JP2699782B2 - Transmission / reception system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission / reception system for intermittently waiting for a signal to reduce the power consumption of a reception device and to realize a reception device with an extended battery life.

[0002]

2. Description of the Related Art A transmission / reception system of this kind will be described with reference to FIG. FIG. 6 is an external perspective view when the transmission / reception system using a radio wave signal is applied to a remote control of an instantaneous gas water heater. The gas water heater 101 is usually installed outdoors or in a machine room. The water supplied from the water pipe 103 is heated by burning the gas supplied from the gas hot water pipe 102, and the hot water is supplied to the shower 107 in the bathroom 105 and the faucet 108 in the kitchen 106 through the hot water pipe 104. Remote controls 109 and 110 are installed in the bathroom 105 and the kitchen 106, and can monitor the operation for adjusting the hot water supply temperature and the operation state of the gas water heater 101. Operation signals from remote controllers 109 and 110 to gas water heater 101 and remote control 109 and 110 from gas water heater 101
Since the operating state signal is transmitted by radio signals 111 and 112, there is no need to wire a signal line therebetween. In addition, there is an advantage that the installation place is limited because a battery is used as the power source. However, on the other hand, battery replacement is troublesome, and reducing power consumption to reduce the frequency of battery replacement has become a very important technical issue. Particularly, it is the most important point to reduce the power consumption required for the signal waiting operation in the transmission / reception system.

[0005] Therefore, a configuration is considered in which communication is performed at the same time as the timing of transmitting from the transmitting device and the timing of waiting for receiving at the receiving device. The receiving device turns on the power of the receiving circuit only when there is a possibility that a signal is transmitted from the transmitting device. A low power consumption standby receiving operation can be performed, and the power of the receiving circuit is turned on as the communication time interval is increased. Can be reduced.

[0004]

However, in the above configuration, the communication timing is always constant and has the following problems. First, when a transmission collides with another similar transmission / reception system, the timing of communication is always constant between the two transmission / reception systems, so that it is very likely that a collision will occur again. Another problem is that communication must be performed at a fixed time interval until the receiving apparatus waits for reception. Further, once the communication timing between the transmitting device and the receiving device is shifted, it cannot be easily restored. Further, when the receiving device does not have the communication timing yet, it is necessary to continuously operate the receiving circuit and wait for reception until receiving the transmission signal. The longer the communication time interval is and the smaller the power consumption of the receiving circuit at the time of normal communication is, the longer the power-on time of the receiving circuit at this time is and the higher the power consumption is.

The present invention has been made to solve the above-mentioned problems, and the transmission timing is freely changed to avoid repetition of collision when another transmission / reception system collides with transmission. To improve communication efficiency, repair communication timings that have shifted between the transmitting device and the receiving device, and shorten the time to wait for receiving when the receiving device does not yet have the timing to communicate. The purpose is to reduce power consumption in a circuit.

[0006]

In order to solve the above-mentioned problems, a transmitting / receiving system according to the present invention comprises a first timer having a constant period T1.
A first timer means for outputting an immer signal,
Is counted as one unit, and the count value N
When the maximum count value Nmax is counted, the initial value N1 (where
First counting means for initializing to N1 = 1) and the counted value
For transmission based on when has reached a predetermined value Nx.
To determine the communication timing and change the communication timing
Transmission control means for transmitting a transmission signal including the count value.
And the second timer signal of the fixed period T2
A second timer means for outputting the second timer signal;
Number as one unit, and the maximum count value Mmax of the count value M
(Where T1 × Nmax = k × T2Mmax (k is a natural number)
Initialized to the initial value M1 (here M1 = 1)
A first counting means for counting the count value M and a count value Mx (this
Here, based on when Mx = k (Nx-1) +1)
Waiting for a transmission signal from the transmission device for a predetermined time
While the transmission signal is being received during the standby operation.
Receiving control means for performing the receiving process when the
The second timer means and the first timer
Synchronize with the immersion means and include
According to the value of the counted value N, the counted value M is calculated as M = k.
The next standby operation timing is reset as (N-1) +1.
Comprising a timing synchronization means for setting, the transmission device
The communication timing synchronized with the receiving device and the next communication timing
It changes the time interval from the communication timing .

[0007] The reception control means of the receiving device may be a transmitting device.
From the last reception of the transmission signal from
After a predetermined time, which is the time interval for transmitting to the receiving device,
Continuously waits for transmission signal when it cannot receive
What to do .

Further , the first timer means of the transmitting apparatus and the receiving means
Synchronization of communication timing with the second timer means of the communication device
In order to create, the transmission control means of the transmission device is the first
The transmission operation is performed when the count value N of the counting means changes, and
The reception control means of the receiving device performs a standby operation for the transmission signal.
It is performed continuously.

[0009] Furthermore, the transmission device and the reception device are synchronized.
When changing the communication timing time,
The transmission control means of the transmission device changes the maximum count value Nmax.
And sends the changed maximum count value Nmax.
Receiving apparatus that transmits the transmission signal and receives the transmission signal.
The timing synchronization means of the device includes the
Depending on the value of the maximum count value Nmax, the maximum value of the second
Change large count value Nmax to Mmax = T1 / T2 / k × Nmax
By doing so, the next standby operation timing is reset .

In addition, transmission control means for changing the maximum transmission frame value Nmax based on the time when the transmission frame value N has changed to the predetermined value Nx and transmitting a transmission signal including the value of the maximum transmission frame value Nmax is provided. And a maximum receiving frame value Mma
x is the maximum transmission frame value N contained in the transmission signal.
It is provided with reception control means for changing to the value of max.

[0011]

With the above arrangement, the transmitting apparatus transmits the transmission frame value N by including it in the transmission signal. The reception device receives the transmission frame value N from the transmission device, changes the reception frame value M to this value, restarts the second timer unit after time t2, and changes the next communication timing.

[0012] Transmission data is periodically transmitted from the transmission device. The receiving apparatus continuously performs a standby operation of the transmission signal when the transmission signal cannot be received for t3 or more after receiving the transmission signal from the transmission apparatus last, and receives the transmission frame value N from the transmission apparatus and converts the reception frame value M into the reception signal. Change to this value and restore the communication timing.

The receiving apparatus which does not yet have the communication timing continuously performs the operation of waiting for the transmission signal from the transmitting apparatus, receives the transmitting frame value N from the transmitting apparatus, and changes the receiving frame value M to this value. Then, after the time t2, the operation of the second counting means is started. The communication timing is thus established.

[0014] The transmitting apparatus transmits the signal including the maximum transmission frame value Nmax in the transmission signal. The receiving apparatus receives the maximum transmission frame value Nmax from the transmission apparatus and receives the maximum reception frame value M
Change max to this value and change the next communication timing.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. By connecting the transmitting device to the gas water heater and the receiving device to the remote controller, the operation state of the gas water heater is monitored on the liquid crystal screen of the remote controller. FIG. 1A shows a transmitting device, and FIG. 1B shows a receiving device. The transmission device 1 of FIG. 1A is configured as follows. A first timer means 2 for cyclically outputting a first timer signal 2a having a constant period T (for example, T = 1 second), and counting the transmission frame value N based on the first timer signal 2a; The count value N is a predetermined value Nx
(For example, when Nx = 1), the transmission timing signal 3
a and the first counting means 3 for outputting the transmission frame value N (3b) at that time, and the first counting means 3 outputs the value when the transmission frame value N reaches the maximum value Nmax (for example, Nmax = 6). It is initialized to N1 (for example, N1 = 1) in the next counting operation. Further, a signal generating means 4 for outputting an information signal 4a such as an operation state signal of the gas water heater, the information signal 4a from the signal generating means 4 is inputted, and the necessity of transmission is determined from the content thereof, and the necessity of transmission When there is a request or when the polling request signal 10a is input, the transmission request signal 5a
The transmission determination means 5 outputs a transmission data signal 5b and the transmission request signal 5a. When the transmission request signal 5a is input, the transmission operation starts based on the transmission timing signal 3a, and the transmission frame value (3b) and the preamble are transmitted to the data signal 5b. A transmission control means 6 for outputting a transmission signal 6a and a transmission power control signal 6b to which a signal, a transmission error check code and the like are added, a transmission circuit 7 for converting the transmission signal 6a into a radio wave signal 7a and transmitting it from a transmission antenna 9; Power is supplied to the transmission circuit 7 by the transmission power control signal 6b from the transmission control means 6 (8
The transmission power control means 8 controls a), and periodically outputs a polling request signal 10a to the transmission determination means 5 to transmit a polling signal to the transmission device.

In FIG. 1B, the receiving device 11 is configured as follows. A second timer means 12 for generating a second timer signal 12a having a constant period T (for example, T = 1 second); counting the received frame value M based on the second timer signal 12a; Is a predetermined value Mx
The second counting means 13 that outputs the standby timing signal 13a when (for example, Mx = 1) and the second counting means 13 have the received frame value M at the maximum value Mmax (for example, Mmax = 6). Sometimes, it is initialized to M1 (for example, M1 = 1) in the next counting operation. Further, a reception control means 16 for outputting a reception power control signal 16b based on the standby timing signal 13a,
The receiving power control means 18 and the receiving control means 16 for receiving (b) and supplying power (18a) to the receiving circuit 17 perform a standby process for the received signal 16a from the receiving circuit 17, and obtain the transmission frame value N in the received data. (13b) is output. In addition, the radio signal 7 transmitted from the transmitting device 1
a for receiving the reception completion signal 15a and the reception data 15b from the reception control means 16 when the reception antenna 19 for catching "a" has been correctly received, and for driving the liquid crystal screen 14 of the remote control according to the contents thereof. The control signal generator 15 that outputs the signal 14a receives the transmission frame value N (13b), and receives the transmission frame value N (13b).
3, the timing synchronization means 20 for changing the received frame value M to this value. The timing synchronization means 20 starts counting at the same time as the reception completion signal 15a is input, and initializes the second timer means 12 after time t2. At the same time, it outputs a timing synchronization signal 20a for changing the reception frame value M of the second counting means 13 by one. Here, t2 time is 1
This is a constant value obtained by subtracting the length of the received data from the length of the frame.

Next, some signal timings in FIG. 1 will be described with reference to FIG. FIG. 2A shows the signal timing of the transmission device 1, and FIG.
= 1 second), (ii) shows the transition of the transmission frame value N, and the maximum frame value Nmax in this case is 4. That is, after the transmission frame value N increases to 1, 2, 3, and 4, it is again increased to 1 by the next counting operation.
The values from 1 to 4 change cyclically every second. (Iii) is a transmission timing signal 3a, which is output at the timing when the transmission frame value N changes from 4 to 1. (Iv) is a transmission signal 6a output from the transmission control means 6, and the transmission signal 6a contains the value of the transmission frame value N (ii) at this time (1 in this figure). When the necessity of transmission occurs, the transmission operation is started based on the transmission timing signal of (iii), and this time interval is constant at T × Nmax = 4 seconds.

FIG. 2 (b) shows the signal timing of the receiving device 11, wherein (i) shows the second timer signal 12a having a constant period T, and (ii) shows the transition of the received frame value M. After the received frame value M has increased from 1 to 4, it is returned to 1 again in the next counting operation. This reception frame value M is changed to the transmission frame value N included in the transmission signal 6a when the transmission signal 6a from the transmission device 1 is normally received. (Iii) is the standby timing signal 13
In this case, the count value N2 is output at the timing when the count value N2 changes from 4 to 1.

(Iv) is a reception power control signal 16a output from the reception control means 16, and supplies power to the reception circuit 17 based on the standby timing signal of (iii).
The timing at which the standby operation is performed is shown, and this time interval is constant at T × Mmax = 4 seconds.

FIG. 2C shows the signal timing of the whole transmitting / receiving system. In the drawing, (i) shows one of the information signals 4a from the signal generating means 4, and indicates that the state has changed from L level to H level at point A.

(Ii) is a transmission timing signal 3a output from the first counting means 3, which is cyclically input to the transmission control means 6 with a period T × Nmax = 4 seconds.

(Iii) shows a transmission signal 6a output from the transmission control means 6, which starts transmission based on the transmission timing signal 3a in response to a change in the information signal 4a at the point A. The transmission signal 6a includes a preamble signal portion used when the receiving device 11 catches a signal and an information signal portion to be transmitted. Further, the information signal section includes a frame synchronization code for representing the head of the signal, an ID code for identifying the transmission source and the transmission destination of the signal, a data section containing information to be transmitted, and whether or not the transmitted signal is incorrect. It consists of a transmission error check code for detecting the error.

(Iv) The second counting means 1 of the receiving device 11
3 shows the standby timing signal 13a output from the first counter 3 and is designed to be cyclically output at the same cycle T × Mmax = 4 seconds as the transmission timing signal 3a output from the first counting means 3. You.

(V) shows the intermittent reception power control signal 16b output from the reception control means 16 and the reception signal 16a received by the reception circuit 17 superimposed. The power supply to the reception circuit 17 by the reception power control signal 16b is started in synchronization with the standby timing signal 13a, but when there is no signal from the transmission device 1, the power is automatically turned off after a certain time (t1), When there is a signal, the power is turned off after receiving the signal.

(Vi) is one of the control signals 14a provided to the controlled device 14, and is output from the control signal generation means 15 after the reception control means 16 determines that the reception signal 16a is a correct signal. At point B, the content (change from L level to H level) of information signal 4a of transmitting apparatus 1 is transmitted.

Next, the operation and effect of the embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. (I) to (iii) in FIGS.
Indicates the communication timing in the transmitting device 1, and
(I) is a transition of the transmission frame value N, and numerical values from 1 to 4 appear cyclically. (Ii) is a transmission timing signal 3a, which is output at the timing when N changes from 4 to 1. (Iii) is a transmission signal 6a output from the transmission control means 6, and the transmission signal 6a transmits the transmission frame value N of (ii) at this time. (I
v) to (vi) show the communication timing in the receiving device 11, and (iv) shows the transition of the received frame value M, and numerical values from 1 to 4 appear cyclically similarly to the transmitting device. . This M changes to a transmission frame value N included in the transmission signal 6a when the transmission signal 6a is received. (V) is a timing at which power is supplied to the receiving circuit 17 and a standby operation is performed. (Vi) shows the transmission signal 6a received by the receiving circuit 17.

FIG. 3 shows a state in which the transmission device 1 has changed the communication timing. As shown in FIG. 3 (a), when it is detected that the transmission has collided with another transmission / reception system (the transition of the transmission frame is shown in vii), or when the reception apparatus cannot receive the data even if the transmission is performed many times, a plurality of transmissions are performed. May have the same communication timing.
At this time, the transmission control device 6 changes the transmission frame value N during transmission to change the communication timing. (I) and (iii)
), The transmission control means 6 changes the transmission frame value N of the first counting means 3 from 1 to 2 when transmitting the transmission signal 6a, and transmits this N (C).
point). The receiving device 11 receives the transmission signal 6a and changes the received frame value M from 1 to 2 (iv). Based on the changed communication timing, the reception power control means 18 supplies power to the reception circuit 17 at the timing (v) and starts a standby operation at a new communication timing, so that the reception power control means 18 communicates with another transmission / reception system (vii) at the communication timing. However, collisions are avoided.

When the transmission timing of the transmission device 1 and the transmission timing of the reception device 11 are shifted, if the transmission signal 6a is transmitted without changing the transmission frame value N, the transmission timing and the reception timing coincide with the conventional communication timing. Can be done. Therefore, if the transmission signal always includes the transmission frame value N or the maximum transmission frame value Nmax in the transmission signal, the reception timing is adjusted to the transmission timing every time the receiving device receives the transmission signal, so that the communication timing gradually shifts. Going can be reduced.

In FIG. 3B, when there are two or more data to be transmitted continuously, conventionally, it has been necessary to wait four seconds until the next communication timing. At this time, the transmission control device 6 changes the communication timing by increasing the transmission frame value N at the time of transmission, thereby increasing the communication efficiency. (I) and (iii)
As shown in (1), when transmitting the transmission signal 6a, the transmission control means 6 sets the value N of the transmission frame of the first counting means 3 to 4, and transmits this N. The receiving device 11 receives the transmission signal 6a and changes the received frame value M to 4 (iv). Based on the changed communication timing, the reception power control means 18 supplies power to the reception circuit 17 at the timing (v) and starts the standby operation at a new communication timing, so that the next communication timing is set to one second later. can do.

[0030] The transmitting device operates at least for a predetermined time t3.
The transmission is performed every time, and the reception frame value M on the receiving device side is periodically checked. When the transmission signal cannot be received for the time t3 or more since the last reception of the transmission signal from the transmission device, it is assumed that the communication timing between the transmission device and the reception device is shifted, and the reception device continuously performs the standby operation of the transmission signal. Then, the transmission frame value N is received from the transmission device, and the reception frame value M is changed to this value. As described above, a shift in the communication timing can be detected and corrected within a predetermined time.

FIG. 4 shows a state in which the receiving device 11 has started operation. The receiving device 11 has no communication timing, and cannot perform an intermittent standby receiving operation using a received frame. Thus, when initializing the communication timing between the receiving device and the transmitting device,
The transmission control means 6 does not wait for the transmission frame value N to reach a predetermined value (1 in the present embodiment), but performs the transmission operation based on the time when N is counted. For example, the transmitting device transmits a transmission frame value N every second for the first few seconds after it starts operating. (Vii) is a power supply 16a to the receiving circuit 17 by the receiving power control signal 16b, and the receiving device 11 continuously supplies power to the receiving circuit 17 until the first transmission signal 6a is received, so that the receiving circuit 17 can always receive. It is. Until the reception, the second counting means 13 is stopped, and the received frame value M (iv) is not counted. The receiving device 11 receives the transmission signal 6a, sets the received frame value M, and starts the operation of the second counting means 13 (point D). Since the communication timing has been established, the reception power control means 18 periodically supplies power to the reception circuit 17 as shown in (vii), and performs a standby operation every 4 seconds. Since the transmission operation is started when the transmission frame value N changes, the time for continuously supplying power to the reception circuit 17 may be at most the time interval T of the first timer means 2 = 1 second.

In this embodiment, the counting means counts +1. However, the same applies to counting -1. At this time, the value transmitted from the transmitting device 1 is the remaining value up to the communication timing. May be. The value to be transmitted may be a value obtained by adding arithmetic processing to the transmission frame value N, or may be a negative number.

In the above description, the value N of the transmission frame of the transmission device 1
Is transmitted, the maximum transmission frame value Nmax is transmitted, and the maximum reception frame value Mmax of the receiving device 11 is changed to the value of Nmax to speed up the communication timing.
It is possible to slow down. In FIG. 5, (i) to (iv) show the communication timing in the transmitting device 1,
(I) shows the maximum transmission frame value Nmax. (Ii) shows the transmission timing signal 3a (ii) at the timing when the transmission frame value N changes from Nmax to 1;
i) is output. (Iv) is a transmission signal 6a output from the transmission control means 6, and transmits the transmission signal 6a including the maximum transmission frame value Nmax. (V)-(viii)
Indicates communication timing in the receiving device 11. (V) shows the maximum received frame value Mmax, which is changed to the value of Nmax included in the transmission signal 6a when the transmission signal 6a is received. (Vi) shows the transition of the received frame value M. At the timing when the value changes from Mmax to 1, the power is supplied to the receiving circuit 17 to perform a standby operation (vii). (Vii) shows the transmission signal 6a received by the receiving circuit 17. (I) (ii) (ii
As shown in i), when transmitting the transmission signal 6a, the transmission control means 6 changes the maximum transmission frame value Nmax from 4 to 5, and transmits the value of Nmax (= 5).
The receiving device 11 receives the transmission signal 6a and changes the maximum received frame value Mmax (= 4) to the value of Nmax (= 5) (v). Based on the changed communication timing, the reception power control means 18 makes the reception circuit 1 at the timing shown in (vii).
7 and starts a standby operation at a new communication timing. In the case where a device is connected to the transmitting device and the operating state of the device is monitored on the receiving device side, according to the operating state of the connected device, for example, while the device is operating, it is desired to immediately monitor a state change, so the maximum transmission frame value Nmax, Since it is desired to reduce the maximum reception frame value Mmax to shorten the communication interval and to reduce the power consumption of the receiving device while the device is stopped, Nmax,
By increasing Mmax, it is possible to reduce the number of times that the power of the receiving circuit 17 of the receiving device 11 is turned on.

In this embodiment, the period T1 of the first timer means provided in the transmitting device and the period T2 of the second timer means provided in the receiving device are T1 = T2 = T.
Even if the relationship is T1 = kT2 (k is a natural number), the same effect can be obtained if M = kN and Mmax = kNmax in the receiving device.

As described above, according to the embodiment, the present invention can freely change the timing of communication to avoid repetition of collision when transmission conflicts with another transmission / reception system.
Increases communication efficiency when transmitting continuously more than once, repairs communication timing that has shifted between the transmitting device and receiving device, and establishes timing when the receiving device does not have the timing to communicate yet. Therefore, it is possible to reduce the power consumption in the receiving circuit by shortening the time for waiting for reception.

[0036]

As described above, in the transmitting / receiving system of the present invention, both the transmitting device and the receiving device are provided with the timer means for generating a cyclic timer signal having the same cycle and the counting means, and Since the configuration is such that the frame value N or the maximum transmission frame value Nmax is transmitted to change the reception frame value M or the maximum reception frame value Mmax of the receiving device, the following effects are obtained.

(1) When transmission collides with another transmission / reception system having the same communication timing, the communication timing can be changed to avoid collision with another transmission / reception system.

(2) The communication timing can be changed, such as when transmitting two or more times continuously, to speed up the next communication timing to increase the communication efficiency.

(3) When communication timing is shifted between the transmitting device and the receiving device, this can be detected within a fixed time and repaired.

(4) When the receiving device does not yet have the timing for transmission, the time for continuously supplying power to the receiving circuit for establishing communication timing is short.

(5) When it is not necessary to frequently communicate, for example, the communication timing is changed to delay the next communication timing, thereby reducing the number of power-on times of the receiving circuit.

[Brief description of the drawings]

FIG. 1A is a configuration diagram of a transmission device of a transmission / reception system according to a first embodiment of the present invention. FIG. 1B is a configuration diagram of a reception device of the transmission / reception system.

FIG. 2A is a timing chart of a part of a signal transmitted by a transmitting device of the system; FIG. 2B is a timing chart of a signal of a signal transmitted by a receiving device of the system; FIG.

FIG. 3 (a) Partial signal timing diagram of a transmission / reception system according to a second embodiment of the present invention. (B) Partial signal timing diagram of a transmission / reception system according to a second embodiment of the present invention.

FIG. 4 is a partial signal timing diagram of a transmission / reception system according to a third embodiment of the present invention.

FIG. 5 is a partial signal timing diagram of a transmission / reception system according to a fourth embodiment of the present invention.

FIG. 6 is an external perspective view showing an installation state when the transmission / reception system is used for a gas water heater.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 transmission device 2 first timer means 3 first counting means 6 transmission control means 7 transmission circuit 11 receiving device 12 second timer means 13 second counting means 16 reception control means 17 reception circuit 18 reception power control means 20 Second timing synchronization means

Claims (4)

(57) [Claims] 1. A a first timer means for outputting a first timer signal having a constant period T1, the first timer signal is counted as one unit, maximum count Nmax of the count value N
After counting, the initial value is initialized to N1 (here, N1 = 1).
First counting means for converting the count value N to a predetermined value Nx
The transmission timing for transmitting based on when
Includes count values for determining and changing communication timing
A transmission device comprising transmission control means for transmitting a transmission signal
And a second timer signal for outputting a second timer signal having a constant period T2.
Timer means and this second timer signal as one unit
Counting, and the maximum count value Mmax of the count value M (here, T1
× Nmax = k × T2XMmax (k is a natural number)
First, a filter is initialized to an initial value M1 (here, M1 = 1).
Counting means, and the count value M is a predetermined value Mx (where Mx = k
(Nx-1) +1), the transmission device
The operation of waiting for the transmission signal from the
In the case where the transmission signal is received during the standby operation,
Indicates the reception control means for performing the reception processing, and the reception time.
Based on the second timer means and the first timer means
And synchronized with the transmission signal
According to the value of the count value N, the count value M is calculated as M = k (N-1).
+1 to reset the next standby operation timing
The transmitting device and the receiving device
Communication timing synchronized with the device and the next communication timing
Transmission / reception system that changes the time interval between 2. The receiving control means of the receiving device receives a signal from the transmitting device.
The transmitting device has received the transmission signal since the last reception of the transmission signal.
Reception after a specified time, which is the time interval for transmission to the device
The transmission / reception system according to claim 1 , wherein a standby operation of a transmission signal is continuously performed when the transmission cannot be performed . 3. The first timer means of the transmitting device and the receiving device.
Synchronization of communication timing with the second timer means
The transmission control means of the transmission device
The transmission operation is performed when the count value N of the stage changes, and the reception is performed.
The reception control means of the device continuously performs the standby operation of the transmission signal.
The transmission / reception system according to claim 1, wherein 4. A communication type synchronized between a transmitting device and a receiving device.
When changing the time of
Transmission control means for signal devices when you change the maximum count Nmax
The value of the maximum count value Nmax changed together is used as the transmission signal.
Of the receiving device that has transmitted and received the transmission signal.
Means for synchronizing the maximum count included in the transmission signal
The maximum count value of the second counting means according to the value of the value Nmax
Changing Nmax to Mmax = T1 / T2 / k × Nmax
2. The next standby operation timing is reset by the above operation.
Mounting sending and receiving system.