Dynamic SSID Deployment for Emergency Voice Calls
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Solution Overview
Problem
Current WLAN technologies face challenges in supporting emergency service voice calls efficiently, particularly in terms of resource management and security, as they continuously broadcast dedicated emergency service SSIDs regardless of user need, leading to inefficiencies and potential security vulnerabilities.
Innovation Solution
The implementation of dynamic SSID deployment for emergency voice-over-WLAN calls, where a new SSID with emergency service capability is deployed only when an emergency call is requested, allowing for Unauthenticated Emergency Service Accessible (UESA) policies to be applied, thereby optimizing resource usage and enhancing security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated emergency service SSIDs are continuously broadcast on WLAN access points, then emergency service availability is ensured, but network resources are wasted and security vulnerabilities increase
Solution Approach 1:
The patent implements dynamic SSID deployment where emergency service SSIDs are not continuously broadcast but are created on-demand when emergency calls are detected. The system monitors for emergency call indicators (such as specific dialing patterns or emergency keywords) and only then deploys the necessary SSID infrastructure, transforming the static continuous broadcast model into a dynamic on-demand model that adapts to actual emergency needs.
Solution Approach 2:
The patent creates temporary SSID instances that exist only for the duration of emergency calls. Each emergency SSID is a short-lived object that is deployed, used for the emergency call duration, and then removed. This disposable approach eliminates the need for permanent dedicated emergency SSIDs, reducing ongoing network resource consumption while maintaining emergency service capability when needed.
2Ease of operation
If dedicated emergency service SSIDs are continuously broadcast, then emergency service accessibility is maintained, but security risks increase due to constant exposure
Solution Approach 1:
The patent applies preliminary anti-action by implementing security measures before emergency SSIDs are deployed. The system pre-configures security policies, authentication mechanisms, and access control rules that are activated only when an emergency call is detected. This preliminary preparation of defensive measures ensures that when emergency SSIDs are created, they are immediately protected, rather than being continuously exposed and requiring constant security management.
Solution Approach 2:
By creating temporary SSID instances only when emergencies occur, the patent minimizes the window of exposure to security risks. These short-lived SSIDs exist only for the duration of the emergency call and are immediately removed afterward, reducing the opportunity for security breaches compared to continuously broadcast emergency SSIDs that are perpetually accessible.
3Productivity
If emergency SSIDs are deployed on-demand, then network resource efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service mechanisms where the WLAN access point system automatically detects emergency call indicators, triggers SSID deployment, manages the emergency connection, and removes the SSID after the call without requiring manual intervention. The system monitors its own state, makes autonomous decisions about when emergency services are needed, and manages the entire lifecycle of emergency SSIDs, reducing the operational complexity despite the increased functional complexity.
Solution Approach 2:
The patent employs feedback mechanisms where the system continuously monitors for emergency call indicators (such as specific dialing patterns, keywords, or signaling patterns) and uses this feedback to trigger SSID deployment. The feedback loop includes detecting the emergency condition, deploying appropriate resources, monitoring the emergency call status, and removing resources when the emergency ends. This automated feedback-driven approach manages system complexity through structured monitoring and response protocols.
4Loss of energy
If dynamic SSID deployment is implemented, then unnecessary network congestion is reduced, but response time for emergency service setup increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring SSID templates, security policies, and network resource allocation rules before emergencies occur. The system maintains a repository of pre-approved emergency SSID configurations and access control policies that can be instantly instantiated when needed. This preliminary preparation eliminates the need to create emergency infrastructure from scratch during actual emergencies, significantly reducing setup time while maintaining resource efficiency.
Solution Approach 2:
The patent implements dynamic resource allocation where the system can rapidly scale emergency SSID deployment based on detected emergency conditions. When an emergency is detected, the system dynamically activates pre-configured templates and allocates network resources in real-time, ensuring quick service establishment. The dynamic nature allows the system to maintain low overhead during normal operation while providing rapid response capability when emergencies occur.
Data Source
AI summary
Methods and devices are disclosed for supporting emergency service calls using dynamic service set identifier (SSID) deployment in a wireless communication network. An access point may receive an emergency service call request from a user device. The access point may also send a message with information about the received emergency service call request to a wireless network manager, and determine whether determining whether to serve the emergency service call request based on a response message received from the wireless network manager. In response to determining to serve the emergency service call request, the access point may create a new service set identifier (SSID) with emergency service call capability.