Patent ID: 8300600

Claim:
A system for releasing quality of service (QoS) resources in a mobile communication network, comprising: a Packet Data Serving Node (PDSN) to allocate QoS resources to a mobile terminal after setting a session connection to the mobile terminal through a first network; and a text message server to receive a text message from the mobile terminal through a second network, the text message for requesting release of the QoS resources after the mobile terminal has escaped the first network, and to transmit QoS resource release information included in the text message to the PDSN, wherein the PDSN releases the QoS resource allocated to the mobile terminal through the first network on the basis of the QoS resource release information received from the text message server, wherein the QoS resource release information comprises 5-tuple (transmission address, reception address, transmission port, reception port, and next header information).