MOBILITY MANAGEMENT IN TELECOMMUNICATION SYSTEMS

摘要

An LTE/SAE mobile telecommunications network is disclosed having a core network (28), a plurality of eNode Bs (26,27). A mobile terminal communicates with the core network (28) via one of the eNode Bs (26,27). In a first embodiment, when the mobile terminal (1) is in the RRC connected state, and there is a pause in data transfer, during which the mobile terminal is handed over from one eNode B (26) to another eNode B (27), the first eNode B (26) informs the new eNode B (27) of how long there has been a pause in data transmission so that an optimal length of the pause in data transmission can be maintained before the idle state is entered even when handover occurs between eNode Bs (26,27) during the pause in data transmission. In the second embodiment of the invention an element of the telecommunications network stores a history of movement of the mobile terminal (1) and passes this to a new eNode B (27). The "element" of the telecommunications system may be an eNode B (26) or may be the mobile terminal 1 itself. In a third embodiment, when handover occurs between a first eNode B (26) and a new eNode B (27), the first eNode B (26) provides the second eNode B with radio quality information relating to the mobile terminal (1).