Patent ID: 7039039

Claim:
A Quality-of-Service (QoS) Support method in a mobile communication system including an access terminal, an access network for performing packet data communication with the access terminal, a packet control function for controlling transmission and reception of packet data between the access network and the access terminal, and a packet data service node for exchanging packet data with the packet control function, the method comprising the steps of: (a) mapping, by the access terminal, a requirement based on an application characteristic to an Internet Protocol (IP) QoS parameter, generating a resource reservation protocol (RSVP) message, and transmitting the resource reservation protocol message to the packet data service node; (b) mapping, by the packet data service node, IP QoS information to be transmitted to the access terminal to QoS information needed in the access network, and transmitting the mapping result to the access network via the packet control function; and (c) receiving, by the access terminal, data including QoS information from the packet data service node, and performing communication according to the QoS information; wherein the step (b) comprises the steps of: (b1) determining whether a type of a message received by the packet data service node is defined as a type for Guaranteed Service; and (b2) classifying a received packet as Conversational Class if the type of the received message is defined as a type for Guaranteed Service.