Method and system for managing objects distributed in a network

• US 7,797,440 B2
• Filed: 03/09/2005
• Issued: 09/14/2010
• Est. Priority Date: 03/09/2005
• Status: Active Grant

• Current Assignee: NBC Universal Media LLC (Comcast Corporation)
• Original Assignee: Vudu Incorporated (Comcast Corporation)
• Inventors: Ganesan, Prasanna, Rossmann, Alain, Miranz, Tony, Matloub, Shahriyar
• Primary Examiner(s): Srivastava; Vivek
• Assistant Examiner(s): MIRZA, ADNAN M
• Application Number:
  US11/076,343
• Publication Number:
  US 20060206609A1
• Time in Patent Office: 2,015 Days
• Field of Search: 709/203, 709/204, 709/212, 709/213, 709/214, 709/231
• US Class Current: 709/231
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]

Abstract

Various techniques for a library with a significant number of titles are disclosed. A user may select and order a title whenever desired and play back the title fairly instantly. The library is dynamically updated in accordance with a schedule. According to one aspect of the techniques, whenever an ordered title is played back, a beginning portion of the data pertaining to the title is activated to be played back first. The beginning portion of the data is locally cached while the remaining portion of the data is supplied by other designated devices. To facilitate the management of the remaining portion of data for each of the titles in the library, the titles are partitioned into a number of groups or bands. The amount of the remaining portion of the data to be locally cached for each title is determined by a band the title belongs to. Further, as new titles are added in, the titles in each band are updated by retiring relatively unpopular titles to a lower band.

Claims

1. A system for managing objects distributed in a network, the system comprising:

a plurality of devices coupled to the network, each of the plurality of devices including a storage element for storing data segments pertaining to a plurality of media content which may be requested for playback by the device, wherein the plurality of media content is differentiated according to two or more popularity bands, each of the plurality of media content being assigned to one of the popularity bands based on at least one of;

(i) a popularity of the media content, or (ii) a newness of the media content;

a server coupled to the network to provide, for storage in a first device of the plurality of devices, one or more of a first plurality of data segments, pertaining to a first media content of the plurality of media content, to enable the first device to initiate playback of the first media content using;

(i) the one or more stored data segments, and (ii) a remaining one or more of the first plurality of data segments as provided, at least in part, by other devices in the plurality of devices, wherein the number of data segments, of the first plurality of data segments, to be provided for storage is selectively determined based, at least in part, on the popularity band associated with the first media content; and

wherein the server is configured to provide the one or more data segments to the first device prior to receiving a request for playback of the first media content from the first device;

wherein the server is configured to provide, for storage in the first device, a greater percentage of data segments of the first plurality of data segments, than a percentage of data segments provided of the second plurality of data segments; and

wherein the first media content is reassigned to the second band if the popularity of newness of the first media content drops below a threshold level.

2. The system of claim 1, wherein the first plurality of data segments includes at least a header segment and a plurality of tail segments, the header segment corresponding to a beginning portion of the first media content and the plurality of tail segments collectively corresponding to the remaining portion of the first media content.

3. The system of claim 2, wherein the first plurality of data segments comprises a collection of data together with any auxiliary data, if there is such auxiliary data.

4. The system of claim 2, wherein the header segment includes a plurality of consecutive data blocks, and wherein each of the tail segments includes a plurality of nonconsecutive data blocks.

5. The system of claim 1, wherein the two or more popularity bands include at least a first band and a second band, and wherein media content associated with the first band is more popular or newer than media content associated with the second band.

6. The system of claim 1, wherein the server is further configured to provide data segments pertaining to the first media content to each of the plurality of devices, and wherein the server is configured to provide data segments pertaining to the second media content to some, but not all, of the plurality of devices.

7. The system of claim 1, wherein the number of data segments of the first plurality of data segments provided for storage in the first device depends, at least in part, on a viewing behavior of a user of the first device.

8. The system of claim 7, wherein the viewing behavior comprises at least one of:

(i) a previous request for playback, (ii) a user rating, (iii) a designation for future playback, or (iv) a browsing history associated with one or more of the plurality of media content.

9. The system of claim 1, wherein the first media content is reassigned to the second band as a result of:

(i) a third media content being newly added to the plurality of media content, or (ii) the popularity of another media content surpassing the popularity of the first media content.

10. The system of claim 1, wherein the server is configured to selectively determine which data segments, of the first plurality of data segments, are to be stored in each of the plurality of devices based on one or more of:

(i) a time zone, (ii) a geographical location, (iii) a network bandwidth, (iv) user demographics, or (v) a network latency associated with each of the plurality of devices.

11. The system of claim 1, wherein the first media content is associated with the first band, and wherein the second media content is associated with the second band.

12. The system of claim 1, wherein the first device is configured to provide a copy of one or more of the first plurality of data segments for storage in one or more devices, of the plurality of devices.

13. The system of claim 12, wherein the first device is configured to provide the copy of the one or more of the first plurality of data segments to the one or more devices prior to receiving a request for playback of the first media content from any of the one or more devices.