Segmented Wake-Up Frames for Wireless LAN Reliability
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Solution Overview
Problem
Wake-up frames in wireless local area networks have weak robustness due to their long length, leading to difficulties in correct reception and increased latency and network bandwidth consumption when retransmissions are required.
Innovation Solution
Segmenting wake-up signaling content into multiple wake-up frames, each carrying a portion of the signaling information, allows for shorter frame lengths, improved reception reliability, and timely waking of the main transceiver, even if one frame is not correctly received, while reducing network bandwidth usage by retransmitting only the missing signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the wake-up frame carries complete wake-up signaling content, then the signaling information is comprehensive, but the frame length becomes long and reception reliability deteriorates
Solution Approach 1:
The patent segments the wake-up signaling content into multiple wake-up frames for transmission. Each frame carries a portion of the signaling information rather than the complete set, which reduces individual frame length and improves reception reliability. The receiver reassembles the complete signaling information from multiple received frames.
2Loss of information
If the wake-up frame length is long, then the signaling content is complete, but transmission time increases and latency increases
Solution Approach 1:
By segmenting wake-up signaling into multiple shorter frames, the transmission time for each frame is reduced. Although multiple frames are transmitted, the overall latency is reduced because shorter frames can be transmitted and acknowledged more quickly, and the receiver can begin processing earlier upon receiving the first frame.
3Reliability
If the wake-up frame is retransmitted due to incorrect reception, then the signaling information can be delivered, but network bandwidth consumption increases
Solution Approach 1:
Segmenting wake-up signaling into multiple frames allows for more efficient error handling. If some frames are lost or corrupted, only those specific frames need retransmission rather than the entire wake-up signaling set. This reduces overall network bandwidth consumption compared to retransmitting a single long frame.
Solution Approach 2:
The patent implements a feedback mechanism where the receiver sends acknowledgment information back to the transmitter about which wake-up frames were successfully received. This allows the transmitter to retransmit only the missing or corrupted frames, optimizing network bandwidth usage.
Data Source
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AI summary
This application provides a frame transmission method, device, and system, and belongs to the wireless communications field. The method includes: sending, by a second device, n wake-up frames to a first device, where the n wake-up frames each carry segmented content of wake-up signaling, so that a wake-up receiver of the first device wakes up a main transceiver of the first device based on the n wake-up frames, and after being woken up, the main transceiver sends, to the second device, a response frame used to indicate whether the n wake-up frames are correctly received. In this application, content of the wake-up signaling is segmented. In this case, lengths of the n wake-up frames are all relatively short, so that the wake-up receiver is easier to correctly receive each wake-up frame, and when a wake-up frame of the n wake-up frames is not correctly received, the wake-up receiver can wake up the main transceiver based on a correctly received wake-up frame. In this way, the main transceiver can be woken up in time. This improves wake-up frame robustness.