| 摘要 |
<p>In general the invention addresses the problem of providing a high quality video communication under limited bandwidth.
A method for selecting a QoS in a portable communication system includes, when using a high quality video communication service, sending a request for the high quality video communication service to a destination terminal (200) using a Circuit Service Data channel, receiving a reply message to the high quality video communication service request and, when the reply message is an acceptance of an execution of the high quality video communication service, disconnecting the Circuit Service Data channel and then connecting a Packet Service Data channel, and providing the high quality video communication service using the Packet Service Data channel.
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