Wireless communication system

• US 5,724,647 A
• Filed: 03/16/1995
• Issued: 03/03/1998
• Est. Priority Date: 02/29/1988
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Sato, Hideaki
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): TO, DORIS HA
• Application Number:
  US08/404,986
• Time in Patent Office: 1,083 Days
• Field of Search: 455/33.1, 455/54.1, 455/54.2, 455/56.1, 455/67.1, 455/89, 455/73, 455/226.2, 455/67.3, 379/58, 379/59, 379/61, 379/63
• US Class Current: 455/552.1
• CPC Class Codes: H04M 1/725 Cordless telephones user interfaces specially adapted therefor H04M1/724
• CPC Class Codes: H04M 1/72505 Radio link set-up procedures
• 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

This invention relates to a wireless communication system, which comprises plural wireless communication units having different communication protocols, and in which a proper wireless communication unit is automatically selected from the plural wireless communication units in accordance with the operation states of the plural wireless communication units to make communication possible. Thereby, troublesome operation is not required, an optimum wireless communication method can be automatically selected, and communication cost can be reduced. In the wireless communication system of the present invention, when mobile stations are registered in a fixed station, preferential orders of the mobile stations are stored, and calling/call-reception and communication processings are controlled according to the preferential orders.

Claims

1. A communication terminal device comprising:

plural wireless communication means including first wireless communication means for performing wireless communication with a direct exchange and second wireless communication means for performing wireless communication with a base unit connected to a communication line from an exchange;

selection means for selecting one of the first and second wireless communication means; and

communication means for performing communication using the wireless communication means selected by said selecting means,

wherein said selection means preferentially selects said second wireless communication means after power is supplied or a calling operation is performed regardless of a selection of an operator, even if said second wireless communication means has a lower signal quality than said first wireless communication means.

2. A communication terminal device according to claim 1, wherein said selection means preferentially selects said second communication means when said second communication means is operable and selects said first communication means when said second communication means is inoperable.

3. A communication terminal device comprising:

plural wireless communication means including first wireless communication means for performing wireless communication with a direct exchange and second wireless communication means for performing wireless communication with a base unit connected to a communication line from an exchange;

selection means for selecting one of the first and second wireless communication means; and

communication means for performing communication using the wireless communication means selected by said selecting means,

wherein said selection means selects either one of said first and second wireless communication means after power is supplied and before a calling operation is selected, and

wherein said selection means preferentially selects said second wireless communication means even if said second wireless communication means has a lower signal quality than said first wireless communication means.

4. A communication terminal device comprising:

first communication means for performing wireless communication with a direct exchange;

second communication means for performing wireless communication with a base unit connected to a communication line from an exchange;

communication means for performing communication using either one of said first and second communication means;

first discriminating means for discriminating whether communication can be performed by said first communication means; and

second discrimination means for discriminating whether communication can be performed by said second communication means;

wherein said communication means performs communication by using either one of said first and second communication means in accordance with discrimination results of said first and second discriminating means, and

wherein said communication means performs communication by preferentially using said second communication means regardless of the discriminating results of the first discriminating means when said second discriminating means discriminates that the communication by said second communication means can be performed even if said second communication means has a lower signal quality than said first communication means.