Cable data service method

• US 6,993,353 B2
• Filed: 08/08/2001
• Issued: 01/31/2006
• Est. Priority Date: 03/14/2001
• Status: Expired due to Term

• Current Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Shankaranarayanan, Nemmara K., Shur, David Hilton, Smiljanic, Aleksandra, Totland, Todd J., Van der Merwe, Jacobus E., Woodward, Sheryl Leigh, Desai, Bhavesh N.
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): Aminzay, Shaima Q.
• Application Number:
  US09/924,639
• Publication Number:
  US 20020132629A1
• Time in Patent Office: 1,637 Days
• Field of Search: 455/500, 455/452.2, 455/509, 455/3.06, 455/17, 455/21, 455/23, 455/42, 455/102, 370/486, 370/487, 370/535, 370/536, 725/107, 725/111, 725/112, 725/116, 725/120, 725/132
• US Class Current: 455/500
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• 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 12/2861 Point-to-multipoint connection from the data network to the subscribers
• CPC Class Codes: H04L 12/2874 Processing of data for distribution to the subscribers
• CPC Class Codes: H04L 25/14 Channel dividing arrangements , i.e. in which a single bit stream is divided between several baseband channels and reassembled at the receiver
• CPC Class Codes: H04L 69/14 Multichannel or multilink protocols
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A method for sending data from a transmit site to a receive site which includes dividing a transmit data stream having a first bit rate into multiple data streams with each of the multiple data streams having a bit rate which is lower than the first bit rate, transmitting each of the multiple data streams over a plurality of RF channels and recombining the multiple data streams at the receive site to provide a receive data stream having a bit rate equal to the first bit rate.

Claims

1. A method of sending data from a transmit site to a receive site, the method comprising:

dividing a transmit data stream having a first bit rate into multiple data streams with each of the multiple data streams having a bit rate which is lower than the first bit rate;

transmitting each of the multiple data streams over a cable network comprising a plurality of RF channels, wherein at least one of the RF channels has connections to a plurality of users and the connections to the plurality of users are between the transmit site and the receive site; and

recombining the multiple data streams at the receive site to provide a receive data stream having a bit rate equal to the first bit rate.

2. The method of claim 1 wherein data is sent from the transmit site to a plurality of receive sites.

3. The method of claim 1, wherein data is sent from a plurality of transmit sites to a receive site.

4. The method of claim 1 wherein each of the multiple data streams are packetized.

5. The method of claim 4 further comprising:

establishing a plurality of virtual links over each RF channel between send and receive sites; and

distributing packets over the plurality of virtual links in a controlled fashion.

6. The method of claim 5 wherein the controlled fashion is via load balancing.

7. The method of claim 5 wherein the controlled fashion takes into account scheduling policies.

8. The method of claim 4 further comprising:

maintaining a separate queue for each of the plurality of RF channels;

placing each packet into one of the separate queues; and

transmitting the packet on each of the plurality of RF channels in a predetermined order.

9. The method of claim 4 further comprising:

maintaining a separate queue for each of the plurality of RF channels;

placing each packet received from an RF channel into one of the separate queues; and

recombining each of the packets received from the RF channel into a single data stream by taking packets from the queues in a predetermined order.

10. The method of claim 1 wherein the received data stream obtained by recombining the multiple data streams is identical to the transmit data stream.

11. The method of claim 1 wherein each of the plurality of RF channels correspond to RF channels carried over an RF cable and wherein each of the RF channels is provided having a different carrier frequency.

12. The method of claim 1 wherein at least one of the channels which carries one of the multiple data streams also carries data used by at least one other user, wherein the original user and the new user receive data over a different number of RF channels.

13. The method of claim 5 wherein the virtual links are established via a tunneling process.

14. The method of claim 13 wherein the tunneling process is an IP tunneling process.

15. The method of claim 5 wherein the virtual links are established via a MAC-layer process.

16. The method of claim 1 wherein the channels are carried over a CATV plant.

17. The method of claim 1 wherein the transmit and receive data streams are carried over an optical fiber.

18. The method of claim 1 wherein each of the plurality of RF channels are adjacent in frequency.

19. The method of claim 1 wherein each of the plurality of RF channels are not adjacent in frequency.

20. The method of claim 1 wherein each of the plurality of RF channels are provided as DOCSIS channels.

21. The method of claim 20 wherein each of the plurality of DOCSIS channels are compatible for use with legacy DOCSIS users.

22. The method of claim 1 wherein at least one of the channels which carries one of the multiple data streams also carries data used by at least one other user, wherein the at least one other user only uses that channel.

23. The method of claim 1 wherein at least one of the channels which carries one of the multiple data streams also carries data used by at least one other user, wherein the at least one other user uses at least one channel not used by the original user.

24. The method of claim 1 where the number of RF channels used can change dynamically.

25. The method of claim 4 wherein the packets correspond to IP packets.

26. The method of claim 4 wherein the packets correspond to MAC layer packets.

27. The method of claim 4 wherein the packets contain one or more encapsulated IP packets.

28. The method of claim 9 wherein the recombination is done without packet identifying information.

29. The method of claim 14 wherein the transmit site utilizes a TCP gateway.