Patent ID: 7269423

Claim:
A method of establishing a call for a Mobile Station (MS) according to a Quality of Service (QoS) of the call in a Base Transceiver Station (BTS) communicable with the MS in a service system where the MS, the BTS, and a Base Station Controller (BSC) are connected over a selected network, the method comprising the steps of: receiving a call setup request message including a QoS parameter from the MS; determining whether the call requires a QoS guarantee by checking the QoS parameter; calculating a remaining available bandwidth; determining whether the remaining available bandwidth can support a data rate required for the QoS guarantee of the call according to a user profile information acquired from a profile server if the call requires the QoS guarantee; and admitting the call and transmitting a call accept response signal to the BSC, if the data rate is supported or if the call does not require the QoS guarantee.