Paging scheme settings of switch based on likelihood of roaming

• US 8,649,807 B1
• Filed: 08/10/2010
• Issued: 02/11/2014
• Est. Priority Date: 08/10/2010
• Status: Active Grant

• Current Assignee: Sprint Spectrum LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Oroskar, Siddharth S., Pulugurta, Srikanth
• Primary Examiner(s): AJIBADE AKONAI, OLUMIDE
• Application Number:
  US12/854,119
• Time in Patent Office: 1,281 Days
• Field of Search: 4554321-4323, 455/435.1, 455/436, 455/439, 455/440, 455/458
• US Class Current: 455/458
• CPC Class Codes: H04W 4/00 Services specially adapted for wireless communication networks; Facilities therefor
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 8/02 Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks

Abstract

Disclosed herein are methods and systems for adjusting the paging-scheme settings of a switch in an effort to reduce the likelihood that a wireless device roams from a preferred to a non-preferred coverage area. One exemplary method involves: (i) a switch in a radio access network (RAN) determining that a wireless communication device (WCD) should be paged, wherein the WCD is operating in a preferred coverage area; (ii) the switch determining a likelihood of roaming for the first WCD, wherein the likelihood of roaming indicates the likelihood that the first WCD will be handed off from the preferred coverage area to a non-preferred coverage area; (iii) based at least in part on the likelihood of roaming, the switch adjusting at least one paging-scheme setting affecting attempts to page the WCD; and (iv) paging the WCD according to the at least one adjusted paging-scheme setting.

Claims

1. A method comprising:

a switch in a radio access network (RAN) determining that a wireless communication device (WCD) should be paged, wherein the WCD is operating in a preferred coverage area;

the switch determining a likelihood of roaming for the WCD, wherein the likelihood of roaming indicates the likelihood that the WCD will be handed off from the preferred coverage area to a non-preferred coverage area;

based at least in part on the likelihood of roaming, the switch adjusting at least one paging-scheme setting affecting attempts to page the WCD; and

paging the WCD according to the at least one adjusted paging-scheme setting;

wherein determining the at least one paging-scheme setting of the switch comprises, if the likelihood of roaming is greater than a predetermined threshold, then adjusting the at least one paging-scheme setting in an effort to reduce the likelihood that the WCD will be handed off from the preferred coverage area to the non-preferred coverage area.

2. The method of claim 1, wherein paging the WCD according to the at least one adjusted paging-scheme setting comprises making one or more attempts to page the WCD, wherein each attempt comprises causing one or more base stations to transmit a page to the WCD.

3. The method of claim 1, wherein determining the at least one paging-scheme setting of the switch further comprises:

if the likelihood of roaming is less than the predetermined threshold, then using standard settings.

4. The method of claim 1, wherein determining the likelihood of roaming for the WCD comprises determining an overall roaming-likelihood indicator for the preferred coverage area.

5. The method of claim 1, wherein the switch implements a zone-based paging scheme, and wherein the at least one paging-scheme setting comprises at least one setting of the zone-based paging scheme.

6. The method of claim 5, wherein determining the at least one paging-scheme setting of the switch comprises:

determining whether or not the likelihood of roaming is above a predetermined threshold;

if the likelihood of roaming is above the predetermined threshold, then adjusting the at least one setting of the zone-based paging scheme such that the all attempts to send the page comprise system-wide transmission of the page; and

if the likelihood of roaming is below the predetermined threshold, then adjusting the at least one setting of the zone-based paging scheme such that at least a first attempt to send the page comprises transmission only in a zone in which the WCD is registered.

7. The method of claim 1, wherein the at least one paging-scheme setting comprises a maximum-attempt parameter that specifies a maximum number of attempts to send the page that can be made, and wherein determining the at least one paging-scheme setting of the switch comprises:

using the likelihood of roaming as a basis for determining a value of the maximum-attempt parameter; and

setting the maximum-attempt parameter equal to the determined value.

8. The method of claim 7, wherein the determined value of the maximum-attempt parameter increases as the likelihood of roaming increases.

9. The method of claim 1, wherein the switch is configured for intersystem paging, and wherein the at least one paging-scheme setting comprises at least one setting for intersystem paging.

10. The method of claim 9, wherein determining the at least one paging-scheme setting of the switch comprises:

determining whether or not the likelihood of roaming is above a predetermined threshold value;

if the likelihood of roaming is above the predetermined threshold, then adjusting the at least one setting for intersystem paging such that intersystem paging is enabled for all attempts to send the page; and

if the likelihood of roaming is below the predetermined threshold, then adjusting the at least one setting for intersystem paging such that intersystem paging is disabled on at least a first attempt to send the page.

11. The method of claim 1, wherein the switch is configured to start a page-attempt timer after an attempt to send the page and to make a next attempt to send the page when an acknowledgement from the WCD is not received before the page-attempt timer expires, and wherein determining the at least one paging-scheme setting of the switch comprises using the likelihood of roaming as a basis for determining a duration of the page-attempt timer.

12. The method of claim 11, wherein the determined duration of the page-attempt timer increases as the likelihood of roaming increases.

13. A system comprising:

a non-transitory tangible computer-readable medium;

program instructions stored in the computer-readable medium that are executable by at least one processor to;

(a) determine that a switch in a radio access network (RAN) should page a wireless communication device (WCD), wherein the WCD is operating in a preferred coverage area of the RAN;

(b) determine a likelihood of roaming for the WCD, wherein the likelihood of roaming indicates the likelihood that the WCD will be handed off from the preferred coverage area to a non-preferred coverage area;

(c) if the likelihood of roaming is greater than a predetermined threshold, then adjust the at least one paging-scheme setting is set in an effort to reduce the likelihood that the WCD will be handed off from the preferred coverage area to the non-preferred coverage area, and, if the likelihood of roaming is less than the predetermined threshold, then use standard settings to page the WCD; and

(d) cause the switch to page the WCD according to the at least one adjusted paging-scheme setting.

14. The system of claim 13, wherein the system takes the form of a switch comprising the non-transitory tangible computer-readable medium.

15. The system of claim 13, wherein the switch implements a zone-based paging scheme, and wherein the at least one paging-scheme setting comprises at least one setting of the zone-based paging scheme.

16. The system of claim 13, wherein the at least one paging-scheme setting comprises a maximum-attempt parameter that specifies a maximum number of attempts to send the page that can be made.

17. The system of claim 13, wherein the switch is configured for intersystem paging, and wherein the at least one paging-scheme setting comprises at least one setting for intersystem paging.

18. The system of claim 13, wherein the switch is configured to start a page-attempt timer after an attempt to send the page and to make a next attempt to send the page when an acknowledgement from the WCD is not received before the page-attempt timer expires, and wherein the at least one paging-scheme setting of the switch comprises a duration of the page-attempt timer.

19. A method comprising:

a switch in a radio access network (RAN) determining that a wireless communication device (WCD) should be paged, wherein the WCD is operating in a preferred coverage area;

the switch determining a likelihood of roaming for the WCD, wherein the likelihood of roaming indicates the likelihood that the WCD will be handed off from the preferred coverage area to a non-preferred coverage area, wherein the likelihood of roaming is a percentage representing how often the WCD has been handed off from the preferred wireless coverage area operated by a first service provider to a non-preferred wireless coverage area operated by another server provider;

based at least in part on the likelihood of roaming, the switch adjusting at least one paging-scheme setting affecting attempts to page the WCD; and

paging the WCD according to the at least one adjusted paging-scheme setting.