Mobility across satellite beams using L2 connectivity

• US 9,432,896 B2
• Filed: 01/13/2016
• Issued: 08/30/2016
• Est. Priority Date: 04/17/2009
• Status: Active Grant

• Current Assignee: ViaSat Incorporated
• Original Assignee: ViaSat Incorporated
• Inventors: Foxworthy, Michael, Chandran, Girish, Lau, Jason
• Primary Examiner(s): Pham, Brenda H
• Application Number:
  US14/994,957
• Publication Number:
  US 20160183142A1
• Time in Patent Office: 230 Days
• Field of Search: 370/316, 370/315, 370/310.2, 370/328, 370/338
• US Class Current: 1/1
• CPC Class Codes: H04B 7/18513 Transmission in a satellite or space-based system
• CPC Class Codes: H04B 7/18541 for handover of resources
• CPC Class Codes: H04B 7/18584 Arrangements for data networking, i.e. for data packet routing, for congestion control data switching networks H04L12/00
• CPC Class Codes: H04B 7/18591 Arrangements for interconnecting multiple systems data switching networks H04L12/00
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04L 69/325 in the network layer [OSI layer 3], e.g. X.25 H04L69/16 takes precedence
• CPC Class Codes: H04W 36/0016 Hand-off preparation specially adapted for end-to-end data sessions
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 36/142 over the same radio air interface technology
• CPC Class Codes: H04W 84/06 Airborne or Satellite Networks space-based or airborne stations H04B7/185
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

Systems and methods for providing mobility across satellite beams, are described. The system includes a first core node, a second core node in communication with the first core node at layer-2 of the OSI model (L2), and a first gateway in communication, at L2, with the first core, the first gateway configured to provide access to a first spot beam at a first location. The system further includes a second gateway in communication, at L2, with the second core node, the second gateway configure to provide access to a second spot beam at a second location, and a mobile device, at the first location, in communication with the first gateway via the first spot beam, wherein the mobile device is assigned an IP address by the first core node. The mobile device moves from the first location to the second location. Further, the first gateway, in response to the mobile device moving from the first location to the second location, notifies the second gateway, through the first core node and the second core node, that the mobile device is moving to the second location, and transmit the session information to the second gateway, and the second gateway, in response to the notification, maintains connectivity with the mobile device using the IP address.

Claims

1. A method of satellite communication, the method comprising:

providing communication service of an aircraft via a first spot beam of a satellite;

obtaining an IP address for a device within the aircraft;

communicating, via the first spot beam, first communications of a communication session of the device using the IP address;

transitioning the communication service of the aircraft to a second spot beam when the aircraft is within an overlap of the first spot beam and the second spot beam, wherein the second spot beam is serviced by a gateway having session information for maintaining connectivity of the communication session of the device; and

communicating, via the second spot beam, second communications of the communication session of the device using the IP address.

2. The method of claim 1, wherein:

the first spot beam is serviced by a first gateway;

the second spot beam is serviced by a second gateway, the second gateway having the session information; and

the transitioning of the communication service comprises changing from the first gateway to the second gateway.

3. The method of claim 2, wherein the second gateway obtains the session information prior to the transitioning of the communication service of the aircraft to the second spot beam.

4. The method of claim 3, wherein the second gateway obtains the session information from the first gateway via a core node.

5. The method of claim 4, wherein the core node and the first and second gateways are on the same non-routed network.

6. The method of claim 1, wherein the transitioning of the communication service of the aircraft to the second spot beam is based on an indication that the aircraft is within the overlap.

7. The method of claim 1, further comprising detecting that the aircraft is within the overlap of the first spot beam and the second spot beam, and wherein the transitioning of the communication service of the aircraft to the second spot beam is in response the detection.

8. The method of claim 7, wherein the first spot beam has a first coverage area, and the second spot beam has a second coverage area at least partially overlapping the first coverage area.

9. The method of claim 1, wherein the satellite includes the first spot beam and the second spot beam.

10. The method of claim 1, wherein the session information includes the IP address of the device.

11. The method of claim 1, wherein the session information includes application information of an application executing on the device.

12. The method of claim 1, wherein the device remains within the same network when the communication service of the aircraft transitions from the first spot beam to the second spot beam.

13. The method of claim 1, wherein the communication session is between the device and an external network.

14. The method of claim 1, wherein the first spot beam is serviced by a first gateway and the second spot beam is serviced by a second gateway, and wherein the first gateway and the second gateway are each a non-autonomous gateway.

15. The method of claim 1, wherein the IP address is associated with a local area network.

16. The method of claim 1, wherein the IP address is a subnet address.

17. The method of claim 1, wherein the communication session is associated with an application executing on the device.

18. The method of claim 1, wherein the communication session is a virtual private network session.

19. The method of claim 1, wherein the connectivity of the communication session of the device is not lost during the transitioning of the communication service of the aircraft to the second spot beam.

20. The method of claim 1, wherein the device is one of a smartphone, a PDA, a laptop computer, a mobile computer, or a cellular telephone.