Mobile radio apparatus

• US 5,438,701 A
• Filed: 12/07/1993
• Issued: 08/01/1995
• Est. Priority Date: 12/11/1992
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Yamada, Daisuke, Kato, Osamu, Miya, Kazuyuki, Nagase, Taku
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): LE, THANH C
• Application Number:
  US08/162,358
• Time in Patent Office: 602 Days
• Field of Search: 455/33.1, 455/54.1, 455/89, 455/127, 455/343, 340/825.44, 379/58, 379/57
• US Class Current: 455/574
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0296 switching to a backup power supply
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

When a power supply of a mobile radio apparatus is turned on, a power supply change-over switch of a power supply control unit is changed over to the side of a pager unit to turn on only a power supply of the pager unit, so that a pager network which does not require position registration is utilized to perform intermittent receiving operation with low power consumption. When there is an incoming call to the pager unit, a CPU of the power supply control unit receives an incoming control signal from a pager decoding circuit and changes over the power supply change-over switch to the side of a radio-telephone line terminal unit to turn on the radio telephone line terminal unit and turn off the pager unit. The CPU sends a control signal to a timing control circuit of the radio-telephone line terminal unit so that the position registration is performed by utilizing a mobile radio network and an operation mode of the mobile radio apparatus proceeds to a usual talking mode. After a pager calling has been performed in a calling side, the mobile radio apparatus is called by the portable telephone number and talking is then is made. When the talking has been finished, the CPU receives a control signal from the timing control circuit and changes over the power supply change-over switch to the side of the pager unit again to turn on the pager unit to enter a waiting state for reception.

Claims

1. A mobile radio apparatus comprising:

a radio-telephone line terminal unit, having a telephone number, for talking with one of a plurality of radio-telephone base stations in accordance with a position of said mobile radio apparatus and for producing a first control signal when talking of said radio-telephone line terminal unit is finished;

a pager unit for receiving a calling signal from at least one page base station and for producing a second control signal when said pager unit receives a calling signal specifying said pager unit, said pager unit having the same telephone number as the telephone number of said radio-telephone line terminal unit wherein said radio-telephone line terminal unit also receives a calling signal at the same time said pager unit receives said calling signal;

a power supply and selector means for supplying electric power to one of said radio-telephone line terminal unit and said pager unit, wherein said radio-line terminal unit and said pager unit are not supplied with electric power at the same time;

a control circuit for controlling said power supply and selector means to;

(a) supply electric power to said pager unit when said mobile radio apparatus is actuated,

(b) supply electric power to said radio-telephone line terminal unit when said control circuit receives said second control signal from said pager unit, and

(c) supply electric power to said pager unit again when said control circuit receives said first control signal from said radio-telephone line terminal unit.

2. A mobile radio apparatus according to claim 1, further comprising timer means, and wherein said control circuit controls said timer means to start measurement of time when said control circuit receives said second control signal from said pager unit, and controls said power supply and selector means to supply electric power to said pager unit again when an elapsed time represented by an output signal of said timer means exceeds a predetermined time period while there is no incoming signal to said radio telephone line terminal unit

3. A mobile radio apparatus according to claim 1, wherein said control circuit controls said radio-telephone line terminal unit to perform position registration for acknowledging the position of said mobile radio apparatus to at least one of said radio-telephone base stations when said control circuit receives said second control signal from said pager unit.