Method and system for managing signaling in a wireless communication network

• US 9,480,046 B1
• Filed: 06/11/2015
• Issued: 10/25/2016
• Est. Priority Date: 06/11/2015
• Status: Active Grant

• Current Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Mehta, Dhaval, Mirza, Abdul-Wahab, Chenumolu, Siddhartha
• Primary Examiner(s): Ajayi, Joel
• Application Number:
  US14/737,163
• Time in Patent Office: 502 Days
• Field of Search: 455/458
• US Class Current: 1/1
• CPC Class Codes: H04W 68/04 multi-step notification using statistical or historical mobility data
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

Disclosed is a method and system for managing signaling in a communication network. A paging controller determines one or more target coverage areas to attempt a paging request for a wireless communication device (WCD) based on (i) a coverage area last serving the WCD (“last known coverage area”) and (ii) an amount of time passed since the WCD last transitioned from a connected state to an idle state in the last known coverage area (“the idle duration”). The paging controller can utilize a database that specifies, on a per WCD basis, one or more records of associated data items for different last known coverage areas, idle durations, and target coverage areas. With knowledge of a last known coverage area and idle duration for a WCD, database record(s) can be identified and target coverage area(s) can be determined. A paging request can then be transmitted to the determined target coverage area(s).

Claims

1. A method of managing signaling in a radio access network (RAN), wherein the RAN includes a plurality of base stations each providing a respective coverage area in which to serve wireless communication devices (WCDs), and wherein the RAN includes a paging controller, the method comprising:

determining, in the paging controller, that a particular WCD should be paged;

responsive to the determination that the WCD should be paged, the paging controller determining a last known coverage area for the WCD, the last known coverage area being provided by a base station in the RAN with which the WCD was communicating when the WCD last transitioned to an idle mode;

responsive to the determination that the WCD should be paged, the paging controller determining an idle duration for the WCD, the idle duration being an amount of time that has passed since the WCD last transitioned to the idle state in the last known coverage area;

determining, by the paging controller, one or more target coverage areas based on the determined last known coverage area, the determined idle duration, and data regarding past activities of the WCD; and

transmitting a page request, from the paging controller to one or more base stations providing the one or more determined target coverage areas, to cause the one or more base stations to page the WCD.

2. The method according to claim 1, wherein the determining the one or more target coverage areas comprises:

accessing a database including a plurality of records associated with the WCD, each record including an indication of a respective one of a plurality of last known coverage areas, an indication of a respective one of a plurality of idle durations, and an indication of a respective one of a plurality of target coverage areas; and

identifying one or more of the plurality of records based on the determined last known coverage area and the determined idle duration, the determined one or more target coverage areas being determined from the identified one or more records.

3. The method according to claim 2, wherein the identifying the one or more records comprises determining which of the plurality of records each contains (i) an indication of last known coverage area that matches the determined last known coverage area and (ii) an indication of idle duration that approximates the determined idle duration.

4. The method according to claim 3, wherein the determining which of the plurality of records contains the indication of idle duration that approximates the determined idle duration comprises determining which indications of idle duration are within a tolerance range of the determined idle duration.

5. The method according to claim 4, further comprising:

responsive to transmitting the page request, determining if the WCD was successfully paged by the one or more base stations providing the determined one or more target coverage areas; and

responsive to a determination that the WCD was not successfully paged, determining an updated idle duration based on an updated clock time, determining one or more additional target coverage areas based on the last known coverage area and the updated idle duration, and transmitting the page request to the one or more additional target coverage areas, the updated clock time being based on an amount of time that has passed since the idle duration was last determined.

6. The method according to claim 5, further comprising increasing the tolerance range after each unsuccessful paging attempt.

7. The method according to claim 2, wherein the plurality of records is based on the data regarding the past activities of the WCD.

8. The method according to claim 2, wherein the database is stored by another entity in RAN, and the determining the last known coverage area includes requesting the last known coverage area from the other entity in the RAN.

9. The method according to claim 1, wherein the database is stored in a data storage of the paging controller.

10. The method according to claim 1, further comprising transmitting the page request to the base station providing the last known coverage area prior to determining the one or more target coverage areas.

11. The method according to claim 1, wherein the paging controller is a mobility management entity (MME) and the RAN is an Orthogonal Frequency Division Multiple Access (OFDMA) network.

19. The paging controller according to claim 1, wherein the paging controller is a mobility management entity (MME) and the RAN is an Orthogonal Frequency Division Multiple Access (OFDMA) network.

12. A paging controller, comprising:

a processing unit;

a data storage; and

program instructions stored in the data storage and executable by the processing unit to;

(i) determine that a particular wireless communication device (WCD) in a radio access network (RAN) should be paged,

(ii) determine a last known coverage area for the WCD, the last known coverage area being provided by a base station in the RAN with which the WCD was communicating when the WCD last transitioned to an idle mode,

(iii) determine an idle duration for the WCD, the idle duration being an amount of time that has passed since the WCD last transitioned to the idle state in the last known coverage area,

(iv) determine one or more target coverage areas based on the determined last known coverage area, the determined idle duration, and data regarding past activities of the WCD, and

(v) transmit a page request to one or more base stations providing the one or more determined target coverage areas to cause the one or more base stations to page the WCD.

13. The paging controller according to claim 12, wherein the program instructions are further executable by the processing unit to:

access a database including a plurality of records associated with the WCD, each record including an indication of a respective one of a plurality of last known coverage areas, an indication of a respective one of a plurality of idle durations, and an indication of a respective one of a plurality of target coverage areas; and

identify one or more of the plurality of records based on the determined last known coverage area and the determined idle duration, the determined one or more target coverage areas being determined from the identified one or more records.

14. The paging controller according to claim 13, wherein the database is stored in the data storage.

15. The paging controller according to claim 13, wherein, to identify the one or more records, the program instructions are further executable by the processing unit to determine which of the plurality of records each contains (i) an indication of last known coverage area that matches the determined last known coverage area and (ii) an indication of idle duration that approximates the determined idle duration.

16. The paging controller according to claim 13, wherein the plurality of records are based on the data regarding the past activities of the WCD.

17. The paging controller according to claim 12, wherein the program instructions are further executable by the processing unit to transmit the page request to the base station providing the last known coverage area prior to determining the one or more target coverage areas.

18. The paging controller according to claim 13, wherein the database is stored by another entity in RAN and, to determine the last known coverage area, the program instructions are further executable by the processing unit to request the last known coverage area from the another entity in the RAN.

20. A method comprising:

receiving, in a paging controller, a first communication identifying a particular wireless communication device (WCD) in a radio access network (RAN) and including an indication of a first time at which the WCD transitioned from a connected mode to an idle mode and an indication of a first coverage area in which the WCD made the transition at the first time;

after receiving the first communication, receiving, in the paging controller, a second communication identifying the WCD and including an indication of a second time at which the WCD transitioned from the idle mode to the connected mode and indication of a second coverage area in which the WCD made the transition at the second time;

determining, by the paging controller, an idle duration based on the difference between the second time and the first time;

storing, in a database, a record including an indication of the first coverage area, an indication of the idle duration, and an indication of the second coverage area, the record being associated with the WCD;

determining, in the paging controller, that the WCD should be paged;

accessing the record in the database to make a determination, by the paging controller, where to page the WCD; and

paging the WCD in accordance with the determination where to page the WCD.