Method and apparatus for transmitting Byebye message when operation of controlled device in UPnP network is abnormally terminated

A non-transitory computer readable recording medium having embodied thereon a computer program for executing a method of notifying termination of an operation of a controlled device of a UPnP network, the method comprising:

• selecting, by a control point, at least one of a plurality of controlled devices in the network as a selected controlled device to be monitored whether or not an operation of the selected controlled device is terminated without notification;
• periodically determining whether or not the operation of the selected controlled device is terminated by using an Event message;
• and
• selectively notifying the network of the termination of the operation of the selected controlled device based on the determination,
• wherein the at least one of a plurality of controlled devices is selected based on header information of the selected at least one of a plurality of controlled devices and the header information of a message transmitted by the selected at least one of a plurality of controlled devices includes a value permitting monitoring during an abnormal termination of the selected at least one of a plurality of controlled devices.

An apparatus for notifying termination of an operation of a controlled device on a UPnP network, comprising:

• a monitoring determination unit implemented in hardware which selects at least one of a plurality of controlled devices in the network as a selected controlled device to be monitored in order to monitor whether or not an operation of the selected controlled device is terminated without notification;
• a monitoring unit which periodically determines whether or not the operation of the selected controlled device is terminated by using an Event message;
• and
• a processing unit which selectively notifies the network of the termination of the operation of the selected controlled device based on a result of the determination,
• wherein the at least one of a plurality of controlled devices is selected based on header information of the at least one of a plurality of controlled devices and the header information of a message transmitted by the selected at least one of a plurality of controlled devices includes a value permitting monitoring during an abnormal termination of the selected at least one of a plurality of controlled devices.

A method of determining a control point for transmitting a Byebye message in a UPnP network when an operation of a controlled device is abnormally terminated, comprising:

• (a) selecting at least one control point by using a Subscription Request message;
• and
• (b) determining whether or not to update the Subscription by using a Subscription Renewal message periodically transmitted by the selected control point,
• wherein the selected control point multicasts the Byebye message over the network when the operation of the controlled device is abnormally terminated without transmitting the Byebye message,
• wherein the at least one control point is selected based on header information of a message transmitted by the at least one control point and the header information identifies a number of controlled devices which the at least one control point monitors and header information of a response message, transmitted by the controlled device as a response of the message transmitted by the at least one control point, includes a value permitting monitoring of the controlled device during the abnormal termination of the controlled device.

A non-transitory computer readable recording medium having embodied thereon a computer program for executing a method of determining a control point for transmitting a Byebye message in a UPnP network when an operation of a controlled device is abnormally terminated, the method comprising:

• selecting at least one control point by using a Subscription Request message;
• and
• determining whether or not to update the Subscription by using a Subscription Renewal message periodically transmitted by the selected control point,
• wherein the selected control point multicasts the Byebye message over the network when the operation of the controlled device is abnormally terminated without transmitting the Byebye message,
• wherein the at least one control point is selected based on header information of the at least one control point and the header information of a message transmitted by the selected at least one control point identifies a number of controlled devices which the at least one control point monitors and header information of a response message, transmitted by the controlled device as a response of the message transmitted by the at least one control point, includes a value permitting monitoring of the controlled device during the abnormal termination of the controlled device.

A controlled device in a UPnP network, comprising:

• a control point selection unit implemented in hardware which selects at least one control point by using a Subscription Request message;
• and
• an update determination unit which determines whether or not to update the Subscription by using a Subscription Renewal message periodically transmitted by the selected control point, wherein the selected control point multicasts the Byebye message over the network instead of a controlled device of which operation is terminated without transmitting the Byebye message,
• wherein the at least one control point is selected based on header information of a message transmitted by the at least one control point and the header information identifies a number of controlled devices which the at least one control point monitors and header information of a response message, transmitted by the controlled device as a response of the message transmitted by the at least one control point, includes a value permitting monitoring of the controlled device during the abnormal termination of the controlled device.