Access Point C-rTWT Coordination for Latency-Sensitive Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In unmanaged wireless communication networks, access points (APs) face challenges in coordinating target wake times to effectively serve latency-sensitive traffic, leading to increased interference and reduced reliability due to uncoordinated transmissions by neighboring APs.
Innovation Solution
APs employ coordinated restricted target wake time (C-rTWT) schedules through individually addressed management frames to negotiate and synchronize service periods, ensuring neighboring APs refrain from transmitting during designated latency-sensitive periods, thereby reducing interference and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If unmanaged wireless communication networks allow autonomous AP transmissions, then network flexibility and ease of operation are improved, but interference and collision increase leading to reduced reliability
Solution Approach 1:
APs exchange coordination information frames in advance to negotiate and establish C-rTWT schedules before actual data transmission begins. This preliminary coordination allows APs to pre-arrange service periods and refrain from transmitting during coordinated intervals, ensuring reliable latency-sensitive traffic delivery while maintaining autonomous operation.
2Productivity
If APs transmit during overlapping service periods, then channel utilization and productivity are improved, but interference increases causing packet loss and retransmissions
Solution Approach 1:
The patent implements periodic service periods structured around C-rTWT schedules, where APs alternate between transmitting and refraining from transmitting in a coordinated periodic manner. This allows channel utilization to be maximized during non-coordinated periods while ensuring interference-free transmission during coordinated service periods for latency-sensitive traffic.
Solution Approach 2:
The wireless medium is segmented into distinct service periods with different transmission permissions. During C-rTWT service periods, participating APs segment their transmissions to refrain from transmitting, while other APs may transmit during non-coordinated periods. This temporal segmentation reduces interference and collisions while maintaining overall channel utilization.
3Reliability
If APs coordinate service periods through management frames, then reliability for latency-sensitive traffic is improved, but device complexity and overhead increase
Solution Approach 1:
APs autonomously negotiate and establish C-rTWT schedules through self-service coordination without requiring external network management or centralized control. Each AP independently exchanges coordination information frames with other APs to establish mutual service period agreements, reducing the complexity burden on the overall system while maintaining high reliability for latency-sensitive traffic.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for access point (AP) transmission service period coordination. Some aspects more specifically relate to coordination between AP and stations (STAs) for latency-sensitive data transmissions. As part of coordination procedures, a first wireless device (such as a first AP) may transmit one or more first messages to one or more second wireless devices (other APs or STAs) to request that the one or more second wireless devices refrain from transmitting communications at the start of the one or more service periods, during the one or more service periods, or both. The one or more first messages also may indicate one or more channel access parameters for the one or more second wireless devices to apply during the one or more service periods. Therefore, the AP transmission service period coordination may enable enhanced communications between wireless devices during the one or more service periods.