Wireless Access Point TWT Scheduling for Low-Latency Packet Delivery
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Solution Overview
Problem
In wireless networks, data packets of low-delay services face packet loss due to timeout when they cannot be transmitted within the scheduled Target Wake Time (TWT) Service Period (SP), leading to a decrease in quality of service (QoS).
Innovation Solution
A wireless device instructs a wireless access point to schedule uplink data transmission within a TWT SP by transmitting a request frame with a TWT parameter, ensuring timely data packet transmission by confirming the TWT parameter in a response frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data packets are transmitted within a scheduled TWT service period, then timeliness of low-delay service is improved, but packet loss due to timeout occurs when transmitting opportunity is not obtained
Solution Approach 1:
The patent applies preliminary action by establishing TWT service periods in advance with predetermined wake times and durations. The wireless device and access point negotiate and confirm TWT parameters before actual data transmission, ensuring that transmission opportunities are pre-scheduled. This allows the device to wake up at the predetermined time and transmit data packets within the confirmed service period, avoiding timeout losses while maintaining timeliness for low-delay services
2Ease of operation
If TWT parameters are confirmed by the wireless access point, then data transmission scheduling is improved, but complexity of communication protocol increases
Solution Approach 1:
The patent applies segmentation by dividing the TWT parameter confirmation process into distinct message exchanges: a first message from the wireless device containing the TWT parameter, and a second message from the access point confirming the parameter. This structured segmentation of the negotiation process makes the protocol more manageable and easier to implement while maintaining effective scheduling capability
Solution Approach 2:
The patent implements feedback through the confirmation message exchanged between the wireless device and access point. The access point responds to the TWT parameter with a confirmation message that verifies the scheduled service period, creating a closed-loop feedback mechanism. This feedback ensures both parties have consistent understanding of the transmission schedule, improving ease of operation while keeping protocol complexity controlled through standardized message formats
Data Source
AI summary
A data transmission control method is performed by a computer device that is wirelessly connected to a wireless access point, and the method includes: transmitting, to the wireless access point, a request frame carrying a target wake time (TWT) parameter, the TWT parameter comprising an indicator parameter for instructing the wireless access point to schedule the computer device to perform data transmission within a target wake time service period (TWT SP); receiving a response frame returned by the wireless access point; and transmitting, when the response frame indicates that the wireless access point confirms the TWT parameter, a data packet to the wireless access point within the TWT SP.