JPS581586B2 - Mailbox management method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mailbox management system that notifies a mailbox contract terminal of the usage status of the mailbox in mailbox communications.

In a data exchange with a storage function, the network side provides memory to the subscriber, and the subscriber can use the memory to communicate using mailbox communication.The following are typical forms of communication. There are two possibilities.

(1) A mailbox contract terminal writes a message to the mailbox, and an unspecified or specific terminal reads the message.

(2) The mailbox contract terminal receives a message from an unspecified or specific terminal in the mailbox and reads the message.

In particular, in the case of (2), the mailbox contract terminal cannot know the usage status of the contracted mailbox due to the communication format. There was a drawback that I had no choice but to rely on.

In order to solve this drawback, the present invention provides a mailbox management function on the network side, grasps the usage status of the mailbox, and checks the usage rate of the mailbox when writing a message to the mailbox. When the rate exceeds a certain value, a warning message is sent to the mailbox contract terminal, or an inquiry from the mailbox contract terminal is answered, and management information of the mailbox is notified.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the mailbox management system according to the present invention, and FIG. 2 shows a signal sequence in normal mailbox communication.

Normal mailbox writing and reading operations will be specifically described using FIGS. 1 and 2.

When the exchange SSC having the storage function in FIG. 2 receives the mailbox write request signal a from the mailbox write terminal TA, it sends the mailbox write message length in the mailbox write signal to the mailbox management unit 1 in FIG. Sends a comparison request S4 between S3 and the remaining writable size of the mailbox,
The comparison result A1 is obtained.

The mailbox write message length and the remaining mailbox size are compared, for example, as follows.

The comparison circuit 8 compares the output of the difference calculation circuit 7 between the address in the mailbox writable address storage unit 3 and the address in the contract final address storage unit 4, that is, the remaining size, and the mailbox write message length S3,
The result is output to AND gate 9.

The comparison request S4 establishes the AND gate 9 and outputs the comparison result A1.

If this comparison result A1 is not writable, the mailbox writing terminal is notified to that effect, but if it is writable, it sends the writable signal b in FIG. 2 and receives the message C from the terminal TA. After that, write the message to the mailbox.

The mailbox write operation includes a write message M1 and a write request S1 to the mailbox 2 in FIG.
is sent and executed according to the address instruction of the mailbox writable address storage section 3.

When the writing is completed, the writing completion signal d in FIG. 2 is sent to the mailbox writing terminal TA,
The communication ends with a disconnection signal e and a disconnection confirmation signal f.

Ichiriki, the exchange SSC is a mailbox contract terminal TB
When it receives a mailbox read request g from , it checks the status of the designated mailbox, sends a read permission signal h, and sends the message i in the mailbox.

The mailbox reading operation is performed by requesting the mailbox management unit 1 to read the mailbox 2 in FIG.
This is done by sending 2.

Due to this read request S2, the contents of the mailbox are
The addresses are sequentially read from the address in the mailbox contract start address storage section 4 to the address in the mailbox writable address storage section 3, and outputted as a read result M2.

After outputting the contents of the mailbox to the mailbox contract terminal TB, communication is terminated with a disconnection signal j and a disconnection confirmation signal k shown in FIG.

The above are mailbox write and read operations in normal mailbox communication.

However, in these power methods, the mailbox contract terminal TB
However, the disadvantage is that it is not possible to manage the usage status of contract mailboxes.

The present invention further improves the mailbox management function and solves the above drawbacks, and the specific operation will be explained below with reference to FIGS. 1 and 3.

The mailbox write sequence in the signal sequence of FIG. 3, that is, from the write request signal a to the disconnection confirmation signal f, is the same as the normal sequence described above. Is it possible to write received messages to the box?
In addition to the function to compare the length of the received message and the warning message sending value specified by the network or mailbox contract terminal TB, a function is added to compare the length of the received message and the warning message sending value specified by the network or mailbox contract terminal TB. It is characterized by sending a warning message to the mailbox contract terminal.

Specifically, in FIG. 1, the function sends a comparison request S4 between the mailbox write message length S3 and the remaining mailbox writeable size to the mailbox management unit 1 mentioned above, and receives the comparison result A1. The comparison circuit 11 newly compares the write message length S3 with the difference calculation circuit 7.
A function is added that compares the calculated sum with the existing message length of the mailbox 2 and the value of the warning message sending unit 10, and outputs the comparison result A2.

If the comparison result A1 cannot be written or the comparison result A2 exceeds the warning message sending value, the exchange SSC in FIG. Upon reception, a warning message n is sent out, and communication is terminated with a disconnection signal j and a disconnection confirmation signal k.

The warning message is output as a reading result M2 by sending a reading request S6 to the warning message storage section 16 in FIG.

The mailbox contract terminal uses this message as an opportunity to read the messages in the mailbox according to g to k in Figure J2.

Note that 5 is a mailbox 2 and a warning message storage section 16.
6 is a drive unit that drives the warning message storage unit 1.
6 management department.

The above is a function that checks a mailbox when writing to a mailbox and sends a warning message to the mailbox contract terminal if necessary, but the present invention further provides the function of checking the mailbox usage status from the mailbox contract terminal, that is, the mailbox usage status from the mailbox contract terminal. It also provides a function for answering inquiries about box usage rate, number of messages in the mailbox, number of messages stored by terminal, etc. The function for answering inquiries about mailbox usage rate will be explained below as an example.

In FIG. 3, when the switching center SSC receives a mailbox usage rate inquiry request 0 from the mailbox contract terminal TB, it checks the status of the designated mailbox, sends an inquiry enable signal p, and sends a mailbox usage rate inquiry request 0. After transmitting the rate q, the communication is terminated with a disconnection signal j and a disconnection confirmation signal k.

The mailbox usage rate calculation process is shown in Figure 1.
The usage rate calculation circuit 14 calculates the existing message length of the mailbox 2 calculated by the difference calculation circuit 7 and the mailbox size storage unit 13
The mailbox usage rate is calculated from the value of , the AND gate 15 is established based on the usage rate reading request S5, and the result is output as the usage rate A3.

Furthermore, if the function of the warning message storage unit 16 is added to store the message in the mailbox 2 when the written message M1 is received, and also to manage the number of messages written and the number of messages by writing terminal, the warning message storage unit 16 can receive a warning message. These management announcements can also be notified at the time of sending or when inquiring about the usage status from the mailbox contract terminal TB.

As described above, according to the present invention, normal mailbox communication, especially unspecified mailbox communication to a mailbox subscribed to a terminal,
Or, in a form of communication that receives and reads messages from a specific terminal, the terminal provides a function to send a warning message when the mailbox usage rate is exceeded or to inquire about the usage status, as a means for the terminal to know the usage status of the contracted mailbox. It is.

This allows the terminal to read the contracted mailbox in a way that is appropriate for the usage status, improving mailbox usage efficiency, reducing the probability of block encounter when writing to the mailbox, and improving the effectiveness of mailbox communication. It has the advantage of significantly improving

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the mailbox management system according to the present invention, FIG. 2 is a diagram showing a signal sequence in normal mailbox communication, and FIG. 3 is a diagram showing mailbox communication according to an embodiment of the present invention. FIG. 2 is a diagram showing a signal sequence in FIG. 1... Mailbox management unit, 2... Mailbox, 3... Mailbox writable address storage unit, 4... Contract final address storage unit, 5. . . . Drive unit that drives the mailbox and warning message storage unit, 6 . . . Management unit for the warning message storage unit, 7 . . . Difference calculation circuit, 8.
... Comparison circuit, 9, 12, 15 ... AND gate, 10 ... Warning message sending section, 11.
...Warning message sending value comparison circuit, 13...
... Mailbox size storage section, 14 ... Usage rate calculation circuit, 16 ... Warning message storage section,
SSC... Exchange, TA... Mailbox writing terminal, TB... Mailbox contract terminal, At, A2... Comparison result, A3...
...Usage rate, M1...Written message, M2...
・Reading result, S1...Writing request, S2
... Read request, S3 ... Mailbox write message length, S4 ... Mailbox write message length, request to compare S3 with the remaining mailbox writable size, S5 ...Usage rate read request, S6...Read request, a...
...Mailbox write request signal, b...
Writable signal, C...Telegram from terminal TA,
d...Writing completion signal, e...Disconnection signal, f...Disconnection confirmation signal, g...Mailbox read request, h......・Readable signal, i... Telegram in mailbox, j...
...Disconnection signal, k...Disconnection confirmation signal, l.
...Call signal, m...Response signal, n.
...Warning message, 0...Mailbox usage rate inquiry request, p...Inquiry possible signal, q...Mailbox usage rate.

Claims (1)

[Scope of Claims] 1. A data exchange network having a storage function, in which the memory owned by the network is provided to subscribers, and the memory is used to communicate with each other. By managing the memory contract and the size of the message written by the calling subscriber on the network side, the usage status of the memory can be monitored, and if the usage rate exceeds a certain value, the network side can automatically send A mailbox management system characterized by calling up the memory contract subscriber terminal and sending out a warning message. 2. In a data exchange network with a storage function, the contracted amount of memory lent to subscribers in the mailbox communication system, in which the memory owned by the network is provided to subscribers and the subscribers communicate with each other using the memory; By managing the size of the message written by the calling subscriber, the calling subscriber number, the number of written messages, etc. on the network side, the memory can be checked when the warning message is sent or when the memory contract subscriber makes an inquiry. A mailbox management system characterized in that management information regarding the usage status is notified from the network side to the memory contract subscriber terminal.