JP2002261684A - Wireless communication data monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless communication data monitor that allows analyzing wireless communication data of TDMA communication scheme for every layer. SOLUTION: The wireless communication data monitor can capture bit data and a bit clock from a base station 21 or a mobile station 22, sample the bit data based on the bit clock, and extract layer 1 data, and also can set a parameter for decoding layer 2 data for every slot.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication data monitor for analyzing radio communication data transmitted and received by using a TDMA digital communication system for each layer, and more particularly to a layer 2 which is divided into a plurality of slots and transmitted. The present invention relates to a wireless communication data monitor capable of easily analyzing data contents.

[0002]

2. Description of the Related Art In the development and maintenance of a base station and a mobile station of a digital mobile communication system, monitoring transmission / reception data in a radio section is one of important methods for confirming system operation. In a narrow-band digital mobile communication system, FDMA (Frequency Division Multicast) standardized by ARIB STD-T61 (Radio Industry Association).
As for the ple Access) communication method, a wireless communication data monitor that performs the above-described monitoring operation is known and used.

First, the configuration of a radio signal in the FDMA communication system will be described with reference to FIG. FIG.
FIG. 15A is a diagram showing a frame configuration and a radio signal format in the FDMA communication system. FIG. 15A shows the frame configuration, and FIG. 15B shows the format.

As shown in FIG. 15A, in the FDMA communication system, one frame length of a radio carrier is 40 ms, and 384 bits are transmitted in one frame. Also, 18 times the frame length is defined as a data length unit called a superframe. In the FDMA communication method, wireless signals are transmitted at a speed of 9.6 kbps according to such a frame configuration. In the FDMA communication system, one radio carrier, that is, one frame corresponds to one radio channel, and the radio channels are classified into control channels and communication channels. FIG. 15B shows a format of a downlink control channel.

In the FDMA communication system, radio signals are transmitted in layers 1, 2, and 3 (hereinafter, L1, L2, L3).
), Which correspond to the physical layer, the data link layer, and the network layer. In the FDMA communication system, data transmission of a radio signal is performed step by step and data decomposition of the radio signal is performed step by step using a function determined in each layer. In the wireless communication data monitor in the FDMA communication system, communication data is analyzed for each layer corresponding to such a signal structure.

A conventional wireless communication data monitor will be described with reference to FIG. FIG. 16 is a configuration block diagram of a conventional FDMA wireless communication data monitor. The conventional wireless communication data monitor 60 includes a synchronization word detection unit 61,
A clock generating means (clock in the figure) 62, a frame data extracting means 63, a data input / output means 64,
It comprises a decoding means 65 and a monitor display means 66.
The data input / output unit 64, the L2 decoding unit 65, the monitor display unit 66, and the L2 / L3 analysis tool are the same PC.
It works on the above.

A radio signal taken from a base station or a mobile station in an FDMA communication system is converted into digital bit data. In the wireless communication data monitor 60, the bit data is first input to the synchronization word detecting means 61. The synchronization word detecting means 61 detects a synchronization word included in the bit data.

The 9.6 kHz clock generated by the clock generator 62 is input to the synchronization word detector 61. The synchronization word detecting means 61 performs data sampling of the bit data based on the clock,
A synchronization word is detected from the obtained data bit string.

Next, the frame data extracting means 63 extracts frame data, that is, L1 data, based on the bit data and the synchronization word obtained by the synchronization word detecting means 61. Since the synchronization word is allocated for each frame, the frame data extraction unit 63 can extract the L1 data based on the synchronization word. The extracted L1 data is monitored and displayed on a frame basis by the monitor display means 66, and written out to a file by the data input / output means 64.

The extracted L1 data is output to the L2 decoding means 65, and the L1 data is output according to the radio signal format.
Decoded into two data. The decoded L2 data is monitored and displayed on a channel basis by the monitor display means 66 and written out to a file by the data input / output means 64. In the wireless communication data monitor of FIG. 16, the monitor display means 66 displays data on separate screens according to the type of data to be displayed.

The monitor display means 66 selects L2 / L3 after one of the L2 data displayed on the monitor is selected.
The analysis tool can be activated to transfer the selected L2 data. The L2 / L3 analysis tool uses a specific L2
The data is analyzed according to the standard, and the content of the message included in the L2 data, that is, the message detected at the stage of L3 is displayed.

The data input / output means 64 can input and output parameters for decoding L2 data, L1 data and L2 data in a file or manually. Further, the data input / output means 64 can input / output parameters, L1 data, or L2 data as individual files.

The start processing operation of the L2 / L3 analysis tool will be described with reference to FIG. FIG. 17 shows L2 / L3
FIG. 9 is a flowchart of an analysis tool activation process. Each flow diagram shows a user operation, monitor display means 66, L2
/ L3 is a processing operation of the analysis tool.

The user operates the monitor display means 66 to set L
Only one line of L2 data is selected from the L2 data monitor in which two data are displayed for each slot (step S2).
1), “L2 / L3” displayed on the L2 data monitor
The "analysis" button is pressed down (step S22).

When the operation in step S22 is performed, the monitor display means 66 causes the selected L2 data to be copied to the clipboard of the PC (step S24).
The L3 analysis tool is activated (Step S25). L2
When the / L3 analysis tool is activated, an application screen of the L2 / L3 analysis tool is displayed (step S2).
6).

The user confirms that the application screen of the L2 / L3 analysis tool is displayed, and pastes the contents of the L2 data copied to the clipboard into the L2 data input area of the application screen (step S23). Since the L2 data to be analyzed has been input, the L2 / L3 analysis tool can analyze the message contained in L2 (hereinafter referred to as L2 message).

[0017]

However, the conventional wireless communication data monitor has the following first to third problems. As a first problem, a wireless communication data monitor for analyzing and monitoring wireless communication data as described above is already used for the FDMA communication system.
TDMA (Time Division Multiple Access) standardized by RCR STD-39 (Radio Industry Association)
The communication method has not been provided yet.

As a second problem, the conventional wireless communication data monitor cannot easily cope with a change in the transmission speed of a wireless signal. As shown in FIG. 16, the conventional wireless communication data monitor performs data sampling based on a clock generated from a clock generation unit provided therein. That is, in analyzing a radio signal, it is necessary to know the transmission rate in advance and set the clock generation means so as to generate a clock having the same rate as the transmission rate. However, the transmission rate of a wireless signal often changes due to an environment setting or the like for operation confirmation, and a change in the setting of hardware as in the related art cannot easily cope with a change in the transmission rate.

As a third problem, it is inconvenient to analyze an L2 message divided into a plurality of frames and transmitted. In the FDMA communication system, an L2 message can be divided into a plurality of units and transmitted. When the L2 message is allocated to a frame, the head of the message is transmitted as signal configuration information.
The final flag and the number of remaining units in the message are added. In a conventional wireless communication data monitor, signal configuration information is determined at the time of L2 data decoding, and when it is considered that the same message is included in consecutive frames, these are combined and displayed as one L2 data list. I was

FIG. 18 is a diagram showing a data frame arrangement and a monitor display method in the FDMA communication system. In FIG. 18, it is assumed that A (2 units), B (3 units), C (1 unit), and D (1 unit) are divided and transmitted as an L2 message according to the frame arrangement in the upper part of FIG. In a conventional wireless communication data monitor, L2 decoding and determination of signal configuration information are performed by L2 decoding means, and L2 data transmitted in the frame arrangement in the upper part of FIG. 18 is displayed in a list on the monitor display means as shown in the lower part. Is done.

As described above, in the conventional wireless communication data monitor, the L2 data displayed on the monitor display means is changed to one.
One of them is selected to start the L2 / L3 analysis tool, and paste the selected L2 data copied to the clipboard to analyze the L2 message.

In the method of displaying L2 data shown in the lower part of FIG. 18, for a message divided into continuous frames such as L2 message A and transmitted, the corresponding L2 data is displayed in one line. , L2 data can be combined to easily analyze the L2 message.

However, when analyzing an L2 message divided into a plurality of discontinuous frames and transmitted as in the case of the L2 message B, the corresponding L2 data is displayed over a plurality of lines. Cannot analyze the L2 message B at once. For this reason, conventionally, a plurality of corresponding L2
A method of combining data and pasting it to an L2 / L3 analysis tool has been used, and analysis of L2 messages has been very inconvenient.

The present invention has been made in view of the above circumstances, and has as its object to provide a TDMA wireless communication data monitor capable of easily analyzing the contents of L2 data divided into a plurality of slots.

[0025]

SUMMARY OF THE INVENTION The present invention for solving the above-mentioned problems of the prior art is provided by inputting bit data and a bit clock fetched from a base station or a mobile station performing communication using a TDMA communication system. Layer 1 data is extracted from the bit data based on the bit clock, and when a specific monitor slot is selected for the extracted layer 1 data, the layer 2 data is extracted based on the parameters set for each slot. T for displaying the decoding result of the layer 2 data in the slot for each channel.
This is a DMA wireless communication data monitor, and can analyze a TDMA wireless signal for each layer in response to a change in the transmission speed of the TDMA wireless signal and a change in the transmission conditions in slot units.

Further, according to the present invention, in the above TDMA radio communication data monitor, the layer 1 data extracted from the bit data is displayed for each slot together with a slot number and a synchronization word, and a selected slot among the layer 1 data is displayed. , A layer 1 display screen for displaying guidance for executing decoding of layer 2 data for those belonging to the selected slot, and a decoded layer 2 corresponding to the selected slot.
A plurality of data are displayed, and layer 1 data before decoding is displayed for a selected one of the plurality of layer 2 data, and when the selected layer 2 data is singular, the selected layer 2 data is left as it is. In the case where there are a plurality of selected layer 2 data, a layer 2 display screen for displaying guidance for combining the selected layer 2 data and passing it to the layer 3 data analysis processing means;
And a parameter setting screen for setting data decoding parameters for each slot, so that the contents of the layer 2 data divided into a plurality of slots and transmitted can be easily analyzed.

Further, according to the present invention, in the above TDMA radio communication data monitor, when a continuous slot is selected on the layer 1 display screen, decoding of the layer 2 data is performed for the layer 1 data belonging to the selected slot. The two display screens display layer 2 data as one channel, and can easily analyze the contents of the layer 2 data of the TDMA radio signal divided into continuous slots and transmitted.

[0028]

Embodiments of the present invention will be described with reference to the drawings. Note that the function realizing means described below may be any circuit or device as long as the function can be realized, and some or all of the functions may be realized by software. is there. Further, the function realizing means may be realized by a plurality of circuits, or the plurality of function realizing means may be realized by a single circuit.

The wireless communication data monitor according to the embodiment of the present invention can set a parameter for decoding L2 data for each slot for wireless communication data of the TDMA communication system, and based on the set parameters, The data is decoded, so that data analysis for each layer can be performed in response to a change in the transmission condition in slot units.

In the wireless communication data monitor of the present invention, when extracting L1 data from wireless communication data,
A bit clock is input from the base station 21 or the mobile station 22, and sampling of bit data and extraction of L1 data are performed based on the bit clock, whereby L1 can be easily changed according to a change in the transmission speed of wireless communication data.
Data can be extracted.

In the wireless communication data monitor of the present invention, a continuous slot is selected on a main screen displaying the extracted L1 data, and L2 decoding is performed on the L1 data belonging to the selected slot to perform channel monitoring. On the screen, the selected slot is displayed as one channel and the corresponding L2 data is displayed.
Messages can be easily parsed.

In the wireless communication data monitor of the present invention, when a plurality of L2 data displayed on the channel monitor screen are selected and the layer 2 analysis button is depressed, the plurality of selected L2 data are combined to perform the L2 / L3 analysis. The L2 message transmitted to the tool is divided into a plurality of slots and can be easily analyzed.

The layer 1 display screen in the claims corresponds to the main screen in FIG. 7, the layer 2 display screen corresponds to a channel monitor screen, and the layer 3 data analysis means corresponds to an L2 / L3 analysis tool.

Prior to the description of the wireless communication data monitor of the present invention, the structure of a wireless signal in the TDMA communication system will be described first with reference to FIGS. FIG.
FIG. 5 is a diagram showing a correspondence table between a frame configuration and a synchronization word allocation in the DMA communication system, and FIG. 5 is a diagram showing a radio signal format and a process of forming the format in the TDMA communication system.

As shown in the upper part of FIG. 4, in the TDMA communication system, one frame length of a radio carrier is 40 ms.
Further, one frame is divided into four slots, and this is used as a minimum communication unit. One slot length is 10 ms.
320 bits are transmitted in the slot. Also, 18 times the frame length is defined as a data length unit called a superframe. In the TDMA communication system, wireless signals are transmitted at a speed of 32 kbps according to such a frame configuration.

In the TDMA communication system, one slot corresponds to one radio channel, and the radio channels are classified into a control channel and a communication channel. The allocation of a wireless channel in one frame may include a case where a control channel and a communication channel are mixed, a case where only a control channel or a communication channel is allocated, and a case where a communication channel is allocated to a plurality of slots. The case of allocating a plurality of slots to a communication channel is further divided into the case of allocating to a continuous slot and the case of allocating to a discontinuous slot.

Standard RCR ST for TDMA communication system
In D-39, provided service example (Second Volume P.578
Table 2.1-2) lists simultaneous voice / non-voice communication and high-speed non-voice simultaneous communication. As a means for realizing these, there is a method of allocating a plurality of slots to one communication channel.

According to such an allocation method, the communication channel normally performs 6.4 kbps voice communication or a maximum of 6.4 kbps non-voice communication. For example, the 0th and 1st slots are allocated to a certain communication channel. Allocate, perform 6.4 kbps voice communication using the 0th slot, perform non-voice communication at a maximum of 6.4 kbps using the first slot, or use the 0th and 1st slots to perform a maximum of 12. 8 kbps non-voice communication can be performed.

The lower part of FIG. 4 is a synchronization word assignment table in the TDMA communication system. In the table, ST #
0 to ST # 3 indicate slot numbers, S1 to S12, SS1
ＳＳSS4 indicates a synchronization word. Also, S1 / S5 in the column of the control channel / communication channel means that if the corresponding slot is the head of the superframe,
5 means S1 otherwise.

S1 to S12 are 20-bit SS
1 to SS4 are 32-bit data, each of which is a different unique bit pattern. The table shows the synchronization word pattern of the downlink signal. In the case of the uplink signal, a bit inversion of the corresponding synchronization word pattern of the downlink signal is used. As is clear from the table, in the TDMA communication system, the slot number used can be specified by referring to the synchronization word in the radio signal.

FIG. 5 shows a process of forming a radio signal format and a format in Layer 1 in the TDMA communication system. FIG. 5 is for the downlink control channel.

Also in the TDMA communication system, the radio signal has a hierarchical structure of layers 1 to 3, and the functions in each layer are the same as those in the FDMA communication system. In FIG. 5, when transmission data is generated, L2 data is divided into a plurality of units, and signal configuration information and a CRC code are added. The signal configuration information is always added irrespective of the number of divided units, and the header / last flag of the message, the number of remaining units in the message, and the like are added. The L2 data further undergoes an interleaving and scrambling process through a process of inserting and adding fixed bits and a convolutional coding, and thereafter, is bit-distributed according to a radio signal format, and is converted into a radio signal format as shown in the lowermost part of FIG. Be transformed.

As for the communication channel, as described in FIG. 4, the L2 data may be divided into a plurality of slots, and at this time, the L2 message is also divided into a plurality of slots.

At the time of decoding the received data, an operation reverse to the forming process shown in FIG. 5 is performed. That is, in the receiver,
After extracting the control channel from the received radio signal and performing descrambling, deinterleaving and Viterbi decoding, the CRC
A code is generated and compared with the CRC code added to the radio signal. By performing CRC code comparison, it is confirmed that there is no error in the transmitted L2 data, and the L2 data is decoded.

The configuration of the wireless communication data monitor according to the embodiment of the present invention will be described with reference to FIGS. Figure 1
FIG. 2 is a configuration block diagram of a wireless communication data monitor according to the embodiment of the present invention, and FIG. 2 is a hardware configuration diagram of the wireless communication data monitor and the device to be measured according to the embodiment of the present invention. Also, in FIG. 1, arrows indicate the flow of data.

As shown in FIG. 1, the wireless communication data monitor 10 according to the embodiment of the present invention
1, slot data extracting means 12, monitor display means 13, data input / output means 14, and channel dividing means 1.
5 and L2 decoding means 16. Although not shown in FIG. 1, the wireless communication data monitor 10 includes:
Control means for controlling activation of each means is provided.

The synchronous word detecting means 11 receives the bit data and the bit clock, and performs data sampling of the bit data based on the speed of the bit clock.
A synchronization word is detected from the obtained data bit string. Further, the synchronization word detection means 11 outputs the data bit string and the synchronization word to the slot data extraction means 12.

The slot data extraction means 12 receives the data bit string and the synchronization word from the synchronization word detection means 11, specifies the slot number based on the synchronization word,
Further, slot data, that is, L
Extract one data. The slot data extracting means 12
The extracted slot data, synchronization word and slot number are output to the data input / output means 14.

The monitor display means 13 outputs the L1 data output from the data input / output means 14 or the L2 decoding means 16,
The L2 data, synchronization word, slot number and channel number are displayed on the screen for each slot. Further, the monitor display means 13 displays a screen for activating each means constituting the wireless communication data monitor 10. Further, the monitor display means 13 converts a plurality of the displayed L2 data into L2 / L
3 Transfer to the analysis tool.

The data input / output means 14 writes the L1 data, L2 data, synchronization word, slot number and channel number output from the slot data extraction means 12, the channel division means 15 or the L2 decoding means 16 into a memory or a file. In addition, manually input parameters for L2 data decoding are written in a file. Further, the data input / output unit 14 reads the parameter for decoding the L2 data input as the file data or manually, and the L1 data or the L2 data input as the file data, and outputs to the channel dividing unit 15. The data input / output unit 14 can input and output parameters, L1 data, or L2 data as individual files.

The channel dividing unit 15 receives the L1 data and the synchronization word from the data input / output unit 14, detects the channel number of the L1 data based on the synchronization word pattern, divides the channel into channels, and divides the channel division result into channel numbers. Together with the L2 decoding means 16 and the data input / output means 1
4 is output. The channel dividing unit 15 performs channel division based on the parameters for decoding the L2 data output from the data input / output unit 14.

The L2 decoding means 16 includes the channel dividing means 1
The channel division result and the channel number are input from 5,
The L2 data is decoded for the channel division result according to the radio signal format, and the obtained L2 data and channel number are output to the monitor display means 13 or the data input / output means.

The wireless communication data monitor according to the embodiment of the present invention includes a DSP board 23 and a PC shown in FIG.
It is realized by a hardware configuration of 26. The synchronization word detecting means 11 and the slot data extracting means 12 in FIG.
On the P board 23, the monitor display unit 13, the data input / output unit 14, the channel dividing unit 15, the L2 decoding unit 16, the control unit, and the L2 / L3 analysis tool are realized on the PC 26.

In FIG. 2, the DSP board 23 has a T
Bit data obtained by digitally converting a radio signal received by the base station 21 or the mobile station 22 of the DMA communication system and a bit clock corresponding to the transmission speed are input. In the wireless communication data monitor of the present invention, the base station 21 or the mobile station 2
2, the bit data and the bit clock can be taken into the DSP board 23.

The DSP board 23 includes a DSP 24 and a ROM.
25. The execution program of the DSP 24 is stored in the ROM 25. At the time of startup, the execution program is booted from the ROM 25 to the DSP 24, and the execution program is resident in the DSP 24. Bit data and a bit clock are input from the base station 21 or the mobile station 22 to the DSP 24,
Data sampling of bit data and extraction of L1 data are performed based on these. Also, the DSP 24 has P
C26 and RS232C cable, L1
The data and the synchronization word are output to the PC 26 via the cable.

In the PC 26, a wireless data monitor application (hereinafter referred to as application), which is application software, is operating. The application instructs the DSP 24 to start monitoring bit data.
A stop command is transmitted to start or stop the extraction of the L1 data. On the contrary, the L1 data that has been synchronized is input from the DSP 24 to the PC 26 in slot units. PC26 and D
Communication with the SP 24 is performed via an RS232C cable.

The application performs decoding into L2 data, monitor display, and data input / output operations based on the L1 data output from the DSP 24. That is, the application realizes the monitor display unit 13, the data input / output unit 14, the channel division unit 15, the L2 decoding unit 16, the control unit, and the L2 / L3 analysis tool in FIG.

FIG. 6 is a configuration diagram of a structure for storing each layer data handled by the application. FIG.
(A), (b), and (c) are structures for storing L1 data output from the DSP 24, L1 data after channel division, and L2 data after L2 decoding, respectively. The application uses these structures to process data.

Next, the operation of the wireless communication data monitor of the present invention will be described with reference to FIGS. Before starting the monitoring of the wireless communication data, the user inputs parameters for decoding the L2 data to the application on the PC 26 and sets them, if necessary. The parameters may be input either by reading file data or by setting them via a screen displayed on the monitor display unit 13. The input parameter is the data input / output means 1
4 and written in a parameter initialization file containing the contents of the parameter initialization. Thereafter, the application performs L2 decoding based on the contents of the parameter initialization file.

Next, when the user issues a command to activate the synchronization word detecting means 11 and the slot data extracting means 12 from the screen displayed on the monitor display means 13, the application issues a monitor start command from the control means to the DSP.
It is transmitted to the DSP 24 of the board 23.

When the DSP 24 recognizes the monitor start command, it activates the resident execution program to activate the synchronization word detecting means 11 and the slot data extracting means 12, and the monitoring of the radio communication data is started.

When the monitoring is started, the synchronization word detecting means 11 starts taking in the bit data and the bit clock. A radio signal received by the base station 21 or the mobile station 22 in the TDMA communication system is converted into digital bit data and input to the DSP board 23. The bit clock is also input to the DSP board 23 at the same time.

In the above-described fetch operation, the user causes the monitor display means 13 to execute a monitor stop command, and in response to this, a monitor stop command is sent from the control means to the DSP 2.
4 until it is transmitted.

The bit data and bit clock are DSP
When input to 24, the synchronization word detection means 11 detects a synchronization word included in the bit data. The synchronization word detection means 11 performs data sampling of the bit data based on the input clock, and detects a synchronization word from the obtained data bit sequence. The data bit string and the synchronization word are output to the slot data extracting means 12.

The slot data extraction means 12 extracts slot data, that is, L1 data, based on the bit data and the synchronization word obtained by the synchronization word detection means 11. As described with reference to FIG. 4, since a specific pattern is assigned to the synchronization word for each slot, the slot data extraction means 12 specifies the slot number based on the synchronization word and extracts the L1 data from the bit data string. can do.

When the slot data extracting means 12 extracts the L1 data, the slot data extracting means 12 transmits the DS1 through the RS232C cable.
The L1 data is transmitted from the P24 to the PC 26 together with the synchronization word and the slot number for each slot.

The L1 data, synchronization word and slot number transmitted to the PC 26 are output to the data input / output means 14 in the application. Data input / output means 1
In step 4, these data are stored in a structure as shown in FIG. 6A and stored in a memory in the PC 26. The data of the structure shown in FIG. 6A stored in the memory is displayed on the monitor display unit 13 in units of slots after the extraction of the L1 data is completed.

When the user executes a command to write the L1 data file via the monitor display means 13,
The control means activates the data input / output means 14, and the data input / output means 14 refers to the data of the structure of FIG. 6A stored in the memory, and determines the L1 data, the synchronization word, and the slot number in slot units. Write to file.

After the extraction of the L1 data is completed, when the user executes a command for decoding the L2 data via the monitor display means 13, the control means activates the channel dividing means 15 and the L2 decoding means 16.

The channel dividing means 15 converts the data of the structure shown in FIG.
4, and divides the L1 data into channels based on the simultaneously input synchronization word pattern.

The channel dividing means 15 specifically detects a channel number from the L1 data and divides the L1 data on a channel basis based on the channel number. Further, the channel dividing means 15 is provided with the data input / output means 1 using the control means.
4 is started, the parameter initialization file is read, and channel division is performed based on parameters for L2 data decoding.

The channel dividing means 15 outputs the divided L1 data together with the channel number to the L2 decoding means 16 and the data input / output means 14. The divided L1 data output to the data input / output means 14 is stored together with the channel number in a structure as shown in FIG.
It is stored in the memory in C26.

When the divided L1 data and channel number are output to the L2 decoding means 15, they are decoded into L2 data according to the radio signal format. Decrypted L
The two data are output to the monitor display means 13 and the data input / output means 14 for each channel together with the channel number.

The divided L2 data output to the data input / output means 14 is shown in FIG.
And stored in a memory in the PC 26. Further, the user may select a specific slot and execute an L2 data decoding instruction on the L1 data of the selected slot.

When the user executes a command to write the L2 data file via the monitor display means 13,
The control means activates the data input / output means 14, and the data input / output means 14 writes the L2 data and the channel number into a file in channel units with reference to the data of the structure of FIG. 6C stored in the memory. .

The user can select a plurality of L2 data displayed on the monitor on the monitor display means 13. Further, the user can activate the L2 / L3 analysis tool to transfer the selected L2 data. L2 / L3
The analysis tool analyzes specific L2 data in accordance with the standard, and displays a message included in the L2 data, that is, a content of a message detected at the stage of L3.

L used in the wireless communication data monitor of the present invention
The startup processing operation of the 2 / L3 analysis tool will be described with reference to FIG. FIG. 3 is a flowchart of a startup process of the L2 / L3 analysis tool used in the wireless communication data monitor of the present invention. Each flowchart is, from the left, a user operation, a monitor display unit 13, and a processing operation of the L2 / L3 analysis tool.

The user operates the monitor display means 13
One line or a plurality of lines of L2 data is selected from the L2 data monitor in which two data are displayed for each slot (step S1).
1), “L2 / L3” displayed on the L2 data monitor
The "analysis" button is depressed (step S12).

When the operation in step S22 is performed, the monitor display means 13 obtains the number of lines of the L2 data selected by the user using the control means (step S1).
3) If there are a plurality of L2 data, they are linked (step S14), and the selected or linked L2 data is copied to the clipboard of the PC 26 (step S14).
15), activate the L2 / L3 analysis tool (step S16).

When the L2 / L3 analysis tool is activated, the contents of the L2 data copied to the clipboard are pasted into the L2 data input area of the application screen (step S17), and the L2 / L3 analysis tool application screen is displayed. Is performed (step S18). L2 / L3
Since the L2 data to be analyzed is displayed at the same time as the start of the analysis tool, the L2 / L3 analysis tool thereafter uses the L2 data.
The message can be analyzed.

In the wireless communication data monitor of the present invention, L1 data or L1 data input as file data is
L2 decoding and L2 message analysis can also be performed on the two data. File data is input / output means 1
4, the data is output to the channel dividing means 15, and thereafter, decoding into L2 data and analysis of the L2 message are performed by the operations described above.

An embodiment of a screen for data processing in the above-described wireless communication data monitor of the present invention will be described with reference to FIGS. The screen described below is displayed on the PC 26 by the monitor display unit 13 in FIG.

FIG. 7 shows a main screen of the wireless communication data monitor of the present invention.
It is a screen for displaying one data. When the application of the PC 26 is started, this screen is displayed first.
In FIG. 7, the monitor setting 31 is an item for selecting the type of the traveling direction of the L1 data to be displayed, and can select either the up or down.

The two-slot allocation 32 uses two consecutive slots as one channel to perform channel division and L
2 This item is set when decoding is performed. “Slot 0, 1”, “Slot 1, 2”
Three types of allocation methods of “slots 2 and 3” are prepared, and any one of them can be selected. The selected setting is displayed on the channel monitor screen described later.
The L2 data, which is reflected when displaying the data and corresponds to the selected continuous slot, is displayed as one channel.

As described with reference to FIG. 4, in the TDMA communication system, one communication channel may be divided into continuous slots and transmitted. Correspondingly, L2 data can be decoded.

The monitor display 33 is an item for setting a slot number to be displayed on the channel monitor screen. A plurality of slot numbers 0 to 3 can be selected and displayed.

The start button 34 is a button for starting acquisition of L1 data. When the start button 34 is depressed, the control means transmits a monitor start command to the DSP 24, captures bit data and a bit clock, and sets L1.
Start extracting data. As described above, the extracted L1 data is stored in the memory in the PC 26.

The stop button 35 is a button for ending acquisition of L1 data and starting L2 decoding. When the stop button 35 is depressed, the control means transmits a monitor stop command to the DSP 24, and terminates the capture of the bit data and the bit clock and the extraction of the L1 data.
Next, the data input / output means 14 outputs the L1 data stored in the memory to the monitor display means 13, and the monitor display means 13 displays the data on the L1 data monitor for each slot.

Further, when the display of the L1 data is completed, the monitor display means 36 displays the channel monitor screen according to the setting of the two-slot allocation 32 or the monitor display 33,
Further, the decoded L2 data is displayed on a channel monitor screen for each channel.

Since the L1 data is stored in the memory in the PC 26 and the channel division and the L2 decoding are performed based on the storage contents of the memory, the monitor display means 13 displays the L2 data in conjunction with the end of the L1 data extraction. can do.

The L1 data monitor 36 displays the L1 data output from the DSP 24 for each slot. The L1 data monitor 36 displays a slot number and a synchronization word in addition to the L1 data. In the L1 data monitor 36, a plurality of displayed L1 data can be selected by operating a keyboard or a mouse.

Further, a pull-down menu 37 is prepared on the main screen. In the pull-down menu 37, “File” indicates that all the extracted L1 data is to be saved in a file, “Edit” indicates that the selected L1 data is to be copied to the clipboard, and “Display” indicates that the selected slot has the L2 of the selected slot.
For the data display, “Setting” is for calling a parameter setting screen for L2 data decoding. FIG.
FIG. 4 is a diagram showing a format of an L1 data file stored on the main screen.

Among these, a list of each slot is displayed in the "display" menu, and when the user selects one from the list, the last extracted L1 data of the selected slot data is displayed on the channel monitor screen. . That is, on the main screen, two buttons, a stop button 35 and a “display” menu, are displayed as guidance for executing the decoding of the L2 data. In addition, between the time when the start button 34 is pressed and the time when the stop button 35 is pressed, that is, during the time when the L1 data is extracted, the parameter setting screen cannot be called from the “setting” menu.

FIG. 8 shows a parameter setting screen.
This is a screen on which parameters for data decoding can be manually set. On the parameter setting screen,
In order to support the communication method, parameters can be set for each slot. Further, the parameter screen is displayed at the time of start-up, in a state where parameters based on the contents of the parameter initialization file read by the data input / output means 14 are set. In FIG. 8, a channel type 41 is an item for setting the type of a channel on which L2 decoding is performed, and can select any one of control and communication channels.

The channel coding 42 is an item for setting whether or not each process is performed in the process of channel coding of a received radio signal, that is, in the process of forming a radio signal in layer 1.

In the TDMA communication system, a radio signal is normally formed through channel coding as shown in FIG. 5. However, a radio communication data monitor is formed by omitting intermediate processing for the radio signal monitor evaluation. Radio signals also need to be monitored. Therefore, by selecting processing to be considered at the time of L2 decoding in the channel coding 42, it is possible to accurately decode L2 data for radio signals formed under various conditions. FIG.
In the parameter setting screen of
, It is possible to set the presence or absence of FEC code (convolution code), CRC code, scrambling, and interleaving.

The control channel scrambling code 43 and the communication channel scrambling code 44 are items for setting the initial value of the scrambling pattern of the control channel or the communication channel for each downlink and uplink. In the TDMA communication standard, the initial value of the scramble pattern is 9
Since it is defined as bits, the control channel scramble code 43 and the communication channel scramble code 44 can each be set in the range of 000h to 1FFh.

The items of the channel type 41 to the communication channel scramble code 44 described above are prepared for each slot. Therefore, on the parameter setting screen in FIG. 8, the parameters for L2 data decoding can be changed and set for each slot.

The communication port 45 is a communication port of the PC 26 used for data communication with the DSP 24, that is, RS2.
This item is used to select and set the communication port to which the 32C cable is connected.

The layer 2 / layer 3 analysis tool 46 is an item for specifying the location of the file of the L2 / L3 analysis tool used in the wireless communication data monitor of the present invention. By specifying this item, the channel monitor screen is displayed. The L2 / L3 analysis tool called from is determined.

The setting button 47 is a button for validating the parameters set in each of the above-mentioned items. When the setting button 47 is depressed, the parameter setting screen is erased, and L2 data decoding is performed with the parameters set thereafter, and at the same time, ,
The data input / output means 14 rewrites the contents of the parameter initialization file to the set parameters,
Will be saved.

The cancel button 48 is a button for invalidating the parameters set for each item. When depressed, the parameters are not changed and the parameter setting screen is erased. The contents of the parameter initialization file are not updated.

[0103] In the pull-down menu 49, "File" is displayed.
This menu allows you to save the contents of the parameters set on the parameter setting screen to a file, read the parameters input as file data, and display the parameter settings of the read contents on the parameter setting screen. Can be. FIG. 12 is a diagram showing a format of a file to be accessed on the parameter setting screen. The parameter initialization file is also stored according to this format.

FIG. 9 shows a channel monitor screen which displays, for each channel, L2 data decoded based on the set parameters and belonging to the slot selected on the main screen. Note that the channel monitor screen of FIG. 9 corresponds to the L2 data monitor in the flowchart of FIG. The channel monitor screen can be displayed individually for each channel, and a maximum of four screens can be displayed.

In FIG. 9, the L2 data monitor 51
The decoded L2 data belonging to the slot selected on the main screen is displayed for each channel together with the CRC comparison result.

The L2 data monitor 51 of FIG. 9 shows the result when 0 is selected as the slot number to be displayed on the main screen of FIG. When certain L2 data is transmitted after being divided into slots of the same number in consecutive frames, the L2 data monitor 51 displays the L2 data of one channel in one line. In the L2 data monitor 51, the displayed L
A plurality of two data can be selected by keyboard or mouse operation.

The L1 data monitor 52 displays L1 data corresponding to the selected L2 data among the L2 data displayed on the L2 data monitor 51 for each slot. The L1 data monitor 52 displays a slot number and a synchronization word in addition to the L1 data. When analyzing the L2 message for the L2 data divided into a plurality of slots, the use of the L1 data monitor 51 makes it easy to check the correspondence between channels and slots.

The layer 2 analysis button 53 is a button for calling an L2 / L3 analysis tool for analyzing an L2 message with respect to the L2 data selected by the L2 data monitor 51.

When the layer 2 button 53 is depressed,
The selected L2 data is transferred to the L2 / L3 analysis tool, and the L2 / L3 analysis tool screen is displayed. At this time, when a plurality of L2 data are selected, these L2 data are combined and transferred to the L2 / L3 analysis tool. The process of transferring the L2 data is as described in the flowchart of FIG. Note that the layer 2 analysis button 5
Reference numeral 3 corresponds to an “L2 / L3 analysis” button in the flowchart of FIG. That is, on the channel monitor screen, L2 / L3
As guidance for transferring the L2 data to the analysis tool, a layer 2 analysis button 53 is displayed.

The pull-down menu 54 is provided with a “file”. With this menu, the contents of the L2 data displayed on the L2 data monitor 51 and the corresponding L1 data can be stored in a file, and the file is input as file data. The contents of L2 data and the corresponding L
One data can be read and the read content can be displayed on the channel monitor screen. FIG. 14 is a diagram showing a format of a file of L2 data and L1 data stored on the channel monitor screen.

FIG. 10 shows an L2 / L3 analysis tool screen for analyzing the L2 message selected for the L2 data on the channel monitor screen. W
The bit processing selection 71 is used for analyzing the L2 message,
This is an item for selecting whether or not the W bit, which is the signal configuration information included in the L2 data, is still added. Whether or not there is a W bit can be selected.

The signal selection 72 is an item for selecting the type of signal whose L2 message is to be analyzed, and any one of the six types can be selected. Receive data input 7
Reference numeral 3 denotes an item for inputting L2 data to be analyzed for the L2 message. By selecting L2 data on the channel monitor screen and depressing the layer 2 analysis button 53, the L2 / L3 analysis tool screen is activated with the selected L2 data displayed on the received data input 73. The start button 74 is a button for starting the analysis of the L2 message, and the end button 75 is a button for ending the analysis of the L2 message.

According to the screens shown in FIGS. 7 to 10, L1 in the wireless communication data monitor according to the embodiment of the present invention is displayed.
Data and L2 data can be displayed. FIG.
10 to FIG. 10 are as shown in FIG. FIG. 11 is a state transition diagram of each screen in the wireless communication data monitor of the present invention.

In the wireless communication data monitor according to the embodiment of the present invention, the above-described series of operations may be automatically performed in advance using a batch file or the like. Further, the type of guidance and the layout of items used for each screen of FIGS. 7 to 10 may be changed as necessary as long as the above-described operation can be performed. Further, the wireless communication data monitor of the present invention can cope with changes in the number of slots and the data length in one frame.

As described above, according to the wireless communication data monitor (main monitor) according to the embodiment of the present invention, the TDM
L1 data is extracted from the wireless communication data of the A communication method, and when a specific slot is selected for monitoring,
Since the L2 data is decoded based on the parameters corresponding to the slot and the decoding result of the L2 data in the slot is displayed for each channel, each layer corresponding to the change of the transmission condition in each slot is displayed. There is an effect that data analysis can be performed.

In the TDMA communication system, radio communication is performed using a slot as a minimum unit. In this monitor, in order to confirm the operation of the base station or the mobile station, the transmission conditions are changed by changing the radio communication data generation conditions for each slot. Since the L2 data decoding parameter can be set for each slot on the parameter setting screen, the wireless communication data monitor for confirming the operation of the base station 21 or the mobile station 22 can be easily performed. As a result, the efficiency of development and maintenance work of the base station and the mobile station of the TDMA communication system can be improved.

Further, in the present monitor, when L1 data is extracted from wireless communication data, the base station 21 or the mobile station 22
Inputting a bit clock from the device, and sampling bit data and extracting L1 data based on the bit clock, there is an effect that L1 data can be easily extracted according to a change in the transmission speed of wireless communication data. .

In this monitor, continuous slots are selected on the main screen for displaying the extracted L1 data,
By performing L2 decoding on L1 data belonging to the selected slot and displaying the selected slot as one channel on the channel monitor screen, the corresponding slot is divided into continuous slots. There is an effect that the transmitted L2 message can be easily analyzed.

In the TDMA communication system, wireless communication data of a communication channel may be transmitted by dividing L2 data into continuous slots in one frame. If it is known which slot is divided and transmitted, L2 data assigned to consecutive slots can be displayed as a group. Therefore, in the present monitor, by selecting a continuous slot on the main screen in advance and performing L2 decoding, it is possible to display L2 data corresponding to the selected slot as one channel on the channel monitor screen.

With the above specifications, this monitor is
The L2 / L3 analysis tool can easily input L2 data divided into continuous slots, and can easily analyze an L2 message. As a result, the operation time for analyzing the L2 message can be reduced and the operability can be improved.

Further, in this monitor, when a plurality of L2 data displayed on the channel monitor screen are selected and the layer 2 analysis button is pressed down, the plurality of selected L2 data are linked and transferred to the L2 / L3 analysis tool. By doing so, the L2 message divided into a plurality of slots and transmitted can be easily analyzed.

When the wireless communication data of the same channel is divided into a plurality of non-consecutive slots and transmitted, the monitor selects a plurality of L2 data, connects them, and analyzes the L2 message. L2
/ L3 analysis tool can easily input L2 data divided into a plurality of discontinuous slots without using an editor or the like, and can easily analyze an L2 message. As a result, the operation time for analyzing the L2 message can be reduced and the operability can be improved.

[0123]

According to the present invention, bit data and a bit clock fetched from a base station or a mobile station communicating using the TDMA communication system are input, and layer 1 data is converted from the bit data based on the bit clock. Extract,
When a specific monitoring slot is selected for the extracted layer 1 data, the decoding of the layer 2 data is performed based on the parameters set for each slot, and the decoding result of the layer 2 data in the slot is displayed for each channel. The TDMA wireless communication data monitor displayed in
There is an effect that the layer-by-layer analysis of the TDMA wireless signal can be performed in response to the change of the transmission speed of the TDMA wireless signal and the change of the transmission condition for each slot.

Further, according to the present invention, the layer 1 data extracted from the bit data is displayed for each slot together with the slot number and the synchronization word, and among the layer 1 data belonging to the selected slot, the layer 2 data is displayed.
A layer 1 display screen displaying guidance for executing data decoding, and a plurality of decoded layer 2 data corresponding to the selected slot are displayed, and a selected one of the plurality of layer 2 data is displayed. The layer 1 data before decoding is displayed, and when the selected layer 2 data is singular, the selected layer 2 data is left as it is,
When there are a plurality of selected layer 2 data, a layer 2 display screen for displaying guidance for combining the selected layer 2 data and passing it to the layer 3 data analysis processing means, and a parameter setting for layer 2 data decoding By having the parameter setting screen for each slot, there is an effect that the contents of the layer 2 data divided into a plurality of slots and transmitted can be easily analyzed.

Further, according to the present invention, when a continuous slot is selected on the layer 1 display screen, the decoding of the layer 2 data is performed for the layer 1 data belonging to the selected slot, and one layer is displayed on the layer 2 display screen. By displaying the layer 2 data as a channel, there is an effect that the contents of the layer 2 data of the TDMA radio signal divided into continuous slots and transmitted can be easily analyzed.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a wireless communication data monitor according to an embodiment of the present invention.

FIG. 2 is a hardware configuration diagram of a wireless communication data monitor and a device to be measured according to the embodiment of the present invention.

FIG. 3 shows L2 /
FIG. 11 is a flowchart of a startup process of the L3 analysis tool.

FIG. 4 is a diagram showing a frame configuration and a synchronization word allocation correspondence table in the TDMA communication system.

FIG. 5 is a diagram showing a radio signal format and a process of forming the format in the TDMA communication system.

FIG. 6 is a configuration diagram of a structure for storing each layer data handled by an application.

FIG. 7 is a main screen of the wireless communication data monitor of the present invention.

FIG. 8 is a parameter setting screen of the wireless communication data monitor of the present invention.

FIG. 9 is a channel monitor screen of the wireless communication data monitor of the present invention.

FIG. 10 shows L2 / L3 of the wireless communication data monitor of the present invention.
It is an analysis tool screen.

FIG. 11 is a state transition diagram of each screen in the wireless communication data monitor of the present invention.

FIG. 12 is a diagram showing a format of a file to be accessed on a parameter setting screen.

FIG. 13 is a diagram showing a format of a file of L1 data stored on the main screen.

FIG. 14 is a diagram showing a format of a file of L2 data and L1 data stored on a channel monitor screen.

FIG. 15 is a diagram showing a frame configuration and a radio signal format in the FDMA communication system.

FIG. 16 is a configuration block diagram of a conventional FDMA wireless communication data monitor.

FIG. 17 is a flowchart of a startup process of an L2 / L3 analysis tool used in a conventional FDMA wireless communication data monitor.

FIG. 18 is a diagram showing a data frame arrangement and a monitor display method in the FDMA communication system.

[Explanation of symbols]

11, 61: synchronization word detection means, 12: slot data extraction means, 13, 66: monitor display means, 14
... Data input / output means 15 Channel division means 1
6, 65 L2 decoding means, 21 base station, 22 mobile station, 23 DSP board, 24 DSP, 25
... ROM, 26 ... PC, 31 ... Monitor setting items,
32: 2-slot allocation item, 33: Monitor display item,
34, 74 ... start button, 35 ... stop button, 3
6, 52: Layer 1 data monitor, 37, 49, 54
... pull-down menu, 41 ... channel type item, 4
2 ... channel coding item, 43 ... control channel scramble code item, 44 ... communication channel scramble code item, 45 ... communication port item, 46 ... layer 2 / layer 3 analysis tool item, 47 ... setting button,
48: Cancel button, 51: Layer 2 data monitor, 53: Layer 2 analysis button, 62: Clock generation means, 63: Frame data extraction means, 64 ...
File input / output means, 71 ... W bit processing selection item,
72: signal selection item, 73: reception data input item,
75… End button

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Claims (3)

[Claims] 1. A bit data and a bit clock fetched from a base station or a mobile station performing communication using a TDMA communication method are input, and layer 1 data is extracted from the bit data based on the bit clock. When a specific monitoring slot is selected for the extracted layer 1 data, decoding of the layer 2 data is performed based on parameters set for each slot,
A TDMA wireless communication data monitor, wherein a decoding result of layer 2 data in the slot is displayed for each channel. 2. A layer 1 data extracted from the bit data is displayed for each slot together with a slot number and a synchronization word, and decoding of the layer 2 data is performed on the layer 1 data belonging to the selected slot. 1 display screen for displaying guidance for decoding, and decoded layer 2 corresponding to the selected slot
Displaying a plurality of data, displaying layer 1 data before decoding for a selected one of the plurality of layer 2 data, and displaying the selected layer 2 data when the selected layer 2 data is singular As it is, when there is a plurality of the selected layer 2 data, a layer 2 display screen for displaying the guidance for linking the selected layer 2 data and transferring the data to the layer 3 data analysis processing means; 2. The TDMA wireless communication data monitor according to claim 1, further comprising: a parameter setting screen for setting data decoding parameters for each slot. 3. When a continuous slot is selected on a layer 1 display screen, decoding of layer 2 data is performed on layer 1 data belonging to the selected slot, and layer 2 data is decoded as one channel on the layer 2 display screen. The TDMA wireless communication data monitor according to claim 2, wherein data is displayed.