HEW Uplink Frame Type Determination for MU Transmission
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Solution Overview
Problem
Current High Efficiency WLAN (HEW) systems lack methods for protecting transmitted frames and determining the type of response frames, which hinders performance and user experience in dense environments with multiple access points and high-capacity services.
Innovation Solution
A method for transmitting and receiving uplink frames in HEW systems, where a station (STA) determines the type of frame based on information received from an access point (AP), allowing simultaneous transmission by multiple STAs when the type is multiple-user (MU), and includes a baseband processor, RF transceiver, and memory to manage frame types and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple STAs transmit uplink frames simultaneously in MU mode, then productivity and user experience are improved, but frame protection reliability deteriorates due to lack of specified protection methods in HEW
Solution Approach 1:
The AP performs preliminary actions by determining the type of uplink frame (SU or MU) before the actual transmission occurs, and notifies STAs in advance through downlink frames. This allows STAs to prepare appropriate protection mechanisms beforehand, ensuring reliable simultaneous transmission in MU mode while maintaining transmission efficiency.
Solution Approach 2:
The AP acts as an intermediary that coordinates between multiple STAs attempting simultaneous uplink transmission. By determining frame types and notifying STAs, the AP mediates the transmission process, enabling reliable MU transmission while maintaining high productivity.
2Productivity
If HEW supports high-capacity services and dense AP deployments, then productivity and service capacity are improved, but the system lacks specified methods for frame protection and response frame type determination
Solution Approach 1:
The system implements self-service through automated frame type determination and protection mechanisms. The AP automatically determines whether uplink frames are SU or MU type and notifies STAs, which then automatically apply appropriate protection methods without requiring complex manual configuration, thus supporting high service capacity while managing complexity.
Solution Approach 2:
The system changes parameters by introducing frame type classification (SU/MU) and associated protection parameters. This parameter-based approach allows the system to adapt to different transmission scenarios (single-user or multi-user) and support high-capacity services in dense environments through standardized parameter management rather than complex ad-hoc configurations.
3Reliability
If the AP notifies STAs of uplink frame types in advance, then transmission reliability is improved, but loss of time occurs during notification
Solution Approach 1:
The AP performs the frame type notification as a preliminary action within the downlink frame transmission phase, before the actual uplink transmission begins. This timing ensures that STAs receive the information in advance without requiring separate notification messages, thus improving transmission reliability while minimizing time loss.
Data Source
AI summary
The present disclosure relates to a method and apparatus for transmitting a response frame based on a type in a High Efficiency Wireless Local Area Network (WLAN) (HEW). According to an aspect, a method for transmitting an uplink frame by a station (STA) to an access point (AP) in a WLAN may be provided. The method may include receiving, from the AP, a downlink frame including information related to a type of the uplink frame, the type of the uplink frame including a single-user (SU) type and a multiple-user (MU) type; and transmitting, to the AP, the uplink frame having a type determined based on the information related to the type of the uplink frame, wherein, when the type of the uplink frame corresponds to the MU type, the uplink frame is simultaneously transmitted by a plurality of STAs including the STA and at least one other STA.