JPH0983579A - Detecting/notifying method for busy state of communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an efficient busy state detecting/notifying method of a communication system with satisfactory real-time capability by collectively managing memory blocks. SOLUTION: A memory block management means which collectively manages plural tasks 1-7 processing and controlling information transmitted/received to/from respective communication control parts 1-1, 1-2 and 1-3 and, plural memory blocks 1-6 is provided. The memory block management means is provided with a counter 1-8 counting the number of use times of the memory blocks. When the respective tasks 1-7 occupy and use one of the memory blocks 1-6, the memory block management means increase the number of the counter 1-8 by one and simultaneously transmits busy signals to respective opposite stations through the communication control parts 1-1, 1-2 and 1-3 when the number of the counter 1-8 exceeds a set value. Then, a means is provided for reducing the number of the counter 1-8 by one when the respective tasks 1-7 releases the memory blocks 1-6 and executing busy releasing when the number of the counter 1-8 becomes less than the setting value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a busy state detection notification method in a communication system in which a CPU is used and data is transmitted and received among a plurality of stations.

[0002]

2. Description of the Related Art Conventionally, in a communication system in which a plurality of stations transmit and receive data to and from each other, a plurality of partner stations (mobile stations, base stations, centers, etc.) are supported in the same station. Each communication control unit is provided, and each communication control unit has a memory block (memory), and processes transmission / reception data (mail) with the partner station. Therefore, each communication control unit individually checks the number of memory blocks used at the start of processing, sends a busy signal to the partner station if the usage limit is exceeded and causes the partner station to wait, and releases the busy state if the memory block becomes empty. And continues processing.

[0003]

However, in the above-mentioned conventional method, since the memory block is managed for each communication control unit, the memory block cannot be effectively used and the efficiency is low. In addition, each communication control unit determines whether the number of memory blocks used has exceeded the limit at the start of processing, and transmits a busy signal if the number of used memory blocks exceeds the limit. There was a problem that it was lacking in sex and that the time in a busy state was prolonged.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a busy state detection and notification method for a communication system that is efficient and has good real-time performance by collectively managing memory blocks. And

[0005]

In order to solve the above problems, the present invention has a plurality of communication control units and a plurality of memory blocks, and uses a CPU to transmit and receive data to and from each other between a plurality of stations for processing. In the busy state detection notification method for a communication system that is currently operating, as shown in FIG.
1, 1-2, 1-3), and a memory block management means for collectively managing a plurality of tasks 1-7 and a plurality of memory blocks 1-6 for processing and controlling information transmitted and received. Is a memory block 1-6
A counter 1-8 for counting the number of used memory blocks is provided so that each task 1-7 in the memory block management means is a memory block 1-6.
When occupying and using one of the counters 1-8, if the number of the counters 1-8 is incremented by 1 and the number of the counters 1-8 exceeds the set value, the communication control units (1-1, 1-2, (1-3) send a busy signal to each of the partner stations 2, 3 and 4 all at once, and when each task 1-7 releases the memory block 1-6, the number of counters 1-8 is 1 It is characterized in that a means for canceling the busy state is provided when the number of the counters 1-8 is subtracted and falls below a set value.

In the present invention, a plurality of memory blocks 1-6 are collectively managed as described above, and a set value (for example, 80%) is set.
As described above, since the busy signals are output all at once and the busy state is canceled at other set values (for example, 40%) or less, the memory blocks 1-6 are effectively utilized and the operation efficiency is good as compared with the conventional case. In addition, since the task 1-7 counts the number of use of the memory block 1-6 at the time of using the memory block 1-6 and at the time of releasing the memory block 1-6 and determines whether or not it is in the busy state, the real-time property is high. -It has the effect of shortening the state time and speeding up recovery. The value of 80% for determining the above-mentioned value and 40% for determining the cancellation can be easily changed by setting operation.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a functional configuration of a local station communication system that implements the busy state detection notification method of the present invention. As shown, the (local station) communication system 1 includes a communication control unit 1-1, a communication control unit 1-2, a communication control unit 1-3, a memory block acquisition processing routine 1-4, and a memory block release processing routine. A communication control unit 1-1, a communication control unit 1-2, and a communication control unit 1-3, each of which includes a chin 1-5, a plurality of memory blocks 1-6, a plurality of tasks 1-7, and a counter 1-8. It is connected to the partner station 2, the partner station 3, and the partner station 4, respectively.

Various stations such as mobile stations, base stations, centers, etc. are assumed as the partner stations 2, 3, 4. Multiple tasks 1-7
(A to D) are application tasks including diagnostics, timers, etc., which process received information from the partner stations 2, 3, 4 or transmitted information from the own station. Each task 1-7 and each communication control unit (1-1 to 1-3) share a plurality of memories 1-6. That is, during operation, one of the memory blocks 1-6 is exclusively used to process information, and after completion, it is released and used by another task 1-7.

FIG. 2 shows the memory block acquisition processing routine of FIG.
It is a Chin's flow chart. Each task 1-7 (A ~
D) and each communication control unit (1-1 to 1-3), when processing the information (mail) from each of the partner stations 2, 3, and 4,
It calls the Chin and occupies the required memory blocks 1-6 and is used to process the information (mail). First, one of the vacant memory blocks 1-6 is acquired (step ST21). Next, 1 is added to the counter 1-8 that counts the number of used memory blocks 1-6 (step ST2
2) If the busy flag is not currently set (step ST23) and the number of memory blocks 1-6 used exceeds a certain set value (set value 80%) (step ST24), the busy flag is set. Set the flag (step S
T25), and notifies each partner station 2, 3 and 4 that their own station is in the busy state via each communication control unit (1-1 to 1-3) (step ST26). During the busy state, reception from the partner station is not possible (sending is possible).

FIG. 3 shows the memory block release processing routine of FIG.
It is a Chin's flow chart. First, each task calls this routine when the work is finished, and releases the used memory block 1-6 (step ST31). Then, from the counter that counts the number of used memory blocks 1-6,
Is subtracted (step ST32), the busy flag is set (step ST33), and the number of memory blocks 1-6 used falls below a certain set value (set value 40%) (step ST34), The busy flag is reset (step ST35), and each communication control unit (1-1 to 1-
It notifies the other stations 2, 3 and 4 via 3) that the own station has been released from the busy state (step ST36).

As described above, the present embodiment collectively manages a plurality of memory blocks 1-6, outputs a busy signal all at once with a set value (for example, 80%) or more, and outputs another set value (for example, 4).
Since the busy state is canceled at 0%) or less, the memory blocks 1-6 are effectively utilized and the operation efficiency is good as compared with the conventional case. In addition, since the task 1-7 counts the number of used memory blocks 1-6 at the time of using the memory block 1-6 and at the time of releasing the memory block 1-6 and determines whether or not it is in the busy state, the real-time property is high and the busy state is high. It has the effect of shortening the status time and speeding up recovery. Further, the reference value (80%, 40% in the example) for determining the busy / busy cancellation is a constant whose setting can be changed, and an appropriate value can be set according to the situation.

[0012]

As described above, according to the present invention, the following excellent effects are expected. A plurality of memory blocks are collectively managed, a busy signal is output at a certain value (eg, 80%) or more, and a busy signal is released at a certain value (eg, 40%) or less. It is effectively used and efficient. Further, since the number of used memory blocks is counted at the time when the task uses the memory block and at the time when the memory block is released, it is determined whether or not the task is in the busy state, so that the real-time property is high and the time in the busy state can be shortened.

[Brief description of drawings]

FIG. 1 is a diagram showing a functional configuration of a local station communication system that implements a busy-state detection notification method of a communication system of the present invention.

FIG. 2 is a diagram showing a flow of a memory block acquisition processing routine.

FIG. 3 is a diagram showing a flow of a memory block release processing routine.

[Explanation of symbols]

 1 Local station communication system 1-1 Communication control unit 1-2 Communication control unit 1-3 Communication control unit 1-4 Memory block acquisition processing routine 1-5 Memory block release processing routine 1-6 Memory block 1- 7 tasks 1-8 counter 2 partner station 3 partner station 4 partner station

Claims (1)

[Claims] 1. A method for notifying a busy state of a communication system comprising a plurality of communication control units and a plurality of memory blocks, wherein a CPU is used to transmit and receive data between a plurality of stations and process the data. A plurality of tasks that process and control information transmitted and received from each communication control unit and a memory block management unit that collectively manages the plurality of memory blocks are provided, and the memory block management unit counts the number of used memory blocks. A counter is provided, and when each task occupies and uses one of the memory blocks, the memory block management unit increments the number of the counter by one, and when the number of the counter exceeds a set value, Visible to all other stations all at once via the communication control unit
A communication is provided, which transmits a signal, and further comprises means for decrementing the number of the counter by 1 when each task releases the memory block and canceling the busy when the number of the counter falls below a set value. System busy-state detection notification method.