| CPC H04W 36/14 (2013.01) [H04W 12/06 (2013.01); H04W 12/088 (2021.01); H04W 12/72 (2021.01); H04W 36/30 (2013.01); H04L 65/1016 (2013.01)] | 10 Claims |
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1. An electronic device comprising:
a processor;
a wireless communication circuit operatively connected with the processor; and
a first subscriber identification module (SIM) and a second SIM that are mounted in the electronic device,
wherein the processor is configured to:
identify a state of a radio signal transmitted from a first network that is at least partially based on the first SIM, the radio signal being received through the wireless communication circuit, when the electronic device executes a call with an external electronic device by being connected with the first network,
control the wireless communication circuit to transmit a tunneling message for establishing a security tunnel with an enhanced packet data gateway (ePDG) of the first network to a second network connected with the electronic device, when determining at least partially based on a result of the identification that the electronic device enters a weak electric field environment of the first network, the tunneling message comprising an authentication request message for executing the call,
receive through the second network, a response with respect to the tunneling message transmitted to the first network through the second network,
transmit connection information, provided from the first network for the electronic device to execute the call with the external electronic device, to the first network by using the second network, and
control the wireless communication circuit to receive the radio signal, transmitted from the first network, for executing the call with the external electronic device through the second network.
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