Abstract: Packet data are efficiently communicated from a packet data network to a mobile subscriber by way of a mobile communications network. When the mobile communications network receives a message from the packet data network intended for the mobile subscriber, an available mobile communications network packet address is dynamically assigned from a pool of packet addresses to the mobile subscriber. Thereafter, packets included in the data message are routed to the mobile subscriber using that dynamically-allocated address. When the address is no longer needed, it is returned to the pool. Each packet address in the pool includes a corresponding indication that designates whether that address is allocated or available for allocation. A correspondence is established between a name associated with the mobile subscriber (e.g., an Internet domain name), and a mobile subscriber identifier (e.g., an IMSI). A dynamically-assigned packet address is associated with the corresponding mobile subscriber name and identifier.

Abstract: A method of generating Call Detail Records (CDRs) for a subscriber 2 of a mobile telecommunications network 1. The method comprises transferring a CDR interval parameter from the Home Location Register (HLR) 6 of said telecommunications network 1 to a serving exchange 4, said CDR interval parameter being associated with the subscriber 2 and defining the intervals at which CDRs are to be generated for the subscriber 2 by said exchange 4. Following the setting up of a connection initiated by the subscriber 2, CDRs are generated at said exchange 4 periodically according to said defined interval.