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Method and apparatus for connecting emergency call in portable terminal

A portable terminal and emergency call technology, which is applied in the direction of interconnection devices, connection management, selection devices, etc., and can solve problems such as inability to connect to emergency calls

Inactive Publication Date: 2008-07-16
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Therefore, conventional portable terminals generally have a problem that an emergency call cannot be connected when the SIM card is not inserted into the portable terminal, and when the SIM card is set in a state where the emergency call can only be accessed through an unlicensed band network.

Method used

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  • Method and apparatus for connecting emergency call in portable terminal
  • Method and apparatus for connecting emergency call in portable terminal
  • Method and apparatus for connecting emergency call in portable terminal

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Embodiment Construction

[0020] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

[0021] The following describes a method and apparatus for connecting an emergency call using information recorded in a Subscriber Identity Module (SIM) card, which is also pre-stored in a dual-mode portable terminal supporting cellular networks (eg, GSM or UMTS) and unlicensed band networks in the memory. Also, the SIM card is an IMS Subscriber Identity Module (SIM) card containing the information required during the IMS network registration process. Unlicensed band networks use unlicensed industrial, scientific, and medical (ISM) wireless bands. Examples of unlicensed bands include WiFi (IEEE 802.11, HyperLan), Bluetooth, 802.15.4, and Ultra Wideband (UWB). The invention applies to all unlicense...

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PUM

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Abstract

A method and apparatus for connection an emergency call in a dual mode portable terminal supporting both a cellular network and an unlicensed-band network using an unlicensed Industrial, Science, and Medical (ISM) frequency band (e.g., WiFi, Bluethooth, UWB, etc.) are provided. The method includes if an emergency call connection event occurs, searching for an accessible network and checking an insertion state of a SIM card; if the unlicensed-band network is accessible and the SIM card is not inserted, performing an IP-based Multimedia Subsystem (IMS) registration process by using information pre-stored in a memory; and connecting the emergency call through the unlicensed-band network.

Description

technical field [0001] The present invention relates to a method and an apparatus for connecting an emergency call in a portable terminal, and more particularly to using a mobile terminal based on IP (Internet Protocol) Multimedia Subsystem (IMS) network connection method and apparatus for emergency calls in an unlicensed frequency band. Background technique [0002] Currently, mobile service providers are conducting extensive research and development on a portable terminal emergency call technology that enables a user to make an emergency call if the user encounters an emergency situation. [0003] In this case, since portable terminals have been developed that support access protocols using both cellular and unlicensed wireless bands, dual-mode portable terminals can now communicate between cellular and unlicensed networks during voice and data sessions. The handover process is performed between the mobile terminals, so that the communication can also be realized when the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/22H04Q7/38H04M7/00H04W4/90H04W48/18
CPCH04W76/007H04W4/22H04W48/18H04W76/50H04W4/90A22C25/20A22C25/08A22C25/06B26D7/2621B26D2210/02
Inventor 崔钟武蔡熙仲李政勋金美顺
Owner SAMSUNG ELECTRONICS CO LTD
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