Apparatus and method for supporting handoff between heterogeneous networks in portable terminal

摘要

A portable terminal is configured to support a handoff between heterogeneous networks. The portable terminal includes a first communication unit, a second communication, a coverage identifying unit, and a switching unit. The first communication unit communicates with a mobile communication network. The second communication unit communicates with a heterogeneous network. The coverage identifying unit identifies entry of the portable terminal into a heterogeneous network area while performing a call connection through the mobile communication network. The switching unit attempts call connection through the heterogeneous network while maintaining the call connection through the mobile communication network when the entry of the portable terminal into the heterogeneous network area is identified. When a response to the call connection through the heterogeneous network is received, the switching unit terminates the call connection through the mobile communication network and maintains the call connection through the heterogeneous network.

主权项

1. A portable terminal comprising:
a first communication unit configured to perform a first call connection via a first network; a second communication unit configured to perform a second call connection via a second network; and a controller configured to:
control the first communication unit to establish the first call connection with a second terminal by using a phone number of the second terminal;control the second communication unit to attempt the second call connection to the second terminal by using a phone number of the second terminal while maintaining the first call connection in response to an entry of the portable terminal into a second network area during the first call connection being identified;receive, from the second terminal, a response to the second call connection;if the response is a rejection for the second call connection, stop an operation of the second communication unit and maintain the first call connection; andif a response is a acceptance for the second call connection, stop an operation of the first communication unit and maintain the second call connection.