Method and apparatus for selectively retrieving information from a source computer using a terrestrial or satellite interface

• US 20020073225A1
• Filed: 11/13/2001
• Published: 06/13/2002
• Est. Priority Date: 06/08/1994
• Status: Active Grant

• Current Assignee: Hughes Network Systems LLC (Echostar Corporation)
• Original Assignee: Hughes Network Systems LLC (Echostar Corporation)
• Inventors: Dillon, Douglas M., Gupta, Vivek
• Granted Patent: US 6,931,512 B2
• Time in Patent Office: Days
• US Class Current: 709/233
• CPC Class Codes: H04B 7/18582 Arrangements for data linking, i.e. for data framing, for error recovery, for multiple access
• 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 12/2856 Access arrangements, e.g. Internet access asynchronous transfer mode networks H04L12/5601; broadband local area networks H04L12/2801; optical access or distribution networks H04Q11/0067; access to open networks H04L12/5691; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M11/00; home network gateways H04L12/2834; wireless access networks H04W
• CPC Class Codes: H04L 12/2898 Subscriber equipments DSL modems H04M11/062; cable modems H04L12/2801
• CPC Class Codes: H04L 12/5692 Selection among different networks
• CPC Class Codes: H04L 2212/00 Encapsulation of packets
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/745 Reaction in network
• CPC Class Codes: H04L 47/803 Application aware
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals
• CPC Class Codes: H04L 47/825 Involving tunnels, e.g. MPLS
• CPC Class Codes: H04L 47/829 Topology based
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 61/10 of different types
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/161 Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04L 69/168 : specially adapted for link layer protocols, e.g. asynchronous transfer mode [ATM], synchronous optical network [SONET] or point-to-point protocol [PPP]
• CPC Class Codes: H04L 69/329 : in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 : Network security protocols

Abstract

A requesting terminal includes an interface that allows a user to select whether data downloaded from a network (such as the Internet) is transmitted to the requesting terminal via a high-speed link, such as a satellite link, or a lower speed link, such as a terrestrial link. Preferably, the terrestrial link (which may comprise a conventional dial-up Internet connection) is a two-way link, wherein the requesting terminal transmits data requests to the network via the terrestrial link. The data requests generated by the requesting terminal are modified to designate whether the requested data should be downloaded from the network via the terrestrial link or the satellite link. The terrestrial link may also be automatically selected for certain applications.

Claims

1. A system for retrieving data from a source computer coupled to a network, comprising:

a low-speed path linking a requesting terminal with the network;

a high-speed path linking the requesting terminal with the network; and

selection means for selecting one of the low-speed path and the high-speed path for transmission of data from the source computer to the requesting terminal.

2. The system of claim 1, wherein the low-speed path comprises a terrestrial link.

3. The system of claim 2, wherein the terrestrial link comprises a serial port in the requesting terminal in communication with a PPP provider connected to the network.

4. The system of claim 3, wherein the serial port communicates with the PPP provider via a modem.

5. The system of claim 1, wherein the low-speed path comprises a two-way link between the requesting terminal and the network.

6. The system of claim 1, wherein the requesting terminal requests data from the source computer via the low-speed path.

7. The system of claim 1, wherein the high-speed path comprises a satellite link.

8. The system of claim 1, wherein the high-speed path comprises a one-way link from the source computer to the requesting terminal.

9. The system of claim 1, wherein the high-speed path comprises a gateway connected to the network and data retrieved from the source computer is provided to the gateway via the network and transmitted to the requesting terminal via a satellite link.

10. The system of claim 1, wherein the requesting terminal includes application software for generating a data request packet for transmission from the requesting terminal to the source computer.

11. The system of claim 10, wherein the selection means comprises a driver for receiving the data request packet from the application software and modifying the request packet to specify one of the low-speed path and the high-speed path for transmission of data from the source computer.

12. The system of claim 11, wherein the request packet is an IP packet including a destination address and a source address and the driver specifies the low-speed path by changing the source address to correspond to the low-speed path.

13. The system of claim 11, wherein the request packet is an IP packet including a destination address and a source address and the driver specifies the high-speed path by tunneling the packet.

14. The system of claim 11, wherein the selection means further comprises a user interface in the requesting terminal that allows a user to specify an application to use the low-speed path.

15. The system of claim 14, wherein the driver modifies the request packet to specify one of the low-speed path and the high-speed path based on the user'"'"'s specification.

17. The system of claim 16, wherein the requesting terminal transmits a request packet to the source computer through the terrestrial interface.

18. The system of claim 17, wherein the request packet includes a destination address corresponding to the source computer and a source address corresponding to the satellite interface.

19. The system of claim 1, wherein the designating means comprises a driver that modifies the request packet to specify one of the terrestrial interface and the satellite interface.

20. The system of claim 19, wherein the driver specifies the terrestrial interface by changing the source address of the request packet to the terrestrial interface.

21. The system of claim 19, wherein the driver specifies the satellite interface by adding a new destination address corresponding to the gateway and a new source address corresponding to the terrestrial interface to the request packet.

22. The system of claim 17, wherein the designating means comprises the gateway which modifies the destination address of the request packet to correspond to the terrestrial interface.

23. The system of claim 17, wherein the designating means automatically designates that the requested data be transmitted through the terrestrial interface when the request packet corresponds to a streaming application.

24. The system of claim 16, wherein the designating means automatically designates that the requested data be transmitted through the terrestrial interface when the satellite link malfunctions.

25. The system of claim 16, wherein the designating means automatically designates that the requested data be transmitted through the terrestrial interface when the satellite link is congested.

27. The method of claim 26, wherein the step of designating a transmission path further comprises the step of modifying the request packet.

28. The method of claim 26, wherein the low-speed path comprises a terrestrial link and the high-speed path comprises a satellite link.

29. The method of claim 28, wherein the requesting terminal provides the designated data request to the source computer via the terrestrial link.

30. The method of claim 28, wherein the step of designating the transmission path further comprises the step of specifying an application to use one of the terrestrial path or the satellite path.

31. The method of claim 28, wherein the terrestrial link comprises:

a link between the requesting terminal and a PPP provider;

a link between the PPP provider and the network; and

a link between the network and the source computer.

32. The method of claim 28, wherein the satellite link comprises:

a link between the source computer and the network;

a link between the network and a gateway; and

a satellite connection between the gateway and the requesting terminal.

16. A system for retrieving data from a source computer coupled to a network, comprising:

a requesting terminal for requesting data to be retrieved from the source computer, wherein the requesting terminal includes

a terrestrial interface coupled to the network;

a satellite interface capable of receiving data transmitted via a satellite link, wherein the satellite link includes a gateway coupled to the network, and

means for designating that the requested data be transmitted from the source computer to the requesting terminal through one of the terrestrial interface and the satellite interface.

26. A method of retrieving data from a source computer coupled to a network, comprising the steps of:

generating, at a requesting terminal, a request packet for transmission of data from the source computer;

designating, at the requesting terminal, a transmission path selected from one of a low-speed path and a high-speed path for transmission of the requested data from the source computer to the requesting terminal;

providing the designated data request to the source computer, wherein the source computer generates a data reply; and

receiving the data reply from the source computer via the designated transmission path.

33. A system for retrieving data from a source computer coupled to a network, comprising:

a two-way, low-speed terrestrial path linking a requesting terminal with the network;

a one-way, high-speed satellite path linking the requesting terminal with the network; and

selection means for selecting one of the terrestrial path and the satellite path for transmission of data from the source computer to the requesting terminal.