Site-Wide Call Routing Using RF Site Affiliation History
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Solution Overview
Problem
Conventional converged wireless communication devices fail to support site-wide call functionality when operating over IP networks due to the lack of location information, which is often restricted by privacy laws and GPS limitations, preventing effective communication during emergencies.
Innovation Solution
A communication system that determines RF site affiliations for subscribers using an electronic processor, enabling site-wide calls by transmitting audio via an IP connection based on previous affiliations, even when devices switch to IP networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If converged devices operate over IP networks to maintain communication connectivity, then network coverage and accessibility are improved, but site-wide call functionality is lost due to lack of location information
Solution Approach 1:
The system performs preliminary actions by determining and storing RF site affiliations for subscribers before they disconnect from the RF network. When a subscriber later connects via IP network, the pre-stored affiliation information enables the system to identify which site-wide calls should be routed to that subscriber, eliminating the need for real-time location determination.
Solution Approach 2:
The patent creates a copy of the subscriber's RF site affiliation information and stores it in the gateway system before the subscriber disconnects from the RF network. This copied information is then used by the IP network gateway to route site-wide calls appropriately, allowing the subscriber to receive calls based on their historical RF network affiliation rather than requiring active RF connection or real-time GPS location.
2Reliability
If GPS tracking is used to determine site affiliation for IP-connected devices, then site-wide call functionality can be maintained, but privacy restrictions and GPS limitations prevent reliable operation
Solution Approach 1:
The patent extracts the essential information needed for site-wide call routing (RF site affiliation) from the complex location determination process. Instead of relying on GPS coordinates or continuous location tracking, the system extracts and stores the subscriber's RF site affiliation data that was already available during RF network operation. This extracted information is sufficient for routing purposes without requiring invasive GPS tracking or violating privacy restrictions.
3Adaptability or versatility
If the system stores and processes RF site affiliation data for all subscribers, then site-wide calls can be routed to IP-connected devices, but system complexity increases
Solution Approach 1:
The system implements self-service by automatically determining and storing RF site affiliation information for subscribers when they are connected to the RF network, without requiring manual configuration or complex real-time location analysis. The gateway automatically uses this pre-stored information to route site-wide calls to IP-connected subscribers, eliminating the need for complex algorithms to determine affiliation at call time.
Data Source
AI summary
Examples provide a communication system including an electronic processor communicatively connected to a plurality of radio frequency (RF) sites in an RF network. The electronic processor determines RF site affiliations for each of a plurality of subscribers in the RF network, and determines that a first subscriber has disconnected from the RF network and established an internet protocol (IP) connection to a gateway associated with the RF network. In response to determining that a radio device has initiated a site-wide call for a first RF site, the electronic processor determines, based on the RF site affiliations, whether the first subscriber was affiliated with the first RF site prior to disconnection from the RF network. In response to determining that the first subscriber was affiliated with the first RF site, the electronic processor transmits audio associated with the site-wide call to the first subscriber via the IP connection.