Serving Gateway Presence Detection via Bearer Monitoring
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Solution Overview
Problem
Existing systems rely on timer expiration to detect when a mobile device has left the coverage area of a micro base station, which can lead to delayed updates in location information, and may require vendor-specific modifications to the Mobility Management Entity for accurate presence detection.
Innovation Solution
The serving gateway is enhanced to detect when a mobile device has moved away from a micro base station using macro signaling visibility, integrating with a location/presence server to send immediate notifications based on IMSI and network address matching, eliminating the need for Mobility Management Entity modifications and supporting multi-vendor environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If timer-based methods are used to detect mobile device departure from micro base station coverage, then implementation complexity is reduced, but location update timeliness deteriorates
Solution Approach 1:
The system implements feedback-based presence detection by monitoring bearers in real-time and immediately notifying the presence server when a mobile device attaches to or detaches from a micro base station. This continuous feedback mechanism eliminates timer-based delays by directly responding to actual network state changes, thereby improving location update timeliness while maintaining manageable implementation complexity through standardized protocols.
2Measurement precision
If Mobility Management Entity is modified for accurate presence detection, then detection accuracy is improved, but system complexity and vendor dependency increase
Solution Approach 1:
The invention introduces a presence server as an intermediary component that receives bearer information from the Mobility Management Entity and performs presence detection independently. This mediator architecture allows accurate presence detection without modifying the core MME functionality, maintaining system simplicity and avoiding vendor-specific modifications while achieving reliable detection through the presence server's bearer monitoring capabilities.
Solution Approach 2:
The presence server implements a universal presence detection mechanism that works across multiple vendor networks by utilizing standard bearer protocols. This multi-functional approach enables accurate presence detection without being tied to specific vendor implementations, reducing system complexity and enhancing interoperability while maintaining high detection accuracy through standardized network protocols.
3Area of stationary object
If micro base stations are deployed to extend network coverage, then service coverage area is improved, but location tracking complexity increases
Solution Approach 1:
The system segments the network into distinct macro and micro base station layers, each serving different coverage requirements. The presence server independently tracks presence information from both layers by monitoring bearers, allowing the network to provide granular location services without overwhelming complexity. This segmentation enables detailed location tracking while maintaining manageable system architecture through standardized bearer-based communication protocols.
Data Source
AI summary
A serving gateway updates location information for a mobile device based on information in an update bearer request. The serving gateway receives a first update bearer request for a mobile device. The first update bearer request includes a first address associated with a micro cellular service base station to which the mobile device is in communication. The micro cellular service base station is associated with a physical location. The serving gateway sends a location notification to a location server, indicating that the mobile device is physically near the micro cellular service base station. The serving gateway receives a second update bearer request for the mobile device including an address associated with a macro cellular service base station. The serving gateway sends another location notification to the location server indicating that the mobile device is no longer at the physical location of the micro cellular service base station.