JP2883578B2 - Data multiplex communication equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiplex communication apparatus, and more particularly to a data multiplexing apparatus and a data multiplexing method used for a base station in a portable telephone system, and a data multiplexing method for separating multiplexed data. The present invention relates to a separation device and a data separation method.

[0002]

2. Description of the Related Art Conventionally, a portable telephone system has been widely known. For example, a personal handy phone system has been used as a portable telephone system which can be used at home, outdoors, offices and the like using one portable telephone. (Hereinafter P
HS). In this PHS,
Although a base station is provided, as shown in FIG. 5, a large zone base station and a small zone base station may be provided. The small zone base station is provided in a manner dependent on the large zone base station. The small zone base station is provided due to radio wave conditions, transmission / reception frequencies, and the like in and around the area of the large zone base station. In other words, in order to avoid transmitting radio waves to areas where the base station radio wave of the large zone base station does not reach in densely populated areas, etc. A base station is provided.

Here, control signals are usually transmitted and received between the large zone base station and the small zone base station. That is, a control signal for controlling the operation of the small zone base station is transmitted from the large zone base station to the small zone base station, and a control signal for notifying the operation state of the small zone base station is transmitted to the small zone base station. Sent from station to large zone base station. For example, information such as the number of terminals existing in the area of each base station is exchanged. The large zone base station transmits a synchronization signal to the small zone base station. That is,
A synchronization signal is transmitted from the large zone base station to the small zone base station so that the large zone base station and the small zone base station transmit base station radio waves into the area of each base station at different timings.

An AMI code has been conventionally known as a code for data transmission. By generating a code pattern that violates the AMI code rule (bipolar rule), which is a code rule of the AMI code, a low-speed data code is generated. A method for multiplexing a synchronization signal is known.

[0005]

However, in order to transmit the control signal and the synchronization signal, as shown in FIG. 5, a transmission cable is provided between the large zone base station and the small zone base station for each signal. Provided, for example, bidirectionally transmit and receive control signals between the large zone base station and the small zone base station, and, when transmitting a synchronization signal from the large zone base station to the small zone base station, for the control signal Two signal lines and one signal line for a synchronization signal are required, and a total of three signal lines are required. In addition, there is a case where a control signal is bidirectionally transmitted and received between the large zone base station and the small zone base station, and a synchronization signal is bidirectionally transmitted and received between the large zone base station and the small zone base station. Requires two signal lines for control signals and two signal lines for synchronization signals, for a total of four signal lines.

[0006] Further, although the AMI code is excellent as a transmission code, it has no function of suppressing the continuation of zero codes, and therefore has a problem in application to a transmission system that performs self-timing extraction. A method is known in which a sequence of zero codes of a fixed length is replaced with a special pattern. That is,
Zero continuation is suppressed by a code pattern that violates the AMI coding rule. As this special pattern, BnZS
Codes and HDBn codes. Therefore, A
If a method of multiplexing a low-speed synchronization signal with a data code by generating a code pattern that violates the MI coding rule is used, it is not possible to suppress zero continuation by a code pattern that violates the AMI coding rule. Conversely, when suppression of zero continuation by a code pattern contrary to the AMI coding rule is performed, the AMI
The method of multiplexing low-speed synchronization signals due to intentionally violating the coding rule cannot be applied.

Therefore, the present invention can multiplex a low-speed synchronization signal by a method different from the AMI coding rule violation, and can reduce the number of signal lines between a large zone base station and a small zone base station. It is an object of the present invention to provide a multiplex communication device capable of performing such a communication.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made in consideration of transmission data and the transmission data.
Multiplexing low-speed data with slower transmission speed than transmission data
A data multiplex communication device for communicating by
Encoding unit for AMI encoding data, and the AMI code
Width of the AMI code data generated by the converting unit
Is changed according to High or Low of the low-speed data.
Pulse width conversion unit for converting to a pulse ratio, the pulse width conversion unit
To transmit pulse width converted code data in
A data multiplexing transmission device having
A receiving unit for receiving the transmitted coded data,
While detecting the pulse width of the received code data,
A before the low-speed data is multiplexed based on the code data
A pulse width detector for reproducing MI code data, the pulse width
Regenerate low-speed data from the pulse width detected by the detector
The low-speed data reproducing unit reproduces the data in the pulse width detecting unit.
Decoding the transmitted AMI code data to reproduce the transmission data
A data receiving device having an AMI decoding unit;
It is characterized by the following.

[0009] The transmission data and the transmission data more than the transmission data.
Data that is multiplexed with low-speed data with a low transmission speed for communication
A multiplex communication device, wherein a pulse width of the transmission data is
Deute according to High or Low of the low speed data
Pulse width conversion unit for converting the
AMI code for AMI coding the generated code data
Encoding unit, the encoded data encoded by the AMI encoding unit.
Multiplex transmission device having a transmission unit for transmitting data
Receiving the code data transmitted from the transmitting device.
Receiving unit, the pulse width of the code data received by the receiving unit
And an AMI code based on the code data.
A pulse width detector for reproducing data, and the pulse width detector
Low-speed data to reproduce low-speed data from the pulse width detected in
A reproduced by the data reproducing section and the pulse width detecting section.
AMI for decoding MI code data and reproducing transmission data
And a data receiving device having a decoding unit.
Features.

[0010]

[0011]

[0012]

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. A multiplex communication system according to a first embodiment of the present invention is configured as shown in FIG. 1, and includes a data multiplexing device A1 on the transmitting side and a data demultiplexing device B1 on the receiving side. Transmitter data multiplexing device A1
Is, as shown in FIG. 1, a NRZ data generator 10 and A
It has an MI encoding unit 12, a low-speed data generation unit 14, a pulse width conversion unit 16, and a transmission unit 18.

Here, the NRZ data generating unit 10
It generates NRZ data as transmission data for transmission. In the PHS base station, the control signal is the NRZ data. Further, the AMI encoding unit 12 is connected to the NRZ data generation unit 10,
It converts the NRZ data output from the RZ generator 10 into an AMI code. The low-speed data generator 14 generates low-speed data, for example, generates a low-speed synchronization signal. Here, the low-speed data is data having a lower transmission speed than the data generated by the NRZ data generator 10.

The pulse width converter 16 is connected to the AMI encoder 12 and the low-speed data generator 14,
For the AMI code output from the AMI encoding unit 12,
A predetermined conversion process is performed. That is, the low speed data is High.
And the Low period, the duty ratio of the pulse of the AMI code is converted. The transmitting unit 18 is connected to the pulse width converting unit 16 and transmits the code data output from the pulse width converting unit 16 to the data separator B1 on the receiving side.

Next, as shown in FIG. 1, the data separator B1 on the receiving side includes a receiving section 20 and a pulse width detecting section 22.
A low-speed data reproducing unit 24, an AMI decoding unit 26,
And an NRZ data receiving unit 28. Here, the receiving unit 20 receives code data from the data multiplexing device A1 on the transmission side, that is, code data in which low-speed data is multiplexed. Also, the pulse width detection unit 22
Detects the pulse width in the code data received by the receiving unit 20, and compares the detection result with the low-speed data reproducing unit 24.
And AMI code data before multiplexing the low-speed data. The low-speed data reproducing unit 24 reproduces low-speed data according to the detection result of the pulse width. Further, the AMI decoding unit 26 decodes the AMI code to generate NRZ data before the AMI coding, and
This is sent to the RZ data receiving unit 28.

The operation of the multiplex communication system having the above configuration will be described with reference to FIG. First, the operation of the data multiplexing device A1 will be described. That is, a data multiplexing method in the data multiplexing device A1 will be described. The NRZ data generator 10 generates NRZ data as shown by “NRZ” in FIG. And AMI
The encoding unit 12 performs AMI encoding on the NRZ data. That is, as shown in “AMI” of FIG.
When the Z data is "0", it is set to a zero level, and when the NRZ data is "1", it is code data for generating a pulse.
In addition, this pulse is configured such that the positive and negative are alternately inverted, and the pulse of the same polarity is not continuous. Here, the pulse width is such that the duty ratio is 50%. In addition, the low-speed data generator 14 generates code data as shown in “low-speed data” in FIG.

The pulse width conversion unit 16 changes the duty ratio of the code data generated by the AMI coding unit 12 according to the High period and the Low period of the low-speed data. That is, in the case of FIG. 2, the pulse width conversion unit 16 generates the code data indicated by “code of the embodiment of the present invention” in FIG. 2, and sets the duty ratio to 100% in the high-speed section of the low-speed data. , Low section, the duty ratio is 50%. Then, the transmitting unit 18
The above-described code data generated by the pulse width converter 16 is transmitted to the data separator B1 on the receiving side. As described above, the transmission code and the low-speed data are multiplexed.

Next, the operation of the data separation device B1 will be described. That is, a data separation method in the data separation device B1 will be described. The receiving unit 20 includes the transmitting unit 18
Receiving the code data sent from the
Send to 2. The pulse width detector 22 detects the pulse width of each pulse, sends the detection result to the low-speed data reproducing unit 24, and outputs the AM before the low-speed data is multiplexed.
Generate an I code. That is, a pulse having a duty ratio of 100% is converted to 50%, and an AMI code shown in “AMI” of FIG. 2 is generated. Also, the low-speed data reproducing unit 24
In, low-speed data is reproduced according to the detected pulse width. In this reproduction, the duty ratio is 100%
The pulse section is reproduced as a High section, and the pulse section having a duty ratio of 50% is reproduced as a Low section.
That is, a signal as shown in “Low-speed data after reception and reproduction” in FIG. 2 is reproduced. However, since the state up to that time is maintained until the pulse whose duty ratio changes rises, the data multiplexing device A1 side operates as shown in "low-speed data" and "low-speed data after reception and reproduction" in FIG. The low-speed data may be slightly different from the generated low-speed data.

The AMI decoder 26 decodes the AMI code data to generate NRZ data before AMI coding, and sends the NRZ data to the NRZ data receiver 28. That is,
It is assumed that all the pulse duty ratios are 100% and all pulses are in the positive direction. The NRZ code after reproduction is as shown in “NRZ code after reception and reproduction” in FIG. As described above, transmission data and low-speed data are separated. As described above, by generating a modified AMI code in which the duty ratio of the pulse width of the AMI code is changed, low-speed data can be multiplexed with transmission data.

Next, a multiplex communication system according to a second embodiment of the present invention will be described. The multiplex communication system of the second embodiment is configured as shown in FIG. 3 and includes a data multiplexing device A2 on the transmitting side and a data demultiplexing device B2 on the receiving side. As shown in FIG. 3, the data multiplexing device A2 on the transmission side includes an NRZ data generator 30, an RZ encoder 32,
A low-speed data generator 34, a pulse width converter 36, and an AMI
It has an encoding unit 38 and a transmission unit 40.

Here, the NRZ data generator 30
As in the first embodiment, NRZ data is generated as transmission data. Also, the RZ encoding unit 3
2 is connected to the NRZ data generator 30,
The NRZ data from the data generator 30 is converted into an RZ code. The low-speed data generator 34 generates low-speed data, for example, generates a low-speed synchronization signal.

The pulse width converter 36 is connected to the RZ encoder 32 and the low-speed data generator 34, and converts the RZ code output from the RZ encoder 32 into
According to the low-speed data from the low-speed data generator 34, a predetermined conversion process is performed. That is, similarly to the first embodiment, the duty ratio of the pulse of the RZ code is converted between a high-speed section and a low-speed section of low-speed data. Also, AMI
The encoder 38 converts the code data generated by the pulse width converter 36 into an AMI code. Further, the transmitting unit 40 transmits the AMI to the data separator B2 on the receiving side.
This is for transmitting the coded data output from the coding unit 38.

Next, as shown in FIG. 3, the data separating apparatus B2 on the receiving side includes a receiving section 42, a pulse width detecting section 44, and a low-speed data reproducing section 4 as in the first embodiment.
6, an AMI decoding unit 48, and an NRZ data receiving unit 50
And Here, the function of each unit of the data separation device B2 is the same as that of the first embodiment, and the reception unit 42 receives the code data from the data multiplexing device A2 on the transmission side. Further, the pulse width detection unit 44 detects the pulse width in the code data received by the data separation device B2, sends the detection result to the low-speed data reproduction unit 46, and outputs the AMI code data before multiplexing the low-speed data. Generate. The low-speed data reproducing unit 46 reproduces low-speed data. Further, the AMI decoding unit 48
The NRZ data before decoding the code and performing AMI coding is generated and sent to the NRZ data receiving unit 50.

The operation of the multiplex communication system having the above configuration will be described with reference to FIG. First, the operation of the data multiplexing device A2 will be described. That is, a data multiplexing method in the data multiplexing device A2 will be described. The NRZ data generator 30 generates NRZ data as shown by “NRZ” in FIG. Then, the RZ encoding unit 32 generates code data as indicated by “RZ” in FIG. That is, code data having a pulse width half that of the NRZ data is generated. Further, the low-speed data generator 34 generates code data as shown in “low-speed data” in FIG.

Then, the pulse width conversion unit 36 changes the duty ratio of the code data generated by the RZ coding unit 32 according to the High section and the Low section of the low-speed data. That is, the pulse width conversion unit 36 generates code data indicated by “RZ code after passing through the pulse width conversion unit” in FIG. 4, sets the duty ratio to 100% in low-speed data in a High section, and sets the low-speed data to Low. In the section, the duty ratio is set to 50%. Then, the AMI encoding unit 38
Performs AMI coding on the code data from the pulse width conversion unit 36. That is, as shown in "code of the embodiment of the present invention" in FIG. 4, the code data is code data in which the sign of the pulse of the code data is alternately inverted. Then, the transmitting unit 40
The above-described coded data generated by the I encoder 38 is transmitted to the data separator B2 on the receiving side. As described above,
Multiplexes transmission data and low-speed data.

Next, the operation of the data separation device B2 will be described. That is, a data separation method of the data separation device B2 will be described. The operation of the data separating device B2 is the same as that of the first embodiment, and the receiving unit 42
When the code data transmitted from 0 is received, the pulse width detection unit 44 detects the pulse width of each pulse, and the low-speed data reproduction unit 46 reproduces the low-speed data based on the detection result. Further, the pulse width detection unit 44 generates an AMI code before multiplexing the low-speed data, and outputs the AMI code to the AMI decoding unit 48.
Is the NRZ before decoding the AMI code and performing AMI coding.
The data is generated and sent to the NRZ data receiving unit 50.

As described above, by generating a modified AMI code in which the duty ratio of the pulse width of the AMI code is changed, low-speed data can be multiplexed with transmission data. In the first embodiment, the pulse width is changed in the AMI-encoded code data, whereas in the second embodiment, the code data in which the pulse width is changed in advance is AMI-encoded. Are different.

According to the first and second embodiments,
Since the low-speed data is multiplexed with the transmission data by changing the duty ratio of the pulse width of the AMI code, the low-speed data can be multiplexed without using a code pattern that violates the AMI coding rule, and the code that violates the AMI coding rule can be multiplexed. The pattern can be applied in other ways, for example, suppression of zero continuity. Further, since the transmission data and the low-speed data can be multiplexed in this manner, even in the PHS base station, the low-speed synchronization signal and the control signal can be multiplexed. Can be a book.
Therefore, when a control signal is bidirectionally transmitted and received between the large zone base station and the small zone base station, and a synchronization signal is transmitted from the large zone base station to the small zone base station, only two signal lines are required. In other words, the cable can be saved.

In the above description, the low-speed data Hi
Although the duty ratio is set to 100% in the gh section and the duty ratio is set to 50% in the Low section, the present invention is not limited to this, and the duty ratios may be different from each other.

[0031]

According to the data multiplexing method and data multiplexing apparatus of the present invention, low-speed data can be multiplexed without using a code pattern that violates the AMI coding rule.
A code pattern that violates the MI coding rule can be applied to suppression of zero continuation. Also, in the PHS base station,
The low-speed synchronization signal and the control signal can be multiplexed, the number of the signal lines for the low-speed synchronization signal and the control signal can be reduced to one, and the number of signal lines can be reduced. Further, according to the data separation method and the data separation device according to the present invention, it is possible to separate two data multiplexed by an AMI code having a duty ratio corresponding to High or Low of the low-speed data with the pulse width. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a multiplex communication system based on an embodiment of the present invention.

FIG. 2 is a time chart illustrating an operation of the multiplex communication system of FIG.

FIG. 3 is a block diagram illustrating a configuration of a multiplex communication system according to an embodiment of the present invention.

FIG. 4 is a time chart illustrating an operation of the multiplex communication system of FIG. 3;

FIG. 5 is an explanatory diagram showing a configuration of a large zone base station and a small zone base station in a PHS.

[Explanation of symbols]

 A1, A2 Data multiplexer B1, B2 Data separator 10, 30 NRZ data generator 12, 38 AMI encoder 14, 34 Low-speed data generator 16, 36 Pulse width converter 18, 40 Transmitter 20, 42 Reception Units 22, 44 Pulse width detection unit 24, 46 Low speed data reproduction unit 26, 48 AMI decoding unit 28, 50 NRZ data reception unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04J 7/00 H04L 5/02 H04L 25/49

Claims (2)

(57) [Claims] 1. A transmission data and a transmission speed higher than the transmission data.
Data multiplexing for multiplexing low-speed data with slow communication
A communications device, AMI code data and the transmission data AMI coding unit for AMI coding, produced in the AMI coding unit
To the high or low of the low-speed data.
A pulse width conversion unit for converting the duty ratio into a corresponding duty ratio,
The pulse width converter sends the pulse width-converted code data.
A data multiplexing transmission device having a transmission unit for receiving the code data transmitted from the transmission device.
Unit detects the pulse width of the code data received by the receiving unit
And the low-speed data is multiplexed based on the code data.
Width detection for reproducing AMI code data before being converted
Section, the low-speed data from the pulse width detected by the pulse width detection section.
A low-speed data reproducing unit for reproducing the AMI code data reproduced by the pulse width detecting unit
An AMI decoding unit for decoding data and reproducing transmission data.
A data multiplexing communication device comprising: 2. The transmission data and a transmission speed higher than the transmission data.
Data multiplexing for multiplexing low-speed data with slow communication
A communication device, wherein a pulse width of the transmission data is set to a Hig of the low speed data.
Pulse width converted to duty ratio according to h or Low
Conversion unit, the code data generated by the pulse width conversion unit
An AMI encoding unit that performs I encoding, and transmits coded data encoded by the AMI encoding unit;
A data multiplexing transmission device having a transmission unit for receiving the code data transmitted from the transmission device.
Unit detects the pulse width of the code data received by the receiving unit
And AMI code data based on the code data.
A low-speed data from the pulse width detected by the pulse width detection section
A low-speed data reproducing unit for reproducing the AMI code data reproduced by the pulse width detecting unit
An AMI decoding unit for decoding data and reproducing transmission data.
A data multiplexing communication device comprising: