マルチモード移動端末およびその動作方法

Japanese Patent JP4335447

B2

A multi-mode mobile terminal having a subscriber identity is provided which uses knowledge of communications network supported service levels to navigate to a communication mode allowing the greatest possible service availability when the subscriber identity in at least one of the network modes is invalid. The mobile terminal may not only provide the ability to switch communication service from a current mode to an alternative mode to process emergency calls but may also restrict user operations on a communications network based on the services available without a valid subscriber identity. Operations of the mobile terminal invention may be supported by service level information on various communication service providers contained in memory within the mobile terminal or be obtained by the mobile terminal from the networks. Based on services availability information for each communications network available to the mobile terminal, the mobile terminal selects an appropriate network to utilize for a call initiated while the mobile terminal has no valid subscriber identification. An example of such a call would be an emergency call such as a 911 call.

Koreb, jabber
Whilap, Kirsten
Pantalon, bullet
Suwanchala, Anthony, Jay, The Third

JP2000550292A

September 30, 2009

April 15, 1999

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ERICSSON INC.

H04W4/90; H04W48/18; H04W88/06; H04W92/08

JP8511144A
JP5167532A

WO1998009462A1
WO1996028947A1

Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Youhei Kawabata
Kato Takushi
Yasuhiro Sakata
Kuniaki Shimizu
Hayashi Zouzo

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