System and method with policy control function for multimedia broadcast/multicast system services

• US 7,391,724 B2
• Filed: 05/16/2003
• Issued: 06/24/2008
• Est. Priority Date: 10/09/2002
• Status: Active Grant

• Current Assignee: Crystal Mountain Communications, LLC (Ascend Innovation Management, LLC)
• Original Assignee: Spyder Navigations LLC (Intellectual Ventures LLC)
• Inventors: Hurtta, Tuija, Sarja, Jorma, Gateva, Ralitsa, Alakoski, Timo
• Primary Examiner(s): Kizou; Hassan
• Assistant Examiner(s): Rutkowski; Jeffrey M
• Application Number:
  US10/438,812
• Publication Number:
  US 20040073928A1
• Time in Patent Office: 1,866 Days
• Field of Search: 370/230
• US Class Current: 370/230
• CPC Class Codes: H04L 12/1886 with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
• 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 63/10 for controlling access to devices or network resources
• CPC Class Codes: H04L 63/20 for managing network security; network security policies in general filtering policies H04L63/0227
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 84/04 Large scale networks; Deep hierarchical networks

Abstract

A system and method with policy control function (PCF) for multimedia broadcast/multicast system (MBMS) services that includes a core network, one or more application servers, and one or more policy control functions (PCF). In one embodiment, the core network includes one or more gateway GPRS support nodes (GGSN). One of the application servers provides a MBMS service. At least one policy control function is operatively connected between each GGSN and application server. MBMS session request information is sent from the MBMS service server to the policy control function. The policy control function provides authorization information for a MBMS session to the GGSN.

Claims

1. A method for providing a policy control function for multimedia broadcast/multicast system (MBMS) service in a communications network, comprising:

receiving a request message for a broadcast/multicast system service at a policy control function;

exchanging messages between the policy control function and a subscription management function to obtain access control;

sending a message from the policy control function to a MBMS service management function to request service attributes;

providing the service attributes from the MBMS service management function to the policy control function; and

sending a decision message from the policy control function containing a decision for the broadcast/multicast system service request.

2. The method according to claim 1, further comprising receiving the request message for the broadcast/multicast system service at the policy control function from a gateway general packet radio service (GPRS) support node (GGSN).

3. The method according to claim 1, further comprising performing a service function to authenticate a mobile device, the mobile device sending the request message for the broadcast/multicast system service.

4. The method according to claim 1, wherein the request message includes an Internet Protocol Multimedia System identifier (IMSI) and an Internet Protocol (IP) multicast address.

5. The method according to claim 1, further comprising joining a MBMS session by a mobile device before the receiving of the request message for the broadcast/multicast system service, the request message being in response to the joining.

6. The method according to claim 1, wherein the decision message comprises Quality of Service (QoS) information for the broadcast/multicast system service.

7. The method according to claim 1, the decision message comprising authorization for the broadcast/multicast system service.

8. A method for providing a policy control function for multimedia broadcast/multicast system (MBMS) service in a communications network, comprising:

receiving service attribute information from a MBMS service management function;

storing said service attribute information in a policy control function (PCF);

receiving a request message for a broadcast/multicast system service at the PCF;

exchanging messages between the PCF and a subscription management function to obtain access control information; and

sending a decision message from the PCF containing a decision for the broadcast/multicast system service request.

9. The method according to claim 8, further comprising receiving the request message for the broadcast/multicast system service at the policy control function from a gateway general packet radio service (GPRS) support node (GGSN).

10. The method according to claim 8, further comprising performing a service function to authenticate a mobile device, the mobile device sending the request message for the broadcast/multicast system service.

11. The method according to claim 8, wherein the request message includes an Internet Protocol Multimedia System identifier (IMSI) and an Internet Protocol (IP) multicast address.

12. The method according to claim 8, further comprising joining a MBMS session by a mobile device before the receiving of the request message for the broadcast/multicast system service, the request message being in response to the joining.

13. The method according to claim 8, wherein the decision message comprises Quality of Service (QoS) information for the broadcast/multicast system service.

14. The method according to claim 8, the decision message comprising authorization for the broadcast/multicast system service.

15. A method for providing a policy control function for multimedia broadcast/multicast system (MBMS) service in a communications network, comprising:

receiving a first packet of a MBMS service at a gateway general packet radio service (GPRS) support node (GGSN) from an application server;

receiving a request message for the MBMS service at a policy control function;

sending a message to request service attributes from the policy control function to a MBMS service management function;

providing the service attributes from the MBMS service management function to the policy control function; and

sending a decision message from the policy control function containing a decision for the MBMS service request.

16. The method according to claim 15, further comprising receiving the request message for MBMS service at the policy control function from the GGSN.

17. The method according to claim 15, further comprising performing a service function to authenticate a mobile device, the mobile device sending the request message for the MBMS service.

18. The method according to claim 15, wherein the request message includes an Internet Protocol Multimedia System identifier (IMSI) and an Internet Protocol (IP) multicast address.

19. The method according to claim 15, further comprising joining a MBMS session by a mobile device before the receiving of the request message for the MBMS service, the request message being in response to the joining.

20. The method according to claim 15, wherein the decision message comprises Quality of Service (QoS) information for the MBMS service.

21. The method according to claim 15, the decision message comprising authorization for the MBMS service.

22. A method for providing a policy control function for multimedia broadcast/multicast system (MBMS) service in a communications network, comprising:

receiving, at a policy control function, service attribute information from a MBMS service management function;

storing the service attribute information at the policy control function;

receiving a first packet of a MBMS service at a gateway general packet radio service;

(GPRS) support node (GGSN);

receiving a request message for the MBMS service at said policy control function; and

sending a decision message from the policy control function containing a decision for the MBMS service request.

23. The method according to claim 22, further comprising receiving the request message for the MBMS service at the policy control function from the GGSN.

24. The method according to claim 22, further comprising performing a service function to authenticate a mobile device, the mobile device sending the request message for the MBMS service.

25. The method according to claim 22, wherein the request message includes an Internet Protocol Multimedia System identifier (IMSI) and an Internet Protocol (IP) multicast address.

26. The method according to claim 22, further comprising joining a MBMS session by a mobile device before the receiving of the request message for the MBMS service, the request message being in response to the joining.

27. The method according to claim 22, wherein the decision message comprises Quality of Service (QoS) information for the MBMS service.

28. The method according to claim 22, the decision message comprising authorization for the MBMS service.

29. A communications system comprising:

a core network, the core network including a gateway general packet radio service (GPRS) support node (GGSN);

an application server configured to provide a multimedia multicast/broadcast system (MBMS) service; and

a policy control function (PCF) operatively connected between the GGSN and the application server,

wherein MBMS session request information is sent from the application server providing the MBMS service to the policy control function, the policy control function providing authorization information for a MBMS session to the GGSN.

30. The system according to claim 29, further comprising a serving GPRS support node (SGSN) and a mobile device, the SGSN receiving a request to register the mobile device to the MBMS session, the SGSN sending an authorization request to the GGSN to authorize the mobile device for the MBMS session.

31. The system according to claim 29, further comprising an IP multimedia subsystem (IMS), wherein the policy control function is operatively connected between the GGSN and the IMS.

32. The system according to claim 31, wherein the IMS further comprises a proxy call state service control function (P-CSCF), wherein the PCF is operatively connected to the P-CSCF.

33. The system according to claim 32, wherein the policy control function is operatively connected to the P-CSCF using a Gq interface.

34. The system according to claim 29, wherein the policy control function is operatively connected to the GGSN using a Go interface.

35. The system according to claim 29, wherein the policy control function is operatively connected to the GGSN using a Gi interface.

36. The system according to claim 29, wherein the policy control function is operatively connected to the application server using a Gq interface.

37. The system according to claim 29, wherein the authorization information comprises at least one of an authorized Quality of Service (QoS), packet filtering, and service area.

38. The system according to claim 29, wherein the MBMS session request information is sent from the application server providing the MBMS service to the policy control function in response to one of a mobile device attempting to join the MBMS session and a first packet of an MBMS media flow arriving at the GGSN from the application server providing the MBMS service.

39. The system according to claim 38, wherein the application server providing the MBMS service sends the first packet of an MBMS media flow to the GGSN using a Gi interface.

40. The system according to claim 29, further comprising a packet-switched streaming service (PSS) server, wherein at least one of session based (audio/video) components and non-session based (discrete media) components are transferred between the packet control function and the PSS server.

41. A method for activation of a multimedia multicast/broadcast system (MBMS) service comprising:

receiving a request message from a mobile device at a serving general packet radio service (GPRS) support node (SGSN) to register the mobile device to a multicast service;

verifying the mobile device is authorized to receive MBMS bearer data, the verifying being based on subscription data retrieved from a Home Location Register (HLR) by the SGSN;

sending a join request from the SGSN to a gateway GPRS support node (GGSN) to authorize the mobile device for the multicast service;

transferring access control information between the GGSN and a policy control function;

confirming authorization for the mobile device by the GGSN and sending a join response to the SGSN; and

sending an activate MBMS context accept to the mobile device by the SGSN.

42. The method according to claim 41, further comprising performing security functions to authenticate the mobile device.

43. The method according to claim 41, further comprising requesting service attributes by the GGSN from the policy control function if the mobile device is first to activate the multicast service.

44. The method according to claim 43, wherein the service attributes comprise at least one of Quality of Service (QoS) and multicast service area.

45. The method according to claim 41, wherein the access control information comprises at least one of an Internet Protocol Multimedia System identifier (IMSI) and an IP multicast address.

46. The method according to claim 45, further comprising joining an IP multicast for the IP multicast address by the GGSN to connect with a MBMS data source.

47. The method according to claim 41, further comprising creating the activate MBMS context by the GGSN based on the access control information if the mobile device is first to activate the multicast service.

48. A method for using policy control function (PCF) with multi-media broadcast/multicast system (MBMS) services comprising:

sending a start message from a broadcast/multicast service center (BM-SC) to a policy control function (PCF);

initiating a quality of service (QoS) authorization procedure;

sending a request by a gateway general packet radio service (GPRS) support node (GGSN) for the PCF to authorize resources for a service;

authorizing the resources by the PCF, the PCF sending a first message to the GGSN to transmit MBMS service attributes;

propagating the MBMS service attributes by the GGSN to other network nodes;

receiving an acknowledge message of the propagating at the GGSN, the GGSN sending a second message to the PCF;

confirming to the BM-SC by the PCF that the resources are allocated and active; and

sending broadcast service data packets by the BM-SC.

49. The method according to claim 48, wherein the start message includes a service identifier used with QoS authorization for the service.

50. The method according to claim 48, further comprising initiating the QoS authorization procedure by the PCF sending a COPS-PR (Common Open Policy Service-Policy Provisioning) decision message with a Request-State flag set.

51. The method according to claim 50, wherein a service identifier is included in the COPS-PR decision message to identify the service.

52. The method according to claim 50, further comprising the GGSN acknowledging the COPS-PR message by the GGSN sending a COPS-PR report state message.

53. The method according to claim 48, further comprising sending a service identifier by the GGSN to identify the service to the PCF.

54. The method according to claim 48, wherein the network nodes comprise at least one of a serving general packet radio service (GPRS) support node (SGSN) and a radio access node (RAN).

55. The method according to claim 48, wherein the first message comprises a COPS-PR decision message.

56. The method according to claim 48, wherein the second message comprises a COPS-PR report state message.

57. A method for controlling Quality of service (QoS) for MBMS by a PCF comprising:

sending a Session Start message by a broadcast/multicast service center (BM-SC) when the BM-SC is ready to send MBMS data;

determining, by a PCF, GGSN addresses specifying a MBMS service associated with the MBMS data; and

sending the Session Start message including QoS information, by the PCF, to all GGSNs whose address was determined.

58. The method according to claim 57, wherein the GGSN addresses include an IP multicast address and Access Point Name (APN) specifying the MBMS service associated with the MBMS data.

59. The method according to claim 58, further comprising receiving the IP multicast address and APN from the broadcast/multicast service center (BM-SC) by the PCF.

60. The method according to claim 58, wherein the IP multicast address and APN are pre-configured in the PCF.

61. The method according to claim 60, further comprising indicating a service key to identify the MBMS service by the broadcast/multicast service center (BM-SC), the PCF accessing the pre-configured IP multicast address and APN with the service key.

62. The method according to claim 57, further comprising receiving the QoS information from the broadcast/multicast service center (BM-SC) by the PCF.

63. The method according to claim 57, wherein the QoS information is pre-configured in the PCF.

64. The method according to claim 57, wherein the Session Start message includes information to identify the MBMS service.

65. The method according to claim 64, wherein the information to identify the MBMS service includes at least one of an IP multicast address, an Access Point Name (APN), and a service key.

66. A method for controlling QoS for MBMS by a PCF comprising:

creating an MBMS bearer context in a GGSN;

sending a notify message to a PCF by the GGSN notifying the PCF of the MBMS bearer context;

storing information to identify a MBMS service associated with the MBMS bearer context and a GGSN address and acknowledging the notify message, by the PCF;

sending a Session Start message by a BM-SC when the BM-SC is ready to send MBMS data;

determining, by the PCF, GGSN addresses of the GGSNs which notified the PCF when the MBMS bearer context was created; and

sending the Session Start message by the PCF to all GGSNs whose address was determined, the Session Start message including QoS information.

67. The method according to claim 66, wherein the notify message is a COPS Request message.

68. The method according to claim 66, wherein the notify message includes at least one of an IP multicast address, an APN, and a service key.

69. The method according to claim 66, wherein the information to identify the MBMS service comprises at least one of an IP multicast address, an APN, and a service key.

70. The method according to claim 66, further comprising sending a Notify Ack message from the PCF to the GGSN after receiving the Notify message.

71. The method according to claim 70, wherein the Notify Ack message comprises a COPS Decision message.

72. The method according to claim 66, wherein the GGSN addresses include at least one of an IP multicast address, an APN, and a service key.

73. The method according to claim 66, wherein the PCF receives at least one of an IP multicast address, an access point name (APN), and a service key from the broadcast/multicast service center (BM-SC) in the Session Start message.

74. The method according to claim 66, wherein the PCF receives the QoS information from the broadcast/multicast service center (BM-SC) in the Session Start message.

75. The message according to claim 66, wherein the QoS information is preconfigured in the PCF.

76. The method according to claim 66, wherein the Session Start message includes the information to identify the MBMS service.

77. The method according to claim 76, wherein the information to identify the MBMS service includes at least one of an IP multicast address, an APN, and a service key.