Wireless Interface TXOP Management for rTWT Latency
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Solution Overview
Problem
Existing wireless communication technologies face inefficiencies and performance restrictions during restricted Target Wake Time (rTWT) Service Periods (SPs), particularly due to unsupported restrictions by wireless devices involved in transmissions.
Innovation Solution
A device, system, and method are disclosed that involve a wireless network interface device configured to transmit a beacon indicating an rTWT SP, transmit frames prior to the wake period during an overlapping Transmission Opportunity (TXOP), and transmit low latency traffic during the wake period, with the TXOP either ending or continuing as necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a frame is transmitted during a TXOP that overlaps with the rTWT SP wake period, then transmission continuity is maintained, but transmission restrictions are not supported by wireless devices
Solution Approach 1:
The patent applies preliminary action by ending the TXOP at the beginning of the wake period when low latency traffic is not mapped to another link. This proactive termination prevents the device from attempting to transmit during a period when restrictions are not supported, thereby resolving the contradiction between maintaining transmission continuity and ensuring restriction support.
Solution Approach 2:
The patent applies dynamics by providing flexible TXOP management where the TXOP can be either ended or continued based on traffic mapping conditions. When low latency traffic is mapped to another link, the TXOP is continued through the wake period, allowing transmission continuity. When not mapped, the TXOP is ended at the wake period beginning, ensuring restriction support. This dynamic adaptation resolves the contradiction.
2Reliability
If the TXOP is ended at the beginning of the wake period, then restriction support is ensured, but transmission continuity is interrupted
Solution Approach 1:
The patent applies dynamics by making the TXOP termination decision conditional on traffic mapping. The system dynamically determines whether to end or continue the TXOP based on whether low latency traffic is mapped to another link, optimizing both restriction support and transmission efficiency for each specific scenario.
Solution Approach 2:
The patent applies parameter changes by modifying the TXOP duration parameter based on traffic mapping conditions. The TXOP is adjusted to either end at or continue through the wake period beginning, changing the time parameter to balance restriction support and transmission continuity requirements.
3Productivity
If the TXOP is continued through the wake period, then transmission continuity is maintained, but device performance is restricted
Solution Approach 1:
The patent applies parameter changes by conditionally extending the TXOP duration based on traffic mapping. When low latency traffic is mapped to another link, the system changes the TXOP parameter to continue through the wake period, maintaining transmission efficiency without performance restriction since the traffic is handled on a different link.
4Loss of time
If low latency traffic is transmitted during the wake period, then latency requirements are met, but transmission complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-determining the TXOP continuation or termination based on traffic mapping conditions before the wake period begins. This advance decision simplifies the transmission process during the wake period, reducing complexity while ensuring low latency traffic is transmitted at the appropriate time.
Data Source
AI summary
A device, a system, and a method for transmissions during a restricted Target Wake Time (rTWT) Service Period (SP) are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to transmit a beacon on a first link that indicates an rTWT SP for the first link, transmit a frame prior to a wake period of the rTWT SP, where the frame is transmitted during a first Transmission Opportunity (TXOP) that overlaps with the wake period, and transmit low latency traffic on the first link during the wake period, where the first TXOP that overlaps with the wake period is at least one of ended and continued.