Wireless Sleep Control Unit Predicts Latency to Reduce Power
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Solution Overview
Problem
In one-to-one communication systems, data retransmission continues even when the receiving side is capacity-constrained, preventing the transmission or receiving side from entering a sleep mode, thereby increasing power consumption.
Innovation Solution
A wireless receiving apparatus and transmitting apparatus are designed with a sleep control unit that generates a sleep frame based on predicted latency information, allowing the apparatuses to transition to a sleep state after acknowledging the sleep frame, reducing unnecessary retransmissions and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data retransmission continues when the receiving buffer is full, then data delivery reliability is maintained, but power consumption increases and the system cannot enter sleep mode
Solution Approach 1:
The receiving apparatus predicts future buffer full states in advance and proactively sends C-Sleep frames before the buffer actually becomes full. This preliminary action allows the transmitting apparatus to stop retransmission early and enter sleep mode, preventing unnecessary power consumption while still maintaining data delivery reliability when the buffer becomes available.
Solution Approach 2:
The system dynamically adjusts the retransmission behavior based on predicted buffer states. Instead of continuous retransmission or rigid stop conditions, the system uses predicted latency information to dynamically determine when to send C-Sleep frames, enabling flexible power management while maintaining reliability.
2Use of energy by moving object
If the system enters sleep mode to save power, then power consumption is reduced, but data retransmission cannot be performed when needed
Solution Approach 1:
The system uses feedback from the receiving apparatus about predicted buffer full states to control transmitting apparatus behavior. The receiving apparatus sends C-Sleep frames as feedback signals that inform the transmitting apparatus when it can safely enter sleep mode without compromising data delivery, thus maintaining reliability while enabling power savings.
Solution Approach 2:
By predicting buffer full states in advance and communicating this information through C-Sleep frames, the system prepares for future power-saving opportunities before they actually occur. This allows the transmitting apparatus to enter sleep mode at the right moment, balancing power savings with data retransmission capability.
3Reliability
If continuous monitoring is performed to ensure data delivery, then reliability is maintained, but the system cannot enter sleep mode
Solution Approach 1:
The patent extracts the continuous monitoring function from both transmitting and receiving apparatuses by introducing a one-way prediction mechanism. The receiving apparatus takes out the burden of continuous monitoring by predicting buffer states and sending C-Sleep frames, while the transmitting apparatus takes out the need for active monitoring by relying on these prediction signals, enabling both to enter sleep mode.
Solution Approach 2:
The receiving apparatus serves itself by predicting its own buffer full states and proactively informing the transmitting apparatus. This self-service approach eliminates the need for the transmitting apparatus to continuously monitor buffer status, reducing power consumption on both sides while maintaining data delivery reliability.
Data Source
AI summary
A wireless receiving apparatus includes a receiving unit, a buffer, a prediction unit, a sleep control unit, an access control unit, a generation unit and a transmitting unit. The receiving unit is configured to receive data to extract a payload data. The buffer is configured to generate a buffer-full signal if a payload data size is larger than a free area size. The prediction unit is configured to generate predicted latency. The sleep control unit is configured to generate sleep information based on the predicted latency. The access control unit is configured to generate a sleep-frame parameter including the sleep information. The generation unit is configured to generate a sleep-frame. The transmitting unit is configured to transmit the sleep-frame. The sleep control unit keeps the power supply in the sleep state for indicating the sleep information after receiving an acknowledgment of receiving of the sleep-frame.