JP2012105102A - Radio repeater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio repeater that can increase communication speed and reduce a probability of collision of signals by performing communication as much as possible with the use of a frequency band allowing a higher speed in the case that communication is performed with the use of two frequency bands in combination.SOLUTION: A repeater 30 for relaying a radio signal from a terminal device to a receiving device comprises: a first signal processing unit 37 for performing transmission and reception processing of a radio signal in a first frequency band; and a second signal processing unit 38 for performing transmission and reception processing of a radio signal in a prescribed second frequency band with communication speed faster than the first frequency band. The repeater transmits a radio signal to the receiving device through the second signal processing unit 38 in the second frequency band in the both cases that the radio signal in the first frequency band from the terminal device has been received through the first signal processing unit 37 and that the radio signal in the second frequency band from the terminal device has been received through the second signal processing unit 38.

Description

  The present invention relates to a wireless repeater for relaying a wireless signal.

  In general homes and the like, crime prevention systems that monitor for abnormalities such as the presence of intruders and fires, and notify the abnormality when an abnormality is detected have become widespread. In particular, in recent years, a wireless crime prevention system that transmits a signal wirelessly from a detection sensor, receives the transmitted signal by a receiving device, and performs abnormality notification or the like has been put into practical use.

  FIG. 7 is an explanatory diagram for explaining a configuration of a conventional wireless crime prevention system. As shown in FIG. 7, a wireless crime prevention system 100 includes a wireless opening / closing sensor 101 that detects the open / closed state of a door or window, a wireless fire sensor 102 that detects a fire, and a wireless security sensor that detects a human body. It is configured to include a human sensor 103, a wireless abnormality alarm lamp 104 for informing the outdoors of an abnormality, a repeater 105 that wirelessly relays signals transmitted from these sensors 101 to 103, and a receiving device 106. Yes. The receiving device 106 receives the signals transmitted from the sensors 101 to 103 via the repeater 105 or directly receives the signals, thereby monitoring the presence / absence of the abnormality and detecting the abnormality when detecting the abnormality. A warning signal is transmitted to the lamp 104 wirelessly to notify the abnormality, and if necessary, the abnormality occurrence is transferred to the security company by wire or wirelessly (for example, Patent Document 1 discloses an abnormality detection means. A security system for houses is disclosed).

  In such a wireless crime prevention system 100, since wireless transmission is performed at a short distance of about several meters to several tens of meters, the frequency band for wireless transmission is a 426 MHz band that is a specific low-power security wireless band. It was used. Here, in ARIB STD-30, which is a standard for this specific low-power security radio, carrier sense is not obliged when using radio waves having a frequency of 426.250 MHz or more and 426.8375 MHz or less. Carrier sense refers to sensing the reception power level of another radio wave having the same frequency as the carrier frequency in the radio transmission when performing radio transmission, and if this reception power level is equal to or higher than a predetermined threshold, radio transmission is performed. Means do not. Since it has been specified that such carrier sense is not necessary, in the conventional wireless crime prevention system, each of the sensors 101 to 103 performs wireless transmission without performing carrier sense.

Japanese Patent Laid-Open No. 2003-115085

  However, in the conventional wireless crime prevention system 100, only one frequency band such as the 426 MHz band is used as the frequency band for wireless transmission, so the communication speed is as slow as 1,200 bps, for example. It takes time for the wireless signal transmitted from 103 to reach the receiving apparatus 106, and in particular, it takes time to reach the receiving apparatus 106 via the repeater 105.

  In addition, since each sensor 101 to 103 performs wireless transmission without performing carrier sense, when the number of sensors 101 to 103 is increased, the probability that signals collide due to wireless transmission being performed at the same timing. There is a possibility that a signal having a high radio wave intensity does not reach the repeater 105 or the receiving device 106 due to the increase.

  In order to solve such a problem, 1) a carrier sense function is added to each of the sensors 101 to 103, 2) a wireless transmission frequency band of each sensor has a higher communication speed than the 426 MHz band, and It may be possible to change to a frequency band (for example, 950 MHz band) where carrier sense is obligatory. However, in order to change the functions and frequency bands of the sensors 101 to 103 in this way, the existing sensors 101 to 103 with a large number of installations are replaced, or the new sensors 101 to 103 with many types are designed. It needs to be changed and is not realistic.

  Therefore, the inventor of the present application does not perform carrier sense in the 426 MHz band in the wireless transmission from each of the sensors 101 to 103, and on the other hand, the frequency band of the wireless transmission from the repeater 105 to the receiving device 106 We focused on solving the above problems by setting the 950 MHz band to 950 MHz. That is, when the 950 MHz band is used as described above, the communication speed from the repeater 105 to the receiving apparatus 106 can be improved to, for example, 9,600 bps, and wireless transmission from the repeater 105 or the receiving apparatus 106 is possible. Sometimes, by performing carrier sense, a radio signal can surely reach the receiving apparatus 106, and communication reliability can be improved. In particular, in this case, only the functions of the repeater 105 and the receiving device 106 need to be changed. Since the number and types of the repeater 105 and the receiving device 106 are small compared to the sensors 101 to 103, Easy to apply in reality.

  However, even if the repeater 105 is provided with a communication function of 950 MHz band in addition to the communication function of 426 MHz band so that the 426 MHz band and the 950 MHz band can be used in combination as described above, However, since wireless transmission can still be performed only in the same 426 MHz band as before, there are still various problems. That is, when wireless transmission using the 426 MHz band is performed by the repeater 105, there is a problem that the communication speed of the repeater 105 is lower than when the 950 MHz band is used. In addition, when the repeater 105 performs wireless transmission in the 426 MHz band without performing carrier sense, the signals transmitted from the sensors 101 to 103 and the repeaters 105 when a plurality of repeaters 105 are provided. Signals may still collide with each other, and the probability of this collision cannot be reduced.

  The present invention has been made in view of the above, and in the case of performing communication using two frequency bands in combination, the communication speed can be improved by performing communication in the high frequency band as much as possible. An object of the present invention is to provide a wireless repeater that can reduce the probability of signal collision.

  In order to solve the above-described problems and achieve the object, a wireless repeater according to claim 1 is a wireless repeater that relays a wireless signal from a terminal device to a receiving device, and has a predetermined first frequency band. A first signal processing unit that performs transmission / reception processing of a wireless signal of the second signal, and a second signal that performs transmission / reception processing with a wireless signal of a predetermined second frequency band different from the first frequency band and having a higher communication speed than the first signal processing unit A processing unit, and when receiving a radio signal of the first frequency band from the terminal device via the first signal processing unit, and transmitting a radio signal of the second frequency band from the terminal device to the second signal In either case of receiving via the processing unit, these radio signals are transmitted to the receiving device in the second frequency band via the second signal processing unit.

  The radio repeater according to claim 2 is the radio repeater according to claim 1, wherein the second signal processing unit performs carrier sense when transmitting a radio signal in the second frequency band. .

  According to a third aspect of the present invention, there is provided a radio repeater according to the first or second aspect, wherein the radio repeater converts the radio signal in the first frequency band into a radio signal in the second frequency band. When the wireless signal in the first frequency band is received from the terminal device via the first signal processing unit, the received signal is transmitted in the second frequency band via the wireless signal conversion unit. The wireless signal is converted into a wireless signal, and the converted wireless signal is transmitted to the receiving device in the second frequency band via the second signal processing unit.

  Moreover, the radio repeater according to claim 4 is the radio repeater according to any one of claims 1 to 3, wherein the terminal device is a security terminal that transmits a radio signal in the first frequency band. Yes, the radio signal in the first frequency band received from the security terminal via the first signal processing unit is transmitted to the receiving device in the second frequency band via the second signal processing unit, The radio signal in the second frequency band received from the receiving device via the second signal processing unit is transmitted to the security terminal in the first frequency band via the first signal processing unit.

  Moreover, the wireless repeater according to claim 5 is the wireless repeater according to any one of claims 1 to 4, wherein the terminal device transmits a wireless signal in the second frequency band. A radio signal in the second frequency band received from the portable setting device is transmitted to the reception device in the second frequency band via the second signal processing unit and received from the reception device. The wireless signal in the second frequency band is transmitted to the portable setting device in the second frequency band via the second signal processing unit.

  Further, in the wireless repeater according to claim 6, in the wireless repeater according to claim 2, when a carrier sense is performed when transmitting a wireless signal in the second frequency band, another wireless signal is generated. When transmitting, the first signal processing unit wirelessly transmits in the first frequency band.

  According to the radio repeater according to claim 1, when receiving either the first frequency band radio signal or the second frequency band radio signal from the terminal device, the radio signal is set to the second frequency band. Therefore, it is possible to improve the communication speed from the wireless repeater to the receiving device as compared with the case where the relay is performed with the first frequency band.

  Further, according to the radio repeater according to claim 2, since carrier sense is performed when a radio signal is transmitted to the receiving device in the second frequency band, relay is performed without performing carrier sense in the first frequency band. The probability of signal collision can be reduced and the reliability of communication can be improved as compared with the case where the communication is performed.

  Further, according to the radio repeater according to claim 3, when a radio signal in the first frequency band is received from the terminal device, the radio signal is converted into a radio signal in the second frequency band and transmitted. Even when the command system and the like differ between the radio signal of the first frequency band and the radio signal of the second frequency band, the radio signal of the first frequency band can be relayed in the second frequency band.

  According to the wireless repeater of claim 4, when a wireless signal in the first frequency band is received from the security terminal, the wireless signal is transmitted to the receiving device in the second frequency band. It becomes possible to improve the communication speed when relaying the output from the disaster prevention terminal such as the fire sensor or the human sensor to the receiving device.

  According to the wireless repeater of claim 5, when a wireless signal in the second frequency band is received from the portable setting device, the wireless signal is transmitted to the receiving device in the second frequency band. The communication speed when relaying the output from the type setting device to the receiving device can be maintained as in the conventional case.

  According to the wireless repeater of claim 6, when the second frequency band is in use by carrier sense when transmitting a radio signal in the second frequency band, the original frequency band Since transmission is performed in the first frequency band, communication delay due to a transmission standby state can be prevented.

It is explanatory drawing for demonstrating the structure of the wireless crime prevention system which concerns on embodiment of this invention. It is a block diagram which shows the electric constitution of a portable setting apparatus. It is a block diagram which shows the electric constitution of a repeater. It is a block diagram which shows the electric constitution of a receiver. It is a disassembled perspective view for demonstrating the attachment / detachment structure of the radio | wireless transmission / reception part with respect to a receiver. It is explanatory drawing for demonstrating transmission / reception of the signal in a crime prevention system. It is explanatory drawing for demonstrating the structure of the conventional radio | wireless crime prevention system.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. However, the present invention is not limited by this embodiment.

(Overview)
First, the outline of the wireless crime prevention system will be described. FIG. 1 is an explanatory diagram for explaining a configuration of a wireless crime prevention system according to the present embodiment. As shown in FIG. 1, a wireless crime prevention system 1 includes an open / close sensor 10, a fire sensor 11, a human sensor 12, an abnormality notification lamp (outdoor indicator lamp) 13, a repeater 30, and a receiver (a crime prevention receiver). , Center device) 40. Among these, each apparatus except the abnormality notification lamp 13 is disposed indoors in the house, and the abnormality notification lamp 13 is installed outside the house (for example, near the entrance). In the following description, the opening / closing sensor 10, the fire sensor 11, and the human sensor 12 are collectively referred to as “security sensor 2” as necessary, and the security sensor 2 and the abnormality notification lamp 13 are referred to as “ Collectively referred to as “security terminal 3”. Here, one each of the open / close sensor 10, the fire sensor 11, the human sensor 12, the abnormality notification lamp 13, and the repeater 30 are provided, but any plurality may be provided.

  Moreover, the crime prevention system 1 of this Embodiment is comprised with the portable setting apparatus 20 unlike the conventional crime prevention system shown in FIG. The portable setting device 20 is setting means for remotely setting the security alert state of the receiving device 40 wirelessly. For example, the portable setting device 20 is carried by a user or used in an arbitrary place within a range where radio waves reach the indoor repeater 30 or receiving device 40. In particular, when the receiving device 40 is installed in the living room and the living room is away from the entrance, it takes time until the user releases the security mode in the living receiving device 40 after the user returns home. Since there is a possibility that the crime prevention mode cannot be canceled in time, the convenience of the user can be improved by arranging the portable setting device 20 in the vicinity of the entrance.

  In this security system 1, two frequency bands are used in combination as frequency bands for transmitting and receiving signals. Specifically, the 426 MHz band is used between the security terminal 3 and the repeater 30 or the receiving device 40. Further, the 950 MHz band is used among the portable setting device 20, the repeater 30, and the receiving device 40. That is, the repeater 30 and the receiving device 40 transmit and receive signals in two frequency bands, a 426 MHz band (first frequency band) and a 950 MHz band (second frequency band). In this way, by using the 950 MHz band in addition to the conventional 426 MHz band, high-speed processing of setting information and the like is achieved by improving the communication speed, and communication reliability is improved. In particular, the security terminal 3 communicates only in the conventional 426 MHz band, so there is no need to replace existing ones or change the design. On the other hand, the repeater 30 and the receiving device 40 need to transmit and receive signals in two frequency bands, but by providing only one control unit 44 to be described later for signal processing, it is simple and inexpensive. The structure allows two frequency bands to be used together. A specific structure for this will be described later.

(Configuration-security terminal)
Next, the configuration of the wireless crime prevention system 1 will be described. First, the configuration of the security terminal 3 will be described. However, since the open / close sensor 10, the fire sensor 11, the human sensor 12, and the abnormality notification lamp 13 can be configured in the same manner as in the past, only the outline thereof will be described here. The open / close sensor 10 is a wireless open / close detection means for detecting the open / closed state of the door or window by magnetism or the like. When the open / close sensor 10 detects that the door or window is open, a signal to that effect is wirelessly transmitted. Send in. The fire sensor 11 is a fire detection means for detecting the occurrence of a fire by detecting smoke or heat. When a fire occurrence is detected, a signal to that effect is transmitted wirelessly. The human sensor 12 is a human body detection unit that detects a human body by detecting infrared rays. When a human body is detected, the human sensor 12 wirelessly transmits a signal to that effect. The abnormality notification lamp 13 is an abnormality occurrence notifying means for notifying the occurrence of an abnormality such as a fire outdoors by turning on or blinking when a transfer signal is received from the receiving device 40. However, the detection principle in these security terminals 3 is arbitrary, and other known principles can be used.

(Configuration-portable setting device)
The portable setting device 20 is a wireless device for setting a security alert state in the receiving device 40 by transmitting a wireless signal to the receiving device 40. FIG. 2 is a block diagram showing an electrical configuration of the portable setting device 20. As shown in FIG. 2, the portable setting device 20 includes various button groups 22 and an indicator lamp group 23 on the front surface of the housing, and a wireless transmission / reception unit 24, a speaker 25, and a storage unit inside the housing. 26, a power supply unit 27, and a control unit 28 are accommodated.

  The button group 22 includes an emergency button 22a, a start button 22b, a security button 22c, and a release button 22d. The indicator lamp group 23 includes an emergency lamp 23a, an alarm lamp 23b, an OK lamp 23c, an NG lamp 23d, a guard lamp 23e, and a release lamp 23f.

  The wireless transmission / reception unit 24 transmits and receives wireless signals in the 950 MHz band, and includes a dedicated antenna 24a in the 950 MHz band. The speaker 25 outputs an alarm sound. The storage unit 26 is configured by, for example, a flash memory (the same applies to storage units 32 and 42 described later), and stores programs and parameters necessary for control of the portable setting device 20. The power supply unit 27 includes a battery (not shown), and supplies power supplied from the battery to each unit of the portable setting device 20. The control unit 28 includes, for example, a CPU (Central Processing Unit) (not shown) and a program executed on the CPU. In particular, the control unit 28 includes a signal processing unit 28a. When transmitting a radio signal, the signal processing unit 28a performs carrier sense by a known method, and transmits the radio signal only when radio of the same frequency is not detected.

  In the portable setting device 20 configured as described above, when the emergency button 22a is pressed, an emergency signal is transmitted to the receiving device 40 via the wireless transmission / reception unit 24, and the emergency light 23a is turned on or blinking (hereinafter referred to as “emergency light”). The lighting or flashing is simply described as lighting). When the emergency signal is received by the receiving device 40, the emergency signal is transferred from the receiving device 40 to the security company, and the security guard rushes to the house.

  When the security button 22c is pressed, the security lamp 23e is turned on. When the start button 22b is pressed in this state, a security request signal is transmitted via the wireless transmission / reception unit 24. When the guard request signal is received by the receiving device 40, the crime prevention mode of the receiving device 40 is set to the outing guard mode. Here, the outing security mode is a mode in which the security company performs monitoring when the user goes out. When an abnormality occurs, an abnormal signal is transferred from the receiving device 40 to the security company, and the security guard rushes to the house. . When the crime prevention mode of the receiving device 40 is set to the outing security mode in this way, a security confirmation signal is transmitted from the receiving device 40, and this security confirmation signal is transmitted via the wireless transmission / reception unit 24 of the portable setting device 20. If received, the OK lamp 23c is turned on. On the other hand, when the security confirmation signal is not received by the portable setting device 20 within a predetermined time after the start button 22b is pressed, the NG lamp 23d is turned on.

  When the release button 22d is pressed, the release lamp 23f is turned on. When the start button 22b is pressed in this state, a release request signal is transmitted via the wireless transmission / reception unit 24. When the release request signal is received by the receiving device 40, the crime prevention mode of the receiving device 40 is released. When the crime prevention mode is released in this way, a release confirmation signal is transmitted from the receiving device 40, and when this release confirmation signal is received via the wireless transmission / reception unit 24 of the portable setting device 20, the OK light 23c. Lights up. On the other hand, when the release confirmation signal is not received by the portable setting device 20 within a predetermined time after the start button 22b is pressed, the NG lamp 23d is turned on.

(Configuration-repeater)
1 is a relay means for receiving a signal wirelessly transmitted from the security sensor 2 and transmitting the received signal to the portable setting device 20 or the receiving device 40. It is a wireless repeater for the crime prevention system that receives. The repeater 30 is also a relay unit that receives a signal wirelessly transmitted from the receiving device 40 and transmits the signal to the portable setting device 20 or the abnormality notification lamp 13. The repeater 30 is disposed between the security sensor 2 and the receiving device 40, or is disposed between the receiving device 40 and the abnormality notification lamp 13.

  FIG. 3 is a block diagram showing an electrical configuration of the repeater 30. As shown in FIG. 3, the repeater 30 includes a wireless transmission / reception unit 31, a storage unit 32, a power supply unit 33, and a control unit 34. The wireless transmission / reception unit 31 transmits / receives signals in the 426 MHz band and the 950 MHz band. Details of the wireless transmission / reception unit 31 will be described later. The storage unit 32 stores programs and parameters necessary for controlling the repeater 30. The power supply unit 33 includes a battery (not shown), and supplies power supplied from the battery to each unit of the repeater 30. The control unit 34 is a control unit that controls each unit of the repeater 30.

  Here, the detail of the structure of the radio | wireless transmission / reception part 31 is demonstrated. The wireless transmission / reception unit 31 includes an antenna 35, an antenna side connection unit 36, a first signal processing unit 37, a second signal processing unit 38, and a control unit side connection unit 39. Only one antenna 35 is provided, and this antenna 35 is used in combination for transmission and reception of signals in two frequency bands of the 426 MHz band and the 950 MHz band. That is, the total length L of the antenna 35 is determined to be a quarter wavelength of 426 MHz and a fifth wavelength of 950 MHz so that the 426 MHz band and the 950 MHz band can be used together. The antenna side connection part 36 is a connection terminal connected to the antenna 35.

  The first signal processing unit 37 processes a 426 MHz band signal, and includes an LPF (low-pass filter) 37a and a first basic processing unit 37b. The LPF 37a is a first frequency band passing means that allows only signals below the vicinity of the 426 MHz band to pass. The LPF 37a may be a BPF (band pass filter) that allows only the vicinity of the 426 MHz band to pass. The first basic processing unit 37b converts the signal in the first frequency band received by the antenna 35 and input through the antenna side connection unit 36 into a signal of a predetermined first method, and controls the control unit side connection unit 39. The first system signal input from the control unit 34 via the control unit side connection unit 39 is output to the antenna 35 via the antenna side connection unit 36 in the first frequency band. .

  The second signal processing unit 38 processes a 950 MHz band signal, and includes an HPF (High Pass Filter) 38a, a second basic processing unit 38b, and a compatible processing unit 38c. The HPF 38a is a first frequency band passing means that allows only signals in the vicinity of the 950 MHz band or higher to pass. The HPF 38a may be a BPF (band pass filter) that passes only the vicinity of the 950 MHz band. The second basic processing unit 38b converts the second frequency band signal received by the antenna 35 and input via the antenna side connection unit 36 into a predetermined second system signal and outputs the second system signal. Is output to the antenna 35 via the antenna side connection section 36 in the second frequency band. The compatible processing unit 38c converts the signal output from the second basic processing unit 38b into the second system signal and converts the signal into the first system signal, and sends it to the control unit 34 via the control unit side connection unit 39. In addition to outputting, the first system signal input from the control unit 34 via the control unit side connection unit 39 is converted into a second system signal and output to the second basic processing unit 38b.

  In particular, the first signal processing unit 37 transmits a radio signal in the 426 MHz band without performing carrier sense, and the second signal processing unit 38 performs a carrier sense in a known method when transmitting a radio signal in the 950 MHz band. The radio signal is transmitted only when radio in the same frequency band is not detected.

  Of the components of the wireless transmission / reception unit 31 configured as described above, the components other than the antenna 35 are mounted on both surfaces of the same base and modularized. More specifically, for example, the first basic processing unit 37b and the second basic processing unit 38b are each configured by a wireless IC, and the compatible processing unit 38c is configured by a microcomputer, and the wireless IC and the microcomputer are the same. It is mounted on both sides of the board. In designing this mounting layout, a configuration for preventing mutual interference between a signal of 426 MHz band and a signal of 950 MHz band (for example, installation of an impedance for reducing power supply noise, disposition of 426 MHz system and 950 MHz system, noise It is preferable to employ a shield installation or the like.

  Here, the signal system will be described. Here, the signal system means a signal that causes a difference other than the frequency band between the 426 MHz band signal and the 950 MHz band signal, and includes, for example, a transmission / reception protocol, a signal format, and a command system. Hereinafter, a case where the signal system is a command system will be described. That is, the first basic processing unit 37b converts a signal in the 426 MHz band that is analog input via the antenna into a command corresponding to the content of the signal and outputs it as a serial signal, and the second basic processing unit 38b A 950 MHz band signal analog-input via the antenna is converted into a command corresponding to the content of the signal and output as a serial signal. Here, the command system of the 426 MHz band signal (first command system) and the command system of the 950 MHz band signal (second command system) are different from each other. The commands of the second command system are converted to each other as necessary. A specific example of this conversion will be described later.

  As described above, the specific content of the command converted by the compatibility processing unit 38c is arbitrary. For example, the frequency channel setting, the signal transmission instruction, the signal reception instruction, the carrier sense automatic execution instruction, and the carrier sense may be used. An instruction to transmit the value of the acquired radio wave intensity can be given. In order to perform such conversion, command conversion data for converting a command of the second command system into a command of the first command system is stored in advance in the compatibility processing unit 38c. By adopting such a configuration, the control unit 34 may communicate with the wireless transmission / reception unit 31 using only commands of the first command system (control of signals in the 426 MHz band as in the past). Since it is not necessary to use two commands of the first command system and the second command system, the configuration of the control unit 34 can be simplified.

(Configuration-Receiver)
Next, the receiving device 40 in FIG. 1 will be described. The receiving device 40 is a control device that monitors the presence or absence of an abnormality by receiving a signal transmitted from the security sensor 2 via the repeater 30 or by directly receiving the signal. The signal from the security sensor 2 It is a wireless receiver for a crime prevention system that receives When the receiving device 40 detects an abnormality, the abnormality notification lamp 13 is wirelessly transmitted to the abnormality notification lamp 13 to notify the abnormality, and if necessary, an abnormality occurrence is wired or wirelessly to the security company. It is also a wireless repeater for transferring information. The receiving device 40 is installed, for example, in a place (typically, an entrance or a living room) that is easy for a user to visually recognize indoors.

  FIG. 4 is a block diagram illustrating an electrical configuration of the receiving device 40. As shown in FIG. 4, the reception device 40 is configured to accommodate a wireless transmission / reception unit 41, a storage unit 42, a power supply unit 43, and a control unit 44. The storage unit 42 stores programs and parameters necessary for controlling the receiving device 40. The power supply unit 43 supplies power supplied from a commercial power supply to each unit of the receiving device 40. The control unit 44 controls each unit of the receiving device 40.

  The wireless transmission / reception unit 41 is a wireless transmission / reception unit that transmits and receives signals in the 426 MHz band and the 950 MHz band. The antenna 45, the antenna side connection unit 46, the first signal processing unit 47, the second signal processing unit 48, and the control unit side A connection unit 49 is provided. The first signal processing unit 47 includes an LPF 47a and a first basic processing unit 47b, and the second signal processing unit 48 includes an HPF 48a, a second basic processing unit 48b, and a compatibility processing unit 48c. Since each part of these radio | wireless transmission / reception parts 41 can be comprised similarly to each part of the same name in the radio | wireless transmission / reception part 31 of the repeater 30, except the structure to mention specially, the detailed description is abbreviate | omitted.

  Here, the attachment / detachment structure of the wireless transmission / reception part 41 with respect to the receiver 40 is demonstrated. FIG. 5 is an exploded perspective view for explaining the attachment / detachment structure of the wireless transmission / reception unit 41 with respect to the reception device 40. As shown in FIG. 5, the housing (first housing) 40a of the receiving device 40 is formed with a housing portion 40b which is a recess for detachably housing the wireless transmission / reception unit 41. The unit 40b is provided with a connection terminal 40c (not shown in FIG. 4) for connecting to the control unit side connection unit 49 of the wireless transmission / reception unit 41. On the other hand, the wireless transmission / reception unit 41 is a housing different from the housing 40a of the receiving device 40, and is provided in a housing (second housing) 41a having an outer shape corresponding to the housing unit 40b. Specifically, the antenna side connection unit 46, the first signal processing unit 47, and the second signal processing unit 48 of the wireless transmission / reception unit 41 are accommodated inside the housing 41a, and an antenna is provided outside the housing 41a. 45 and the control part side connection part 49 are arrange | positioned. And in the state which accommodated the radio | wireless transmission / reception part 41 in the accommodating part 40b, the radio | wireless transmission / reception part 41 is connected to the control part 44 by connecting the control part side connection part 49 to the connection terminal 40c.

  Thus, the effect of unitizing the wireless transmission / reception unit 41 is as follows. That is, as described above, the control unit 44 of the receiving device 40 only needs to control the 426 MHz band signal as in the conventional case, and does not need to control the 950 MHz band signal. The signal may be processed and controlled only by the wireless transmission / reception unit 41. Therefore, by unitizing the wireless transmission / reception unit 41, the specific low-power security wireless standard necessary for transmitting / receiving a wireless signal in the 950 MHz band may be acquired only for the wireless transmission / reception unit 41. Since it is not necessary to acquire the wireless standard as a whole, it is possible to easily acquire the wireless standard. In addition, the wireless transmission / reception unit 41 can be unitized so as to have versatility, and the wireless transmission / reception unit 41 can be easily attached to a reception device or a repeater having a configuration different from that of the reception device 40. Is possible. In addition, by adopting the same shape as the unit of the wireless transmission / reception unit of the conventional receiving device 106 only for the 426 MHz band, even when the 950 MHz band is added as the frequency band of the signal to be used, the transmission / reception unit becomes the 950 MHz band compatible unit of the present application. By replacing, it is possible to construct a crime prevention system that can easily transmit and receive in a plurality of bands. Furthermore, each part of the receiving device 40 except the wireless transmission / reception unit 41 may be configured to handle only the control of the 426 MHz band signal, etc., as in the prior art, so there is an improvement associated with handling the 950 MHz band signal. It becomes unnecessary.

(Signal relay processing)
Next, details of the signal relaying process using the two frequency bands of the 426 MHz band and the 950 MHz band in the crime prevention system 1 configured as described above will be described. FIG. 6 is an explanatory diagram for explaining transmission and reception of signals in the security system 1. In the following, “step” is abbreviated as “S”.

  Schematically, the repeater 30 receives a signal from the crime prevention terminal 3 or the portable setting device 20, receives a 426 MHz band radio signal via the first signal processing unit 37, and 950 MHz band radio. In any case where the signal is received via the second signal processing unit 38, these radio signals are transmitted to the receiving device 40 via the second signal processing unit 38 in the 950 MHz band. Alternatively, when receiving a signal from the receiving device 40, the repeater 30 transmits the signal to the security terminal 3 in the 426 MHz band via the first signal processing unit 37 for the signal to the security terminal 3, and the portable type As for the signal for the setting device 20, this signal is transmitted to the security terminal 3 in the 950 MHz band via the second signal processing unit 38. Note that the determination of the reception source and the transmission destination in the repeater 30 is performed by, for example, replacing the data included in the signal received by the repeater 30 with the control unit 34 (or the first signal processing unit 37 or the first unit instead of the control unit 34). This can be done by analysis by the two-signal processor 38).

  Specifically, the abnormality detection signal is transmitted from the security sensor 2 without performing carrier sense in the 426 MHz band (SA1). When the abnormality detection signal is received by the repeater 30, the first basic processing unit 37b of the first signal processing unit 37 of the repeater 30 converts the abnormality detection signal into a command of the first command system and converts it into a control unit. 34, the control unit 34 determines whether or not the abnormality detection signal is relayed based on this command. When relaying, the control unit 34 outputs a relay instruction by a command of the first command system to the second signal processing unit 38. When receiving the relay instruction, the second signal processing unit 38 converts the command of the first command system included in the signal into the command of the second command system via the compatibility processing unit 38c, and the converted The signal is transmitted to the receiving device 40 via the antenna 35 at a frequency of 950 MHz band and then transmitted (SA2). As a result, the radio signal in the 426 MHz band from the security terminal 3 is relayed to the receiving device 40 as a radio signal in the 950 MHz band in which the transmission speed is set faster than the 426 MHz band. Accordingly, it is possible to improve the communication speed from the repeater 30 to the receiving device 40 as compared with the case where the relay is performed with the 426 MHz band. Also, since carrier sensing is performed in the 950 MHz band and relaying is performed, the probability of signal collision can be reduced and communication reliability can be improved compared to the case where relaying is performed without performing carrier sensing in the 426 MHz band. Can do.

When the abnormality detection signal from the security sensor 2 is directly received by the receiving device 40, in the wireless transmission / reception unit 41 of the receiving device 40, the first basic processing unit 47b of the first signal processing unit 47 performs the abnormality detection signal. Is converted to a command of the first command system and transmitted to the control unit 44, and the control unit 44 performs predetermined processing according to the content of the abnormality detection signal based on this command. Further, when an abnormality detection signal from the security sensor 2 is received via the repeater 30, in the wireless transmission / reception unit 41 of the receiving device 40, the first basic processing unit 48b of the second signal processing unit 48 detects the abnormality. The signal is converted from the second command system to a command of the first command system and transmitted to the control unit 44, and the control unit 44 performs a predetermined process according to the content of the abnormality detection signal based on the command.
As part of such processing, the control unit 44 of the receiving device 40 transmits an instruction to turn on the abnormality notification lamp 13 to the first basic processing unit 47b as a command of the first command system as necessary, and this relay Upon receiving the instruction, the first basic processing unit 47b transmits a transfer signal in the 426 MHz band via the antenna 45 without performing carrier sense, and the abnormality notification lamp 13 that has received the transmission signal displays an abnormality notification. (SA3).

  The portable setting device 20 transmits a request signal after performing carrier sense in the 950 MHz band (SA4). When this request signal is received by the repeater 30, the second basic processing unit 38b of the second signal processing unit 38 of the repeater 30 converts the request signal into a command of the second command system, and the compatible processing unit 38c. The compatibility processing unit 38c converts the command of the second command system into a command of the first command system and transmits it to the control unit 34. The control unit 34 determines whether the request signal needs to be relayed based on the command. Make a decision. When relaying, the control unit 34 transmits a relay instruction by a command of the first command system to the compatible processing unit 38c, and the compatibility processing unit 38c converts the command of the first command system into a command of the second command system. To the second basic processing unit 38b, and the second basic processing unit 38b performs the carrier sense and transmits the request signal in the 950 MHz band which is the same frequency band as the signal received via the antenna 35 (SA2 ). As a result, the 950 MHz band radio signal from the portable setting device 20 is relayed to the receiving device 40 as the same 950 MHz band radio signal.

  When the request signal from the portable setting device 20 is directly received by the receiving device 40 or when the request signal is received via the repeater 30, the wireless transmission / reception unit 41 of the receiving device 40 performs the second signal processing. The second basic processing unit 48b of the unit 48 converts the request signal into a command of the second command system and outputs it to the compatibility processing unit 48c. The compatibility processing unit 48c converts the command of the second command system of the first command system. It converts into a command and transmits to the control part 44, and the control part 44 performs the predetermined process according to the content of the request signal based on this command. As a part of such processing, the control unit 44 of the receiving device 40 transmits a confirmation signal transmission instruction by a command of the first command system to the compatible processing unit 48c as necessary, and the compatible processing unit 48c The command of the first command system is converted into the command of the second command system and output to the second basic processing unit 48b, and the second basic processing unit 48b receives the confirmation signal via the antenna 45 after performing carrier sense. Is transmitted in the 950 MHz band, which is the same frequency band as the received signal (SA5).

  When this confirmation signal is received by the repeater 30, the second basic processing unit 38b of the second signal processing unit 38 of the repeater 30 converts this confirmation signal into a command of the second command system, and the compatible processing unit 38c. The compatibility processing unit 38c converts the command of the second command system into a command of the first command system and transmits the command to the control unit 34. The control unit 34 determines whether the confirmation signal needs to be relayed based on the command. Make a decision. When relaying, the control unit 34 transmits a relay instruction by a command of the first command system to the compatible processing unit 38c, and the compatibility processing unit 38c converts the command of the first command system into a command of the second command system. Is output to the second basic processing unit 38b, and the second basic processing unit 38b performs carrier sensing and transmits the confirmation signal in the 950 MHz band via the antenna 35 (SA6).

  When the confirmation signal from the receiving device 40 is directly received by the portable setting device 20 or when it is received by the portable setting device 20 via the repeater 30, the portable setting device 20 receives the confirmation signal. Is processed by the control unit 28, and predetermined processing corresponding to the content of the confirmation signal is performed.

  In the process shown in FIG. 6, it is not assumed that a signal is transmitted from the receiving device 40 to the security terminal 3, but when the reception function is also provided in the security terminal 3, Signal transmission may be performed. In this case, when the signal to the security terminal 3 is received from the receiving device 40 in the 950 MHz band, the second basic processing unit 38b of the second signal processing unit 38 of the repeater 30 sends the confirmation signal to the second command. The command is converted into a command of the system and output to the compatibility processing unit 38c. The compatibility processing unit 38c converts the command of the second command system into a command of the first command system and transmits the command to the control unit 34. The control unit 34 Based on the command, it is determined whether or not the confirmation signal is relayed. When relaying, the control unit 34 outputs a relay instruction based on a command of the first command system to the first signal processing unit 37. When receiving the relay instruction, the first signal processing unit 37 transmits the signal to the security terminal 3 via the antenna 35 at a frequency of 426 MHz band. As a result, the 950 MHz band radio signal from the receiving device 40 is relayed to the crime prevention terminal 3 as a 426 MHz band radio signal.

  In addition, when the crime prevention system 1 is provided with a plurality of repeaters 30, communication between the crime prevention terminal 3 or the portable setting device 20 and the reception device 40 is performed via the plurality of repeaters 30. Sometimes. Hereinafter, the relay processing via the plurality of repeaters 30 will be described. However, specific relay processing such as command conversion can be performed in the same manner as the relay processing between the security terminal 3 or the portable setting device 20 and the receiving device 40.

  Usually, the repeater 20 receives a signal transmitted by itself directly by a final transmission destination or indirectly by a final transmission destination via another repeater 20. Cannot be specified in advance at the time of signal transmission. Therefore, when the final transmission destination is the reception device 40 (that is, when the signal from the security terminal 3 or the portable setting device 20 is relayed to the reception device 40), the final transmission destination is the portable setting device. 20 (that is, when the signal from the receiving device 40 is relayed to the portable setting device 20), the signal may be transmitted in the 950 MHz band via the second signal processing unit 38. When a typical transmission destination is the security terminal 3 (that is, when a signal from the receiving device 40 is relayed to the security terminal 3), it is assumed that the security terminal 3 can receive the signal directly, Transmission is performed in the 426 MHz band via the first signal processing unit 37.

  However, the signal transmitted by the repeater 20 is directly received by the final destination or indirectly received by the final destination via the other repeater 20. It is also conceivable that this can be specified in advance at the time of signal transmission. For example, when the transmission source transmits a signal, the device ID of the transmission destination is included in the signal, and the device that has received the signal has a device ID in which the device ID included in the signal is registered in advance. It is conceivable that the signal is relayed only when it matches. Alternatively, there may be a case where the crime prevention terminal 3 and the receiving device 40 are separated from each other and wireless communication is physically impossible unless a plurality of repeaters 30 are used. In such a case, the repeater 30 can identify in advance that the signal is transmitted via the other repeater 30 even when the final transmission destination is the security terminal 3. In this case, the signal may be transmitted in the 950 MHz band via the second signal processing unit 38, and the relay speed between the repeaters 30 may be improved.

(effect)
As described above, according to the present embodiment, even when a radio signal in the first frequency band and a radio signal in the second frequency band are received from the security device, these radio signals are received in the second frequency band. Since it transmits to the apparatus 40, it becomes possible to improve the communication speed from the repeater 30 to the receiver 40 compared with the case where it relays with a 1st frequency band.

  In addition, since the carrier sense is performed when the radio signal is transmitted to the receiving device 40 in the second frequency band, the signal collision is compared with the case where the relay is performed without performing the carrier sense while maintaining the first frequency band. The probability of communication can be reduced, and the reliability of communication can be improved.

  Further, when a radio signal in the first frequency band is received from the security device, the radio signal is converted into a radio signal in the second frequency band and transmitted, so that the radio signal in the first frequency band and the radio in the second frequency band are transmitted. Even if the command system differs from signal to signal, it is possible to relay a radio signal in the first frequency band in the second frequency band.

  In addition, when a radio signal in the first frequency band is received from the security terminal 3, the radio signal is transmitted to the receiving device in the second frequency band, so that the open / close sensor 10, the fire sensor 11, the human sensor 12, etc. The communication speed when relaying the output from the disaster prevention terminal to the receiving device 40 can be improved.

  Further, when a radio signal in the second frequency band is received from the portable setting device 20, this radio signal is transmitted to the receiving device 40 in the second frequency band, so that the output from the portable setting device 20 is received by the receiving device 40. It is possible to maintain the communication speed when relaying to the same as in the past.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. it can. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

(About the purpose and type of communication system)
In the above embodiment, the crime prevention system has been described. However, the present invention can be applied to a communication system of any purpose and type other than this, for example, a wireless residential fire as a terminal device in a disaster prevention system. Communication from a warning device or other battery-powered small wireless device to a receiver as a receiving device, or communication from a portable setting device as a terminal device to an engine starter as a receiving device in an automobile control system Even in this case, the present invention can be applied. The function of the repeater 30 may be built in the portable setting device 20.

(About signal transmission and reception)
The receiving device 40 receives a signal transmitted from the security sensor 2 in the first frequency band and receives a signal transmitted from the repeater 30 or the portable setting device 20 in the second frequency band. Transmission is not performed, and signal transmission to a security company or the like may be performed by wire if necessary.
In the above-described embodiment, the repeater 30 that has received the radio signal in the first frequency band from the security sensor 2 or the receiving device 40 transmits the radio signal in the second frequency band to another device. If the band was in use when carrier sense was performed, it would take a long time to wait until the use was canceled, and it would take a long time to communicate and delay the security alarm. When used, it may be sent as it is in the first frequency band.
The wireless signal from the security sensor 2 may reach the receiving device 40 directly or may reach the receiving device 40 via the repeater 30, and the receiving device 40 receives the same abnormality information twice or more. There is a possibility that the number of occurrences becomes unrecognizable, and the same abnormality alarm process is repeated each time it is received. In order to prevent this, the transmission source such as the security sensor 2 adds the transmission source ID and the signal ID to the reception device 40 and the repeater 30, and the received repeater 30 also transmits the transmission source ID and the signal of the security sensor 2. By adding the ID as it is and transmitting on the receiving device 40 side, the receiving device 40 may make it easy to manage whether it is the same as the already received abnormal signal.

(Signal frequency)
In the above embodiment, the 426 MHz band and the 950 MHz band are used together, but the other two frequency bands may be used together, or three or more frequency bands may be used together. In addition, the said numerical value of a frequency band is not limited.
In the above embodiment, the second frequency band uses a higher frequency band than the first frequency band, but may be a band having a higher communication speed than the first frequency band. Not exclusively. Or you may make it set the frequency band which performs carrier sense more reliable than signal transmission / reception of a 1st frequency band as a 2nd frequency band.

(About modularization)
In the above embodiment, only the wireless transmission / reception unit 41 of the receiving device 40 is unitized, but the wireless transmission / reception unit 31 of the repeater 30 may be unitized by the same structure as the wireless transmission / reception unit 41. Alternatively, as with the wireless transmission / reception unit 31, the wireless transmission / reception unit 41 may be incorporated into the reception device 40 without being unitized.

DESCRIPTION OF SYMBOLS 1,100 Security system 2 Security sensor 3 Security terminal 10, 101 Opening / closing sensor 11, 102 Fire sensor 12, 103 Human sensor 13, 104 Abnormal alarm light 20 Portable setting apparatus 40a, 41a Case 22 Button group 22a Emergency button 22b Start button 22c Security button 22d Release button 23 Indicator light group 23a Emergency light 23b Warning light 23c OK light 23d NG light 23e Security light 23f Release light 24, 31, 41 Wireless transceiver 24a, 35, 45 Antenna 28, 34, 44 Control Unit 28a signal processing unit 30, 105 repeater 36, 46 antenna side connection unit 37, 47 first signal processing unit 37a, 47a LPF
37b, 47b First basic processing unit 38, 48 Second signal processing unit 38a, 48a HPF
38b, 48b Second basic processing unit 38c, 48c Compatible processing unit 39, 49 Control unit side connection unit 40, 106 Receiver

Claims (6)

A wireless repeater that relays a wireless signal from a terminal device to a receiving device,
A first signal processing unit that performs transmission / reception processing of a radio signal of a predetermined first frequency band;
A second signal processing unit that performs transmission / reception processing with a radio signal having a higher communication speed than the first signal processing unit in a predetermined second frequency band different from the first frequency band,
When a radio signal in the first frequency band is received from the terminal device via the first signal processing unit, and a radio signal in the second frequency band is received from the terminal device via the second signal processing unit. In any case, the wireless signal is transmitted to the receiving device in the second frequency band via the second signal processing unit.
Wireless repeater. The second signal processing unit performs carrier sense when transmitting a radio signal in the second frequency band.
The wireless repeater according to claim 1. A radio signal converter that converts the radio signal of the first frequency band into the radio signal of the second frequency band;
When a radio signal in the first frequency band is received from the terminal device via the first signal processing unit, the received signal is converted into a radio signal in the second frequency band via the radio signal conversion unit. Converting and transmitting the converted radio signal to the receiving device in the second frequency band via the second signal processing unit,
The wireless repeater according to claim 1 or 2. The terminal device is a security terminal that transmits a radio signal in the first frequency band,
The wireless signal of the first frequency band received from the security terminal via the first signal processing unit is transmitted to the receiving device in the second frequency band via the second signal processing unit,
Transmitting the radio signal of the second frequency band received from the receiving device via the second signal processing unit to the security terminal in the first frequency band via the first signal processing unit;
The radio repeater according to any one of claims 1 to 3. The terminal device is a portable setting device that transmits a radio signal in the second frequency band,
The second frequency band radio signal received from the portable setting device is transmitted to the receiving device in the second frequency band via the second signal processing unit,
Transmitting the radio signal of the second frequency band received from the receiving device to the portable setting device in the second frequency band via the second signal processing unit;
The radio repeater according to any one of claims 1 to 4.   When a radio signal is transmitted in the second frequency band and carrier sensing is performed and another radio signal is being transmitted, the first signal processing unit transmits in the first frequency band. The wireless repeater according to claim 2.

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