Method and apparatus for providing timeshift service in digital broadcasting system and system thereof

1. A system for providing content in a digital broadcasting system, the system comprising:

a server configured to:

generate a multimedia presentation description (MPD) including a first uniform resource location (URL) information indicating a location of a content provider providing the content and transmit the MPD to a client device;

if a segment of the content is transmitted from the content provider to a network storage after a lapse of a timeshift buffering time of the segment at the content provider and stored in the network storage, receive a second URL information indicating a location where the segment is stored in the network storage from the network storage, wherein the timeshift buffering time corresponds to a time in which a timeshift service for the segment is provided by the server;

generate an updated MPD including the second URL information; and

transmit the updated MPD to the client device,

wherein the client device is configured to:

receive the MPD and the updated MPD, and

acquire the segment stored in the network storage using the second URL information.

2. The system of claim 1 , wherein the updated MPD includes information about a time in which the segment was actually broadcasted.

3. The system of claim 1 , wherein the MPD is updated in at least one of units of the segment and units of a program formed by the segment.

4. The system of claim 1 , wherein the client device requests the server to transmit the updated MPD at a time when the updated MPD is generated.

5. A method for providing content by a server in a digital broadcasting system, the method comprising:

generating a multimedia presentation description (MPD) including a first uniform resource location (URL) information indicating a location of a content provider providing the content and transmitting the MPD to a client device;

receiving, if a segment of the content is transmitted from the content provider to a network storage after a lapse of a timeshift buffering time of the segment at the content provider and stored in the network storage, a second URL information indicating a location where the segment is stored in the network storage from the network storage, wherein the timeshift buffering time corresponds to a time in which a timeshift service for the segment is provided by the server;

generating an updated MPD including the second URL information; and

transmitting the updated MPD to the client device.

6. The method of claim 5 , wherein the updated MPD includes information about a time in which the segment was actually broadcasted.

7. The method of claim 5 , wherein the MPD is updated in at least one of units of the segment and units of a program formed by the segment.

8. The method of claim 5 , wherein the updated MPD is transmitted at a time when the updated MPD is generated, after a request for the updated MPD is received from the client device.

9. A server for providing content for digital broadcast, the server comprising:

a controller configured to execute one or more modules; and

a memory configured to store the one or more modules,

wherein the one or more modules is configured to:

generate a multimedia presentation description (MPD) including a first uniform resource location (URL) information indicating a location of a content provider providing the content,

transmit the MPD to a client device, if a segment of the content is transmitted from the content provider to a network storage after a lapse of a timeshift buffering time of the segment at the content provider and stored in the network storage, wherein the timeshift buffering time corresponds to a time in which a timeshift service for the segment is provided by the server,

receive a second URL information indicating a location where the segment is stored in the network storage from the network storage,

generate an updated MPD including the second URL information, and

transmit the updated MPD to the client device.

10. The server of claim 9 , wherein the updated MPD includes information about a time in which the segment was actually broadcasted.

11. The server of claim 9 , wherein the MPD is updated in at least one of units of the segment and units of a program formed by the segment.

12. The server of claim 9 , wherein the updated MPD is transmitted at a time when the updated MPD is generated, after a request for the updated MPD is received from the client device.

13. A method for acquiring content by a client device in a digital broadcasting system, the method comprising:

receiving, from a server, a multimedia presentation description (MPD) including a first uniform resource location (URL) information indicating a location of a content provider providing the content;

receiving an updated MPD from the server, wherein if a segment of the content is transmitted from the content provider to a network storage after a lapse of a timeshift buffering time of the segment at the content provider and stored in the network storage, the server receives a second URL information indicating a location where the segment is stored in the network storage from the network storage, and the updated MPD includes the second URL information, wherein the timeshift buffering time corresponds to a time in which a timeshift service for the segment is provided by the server; and

acquiring the segment stored in the network storage using the second URL information.

14. The method of claim 13 , wherein the updated MPD includes information about a time in which the segment was actually broadcasted.

15. The method of claim 13 , wherein the MPD is updated in at least one of units of the segment and units of a program formed by the segment.

16. The method of claim 13 , further comprising requesting the server to transmit the updated MPD at a time when the updated MPD is generated.

17. A client for receiving digital broadcast content, comprising:

a controller configured to execute one or more modules; and

a memory to store the one more modules,

wherein the one or more modules are configured to:

receive, from a server, a multimedia presentation description (MPD) including a first uniform resource location (URL) information indicating a location of a content provider providing the content; and

receive an updated MPD from the server,

wherein if a segment of the content is transmitted from the content provider to a network storage after a lapse of a timeshift buffering time of the segment at the content provider and stored in the network storage, the server receives a second URL information indicating a location where the segment is stored in the network storage from the network storage, and the updated MPD includes the second URL information, wherein the timeshift buffering time corresponds to a time in which a timeshift service for the segment is provided by the server,

acquire the segment stored in the network storage using the second URL information.

18. The client of claim 17 , wherein the updated MPD includes information about a time in which the segment was actually broadcasted.

19. The client of claim 17 , wherein the MPD is updated in at least one of units of the segment and units of a program formed by the segment.

20. The client of claim 17 , wherein the client device requests the server to transmit the updated MPD at a time when the updated MPD is generated.

21. A system for providing content for digital broadcast, the system comprising:

a network storage for receiving a segment of the content from a content provider after a lapse of a timeshift buffering time of the segment at the content provider and storing the segment, wherein the timeshift buffering time corresponds to a time in which a timeshift service for the segment is provided by the server;

a processor for generating a multimedia presentation description (MPD) including a first uniform resource location (URL) information indicating a location of the content provider providing the content and transmitting the MPD to a client device, receiving a second URL information indicating a location where the segment is stored in the network storage from the network storage, and generating an updated MPD including the second URL information; and

a transmitter for transmitting the updated MPD to a client device.

22. The system of claim 21 , wherein the updated MPD includes information about a time in which the segment was actually broadcasted.

23. The system of claim 21 , wherein the MPD is updated in units of the segment, or in units of a program formed by the segment.

24. The system of claim 21 , wherein the updated MPD is transmitted at a time when the updated MPD is generated, after a request for the updated MPD is received from the client device.

25. A client for receiving content for digital broadcast, the client comprising:

a receiver for receiving, from a server, a multimedia presentation description (MPD) including a first uniform resource location (URL) information indicating a location of a content provider providing the content and for receiving an updated MPD from the server, wherein if a segment of the content is transmitted from the content provider to a network storage after a lapse of a timeshift buffering time of the segment at the content provider and stored in the network storage, the server receives a second URL information indicating a location where the segment is stored in the network storage from the network storage, and the updated MPD includes the second URL information, wherein the timeshift buffering time corresponds to a time in which a timeshift service for the segment is provided by the server; and

a processor for acquiring the segment stored in the network storage using the second URL information.

26. The client of claim 25 , wherein the updated MPD includes information about a time in which the segment was actually broadcasted.

27. The client of claim 25 , wherein the MPD is updated in at least one of units of the segment and units of a program formed by the segment.

28. The client of claim 25 , wherein the client requests the server to transmit the updated MPD at a time when the updated MPD is generated.