KR970001872B1 - Method for watching circumference of the cellular phone - Google Patents

Abstract

The method for monitoring a circumference of a terminal comprises the steps(200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220) of receiving all channels if a signal level of a fixed station is inappropriate, selecting a fixed station concerned with the strongest signal level, registering for the selected/fixed station and clarifying whether there is another new connector in the registered/fixed station; the steps(222, 224, 226, 228, 230) of outputting an alarm sound and message for notifying whether there is a terminal accompanied by its own terminal over a constant time in case that the signal level of the fixed station is appropriate in a reception stand-by state or there is the new connector in the currently registered fixed-station; and the steps(232, 234) of performing a normal calling function if there is no the new connector or the accompanied terminal, or there is a paging signal after an output of the alarm sound and message, and maintaining the reception stand-by state if there is no the paging signal.

Description

How to monitor the surroundings of the terminal How to supply power to the 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.

3 is a flowchart showing step by step an embodiment of a method for monitoring the periphery of a terminal according to the present invention.

The present invention relates to a portable terminal of the DECT (Digital European Cordless Telecomm-unications) method, and more particularly, to a method for monitoring the periphery of a terminal suitable for monitoring the periphery of a user carrying the terminal.

In this regard, FIG. 1 is a block diagram illustrating an embodiment of a general DECT terminal, including 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 Code Modulation) data and 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 an 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). Amplified signal of the signal synthesizer 22, amplified signal 24 of the signal synthesizer 22, and amplified signal amplified by the DECT. Propagates in the air, An antenna 26 for receiving, a low noise amplifier 28 for receiving low frequency amplification of a high frequency signal from a fixed station received through the antenna 26 during the 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. A buzzer 38 for generating a special sound generated for use of a terminal such as a key input and a bell by receiving the signal of the device 2, and the initial state of the volume and various telephones under the control of the central processing unit 2 Electrically erasable P recording the number a rogrammable Read Oney Momory (EEPROM) 40 and a ROM for storing data for operation of the entire processor by the central processing unit 2; RAM) and a RAM (Read Access Memory (RAM)) 44 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 central processing unit 2 has a baseband processing function for controlling the overall operation of the terminal, and the power display unit 4 is controlled by the central processing unit 2 to indicate the current power state of the terminal. By using a light emitting device such as) so that the user can know the current state of the power on / off of the terminal.

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 converter 16 converts ADPCM data of the digital signal processing processor 14 into PCM data, and the digital-analog converter 18 converts the PCM data of the PCM-ADPCM converter 16 into 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 1.8GHZ signal of the fixed station received through the antenna 26 during the reception period of the terminal to low noise amplification, and the intermediate frequency converter 30 of the low noise amplifier 28 The received frequency of 1.8GHZ is converted into an intermediate frequency of 110MHZ, and the demodulator 32 extracts the original signal transmitted from the intermediate frequency of 110MHZ 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 base station receives signals from the radio channels 0 to 9 over 10 (100, 102, 104, 106, 108, 110, 112).

Next, the received electric field strengths of all ten radio channels are examined to determine the connection to the wireless base station which emits the strongest signal among them, and the criteria of various timings in the terminal are determined based on the signal sent from the wireless base station. To be as motivated as possible (114).

After that, by checking the time slot usage state of the radio base station, it is checked whether there is an empty time slot, and then a registration procedure is performed (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, the network layer is disconnected, the DLC layer is disconnected, and then the MAC layer is disconnected to release the license of the unvoiced 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 for converting an analog signal into a digital signal and check whether it is at an appropriate level. If it is below the appropriate level, a battery charge warning signal is generated to display a message, for example, a need for charging, to the user. It informs the charging condition and checks whether the signal from the fixed station is maintained to maintain 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 fixed station's signal level is -83dBm or more, it maintains the signal status of the currently registered station as it is, and if the signal level drops below a certain value and a mobile connection to the previous station is required, the wireless channel can be 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 examined and the processing thereof is performed, and whether the battery voltage is at an appropriate level. The basic form of the entire DECT terminal processing is to inspect and proceed with the processing, inspect the signal level of the fixed station, proceed with the processing, and perform various timer processing of the other terminal.

The present invention adds a function of monitoring the surroundings of the terminal to such a conventional terminal so that the user carrying the terminal can monitor the user carrying the terminal when the user carrying the other terminal follows. It is an object of the present invention to provide a method for monitoring the vicinity of a terminal.

Hereinafter, described in detail by the accompanying drawings an embodiment of the present invention as follows.

Referring to FIG. 3, a flowchart illustrating a step-by-step embodiment of a method for monitoring the periphery of a terminal according to the present invention.

First, if the signal level of the fixed station is not appropriate in the reception standby state, all 10 channels from channel 0 to channel 9 are stored and the signal level for each channel is stored. Register and check whether there are other new accessors in the registered fixed station (200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220).

In contrast, if the signal level of the fixed station is appropriate in the reception standby state or if the new accessor is present in the currently registered fixed station, and there is a new accessor, A warning sound and a message for notifying the user are output (222, 224, 226, 228, 230).

In addition, if there is no new accessor or there is a paging signal after outputting the warning sound and the message, normal call function is performed, and if there is no paging signal, the reception waiting state is maintained (232,234).

The DECT terminal configured as described above has a useful function of obtaining information necessary for identifying a situation of a surrounding watcher or a performer.

That is, if the fixed station can identify the unique number information of the DECT terminals occurring around the fixed station can give basic information about the situation such as monitoring or following the specific person to the terminal.

Of course, it is assumed that the performer and the supervisor also use the DECT terminal. In the future, as mobile phones become more popular than conventional phones, most people will be carrying mobile phones, and in such cases, people who have a specific unique number (hereinafter referred to as ID) for a long time will continue to appear or If you do, you will know that you are being followed.

In this way, if the situation of the terminal user around can be grasped, other useful information can be extracted using such a function.

That is, as described above, the present invention can perform a function of notifying that the DECT terminal user is monitored or notified by notifying the user of the DECT terminal when the terminal corresponding to a specific ID is continuously displayed.

Claims (1)

If the signal level of the fixed station is not appropriate, accepting all channels and selecting the strongest signal level to register with the selected fixed station and confirming whether there are other new accessors in the registered fixed station (200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220); When the signal level of the fixed station is appropriate in the reception standby state or whether there is a new accessor in the currently registered fixed station, and there is a new accessor, if there is a terminal accompanying the user's terminal for a certain period, Outputting a beep and a message (222, 224, 226, 228, 230); If there is no new accessor, there is no companion terminal, or if there is a paging signal after outputting the warning sound and the message, performing a normal call function, and if there is no paging signal, maintaining the standby state (232,234) method for monitoring the surroundings of the terminal .