Methods for multicasting content

• US 7,966,414 B2
• Filed: 10/23/2002
• Issued: 06/21/2011
• Est. Priority Date: 10/24/2001
• Status: Active Grant

• Current Assignee: Rateze Remote Mgmt. L.L.C. (Intellectual Ventures LLC)
• Original Assignee: Darby & Mohaine, LLC
• Inventors: Nardello, Barbara, Delmenico, Andreas, Vallino, Fabio, Cinghita, Luchiana, Stefanini, Ivan
• Primary Examiner(s): NAWAZ, ASAD M
• Assistant Examiner(s): Ismail; Shawki S
• Application Number:
  US10/278,722
• Publication Number:
  US 20030093548A1
• Time in Patent Office: 3,163 Days
• Field of Search: 709203-204, 709/217, 709/219, 709223-226, 709/229, 709230-232, 709/236, 370254-255
• US Class Current: 709/231
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 12/4633 Interconnection of networks using encapsulation techniques, e.g. tunneling
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/611 for multicast or broadcast systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06

Abstract

A computer-implemented method for tunneling content across a network in which the content has been configured into a digital format compatible with a player. Prior to starting a broadcast session, an announcement is transmitted across the network which contains control information concerning the broadcast session. The control information permits controlled reception of the configured content and includes a start-time. The configured content is encapsulated into a format that supports multicast distribution and controlled reception at particular machines. The configured content is multicast across the network in the encapsulated format to a multiplicity of machines in accordance with the start-time included in the announcement. The control information is used to selectively permit reception at particular ones of the multiplicity of machines, and the encapsulation is stripped from the multicast transmission at the particular machines. As a result, the multicast of the encapsulated data is compatible with the players on the particular machines. A system for implementing UDP tunneling multicasting method is also disclosed.

Claims

1. A computer-implemented method for tunneling content across a network, the content being configured into a digital format compatible with a player that operates on a particular machine connectable to the network, comprising:

receiving subscription information to a broadcast session of the content from users;

before starting the broadcast session, transmitting an announcement containing control information concerning the broadcast session across the network to the subscribing users, the control information including content identifying data permitting controlled reception of the content by the subscribing users and including a start-time, wherein the announcement comprises a subscription message that identifies a multicast encapsulation protocol;

encapsulating the content into a format that supports multicast distribution and controlled reception at particular machines on the network, wherein encapsulating the content includes adding at least one layer of the multicast encapsulation protocol to the content; and

multicasting across the network the content in the encapsulated format to a multiplicity of machines in accordance with the start-time included in the announcement, wherein the content identifying data of the control information permits selective reception of the content at particular ones of the multiplicity of machines of the subscribing users, and further wherein the at least one layer of the multicast encapsulation protocol is removed from the multicast content according to the multicast encapsulation protocol included in the subscription message at the ones of the multiplicity of machines to obtain the content in the digital format compatible with the player operating on at least one of the multiplicity of machines.

2. The method of claim 1, wherein the digital format compatible with the player is a unicast packet format, and wherein encapsulating the configured content comprises disposing the unicast packet format within a multicast packet.

3. The method of claim 1, wherein encapsulating the content comprises engrafting a packet based on the content.

4. The method of claim 3, wherein the engrafted packet comprises a header.

5. The method of claim 1, wherein removing the at least one layer of the multicast encapsulation protocol is performed by a multicast-ready interface executing on the ones of the multiplicity of machines.

6. The method of claim 1, wherein the broadcast session comprises a multicast of the content.

7. The method of claim 1, wherein the announcement is multicast.

8. The method of claim 1, wherein the announcement includes broadcast guide information.

9. The method of claim 1, wherein the subscription message further includes a time and a channel of the broadcast session.

10. The method of claim 1, wherein the subscription message further includes information necessary to decrypt the multicast content.

11. The method of claim 1, wherein the encapsulated content is multiplexed prior to multicasting across the network and demultiplexed at the ones of the multiplicity of machines.

12. The method of claim 1, further comprising providing a back-channel return path to a content provider from the multiplicity of machines.

13. A computer-implemented system for tunneling content across a network, the content being configured into a digital format, comprising:

a network administrator configured to receive the content from a content provider and to broadcast the content in a multicast protocol across the network, the network administrator comprising a programmed machine including;

a subscription control manager configured to receive subscription information to a broadcast session of the content from end-users;

a broadcast guide broadcaster configured to transmit an announcement containing control information that includes subscription data concerning the broadcast session to machines of subscribing end-users that are in communication with the network, the control information automatically permitting controlled reception of the content by the subscribing end-users based upon the subscription information received from the subscribing end-users and including a start-time, the announcement being broadcast prior to the broadcast of the content, wherein the announcement comprises a subscription message that identifies a multicast encapsulation protocol that is employed in encapsulating the content; and

a UTP broadcaster configured to apply the multicast encapsulation protocol to the content and to multicast the encapsulated content across the network to the machines of the subscribing end-users, wherein the UTP broadcaster is configured to add at least one layer of the multicast encapsulation protocol to the content according to the multicast encapsulation protocol identified in the subscription message;

wherein the multicast encapsulation protocol identified in the subscription message enables removing the at least one layer of the multicast encapsulation protocol to obtain the content playable with a player at the machines of the subscribing end-users.

14. The system of claim 13, wherein the UTP broadcaster is further configured to receive the content from the content provider, transform the content into UDP streams, and encapsulate the UDP streams within CDMP packets.

15. The system of claim 13, further comprising a scheduling system configured to schedule the start-time for multicasting the encapsulated content across the network.

16. The system of claim 15, wherein the start-time is scheduled in view of a required bandwidth of the content.

17. The system of claim 13, wherein the network administrator comprises a channel management center, and wherein the content provider comprises a channel editing center.

18. The system of claim 13, wherein the UTP broadcaster has a prescribed IP address setting and a prescribed port setting, and wherein the UTP broadcaster is configured to receive the content from the content provider at the prescribed IP address and at the prescribed port.

19. The system of claim 13, wherein the configured content includes a plurality of media objects selected from the group consisting of data files, streaming audio, and streaming video.

20. The system of claim 13, wherein the network administrator further comprises a channel management center kernel configured to manage broadcast requests received from the content provider and to communicate the broadcasts to subscribing end-users using the broadcast guide broadcaster.

21. The system of claim 13, wherein individual machines of the subscribing end-users have a multicast-ready interface and a player, and wherein the machines are connectable to the network, and wherein the multicast-ready interface is configured to receive CDMP streams and to output streams that are compatible to the player.

22. The system of claim 21, wherein the machines have one or more players, and wherein the UTP broadcaster is configured to multicast the encapsulated content across the network to the subscribing end-users.

23. The system of claim 21, wherein the multicast-ready interface includes a graphical user interface configured to display the transmitted announcement from the broadcast guide broadcaster.

24. The system of claim 23, wherein the transmitted announcement is displayed in the graphical user interface according to a broadcast channel on which the encapsulated content is to be multicast across the network.

25. The system of claim 23, wherein the multicast-ready interface includes a filter configured to display the transmitted announcement as a function of a subscribing end-user.

26. The system of claim 25, wherein the filter is further configured to operate based on the subscription information.

27. The system of claim 23, wherein the graphical user interface is further configured to permit a particular subscribing end-user to select one or more multicasts of encapsulated content using an input device connected to that end-user'"'"'s machine.

28. The system of claim 13, further comprising a multicast-ready interface configured to use the control information provided by the broadcast guide broadcaster to selectively permit reception of the encapsulated content multicast by the UTP broadcaster.

29. The system of claim 28, wherein the multicast-ready interface is further configured to transform the encapsulated content in the multicast into a format compatible with a player, the transformation being made by removing the encapsulation applied by the UTP broadcaster.

30. The system of claim 13, wherein the UTP broadcaster is configured to multiplex the encapsulated content prior to multicasting across the network.

31. A computer-implemented method for receiving content across a network, the content being configured into a digital format compatible with a player that operates on a particular machine connectable to the network, comprising:

subscribing to a broadcast session of the content deliverable via the network, the broadcast session having a start time;

prior to the start time, receiving a subscription message via the network, the subscription message including at least the start time and an a multicast encapsulation protocol to be used for the broadcast session;

receiving content of the broadcast session multicast from the network based on the start time, the content having at least one layer of the multicast encapsulation protocol;

removing the at least one layer of the multicast encapsulation protocol from the received content according to the multicast encapsulation protocol included in the subscription message received prior to the start time; and

after the at least one layer of the multicast encapsulation protocol is removed, playing the content with the player on the machine connectable to the network.

32. The method of claim 31, wherein the subscription message further comprises encryption information, and wherein the method further comprises decrypting the received content according to the encryption information included in the subscription message.

33. The method of claim 31, further comprising receiving a broadcast schedule from the network, and wherein subscribing to a broadcast session comprises subscribing to a broadcast session listed in the broadcast schedule.

34. The method of claim 31, further comprising determining whether the received content belongs to the subscribed broadcast session and whether the broadcast session is enabled.

35. The method of claim 34, wherein determining whether the received content belongs to the subscribed broadcast session comprises determining whether the multicast encapsulation protocol in the subscription message is suitable to unencapsulate the received content.

36. The method of claim 31, wherein the subscription message further comprises a time stamp, and the method further comprises deleting the subscription message after a time period based on the time stamp, thereby disabling removing the at least one layer of the multicast encapsulation protocol from the received content according to the multicast encapsulation protocol included in the deleted subscription message.

37. The method of claim 31, further comprising receiving a disable-service message and stopping receiving the content from the network.

38. The method of claim 31, wherein removing the at least one layer ofthe multicast encapsulation protocol comprises converting a multicast packet into a unicast packet.

39. A computer-implemented system for receiving content from a network, the content being configured into a digital format compatible with a player that operates on a particular machine connectable to the network, comprising a computer-storage medium containing instructions that cause a processor to perform a process comprising:

subscribing to a broadcast session of the content deliverable via the network, the broadcast session having a start time;

receiving a subscription message via the network prior to the start time of the broadcast session, the subscription message including at least the start time and a multicast encapsulation protocol to be used for the broadcast session;

receiving content of the broadcast session multicast from the network based on the start time, the content having at least one layer of the multicast encapsulation protocol; and

removing the at least one layer of the multicast encapsulation protocol from the received content according to the multicast encapsulation protocol included in the subscription message received prior to the start time; and

after the at least one layer of the multicast encapsulation protocol is removed, playing the content with the player on the machine connectable to the network.

40. The system of claim 39, wherein the subscription message further comprises encryption information, and wherein the process performed by the processor further comprises decrypting the received content according to the encryption information included in the subscription message.

41. The system of claim 39, wherein the process performed by the processor further comprises receiving a broadcast schedule from the network and subscribing to a broadcast session listed in the broadcast schedule.

42. The system of claim 39, wherein the process performed by the processor further comprises determining whether the received content belongs to the subscribed broadcast session and whether the broadcast session is enabled.

43. The system of claim 39, wherein the process performed by the processor further comprises determining whether the multicast encapsulation protocol in the subscription message is suitable to unencapsulate the received content.

44. The system of claim 39, wherein the subscription message further comprises a time stamp, and wherein the process performed by the processor further comprises deleting the subscription message after a time period based on the time stamp, thereby disabling removing the at least one layer of the multicast encapsulation protocol from the received content according to the multicast encapsulation protocol included in the deleted subscription message.

45. The system of claim 39, wherein the process performed by the processor further comprises receiving a disable-service message and stopping receiving the content from the network.

46. A computer-implemented system for providing content via a network, the content being configured into a digital format compatible with a player that operates on a particular machine connectable to the network, comprising a computer-storage medium containing instructions that cause a processor to perform a method comprising:

receiving subscription information to a broadcast session of the content from subscribing machines;

sending a subscription message via the network prior to a start time of the broadcast session to at least one of the subscribing machines, the subscription message including at least the start time and a multicast encapsulation protocol to be used for the broadcast session;

encapsulating content of the broadcast session according to the multicast encapsulation protocol, the encapsulated content having at least one layer of the multicast encapsulation protocol; and

broadcasting the encapsulated content via the network to the at least one subscribing machine based on the start time, wherein the multicast encapsulation protocol in the subscription message permits removing the at least one layer of the multicast encapsulation protocol from received content to enable playing the content with the player at the at least one subscribing machine.

47. The system of claim 46, wherein the method performed by the processor further comprises receiving the content from a content provider, transforming the content into UDP streams, and encapsulating the UDP streams within CDMP packets.

48. The system of claim 46, wherein the method performed by the processor further comprises scheduling the start-time for broadcasting the encapsulated content and providing the scheduled start-time to the at least one subscribing machine.

49. The system of claim 46, wherein the method performed by the processor further comprises accepting a subscription request from the at least one subscribing machine and sending the subscription message via the network according to the accepted subscription request.

50. The system of claim 46, wherein the method performed by the processor further comprises sending a subscription message including a time stamp that causes the subscription message to be deleted at the at least one subscribing machine after a time period based on the time stamp.

51. The system of claim 46, wherein the method performed by the processor further comprises altering the start time to disable reception by the at least one subscribing machine.

52. The system of claim 46, wherein the method performed by the processor comprises sending a subscription message via the network prior to the start time of the broadcast session to the at least one subscribing machine, the subscription message including at least the start time, the multicast encapsulation protocol, and encryption information, and wherein the process performed by the processor further comprises modifying the encryption information to disable reception by the at least one subscribing machine.

53. A computer-implemented method for providing content via a network, the content being configured into a digital format compatible with a player that operates on a particular machine connectable to the network, comprising:

receiving subscription information to a broadcast session of the content from subscribing machines;

sending a subscription message via the network prior to a start time of the broadcast session to at least one of the subscribing machines, the subscription message including at least the start time and a multicast encapsulation protocol to be used for the broadcast session;

encapsulating content of the broadcast session according to the multicast encapsulation protocol, the encapsulated content having at least one layer of the multicast encapsulation protocol; and

broadcasting the encapsulated content via the network to the at least one subscribing machine based on the start time, wherein the multicast encapsulation protocol in the subscription message permits removing the at least one layer of the multicast encapsulation protocol from received content to enable playing the content with the player at the at least one subscribing machine.

54. The method of claim 53, further comprising receiving the content from a content provider, transforming the content into UDP streams, and encapsulating the UDP streams within CDMP packets.

55. The method of claim 53, further comprising scheduling the start-time for broadcasting the encapsulated content and providing the scheduled start-time to the at least one subscribing machine.

56. The method of claim 53, further comprising accepting a subscription request from the at least one subscribing machine and sending the subscription message via the network according to the accepted subscription request.

57. The method of claim 53, further comprising sending a subscription message including a time stamp that causes the subscription message to be deleted at the at least one subscribing machine after a time period based on the time stamp.

58. The method of claim 53, further comprising altering the start time to disable reception by the at least one subscribing machine.

59. The method of claim 53, wherein sending a subscription message comprises sending a subscription message via the network prior to the start time of the broadcast session to the at least one subscribing machine, the subscription message including at least the start time, the multicast encapsulation protocol, and encryption information, and wherein the method further comprises modifying the encryption information to disable reception by the at least one subscribing machine.