APPARATUS AND METHOD FOR ORIGINATING CALL BY SUBSTITUTE COMMUNICATION NETWORK WHEN ORIGINATING CALL IS BARRED

摘要

A portable terminal and a method for originating a call through a substituted network when originating a call is barred due to overload of a first network is disclosed herein. A call may be originated by automatically switching the communication mode of the portable terminal from the first network such as an LTE network to a second network such as a 3G network or a 2G network, when originating a call is barred in the first network. The information of the cell of the second network is searched from a second network database stored in advance, which allows the time to search for a cell and time to register in the second network decrease. The searched cell with the highest power level may be selected and the call is originated through the selected cell of the second network.

主权项

1. A portable terminal for originating a call, the portable terminal comprising:
a reception unit to receive from a base station a message barring originating a call in a first network; a storage unit to store a first information, the first information being information of one or more cells of a second network included in a system information block (SIB) message; an input unit to receive a request to originate a call; a control unit to select a cell in the storage unit with a power level higher than a preset value if originating the call is barred in the first network; and a transmission unit to originate the call in the selected cell.