KR970001870B1 - Method for supplying power to the cellular phone - Google Patents

Abstract

A terminal power supply method is provided to effectively supply power to a portable terminal of digital european cordless telecommunications (DECT) after charging by a given cycle, thus increasing the period of reception standby for the terminal. The inventive method can assure long period of reception standby with once charging.

Description

Power supply method of terminal

1 is a block diagram showing an embodiment of a general DECT terminal.

FIG. 2 is a flow chart showing step by step an embodiment of general DECT terminal processing of FIG. 1 according to the DECT standard. FIG.

Figure 3 is a flow chart showing step by step an embodiment of a power supply method of a terminal according to the present invention.

The present invention relates to a portable terminal of DECT (Digital European Cordless Telecomm-unications) method, and more particularly, to a power supply method of a terminal suitable for efficiently supplying power to a portable terminal after charging.

1 is a block diagram illustrating an embodiment of a general DECT terminal, and includes a central processing unit (CPU) 2 having a baseband processing function for controlling overall operation of the terminal, A power supply unit 4 controlled by the central processing unit 2 to indicate the current power state of the terminal, a power supply unit 6 controlled by the central processing unit 2 to supply power for operating the terminal to the terminal system; A microphone 8 for converting a voice signal into an electrical analog voice signal, an analog-digital converter 10 for converting an analog voice signal of the microphone 8 into a digital signal, The digital voice signal of the analog-to-digital converter 10 is converted into ADPCM (Adaptive Differential Pulse Cole Modulation) data to be input to the Digital Signal Processing (DSP) Processor 14. A digital signal processing processor 14 which communicates with an ADPCM-PCM (Pulse Code Modulation) converter 12 and the central processing unit 2 to digitally process digital signals according to a speech coding method used in the DECT standard. A PCM-ADPCM converter 16 for converting ADPCM data of the digital signal processing processor 14 into PCM data, and a digital-analog converter 18 for converting PCM data of the PCM-ADPCM converter 16 into an analog signal. ), A speaker (20) driven by the analog signal of the digital-to-analog converter 18 to output voice, and a carrier for modulating voice data encoded by ADPCM from the central processing unit 2 The signal synthesizer 22 for amplifying the signal, the signal amplifier 24 for amplifying the modulated signal of the signal synthesizer 22 to a level defined by DECT, and the amplified signal of the signal amplifier 24. It propagates in the atmosphere and transmits high frequency signals in the atmosphere. An antenna 26 for fastening, a low noise amplifier 28 for amplifying low noise by receiving a high frequency signal of a fixed station received through the antenna 26 during a reception period, and a low noise amplifier 28 The intermediate frequency converter 30 converts the received high frequency signal into an intermediate frequency, and the original signal transmitted from the intermediate frequency of the intermediate frequency converter 30 is extracted and applied to the central processing unit 2. A key unit 34 for inputting a call to the central processing unit 2, the central processing unit 2, a screen display unit 36 for receiving a signal from the central processing unit 2 to display a bell state, and a central processing unit. Electrically Erasable Programmable Read Oney Momory (EEPROM) 40 which receives the signal of the device 2 and records the initial state of the volume such as key input and bell and various telephone numbers, and the central processing unit 2. Data for the operation of the entire processor Rom which (Read Only Memory; RAM (42) and a RAM (Read Access Memory (RAM)) 14 which temporarily stores the parameters for the longitudinal operation by the central processing unit 2.

Referring to FIG. 2, a general DECT terminal made in this way is as follows.

First, the display unit 4 indicates the current power state of the terminal controlled by the central processing unit 2 by using a light emitting element such as a light emitting diode (LED), so that the user can indicate the current power on / off state of the terminal. Make sure you know.

Next, the power supply unit 6 supplies power for operating the terminal controlled by the central processing unit 2, and the microphone 8 converts the voice signal by the user into an electrical analog voice signal, and converts the analog-digital conversion. The unit 10 converts the analog voice signal of the mitrophone 8 into a digital signal.

The ADPCM-PCM converter 12 converts the digital voice signal of the analog-digital converter 10 into ADPCM data and applies it to the digital signal processor 14, and the digital signal processor 14 performs central processing. It communicates with the device 2 and processes the digital signal according to the voice encoding method used in the DECT standard.

In addition, the PCM-ADPCM conversion unit 16 converts ADPCM data of the digital signal processing processor 14 into PCM data, and the digital-analog conversion unit 18 converts the PCM data of the PCM-ADPCM conversion unit 16 to analog. The signal is converted to a signal, and the speaker 20 outputs a voice by the analog signal of the digital-analog converter 18 so that the user can hear the voice.

Next, the signal synthesizing unit 22 receives the voice data encoded by the ADPCM from the central processing unit 2 and modulates it on a carrier for modulation of 1.8 GHZ for wireless transmission, and the signal amplifying unit 24 performs the signal synthesizing unit 24. The modulated signal at 22 is amplified to the level specified by DECT, and the antenna 26 propagates in the amplified atmosphere of the signal amplifier 24 and receives the signal in the atmosphere.

Accordingly, the low noise amplifier 28 receives the 1.8 GHz signal of the fixed station received through the antenna 26 during the reception period of the terminal and performs low noise amplification, and the intermediate frequency converter 30 of the low noise amplifier 28 The received frequency of 1.8 GHz is converted into an intermediate frequency of 110 MHz, and the demodulator 32 extracts the original signal transmitted from the intermediate frequency of 110 MHz of the intermediate frequency converter 30 and applies it to the central processing unit 2. do.

The key input unit 34 inputs a call to the central processing unit 2, and the screen display unit 36 receives a signal from the central processing unit 2 and uses a display element such as an LCD (Liquid Crystal Display). The bell state 38 is displayed, and the buzzer 38 receives a signal from the central processing unit 2 to generate a special sound generated for use of a terminal such as a key input and a bell so that the user can hear it. ) Records the initial state of the volume and various switching numbers by the central processing unit 2, and the ROM 42 stores the non-volatile data for the operation of the entire terminal by the central processing unit 2, 44 temporarily stores the parameters for longitudinal operation by the central processing unit 2.

FIG. 2 is a flowchart showing step by step an embodiment of the general DECT terminal processing of FIG. 1 according to the DECT standard, that is, an algorithm of the central processing unit 2.

First, when the power is turned on, the initial value of the hardware is read from the ROM 42 or EPI rom 40 to initialize the respective hardware, and the RAM 44 is inspected and cleared. After operating a diagnostic program or the like to check the basic abnormality of the hardware, the radio station receives the signals from the wireless channels 0 through 9 through 10 (100, 102, 104, 106, 108, 110, and 112).

Next, the received electric field strengths for all 10 radio channels are examined to determine the connection to the radio station which emits the strongest radio signal among them, and the criteria for various timings inside the terminal are based on the signal sent from the radio station. (114).

Thereafter, the radio station checks whether there is an empty time slot by checking a time slot usage state of the wireless fixed station, and then performs a registration procedure (116).

At this time, the terminal enters the standby state after completing the registration procedure, the operation of the terminal proceeding in the standby state can be divided into four.

First, the terminal checks the presence of a paging signal from the fixed station, and if there is a paging signal, first accesses a MAC (Mediun Access Control) layer to secure a time slot use right of the wireless channel. The connection of the DLC (Data Link Control) layer and the network (Network) layer are sequentially performed to form a call path and then proceed with the call (118, 120, 122, 124, 126).

Subsequently, due to any one call disconnection situation, network layer disconnection, DLC layer disconnection, and MAC layer disconnection are performed to release the radio channel and enter the standby state again (128, 130, 132).

On the contrary, if there is no paging signal, the terminal user checks a connection request to a specific subscriber, and if a request occurs, if there is an empty time slot by checking the existence of an empty time slot to secure use of the time slot. Immediately requests the use of the time slot to the station, and if the time slot is not empty, waits until the time delay does not exceed the value set until another user's use of the time slot ends. When another user's use of the time slot ends, an attempt is made to access the MAC layer using the time slot (134, 136).

Subsequently, access to the MAC layer is secured to secure the time slot use right of the wireless channel, and access to the DLC layer and network layer are sequentially performed to form a call path and then proceed with the call (138, 140, and 142).

Subsequently, due to any one call disconnection situation, the network layer is disconnected, the DLC layer is disconnected, and then the MAC layer is disconnected to release the radio channel and enter the standby state again (144, 146, 148).

At this time, after there is no paging signal and the user's request for transmission or the processing (step 132 or step 148) is completed, the state check in the terminal is performed.

A typical internal condition check is the voltage level check of the supply battery.

First, input the voltage of the battery through a circuit that converts an analog signal into a digital signal to check whether it is at an appropriate level. If it is below the appropriate level, a battery charge warning signal is generated and a message such as, for example, charging is required to the user. It informs the state of the need for charging and receives a signal from the fixed station to check whether it maintains an appropriate signal level or whether the signal level is too low to attempt to connect to an adjacent fixed station (150, 152, 154, 156, 158).

If the signal level of stationary station is -83dBm or more, the state of the stationary station currently registered is maintained as it is, and if the signal level drops below a certain value and a mobile connection to the previous station is required, the radio channel is switched from 0 to 9. First, a process of deregistration of releasing a state registered in a current fixed station is performed (160).

Subsequently, the radio station receives the signals from the radio station 0 again through radio channels 0 to 9 (162, 164, 166, 168, 170, 172).

Therefore, the received electric field strengths for all 10 radio channels are examined to determine the connection to the radio station which emits the strongest radio signal among them, and the criteria for various timings in the terminal are based on the signals sent from the radio station. (174,176)

Thereafter, the radio station checks whether there is an empty time slot by checking the time slot usage state of the radio station, and then performs a new registration procedure (116).

That is, in the standby state, as described above, it is determined whether or not there is a paging signal from the fixed station, and the processing thereof is performed, the transmission request of the user is processed, and the processing thereof is performed, and it is checked whether the battery voltage is at an appropriate level. The basic form of the entire DECT terminal processing is to perform a process for it, inspect the signal level of the fixed station, proceed with it, and perform various timer processing of other terminals.

According to the conventional technology, the power on / off state switching of the terminal is made by the user's will.

In other words, if the user wants to put in the standby state, the power switch is turned on so that the terminal is in the standby state. If the user does not want to receive the standby state or wants to save the power of the battery once charged, the power switch is turned off.

In general, the usage time by a single charge of the portable terminal is limited, can usually maintain the reception standby state for 10 to 20 hours, and can talk for 1 to 2 hours.

In the conventional technology, if the terminal's charging facility is lived in an unoccupied island area, a mountain area, a camping place, or the like for several days or more, the terminal is used for about one day until it is relocated to the rechargeable area and recharged. There is a problem such as not being able to.

The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a power supply method of a terminal capable of supplying power of a DECT terminal at a predetermined cycle to increase a reception waiting period of the terminal.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention for achieving the above object is as follows.

First, the description of FIG. 2 will not be repeated, and will be referred to the present invention as follows.

Referring to FIG. 3, FIG. 3 is a flowchart showing step by step an embodiment of a method for supplying power to a terminal according to the present invention. First, the power is periodically supplied after performing a hand over step 176. If you want to set the on / off time of the terminal power supply, respectively, and turn off the power of the terminal (200, 202, 204).

Next, the current time is checked to turn on the terminal when the current time is on, so that normal reception and call is made. When the current time is off, the power is turned off (206, 208, 210, 212, 214, 216, 218).

In this case, when it is determined in the off time determining step 216 that the present time is not the off time, the process returns to the registration performing step 116.

For example, the terminal starts from 0 o'clock on a single charge, sets the standby standby state by power on to 0:30, and then sets the power off state to 0:59:59, 1 Set the receive standby state to 1:30, starting at the hour, and then set the power off state to 1:59:59, and set the standby state to 2:30, starting at 2 o'clock. And then set the power-off state to 2:59:59, start at 3 o'clock, set the standby state to 3:30, and then set the power-off state to 3:59:59. Start at 4 o'clock, set the standby state to 14:30, and then set the power off state to 14:59:59, and start at 5 o'clock and set the standby state to 5:30. To the power off phase If you repeat the 30-minute reception standby state for the first half hour and the power-off state for the second half hour, for example, set the time to 5:59:59 seconds, the first half hour can be received continuously from 0 o'clock to 10 o'clock. The reception standby state is increased from 0 o'clock to 20 o'clock while repeating the 30-minute reception standby state and the latter 30-minute power-off state.

As described above, the present invention has an effect of waiting for a long time even with a single charge by periodically supplying power of the terminal.

Claims (1)

Accepting all channels of the fixed station (100, 102, 104, 106, 108, 110, 112), and determining the connection to the strongest station sending the strongest signal and synchronizing to be the reference for various timings in the terminal based on the signal sent from the fixed station ( 114), if there is an empty time slot of the fixed station, performing a registration procedure (116); if a paging signal is present, secures a channel's time slot usage rights, forms a passageway, and then proceeds with the call. Steps 118, 120, 122, 124, 126, and when the call is disconnected, the channels are de-licensed and put back on standby, and when there is no forget signal, a request for access to a particular subscriber of the terminal user is made. If there is one, the slot is requested to use the time slot and the time slot is empty If not, wait until the end of use of another user's time slot does not exceed the value set, and then use the time slot when another user has finished using the time slot. Step (134,136) of attempting to access the network layer; proceeding to access the MAC layer to secure the time slot usage rights of the channel and proceeding with the call; After the other steps (144, 146, 148), the paging signal and the user's transmission request is not completed, or after completing step 132 or step 148, the step of checking the internal state of the terminal, and the battery charge warning when the battery level is below an appropriate level Generate a signal and receive a fixed station signal to maintain the proper signal level or Step (150, 152, 154, 156, 158) to determine whether a connection to an adjacent fixed station should be attempted, and if the signal level of the fixed station is appropriate, maintain the signal state of the currently registered station if it is not appropriate; A step (160) of releasing a state registered in the step S, a step (162, 164, 166, 168, 170, 172) of accepting all channels of the stationary station, and checking the electric field strength of the channel to determine the connection to the station which emits the strongest radio signal among them. In the terminal comprising the steps (174,176) to synchronize the reference to the various timings in the terminal based on the signal sent from the fixed station, if you want to periodically supply the power of the terminal after performing the handover step (176) Set the terminal's power on / off time respectively and turn off the terminal's power. Steps 200, 202 and 204; And turning on the terminal to wait for reception and making a call when the current time is on, and turning off the terminal when the current time is off (206, 208, 210, 212, 214, 216, 218).