KR19980066103A - Alarm method of impossible transmission / reception of two-way radio call receiver - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

The present invention relates to a two-way radio call receiver.

I. The technical problem that the invention is trying to solve

The present invention provides a method of alerting a state in which two-way radio call receivers cannot transmit or receive.

All. Summary of Solution of the Invention

A method of displaying a state in which a transmission / reception is impossible in a bidirectional wireless call receiver having a display unit, the method comprising: a first process of checking whether a preamble is detected after power-on initialization; And if the detection is not confirmed within a limited time, the second step of causing the display unit to display 'non-receipt'; and if the detection of word synchronization within a limited time is confirmed, whether the system synchronization data is detected, And if the detection is not confirmed within the third step, causing the display unit to display 'no transmission'.

la. Important uses of the invention

Two-way radio call receiver is used to alert the user that transmission / reception is impossible.

Description

Alarm method for impossible transmission / reception of two-way radio call receiver

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for alerting a predetermined state in a two-way radio call receiver, and more particularly, to a method for alerting an impossible state of transmission and reception.

If the one-way radio call receiver does not receive a specific signal, i.e., word synchronization, required from the calling system for a specific time, it indicates that it is not currently received through the display unit. An example of the status display is to make the icon of the antenna type displayed at the time of reception disappear or vice versa.

Figure 1 shows the form of the POCSAG code used in the radio call receiver, which is currently in the form of a dedicated pager signal commonly used worldwide, and is specified in detail in CCIR Recommendation 584. One POCSAG code consists of preamble data consisting of 576 bits and a plurality of batch data contiguous. The preamble data is a code in which 1 and 0 are repeated for 576 bits. The one POCSAG code usually consists of 30 batches up to 60 batches. One batch consists of one wordsync data of 32 bits and eight frame data of 64 bits. The word sync data is 32-bit data of (7CD215D8) H and (01111100 11010010000101011101100) B. Each frame data is composed of 32 bits of address codeword and 32 bits of message codeword. Therefore, one batch is composed of 17 words of 544 bit data (17 words * 32 bits = 544 bits) in which 32 bits of data are one word.

2 is a diagram illustrating a data transmission form for a unidirectional radio call receiver. Reference numeral WS denotes word synchronization, AD denotes address data, and M denotes message data. According to this aspect, the radio call receiver first detects a specific pattern called preamble and then another specific pattern called word synchronization. Again, each address divided into eight groups of the corresponding users is searched for, and subsequent messages are displayed to the user through the display unit. At this time, whether or not the word synchronization is detected is a basis for determining whether or not the present state of the wireless page receiver can be received. This is because it is not possible to receive a message as well as an address because it cannot detect a predetermined word sync. This happens when the pager is in the basement where it is difficult to receive a signal or when it is located outside the service area. The detection of this word sync is performed at the decoder of the pager. In fact, if no bit streem of this particular pattern has been detected for two minutes, the icon having a predetermined shape blinks to 'out of range'. Ie 'unreceived'.

However, the method limited to the transmission of the status information related to the reception only considers the one-way radio call receiver. When the method is adopted in the two-way radio call receiver, transmission state information transmission is impossible. The two-way radio call receiver can not only receive data from the calling system but also send necessary data to the calling system. Thus, in the case of receiving as well as transmitting, it is of course necessary to inform the user whether or not the transmission is possible.

Accordingly, an object of the present invention is to provide a method for alerting a state in which transmission and reception are impossible in a two-way radio call receiver.

1 is a view showing the shape of the cracking code used in the wireless call receiver

2 is a diagram illustrating a data transmission form for a unidirectional radio call receiver;

3 is a block diagram of a two-way radio call receiver to which the present invention is applied

4 is a diagram illustrating a data transmission form for system synchronization of a two-way radio call receiver;

5 is a flowchart illustrating a process of controlling an indication of a state in which transmission and reception of a two-way radio page receiver is not possible according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. Also, in the following description, many specific details such as components of specific circuits are shown, which are provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific details. It is self-evident to those of ordinary knowledge in Esau. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a block diagram of a two-way radio call receiver to which the present invention is applied. The RF unit 11 receives radio call information and performs functions such as frequency conversion, demodulation, and waveform shaping. Therefore, the output of the RF unit 11 becomes radio call information converted into digital data. The output of the RF unit 11 is applied to the decoder 12. The decoder 12 decodes the received data and sets an operation mode of the radio call receiver. That is, in the idle mode, the supply of the operating power is controlled at regular intervals to detect the preamble data, and in the batch mode, the word sync data and the set frame data are detected. The detected frame data is decoded and converted into the original data form. The controller 13 receives the decoded data output from the decoder 12. The controller 13 processes the received data to control an alarm function. The alarm unit 17 generates an alarm signal such as a tone signal or a vibration signal for notifying that the alarm signal has been called by the alarm control signal output from the controller 13. The display unit 16 displays the message of the calling party and the status information of the radio page receiver by the display control signal output from the control unit 13. The memory 15 stores unique address information and frame information allocated to the radio page receiver.

FIG. 4 is a diagram illustrating a transmission form of data (hereinafter referred to as synchronization data) for system synchronization of a two-way radio call receiver. The synchronous data is transmitted from the system to the radio call receiver at three-minute intervals, for example, to synchronize the clock in the system with the clock inside the system. 23-bit first synchronization reference, 1-bit spare, 23-bit second synchronous reference, 1-bit TOD (time of day) most significant bit (MSB), 4-bit repetition count ( cycle number), the least significant bit (LSB) of the 4-bit TOD, and the 4-bit cyclic code (CRC). The first synchronization criterion is the past and the second synchronization criterion is time information corresponding to the past, so that the radio call receiver receives it and compares it with its own to calculate and correct the difference so that it is synchronized with the system. The cyclic code CRC is added to detect an error of data. This synchronization data is transmitted in a specific time unit in the message portion of the corresponding address in FIG. This is, of course, conveyed in the message part, which is different from the word motive of the firefox protocol. Since it is 60 bits in total, it requires the address and message code words of the next frame. The address and message code words are 32 bits each, but the valid bits are 20 bits each, so that one frame area is used. In this case, the pager whose further used frame is its own frame must wait until the frame of the next batch is received.

5 is a flowchart illustrating a process of controlling the display of the impossible transmission / reception status of the bidirectional wireless page receiver according to an embodiment of the present invention.

In step a, the controller 13 checks whether the preamble is detected in step b after power-on initialization. When the detection of the preamble is confirmed, in step c, the controller 13 checks whether word synchronization is detected. At this time, if the detection of the preamble is not confirmed, it is checked whether a predetermined time (for example, 2 minutes) has elapsed in step d. If the check result has elapsed, that is, if the detection is not confirmed within the limited time, the process proceeds to step e to cause the display unit 16 to display 'non-receipt'. The 'non-receipt' display is to allow an icon of a predetermined shape (eg, an antenna shape) indicating a reception possible state to blink or a separate icon to be displayed.

If the word synchronization is detected within a limited time, in step f, the controller 13 checks whether system synchronization data is detected. That is, it checks whether its own address exists in the frame of the group to which it belongs, and if there is its own address, it searches for message or system synchronization data in the message field. If the detection of the system synchronization data is not confirmed at this time, it is checked in step g whether the detection operation has been performed a predetermined number of times consecutively (for example, three times). If the check result is performed the predetermined number of times, i.e., if the detection is not confirmed within the limited number of repeated detections, the process proceeds to step h to cause the display unit 16 to display 'No transmission'. If the reception is possible and only the transmission is not checked, the icon blinking period is significantly different from that of 'No reception', that is, a predetermined multiple or more times, so that the user is distinguished from the state in which transmission and reception are not possible. To do it. If the detection of the system synchronization data is confirmed in step f, the process proceeds to step i to perform a known transmission operation.

In the present embodiment, the display unit visually displays the impossible transmission / reception state, but the alarm unit 17 of FIG. Of course.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention checks the impossible state of the two-way radio call receiver, and alerts the possible or impossible state visually, audibly, or by vibration. There is an advantage that the ease of use is easy to determine the impossible state.

Claims (4)

A method of displaying a state in which a transmission / reception is impossible in a bidirectional wireless call receiver having a display unit, the method comprising: a first process of checking whether a preamble is detected after power-on initialization; And if the detection is not confirmed within a limited time, the second step of causing the display unit to display 'non-receipt'; and if the detection of word synchronization within a limited time is confirmed, whether the system synchronization data is detected, And if the detection is not confirmed within the third step, causing the display unit to display 'not transmitable'. The method of claim 1, wherein the 'non-receipt' indication is characterized in that the icon of a predetermined shape indicating a reception possible state is blinking. The method of claim 2, wherein the blinking period of the icon is accelerated by a predetermined multiple to indicate a state in which reception is possible and transmission is not possible. In the two-way wireless call receiver having an alarm unit, a method of alarming a state in which transmission and reception is impossible is provided. The method includes: a first step of checking whether a preamble is detected after power-on initialization; A second step of causing the alarm unit to generate a predetermined alarm indicating 'no reception' if the detection is not confirmed within a limited time; and checking whether system synchronization data is detected if the detection of word synchronization within a limited time is confirmed. And if the detection is not confirmed within a limited time, causing the alarm unit to generate a predetermined alarm indicating 'no transmission'.