JPH08149547A - Method for confirming existing zone of radio equipment and radio system - Google Patents

Abstract

PURPOSE: To confirm a existing zone of a radio equipment to one location by allowing radio equipments in a zone to receive any of frequencies of plural radio stations and restoring the state to an initial state in a reception discrimination flow chart after identification data are sent after the reception. CONSTITUTION: Let number of radio stations are 4, the transmission frequencies be A-D for each, then in the case of reception of identification data α, one period from the step S1 to the step S4 is selected shorter than a calling time of each radio station or longer the calling time of all the radio stations to reduce disable reception for a radio equipment. Before a radio equipment enters a premises from the outside, the radio equipment repeats discrimination of NO from the step S1 to the step S4. After the radio equipment enters the premises, the radio equipment sends a identification data of the radio equipment and the step is restored to the step S1 and when the discrimination is YES in any step among the steps S1-S4, the received frequency and identification code of the radio equipment are sent and the step is restored to the step S1. The processing above is repeated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses wireless transmitters and receivers to determine the existence areas of vehicles and individuals in large factories, hospitals, and exhibition halls, and to enable people to monitor them if necessary. Wireless communication system.

[0002]

2. Description of the Related Art The outline of the system relating to the present invention is as follows. A wireless device that moves in a large premises exists when multiple stationary wireless stations intermittently emit it, and when it receives radio waves of different frequencies that do not emit at the same time, it transmits the received frequency and its own identification data. The wireless station was informed, and the information was collected in a single determining device to determine the existence area of each wireless device on the premises.

Details will be described with reference to FIG. Radios of 13α to 13η are present in a certain range on the premises not shown in the whole. The wireless station 12a transmits a wireless frequency A that can be received by the wireless device within the range of the dotted line. Radio that received this radio wave
13α, 13β, and 13η transmit identification data for each frequency A and radio, for example, 13α transmits α to inform only the radio station 12a of its existence. Within the transmission range of this wireless station 12a, the wireless device 13α
The information that 13β and 13η are present is transmitted to the determinator 11. Next, the wireless station 12b installed at another position transmits the wireless frequency B, and similarly, the existence of five units within this range is transmitted to the finalizing device 11, and all wireless stations repeat this process. Then, the finalizer confirmed the latest existence area for each radio.

A case where two wireless stations are installed on the premises will be briefly described with reference to FIG. In the premises 15, a radio station 12a having a transmission frequency A and a radio station 12b having a transmission frequency B are installed. The range in which the wireless device can respond to the transmission frequency is a receivable area 15a having only the transmission frequency A, a receivable area 15b having only the transmission frequency B, and a receivable area 16 having the transmission frequencies A and B (hereinafter abbreviated as area). ), The existence area of each wireless device is determined without recognizing the two areas 17 that cannot be received.

In this case, as shown in the flow chart of reception of the radio whose identification data is α as shown in FIG. 4, if the frequency A is received in step S11, the reception frequency A and the identification data α are sent in step S15 to transmit the frequency A. If the presence of α is transmitted to the transmitting wireless station and the frequency B is received in the next step S12, the presence of α is transmitted to the wireless station transmitting the frequency B by transmitting B and α in step S16, and if the frequency B is not received, Step S11
And kept circulating S12.

[0006]

In the prior art, if there is a wireless device in the area 17 of FIG. 3, the wireless device cannot receive the transmission frequency and the response cannot be made, so that it cannot be determined. The wireless device 13 η shown in FIG. 2 corresponds to the existence of the area 16 in FIG. 3, and the areas 15 a and 15 b are set as the existing areas each time the wireless station transmits the identification data to the confirming device 11. , It was hard to tell if it was in the center of the campus or the device was faulty.

An object of the present invention is to provide a method and this system which can always determine the existence area of a wireless device in a premises.

[0008]

SUMMARY OF THE INVENTION The present invention provides a plurality of stationary radios that are moved within a premises and identify them by the response of the radios within the receivable range to the natural frequencies that are intermittently transmitted. In a method of determining the existence range of a radio by a radio station and a determinator that receives information of these radio stations, the plurality of radio stations are configured to output signals of different natural frequencies, and the radio has at least one It is arranged so that it can receive two frequencies, and the radio compares the received frequency with the natural frequency of each radio station in a predetermined order, and if they match, transmits that frequency and its own identification data. To the beginning of the comparison order that was previously set,
This is a method of updating the existence area of a wireless device obtained from a wireless station at regular intervals.

[0009] Then, a radio that is moved within the premises, a plurality of fixed radio stations that identify it by the response of the radio within the receivable range to the natural frequency that is intermittently transmitted, and these radio stations In a wireless system including a determinator that determines the existence range of a wireless device by receiving information of a transmitter, a transmitter that emits a natural frequency that represents its own station, a receiver that can receive transmission information from the transceiver, and a determinator. And a plurality of radio stations in which the radio is arranged to be able to receive at least one frequency, and a natural frequency of each radio station in a predetermined order of the received frequencies. A wireless device including a scanning reception unit that compares and returns to the beginning of the comparison order when they match, a transmission unit that transmits the matching natural frequency and identification data of the own device, and identification data of the wireless device obtained from a wireless station Based on In which confirmation equipped with a determination unit for determining the presence area of the machine there.

[0010]

According to the present invention, even if the radio can receive the frequency of the radio wave of any one of the radio stations anywhere in the premises and can receive the transmission frequencies of the plurality of radio stations, it is predetermined. The presence or absence of reception is determined in accordance with the order of the wireless stations, and if received, the identification data is wirelessly transmitted to the originating wireless station, and then it returns to the reception determination of the first wireless station that was set in advance, so the existence area is always determined. Can be in one place.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a receiving method of a wireless device in which there are four wireless stations, each of which has a transmission frequency of A, B, C, and D and whose identification data is α. In this case, the wireless device can receive one or more transmission frequencies anywhere on the premises, and shortens the time when there is no transmission by the wireless station, and one cycle from step S1 to step S4 is longer than the transmission time of each wireless station. Shorten or make it longer than the transmission cycle of all wireless stations to reduce the unreceivability when the wireless device should receive. Before the wireless device enters the premises from the outside, the wireless device repeats the determination of NO from step S1 to step S4. Then, the first received frequency and the identification data of the wireless device are transmitted to the site, and the process returns to step S1. If the determination is YES in any of steps S1 to S4, the received frequency and wireless After transmitting the machine identification code, step S1
Repeat returning to.

As a matter of course, there is no problem even if the radio stations whose radio coverage areas do not overlap are transmitted at the same time.

[0013]

According to the present invention, any one of the frequencies of a plurality of wireless stations can be received by the wireless device on the entire premises, and when the wireless device receives the identification data, the identification data is transmitted and the reception determination flowchart is shown. Since it is returned to the beginning, it is possible to provide a method and system capable of stably determining the existence area of the wireless device in one place and monitoring objects and people moving in a wide area.

[Brief description of drawings]

FIG. 1 is a flow chart of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of the configuration of this system.

FIG. 3 is a diagram of a reception state on the premises of a conventional example.

FIG. 4 is a reception flow chart of a conventional wireless device.

[Explanation of symbols]

11 Determining device 12a Radio station with natural frequency A 13α Radio device with identification data α 15a Receivable area only with transmission frequency A S1 Reception determination first step of radio device with identification data α S6 Radio device with identification data α Steps to convey A reception

Claims (2)

[Claims] 1. A radio moving on a premises, and a plurality of fixed radio stations for identifying the radio by a response of the radio within a receivable range to a natural frequency which is intermittently transmitted.
In the method of determining the existence range of a radio by a determinator that receives information from these radio stations, a plurality of radio stations are configured to output signals of different natural frequencies, and the radio receives at least one frequency. If possible, the radio compares the received frequency with the natural frequency of each radio station in a predetermined order, and if they match, transmits that frequency and its own identification data before The method for determining the existence range of a wireless device is characterized in that the determining device is returned to the beginning of the comparison order specified above, and the determining device updates the existence region of the wireless device obtained from the wireless station at regular intervals. 2. A wireless device that is moved on a premises, and a plurality of stationary wireless stations that identify it by the response of the wireless device within the receivable range to a natural frequency that is emitted intermittently.
In a wireless system consisting of a determinator that receives the information of these wireless stations and determines the existence area of the wireless device, a transmitting unit that emits a natural frequency that represents the local station and a receiving unit that can receive the transmission information from the wireless device. And a plurality of radio stations each of which is provided with a transmission unit that transmits this information to the deterministic device, and the radio device is arranged to receive at least one frequency, and each radio station in a predetermined order of the received frequency. Of the wireless receiver provided with the scanning receiving unit that compares the natural frequency of the device and returns to the beginning of the comparison order when they match, a transmitter that transmits the matching natural frequency and the identification data of the own device, and a radio obtained from the wireless station. A wireless system comprising a determinator having a determinator that determines the existence area of a wireless device based on identification data of the device.