JP2001102981A - Radio repeating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repeater which can suppress the power consumption of a receiver and a transmitter, expand the communication area of a system, and improve the quality of a radio communication for a system wherein the transmit signal sent by a battery-driven transmitter at irregular time is received at irregular time by a battery-driven receiver operating by intermittent reception. SOLUTION: This radio transmission and reception system comprises a transmitter 1 and a receiver 2 which are both portable, and a repeater 51 receives a signal sent by the transmitter 1 and sends the received signal 57 to the receiver 2 repeatedly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio relay apparatus and system in a transmission / reception system having an intermittent reception function.

[0002]

2. Description of the Related Art Conventionally, in a system in which a customer calls a service clerk, for example, as used in a restaurant or the like, a calling transmitter and a portable device that the service clerk can carry are used. And a type receiver. Since the transmitter and the receiver are generally driven by a battery, as a method of reducing power consumption, the receiver side always performs a reception operation, that is, an operation for detecting the presence or absence of a transmission signal, in a standby state. Instead, an intermittent reception method is employed in which the operation of detecting the presence or absence of a transmission signal is repeated at certain time intervals.

[0003] Here, a transmission signal for a customer to call a receptionist is transmitted irregularly in time, so that the portable receiver cannot know the transmission timing of the transmission signal. Therefore, as a necessary condition for performing intermittent reception and reliably detecting the presence or absence of a transmission signal that is transmitted irregularly in terms of time, at least within the transmission signal duration from the start of transmission to the end of transmission. One or more times, an operation of detecting the presence or absence of a transmission signal is performed.

[0004] Hereinafter, a conventional technique will be described with reference to FIGS.
Explanation will be made using 0. FIG. 7 is a schematic diagram of the system,
FIG. 8 is a block diagram of the transmitter. FIG. 9 is a block diagram of the receiver, and FIG. 10 is a diagram showing a timing chart.

As shown in FIG. 7, a conventional system includes a transmitter 1 for transmitting a transmission signal 3 for a customer to call a customer service clerk and a reception service clerk for receiving the transmission signal 3 transmitted by the customer. And a portable receiver 2.
Note that both the transmitter 1 and the receiver 2 are battery-driven.

As shown in FIG. 8, a transmitter 1 includes a transmitting antenna 4, a transmitting unit 5, and a local oscillating unit 10 for generating a local oscillating signal 12 to be supplied to the transmitting unit 5 (this is an arbitrary transmission signal). 3 comprises a multi-channel PLL (Phase-Locked Loop) circuit or a fixed channel oscillation circuit capable of selecting three channels) and the transmission signal 3 by setting the channel of the transmission signal 3 or pressing the transmission signal 3 by the customer. I / O unit 9 composed of a switch or the like for transmitting
1 and ON / OFF of the transmitter / local oscillator drive power supply 14
The control unit 8 includes an ON / OFF unit 15 for performing the operation.

The control unit 8 includes a CPU, a memory, and the like for controlling the sequence of the transmitter 1, and receives an I / O signal 7 from the I / O unit 9 so as to transmit a transmission signal 6. Then, the control section 8 controls the ON / OFF section 15 to turn on the transmission section / local oscillation section drive power supply 14. The control unit 8 outputs a transmission signal 6 to the transmission unit 5, and the control unit 8 also outputs a channel setting signal 13 when the local oscillation unit 10 is configured by a multi-channel PLL circuit.

[0008] As shown in FIG.
And a local oscillator 24 for generating a local oscillation signal 23 to be supplied to the receiver 22 (this is a multi-channel system capable of selecting a channel according to the channel setting of the transmission signal 3). ) Or a fixed channel oscillating circuit.) And the transmitter 1
, An I / O unit 19 composed of an incoming call notifying unit capable of notifying the receiver 2 of a transmission signal 3 transmitted from the I / O unit in a sound, vibration or visual manner, a power supply unit 21, a receiving unit / local oscillation ON for turning on / off the unit drive power supply 26
/ OFF unit 27 and control unit 20.

The control unit 20 includes a CPU, a memory, and the like for controlling the sequence of the receiver 2. The control unit 20 detects a transmission signal 3 transmitted from the transmitter 1 at irregular intervals. ON / OF at regular time intervals until
The receiving unit / local oscillation unit driving power supply 26 is
N, and when the transmission signal 3 is detected, data acquisition of the transmission signal 3 is started immediately. Also,
The control unit 20 determines that the local oscillation unit 24 has a multi-channel P
When configured by an LL circuit, it outputs a channel setting signal 25. Then, the control unit 20 controls the receiving unit 2
2 and decodes the received signal 17 output to the control unit 20 to notify the I / O unit 19 of the incoming call. Further, the control unit 20 has a memory for registering the ID of each transmitter in advance so that the transmitter can be distinguished, and I / O determines from which transmitter the transmission signal 3 is emitted. The information can be displayed and displayed on the O section 19.

Here, the registration of the transmitter is performed by outputting an I / O signal 18 for shifting to the registration mode from the I / O unit 19 to the control unit 20 and setting the receiver in the registration mode state. It controls the ON / OFF unit 27 to turn on the receiving unit / local oscillation unit driving power supply 26. Then, the transmission signal 3 is transmitted from the transmitter 1 to be registered, and the transmission signal 3 is received by the receiver 2, so that the receiver 2 of the transmitter 1
Registration to is performed.

FIG. 10 is a timing chart (28) of ON / OFF of the driving power of the transmitter / local oscillator, the timing chart (29) of the transmission signal described above, and the ON / OFF of the driving power of the receiver / local oscillator. An OFF timing chart (30) and a timing chart (31) of a reception operation for detecting a reception signal and taking in data are shown. In the ON / OFF timing chart (28) of the transmission unit / local oscillation unit drive power supply and the transmission signal timing chart (29), for example, the I
When a call button or the like corresponding to the / O unit 9 is pressed, the transmission unit / local oscillation unit driving power supply 14 is turned on as described above,
The transmission signal 36 is transmitted from the transmitter 1. Timing at which the power supply for the transmitter / local oscillator drive 14 is turned on and the transmission signal 3
The rise time 48 of the transmission unit / local oscillation unit, which is the difference between the times at which the transmission of No. 6 starts, corresponds to the lock-up time when the local oscillation unit 10 is configured by a PLL circuit. The transmission signal 36 includes, for example, an unmodulated carrier 33 and four data data A 38, data B 39, data C 40, and data D 41. Data A
38, data B39, data C40, and data D41 are all the same data and include ID information of the transmitter 1. In the timing chart (30) of ON / OFF of the driving power supply for the receiver / local oscillator and the timing chart (31) of the reception operation for detecting the reception signal and taking in the data, as described above, until the transmission signal 36 is detected,
In the standby state, the receiving / local oscillating unit driving power supply 26 is turned on / off at a constant receiving / local oscillating unit driving power ON / OFF cycle 43, and a transmission signal detection 45 is performed.
The receiver / local oscillator drive power ON / OFF cycle 43 and the transmission signal detection cycle 46 are the same.

As described above, the transmission signal detection cycle 46 is
It must be shorter than the transmission signal duration 34, and the transmission signal 36 is detected and the data acquisition 50
At least data A38 and data B3
9. It is necessary to take in any one of data C40 and data D41. Transmission signal duration 34, unmodulated carrier transmission time 37, data transmission time 35 (data is 4
), The relationship between the transmission signal detection cycle 46 and the data fetch time 49 is specifically expressed by the following equation. Transmission signal detection cycle 46 <transmission signal duration 34-data transmission time 35 = unmodulated carrier transmission time 37 + 3 × data transmission time 35 data acquisition time 49> unmodulated carrier transmission time 3
7 + data transmission time 35 In general, when the transmission signal 36 is composed of the unmodulated carrier 33 and N data, the transmission signal detection cycle 46 <the transmission signal duration 34−the data transmission time 35 = unmodulated Carrier transmission time 37+ (N−
1) × Data transmission time 35 ・ Data acquisition time 49> Unmodulated carrier transmission time 3
The relationship of 7 + data transmission time 35 holds.

[Problems to be Solved by the Invention] In the above-mentioned conventional system, as shown in FIG. 10, the transmission signal detection cycle 46 <the transmission signal duration 34-the data transmission time 35 = the unmodulated carrier transmission time 37+ (N- 1) × Data transmission time 35 Data acquisition time 49> Unmodulated carrier transmission time 37 + Data transmission time 35 The operation is performed at the timing, and the transmission signal 3 transmitted from the transmitter 1 irregularly in time is received by the receiver 2 It has the function of being able to receive data.

However, in the conventional system as described above, since the power supply of both the transmitter 1 and the receiver 2 is composed of a battery, it is required to minimize power consumption. Therefore, in order to further reduce the power consumption of the transmitter 1 and the receiver 2, the transmission unit
The purpose is to reduce the local oscillator drive power ON time 32 and the receiver / local oscillator drive power ON time. For this purpose, in the transmitter 1, the transmission signal duration 34 is shortened, or the transmitter / local oscillator rise time 48
, Or in the receiver 2,
In other words, the frequency of the transmission signal detection 45 is reduced, that is, the transmission signal detection cycle 46 is lengthened, or the data acquisition time 49, which is the time from the detection of the transmission signal 36 to the end of data acquisition, is shortened. -There is a method of shortening the rise time 47 of the local oscillator. Therefore, in consideration of the above relational expression, first, when considering a method of increasing the transmission signal detection period 46 as a method of reducing the power consumption of the receiver 2, the unmodulated carrier transmission time 37 is increased or the data transmission time 35 is reduced. Can be lengthened.

[0015]

However, as a result, the minimum time required for the data fetching time 49 must be large, so that the power supply ON time 42 for the receiving / local oscillating unit becomes longer and the transmission signal Duration 34
, The transmitter / local oscillator drive power ON time 3
2 also increases. As another method, the number of data included in the transmission signal 36 is increased from four shown in the prior art to, for example, eight, and the transmission signal detection period 46 <the transmission signal duration 34-the data transmission time 35 = unmodulated carrier transmission time 37 + 7 × data transmission time 35 data acquisition time 49> unmodulated carrier transmission time 3
The relationship of 7 + data transmission time 35 holds. The transmission signal detection period 46 is longer than the case where the number of data is four, and the data acquisition time 49
Can be realized without increasing the number of data. However, the transmission signal duration 34 is increased by an amount corresponding to the increase in the number of data, so that the transmission unit / local oscillation unit driving power ON time 32 is increased and the power consumption of the transmitter 1 is increased. There is such a problem.

The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to intermittently receive a transmission signal 3 transmitted from a battery-driven transmitter 1 at irregular intervals. In a system in which a transmission signal 3 transmitted from the transmitter 1 is received at irregular intervals by the battery-operated receiver 2 operating at the same time, the power consumption of both can be suppressed and the communication area of the system can be reduced. It is an object of the present invention to provide a repeater capable of expanding the communication quality and improving the quality of wireless communication.

[0017]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a wireless communication system comprising a transmitter and a receiver, both of which are portable. The system is characterized in that a signal transmitted by a transmitter is received by a repeater and the received signal is repeatedly transmitted to a receiver.

According to the second aspect of the present invention, the PHS
(Personal Handy-Phone System) or the like, wherein a synchronization signal is transmitted from the repeater to the receiver, and the receiver sets the reception timing according to the synchronization signal.

According to a third aspect of the present invention, the communication between the repeater and the receiver is limited to a fixed channel.

[0020] The invention according to claim 4 is characterized in that the repeater has a function of storing the incoming call history.

According to the fifth aspect of the present invention, when the transmission and reception channels are the same, the repeater has a carrier sense function to check for the presence or absence of a transmission signal from the transmitter, and to reduce interference of radio waves. It has a function of transmitting to a receiver at a timing.

According to the sixth aspect of the present invention, when a signal transmitted from a transmitter is distinguished from a combined signal received by the repeater and transmitted from the repeater on the receiver side. , Wherein the receiver discards the combined signal received within a predetermined time (variable length) after receiving the signal.

According to the present invention, when there are a plurality of transmitters and receivers, the repeater has a transmitter registration function for distinguishing the plurality of transmitters. And transmitting the registration information of the transmitter registered in the repeater from the repeater to all the receivers at the same time.

According to an eighth aspect of the present invention, the repeater selects an arbitrary receiver from a plurality of receivers and transmits the selected one.

[0025]

1 to 3 and 8 to 10 for a first embodiment of a wireless relay system according to the present invention, and FIGS. 1 to 10 for a second embodiment. 3, 4 and 8 to 10, FIGS. 3 and 4 and 8 to 9 for the third embodiment, FIGS. 1 and 2 for the fourth embodiment, and FIGS. 1 and 2 and FIG. 5 for the sixth embodiment, and FIG. 2 for the sixth embodiment.
FIGS. 3, 6, and 9 will be described in detail with reference to FIGS. 1 and 2 for the seventh embodiment, and FIGS. 1 and 2 for the eighth embodiment.

FIG. 1 shows a system in which a customer, for example, used in a restaurant or the like calls a service clerk. Both of them are a battery-driven transmitter and a receiver, and commercial power is supplied from the outside. It is a schematic diagram of a system constituted by a repeater. FIG. 2 is a block diagram of the repeater. FIG. 3 is a diagram illustrating an example in which the data included in the transmission signal transmitted from the transmitter received by the repeater is duplicated in the repeater to generate a transmission signal transmitted from the repeater to the receiver, and the transmission signal is transmitted from the repeater to the receiver. FIG. FIG. 4 is a timing chart for further transmitting a synchronization signal from the repeater in FIG.
FIG. 5 is a timing chart in which the channel of the transmission signal transmitted from the transmitter and the channel of the transmission signal transmitted from the repeater in FIG. FIG. 6 shows that the transmission signal transmitted from the transmitter and the transmission signal transmitted from the repeater in FIG. 1 have the same channel, and both the transmission signal from the transmitter and the transmission signal from the relay are transmitted to the receiver. It is a figure showing the state where it has arrived.

[First Embodiment] A first embodiment will be described in detail with reference to FIGS. 1 to 3 and FIGS. In the present embodiment, by incorporating the repeater 51 into a conventional system including the transmitter 1 and the receiver 2, the power consumption of the transmitter 1 and the receiver 2 can be suppressed and the communication area of the system can be expanded. It is an object.

FIG. 1 shows a system for a customer to call a service clerk, for example, as used in a restaurant or the like. The transmitter 1 and the receiver described in FIGS. 8 and 9 are both battery-powered. FIG. 2 is a schematic diagram of a system including a second power supply 2 and a repeater 51 to which commercial power is supplied from the outside. An upstream transmission signal 52 is transmitted from the transmitter 1 to the repeater 51, and a downstream transmission signal 53 is transmitted from the repeater 51 to the receiver 2.

FIG. 2 is a block diagram of the repeater 51. Receiving antenna 5 for receiving uplink transmission signal 52
4, a receiving section 58, a transmitting antenna 55 for transmitting the downlink transmission signal 53, a transmitting section 66, and a local oscillating section 67 for generating a local oscillation signal 70 to be supplied to the transmitting section 66 and the receiving section 58 (this Is composed of a multi-channel PLL circuit or a fixed-channel oscillation circuit capable of arbitrarily selecting a channel according to the channel settings of the uplink transmission signal 52 and the downlink transmission signal 53), and commercial power is supplied from the outside. Power supply unit 68 and its outlet 6
9. Channel setting of the repeater 51 or an uplink transmission signal 52 transmitted from the transmitter 1 when the customer presses the switch 51 can be received by the repeater 51 to inform which transmitter 1 is called, for example, 7 segments And the like, and an I / O unit 61 composed of an incoming call reporting means and a transmission unit driving power supply 65 are turned ON / OF.
ON / OFF unit 64 for turning on and off, and an ON / OFF unit 62 for turning on / off the receiving unit driving power supply 56.
And a control unit 60 including a CPU, a memory, and the like for controlling the sequence of the repeater 51.

The controller 60 outputs a channel setting signal 59 when the local oscillator 67 is constituted by a multi-channel PLL circuit. Since the power of the repeater 51 is supplied from the outside, continuous reception can be performed. Unlike the battery-driven receiver 2, the control unit 60 controls the reception unit driving power supply 56 to always be ON. However, the receiving unit 58 is always in a standby state for detecting the uplink transmission signal 52, and the control unit 60 immediately starts capturing data of the uplink transmission signal 52 as soon as the uplink transmission signal 52 transmitted at irregular intervals is detected. . The control unit 60
Decodes the received signal 57 output from the receiving unit 58 to the control unit 60 and notifies the I / O unit 61 of the incoming call.
The control unit 60 decodes the received signal 57 output from the receiving unit 58 to the control unit 60, duplicates the data, and generates a transmission signal 63 to be transmitted to the receiver 2.

The control section 60 controls the ON / OFF section 64 to turn on the transmission section drive power supply 65 and outputs the transmission signal 63 to the transmission section 66. Further, the control unit 60 has a memory for registering the ID of each transmitter in advance so as to be able to distinguish the transmitters, and which transmitter has transmitted the uplink transmission signal 52 at the time of an incoming call. Can be displayed on the I / O unit 61 to know it. Registration of the transmitter in the repeater 51 is performed by the I /
When the I / O signal 71 for shifting to the registration mode is output from the O unit 61 to the control unit 60 and the repeater 51 is set to the registration mode state, the control unit 60 sends the ON / OFF unit 62 a receiving unit driving power supply 56. Is turned on, and the transmitter 1 to be registered transmits the uplink transmission signal 52 and receives it, whereby the transmitter 1 is registered. It is assumed that registration between the transmitter 1 and the receiver 2 has already been performed by the above-described method.

FIG. 3 is a diagram showing an example in which the data included in the upstream transmission signal 87 transmitted from the transmitter 1 and received by the relay 51 is duplicated in the relay 51, and the downstream transmission signal 97 is generated. 6 is a timing chart for transmitting to the second embodiment. FIG. 3 is a timing chart of ON / OFF of the transmitter / local oscillator driving power supply of the transmitter (72), a timing chart of the uplink transmission signal (73), and the uplink transmission signal of the repeater. It is a timing chart of a reception operation which takes in and detects data (74).
It is a timing chart of a downlink transmission signal (75).
And ON / OF of the receiver / local oscillator drive power supply of the receiver
(76), which is a timing chart of F, and (77), which is a timing chart of a receiving operation of detecting a downlink transmission signal and taking in data by a receiver.

FIG. 7 is a timing chart (72) of ON / OFF of the power supply for driving the transmitter / local oscillator of the transmitter 1.
In the timing chart (73) of the uplink transmission signal,
For example, when the customer presses a call button or the like corresponding to the I / O unit 9 of the transmitter 1 to call the service clerk, the transmission unit / local oscillation unit driving power supply 14 is turned on as described above, and the upstream transmission signal 87 is transmitted. Is done. The transmitter / local oscillator rise time 101, which is the difference between the timing at which the transmitter / local oscillator drive power supply 14 is turned on and the time at which transmission of the uplink transmission signal 87 starts, is such that the local oscillator 10 is constituted by a PLL circuit. Is equivalent to the lock-up time.

The upstream transmission signal 87 includes, for example, an unmodulated carrier 79 and four data A83 and B8.
4, data C85 and data D86.
Data A83, Data B84, Data C85, Data D
86 has the same data and the ID of the transmitter 1
Contains information. Further, in the timing chart (74) of the reception operation of detecting the uplink transmission signal and taking in the data of the repeater, and in the timing chart (75) of the downlink transmission signal, in the repeater 51, the receiving unit 58 Since the power of the receiver 51 is supplied from the outside, unlike the battery-driven receiver 2, the receiver driving power supply 56 is always ON and the upstream transmission signal 87 is detected until the upstream transmission signal 87 is detected. It is in a standby state. When detecting the uplink transmission signal 87 that is transmitted irregularly in time, the control unit 60 immediately starts the data capture 88 of the uplink transmission signal 87. The repeater duplicates the data included in the captured upstream transmission signal 87 and connects a plurality of the data after the data D86, for example, the unmodulated carrier and the data D86.
Although the number of data A83, data B84, data, and the number of data are eight, it is needless to say that the number of data is not limited to eight.

Further, it is a timing chart of the ON / OFF of the power supply for driving the receiving section / local oscillation section of the receiver (76).
And (77) which is a timing chart of a reception operation in which a receiver detects a downlink transmission signal and captures data.
In the receiver 2, as described above, until the downlink transmission signal 97 is detected, that is, in the standby state, the receiver / local oscillator drive power supply 26 is turned on / off at a constant receiver / local oscillator drive power ON / OFF cycle 99. Then, downlink transmission signal detection 102 is performed. Receiver / local oscillator drive power ON /
The OFF cycle 99 and the downlink transmission signal detection cycle 105 are the same.

As described above, the downlink transmission output detection period 10
5 must be shorter than the downlink transmission signal duration 91,
Further, after detecting the downlink transmission signal 97 and shifting from the standby state to the data acquisition 106, at least the data A
83, data B84, data C85, data D86, data E93, data F94, data G95, data H9
No. 6 needs to be taken in. Downlink transmission signal duration 91, unmodulated carrier transmission time 82,
The relationship between the data transmission time 81 (eight data pieces), the downlink transmission signal detection cycle 105, and the data acquisition time 103 is specifically expressed by the following equation as described above. Downlink transmission signal detection cycle 105 <downlink transmission signal duration 91-data transmission time 81 = unmodulated carrier transmission time 8
2 + 7 × data transmission time 81 ・ Data acquisition time 103> non-modulation carrier time 82
+ Data transmission time 81 In general, the uplink transmission signal 87
The number of data of the uplink transmission signal 87 is multiplied by M in the repeater 51 and the unmodulated carrier 9
2 and a downlink transmission signal detection cycle 105 of the receiver 2 when the downlink transmission signal 97 composed of N × M data is generated.
And the data fetch time 103 is given by the following equation. -Downlink transmission signal detection cycle 105 <unmodulated carrier transmission time 82 + (N x M-1) x data transmission time 81-Data acquisition time 103> unmodulated carrier time 82
+ Data transmission time 81 Further, as described above, in the conventional system that does not use the repeater 51, transmission signal detection cycle 46 <unmodulated carrier transmission time 37
+ (N-1) × data transmission time 35 ・ data fetch time 49> unmodulated carrier time 37+
Data transmission time 35 When comparing the two, the difference between the downlink signal detection period 105 and the conventional transmission signal detection period 46 in the receiver 2 of the system using the repeater 51 is the unmodulated carrier transmission time 37 and the unmodulated carrier transmission. Assuming that the time 82 is equal and the data transmission time 35 is equal to the data transmission time 81, N ×
(M−1) × data transmission time 35, and the system incorporating the repeater 51 can have a longer cycle. Also, there is no difference between the data fetch time 49 and the data fetch time 103.

Thus, by incorporating the repeater 51 into the system, the uplink transmission signal duration 80 of the transmitter 1 is not changed, that is, the power consumption of the transmitter 1 is not increased, and The downlink signal detection cycle 105 of the receiver 2 can be increased without changing the data acquisition time 103. That is, the power consumption of the receiver 2 can be suppressed, and the communication area of the system can be expanded by incorporating the repeater 51 into the system.

[Second Embodiment] A second embodiment will be described with reference to FIGS. 1 and 2, FIG. 4, and FIGS.
Each will be described in detail. This embodiment aims at suppressing power consumption by transmitting a synchronization signal from the repeater 51 in the system of the first embodiment described above.

In FIGS. 1 and 2 described above,
Downlink transmission signal 53 including a synchronization signal is transmitted from repeater 51 to receiver 2. Further, the control unit 60 controls the transmission unit driving power supply 65 so that the synchronization signal is transmitted at a constant cycle.
Control. FIG. 4 is a block diagram showing the configuration of FIG.
3 shows a timing chart for transmitting a synchronization signal 124 from the first embodiment. In FIG. 4, (108) is a timing chart of an uplink transmission signal, and (109) is a timing chart of a reception operation of detecting an uplink transmission signal of a repeater and taking in data. (110) which is a timing chart, and (111) which is a timing chart of ON / OFF of a driving power supply for a receiver and a local oscillator of a receiver, and a timing of a receiving operation in which a receiver detects a downlink transmission signal and takes in data. (112) which is a chart is shown.

In (108) of the timing chart of the upstream transmission signal, for example, when the customer presses a call button or the like corresponding to the I / O unit 9 of the transmitter 1 to call the customer service clerk, as described above, The local oscillation unit driving power supply 14 is turned on, and an upstream transmission signal 115 is transmitted. The uplink transmission signal 115 includes, for example, an unmodulated carrier 148, data A116, data B117, data C118, and data D119. Data A116, data B117, data C118, and data D119 all contain the same data and include ID information of the transmitter 1. Also, in the timing chart (109) of the receiving operation for receiving and transmitting data of the uplink transmission signal of the repeater, and in the timing chart (110) of the downlink transmission signal including the synchronization signal, in the repeater 51, the receiving unit 58 is a relay. Since the power of the receiver 51 is supplied from the outside, unlike the battery-driven receiver 2, the receiver driving power supply 56 is always ON, and the upstream transmission signal 115 is output until the upstream transmission signal 115 is detected. It is in a standby state to detect.

Upon detecting the uplink transmission signal 115 transmitted irregularly in time, the control section 60 immediately starts the data acquisition 123 of the uplink transmission signal 115. The repeater 51 reproduces the data contained in the received upstream transmission signal 115, and transmits the unmodulated carrier 128 and the data A11.
6, data B117, data C118, data D119
Is generated. Transmission section 6
6 transmits a synchronization signal at a constant synchronization signal transmission period 125. The control unit 60 controls the generated downlink transmission signal 12
7 is transmitted at the timing when the synchronization signal 124 is transmitted.
When the transmission of the downlink transmission signal 127 is completed, the synchronization signal 1 is transmitted again.
Send 24.

Further, it is a timing chart of ON / OFF of the power supply for driving the receiving section / local oscillation section of the receiver (11).
1) and a timing chart of a receiving operation in which a receiver detects a downlink transmission signal and takes in data. In (112), in the receiver 2, when the receiver 2 starts up, for example, when the power is turned on, the relay 51 sends the signal from the relay 51. The synchronization signal capturing 134 is continued until the synchronization signal 124 can be detected three times, for example. Here, it is needless to say that the number of times is not limited. The control unit 20 detects the synchronization signal 12
4 at the timing synchronized with the reference 4
Start 2 The receiver / local oscillator drive power supply 26 is turned on at a timing earlier than the synchronization signal 124 by a time that allows for the receiver / local oscillator rise time 135. Since the timing at which the downlink transmission signal 127 is transmitted from the repeater 51 and the downlink transmission signal detection 132 at the receiver 2 are synchronized, when the downlink transmission signal 127 is detected at the receiver 2, the control unit 20 executes a known operation. The receiving unit / local oscillation unit driving power supply 26 is temporarily turned off for a time and the downlink transmission signal 127 is turned off.
The data fetch 149 is started from the timing of the data A116 included in the data. When the data acquisition 149 is completed, the above-described synchronization signal acquisition 134 is performed again.

The relationship between the downlink transmission signal detection cycle 133 and the data fetch time 131 is represented by the following relationship. -Downlink transmission signal detection cycle 133 = synchronization signal transmission cycle 12
5 Data acquisition time 131> Data transmission time 120 Therefore, in the present embodiment, by incorporating the repeater 51 into the system and transmitting the synchronization signal 124 from the repeater 51, the synchronization signal transmission cycle 125 of the synchronization signal 124
Is arbitrarily large, the downlink transmission signal detection period 133 of the receiver 2 can be set large, that is, the power consumption of the receiver 2 can be suppressed. Further, by incorporating the repeater 51 into the system, The communication area can be expanded.

Third Embodiment A third embodiment will be described in detail with reference to FIGS. 3 and 4, and FIGS. In the present embodiment, the system of the first embodiment and the system of the second embodiment described above
The purpose of the present invention is to reduce the power consumption by using the local oscillation unit 10 and the local oscillation unit 24 of the transmitter 1 and the receiver 2 using a fixed channel oscillation circuit.

In FIGS. 8 and 9, the local oscillator 10 and the local oscillator 24 of the transmitter 1 and the receiver 2 are constituted by fixed channel oscillator circuits. 3 and 4, the transmitter / local oscillator rise time 101 of the transmitter 1 shown in FIG.
In addition, the rise time 104 of the receiver / local oscillator of the receiver
And rise time 13 of the receiver / local oscillator of the receiver
In No. 5, when the local oscillating unit 10 and the local oscillating unit 24 are configured by the multi-channel type PLL circuit in which the channel can be arbitrarily set as described above, the time becomes long. In the receiver 2, when the local oscillation unit 24 is configured by a multi-channel type PLL circuit capable of arbitrarily setting a channel, the downlink transmission signal detection 102
And the receiving unit / local oscillation unit driving power supply 26 is turned on at a timing earlier than the time when the downlink transmission signal detection 132 is started.
N, which increases power consumption.

Therefore, in the present embodiment, local oscillator 10 and local oscillator 2 of transmitter 1 and receiver 2
By using the transmission circuit 4 for the fixed channel, the transmission section / local oscillation section drive power ON time 78, the reception section / local oscillation section drive power ON time 98 and the reception section / local oscillation section drive power ON time 129 are reduced. You. That is, power consumption can be suppressed.

[Fourth Embodiment] A fourth embodiment will be described in detail with reference to FIGS. This embodiment aims at enabling the receiver 2 to know the incoming call history in the first, second and third embodiments described above.

As shown in FIG. 1, an upstream transmission signal 52 transmitted from each of a plurality of transmitters 1 irregularly in time.
Is received by the repeater 51 in the manner described above, and the control unit 60 stores the incoming call history in a memory. For example,
The control unit 60 has a memory that can store the incoming call history for ten times, and upon receiving the eleventh uplink transmission signal 52, the first received incoming history is erased. Also, the repeater 51 transmits the incoming history stored in the repeater 51 to the receiver 2 every time one incoming history stored in the repeater 51 disappears. Therefore, the receiver 2 can know the incoming call history.

[Fifth Embodiment] A fifth embodiment will be described in detail with reference to FIGS. The present embodiment aims to improve the reliability of wireless communication by performing carrier sense by the base station 51 in the first embodiment.

FIG. 5 shows the timing of the downlink transmission signal 145 transmitted from the repeater 51 upon receipt of the uplink signal 139 transmitted from the transmitter 1 and the timing of the downlink transmission signal 145 newly transmitted from another transmitter 150. 5 shows a timing chart when the timing of the uplink transmission signal 140 temporally collides.
FIG. 5 shows a timing chart (136) of the uplink transmission signal transmitted from the transmitter, a timing chart (137) of data acquisition by the repeater, and a timing chart (138) of the downlink transmission signal. The uplink transmission signal 139, the uplink transmission signal 140, and the downlink transmission signal 14
5, when the channel of the downlink transmission signal 146 is the same as the channel of the downlink transmission signal 146, as shown in FIG. , The repeater 51 performs the carrier sense 143. When the carrier sense 143 is being executed, the uplink transmission signal 14 from another transmitter 150 is newly added.
0 is transmitted, the repeater 51 transmits the downlink transmission signal 145
Is temporarily stopped, and an uplink transmission signal acquisition 142 is performed on the uplink transmission signal 140. Thereafter, the repeater 51 executes the carrier sense 143 again, and if another uplink transmission signal is not transmitted within the time of the carrier sense 143, the repeater 51 transmits the above-mentioned temporarily stopped downlink transmission signal 145 again. In order to do so, a down transmission signal 146 is transmitted. Note that the uplink transmission signal 140 is also the uplink transmission signal 13
It goes without saying that after carrying out the carrier sense 143 as in the case of No. 9, it is transmitted as a downlink transmission signal from the repeater 51.

Therefore, in the present embodiment, even when the timing of the uplink transmission signal 140 and the timing of the downlink transmission signal 145 are the same, it is possible to avoid a temporal collision between the two by performing the carrier sense 143. The quality of wireless communication can be improved.

[Sixth Embodiment] A sixth embodiment will be described in detail with reference to FIGS. 2 to 3, FIG. 6, and FIG.

FIG. 6 is a block diagram of the transmitter 1 shown in FIG.
And the downlink transmission signal 53 transmitted from the repeater 51 have the same channel.
FIG. 7 is a diagram showing a state in which both a direct transmission signal 147 from the transmitter and a downlink transmission signal 53 from the relay reach the receiver.

In this embodiment, the system of the first embodiment, the system of the third embodiment, and the fourth embodiment
In the system of the embodiment, when the channel of the uplink transmission signal 52 and the channel of the downlink transmission signal 53 are the same, the transmitter 1
It is conceivable that the transmission signal 147 directly reaches the receiver 2 from. The transmission signal 147 that directly arrives at the receiver from the transmitter 1, which is the same as the uplink transmission signal 87 shown in FIG. 3, and the downlink transmission signal 97 do not temporally collide with each other. Both can be distinguished.
In other words, if a transmission signal including the same data arrives at the receiver 2 with a certain time difference, and if the time difference is not separated by a certain time that can be arbitrarily set by the receiver 2, the later-arrived data is discarded. .

Therefore, in this embodiment, the transmitter 1
Not only discards the downstream transmission signal 53 transmitted from the repeater and the transmission signal 147 that has arrived directly at the receiver 2, but also generally discards the downstream transmission signal 53 that arrives later. Even if a transmission signal is transmitted many times in a short time as described above, if the signal arrives at the receiver 2 many times within a certain time set by the receiver 2, unnecessary late arrivals are discarded. it can.

[Seventh Embodiment] A seventh embodiment will be described in detail with reference to FIGS. In this embodiment, the system according to the first embodiment, the system according to the second embodiment, the system according to the third embodiment, the system according to the fourth embodiment, and the fifth embodiment are described. In the system of the sixth embodiment and the system of the sixth embodiment, a plurality of transmitters are registered in the memory of the control unit 60 of the relay unit 51 by the method of registering the transmitter 1 in the relay unit 51 described above. Further, the receiver 2 is set to the registration mode by the method of setting the receiver 2 to the registration mode described above. The repeater 51 transmits the IDs of the plurality of transmitters stored in the repeater 51 to the receiver 2, and registers the IDs of the plurality of transmitters in the receiver 2.

Therefore, according to the above-described registration method, the number of transmitters 1A (for example, A: any number from 1 to 9) is changed to the number of receivers 2B.
(For example, B: any number from 1 to 9)
In contrast to the case where xB registration operations are required, in the present embodiment, it is only necessary to perform A + B registration operations.

[Eighth Embodiment] An eighth embodiment will be described in detail with reference to FIGS. In this embodiment, the system according to the first embodiment, the system according to the second embodiment, the system according to the third embodiment, the system according to the fourth embodiment, and the fifth embodiment are described. In the system of the sixth embodiment and the system of the sixth embodiment, a plurality of transmitters are registered in the memory of the control unit 60 of the repeater 51 by the method of registering the transmitter 1 in the repeater 51 described above. The receiver 2 is set to the registration mode by the method of setting the receiver 2 to the registration mode described above. The repeater 51 transmits the IDs of the plurality of transmitters stored in the repeater 51 to the receiver 2, and registers the IDs of the plurality of transmitters in the receiver 2. Also,
I of the receiver 2 to be registered from the I / O unit 61 of the repeater 51
Enter D.

Accordingly, in the present embodiment, since a plurality of transmitters and receivers 2 incorporated in the system can be registered in the repeater 51, for example, data transmitted from a specific transmitter 1 is specified. The receiver 2 can be arbitrarily selected, for example, to be relayed to the receiver 2, and for example, data transmitted from a specific transmitter 1 is randomly transmitted to a certain receiver 2, and according to a certain rule. They can be transmitted in order.

[0060]

According to the first aspect of the present invention, by incorporating a repeater into the system, the duration of the uplink transmission signal of the transmitter is not changed, that is, the power consumption of the transmitter is not increased, and The downlink signal detection period can be increased without changing the data acquisition time of the receiver, that is, the power consumption of the receiver can be suppressed, and at the same time, the service area can be expanded.

According to the second aspect of the present invention, by incorporating the repeater into the system and transmitting the synchronization signal from the repeater, the synchronization signal transmission cycle of the synchronization signal can be increased, and the downlink transmission on the portable receiver side can be performed. The signal detection cycle can be set large, that is, the power consumption of the receiver can be suppressed, and at the same time, the service area can be expanded.

According to the third aspect of the present invention, the local oscillation section of the transmitter and the receiver is a fixed-channel oscillation circuit, so that the multi-channel PLL circuit system including a PLL circuit or the like can be used. In comparison, there is an effect that power consumption can be suppressed by the time required until the multi-channel PLL circuit starts up.

According to the fourth aspect of the present invention, by leaving the incoming call history from the transmitter in the repeater, there is an effect that the incoming call history can be known in the receiver.

According to the fifth aspect of the present invention, even when the timing of the uplink transmission signal and the timing of the downlink transmission signal are the same, it is possible to avoid a temporal collision between the two by performing carrier sense, There is an effect that the quality of wireless communication can be improved.

According to the sixth aspect of the present invention, a transmission signal directly reaching a receiver from a transmitter and a downstream transmission signal transmitted from a repeater are discriminated, and a downstream transmission signal that arrives later is generally discarded. In addition to the above, for example, when a customer sends a transmission signal in a short time more than necessary in a restaurant, etc., a signal that reaches the receiver many times within a certain time set on the receiver side If there is, an effect that an unnecessary incoming call of the later arrival can be discarded is exerted.

According to the seventh aspect of the present invention, the transmitter A
In the case where the number of registrations is registered in the number of receivers B, A × B times of registration work is required, whereas in this embodiment, A + B
This has the effect that only registration work needs to be performed.

According to the invention of claim 8, since the transmitter and the receiver incorporated in the system can be grasped in the repeater, for example, data transmitted from a specific transmitter can be received by a specific receiver. It is possible to arbitrarily select a receiver, such as sending the data to a receiver, and to transmit data transmitted from a specific transmitter to the receiver at random or sequentially according to a certain rule.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a system according to an embodiment of a wireless relay system according to the present invention.

FIG. 2 is a block diagram of the repeater.

FIG. 3 is a timing chart of transmission from the repeater to a receiver.

FIG. 4 is a timing chart for transmitting a synchronization signal from the repeater.

FIG. 5 is a timing chart in which the channel of the transmission signal transmitted from the transmitter and the channel of the transmission signal transmitted from the repeater are the same and both temporally collide.

FIG. 6 is a view illustrating a transmission signal transmitted from the transmitter and a transmission signal transmitted from the repeater having the same channel, and both the transmission signal from the transmitter and the transmission signal from the relay reach the receiver; FIG.

FIG. 7 is a schematic diagram of a conventional system.

FIG. 8 is a block diagram of a transmitter in the conventional system.

FIG. 9 is a block diagram of a receiver in the conventional system.

FIG. 10 is a diagram showing a timing chart of the conventional system.

[Explanation of symbols]

 Reference Signs List 1 transmitter 2 receiver 3 transmission signal 4 transmission antenna 5 transmission section 6 transmission signal 7 I / O signal 8 control section 9 I / O section 10 local oscillation section 11 power supply section 12 local oscillation signal 13 channel setting signal 14 transmission section Local oscillation section drive power supply 15 ON / OFF section 16 Receiving antenna 17 Receive signal 18 I / O signal 19 I / O section 20 Control section 21 Power supply section 22 Receiving section 23 Local oscillation signal 24 Local oscillation section 25 Channel setting signal 26 Receiving section・ Local oscillation unit driving power supply 27 ON / OFF unit 51 Repeater 52 Transmission signal 53 Transmission signal 54 Receiving antenna 55 Transmission antenna 56 Receiving unit driving power supply 56 Constant receiving unit driving power supply 57 Receiving signal 58 Receiving unit 59 Channel setting signal 60 Control unit 61 I / O section 62 ON / OFF section 63 Transmission signal 64 ON / OFF section 65 Transmission section drive Power supply 66 Transmitter 67 Local oscillator 68 Power supply 69 Outlet 70 Local oscillator signal 71 I / O signal

Continuing on the front page (72) Inventor Minoru Kanda 1048 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd. 5K067 AA22 AA43 BB04 CC21 DD25 EE02 EE06 EE10 EE16 GG02 GG11 JJ43 JJ66 5K072 AA20 AA29 BB13 BB27 CC35 DD11 DD16 DD17 DD19 EE34 EE35 FF02 FF06 FF12 FF23 GG12 GG13 GG14 GG14

Claims (8)

[Claims] In a wireless transmission / reception system including a transmitter and a receiver, both of which are portable, a signal transmitted by the transmitter is received by a repeater, and the received signal is repeatedly transmitted to the receiver. A wireless relay system. 2. The wireless communication system according to claim 1, wherein a synchronization signal used in a PHS or the like is transmitted from the repeater to the receiver, and the receiver sets a reception timing according to the synchronization signal. Relay method. 3. The wireless relay apparatus according to claim 1, wherein communication between the repeater and the receiver is limited to a fixed channel. 4. The wireless relay device according to claim 1, wherein the repeater has a function of storing an incoming call history. 5. When the transmission / reception channel is the same, the repeater has a carrier sense function, checks the presence or absence of a transmission signal from the transmitter, and transmits the signal to the receiver at a timing with little radio wave interference. 2. The wireless relay device according to claim 1, wherein the wireless relay device has a function of performing the following. 6. In a case where a signal emitted from a transmitter is distinguished from a combined signal received by the repeater and transmitted from the repeater on the receiver side, the receiver receives the signal. 5. The wireless relay system according to claim 1, wherein a combined signal received within a predetermined time (variable length) after that is discarded. 7. When there are a plurality of transmitters and receivers, the repeater has a transmitter registration function for distinguishing the plurality of transmitters, and after registering all the transmitters in the repeater. 7. The wireless relay system according to claim 1, wherein registration information of a transmitter registered in the repeater is simultaneously transmitted from the repeater to all receivers. 8. The relay device according to claim 1, wherein the repeater selects an arbitrary receiver from the plurality of receivers and transmits the selected one.
The wireless relay system described.