A NODE FOR SHORT MESSAGE CONTEXT

摘要

A node (130, 135) for use in a cellular system (110, 115, 120), arranged to establish a context for a User Equipment, a UE (105), for the message types SMS, Small Data and Trigger Information. The node (130, 135) is arranged to establish the context when the UE (105) performs an Initial Attach to the cellular system and indicates support for at least one said message types. The node (130, 135) is arranged to have two modes available for the context, those modes being a "Currently Serving" mode and a "Forwarding" mode, where, in the Currently Serving mode, messages are delivered to the UE (105), and, in the Forwarding mode, messages are forwarded to a node (130, 135) that is in the Currently Serving mode at the moment.