Communication terminal and communication system

• US 20050036468A1
• Filed: 03/31/2004
• Published: 02/17/2005
• Est. Priority Date: 06/27/2003
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Miyabayashi, Shinji, Sudo, Shigeyuki
• Application Number:
  US10/812,941
• Publication Number:
  US 20050036468A1
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A communication terminal has a first transmitter/receiver, a second transmitter/receiver and a controller. The controller operates to activate the second transmitter/receiver when the first transmitter/receiver receives a request for activating the second transmitter/receiver.

Claims

1. A communication terminal, comprising:

a first transmitter/receiver which transmits and receives data according to a first communication method;

a second transmitter/receiver which transmits and receives data according to a second communication method; and

a controller which operates to activate the second transmitter/receiver when the first transmitter/receiver receives a request for activating the second transmitter/receiver.

2. The communication terminal according to claim 1,

wherein the controller operates to activate the first transmitter/receiver when electric power is applied to the communication terminal and to suspend operation of the second transmitter/receiver until the first transmitter/receiver receives a request for activating the second transmitter/receiver.

3. The communication terminal according to claim 1,

wherein the first transmitter/receiver is connectable to a wireless base station in a mobile network, while the second transmitter/receiver is connectable to a wireless LAN (Local Area Network) base station.

4. A communication terminal, comprising:

a first transmitter/receiver which transmits and receives data to and from a first base station;

a second transmitter/receiver which transmits and receives data to and from a second base station; and

a controller which operates to suspend an operation of the second transmitter/receiver until the first transmitter/receiver receives data representing a request for a communication by the second transmitter/receiver.

5. The communication terminal according to claim 4,

wherein the first transmitter/receiver forwards a notification indicating that the second transmitter/receiver is not able to transmit and receive data, when the first transmitter/receiver has received the data representing the request for the communication by the second transmitter/receiver and the communication by the second transmitter/receiver is not possible.

6. The communication terminal according to claim 4, further comprising:

a memory which stores identification data of the communication terminal;

wherein the first transmitter/receiver operates to transmit the identification data of the first communication terminal to the management server, when a user inputs a request for a communication by utilizing the second transmitter/receiver.

7. A communication system, comprising:

a first communication terminal having a first wireless transmitter/receiver and a second wireless transmitter/receiver;

a second communication terminal having a third wireless transmitter/receiver and a fourth wireless transmitter/receiver; and

a management server having a memory in which an identification data of the first communication terminal is stored;

wherein the first wireless transmitter/receiver operates to transmit identification data of the first communication terminal to the management server, when a user inputs into the first communication terminal a request for a communication with the second communication terminal by utilizing the second wireless transmitter/receiver; and

the management server executes an authentication of the user of the first communication terminal, on the basis of the identification data of the communication terminal which was forwarded from the first communication terminal and the identification data which is stored in the memory of the management server, and forwards a request for activating the fourth wireless transmitter/receiver to the third wireless transmitter/receiver if the authentication succeeds.

8. The communication system according to claim 7, wherein the first wireless transmitter/receiver and the third wireless transmitter/receiver are connectable to a wireless base station in a mobile network, while the second wireless transmitter/receiver and the fourth wireless transmitter/receiver are connectable to a base station in a wireless LAN.