JPH0837517A - Communicating state grasping system for line - Google Patents

Abstract

PURPOSE:To always grasp a line state under communication without adding any optional information to transmitting data concerning the communicating state grasping system for a line between terminals. CONSTITUTION:The line for grasping the state is formed between the terminals, a transmitting part 1 of the terminal is provided with specified pattern generating parts 1a and 1b, and a receiving part 2 is provided with a specified pattern generating part 2c for generating the similar specified pattern to the transmitting part 1, timing control part 2b for controlling the timing of the specified pattern generating part 2c corresponding to a received signal, and specified pattern comparing part 2d. When the specified pattern is transmitted from the transmitting part 1 of one terminal to the line 3 for grasping the state and the signal of the specified pattern is received from the line 3 by the receiving part 2 of the other terminal, the received specified pattern is compared with the output of the specified pattern generating part 2c, of which the timing is controlled, by the specified pattern comparing part 2d and based on the compared result, the communicating state is decided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication status grasping system for a line between terminals. In terminal-to-terminal communication using digital signals via wire or wireless, data error may occur depending on the line condition, and communication reliability cannot be maintained. Therefore, a method of adding information for grasping the communication state is used, but it is desired to detect the communication state efficiently and surely to perform remote communication.

[0002]

2. Description of the Related Art FIG. 4 is an explanatory view of a conventional example. This Figure 4
Shows a method of adding additional information for detecting an error to transmission information as an example of the method of grasping the communication state adopted in the conventional digital communication. In the figure, 40 is a transmitting terminal, 41 is a wired or wireless line, and 42 is a receiving terminal.

In the transmitting terminal 40, the data 40a to be transmitted is also input to the arithmetic circuit 40b, and the arithmetic circuit 40b performs a division operation on the data using a predetermined generator polynomial, and the remainder (CRC) Redun
A dancy check) code is generated, and this CRC code 40c is added to the data 40a and transmitted to the line 41. Receiving terminal 4
2 performs a division operation on the reception data 42a from the line 41 by the arithmetic circuit 42b using the same generator polynomial as that on the transmission side, and if the remainder matches the CRC code 42c, it is determined that there is no error and the remainder is When it occurs, it is judged as an error.

The occurrence of a data error is detected by such a method, and if the error frequency is high due to noise or the like, it is determined that the condition of the communication line is bad if the communication device has no failure.

Conventionally, when it is understood that the state of the communication line is poor, the communication channel is changed at that time, or the communication speed is slowed down.

[0006]

As described above, conventionally, in order to always grasp the communication state, additional information generated by the arithmetic circuit from the transmission data is added to the transmission data and the arithmetic circuit is used on the receiving side. It is necessary to calculate
A device for grasping the communication state including a complicated and expensive arithmetic circuit is required for both receiving terminals, which causes a problem that the price of the terminal device becomes high. In addition, even when the communication state deteriorates, additional information is added for each data transmission unit (frame, etc.), so that it is not possible to detect the deterioration immediately and there is a problem that it is delayed in dealing with it. there were. Furthermore, there is a problem in that the data transmission efficiency is poor because the additional information is additionally transmitted in the transmitted / received data.

It is an object of the present invention to provide a communication state grasping method of a line between terminals which can always grasp the line state during communication without adding additional information to transmission data.

[0008]

FIG. 1 is a block diagram showing the principle of the present invention. In FIG. 1, 1 is a transmitter for grasping the circuit state, 1a is a specific pattern generator, 1b is a specific pattern output unit, 2 is a receiver for grasping the circuit state, 2a is A specific pattern receiving unit, 2b is a timing adjusting unit, 2c is a specific pattern generating unit having the same configuration as 1a of the transmitting unit 1, 2d is a specific pattern comparing unit, 2e is a comparison result notifying unit, and 3 is between two terminals. A line, which is a part of the band of a line that transmits actual data or a line that is close to it.

According to the present invention, a specific pattern is always output from the transmitting side during communication, and the specific pattern is processed on the receiving side to grasp the communication state, whereby the communication is smoothly performed.

[0010]

When communication is performed between the terminal having the transmitter 1 and the terminal having the receiver 2, when the transmitter 1 and the receiver 2 are connected via the line 3, a specific pattern of the transmitter is obtained. The generating unit 1a is provided with a mechanism for generating a preset specific regular pattern, for example, a PN (Pseudo Noise: virtual noise) pattern. The generated specific pattern is output from the specific pattern output unit 1b, transmitted via the line 3, and received by the specific pattern receiving unit 2a of the receiving unit 2.
The received signal is supplied to the timing adjustment unit 2b, where the timing signal is recognized from the reception and notified to the specific pattern generation unit 2c. The specific pattern generation unit 2c has a configuration for generating a pattern similar to that of the specific pattern generation unit 1a of the transmission unit 1, and generates a specific pattern including a predetermined signal sequence at the timing notified from the timing adjustment unit 2b.

The reception pattern output from the specific pattern receiving section 2a and the specific pattern generated by the specific pattern generating section 2c are compared in a specific pattern comparing section 2d, and the comparison result of matching or non-matching is compared result notifying section 2
The comparison result notifying unit 2e determines the received comparison result (communication state grasping result), and switches the actual data line (including wireless channel switching) and changes the communication speed according to the communication state. A communication control unit (not shown) that controls the above is notified.

[0012]

EXAMPLE FIG. 2 is a configuration diagram of Example 1, which is an example in which two terminals are connected by a wired line.

In FIG. 2, reference numeral 10 is a bidirectional line for performing normal communication between two terminals, and 11 is a line for grasping the communication state. In this example, two lines 11a and 11b corresponding to the signal direction are provided. It is represented by. 20 is one terminal (# 1),
Reference numeral 30 denotes another terminal (# 2), and the two terminals 20 and 30 communicate with each other via the wired normal communication line 10 and use the communication state grasping lines 11a and 11b to grasp the communication state. For communication. Reference numerals 21 and 31 are normal communication units for transmitting and receiving data through the line 10, and 22 and 32 are line 1
A communication state grasping section for grasping the communication state through 1a and 11b, 23 and 33 are keyboards for input, and 24 and 34 are displays for output.

The terminal 20 (hereinafter referred to as terminal # 1)
And the inside of the communication state grasping units 22 and 32 of the terminal 30 (hereinafter, referred to as the terminal # 2) have the same configuration.
2a and 32a are specific pattern generation units, 22b and 32b are specific pattern output units, 22c and 32c are specific pattern reception units, 22d and 32d are timing adjustment units, 22e and 3
Reference numeral 2e is a specific pattern generation unit, 22f and 32f are specific pattern comparison units, and 22g and 32g are comparison result notification units.

The line 11 for grasping the communication status is actually formed as one bidirectional line in many cases, but it may be a different line. Further, the line 11 may be a different line, which is connected in cooperation with the line 10 that performs normal communication, and may be a different channel or band in a multiple line.

To explain the operation, when the terminals # 1 and # 2 are connected by the lines 10 and 11, the normal communication unit 21 of the terminal # 1 and the normal communication unit 31 of the terminal # 2 are connected via the line 10. Data (including data obtained by digitizing voice)
Simultaneously with the start of transmission, the communication state grasping unit 22 of the terminal # 1 and the communication state grasping unit 32 of the terminal # 2 are activated. In the communication state grasping section 22 of the terminal # 1, the specific pattern generating section 22
The specific pattern is generated from a and the specific pattern output unit 22
It is transmitted from b to the line 11a. When the communication state grasping unit 32 of the terminal # 2 receives this signal by the specific pattern receiving unit 32c, the received specific pattern is compared with the specific pattern comparing unit 3
Supply to 2f.

The received signal is supplied to the timing adjusting section 32d to recognize the timing of the specific pattern. The timing of the recognized specific pattern is determined by the specific pattern generation unit 3
2e is notified. The specific pattern generation unit 32e generates a specific pattern at the notified timing, and the specific pattern comparison unit 32f compares the specific pattern with the received specific pattern. The comparison result by the specific pattern comparison unit 32f is supplied to the comparison result notification unit 32g, and the comparison result notification unit 32g.
From the normal communication unit 31.

The normal communication unit 21 can grasp the communication status based on the comparison result. If the matching rate of the comparison results is low (there are many mismatches), the communication status is judged to be bad, and if the matching rate is high, the communication is performed. The condition is judged to be good.

The above operation is an example of an operation of transmitting a specific pattern from the terminal # 1 to the terminal # 2 via the line 11a. Similarly, from the terminal # 2 to the terminal # 1 the line 11b.
At the same time, the operation of transmitting the specific pattern is performed through the communication state grasping unit 22 of the terminal # 1 for grasping the communication state in the opposite direction.

Further, the embodiment of FIG. 2 is an example in which the terminals perform one-to-one communication, but it can also be implemented in the case where the number of terminals is increased to one (one to plural, plural to plural). FIG. 3 is a configuration diagram of the second embodiment, which is an embodiment in which two mobile terminals communicate with each other via a wireless line.

In FIG. 3, reference numeral 40a denotes a line for transmitting data (including voice digital data) from the mobile terminal 50 to the mobile terminal 60 and transmission of data for grasping the communication state, and 40b for the mobile terminal 60 to the mobile terminal 50. A line for transmitting data to the mobile terminal # 1, 50a, 50b for transmitting the data for grasping the communication state and a receiving antenna attached to a different position of the mobile terminal # 1, 50
Reference numeral c is a transmitting antenna, 51 is a normal communication unit, 52 is a communication state grasping unit, 53 is a receiver A, 54 is a receiver B, 55 is a comparison result comparing unit, and 56 is a reception selecting unit. Further, 60 is a mobile terminal # 2, 60a, 60b is a receiving antenna attached to a different position of the mobile terminal # 2, 60c is a transmitting antenna, and 61 to 66 are the same as the respective parts of the above 51 to 56, and the description thereof is omitted. To do.

The operation of the second embodiment will be described. The mobile terminal 5
The normal communication unit 51 of 0 (hereinafter referred to as mobile terminal # 1) is a transmission unit (not shown) that transmits normal communication data from the transmission antenna 50c using a transmission line (channel using one frequency). And a reception unit (not shown) for selecting one of the reception signals of the reception antenna 50a or 50b and receiving the data of the normal communication from the partner mobile terminal # 2. That is, the normal communication unit 51 uses the two antennas 5
Two receiving signals 0a and 50b are input, a means (not shown) for selecting one of them is provided, and the receiving operation of the selected one is performed by demodulating and decoding. Be seen.

The mobile terminal 60 (hereinafter referred to as the mobile terminal # 2) also has the same configuration as that of the mobile terminal # 1, and the normal communication unit 61 uses the transmission antenna 60c to transmit the transmission line (transmission frequency of the mobile terminal # 1). Data for normal communication is transmitted using the same or different channel) and the reception antenna 50a or 5 is used.
0b, one of the received signals is selected, and the other mobile terminal # 1
The normal communication data is received, and the selecting means similar to the mobile terminal # 1 selects by the selective output from the communication state grasping section 62, and the receiving operation is performed.

The communication status grasping section 52 of the mobile terminal # 1 generates a specific pattern by the specific pattern generating section 52a during the communication by the normal communication section 51 and causes the specific pattern output section 52b to generate a wireless communication state grasping radio wave. Transmission is performed from the antenna 50c using a line (frequency adjacent to the line for normal communication or different time bands of the same frequency).

In the mobile terminal # 2 as well, the specific pattern generator 62b similarly generates and outputs the specific pattern output unit 62b.
Is transmitted from a wireless line for grasping the communication status. Since the mobile terminal # 1 and the mobile terminal # 2 have the same configuration and perform the same operation, the operation of the mobile terminal # 1 will be described on behalf of both.

The receivers 53 and 54 of the communication state grasping section 52 of the mobile terminal # 1 respectively receive the line signals for grasping the communication state among the signals received by the antennas 50a and 50b. The receiver 53 and the receiver 54 have the same configuration, and a specific pattern receiving unit 54 will be described with reference to an example of the receiver 53.
The received specific pattern is received at b, and the received specific pattern is input to the specific pattern comparison unit 53d.

The timing adjusting section 53b recognizes the timing from the received signal and notifies the specific pattern generating section 53c. As a result, the specific pattern generator 53c generates a specific pattern in synchronization with the received signal. The specific pattern comparing unit 53d compares the specific pattern from the specific pattern receiving unit 53a with the specific pattern from the specific pattern generating unit 53c, and supplies the comparison result to the comparison result notifying unit 53e. The comparison result from the comparison result notifying unit 53e is compared with the comparison result from the comparison result notifying unit 54e of the other receiver 54 in the comparison result comparing unit 55.

From this comparison, it is determined which receiver has the better communication condition. Comparison result The comparison result of the comparison unit 55 is supplied to the reception selection unit 56, and the reception selection unit 56 outputs the selection signal of the reception signal according to the judgment result.
Feed to 1. As a result, the normal communication unit 51 selects one of the two reception signals from the antennas 50a and 50b as the reception signal for normal communication, and performs the reception operation. This selection operation is continuously performed while the communication with the mobile terminal # 2 is being executed, and when the selection signal of the reception selection unit 56 changes due to the change of the communication state, the one with the better reception state is automatically selected accordingly. To choose.

The same operation as that of the mobile terminal # 1 described above is executed in the communication state grasping section 62 of the mobile terminal # 2, and the specific pattern transmitted from the mobile terminal # 1 is transmitted to the antenna 60.
One of the received signals a and 60b is selected by the normal communication unit 61.

In the case of the second embodiment, each mobile terminal # 1, #
2 have two receivers (53,
54 and 63, 64), but more receivers can be used. Further, in the second embodiment, whichever of the signals received by the two antennas is in a better state is selected. However, when both are in a bad state, the transmitting side is requested to switch to another channel (frequency). You can do it.

[0031]

According to the present invention, a complicated pattern such as an arithmetic circuit is required as in the prior art only by providing a pattern generating section in a transmitting section of a terminal and providing a simple circuit such as a pattern generating section and a comparing section in a receiving section. As compared with the case where a circuit is provided, the state of the line can be always grasped with a simple and inexpensive structure. This makes it possible to smoothly perform highly reliable communication.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a configuration diagram of a first embodiment.

FIG. 3 is a configuration diagram of a second embodiment.

FIG. 4 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmitter for circuit state grasp 1a Specific pattern generator 1b Specific pattern output unit 2 Receiver for circuit state grasp 2a Specific pattern receiver 2b Timing adjuster 2c Specific pattern generator 2d Specific pattern comparator 2e Comparison result notifier 3 lines

Claims (3)

[Claims] 1. In a communication state grasping method of a line between terminals, a state grasping line is formed between terminals, a transmission unit of the terminal is provided with a specific pattern generation unit, and a reception unit is provided with the same identification as the transmission unit. A specific pattern generation unit that generates a pattern, a timing adjustment unit that adjusts the timing of the specific pattern generation unit based on a received signal, and a specific pattern comparison unit, and a specific pattern from the transmission unit of one terminal to the line for status confirmation When the signal of the specific pattern is received from the line by the receiving unit of the other terminal, the received specific pattern and the output of the timing-adjusted specific pattern generation unit are compared by the specific pattern comparison unit, A method for ascertaining the communication status of a line, which determines the communication status based on the comparison result. 2. The communication system according to claim 1, wherein the line is wired, and each communication terminal is provided with a normal communication unit and a communication state grasping unit, and the communication state grasping unit is the transmitting unit according to claim 1. A communication state grasping method of a line, comprising a receiving unit, wherein each of the terminals grasps the communication state from the comparison result of the specific pattern comparing unit of the receiving unit, and performs control such as switching of the line for normal communication. . 3. A communication state grasping method for a line between two mobile terminals, wherein each mobile terminal comprises a normal communication unit and a communication state grasping unit, and a plurality of receiving antennas provided at different positions, wherein the communication is performed. The transmitting unit of the state grasping unit is provided with a specific pattern generating unit, transmits the specific pattern through a wireless line for grasping the communication state, and the receiving unit receives the specific pattern transmitted from the partner mobile terminal by each of the plurality of receiving antennas. And a plurality of receivers for simultaneously receiving signals of a wireless circuit including a specific pattern reception unit, and a specific pattern generation unit for generating a specific pattern of which timing is adjusted to the received specific pattern. When,
A specific pattern comparison unit for comparing the output of the specific pattern generation unit and the output of the specific pattern generation unit and outputting a comparison result indicating the communication state, and based on each comparison result indicating the communication state generated from the plurality of receivers. It is determined which of the receivers is in a good condition, and based on the result of the determination, the normal communication unit is instructed which reception signal of a plurality of antennas is to be selected. Communication status grasp method.