System and method for rapid selection of synchronization sources in a mobile telecommunications network

• US 5,594,739 A
• Filed: 11/01/1995
• Issued: 01/14/1997
• Est. Priority Date: 11/01/1995
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Lemieux, Yves
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Nguyen, Chau T.
• Application Number:
  US08/548,336
• Time in Patent Office: 440 Days
• Field of Search: 370/79, 370/68.1, 370/103, 370/100.1, 370/150.1, 370/105.2, 370/105.4, 370/105.5, 370/95.1, 370/95.3, 379/59, 379/60, 379/63, 379/114, 379/115, 375/356, 455/51.1, 455/54.1, 455/54.2, 455/33.1, 395/550, 395/200.19
• US Class Current: 370/350
• CPC Class Codes: H04J 3/0641 Change of the master or reference, e.g. take-over or failure of the master
• CPC Class Codes: H04J 3/0647 Synchronisation among TDM nodes
• CPC Class Codes: H04J 3/0652 Synchronisation among time division multiple access [TDMA] nodes, e.g. time triggered protocol [TTP] bus network with centralized control in which slots are of a TDMA packet structure H04L12/4035
• CPC Class Codes: H04M 15/00 Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
• CPC Class Codes: H04M 15/43 Billing software details
• CPC Class Codes: H04M 15/745 Customizing according to wishes of subscriber, e.g. friends or family
• CPC Class Codes: H04M 15/8083 involving reduced rates or discounts, e.g. time-of-day reductions or volume discounts
• CPC Class Codes: H04M 15/83 Notification aspects
• CPC Class Codes: H04M 2203/554 Data synchronization
• CPC Class Codes: H04M 3/42382 Text-based messaging services in telephone networks such as PSTN/ISDN, e.g. User-to-User Signalling or Short Message Service for fixed networks
• CPC Class Codes: H04W 4/14 Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]

Abstract

A network management system and method in a telecommunications network for selectively accessing a plurality of synchronization sources of varying levels of accuracy, availability, and cost, and for enabling individual subscribers to select which synchronization source they utilize for each service application. Alternatively, the network management system may dynamically provide each subscriber with the least expensive synchronization source having the required level of accuracy for the subscriber'"'"'s selected application.

Claims

1. A network management system in a telecommunications network for selectively accessing a plurality of synchronization sources of varying levels of accuracy, availability, and cost, and for enabling an individual subscriber to select one of said plurality of synchronization sources for each telecommunication service application utilized by said subscriber, said system comprising:

means for informing said subscriber which of said plurality of synchronization sources are available for each of said service applications;

means for enabling said subscriber to select one of said plurality of synchronization sources for use with a service application;

a centralized transport synchronization module (CTSM) that interrogates said plurality of synchronization sources and selectively connects said sources to said telecommunications network; and

means for informing said CTSM which of said plurality of synchronization sources is selected by said subscriber.

2. The network management system of claim 1 wherein said network management system further comprises:

means for determining a different billing rate applicable to each of said plurality of synchronization sources; and

means for applying said determined billing rate to a call.

3. The network management system of claim 1 wherein said means for informing said subscriber which of said plurality of synchronization sources are available for each of said service applications includes means for sending a short message service (SMS) message from said CTSM to a mobile station utilized by said subscriber, said SMS message identifying which of said plurality of synchronization sources are available for each of said service applications.

4. The network management system of claim 3 wherein said means for enabling said subscriber to select one of said plurality of synchronization sources for use with a service application includes:

a mobile station; and

means for sending an acknowledgement message from said mobile station to said CTSM when said SMS message identifies a synchronization source which is the subscriber'"'"'s selected source.

5. The network management system of claim 1 wherein said CTSM includes:

means for interrogating each of said plurality of synchronization sources for information about each source'"'"'s accuracy and availability;

means for mapping the subscriber'"'"'s service applications with available synchronization sources; and

means for selectively connecting said synchronization sources to said telecommunications network.

6. The network management system of claim 5 wherein said CTSM also includes means for validating the service applications of said subscriber by reading said service applications from a home location register (HLR) associated with said subscriber.

7. The network management system of claim 6 wherein said means for mapping the subscriber'"'"'s service applications with available synchronization sources also includes means for mapping the subscriber'"'"'s service applications with billing rates associated with said synchronization sources.

8. The network management system of claim 7 wherein said means for informing said subscriber which of said plurality of synchronization sources are available for each of said service applications includes means for informing said subscriber of the billing rates associated with said available synchronization sources.

9. In a telecommunications network, a method of selectively accessing a plurality of synchronization sources of varying levels of accuracy, availability, and cost, and for enabling an individual subscriber to select one of said plurality of synchronization sources for each telecommunication service application utilized by said subscriber, said method comprising the steps of:

interrogating said plurality of synchronization sources with a centralized transport synchronization module (CTSM) to determine each source'"'"'s accuracy and availability;

informing said subscriber which of said plurality of synchronization sources are available for each of said service applications;

enabling said subscriber to select one of said plurality of synchronization sources for use with a service application;

informing said CTSM which of said plurality of synchronization sources is selected by said subscriber; and

connecting said selected source to said telecommunications network.

10. The method of claim 9 further comprising the steps of:

determining a different billing rate applicable to each of said plurality of synchronization sources;

informing said subscriber of the billing rates for each of said synchronization sources; and

applying the billing rate applicable to the synchronization source selected by said subscriber to a call.

11. The method of claim 9 wherein said step of informing said subscriber which of said plurality of synchronization sources are available for each of said service applications includes sending a short message service (SMS) message from said CTSM to a mobile station utilized by said subscriber, said SMS message identifying which of said plurality of synchronization sources are available for each of said service applications.

12. The method of claim 11 wherein said subscriber interfaces with said telecommunications network with a mobile station, and said step of enabling said subscriber to select one of said plurality of synchronization sources for use with a service application includes sending an acknowledgement message from said mobile station to said CTSM when said SMS message identifies a synchronization source which is the subscriber'"'"'s selected source.

13. The method of claim 9 further comprising, after interrogating said plurality of synchronization sources to determine each source'"'"'s accuracy and availability, the step of validating the service applications of said subscriber by reading said service applications from a home location register (HLR) associated with said subscriber.

14. The method of claim 13 further comprising, after validating the service applications of said subscriber, the step of mapping the subscriber'"'"'s service applications with available synchronization sources.

15. The method of claim 14 wherein said step of mapping the subscriber'"'"'s service applications with available synchronization sources also includes mapping the subscriber'"'"'s service applications with billing rates associated with said synchronization sources.

16. The method of claim 15 wherein said step of informing said subscriber which of said plurality of synchronization sources are available for each of said service applications includes informing said subscriber of the billing rates associated with said available synchronization sources.

17. A network management system for supervising proper frame and time slot synchronization between radio base stations and mobile stations in a mobile telecommunications network, said system comprising:

means for interrogating a plurality of synchronization sources to determine each source'"'"'s level of accuracy, availability, and cost;

means for enabling an individual subscriber to select a service application from a plurality of service applications;

means for determining minimum synchronization requirements for the selected service application;

means for determining which of said plurality of synchronization sources meet the minimum synchronization requirements for the selected service application;

means for informing said subscriber which of said plurality of synchronization sources are available and meet the minimum synchronization requirements for the selected service application;

means for enabling said subscriber to select one of said available synchronization sources that meet the minimum synchronization requirements for the selected service application; and

means for connecting said selected synchronization source to said telecommunications network.

18. The system of claim 17 further comprising means for determining a billing rate associated with each of said plurality of synchronization sources.

19. The system of claim 18 further comprising means for informing said subscriber of the billing rate associated with each of said available synchronization sources that meet the minimum synchronization requirements for the selected service application.

20. A method of supervising proper frame and time slot synchronization between radio base stations and mobile stations in a mobile telecommunications network, said method comprising the steps of:

interrogating a plurality of synchronization sources to determine each source'"'"'s level of accuracy, availability, and cost;

enabling an individual subscriber to select a service application from a plurality of service applications;

determining minimum synchronization requirements for the selected service application;

determining which of said plurality of synchronization sources meet the minimum synchronization requirements for the selected service application;

informing said subscriber which of said plurality of synchronization sources are available and meet the minimum synchronization requirements for the selected service application;

enabling said subscriber to select one of said available synchronization sources that meet the minimum synchronization requirements for the selected service application; and

connecting said selected synchronization source to said telecommunications network.

21. The method of claim 20 further comprising, after determining which of said plurality of synchronization sources meet the minimum synchronization requirements for the selected service application, the step of determining a billing rate associated with each synchronization source that meets the minimum synchronization requirements for the selected service application.

22. The method of claim 21 further comprising, after informing said subscriber which of said plurality of synchronization sources are available and meet the minimum synchronization requirements for the selected service application, informing said subscriber of the billing rate associated with each of said available synchronization sources that meet the minimum synchronization requirements for the selected service application.

23. A network management system for supervising proper frame and time slot synchronization between radio base stations and mobile stations in a mobile telecommunications network, said system comprising:

means for interrogating a plurality of synchronization sources to determine each source'"'"'s level of accuracy, availability, and cost;

means for enabling an individual subscriber to select a service application from a plurality of service applications;

means for determining minimum synchronization requirements for the selected service application;

means for determining which of said plurality of synchronization sources meet the minimum synchronization requirements for the selected service application;

means for determining a billing rate associated with each synchronization source meeting the minimum synchronization requirements for the selected service application;

means for automatically selecting a synchronization source having the lowest billing rate of said available synchronization sources that meet the minimum synchronization requirements for the selected service application; and

means for connecting said selected synchronization source to said telecommunications network.

24. A method of supervising proper frame and time slot synchronization between radio base stations and mobile stations in a mobile telecommunications network, said method comprising the steps of:

interrogating a plurality of synchronization sources to determine each source'"'"'s level of accuracy, availability, and cost;

enabling an individual subscriber to select a service application from a plurality of service applications;

determining minimum synchronization requirements for the selected service application;

determining which of said plurality of synchronization sources meet the minimum synchronization requirements for the selected service application;

determining a billing rate associated with each synchronization source meeting the minimum synchronization requirements for the selected service application;

automatically selecting a synchronization source having the lowest billing rate of said available synchronization sources that meet the minimum synchronization requirements for the selected service application; and

connecting said selected synchronization source to said telecommunications network.