Trigger Frame Resource Allocation for WLAN Spectrum Efficiency
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Solution Overview
Problem
Next-generation WLAN systems face challenges in improving spectrum efficiency and area throughput, especially in dense environments with many access points and stations, and in outdoor settings where existing WLANs perform poorly.
Innovation Solution
A method for transmitting frames in a WLAN system that includes a wireless terminal sending a trigger frame with identification information and resource allocation for user stations, using specific index ranges to indicate different channel sizes for uplink transmission, allowing for efficient resource utilization and improved performance in dense and outdoor environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing WLAN protocols 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 wireless medium into multiple resource units (RUs) that can be independently allocated to different user stations. This segmentation allows efficient spectrum utilization in dense environments by enabling multiple users to transmit simultaneously on different RUs, thereby improving spectrum efficiency while maintaining adaptability to various environmental conditions
Solution Approach 2:
The patent introduces a new dimension for resource allocation by defining multiple index ranges (first through seventh index ranges) that correspond to different RU sizes and configurations. This multi-dimensional indexing system enables flexible adaptation to dense environments while optimizing spectrum efficiency through precise resource control
2Productivity
If existing WLAN protocols are used in outdoor environments, then basic communication is possible, but performance deteriorates significantly
Solution Approach 1:
The patent implements dynamic resource allocation where the access point can flexibly assign different RU configurations based on channel conditions and user requirements. The trigger frame mechanism allows real-time adaptation of resource units, enabling the system to maintain reliable performance in outdoor environments while maximizing area throughput through optimized spectral utilization
3Ease of operation
If resource allocation is simplified for ease of operation, then system operation becomes easier, but spectrum efficiency and resource utilization deteriorate
Solution Approach 1:
The patent introduces a trigger frame as an intermediary mechanism that carries resource allocation information from the access point to user stations. This trigger frame uses standardized index ranges to concisely indicate RU allocations, making the system easy to operate while achieving high resource utilization efficiency through structured and systematic resource management
Data Source
AI summary
A method for transmitting a frame in a wireless LAN system according to an embodiment of the present specification comprises a step of transmitting, by a wireless terminal, a trigger frame including identification information for a plurality of user STAs and resource information indicating resource units separately allocated to the plurality of user STAs, wherein, when the trigger frame is an MU RTS frame, the resource information is configured: on the basis of first to fourth index values in a fourth index range in order to indicate a primary 20 MHz channel through which a CTS frame, a response to the MU RTS frame, is to be transmitted; on the basis of fifth and sixth index values in a fifth index range in order to indicate a primary 40 MHz channel through which the CTS frame is to be transmitted; and on the basis of a seventh index value in a sixth index range in order to indicate a primary 80 MHz channel through which the CTS frame is to be transmitted.