Wi-Fi Access Point Preemption Authorization for Low-Latency Traffic
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Solution Overview
Problem
Existing Wi-Fi technologies face challenges in providing granular and targeted preemption authorizations for low latency network traffic, particularly in environments with multiple access points, leading to interference and suboptimal network performance.
Innovation Solution
Implementing mechanisms for flow-based, traffic type-based, and device-specific preemption authorizations, using Stream Classification Service (SCS) frames and preemption policies to manage network traffic more effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If preemption is enabled for all traffic flows, then low latency performance is improved, but network interference and collisions increase
Solution Approach 1:
The patent segments preemption authorization into different types (flow-based, traffic type-based, device-based) and applies them selectively to different traffic flows. This allows preemption to be enabled only where needed for low latency performance while remaining disabled for other traffic, thereby reducing unnecessary interference and collisions in the wireless network.
Solution Approach 2:
The patent implements local quality by providing differentiated preemption authorization policies for different traffic flows, devices, and locations. Each flow or device can have its own preemption settings based on its specific latency requirements, allowing optimal performance for critical flows while avoiding interference for non-critical traffic.
2Productivity
If granular preemption authorization is implemented, then network performance is improved, but system complexity increases
Solution Approach 1:
The patent implements a universal preemption authorization framework that can operate in multiple modes (flow-based, traffic type-based, device-based) within a single system. This multi-functional approach allows the system to provide granular control for high network performance while using a unified authorization mechanism that manages complexity through standardization rather than requiring separate complex systems for each control level.
3Object-generated harmful factors
If preemption is restricted to specific flows, then interference is reduced, but latency for unauthorized flows increases
Solution Approach 1:
The patent implements dynamic preemption authorization where the access point can adjust preemption settings in real-time based on network conditions and traffic requirements. This allows the system to dynamically enable preemption for flows that need low latency while maintaining restrictions that reduce interference, adapting the balance between these competing requirements as network conditions change.
Data Source
AI summary
Aspects of the present disclosure are directed to providing preemption authorizations to support transmission of low latency network traffic. In one example, a method includes receiving, at an access point, a message indicating parameters associated with network traffic to be exchanged between the access point and an end device; determining, by the access point, at least one type of preemption authorization for the network traffic based on the parameters, the at least one type of preemption authorization being one or more of a flow-based preemption authorization, traffic type-based preemption authorization, and an end device-based preemption authorization; and signaling, by the access point, the at least one type of preemption authorization to the end device.