| 摘要 |
<p>The invention deals with mobile telecommunication systems allowing prepayment. In such systems mobile stations can have a prepayment account and means for updating said prepayment account according to a billing rate. The invention deals with the case where the billing rate may change when these mobile is moving (in ETACS and AMPS standards notably the billing rate is different in the home area and in the non-home area). According to the invention base stations have means for sending billing rate updating information to mobile station depending on the current location of said mobile station.</p> |
