JP2002112355A - Receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receiver by which a user of a radio system can decide a desired communication range by each wireless system in use and the reliability of the operation of the radio system can be enhanced by receiving the communication from only a transmitter having a registered ID. SOLUTION: The receiver in the specified small power radio system is characterized in the provision of a demodulation section that demodulates a signal, a reception strength output section that outputs the reception strength of the signal, a signal processing section that discriminates whether or not the communication range is within a prescribed communication range, and a 1st storage section that stores a reception strength level acting like a reference to discriminate the communication range and registers an ID of a transmitter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving apparatus for improving communication reliability in a specified low power wireless system.

[0002]

2. Description of the Related Art In a specific low power radio system, a radio system is established in which communication is established using a transmitter for transmitting a signal and a receiver capable of reducing reception sensitivity with an attenuator having a constant attenuation. There are systems that limit the communication range.

However, when the communication range is limited using the above-described system, the communication range depends on the amount of attenuation set in advance for each receiver, and the communication range of the system becomes a fixed fixed range. It cannot be adapted to the desired communication range of the user of the wireless system, including the difference in environment due to the respective installation locations where the system is used. As a result, the wireless system may be accessed from outside the desired communication range, and communication unrelated to the intention of the user of the wireless system may be performed.

[0004] This is because, when operating a wireless system, a receiver receives undesired communication, and even if the communication is within a desired communication range, the receiver receives a signal from a transmitter other than the transmitter with which communication is desired. As for access, there is a problem that communication unrelated to the intention of the user of the wireless system is performed.

[0005] With this, for example, when a receiver receives a signal from a transmitter and outputs a signal to a control unit to drive a shutter, a user of the wireless system as described above is considered. If the communication is performed irrespective of the intention of the wireless system, there is a possibility of harm to human beings, which is a problem related to the reliability of the wireless system.

[0006] Also, which transmitter has been accessed,
The fact that the operation has not been performed is not recorded or displayed, so that a problem in operating the wireless system cannot be clarified.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above points, and it is desired that a user of a wireless system determines a desired communication range for each wireless system to be used. It is possible to increase the operational reliability of the wireless system by accepting only communication from a transmitter having a registered ID from within the communication range and recording and displaying access to the receiving device. An object is to provide a receiving device.

[0008]

To achieve the above object, a receiving apparatus according to the present invention has the following arrangement. That is, according to the first aspect of the present invention, in the receiving device in the specified low power wireless system, a demodulation unit for demodulating a signal, a reception intensity output unit for outputting a reception intensity of the signal, and a predetermined communication range are determined. It is characterized by comprising a signal processing unit and a first holding unit that holds a reception intensity level serving as a reference for determining a communication range and registers an ID of a transmitter.

[0009] The invention according to claim 2 is characterized in that a second holding unit capable of recording an access history of the transmitter from outside the communication range is provided.

[0010] The invention according to claim 3 is characterized in that a display unit capable of displaying an access history from outside the communication range is provided.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a receiving apparatus according to the present invention will be described with reference to FIGS. 1, 4, 5, 6, and 7, and a second embodiment will be described with reference to FIG. The third embodiment will be described with reference to FIGS. 3 and 9 using FIGS.

(First Embodiment) The first embodiment of the present invention
The receiver according to the embodiment of the present invention can perform ID registration and determination of a desired communication range, and communicates only with a transmitter having an ID registered in the wireless system during operation of the wireless system. Only access from within a desired communication range is accepted.

As shown in FIG. 1, in the present embodiment, a demodulation unit 1 for demodulating a signal from a transmitter, a reception intensity output unit 2 for outputting a reception intensity of a reception signal, and a reception signal The signal processing unit 3 includes a signal processing unit 3 that determines that the communication is within the range, and a first storage unit 4 that holds a reception intensity level serving as a reference for determining that the communication is within the desired communication range. Things.

The desired communication range is set by causing a certain transmitter to transmit a signal from the boundary of the desired communication range to the receiver, and storing the reception intensity level of the signal received by the receiver at that time in the holding unit 4 as a reference. It is to let.

Here, a flow of setting a desired communication range will be described. As shown in the flowchart of FIG. 4, the receiver is set to the area setting mode (step S11), and a signal is transmitted from the transmitter at the boundary of the desired communication range (step S1).
2) causing the receiver to receive the signal (step S1)
3).

Here, when the receiver cannot receive the signal, it means that the transmitter and the receiver are far from each other in a range where the signal of the wireless system does not reach. Then, the wireless system is moved to a distance where the signal reaches (step S14).

If the receiver can receive the data, the data from the demodulation unit 1 is processed by the signal processing unit 3 (step S15).
The signal level from the reception intensity output unit 2 is held in the holding unit 4 as a reference for determining whether the communication is within the desired communication range (step S16).

Next, ID registration for registering the transmitter as a component of the wireless system will be described. FIG.
As shown in the flowchart, the ID registration mode is set (step S21), the transmitter transmits a signal (step S22), and the receiver receives the signal (step S23). If the receiver can receive the signal, the demodulation unit 1
(Step S25), and registers the transmitter as a component of the wireless system (step S25).
26). However, when the receiver fails to receive the signal, it means that the distance between the receiver and the transmitter in the wireless system is too long. Therefore, the distance of the wireless system is changed (step S24), and the wireless system is moved to a communicable distance. Let it.

The above is the description of the operation in the ID registration mode for registering the ID of the transmitter in the receiver and the area setting mode for setting the desired communication range in the wireless system.

Further, as shown in FIG. 6, instead of the ID registration mode and the area setting mode, by providing an initial setting mode for simultaneously performing ID registration and area setting, the ID
(Step S36), and a signal level serving as a reference of a desired communication range for the transmitter having the ID can be registered (step S37). As a result, it is possible to set a desired communication range for each transmitter having a different ID, and it is possible to perform flexible communication for each transmitter while ensuring reliability in a wireless system.

Next, the operation when the receiver receives a signal from the transmitter during normal operation will be described.

As shown in the flowchart of FIG. 7, when the radio system is operated, a standby state (step S40)
When the receiver receives the signal from the transmitter (step S41), it processes the data from the demodulation unit 1 (step S42), and the transmitter receives the ID registered in the wireless system.
(Step S4)
3). If the communication is from a transmitter having an unregistered ID, the process returns to the standby state (step S4).
0). However, if the communication is from a transmitter having a registered ID, the signal level is obtained from the reception intensity output unit 2 (step S44).

The reception intensity level as a reference held in the holding unit 4 is compared with the reception intensity level received from the reception intensity output unit 2 (step S45), and the reception intensity level received just now is stored in the holding unit. If the reference is lower than the reference of No. 4, the command is not executed assuming that the communication is from outside the desired communication range (step S47).

On the other hand, if the reception intensity level of the signal just received is higher than the reference of the holding unit 4, the command is executed as an access from within the desired communication range (step S46).

As described above, the communication range is determined by the user of the wireless system, and the ID of the transmitter is registered in the receiver. Since access from outside the communication range is not accepted, the reliability as a wireless system can be improved. (Second Embodiment) A second embodiment of the present invention is as follows.
When the transmitter outside the desired communication range accesses the receiver, the ID of the transmitter, the time of reception, etc.
Is held in the holding section 6.

As shown in FIG. 2, the second holding section 6 is provided separately from the first holding section 4. However, the second holding section 6 may be the first holding section 4 in the first embodiment. Good. When separately provided, the holding unit 6 storing the access data to the receiver is detached from the receiver, and for example, there is a feature that data analysis in another information processing terminal can be facilitated.

The operation of the receiver according to the present embodiment will be described. Note that, in the flowchart of FIG. 8, steps S40 to S47 surrounded by a dotted line are the same steps as those in the first embodiment, and a description thereof will be omitted.

Here, when the command from the transmitter outside the desired communication range is not executed (step S47), in the present embodiment, the ID of the transmitter which transmitted the signal, the reception time, and the like are stored in the holding unit 6. It is stored (step S48).

According to the present embodiment, it is possible to know which transmitter with which ID has accessed from outside the desired communication range and when. (Third Embodiment) A receiving apparatus according to a third embodiment of the present invention includes a display unit 5 for displaying access to a receiver from outside a desired communication range.

In the present embodiment, since the display unit 5 shown in FIG. 3 is provided, it is possible to immediately determine an access to the transmitter from outside the communication range, an erroneous operation, and the like.

Next, the receiving operation of the receiver will be described. FIG.
As shown in the flowchart of FIG. 7, the reception operation of the present embodiment is performed in steps S40 to S4 surrounded by a dotted line.
8, steps S40 to S47 are the same as the operations of the first embodiment, and step S4
Step S48 following step 7 is the same as the operation of the second embodiment, and therefore will not be described.

The ID and reception time of the transmitter that has performed communication from outside the desired communication range are stored in the storage unit 6 (step S4).
8) After that, in the present embodiment, the ID, reception time, and the like of the transmitter that has performed communication from outside the desired communication range are displayed (step S49).

If it is not necessary to hold the transmitter ID, reception time, and the like, step S48 of holding the transmitter ID, reception time, and the like in the holding unit 6 can be omitted.

[0034]

According to the present invention, a user of a wireless system determines a desired communication range, thereby accepting only access from within the desired communication range and registering an access from within the desired communication range in the receiver. By communicating only with the transmitter that has been used, it is possible to deal with the problem of the reliability of the wireless system in which the wireless system is used carelessly. Thus, it is possible to avoid a problem that a human being is harmed by, for example, a shutter driven by using the wireless system.

Further, the cause of an erroneous operation or the like can be determined by reading out from the data in the holding section or displaying on the display section that the access has been made from outside the desired communication range, so that the user of the wireless system is alerted. It is possible to do.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a flowchart showing an area setting mode information processing routine of the receiving device according to the present invention.

FIG. 5 is a flowchart showing an ID registration mode information processing routine of the receiving apparatus according to the present invention.

FIG. 6 is a flowchart illustrating an initialization mode information processing routine of the receiver according to the present invention.

FIG. 7 is a flowchart illustrating a reception signal processing routine of the reception device according to the first embodiment of the present invention.

FIG. 8 is a flowchart illustrating a reception signal processing routine of the reception device according to the second embodiment of the present invention.

FIG. 9 is a flowchart illustrating a reception signal processing routine of the reception device according to the third embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 demodulation unit 2 reception intensity output unit 3 signal processing unit 4 first holding unit 5 display unit 6 second holding unit

Continued on the front page (72) Inventor Kazuhisa Yoshiki 1048 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Works, Ltd. 5K048 DA01 DB01 DC01 EA16 HA06 HA21 5K061 DD12 JJ07

Claims (3)

[Claims] 1. A receiving apparatus in a specified low power wireless system, comprising: a demodulation unit for demodulating a signal; a reception intensity output unit for outputting a reception intensity of a signal; and a signal processing unit for determining that the signal is within a desired communication range. A first holding unit that holds a reception intensity level serving as a reference for determining a communication range and registers an ID of a transmitter. 2. The receiving apparatus according to claim 1, wherein said receiving apparatus includes a second holding unit capable of recording an access history of the transmitter from outside the communication range. 3. The receiving device according to claim 1, wherein the receiving device includes a display unit capable of displaying an access history of the transmitter from outside the communication range.