Calling system using mobile telephone terminal with location monitoring

• US 5,740,539 A
• Filed: 05/13/1996
• Issued: 04/14/1998
• Est. Priority Date: 05/12/1995
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ishii, Katsuhiro
• Primary Examiner(s): CUMMING, WILLIAM D
• Application Number:
  US08/647,691
• Time in Patent Office: 701 Days
• Field of Search: 455/456, 455/422
• US Class Current: 455/456.1
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A calling system includes radio zones, a mobile telephone terminal, a paging terminal unit, a central control unit, and a notifying section. Each radio zone includes a control unit, a memory unit, a relay station, and calling units. The mobile telephone unit determines a response disabled state of a callee and transmits the corresponding information to the control unit. The main control unit has a main memory unit. The notifying section notifies information indicating the absence of the callee to the control unit, the mobile telephone terminal, and the caller. The position information of the paging terminal unit is sequentially registered in the memory unit, the control unit or the central control unit searches for the paging terminal unit in cooperation with the memory unit or the main memory unit when the callee cannot respond to the incoming call, and when the paging terminal unit is detected, the paging terminal unit is called at a position where the paging terminal unit is detected, and the callee is called via at least one of the calling units which is arranged in the radio zone corresponding to the position where the paging terminal unit is detected.

Claims

1. A calling system using a mobile telephone terminal such as a mobile phone, comprising:

a plurality of radio zones, each including a control unit, a memory unit which cooperates with said control unit, a relay station, and a plurality of calling units, and belonging to a private area as a call range;

a mobile telephone terminal for determining a response disabled state of a callee with respect to an incoming call by measuring a time from generation of a terminating request, and transmitting, via said relay station, information indicating the response disabled state to said control unit arranged in a radio zone in which the terminating request is received;

a central control unit having a main memory unit to control each of said relay stations arranged in said plurality of radio zones via said control unit; and

means for notifying information indicating an absence of a callee from said central control unit to said control unit, and/or from said control unit to said mobile telephone terminal via said relay station, and further notifying the information from said mobile telephone terminal to the caller via a base station which has received a terminating request signal from said mobile telephone terminal,

wherein position information of said paging terminal unit is sequentially registered in said memory unit, said control unit or said central control unit searches for said paging terminal unit in cooperation with said memory unit or said main memory unit when the callee cannot respond to the incoming call, and when said paging terminal unit is detected, said paging terminal unit is called at a position where said paging terminal unit is detected, and the callee is called via at least one of said calling units which is arranged in the radio zone corresponding to the position where said paging terminal unit is detected.

2. A system according to claim 1, wherein if said paging terminal unit is detected in the radio zone in which said mobile telephone terminal is present when said control unit searches said memory unit, said paging terminal unit is called, and the callee is called via at least one of said calling units which is arranged in the radio zone corresponding to a position where said paging terminal unit is detected.

3. A system according to claim 1, wherein if said paging terminal unit is not detected in the radio zone in which said mobile telephone terminal is present when said control unit searches said memory unit, said central control unit cooperates with said main memory unit to search for another radio zone whose position is registered in said main memory unit, and if another radio zone is detected, said paging terminal unit positioned in said another radio zone is called, and the callee is called via at least one of said calling units which is arranged in said another radio zone.

4. A system according to claim 1, wherein said calling unit is sound calling means and/or signboard display unit.

5. A system according to claim 1, wherein said paging terminal unit comprises means for notifying said mobile telephone terminal of selection information via said relay station and said control unit, the selection information in accordance with selection of the callee which represents whether the callee responds to a terminating request to said mobile telephone terminal.

6. A system according to claim 5, wherein response disabled state information transferred to said mobile telephone terminal via said relay station and said control unit is notified to the caller via said sound output means and/or said display output means.