Patent ID: 7668908

Claim:
A method for managing event notification in a communications network, comprising: subscribing to a first event source to create a first event subscription; receiving at least two event messages via the communications network, each event message comprising a subscription based-sequence number and a time stamp from the first event source when events occur at the first event source; determining the order of events within the first event source on the basis of the subscription based-sequence number within the at least two event messages; and subscribing to a second event source to create a second event subscription; receiving another at least two event messages via the communications network, each event message comprising a subscription based-sequence number and a time stamp from the second event source when second events occur at the second event source; determining the order of events within the second event source on the basis of the subscription based-sequence number within the another at least two event messages from the second event source; ordering the events from the second event source with respect to the first event source on the basis of the time stamp within each of the at least two event messages from the first event source and the another at least two event messages from the second event source; and revoking the first event subscription for the first event source.