Radio telephone system and its control method

• US 5,086,452 A
• Filed: 06/09/1989
• Issued: 02/04/1992
• Est. Priority Date: 06/13/1988
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Toba, Masanori, Ito, Koichi
• Primary Examiner(s): Dwyer, James L.
• Assistant Examiner(s): Shehata, M.
• Application Number:
  US07/363,974
• Time in Patent Office: 970 Days
• Field of Search: 579/58, 579/61, 579/63, 579/424
• US Class Current: 455/561
• CPC Class Codes: H04M 1/72508 using a control channel
• CPC Class Codes: H04M 1/73 Battery saving arrangements
• CPC Class Codes: H04W 52/0251 using monitoring of local events, e.g. events related to user activity
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A mobile unit is normally disposed in a predetermined positional relationship with a base unit connected to a wired line. For example, the mobile unit is mounted on the mobile-unit receiving part of the base unit. If the predetermined positional relationship is changed, it is detected by means of a detector such as a electrical, mechanical, or optical detector. In response to the detection of a change in the predetermined positional relationship, a radio link may be established between the base unit and the mobile unit or a communication link may be established between the mobile unit and a calling party. Furthermore, in response to the detection of the change, the mobile unit or the base unit may be partly or entirely powered so as to establish the radio link or the communication link. When the mobile unit is reset to a position in the predetermined positional relationship, it is detected by the detector. Responsive to the detection of the reset of the mobile unit, the established radio or communication link may be disconnected while the mobile unit or the base unit may be partly or entirely powered off.

Claims

1. A radio telephone system, comprising:

a base unit connected to a wired line;

a radio telephone set connected through a spatial radio circuit to said base unit;

detecting means for detecting whether or not said radio telephone set is mounted on a telephone-set receiving part provided in said base unit;

control means for controlling connection and disconnection between said wired line and said radio telephone set through said spatial radio circuit on the basis of an output of said detecting means; and

wherein said detecting means comprises switching means which is turned ON and OFF when said radio telephone set is mounted on and dismounted from said telephone-set receiving part of said base unit, respectively.

2. A radio telephone system, comprising:

a base unit connected to a wired line;

a radio telephone set connected through a spatial radio circuit to said base unit;

detecting means for detecting whether or not said radio telephone set is mounted on a telephone-set receiving part provided in said base unit;

selection means for determining that on-hook and off-hook operations of said radio telephone set are carried out by a hook switch of said radio telephone set or by an output of said detecting means;

means for controlling connection and disconnection between said wired line and said radio telephone set through said spatial radio circuit on the basis of on/off signals of said hook switch when said selection means is set to select the on-hook and off-hook operations by said hook switch of said radio telephone set, and for controlling the connection and disconnection between said wired line and said radio telephone set through said spatial radio circuit on the basis of the output of said detecting means when said selection means is set to select the on-hook and off-hook operations by the output of said detecting means; and

wherein said detecting means comprises switching means which is turned ON and OFF when said radio telephone set is mounted on and dismounted from said telephone-set receiving part of said base unit, respectively.

3. A base unit for use in a cordless or radio telephone system wherein a mobile unit is normally disposed in a predetermined positional relationship with said base unit connected to a subscriber line, said mobile unit broadcasting a control signal for radio link establishment between said base unit and said mobile unit over at least a radio channel, said base unit comprising:

detecting means for detecting a change of the predetermined relationship;

signal detecting means for receiving signals transmitted over the radio channel and detecting said control signal within the received signals;

control means coupled to said detecting means for controlling said signal detecting means so that the operation of said signal detecting means is initiated in response to the detection of a change of the predetermined positional relationship; and

power supply means coupled to said detecting means for supplying power to said signal detecting means in response to the detection of a change of the predetermined relationship.

4. A base unit for use in a cordless or radio telephone system wherein a mobile unit is normally disposed in a predetermined positional relationship with said base unit connected to a subscriber line, said mobile unit broadcasting a control signal for radio link establishment between said base unit and said mobile unit over at least a radio channel, said base unit comprising:

detecting means for detecting a change of the predetermined relationship;

signal detecting means for receiving signals transmitted over the radio channel and detecting said control signal within the received signals;

control means coupled to said detecting means for controlling said signal detecting means so that the operation of said signal detecting means is initiated in response to the detection of a change of the predetermined positional relationship; and

transmitting means coupled to said detecting means for transitting a response signal responding to said control signal and wherein said transmitting means is powered in response to the detection of a change of the predetermined positional relationship.

5. A base unit for use in a cordless or radio telephone system wherein a mobile unit is normally disposed in a predetermined positional relationship with said base unit connected to a subscriber line, said mobile unit broadcasting a control signal for radio link establishment between said base unit and said mobile unit over at least a radio channel, said base unit comprising:

detecting means for detecting a change of the predetermined relationship;

signal detecting means for receiving signals transmitted over the radio channel and detecting said control signal within the received signals;

control means coupled to said detecting means for controlling said signal detecting means so that the operation of said signal detecting means is initiated in response to the detection of a change of the predetermined positional relationship; and

switching means and wherein said detecting means detects the change of the predetermined positional relationship by a switching operation of said switching means.