System and method for synchronizing broadcast transmissions from wireless base stations

• US 20030235181A1
• Filed: 06/19/2002
• Published: 12/25/2003
• Est. Priority Date: 06/19/2002
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Rajkotia, Purva R., Semper, William J.
• Granted Patent: US 7,280,500 B2
• Time in Patent Office: Days
• US Class Current: 370/350
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 56/00 Synchronisation arrangements

Abstract

An apparatus for broadcasting packet data to a first wireless mobile station in a wireless network. The apparatus comprises: 1) a first broadcast controller for receiving from the first mobile station a first broadcast registration request associated with a first content server; and 2) a signaling controller capable, in response to commands from the first broadcast controller, of establishing a network communication link with, and receiving broadcast data packets from, the first content server. The signaling controller further notifies a second base station that the first base station is a broadcast center associated with the broadcast data packets from the first content server.

Claims

1. For use in association with a first base station of a wireless network capable of communicating with mobile stations located in a coverage area of the wireless network, an apparatus capable of broadcasting packet data to a first one of said wireless mobile stations comprising:

a first broadcast controller capable of receiving from said first mobile station a first broadcast registration request associated with a first content server coupled to said wireless network via an external packet data network; and

a signaling controller capable, in response to commands from said first broadcast controller, of establishing a network communication link with, and receiving broadcast data packets from, said first content server, wherein said signaling controller is further capable of notifying a second base station that said first base station is a broadcast center associated with said broadcast data packets from said first content server.

2. The apparatus as set forth in claim 1 wherein said apparatus is disposed in a base station controller associated with said first base station.

3. The apparatus as set forth in claim 2 wherein said second base station is identified from a provisioned list of regional base stations associated with said first base station.

4. The apparatus as set forth in claim 3 wherein said provisioned list is associated with said first broadcast controller.

5. The apparatus as set forth in claim 4 wherein said signaling controller is further capable of receiving from said second base station a broadcast join request to receive said broadcast data packets from said first content server, wherein said signaling controller, in response to said broadcast join request establishes a base station-base station link to said second base station and forwards said broadcast data packets to said second base station.

6. The apparatus as set forth in claim 5 wherein said base station-base station link is a handoff link.

7. The apparatus as set forth in claim 6 wherein said signaling controller synchronizes a first wireless transmission of said broadcast data packets from said first base station and a second wireless transmission of said broadcast data packets from said second base station.

8. The apparatus as set forth in claim 7 wherein said broadcast controller determines a time duration between said first broadcast registration request and a subsequent broadcast registration request and, if said time duration exceeds a predetermined threshold, said first broadcast controller terminates said first wireless transmission.

9. A wireless network comprising:

a plurality of base station capable of communicating with mobile stations located in a coverage area of said wireless network, wherein a first one of the plurality of base stations comprises;

an apparatus capable of broadcasting packet data to a first one of said wireless mobile stations comprising;

a first broadcast controller capable of receiving from said first mobile station a first broadcast registration request associated with a first content server coupled to said wireless network via an external packet data network; and

a signaling controller capable, in response to commands from said first broadcast controller, of establishing a network communication link with, and receiving broadcast data packets from, said first content server, wherein said signaling controller is further capable of notifying a second base station that said first base station is a broadcast center associated with said broadcast data packets from said first content server.

10. The wireless network as set forth in claim 9 wherein said apparatus is disposed in a base station controller associated with said first base station.

11. The wireless network as set forth in claim 10 wherein said second base station is identified from a provisioned list of regional base stations associated with said first base station.

12. The wireless network as set forth in claim 11 wherein said provisioned list is associated with said first broadcast controller.

13. The wireless network as set forth in claim 12 wherein said signaling controller is further capable of receiving from said second base station a broadcast join request to receive said broadcast data packets from said first content server, wherein said signaling controller, in response to said broadcast join request establishes a base station-base station link to said second base station and forwards said broadcast data packets to said second base station.

14. The wireless network as set forth in claim 13 wherein said base station-base station link is a handoff link.

15. The wireless network as set forth in claim 14 wherein said signaling controller synchronizes a first wireless transmission of said broadcast data packets from said first base station and a second wireless transmission of said broadcast data packets from said second base station.

16. The wireless network as set forth in claim 15 wherein said broadcast controller determines a time duration between said first broadcast registration request and a subsequent broadcast registration request and, if said time duration exceeds a predetermined threshold, said first broadcast controller terminates said first wireless transmission.

17. In a first base station of a wireless network capable of communicating with mobile stations located in a coverage area of the wireless network, a method of broadcasting packet data to a first one of the wireless mobile stations comprising the steps of:

in the first base station, receiving from the first mobile station a first broadcast registration request associated with a first content server coupled to the wireless network via an external packet data network;

in response to the first broadcast registration request, establishing a network communication link with the first content server;

receiving broadcast data packets from the first content server;

notifying a second base station that the first base station is a broadcast center associated with the broadcast data packets from the first content server.

18. The method as set forth in claim 17 further comprising the steps of:

receiving from the second base station a broadcast join request to receive the broadcast data packets from the first content server;

in response to the broadcast join request, establishing a base station-base station link to the second base station; and

forwarding the broadcast data packets to the second base station.

19. The method as set forth in claim 18 wherein the base station-base station link is a handoff link.

20. The method as set forth in claim 19 further comprising the step of synchronizing a first wireless transmission of the broadcast data packets from the first base station and a second wireless transmission of the broadcast data packets from the second base station.

21. The method as set forth in claim 20 further comprising the steps of:

determining a time duration between the first broadcast registration request and a subsequent broadcast registration request; and

if the time duration exceeds a predetermined threshold, terminating the first wireless transmission.