Dynamic Wake-up Frame Waiting Time for IEEE 802.11 ba
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Solution Overview
Problem
In IEEE 802.11ba standard communication systems, access points (APs) often retransmit Wake-up frames due to channel congestion, leading to unnecessary power consumption and resource usage, even if the terminal station has successfully received the frame.
Innovation Solution
A communication apparatus that decides a waiting time based on channel congestion to determine when to retransmit the Wake-up frame, preventing unnecessary retransmissions by adjusting the waiting time based on the congestion degree of the channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the AP uses a fixed waiting time to receive response signals, then the system is simple to implement, but unnecessary retransmissions occur when the channel is congested
Solution Approach 1:
The waiting time is changed from a fixed value to a dynamic value that adapts to channel conditions. The AP determines the waiting time based on channel congestion status, making the system flexible and adaptive rather than static, thereby reducing unnecessary retransmissions while maintaining implementation feasibility
Solution Approach 2:
The waiting time parameter is adjusted according to channel congestion conditions. When the channel is congested, the waiting time is extended to allow more time for response signals to be received, reducing the likelihood of unnecessary retransmissions and associated power consumption
2Loss of energy
If the AP extends the waiting time to account for channel congestion, then unnecessary retransmissions are reduced, but the time delay increases
Solution Approach 1:
The waiting time is dynamically adjusted based on real-time channel congestion assessment rather than being fixed or uniformly extended. This allows the system to minimize waiting time when the channel is clear (reducing time loss) while extending it only when necessary (reducing power consumption from unnecessary retransmissions)
Solution Approach 2:
The waiting time parameter is adaptively changed according to channel conditions. The AP evaluates channel congestion and sets the waiting time accordingly, optimizing the balance between time efficiency and energy conservation by avoiding both premature retransmissions and excessive waiting
3Reliability
If the AP retransmits the Wake-up frame upon timeout, then the system ensures reliable delivery, but unnecessary retransmissions waste channel resources when the STA successfully received the frame
Solution Approach 1:
The retransmission decision is made dynamic based on channel congestion assessment rather than being automatic upon timeout. The AP evaluates whether the timeout was caused by channel congestion or actual delivery failure, enabling intelligent retransmission decisions that maintain reliability while conserving channel resources
Solution Approach 2:
The waiting time parameter is adjusted according to channel congestion levels. When congestion is detected, the waiting time is extended before triggering retransmission, allowing the system to distinguish between timeouts caused by congestion (where retransmission is unnecessary) and those caused by actual delivery failures (where retransmission is needed), thus maintaining reliability while reducing resource waste
Data Source
AI summary
A communication apparatus operable to communicate with a terminal station capable of operating in a Doze state and Awake state in an IEEE 802.11 ba, decides, based on a congestion degree in a channel for communicating with the terminal station in the Awake state, a waiting time for waiting for a response to a Wake-up frame for causing the terminal station to transit from the Doze state to the Awake state from when the Wake-up frame is transmitted, transmits the Wake-up frame while the terminal station is in the Doze state, and retransmits the Wake-up frame when the waiting time has elapsed after the Wake-up frame is transmitted without receiving the response from the terminal station.