Policy control over switched delivery networks

• US 8,578,432 B2
• Filed: 12/07/2007
• Issued: 11/05/2013
• Est. Priority Date: 12/07/2007
• Status: Active Grant

• Current Assignee: Triton US VP Acquisition, Co.
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Vasudevan, Swaminatha, Liu, Xiaomei
• Primary Examiner(s): Parry, Chris
• Application Number:
  US11/952,969
• Publication Number:
  US 20090150943A1
• Time in Patent Office: 2,160 Days
• Field of Search: None
• US Class Current: 725/95
• CPC Class Codes: H04L 12/1886 with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
• CPC Class Codes: H04N 21/2385 Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• CPC Class Codes: H04N 21/2402 Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/6125 involving transmission via Internet transmission by internet of broadcast information H04H60/82
• CPC Class Codes: H04N 21/6405 Multicasting data broadcast and multicast in packet switching networks H04L12/18
• CPC Class Codes: H04N 21/6408 Unicasting

Abstract

A method is described that includes receiving a program request from a transceiver that includes a program request to receive a video program at the transceiver. The method also includes determining an amount of bandwidth on a channel available to the transceiver. The method further includes determining whether to provide a unicast stream or a multicast stream to deliver the requested video program to the transceiver in response to the program request based on a result obtained after implementing a policy control function that considers an amount of bandwidth on the channel to the transceiver. The method further includes formatting and selecting an incoming media stream in accordance with the result of the policy control function to provide a corresponding formatted unicast or multicast media stream that includes video data for the requested video program. The method further includes outputting the associated formatted unicast or multicast media stream on the channel.

Claims

1. A method comprising:

receiving by a network device a program request from a transceiver that includes a program request to receive a video program at the transceiver, wherein the transceiver is associated with a subscriber;

ascertaining by the network device an amount of bandwidth on a network channel available to the transceiver and all other transceivers being serviced by the network device via the network channel, the network device being connected to the network channel;

determining by the network device whether to provide a unicast stream or a multicast stream to deliver the requested video program to the transceiver in response to the program request based on a result obtained after implementing a policy control function that considers the amount of bandwidth on the network channel available to the transceiver and all other transceivers serviced by the network device via the network channel, capabilities of the transceiver, and a subscriber profile of the subscriber, wherein the transceiver and all other transceivers served by the network device via the network channel are directly connected to the network channel;

selecting a format and encoding type of a program offering of an incoming media stream by the network device in accordance with the capabilities of the transceiver and with the result of the policy control function to provide a corresponding formatted unicast or multicast media stream that includes video data for the requested video program; and

outputting by the network device the associated formatted unicast or multicast media stream on the network channel.

2. The method as recited in claim 1, wherein the policy control function is implemented by the network device at a distribution hub which provides program service via the network channel to the transceiver and to the other transceivers serviced by the network device via the network channel.

3. The method as recited in claim 2, wherein the program request further includes information that describes the associated subscriber, and wherein the policy control function utilizes the information describing the associated subscriber such that determining whether to provide a unicast stream or a multicast stream is performed based, at least in part, upon the information describing the associated subscriber.

4. The method as recited in claim 1, wherein the program request further includes information that describes the associated subscriber.

5. The method as recited in claim 1, wherein the policy control function utilizes information including one of:

a demographic profile of the associated subscriber, a level of income of the associated subscriber, or programs generally requested by the transceiver.

6. The method as recited in claim 1, wherein the policy control function utilizes information comprising:

an average rate of program requests sent by transceivers in a specified period of time.

7. The method as recited in claim 1, wherein the policy control function utilizes information including one of:

a resolution format of the program requested by the transceiver or available formats of the program requested by the transceiver.

8. The method as recited in claim 1, further comprising maximizing the number of unicast streams sent to transceivers while maintaining the amount of bandwidth on the network channel at a threshold level.

9. The method as recited in claim 1, wherein the policy control function utilizes information including one of:

a percentage of bandwidth used on the network channel that is allocated to switched unicast and multicast streams, or a percentage of bandwidth used on the network channel that is allocated solely to unicast streams.

10. The method as recited in claim 1, further comprising comparing the amount of bandwidth on the network channel to a threshold and

providing a unicast stream to the transceiver if the amount of bandwidth is less than the threshold, and

providing a multicast stream to the transceiver if the amount of bandwidth is greater than the threshold.

11. The method as recited in claim 1, further comprising determining the decoding capabilities of the transceiver and selecting a coding format for a unicast or multicast stream based on compression ratio.

12. The method as recited in claim 1, further comprising determining the resolution formats that the transceiver is able to decode and selecting a coding format for a unicast or multicast stream based on resolution.

13. The method as recited in claim 1, wherein the decision whether to provide a unicast stream or a multicast stream is made upon receipt of a program request.

14. The method as recited in claim 1, wherein the network channel is not dedicated to the transceiver.

15. The method as recited in claim 1, wherein the network channel has a limited bandwidth that is unrelated to capabilities of the transceiver.

16. The method as recited in claim 1, wherein the network device is a head end.

17. The method as recited in claim 1, wherein the subscriber profile indicates services to be provided to the subscriber.

18. The method as recited in claim 17, wherein the services include unicast or multicast.

19. The method as recited in claim 17, wherein the services and the format include high definition or standard definition.

20. The method as recited in claim 1, wherein the subscriber profile indicates a priority.

21. The method as recited in claim 20, wherein the priority pertains to personalization or delivery of unicast.

22. The method as recited in claim 1, wherein the format includes high definition or standard definition.

23. An apparatus comprising:

a first network interface configured to receive an incoming media stream that includes video data for a video program;

at least one processor configured to execute instructions encoded in one or more tangible media for execution and when executed operable to

examine a program request received from a transceiver that includes a program request to receive the video program at the transceiver, wherein the transceiver is associated with a subscriber;

determine an amount of bandwidth on a network channel available to the transceiver and all other transceivers serviced by the apparatus via the network channel, the apparatus being connected to the network channel;

determine whether to provide a unicast stream or a multicast stream to deliver the requested video program to the transceiver in response to the program request based on a result obtained after implementing a policy control function that considers the amount of bandwidth on the network channel, capabilities of the transceiver, and a subscriber profile of the subscriber, wherein the transceiver and all other transceivers served by the apparatus via the network channel are directly connected to the network channel; and

select a format and encoding type of a program offering of the incoming media stream in accordance with the capabilities of the transceiver and with the result of the policy control function to provide a corresponding formatted unicast or multicast media stream that includes video data for the video program; and

one or more network interfaces configured to receive the program request from the transceiver over the network channel, and output the associated formatted unicast or multicast media stream on the network channel.

24. The apparatus as recited in claim 23, wherein the apparatus is a network device at a distribution hub which provides program service to the transceiver and to the other transceivers serviced by the apparatus via the network channel, and wherein the program request further includes information that describes the transceiver and associated subscriber.

25. The apparatus as recited in claim 23, wherein the policy control function utilizes information including one of:

a demographic profile of the associated subscriber, a level of income of the associated subscriber, or programs generally requested by the transceiver.

26. The apparatus as recited in claim 23, wherein the policy control function utilizes information comprising:

an average rate of program requests sent by transceivers in a specified period of time.

27. The apparatus as recited in claim 23, wherein the policy control function utilizes information including one of:

a resolution format of the program requested by the transceiver or available formats of the program requested by the transceiver.

28. The apparatus as recited in claim 23, wherein the policy control function utilizes information including one of:

a percentage of a bandwidth used on the network channel that is allocated to switched unicast and multicast streams, or a percentage of a bandwidth used on the network channel that is allocated solely to unicast streams.

29. The apparatus as recited in claim 23 wherein the instructions for implementing the policy control function are in a policy control server in communication with the processor.

30. One or more non-transitory computer-readable media storing thereon computer-readable instructions operable to:

receive a program request by a network device from a transceiver that includes a program request to receive a video program at the transceiver, wherein the transceiver is associated with a subscriber;

determine by the network device an amount of bandwidth on a network channel available to the transceiver and all other transceivers serviced by the network device via the network channel, the network device being connected to the network channel; and

determine by the network device whether to provide a unicast stream or a multicast stream to deliver the requested video program to the transceiver in response to the program request based on a result obtained after implementing a policy control function that considers the amount of bandwidth on the network channel, capabilities of the transceiver, and a subscriber profile of the subscriber, wherein the transceiver and all other transceivers served by the network device via the network channel are directly connected to the network channel;

select a format and encoding type of a program offering of an incoming media stream by the network device in accordance with the capabilities of the transceiver and with the result of the policy control function to provide a corresponding formatted unicast or multicast media stream that includes video data for the requested video program; and

output the associated formatted unicast or multicast media stream by the network device on the network channel.