JP2839017B2 - Radio paging signal monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio paging system, and more particularly, to a radio paging signal monitor having a plurality of data speeds.

[0002]

2. Description of the Related Art A radio paging signal of a radio paging system often uses an NRZ coding system in signal transmission from a central station to a base station. In the NRZ encoding method, since clock information is not inserted in the encoding, if the same logical value continues, the same level continues.

[0003] Also, in the previous radio paging system, the data speed of the radio paging signal was one type, but in recent years, a plurality of types have been provided. That is, as shown in FIG. 4, the data speed changes in the middle of a continuous signal.

[0004]

Conventionally, by monitoring the transmission clock of the radio paging signal, the break of each bit is known to monitor the radio paging signal.
One of the data speeds was compatible. However, when there are a plurality of data speeds, as shown in FIG. 5, since there is no means for detecting the data speed of the monitored paging signal, the data speed cannot be determined. For this reason, it is difficult to confirm whether or not the radio paging signal having a plurality of data speeds as shown in FIG. 4 conforms to the format of the regulation, especially at the data speed.

In analyzing a paging signal having a plurality of data speeds, it is necessary to determine the data speed of each bit of the paging signal.

A technical object of the present invention is to monitor a radio paging signal having a plurality of data speeds by monitoring only the radio paging signal and confirming the radio paging signal including the data speed. It is to provide.

[0007]

According to the present invention, there is provided a radio paging signal monitoring apparatus for monitoring and analyzing a radio paging signal whose data speed changes in the middle of a continuous signal before inputting the signal to a radio transmitter. A change point detecting means for detecting a change point of the level of the monitored paging signal; and an interval between the change points by counting from the change point detected by the change point detection means to the change point using a high-speed reference clock. Change point interval measuring means for measuring the level of the paging signal being measured by the change point interval measuring means, and an output of the storage means for each change point detected by the change point detecting means. And bit information identifying means for reading the output of the change point interval measuring means and identifying the data speed, the number of bits and the logical value of the radio call signal from the value, and the bit information A serial transfer unit that assembles and transfers the data speed, the number of bits, and the logical value identified by the different unit into a serial transfer format, and receives a serial signal sent from the serial transfer unit, converts the serial signal into a predetermined format, and displays the converted signal. Means for monitoring a paging signal.

According to the present invention, there is also provided a radio paging signal monitoring apparatus for monitoring and analyzing a first signal, which is a radio paging signal whose data speed changes in the middle of a continuous signal, before inputting the first signal to a radio transmitter. A delay circuit that outputs a second signal obtained by delaying the first signal;
And an exclusive-OR circuit for taking an exclusive-OR of the second signal and the second signal, and outputting a third signal having a cycle of a change point of the first signal as a cycle, and delaying the third signal. A change point delay circuit that outputs a fourth signal that has been sampled, a first flip-flop circuit that samples the first signal with the fourth signal, and outputs a fifth signal holding the result, A fifth signal is sampled by the third signal, and a second flip-flop circuit for outputting a sixth signal holding the result is generated, and a high-speed reference clock for measuring an interval between transition points is generated. A clock generation circuit;
A transition point interval measurement circuit that counts the output signal of the clock generation circuit from the rise to the rise of the signal, and outputs the counter value as a seventh signal of a value obtained by measuring the interval between transition points; and the fourth signal Reading the values of the sixth signal and the seventh signal at the timing of the rising edge, determining the data speed and the number of bits of the first signal from the read value of the seventh signal,
A bit information discriminating circuit for discriminating a logical value from the value of the sixth signal, and a serial for assembling the data speed, the number of bits, and the logical value into a serial transfer format, and converting the data into an electrical level and a transfer speed capable of serial transfer A transfer circuit, receiving a signal assembled in a serial transfer format, obtaining a logical value, a bit number, and a data speed of the first signal, and obtaining the first signal according to a data speed mixed format of the first signal; And a paging signal analysis circuit for analyzing a signal and displaying the result.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a radio paging signal monitoring apparatus according to an embodiment of the present invention.

FIG. 1 is a block diagram showing a radio call signal monitoring device according to an embodiment of the present invention.

Referring to FIG. 1, a radio paging signal monitoring device 10 according to the present embodiment is a radio paging signal monitoring device 1.
0, a paging signal is monitored from the transmitter control station 50 of the paging system having the paging terminal 50, the transmitter 60, and the paging terminal 70.

The change point detecting means 11 detects a change point of the level of the radio call signal. The change point interval measuring means 13
The transition points are measured by counting the transition points from the transition points detected by the transition point detection means 11 using a high-speed reference clock. The storage unit 12 stores the level of the paging signal being measured by the change point interval measurement unit 13. The bit information identification means 14 is, for each change point detected by the change point detection means 11, the level of the radio call signal stored in the storage means 12 and the measurement result between the change points measured by the change point interval measurement means 13. Is read, and the “logical value”, “bit number”, and “data speed” of the radio call signal are determined. The serial transfer means 15 assembles the logical value, the number of bits, and the data speed into a serial transfer format, and converts them into an electrical level and a transfer speed at which serial transfer is possible. The paging signal analyzing means 16 is usually constituted by a personal computer, receives a signal assembled in a serial transfer format, knows the logical value, bit, and data speed of the paging signal.
The paging signal is analyzed in accordance with the mixed data speed format of the paging signal shown in (1) and the result is displayed on the monitor screen.

Next, the operation of the present apparatus will be described in detail.

The paging signal is monitored from the transmitter control station 50 of the paging system.

For each change point of the level of the paging signal detected by the change point detection means 11, the bit information identification means 14
Reads the interval between change points from the change point interval measuring means 13. The read value of the change point interval is a value that is an integral multiple of one of the data speed periods of the paging signal. From this, the data speed of the radio call signal is identified, and the number of bits is identified from a value that is an integral multiple of the data speed. At the same time, the bit information identification means 14 reads the level of the radio paging signal being measured stored in the storage means 12, and determines the logic of the radio paging signal.

The data speed, the number of bits, and the logic identified by the bit information identification means 14 are assembled into a serial transfer format by the serial transfer means 15 according to the example of FIG. Further, the signal is converted into an electrical level and speed capable of being serially transferred, and transferred to the radio call signal analyzing means 16. The radio paging signal analyzing means 16 is usually constituted by a personal computer, and analyzes the data speed, the number of bits, and the logical value of the radio paging signal according to the data speed mixed format of the radio paging signal shown in FIG. Are displayed on a monitor screen according to a predetermined format.

As described above, the present apparatus does not require a transmission clock signal, and can monitor a paging signal having a plurality of data speeds and confirm whether or not the signal conforms to a signal format.

[0018]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing a radio call signal monitoring device according to an embodiment of the present invention.

The paging signal monitoring device 2 according to the present embodiment.
0 is the paging signal monitoring device 20, the transmitter control station 8
0, a transmitter 90, and a paging signal from a transmitter control station of a paging system having a paging terminal 100.

The delay circuit 21 outputs a signal B obtained by delaying the radio call signal. The exclusive OR circuit 22 performs an exclusive OR operation on the paging signal and the signal B, and outputs a signal C having a cycle of a change point of the paging signal. The change point delay circuit 23 outputs a signal D obtained by delaying the signal C. The first flip-flop circuit 24 samples the radio call signal with a signal D and outputs a signal E holding the result.
The second flip-flop circuit 25 samples the signal E with the signal C and outputs a signal F holding the result.
The clock generation circuit 26 generates a high-speed reference clock for measuring the interval between transition points. The transition point interval measurement circuit 27 counts the output signal of the clock generation circuit 26 from the rise of the signal C to the rise, and outputs the count value as a signal G of a value obtained by measuring the transition point interval. The bit information identification circuit 28 reads the values of the signal F and the signal G at the rising timing of the signal D, and calculates the data speed and the number of bits of the paging signal from the read value of the signal G, and the logical value from the value of the signal F. Determine. The serial transfer circuit 29 assembles the data speed, the number of bits, and the logical value into a serial transfer format, and converts the data into an electrical level and a transfer speed capable of serial transfer. The radio paging signal analysis circuit 30 is usually constituted by a personal computer, receives a signal assembled in a serial transfer format, and knows the “logical value”, “bit number”, and “data speed” of the radio paging signal, The paging signal is analyzed according to the data speed mixed format of the paging signal shown in FIG. 4, and the result is displayed on a monitor screen.

FIG. 3A is an example of a time chart showing signals at various parts in FIG.
This is an example of a case where 00 bps data is monitored.

FIG. 3B shows an example of a serial transfer format. The paging signal A is monitored from the transmitting station control device of the paging system. The rising of the signal C, which is the exclusive OR of the signal A and the signal B obtained by delaying the signal A, is a change point of the radio call signal.

A signal E obtained by sampling the radio calling signal at the rising timing of the signal D obtained by delaying the signal C.
Is sampled again at the rising edge of the signal C.
Is a signal indicating the logic before the immediately preceding change point.

The number of times the clock from the clock generation circuit 26 is counted from the rising of the signal C to the rising of the next signal C is the signal G indicating the interval between the transition points.

The bit information identification circuit 28 reads the signal G and the signal F at the rise of the signal D. The bit number and data speed of the paging signal are determined from the value obtained by reading the signal G, and the logical value of the paging signal is determined from the value obtained by reading the signal F.

When the radio call signal has two types of data speeds, 1200 bps and 512 bps, and the value obtained by reading the signal G is, for example, "1666 .mu.S", a 1-bit pulse width of "833 .mu.S" at a data speed of 1200 bps. Therefore, it is determined that two bits of data at a data speed of 1200 bps continued for 2 bits, which is an integral multiple of "". Further, the bit information identification circuit 28
When the value of the signal F read at the same time is 0, it is determined that the radio paging signal is 1200 bps and 0 continues for 2 bits,
The information, “logical value”, “bit number”, and “data speed” are notified to the serial transfer circuit 29.

From the "logical value", "bit number", and "data speed" of the radio call signal, the serial transfer circuit 29 sets the "transfer data" signal into a serial transfer format according to the example of FIG. H is converted into an electrical level and data speed at which serial transfer is possible, and is transferred to the radio call signal analyzer 30.

The paging signal analyzer 30 is usually composed of a personal computer, and knows the "logical value", "bit number", and "data speed" of the paging signal from the "transfer data" H. The paging signal is analyzed in accordance with the data speed mixed format of the paging signal shown in FIG. Also, it is displayed on a monitor screen according to a predetermined format.

[0030]

A paging signal monitoring apparatus according to the present invention comprises a change point detecting means for detecting a change point of the level of a monitored paging signal, and a high speed signal from the change point detected by the change point detection means to the change point. A change point interval measuring means for measuring an interval between change points by counting using a reference clock; a storage means for storing the level of a radio call signal being measured by the change point interval measuring means; and a change point detecting means for detecting The output of the storage means and the output of the change point interval measurement means are read for each of the change points, and the bit information identification means for identifying the data speed, the number of bits, and the logical value of the radio call signal from the values are identified. Serial transfer means for assembling and transferring the data speed, the number of bits, and the logical value into a serial transfer format, and a serial signal transmitted from the serial transfer means. Means for receiving and converting the data into a predetermined format and displaying the data. Therefore, a transmission clock is not required, and only a radio paging signal having a plurality of data speeds is monitored. It is possible to confirm whether or not the signal format is followed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a paging signal monitoring device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a paging signal monitoring device according to an embodiment of the present invention.

FIGS. 3A and 3B are diagrams for explaining the operation of the device shown in FIG. 2, wherein FIG. 3A is a time chart showing signals in each section of the device, and FIG. 3B is a serial transfer format diagram.

FIG. 4 is a diagram showing an example of a data speed mixed format of a radio call signal monitored by the present invention and a conventional example.

FIG. 5 is a diagram showing an example of a time chart in a conventional radio paging signal monitor.

[Explanation of symbols]

 10, 20 Radio paging signal monitoring device 11 Change point detecting means 12 Storage means 13 Changing point interval measuring means 14 Bit information identification means 15 Serial transfer means 16 Radio paging signal analyzing means 21 Delay circuit 22 Exclusive OR circuit 23 Change point delay Circuit 24 First flip-flop circuit 25 Second flip-flop circuit 26 Clock generation circuit 27 Change point interval measurement circuit 28 Bit information identification circuit 29 Serial transfer circuit 30 Radio call signal analysis circuit 50, 80 Transmitter control station 60, 90 Transmitter 70, 100 Radio paging terminal

Claims (2)

(57) [Claims] 1. A radio paging signal monitoring device for monitoring and analyzing a radio paging signal whose data speed changes in the middle of a continuous signal before inputting the paging signal to a radio transmitter,
A change point detecting means for detecting a change point of the level of the monitored paging signal; and an interval from the change point detected by the change point detection means to the change point, which is counted by using a high-speed reference clock. A change point interval measuring means for measuring, a storage means for storing the level of the radio call signal being measured by the change point interval measuring means, and an output of the storage means for each change point detected by the change point detecting means. A bit information identification unit that reads the output of the change point interval measurement unit and identifies the data speed, the number of bits, and the logical value of the paging signal from the value, and the data speed, the number of bits, and the logic that the bit information identification unit identifies. Serial transfer means for assembling and transferring the value into a serial transfer format;
Means for receiving the serial signal sent from the serial transfer means, converting the serial signal into a predetermined format, and displaying the converted signal. 2. A radio paging signal monitoring apparatus for monitoring and analyzing a first signal, which is a radio paging signal whose data speed changes in the middle of a continuous signal, before inputting the first signal to a radio transmitter. A delay circuit that outputs a second signal obtained by delaying the first signal, an exclusive OR of the first signal and the second signal, and a change point of the first signal as a cycle An exclusive-OR circuit that outputs a third signal; a change point delay circuit that outputs a fourth signal obtained by delaying the third signal; and a first signal that is sampled by the fourth signal. A first flip-flop circuit for outputting a fifth signal holding the result, and a second flip-flop for sampling the fifth signal with the third signal and outputting a sixth signal holding the result The interval between the loop circuit and the transition point And a clock generation circuit for generating a high-speed reference clock for counting the output signal of the clock generation circuit from the rising of the third signal to the rising of the third signal, and changing the counter value to the seventh of the value obtained by measuring the interval between the change points. A change point interval measuring circuit that outputs a signal of the sixth signal and the value of the sixth signal and the seventh signal at the rising timing of the fourth signal, and reads the value of the seventh signal from the read value of the seventh signal. A bit information identification circuit for determining the data speed and the number of bits of the signal No. 1 and the logical value from the value of the sixth signal, and assembling the data speed, the number of bits and the logical value into a serial transfer format, Assembled into serial transfer format and serial transfer circuit to convert to transferable electrical level and transfer speed Receiving a signal, the logic value of the first signal, the number of bits, and to obtain a data speed analyzing said first signal in accordance with the data speed mixed format of said first signal,
A paging signal analysis circuit for displaying a result of the paging signal monitoring.