JPH0486042A - Communication system using digital radio network - Google Patents

Abstract

PURPOSE:To speedily collect much information by receiving information from second terminal equipments provided at plural respective slave stations through a digital radio network to plural first terminal equipments and processing the received information at first processing means. CONSTITUTION:A master station 1 and plural slave stations A1-Ai can be communicated through a digital radio network 2, and the master station 1 has plural first terminals equipments B-Bi to be connected with the digital radio network 2 by a radio or a cable, and the respective slave stations A1-Ai are equipped with second terminal equipments 9 connected to this digital radio network 2 by the radio. The information transmitted from the second terminal equipments 9 of the respective slave stations A1-Ai is received through the digital radio network 2 to the plural respective first terminal equipments B-Bi and collected by a first processing means 3 provided at the master station 1. Thus, much information from the plural respective slave stations A1-Ai can be totally collected at the master station 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a digital wireless network for transmitting and receiving information between a master station and a plurality of slave stations using a digital wireless network called a so-called teleterminal system. Related to communication methods using networks.

BACKGROUND OF THE INVENTION For example, there may be times when it is desired to quickly know the situation from multiple disaster or construction sites from a remote location, or when it is desired to quickly aggregate physical or chemical information measured at multiple detection locations. In the prior art, one central station or master station;
To communicate with multiple slave stations, during the time when a slave station is communicating with the master station, other slave stations must wait until this communication is completed before they can communicate with the master station. I can't.

Therefore, when the number of slave stations increases, there is a problem in that it takes a considerable amount of time for all slave stations to complete communication with the master station.

Therefore, when you want to collect information in a short period of time, you have to limit the number of slave stations that can communicate with one master station to a small number.In this way, it is difficult to collect information from a large number of slave stations. become unable.

Furthermore, in order to collect information quickly, it is sufficient to provide a plurality of combinations each consisting of one master station and a plurality of slave stations, but doing so would complicate the configuration.

Problems to be Solved by the Invention An object of the present invention is to provide a communication system using a digital wireless network that allows a large amount of information to be quickly collected with a simple configuration.

Means for Solving the Problems The present invention is provided with a master station, a digital wireless network, and a plurality of slave stations, and the master station has a plurality of first terminal devices connected to the digital wireless network wirelessly or by wire; a first processing means for collecting information respectively received by the first terminal device, and each slave station includes: a second terminal device wirelessly connected to a digital wireless network; and a second terminal device configured to transmit information by the second terminal device. This is a communication method using a digital wireless network, characterized in that it includes a second processing means for transmitting the data to the first terminal device.

Further, the present invention is provided with a master station, a digital wireless network, and a plurality of slave stations; a second terminal device wirelessly connected to the digital wireless network; and a first processing means for storing information received by the second terminal device from the first terminal device. This is a communication method using a digital wireless network characterized by including a second processing means.

Further, in the present invention, the first and second processing means monitor communication path information indicating whether one of the plurality of first terminal devices is communicating or not communicating, and the first and second terminal devices The device responds to this communication path information,
The present invention is characterized in that a vacant first terminal device is selected to communicate with a digital wireless network.

Effect According to the present invention, there is one master station, for example, and the master station and a plurality of slave stations can communicate via a digital wireless network, and the master station communicates with the digital wireless network wirelessly or by wire. It has a plurality of first terminal devices connected to it, and each slave station has a second terminal device wirelessly connected to this digital wireless network, so that the information transmitted from the second terminal device of each slave station is is received by each of the plurality of first terminal devices via a digital wireless network, and the information is collected by a first processing means provided in the master station. Therefore, it becomes possible for the master station to comprehensively collect a large amount of information from a plurality of slave stations.

Furthermore, according to the present invention, the information from the first processing means is transmitted from the plurality of first terminal devices to the digital wireless network, and the information from the digital wireless network is transmitted to the second terminal device of each of the plurality of slave stations. The second processing means provided in each slave station stores the received information.
It becomes possible to transmit information from one master station to many slave stations at once.

Furthermore, according to the present invention, the master station is provided with a plurality of terminal devices, and the first processing means is commonly connected to these first terminal devices. Compared to the configuration with multiple master stations described above,
In the present invention, the configuration is simplified.

Embodiment FIG. 1 is an overall block diagram of an embodiment of the present invention. A single master station 1 connects multiple slave stations AI, A2 . ..., it is possible to communicate with Ai wirelessly. The master station 1 includes a plurality of terminal devices B1. B2.・・・
, Bj (where i≧j), and is connected to the first processing means 3 realized by a microcomputer or the like. Reference sign AlA2. ..., Ai and Bl, B2.
..., Bj are generally subscripts 1, 2, . ...,t
, j may be omitted. In the first processing means 3,
It has a line control circuit 4 connected to each of the first terminal devices B, a processing circuit 5 connected to the line control circuit 4 to perform arithmetic processing, and a memory 6 connected to the processing circuit 5,
It has a function of performing planning operations such as collecting information from slave station A and sending information to slave station A. The processing circuit 5 is connected to an input means 7 such as a key manual means which is a master station communication device.
Information to be transmitted from the master station 1 to the slave station A is input, and the first terminal device B is operated to control it.

Each first terminal device B has an antenna 8 and can transmit and receive data to and from the digital wireless network 2, for example, by radio in the 800 MHz band.

The slave station A1 includes a second terminal device 9 wirelessly connected to the digital wireless network 2, and a second terminal device 9 connected to the second terminal device 9.
processing means 10. The second terminal device 9 has an antenna 1
1 and a digital wireless network 2, for example 800MHz
It is possible to send and receive data using the band. The second processing means 10 is
For example, realized by microcomputers,
The input means 14, which includes a processing port B12 that performs arithmetic processing operations and a memory 13 connected thereto, is connected to the processing circuit 12, and is provided with information to be transmitted to the master station 1, or is provided with information to be transmitted to the master station 1. Alternatively, a video signal captured at a construction site or the like may be provided, information such as detected physical or chemical detection results may be provided, or other types of information may be provided. The remaining slave stations A2° . . . , Ai are also configured in the same manner as the slave station A1 described above.

FIG. 2 is a diagram showing the structure of the signal S1 transmitted from the first terminal device B in FIG. 1 to the digital wireless network 2.

This signal S1 includes a start signal Sll representing the start of the signal S1, and a plurality of j first terminal devices Bl, B2 . ...
, Bj, a self-identification signal S1 for identifying one of Bj
2, a partner identification signal 31B that identifies all the second terminal devices 9 of the slave station A to which each first terminal device B wants to send information, and a partner identification signal 31B that identifies all the second terminal devices 9 of the slave station A to which each first terminal device B wants to send information, and Communicating first terminal device B information indicating the first terminal device fB that is currently communicating among the first terminal devices B that are a plurality of sessions that individually perform communication with the second terminal device 9 of slave station A through which the communication is performed. S14, an identification signal S15 identifying one of the second terminal devices 9 of the destination slave station A, transmission data S16 to be transmitted to the destination slave station A, and a fact that the line should be canceled. , a partner identification signal S18, line release first terminal device B information S19 representing the first terminal device B whose line has been released, and an end signal S20 representing the end of this signal S1. include.

The transmission data S16 is information to be transmitted that is input from the input means 7.

FIG. 3 is a diagram showing the structure of the signal S2 transmitted from the second terminal device 9 of the slave station A in FIG. 1 to the digital wireless network 2. This signal S2 includes a start signal S21 indicating the start of the signal S2, and a self-identification signal S22 for specifying and identifying the second terminal device 9 of each of the plurality of slave stations A.
One of the plurality of first terminal devices B provided in the master station 1 to which this second terminal device 9 wants to transmit information.
the other party identification signal S23 for identifying the one from the slave station A to the master station 1;
This transmission data S24, which includes transmission data S24, which is information to be transmitted and transmitted, and an end signal S25 indicating the end of this signal S2, is information given to the processing circuit 12 from the input means 14, and is information that is given to the processing circuit 12 from the input means 14. The information may be provided by an input operation such as the above, or it may be information automatically provided by detection or the like.

FIG. 4 shows packets Pi, P2.
. . , is a diagram showing P/. This communication is 800MH
The packets P1 to Pl shown in FIG. 4, which are performed for each of a plurality of frequencies in the Z band, represent a time-divided configuration of the entire packet of one of the frequencies. For example, the packet P1 is used for communication between the first terminal device B1 provided in the master station 1 and the second terminal device 9 provided in the slave station A1;
is used for communication between the first terminal device B2 and the second terminal device 9 of another slave station Ai. These packets P1-P
i, the signals Sl, S2 shown in FIGS.
The structure is as follows.

Furthermore, at a frequency preset for control, a communication is sent from the digital wireless network 2 to the master station 1 and the slave station A, indicating a line that is in communication and a line that is not communicating among the plurality of communication paths. route information is being sent. At this time, the signal S
14 is information representing the first terminal device B that is communicating, and signal S19 represents that the first terminal device B is not communicating.

FIG. 5 is a flowchart for explaining the operation of the first processing means 3 in the master station 1. From master station 1 to specific 1
When calling and communicating with one of the slave stations A1, the process moves from step a1 to step a2, and whether a signal requesting connection to one of the specific slave stations A1 to A1 is given from the input means 7. If so, the process moves to step a3, where a signal from the line control circuit 4 determines whether the vacant first terminal device B is selected from among the plurality of first terminal devices B.
It is determined whether there is

If there is no free first terminal device B, step a
4, waits for a predetermined time T, and then selects the first vacant
Check whether terminal device B exists.

In step a5, after the vacant first terminal device B is found, a connection is made to the vacant first terminal device B. In step a6, when the first terminal device of the master station 1, for example B1, is connected to the free line in step a5, communication path information indicating that the free first terminal device Bl is in communication and is used. is transmitted to the digital wireless network 2 as the signal S14 in FIG.
All Ai will be informed.

In step a7, the first terminal device B1 requests one of the slave stations A to make a call, and in the next step a8, it is determined whether a communication channel, which is a session, has been established. In step a9, after establishing the communication path, the signal S1 in FIG.
Data communication is performed by 6, and slave station A
Transmission data S24 is received by signal s2 in the figure.

After the data communication is completed in step alo, the communication path is released, and then in step a11, the signal S19 in FIG. , all slave stations Al, A
2. . . , Al are notified all at once, and thus the series of operations ends in step a12.

In step a6, the slave stations A are notified all at once of the first terminal devices B1 that are in communication, and the first terminal devices ffB1 that are in communication are used by the other input means 7 and the second terminal device 9. communication path collisions are avoided. In step a1.1, the second terminal devices 9 and second processing means 10 of all slave stations A are notified that the first terminal device BI has become vacant. The installation ffB1 can then be used.

FIG. 6 is a flowchart for explaining the operation for searching for the vacant first terminal device B in step a3 shown in FIG. Moving from step b1 to step b2, based on the signal from the line control circuit 4, it is determined whether the first terminal device B1, which is the communication path, is in communication,
If it is in communication, the process moves to the next step b3, where it is determined whether or not the first terminal device B2 is in communication, and in this way, each first terminal device B is sequentially searched, and step b4
When it is determined that the first terminal device Bj is in communication, all the first terminal devices B1 to Bj are in communication, and therefore the first terminal device is vacant. Since IFB does not exist, the process moves to step b6, waits for a predetermined time T1, and returns to step b2 again. When an empty first terminal device B is found in steps b2 to b4, a connection is made to the empty first terminal device B in step b5, and this step b5 corresponds to step a5 in FIG. 5.

FIG. 7 is a flow chart for explaining the operation of the second processing means 10 when the slave station A calls and communicates with the master station 1. Move to step c1 to step C2,
When there is a connection request from the input means 14 to transmit information to the master station 1, the process moves to the next step c3.

In step c3, a plurality of first
A search is made to see if there is an empty first terminal device B among the communication paths with one of the terminal devices B1 to Bj. If there is no vacant first terminal device B, the process moves to step c4, waits for a predetermined time T3, and searches again. When it is determined in this step c3 that there is a free first terminal device B, the process moves to step c5, and a call request is made to the free first terminal device B for communication with the base station 1.
In step c6, the slave station that made the call request and the master station 1
It is determined whether a communication channel, which is a session with the host, has been established. If the communication channel is not established, step c5
The call request is made again.

After the communication channel is established, in step c7, the information to be transmitted by the slave station A is read from the memory 13 where the information is stored, and the session of the master station 1 is established via the digital wireless network 2. The signal S2 from the slave station A at this time is transmitted to one of the first terminal devices B, and the signal S2 from the slave station A at this time
It has the configuration shown in the figure.

In step c8, after the transmission of information from the slave station A to the master station 1 is completed, the communication path is released, and thus the series of operations ends in step c9.

FIG. 8 is a flowchart showing the operation of step c3 in FIG. 7 in more detail. Moving from step d1 to step d2, a communication path for communication between the slave station A and one of the plurality of first terminal devices B provided in the master station 1;
That is, it is determined whether the first terminal device B1 of the master station is in communication, and if it is in communication, the process moves to step d3, and it is determined whether the first terminal device B2 of the next master station is in communication. will be judged. In this way, the first terminal device Bj of the master station
is also in communication, and therefore the first terminal devices B1 to Bj of all the master stations are in communication, step d6
Wait for a predetermined time T2 and then step d again.
Return to 2. When one of the first terminal devices B of the master station is not in communication and is an empty first terminal device B, the process moves to step d5, and the slave station A
This step d5, in which the call request is made while the call is in progress, corresponds to step c5 in FIG. In this way, slave station A
Information from 1 to A1 is collected in the master station 1 and stored in the memory 6.
Based on the information stored in the memory 6, calculation processing can be performed.

As another embodiment of the present invention, the information stored in the memory 6 (including the operating status of the first terminal device B) is transmitted to each of the plurality of first terminal devices B via the digital wireless network 2. Then, the information can be received by the second terminal devices f9 of a plurality of j stations A corresponding to each of the first terminal devices B1 to Bj, and stored in the memory 13.

The present invention can be used to manage the status of public energy supply networks such as electricity and gas, or to centrally manage equipment scattered over a wide area. can do.

Since the master station 1 is provided with a plurality of j first terminal devices B1 to Bj, as described in relation to the prior art described above, only one terminal device of the master station is provided. The sum total of all communication times between the master station 1 and the slave station A can be shortened to, for example, l/j, compared to a configuration in which there is no base station 1 and slave station A. Furthermore, in this embodiment, since the first processing means 3 is commonly used by the plurality of j first terminal devices B1 to Bj, it is also possible to simplify the configuration of the master station 1.

FIG. 9 is a block diagram of another embodiment of the invention. This embodiment is similar to the previous embodiment, and corresponding parts are given the same reference numerals.It should be noted that in this embodiment, the first terminal devices B1 to Bj provided in the master station 1 are: The digital wireless network 2 is individually connected to the digital wireless network 2 via the individual wired transmission path 16.
connected to.

This wired transmission line 16 may be realized by a dedicated line, public line network, packet network, or the like. The other configurations are similar to those of the previous embodiment.

Effects of the Invention According to the present invention, for example, only one master station is provided, and this master station can communicate with a plurality of slave stations via a digital wireless network. It has a plurality of first terminal devices connected to the network wirelessly or by wire,
Each of the plurality of slave stations has a second terminal device that is connected independently to the digital wireless network, and therefore, information from the second terminal device provided in each of the plurality of slave stations is transmitted via the digital wireless network. The information can be received by a plurality of first terminal devices, and the received information can be collected by the first processing means. Therefore, it is possible to simplify the configuration of the master station as much as possible and quickly collect a large amount of information. It becomes possible.

Further, according to the present invention, the information from the first processing means is transmitted all at once via each of the plurality of first terminal devices of the master station, and is received by the second terminal device provided in each slave station. Since the second processing means can store the received information, it becomes possible to quickly transmit information to a large number of slave stations at once.

According to the present invention, the first terminal device of the master station or the second terminal device of the slave station
Since the terminal device selects the first vacant terminal device out of multiple communication paths and communicates with the digital wireless network, there is no problem of communication path collision, and the master station and slave station can communicate smoothly. It can be carried out.

[Brief explanation of drawings]

FIG. 1 is an overall block diagram of an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of the signal S1 generated from the master station 1, and FIG.
4 shows the structure of the signal S2 generated from the slave station A, FIG. 4 shows the structure of the packets P1 to P1, and FIG. 5 explains the operation of the first processing means 3 of the master station 1. 6 is a flowchart for explaining the specific operation of step a3 in FIG. 5, FIG. 7 is a flowchart for explaining the operation of the second processing unit 810 of slave station A, and FIG. is a flowchart for explaining the specific operation of step c3 in FIG. 7, and FIG. 9 is a simplified block diagram showing the overall configuration of another embodiment of the present invention. 1... Master station, 2... Digital wireless network, 3... First
processing means, 4... line control circuit, 5... processing circuit,
6...Memory, 7...Input means, 8...Antenna,
9. Second terminal device, 10. Second processing means, 11.
...Antenna, 12...Processing circuit, 13...Memory,
14... Input means, 16... Wired transmission line, A to Ai.
...Slave stations, B to Bj...1st terminal device agent Patent attorney Kei Saikyo Figure 5 Figure 5

Claims (3)

[Claims] (1) A master station, a digital wireless network, and a plurality of slave stations are provided, and the master station is provided with a plurality of first terminal devices that are connected to the digital wireless network wirelessly or by wire, and each slave station includes a first processing means for collecting the received information;
A communication method using a digital wireless network, characterized in that the communication method includes a second processing means for providing information to a terminal device. (2) A master station, a digital wireless network, and a plurality of slave stations are provided, and the master station has a plurality of first terminal devices connected to the digital wireless network wirelessly or by wire, and information is transmitted to the first terminal device. and a first processing means for respectively transmitting data, and each slave station transmits the following information.
A digital wireless network characterized in that it includes a second terminal device wirelessly connected to the digital wireless network, and a second processing means for storing information received by the second terminal device from the first terminal device. A communication method that uses (3) The first and second processing means monitor communication path information indicating whether one of the plurality of first terminal devices is communicating or not, and the first and second terminal devices The communication using the digital wireless network according to claim 1 or 2, characterized in that in response to this communication path information, the first terminal device that is available is selected and communicates with the digital wireless network. method.