Positioning a subscriber terminal in a packet-switched mobile telephony network using both packet-switched and circuit-switched messages

An objective of the present invention is used in packet-switched mobile phone network and user terminal and method, network element and system, and network, opposite to the devices' base station controller comprises core network unit (SGSN, 504), base station (501) and mobile terminal,Connected on the mobile phone network packet-switched groove is. The system (SMLC, 505) are used to determine comprises a position of the location of terminal, comprising (501) is a function of mobile phone network base station controller; The base station controller (501) and connected between position unit (SMLC) is a switch circuit. The base station controller (501) comprises a switch circuit (BSC) and packet-switched (PCU filler), a processing circuit switch and packet-switched message respectively, and for correlating arranged between the functionalities of switch circuit and packet-switched device (506,507), and used to transmit between the functionalities of packet-switched circuit and switching to the wire and data.