System and method for placement of servers in an internet protocol television network

• US 20070107025A1
• Filed: 11/10/2005
• Published: 05/10/2007
• Est. Priority Date: 11/10/2005
• Status: Abandoned Application

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Li, Zhi, Ou, Canhui, Savoor, Raghvendra, Bellford, Russell
• Application Number:
  US11/271,230
• Publication Number:
  US 20070107025A1
• Time in Patent Office: Days
• US Class Current: 725/97
• CPC Class Codes: H04H 20/78 CATV [Community Antenna Television] systems
• CPC Class Codes: H04L 12/1854 with non-centralised forwarding system, e.g. chaincast
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/0852 Delays
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04N 21/64738 Monitoring network characteristics, e.g. bandwidth, congestion level data switched network analysis H04L41/14; monitoring functioning in data switched networks H04L43/0817; flow control in packet networks H04L47/10

Abstract

According to one example embodiment the placement of video distribution servers and acquisition servers in a live television IPTV network is considered to be a separate process. This process may be based, for example, on historical data, number of subscribers, subscribers'"'"' service quality, some video distribution servers may be selectively placed closer to the subscribers, i.e., at some central offices or intermediate offices, instead of at the video hub office. These local video distribution servers (those video distribution servers not located at video hub office) may selectively receive popular TV channel streams just like regular video subscribers based on the multicasting protocol from the acquisition server. Whenever a subscriber wants to switch to a channel (or recover packet loss for an on-going channel), if the channel is on the popular channel list, the service may be accomplished by the local video distribution servers. Otherwise, the service will be provided by the remote video distribution servers (those placed together with acquisition servers). This approach may facilitate faster channel change and quick packet loss recovery, decreased traffic load on the service networks, and improvement in the subscribers video packets delivery performance.

Claims

1. A system comprising:

at least one subscriber system receiving a multicast data stream containing live television programming content from a first server positioned at a first location remote from the at least one subscriber system;

the at least one subscriber system further receiving a unicast data stream containing live television programming from a second server positioned at a second location remote from the at least one subscriber system; and

wherein the first location and the second location are different, and the second location is chosen at least in part to improve the performance of delivery of television programming to subscribers.

2. A system according to claim 1 further including a third server co-located with the first server.

3. A system according to claim 2 further including at least one additional server to distribute a unicast stream located at a third location remote from the at least one subscriber system and not co-located with either the first or second servers.

4. A system according to claim 2 wherein the second server is positioned in closer proximity to one or more of the subscribers serviced by the first server system than the third server.

5. A system according to claim 2 further wherein the second server is positioned in accordance with one or more rules related at least in part on the ability of the third server to deliver a television feed to the subscribers.

6. A method comprising:

configuring an initial state of an internet protocol television (IPTV) network having a plurality of video distribution servers used to deliver live programming in a unicast data stream;

determining at least some network activity of the initial state of the IPTV network; and

configuring the IPTV network to a secondary state by adding at least one video distribution server based on at least some of the determined network activity.

7. A method according to claim 6 further including:

establishing the initial state of the network by a) positioning a first server system to generate a multicast IP data stream carrying a video-on-demand feed to a first set of subscribers and b) positioning a second server system to generate a unicast video-on-demand IP data stream carrying a video-on-demand feed to one or more of the first set of subscribers.

8. A method according to claim 7 further wherein the first and second server systems are co-located in the initial state.

9. A method according to claim 7 further wherein the added at least one video server is positioned in accordance with one or more rules related at least in part on the ability of the second server to deliver a television feed to the subscribers.

10. A system comprising:

at least one subscriber system receiving a multicast data stream containing live television programming content from a first server positioned at a first location remote from the at least one subscriber system;

the at least one subscriber system further receiving a unicast data stream containing video-on-demand programming from a second server positioned at a second location remote from the at least one subscriber system; and

wherein the first location and the second location are different, and the second location is chosen at least in part to improve the performance of delivery of television programming to subscribers.

11. A system according to claim 10 further including a third server co-located with the first server.

12. A system according to claim 11 further including at least one additional server to distribute a unicast stream of video-on-demand programming located at a third location remote from the at least one subscriber system and not co-located with either the first or second servers.

13. A system according to claim 11 wherein the second server is positioned in closer proximity to one or more of the subscribers serviced by the first server system than the third server.

14. A system according to claim 11 further wherein the second server is positioned in accordance with one or more rules related at least in part on the ability of the third server to deliver a television feed to the subscribers.

15. A method comprising:

configuring an initial state of an internet protocol television (IPTV) network having at least one video-on-demand server used to deliver video-on-demand programming in a unicast data stream;

determining at least some network activity of the initial state of the IPTV network; and

configuring the IPTV network to a secondary state by adding at least one video-on-demand server based on at least some of the determined network activity.

16. A method according to claim 15 further including:

establishing the initial state of the network by a) positioning a first server system to generate a multicast IP data stream carrying a live television programming IP data stream to a first set of subscribers and b) positioning a second server system to generate a unicast video-on-demand IP data stream carrying a video-on-demand feed to one or more of the first set of subscribers.

17. A method according to claim 16 further wherein the first and second server systems are co-located in the initial state.

18. A method according to claim 16 further wherein the added at least one video-on-demand server is positioned in accordance with one or more rules related at least in part on the ability of the second server to deliver a television feed to the subscribers.