JP2003244775A - Wireless transmission/reception system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless transmission/reception system capable of reducing the power consumption of a wireless transmitter side. <P>SOLUTION: In the wireless transmission/reception system wherein a wireless transmitter 1 controls a load 3 via a wireless receiver 2, a first control section 11 of the wireless transmitter 1 measures a time after transmission of a transmission signal until receiving a reply signal from the wireless receiver 2 at least once, delays a start timing of a reception period L able to receive the reply signal while including a reply signal receiving point of time t1, reduces the reception period L to set again a succeeding reception period LN and its start timing, receives the reply signal from the wireless receiver 2 over the reduced reception period LN, and brings an input to an input section 15 to a standby state after the end of the reduced reception period LN or the end of reception processing to reduce the power consumption of the wireless transmitter 1. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless transmission / reception system for controlling loads such as electric equipment by wireless.

[0002]

2. Description of the Related Art As a conventional radio transmission / reception system, a radio transmitter for controlling a load of electrical equipment by using a radio and a radio receiver attached to the load are provided. A device that can control the load by sending a control signal, which is a control signal, and send a response signal back from the wireless receiver to the wireless transmitter so that the wireless transmitter can know that the load has been controlled. Can be mentioned.

The radio transmitter receives a response signal from the radio receiver during a reception period (hereinafter referred to as reception period L).
Can be received within.

In the radio transmitter of the above-mentioned radio transmission / reception system, for example, a continuous reception system in which a reception period L is always provided and a response signal from the radio receiver is always received, or a reception period L is intermittently provided in a constant cycle. There is an intermittent reception system that repeats the response reception operation from the wireless receiver. Note that FIG. 8 shows the operation timing of the wireless receiver.
FIG. 8A shows a transmission signal from the wireless transmitter, and FIG.
FIG. 8B shows the continuous reception method, and FIG. 8C is an explanatory diagram showing the operation timing of the intermittent reception method.

[0005]

However, in the wireless transmission / reception system as described above, the wireless transmitter receives a signal other than when the transmission signal is transmitted, for example, during continuous reception or during intermittent reception. There was a problem that power was continuously consumed during the period.

Further, depending on the installation conditions and installation distance between the wireless transmitter and the wireless receiver, the intensity of the wireless signal from the wireless transmitter may be an excessive output, and there is a possibility that unnecessary power may be consumed. There was a point.

In addition, when transmitting a transmission signal from a radio transmitter to a radio receiver, so-called continuous transmission may be performed in which the transmission signal is continuously transmitted a plurality of times in order to improve communication reliability. Depending on the installation conditions and installation distance with the vessel,
There is a problem in that unnecessary power may be consumed due to excessive continuous transmission.

The present invention has been made to solve the above problems, and it is an object of the present invention to provide a wireless transmission / reception system in which the power consumption on the wireless transmitter side is reduced.

[0009]

According to a first aspect of the present invention, there is provided a wireless transmission / reception system, which has an event trigger for controlling at least one load 3 to be controlled, as shown in FIG. 1 and FIG. An input unit 15 for inputting is provided, a transmission signal for modulating transmission data and controlling the load is transmitted to a reception side, and a response signal returned from the reception side due to the control of the load 3 is received. A radio transmitter 1 having a function of receiving and demodulating in the inside, and receiving the demodulation signal from the radio transmitter 1 and demodulating it, and loading the load 3
And a radio receiver 2 which is the receiving side and which has a function of sending a control command to the radio transmitter 1 and returning the response signal to the radio transmitter 1. In the wireless transmission / reception system that controls the load 3 via the device 2, the wireless transmitter 1 measures at least once the time from the transmission of the transmission signal to the reception of the response signal. Based on the result
By delaying the start timing of the reception period L while including the response signal reception time point t1, and shortening the reception period L, the next reception period LN and its start timing are reset, and the shortened reception period is set. After receiving the response signal from the wireless receiver 2 over the LN, and after the shortened reception period LN is completed or after the reception process is completed, the input to the input unit 15 is put in a standby state, thereby the wireless transmitter. It is characterized by including the first control unit 11 for reducing the power consumption of No. 1.

The wireless transmission / reception system according to claim 2 further comprises an input unit 15 for inputting an event trigger for controlling at least one load 3 to be controlled,
A function of modulating transmission data and transmitting a transmission signal for controlling the load to the reception side, and receiving and demodulating a response signal returned from the reception side due to the control of the load 3 during the reception period. A wireless transmitter 1 provided, and a function of receiving the transmission signal from the wireless transmitter 1, demodulating the signal, giving a control command to the load 3, and returning the response signal to the wireless transmitter 1. And a wireless receiver 2 on the receiving side, wherein the wireless transmitter 2 controls the load 3 through the wireless receiver 2 by the wireless transmitter 1. , The time from the reception of the received signal from the radio transmitter 1 to the return of the response signal is measured at least once, and the response signal is time information obtained by subtracting a predetermined margin from the measured time. The wireless transmitter 1 further includes a second control unit 21 for notifying the wireless transmitter 1, and the wireless transmitter 1 determines the start timing of the reception period L based on the response signal including the time information, at the time of receiving the response signal. While delaying while including, by shortening the reception period L, reset the next reception period LN and its start timing, receive the response signal from the wireless receiver over the shortened reception period, After the end of the shortened reception period LN or after the completion of the reception process, the input to the input unit 15 is put in a standby state to reduce the power consumption of the wireless transmitter 1.
It is characterized by including a control unit 11.

The wireless transmission / reception system according to a third aspect of the present invention includes an input section 15 for inputting an event trigger for controlling at least one load 3 to be controlled, as shown in FIG. A function of transmitting a transmission signal for modulating the transmission data and controlling the load to the reception side, and receiving and demodulating a response signal returned from the reception side due to the control of the load 3 during the reception period. And a function of receiving the transmission signal from the wireless transmission device 1, demodulating the same, giving a control command to the load 3, and returning the response signal to the wireless transmission device 1. In the wireless transmission / reception system, which comprises the wireless receiver 2 on the receiving side, the wireless transmitter / receiver 1 controls the load 3 via the wireless receiver 2. 1 has a function of continuously transmitting the outgoing signal for a predetermined number of times in succession, and after transmitting the outgoing signal, receives the response signal from the wireless receiver 2 for a receiving period L and receives the response period L. To the wireless receiver 2
After the reception processing of the response signal is completed, the first control unit 11 that reduces the power consumption of the wireless transmitter 1 by stopping the continuous transmission and setting the input to the input unit 15 in a standby state.
It is characterized by having.

Further, the wireless transmission / reception system according to claim 4 comprises an input section 15 for inputting an event trigger for controlling at least one load 3 to be controlled, as shown in FIG. A function of transmitting a transmission signal for modulating the transmission data and controlling the load to the reception side, and receiving and demodulating a response signal returned from the reception side due to the control of the load 3 during the reception period. And a function of receiving the transmission signal from the wireless transmission device 1, demodulating the same, giving a control command to the load 3, and returning the response signal to the wireless transmission device 1. The radio transmitter 1 which is provided with the radio receiver 2 on the receiving side, and which uses a duplex system in which different frequencies are used for transmission of the transmission signal and reception of the response signal. By In the wireless transmission / reception system which controls the load 3 via the wireless receiver 2, the wireless transmitter 1 has a function of continuously transmitting the transmission signal a predetermined number of times, and transmits the transmission signal. After that, the response signal is received from the wireless receiver 2 for a reception period L, and after the reception processing is completed, the continuous transmission is stopped and the input to the input unit 15 is put in a standby state, thereby the wireless transmitter. It is characterized by including the first control unit 11 for reducing the power consumption of No. 1.

Further, in the wireless transmission / reception system according to a fifth aspect of the present invention, as shown in an example of FIG. 5, in the invention according to the third or fourth aspect, the reception of the wireless receiver 2 is fixed. A second control unit 21 having a function of storing a continuous transmission number of the transmission signal transmitted continuously at a time point and including the continuous transmission number in the response signal and returning it to the wireless transmitter 1. , The first control unit 11 of the wireless transmitter 1, based on the information of the serial number in the received response signal,
It is characterized in that it is provided with a function of determining the number of continuous transmissions at the time of transmitting the transmission signal next time.

The wireless transmission / reception system according to a sixth aspect of the present invention, as shown in FIG. 6 and FIG.
In the invention according to any one of claims 5 to 6, the wireless transmitter 1 includes an output adjusting unit 18 that adjusts the output of the outgoing signal, and the wireless receiver 2 measures the intensity of the outgoing signal. The wireless receiver 2 is provided with an intensity measuring unit 28.
Measures the strength information of the outgoing signal received by the strength measuring unit 28, sends the strength information in the response signal back to the wireless transmitter 1, and the wireless transmitter 1 receives the received information. The output adjustment unit 18 controls the output of the next transmission signal transmission based on the intensity information in the response signal.

Note that the above-mentioned reception processing completion means that the transmission signal from the wireless transmitter 1 is received by the wireless receiver 2 and the response signal returned from the wireless receiver 2 is completely received by the wireless transmitter 1. Means

Further, the continuous transmission means that the transmission signal is continuously transmitted from the radio transmitter 1 to the radio receiver 2 a plurality of times regardless of the presence or absence of a transmission interval.

[0017]

DETAILED DESCRIPTION OF THE INVENTION A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a wireless transmission / reception system according to a first embodiment of the present invention,
FIG. 2 is an operation timing chart of the wireless transmitter 1.

In the first embodiment, the reception period of the radio transmitter 1 is learned from the previous sampling and the reception period of the next radio transmitter 1 is reset to reduce the power consumption on the radio transmitter 1 side. To do.

In the first embodiment, as shown in FIG. 1, the wireless transmission / reception system includes a wireless transmitter 1, a wireless receiver 2 and a load 3 (at least one load in FIG. 1) such as at least one electric facility. 3 discloses the case where there is one).

This radio transmission / reception system includes a radio receiver 2
To the wireless transmitter 1, the wireless transmitter 1 transmits a control signal, which is a control signal, to control the load 3, and the wireless receiver 2 returns a response signal to the wireless transmitter 1. Is controlled and the state of the load 3 can be grasped.

Here, the radio transmitter 1 is, for example, remote and has an input unit 15 for inputting a trigger signal which is an event trigger for controlling the load 3 to which a control command is given from the radio receiver 2, and a radio signal. A first antenna unit 14 for transmitting and receiving a radio wave, a first transmitting unit 12 for modulating transmission data and transmitting an outgoing signal via the first antenna unit 14, and a radio receiver 2
From the first receiving unit 13 that receives and demodulates a response signal via the first antenna unit 14, and the first receiving unit 13 that presents, displays, and notifies the reception of the response signal, the control of the load 3, and the state of the load 3 The display unit 16 includes a display unit 16, a first control unit 11 that controls the respective units and has the functions described below, and a first power supply unit 17 such as a battery that supplies power to the respective units.

The radio receiver 2 also includes a second antenna section 24 for transmitting and receiving radio signals, a second receiving section 23 for receiving and demodulating a transmission signal from the radio transmitter 1, and a second antenna for modulating response data. The wireless transmitter 1 sends a response signal via the unit 24.
To the load 3 to be controlled, the output unit 25 that gives a control command to the load 3 to be controlled, the reception of the transmission signal, the control of the load 3, and the state of the load 3 are presented, displayed, and notified, for example. The second display unit 26, the second control unit 21 that controls each unit, and the second power supply unit 27 such as a battery that supplies power to each unit.

Here, in the wireless transmission / reception system of the first embodiment, for example, a user (not shown) pushes a switch (not shown) of the wireless transmitter 1, a human sensor (not shown), or the like. The system is such that an input event occurs in response to a trigger signal which is an event trigger added to the reaction of, and the load 3 is remotely controlled. In the case of such a wireless transmission / reception system, the input unit 15 of the wireless transmitter 1 corresponds to the switch or the human sensor, and the first display unit 16 of the wireless transmitter 1 includes, for example, an LED or a speaker.

Here, the first control unit 11 of the radio transmitter 1
Measures at least once the time until the response signal is received from the wireless receiver 2 after transmitting the transmission signal, and averages and stores, for example, the transmission signal transmission from the transmission signal transmission to the reception of the response signal according to the number of samplings. It has a function of determining a reception period LN, which will be described later, for operating the first reception unit 13 next time based on time.

Further, the first control unit 11 has a function of reducing the power consumption of the radio transmitter 1 by putting the input to the input unit 15 in a standby state after the end of the reception period LN or after the reception process is completed. I have it.

The operation timing of the wireless transmitter 1 in the wireless transmission / reception system will be described below with reference to FIG.

First, a user (not shown) is a wireless transmitter 1.
By pressing a switch (not shown) that is the input unit 15 of the above, a trigger signal that is an event trigger for remotely operating the load 3 is input to the first control unit 11. Then the first
The controller turns on the power of the first transmitter and the first receiver,
A set value such as a frequency is written in an L (Phase Lock Loop) synthesizer (not shown).

At the end of writing the set value,
The PLL synthesizer starts radio frequency oscillation. The time until the oscillation stabilizes is called the PLL lock time. For example, in a specific low power radio, it is 20 m.
It is about sec. The PLL lock time is PL
It may also refer to the time until the lock is detected by the phase comparator (not shown) constituting the L synthesizer.

Then, the first control section 11 sends the transmission data to the first transmission section 12 in response to the trigger signal from the input section 15. The first transmission unit 12 modulates a radio signal according to the transmission data and transmits the transmission signal through the first antenna unit 14.

The first control section 11 also sets a reception period L in which the response signal can be received from the radio receiver 2. In addition, in the first embodiment, the reception period L is a predetermined value determined in consideration of the rising time of the first reception unit 13, and the start timing thereof is as shown in FIG. For example, immediately after the transmission signal is transmitted.

Here, for example, the first control section 11 samples and measures at least once the time until the response signal from the radio receiver 2 is received after the transmission signal is transmitted,
Based on the time from the transmission of the outgoing signal to the receipt of the response signal, which is stored after performing the averaging process in accordance with the measured number of samplings, the initial receiving period L to the next receiving period L
N is determined, and the next reception period is reset from L to LN.

Here, the start timing of the next reception period LN is the response signal reception time t1 at the time of sampling measurement.
(Depending on the number of times of sampling, it is determined to include the average value at the time of reception), and is shown by M which is a desired delay time in FIG.

The reception period LN length can be determined depending on the reliability of the wireless transmission / reception system, but preferably the reception period L is shortened to, for example, about several times the PLL lock time. Set.

The first controller 11 optimizes the time for operating the first receiver 13 as shown in FIG. 2 (b),
After transmitting the outgoing signal, the first receiving unit 13 is operated only during the reception period LN, the response signal is received from the wireless receiver 2, and the presence or absence of the response signal from the wireless receiver 2 is determined during the reception period LN. To do.

Further, when there is a response signal from the radio receiver 2 during the reception period LN, the first control unit 11 completes the reception state of the response signal, that is, the reception signal processing is completed. To continue. In addition, the first control unit 11 receives the input signal from the input unit 1 after the reception period LN ends or the reception process ends.
The power consumption of the wireless transmitter 1 is reduced by setting a state for waiting for an input event to 5 (hereinafter referred to as an input standby period).

The first control unit 11 includes the first transmission unit 12
The power consumption of the wireless transmitter 1 itself is further improved by cutting off the power supply of the first receiving unit 13 and using the low power consumption mode called the RAM backup mode or the sleep mode for the first control unit 11 itself. Can be reduced.

In such a wireless transmission / reception system, the first control unit 11 of the wireless transmitter 1 measures the time from the transmission of the transmission signal to the reception of the response signal at least once, and determines and stores it according to the number of samplings. Based on the time from the signal transmission to the response signal reception, the first receiving unit 13
Since the input waiting period is provided after the reception period LN for activating the above is determined and after completion of the reception period LN or after completion of the reception process, it is possible to reduce the power consumption on the wireless transmitter 1 side.

In addition, such a wireless transmission / reception system is particularly suitable for wireless transmission / reception systems when the wireless transmitter 1, the wireless receiver 2 and the load 3 constituting the wireless transmission / reception system are installed at relatively fixed positions and numbers. Excessive power consumption on the transmitter 1 side can be effectively reduced.

Here, it goes without saying that a repeater (not shown) or the like may be interposed between the radio transmitter 1 and the radio receiver 2.

In the first embodiment, FIG.
As shown in (a), the reception period L is started immediately after the transmission signal is transmitted from the wireless transmitter 1, but the processing time of the wireless receiver 2 to be communicated, the wireless transmitter 1 and the wireless receiver 2 If a delay in receiving the response signal at the wireless transmitter 1 is expected due to the presence of a repeater (not shown) between the receiver and the The start of L may be delayed.

In addition, in the first embodiment, the wireless receiver 2
The second controller 21 of the wireless communication device 1 receives at least one time from the reception signal received from the wireless transmitter 1 to the reply signal returned.
The second transmitting unit 22 to the second antenna unit 2 measure the times and include the time information obtained by subtracting a predetermined margin from the measured time from the reception signal reception to the response signal reply to the response signal.
You may make it notify to the radio transmitter 1 via 4.

In this case, the first control section 11 of the radio transmitter 1 starts the timing so as to include the response signal reception time t1 based on the response signal including the time information received from the radio receiver 2. Is delayed and the period length is shortened to determine the reception period LN as described above from the initial reception period L, and the next reception period is reset from L to LN.

In the wireless transmission / reception system of the first embodiment, the reception period of the next response signal from the previous sampling may be controlled as needed to optimize the reception period at all times.

Next, an embodiment in which a transmission signal is continuously transmitted from the radio transmitter 1 a plurality of times will be described as a second embodiment of the present invention with reference to FIG. FIG. 3 is an operation timing chart of the wireless transmitter 1 according to the second embodiment of the present invention.

The second embodiment uses the radio transmitter 1 having a function of continuously transmitting a transmission signal, and limits the input of the event trigger to the radio transmitter 1 after the completion of receiving the response signal from the radio receiver 2. Then, the power consumption on the wireless transmitter 1 side is reduced.

In the second embodiment, the first control unit 11 of the radio transmitter 1 provides a predetermined reception period L for receiving the response signal from the radio receiver 2 between each successive transmission signal, and a predetermined reception period L is provided. A plurality of times (n times), the transmission signal is continuously transmitted at a predetermined time interval T, and is determined in consideration of the rising time of the first receiving unit 13 after the transmission signal is transmitted. The response signal is received from the wireless receiver 2 for a predetermined reception period L, and after the reception process of the response signal from the wireless receiver 2 is completed in the reception period L, the continuous transmission is stopped.

The radio transmitter 1 according to the first embodiment will be described below.
Only the points different from the operation timing of will be described with reference to FIG.

In the first control section 11 of the radio transmitter 1, when the transmission signal is continuously transmitted a predetermined number of times (transmitting the transmission signals 1 to n while keeping the predetermined time interval T), the transmission signals are transmitted between the consecutive transmissions. That is, the first receiving unit 13 is operated only during the reception period L provided between consecutive transmission signals, and the presence or absence of a response signal from the wireless receiver 2 to be controlled during the reception period L is determined.

FIG. 3 shows an example of the operation timing of the wireless transmitter 1 when the response signal is received for the first time in the reception period L after transmitting the transmission signal 2.

When the response signal is received during the reception period L, the first control section 11 continues the reception state until the reception is completed, and after the reception signal processing is completed, the subsequent transmission signal is transmitted. The continuous transmission is stopped, and the first transmitter 12 and the first receiver 13
Be sure to turn off the power. The first control unit 11
When the response signal from the wireless receiver 2 is not within the reception period L, repeats the transmission of the outgoing signal.

In such a radio transmission / reception system, the first control unit 11 of the radio transmitter 1 has a function of continuously transmitting the transmission signal a predetermined number of times continuously, and after transmitting the transmission signal, the reception period L is continued. After the response signal is received from the wireless receiver 2 and after the reception processing of the response signal from the wireless receiver 2 is completed in the reception period L, an input waiting period is provided to reduce unnecessary communication traffic, and the next input event is Since the power is not consumed as much as possible until the power is generated, it is possible to reduce the power consumption on the wireless transmitter 1 side.

Next, an embodiment relating to the duplex transmission / reception system will be described as a third embodiment of the present invention with reference to FIG. FIG. 4 is an operation timing chart of the wireless transmitter 1 according to the third embodiment of the present invention.

In the third embodiment, the second method is used by using the duplex system.
Similar to the wireless transmission / reception system of the embodiment, after the completion of receiving the response signal from the wireless receiver 2, the input of the event trigger using the wireless transmitter 1 is limited to reduce the power consumption on the wireless transmitter 1 side. Is.

In the third embodiment, different frequencies are used for the transmission signal transmitted from the radio transmitter 1 to the radio receiver 2 and the response signal from the radio receiver 2 to the radio transmitter 1. Since it is a so-called duplex radio transmission / reception system, the radio transmitter 1 can simultaneously transmit a transmission signal and receive a response signal.

Here, in the second embodiment, the transmission signal is continuously transmitted a predetermined number of times while maintaining the predetermined time interval T, but in the third embodiment, since it is the duplex system, As shown in 4, it is possible to send one outgoing signal in response to an input event and immediately send the next outgoing signal, that is, it is possible to send outgoing signals of a predetermined number of times completely continuously. is there.

The first control section 11 of the radio transmitter 1 operates the first receiving section 13 in synchronization with the start of transmission of the transmission signal. The first receiving unit 13 is operated only during a predetermined reception period L determined in consideration of the above, and the presence or absence of a response signal from the wireless receiver 2 to be controlled is determined during the reception period L.

In the third embodiment, as shown in FIG. 4, the reception period L starts immediately after the transmission of the transmission signal 1 and continues until the transmission signal n, which is the prescribed number of continuous transmissions, is transmitted. Is.

When the response signal is received during the reception period L, when the reception of the response reception is completed, the first receiving unit 13 finishes the reception even in the middle of the reception period L, and the subsequent transmission of the transmission signal is continued. Stop sending. That is, the first control unit 11 suspends the continuous transmission of the outgoing signal when the response signal is received even during the continuous transmission of the outgoing signal.

In such a wireless transmission / reception system, with respect to a transmission signal transmitted from the wireless transmitter 1 to the wireless receiver 2 and a response signal from the wireless receiver 2 to the wireless transmitter 1,
It makes it possible to use the transmission signal and the response signal at the same time by using the duplex system that uses different frequencies, and after the reception signal processing is completed, the input waiting period is provided to reduce unnecessary communication traffic and It is possible to reduce the power consumption on the side of the wireless transmitter 1 by not consuming the power as much as possible until the input event of 1. occurs.

Next, using the radio transmitter 1 capable of continuously transmitting the transmission signal as shown in the second embodiment, based on the information regarding the transmission number in the response signal received by the radio receiver 2. An embodiment for determining the number of consecutive transmissions at the time of transmitting the next transmission signal will be described as a fourth embodiment of the present invention with reference to FIG. FIG. 5 is an operation timing chart of the wireless transmitter 1 according to the fourth embodiment of the present invention.

In the fourth embodiment, the next transmission signal transmission number by the radio transmitter 1 is determined based on the transmission number of the transmission signal actually received by the radio receiver 2, and the radio transmitter 1 side is determined. It reduces power consumption.

In the fourth embodiment, the second controller 21 of the wireless receiver 2 counts the serial numbers of the outgoing signals indicated by the outgoing signals 1 to n transmitted from the wireless transmitter 1.
It is provided with a function of judging how many times the outgoing signal is used to determine the reception process and storing the continuous transmission number of the determined outgoing signal.

In addition to the function shown in the first embodiment, the second control section 21 sends back to the radio transmitter 1 the response signal including the serial number information at the time of confirmation of reception stored as described above. It has a function to do.

Then, the first control section 11 of the radio transmitter 1 determines the number of consecutive transmissions at the next transmission signal transmission based on the serial number information in the response signal received from the radio receiver 2. It is equipped with the function to reset the serial number in the sending number information.

The operation timing of the wireless transmitter 1 in the wireless transmission / reception system will be briefly described below with reference to FIG.

First, as shown in FIG. 5 (a), the radio transmitter 1 continuously transmits a transmission signal. Next, although not shown,
Here, the second control unit 21 of the wireless receiver 2 determines the reception process with the transmission signal 2 transmitted from the wireless transmitter 1, for example. Then, the second control unit 21 stores the transmission signal number at the time of confirming the reception, that is, the continuous transmission numbers 1 and 2 as the continuous transmission number information. The second control unit 21 also returns the serial number information included in the response signal to the wireless transmitter 1.

In the radio transmitter 1, as shown in FIG. 5B, the first control unit 11 continuously transmits the next transmission signal based on the transmission number information included in the response signal and returned. Then, only the two outgoing signals, outgoing signal 1 and outgoing signal 2, are continuously transmitted.

In this wireless transmission / reception system, the second control unit 21 of the wireless receiver 2 sends the transmission signal by including the information of the continuous transmission number confirmed to be received in the response signal and returning it to the wireless transmission device 1. It is possible to eliminate unnecessary continuous transmission of the wireless transmitter 1, effective use of the power consumption of the wireless transmitter 1 side, and reduction of communication traffic.

Although the second controller 21 of the radio receiver 2 determines the number of consecutive transmissions of the transmission signal in the fourth embodiment, it is controlled for each communication, but the transmission information of a plurality of times is transmitted, for example. It may be determined and controlled by averaging.

In the wireless transmission / reception system of the fourth embodiment, it is of course possible to always control the number of consecutive transmission signal transmissions from the previous sampling to optimize the number of consecutive transmissions.

Next, another embodiment will be described with reference to the fifth embodiment of the present invention.
An embodiment will be described with reference to FIGS. 6 and 7. Figure 6
[Fig. 7] is a block diagram showing a wireless transmission / reception system according to a fifth embodiment of the present invention, and Fig. 7 is an operation timing diagram of the wireless transmitter 1. The same parts as those in the first embodiment are designated by the same reference numerals, and the description of common parts will be omitted.

In the fifth embodiment, the strength information of the transmission signal actually received by the wireless receiver 2 is fed back to the wireless transmitter 1 to determine the strength of the next transmission signal by the wireless transmitter 1, and the wireless transmitter 1 is determined. It is intended to reduce the power consumption on the one side.

In the fifth embodiment, as shown in FIG. 6, the radio transmitter 1 is provided with an output adjusting section 18 for adjusting the output of the transmission signal, and the radio receiver measures the intensity of the transmission signal. This is a configuration including a strength measuring unit 28 that operates.

The output adjusting section 18 controls the bias voltage and the current of the output amplifier (not shown) of the first transmitting section 12 by the signal from the first controlling section 11, for example. Also,
The strength measuring unit 28 is an RSSI attached to the second receiving unit 23.
(Receiving Signal Strength
The intensity of the outgoing signal is measured using the h Indicator) function or the like.

Here, the radio receiver 2 includes the intensity measuring unit 28.
The strength of the outgoing signal received at is measured, the difference between the reception sensitivity (reception capability) of the wireless receiver 2 and the radio field strength of the received transmission signal is calculated, and this difference is used as strength information, and the strength information is returned. The signal is returned to the wireless transmitter 1 by including it in the signal, and the wireless transmitter 1 controls the output of the next transmission signal transmission by the output adjusting unit 18 based on the intensity information in the received response signal.

The operation timing of the wireless transmitter 1 in the wireless transmission / reception system will be described below with reference to FIG. Note that FIG. 7A shows a case where the wireless transmitter 1 receives the response signal from the wireless receiver 2 during the reception period L.

First, as shown in FIG. 7 (a), the radio transmitter 1 transmits a transmission signal. Next, although not shown,
The intensity measuring unit 28 of the wireless receiver 2 measures the intensity of the transmission signal transmitted from the wireless transmitter 1, obtains the intensity information as described above, and stores it, for example, as necessary. Then, the intensity measuring unit 28 includes this intensity information in the response signal and sends it back to the wireless transmitter 1.

In the radio transmitter 1, as shown in FIG. 7B, the output adjusting unit 18 makes a desired transmission output of the next transmission signal on the basis of the strength information included in the response signal and returned. To control the value.

Here, in the fifth embodiment, the intensity measuring section 28 has a function of calculating the difference between the receiving sensitivity (reception capability) of the radio receiver 2 and the radio field intensity of the received transmission signal, for example. , The information of the difference between the receiving sensitivity of the wireless receiver 2 and the radio field intensity of the received transmission signal is used as the intensity information, and the intensity information is reflected in the output adjusting unit 18 of the wireless transmitter 1, and the radio wave of the outgoing signal transmitted next time Control strength.

The output adjusting unit 18 controls the radio field intensity of the outgoing signal to be transmitted next time. For example, the radio field intensity of the received transmission signal is sufficiently higher than the reception sensitivity (capability) of the radio receiver 2. If it is larger, the output adjusting unit 18 of the wireless transmitter 1 reduces the transmission power of the transmission signal for transmission, and the radio wave intensity of the received transmission signal is, for example, barely compared with the reception sensitivity (capability) of the wireless receiver 2. In this case, the output adjusting unit 18 of the wireless transmitter 1 increases the transmission power of the transmission signal and transmits the signal.

Since the radio receiver 2 which controls the load 3 and the radio transmitter 1 which controls the load 3 are often installed in predetermined places, the communication can be regarded as fixed section communication. In many cases.

Therefore, except for the influence of fading, the transmission power required for communication can be regarded as a substantially constant value. When the transmission power can be regarded as a substantially constant value in this way, the wireless receiver When the signal strength of the transmission signal is higher than the value obtained by adding the fading margin to the reception sensitivity of 2, communication can be sufficiently performed even if the transmission output of the transmission signal is reduced.

On the contrary, when the signal strength is lower than the value obtained by adding the fading margin to the reception sensitivity of the radio receiver 2, the certainty of communication is increased by increasing the transmission output of the transmission signal.

In such a wireless transmission / reception system, the intensity measuring unit 28 of the wireless receiver 2 calculates the intensity information of the received outgoing signal, sends the intensity information into the response signal and returns it to the wireless transmitter 1, The output adjusting unit 18 of the transmitter 1 controls the output of the next transmission signal transmission based on the strength information in the received response signal, so that communication can be performed with appropriate transmission power.

In the fifth embodiment, the adjustment of the transmission power of the transmission signal by the output adjustment unit 18 of the radio transmitter 1 is controlled for each communication, but the intensity information of a plurality of times is averaged, for example. It may be determined and controlled accordingly.

In the wireless transmission / reception system of the fifth embodiment, the output intensity of the transmission signal from the previous sampling to the next may be controlled at any time to optimize the output intensity of the transmission signal at all times. .

In the fifth embodiment, the wireless receiver 2 has a function of calculating the difference between the reception sensitivity of the wireless receiver 2 and the radio field intensity of the received transmission signal.
It may be provided in the wireless transmitter 1.

In this case, the strength measuring section 28 of the radio receiver 2 measures the radio field strength of the received transmission signal and includes the measured strength as strength information in the response signal.
To the next transmission signal for transmitting the difference information between the reception sensitivity of the wireless receiver 2 stored in advance in the output adjustment unit 18 of the wireless transmitter 1 and the intensity information included in the response signal. It is controlled so that it is reflected in the signal strength of.

Here, in the second to fifth embodiments, as in the first embodiment, in order to further reduce the power consumption of the radio transmitter 1, the first control unit 11 causes the first transmission unit to operate. It is also possible to turn off the power supply to the first receiver 12 and the first receiver 13, or to use a low power consumption mode called a RAM backup mode or a sleep mode for the first controller 11 itself.

Further, in the first to fifth embodiments, the length of the reception period L shown in the drawing is changed according to each embodiment, but the first reception unit 13 rises. It may be a predetermined value determined in consideration of time and the like.

[0091]

As described above, in the wireless transmission / reception system of the invention according to claim 1 of the present application, the first control unit of the wireless transmitter sets the time from the transmission of the transmission signal to the reception of the response signal at least once. A new reception period for operating the first reception unit of the wireless transmitter next time is set based on the time from the transmission of the transmission signal to the reception of the response signal which is measured and determined according to the number of times of sampling and stored. After the end of the newly set reception period or the completion of the reception process, the event input to the input unit of the wireless transmitter is put in a standby state, so that the power consumption on the wireless transmitter side can be reduced. Produce an effect.

In the wireless transmission / reception system of the invention according to claim 2, the time from the reception of the reception signal from the wireless transmitter to the reply of the response signal by the second controller of the wireless receiver is set. Measured at least once and determined according to the number of times of sampling. Based on the time from transmission signal transmission to response signal reception, which was stored, time information obtained by subtracting a predetermined margin is included in the response signal to the wireless transmitter. The first control unit of the wireless transmitter sets a new reception period for operating the first receiving unit of the wireless transmitter next time based on the response signal including the time information received from the wireless receiver. Along with
After the end of the newly set reception period or the completion of the reception process, the event input to the input unit of the wireless transmitter is put in a standby state, so that the power consumption on the wireless transmitter side can be reduced. Produce an effect.

Further, in the wireless transmission / reception system of the invention according to claim 3, the first controller of the wireless transmitter has a function of continuously transmitting the transmission signal a predetermined number of times, and transmits the transmission signal. After transmitting, the response signal is received from the wireless receiver for the receiving period, and after the reception processing of the response signal from the wireless receiver is completed during the receiving period, the event input to the input part of the wireless transmitter must be in the standby state. Thus, unnecessary communication traffic is reduced and power is not consumed as much as possible until the next input event occurs, so that it is possible to reduce power consumption on the wireless transmitter side.

Further, in the wireless transmission / reception system of the invention according to claim 4, with respect to the transmission signal transmitted from the wireless transmitter to the wireless receiver and the response signal from the wireless receiver to the wireless transmitter, To enable simultaneous use of the transmission signal and the response signal by using the duplex system that uses different frequencies, and to put the event input to the input section of the wireless transmitter into the standby state after the reception signal processing is completed. By reducing unnecessary communication traffic and consuming as little power as possible until the next input event occurs, it is possible to reduce the power consumption on the wireless transmitter 1 side. Play.

Further, in the wireless transmission / reception system of the invention according to claim 5, in the invention according to claim 3 or 4, the second control unit of the wireless receiver is the continuous transmission number whose reception is confirmed. By including the information of the above in the response signal and returning it to the wireless transmitter, it becomes possible to eliminate unnecessary continuous transmission of the transmitting signal, and effective use of the power consumption of the wireless transmitter side can be achieved.
This has the effect of reducing communication traffic.

Further, in the wireless transmission / reception system of the invention according to claim 6, in the invention according to any one of claims 1 to 5, the intensity measuring unit of the wireless receiver receives the transmitted signal. The strength information is calculated, the strength information is included in the response signal and returned to the wireless transmitter, and the output adjustment unit of the wireless transmitter outputs the next transmission signal based on the strength information in the received response signal. By controlling the, there is an effect that it becomes possible to communicate with appropriate transmission power.

[Brief description of drawings]

FIG. 1 is a block diagram showing a wireless transmission / reception system according to a first embodiment of the present invention.

FIG. 2 is an operation timing chart of the wireless transmitter according to the first embodiment of the present invention.

FIG. 3 is an operation timing chart of the wireless transmitter according to the second embodiment of the present invention.

FIG. 4 is an operation timing chart of the wireless transmitter according to the third embodiment of the present invention.

FIG. 5 is an operation timing chart of the wireless transmitter according to the fourth embodiment of the present invention.

FIG. 6 is a block diagram showing a wireless transmission / reception system according to a fifth embodiment of the present invention.

FIG. 7 is an operation timing chart of the wireless transmitter according to the fifth embodiment of the present invention.

FIG. 8 is an operation timing chart of the wireless transmitter according to the conventional example.

[Explanation of symbols]

1 wireless transmitter 2 wireless receiver 3 load 11 First control unit 12 First transmitter 13 First receiver 14 First antenna section 15 Input section 16 First display 17 First power supply 18 Output adjustment section 21 second control unit 22 Second transmitter 23 Second Receiver 24 Second antenna section 25 Output section 26 Second display 27 Second power supply section 28 Strength measurement section L, LN reception period

Continued front page    (72) Inventor Ken Iriyama             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Hideki Kasai             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Masayuki Matsuo             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company F-term (reference) 5K011 DA28 KA03 LA08                 5K048 AA16 BA21 DB01 DC01 EB02                       EB03 FA02 HA04

Claims (6)

[Claims] 1. An input unit for inputting an event trigger for controlling at least one load to be controlled, the transmission unit modulating the transmission data, transmitting an outgoing signal for controlling the load, and transmitting the outgoing signal to the receiving side. A radio transmitter having a function of receiving and demodulating a response signal returned from the receiving side during the reception period by controlling the load, and receiving and demodulating the transmission signal from the radio transmitter, A radio receiver which is the receiving side and which has a function of giving a control command to the load and returning the response signal to the radio transmitter. In the wireless transmission / reception system for controlling the load via the wireless transmitter, the wireless transmitter measures at least once the time from the transmission of the transmission signal to the reception of the response signal. The results on the basis of the delays while containing a response signal reception time of the start timing of the reception period with,
By shortening the reception period, the next reception period and its start timing are reset, the response signal is received from the wireless receiver over the shortened reception period, and after the shortened reception period ends. Or after the reception process is completed,
A wireless transmission / reception system comprising: a first control unit that reduces power consumption of the wireless transmitter by putting an input to the input unit in a standby state. 2. An input unit for inputting an event trigger for controlling at least one load to be controlled, wherein an input signal for modulating transmission data and transmitting the transmission signal for controlling the load is transmitted to a receiving side, A radio transmitter having a function of receiving and demodulating a response signal returned from the receiving side during the reception period by controlling the load, and receiving and demodulating the transmission signal from the radio transmitter, A radio receiver which is the receiving side and which has a function of giving a control command to the load and returning the response signal to the radio transmitter. In the wireless transmission / reception system for controlling the load via the wireless receiver, the wireless receiver receives at least once the time from receiving the reception signal from the wireless transmitter to returning the response signal. A second control unit that measures and includes, in the response signal, time information obtained by subtracting a predetermined margin from the measured time, and notifies the radio transmitter of the time information, wherein the radio transmitter includes the time information. On the basis of the response signal, the start timing of the reception period is delayed while including the response signal reception time, and the reception period is shortened, thereby resetting and shortening the next reception period and its start timing. The response signal is received from the wireless receiver over the reduced reception period, and after the shortened reception period ends or after the reception process is completed, the input to the input unit is placed in a standby state, thereby the wireless transmitter. A wireless transmission / reception system comprising a first control unit for reducing power consumption of the wireless communication system. 3. An input unit for inputting an event trigger for controlling at least one load to be controlled, wherein an input signal for modulating transmission data and transmitting the transmission signal for controlling the load is transmitted to a receiving side, A radio transmitter having a function of receiving and demodulating a response signal returned from the receiving side during the reception period by controlling the load, and receiving and demodulating the transmission signal from the radio transmitter, A radio receiver which is the receiving side and which has a function of giving a control command to the load and returning the response signal to the radio transmitter. In the wireless transmission / reception system for controlling the load via the wireless transmitter, the wireless transmitter has a function of continuously transmitting the transmission signal a predetermined number of times, and after transmitting the transmission signal, reception is performed. After receiving the response signal from the wireless receiver over a period of time and completing the reception process of the response signal from the wireless receiver during the reception period, the continuous transmission is stopped and the input to the input unit is set to a standby state. The wireless transmission / reception system is provided with a first controller that reduces the power consumption of the wireless transmitter. 4. An input unit for inputting an event trigger for controlling at least one load to be controlled, wherein an input signal for modulating transmission data and transmitting the transmission signal for controlling the load is transmitted to a receiving side, A radio transmitter having a function of receiving and demodulating a response signal returned from the receiving side during the reception period by controlling the load, and receiving and demodulating the transmission signal from the radio transmitter, A radio receiver, which is the receiving side, is provided with a function of giving a control command to the load and returning the response signal to the radio transmitter, and transmitting the transmission signal and transmitting the response signal. In a wireless transmission / reception system that controls the load via the wireless receiver by the wireless transmitter using a duplex system that uses different frequencies for reception and Of a plurality of consecutive transmission of the transmission signal, after transmitting the transmission signal, the response signal is received from the wireless receiver over the reception period, and after the reception processing is completed, the transmission is performed. A wireless transmission / reception system comprising: a first control unit that reduces power consumption of the wireless transmitter by suspending and putting an input to the input unit in a standby state. 5. The wireless receiver stores the continuous transmission number of the transmission signal that is continuously transmitted at the time when the reception is confirmed, and includes the continuous transmission number in the response signal and returns it to the wireless transmission device. And a second control unit having a function to perform, the first control unit of the wireless transmitter, based on the information of the serial number in the received response signal, when the next transmission signal is transmitted. The wireless transmission / reception system according to claim 3 or 4, further comprising a function of determining the number of consecutive transmissions. 6. The wireless transmitter includes an output adjusting unit that adjusts the output of the outgoing signal, the wireless receiver includes an intensity measuring unit that measures the intensity of the outgoing signal, and the wireless receiver includes: , Measuring the strength information of the transmission signal received by the strength measuring unit, including the strength information in the response signal and returning it to the wireless transmitter, and the wireless transmitter in the received response signal The wireless transmission / reception system according to any one of claims 1 to 5, wherein the output adjustment unit controls the output of the next transmission signal transmission based on the intensity information.