Method for updating contents of a DMS in a DLNA system

• US 20070130308A1
• Filed: 08/02/2006
• Published: 06/07/2007
• Est. Priority Date: 12/05/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Oh, Yun-Je, Han, Young-Seop, Choi, Woo-Jun, Shin, Ho-Chul, Kang, Seung-Mi, Bae, Young-Kyu, Kim, Chul-seung
• Granted Patent: US 8,805,923 B2
• Time in Patent Office: Days
• US Class Current: 709/223
• CPC Class Codes: H04L 12/2812 describing content present in a home automation network, e.g. audio video content retrieval from the Internet G06F16/95
• CPC Class Codes: H04L 2012/2841 Wireless
• CPC Class Codes: H04L 2012/2849 Audio/video appliances

Abstract

A method for updating contents of a Digital Media Server (DMS) in a digital living network alliance system (DLNA) is dislcosed. An update process is performed through a periodic update event in a Digital Media Player (DMP) that receives all content information of the DMS. Upon determining that information loss has occurred in the update process, the DMP sends to the DMS a request for information about a list of items possessed by the DMS. The DMP receives the requested information about the list of items and compares the received information about the list of items with information about pre-stored items to obtain a comparison result. When a difference occurs as the comparison result, all information about contents of the DMS is obtained through a browse action. When the difference does not occur as the comparison result, the update process is continuously performed.

Claims

1. A method for updating contents of a Digital Media Server (DMS) in a Digital Living Network Alliance (DLNA) system, comprising the steps of:

a) performing an update process through a periodic update event in a Digital Media Player (DMP) that receives all content information of the DMS;

b) sending a request for information about a list of items possessed by the DMS from the DMP to the DMS, upon determining that information loss has occurred in the update process;

c) receiving from the DMS by the DMP information about the list of items and comparing by the DMP the received information about the list of items with information about pre-stored items at the DMP to obtain a comparison result;

d) obtaining by the DMP all information about contents of the DMS using a browse action when a difference occurs as a comparison result of step c); and

e) performing step a) through step e) when the difference does not occur as the comparison result of step c).

2. The method of claim 1, wherein the periodic update event of step a) is a “

ContainerUpdateIDs”

event.

3. The method of claim 1, wherein the request for the information about the list of items possessed by the DMS in step b) is made by the DMP sending a “

GetItemTreeList”

action to the DMS, said action being defined by;

Name Req or Opt GetItemTreeList Opt

4. The method of claim 3, wherein the information about the list of items of step c) is received from the DMS by the DMP in an “

ItemTreeList”

defined by;

Data Variable Name Req or Opt Type Allowed Value Default Value ItemTreeList Opt String String —

5. The method of claim 4, wherein identifiers (IDs) of items within an item tree of the DMS are hierarchically stored in the “

ItemTreeList”

in Extensible Markup Language (XML) format, and the DMP identifies all tree layers and layer-by-layer IDs using the “

ItemTreeList”

.

6. A method for updating contents of a Digital Media Server (DMS) in a Digital Living Network Alliance (DLNA) system, comprising the steps of:

a) performing an update process through a periodic update event in a Digital Media Player (DMP) that receives all content information of the DMS;

b) sending a request for information about a list of items possessed by the DMS from the DMP to the DMS, upon determining that information loss has occurred in the update process;

c) receiving by the DMP from the DMS the requested information about the list of items and comparing by the DMP the received information about the list of items with information about pre-stored items at the DMP to obtain a comparison result;

d) requesting by the DMP from the DMS contents of a different list and obtaining information about contents of the different list from the DMS, when a difference occurs as a comparison result of step c); and

e) performing step a) through step e) when the difference does not occur as the comparison result of step c).

7. The method of claim 6, wherein the periodic update event of step a) is a “

ContainerUpdateIDs”

event.

8. The method of claim 6, wherein the request for the information about the list of items possessed by the DMS in step b) is made by the DMP using a “

GetItemTreeList”

action defined by;

Name Req or Opt GetItemTreeList Opt

9. The method of claim 8, wherein the information about the list of items of step c) is received from the DMS by the DMP in an “

ItemTreeList”

defined by;

Data Variable Name Req or Opt Type Allowed Value Default Value ItemTreeList Opt String String —

10. The method of claim 9, wherein identifiers (IDs) of items within an item tree of the DMS are hierarchically stored in the “

ItemTreeList”

in Extensible Markup Language (XML) format, and the DMP identifies all tree layers and layer-by-layer IDs using the “

ItemTreeList”

.

15. A computer readable medium storing a program configured to execute the method of claim 10.

16. The computer readable medium of claim 15, wherein the medium is selected from the group consisting of CD-ROM, RAM, floppy disk, hard disk, and optical magnetic disk.

11. An apparatus for updating contents of a Digital Media Server (DMS) in a Digital Living Network Alliance (DLNA) system, comprising:

a computer readable recording medium;

a state variable stored on said medium used to store a content tree list of the DMS; and

a computer executable program stored on said medium to periodically update the DMS whenever the program determines if the update succeeds, said determination being accomplished through the comparison of a state variable stored in said medium with a state variable describing the contents of the DMS.

12. The apparatus of claim 11, wherein said state variable is define by an “

ItemTreeList”

defined by;

Data Variable Name Req or Opt Type Allowed Value Default Value ItemTreeList Opt String String —

13. The computer readable medium of claim 12, wherein the medium is selected from the group consisting of CD-ROM, RAM, floppy disk, hard disk, and optical magnetic disk.

14. The computer readable medium of claim 11, wherein the medium is selected from the group consisting of CD-ROM, RAM, floppy disk, hard disk, and optical magnetic disk.