Co-channel Utilization Estimation for Wireless Access Points
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Solution Overview
Problem
Conventional wireless access points struggle to accurately determine available bandwidth in shared frequency channels due to the processor-intensive nature of promiscuous mode, leading to under-admission of traffic streams and inefficient resource allocation.
Innovation Solution
The implementation of co-channel utilization estimation techniques, which calculate a utilization metric using impact values derived from severity and traffic utilization measures, allowing access points to estimate available bandwidth without operating in promiscuous mode, thereby facilitating accurate admission control for new traffic streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If access points operate in promiscuous mode to accurately measure channel utilization, then measurement precision is improved, but device complexity and processing requirements worsen
Solution Approach 1:
The patent introduces a controller as an intermediary device that performs the complex promiscuous mode operations and channel utilization measurements. The controller receives information from access points and clients, calculates channel utilization metrics, and provides this data back to access points. This mediator approach allows accurate measurements without requiring the access points themselves to operate in resource-intensive promiscuous mode.
Solution Approach 2:
The patent replaces the mechanical approach of having access points directly capture and analyze all radio frequency traffic (which requires intensive processing) with a computational approach. The controller performs centralized calculations using reported information from access points and clients, substituting distributed hardware-intensive processing with centralized software-based computation.
2Reliability
If access points use promiscuous mode for accurate bandwidth determination, then reliability of bandwidth allocation is improved, but productivity deteriorates due to under-admission of traffic streams
Solution Approach 1:
The controller acts as an intermediary that accurately determines channel utilization and provides this information to access points for admission control decisions. This allows access points to reliably assess available bandwidth without the processing overhead of promiscuous mode, enabling them to confidently admit more traffic streams while maintaining accurate bandwidth allocation.
Solution Approach 2:
The system performs preliminary channel utilization measurements and calculations through the controller before admission control decisions are made. By pre-calculating channel utilization metrics and making this information available to access points in advance, the system enables faster and more accurate admission decisions, improving traffic stream acceptance rates.
3Productivity
If access points accurately assess available bandwidth, then resource utilization is improved, but device complexity increases due to measurement requirements
Solution Approach 1:
The controller serves as a centralized measurement system that assesses channel utilization and provides this information to multiple access points. This intermediary approach allows all access points to benefit from accurate bandwidth assessment without each individual access point needing to implement complex measurement mechanisms, thereby improving resource utilization while minimizing per-device complexity.
Solution Approach 2:
The controller provides a universal measurement and calculation service that benefits multiple access points simultaneously. By centralizing the channel utilization assessment function, the system achieves accurate resource utilization metrics across the entire wireless network without duplicating measurement infrastructure at each access point.
Data Source
AI summary
Devices, methods and instructions encoded on computer readable media are provided herein for estimation of the available bandwidth in a frequency channel shared by a first access point and at least one neighboring access point. In one example, an impact value that represents the impact of traffic associated with the neighboring access point on the first access point is calculated. Based on the impact value, a first utilization metric associated with the first access point is generated. The first utilization metric represents the bandwidth available on the frequency channel in the presence of the traffic associated with the neighboring access point.