System and method for use in an MSC-BS interface for supporting an access state handoff

• US 6,549,787 B1
• Filed: 04/26/1999
• Issued: 04/15/2003
• Est. Priority Date: 04/26/1999
• Status: Expired due to Term

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ravi, Shobha C.
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): Trinh, Sonny
• Application Number:
  US09/299,471
• Time in Patent Office: 1,450 Days
• Field of Search: 455/442, 455/510, 455/514, 455/560, 455/450, 455/524, 455/453, 455/434, 455/436, 455/435, 455/525, 370/331, 370/332, 370/335
• US Class Current: 455/525
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 8/245 from a network towards a terminal
• CPC Class Codes: H04W 92/14 between access point controllers and backbone network device

Abstract

There is disclosed, for use in a wireless network comprising a plurality of base stations communicating with mobile devices, an apparatus for establishing a call connection between a mobile device and one of the base stations (BS). The apparatus comprises a message control processor that receives from one or more base stations cell information messages transmitted by the mobile station. Each cell information message contains cell ID data identifying the base station(s) from which the mobile station is receiving wireless messages. If the message control processor receives a first cell information message from a first BS and subsequently receives a second cell information message from a second BS, the message control processor continues to process only the first cell information message if the cell ID data in the second cell information message is the same as the cell ID data in the first cell information message. However, if the cell ID data in the second cell information message is different than the cell ID data in the first cell information message, the message control processor aborts processing of the first cell information message and begins processing the second cell information message.

Claims

1. For use in a wireless network comprising a plurality of base stations capable of communicating with a plurality of mobile devices, an apparatus for establishing a call connection between a first one of said plurality of mobile devices and one of said plurality of base stations, said apparatus comprising:

a message control processor for establishing said call connection, said message control processor capable of receiving from said plurality of base stations cell information messages generated by said first mobile station, each of said cell information messages comprising cell identification (ID) data identifying ones of said plurality of base stations from which said first mobile station is receiving wireless messages, wherein said message control processor, in response to receipt of a first cell information message from a first base station and receipt of a subsequent second cell information message from a second base station, compares the cell ID data within said first and second cell information messages, selectively processes only one of said first and second cell information messages based on the comparison of the cell ID data within said first and second cell information messages and transmits to only one of said first and second base stations a resource allocation message capable of establishing said call connection with said first mobile station.

2. The apparatus set forth in claim 1 wherein said apparatus is disposed in a mobile switching center of said wireless network.

3. The apparatus set forth in claim 1 wherein said message control processor compares first cell ID data of said first cell information message and second cell ID data of said second cell information message, and, if said second cell ID data is the same as said first cell ID data, said message control processor processes said first cell information message and transmits said resource allocation message to said first base station.

4. The apparatus set forth in claim 1 wherein said message control processor compares first cell ID data of said first cell information message and second cell ID data of said second cell information message, and, if said second cell ID data is different than said first cell ID data, said message control processor processes said second cell information message and transmits said resource allocation message to said second base station.

5. The apparatus set forth in claim 1 further comprising a timer associated with said message control processor capable of measuring a time period, T, after receipt of said first cell information message, wherein said message control processor processes only said first cell information messages and transmits said resource allocation message only to said first base station if said second cell information message is received after said time period, T, expires.

6. The apparatus set forth in claim 1 wherein said message control processor compares first cell ID data of said first cell information message and second cell ID data of said second cell information message, and, if said second cell ID data is the same as said first cell ID data, said message control processor continues processing said first cell information message and ignores said second cell information message.

7. The apparatus set forth in claim 1 wherein said message control processor compares first cell ID data of said first cell information message and second cell ID data of said second cell information message, and, if said second cell ID data is different than said first cell ID data, said message control processor stops processing said first cell information message and begins processing said second cell information message.

8. A wireless network comprising:

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

a message control processor for establishing a call connection between a first one of said plurality of mobile devices and one of said plurality of base stations, said message control processor capable of receiving from said plurality of base stations cell information messages generated by said first mobile station, each of said cell information messages comprising cell identification (ID) data identifying ones of said plurality of base stations from which said first mobile station is receiving wireless messages, wherein said message control processor, in response to receipt of a first cell information message from a first base station and receipt of a subsequent second cell information message from a second base station, compares the cell ID data within said first and second cell information messages, selectively processes only one of said first and second cell information messages based on the comparison of the cell ID data within said first and second cell information messages and transmits to only one of said first and second base stations a resource allocation message capable of establishing said call connection with said first mobile station.

9. The wireless network set forth in claim 8 wherein said message control processor is disposed in a mobile switching center of said wireless network.

10. The wireless network set forth in claim 8 wherein said message control processor compares first cell ID data of said first cell information message and second cell ID data of said second cell information message, and if said second cell ID data is the same as said first cell ID data, said message control processor processes said first cell information message and transmits said resource allocation message to said first base station.

11. The wireless network set forth in claim 8 wherein said message control processor compares first cell ID data of said first cell information message and second cell ID data of said second cell information message, and if said second cell ID data is different than said first cell ID data, said message control processor processes said second cell information message and transmits said resource allocation message to said second base station.

12. The wireless network set forth in claim 8 further comprising a timer associated with said message control processor capable of measuring a time period, T, after receipt of said first cell information message, wherein said message control processor processes only said first cell information messages and transmits said resource allocation message only to said first base station if said second cell information message is received after said time period, T, expires.

13. The wireless network set forth in claim 8 wherein said message control processor compares first cell ID data of said first cell information message and second cell ID data of said second cell information message, and, if said second cell ID data is the same as said first cell ID data, said message control processor continues processing said first cell information message and ignores said second cell information message.

14. The wireless network set forth in claim 8 wherein said message control processor compares first cell ID data of said first cell information message and second cell ID data of said second cell information message, and, if said second cell ID data is different than said first cell ID data, said message control processor stops processing said first cell information message and begins processing said second cell information message.

15. The wireless network set forth in claim 8 further comprising a memory coupled to said message control processor capable of storing said cell information messages.

16. For use in a wireless network comprising a plurality of base stations capable of communicating with a plurality of mobile devices, a method of establishing a call connection between a first one of the plurality of mobile devices and one of the plurality of base stations, the method comprising the steps of:

receiving from a first base station a first cell information message generated by the first mobile station, the cell information message comprising first cell identification (ID) data identifying ones of the plurality of base stations from which the first mobile station is receiving wireless messages;

after receipt of the first cell information message, receiving from a second base station a second cell information message generated by the first mobile station, the second cell information message comprising second cell identification (ID) data identifying ones of the plurality of base stations from which the first mobile station is receiving wireless messages;

comparing the first cell ID data and the second cell ID data; and

processing only one of the first and second cell information messages based on the comparison of the first and second cell ID data and transmitting to only one of the first and second base stations a resource allocation message capable of establishing the call connection with the first mobile station.

17. The method set forth in claim 16 comprising the further step of, if the second cell ID data is the same as the first cell ID data, processing the first cell information message and transmitting the resource allocation message to the first base station.

18. The method set forth in claim 16 comprising the further steps of, if the second cell ID data is different than the first cell ID data, processing the second cell information message and transmitting the resource allocation message to the second base station.

19. The method set forth in claim 16 comprising the further steps of, if the second cell ID data is the same as the first cell ID data, continuing to process the first cell information message and ignoring the second cell information message.

20. The method set forth in claim 16 comprising the further steps of, if the second cell ID data is the different than the first cell ID data, ceasing processing of the first cell information message and beginning to process the second cell information message.