Method and apparatus for synchronising the content directory service in a Universal Plug and Play (UPnP) network

摘要

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 (402)an event message containing information of the modification of the content, and multicasts (403) 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.