| 摘要 |
Method when roaming by a mobile communication device (40) comprising a SIMcard (41) identifying itself using an IMSI roams between a home network (10) and one or several visited networks (20,26,30,36), which networksare interconnected by a PSTN (1). The method comprises the steps of a)storing on the SIM card (41) a first IMSI associated with a first collaborating network (20); b)initiatinga location update procedure using the first IMSI; c)triggered by the said location update procedure and based on the first IMSI, causing an STP (Signal Transfer Point) (25) of the first collaborating network(20) to send a location updatemessage to an ITP (Internet Transfer Point) (29); and d)causing the first ITP (29) to forward the message to an STP (16) of the home network (10) via a wide area net- work (6) and not using the PSTN (1). |
