Patent ID: 9137036
Filing Date: 2015-09-15
Classification: H04L,H04N

Abstract:
1. A method of notifying a second device of an event by a first device, the method comprising: receiving, by the first device from the second device, a service request message that requests a service and includes an unique identifier (ID) that uniquely identifies the second device; generating, in response to the service request message, mapping information which relates the unique ID of the second device to information regarding the service that the second device has requested; in response to an occurrence of an event related to the service, generating an event notification message including the unique ID of the second device by referring to the mapping information; and multicasting the event notification message to a plurality of devices including the second device, wherein the event notification message is selectively discarded or accepted by the plurality of devices based on the unique ID included in the event notification message.