Event driven filter monitoring for IP multicast services

• US 20050120378A1
• Filed: 08/23/2002
• Published: 06/02/2005
• Est. Priority Date: 11/28/2001
• Status: Active Grant

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Nokia Corporation
• Inventors: Jalonen, Esa
• Granted Patent: US 7,512,084 B2
• Time in Patent Office: Days
• US Class Current: 725/97
• CPC Class Codes: H04H 60/37 for identifying segments of broadcast information, e.g. scenes or extracting programme ID
• CPC Class Codes: H04H 60/85 which are mobile communication networks
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 12/185 with management of multicast group membership
• CPC Class Codes: H04L 12/1877 Measures taken prior to transmission
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 61/5069 for group communication, multicast communication or broadcast communication
• 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 69/162 involving adaptations of sockets based mechanisms secure socket layer H04L63/168
• CPC Class Codes: H04L 69/165 Combined use of TCP and UDP protocols; selection criteria therefor
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/434 Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/44209 Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896
• CPC Class Codes: H04N 21/6112 involving terrestrial transmission, e.g. DVB-T
• CPC Class Codes: H04N 21/6405 Multicasting data broadcast and multicast in packet switching networks H04L12/18
• CPC Class Codes: H04N 21/64322 IP

Abstract

Event driven methods for implementing or removing a filter used in receiving a multicast transmission are disclosed. An exemplary method for implementing a filter includes: detecting a message, such as an IPv6 MLD message, wherein the message comprises an address of a multicast group and a request to join the multicast group to receive a multicast transmission; in response to detecting the message, determining a filter parameter (e.g., a PID number and/or MAC address) needed to receive the multicast transmission; and implementing the filter parameter to receive the multicast transmission. Alternative methods wherein filter implementation or removal is based on the detection of direct procedure calls, such as a Setsockopt call, are also disclosed.

Claims

1. A method for implementing a filter for use in receiving a multicast transmission, comprising:

detecting a message, wherein the message comprises an address of a multicast group and a request to join the multicast group to receive a multicast transmission;

in response to detecting the message, determining a filter parameter needed to receive the multicast transmission; and

implementing the filter parameter to receive the multicast transmission.

2. The method of claim 1 wherein the message is a Multicast Listener Device (MLD) message.

3. The method of claim 2 wherein the MLD message is a Report message.

4. The method of claim 1 wherein the message is detected by a Next Header value of 58 in an immediately preceding header.

5. The method of claim 1 wherein the message is generated by a client application.

6. The method of claim 1 wherein the request to join a multicast group comprises information in a type field of the message.

7. The method of claim 6 wherein the information is a decimal 131.

8. The method of claim 1 wherein determining a filter parameter needed to receive the multicast transmission includes querying a storage device for a filter parameter needed to receive the multicast transmission.

9. The method of claim 8 wherein the storage device is a service information data base.

10. The method of claim 1 wherein implementing the filter parameter includes sending a request to a receiver to implement the filter parameter.

11. The method of claim 10 wherein the receiver is a digital video broadcasting—

terrestrial (DVB-T) receiver.

12. The method of claim 10 wherein sending a request to the receiver to implement the filter parameter includes sending the filter parameter.

13. The method of claim 1 wherein the method is implemented in a wireless hand-held terminal.

14. The method of claim 1 wherein the filter parameter comprises a program identifier (PID) number and a media access control (MAC) address.

15. A method for removing a filter used in receiving a multicast transmission, comprising:

detecting a message, wherein the message comprises an address of a multicast group and a request to leave the multicast group;

in response to detecting the message, determining a filter parameter needed to receive the multicast transmission; and

removing the filter parameter.

16. The method of claim 15 wherein the message is a Multicast Listener Device (MLD) message.

17. The method of claim 16 wherein the MLD message is a Done message.

18. The method of claim 15 wherein the message is detected by a Next Header value of 58 in an immediately preceding header.

19. The method of claim 16 wherein the MLD message is generated by a client application.

20. The method of claim 15 wherein the request to leave a multicast group comprises information in a message type field.

21. The method of claim 20 wherein the information is a decimal 132.

22. The method of claim 15 wherein determining a filter parameter needed to receive the multicast transmission includes querying a storage device for a filter parameter needed to receive the multicast transmission

23. The method of claim 15 wherein the storage device is a service information data base.

24. The method of claim 15 wherein removing the filter parameter comprises sending a request to a receiver to remove the filter parameter.

25. The method of claim 24 wherein sending a request to a receiver to remove the filter parameter includes sending the filter parameter.

26. The method of claim 24 wherein the receiver is a digital video broadcasting—

terrestrial (DVB-T) receiver.

27. The method of claim 15 wherein the method is implemented in a wireless hand-held terminal.

28. The method of claim 15 wherein the filter parameter comprises a program identifier (PID) number and a media access control (MAC) address.

29. A method for implementing a filter for use in receiving a multicast transmission, comprising:

detecting a direct procedure call, wherein the direct procedure call comprises an address of a multicast group and a request to join the multicast group to receive a multicast transmission;

in response to detecting the direct procedure call, determining a filter parameter needed to receive the multicast transmission; and

implementing the filter parameter to receive the multicast transmission.

30. The method of claim 29 wherein the direct procedure call is a setsockopt call.

31. The method of claim 29 wherein the direct procedure call is generated by a client application.

32. The method of claim 29 wherein determining a filter parameter needed to receive the multicast transmission includes querying a storage device for a filter parameter needed to receive the multicast transmission

33. The method of claim 32 wherein the storage device is a service information data base.

34. The method of claim 29 wherein implementing the filter parameter comprises sending a request to a receiver to implement the filter parameter.

35. The method of claim 34 wherein the receiver is a digital video broadcasting—

terrestrial (DVB-T) receiver.

36. The method of claim 34 wherein sending a request to the receiver to implement the filter parameter includes sending the filter parameter.

37. The method of claim 29 wherein the method is implemented in a wireless hand-held terminal.

38. The method of claim 29 wherein the filter parameter comprises a program identifier (PID) number and a media access control (MAC) address.

40. A method for removing a filter used in receiving a multicast transmission, comprising:

detecting a direct procedure call, wherein the direct procedure call comprises an address of a multicast group and a request to leave the multicast group;

in response to detecting the direct procedure call, determining a filter parameter needed to receive the multicast transmission; and

removing the filter parameter.

41. The method of claim 40 wherein the direct procedure call is a setsockopt call.

42. The method of claim 40 wherein the direct procedure call is generated by a client application.

43. The method of claim 40 wherein determining a filter parameter needed to receive the multicast transmission includes querying a storage device for a filter parameter needed to receive the multicast transmission

44. The method of claim 43 wherein the storage device is a service information data base.

45. The method of claim 40 wherein removing the filter parameter comprises sending a request to a receiver to remove the filter parameter.

46. The method of claim 45 wherein the receiver is a digital video broadcasting—

terrestrial (DVB-T) receiver.

47. The method of claim 45 wherein the request to the receiver to remove the filter parameter includes the filter parameter.

48. The method of claim 40 wherein the method is implemented in a wireless hand-held terminal.

49. The method of claim 40 wherein the filter parameter comprises a program identifier (PID) number and a media access control (MAC) address.

50. A terminal wherein a filter is implemented for use in receiving a multicast transmission, comprising:

a memory device for storing a program; and

a processor in communication with the memory device, the processor operative with the program to;

detect a message, wherein the message comprises an address of a multicast group and a request to join the multicast group to receive a multicast transmission;

in response to message detection, determine a filter parameter needed to receive the multicast transmission; and

implement the filter parameter to receive the multicast transmission.

51. The terminal of claim 50 wherein the terminal is a wireless hand-held terminal.

52. The terminal of claim 50 wherein the message is a Multicast Listener Device (MLD) message.

53. The terminal of claim 52 wherein the MLD message is a Report message.

54. The terminal of claim 50 wherein implementing the filter parameter includes sending a request to a receiver to implement the filter parameter.

55. The terminal of claim 54 wherein the receiver is a digital video broadcasting—

terrestrial (DVB-T) receiver.

56. The terminal of claim 50 wherein the filter parameter comprises a program identifier (PID) number and a media access control (MAC) address.

57. A terminal wherein a filter used in receiving a multicast transmission is removed, comprising:

a memory device for storing a program; and

a processor in communication with the memory device, the processor operative with the program to;

detect a message, wherein the message comprises an address of a multicast group and a request to leave the multicast group;

in response to message detection, determine a filter parameter needed to receive the multicast transmission; and

remove the filter parameter.

58. The terminal of claim 57 wherein the terminal is a wireless hand-held terminal.

59. The terminal of claim 57 wherein the message is a Multicast Listener Device (MLD) message.

60. The terminal of claim 59 wherein the MLD message is a Done message.

61. The terminal of claim 57 wherein removing the filter parameter comprises sending a request to a receiver to remove the filter parameter.

62. The terminal of claim 61 wherein sending a request to a receiver to remove the filter parameter includes sending the filter parameter.

63. The terminal of claim 62 wherein the receiver is a digital video broadcasting—

terrestrial (DVB-T) receiver.

64. The terminal of claim 57 wherein the filter parameter comprises a program identifier (PID) number and a media access control (MAC) address.

65. A terminal wherein a filter is implemented for use in receiving a multicast transmission, comprising:

a memory device for storing a program; and

a processor in communication with the memory device, the processor operative with the program to;

detect a direct procedure call, wherein the direct procedure call comprises an address of a multicast group and a request to join the multicast group to receive a multicast transmission;

in response to detecting the direct procedure call, determine a filter parameter needed to receive the multicast transmission; and

implement the filter parameter to receive the multicast transmission.

66. The terminal of claim 65 wherein the terminal is a wireless hand-held terminal.

67. The terminal of claim 65 wherein the direct procedure call is a setsockopt call.

68. The terminal of claim 65 wherein implementing the filter parameter comprises sending a request to a receiver to implement the filter parameter.

69. The terminal of claim 68 wherein the receiver is a digital video broadcasting—

terrestrial (DVB-T) receiver.

70. The terminal of claim 65 wherein the filter parameter comprises a program identifier (PID) number and a media access control (MAC) address.

71. A terminal wherein a filter used in receiving a multicast transmission is removed, comprising:

a memory device for storing a program; and

a processor in communication with the memory device, the processor operative with the program to;

detect a direct procedure call, wherein the direct procedure call comprises an address of a multicast group and a request to leave the multicast group;

in response to detecting the direct procedure call, determine a filter parameter needed to receive the multicast transmission; and

remove the filter parameter.

72. The terminal of claim 71 wherein the terminal is a wireless hand-held terminal.

73. The terminal of claim 71 wherein the direct procedure call is a setsockopt call.

74. The terminal of claim 71 wherein removing the filter parameter comprises sending a request to a receiver to remove the filter parameter.

75. The terminal of claim 74 wherein the receiver is a digital video broadcasting—

terrestrial (DVB-T) receiver.

76. The terminal of claim 71 wherein the filter parameter comprises a program identifier (PID) number and a media access control (MAC) address.