Mobile station used for CDMA mobile communication systems

• US 7,289,832 B1
• Filed: 09/19/2000
• Issued: 10/30/2007
• Est. Priority Date: 09/29/1999
• Status: Expired due to Fees

• Current Assignee: Fujitsu Mobile Communications Limited (Fujitsu Limited)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kawabata, Kiyoshi, Enoki, Masayuki
• Primary Examiner(s): NGUYEN, HUY D
• Application Number:
  US09/664,855
• Time in Patent Office: 2,597 Days
• Field of Search: 340/3.4, 340/3.1, 455/127.5, 455/574, 455/572, 455/343.1, 455/435.1, 455/343.2, 455/343.5, 455/343, 455/435
• US Class Current: 455/574
• CPC Class Codes: H04W 52/0241 where no transmission is received, e.g. out of range of the transmitter
• CPC Class Codes: H04W 60/02 by periodical registration
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A mobile station for a CDMA communication system which comprises a transmitting section that transmits a location registration request signal to a base station, and a receiving section that receives an acknowledge signal transmitted from the base station after the location registration request signal from the transmitting section is received by the base station. A control section prohibits the power supply to the receiving section for a predetermined period of time if the acknowledge signal from the base station is not received within a predetermined period of time after the location registration request signal has been transmitted.

Claims

1. A method for controlling a mobile station for a CDMA mobile communication system including a transmitter configured to transmit a location registration request signal to a base station being acquired by the mobile station and a receiver configured to receive an acknowledge signal transmitted, in response to the location registration request signal, from the base station, the method comprising

disabling the receiver by controlling on-off of a switch provided between a power supply and the receiver and disabling transmission of the location registration request signal to the base station for a first time period when the receiver does not receive the acknowledge signal within a second time period of the transmission of the location registration request signal and enabling the receiver and enabling transmission of the location registration request signal to the base station when the first time period elapses,

wherein the first time period is increased stepwise as time elapses.

2. A mobile station for CDMA mobile communication system, comprising:

a transmitter configured to transmit a location registration request signal to a base station being acquired by the mobile station;

a receiver configured to receive an acknowledge signal transmitted, in response to the location registration request signal, from the base station; and

a controller configured to disable the receiver by controlling on-off of a switch provided between a power supply and the receiver and to disable transmission of the location registration request signal to the base station for a first time period when the receiver does not receive the acknowledge signal within a second time period of the transmission of the location registration request signal and configured to enable the receiver and to enable transmission of the location registration request signal to the base station when the first time period elapses,

wherein the first time period is increased stepwise as time elapses.

3. A mobile station for CDMA mobile communication system, comprising:

a transmitter configured to transmit a location registration request signal to a base station being acquired by the mobile station;

a receiver configured to receive an acknowledge signal transmitted, in response to the location registration request signal, from the base station; and

a controller configured to disable the receiver by controlling on-off of a switch provided between a power supply and the receiver and to disable transmission of the location registration request signal to the base station for a first time period when the receiver does not receive the acknowledge signal within a second time period of the transmission of the location registration request signal and configured to enable the receiver and to enable transmission of the location registration request signal to the base station when the first time period elapses,

wherein the controller suspends power supply to the receiver for the first time period when the receiver does not receive the acknowledge signal within the second time period of the transmission of the location registration request signal and resumes the power supply to the receiver when the first time period elapses, and

wherein the first time period is increased stepwise as time elapses.