Method and system for synchronizing data transmissions in IP-based networks

• US 7,899,028 B2
• Filed: 03/06/2007
• Issued: 03/01/2011
• Est. Priority Date: 10/27/2006
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Semper, William Joseph
• Primary Examiner(s): Zewdu; Meless N
• Application Number:
  US11/682,738
• Publication Number:
  US 20080101333A1
• Time in Patent Office: 1,456 Days
• Field of Search: 370/310, 370312-313, 370/324, 370328-329, 370/338, 370/341, 370348-350, 370/360, 370/395.52, 370/395.62, 370/500, 370507-514, 370/520, 370343-345, 370/430, 370/468, 370/471, 370/472, 370/503, 370901-902, 370912-913, 370/915, 375/145, 375/149, 375/240.28, 375/299, 375/357, 375/358, 375363-366, 455/422.1, 455423-425, 455/434, 455/439, 455/445, 455450-451, 455/466, 455/509, 455/511, 455514-515, 455524-525, 455/550.1, 455560-561, 4554521-4522, 455/500, 455502-503, 455/517, 455/556.2
• US Class Current: 370/350
• CPC Class Codes: H04W 36/02 Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 56/009 Closed loop measurements
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

Abstract

A method and system for synchronizing data transmissions in a wireless communications network are disclosed. As one example, a method for synchronizing data transmissions in a wireless communications network is disclosed. The method includes the steps of receiving forward link data at a central access unit in the wireless communications network, forwarding the forward link data from the central access unit to a plurality of transceivers in the wireless communications network, temporarily storing the forward link data at each transceiver of the plurality of transceivers, and forwarding the temporarily stored forward link data from a first transceiver of the plurality of transceivers to a mobile station.

Claims

1. A method for synchronizing data transmissions in a wireless communications network, comprising the steps of:

receiving forward link data at a central access unit in the wireless communications network;

forwarding the forward link data from the central access unit to a plurality of transceivers in the wireless communications network in a single transmission, wherein the forward link data is temporarily stored at each transceiver of the plurality of transceivers, and a first transceiver of the plurality of transceivers forwards the temporarily stored forward link data to a mobile station;

transmitting a transceiver addition request message from the central access unit to a second transceiver, the second transceiver being a transceiver different from the plurality of transceivers; and

responsive to the transceiver addition request message, including the second transceiver in the plurality of transceivers;

forwarding the forward link data from the central access unit to the second transceiver in the plurality of transceivers;

wherein the mobile station transmits a transceiver selection message on a reverse link to the second transceiver in the plurality of transceivers, and selects the second transceiver in the plurality of transceivers for forwarding the temporarily stored forward link data.

2. The method of claim 1, wherein the mobile station selects the first transceiver of the plurality of transceivers for forwarding the temporarily stored forward link data.

3. The method of claim 1, wherein the wireless communications network comprises an Internet Protocol-based radio access network, the central access unit comprises a base station controller, and the plurality of transceivers comprises a plurality of base transceiver stations.

4. The method of claim 1, wherein the central access unit comprises a base transceiver station.

5. The method of claim 1, wherein the forward link data comprises a GRE packet.

6. The method of claim 1, wherein the forward link data comprises VoIP call data.

7. The method of claim 1, wherein:

the forward link data comprises a GRE packet; and

the GRE packet includes data for synchronizing the plurality of transceivers.

8. The method of claim 1, wherein the mobile station performs fast cell selection, and selects the first transceiver of the plurality of transceivers for forwarding the temporarily stored forward link data.

9. The method of claim 1, wherein the mobile station transmits said transceiver selection message on a reverse link to the first transceiver, wherein the reverse link is an air interface signaling link.

10. A method for synchronizing data transmissions in an Internet Protocol-based radio access network, comprising the steps of:

receiving data on a forward link at a base station controller; and

transmitting the data from the base station controller on a forward link to a plurality of base transceiver stations in a single transmission, wherein each base transceiver station of the plurality of base transceiver stations buffers the data, and a first base transceiver station of the plurality of base transceiver stations transmits the data on a forward link to a mobile station;

transmitting a base transceiver station addition request message from the base station controller to a second base transceiver station, the second base transceiver station being a transceiver different from the plurality of base transceiver stations; and

responsive to the base transceiver station addition request message, including the second base transceiver station in the plurality of base transceiver stations;

wherein the base station controller transmits the data on a forward link to the second base transceiver station in the plurality of base transceiver stations; and

wherein the mobile station transmits a base transceiver station selection message on a reverse link to the second base transceiver station in the plurality of base transceiver stations, and selects the second base transceiver station in the plurality of base transceiver stations to transmit the data on the forward link to the mobile station.

11. The method of claim 10, wherein the mobile station performs fast cell selection, and selects the first base transceiver station to transmit the data on the forward link to the mobile station.

12. The method of claim 10, wherein:

the data on the forward link comprises a GRE packet; and

the GRE packet includes data for synchronizing the plurality of base transceiver stations.

13. A system for synchronizing data transmissions in a wireless communications network, comprising:

a central access unit configured-to to;

transmit forward link data to a plurality of transceivers in a single transmission, wherein a first transceiver of the plurality of transceivers is configured to transmit the forward link data to a mobile station;

transmit a transceiver addition request message to a second transceiver, the second transceiver being a transceiver different from the plurality of transceivers; and

responsive to the transceiver addition request message, include the second transceiver in the plurality of transceivers;

forwarding the forward link data from the central access unit to the second transceiver in the plurality of transceivers;

wherein the mobile station transmits a transceiver selection message on a reverse link to the second transceiver in the plurality of transceivers, and selects the second transceiver in the plurality of transceivers for forwarding the temporarily stored forward link data.

14. The system of claim 13, wherein the wireless communications system comprises an Internet Protocol-based radio access network.

15. The system of claim 13, wherein the plurality of transceivers comprises a plurality of base transceiver stations.

16. The system of claim 13, wherein the plurality of transceivers comprises a plurality of base stations.

17. The system of claim 13, wherein the central access unit comprises a base station controller.

18. A method for synchronizing data transmissions in a wireless communications network, comprising the steps of:

receiving forward link data at a central access unit in the wireless communications network; and

forwarding the forward link data from the central access unit to a plurality of transceivers in the wireless communications network in a single transmission, wherein the forward link data is temporarily stored at each transceiver of the plurality of transceivers, and a first transceiver of the plurality of transceivers forwards the temporarily stored forward link data to a mobile station;

transmitting a transceiver addition request message from the central access unit to a second transceiver, the second transceiver being a transceiver different from the plurality of transceivers;

responsive to the transceiver addition request message, including the second transceiver in the plurality of transceivers; and

forwarding the forward link data from the central access unit to the second transceiver in the plurality of transceivers;

wherein the mobile station selects the second transceiver in the plurality of transceivers for forwarding the temporarily stored forward link data; and

wherein the second transceiver in the plurality of transceivers forwards the forward link data to the mobile station.

19. The method of claim 18, wherein the wireless communications network comprises an Internet Protocol-based radio access network, the central access unit comprises a base station controller, and the plurality of transceivers comprises a plurality of base transceiver stations.

20. The method of claim 18, wherein the central access unit comprises a base transceiver station.