JPH04322347A - Information transmission system - Google Patents

Abstract

PURPOSE:To prevent omission of taking-in of information by efficiently taking in information on the reception side. CONSTITUTION:A transmission side (second information gathering part) transmits m-bit change presence/absence information A before period information. Respective bits A1 to Am of this information A indicate the presence or the absence of the change of contents of groups B1 to Bm, which are obtained by dividing period information into m by n bits, from preceding those as '1' or '0'. The reception side takes in only contents of changed groups, namely, groups corresponding to bits '1' out of bits A1 to Am of change presence/absence information A in accordance with change presence/absence information A.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to an information transmission method for exchanging information between microprocessors in a computer, for example, and in particular, the present invention relates to an information transmission system for exchanging information between microprocessors in a computer. It pertains to the transmission of information by directional transmission.

0002

2. Description of the Related Art FIG. 4 is a functional block diagram showing an example of the configuration of a control device in a communication terminal device. In the figure, 1 to 6
is the first information gathering section. The first information collecting units 1 to 6 collect predetermined information transmitted through parallel transmission paths, such as alarm information from monitoring circuits provided in each part of the communication terminal equipment and setting information from setting switches. conduct. The first information collecting units 1 to 6 then collect the collected information in a second manner at a predetermined period.
Information collection units 7 and 8 (the first information collection units 1 to 3 are the second information collection unit 7, and the first information collection units 4 to 6 are the second information collection unit 8)
) respectively. The second information collection units 7 and 8 collect information output from corresponding ones of the first information collection units 1 to 6, respectively. The second information collecting units 7 and 8 are
The collected information is transmitted to the main control unit 9 at predetermined intervals.

The main control section 9 transmits the collected information to a man-machine interface (MMI) control section 10, output control sections 11 and 12, an interface section 13, or an external console 14 as necessary. The MMI control unit 10 is an MM controller composed of, for example, a key, an LCD, and an LED.
Controls I15. The output control units 11 and 12 output the information given from the main control unit 9 to other parts within the communication terminal device via the parallel transmission path. The interface unit 13 provides an interface with other systems such as a standby device. It should be noted that each of the above units is configured by, for example, a microprocessor.

Now, an example of the operation of the control device having the above configuration is as follows. For example, when an operation is performed using the keys of the MMI 5 to request information display, this is recognized by the MMI control unit 10 and the request is output to the main control unit. In response, the main control unit 9 provides the MMI control unit 10 with necessary information among the information collected via the first information collection units 1 to 6 and the second information collection units 7 and 8. The MMI control section 10 controls the display on the MMI 15 based on information given from the main control section 9.

By the way, information is transmitted from each section to the main control section 9 by assigning information to each bit of periodic information of a predetermined number of bits and periodically transmitting this periodic information. The main control unit 9 then takes in the information that is periodically transmitted in this manner.

However, there are multiple inputs to the main control unit 9 (see FIG.
In the example shown in Fig. 7, there are seven), and the information transfer period is short, for example, from several ms to several seconds, so there is a risk that the main control unit 9 may fail to receive information.

[0007]

As described above, conventionally, when information is transmitted by assigning information to each bit of periodic information of a predetermined number of bits and periodically transmitting this periodic information, the receiving side Since all of the periodically transmitted information is trying to be captured in this way, there is a risk that the processing will not be able to catch up and some data will be missed.

[0008] The present invention has been made in consideration of the above circumstances, and its purpose is to provide information transmission in which information can be efficiently taken in on the receiving side and information can be prevented from being lost. The goal is to provide a method.

[0009]

[Means for Solving the Problems] The first invention is such that the transmitting side divides periodic information into m (an integer of 1 or more) groups, adds m-bit change information to the periodic information, and Information indicating the presence or absence of a change with respect to the previously transmitted information is assigned to the contents of the m groups in each bit of the presence/absence information, and the receiving side receives information on groups in which there is a change with respect to the previously transmitted information based on the change presence/absence information. I made it so that it only imports.

[0010] In addition to the first invention, a second invention provides that when the information assigned to each bit of the periodic information has not changed at all with respect to the previously transmitted information, on the transmitting side, the change is detected. Only the cycle information is transmitted without adding the presence/absence information, and the receiving side only takes in the cycle information to which the change/presence information is added.

[0011]

[Operation] According to the first invention, on the transmitting side, each bit is
m-bit change information indicating the presence or absence of changes in the contents of each group with respect to the previous contents is added, and on the receiving side only information of groups whose contents have changed is taken in based on the change presence information. Therefore, information whose contents do not change is not captured, and the amount of information to be captured is reduced.

According to the second aspect of the present invention, on the transmitting side, if the content of the periodic information has not changed at all with respect to the content transmitted last time, the change presence information is not added, and on the receiving side, Only the cycle information to which the change presence/absence information is added is captured. Therefore, period information and change information that have not changed at all with respect to the previously transmitted content are not captured, and the amount of information to be captured is reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an information transmission format in the information transmission method according to this embodiment.

The present embodiment is characterized in that, as shown in FIG. 1, change presence/absence information A is transmitted prior to period information. Here, the change presence/absence information A is a predetermined number of bits (m bits), and each bit indicates the presence or absence of a change in the contents of each group B1, B2..., Bm, which is obtained by dividing period information into m pieces of n bits each. . Here, the presence or absence of a change means whether there is a difference between the content of the information sent last time and the content of the information sent this time. Hereinafter, the above information transmission format will be specifically explained by applying it to information transmission from the second information collection section 7 to the main control section 9 of the system shown in FIG.

First, as shown in FIG. 2, the second information collecting unit 7 on the transmitting side compares the cycle information to be transmitted next with the cycle information transmitted last time, and sets the cycle information to be transmitted next to the cycle information transmitted last time. It is determined whether there is any change in the transmitted cycle information. If there is a change in the cycle information, the process moves from step 2a to step 2b, and the variable X is set to "1" (initial setting).

Next, in step 2c, the second information collecting unit 7 determines whether or not there is a change in the contents of the Xth group of periodic information with respect to the previously transmitted contents, and if there is a change, it is determined in step 2d whether or not there is a change. The Xth bit of information A is set to "1". After this, in step 2e, the variable
After incrementing by "1", steps 2c to 2f are repeated until the variable X becomes m or more.

When the variable X becomes equal to or greater than m, the process moves from step 2f to step 2g. Step 2
In g, the second information collection unit 7 adds the change presence information A created by repeating steps 2c to 2f (sent prior to transmitting the periodic information), and sends the periodic information to the main control unit 9. Send.

Further, if there is no change in the cycle information in the comparison in step 2a, the second information collection unit 7 moves the process from step 2a to step 2h, and does not add the change presence information A in step 2h. Only the cycle information is transmitted to the main control section 9.

On the other hand, as shown in FIG.
It is determined whether or not change presence information A is added to the periodic information sent from and arrived at. If the change presence information A is added, the process moves from step 3a to step 3b, and the variable X is set to "1" (initial setting).

Next, in step 3c, the main control unit 9 determines whether or not the Xth bit of the change presence/absence information A is "1", and only when it is "1", in step 3b, the period information is Import the contents of the Xth group. After this, in step 3e, the variable X is incremented by "1", and then step 3
Repeat steps c to 3f. Then, when the variable X becomes m or more, the current periodic information acquisition process ends.

[0021] Furthermore, if the change presence/absence information A is not added to the cycle information, the main control unit 9 executes the process in step 3a.
From this point on, the current cycle information acquisition process is immediately terminated. In other words, the current cycle information is not captured.

As described above, according to this embodiment, the main control unit 9 imports only the information of the group that is determined to have changed based on the change presence information A of the period information, and does not import the information of the group that does not change. Therefore, the amount of information to be captured is reduced. That is, the time required to import information is also reduced, allowing more time for processing. Therefore, it is possible to prevent information from being omitted.

Further, in the above embodiment, the second information collecting section 7 does not add the change presence information A when there is no change in the entire cycle information from the previous time, and the main control section 9 adds the change presence information A in this way. By not taking in periodic information that has not been added, the process of taking in the change presence information A can also be deleted, and processing efficiency can be further improved.

Note that the present invention is not limited to the above embodiments. For example, in the above embodiment, the cycle information is divided into a plurality of groups, but the whole cycle information may be made into one group, and 1-bit change information may be added. Further, in the above embodiment, each group is divided into the same number of bits (n bits), but the size of each group may be variable length if it is predefined in the system.

Furthermore, in the above embodiment, if the current cycle information has not changed at all from the previous cycle information, no change information is added, but in this case as well, change presence information is not added. Also good.

Furthermore, in the above embodiment, the information transmission method of the present invention was applied to information transmission from the second information collection section 7 in the control device in the communication terminal equipment to the main control section 9.
The present invention can be applied to information transmission in other parts of the same system, and can also be applied to systems other than the control device in the communication terminal equipment. In addition, various modifications can be made without departing from the gist of the present invention.

[0027]

[Effects of the Invention] The first invention provides periodic information on the transmitting side.
(an integer greater than or equal to 1) groups, and m bits of change presence/absence information are added to the periodic information, and each bit of this change presence/absence information indicates whether or not the contents of the m groups have changed from the previously transmitted information. Assign information indicating
On the receiving side, based on the change information, only the information of the group that has changed from the previously transmitted information is taken in.

[0028] In addition to the first invention, the second invention provides that when the information assigned to each bit of the periodic information has not changed at all with respect to the previously transmitted information, on the transmitting side, the change is detected. Only the cycle information is transmitted without adding the presence/absence information, and the receiving side only takes in the cycle information to which the change/presence information is added. These provide an information transmission system that allows information to be efficiently captured on the receiving side and prevents information from being missed.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an information transmission format in an information transmission method according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure related to information transmission on the transmission side (second information collection unit 7).

FIG. 3 is a flowchart showing a processing procedure related to information reception on the receiving side (main control unit 9).

FIG. 4 is a diagram illustrating the prior art.

[Explanation of symbols]

A... Change presence/absence information, A1-Am... Bits indicating presence/absence of change in each group, B1-Bm... Groups in which cycle information is divided into n bits.

Claims (2)

[Claims] 1. In an information transmission method in which information is transmitted by allocating information to each bit of periodic information of a predetermined number of bits and periodically transmitting this periodic information, on the transmitting side, the periodic information is (an integer greater than or equal to 1) groups, and m bits of change presence/absence information are added to the periodic information, and each bit of this change presence/absence information indicates whether or not the contents of the m groups have changed from the previously transmitted information. An information transmission method characterized in that the receiving side receives only information of a group in which there is a change with respect to the previously transmitted information based on the change presence/absence information. [Claim 2] On the transmitting side, if the information assigned to each bit of the periodic information has not changed at all with respect to the previously transmitted information, the transmitting side transmits only the periodic information without adding change information. 2. The information transmission system according to claim 1, wherein the receiving side captures only periodic information to which change information is added.