METHOD AND APPARATUS FOR SYNCHRONIZING CONTENT DIRECTORY SERVICE IN UNIVERSAL PLUG AND PLAY NETWORK
First Claim
1. A method of synchronizing a content directory service of a Universal Plug and Play (UPnP) device, the method comprising:
- sensing whether content of the UPnP device is modified;
generating an event message comprising information related to the modified content; and
multicasting the generated event message on a UPnP network.
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Abstract
A method and apparatus for synchronizing a content directory service (CDSs) of a Universal Plug and Play (UPnP) device. In the method, a CDS, whose content is modified, generates an event message containing information of the modification of the content, and multicasts the event message to a UPnP network. Other CDSs that receive the event message update their content based on the event message. Accordingly, a control point is not required to initiate and does not intervene in a process of synchronizing a plurality of CDSs, thereby reducing load on a memory or a central processing unit (CPU) of the control point, compared to conventional UPnP synchronization of devices. Further, an action of a CDS need not be repeatedly called, thereby reducing network traffic.
70 Citations
24 Claims
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1. A method of synchronizing a content directory service of a Universal Plug and Play (UPnP) device, the method comprising:
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sensing whether content of the UPnP device is modified; generating an event message comprising information related to the modified content; and
multicasting the generated event message on a UPnP network. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for synchronizing a content directory service of a Universal Plug and Play (UPnP) device, the apparatus comprising:
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a content database comprising content; a modification monitor unit to sense if the content is modified; an event message generating unit to generate an event message comprising information related to the modified content that was sensed by the modification monitor unit; and an event message transmitting unit to multicast the generated event message to a UPnP network. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of synchronizing a content directory service of a Universal Plug and Play (UPnP) device, the method comprising:
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receiving a event message comprising information related to modified content from a modified device; determining if the content of the UPnP device should be synchronized with the modified device based on the received event message; and synchronizing the content of the UPnP device with the modified device selectively based on the determination. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An apparatus for synchronizing content of a Universal Plug and Play (UPnP) device, the apparatus comprising:
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a content database comprising content; an event message receiving unit to receive an event message comprising information related to modified content from a modified device; and a content update unit to update content of the UPnP device selectively based on the received event message. - View Dependent Claims (21, 22, 23, 24)
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Specification