Mobility across satellite beams using L2 connectivity

• US 10,404,355 B2
• Filed: 10/03/2017
• Issued: 09/03/2019
• 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:
  US15/724,101
• Publication Number:
  US 20180234167A1
• Time in Patent Office: 700 Days
• Field of Search: 370401, 370316, 370310, 370331, 370332, 370334, 370349
• 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 a communication service for an aircraft by a first gateway servicing a first spot beam having a first spot beam coverage area that includes a location of the aircraft;

identifying session information associated with a communication session of a device on the aircraft;

communicating, via the first gateway servicing the first spot beam, first session traffic associated with the communication session according to the session information, the first session traffic associated with an application executing on the device;

identifying an imminent transition of the aircraft from being provided the communication service via the first spot beam to being provided the communication service via a second spot beam that is serviced by a second gateway;

sending, from the first gateway to the second gateway, a handoff message for handoff of the communication session for the device from the first gateway to the second gateway, the handoff message comprising the session information; and

communicating, upon the transition of the aircraft to being provided the communication service via the second spot beam serviced by the second gateway, second session traffic associated with the application via the second gateway servicing the second spot beam, the second session traffic being communicated according to the session information.

2. The method of claim 1, further comprising:

switching the first session traffic between a content network and the first gateway according to the session information; and

switching the second session traffic between the content network and the second gateway according to the session information.

3. The method of claim 1, wherein the session information comprises an Internet Protocol (IP) address assigned to the device for the communication session, and wherein the connectivity for the communication session for the device via the second gateway is maintained using the assigned IP address.

4. The method of claim 1, wherein the first gateway and the second gateway are in communication at layer-2 (L2) of the OSI model.

5. The method of claim 1, wherein the handoff message comprises a message at layer-3 (L3) of the OSI model.

6. The method of claim 1, wherein the first session traffic is communicated using a layer-3 (L3) protocol.

7. 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.

8. The method of claim 1, wherein each of the first gateway and the second gateway are provided a service for the first session traffic by a core node.

9. The method of claim 8, wherein the service comprises at least one of an authentication service, an acceleration service, a file transfer service, a traffic shaping service, a dynamic host configuration protocol service, a domain name system (DNS) service, a network logging service, or an encryption service.

10. A system for providing mobility across satellite beams, the system comprising:

a first gateway servicing a first spot beam having a first spot beam coverage area, the first gateway providing a communication service for an aircraft at a location within the first spot beam coverage area, the first gateway communicating first session traffic according to session information associated with a communication session of a device on the aircraft, the communication session associated with an application executing on the device; and

a second gateway servicing a second spot beam,

wherein the first gateway identifies an imminent transition of the aircraft from being provided the communication service via the first spot beam to being provided the communication service via the second spot beam and sends a handoff message to the second gateway for handoff of the session information for the communication session of the device from the first gateway to the second gateway,

and wherein the second gateway communicates, upon the transition of the aircraft to being provided the communication service via the second spot beam serviced by the second gateway, second session traffic associated with the communication session according to the session information.

11. The system of claim 10, further comprising a ground segment network coupled with the first gateway and the second gateway, wherein the ground segment network:

switches the first session traffic between a content network and the first gateway according to the session information; and

switches the second session traffic between the content network and the second gateway according to the session information.

12. The system of claim 10, wherein the session information comprises an Internet Protocol (IP) address assigned to the device for the communication session, and wherein the connectivity for the communication session for the device via the second gateway is maintained using the assigned IP address.

13. The system of claim 10, wherein the first gateway and the second gateway are in communication at layer-2 (L2) of the OSI model.

14. The system of claim 10, wherein the handoff message comprises a message at layer-3 (L3) of the OSI model.

15. The system of claim 10, wherein the first session traffic is communicated using a layer-3 (L3) protocol.

16. The system of claim 10, wherein the device is one of a smartphone, a PDA, a laptop computer, a mobile computer, or a cellular telephone.

17. The system of claim 10, further comprising:

a core node coupled with each of the first gateway and the second gateway, wherein the core node provides a service for each of the first gateway and the second gateway.

18. The system of claim 17, wherein the service comprises at least one of an authentication service, an acceleration service, a file transfer service, a traffic shaping service, a dynamic host configuration protocol service, a domain name system (DNS) service, a network logging service, or an encryption service.