Patent ID: 6542521
Filing Date: 2003-04-01
Classification: H04W

Abstract:
A method of improving service level selection in a communication system having a mobile network and a fixed network, wherein an interworking function (IWF) is arranged between the fixed network and a mobile station (MS) operating in the mobile network, and wherein high speed circuit switched data (HSCSD) services are provided to the ms utilizing at least one traffic channel in the mobile network, said method comprising the steps of:establishing a HSCSD session in which data is exchanged between the fixed network and the MS; determining by the IWF whether a data rate in the fixed network differs significantly from an Air Interface User Rate (AIUR) in the mobile network; upon determining that the data rate in the fixed network differs significantly from the AIUR, sending an indication from the IWF to the MS recommending a change in service level selection; sending a request from the MS to the mobile network to change the service level selection; and adding or removing traffic channels to the HSCSD session by the mobile network, in accordance with the request from the MS.