TWT Service Period Termination via Uplink Traffic Indication
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Solution Overview
Problem
Current Target Wake Time (TWT) service period termination methods in wireless communication networks lead to increased latency and energy inefficiency, particularly in augmented and virtual reality applications, due to the inability of devices to accurately indicate readiness to terminate service periods, resulting in unnecessary active states and potential data loss.
Innovation Solution
A method where a non-Access Point (AP) device, such as a Station (STA), provides an indication of the End Of Uplink Traffic for the Service Period (EOT-SP) to an AP through a Buffer Status Report (BSR), allowing the AP to determine the presence or absence of uplink traffic and transmit a Service Period Termination Notification, enabling early termination of the TWT service period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices maintain active states throughout the entire TWT service period to ensure no data loss, then data reliability is improved, but energy consumption increases and latency increases
Solution Approach 1:
The patent applies preliminary action by having the non-AP device send an indication message before the service period ends to notify the AP that uplink traffic has ended. This allows the AP to proactively terminate the service period early rather than waiting for it to naturally expire, enabling both devices to enter sleep mode sooner and reduce energy consumption while maintaining data reliability.
2Reliability
If devices wait for the full TWT service period to complete before entering sleep mode to ensure no data loss, then data reliability is improved, but latency increases
Solution Approach 1:
The patent implements feedback by having the non-AP device provide real-time status information about uplink traffic to the AP through an indication message. This feedback loop allows the AP to make informed decisions about early service period termination, reducing latency by avoiding unnecessary waiting while ensuring data reliability through confirmed traffic status.
3Use of energy by moving object
If the AP terminates the service period early without accurate traffic status information, then energy consumption is reduced, but data loss may occur
Solution Approach 1:
The patent applies preliminary action by requiring the non-AP device to send an indication message before the service period ends, providing advance notice that uplink traffic has completed. This preliminary information allows the AP to confidently terminate the service period early without risking data loss, as it has been notified that no further uplink traffic is expected.
4Device complexity
If devices use traditional TWT termination methods without traffic status indication, then device complexity is reduced, but energy efficiency deteriorates
Solution Approach 1:
The patent applies self-service by having the non-AP device autonomously monitor its own uplink traffic status and send indication messages to the AP when traffic ends. This self-service approach enables early service period termination and improved energy efficiency without requiring complex centralized control or additional hardware, as each device manages its own traffic status reporting.
Data Source
AI summary
Systems, methods, and devices for indicating a target wake time (TWT) service period (SP) termination may include a first device which receives, from a second device, an indication for terminating a TWT SP. The first device may determine a status of downlink traffic for transmission to the second device. The first device may transmit, to the second device, an SP termination notification according to the status of the downlink traffic and the indication. The first device may terminate the TWT SP according to the SP termination notification.