Wireless TXOP Adjustment for Low-Latency Multi-Link Access
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Solution Overview
Problem
Existing wireless networks face challenges in managing transmission opportunity (TXOP) intervals, leading to significant delays and packet loss due to deferral of uplink channel access, especially in multi-link operations, which are critical for low-latency applications like augmented reality and robotics.
Innovation Solution
A station (STA) and access point (AP) in a wireless network can communicate to adjust TXOP duration through request and response frames, allowing for dynamic reduction of TXOP based on traffic type and channel access needs, enhancing channel access efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large TXOP is assigned to increase throughput for low latency traffic, then throughput is improved, but channel access delay increases and packet transmission reliability deteriorates
Solution Approach 1:
The patent applies dynamics by enabling dynamic TXOP adjustment based on real-time channel conditions and traffic requirements. The system transitions from static TXOP assignment to dynamic modification, allowing the TXOP duration to be adjusted upward or downward depending on current network state, thereby resolving the contradiction between throughput and access delay
Solution Approach 2:
The patent changes the parameter of TXOP duration dynamically based on channel conditions and traffic characteristics. By modifying this critical parameter in response to measured performance metrics, the system optimizes the balance between throughput and latency for different traffic types and network states
2Speed
If TXOP duration is reduced to decrease latency, then channel access speed is improved, but throughput decreases
Solution Approach 1:
The system dynamically adjusts TXOP duration based on real-time channel conditions, traffic type, and network state. Rather than using a fixed reduced TXOP, the system optimizes the duration dynamically, allowing it to be reduced when latency is critical and extended when throughput is the priority, thus resolving the contradiction between access speed and productivity
3Device complexity
If AP does not adjust TXOP interval, then system complexity is reduced, but adaptability to varying traffic demands deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where STAs report channel conditions and traffic requirements to the AP, which then adjusts TXOP intervals accordingly. This feedback loop enables the system to adapt to varying traffic demands while keeping the control logic relatively simple and distributed, resolving the contradiction between complexity and adaptability
Solution Approach 2:
The system enables STAs to autonomously monitor their own channel access conditions and initiate TXOP adjustments based on their traffic needs. This self-service approach reduces the burden on the AP and simplifies the overall system architecture while maintaining high adaptability to individual STA requirements
Data Source
AI summary
A station (STA) in a wireless network is described. The STA includes a memory and a processor coupled to the memory, the processor is to cause transmitting, to an access point (AP), a request frame that indicates a request to reduce a transmission opportunity (TXOP) duration and receiving, from the AP, a response frame that indicates acceptance of the request to reduce the TXOP duration. The processor is further to cause receiving, from the AP, a frame indicating a reduced TXOP duration, and transmitting, to the AP, one or more frames based on the reduced TXOP duration.