JPH10173789A - Phs terminal equipment and data collection system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively perform a collection and analysis of data without loading excess load to a center equipment by succeeding and transmitting data, which are generated by plural data generators, to the center equipment, while selecting any optimum route for more surely transmitting the data between PHS(personal handy system) terminal equipment. SOLUTION: A PHS terminal equipment A-E loaded on plural automatic vending machines is communicated and connected through a public line network to the host computer of a business office, while defining A as a master equipment and B-E as a slave terminal equipment. At the PHS terminal equipment A-E, its storage part stores an entry table for management and a connection table to which electric field strength levels measured between the respective pieces of equipment are inputted. While these respective tables are in use, the transmission of data is executed by selecting the optimum transmission route of high numerical value which expresses certainty of data transmission among the PHS terminal equipment A-E. Thus, the business office can inexpensively collect data by reducing the load of its own equipment, while using the data throughput of respective PHS terminal equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PHS configured to collect data from a device that generates data.
The present invention relates to a terminal device and a data collection system that collects and processes data using the terminal device.

[0002]

2. Description of the Related Art In recent years, along with the progress of various communication functions, data such as sales summaries from devices or sales offices distributed at each point are transmitted by using a communication device, so that the data can be transmitted from a remote place. Systems that automatically collect data have become widespread. As a conventional example of such a data collection system, for example, there is one shown in FIG. The data collection system includes a large computer 2 (center device) installed in the center 1 and a communication device 3.
On the other hand, the communication device 5 is also provided in the data generation device 4, and the data generated by the data generation device 4 is transmitted and collected using the communication device 3 and the communication device 5. The data generation device 4 includes data generation devices 4a, 4b,
When the data generating devices 4a, 4b, 4c,...
c,... corresponding to the communication devices 5a, 5b, 5c,.
... are provided. When data is collected by the computer 2 of the center 1, data is first collected from the center 1 by making a telephone call to the data generating device 4a, and then the data is collected by making a telephone call to the data generating device 4b. Then, a call is made to the data generation device 4c to collect the data, for example, and the data is collected from each data generation device 4 by individually communicating. When a new data generation device (for example, 4d) and a communication device (for example, 5d) attached to the new data generation device are added to the communication network, registration processing to the center 1 is performed by the operator, and the added data generation device 4d becomes It becomes possible to communicate with the computer 2.

[0003]

However, in the above-mentioned conventional data collection system, the data generation device 4
When collecting data from the center 1, the communication is individually performed to collect data from the respective data generating devices 4. Therefore, the computer 2 installed in the center 1 uses the data generating device. The number of calls must be equal to that of the number 4, and the operation is complicated.
In addition, since communication is performed with a plurality of data generation devices 4, communication costs are increased. Further, when data generating devices are added along with the expansion of business, the operator has to work with the operator to register the added data generating devices 4 at the center. Was getting messy.

The present invention has been made in view of the above problems, and has as its object to provide a terminal capable of collecting data from a data generation device at a low cost without imposing an excessive load on a computer device of a center. And a data collection system using the same.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides, as a data collection system, a plurality of devices for generating data, and a PHS terminal provided in each of the plurality of data generation devices. And a center device configured to collect and analyze data generated by the plurality of data generation devices, and a path through which data generated by each data generation device can be transmitted more reliably between PHS terminal devices. The gist is that an (optimal route) is selected and inherited and transmitted to the center device.

[0006] The PHS (Personal Handy Phone System) is a simple system capable of making a telephone call and data communication in a wireless system. The communication terminal device used for this system has high functions and is downsized. It is so small that it can be installed in a small space. This P
The HS terminal device is attached to a data generation device, and data is collected by telephone with the center.

The present invention has the following operation by the above-described configuration. That is, since the PHS terminal itself has a telephone function, communication is performed not only in one way from the center to the data generation device, but also in communication from the data generation device to the center or between data generation devices. Can be. Also, by using the PHS terminal device, when communicating between the data generating devices,
Not only can data be transmitted and received using the S communication line, but also data can be transmitted and received by transceiver communication under certain conditions (distance between PHS terminal devices registered in the same master unit). Further, since the PHS terminal device has a data processing function, the PHS terminal device recognizes a connection relationship between the own terminal device and another terminal device in the PHS communication network, performs a communication operation, and establishes a connection relationship at a fixed time interval. Check that a new PHS terminal is added to the existing PHS communication device network, or
When an HS terminal device is deleted, each PHS terminal device can automatically establish a new one and update deletion.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION
A data collection system, a plurality of devices for generating data, a plurality of PHS terminal devices provided in each of the plurality of data generation devices to construct a PHS communication network capable of data transmission, and the plurality of data generation devices And a center device that collects and analyzes the data generated by the PHS terminal device, and relays the data generated by each data generation device between a plurality of PHS terminal devices while selecting a route that allows more reliable data transmission. The communication is performed not only in one-way from the center to the data generation device, but also can be executed from the data generation device to the center or between the data generation devices, In addition, the transmission data can be transmitted reliably.

[0009] The invention described in claim 2 of the present invention is claim 1.
In the data collection system using the PHS terminal device described in the above, a communication unit for taking in data from a data generation device, a storage unit for storing the taken-in data, and a wireless device for sending data wirelessly through a PHS communication line are provided in the PHS terminal device. A communication unit and control means for controlling the operation of communication and data processing, and selecting a path through which the communication can be performed more reliably during the communication operation and executing the communication operation; This has the effect that reliable data transmission can be realized.

The third aspect of the present invention is the first aspect of the present invention.
In the data collection system using the PHS terminal device described in the above, the data generated by each data generation device,
In relay transmission between PHS terminal apparatuses, a transmission path is selected such that a path having a higher electric field strength level is a path through which data transmission can be performed more reliably. Is used as an element of data transmission path selection, and has an effect that high-quality communication can be performed with a simple configuration and processing.

The invention according to claim 4 of the present invention is the invention according to claim 3.
In the data collection system using the PHS terminal device described in the above, the data generated by each data generation device,
The relay transmission between the PHS terminal devices is executed using a transceiver function between the PHS terminal devices or a PHS wireless communication network, and has an effect that a large amount of data can be transmitted at low cost.

The fifth aspect of the present invention is the third aspect of the present invention.
In the data collection system using the PHS terminal device according to any one of claims 4 to 4, a predetermined PHS terminal device among the plurality of PHS terminal devices is provided with a function as a parent device that controls a plurality of child devices. The parent terminal device collects and transmits data transmitted by issuing a data collection request to subordinate child terminal devices, and further transmits data from the parent terminal device to the center device. This has the effect that data collection of the PHS terminal device can be performed efficiently.

The invention according to claim 6 of the present invention is the invention according to claim 3.
In the data collection system using the described PHS terminal device, the PHS terminal device has, as an entry table, data representing the contents of all PHS terminal devices incorporated in the PHS communication network. It has an effect that determination and recognition of the telephone number of the terminal device, the upper / lower relationship as the communication device, the parent-child relationship, etc. can be easily performed.

The invention according to claim 7 of the present invention is the invention according to claim 6
In the data collection system using the described PHS terminal device, the PHS terminal device
Data indicating the connection relationship between all PHS terminal devices in the HS communication network is provided as a connection table, and it is determined whether communication connection between a plurality of PHS terminal devices is possible, impossible, or a network configuration. Has the effect that recognition can be easily performed.

The invention according to claim 8 of the present invention is the invention according to claim 7
In the data collection system using the PHS terminal device described above, the connection table expresses the connection relationship between the PHS terminal devices by a numerical value representing the reliability of data transmission. Has an effect that determination and recognition such as reliability of data transmission during a communication operation can be easily performed.

According to the ninth aspect of the present invention, an eighth aspect is provided.
In the data collection system using the PHS terminal device described above, the numerical value representing the reliability of data transmission is obtained based on the electric field intensity level between the PHS terminal devices, and the measurement of the electric field intensity usually performed is performed. Is used as an element of data transmission path selection, and has an effect that high-quality communication can be performed with a simple configuration and processing.

According to a tenth aspect of the present invention, in the data collection system using the PHS terminal according to the eighth or ninth aspect, the PHS terminal transmits data from its own terminal to a target terminal. In this case, the smallest numerical value among the numerical values representing the reliability of data transmission is deleted from the connection table, and the transmission path is determined using the path in which the numerical data remains. It has the effect of selecting a higher transmission path to achieve high quality data transmission.

[0018] According to an eleventh aspect of the present invention, in the data collection system using the PHS terminal according to the tenth aspect, the PHS terminal sets the smallest numerical value among the numerical values representing the reliability of data transmission. When there are a plurality of transmission paths that have been deleted and determined, the transmission paths are sequentially deleted in ascending numerical order until only one optimal transmission path is determined. It has the effect of realizing high quality data transmission.

According to a twelfth aspect of the present invention, in the data collection system using the PHS terminal according to the eleventh aspect, the PHS terminal transmits data from its own terminal to a target terminal. When the numerical value representing the reliability of data transmission is sequentially deleted from the connection table in ascending order, if the transmission path from the own terminal device to the target terminal device is not established, the last deleted numerical value is connected. The optimal transmission route is calculated by restoring the data in the table, and the numerical value indicating the reliability of data transmission is deleted sequentially from the smallest one, and finally the optimal transmission route is selected to achieve high quality. It has the effect of realizing data transmission.

According to a thirteenth aspect of the present invention, in the data collection system using the PHS terminal device according to any one of the tenth to twelfth aspects, the PHS terminal device transmits the data from its own terminal device based on the connection table. It is possible to create a transmission path index table for determining a transmission path for transmitting data to a target terminal device at a glance, and it is possible to simplify a process of determining an optimum transmission path. Has an action.

According to a fourteenth aspect of the present invention, in the data collection system using the PHS terminal device according to the eighth aspect, a plurality of PHS terminal devices perform a communication operation for mutually confirming connection, and perform data transmission. Is determined, and has the effect of being able to respond to environmental changes where the PHS terminal device is placed.

According to a fifteenth aspect of the present invention, in the data collection system using the PHS terminal device according to the eighth aspect, a plurality of PHS terminal devices confirm the connection from one to the other according to a predetermined rule. For this purpose, a communication operation is performed to determine a numerical value indicating the reliability of data transmission, and has an effect that duplicate connection confirmation processing can be eliminated and processing can be simplified.

According to a sixteenth aspect of the present invention, in the data collection system using the PHS terminal according to the fifteenth aspect, a management number is assigned in advance to each of the plurality of PHS terminals, and one of the PHS terminals is provided. The device performs a communication operation to confirm the connection to the PHS terminal device having a higher management number than its own terminal device, and determines a numerical value indicating the reliability of data transmission without performing a communication operation to other PHS terminal devices. This has the effect of eliminating redundant connection confirmation processing and simplifying the processing.

According to a seventeenth aspect of the present invention, in the data collection system using the PHS terminal device according to the fifteenth aspect, a management number is assigned to each of a plurality of PHS terminal devices in advance, and one of the PHS terminal devices is provided. The device performs a communication operation for connection confirmation with the PHS terminal device having a smaller management number than its own terminal device, and determines a numerical value indicating the reliability of data transmission without performing a communication operation with other PHS terminal devices. This has the effect of eliminating redundant connection confirmation processing and simplifying the processing.

[0025] According to an eighteenth aspect of the present invention, in the data collection system using the PHS terminal device according to the sixteenth or seventeenth aspect, a partner PHS terminal device that performs a communication operation for connection confirmation is a parent terminal device. In the case of, the communication operation for connection confirmation is performed regardless of the management number of the partner PHS terminal device being larger or smaller than the management number of the own terminal device. This has the effect of reducing the burden and leaving room for the execution of management processing.

According to a nineteenth aspect of the present invention, in the data collection system using the PHS terminal according to any one of the sixteenth to eighteenth aspects, the parent terminal does not perform a communication operation for connection confirmation. It is like that,
The parent terminal device has an effect of reducing the load of the connection confirmation process and leaving room for performing the management process.

According to a twentieth aspect of the present invention, in a data collection system using the PHS terminal device according to any one of the fourteenth to nineteenth aspects, a communication operation for confirming connection is performed between the PHS terminal devices. The electric field strength level is measured in accordance with the above, and a numerical value indicating the reliability of data transmission is determined based on the measured value, and the usual electric field intensity measurement is used as an element of data transmission path selection. Has the effect that high-quality communication can be performed with a simpler configuration and processing.

According to a twenty-first aspect of the present invention, in the data collection system using the PHS terminal device according to the fourteenth or fifteenth aspect, the numerical value representing the reliability of data transmission is obtained by a communication operation for connection confirmation. It is updated with the given numerical value, and has the effect of keeping the reliability of data transmission high by keeping the data in the connection table up to date.

According to a twenty-second aspect of the present invention, in the data collection system using the PHS terminal device according to the twenty-first aspect, the updating of the numerical value indicating the reliability of data transmission is performed by comparing the previous numerical value with the present numerical value. Is calculated by performing a predetermined weighting on the transmission path, and has an effect of searching for a transmission path that is more appropriate for communication when selecting a transmission path.

According to a twenty-third aspect of the present invention, in the data collection system using the PHS terminal device according to any one of the twenty-first to twenty-second aspects, when updating a numerical value representing the reliability of data transmission, a connection is established. The relevant part of the connection table of the PHS terminal device that has performed the communication operation for confirmation is rewritten, and only the data related to the own terminal device needs to be rewritten. Can be reduced.

According to a twenty-fourth aspect of the present invention, in the data collection system using the PHS terminal device according to the twenty-third aspect, the connection table is transmitted from the child terminal device to the parent terminal device. A revised connection table is created by combining the connection tables sent from all the child terminal devices, and this revised connection table is distributed to all the child terminal devices. This has the effect of simplifying the confirmation process.

According to a twenty-fifth aspect of the present invention, in the data collection system using the PHS terminal device according to any one of the twenty-first, twenty-second, and twenty-fourth aspects, the PHS terminal device includes timer means, In addition to the processing operation, the communication operation for confirming the connection, the operation of updating the numerical value indicating the reliability of data transmission, and the operation of transmitting the connection table are executed within a fixed time schedule. There is an effect that various processing operations of the terminal device can be executed with effective time distribution.

According to a twenty-sixth aspect of the present invention, in the data collection system using the PHS terminal according to the twenty-third aspect, when a new PHS terminal is added to the PHS communication network, the newly added PHS terminal is added. The device communicates with the existing PHS terminal device determined in advance, receives the distribution of the connection table, performs a communication operation for confirming the connection to another PHS terminal device based on the connection table, Creates a new connection table to which the own terminal device has been added, and this new connection table is for data transmission to the parent terminal device, and automates the process of joining a new PHS terminal device to the PHS communication network. It has the effect of doing.

According to a twenty-seventh aspect of the present invention, in the data collection system using the PHS terminal according to the twenty-sixth aspect, the parent terminal is connected to all the child terminals including the new PHS terminal. Receiving the transmission of the table,
The revised connection table is created by combining these received connection tables, and the revised connection table is distributed to all the child terminal devices, and the new PHS terminal device is connected to the PHS communication network. Other P of the subscription
This has the effect of automating the notification process to the HS terminal device.

According to a twenty-eighth aspect of the present invention, in a data collection system using the PHS terminal device according to any one of the tenth to thirteenth aspects, a result of performing an optimum path search processing operation in a PHS communication network. When a plurality of transmission paths exist and the number of relays is the same, the transmission path with the smaller management number at the branch destination is selected, and the path selection processing caused by the transmission path branching is performed. Has the effect of eliminating the malfunction of

According to a twenty-ninth aspect of the present invention, in a data collection system using the PHS terminal device according to any one of the tenth to thirteenth aspects, a result of performing an optimum path search processing operation in a PHS communication network. When there are multiple transmission paths and the number of relays is different, the transmission path with the smaller number of relays is selected.If the communication is reliable, the transmission path with the higher transmission speed is selected. This has the effect of realizing high-speed communication.

According to a thirtieth aspect of the present invention, a PHS
A communication unit for receiving data from a data generating device, a storage unit for storing the received data, a wireless communication unit for wirelessly sending data through a PHS communication line, and more reliable communication during a communication operation. Control means for controlling operations of communication and data processing by selecting a path and executing a communication operation, and has an effect of executing a communication operation of higher quality.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram schematically showing one connection configuration example of a PHS communication network constructed in the data collection system of the present invention. Symbols A, B, C, D, and E represent individual PHS terminal devices, each of which has a position as a node and constructs a PHS communication network. In this embodiment, of the PHS terminal devices A to E, the PHS terminal device A is a parent terminal device, and the other PHS terminal devices BE are child terminal devices under the control of the PHS terminal device A. The lines connecting the PHS terminal devices represent communication lines that can be directly connected to each other, and the numerical values attached to the communication lines are numerical values representing the reliability of data transmission and the PHS terminal devices from which the numerical values are determined. Represents the electric field strength between them. That is, for example, among 35 dBμ: 10 between the PHS terminal devices A and B, “35 dBμ” is PH
The electric field strength between the S terminal devices A and B, "10" is a numerical value representing the certainty of data transmission set according to the electric field strength.

FIG. 2 is a block diagram showing a circuit configuration of an embodiment of a PHS terminal device used in the data collection system of the present invention and a connection state with an external device. This PHS terminal device is attached to each of the data generation devices 4 similar to that shown in FIG. 16 and operates as a data collection function unit and a data communication function unit. Examples of the data generating device 4 include vending machines for juice and the like, office devices such as copy machines (counting consumption of recording paper and the like), image photographing devices such as monitoring cameras, control computers for various manufacturing devices, temperature and humidity, and the like. Measuring devices, air conditioners,
Devices that generate or store various data, such as gas meters, power meters, and parking meters, are included. FIG.
In the figure, reference numeral 11 denotes a central processing unit as control means for controlling the overall operation of the PHS terminal device. The central processing unit 11 executes and controls not only the communication operation of the PHS terminal device but also the entire operation of data processing. Various functional units are provided to execute the processing operation of the central processing unit 11 quickly and efficiently. Is provided. 12 is a program storage unit that stores an operation program of the central processing unit 11, 13 is a data storage unit that stores data generated by the data generation device 4 to which the PHS terminal device is attached, or data that is received by a data communication operation. Reference numeral 14 denotes a control information storage unit in which various control information necessary for the operation of the PHS terminal device is stored.
A status display lamp for notifying the operating status of the S terminal device to the outside, 16 is a clock (timer) for taking the timing of the processing operation in the central processing unit 11 or measuring the time and executing the operation schedule of the PHS terminal device; A display / keyboard for inputting various operation commands to the central processing unit 11 from the outside or displaying various data.

Reference numerals 18 to 21 denote various communication units for the PHS terminal device to perform a communication operation.
Reference numeral 8 denotes a communication unit A in which the PHS terminal device performs wireless communication with the center 1 or another PHS terminal device using a PHS communication line, and 19 denotes a communication unit in which the PHS terminal device communicates with the center 1 using a wired communication line. Communication unit B
The modem 22 is connected to the communication line. 20 is P
The communication units C and 21 in which the HS terminal device performs wired communication with another external device 23 using a wired communication line
The S terminal device uses the wired communication line to maintain the maintenance terminal 24.
And a communication unit D for performing wired communication. Communication unit A1
Numeral 8 is connected to a radio unit 26 via a data transmission modem 25, and an antenna 27 is connected to the end of the radio unit 26 to transmit and receive radio waves. In FIG. 2, reference numerals 28, 29, and 30 denote connectors or ports for the PHS terminal device according to the present embodiment to realize connection with a communication line or another device. Also,
The external device 23 is for creating and inputting data necessary for various processing operations in the PHS terminal device, and a personal computer or the like is used. Maintenance terminal 24 is PHS
A personal computer or the like is used to check whether the operation of each functional unit in the terminal device is performed normally.

Various operations of the data collection system using the PHS terminal having such a configuration will be described below.

(Operation Example 1) PHS according to this embodiment
As a first operation example of a data collection system using a terminal device, there is a use in an activity of grasping a sales situation between a vending machine and a distributor managing a plurality of the vending machines. With this operation mode, PHS terminal devices having basically the same configuration as that shown in FIG. 2 are mounted on a plurality of vending machines installed at each location, and installed at a business office as a center by PHS wireless communication. Connect with the host computer. PHS terminal devices mounted on each of the plurality of vending machines are the PHS terminal devices A to E,
It is assumed that these PHS terminal devices A to E constitute one group. Then, the PHS terminal device A is set as the PHS parent terminal device, and the PHS terminal devices BE of the other vending machines in this group are set as slave stations. In addition, sales office host computer and vending machine (with parent terminal device)
Is connected to the PHS terminal device mounted on the PC via a public line network.

In such a configuration, each vending machine operates and performs vending activities at each installation location. Each vending machine records, when a product is sold, the item of the product, the number sold, the amount received, the change amount, and the selling time. The PHS terminal device collects the data of the vending machine at regular intervals, stores the collected data in the data storage unit 13, and transmits the data to the parent terminal device A using the PHS communication function or the transceiver function. Then, the parent terminal device A stores the data received from each of the child terminal devices B to E. On the other hand, a command for notifying the current situation is transmitted from the host computer of the business office at regular intervals through a public line. This command is received by the PHS terminal device A, which is the parent terminal device mounted on one vending machine, and the parent terminal device A transmits the stored data to the host computer 2 of the business office through the public line network.
Send to The data transmission from the parent terminal device A to the host computer 2 includes a case where data for each child terminal device is transmitted and a case where data for all child terminal devices are transmitted collectively. The sales office analyzes the transmitted data of each vending machine and performs maintenance such as replenishment of commodities and maintenance of the equipment for each vending machine.

Transmission of data from the child terminal devices B to E to the parent terminal device A as described above is performed by using the PH constructed as shown in FIG.
Let us consider the case of application to the S communication network.
Table 1 is stored in the data storage unit 13 of each of the PHS terminal devices A to E.
And an connection table 42 as shown in Table 2.

[Table 1]

[Table 2]

The entry table 41 stores all PHS terminal devices A incorporated in the PHS communication network.
エ ン ト リ ー E, the entry number 41a, the management number storage unit 41b assigned to each of the PHS terminal devices AE, and the PS number storage for storing the telephone numbers of the respective PHS terminal devices AE. It has a unit 41c and a device type storage unit 41d for storing device type information such as whether the PHS terminal device is a parent terminal device or a child terminal device.

The connection table 42 stores data representing the connection relationship between all the PHS terminal devices A to E in the PHS communication network. This connection relationship indicates whether the PHS terminal devices A to E can connect to each other and the reliability of data transmission by numerical values,
A to E described in the vertical direction and the horizontal direction in this table represent respective PHS terminal devices. That is, when any of the sets of the PHS terminal devices A to E cannot be connected to each other (for example, like the PHS terminal device A and the PHS terminal device C), they are represented by a numerical value “0” and are connectable. In some cases, the certainty of data transmission is displayed in different levels from the numerical value “1” to the numerical value “15”. In this embodiment, the level division is determined based on the electric field strength between the PHS terminal devices A to E. Table 3 shows the relationship between the level as a numerical value representing the reliability of data transmission and the electric field strength that determines this level.

[Table 3]

The numerical value representing the reliability of data transmission is obtained by actually performing a communication operation for confirming connection between two PHS terminal devices A to E and measuring the electric field strength. Is obtained based on the data of the above, and written into the connection table 42 of Table 2. The numerical value representing the reliability of data transmission obtained in this way is, for example, P
When viewed between the HS terminals A and B, as already described above, the electric field strength measured between the PHS terminals A and B is 35 dBμ, which is a level which is a numerical value indicating the reliability of data transmission. The value is “10”.
In other sets of PHS terminal devices, numerical values indicating the reliability of data transmission are obtained in the same manner as in the above case.

Next, the actual data transmission operation between the PHS terminal devices A to E will be described. In this embodiment, for example, an operation of transmitting data from the PHS terminal E to the PHS terminal A (parent terminal) will be described.

FIG. 3 is a flowchart for explaining the actual data transmission operation between the PHS terminal devices A to E. As shown in this figure, when data transmission is started, PHS is performed in a processing step (hereinafter, simply referred to as a step) ST1.
The central processing unit 11 of the terminal device E has the smallest numerical value among the numerical values representing the reliability of data transmission in its own connection table 42 (the numerical value with the lowest electric field strength level, that is, the numerical value with the lowest data transmission reliability). ) Is deleted, that is, the lowest electric field strength level (excluding those which are initially “0”) is set to “0”. Therefore, in the connection table 42 shown in Table 2 above, the lowest electric field strength level “4” is converted to “0”, whereby a virtual connection table as shown in Table 4 is created or assumed.

[Table 4]

Next, the central processing unit 11 proceeds to step ST2.
It is checked whether data can reach from the PHS terminal device E which is the source to the PHS terminal device A which is the destination, and if it can be reached, the smallest numerical value among the numerical values representing the reliability of data transmission is checked. It is determined that there are a plurality of transmission paths that have been deleted and determined, and the process returns to step ST1.
In the connection table 42, the next smaller numerical value among the numerical values representing the reliability of data transmission is deleted, that is, the lowest electric field strength level is set to “0”. Therefore, in the connection table 42 shown in Table 2 above, the level “6” next to the lowest electric field strength level “4” is converted to “0”, and as a result, the second level as shown in Table 5 is obtained. A virtual connection table is created or assumed.

[Table 5]

Thereafter, the central processing unit 11 proceeds to step ST.
In step 2, it is checked whether data can be reached from the PHS terminal device E, which is the transmission source, to the PHS terminal device A, which is the reception destination. In such processing, in order to create the virtual connection table as described above, each PHS terminal device A
In E to E, transmission table 42 (corresponding to the virtual connection table) for searching or determining a transmission path for transmitting data to a target terminal apparatus as viewed from the own terminal apparatus. Alternatively, it may be created separately.

By repeating the above processing operations, P
A single transmission path from the HS terminal device E to the PHS terminal device A is searched, or the level value is sequentially deleted from the smaller value until it is determined. Then, as described above, when the level values are sequentially deleted from the connection table 42 in ascending order, when the transmission route from the own terminal device to the target terminal device is not established, the central processing unit 11 The process proceeds to step ST3, and the numerical value deleted last is restored in the virtual connection table. This processing is specifically performed by restoring the electric field strength level value that was finally set to “0” in the virtual connection table.

Next, the central processing unit 11 proceeds to step ST4.
It is checked whether there are a plurality of transmission paths from the PHS terminal apparatus E to the PHS terminal apparatus A. If there are not a plurality (only one), the transmission path remaining in step ST5 is the optimum transmission path. And executes data transmission. FIG. 4 shows an example of the transmission path selected by such processing. In this example, the level values “4”, “6”, and “8” are converted to “0” by sequentially deleting the level values from the connection table 42 in ascending numerical order. When the level value “10” is set to “0”, the transmission path from the PHS terminal device E to the PHS terminal device A is not established, and the numerical value “10” finally deleted by the central processing unit 11 is virtually connected. Undo processing is performed in the table. As described above, when selecting one transmission path from a plurality of transmission paths during data transmission between the PHS terminal apparatuses A to E, the communication connection is performed by sequentially deleting the level values from the connection table 42 in ascending numerical order. Since the number of possible transmission paths is reduced, the last remaining transmission path becomes a transmission path with high data transmission reliability, and transmission errors and the like hardly occur, so that more reliable data transmission can be performed.

On the other hand, the central processing unit 11 proceeds to step ST4.
If it is determined in step ST6 that there are a plurality of transmission paths, it is checked in step ST6 whether the number of relays is the same for these plurality of transmission paths. Data transmission is performed by selecting a younger transmission path. When it is determined in step ST6 that the number of relays is not the same, the central processing unit 11 selects a transmission path with a small number of relays and executes data transmission. Data transmission is performed through the above-described processing procedures.

FIGS. 5 and 6 are diagrams for explaining a state in which a transmission path is selected by the above-described processing in a transmission path having a configuration different from the transmission paths of FIGS. 1 and 4.
FIG. 5 shows that, when a plurality of transmission paths exist for transmitting data from the PHS terminal device D to the PHS terminal device A and the number of relays is the same, the management number 41b of the branch destination by the process of step ST7 becomes larger. The young transmission path (in this case P
HS terminal device B is younger than C). FIG. 6 shows a state in which a plurality of transmission paths exist for transmitting data from the PHS terminal apparatus D to the PHS terminal apparatus A and the number of relays is different, and a transmission path having a small number of relays is selected by the process of step ST8. Represent.

(Operation Example 2) Next, a connection confirmation operation between the PHS terminal devices A to E will be described. This connection confirmation processing is executed by performing communication for connection confirmation between the PHS terminal devices A to E. As one method, a communication operation for connection confirmation is performed between the PHS terminal devices A to E, an electric field strength between the two PHS terminal devices is measured during the communication, and data transmission is performed based on the measured value. There is a method of determining a numerical value (level value) representing the certainty of the image.
This method is, for example, a PHS terminal A and a PHS terminal B
Between the PHS terminal device A and the PHS terminal device B, a communication operation for confirming the connection is performed, and the PHS terminal device B also performs a communication operation for confirming the connection from the PHS terminal device A to the PHS terminal device A. Then, a communication operation for confirming duplicate connection is performed.

On the other hand, as another method, a plurality of P
There is also a method in which the HS terminal devices A to E perform a communication operation for connection confirmation from one to the other according to a predetermined rule to determine a level value. FIG. 7 is a flowchart for explaining a communication operation for such connection confirmation. In this figure, when a communication operation for connection confirmation is started, the central processing unit 11 checks in step ST11 whether or not its own terminal device is a parent terminal device. The communication operation for is immediately terminated. Thus, parent terminal device A can be prevented from performing a communication operation for connection confirmation. This is because the parent terminal device A is provided with a process of receiving and counting data of the other child terminal devices B to E,
This is to reduce the load on the processing operation as much as possible.

Next, when it is determined in step ST11 that the own terminal device is not the parent terminal device, the central processing unit 11 searches the entry table 41 in step ST12, and then in step ST13 another PHS terminal device Check if there is, PHS other
If there is no terminal device, the communication operation for confirming the connection is terminated. On the other hand, if there is another PHS terminal device, it is checked in step ST14 whether or not the terminal device is a parent terminal device.
At T15, it is checked whether or not the management number (device number) of the PHS terminal device is larger than the management number of the terminal device itself. Note that a management number 41b is assigned in advance to each of the PHS terminal devices A to E. If the management number of the PHS terminal is not larger than the management number of the own terminal, the process proceeds to step ST12. On the other hand, if the management number of the PHS terminal is larger than the management number of the own terminal. In step ST16, a communication operation for confirming connection to the PHS terminal device is executed. On the other hand, if it is determined in step ST14 that the terminal device is the parent terminal device, the process proceeds to step ST16 without performing the determination process in step ST15.
And the communication operation for confirming the connection to the PHS terminal is executed.

By such a processing operation, one PHS
The terminal device performs a communication operation for connection confirmation only with a PHS terminal device having a higher management number than its own terminal device, and can determine a level value without performing a communication operation with other PHS terminal devices. . Note that, unlike the above-described operation, one PHS terminal device performs a communication operation for connection confirmation only with a PHS terminal device having a smaller management number than its own terminal device, and performs a communication operation with the other PHS terminal devices. The level value may be determined without performing the above operation. When it is determined that the partner PHS terminal device that performs the communication operation for connection confirmation is the parent terminal device A, as in the process of step ST14, the management number of the partner PHS terminal device is changed to the own terminal device. It is also possible to perform a communication operation for connection confirmation regardless of the management number of the parent terminal device A, and to always perform connection confirmation for the parent terminal device A.

FIGS. 8 and 9 are flow charts for explaining the details of the connection confirmation processing in step ST16 over the first half and the second half. In these figures, when the connection confirmation processing is started, the central processing unit 11 makes a call to the PS number (telephone number) in the entry table in step ST21, and makes a call to the partner PHS terminal device by the call in step ST22. Check whether communication was possible between the two. Then, when communication with the partner PHS terminal device is established, a process of measuring the electric field strength level between the PHS terminal devices is performed in step ST23. Next, the central processing unit 11 checks whether or not the electric field intensity has been measured in step ST24. If the electric field intensity can be measured, the central processing unit 11 performs this measurement three times in step ST25, and obtains a new value from the average value of the three measured values. Calculate the level value. On the other hand, step ST2
If the communication cannot be performed with the partner PHS terminal device in step 2, and if the electric field strength cannot be measured in step ST24, the new level value is set to “0” in step ST26. Next, the central processing unit 1
In step ST27, it is checked whether or not the previous level value with the PHS terminal device is "0". If it is not "0", (the previous level value × 2 + the currently measured level value) ) / 3 A decimal point is rounded off, and a new level value is calculated by performing a predetermined weighting on the previous numerical value and the present numerical value. On the other hand, if the previous level value is "0" in step ST27, the new level value is used as it is in step ST28. In this way, in the connection confirmation process, the electric field strength level between the PHS terminal devices is measured, and a level value indicating the reliability of data transmission is determined based on the measured value,
By updating the corresponding part of the connection table with the level value obtained in this way, is updated. The new level value may be a new level value using the current measured value of the electric field strength as it is, or the weight of the weight may be variously changed. In any case, it is preferable to select an optimal form for the data collection system using the actually installed PHS terminal device.

(Operation Example 3) FIG. 10 is a flowchart for explaining a communication operation for confirming connection different from the operation shown in FIG. In this process, the parent terminal device A does not perform the communication operation for connection confirmation as in the previous process, and the parent terminal device A also performs the connection confirmation at the same level as the child terminal devices B to E. Communication operation is performed. In FIG. 10, when the communication operation for connection confirmation is started, the central processing unit 11 searches the entry table 41 in step ST31, and then checks in step ST32 whether or not there is another PHS terminal device.
If there is no other PHS terminal device, the communication operation for connection confirmation ends. On the other hand, if there is another PHS terminal device, in step ST33, it is checked whether or not the management number (device number) of the PHS terminal device is larger than the management number of its own terminal device. If the management number of the PHS terminal device is not higher than the management number of the terminal device itself, the process proceeds to the entry table search process in step ST31, while the management number of the PHS terminal device is higher than the management number of the terminal device. If it is larger, in step ST34, a communication operation for confirming connection to the PHS terminal device is executed.

The new connection table created as described above is transmitted or transferred to the parent terminal device A. FIG.
FIG. 5 is a flowchart for explaining a connection table transfer processing operation. As shown in this figure, the central processing unit 11 performs a connection confirmation process in step ST61, and then performs step S61.
At T62, a table transfer process to the parent terminal device is performed. In step ST63, the optimum transmission path is determined or searched based on the connection table 42. The search for the transmission path is the same as that described above with reference to the flowchart of FIG.

(Operation Example 4) FIGS. 11 and 12 show that the parent terminal updates the connection table when the connection table updated by the connection confirmation described above is sent from the child terminal to the parent terminal. FIG. 9 is a flowchart for explaining an update processing operation performed for the first embodiment. Among them, FIG. 11 explains the update processing operation when the parent terminal device is not special in the connection confirmation process (the parent terminal device A also performs the communication operation for the connection confirmation at the same level as the child terminal devices B to E). FIG. 12 is a flowchart for explaining the update processing operation when the parent terminal device is special in the connection confirmation process (the parent terminal device A does not perform the communication operation for the connection confirmation). .

When the update processing operation is started in FIG. 11, the central processing unit 11 checks the management number (device number) of the PHS terminal device to which the connection table data is sent in step ST41, and then sends it in step ST42. Look at the row of the management number of the destination PHS terminal device in the incoming connection table 42. Next, in step ST43, the central processing unit 11 reflects the electric field strength level value of the PHS terminal device having a management number larger than the management number of the destination PHS terminal device in the connection table 42 of the terminal device itself, and ends a series of update processing operations. I do.

In FIG. 12, when the update processing operation is started, the central processing unit 11 checks in step ST51 the management number (device number) of the PHS terminal device to which the connection table data is sent, and then proceeds to step ST52.
PHS of connection table 42 sent in
Look at the line for the management number of the terminal device. Next, the central processing unit 11
In step ST53, the field strength level value of the PHS terminal apparatus having the management number larger than the management number of the destination PHS terminal apparatus and the field strength level value of the parent terminal apparatus are reflected in the connection table 42 of the own terminal apparatus, and a series of updating is performed. The processing operation ends.

FIG. 14 is a time sequence diagram for explaining an example of the contents of such a table transfer operation. In the case of this figure, as shown in FIG. 14B, the PHS terminal device A can communicate with the PHS terminal devices B and C, and
In a PHS communication network in which the PHS terminal D can communicate only with the PHS terminal B, table transfer between the parent terminal A and the child terminals B to D is performed as shown in FIG.
This is described in (a). The connection table 42 of the PHS terminal D is transferred to the PHS terminal B, and further transferred from the PHS terminal B to the parent terminal A. The connection table 42 of the PHS terminal device C is directly transferred to the parent terminal device A. The connection table 42 of the PHS terminal B is also transferred directly to the parent terminal A. The parent terminal device A combines the connection tables sent from the child terminal devices B to D to create a connection table for the entire PHS communication network. Then, the entire connection table is distributed to the PHS terminal devices B, C, and D, which are the child terminal devices. Confidentiality to the PHS terminal D is performed by relaying the PHS terminal B.

(Operation Example 5) FIG. 15 is a time sequence diagram illustrating an example of a connection confirmation process and a table transfer process operation when a new PHS terminal device joins a PHS communication network. In the case of this figure, FIG.
A PHS terminal device D is connected to a PHS communication network in which the PHS terminal devices A, B, and C can communicate with each other as shown in FIG.
FIG. 15 shows various processing operations when a user is newly subscribed.
This is described in (a). When the PHS terminal device D is newly subscribed, the PHS terminal device D becomes a predetermined existing PHS terminal device (in this embodiment, PH
A connection request is sent to the S terminal device B), and the connection table 42 is distributed from the PHS terminal device B. And PHS
The terminal device D creates a new connection table in which the own terminal device is added to the received connection table 42, and executes a communication operation for connection confirmation with the parent terminal device A based on the new connection table. Here, the PHS terminal device D
Fails to check the connection to the parent terminal device A,
The communication operation for confirming the connection to the S terminal device B is performed. Next, the PHS terminal device D performs a communication operation with the PHS terminal device C to confirm the connection. Then, the PHS terminal device D reflects the result of the communication operation for each connection confirmation in the connection table 42, and
2 to the parent terminal A. Connection table 4
2 is temporarily transferred from the PHS terminal D to the PHS terminal B, and further transferred to the PHS terminal A which is the parent terminal.

The parent terminal A is a new PHS terminal D
, After the connection table 42 is received, the entry table 41 is changed and updated, and the received connection table 4
In the next connection confirmation process, the transmission of the connection tables from all the child terminal devices B to D including the new PHS terminal device is received, and the received connection tables are combined to form a new whole. (Revision connection table) is created, and this connection table is distributed to all the child terminal devices B to D. Note that, in this case, the parent terminal device A transmits the entry table 41 together with the connection table.
Is distributed to all the child terminal devices B to D. Thereby, the child terminal devices B to C other than the new PHS terminal device D recognize that the PHS terminal device D has newly joined the same PHS communication network.

In this embodiment, the PHS terminal device has a clock 16 as timer means, and in addition to the operations of communication and data processing, a communication operation for confirming the connection and a numerical value indicating the reliability of data transmission. Update operation and connection table transmission operation can be executed in a fixed time schedule. Further, in this embodiment, the numerical value representing the reliability of data transmission is obtained based on the electric field strength level between PHS terminal devices, but may be obtained based on other factors.

[0070]

As described above, according to the present invention,
As a data collection system, a plurality of devices that generate data, a PHS terminal device provided in each of the plurality of data generation devices, and a center device that collects and analyzes data generated by the plurality of data generation devices. The data generated by each data generation device is transmitted between the PHS terminal devices to the center device while selecting a path through which the data can be transmitted more reliably. It is possible to communicate not only in one way to the generating device, but also from the data generating device to the center or between the data generating devices. Also, by using the PHS terminal device, when communicating between the data generating devices,
Not only can data be transmitted and received using the S communication line, but also data can be transmitted and received by transceiver communication under certain conditions (distance between PHS terminal devices registered in the same master unit). Further, since the PHS terminal device has a data processing function, the PHS terminal device recognizes a connection relationship between the own terminal device and another terminal device in the PHS communication network, performs a communication operation, and establishes a connection relationship at a fixed time interval. Check that a new PHS terminal is added to the existing PHS communication device network, or
When the HS terminal device is deleted, various effects can be obtained such that each PHS terminal device can automatically establish a new one or update the deletion.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a PHS communication network constructed by a PHS terminal device according to an embodiment of the present invention.

FIG. 2 is a PH with a telephone function according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating an example of a circuit configuration of the S terminal device.

FIG. 3 is a flowchart for explaining an optimum route search processing operation in a data transmission operation of the PHS terminal device according to the embodiment.

FIG. 4 is a configuration diagram showing an example of a transmission path selected by an optimum path search processing operation in the PHS communication network according to the embodiment.

FIG. 5 is a diagram showing a case where a plurality of transmission paths are present and the number of relays is the same as a result of performing an optimum path search processing operation in the PHS communication network according to the embodiment, and the management number of a branch destination is smaller. Configuration diagram showing an example of a transmission path selected under the condition

FIG. 6 is a diagram showing a result of performing an optimum path search processing operation in the PHS communication network according to the embodiment, and when a plurality of transmission paths are present and the number of relays is different, a selection is made on the condition that the number of relays is smaller. Configuration diagram showing an example of a transmission path

FIG. 7 is a flowchart illustrating a connection confirmation operation in a method in which a plurality of PHS terminal devices perform a communication operation for confirming connection from one to the other according to a predetermined rule;

FIG. 8 is a flowchart for explaining the first half of the details of the connection confirmation processing;

FIG. 9 is a flowchart illustrating the latter half of the detailed contents of the connection confirmation processing;

FIG. 10 is a flowchart for explaining a communication operation for connection confirmation in a mode different from the operation shown in FIG. 7;

FIG. 11 is a flowchart illustrating an update operation when the parent terminal device performs a communication operation for connection confirmation at the same level as the child terminal device in the connection confirmation process.

FIG. 12 is a flowchart illustrating an update processing operation when the parent terminal device does not perform a communication operation for connection confirmation in the connection confirmation processing.

FIG. 13 is a flowchart illustrating a transfer processing operation of a connection table.

FIG. 14 is a time sequence chart for explaining an example of the contents of a transfer processing operation of a connection table;

FIG. 15 is a time sequence diagram illustrating an example of a connection confirmation process and a table transfer process operation when a new PHS terminal device joins a PHS communication network;

FIG. 16 is an explanatory diagram showing a schematic configuration of a conventional data collection system.

[Explanation of symbols]

 1 center 2 computer (center device) 4 data generation device 11 central processing unit (control means) 12 program storage unit 13 data storage unit 14 control information storage unit 15 status display lamp 16 clock (timer) 17 display / keyboard 18, 19, 20, 21 communication unit 22, 25 modem 23 maintenance terminal 24 maintenance terminal 26 radio unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI H04L 11/20 103A (72) Inventor Yoshiaki Tanaka 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Matsushita Communication Industrial Co., Ltd. In company

Claims (30)

[Claims] 1. A plurality of devices for generating data, and a plurality of Ps provided in each of the plurality of data generation devices to construct a PHS communication network capable of transmitting data.
An HS terminal device and a center device that collects and analyzes data generated by the plurality of data generation devices, and transmits data generated by each data generation device between a plurality of PHS terminal devices. A data collection system using a PHS terminal device, wherein a route that can be reliably performed is selected and relayed and transmitted to a center device. 2. A PHS terminal device comprising: a communication unit for receiving data from a data generating device; a storage unit for storing the received data; a wireless communication unit for transmitting data wirelessly through a PHS communication line; And control means for controlling the operation of (1) and executing a communication operation by selecting a path through which communication can be performed more reliably during the communication operation.
A data collection system using the PHS terminal device described in the above. 3. When relaying data generated by each data generation device between PHS terminal devices, a transmission path is selected on the assumption that a path having a higher electric field strength level is a path through which data transmission can be performed more reliably. 2. A data collection system using the PHS terminal device according to claim 1. 4. The relay transmission of data generated by each data generation device between PHS terminal devices is performed by PHS
4. The data collection system using a PHS terminal device according to claim 3, wherein the data collection system is executed using a transceiver function between terminal devices or a PHS wireless communication network. 5. A predetermined PHS terminal among a plurality of PHS terminal devices.
The HS terminal device is provided with a function as a parent device that controls a plurality of child devices, and the parent terminal device collects and accumulates data transmitted by issuing a data collection request to a subordinate child terminal device. 5. A data collection system using a PHS terminal device according to claim 3, wherein data is further transmitted from the parent terminal device to the center device. 6. The PHS terminal device according to claim 3, wherein the PHS terminal device has data representing contents of all PHS terminal devices incorporated in the PHS communication network as an entry table. Data collection system using. 7. The PHS terminal device, in addition to the entry table, stores all PHS in the PHS communication network.
7. A data collection system using a PHS terminal device according to claim 6, further comprising data representing a connection relationship between the terminal devices as a connection table. 8. A data collection system using a PHS terminal device according to claim 7, wherein the connection relationship between the PHS terminal devices is represented by a numerical value representing the reliability of data transmission. . 9. The numerical value representing the reliability of data transmission is PH
9. The data collection system using a PHS terminal device according to claim 8, wherein the data collection system is obtained based on an electric field intensity level between the S terminal devices. 10. When transmitting data from its own terminal device to a target terminal device, the PHS terminal device deletes the smallest numerical value among numerical values representing the reliability of data transmission from the connection table, and 10. The transmission route is determined using the remaining route.
A data collection system using the PHS terminal device described in the above. 11. When there are a plurality of transmission paths determined by deleting the smallest numerical value among the numerical values representing the reliability of data transmission, the PHS terminal apparatus keeps the small numerical value until only one optimal transmission path is determined. The data collection system using a PHS terminal device according to claim 10, wherein the data is sequentially deleted. 12. When transmitting data from its own terminal device to a target terminal device, the PHS terminal device sequentially deletes the numerical value representing the reliability of data transmission from the connection table in ascending order from a smaller numerical value. 12. The PHS terminal device according to claim 11, wherein when the transmission route from the terminal to the target terminal device is not established, the most recently deleted numerical value is restored in the connection table to determine the optimum transmission route. Data collection system using. 13. The PHS terminal device can create a transmission path determination table for determining a transmission path for transmitting data to a target terminal device viewed from its own terminal device based on the connection table. A data collection system using the PHS terminal device according to claim 10. 14. The PHS terminal according to claim 8, wherein the plurality of PHS terminal devices mutually perform a communication operation for confirming connection, and determine a numerical value representing reliability of data transmission.
A data collection system using an S terminal device. 15. The method according to claim 1, wherein the plurality of PHS terminal devices perform a communication operation for confirming connection from one to the other according to a predetermined rule, and determine a numerical value representing reliability of data transmission. 9. A data collection system using the PHS terminal device according to 8. 16. A management number is assigned to each of a plurality of PHS terminal devices in advance, and one of the PHS terminal devices communicates with a PHS terminal device having a higher management number than its own terminal device to confirm connection. Do, other P
2. The method according to claim 1, wherein a numerical value representing the reliability of data transmission is determined without performing a communication operation to the HS terminal device.
A data collection system using the PHS terminal device according to 5. 17. A management number is assigned in advance to each of a plurality of PHS terminal devices, and one of the PHS terminal devices communicates with a PHS terminal device having a smaller management number than its own terminal device to confirm connection. Do, other P
2. The method according to claim 1, wherein a numerical value representing the reliability of data transmission is determined without performing a communication operation to the HS terminal device.
A data collection system using the PHS terminal device according to 5. 18. When the partner PHS terminal that performs the communication operation for connection confirmation is the parent terminal, the partner PHS terminal
18. The data collection system using a PHS terminal device according to claim 16, wherein a communication operation for connection confirmation is performed regardless of whether the management number of the HS terminal device is larger or smaller than the management number of the own terminal device. 19. The data collection system using a PHS terminal device according to claim 16, wherein the parent terminal device does not perform a communication operation for connection confirmation. 20. In a communication operation for confirming connection, a field intensity level is measured between PHS terminal devices, and a numerical value indicating reliability of data transmission is determined based on the measured value. A data collection system using the PHS terminal device according to claim 14. 21. The PHS according to claim 14, wherein the numerical value indicating the reliability of data transmission is updated with a numerical value obtained by a communication operation for confirming connection.
A data collection system using a terminal device. 22. The PH according to claim 21, wherein the updating of the numerical value representing the reliability of data transmission is performed by applying a predetermined weight to the previous numerical value and the present numerical value.
A data collection system using an S terminal device. 23. In updating the numerical value representing the reliability of data transmission, a P which performs a communication operation for connection confirmation
23. The data collection system using a PHS terminal device according to claim 21, wherein a corresponding part of a connection table of the HS terminal device is rewritten. 24. The connection table is transmitted from the child terminal device to the parent terminal device, and the parent terminal device creates a revised connection table by combining the connection tables sent from all the child terminal devices. 24. The data collection system using a PHS terminal device according to claim 23, wherein the connection table is distributed to all child terminal devices. 25. A PHS terminal device comprising a timer means,
In addition to the operation of communication and data processing, communication operation for connection confirmation, update operation of numerical value indicating reliability of data transmission,
And transmitting the connection table in a fixed time schedule.
A data collection system using the PHS terminal device according to any one of 1, 22, and 24. 26. A new P to a PHS communication network
Upon joining the HS terminal device, the newly joined PHS terminal device communicates with the existing PHS terminal device determined in advance and receives the distribution of the connection table, and based on the connection table, transmits the connection table to other PHS terminal devices. 24. The communication device according to claim 23, wherein a communication operation for confirming the connection is performed, and a new connection table in which the own terminal device is added is created from the result, and the new connection table is transmitted to the parent terminal device. A data collection system using the PHS terminal device. 27. The parent terminal device receives connection table transmissions from all child terminal devices including the new PHS terminal device, combines these received connection tables to create a revised connection table, 27. The revised connection table is distributed to all child terminal devices.
A data collection system using the PHS terminal device described in the above. 28. As a result of performing an optimum path search processing operation in the PHS communication network, when a plurality of transmission paths are present and the number of relays is the same, the transmission path with the smaller management number at the branch destination is determined. 14. A data collection system using the PHS terminal device according to claim 10, wherein the data collection system is selected. 29. When the plurality of transmission paths are present and the number of relays is different as a result of performing the optimum path search processing operation in the PHS communication network, the transmission path with the smaller number of relays is selected. A data collection system using the PHS terminal device according to any one of claims 10 to 13. 30. A communication unit for receiving data from a data generation device, a storage unit for storing the captured data, a wireless communication unit for transmitting data wirelessly through a PHS communication line, and controlling operations of communication and data processing. A PHS terminal device comprising: a control unit, wherein the control device selects a path through which communication can be performed more reliably during a communication operation and executes the communication operation.