JPH06140970A - Repeater - Google Patents

Abstract

PURPOSE:To obtain the repeater executing stably relaying by extending a talking available distance and correcting an attenuation of a radio wave due to an obstacle on a transmission path. CONSTITUTION:The radio wave sent from a base station 1 to a portable set 2 is attenuated by an obstacle (not shown) on the way of the portable equipment 2. Then the repeater 4 receives the attenuated radio wave by the antenna 5. Then the radio signal is received by the reception section 6 via a switch 10 thrown to the position of the reception section 6 and demodulated as data. The demodulated data are inputted to a base band LSI 17, in which slot control is executed. Then the data are modulated by a transmission section 8 and sent to the portable set 2 by a same frequency as that of the radio wave received from the antenna 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave relaying device which uses the TDMA-TDD system and is used in communication systems such as mobile phones and digital cordless phones that are capable of mobile communication.

[0002]

2. Description of the Related Art FIG. 10 is a simplified block diagram of a conventional communication system. In the figure, 1 is a base station, 2 is a portable device,
3 is an obstacle on the communication path, and the obstacle 3 corresponds to, for example, a window glass of a car in car telephone communication.

Next, the operation will be described. When the obstacle 3 exists on the communication path between the base station 1 and the portable device 2, the radio wave transmitted from the base station 1 is received by the portable device 2 after being attenuated by the influence of the obstacle 3. And the portable device 2 is
Data is demodulated using the attenuated radio waves. on the other hand,
Similarly, the radio wave transmitted from the portable device 2 is also affected by the obstacle 3, attenuated, and then received by the base station 1. Then, the base station 1 demodulates the data using the attenuated radio wave.

[0004]

Since the conventional communication system is configured as described above, when the obstacle 3 exists on the communication path between the base station 1 and the portable device 2, the obstacle 3 is present. However, there is a problem that the received radio wave is attenuated due to the influence of, and the communication quality is deteriorated.

The present invention has been made to solve the above-mentioned problems, and relays radio waves between the base station and the portable device without compromising the reception level attenuation and deteriorating the communication quality. The purpose is to obtain a relay device.

[0006]

A relay apparatus according to the present invention slot-exchanges data from a receiving section and sends it to a transmitting section at timings in which transmission / reception slot timing is shifted by a predetermined period corresponding to an empty slot. And a slot exchanging section for performing the same.

Further, a receiving antenna and a transmitting antenna, which are provided perpendicularly to the ground, are arranged at a distance where the two antennas are spatially isolated, and the carrier of the radio wave received by the receiving antenna is amplified by an amplifying section. , Is transmitted from the transmitting antenna.

[0008] Further, an outdoor antenna arranged outdoors, an indoor antenna arranged indoors, and a carrier of radio waves received by the outdoor antenna or the indoor antenna and transmitted from the indoor antenna or the outdoor antenna. An amplification section for amplifying the radio wave, a switch section for switching the transmission path and the reception path of the radio wave by the indoor antenna and the outdoor antenna, and a switch control section for controlling the switching of this switch section, and the transmission and reception of the radio wave by time division. Done,
The timing of switching the path of the switch unit by the switch control unit is performed using a control signal from the portable device.

[0009] Further, an outdoor antenna arranged outdoors, an indoor antenna arranged indoors, and a carrier of radio waves received by the outdoor antenna or the indoor antenna and transmitted from the indoor antenna or the outdoor antenna. , An amplification section for amplifying the radio wave, a switch section for switching between a radio wave transmission path and a reception path by an outdoor antenna and an outdoor antenna, and a synchronization control circuit for switching this switch section. The control circuit detects the transmission / reception state of radio waves from the signal line of the amplification section and controls the path switching timing of the switch section.

In a relay device for relaying radio waves, an outdoor antenna placed outdoors, an indoor antenna placed indoors, an outdoor antenna or an indoor antenna receives and receives from an indoor antenna or an outdoor antenna. An amplification unit for amplifying a carrier of a radio wave to be transmitted, a switch unit for switching between a radio wave transmission route and a reception route by an indoor antenna and an outdoor antenna, a switch control unit for controlling switching of the switch unit, and an outdoor antenna Or it has a connection part that detects the radio wave reception state of the indoor antenna and connects the signal line to the amplification part, and transmits and receives radio waves by time division, and the switch control part switches the route of the switch part to receive the radio wave by the connection part. It is controlled by a state detection signal.

Further, a magnetic field antenna is provided in each of the outdoor antenna and the switch section, and the outdoor antenna and the switch section are magnetically coupled.

[0012]

The relay device according to the present invention corrects the attenuation of received radio waves due to obstacles by slot exchange of radio signals by the throat exchanging unit during transmission and reception of radio waves. In addition, the reception antenna and the transmission antenna that are provided perpendicularly to the ground are spatially isolated, and the amplification unit amplifies the carrier of the radio wave to correct the attenuation of the received radio wave and transmit.

Further, the transmission and reception of radio waves by the indoor antenna and the outdoor antenna are performed in a time division manner, and the switch section for switching the transmission / reception path is controlled by the control signal from the portable unit, so that the relay operation is reliably synchronized and stable. The relay can be done. Further, by transmitting and receiving radio waves by the indoor antenna and the outdoor antenna in a time-sharing manner and controlling the switch unit for switching the transmission / reception path by the synchronization control circuit, the relay operation can be reliably synchronized and stable relay can be performed.

Further, by detecting the reception state of the radio waves of the outdoor antenna and the indoor antenna by the connecting portion and controlling the route switching timing of the switch portion by this detection signal, the relay operation is surely synchronized and stable. The relay can be performed, and the switch controller can be downsized. Further, by magnetically coupling the outdoor antenna and the switch unit with the magnetic field antenna, there is no need to physically connect the outdoor antenna and the switch unit.

[0015]

EXAMPLES Example 1. 1 is a block diagram of a relay device showing an embodiment of the present invention, and FIG. 2 is a slot timing diagram between a base station and a portable device. In the figure, 4 is a relay device main body, 5 is an antenna for both transmission and reception, 6 is a receiving section for demodulating data, and 7 is a baseband LS showing a slot exchanging section.
Reference numerals I and 8 denote a transmitting unit that modulates data to be transmitted, 9 a power supply circuit that generates a predetermined voltage necessary for operating the relay device 4, and 10 a switch for switching between transmission and reception.

Next, the operation will be described. First, the relay device 4 is installed in the middle of the base station 1 and the portable device 2. The radio wave transmitted from the base station 1 to the portable device 2 is attenuated by an obstacle (not shown) on the way to the portable device 2. Then, the relay device 4 receives the attenuated radio wave at the antenna 5. Then, the wireless signal is received by the receiving unit 6 via the switch 10 switched to the receiving unit 6 side and demodulated as data. This demodulated data is the baseband LS
It is input to I7 and slot control is performed. Then, the data is modulated by the transmitter 8 and transmitted to the portable device 2 at the same frequency as the radio wave received from the antenna 5.

Here, the slot control will be described with reference to FIG. In the figure, T indicates transmission data and S indicates reception data. In the radio wave relay from the base station 1 to the portable device 2, the radio wave is transmitted from the base station 1 to the relay device 4 in the time width (slot) t ₇ , and then from the relay device 4 to the portable device 2 in the time width t ₁₁ . Radio waves are transmitted. Further, when the radio wave is relayed from the portable device 2 to the base station 1, the radio wave is transmitted from the portable device 2 to the relay device 4 in the time width t ₁ , and then the relay device 4 is transmitted in the time width t _5.
The radio wave is transmitted from the base station 1 to the base station 1. The above is repeated in time to relay the radio waves between the base station 1 and the portable device 2. In addition, in FIG. 2, the timing is shifted by 1/2 cycle.

Example 2. In the first embodiment described above, the frequencies of the received radio wave and the transmitted radio wave are the same, but as shown in FIG. 3, the high speed synthesizer 11 is provided and frequency control is performed to the reception unit 6 or the transmission unit 8 to transmit and receive the received radio wave. The frequency of the radio wave may be converted. As a result, even if radio waves of the same frequency are used near the relay device 4, it is possible to prevent interference.

Example 3. In the first and second embodiments, the received radio wave is demodulated by the receiving unit 6 and relayed by slot exchange. However, the carrier itself of the received radio wave is amplified and retransmitted as a radio wave for relaying. Good. 4 is a block diagram of a relay device showing an embodiment of the present invention, and FIG. 5 is an installation diagram when the relay device is installed outdoors. In the figure, 11 is a relay device main body, 12 is a receiving antenna, 13 is a transmitting antenna, 14 is an amplifier circuit showing an amplifying section, 15 is a power supply circuit for generating a predetermined voltage necessary for operating the relay device, and 16 is a relay. It is a steel tower to which the device 11 is attached.

Next, the operation will be described. The radio wave transmitted from the base station 1 is input to the amplifier circuit 11 via the receiving antenna 12. Then, the amplifier circuit 11
The carrier of the radio wave is amplified by and is transmitted to the portable device 2 again as a radio wave from the transmitting antenna 13. Here, the receiving antenna 12 and the transmitting antenna 13 have a predetermined distance interval such that spatial isolation can be obtained,
Moreover, it is provided perpendicular to the ground.

Further, the relay operation is performed by using the carrier frequency which is the same as and synchronized with the base station 1, thereby extending the reach of the radio wave between the base station 1 and the portable device 2 and supporting the tracking exchange operation. .

Next, an actual use example will be described with reference to FIG. First, the relay device 11 is installed on the steel tower 16 of the power line. Then, the base station 1 and the portable device 2 are arranged within a range where the radio waves reach the steel tower 16, and the relay device 1 relays the transmission and reception of the radio waves of the base station 1 and the portable device 2. Where base station 1
Also, the portable device 2 may move freely within a range where radio waves reach the tower 16. In addition, the number of relay devices 11 is not limited to one, and a plurality of relay devices 11 may be provided in another plurality of steel towers 16.

Example 4. Next, the relay device indoors and outdoors, or inside and outside the vehicle will be described. FIG. 6 is a block diagram of a relay device showing an embodiment of the present invention. In the figure, 17 is a relay device main body, 18 is an outdoor antenna, 19
Is an indoor antenna, 20 is an amplifier circuit for amplifying a signal,
21 and 22 are switches for switching between transmission and reception, and 23
Is a switch control circuit for controlling the switch, 24 is a power supply circuit that generates a predetermined voltage necessary for operating the relay device 17, and 26 and 27 are connected to the indoor antenna 19 and the outdoor antenna 18 and the relay device body 17. It is a cable. In addition, the portable device 2 provides a transmission / reception switching control signal and is used indoors.

Next, the operation will be described. The radio wave transmitted from the outdoor base station 1 is input to the amplifier circuit 20 via the outdoor antenna 18, the cable 27, and the switch 22. Then, it is amplified by the amplifier circuit 20 and transmitted to the indoor portable device 2 by the indoor antenna 19 via the switch 21 and the cable 26. Radio waves from the indoor portable device 2 are input to the amplifier circuit 20 via the indoor antenna 19, the cable 26, and the switch 21, are amplified by the amplifier circuit 20, and are used for the outdoor via the switch 22 and the cable 27. It is transmitted from the antenna 18 to the outdoor base station 1. Here, the portable device 2 is connected to the switch control circuit 23, and the timing of switching with the switches 21 and 22 is time-divisionally controlled by a control signal from the portable device 2 when transmitting and receiving radio waves.

Example 5. In the fourth embodiment, the relay device 1
Although the transmission / reception switching timing of 7 is performed by the control signal from the portable device 2, a cordless telephone or the like can be used as a specific example of the portable device 2.

Example 6. In the fourth embodiment, the relay device 1
Although switching of transmission / reception of 7 is performed by the control signal from the portable device 25, a synchronization circuit may be provided inside the relay device and the control signal may be obtained from the synchronization control circuit. FIG. 7 is a block diagram of a relay device showing an embodiment of the present invention. In the figure, 28 is a synchronous control circuit,
The signal line of the amplifier circuit 20 detects the signal transmission / reception state, and controls the switching timing of the switches 21 and 22.

Example 7. Further, for switching the relay device 17, a coupler may be provided inside the control signal relay device and the layer reception of the antenna may be detected by this coupler. FIG. 8 is a block diagram of a relay device showing an embodiment of the present invention.
In the figure, 29 and 30 are couplers that detect the presence or absence of a signal, and indicate couplers.

Next, the operation will be described. When a radio wave is transmitted from the outdoor base station 1 to the outdoor antenna 18, the coupler 29 detects the arrival of the radio wave and notifies the switch control circuit 23 of the arrival. The switch control circuit 23 controls the switches 21 and 22 based on this incoming call, and forms a signal path from the outdoor antenna 18 to the indoor antenna 19. Then, the amplifier circuit 20 amplifies the signal and transmits the radio wave from the indoor antenna 19 to the indoor portable device 2.

When a radio wave is transmitted from the indoor portable unit 2 to the indoor antenna 19, the coupler 30 detects the arrival of the radio wave and informs the switch control circuit 23 of the arrival. The switch control circuit 23 then switches the switches 21 and 2.
2 to control the outdoor antenna 18 to the indoor antenna 1
A signal path to 9 is formed, an amplifier circuit 20 amplifies the signal, and a radio wave is transmitted from the outdoor antenna 18 to the outdoor base station 1. As described above, the switch control circuit 23 can be downsized by detecting the transmission / reception of radio waves by the coupler,
The switch control circuit 23 can be simply configured.

Example 8. In the above embodiment, the outdoor antenna 18 and the relay device body 17 are connected by the cable 27, but the relay device body 17 and the outdoor antenna 18 may be connected by magnetic field coupling. FIG. 9 is a block diagram of a relay device showing an embodiment of the present invention. In the figure, 31 and 32 are loop antennas for magnetic field coupling, which are magnetic field antennas. The loop antenna 31 is connected to the outdoor antenna 18, and the loop antenna 32 is connected to the switch 22.

Next, the operation of magnetic field coupling will be described.
For example, in car telephone communication, the outdoor antenna 18
Is provided outside the vehicle body, and the loop antenna 31 is provided outside the rear glass. Further, the loop antenna 32 is provided inside the rear glass of the vehicle. Then, the relay device 17 and the indoor antenna 19 are installed inside the vehicle, and the portable device 2 is installed near the driver's seat.

Then, when radio waves are transmitted from the base station 1 to the automobile in which the relay device 17 is installed, the radio waves are received by the outdoor antenna 18 and sent to the loop antenna 31.
Then, the loop antennas 31, 32 via the rear glass
The signal is conducted to the loop antenna 32 by the magnetic coupling of. After that, after sending a signal from the loop antenna 32 to the switch 22, the same signal processing as in the above-described embodiment is performed, radio waves are transmitted from the indoor antenna 19 to the portable device 25, and the driver uses the portable device 25. And listen.

Transmission from the portable device 2 is performed in the reverse path to that described above, and the signal is conducted to the loop antenna 31 from the loop antenna 32 by magnetic coupling, and the radio wave is transmitted from the outdoor antenna 18 to the base station 1. .

[0034]

Since the present invention is configured as described above, it is possible to extend the callable distance between a portable device or a base station / portable device, and to connect an outdoor portable device or a base station to an indoor unit. The transmission and reception performance between portable devices can be improved,
Furthermore, there is an effect that usability is improved.

[Brief description of drawings]

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

FIG. 2 is a slot timing diagram of the relay device according to the first embodiment of the present invention.

FIG. 3 is a block diagram of a relay device showing a second embodiment of the present invention.

FIG. 4 is a block diagram of a relay device showing a third embodiment of the present invention.

FIG. 5 is an installation diagram of a relay device showing a third embodiment of the present invention.

FIG. 6 is a block diagram of a relay device showing a fourth embodiment of the present invention.

FIG. 7 is a block diagram of a relay device showing a sixth embodiment of the present invention.

FIG. 8 is a block diagram of a relay device showing a seventh embodiment of the present invention.

FIG. 9 is a block diagram of a relay device showing an eighth embodiment of the present invention.

FIG. 10 is a simplified block diagram of a conventional outdoor communication system.

[Explanation of symbols]

 1 base station 2 portable device 4 relay device 5 antenna 7 baseband LSI 10 switch 11 high-speed synthesizer 12 receiving antenna 13 transmitting antenna 14 amplifier circuit 17 relay device 18 outdoor antenna 19 indoor antenna 20 amplifier circuit 21 switch 22 switch 23 Switch control circuit 25 Portable device 28 Synchronous control circuit 29 Coupler 30 Coupler 31 Loop antenna 32 Loop antenna

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[Procedure amendment]

[Submission date] November 27, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

Example 5. In the fourth embodiment, the relay device 1
Although the transmission / reception switching timing of 7 is performed by the control signal from the portable device 2, a specific example of the portable device 2 is a digital cordless telephone.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

Example 6. In the fourth embodiment, the relay device 1
Although switching of transmission / reception of 7 is performed by the control signal from the portable device 25, a synchronization circuit may be provided inside the relay device and the control signal may be obtained from the synchronization control circuit. FIG. 7 is a block diagram of a relay device showing an embodiment of the present invention. In the figure, 28 is a synchronous control circuit,
By processing the signal from the amplifier circuit 20, the transmission / reception state of the signal is detected, and the switching timing of the switches 21 and 22 is controlled.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

Example 7. Further, switching of the relay device 17 a coupler provided within the control signal repeater may sense the sending and receiving status of radio wave by the coupler. FIG. 8 is a block diagram of a relay device showing an embodiment of the present invention.
In the figure, 29 and 30 are couplers that detect the presence or absence of a signal, and indicate couplers.

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (6)

[Claims] 1. A relay device for relaying radio waves transmitted and received between a base station and a portable device, a receiving section for receiving the radio wave from the base station or the portable device and demodulating it into data, and the mobile device for modulating the data. Slot for transmitting data from the receiving section to the transmitting section at the timing of shifting the transmission / reception slot timing by a predetermined period corresponding to an empty slot, and the transmitting section for transmitting radio waves to a base station or a base station. A relay device comprising a switching unit. 2. A relay device for relaying radio waves, comprising: a reception antenna and a transmission antenna provided vertically to the ground; and an amplification section for amplifying a radio wave carrier, wherein the reception antenna and the transmission antenna are spatially isolated. A relay device, which is arranged at a predetermined distance, a carrier of a radio wave received by the receiving antenna is amplified by the amplifying unit, and is transmitted from the transmitting antenna. 3. A relay device having a portable device placed indoors for relaying radio waves, the outdoor antenna being placed outdoors, the indoor antenna being placed indoors, and the outdoor antenna or indoors. An amplification unit for amplifying a carrier of a radio wave received by the indoor antenna and transmitted from the indoor antenna or the outdoor antenna, and a switch unit for switching the transmission path and the reception path of the radio wave by the indoor antenna and the outdoor antenna, A switch control unit that controls switching of the switch unit is provided, and transmission and reception of radio waves are performed in a time division manner, and the route switching timing of the switch unit by the switch control unit is controlled by a control signal from the portable device. Relay device. 4. In a relay device for relaying radio waves, an outdoor antenna arranged outdoors, an indoor antenna arranged indoors, the outdoor antenna or the indoor antenna, and the indoor antenna or An amplification unit for amplifying a carrier of a radio wave transmitted from an outdoor antenna, a switch unit for switching a transmission route and a reception route of a radio wave by the indoor antenna and the outdoor antenna, and a synchronous control circuit for switching the switch unit. A relay device, wherein radio waves are transmitted and received by time division, and the synchronization control circuit detects a radio wave transmission / reception state from a signal line of the amplification section to control a path switching timing of the switch section. 5. In a relay device for relaying radio waves, an outdoor antenna arranged outdoors, an indoor antenna arranged indoors, the outdoor antenna or the indoor antenna, and the indoor antenna or An amplification unit that amplifies a carrier of a radio wave transmitted from an outdoor antenna, a switch unit that switches a transmission route and a reception route of a radio wave by the indoor antenna and the outdoor antenna, and a switch control unit that controls switching of the switch unit. And a connection unit that detects a radio wave reception state by the outdoor antenna or the indoor antenna and connects a signal line to the amplification unit, performs transmission and reception of radio waves by time division, and the switch unit by the switch control unit. Is controlled by a detection signal of a radio wave reception state by the connecting portion. Relay device. 6. The relay device according to claim 3, wherein a magnetic field antenna is provided in each of the outdoor antenna and the switch unit, and the outdoor antenna and the switch unit are magnetically coupled to each other.