WLAN Receiver Address Fields for Multi-User Uplink Scheduling
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Solution Overview
Problem
Wireless local area network (WLAN) devices face performance degradation due to increased interference from neighboring devices, particularly in environments with access points and non-access point stations, and struggle to support diverse applications like video streaming and cloud access, requiring improved power consumption and performance, especially for battery-operated devices.
Innovation Solution
A method and system for transmitting downlink frames that elicit responses from multiple stations, utilizing a first and second address field, and allocating resources for uplink multi-user transmissions, enabling simultaneous reception of uplink frames by access points, with specific settings for different frame types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource allocation information is included in downlink frames for uplink multi-user transmissions, then uplink transmission efficiency is improved, but downlink frame overhead increases
Solution Approach 1:
The downlink frame structure is segmented into multiple address fields (first address field and second address field) with distinct functions. The first address field identifies the receiver for resource allocation, while the second address field identifies the actual data recipient. This segmentation allows efficient multi-user uplink scheduling without excessive overhead by clearly separating control information from data routing information.
2Device complexity
If the second address field is set to the value of the first address field for first type downlink frames, then frame processing complexity is reduced, but address field flexibility is limited
Solution Approach 1:
The relationship between the first and second address fields is made dynamic rather than static. For first type downlink frames, the second address field is set equal to the first address field (reducing complexity). For second type downlink frames, the second address field can be set to a different value providing flexibility. This dynamic configuration allows the system to adapt to different transmission scenarios while maintaining processing efficiency.
Data Source
AI summary
A method may include transmitting a downlink frame that is eliciting a response from a plurality of stations, the downlink frame including a first address field, receiving an uplink frame in response to the downlink frame, the uplink frame including a second address field, and receiving the uplink frame on a resource allocated by resource allocation information included in the downlink frame for an uplink multi-user transmission. The second address field is set to a value of the first address field when the downlink frame is of a first type or a value of an address associated with a station (STA) when the downlink frame is of a second type. The AP simultaneously receives uplink frames in response to the first type of downlink frame, where the AP simultaneously receives uplink data frames.