Multi-AP Protected Service Periods for WLAN Interference Control
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Solution Overview
Problem
Existing wireless local area network (WLAN) technologies face challenges in efficiently managing power consumption and reducing transmission interference in large-scale Internet of Things (IoT) environments, particularly when multiple access points (APs) are involved.
Innovation Solution
The proposed solution involves an operation method based on multiple APs, where a first AP device establishes a protected predetermined service period through multi-AP operation for a first station (STA) device, negotiated and established by the first AP device and at least one second AP device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single AP device manages TWT for STA devices, then the negotiation and establishment process is simple, but the protection range of frame exchanges is limited and transmission interference between STAs cannot be effectively mitigated
Solution Approach 1:
The patent combines multiple AP devices into a coordinated system where each AP establishes protected predetermined service periods for STA devices. The APs coordinate their TWT management to create overlapping protection ranges, effectively merging individual protection zones into a comprehensive coverage area that mitigates transmission interference across the entire network.
Solution Approach 2:
The patent extends TWT management from a single AP dimension to a multi-AP dimensional framework. By introducing coordination mechanisms between multiple APs, the system creates additional layers of protection in the time-domain scheduling, allowing STAs to receive coordinated protection across multiple APs simultaneously.
2Object-affected harmful factors
If multiple AP devices coordinate to establish protected predetermined service periods, then the protection range of frame exchanges is enlarged and transmission interference is mitigated, but the negotiation and establishment process becomes more complex
Solution Approach 1:
The patent implements feedback mechanisms where AP devices exchange information about their TWT schedules and protection ranges. This feedback loop enables coordinated adjustment of service periods to avoid conflicts and optimize protection coverage, reducing the complexity of multi-AP coordination through iterative negotiation.
Solution Approach 2:
The patent employs preliminary action by having AP devices pre-negotiate and pre-establish their protected predetermined service periods before actual data transmission occurs. This advance scheduling and coordination reduces real-time complexity and enables efficient multi-AP operation through pre-planned protection ranges.
3Productivity
If protected predetermined service periods are established for each STA device, then transmission efficiency is improved, but the overall system overhead increases
Solution Approach 1:
The patent creates a universal TWT management framework where the protected predetermined service period mechanism serves multiple functions simultaneously: it provides transmission protection, enables power saving coordination, and establishes scheduling priorities. This multi-functionality reduces the need for separate management mechanisms, thereby reducing overall system overhead.
Data Source
AI summary
Provided is an operation method based on multiple access points (APs), applicable to a first AP device. The method includes: transmitting a first frame to establish a protected predetermined service period based on a multi-AP operation for a first station (STA) device, wherein the protected predetermined service period based on the multi-AP operation is a protected predetermined service period negotiated and established by the first AP device and at least one second AP device.