System and method for controlling priority calls in a wireless network

• US 6,321,093 B1
• Filed: 07/28/1999
• Issued: 11/20/2001
• Est. Priority Date: 08/07/1998
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Dalal, Neerav N.
• Primary Examiner(s): LE, THANH C
• Application Number:
  US09/362,835
• Time in Patent Office: 846 Days
• Field of Search: 455/450, 455/452, 455/453, 455/509, 455/510, 455/512, 455/513, 455/514, 455/515, 455/516
• US Class Current: 455/512
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

There is disclosed a wireless communications network in which a group of base stations are served by a mobile switching center that maintains a master data record for all missed calls from mobile devices in all base station coverage areas. Missed call data are stored in different priority level queues in each of the bases stations. When a call is missed in a first base station coverage area, a time stamp or a sequence number for the missed call is stored in the mobile switching center. If the mobile device moves into a second base station coverage area, the mobile device re-originates the missed call. The second base station receives from the mobile switching center the priority level of the re-originated call and the time stamp or unique sequence number from the mobile switching center. If the second base station does not have a traffic channel available, the second base station puts the missed call in the proper priority level queue and, within that proper priority level queue, can use the time stamp or the sequence number to determine the priority of the missed call relative to the pre-existing missed calls already in the priority level queue.

Claims

1. For use in a wireless communication network comprising a plurality of base stations capable of communicating with a plurality of mobile devices, an apparatus for maintaining a priority of a missed call from a first mobile device being served by a first base station, said apparatus comprising:

a central controller capable of receiving from a first base station a first message indicating that said first base station is unable to service a pending call from a selected one of said plurality of mobile devices and assigning to said pending missed call a priority indicia;

a memory capable of storing said priority indicia;

a priority indicia controller capable of sending said priority indicia to a second base station in response to a receipt from said second base station of a second message indicating that said selected one of said plurality of mobile devices is being serviced by said second base station, wherein said second base station uses said priority indicia to maintain said priority of said pending missed call with respect to at least one pre-existing pending missed calls being serviced by said second base station.

2. The apparatus set forth in claim 1 wherein said central controller is disposed in said first base station.

3. The apparatus set forth in claim 1 wherein said priority indicia controller is disposed in a mobile switching center of said wireless communication network.

4. The apparatus set forth in claim 1 wherein said memory comprises a plurality of queues, wherein each of said queues is capable of storing call information associated with calls having a similar priority level.

5. The apparatus set forth in claim 4 wherein said calls having a similar priority level are serviced by said first base station on a first-come, first-served basis.

6. The apparatus set forth in claim 4 wherein said plurality of queues comprises an emergency queue for storing priority indicia associated with emergency calls.

7. The apparatus set forth in claim 4 wherein said plurality of queues comprises a preferred queue for storing priority indicia associated with calls received from subscribers belonging to a premium class of service.

8. The apparatus set forth in claim 1 wherein said priority indicia comprises a time stamp associated with said pending missed call.

9. A wireless communication network comprising:

a plurality of base stations capable of communicating with a plurality of mobile devices; and

an apparatus for maintaining a priority of a missed call from a first mobile device being served by a first base station, said apparatus comprising;

a central controller capable of receiving from a first base station a first message indicating that said first base station is unable to service a pending call from a selected one of said plurality of mobile devices and assigning to said pending missed call a priority indicia;

a memory capable of storing said priority indicia; and

a priority indicia controller capable of sending said priority indicia to a second base station in response to a receipt from said second base station of a second message indicating that said selected one of said plurality of mobile devices is being serviced by said second base station, wherein said second base station uses said priority indicia to maintain said priority of said pending missed call with respect to at least one pre-existing pending missed calls being serviced by said second base station.

10. The wireless communication network set forth in claim 9 wherein said central controller is disposed in said first base station.

11. The wireless communication network set forth in claim 9 wherein said priority indicia controller is disposed in a mobile switching center of said wireless communication network.

12. The wireless communication network set forth in claim 9 wherein said memory comprises a plurality of queues, wherein each of said queues is capable of storing call information associated with calls having a similar priority level.

13. The wireless communication network set forth in claim 12 wherein said calls having a similar priority level are serviced by said first base station on a first-come, first-served basis.

14. The wireless communication network set forth in claim 12 wherein said plurality of queues comprises an emergency queue for storing priority indicia associated with emergency calls.

15. The wireless communication network set forth in claim 12 wherein said plurality of queues comprises a preferred queue for storing priority indicia associated with calls received from subscribers belonging to a premium class of service.

16. The wireless communication network set forth in claim 9 wherein said priority indicia comprises a time stamp associated with said pending missed call.

17. For use in a wireless communication network comprising a plurality of base stations capable of communicating with a plurality of mobile devices, a method of maintaining a priority of a missed call from a first mobile device being served by a first base station, the method comprising the steps of:

receiving from a first base station a first message indicating that the first base station is unable to service a pending call from a selected one of the plurality of mobile devices;

assigning to the pending missed call a priority indicia;

storing the priority indicia in a memory;

sending the priority indicia to a second base station in response to a receipt from the second base station of a second message indicating that the selected one of the plurality of mobile devices is being serviced by the second base station, wherein the second base station uses the priority indicia to maintain the priority of the pending missed call with respect to at least one pre-existing pending missed calls being serviced by the second base station.

18. The method set forth in claim 17 wherein the memory comprises a plurality of queues, wherein each of the queues is capable of storing call information associated with calls having a similar priority level.

19. The method set forth in claim 18 wherein the calls having a similar priority level are serviced by the first base station on a first-come, first-served basis.

20. The apparatus set forth in claim 18 wherein the plurality of queues comprises an emergency queue for storing priority indicia associated with emergency calls.