia applications, particularly in generating high-efficiency and extremely high-throughput physical layer protocol data units (PPDUs) efficiently across different formats and spatial reuse fields.
Innovation Solution
A method and device for transmitting a trigger-based physical layer protocol unit (PPDU) that includes a communication module and a processor to receive a trigger frame from an access point, identifying multiple spatial reuse fields, and generating a response frame based on the information from these fields, depending on the format of the trigger frame, to optimize spatial reuse and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple spatial reuse fields are included in trigger frames to support high-density wireless LAN environments, then spatial reuse efficiency and throughput are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The trigger frame is segmented into multiple spatial reuse fields (first spatial reuse field, second spatial reuse field, third spatial reuse field) that can be independently configured and transmitted. Each field contains spatial reuse information for different frequency bands or resource units, allowing the system to selectively enable spatial reuse in specific segments rather than uniformly across the entire spectrum, thus improving throughput while managing complexity.
Solution Approach 2:
The patent introduces spatial reuse fields as an additional dimension of information in the trigger frame structure. Instead of simply increasing data rate through higher modulation, the system adds spatial dimensionality by incorporating multiple spatial reuse fields that provide information about channel conditions, interference levels, and resource allocation across different spatial and frequency dimensions, enabling more efficient multi-user MIMO operations.
2Productivity
If multiple spatial reuse fields are transmitted in trigger frames to enable efficient multi-user MIMO, then communication efficiency is improved, but loss of information increases due to potential transmission errors in additional fields
Solution Approach 1:
The patent implements feedback mechanisms where receiving stations send acknowledgment frames in response to trigger frames containing multiple spatial reuse fields. The access point monitors the successful reception and interpretation of these fields through feedback from multiple stations, and can adjust the configuration of spatial reuse fields in subsequent trigger frames based on observed performance and error rates, thereby maintaining high communication efficiency while mitigating information loss.
Solution Approach 2:
The trigger frame structure includes redundant and alternative spatial reuse fields that can serve as backup information. If certain spatial reuse fields are corrupted during transmission, the receiving station can utilize information from other fields or default configurations to reconstruct the necessary spatial reuse parameters, providing a cushion against information loss before it critically impacts communication efficiency.
3Ease of operation
If a single signaling mechanism is used to enable multiple stations to transmit TB PPDUs, then ease of operation is improved, but device complexity increases due to format identification and field selection requirements
Solution Approach 1:
The patent employs dynamic field selection and format identification mechanisms where the structure and content of spatial reuse fields in trigger frames can be dynamically adjusted based on the number of stations, channel conditions, and service requirements. The access point can selectively include or exclude certain spatial reuse fields, and receiving stations dynamically identify and process only the relevant fields based on frame format indicators, making the system easier to operate while managing device complexity through adaptive behavior rather than static complex structures.
Data Source
AI summary
Disclosed is a method for transmitting or receiving a TB PPDU based on a trigger frame in a wireless communication system. A terminal receives a trigger frame from an access point (AP) and transmits a response frame in response to the trigger frame. The response frame may be generated on the basis of information obtained from a first plurality of spatial reuse fields or a second plurality of spatial reuse fields of the trigger frame according to a resource unit and/or a format of the response frame.