JPH05344036A - Simultaneous command reply collection system - Google Patents

Abstract

PURPOSE:To collect a correct order of a reply station signal by generating a clock pulse of the same period as a polling period synchronously with polling and a clock pulse synchronously with the first polling signal and using a period for circulation of polling as a period and using the clock pulses as the reference pulses. CONSTITUTION:A reply signal 6 is received sequentially in time division by a channel section 1, the sequence is discriminated and the result is sent to a system control section 2. In this case, two kinds of clock pulses are sent to the channel section 1 from the system control section 2. The one pulse is generated synchronously with polling and has a same period as the polling as an A clock 4 and the other pulse is a B clock 5 synchronously with the initial polling whose period is equal to a period between the first polling and the last polling. That is, The reply sequence is normally recognized by the A clock 4 and the count of reply sequence is initialized by using the B clock 5. Thus, no discrepancy relating to a reply station between channels is caused.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of collecting terminal station responses to a simultaneous command notification in a wireless system.

[0002]

2. Description of the Related Art Conventionally, when the response signals of the terminal stations to the simultaneous command notification are sequentially received by time division, the terminal stations are indexed according to the order. That is, the order is determined by counting the obtained response signals. In this case, the correct order may not be obtained due to missing response signals.

[0003]

In the above-mentioned conventional method,
If the number of responding stations is small and the collection time is long, no problem will occur. However, if the number of responding stations is large and the collection time is short, such as when polling multiple channels at the same time, it is easy to make an error in determining the responding stations There's a problem. It is an object of the present invention to solve these problems so that the correct sequence of responder signals can be recognized and collected.

[0004]

In order to achieve the above object, the present invention generates two kinds of clock pulses synchronized with polling. One is in synchronization with polling and the cycle is the same as the polling cycle. The other is in synchronization with the first polling and the cycle is the first and last polling intervals, that is, the period in which the polling completes one cycle. The former clock pulse is a reference pulse for correctly recognizing the order of the response signals in the group designated for polling, and the latter is a reference pulse for notifying the start of polling and notifying the initialization of the sequence counting.

[0005]

By generating these two kinds of clock pulses, the terminal station can be normally indexed to the response signal even when the number of response stations is large and the collection time is short.

[0006]

EXAMPLE This operation will be described below with reference to FIGS. FIG. 1 is a block diagram for explaining the present invention, and FIG. 2 is a time chart of a polling signal and two clock signals. The response signal 6 is sequentially received by the channel unit 1 in a time division manner. The order of the response signal is determined by the channel unit 1, converted into a fixed format, and transmitted to the system control unit 2. The transmission lines of the channel unit 1 and the system control unit 2 are wired. In this case, two types of clock pulses are directly supplied from the system control unit 2 to the channel unit 1. One occurs in synchronization with the polling commanded by the system control unit, the cycle is equal to the polling and polling period A clock 4, and the other is in synchronization with the first polling and the cycle is the first polling and the last polling. B clock 5 equal to the period.

Polling signal 3 by A clock 4
The order of responses within the group specified by can be recognized normally. Also, the counting of the response order is initialized by the B clock 5. Both the A and B clocks are supplied to all channel parts. This is because the channel of the response signal that collects the response to the simultaneous command moves each time, and the response is received using two channels. In this case, the recognition of both responding stations does not contradict due to the difference in processing time between channels.

[0008]

According to the present invention, the number of response collecting stations can be increased.
The collection time can be compressed. In addition, when the number of response signal reception channels is increased, no contradiction occurs regarding the response station between channels.

[Brief description of drawings]

FIG. 1 is a block diagram showing the present invention.

FIG. 2 is a time chart of clock pulses.

[Explanation of symbols]

 1 channel section 2 system control section 3 polling signal 4 station order determination reference clock (A clock) 5 polling start reference clock (B clock) 6 response signal

Claims (1)

[Claims] 1. A response collecting method for collecting response signals sequentially transmitted in a time division manner from terminal stations belonging to a group designated by polling, in a polling period, a clock pulse having the same period as a polling period, and a first polling. Synchronous command characterized by generating a clock pulse which is synchronized with the signal and whose period is one cycle of polling, and recognizes and collects the order of response signals without error based on these two types of clock pulses. Response collection method.