KR0121963B1 - Method for transferring place of a cellular phone - Google Patents

Abstract

A position transmitting method for the terminal where provide the terminal user with the high delicate position information where displays the distance between the appropriate terminal, and the number of the registered mobile base station and the registered base station depending on the signal intensity between the nearest mobile base station and the terminal.

Description

How to display the location of the terminal

The present invention relates to a portable terminal of the DECT (Digital European Cordless Telecomm-unication) method, and more particularly, to a method for transmitting a location of a terminal suitable for transmitting a location of a current terminal to a counterpart.

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

As shown in the figure, the DECT terminal includes a control block for checking the transmission / reception status of a voice signal and various processing of transmission / reception data, and a data input / output block and a receiver (ie, a speaker) for performing data transmission / reception with a base station (not shown). And a voice modulation demodulation block for demodulating the voice signal provided by the original signal before modulation and modulating the voice signal input through the transmitter (ie, the microphone).

Referring to FIG. 1, the control block includes a central processing unit (CPU) 2, a power display unit 4, a power supply unit 6, a key input unit 34, a screen display unit 36, a buzzer 38, PROM (EEPROM) 40, ROM (ROM) 42, and RAM (RAM) 44.

Here, the central processing unit 2 performs a baseband processing function for controlling the overall operation of the terminal, for example, initializing the terminal, checking a received signal strength with a neighboring base station, and connecting and releasing a network. .

Next, the power display unit 4, which can be constituted by a light emitting element such as an LED, for example, displays the power on / off state of the terminal under control from the central processing unit 2, The power supply unit 6 is a rechargeable battery, for example, and is controlled by the central processing unit 2 to supply power for operation of the terminal.

In addition, the key input unit 34 is a terminal keypad composed of a plurality of numeric keys and function keys, and operated by various keys (for example, numeric keys for dialing, transmission keys for transmitting a dial tone signal, etc.) by a user. The key signal is generated and provided to the central processing unit 2, and the buzzer 38 generates a corresponding key input signal sound when various keys of the key input unit are operated by the user, and the screen display unit ( 36) may be configured as, for example, an LCD panel, and performs an initial status display, a reception sensitivity display, and a counterpart phone number display to be called.

On the other hand, EPIROM 40 stores the initial volume information of the terminal, information of the unspecified number of the phone number to be stored by the user, etc. ROM 42 stores a program for controlling the overall operation of the terminal, RAM At 44, parameters necessary for the terminal to perform various signal processing operations are stored.

Referring back to FIG. 1, the data input / output block includes a signal synthesizer 22, a signal amplifier 24, an antenna 26, a low noise amplifier 28, an intermediate frequency converter 30, and a demodulator 32. ).

Here, the signal synthesizing unit 22 receives the speech data encoded by the ADPCM (Adaptiv Differential Pulse Code Modulation) signal from the central processing unit 2 when the user performs a telephone call using the terminal and modulates the signal into a radio transmitting signal. For example, the modulation is carried on a carrier for modulation of 1.8 GHz, and the signal amplifier 24 amplifies the modulated signal provided from the signal synthesizer 22 to a level defined by DECT, and the amplified modulated signal Is transmitted through the antenna 26 and transmitted to a base station (not shown).

On the other hand, the low noise amplifier 28 is a high-frequency signal transmitted to the base station and received through the antenna 26 during the receiver of the terminal, that is, when the power of the terminal is turned on, for example, the received signal of the 1.8GHz band The intermediate frequency converter 30 converts the received signal having the frequency of the level amplified 1.8 GHz into an intermediate frequency signal of 110 MHz. In addition, the demodulator 32 restores the original signal before channel modulation, and provides the restored signal (e.g., the voice signal of the call partner) to the central processing unit 2.

Referring back to FIG. 1, the voice modulation / demodulation block includes a microphone 8, an analog / digital converter 10, an ADPCM / PCM (Adaptive Differential Pulse Modulation / Pulse Code Modulation) converter 12, and a digital signal processing P processor. 14, a CM / ADPCM converter 16, a digital / analog converter 18, and a speaker 20.

At this time, the microphone 8 is mounted on the calling side of the terminal to convert the user voice signal input during the telephone call into an electrical analog signal, and the analog / digital converter 10 digitally converts the analog voice signal at a predetermined sampling period. The signal is converted into a signal, and the ADPCM / PCM converter 12 converts the digital voice signal into an ADPCM signal and provides the digital signal processing processor 14 of the next stage.

On the other hand, the digital signal processor 14 is capable of adding a code for error detection and correction at the receiving end to the converted ADPCM signal to be transmitted from the ADPCM / PCM converter 12, In addition, when the digital voice signal received through the antenna is provided from the CPU 2, error correction is performed based on the error correction code added to the received digital voice signal and then provided to the PCM / ADPCM converter 16. do.

In addition, the PCM / ADPCM conversion unit 16 converts the received ADPCM data (e.g., the opposite voice signal) provided from the digital signal processing processor 4 into PCM data, and the converted PCM data is digital. It is output to the speaker (receiving side) converted into an analog signal via the analog converter 18.

Next, a process of performing various signal processing according to the DECT standard using the DECT terminal having the above-described configuration will be described.

2 is a flowchart illustrating a process of performing various signal processing according to the DECT standard using a DECT terminal.

First, when the power is turned on, the initial value for the hardware (Hardware) is read from the ROM 42 or EPI rom 40 to initialize each hardware, and the RAM 44 is inspected and cleared. After checking the basic abnormality of the hardware by operating a diagnostic program or the like, the signal of the non-probable base station is received in 10 radio channels 0 through 9 (steps 100, 102, 104, 106, 108, 110 and 112).

Next, the received electric field strengths of all 10 radio channels are examined to determine the connection to the wireless base station which emits the strongest radio signal, and the various timings within the terminal are determined based on the signal sent from the wireless base station. Motivate to be the reference (step 114).

After that, the time slot usage state of the radio base station is examined to check whether there is an empty time slot, and then a registration procedure is performed (step 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 base station, and if there is a paging signal, first accesses a medium access control (MAC) 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 (steps 118, 120, 122, 124, 126).

Subsequently, the disconnection of the network layer, the DLC layer, and the MAC layer are subsequently performed according to any one call disconnection state, thereby releasing the use of the proactive channel and returning to the standby state (steps 128, 130, and 132).

On the contrary, if there is no paging signal, the terminal user examines 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. If the time slot is not empty, the base station makes a request for the use of the time slot. If the time slot is not empty, it waits as long as the time delay does not exceed the set value until the use of another user's time slot ends. When the use of another user's time slot ends, an attempt is made to access the MAC layer using the time slot (steps 134 and 136).

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

Thereafter, the network layer is disconnected, the DLC layer is disconnected, and then the MAC layer is disconnected due to any one call disconnection state, thereby releasing the license of the wireless channel and entering the standby state again (steps 144, 146, 148).

At this time, after there is no paging signal and the user's transmission request or the processing (step 132 or step 148) is completed, the internal state check is performed. A typical internal state test includes a voltage level test of a power battery.

First, the battery voltage is input through a circuit for converting an analog signal into a digital signal to check the proper level. When the voltage is lower than the proper level, a battery charge warning signal is generated to display a message such as, for example, the need for charging. Display to inform the user of the need for charging and check whether the signal from the base station is maintained to maintain an appropriate signal level or if the signal level is too low to attempt to connect to an adjacent base station (steps 150, 152, 154, 156 and 158).

As a result of the check in the step 158, if the signal level of the base station is more than -83dBm, the signal state of the currently registered base station is maintained as it is, and the signal level drops below a specific value and a mobile connection to the previous base station is required. In this case, 10 radio channels are received from 0 to 9 (steps 160, 162, 164, 166, 168, 170 and 172).

Therefore, the received electric field strengths of all 10 wireless channels are examined to determine the connection to the wireless base station which emits the strongest wireless signal, and the various timings within the terminal are determined based on the signal transmitted from the wireless base station. Motivate to be the reference (steps 174,176).

After that, the time slot usage state of the base station is checked to determine whether there is an empty time slot, and then handover is newly performed.

That is, in the standby state, as described above, the base station determines whether there is a paging signal and proceeds with the processing, examines the user's transmission request and proceeds with the processing, and examines whether the battery voltage is at an appropriate level. The basic form of the overall DECT terminal processing is to process the signal, check the signal level of the base station, proceed with the processing, and perform various timer processing of the other terminal.

Through the above-described process, the conventional DECT terminal transmits the unique number of the base station to the counterpart and informs the counterpart by limiting the current location of the terminal to a distance of about 300m, which is a signal delivery distance of the base station.

However, in such a conventional technique, although the position of the signal reaching distance of the base station in the range of about 300 m is known, a means for realizing the position of the terminal in an urgent case is presently available. There is no situation.

Accordingly, the present invention has been made in view of the above-mentioned points, and based on the signal strength between the nearest wireless base station and the terminal, the terminal is provided with a precise position information indicating the registered wireless base station number and the distance between the registered wireless base station and the corresponding terminal. Its purpose is to provide a terminal location display method that can be provided to the user.

In order to achieve the above object, the present invention has a display screen for displaying various types of information, and checks the strength of radio signals transmitted from a plurality of radio base stations having a predetermined communication radius, thereby identifying a radio base station having the largest reception strength. A method for displaying the location in a terminal registered as a fixed station of the terminal, the terminal storing the fixed station number in a predetermined space of the memory when the terminal maintains a preset communication range for a predetermined time from the registered station. First step; A second value for calculating a distance value between the stored fixed station and the corresponding terminal by converting the strength of the received signal transmitted and received from the stored fixed station into a predetermined distance unit, and storing the calculated distance value information in a predetermined space of the memory; step ; Checking whether the distance information request signal is inputted from the keypad of the terminal according to a user's key operation, and repeating each step at a preset time interval when the fastening and the user distance information request signal are not present, changing the registration of the wireless base station and A third step of updating distance value information; A fourth step of extracting and displaying the fixed station number and distance value information stored in the memory if the user distance information request signal is found as a result of the check in the third step; And checking whether the user distance information confirmation signal is input in the display state on the display screen, and if it is determined that the fastening and the user distance information confirmation signal have been input, turn off the display state and repeat the above steps. When there is no input of the user distance information confirmation signal, the terminal position display method according to the fifth step of continuously updating the distance value information updated at the predetermined time interval on the display screen is provided.

1 is a block diagram of a general DECT terminal suitable for applying the terminal position display method according to the present invention.

2 is a flowchart illustrating a process of performing various signal processing according to the DECT standard by using the DECT terminal shown in FIG.

3 is a flowchart illustrating a process of detecting a location between a nearest base station and a corresponding terminal and displaying the same according to a preferred embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the terminal position display method according to the present invention, the central processing unit 2, the antenna 26, the low noise amplifier 28, the intermediate frequency converter 30, the demodulator of the components shown in FIG. 32, a key input unit 34, a screen display unit 36, and an Y pyrom 40 may be implemented.

That is, when the terminal receives a radio signal transmitted from a radio base station (or a fixed station) not shown in the drawing, the strength level of the received base station transmission radio signal is checked, and the checked strength level is converted into a distance value, for example. When the radio base station can communicate within a radius of 300m, it converts the signal strength received from the terminal into a distance value of 20m or 30m as an example and stores it in memory along with the base station (i.e., fixed station) number. In other words, when there is a request for distance information between fixed stations), the proximity base station number and distance information are displayed on the display unit. In this case, the distance information between adjacent base stations converted into distance values and stored in the memory may be continuously updated at predetermined time units, for example, 3 minutes and 5 minutes.

In other words, the signal transmitted from the wireless base station to which the terminal is registered and received through the antenna 26 is an original signal before channel coding through the low noise amplifier 28, the intermediate frequency amplifier 30, and the demodulator 32. When the signal is received from the wireless base station, the central processing unit 2 sets the strength of the received signal at the same time as the base station number registered with the corresponding terminal. It is converted into a distance value (distance information with a neighboring base station (i.e., a registered base station)) and continuously updated in a predetermined time unit, and stored in the ypyrom 40.

Next, in the CPU 2, when the distance information request signal of the user is input through the key input unit 34 while the proximity base station number and the distance information thereof are stored, the central processing unit 2 enters the EPI 40. The base station number and the distance information stored are retrieved and provided to the screen display unit 36. The screen display unit 36 simultaneously transmits the adjacent base station in a predetermined distance unit (for example, 20m unit, 30m unit, etc.) with the corresponding base station number. Distance information between the terminal and the corresponding terminal is displayed. Accordingly, the user can know in more detail which base station the terminal he currently owns is registered and how far the base station is maintained from the base station (the adjacent base station).

3 is a flowchart illustrating a process of detecting and displaying a location between a nearest base station and a corresponding terminal according to a preferred embodiment of the present invention.

Referring to FIG. 3, the strength of a fixed station signal received in a call or called standby state in which a registration to a fixed station (i.e., a base station having the highest received signal strength) is completed maintains a predetermined level for a predetermined time. And converts the strength of the signal received from the fixed station into a distance value (distance information between the terminal and the fixed station) in a predetermined unit, and converts the converted distance value together with the fixed station number (FMID) of the YPyrom 40. To the area (steps 200, 202, 204).

At this time, the above-described process is continuously repeated at predetermined time intervals while the reception strength maintains the predetermined appropriate level, and the distance value which is calculated each time and stored in the Y pyrom 40 is most recently calculated. Is continuously updated with the specified distance value. In addition, when the reception strength of the fixed station is not maintained at an appropriate level for a predetermined time, the process returns to step 116 described above to repeatedly perform subsequent processes (base station registration and registration update, reception strength detection and update, etc.). do.

Next, the central processing unit 2 receives the user distance information request signal from the key input unit 34 while the distance information indicating the distance between the terminal and the fixed station is stored in the Y. pyrom 40 through the above process. It is checked whether it is input (step 206).

If it is determined in the step 206 that there is no user distance information request signal from the key input unit 34, the process returns to step 116 described above (e.g., registration of a base station or Registration update, detection and update of received signal strength) are repeatedly performed.

On the other hand, if there is a user distance information request signal from the key input unit 34 as a result of the check in the step 206, the central processing unit 2 has fixed station number information and distance information currently stored in the EPI rom 40. The number of the station is displayed on the screen display unit 36 (step 208), and as a result, the station number is displayed on the screen display unit 36 together with the distance information of a predetermined distance unit (step 210). Therefore, the user can know the fixed station where the terminal he currently holds is registered and the distance between the terminal and the fixed station.

On the other hand, when the fixed station number and the distance information are displayed on the screen display unit 36 in response to the user distance information request signal as described above, the central processing unit 2 confirms the user distance information request from the key input unit 34. It is checked whether or not a signal (i.e., a fixed station number and a key signal for turning off the distance information currently displayed on the screen display unit 36) is input (step 212). If input, the current display state is turned off, and then the process returns to step 116 described above to repeat the process thereafter.

On the other hand, if it is determined that there is no input of the user distance information confirmation signal, the display state of the fixed station number and distance information is maintained as it is, and the displayed distance information is changed by changing the location information pointer. It continuously changes at a set time interval (eg, 3 minutes, 5 minutes, etc.) (step 214). That is, according to the present invention, the fixed station and the distance information are displayed on the screen display unit 36 while the distance information value is updated at predetermined time intervals through repeated execution of steps 208 to 214 until the user distance information confirmation signal is received. Is displayed on the screen.

Therefore, the user may know the distance between the fixed station and the holding terminal and the fixed station where the terminal is held at any time.

According to the present invention as described above, according to the user's request by displaying the base station number registered by the terminal as the location information of the terminal and the distance information converted from the signal strength received from the base station into a distance value on the terminal screen The user can more accurately know the distance (distance) between the base station to which the terminal owned by the user and the registered base station and the terminal.

Claims (1)

It has a display screen for displaying various types of information, and checks the strength of radio signals transmitted from a plurality of radio base stations having a predetermined communication radius and registers the location of the base station having the largest reception strength as its fixed station. A display method comprising: a first step of storing a fixed station number in a predetermined space of a memory when a corresponding signal strength of a received station from a registered station is maintained for a predetermined time; A second value for calculating a distance value between the stored fixed station and the corresponding terminal by converting the strength of the received signal transmitted and received from the stored fixed station into a predetermined distance unit, and storing the calculated distance value information in a predetermined space of the memory; step ; It is checked whether the distance information request signal is inputted from the keypad of the terminal according to the user's key operation, and repeats the above steps at a predetermined time interval when there is no user distance information request signal. A third step of updating distance value information; A fourth step of extracting and displaying the fixed station number and distance value information stored in the memory if the user distance information request signal is found as a result of the check in the third step; And checking whether or not the user distance information confirmation signal is input in the display state on the display screen. If it is determined that the user distance information confirmation signal is input, the display state is turned off, and the above steps are repeatedly performed. And a fifth step of continuously displaying the distance value information updated at the predetermined time interval and continuously displaying the user's distance information confirmation signal on the display screen.