 Method for generating functional tests for a microprocessor having several operating modes and features |
| The problems outlined above are in large part solved by a method of generating functional tests for ... |
|
| Method and system for variable handoff hysteresis in a radiocommunication system |
| In the following description, for purposes of explanation and not limitation, specific details are ... |
|
| Method and apparatus for implementing handover in a mobile communications system |
| OF THE INVENTION In the invention, handovers due to cell loading are carried out in a centralised ... |
|
| Mobile communications system and mobile station therefor |
| Taking the above into consideration, an object of the present invention is to provide a mobile ... |
|
| On-demand information service using wireless cellular communications system |
| FIG. 2 is a diagrammatic view illustrating functional blocks in an embodiment of an audio/video-on-... |
|
| Cellular communications system featuring a central radio pool/traffic router |
| The above problems are substantially alleviated, and an advance is made over the teachings of the ... |
|
|
Power saving method for a mobile terminal
| Details |
Inventors: Arimitsu, Kazuhiro;
Assignee: NEC Corporation (Tokyo, JP)
Primary Examiner: Ramos-Feliciano; Eliseo
Assistant Examiner: Addy; Anthony S.
Attorney, Agent or Firm: Michael Best & Friedrich LLP
In a CDMA mobile terminal, the power supply voltage of the mobile terminal is compared with a first threshold voltage, and frequency monitor is performed at a normal rate if the power supply voltage is higher than the first threshold voltage, and frequency monitor is performed at 1/N of the normal rate if the power supply voltage is lower than the first threshold voltage, where N is equal to or greater than 2. Additionally, the power level of an RF signal received by the mobile terminal is compared with a first reference level, and frequency monitor is performed at the normal rate if the power level of the RF signal is lower than the first reference level, and frequency monitor is performed at 1/N of the normal rate if the power level of the RF signal is higher than the first reference level. |
|
DETAILED DESCRIPTION Referring to FIG.
1, there is shown a communications network incorporating a plurality of test equipment of the present invention.
As shown in FIG.
1, this mobile terminal includes an antenna 11, an RF receiver 12, a signal processor 13, a controller 14, an input/output circuit 15, a memory 16, a power supply 17, a battery voltage detector 18 and a frequency monitor 19.
Antenna 11 receives a downlink signal from a base station (not shown).
RF receiver 12 includes an RF amplifier for amplifying the received RF signal, which is down-converted in a down-converter to an intermediate frequency.
The IF signal is then converted in an A/D converter to a digital signal.
Receiver 12 further includes a field strength detector for detecting the field strength of the received RF signal and informs the controller 14 of the detected field strength value.
Signal processor 13 performs a despreading process on the digital signal from the A/D converter of the RF receiver 12 to produce a decoded output signal.
Controller 14 performs overall control of the mobile terminal including the processing of the decoded signal of the signal processor 13 and the operation of other circuits of the mobile terminal.
Input/output circuit 15 includes a microphone, a speaker, a display and a keypad, and manual control switches.
Memory 16 stores various information and a program for operating the mobile terminal.
The information stored in the memory 16 includes data for controlling the mobile terminal during a battery saving mode.
A rechargeable battery 17 supplies power to all circuitry of the mobile terminal.
Battery voltage detector 18 produces a digital value of the rechargeable battery 17 and feeds its output to the controller 14, which compares it with predetermined threshold voltages to determine the amount of power that remains in the battery.
Frequency monitor 19 controls on/off control of the receiver 12 and its scan rate according to a command signal from the controller 14.
The following is a description of the operation of the mobile terminal of FIG
|
|
Cell Phones 
