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Intelligent Subscriber Monitoring

IP.com Disclosure Number: IPCOM000004585D
Original Publication Date: 2001-Feb-23
Included in the Prior Art Database: 2001-Feb-23
Document File: 1 page(s) / 27K

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Sanjay Choudhary: AUTHOR


Intelligent Subscriber Monitoring

This text was extracted from a WORD97 document.
This is the abbreviated version, containing approximately 100% of the total text.

Intelligent Subscriber Monitoring

by Sanjay Choudhary


A mobile telephone normally goes out of the network coverage because of two reasons. The first reason is when the mobile telephone is switched OFF The second reason is when the Radio Frequency (RF) signal level drops below a specified minimum threshold level. During this out of network condition, the mobile telephone will not receive any incoming calls. A calling party has to therefore continuously re-try to communicate with the mobile telephone until it becomes operative by returning from being out of network coverage. Unfortunately, there is no automatic indication given to either of the parties, when the mobile telephone comes back into the network coverage.


When a called mobile telephone is unavailable (out of network coverage), the calling telephone sends a SMS message to the called mobile telephone. As the called mobile telephone is not available, the message will be stored in an SMS Service Center. Due to the pending message, the Service Center will monitor the HLR (Home Location Register). As soon as the called mobile telephone becomes operative by returning from being out of network coverage, it will get registered in the HLR, and the Service Center will transmit the SMS message to the called mobile telephone and an acknowledgment message to the calling mobile telephone. The calling mobile telephone will then compare the SMS message identifier of the acknowledgment and if it matches with the transmitted SMS message the calling party will be automatically notified so that he/she can initiate a call.

With this feature, the caller need not spent time and network resources in repeated attempts to call a telephone that is out of the network coverage. This will result in value added service to the user and better utilization of the network resources.