| 主权项 |
1. A mobile communications system comprising one or more mobile communications terminals and a mobile communications network, the mobile communications network comprising a radio network part including a plurality of base stations arranged to transmit data to and receive data from the one or more communications terminals via a radio access interface, and a core network part which includes at least one packet data network gateway which is arranged to route the data to and receive the data from the base stations of the radio network part via the core network and a mobility manager arranged to track a location of the communications terminals within the mobile communications network for routing the data to or receiving the data from the communications terminals via the radio network part in accordance with context information which is stored for each of the one or more communications terminals, wherein the mobile communications network includes
a virtual mobility manager which is configured to store at least part of the context information of a communications terminal when the communications terminal enters an off-line state so that if a triggering event occurs when the communications terminal is in the off-line state, the virtual mobility manager can page the off-line communications terminal in the off-line state so that a communications bearer can be established with the communications terminal using the stored context information, for communicating the data after the communications terminal has moved to an attached state. |
