JP2579124B2 - Remote data collection master station equipment in teleterminal system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a teleterminal system comprising a terminal device, a base station, a common use center, and a user center. The present invention relates to a remote data collection master station device that collects data at a user center via a station.

[0002]

2. Description of the Related Art FIG. 1 is a block diagram schematically showing an overall configuration of a teleterminal system. As shown in the figure,
The teleterminal system includes a plurality of slave stations (terminal devices) 1
A base station 2 installed in each wireless zone Z constituting the service area SE and communicating wirelessly with a slave station 1 in the own wireless zone; a shared use center 3 connected to the base station 2 by wire; Wired to center 3 (wireless in some cases)
And a user center 4 which is connected by a user center 4. The mobile station 1 and the base station 2, the base station 2 and the common use center 3, and the common use center 3 and the user center 4 are all connected by packet communication. Packets are multiplexed between the user centers 4.

[0003] The slave station 1 is also called a land mobile station. Land mobile radio data communication with the base station 2 (between a base station established for the purpose of performing telecommunication services and the land mobile station). Wireless communication of a single communication path mainly performed for data transmission and wireless communication performed for controlling the wireless communication). As shown in FIG. 2, the slave station 1 includes an antenna 11, a radio unit 12 including a transmitting device and a receiving device, a polling control function of transmitting a packet at a timing designated by a polling signal from the base station 2, A communication control unit 13 having a packet disassembly / assembly function for dividing data into data packets and assembling data packets received from the base station 2 into data.
And a data processing unit 14. The data processing unit 14 is connected to a data storage unit 15 that stores data to be transmitted to the user center 4 for each type of data.

[0004] As shown in FIG. 3, the base station 2 includes an antenna 21, a radio unit 22 including a transmitting device and a receiving device,
A main part is constituted by the communication control unit 23. The communication control unit 23 has a polling control function for the slave station 1, a block assembling function for data packets received from the slave station 1, and a block division / assembly function for decomposing a data block to be transmitted to the slave station into data packets. And is connected to the shared use center 3 by wire.

[0005] For example, as shown in FIG. 4, the shared use center 3 includes a communication control unit 31 connected to the base station 2 by wire.
And a communication control unit 32 connected to the user center 4 by wire, and a packet processing unit 33 provided between the two communication control devices 31 and 32, between the slave station 1 and the user center 4. It has a function of performing packet switching of digital signals and management of the system. In particular, the shared use center 3 has a failure monitoring function, and when detecting any failure during communication, notifies the user center 4 of a failure reason code corresponding to the failure by a failure notification message or the like. The failure reason code is represented by, for example, a two-digit hexadecimal number, and typical ones are as follows.

[0008] Failure reason code “11”: belongs to the failure of the user center 4 and indicates a line failure between the shared use center 3 and the user center 4. O Failure reason code "21": belongs to the failure of the shared use center 3 and indicates a line failure between the slave station 1 and the shared use center 3. O Failure reason code "32"; belongs to the failure of the slave station 1, and indicates the failure of the radio unit 12. O Failure reason code "61": indicates that the called station identification number (R-ID) of the called slave station included in the data sent from the user center 4 to the shared use center 3 is invalid. ○ Fault reason code “64”: Indicates that the closed connection of the slave station has not been registered. O Failure reason code "68": indicates that the system is shut down. O Failure reason code "69": indicates system forced termination.

[0007] The user center 4 is a data center of a subscriber for performing data transmission, and comprises a communication control device and a remote data collection master station device as will be described later. The device collects data from each slave station 1 through the shared use center 3 and the base station 2.

[0008]

In general, a teleterminal system has the above-described configuration, and a remote data collection master station of a user center communicates during data communication like a general wired data communication system. Retry control is performed when a failure occurs. However, the content of the retry control when a communication failure occurs is fixed, and the content of the retry control is not changed according to the type of the communication failure or the phase of the communication control sequence.

Further, in the conventional teleterminal system, when the remote data collection master station is collecting data of the terminal, it is possible for the operator to monitor which terminal is communicating with the terminal. However, it was not possible to monitor how much data was received for each terminal device.

[0010] In the teleterminal system, since a radio section is partially interposed between the user center and the terminal device, line interruption occurs due to fluctuations in electric field strength during line connection or communication. Since devices such as shared use centers and base stations are interposed between terminal devices and communication failures caused by them, the types of communication failures are more diversified compared to general wired data communication systems. become. For this reason, a large amount of data / terminal (10 Kbytes to 100 Kb) is transmitted from a large number of terminal devices (for example, 50 stations) using a teleterminal system.
It is difficult to collect repetitions (yes) in a short period of time by simple retry control, and appropriate retry control according to the type of communication failure and the state of the communication control sequence.

Accordingly, a first object of the present invention is to enable a remote data collection master station device in a teleterminal system to perform appropriate retry control according to the type of communication failure and the state of a communication control sequence. It is in.

As a prior art related to retry control, as disclosed in Japanese Patent Application Laid-Open No. 2-138441, abnormal processing in a line control procedure is analyzed and the analysis result is accumulated and periodically analyzed. A technique for optimizing retry control by changing the number of retries based on the analysis results up to now is shown.However, this technique changes the contents of preset retry control according to the subsequent communication failure occurrence situation. This does not enable appropriate retry control according to the type of communication failure or the status of the communication control sequence.

Further, as described above, in the remote data collection master station device in the conventional teleterminal system, the operator cannot monitor how much data is received for each terminal device. For this reason, for example, even if the data collection process may be interrupted when a certain amount of data is received, there is a problem that it is not possible to even know the trigger of the interruption.

Accordingly, a second object of the present invention is to provide a remote data collection master station device in a teleterminal system that enables an operator to monitor the amount of data received from a terminal device in real time.

[0015]

According to the present invention, in order to achieve the first object, a remote data collection master station is provided with a predetermined phase in a communication control sequence for each predetermined communication failure reason. When a communication failure occurs during the execution of a communication control sequence for collecting data from the terminal device through the shared use center and the base station, the reason for the communication failure and the communication control. A matrix retrieving means for retrieving retry control contents corresponding to the current phase of the sequence from the control matrix, and retry control means for performing retry control in accordance with the retry control contents retrieved by the matrix retrieving means are provided.

In the retry control contents held in the control matrix, information such as a waiting time until a retry is performed when retrying is set, and some retry control contents indicate that no retry is performed. Retry control contents are also included.

According to the present invention, in order to attain the second object, the remote data collection master station displays the amount of stored data transmitted from the terminal at the data collection destination prior to the transmission of the stored data. A control unit is provided for displaying on the screen of the apparatus and displaying the received amount of accumulated data that has been transmitted until now on the screen in real time.

[0018]

In the remote data collection master station device of the teleterminal system according to the present invention, the control matrix holds retry control contents for each predetermined phase in the communication control sequence for each predetermined communication failure reason. When a communication failure occurs during the execution of the communication control sequence for collecting data from the terminal device through the shared use center and the base station, the matrix search means determines the reason for the communication failure and the current phase of the communication control sequence. Is retrieved from the control matrix, and the retry control means performs retry control according to the retrieved retry control content.

Further, the control means displays on the screen of the display device the amount of stored data transmitted prior to the transmission of the stored data from the terminal device at the data collection destination, and displays the current amount of the stored data transmitted subsequently. The amount of received data is displayed on the screen in real time.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 5 is a block diagram of one embodiment of a user center to which the present invention is applied. This user center is used as the user center 4 in the teleterminal system of FIG. 1, and includes a communication control device 41 connected to the shared use center 3 by wire, and a remote data collection master station device 42 connected thereto. It is composed of

The remote data collection master station device 42 is a device for polling the slave station 1 through the shared use center 3 and the base station 2 to collect data, and includes a data collection unit 43, a control unit 44, a file 45, It has a CRT 46 and a keyboard 47.

The data collection section 43 is a part for performing main processing of data collection, and incorporates a retry control means 431, a matrix search means 432, and a control matrix 433, which characterize the present invention.

The control matrix 433 is means for holding the contents of retry control for each predetermined phase in the communication control sequence for each predetermined reason for communication failure, and FIG. 6 shows an example of the contents. In the control matrix 433 of this example, the data collection unit 43 executes the line items such as “when sending a connection request message”, “when sending a monitor data request”, “when receiving monitor data”, and “when sending a disconnection request message”. The phases of the communication control sequence are arranged, and failure reasons such as “timeout by internal timer”, “failure reason codes 61 and 64”, “failure reason codes 68 and 69”, and “other failure reason codes” are arranged as columns. Then, at the intersection of the row and the column, the retry control content according to the situation is set.

Here, when the failure reason code is 61 or 64 (that is, the R-ID is invalid or the closed connection is not registered), the retry control contents for not performing the retry regardless of the phase are set. The reason is considered to be a mistake at the time of relocation of the slave station, so that the retry is completely useless. Also, when a failure of the failure reason codes 68 and 69 (that is, the system is shut down or the system is forcibly terminated) occurs in the phases of transmitting the connection request message, transmitting the monitor data request, and receiving the monitor data, it is comparatively 300 seconds. The reason why the retry control contents for retrying after waiting for a long time is set is that the system is blocked or the system is forcibly terminated due to the shared use center 3 or the base station 2, and is restored after waiting about 300 seconds. This is because there is a high possibility that the processing will be performed and the processing can be continued. If the standby time is set to a short time, for example, about 10 seconds, useless retries are repeated, and the efficiency is reduced. Also,
In the phase of sending the disconnection request message, the failure reason code 68,
The reason why the retry is not performed when there is a failure due to 69 is that it is considered that the purpose has already been achieved by the forced termination of the system while the system is closed. In addition,
In the case of a failure reason code other than the failure reason codes 61, 64, 68, and 69, in this example, retry is performed from the beginning after disconnection of the network.

The reason for the failure includes a timeout by the internal timer of the data collection unit 43 in addition to the reason for the failure notified from the shared use center 3. And the retry control contents are set for each phase.

Generally, retry control contents are roughly classified into those that retry and those that do not retry, and those that retry include those that retry from the beginning of the phase and those that retry from the beginning by cutting the network. There is. Furthermore, when retrying, generally, a retry interval and a maximum number of retries are set. Here, the retry interval need not always be constant, and it is possible to set so that the retry process is repeated while changing the retry interval. In short, according to the situation, the contents of the retry control are determined so that unnecessary retry processing is avoided as much as possible and a retry is attempted at an effective timing.

The matrix search means 432 is a means for searching the control matrix 433 as described above. When the retry control means 431 notifies the reason for failure and the current phase of the communication control sequence, the reason for failure is notified. The retry control unit 431 returns the retry control content set at the intersection of the column having the item and the row having the current phase of the notified communication control sequence as the item.

The retry control means 431 allows the data collection unit 43 to transmit data to the slave station 1 through the shared use center 3 and the base station 2.
When executing a communication control sequence for collecting data from the server and receiving a timeout due to an internal timer or a notification of a failure reason from the shared use center 3, a matrix search for the failure reason and the current phase of the communication control sequence is performed. This is a means for notifying the means 432 and performing retry control in accordance with the retry control contents returned from the matrix search means 432.

On the other hand, the control unit 44 controls an arbitrary plurality of slave stations 1
A data collection instruction from the operator, and causes the data collection unit 43 to execute data collection.
It is connected to a CRT 46 and a keyboard 47. As will be described later, the control unit 44 controls the slave station 1 of the data collection destination.
And a function of displaying the amount of accumulated data transmitted prior to transmission of accumulated data on the screen of the CRT 46 and displaying the received amount of accumulated data transmitted to date on the screen in real time. .

Hereinafter, the operation of this embodiment will be described focusing on the operation of the remote data collection master station 42 according to the present invention.

The remote data collection master station device 42 of the user center 4 collects data from each slave station 1 while sequentially selecting the slave stations 1. The actual data collection is performed by the data collection unit 43, transmission of a connection request message including the called station identification number of the slave station 1 to be collected this time, transmission of the monitor data request message after the completion of the call, and transmission from the slave station 1. A series of communication control sequences such as reception of transmitted data (monitor data) are executed, and the collected data is stored in the file 45 for each slave station 1. Since the shared use center 3 and the user center 4 are packet-multiplexed, data collection from a plurality of slave stations 1 proceeds in parallel. Such a communication control sequence itself is the same as that in the existing teleterminal system.

When a series of communication control sequences relating to data collection are being executed by the data collection unit 43, if a communication failure such as a timeout by an internal timer or a notification of a failure reason from the shared use center 3 occurs, the data The retry control unit 431 in the collection unit 43
The reason for the failure and the current phase of the communication control sequence are notified to the matrix search means 432.

The matrix search means 432 searches the control matrix 433 for control retry contents corresponding to the notified cause of failure and the current phase of the communication control sequence, and returns them to the retry control means 431.

The retry control means 431 performs retry control according to the returned retry control contents.

In this manner, the retry processing is performed according to the retry control contents corresponding to the situation where the failure has occurred.

Next, the operation of the control unit 44 of the remote data collection master station device 42 will be described.

When the operator selects "data collection processing" from the system menu displayed on the CRT 46, the control section 44 starts the processing shown in FIG. First,
A data collection processing screen is displayed on the CRT 46 to receive collection conditions from the operator (S1). The collection conditions include the name of the slave station at the collection destination, a collection type indicating which type of data is to be collected among a plurality of types of data possessed by the slave station, a collection time zone, a data collection interval in the collection time zone, and the like. There is.

After the operator sets necessary collection conditions on the data collection processing screen and then instructs the start of collection from the keyboard 47, the control unit 44 causes the data collection unit 43 to start data collection in accordance with the collection conditions (S2). ), CR himself
A collection status screen is displayed at T46 (S3).

FIG. 8 shows an example of a collection status screen.
For each slave station to be collected, the items of channel, slave station name, total number of blocks, and number of currently received blocks are displayed. Here, the slave station name indicates the slave station name input by the operator, and the channel indicates the channel between the data collection unit 43 and the shared use center 3 used for data collection of the slave station. Information is collected by the data collection unit 43
Obtained from The total number of blocks indicates the total amount of data held by the slave station to be collected, and the current number of received blocks indicates the amount of data that has been received so far. The initial display state of the total number of blocks is, for example, blank, and the initial display state of the current number of received blocks is, for example, zero.

The data collection unit 43 receives an instruction from the control unit 44.
Starts data collection processing for a certain slave station 1
When a data request is transmitted to the slave station 1, the slave station 1 uses the number of blocks indicating the total amount of data transmitted in the current communication as the first data of the communication before transmitting the data of the type instructed to be collected. The information is transmitted to the collection master station device 42. Then, the data is sequentially transmitted in block units.

The total number of blocks transmitted from the slave station 1 is transmitted from the data collection unit 43 to the control unit 44, and the control unit 4
4 displays the transmitted total number of blocks in a column of the total number of blocks of the corresponding slave station 1 on the collection status screen (S
4, S8). Thus, through the collection status screen shown in FIG. 8, the total number of blocks of each slave station 1 is “100”, “20”.
“0”, “50”, and “300” are presented to the operator.

Each time actual data is collected from the slave station 1, the number of received blocks is transmitted from the data collecting unit 43 to the control unit 44, and the control unit 44 collects data based on the transmitted number of received blocks. The number of currently received blocks of the slave station 1 on the status screen is updated (S5, S9). Thereby, the operator can observe the collection status of data from each slave station 1 on the collection status screen shown in FIG. 8 in real time.

Then, the operator monitors the number of currently received blocks, which change every moment, on the collection status screen, and when it is determined that further data reception is unnecessary, for example, the name of a slave station whose communication is to be terminated is determined from the keyboard 47. When the designated communication interruption instruction is input, the control unit 44 instructs the data collection unit 43 to suspend data collection for the designated slave station 1 and suspends data collection (S6, S10). The data collection unit 43 interrupts data transmission by issuing a break instruction to the slave station 1 to which interruption has been instructed, and normally terminates communication regarding the slave station 1 according to the communication procedure of the teleterminal system. In the slave station 1 that has received the break instruction, all untransmitted data is discarded.

The processing shown in FIG. 7 corresponds to the slave station 1 to be collected.
The process ends when the data collection specified in the collection conditions has been completed for all of them (S7). If any communication failure occurs while the data collection unit 43 is executing the communication control sequence for data collection processing, the above-described retry control is performed.

[0046]

As described above, according to the remote data collection master station device in the teleterminal system of the present invention, the following effects can be obtained.

When a communication failure occurs, the reason for the communication failure and the retry control contents corresponding to the current phase of the communication control sequence are determined for each predetermined communication failure reason by a predetermined phase in the communication control sequence. A search is performed from the control matrix holding the retry control contents for each, and retry control is performed according to the searched retry control contents, so that the remote data collection master station apparatus responds to the type of communication failure and the state of the communication control sequence. Appropriate retry control becomes possible. As a result,
Optimal retry control according to the situation can be performed, and the data communication time can be shortened.

The amount of stored data transmitted from the terminal device at the data collection destination prior to the transmission of the stored data is displayed on the screen of the display device, and the received data amount of the subsequently transmitted stored data is displayed on the screen. Since the data is displayed in real time, the operator can confirm the total amount of the received data at the time of starting the data collection and can monitor the amount of the received data during the communication. As a result, the reception of unnecessary data can be stopped by the intervention of the operator, and the data reception time can be shortened, the communication line can be effectively used, and the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a teleterminal system.

FIG. 2 is a block diagram illustrating a configuration example of a slave station.

FIG. 3 is a block diagram illustrating a configuration example of a base station.

FIG. 4 is a block diagram illustrating a configuration example of a shared use center.

FIG. 5 is a block diagram illustrating a configuration example of a user center.

FIG. 6 is a diagram showing an example of the contents of a control matrix.

FIG. 7 is a flowchart illustrating an example of a process of a control unit.

FIG. 8 is a diagram illustrating an example of a collection status screen.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 slave station 2 base station 3 shared use center 4 user center 41 communication control device 42 remote data collection master station device 43 data collection unit 431 retry control means 432 matrix search means 433 control matrix 44 ... Control unit 45 ... File 46 ... CRT 47 ... Keyboard

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Kazuo Nakaoka 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture Inside Osaka Gas Co., Ltd. (72) Noritori Murai Machi-shi, Chuo-ku, Osaka-shi 1-2-2 Osaka Gas Co., Ltd. (72) Inventor Ichiro Sugimoto 4-1-2 Hiranocho, Chuo-ku, Osaka City, Osaka Prefecture (72) Inventor Yoshinori Suyama Yoshinori Suyama Tenjinbashi, Kita-ku, Osaka City 1-19-6 Inside Jericho Network Co., Ltd. (56) References JP-A-57-212516 (JP, A) JP-A-3-17750 (JP, A) JP-A-3-126342 (JP, A)

Claims (3)

(57) [Claims] 1. A plurality of terminal devices serving as slave stations, a base station installed in each wireless zone constituting a service area and communicating with the terminal device in its own wireless zone wirelessly, and connected to the base station by wire. A shared use center, and a user center connected to the shared use center. The shared use center and the base station are installed in the user center in a teleterminal system using a packet communication method as a communication method. A remote data collection master station device that collects data from the terminal device through a control matrix that holds retry control content for each predetermined phase in a communication control sequence for each predetermined communication failure reason; A communication control sequence for collecting data from the terminal device through a usage center and the base station; During communication execution, when a communication failure occurs, a matrix search means for searching the control matrix for the reason for the communication failure and the retry control content corresponding to the current phase of the communication control sequence; and Retry control means for performing retry control in accordance with the searched retry control contents. 2. The remote data in the teleterminal system according to claim 1, wherein some of the retry control contents held in the control matrix include retry control contents indicating that no retry is performed. Collection master station device. 3. An amount of stored data transmitted from a terminal device of a data collection destination prior to transmission of stored data is displayed on a screen of a display device, and a reception amount of stored data transmitted to date until now is displayed. 3. The remote data collection master station device in the teleterminal system according to claim 2, further comprising a control unit for displaying the information on the screen in real time.