Dual Mode Modem Controller Activates CDMA for E911 AGPS
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Solution Overview
Problem
Current broadband wireless communication systems lack defined standards for Assisted Global Positioning System (AGPS) during Enhanced 911 (E911) emergency services, particularly in dual mode Mobile Stations (MS) where one modem is inactivated to conserve power, preventing AGPS operation when only the broadband communication modem is active.
Innovation Solution
A system and method that includes a dual mode Mobile Station (MS) with a first and second communication modem, where the dual mode modem controller activates the second modem for AGPS operation when an E911 request is received, allowing AGPS functionality even when the CDMA modem is inactivated, by integrating with an authentication server and location server to access and provide location information across different communication networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the CDMA modem is inactivated to conserve power in a dual mode MS, then power consumption is reduced, but AGPS operation during E911 emergency service becomes impossible
Solution Approach 1:
The system performs preliminary detection of E911 emergency service requests and proactively activates the CDMA modem before AGPS operation is needed. The location server sends a detection message to the MS, which then activates the CDMA modem in advance, ensuring AGPS functionality is available when required for emergency services.
Solution Approach 2:
The system dynamically switches the state of the CDMA modem between active and inactive modes based on service requirements. The modem controller adjusts the operational state of the CDMA modem according to detected service types, making it active for E911 emergency services and inactive for normal operations to optimize power consumption.
2Reliability
If the CDMA modem is activated to enable AGPS operation, then AGPS functionality is available, but power consumption increases
Solution Approach 1:
Instead of keeping the CDMA modem continuously active, the system uses periodic detection of service requests to determine when activation is needed. The location server periodically sends detection messages, and the modem is activated only during these periodic check intervals when E911 services are detected, rather than maintaining continuous operation.
Solution Approach 2:
The dual mode MS autonomously detects E911 emergency service requests through its service detector and automatically activates the CDMA modem without requiring manual intervention. The system self-manages the modem activation based on detected service types, enabling AGPS operation only when genuinely needed for emergency services.
Data Source
AI summary
An apparatus and method for supporting an Assisted Global Positioning System (AGPS) during emergency service in a communication system are provided. The system includes a client, an integration location server, and a dual mode Mobile Station (MS). The client requests MS location information for emergency service. The integration location server receives MS access information and sends a location information request. The dual mode MS receives the location request, activates a second communication modem, and performs an AGPS operation with the integration location server.