Dynamic NAV Settings for Shared TXOP Scheduling
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Solution Overview
Problem
In wireless communication networks, particularly those adhering to IEEE 802.11 standards, there are challenges in setting optimal network allocation vectors (NAV) for shared transmit opportunities (TXOP) to meet varying traffic needs, which can lead to suppressed uplink traffic and user experience issues due to inappropriate NAV settings, especially in scenarios involving real-time applications like extended reality (XR) or gaming.
Innovation Solution
The proposed solution involves a signaling mechanism that allows stations to request specific NAV settings for shared TXOPs, enabling shorter durations for peer-to-peer communications and ensuring that stations outside the direct range of the shared TXOP can appropriately set their NAVs through additional frames, thereby preventing interruptions and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a long NAV duration is set for shared TXOP to protect transmissions, then transmission reliability is improved, but uplink traffic is suppressed and user experience deteriorates
Solution Approach 1:
The patent implements dynamic NAV duration adjustment based on traffic type. For real-time applications like XR and gaming, the system sets shorter NAV durations to allow continuous uplink traffic, while for other traffic types, longer NAV durations are used to ensure transmission reliability. This dynamic adaptation resolves the contradiction by making the NAV setting flexible rather than fixed.
Solution Approach 2:
The system changes the NAV duration parameter according to the specific traffic needs and application type. By modifying this key parameter dynamically, the system can optimize between reliability and productivity - setting shorter NAV for real-time traffic to maintain uplink flow while setting longer NAV for other traffic to ensure reliable delivery.
2Ease of operation
If NAV settings are optimized for specific traffic types, then user experience is improved, but system complexity increases due to multiple configuration scenarios
Solution Approach 1:
The patent implements self-service mechanisms where stations automatically determine their traffic type and select appropriate NAV durations without manual configuration. The system autonomously identifies real-time traffic (XR, gaming) and applies optimized NAV settings, eliminating the need for complex manual configuration while maintaining good user experience.
Solution Approach 2:
The system uses feedback from traffic classification to automatically adjust NAV settings. By monitoring the type of traffic being transmitted and providing feedback to the NAV duration selection logic, the system can automatically optimize user experience without requiring complex external configuration or intervention.
3Area of stationary object
If additional frames are used to set NAV for stations outside direct range, then coverage is improved, but transmission overhead increases
Solution Approach 1:
The patent uses preliminary action by setting the NAV duration in the initial trigger frame to cover the entire shared TXOP period. This preliminary NAV setting allows stations outside direct range to know in advance when they should defer transmissions, eliminating the need for additional frames while maintaining full coverage.
Solution Approach 2:
The trigger frame serves multiple functions: it initiates the shared TXOP, provides scheduling information to participating stations, and simultaneously sets the NAV for all stations including those outside direct range. This multi-functionality reduces the need for separate frames, thereby reducing overhead while maintaining comprehensive coverage.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for Transmit Opportunity (TXOP) Sharing (TXS) enhancements. In some cases, a wireless node may transmit a first frame that includes a request for a network allocation vector (NAV) setting associated with a shared transmission opportunity (TXOP), receive a second frame triggering the shared TXOP, and communicate, during the shared TXOP, with the NAV set in accordance with the request.