QoS Traffic Admission Control for Wireless Access Point Interference
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Solution Overview
Problem
In dense wireless network deployments, overlapping access points experience interference, leading to ambiguity in channel selection and sharing, which affects network throughput and quality of service, especially in multicast and broadcast applications.
Innovation Solution
A method for calculating the aggregate peak total traffic demand across overlapping access points, comparing it to a threshold, and managing channel selection and admission control to mitigate interference and optimize channel sharing, using QoS traffic load reports to facilitate efficient channel selection and sharing among overlapping wireless local area networks (WLANs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple access points share the same wireless channel in dense deployments, then network coverage and capacity are improved, but interference between access points increases and channel selection becomes ambiguous
Solution Approach 1:
The patent segments the wireless network into multiple independent QoS domains, each with its own traffic load calculations and admission control decisions. This allows different channel sharing strategies to be applied to different traffic types, reducing overall interference while maintaining high throughput for critical applications.
Solution Approach 2:
The patent changes the parameter representation from simple total traffic load to differentiated QoS traffic load reports that specify traffic characteristics, priorities, and admission requirements. This enables more precise interference management and channel selection decisions.
2Loss of information
If access points advertise total traffic load information to assist channel selection, then other access points can make informed channel decisions, but ambiguity arises about whether overlapping access points are included in the total load calculation
Solution Approach 1:
The patent segments traffic load information into distinct QoS categories and sources, clearly identifying which access points' traffic is included in each load report. This eliminates ambiguity about the composition of total traffic load information.
Solution Approach 2:
The patent introduces QoS traffic load reports as an intermediary information structure that mediates between individual access point traffic data and channel selection decisions. These reports provide structured, unambiguous information about traffic characteristics and origins.
3Reliability
If admission control is implemented to protect existing QoS traffic, then quality of service is maintained, but new traffic streams may be rejected even when channel capacity is available
Solution Approach 1:
The patent changes admission control from binary accept/reject decisions based on total load to parameter-based decisions that evaluate QoS requirements, traffic priorities, and available capacity separately. This allows more nuanced admission decisions that protect QoS while admitting compatible new traffic.
Solution Approach 2:
The patent implements dynamic admission control that adapts to current channel conditions and traffic patterns. Admission decisions are made in real-time based on current QoS traffic load reports, allowing the system to maximize throughput while maintaining QoS guarantees when conditions permit.
Data Source
AI summary
Described herein are a method and apparatus including calculating an aggregate peak total traffic demand for all overlapping access points in an interference range, comparing the aggregate peak total traffic demand to a threshold, rejecting a requested new quality of service traffic stream responsive to results of the comparison, calculating a peak total traffic demand for each overlapping access point in the interference range if the requested new quality of service traffic stream is admissible responsive to results of the comparison, comparing the peak total traffic demand for each overlapping access point in the interference range, if the requested new quality of service traffic stream is admissible, to the threshold and one of accepting the requested new quality of service traffic stream and rejecting the requested new quality of service traffic stream responsive to results of the second comparison.