Abstract:
A method for controlling power in a wireless telephone set. The method includes the steps of detecting whether or not any interrupting signals have been generated and performing a user mode for supplying power only to sections necessary for operations according to an origin of the interrupting signals, when said interrupting signals are generated.

Description:
PRIORITY 
     This application claims priority to an application entitled “Method for Controlling Power in Wireless Telephone Set” filed with the Korean Industrial Property Office on Dec. 29, 1999 and assigned Ser. No. 99-65724, the contents of which is hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to a wireless telephone set, and in particular, to a method for reducing power consumption in the wireless telephone set. 
     2. Description of the Related Art 
     Methods for increasing available time for using a wireless telephone set without charging the battery typically include increasing the capacity of the battery or employing a low-power circuit. However, these hardware solutions generally pose a limit in the increase of available time for using the wireless telephone set. 
     SUMMARY OF THE INVENTION 
     It is, therefore, an object of the present invention to provide a method for increasing available usage time of a wireless telephone set. 
     It is another object of the present invention to provide a method for increasing available usage time of a wireless telephone set without requiring additional dedicated circuitry or additional battery capacity. 
     To achieve the above objects, a method for controlling power in a wireless telephone set is provided. The method for controlling the power in the wireless telephone set includes the steps of detecting whether or not interrupting signals are generated and performing a user mode for supplying power only to sections necessary for operations according to the origin of the interrupting signals, when said interrupting signals are generated. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a schematic block diagram illustrating a construction of a wireless telephone set in accordance with a preferred embodiment of the present invention; 
         FIG. 2  is a flow chart illustrating a control of power in the wireless telephone set in accordance with a preferred embodiment of the present invention; 
         FIG. 3   a  is a graph illustrating chronological variances of a power consumption in the conventional slot mode; 
         FIG. 3   b  is a graph illustrating chronological variances of a power consumption in a normal mode; 
         FIG. 3   c  is a graph illustrating chronological variances of a power consumption in accordance with a preferred embodiment of the present invention; 
         FIG. 4  is a schematic block diagram illustrating a construction of the wireless telephone set in accordance with another preferred embodiment of the present invention; and 
         FIG. 5  is a flow chart illustrating a control of the wireless telephone set in accordance with another preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     A preferred embodiment of the present invention will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. 
     First, a description of the construction of a wireless telephone set in accordance with a preferred embodiment of the present invention will be made with reference to  FIG. 1 . 
     Signals received by an antenna  101  are input by a receiving section  105  through a filter  103 . The receiving section  105  down-converts and amplifies the input signals, and a demodulating section  107  demodulates the signals outputted by the receiving section  105  and outputs the signals to a signal-processing and control section  100 . The signal-processing and control section  100  processes the signals inputted through a microphone and outputs the signals through a modulating section  113  to a transmitting section  111 . Here, the transmitting section  111  outputs the signals to the antenna  101  by up-converting the frequency to a transmission frequency band and, amplifying and filtering the same. A phase lock loop  109  provides a local oscillating frequency to the transmitting section  111  and the receiving section  105 , so as to convert the received signals or the transmitted signals into the desired frequency. On the other hand, the signal-processing and control section  100  controls the signal processing and data receipt/transmission within each section of the wireless telephone set, and outputs signals for controlling the electric power supply to each section of the wireless telephone set according to the conditions of the wireless telephone set and a mode selection. 
     An operation of the wireless telephone set will be described hereinbelow in accordance with a preferred embodiment of the present invention with reference to  FIGS. 1 and 2 . 
     The signal-processing and control section  100  detects whether or not any interrupting signals have been generated in step  200 , e.g., when a call message or paging message has been received, an alarm timer has expired or a key is inputted by a key input section  119 . The generation of interrupting signals signifies that signals have been generated requiring the controller to turn on a power supply serving each corresponding section of the wireless telephone set. Each section is periodically polled, preferably every 320 ms, for a short duration, preferably 10 ms, to detect the presence of interference signals. 
     If any interrupting signals have been generated, the signal-processing and control section  100  changes a power control mode of the wireless telephone set into a user mode and turns on the power supply to corresponding sections of the wireless telephone set according to the generated interrupting signals in step  210 . For example, when a user inputs a key in order to edit telephone numbers in the wireless telephone set, power is supplied to a display section  123  and the key input section  119 . The user mode is processed according to the generated interrupting signals in step  220 . The power consumed in the user mode is less than the power consumed in the conventional transmission condition and the power consumed in the receiving condition of a slot mode. 
     The signal-processing and control section  100  detects whether or not the signals are being transmitted in step  230 . To be specific, if the user has requested the transmission of signals, the signal-processing and control section  100  supplies power to the transmitting section  111  and the receiving section  105  in step  240 , and performs transmitting operations in steps  240  and  250 . Otherwise, the procedure returns to step  200 . 
     When no interrupting signals are generated in step  200 , a slot mode is operated in step  270 , and therefore a sleeping condition and a receiving condition are periodically repeated in step  270 . Step  200  is also performed simultaneously. 
     A description of the chronological variances of power consumption according to a preferred embodiment of the present invention will be made with reference to  FIGS. 3   a  to  3   c.    
       FIG. 3   a  is a graph illustrating chronological variances of the power consumption during the slot mode. The slot mode is divided into a sleeping condition and a receiving condition, and repeats the above conditions at regular intervals. As shown in the graph of  FIG. 3   a , less power is consumed in the sleeping condition than in the receiving condition since power is supplied to only the sections necessary for control during the sleeping condition. 
       FIG. 3   b  is a graph illustrating power consumption variations during a conventional mode. Referring to  FIG. 3   b , the supplied power is regularly consumed. 
       FIG. 3   c  is a graph illustrating power consumption variations in accordance with the preferred embodiment of the present invention. Referring to  FIG. 3   c , the interrupting signals are generated in step  200  in the slot mode or the control mode, thereby setting the wireless telephone set into a user mode in step  210 . When the receiving condition is entered from either the user mode or the slot mode, the power is supplied to the receiving section  105  to perform the receiving operation. While in the user mode, however, less power is consumed than while in the slot mode. In other words, according to a preferred embodiment of the present invention, the user mode is added so as to minutely control the power in the wireless telephone set. For example, in a conventional telephone set when a user inputs a key while in the slot mode, the same amount of power is consumed as when in the receiving condition of the slot mode. However, according to the preferred embodiment of the present invention, the power is supplied to only the sections necessary for operations according to generation of the interrupting signals, thereby resulting in a reduction of the overall power consumption as shown in the graph of  FIG. 3   c . On the other hand, if the user mode is terminated, and there is a request for the transmission of signals, the power consumption consequently increases to that of the conventional telephone set as shown in  FIG. 3   c . After the transmission operation is terminated, the slot mode is again operated. 
     Although the receiving condition generated by receiving the call messages is not described above, a similar operation to that of the transmission condition is applicable to that case, as is evident. 
     Another preferred embodiment of the present invention is described herein below with reference to  FIGS. 4 and 5 . 
       FIG. 4  is a block diagram illustrating the construction of a wireless telephone set, which is similar to that of the wireless telephone set in  FIG. 1 . Referring to  FIG. 4 , additional hardware is added for controlling the power supply to the receiving section  105 . The power supply to the receiving section  105  is controlled by logically adding slot mode control signals outputted by a signal-processing section  100  and transmitting section control signals  129  by means of an OR gate  801 . To be specific, whenever the signals for turning-on the power supply are generated in the transmitting section  111  or the slot mode, the power is turned on. 
     With reference also to  FIG. 5 , an operation of the preferred embodiment of  FIG. 4  according to the present invention will be described. If the signals for turning-on the electric power supply to the transmitting section  111  is detected in step  500 , the receiving section  105  is turned on and the receiving operation is performed in step  520 . Otherwise, the phone detects whether or not the slot mode is under a receiving condition in step  510 . If the slot mode is under a receiving condition, the receiving section  105  is turned on and the receiving operation is performed in step  520 . If not, the procedure returns to step  500 . 
     As described above, the present invention provides an advantage of enhancing the available time for using a wireless telephone set by discriminating the control of the power supply to the wireless telephone set in accordance with the modes. 
     While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.