JPH118707A - Data collecting system and communication equipment used in the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system where data can be collected with simple configuration and by means of efficient data communication by forming a radio channel in a direct communication mode between slave machines and transmitting data to a data collection device through the radio channel by bearer transmission. SOLUTION: The PHS data communication equipment 111 on a master side sequentially accesses the PHS data communication equipments 112-11N on a slave side and selectively transmits the request of data collection through the radio channel in the direct communication mode between the slave machines. The PHS data communication equipments 112-11N on the slave side transmit data generated by respective user units 212-21N through the radio channel by the polling system when the request of data collection is arrived from the PHS data communication equipment 111. Then, the PHS data communication equipment 111 collects respective pieces of data arrived from the PHS data communication equipments 112-11N to a data collection device 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data collection system for causing a data collection device to collect data generated from a plurality of data sources distributed in a physical area, and a communication device used in the system. About.

[0002]

2. Description of the Related Art In general, in a data collection system in which a data collection device collects respective data generated from a plurality of data sources distributed in a physical area, as shown in FIG. There is a system in which each data is transmitted to a data collection device and collected.

In FIG. 16, a plurality of user equipments 411 to 41N (N is a natural number) arranged as data sources
Is a data communication device 4 for transmitting data, respectively.
21 to 42N. These data communication devices 42
1-4N are connected to a public network 51 which is an external communication network via a telephone line. This public network 51
Is connected via a telephone line to a data communication device 62 having a data collection device 61 for storing data.

That is, a plurality of user devices 411 to 41
N generated by the data communication device 4
The data is accumulated in the data collection device 61 by the data communication device 62 via the public network 51 by 21 to 42N.

[0005] By the way, in the above data collection system,
The installation of the data communication devices 421 to 42N and 62 requires installation work to lay a telephone line, and the data communication between the data communication devices 421 to 42N can be performed via the public network 51. There is a problem that must be performed.

Therefore, conventionally, as shown in FIG.
Instead of the data communication devices 421 to 42N and 62, specific low-power wireless communication devices 431 to 43N and 63 are connected to the user devices 411 to 41N and the data collection device 61, respectively. Then, the user devices 411 to 41N
Is generated from the specific low-power wireless communication device 43.
The data is transmitted to the specific low-power wireless communication device 63 via a wireless channel by the channels 1 to 43N and stored in the data collection device 61. As a result, it is not necessary to lay a telephone line for data communication.
You do not need to go through 1.

However, the above-mentioned countermeasure is a press-talk system (hereinafter, referred to as a half-duplex system) in which transmission and reception are alternately switched, and the data communication speed is up to 4800 bps. There is a problem of bad.

[0008]

As described above, in the conventional data collection system, in order to perform data communication,
There is no need to lay a telephone line or a half-duplex system that alternately switches between transmission and reception via a wireless channel, so there is no need to lay a telephone line.
There is a problem that both of efficient data communication cannot be satisfied.

An object of the present invention is to provide a data collection system capable of collecting data by efficient data communication with a simple configuration without laying a telephone line, and a communication device used in the system. .

[0010]

A data collection system according to the present invention includes a plurality of first wireless communication devices having a direct communication mode between slave units installed corresponding to a plurality of data sources arranged in a distributed manner. And a second wireless communication device having a direct communication mode between slave units installed in correspondence with the data collection device, wherein the first and second wireless communication devices include a plurality of first wireless communication devices. Wireless connection means for connecting each other or between the first wireless communication device and the second wireless communication device via a wireless channel using a direct communication mode between slave units, and a plurality of data sources Data transmission means for transmitting the received data from the first wireless communication device to the second handset communication device via the wireless channel connected by the wireless connection means and accumulating the data in the data collection device. Features and That.

According to this configuration, the known first wireless communication device having the direct communication mode between slave units is installed at the data source, and the second known wireless communication device having the direct communication mode between slave units is installed in the data collection device. This is a simple configuration in which a wireless communication device is installed. These first and second wireless communication devices form a wireless channel in a direct communication mode between slave units between the first and second wireless communication devices. Are transmitted to the data collection device by bearer transmission.

As a result, when performing data communication, it is possible to eliminate the trouble of laying a telephone line and transmitting data via a public network, and furthermore, the simultaneous full-duplex transmission and reception in the direct communication mode between slave units. Up to 32 kb depending on the method
By transmitting data with the ps bearer transmission, high-speed and efficient data communication can be realized. In bearer transmission, high-speed and good data transmission quality can be maintained with respect to voice deemed communication, and error-free can be realized.

Further, the communication device according to the present invention includes a plurality of first wireless communication devices having a direct communication mode between child devices installed corresponding to a plurality of data generation sources geographically distributed; A second wireless communication device having a direct communication mode between child devices installed corresponding to the data collection device,
A communication device used as a second wireless communication device in a data collection system that transmits and collects data from a plurality of data sources from the first wireless communication device to the second wireless communication device.

And a wireless connection means for selectively connecting to the first wireless communication apparatus via a wireless channel using a direct communication mode between slave units, and a plurality of data sources, A data transmission unit for storing data arriving by bearer transmission via the wireless channel connected by the wireless connection unit in the data collection device.

According to this configuration, a wireless channel is formed with the first wireless communication device in the direct communication mode between the slave units, and the data generated from the data source is accumulated in the data collection device. Efficient data communication can be realized, and further cost reduction can be achieved.

Further, a communication device according to the present invention is intended for a communication device used as a first wireless communication device in the above-mentioned system, and is used for another first wireless communication device or a second wireless communication device. Wireless connection means for selectively connecting via a wireless channel using a direct communication mode between slave units, and wireless data connected by the wireless connection means by means of data generated by a plurality of data sources. And data transmission means for performing bearer transmission via a channel.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a system block diagram showing an embodiment of the present invention. FIG.
In the figure, reference numerals 111 to 11N denote distributed Ps.
HS (Personal Handy Phone System) data communication devices, which are connected to each other via a wireless channel using a direct communication mode between child devices. Also, reference numeral 21 in FIG.
Numerals 1 to 21N denote user equipment including a data generation source such as a vending machine, for example.
N is connected to the RS232C cable, and the communication function unit is RCRSTD2 via an external connection function unit in the PHS data communication devices 111 to 11N by a serial command.
Set to the direct communication mode between slave units specified in 8.

Further, the user equipments 211 to 21N communicate with the LAP-APs via the PHS data communication devices 111 to 11N, respectively.
P operation mode or Piafs (PHS internet access
forum standard) In the operation mode, data communication is performed in the direct communication mode between slave units. Here, the data communication speed in the LAP-P operation mode is 14.4 Kbps, and the data communication speed in the Piafs operation mode is almost 3 Kbps.
2 Kbps.

FIG. 2 shows the PHS data communication device 111.
The details are shown. Also, the PHS data communication device 11
2 to 11N also have the configuration shown in FIG. In FIG. 2, P
The HS data communication device 111 includes a radio unit 11a having an antenna 11a1, a modem unit 11b, and a TDMA (Time
Division Multiple Access) section 11c and error correction section 1
1d, an external interface 11e, and a control unit 11f.
And a memory 11g.

That is, the incoming radio frequency signal is received by the antenna 11a1, and then input to the receiving unit 11a3 via the high frequency switch 11a2 of the radio unit 11a.
In the receiving section 11a3, the received radio frequency signal is mixed with a reception local oscillation signal generated from the frequency synthesizer 11a4 and frequency-converted into a reception intermediate frequency signal. The local oscillation frequency generated from the frequency synthesizer 11a4 is specified by the control unit 11f according to the radio channel frequency. Also, the wireless unit 11a
Is provided with a reception field strength detection unit (RSSI) 11a5. The reception field strength detection section 11a5 detects the reception field strength of the radio frequency signal arriving at the antenna 11a1, and notifies the control section 11a5 of the detected value.

The received intermediate frequency signal output from the receiving section 11a3 is input to the demodulating section 11b1 of the modem section 11b. The demodulation section 11b1 performs digital demodulation of the received intermediate frequency signal, and thereby, RCRSTD 28 standardized for voice communication is extended to V
Unrestricted digital data (hereinafter, referred to as bearer data) conforming to version 2 is reproduced.

TDMA decoding section 1 of TDMA section 11c
1c1 extracts the bearer data from the time slot allocated to itself, and inputs the extracted bearer data to the error correction unit 11d according to the instruction of the control unit 11f. The error correction unit 11d supports both the LAP-P operation mode and the Piafs operation mode when performing bearer data communication, and detects an error in the LAP-P operation mode.
Error correction up to bits and an automatic retransmission request (hereinafter referred to as ARQ) for requesting retransmission of a frame in which an error has been detected are performed, and error detection and ARQ are performed in the Piafs operation mode.

The data corrected by the error correction section 11d is transmitted to the user equipment 2 via the external interface 11e.
1 is stored. The data generated by the user device 21 is supplied to the TDMA encoding unit 11c2 of the TDMA unit 11c via the external interface 11e and the error correction unit 11d.

Then, the TDMA encoder 11c2
Inserts the digital data to be transmitted into the time slot specified by the control unit 11f, and supplies it to the modulation unit 11b2 of the modem 11b. In the modulator 11b2, the carrier signal is digitally modulated by the digital data, and the modulated carrier signal is input to the transmitter 11a6. In the transmitting section 11a6, the modulated carrier signal is mixed with the transmitting local oscillation signal generated from the frequency synthesizer 11a4, thereby controlling the controlling section 11a6.
The frequency is converted to the radio channel frequency designated by f and further amplified to a predetermined transmission power level. Then, the radio frequency signal output from the transmitting section 11a6 is transmitted from the antenna 11a1 via the high frequency switch 11a2.

The control unit 11f includes, for example, a microcomputer as a main control unit, and is based on a control program or control data stored in a memory 11g.
Comprehensive control of each circuit is performed.

Next, the "polling method" and the "relay method" which are data collection methods in this system will be described. First, the "polling method" will be described. FIG. 3 shows a plurality of PHS data communication apparatuses 111 to 11.
9 shows a first arrangement example of N and user devices 212 to 21N.

In FIG. 3, reference numeral 31 denotes a data collection device for collecting data, to which a PHS data communication device 111 is connected. Here, the PHS data communication device 111 is set as a master that collects data from the PHS data communication devices 112 to 11N, and the other PHS data communication devices 112 to 11N that transmit data to the PHS data communication device 111 communicate with the master. Set to slave.

That is, the PHS data communication device 111 on the master side sequentially accesses the PHS data communication devices 112 to 11N, and selectively sends out a data collection request via a wireless channel in the direct communication mode between slave units. Then, the slave-side PHS data communication devices 112 to 11
N, when a request for data collection from the PHS data communication device 111 arrives, each of the user devices 212 to 21N
Is transmitted over a wireless channel by a polling method. After that, the PHS data communication device 111 causes the data collection device 31 to accumulate the respective data coming from the PHS data communication devices 112 to 11N.

FIG. 4 shows a time chart for performing communication by the polling method. In FIG. 4, TP is P
The HS data communication device 111 is the PHS data communication device 11
2W to 11N indicate the time for performing communication by the polling method, and TW indicates the waiting time until the PHS data communication apparatus 111 performs communication with the next polling method after accessing the PHS data communication apparatuses 112 to 11N. ing. Also, T2 to TN indicate respective times when the PHS data communication device 111 accesses each of the PHS data communication devices 112 to 11N and collects data. That is, the PHS data communication device 111
The data communication devices 112 to 11N are sequentially accessed to collect data.

FIG. 5 is a flowchart for explaining the operation of the master PHS data communication apparatus 111 in the polling method. This operation is performed by the control unit 11f in the PHS data communication device 111.

First, when started, the PHS data communication apparatus 111 determines in step S11 that its own initial value (i =
1) Setting is performed, and in step S12, the order of access to the slave is assigned. Here, first, P
The HS data communication device 112 is accessed. Then, the PHS data communication device 111 performs step S13.
To access the PHS data communication device 112,
A request for data collection is sent, and in step S14, the PHS
Receiving the data transmitted from the data communication device 112,
At step S15, the received data is
Transfer to 1 and store. Thereafter, the PHS data communication apparatus 111 performs the operations of steps S12 to S15 on P
The HS data communication devices 113 to 11N are repeatedly performed.

If the PHS data communication device 111 has collected data up to the PHS data communication device 11N in step S16 (YES), it enters an idle period (TW) mode (standby mode) in step S17, and in step S18. When the idle period ends (YES), the process returns to step S11.

FIG. 6 is a flowchart for explaining the operation of the PHS data communication devices 112 to 11N on the slave side in the polling method. This operation is
Control unit 11f in PHS data communication device 112-11N
It is done in. Here, the PHS data communication device 1
12 will be described as an example.

First, the PHS data communication device 112 enters the standby mode in step S19, and in step S20, the PHS data communication device 11
If there is an incoming call from No. 1 (YES), in step S21, P
By performing data communication with the HS data communication device 111, data generated from the user equipment 212 is transmitted to the PHS data communication device 111. Then, when the PHS data communication device 112 ends the data communication with the PHS data communication device 111 in step S22 (YES),
In step S19 again, the standby mode is entered.

Note that the PHS data communication device 112
If there is information to be stored in the memory on the user device 212 side when performing data communication with the HS data communication device 111, the information is omitted in the above flowchart, but in this case, the information is stored in the memory on the user device 212 side. ing.

Next, the relay system will be described. FIG.
Shows a second arrangement example of the plurality of PHS data communication devices 111 to 11N, the user devices 212 to 21N, and the data collection device 31.

In FIG. 7, the PHS data communication device 11
2 is connected to the PHS data communication device 113 which can communicate in the direct communication mode between slave units, and thereafter, relay connection is sequentially performed between the respective devices in the order of 3 to N in the direct communication mode between slave units. Then, the PHS data communication device 11N, in which the connection order by the relay connection is the last,
It is connected to the S data communication device 111 via a wireless channel.

Here, the data generated from the user equipment 212 sequentially passes through the PHS data communication devices 112 to 11N and is relayed by the PHS data communication device 111.
And stored in the data collection device 31. The data generated from each of the user devices 213 to 21N is added to the stored data in the process of being sequentially passed.

FIG. 8 shows a time chart for performing communication by the relay system. In FIG. 8, T indicates a data transmission period of the user devices 212 to 21N, and R indicates a data reception period of the user devices 213 to 21N.
That is, after transmitting the data to the user device 213, the user device 212 enters the standby period TW, and after the standby period TW ends, transmits the data to the user device 213 again. Then, the data generated from the user device 212 sequentially reaches the user devices 213 to 21N and finally reaches the data collection device 31. When collecting the accumulated data via the user devices 212 to 21N, the data collection device 31 enters a standby period mode.

FIG. 9 is a flowchart for explaining the operation of slave PHS data communication devices 112 to 11N in the relay system. Note that this operation is based on PH
Each control unit 11 in S data communication devices 112 to 11N
f.

First, when started, the PHS data communication apparatuses 112 to 11N determine in step S31 whether or not the slave is the first user equipment. Where P
Since the HS data communication device 112 has the user device 212 (YES), it makes a call to the next user device 213 in step S32, makes data communication with the user device 213 in step S33, and makes a call in step S34. ,
It transmits its own data to the user device 213.

Then, the PHS data communication device 112
In step S35, when the data communication is completed (YE
S), the idle period mode (standby mode) is entered in step S36, and when the idle period ends in step S37 (YES), the process returns to step S32 again.

On the other hand, in step S31, for example, in the case of the PHS data communication device 114 (NO), first,
In step S38, the standby mode is entered, and in step S39, if there is an incoming call from the first number (YES), in step S40, the PH having the first number user device 213 is set.
It performs data communication with the S data communication device 113. Then, in step S41, the data generated from the user devices 212 and 213 is stored in the memory of the user device 214 of itself, and in step S42, when the data communication with the previous number is completed (YES), in step S43, the next It is determined whether or not there is a number-th user device.

Here, when PHS data communication device 115 is present (YES), PHS data communication device 114
In step S44, a call is made to the PHS data communication device 115 having the next user equipment 215, and in step S45, data communication is performed. At this time, the PHS data communication device 114 determines in step S46 (first to first)
+ Transmits own data to PHS data communication apparatus 115, and terminates data communication in step S47 (YE
S), and again enters the standby mode of step S38.
Thereafter, the processing from step S38 is repeated for the next PHS data communication device.

If it is the last user equipment 21N in step S43 (NO), the PHS data communication apparatus 11N makes a call to the master-side PHS data communication apparatus 111 in step S48, and in step S49. , Data communication is performed, and in step S50, N
-The data of the two user devices and its own data are transmitted to the PHS data communication apparatus 111, and in step S51, if the data communication is completed (YES),
It enters the standby mode of 38.

FIG. 10 is a flowchart for explaining the operation of PHS data communication apparatus 111 on the master side in the relay system. This operation is performed by the control unit 11f in the PHS data communication device 111.

First, in step S52, the PHS data communication device 111 is in the standby mode. In step S53, there is an incoming call from the PHS data communication device 11N having the user device 21N whose connection order by the relay connection is the last. (YES), in step S54, this PH
Data communication is performed with the S data communication device 11N, and data of all the user devices 212 to 21N is stored in the data collection device 31 in step S55. Then, step S56
Then, when the data communication with the PHS data communication device 11N is completed (YES), the standby mode of step S52 is entered again.

FIGS. 11 and 12 show examples of the arrangement of masters and slaves in an area where the polling method and the relay method are mixed. In FIG. 11, a data collection device 31 sequentially accesses user devices 212 to 214 having a PHS data communication device on the slave side and is connected via a wireless channel using a direct communication mode between child devices. Then, the user devices 215 and 216 except the user devices 212 to 214 are sequentially relay-connected to each other, and are connected to the last user device 214.

That is, in the case of this system, data of the user devices 215 and 216 are collected by the user device 214 in a relay system in the order of the user device 215 → the user device 216 → the user device 214. Then, the data collection device 31 transmits the user devices 212 to 214 by a polling method.
User devices 212-216 to collect data from
Can collect all data.

In the arrangement example shown in FIG. 12, data of the user devices 215 and 216 are collected by the user device 213 in a polling system. The data collection device 31
User equipment 214 → user equipment 213 → user equipment 21
Since data is collected by the relay method in the order of 2, all data of the user devices 212 to 216 can be collected.

Therefore, according to the above-described embodiment, the known PHS data communication devices 112 to 11N having the direct communication mode between slave units are installed in the user devices 212 to 21N, and the direct communication between slave units is set to the data collection device 31. This is a simple configuration in which a known PHS data communication device 111 having a mode is installed.
N forms a wireless channel in the direct communication mode between the slave units, and transmits each data generated from the user equipments 212 to 21N to the data collection device 31 by bearer transmission via this wireless channel. ing.

As a result, when performing data communication, it is possible to solve the problem of laying a telephone line and performing the data transmission via the public network, and furthermore, the simultaneous full-duplex transmission and reception in the direct communication mode between the slave units. Up to 32 kb depending on the method
By transmitting data with the ps bearer transmission, high-speed and efficient data communication can be realized. In bearer transmission, high-speed and good data transmission quality can be maintained with respect to voice deemed communication, and error-free can be realized.

The PHS data communication device 111 on the master side collects data in a polling system with respect to the user devices 212 to 21N which can communicate with the own device in the direct communication mode between slave units, and collects data from the own device. For the user devices 212 to 21N that are out of the communication range of the direct communication mode between the slave units, data is collected by the relay method, thereby performing efficient data communication and data collection according to the arrangement status of the user devices 212 to 21N. It becomes possible.

FIGS. 13 to 15 show a second embodiment of the present invention. In this second embodiment,
Each control unit 11f of the PHS data communication devices 112 to 11N
The monitoring means for monitoring the state of the user equipment 212 to 21N corresponding to the own apparatus during the standby period for data transmission, and the master when the failure of the user equipment 212 to 21N is detected by the monitoring means. A wireless channel in the direct communication mode between slave units is set directly with a certain PHS data communication device 111 or via another slave, and the PHS data communication device 1 is set via this wireless channel.
And alarm information transmitting means for transmitting the alarm information to the alarm information transmission means 11.

FIG. 13 shows the PHS data communication devices 112 to 11N on the slave side operating in the polling system.
9 is a flowchart for explaining an operation when an emergency situation occurs. Here, the PHS data communication device 1
12 is shown as an example.

First, when the PHS data communication device 112 is in the standby mode in step S61,
When an alarm indicating an emergency of the user device 212 occurs in step S62 (YES), in step S63,
A call is sent to the PHS data communication device 111 on the master side, and in step S64, the PHS data communication device 111
The data communication is performed with the PHS data communication device 111 in step S65. And
In step S66, when the data communication is completed (YE
S), and returns to the standby mode of step S61 again.

If no alarm is generated in step S62 (NO), then in step S67,
When there is an incoming call from the PHS data communication device 111 (Y
ES), and the process proceeds to steps S68 and S69. Steps S68 and S69 are the same as steps S21 and S22 in FIG.

FIG. 14 is a flowchart for explaining the operation of the PHS data communication apparatus 112 operating in the relay mode when an emergency occurs. In FIG. 14, steps S71 to S74 and step S77 perform the same processes as steps S32 to S35 and step S37 in FIG.

That is, the PHS data communication device 112
Is in the idle period mode in step S75, if an alarm is generated in step S76 (YES), a call is made to the next PHS data communication device 113 in step S78, and in step S79 The data communication is performed, and the alarm information is transmitted to the PHS data communication device 113 in step S80. Then, when the data communication with the PHS data communication device 113 is completed in step S81 (YES), the flow returns to the idle period mode in step S75 again.

FIG. 15 shows a P which operates in a relay mode.
It is a flowchart for demonstrating operation | movement at the time of emergency of HS data communication apparatuses 113-11N.
Here, the PHS data communication device 113 will be described as an example.

That is, the PHS data communication device 113
Is in the idle period mode in step S91, if an alarm is generated in step S92 (YES), a call is made to the next PHS data communication device in step S93, and the data is transmitted in step S94. Communication is performed, and in step S95, alarm information is transmitted to the next PHS data communication device. Then, Step S96
When the data communication with the next PHS data communication device is completed (YES), the flow returns to the idle period mode of step S91 again.

In step 92, the PHS
If no alarm is generated (NO), the data communication apparatus 113 performs the processing of step S93 and subsequent steps. However, the processing of steps S93 to S105 is the same as step S3 of FIG.
Since the processing is the same as 9 to S51, the description is omitted.
In the above flowchart, when an emergency occurs in the PHS data communication device 11N whose relay order is the last, the PHS data communication device 111 is notified of the alarm information as it is.

Therefore, according to the second embodiment, when a failure occurs in each of the user equipments 212 to 21N, the PHS data communication apparatuses 112 to 11N immediately transmit to the master PHS data communication apparatus 111. Since the failure is notified as alarm information, the PHS data communication device 111 and the data collection device 31
It is possible to grasp the failure occurrence status of 12 to 21N, perform access processing to the PHS data communication devices 112 to 11N based on the failure occurrence status, and quickly recover from the failure to the user equipment in which the failure has occurred. It is also possible to take measures.

In the case of the relay system, since the data collection device 31 has a high probability of being idle, the user device 212 to 21N receives data from the data collection device 3 when an alarm occurs.
1 has a high success rate, and can be connected to the data collection device 31 without fail after several retransmissions. This probability is
It is shown by the following equation 1.

[0065]

(Equation 1)

In the case of the polling method, the data collection device 3
1 means that the probability of being idle is user equipment 212-21N
The number decreases as the number increases. As a countermeasure, not only increase the number of retransmissions to the data collection device 31 but also increase the polling interval TW, and the data collection device 31 and each of the user devices 212 to 21N share common time information,
It is conceivable that the user devices 212 to 21N transmit to the data collection device 31 during the standby period of the data collection device 31. In addition, the said probability is shown by following Formula 2.

[0067]

(Equation 2)

When collecting data from each of the user devices 212 to 21N, the data collection device 31 can perform efficient data communication if the polling cycle and the relay cycle can be varied according to the time of day. There are cases. The polling cycle and the relay cycle are represented by the following equations.

[0069]

(Equation 3)

Therefore, the PHS data communication devices 111 to 1
1N controls each control unit 11f to execute the data collection operation from the plurality of PHS data communication devices 112 to 11N on the slave side to the PHS data communication device 111 on the master side according to the time zone of the day. Variably set means.

For this reason, it is possible to perform efficient data collection corresponding to the state of data generation from each of the user devices 212 to 21N according to the time period of the day. Next, a description will be given of measures to be taken when a failure occurs in the user equipment 212 to 21N when performing data transmission by the relay method according to the third embodiment of the present invention.

Generally, when a radio channel is established in the direct communication mode between sub-units by RCRSTD, the sub-unit on the receiving side sets “P” indicating the sub-unit number of the receiving side in the destination identification code.
"S calling number (13 bits)" matches its own number, and "PS calling code (28 bits)" indicating the calling side handset number in the calling identification code sends the call to itself. It is necessary to confirm that it matches the slave unit number.

However, in the case of performing data transmission by the relay method, since the order is determined in advance, for example, the PHS data communication device 112 can be connected under the above-described conditions for the incoming call only when the adjacent downstream side is connected. Only the PHS data communication device 113 is provided. Therefore, when a failure occurs in the PHS data communication device 113, the PHS data communication device 112 cannot receive an incoming call to another PHS data communication device that can communicate in the direct communication mode between handset units.

Therefore, the PHS data communication device 112
In addition to the PHS data communication device 113, the slave device number of a user device (hereinafter referred to as a PHS user device) having a PHS data communication device in an arrangement capable of performing communication in the direct communication mode between slave devices is referred to as a “PS calling number (13 bit). ) "Is stored in the memory 11g of the own device or the user device 212. Further, the PHS user equipment which is arranged so as to be able to communicate with the PHS data communication device 112 in the direct communication mode between slave units includes the PHS data communication device 112 and the user equipment 212.
Is set to be recognized as "PS calling number (28 bits)". Then, the PHS data communication device 112 makes a call in order from the PHS data communication device 113 to the PHS user devices arranged to be able to communicate in the direct communication mode between slave units.

That is, the PHS data communication device 112
When a response cannot be made due to a failure in the PHS data communication device 113, a PHS user device in an arrangement capable of communicating in the direct communication mode between other slave units responds, changes the route of the relay, and transmits the data. It becomes possible to transmit.
At this time, when information indicating that data communication is not possible with the user device 213 having the PHS data communication device 113 is transmitted as information to the PHS user device of the route change partner,
At the end of the relay, the data collection device 31 on the master side
It recognizes that the HS data communication device 113 has failed.

Therefore, according to the third embodiment, when data is collected by the relay method, if a failure occurs in the PHS user equipment in the middle of relaying, the PHS user equipment of the preceding number is transferred to the transmission route. Is changed to transmit data to the data collection device 31 on the master side, so that, for example, it is not necessary to wait until recovery from a failure, and the failure can be dealt with promptly.

Also, in each of the above embodiments, a known PHS is used for the user devices 212 to 21N and the data collection device 31.
By simply connecting the data communication devices 111 to 11N, efficient data communication can be realized in the direct communication mode between slave units, so that the cost can be reduced.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0079]

As described in detail above, according to the present invention,
It is possible to provide a data collection system capable of collecting data by a simple configuration and efficient data communication without laying a telephone line, and a communication device used in the system.

[Brief description of the drawings]

FIG. 1 is a system block diagram showing an embodiment of a data collection system according to the present invention.

FIG. 2 is a block diagram showing a detailed configuration of the PHS data communication device according to the embodiment;

FIG. 3 is a system block configuration diagram for explaining an example of the arrangement of a user device and a data collection device that perform data communication by a polling method according to the embodiment;

FIG. 4 is a time chart shown to explain an operation by a polling method in the embodiment.

FIG. 5 is a flowchart shown to explain the operation of the data collection device by the polling method in the embodiment.

FIG. 6 is a flowchart shown to explain an operation on the user device side by the polling method in the embodiment.

FIG. 7 is a system block configuration diagram for explaining an example of the arrangement of a user device and a data collection device that perform data communication by a relay method according to the embodiment;

FIG. 8 is a time chart shown to explain an operation by the relay system in the embodiment.

FIG. 9 is an exemplary flowchart illustrating the operation of the relay device according to the embodiment on the user device side;

FIG. 10 is a flowchart shown to explain the operation of the data collection device using the relay method in the embodiment.

FIG. 11 is a diagram showing a first arrangement example of user equipment and a data collection device when the polling method and the relay method in the embodiment are mixed.

FIG. 12 is a diagram showing a second arrangement example of the user devices and the data collection device when the polling method and the relay method in the embodiment are mixed.

FIG. 13 is a flowchart illustrating an operation on the user device side during polling communication according to the second embodiment of the present invention.

FIG. 14 is a flowchart for explaining the operation of the most upstream user device at the time of relay communication in the second embodiment;

FIG. 15 is a flowchart shown to explain an operation on the user device side during relay system communication according to the second embodiment.

FIG. 16 is a system block diagram showing a conventional data collection system.

FIG. 17 is a system block diagram showing another conventional data collection system.

[Explanation of symbols]

 111 to 11N: PHS data communication device; 211 to 21N, 411 to 41N: User equipment; 31, 61: Data collection device; 421 to 42N, 62: Data communication device; , 51 ... public network.

Claims (9)

[Claims] 1. A plurality of first wireless communication devices having a direct communication mode between slave units installed corresponding to a plurality of data sources arranged in a distributed manner, and a plurality of slave units installed corresponding to a data collection device. A second wireless communication device having an inter-machine direct communication mode, wherein the first and second wireless communication devices are arranged between a plurality of first wireless communication devices or between the first wireless communication devices and the first wireless communication device. Wireless connection means for connecting to the second wireless communication device via a wireless channel using a direct communication mode between slave units; and data generated by the plurality of data sources connected by the wireless connection means. A data transmission unit for transmitting the data from the first wireless communication device to the second wireless communication device via the selected wireless channel and storing the data in the data collection device. 2. The wireless connection unit includes a connection unit that sequentially accesses the plurality of first wireless communication devices from the second wireless communication device and connects the plurality of first wireless communication devices via a wireless channel in a direct communication mode between handset units. And the data transmission unit transmits data generated by the plurality of data sources from the first wireless communication device to the second wireless communication device via the wireless channel by the connection unit. The data collection system according to claim 1, wherein the data is stored in a data collection device. 3. The wireless connection means sequentially relay-connects the plurality of first wireless communication devices in a predetermined order, and thereafter, the first wireless communication device becomes the last connection order by the relay connection.
Connection means for connecting between the wireless communication device and the second wireless communication device, wherein the data transmission means transmits the data generated by the plurality of data sources to the plurality of data sources by the connection means. 2. The data collection system according to claim 1, wherein the data is sequentially transmitted to the second wireless communication device via the first wireless communication device and stored in the data collection device. 4. The wireless connection means, wherein the second wireless communication device is capable of communicating with the second wireless communication device in a direct communication mode between slave units among the plurality of first wireless communication devices. First connection means for sequentially accessing from a wireless communication device and connecting via a wireless channel in a direct communication mode between slave units; and a second connection means excluding the first group among the plurality of first wireless communication devices. The wireless communication devices belonging to the group are sequentially relay-connected in a predetermined order, and thereafter, the connection between the first wireless communication device and the second wireless communication device, which is the last connection order by the relay connection, is connected. A second connection unit, wherein the data transmission unit transmits data generated by a data generation source corresponding to the first group from the first wireless communication device to the second connection unit by the first connection unit. Wireless communication First transmission means for transmitting the data generated by the data generation source corresponding to the second group to a plurality of first wireless devices belonging to the second group, respectively; 2. The data transmission device according to claim 1, further comprising: a second transmission unit for transmitting the data to the second wireless communication device by the second connection unit via the communication device sequentially and storing the data in the data collection unit. Collection system. 5. The first and second wireless communication devices,
2. The data collection system according to claim 1, further comprising means for variably setting an execution timing of a data collection operation from the plurality of first wireless communication devices to the second wireless communication device according to a time zone. 6. A monitoring means for monitoring a state of a data generation source corresponding to the first wireless communication apparatus during a data transmission waiting period, wherein each of the plurality of first wireless communication apparatuses includes: When a failure of the power source is detected, a wireless channel is set in the direct communication mode between slave units directly with the second wireless communication device or via another first wireless communication device. 2. The data collection system according to claim 1, further comprising alarm information transmitting means for transmitting alarm information to the second wireless communication device via the channel. 7. Each of the plurality of first wireless communication devices includes monitoring means for monitoring a state of the wireless communication device performing communication in the direct communication mode between slave units, and a failure of the wireless communication device is detected by the monitoring means. 5. The data transmission device according to claim 3, further comprising: a detour transmission unit that transmits data to another wireless communication device capable of communicating in a predetermined direct communication mode between child devices when the data is detected. Collection system. 8. A plurality of first wireless communication devices having a direct communication mode between slave units installed corresponding to a plurality of data sources arranged in a distributed manner, and a plurality of slave units installed corresponding to a data collection device. A second wireless communication device having an inter-machine direct communication mode, wherein the data collection system transmits and collects data from the plurality of data sources from the first wireless communication device to the second wireless communication device A communication device used as the second wireless communication device, wherein the wireless connection means connects to the first wireless communication device via a wireless channel using a direct communication mode between handset units; Data transmission means for accumulating in the data collection device data generated by the data generation source and received via the wireless channel connected by the wireless connection means. Communication apparatus according to claim. 9. A plurality of first wireless communication devices having a direct communication mode between slave units installed corresponding to a plurality of data sources arranged in a distributed manner, and a plurality of slave units installed corresponding to a data collection device. A second wireless communication device having an inter-machine direct communication mode, wherein the data collection system transmits and collects data from the plurality of data sources from the first wireless communication device to the second wireless communication device In the communication device used as the first wireless communication device, a connection is made to the first wireless communication device or the second wireless communication device via a wireless channel using a direct communication mode between slave units. Wireless connection means; and data transmission means for transmitting data generated by the plurality of data generation sources via a wireless channel connected by the wireless connection means. Communication device.