| 摘要 |
A mobile communications network communicates data packets to or from one or more communications terminals. The mobile communications network includes a plurality of base stations, forming a radio network part for communicating data packets to or from the communications terminals via a wireless access interface, and a core network part which includes a mobility manager. A first of the base stations is configured to receive a short message data packet from one of the communications terminals, the short message data packet providing context information for communicating the short message data packet to the mobility manager. The mobility manager is configured to receive the short message data packet, to identify the communications terminal which has sent the short message data packet based on the content of the packet, to determine, from the short message data packet an indication of the first base station to which the communications terminal is attached, and to store an indication of the first base station through which the short message data packet was sent in association with an identifier of the communications terminal. The mobile communications network is configured in association with an attempt to communicate a down link data packet to the communications terminal via the first base station, to identify that the communications terminal has changed attachment to a second base station, and to send the data packet to the second base station for communication to the communications terminal. Accordingly a reduced mobility management can be provided to a mobile communications device (such as a machine type communications (MTC) terminal) in which a mobility manager does not maintain a location of the mobile terminal and full handover is not supported allowing more simple form of communications terminal to be implemented.
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