Wireless Access Point Expedited Bandwidth Request for Emergency Services
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Solution Overview
Problem
Wireless local area networks (WLANs) face challenges in providing reliable emergency and expedited services due to bandwidth constraints, where existing admission control mechanisms continue to admit new Quality of Service (QoS) flows until bandwidth is fully utilized, leading to denial of subsequent requests.
Innovation Solution
Implementing a system that allows wireless access points to advertise QoS and expedited bandwidth services, enabling prioritized access for emergency services by preferentially accepting expedited bandwidth requests and reallocating bandwidth resources as needed, using a central controller to manage bandwidth allocation and apply policies for emergency calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If admission control continues to accept new QoS flows until bandwidth is fully utilized, then network resource utilization is maximized, but emergency service reliability deteriorates because subsequent requests are denied
Solution Approach 1:
The patent applies local quality by creating different admission control behaviors for different service types. Normal QoS flows are admitted based on available bandwidth, while emergency flows receive preferential treatment with guaranteed admission regardless of bandwidth availability. This localized differentiation resolves the contradiction by ensuring emergency services maintain high reliability while normal services continue to maximize resource utilization.
Solution Approach 2:
The patent implements preliminary action by reserving bandwidth resources in advance for emergency services before they are actually needed. The system pre-configures policy parameters that allow emergency flows to preempt normal flows when necessary, ensuring that emergency service reliability is maintained without permanently reducing overall network utilization for non-critical services.
2Productivity
If bandwidth is allocated to normal QoS flows first, then network efficiency is improved, but emergency service access worsens when bandwidth is exhausted
Solution Approach 1:
The patent applies dynamics by implementing a dynamic admission control mechanism that can switch between normal and emergency modes. The system continuously monitors bandwidth utilization and automatically activates emergency service prioritization when thresholds are exceeded, allowing the network to efficiently serve normal traffic during low-demand periods while ensuring emergency access during high-demand periods.
Solution Approach 2:
The patent uses parameter changes by modifying admission control parameters based on service type and network conditions. The system adjusts bandwidth allocation parameters, priority levels, and admission thresholds dynamically, allowing normal QoS flows to utilize bandwidth efficiently under normal conditions while enabling emergency flows to override these parameters when critical needs arise.
3Reliability
If preferential treatment for emergency requests is implemented, then emergency service reliability is improved, but network complexity increases due to additional policy management
Solution Approach 1:
The patent applies self-service by enabling the admission control system to automatically differentiate and prioritize emergency flows without requiring manual intervention. The system uses predefined policies and automatic detection mechanisms to identify emergency traffic patterns, allowing the network to self-manage the complexity of emergency prioritization while maintaining high reliability for critical services.
Solution Approach 2:
The patent introduces an intermediary policy management layer that sits between the admission control mechanism and the actual traffic flows. This intermediary layer handles the complexity of policy configuration, priority assignment, and bandwidth reservation, shielding the core admission control logic from complex policy management while ensuring reliable emergency service handling.
Data Source
AI summary
Methods, apparatuses, and systems directed to reliably providing emergency services to wireless clients. In one embodiment, a wireless client determines if an attempt to transmit an emergency message exists. If so, the wireless client determines if one or more wireless access points support expedited bandwidth capabilities. If so, the wireless client notifies one of the wireless access points that the wireless client has an expedited bandwidth request.