Patent ID: 6834196
Filing Date: 2004-12-21
Classification: H04W

Abstract:
A method for performing a USSD transfer for transmitting data between two parties, namely a mobile station and a cellular communications network, wherein the USSD transfer takes place on a fast channel if the mobile station is involved in a call, and otherwise on a slow channel;the method comprising: determining the amount of data to be transmitted in the USSD transfer; if the amount of data to be transmitted in the USSD transfer is likely to exceed a predetermined threshold, and if the mobile station is not involved in a call, directing the mobile station to call mode for performing the USSD transfer on the fast channel; and directing the mobile station into call mode by initiating a call attempt, wherein the party that initiates the USSD transfer also initiates the call attempt wherein the network, when initiating the USSD transfer, sends the mobile station an indication that the mobile station must initiate the call attempt, and wherein the mobile station, when initiating the call attempt, calls a non-existent number or itself.