Method and system for ensuring continuous data flow between re-transmitters within a chaincast communication system

• US 6,901,604 B1
• Filed: 04/27/1999
• Issued: 05/31/2005
• Est. Priority Date: 02/19/1999
• Status: Expired due to Term

• Current Assignee: Kai-Wa Ng, Sim Wong Hoo
• Original Assignee: Chaincast, Inc.
• Inventors: Kiraly, Jozsef
• Primary Examiner(s): Miller, John
• Assistant Examiner(s): Shang, Annan Q
• Application Number:
  US09/300,784
• Time in Patent Office: 2,226 Days
• Field of Search: 725 93- 97, 725/127, 725/131, 709/213, 709/214
• US Class Current: 725/93
• CPC Class Codes: G08B 27/005 with transmission via computer network
• CPC Class Codes: G08B 27/008 with transmission via TV or radio broadcast
• CPC Class Codes: H04L 12/1854 with non-centralised forwarding system, e.g. chaincast
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/613 for the control of the source by the destination control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A method and system for performing chaincast communication to multiple communication systems (e.g., computer systems) within a system of coupled electronic devices (e.g., the Internet). The present invention provides a system wherein a broadcast source communicates primary broadcast information (e.g., encoded audio radio content, encoded audio/video television content, etc.) to a first group of electronic devices. The first group of electronic devices can be instructed by a chaincast manager to then communicate (e.g., forward or retransmit) the broadcast information to other electronic devices which devices can also be instructed to communicate to more devices, etc., thereby reducing the bandwidth requirements of the communication channel between the broadcast source and the first group of electronic devices. The chaincast manager, coupled to the Internet, is used to track and manage which devices are forwarding broadcast information to which other devices. The chaincast manager is also used to monitor the packet rates between the electronic devices. In response to the packet rates falling below a pre-determined threshold value, the transmission re-routes communications to provide better communication load sharing across the system. The chaincast communication system may also include a number of secondary broadcast servers for broadcasting secondary information content (e.g., advertisement, emergency information, community information, etc.) to be rendered independently of the primary broadcast information content.

Claims

1. A communication system comprising:

a plurality of information receiver and retransmitter devices (IRRTs) coupled to the Internet wherein each IRRT is for receiving and rendering broadcast information and for selectively retransmitting broadcast information to another IRRT, and wherein each IRRT includes a transmission buffer having a buffer forward portion for storing broadcast information to be rendered and a buffer past portion for storing broadcast information that has been rendered and can be retransmitted to another IRRT, wherein a rendering pointer separates said buffer forward and buffer past portions;

a plurality of primary broadcast servers coupled to the Internet, each for originating respective primary broadcast information that is chaincast among a group of IRRTs of said plurality of IRRTs; and

a chaincast manager coupled to said Internet and for registering said plurality of primary broadcast servers and for scheduling information transfers of said respective primary broadcast information to IRRTs based on broadcast requests generated by said IRRTs to said chaincast manager.

2. A communication system as described in claim 1 further comprising a plurality of secondary broadcast servers coupled to the Internet and each for originating respective secondary broadcast information that is chaincast among a group of IRRTs of said plurality of IRRTs.

3. A communication system as described in claim 2 wherein said chaincast manager is also for scheduling information transfers of said secondary broadcast information to IRRTs.

4. A communication system as described in claim 3 wherein said chaincast manager is also for supplying a respective IRRT with a list of all registered primary broadcast servers in response to a request by said respective IRRT for said list.

5. A communication system as described in claim 3 wherein said primary broadcast information is digitally encoded audio information representing audio programs and wherein said plurality of primary broadcast servers are radio stations.

6. A communication system as described in claim 5 wherein each IRRT comprises a computer system for rendering a graphical user interface display of a radio device for allowing a user to request one or more of said primary broadcast servers from which to receive primary broadcast information.

7. A communication system as described in claim 3 wherein said primary broadcast information is digitally encoded audio/visual information representing audiovisual programs and wherein said plurality of primary broadcast servers are television stations.

8. A communication system as described in claim 3 wherein said primary broadcast information is digitally encoded audio/visual information representing audiovisual programs and wherein said plurality of primary broadcast servers are multi-media content providers.

9. A communication system as described in claim 3 wherein said secondary broadcast information is digitally encoded audio information representing advertising content and wherein said plurality of secondary broadcast servers are advertisers.

10. A communication system as described in claim 3 wherein said secondary broadcast information is digitally encoded audio/visual information representing advertising content and wherein said plurality of secondary broadcast servers are advertisers.

11. A communication system as described in claim 3 wherein said secondary broadcast information is digitally encoded information representing news material.

12. A communication system comprising:

a plurality of information receiver and retransmitter devices (IRRTs) coupled to the Internet wherein each IRRT is for receiving and rendering broadcast information and for selectively retransmitting broadcast information to another IRRT, and wherein each IRRT includes a transmission buffer having a buffer forward portion for storing broadcast information to be rendered and a buffer past portion for storing broadcast information that has been rendered and can be retransmitted to another IRRT, wherein a rendering pointer separates said buffer forward and buffer past portions;

a plurality of primary broadcast servers coupled to the Internet and each for originating respective radio broadcast information that is chaincast among a group of IRRTs;

a plurality of secondary broadcast servers coupled to the Internet and each for originating respective advertisement broadcast information that is chaincast among a group of IRRTs; and

a chaincast manager coupled to said Internet and for registering said plurality of primary and secondary broadcast servers and for scheduling information transfers of said radio broadcast information to IRRTs based on broadcast requests generated by said IRRTs to said chaincast manager and wherein said chaincast manager is also for supplying a respective IRRT with a list of all registered primary broadcast servers in response to a request by said respective IRRT for said list.

13. A communication system as described in claim 12 wherein said chaincast manager is also for scheduling information transfers of said advertisement broadcast information to IRRTs.

14. A communication system as described in claim 13 wherein said radio broadcast information is digitally encoded audio information representing radio programs and wherein said plurality of primary broadcast servers are radio stations.

15. A communication system as described in claim 14 wherein each IRRT comprises a computer system for rendering a graphical user interface display of a radio device for allowing a user to request one or more of said primary broadcast servers from which to receive radio broadcast information.

16. A method of communicating broadcast information over the Internet comprising the steps of:

a) causing a primary server to communicate a first stream of data packets representing primary broadcast information to a first user device and rendering said primary broadcast information thereon, wherein said server and said first user device are coupled to the Internet, and wherein said first user device includes a first transmission buffer having a buffer forward portion for storing broadcast information to be rendered and a buffer past portion for storing broadcast information that has been rendered and can be retransmitted to another user device, wherein a first rendering pointer separates said buffer forward and buffer past portions;

b) causing said server to communicate a second stream of data packets representing said primary broadcast information to a second user device and rendering said primary broadcast information thereon, wherein said second user device is coupled to the Internet and configured for rendering said primary broadcast information, and wherein said second user device includes a second transmission buffer having a buffer forward portion for storing broadcast information to be rendered and a buffer past portion for storing broadcast information that has been rendered and can be retransmitted to another user device, wherein a second rendering pointer separates said buffer forward and buffer past portions;

c) causing said first user device to communicate a third stream of data packets representing said primary broadcast information to a third user device and rendering said primary broadcast information thereon, wherein said third user device is coupled to the Internet and configured for rendering said primary broadcast information, and wherein said third user device includes a third transmission buffer having a buffer forward portion for storing broadcast information to be rendered and a buffer past portion for storing broadcast information that has been rendered and can be retransmitted to another user device, wherein a third rendering pointer separates said buffer forward and buffer past portions;

d) monitoring a packet rate of said third stream; and

f) in response to said packet rate falling below a pre-determined rate, causing said second user device to communicate a fourth stream of data packets representing said primary broadcast information to said third user device.

17. A method as recited in claim 16 wherein said step (d) comprises the steps of:

monitoring a number of unrendered data packets stored in a retransmission buffer of said third user device; and

in response to said number of unrendered data packets dropping below a pre-determined level, causing said third user device to signal a chaincast manager to select said second user device.

18. A method as recited in claim 16 further comprising the steps of:

adding a fourth user device on the Internet; and

causing said third user device to communicate a fifth stream of data packets representing said primary broadcast information to said fourth user device, and wherein said fourth user device includes a fourth transmission buffer having a buffer forward portion for storing broadcast information to be rendered and a buffer past portion for storing broadcast information that has been rendered and can be retransmitted to another user device, wherein a fourth rendering pointer separates said buffer forward and buffer past portions.

19. A method as recited in claim 18 wherein said step of adding comprises the steps of:

registering said fourth user device with a chaincast manager, wherein said chaincast manager is coupled to the Internet; and

said chaincast manager instructing said third user device to communicate said fifth stream of data packets to said fourth user device.

20. A method as recited in claim 19 further comprising the steps of:

adding a secondary server on the Internet;

causing said secondary server to communicate a fifth stream of data packets representing secondary broadcast information to said first user device and rendering said secondary broadcast information on said first user device; and

causing said first user device to communicate a sixth stream of data packets representing said secondary broadcast information to said third user device and rendering said secondary broadcast information on said third user device.

21. A method as recited in claim 20 wherein said step of adding comprises the steps of:

registering said secondary server with a chaincast manager, wherein said chaincast manager is coupled to the Internet; and

said re-transmission instructing said secondary server to communicate said fifth stream of data packets to said first user device and instructing said first user device to communicate said sixth stream of data packets to said third user device.

22. A method as recited in claim 20 further comprises the step of said third user device rendering said primary broadcast information simultaneously with said secondary broadcast information.

23. A method as recited in claim 16 wherein said first, second and third user devices each comprises a hardware Internet radio device.

24. A method as recited in claim 23 wherein said primary broadcast information comprises content broadcast by a radio station.

25. A method as recited in claim 16 wherein said first, second and third user devices each comprises a computer system configured for rendering said primary broadcast information and for re-transmitting said primary broadcast information to another computer system coupled to the Internet.

26. A method of communicating Web content over the Internet comprising the steps of:

a) causing a Web server to communicate a first stream of data packets representing content of an URL (Universal Resource Locator) to a first user device and causing said first user device to render said content thereon when said URL is accessed by said first user device, and wherein said first user device includes a first transmission buffer having a buffer forward portion for storing data packets to be rendered and a buffer past portion for storing data packets that have been rendered and can be retransmitted to another user device, wherein a first rendering pointer separates said buffer forward and buffer past portions; and

b) causing said first user device to communicate a second stream of data packets representing said content of said URL to a second user device and causing said second user device to render said content thereon when said second user device accesses said URL pseudo-simultaneously with said first user device, and wherein said second user device includes a second transmission buffer having a buffer forward portion for storing data packets to be rendered and a buffer past portion for storing data packets that have been rendered and can be retransmitted to another user device, wherein a second rendering pointer separates said buffer forward and buffer past portions.

27. The method according to claim 26 further comprising the steps of:

said second user device receiving user inputs indicative of said URL; and

causing said second user device to transmit said URL to a chaincast manager, wherein said chaincast manager is coupled to the Internet and wherein said chaincast manager is for scheduling transfers of information among said Web server and said first and second user devices.

28. The method according to claim 26 wherein said first user device and said second user device each comprises a computer system.

29. The method according to claim 28 wherein said computer system comprises Web browser software having a plug-in module with chaincasting capability.

30. A communication system comprising:

a plurality of information receiver and retransmitter devices (IRRTs) coupled to the Internet and wherein each IRRT is operable to receive broadcast information, operable to render a portion of said broadcast information and configured by a chaincast manager to selectively retransmit a portion of said broadcast information to another IRRT, and wherein each IRRT includes a transmission buffer having a buffer forward portion for storing broadcast information to be rendered and a buffer past portion for storing broadcast information that has been rendered and can be retransmitted to another IRRT, wherein a rendering pointer separates said buffer forward and buffer past portions;

a plurality of primary broadcast servers coupled to the Internet, each operable to originate respective primary broadcast information that is chaincast among a group of IRRTs of said plurality of IRRTs;

a plurality of secondary broadcast servers coupled to the Internet and each operable to originate respective secondary broadcast information that is chaincast among a group of IRRTs of said plurality of IRRTs; and

wherein said chaincast manager is coupled to said Internet and operable to register said plurality of primary and secondary broadcast servers and operable to schedule information transfers of said respective primary broadcast information to IRRTs based on broadcast requests generated by said IRRTs to said chaincast manager.

31. A communication system as described in claim 30 wherein said chaincast manager is also operable to schedule information transfers of said secondary broadcast information to IRRTs.

32. A communication system as described in claim 31 wherein said chaincast manager is also for operable to supply a respective IRRT with a list of all registered primary broadcast servers in response to a request by said respective IRRT for said list.

33. A communication system as described in claim 31 wherein said primary broadcast information is digitally encoded audio information representing audio programs and wherein said plurality of primary broadcast servers are radio stations.

34. A communication system as described in claim 33 wherein each IRRT comprises a computer system operable to render a graphical user interface display of a radio device operable to allow a user to request one or more of said primary broadcast servers from which to receive primary broadcast information.

35. A communication system as described in claim 31 wherein said primary broadcast information is digitally encoded audiovisual information representing audio/visual programs and wherein said plurality of primary broadcast servers are television stations.

36. A communication system as described in claim 31 wherein said primary broadcast information is digitally encoded audio/visual information representing audio/visual programs and wherein said plurality of primary broadcast servers are multi-media content providers.

37. A communication system as described in claim 31 wherein said secondary broadcast information is digitally encoded audio information representing advertising content and wherein said plurality of secondary broadcast servers are advertisers.

38. A communication system as described in claim 31 wherein said secondary broadcast information is digitally encoded audio/visual information representing advertising content and wherein said plurality of secondary broadcast servers are advertisers.

39. A communication system as described in claim 31 wherein said secondary broadcast information is digitally encoded information representing news material.