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— This paper proposes a novel lookup service enabler for presence-based applications and its architecture in the 3GPP IP Multimedia Subsystem (IMS). The new service enabler makes possible the realization of a wide range of new (or enhanced) end-user applications. It allows end-users to discover groups of persons (or objects) that meet specific constraints(More)
Grouping messaging is one of popular communication tools nowadays in both internet and telecom network. It can also be viewed as one of optional service features for different applications/services, e.g. instant messaging, chat, file transfer, MMS, SMS and etc. The range or scope of message propagation is normally limited to the boundary of a well defined(More)
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