Service connection apparatus and method in portable terminal

Abstract

A call connection method and apparatus are disclosed. When a service is released in a portable terminal that supports different communication modes due to a network problem, the call connection method and apparatus reconnects the service to another network. The call connection method includes performing a first service through a first network, analyzing, when the connected first service is released, the cause of disconnection, acquiring, when the cause of disconnection is a problem in the first network, connection information, and attempting to connect a second service through a second network based on the connection information.

What is claimed is: 
     
         1 . A call connection method in a portable terminal that supports multiple communication modes, the method comprising:
 establishing a connection with a first network supporting a first wireless communication technology;   performing a first service through the first network;   analyzing, when the connected first service is released, a cause of the disconnection;   acquiring, when the disconnection cause is a problem in the first network, connection information;   attempting to establish a connection with a second network supporting a second wireless communication technology different from the first wireless communication technology based on the connection information; and   performing a second service different from the first service through the second network.   
     
     
         2 . The method of  claim 1 , wherein the first service comprises a Video Telephony (VT) call service and the first network comprises a 3rd generation network. 
     
     
         3 . The method of  claim 2 , wherein the second service comprises a voice call service and the second network comprises a 2nd generation network. 
     
     
         4 . The method of  claim 2 , wherein the connection information comprises:
 information about the first network; and   information about a target portable terminal.   
     
     
         5 . The method of  claim 2 , wherein the acquiring of the connection information comprises:
 acquiring the connection information from a target portable terminal upon the performing of the first service;   storing the connection information; and   acquiring the stored connection information.   
     
     
         6 . The method of  claim 2 , further comprising:
 outputting information about the disconnection from the first service; and   outputting information about the connection to the second service after the attempting to establish the connection with the second network.   
     
     
         7 . A portable terminal that supports multiple communication modes, the terminal comprising:
 at least one communication circuit configured to establish a connection with a first network supporting a first wireless communication technology;   a memory configured to store information about a service disconnection cause and connection information of a target portable terminal that is connected to the service; and   at least one processor configured to:
 performing a first service through the first network, 
 analyzing, when the first service is released, a cause of the service release, 
 acquire, when the service release cause is a problem in the first network, connection information, 
 attempt to establish a connection with a second network supporting a second wireless communication technology different from the first wireless communication technology based on the connection information, and 
 perform a second service different from the first service through the second network. 
   
     
     
         8 . The portable terminal of  claim 7 , wherein the first service comprises a Video Telephony (VT) call service and the first network comprises a 3rd generation network 
     
     
         9 . The portable terminal of  claim 7 , wherein the second service comprises a voice call service and the second network comprises a 2nd generation network. 
     
     
         10 . The portable terminal of  claim 7 , wherein the connection information comprises:
 information about the first network; and   information about a target portable terminal.   
     
     
         11 . The portable terminal of  claim 7 , wherein the at least one processor is further configured to process the connection with another network based on connection information that is previously stored in the memory. 
     
     
         12 . The portable terminal of  claim 7 , wherein the at least one processor is further configured to:
 output information about the disconnection from the first service, and   output information about the connection to the second service after attempting to establish the connection with the second network.   
     
     
         13 . The portable terminal of  claim 7 , wherein the second service comprises at least one of a Code Division Multiple Access (CDMA) technology or a Global System for Mobile communication (GSM) technology. 
     
     
         14 . The portable terminal of  claim 7 , wherein the cause of the service release comprises at least one of radio link failure or handover failure. 
     
     
         15 . A terminal for communicating with multiple networks, the terminal comprising:
 a display screen;   a transceiver configured to transmit and receive a signal; and   at least one processor configured to:   identify an activation of a function to display a message regarding a network status, in case that a handover failure has occurred,   control the transceiver to connect to a first wireless network associated with a wireless local area network,   perform a service over the first wireless network,   detect whether a signal received from the first wireless network satisfies a predetermined condition,   identify whether a handover failure has occurred,   if the handover failure has not occurred and if the signal received from the first wireless network satisfies the predetermined condition:
 collect information about a second wireless network, and 
 establish a connection with the second wireless network based on the information, and 
   if the handover failure has occurred and if the signal received from the first wireless network satisfies the predetermined condition, control the display screen to display the message regarding the network status based on the identification.   
     
     
         16 . The terminal of  claim 15 , wherein the predetermined condition is associated with a detected signal strength being below a threshold signal strength. 
     
     
         17 . The terminal of claim  41 , wherein the message comprises a pop-up message. 
     
     
         18 . The terminal of claim  41 , wherein the network status comprises at least one of a disconnection from the first wireless network or a standby request. 
     
     
         19 . The terminal of  claim 15 , wherein the service comprises at least one of data communication, video call, or voice call. 
     
     
         20 . The terminal of  claim 15 , wherein the at least one processor is further configured to:
 control the transceiver to receive connection information of the second wireless network if the signal received from the first wireless network satisfies the predetermined condition,   control the transceiver to connect to the second wireless network supporting a cellular communication based on the received connection information, and   perform the service over the second wireless network.