Dynamic paging concatenation based on the likelihood of roaming

• US 8,238,906 B1
• Filed: 08/10/2010
• Issued: 08/07/2012
• 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., Vargantwar, Sachin R., Singh, Jasinder P., Shah, Maulik K.
• Primary Examiner(s): MIZRAHI, DIANE D
• Application Number:
  US12/854,114
• Time in Patent Office: 728 Days
• Field of Search: 455/432.1, 455436-445
• US Class Current: 455/432.1
• CPC Class Codes: H04W 36/00835 Determination of neighbour cell lists
• CPC Class Codes: H04W 36/008375 based on historical data
• CPC Class Codes: H04W 68/02 Arrangements for increasing efficiency of notification or paging channel

Abstract

Methods and systems for reducing the frequency of handoffs to non-preferred wireless coverage areas are presented. In particular, a RAN may determine that a WCD is likely to begin roaming. The WCD may be served by a preferred wireless coverage area and may be likely to roam to a non-preferred wireless coverage area. In order to avoid drawbacks associated with letting the WCD roam, the RAN may grant the WCD one or more forms of increased service quality. For example, the RAN may use a roaming-likelihood value as a basis for determining a page-concatenation level for the page, concatenate the page according to the determined page-concatenation level, and then transmit the page.

Claims

1. A method comprising:

a radio access network (RAN) operated by a first service provider determining that a page should be transmitted to a first wireless communication device (WCD) in a preferred coverage area of the RAN;

before transmission of the page, the RAN determining a roaming-likelihood value for the first WCD;

the RAN using the roaming-likelihood value as a basis for determining a page-concatenation level for the page; and

the RAN concatenating the page according to the determined page-concatenation level and then transmitting the page.

2. The method of claim 1, wherein the roaming-likelihood value for the first WCD indicates how likely the first WCD is to roam to a non-preferred wireless coverage area operated by another server provider, while the first WCD is operating in the preferred wireless coverage area.

3. The method of claim 1, wherein the method is carried out by a base station in the RAN.

4. The method of claim 1, wherein a switch in the RAN determines the roaming-likelihood value for the first WCD, wherein the switch has access to a table that maps WCD identifiers to respective handoff data associated with each respective WCD identifier, and wherein determining the roaming-likelihood value for the first WCD comprises the switch:

determining a WCD identifier of the first WCD;

looking up the determined given WCD identifier in the table; and

based on given respective handoff data that is stored in the table and associated with the given WCD identifier, determining that, in the past, the first WCD has been handed off from the preferred wireless coverage area to any one of the group of one or more non-preferred wireless coverage areas.

5. The method of claim 1, wherein the roaming-likelihood value comprises a percentage representing how often the first WCD has been handed off from a preferred wireless coverage area operated by the first service provider to a non-preferred wireless coverage area operated by another server provider.

6. The method of claim 1, wherein using the roaming-likelihood value as a basis for determining the page-concatenation level for the page comprises:

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

if the roaming-likelihood value is above the threshold value, then enabling concatenation for the page; and

if the roaming-likelihood value is below the threshold value, then disabling concatenation for the page.

7. The method of claim 1, wherein the RAN has access to a database mapping each of a plurality of ranges of roaming-likelihood values to a corresponding page-concatenation level, wherein using the roaming-likelihood value as a basis for determining the page-concatenation level for the page comprises the RAN accessing the database to determine the page-concatenation level that corresponds to the roaming-likelihood value for the first WCD.

8. The method of claim 7, wherein:

if the roaming-likelihood value is within a lower range, then the corresponding page-concatenation level is a first page-concatenation level;

if the roaming-likelihood value is within an intermediate range, then the corresponding page-concatenation level is a second page-concatenation level, wherein concatenating according to the second page-concatenation level results in a lesser amount of concatenation than concatenating according to the first page-concatenation level; and

if the roaming-likelihood value is within an upper range, then the corresponding page-concatenation level is a third page-concatenation level, wherein concatenating according to the third page-concatenation level results in a lesser amount of concatenation than concatenating according to the second page-concatenation level.

9. The method of claim 8, wherein the page is transmitted in a General Page Message (GPM), wherein concatenating according to the first page-concatenation level comprises concatenating such that up to eight pages can be included in the GPM, wherein concatenating according to the second page-concatenation level comprises concatenating such that up to four pages can be included in the GPM, and wherein concatenating according to the third page-concatenation level comprises disabling concatenation so that no concatenation is applied to the page.

10. The method of claim 1:

wherein the method is performed by a switch in the RAN;

wherein determining a roaming-likelihood value for the first WCD comprises a switch in the RAN querying a table storing roaming data for roaming data of the first WCD and determining the roaming-likelihood value from the roaming data; and

wherein the method further comprises the switch sending the roaming-likelihood value to at least one base station in the RAN, wherein the base station uses the roaming-likelihood value as a basis for determining the page-concatenation level for the page, concatenates the page according to the determined page-concatenation level, and then transmits the concatenated page.

11. The method of claim 1:

wherein the method is carried out by a base station in the RAN;

wherein determining a roaming-likelihood value for the first WCD comprises a base station receiving the roaming-likelihood value from a switch in the RAN; and

wherein the base station uses the roaming-likelihood value as a basis for determining the page-concatenation level for the page, concatenates the page according to the determined page-concatenation level, and then transmits the concatenated page.

12. A system comprising:

a non-transitory tangible computer-readable medium; and

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

(a) determine that a radio access network (RAN) should transmit a page to a first wireless communication device (WCD) in a preferred coverage area of the RAN, wherein the RAN is operated by a first service provider;

(b) before transmission of the page, determine a roaming-likelihood value for the first WCD;

(c) use the roaming-likelihood value as a basis to determine a page-concatenation level for the page; and

(d) concatenate the page according to the determined page-concatenation level and then transmit the page.

13. The system of claim 12, wherein the roaming-likelihood value for the first WCD indicates how likely the first WCD is to roam to a non-preferred wireless coverage area operated by another server provider, while the first WCD is operating in the preferred wireless coverage area.

14. The system of claim 12, wherein the system comprises a base station in the RAN, wherein the base station includes the tangible computer-readable medium.

15. The system of claim 12, wherein the program instructions stored in the tangible computer-readable medium and executable by at least one processor to determine the roaming-likelihood value for the first WCD comprise program instructions stored in the tangible computer-readable medium and executable by at least one processor to:

determine a WCD identifier of the first WCD;

query a table that maps WCD identifiers to respective handoff data associated with each respective WCD identifier to determine the WCD identifier of the first WCD; and

based on handoff data that is stored in the table and associated with the WCD identifier of the first WCD, determine the roaming-likelihood indicator, wherein the roaming-likelihood indicator indicates how often the first WCD has been handed off from a preferred wireless coverage area served by the first service provider to a non-preferred wireless coverage area served by another service provider.

16. The system of claim 12, wherein the program instructions stored in the tangible computer-readable medium and executable by at least one processor to use the roaming-likelihood value as a basis to determine a page-concatenation level for the page comprise program instructions stored in the tangible computer-readable medium and executable by at least one processor to:

determine whether or not the roaming-likelihood value is above a threshold value;

if the roaming-likelihood value is above the threshold value, then enable concatenation for the page; and

if the roaming-likelihood value is below the threshold value, then disable concatenation for the page.

17. The system of claim 12, wherein the program instructions stored in the tangible computer-readable medium and executable by at least one processor to use the roaming-likelihood value as a basis to determine a page-concatenation level for the page comprise program instructions stored in the tangible computer-readable medium and executable by at least one processor to:

if the roaming-likelihood value is within a lower range, then the select a first page-concatenation level;

if the roaming-likelihood value is within an intermediate range, then select a second page-concatenation level, wherein concatenating according to the second page-concatenation level results in a lesser amount of concatenation than concatenating according to the first page-concatenation level; and

if the roaming-likelihood value is within an upper range, then select a third page-concatenation level, wherein concatenating according to the third page-concatenation level results in a lesser amount of concatenation than concatenating according to the second page-concatenation level.

18. A system comprising:

one or more base stations in a radio access network (RAN) operated by a first service provider, wherein each base station is configured to page wireless communication devices (WCDs) operating in a coverage area served by the base station; and

a switch in a radio access network (RAN) operated by a first service provider, wherein the switch is configured to;

(a) determine that the RAN should transmit a page to a first WCD in a preferred coverage area of the RAN;

(b) before transmission of the page, determine a roaming-likelihood value for the first WCD; and

(c) send the page to the one or more base stations for transmission to the first WCD; and

(d) in association with sending the page to the one or more base stations, send the roaming-likelihood value to the one or base stations;

wherein each of the one or more base stations is configured to use the roaming-likelihood value as a basis to determine a page-concatenation level for the page, concatenate the page according to the determined page-concatenation level, and then transmit the page.

19. The system of claim 18, wherein the roaming-likelihood value for the first WCD indicates how likely the first WCD is to roam to a non-preferred wireless coverage area operated by another server provider, while the first WCD is operating in the preferred wireless coverage area.

20. The system of claim 18, wherein the roaming-likelihood value for the first WCD comprises a percentage representing how often the first WCD has been handed off from a preferred wireless coverage area operated by the first service provider to a non-preferred wireless coverage area operated by another server provider.