| 摘要 |
<p>The invention relates to a packet-switched part of a mobile communication system, utilising PDP addresses as temporary or permanent network-layer subscriber addresses. With the PDP context a mobile station (MS) is connected to different PDP addresses. A PDP context comprises different data transmission parameters, such as QoS and TFT. The user can modify his PDP context. The invention comprises storing (3-6) the original TFT parameter at least for the duration of the PDP context modification, so that it can be returned (3-9) to the gateway GPRS support node (GGSN) if the radio network does not accept the new QoS profile during the PDP context modification.</p> |
