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Satellite routing protocol with dynamic IP addressing

a satellite routing and dynamic ip addressing technology, applied in the field of satellite communication via satellite links, can solve the problems of dama network use problems, difficult management of applications in the ip network, and traditional routing approaches are unable to discover routes to nodes, etc., to achieve stability and slow down the effect of route convergen

Inactive Publication Date: 2006-04-20
VIASAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional routing approaches are unable to discover routes to nodes for which there is no current active connection.
Without this assumption, it would be difficult to manage applications in the IP network.
While the standard Internet routing protocol RIPv2 is adequate for use in the LAN environment, it has problems for use over the DAMA network.
This causes needless information to be sent between all DAMA sites participating in IP routing.
Clearly, this approach will not scale well.
One solution is to back off from the 30 second update rate, but that has the side effect of slowing down route convergence.
These mobile subnets will move around, and be very transitory.

Method used

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  • Satellite routing protocol with dynamic IP addressing
  • Satellite routing protocol with dynamic IP addressing
  • Satellite routing protocol with dynamic IP addressing

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Network Diagram

[0071]FIG. 1 is a diagram of major components of a network environment 10 in which the present invention may be implemented.

[0072] Mobile networks 12, 14, 16, 18, 20 may be connected to a gateway WAN 22 network via a VSAT DAMA WAN 24 or a Remote Terrestrial LAN 26. The location of a given mobile network can change geographically, but the IP network prefix assigned will remain the same. DHCP and NAT services (not shown) may be used on the Mobile Nets 12, 14, 16, 18, 20 in order to support this mobile movement of computing resources. The use of these two services, and the IP routing involved, will be discussed hereinafter.

[0073] In accordance with the invention, a set of IP network prefixes is assigned to support networks reachable via the VSAT DAMA WAN 24. Additionally, a set of IP network prefixes is assigned for the Remote Terrestrial LANs 26. These networks are typically permanently assigned, so that a Mobile Boundary Router (MBR) at a VSAT LAN 32 and the MARs 3...

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Abstract

A method for establishing routing for communications using a satellite in a Demand Assigned Multiple Access (DAMA) Wide Area Network (WAN) is disclosed. In one step, Routing Information Messages (RIMs) are received from a plurality of subscriber terminal (ST) nodes at a Network Control Station (NCS). A network map of Internet protocol (IP) network prefixes reachable via the DAMA WAN is constructed using the RIMs. A bandwidth constricted control channel is allocated using the satellite. At least one control channel message is sent over the bandwidth constricted control channel to at least one ST node coupled to the WAN.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS [0001] This application is a continuation application of U.S. patent application Ser. No. 09 / 822,966 filed Mar. 29, 2001, which claims the benefit of U.S. Provisional Patent Application No. 60 / 196,054 filed Apr. 10, 2000.BACKGROUND OF THE INVENTION [0002] This invention relates to packet-switched communications via satellite links. A class of communication networks employ packet-switched routing. Typically, linking is established by local communication paths and local traffic management in which the traffic management mechanism is only in communication with those nodes through which traffic is actively passed. Traditional routing approaches are unable to discover routes to nodes for which there is no current active connection. In a demand assigned satellite network, a node may be directly connected to any other node, upon request, but may only be able to support a small number of connections at any time. A mechanism is needed for finding rout...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04Q7/00H04L12/28H04B7/185H04L12/56
CPCH04B7/18584
Inventor EIDENSCHINK, THOMASNAVARRO, ARIELROMERO, LUISWILE, STACY
Owner VIASAT INC
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