Wireless Frame Retransmission for QoS Under Delay Limits
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Solution Overview
Problem
Existing wireless communication systems face limitations in Quality-of-Service (QoS) due to message detection failures under poor communication conditions, leading to neglect of undetected messages beyond a maximum retransmission limit, constrained by delay requirements.
Innovation Solution
A wireless data transmission system that adds multiple copies of undetected messages to subsequent frames, determining the number of retransmission frames and copies based on QoS and delay requirements, employing frequency hopping, and ensuring independent decodability to enhance message detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the maximum number of retransmission frames is limited by delay requirements, then the delay requirement is met, but the Quality-of-Service (QoS) is limited due to message neglect after maximum retransmissions
Solution Approach 1:
The patent segments the retransmission process by dividing messages into different priority levels (first priority and second priority). High-priority messages receive additional retransmission opportunities beyond the standard maximum, while low-priority messages follow the conventional limit. This segmentation allows the system to improve QoS for critical messages without universally increasing delay constraints.
Solution Approach 2:
The patent applies local quality by providing differentiated treatment to different messages based on their priority. Instead of a uniform retransmission policy, the system dynamically adjusts the number of retransmission frames allocated to each message according to its importance, ensuring that critical messages receive enhanced reliability while maintaining overall system efficiency.
2Reliability
If multiple retransmission opportunities are provided to improve message detection, then the QoS is improved, but the system complexity increases
Solution Approach 1:
The patent implements dynamic retransmission management where the number of retransmission frames is not fixed but adapts based on message priority and detection status. The system dynamically allocates additional retransmission opportunities to high-priority messages that fail detection, allowing flexibility in managing reliability without requiring complex static configurations for all possible scenarios.
Solution Approach 2:
The patent employs feedback mechanisms where the receiver notifies the transmitter about undetected messages, and the transmitter responds by allocating additional retransmission frames based on message priority. This closed-loop feedback system enables intelligent retransmission management that improves reliability while keeping complexity manageable through demand-driven resource allocation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances communication link QoS by reducing dropped messages and meeting QoS requirements through strategic retransmission and copy distribution, improving reliability and efficiency.
Implementation Method 1
transmit one or more frames of data to a designated receiver of a destination device, each frame of the frames including one or more messages
Implementation Method 2
employing frequency hopping
Data Source
Figure 1~2
AI summary
A wireless data transmission system and method is disclosed. A given frame comprising a distinct message is transmitted to a designated receiver. Responsive to a failure of the designated receiver to detect the distinct message, one or more first copies of the distinct message are added to at least one first subsequent frame of one or more subsequent frames, subsequent to the given frame, designating the designated receiver. Moreover, one or more second copies of the distinct message are added to at least one second subsequent frame of the subsequent frames, wherein a first number of the first copies is different than a second number of the second copies. The first copies and the second copies are added to meet a Quality of Service (QoS) requirement for a communication link between the wireless data transmission system and the designated receiver and a delay requirement for the communication link.