JP6498326B1 - Wireless relay system - Google Patents

Abstract

A wireless relay system capable of quickly starting relay of wireless communication between a fixed base station and a user apparatus over a mobile communication network of a plurality of communication operators after moving to a target position with a simple configuration. provide.
A movable first radio relay station transmits / receives a plurality of first frequency radio signals to / from a plurality of fixed base stations, and transmits a plurality of second frequency radio signals to / from a second radio relay station. Radio signals are transmitted and received, frequency conversion between the first frequency and the second frequency is performed for each communication operator, and the signal power after frequency conversion is adjusted to be equal among a plurality of communication operators. The second radio relay station transmits / receives a plurality of second frequency radio signals to / from the first radio relay station, and transmits / receives a plurality of first frequency radio signals to / from the user apparatus, for each communication operator. The frequency conversion between the first frequency and the second frequency is performed, and the signal power after the frequency conversion is adjusted to be equal among a plurality of communication operators.
[Selection] Figure 1

Description

  The present invention relates to a wireless relay system.

    Conventionally, antennas for relays and mobile stations are used in weak electric field areas such as dead areas, mountain areas, and maritime areas where there are obstacles that interfere with line-of-sight propagation between antennas on fixed base stations on the ground. A wireless relay system that performs wireless relay using a mooring balloon equipped with a wireless relay station having an antenna is known (see, for example, Patent Document 1).

JP, 2006-002973, A

  In the conventional wireless relay system, since it is difficult to perform wireless communication between the fixed base station and the wireless relay station mounted on the mooring balloon in the out-of-service area of the fixed base station, the fixed base station and the user apparatus (mobile station) There is a possibility that the wireless communication between them cannot be relayed. Therefore, a base station (eNodeB) function is mounted on a vehicle that can move on the ground, moves to a destination, and a radio relay station (base station) including a base station and a frequency converter mounted on the vehicle that has moved to the destination. A wireless relay system that relays wireless communication between the base station and the user apparatus (mobile station) by performing wireless communication between the mobile station and the wireless relay station (child device) of the moored balloon.

  However, this wireless relay system has the following problems. Since the base unit is composed of a base station device (eNodeB) and a frequency converter, the configuration is complicated. Further, it is necessary to connect the base station device (eNodeB) of the parent device to the core network of the mobile communication network by wire or wirelessly, and the operation is complicated. Furthermore, since the operation of the wireless relay must be performed by the person in charge of the communication operator, when the site is very far away, the operator of the communication operator arrives at the site, and then the master unit installed in the vehicle It takes a lot of time for a specialized communication operator to connect the base station and the core network of the mobile communication network by wire or to set up the system parameters of the base station. Takes time. In addition, when a part of the cell of the fixed base station and the cell of the radio relay station (master unit, slave unit) overlap, interference due to the same frequency occurs, so the cell of the fixed base station and the radio relay station ( It is necessary to avoid interference by preparing different frequencies between the cells of the parent device and the child device. In particular, when wireless relay is simultaneously performed for the mobile communication networks of a plurality of communication operators, it is necessary to perform the connection and setup for each communication operator, so that the time until the start of operation at the site is further increased.

  Such a problem is not limited to the case where the user-side radio relay station that performs radio communication with the user apparatus (mobile station) is a radio relay station of a moored balloon, but also by autonomous control or by remote control from outside. It can occur in the same way even in the case of a radio relay station mounted on an airborne mobile body (aircraft such as a drone) that can stay or move in the airspace.

A radio relay system according to an aspect of the present invention is a radio relay system that relays radio communication between a fixed base station and a user apparatus of a plurality of communication operators whose radio signal frequencies are different from each other. 1 radio relay station and a 2nd radio relay station located in a position higher than the 1st radio relay station. The first radio relay station includes a first radio communication unit that transmits and receives radio signals of a plurality of first frequencies different from each other corresponding to the plurality of fixed base stations with the fixed base stations of the plurality of communication operators. A second radio communication unit that transmits and receives radio signals of a plurality of second frequencies different from each other corresponding to the plurality of communication operators with the second radio relay station, and the first frequency and the second frequency A frequency conversion unit that performs frequency conversion, and a signal power adjustment unit that adjusts the signal power after frequency conversion to be equal to each other among the plurality of communication operators. The second radio relay station transmits and receives the plurality of second frequency radio signals to and from the first radio relay station, and a plurality of first frequency between user devices and the first radio communication unit. A second radio communication unit that transmits and receives radio signals, a frequency conversion unit that performs frequency conversion between the first frequency and the second frequency, and signal power after frequency conversion are made equal among the plurality of communication operators. And a signal power adjustment unit for adjusting the signal power.
In the radio relay system, the signal power adjustment unit of each of the first radio relay station and the second radio relay station selectively allows a signal having a frequency of the communication operator to pass through each of the plurality of communication operators. You may have a filter and the amplifier with an automatic gain adjustment which adjusts so that the signal power after passing the band filter may become predetermined power.
Further, in the wireless relay system, the first wireless relay station may be a plurality of directional antennas whose orientations can be adjusted or controlled so as to track the fixed base stations of the plurality of communication operators, or the plurality You may provide the adaptive antenna which consists of several elements which can form a beam so that each fixed base station of these communication operators may be tracked.

A radio relay system according to another aspect of the present invention is a radio relay system that relays radio communication between a fixed base station and a user apparatus of a plurality of communication operators having different radio signal frequencies,
A movable first radio relay station and a second radio relay station positioned higher than the first radio relay station are provided. The first radio relay station includes a first radio communication unit that transmits and receives radio signals of a plurality of first frequencies different from each other corresponding to the plurality of fixed base stations with the fixed base stations of the plurality of communication operators. A second radio communication unit that transmits and receives radio signals of a plurality of second frequencies different from each other corresponding to the plurality of communication operators with the second radio relay station, and the first frequency and the second frequency A frequency conversion unit that performs frequency conversion. The second radio relay station transmits and receives the plurality of second frequency radio signals to and from the first radio relay station, and a plurality of first frequency between user devices and the first radio communication unit. A second wireless communication unit that transmits and receives wireless signals; and a frequency conversion unit that performs frequency conversion between the first frequency and the second frequency. The first radio relay station has a plurality of directional antennas whose directions can be adjusted or controlled so as to track the fixed base stations of the plurality of communication operators, or the fixed base stations of the plurality of communication operators, respectively. And an adaptive antenna composed of a plurality of elements capable of forming a beam so as to track the signal.

In the radio relay system, for each of the plurality of communication operators, the first frequency and the second frequency are the interference of radio signals in the first radio relay station and the interference of radio signals in the second radio relay station. The frequency may be different so as not to occur.
In the wireless relay system, the first wireless relay station may be mounted on a mobile body that can move on the ground.
In the wireless relay system, the second wireless relay station may be mounted on a balloon.
In the wireless relay system,
The first radio relay station may be mounted on a mobile body, and the balloon on which the second radio relay station is mounted may be moored on another mobile body different from the mobile body.
In the wireless relay system, the second wireless relay station may be mounted on a flying object that stays or moves in a predetermined airspace by autonomous control or by external control.
In the wireless relay system, the first wireless relay station may be mounted on a mobile body, and the mobile body may be provided with a separation / departure unit on which the flying body can be separated.
In the radio relay system, the first radio relay station may be a directional antenna whose direction can be controlled to track the second radio relay station, or a beam so as to track the second radio relay station. You may provide the adaptive antenna which consists of a plurality of elements which can form.
Further, in the wireless relay system, the first wireless relay station may communicate between the wireless signal between the fixed base station and the second wireless relay station according to control information from the outside for each of the plurality of communication operators. A control unit that performs ON / OFF control of the relay with the wireless signal may be provided.
Also, in the wireless relay system, the second wireless relay station is information indicating at least one of a state of transmission and reception of a wireless signal with a user apparatus having the first frequency for each of the plurality of communication operators. May be provided to a predetermined external destination.

  According to the present invention, after moving to a target position with a simple configuration, it is possible to quickly start relaying wireless communication between a fixed base station and a user apparatus for a mobile communication network of a plurality of communication operators.

1 is a schematic configuration diagram illustrating an example of an overall configuration of a communication system including a wireless relay system according to an embodiment of the present invention. The schematic block diagram which shows an example of the whole structure of the communication system containing the radio relay system which concerns on other embodiment. The block diagram which shows an example of the principal part structure of the 1st radio relay station (master | base_unit) of the radio relay system which concerns on embodiment. The block diagram which shows an example of the principal part structure of the 2nd wireless relay station (slave machine) of the wireless relay system which concerns on embodiment. The block diagram which shows one structural example of the 1st wireless relay station (master | base_station) corresponding to the downlink and uplink bidirectional | two-way wireless relay of the wireless relay system which concerns on embodiment. (A)-(d) is a figure which shows the frequency characteristic of the signal of a downlink and an uplink in the wireless relay system of FIG. 5, and the characteristic BPF of a bandpass filter. The block diagram which shows one structural example of the 2nd wireless relay station (slave unit) corresponding to the downlink and uplink bidirectional | two-way wireless relay of the wireless relay system which concerns on embodiment. (A)-(d) is a figure which shows the frequency characteristic of the signal of a downlink and an uplink, and the characteristic BPF of a band filter in the radio relay system of FIG. The block diagram which shows the other structural example of the 1st wireless relay station (master | base_station) corresponding to the downlink and uplink bidirectional | two-way wireless relay of the wireless relay system which concerns on embodiment. The block diagram which shows the further another structural example of the 1st radio relay station (master | mobile_unit) corresponding to the downlink and uplink bidirectional | two-way radio relay of the radio relay system which concerns on embodiment. FIG. 6 is a block diagram showing an example of a remote control system in a downlink signal processing path of the first radio relay station (master unit) in FIG. 5. (A)-(d) is explanatory drawing of the output pattern of the received signal of the downlink before frequency conversion in the remote control of the 1st radio relay station (master | mobile_unit) of FIG. 11, respectively. (E)-(h) is explanatory drawing of the output pattern of the received signal of the uplink before frequency conversion in the remote control of the 1st radio relay station (master | mobile_unit) of FIG. 11, respectively. The block diagram which shows the other example of the remote control system in the downlink signal processing path | route of the 1st wireless relay station (master | base_unit) of FIG. The schematic block diagram which shows the whole structure of the communication system containing the radio relay system which concerns on a comparative example. (A) to (d) are frequency characteristics of received signals in the downlink signal processing path of the first radio relay station (master unit) and the uplink signal processing path of the second radio relay station (slave base unit) in FIG. The figure which shows the frequency characteristic of the transmission signal after frequency conversion, and the characteristic of a band pass filter. (A) to (d) are frequency characteristics and frequencies of received signals in the downlink signal processing path of the second radio relay station (slave unit) and the uplink signal processing path of the first radio relay station (base unit) in FIG. The figure which shows the frequency characteristic of the transmission signal after conversion, and the characteristic of a band filter. The block diagram which shows the further another structural example of the 1st radio relay station (master | mobile_unit) corresponding to the downlink and uplink bidirectional | two-way radio relay of the radio relay system which concerns on embodiment. (A) to (f) show the frequency characteristics, frequency conversion and power adjustment of the received signal received by the antenna in the downlink signal processing path and uplink signal processing path of the first radio relay station (master unit) in FIG. The figure which shows the frequency characteristic of the received signal after performing, and the frequency characteristic of the transmission signal transmitted from an antenna. The block diagram which shows the other structural example of the 2nd wireless relay station (slave unit) corresponding to the downlink and uplink bidirectional | two-way wireless relay of the wireless relay system which concerns on embodiment. (A) to (f) show the frequency characteristics, frequency conversion and power adjustment of the received signal received by the antenna in the downlink signal processing path and the uplink signal processing path of the second radio relay station (slave unit) in FIG. The figure which shows the frequency characteristic of the received signal after performing, and the frequency characteristic of the transmission signal transmitted from an antenna. The block diagram which shows the further another structural example of the 1st radio relay station (master | mobile_unit) corresponding to the downlink and uplink bidirectional | two-way radio relay of the radio relay system which concerns on embodiment. The block diagram which shows the further another structural example of the 1st radio relay station (master | mobile_unit) corresponding to the downlink and uplink bidirectional | two-way radio relay of the radio relay system which concerns on embodiment. FIG. 18 is a block diagram showing an example of a remote control system in a downlink signal processing path and an uplink signal processing path of the first radio relay station (master unit) in FIG. 17. The block diagram which shows the other example of the remote control system in the downlink signal processing path | route and uplink signal processing path | route of the 1st radio relay station (master) of FIG. Explanatory drawing explaining the advantage of the wireless relay system which concerns on embodiment. (A) And (b) is explanatory drawing explaining the other advantage of the wireless relay system which concerns on embodiment. Explanatory drawing explaining the further another advantage of the radio relay system which concerns on embodiment. (A) And (b) is explanatory drawing explaining the further another advantage of the wireless relay system which concerns on embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram illustrating an example of an overall configuration of a communication system including a wireless relay system according to an embodiment of the present invention. In FIG. 1, the radio relay system according to the present embodiment includes a first radio relay station (hereinafter also referred to as “master unit”) 10 and a second radio relay station (hereinafter also referred to as “slave unit”) 20. . The first radio relay station (base unit) 10 and the second radio relay station (slave unit) 20 are connected to the core networks of the mobile communication networks 80A and 80B of a plurality of communication operators A and B having different radio signal frequencies. The wireless communication between the plurality of fixed base stations 30A and 30B such as the macro cell base station and the plurality of mobile stations 40A and 40B as user apparatuses respectively corresponding to the plurality of communication operators A and B is simultaneously relayed. In the present embodiment, the case where the number of communication operators (fixed base stations) is two will be described, but the number of communication operators (fixed base stations) may be three or more. In FIG. 1, the number of mobile stations corresponding to each of the communication operators A and B is 1, but the number of mobile stations corresponding to each of the communication operators A and B may be two or more.

  The mobile communication networks 80A and 80B may be provided with remote control devices 81A and 81B (control sources), respectively. The remote control devices 81A and 81B hold, for example, information on the first radio relay station 10 and the second radio relay station 20, and transmit control information to at least one of the first radio relay station 10 and the second radio relay station 20. be able to. The remote control devices 81A and 81B may function as information transmission destinations and receive information from at least one of the first radio relay station 10 and the second radio relay station 20. The remote control devices 81A and 81B may be provided in addition to the mobile communication networks 80A and 80B as long as they can communicate with the first radio relay station 10 and the second radio relay station 20. The control of the first radio relay station 10 and the second radio relay station 20 may be performed by both the remote control devices 81A and 81B, or may be performed by either one of the remote control devices 81A and 81B. Good.

  The first radio relay station 10 is also referred to as a first frequency to be relayed to the fixed base stations 30A and 30B (hereinafter referred to as “radio relay frequency” or “base station side frequency”) for each of the communication operators A and B. ) F1A (downlink signal) and F1A ′ (uplink signal) (hereinafter collectively referred to as “F1A / F1A ′”) and F1B (downlink signal) and F1B ′ (uplink signal) (hereinafter collectively referred to as “F1B / F2A (downstream signal) and F2A ′ (upstream signal) (hereinafter referred to as “F1B ′”) and the second frequency (hereinafter also referred to as “intermediate frequency”) between the wireless signal of “F1B ′” and the second radio relay station 20. And F2B (downlink signal) and F2B ′ (uplink signal) (hereinafter collectively referred to as “F2B / F2B ′”) are relayed. It is a frequency conversion type wireless relay device, Can be moved on the ground of the target position by being mounted in an automobile 50 is both.

  The vehicle 50 on which the first wireless relay station 10 is mounted includes a battery, a generator, or the like that can supply power to the first wireless relay station 10 for a long time, such as an electric vehicle, a hybrid vehicle, and a fuel cell vehicle. It may be. In the configuration example of FIG. 1, the first wireless relay station 10 is incorporated in the automobile 50, but the moving body in which the first wireless relay station 10 is incorporated is a vehicle other than the automobile traveling on the road. Alternatively, it may be a railway vehicle traveling on a track, an aircraft, a ship on a river or the sea, and the like. In addition, the moving body in which the first radio relay station 10 is incorporated is a flying body that stays or moves in a predetermined airspace by autonomous control or by external control, such as a small helicopter (for example, drone) that can be remotely controlled. Also good.

  For each of the communication operators A and B, the second radio relay station 20 transmits radio signals of second frequencies (intermediate frequencies) F2A / F2A ′ and F2B / F2B ′ between the first radio relay station 10 and the mobile station 40A. , 40B to be relayed with a first frequency (hereinafter also referred to as “radio relay frequency” or “mobile station side frequency”) F1A / F1A ′, F1B / F1B ′ radio signal. The wireless relay device can be positioned higher than the first wireless relay station 10 by being mounted on a balloon 60 such as a moored balloon.

  Balloon 60 is a dead zone, a mountain area, a marine area where obstacles such as mountains and high-rise buildings that obstruct the propagation of radio communication radio waves exist between antennas 31A and 31B of fixed base stations 30A and 30B. You may install in the sky above weak electric field areas. The balloon 60 is supported by being moored by a mooring line (main mooring line) extending upward from the anchor base on the ground so as to be disposed at a position of several tens to several hundreds m from the ground, for example. The anchor base only needs to be able to anchor the balloon 60 by fixing the lower end of the mooring line (main mooring line), and is not limited to a specific shape or size. The balloon 60 may be moored in the automobile 50 on which the first radio relay station 10 is mounted as an anchor base. Further, when the balloon 60 is disposed above the sea, the anchor base may be provided on a sea buoy or a ship.

  As shown in FIG. 2, the second radio relay station 20 may be mounted on a flying body 70 such as a drone that stays or moves in a predetermined airspace by autonomous control or by control from the outside. In this case, the automobile 50 on which the first radio relay station 10 is mounted may include a takeoff / departure unit on which the flying object 70 can take off / depart.

  First frequency (relay target frequency) F1A / F1A ′, F1B / F1B ′ and second frequency (intermediate frequency) F2A converted for each of the communication operators A and B in the first radio relay station 10 and the second radio relay station 20, respectively. / F2A ′ and F2B / F2B ′ are different from each other so that wraparound interference between radio signals transmitted and received by the first radio relay station 10 and wraparound interference between radio signals transmitted and received by the second radio relay station 20 do not occur. Is the frequency. For example, the first frequencies (relay target frequencies) F1A / F1A ′ and F1B / F1B ′ are frequencies in the 2.1 GHz band, and the second frequencies (intermediate frequencies) F2A / F2A ′ and F2B / F2B ′ are in the 3.3 GHz band. May be the frequency.

  FIG. 3 is a block diagram illustrating an example of a main configuration of the first radio relay station 10 of the radio relay system according to the embodiment. In FIG. 3, the first radio relay station 10 includes a first radio communication unit 11, a second radio communication unit 12, a frequency conversion unit 13, and a control unit 14 that controls each unit.

  The first wireless communication unit 11 receives the first frequency (relay target frequency) F1A / F1A ′, F1B that is the base station side frequency with the fixed base stations 30A, 30B via the first antenna 101 for the fixed base station. / F1B ′ radio signal is transmitted and received. The second radio communication unit 12 communicates with the second radio relay station (slave unit) 20 via the second antenna 102 for the radio relay station. The second frequency (intermediate frequency) F2A / F2A ′, F2B / F2B ′ Send and receive wireless signals. Each of the first wireless communication unit 11 and the second wireless communication unit 12 may include an amplifier (for example, a low noise amplifier for reception and a power amplifier for transmission). The first wireless communication unit 11 and the second wireless communication unit 12 have a function of adjusting the signal power after frequency conversion to be equal between the plurality of communication operators A and B for each of the communication operators A and B. May be.

  For each of the communication operators A and B, the frequency conversion unit 13 is connected between the first radio communication unit 11 and the second radio communication unit 12 with the first frequencies F1A / F1A ′, F1B / F1B ′ and the second frequencies F2A / F2A. Perform frequency conversion with ', F2B / F2B'. The frequency converter 13 includes, for example, a frequency converter that converts the first frequencies F1A / F1A ′ and F1B / F1B ′ into second frequencies F2A / F2A ′ and F2B / F2B ′, and second frequencies F2A / F2A ′ and F2B. A frequency converter that converts / F2B ′ to the first frequencies F1A / F1A ′ and F1B / F1B ′ may be used.

  The radio signal relayed by the first radio relay station 10 may be transmitted / received by using, for example, an OFMDA communication method compliant with LTE or LTE-Advanced standards. In this case, good communication quality can be maintained even if multipaths with different radio signal delays occur.

  The first antenna 101 of the first radio relay station 10 may be an omnidirectional antenna, or a plurality of directivities whose directivity directions can be adjusted in the directions of the fixed base stations 30A and 30B of the plurality of communication operators A and B, respectively. May be a sex antenna. Further, the first antenna 101 of the first radio relay station 10 may be a directional antenna whose direction can be controlled so as to track the fixed base stations 30A and 30B of the communication operators A and B, or a fixed base station. It may be an adaptive antenna (for example, an adaptive array antenna) composed of a plurality of elements capable of forming a beam so as to track each of the stations 30A and 30B.

  The second antenna 102 of the first radio relay station 10 may be an omnidirectional antenna or a directional antenna whose direction can be controlled so as to track the second radio relay station 20, or the second radio relay. An adaptive antenna (for example, an adaptive array antenna) composed of a plurality of elements capable of forming a beam so as to track the station 20 may be used.

  The control unit 14 can control each unit by executing a program incorporated in advance.

  When receiving control information from the remote control devices 81A and B (control sources) of the communication operators A and B of the plurality of mobile communication networks 80A and B or transmitting information to the remote control devices 81A and B A user terminal (mobile station) 15 as a control communication terminal connected to the control unit 14 may be provided. The user terminal (mobile station) 15 may be, for example, a mobile communication module that can be easily incorporated into a device. The control unit 14 receives, for example, control information transmitted from the remote control devices 81A and 81B via the fixed base stations 30A and 30B by the user terminal (mobile station) 15, and based on the control information, the communication operator The wireless relay function of A or the wireless relay functions of both communication operators A and B may be controlled to be turned on / off. Here, the communication between the remote control devices 81A and 81B and the user terminal (mobile station) 15 is, for example, an IP address (or telephone) assigned to each of the remote control devices 81A and 81B and the user terminal (mobile station) 15. Number or MAC address).

  Further, the control unit 14 transmits at least radio signals to and from the fixed base stations 30A and 30B including the first frequencies F1A / F1A ′ and F1B / F1B ′ via the user terminal (mobile station) 15. Information indicating one situation and position information of the radio relay station, and / or status of at least one of transmission and reception of radio signals with the second radio relay station 20 having the second frequencies F2A / F2A ′ and F2B / F2B ′ The wireless relay information indicating the position information of the wireless relay station may be controlled to be transmitted to the remote control devices 81A and 81B of the communication operators A and B of the mobile communication. For example, the operator of mobile communication turns on / off the signal to the second radio relay station 20 by turning on / off the radio relay function of the first radio relay station 10 based on the received radio relay information. If it is predicted that interference will occur in the service area of another fixed base station, it can be controlled not to interfere by turning it off. For example, when it is not necessary to transmit a radio wave until the drone arrives at the relay place, it is possible to turn off the control so that the radio wave is not transmitted.

  FIG. 4 is a block diagram illustrating an example of a main part configuration of the second radio relay station 20 of the radio relay system according to the embodiment. 4, the second radio relay station 20 includes a first radio communication unit 21, a second radio communication unit 22, a frequency conversion unit 23, and a control unit 24 that controls each unit.

  The first radio communication unit 21 transmits radio signals of second frequencies (intermediate frequencies) F2A / F2A ′ and F2B / F2B ′ to and from the first radio relay station 10 via the first antenna 201 for the radio relay station. Send and receive. The second wireless communication unit 22 transmits the first frequency (relay target frequency) F1A / F1A ′ and F1B / F1B, which are the mobile station side frequencies, to and from the mobile stations 40A and 40B via the second antenna 202 for the mobile station. Send and receive 'radio signals. The first radio communication unit 21 and the second radio communication unit 22 may each include an amplifier (for example, a low noise amplifier for reception and a power amplifier for transmission). The first wireless communication unit 21 and the second wireless communication unit 22 have a function of adjusting the signal power after frequency conversion to be equal between the plurality of communication operators A and B for each of the communication operators A and B. May be.

  For each of the communication operators A and B, the frequency conversion unit 23 is connected between the first radio communication unit 21 and the second radio communication unit 22 with the first frequencies F1A / F1A ′, F1B / F1B ′ and the second frequencies F2A / F2A. Perform frequency conversion with ', F2B / F2B'. The frequency converter 23 includes, for example, a frequency converter that converts the first frequencies F1A / F1A ′ and F1B / F1B ′ into second frequencies F2A / F2A ′ and F2B / F2B ′, and second frequencies F2A / F2A ′ and F2B. A frequency converter that converts / F2B ′ to the first frequencies F1A / F1A ′ and F1B / F1B ′ may be used.

  The radio signal relayed by the second radio relay station 20 may be transmitted / received using, for example, an OFMDA communication system that conforms to the LTE or LTE-Advanced standard. In this case, the radio signal received from the fixed base station and the radio signal received from the second radio relay station 20 are equivalent to multipaths having different delays, and good communication quality is maintained by receiving radio signals of a plurality of paths. it can.

  The first antenna 201 of the second radio relay station 20 may be a directional antenna whose direction can be controlled so as to track the first radio relay station 10, or so as to track the first radio relay station 10. It may be an adaptive antenna (for example, an adaptive array antenna) composed of a plurality of elements capable of forming a beam.

  The control unit 24 can control each unit by executing a preinstalled program.

  When receiving control information from the remote control devices 81A and 81B of the communication operators A and B of the plurality of mobile communication networks 80A and 80B or transmitting information to the remote control devices 81A and 81B, the control unit 24 You may provide the user terminal (mobile station) 25 as a control communication terminal connected to the control part 14 connected to. The user terminal (mobile station) 25 may be, for example, a mobile communication module that can be easily incorporated into a device. For example, the control unit 24 receives control information transmitted from the remote control devices 81A and 81B via the fixed base stations 30A and 30B and the wireless relay system by the user terminal (mobile station) 25, and based on the control information. Thus, only the wireless relay function of the communication operator A or both the wireless relay functions of the communication operators A and B may be controlled to be turned on / off. Here, the communication between the remote control devices 81A, 81B and the user terminal (mobile station) 25 is, for example, an IP address (or telephone) assigned to each of the remote control devices 81A, 81B and the user terminal (mobile station) 25. Number or MAC address).

  Further, the control unit 24 transmits at least transmission and reception of radio signals to and from the first radio relay station 10 including the second frequencies F2A / F2A ′ and F2B / F2B ′ via the user terminal (mobile station) 25. At least one of the wireless relay information indicating the situation and the position information of the wireless relay station and the transmission and reception of the wireless signal between the mobile stations 40A and 40B including the first frequencies F1A / F1A ′ and F1B / F1B ′ The wireless relay information indicating the situation and the position information of the wireless relay station may be controlled to be transmitted to the remote control devices 81A and 81B of the communication operator of mobile communication.

  FIG. 5 is a block diagram illustrating a configuration example of the first radio relay station (master unit) 10 that supports downlink and uplink bidirectional radio relay of the radio relay system according to the embodiment. This configuration example is an example in which an omnidirectional antenna is used for each of the first antenna 101 on the fixed base station side and the second antenna 102 on the slave unit side. In FIG. 5, parts similar to those in FIG.

FIGS. 6A to 6D are diagrams showing frequency characteristics of downlink and uplink signals and bandpass filter characteristics BPF in the wireless relay system of FIG.
FIG. 6A shows received signals of the first frequencies F1A and F1B of the respective communication operators A and B received by the first antenna 101 in the downlink signal processing path of the first radio relay station (master unit) 10 of FIG. It is a figure which shows the frequency characteristic of S _R1A and S _R1B .
FIG. 6B shows frequency characteristics and bands of the transmission signals S _T2A and S _T2B of the second frequencies F2A and F2B after frequency conversion in the downlink signal processing path of the first radio relay station (master unit) 10 of FIG. It is a figure which shows the characteristic BPF of a filter.
FIG. 6C shows the second frequencies F2A ′ and F2B ′ of the communication operators A and B received by the second antenna 102 in the uplink signal processing path of the first radio relay station (master unit) 10 of FIG. It is a figure which shows the frequency characteristic of received signal S _{R2A '} and S _R2B' .
FIG. 6D shows the transmission signals S _{T1A ′} and S _{T1B ′} of the first frequencies F1A ′ and F1B ′ after frequency conversion in the uplink signal processing path of the first radio relay station (master unit) 10 of FIG. It is a figure which shows the frequency characteristic of and the characteristic BPF of a bandpass filter.

In FIG. 5, the first wireless communication unit 11 includes a DUP (Duplexer: duplexer) 110, a fixed base station side downlink reception signal processing unit, and a fixed base station side uplink transmission signal processing unit. . The DUP 110 performs path separation between the downlink path of the reception signal received by the first antenna 101 and the uplink path of the transmission signal toward the first antenna 101.
The downlink received signal processing unit on the fixed base station side includes a receiving amplifier 111 and a downlink radio relay switching unit 118. Downlink wireless relay switching unit 118, received signal distribution unit 112, ON / OFF switching unit 113A and band filter 114A for communication operator A, ON / OFF switching unit 113B and band filter 114B for communication operator B, A reception signal combining unit 115.
The uplink transmission signal processing unit on the fixed base station side includes a band filter 116 for communication operators A and B and a common amplifier (for example, linear amplifier) 117 having an automatic gain control (AGC) function.

  The ON / OFF switching units 113A and 113B may be configured by switches or attenuators (ATT), for example.

The band filter 114A selectively passes the reception signal S _R1A of the first frequency F1A of the communication operator A among the downlink reception signals S _R1A and S _R1B of the communication operators A and B shown in FIG. a band pass filter, bandpass filter 114B is a bandpass filter for selectively passing the received signal S _R1B the first frequency F1B communication operator B.

Further, the band filter 116 passes both uplink transmission signals S _{T1A ′} and S _{T1B ′} of the first frequencies F1A ′ and F1B ′ after the frequency conversion of the communication operators A and B shown in FIG. It is a band pass filter.

  If the level of the received signal received from the fixed base stations 30A and 30B via the first antenna 101 is sufficiently high, the receiving amplifier 111 need not be provided. In addition, when the ON / OFF switching control of the downlink wireless relay is not performed, the reception signal distribution unit 112, the ON / OFF switching units 113A and 113B, the band filters 114A and 114B, and the reception that configure the downlink wireless relay switching unit 118 are performed. The signal synthesis unit 115 may not be provided.

In FIG. 5, the frequency converter 13 includes a downlink frequency converter 131 and an uplink frequency converter 132. The frequency converter 131 converts the first frequencies F1A and F1B of the received signals S _R1A and S _R1B into second frequencies F2A and F2B, which are intermediate frequencies for relaying the master unit and the slave unit, in the downlink signal processing path. On the other hand, the frequency converter 132 uses the second frequencies F2A ′ and _{F2B ′} of the transmission signals S _{T2A ′} and S _{T2B ′} , which are intermediate frequencies for relaying the master unit and the slave unit, in the uplink signal processing path. The first frequencies F1A ′ and F1B ′ are converted.

In FIG. 5, the second wireless communication unit 12 includes a DUP 120, a downlink reception signal processing unit on the slave unit side, and an uplink transmission signal processing unit on the slave unit side. The DUP 120 performs path separation between the uplink path of the reception signal received by the second antenna 102 and the downlink path of the transmission signal transmitted by the second antenna 102.
The downlink reception signal processing unit on the handset side includes a band filter 126 for communication operators A and B and a common amplifier (for example, a linear amplifier) 127 with an automatic gain control (AGC) function.
Further, the uplink transmission signal processing unit on the handset side includes a receiving amplifier 121 and an uplink wireless relay switching unit 128. The uplink radio relay switching unit 128 includes a reception signal distribution unit 122, an ON / OFF switching unit 123A and a band filter 124A for the communication operator A, an ON / OFF switching unit 123B and a band filter 124B for the communication operator B, A reception signal combining unit 125.

  The ON / OFF switching units 123A and 123B may be configured by switches or attenuators (ATT), for example.

Bandpass filter 124A is a communication operator A shown in FIG. 6 (c), the received signal _{S R2A} uplink B _{', S R2B'} among the 'received signal _{S R2A'} of the second frequency F2A corresponding to the communication operator A The band-pass filter 124B is a band-pass filter that selectively passes the received signal _{SR2B ′} having the second frequency F2B ′ corresponding to the communication operator B.

Further, as shown in FIG. 6 (b), the band filter 126 passes the band through which the downlink transmission signals S _T2A and S _T2B of the second frequencies F2A and F2B after the frequency conversion of the communication operators A and B are passed. It is a filter.

  If the level of the received signal received from the slave unit 20 via the second antenna 102 is sufficiently high, the receiving amplifier 121 may not be provided. Further, when ON / OFF switching control of the uplink wireless relay is not performed, the reception signal distribution unit 122, the ON / OFF switching units 123A and 123B, the band filters 124A and 124B that constitute the uplink wireless relay switching unit 128, and The reception signal synthesis unit 125 may not be provided.

In the first radio relay station (master unit) 10 of the configuration example of FIG. 5, when relaying downlink radio communication from the fixed base stations 30A and 30B to the mobile stations 40A and 40B, the fixed is made via the first antenna 101. The received signals S _R1A and S _R1B of the first frequencies F1A and F1B received from the base stations 30A and 30B are amplified by the amplifier 111 of the first radio communication unit 11, and after passing through the downlink radio relay switching unit 118, It is output to the frequency converter 131. The received signals S _R2A and S _R2B converted from the first frequencies F1A and F1B to the second frequencies F2A and F2B by the frequency converter 131 pass through the band filter 126 of the second radio communication unit 12 to remove unnecessary signals. After being linearly amplified to a predetermined power (signal level) by the common amplifier 127, it is transmitted to the slave unit 20 via the second antenna 102 as downlink relay transmission signals S _T2A and S _T2B. .

On the other hand, in the first radio relay station (master unit) 10 in the configuration example of FIG. 5, when relaying uplink radio communication from the mobile stations 40A and 40B to the fixed base stations 30A and 30B, the second antenna 102 is used. Received signals S _{R2A ′} and S _{R2B ′} of the second frequencies F2A ′ and F2B ′ received from the slave unit 20 are amplified by the amplifier 121 of the second radio communication unit 12 and pass through the uplink radio relay switching unit 128 Is output to the frequency converter 132. The received signals S _{R1A ′} and S _{R1B ′} converted from the second frequencies F2A ′ and F2B ′ to the first frequencies F1A ′ and F1B ′ by the frequency converter 132 pass through the band filter 116 of the first radio communication unit 11. After unnecessary signals are removed and linearly amplified to a predetermined power (signal level) by the common amplifier 117, the fixed base stations 30A and 30B are transmitted via the first antenna 101 as transmission signals S _{T1A ′} and S _{T1B ′.} Sent to.

  FIG. 7 is a block diagram illustrating a configuration example of the second radio relay station (slave unit) 20 corresponding to the downlink and uplink bidirectional radio relays of the radio relay system according to the embodiment. This configuration example is used in combination with the first radio relay station (master unit) 10 of FIG. 5, and omnidirectional antennas are used for the first antenna 201 on the master unit side and the second antenna 202 on the mobile station side, respectively. It is an example. In FIG. 7, the same parts as those in FIG.

8A to 8D are diagrams showing frequency characteristics of downlink and uplink signals and bandpass filter characteristics BPF in the wireless relay system of FIG.
FIG. 8A shows received signals of the second frequencies F2A and F2B of the respective communication operators A and B received by the first antenna 201 in the downlink signal processing path of the second radio relay station (slave unit) 20 of FIG. It is a figure which shows the frequency characteristic of S _R2A and S _R2B .
FIG. 8B shows frequency characteristics and bandpass filters of the transmission signals S _T1A and S _T1B of the first frequencies F1A and F1B after frequency conversion in the downlink signal processing path of the second radio relay station (child unit) 20 of FIG. It is a figure which shows the characteristic BPF.
FIG. 8C shows the second frequencies F1A ′ and F1B ′ of the communication operators A and B received by the second antenna 202 in the uplink signal processing path of the second radio relay station (slave unit) 20 of FIG. It is a figure which shows the frequency characteristic of receiving signal S _{R1A '} and S _R1B' .
FIG. 8D shows the frequency of the transmission signals S _{T2A ′} and S _{T2B ′} of the second frequencies F2A ′ and F2B ′ after frequency conversion in the uplink signal processing path of the second radio relay station (slave unit) 20 of FIG. It is a figure which shows the characteristic and characteristic BPF of a band-pass filter.

In FIG. 7, the first wireless communication unit 21 includes a DUP 210, a base station side downlink reception signal processing unit, and a base unit side uplink transmission signal processing unit. The DUP 210 performs path separation between the downlink path of the reception signal received by the first antenna 201 and the uplink path of the transmission signal toward the first antenna 201.
The downlink reception signal processing unit on the base unit side includes a reception amplifier 211 and a downlink radio relay switching unit 218. The downlink radio relay switching unit 218 includes a received signal distribution unit 212, an ON / OFF switching unit 213A and a band filter 214A for the communication operator A, an ON / OFF switching unit 213B and a band filter 214B for the communication operator B, A reception signal adding unit 215.
The uplink transmission signal processing unit on the base unit side includes a band filter 216 for communication operators A and B and a common amplifier (for example, a linear amplifier) 217 with an automatic gain control (AGC) function.

  The ON / OFF switching units 213A and 213B may be configured by a switch or an attenuator (ATT), for example.

The band filter 214A selectively selects the reception signal S _R2A of the second frequency F2A corresponding to the communication operator A among the downlink reception signals S _R2A and S _R2B of the communication operators A and B shown in FIG. The band-pass filter 214B is a band-pass filter that selectively passes the reception signal _SR2B of the second frequency F2B corresponding to the communication operator B.

Further, the band filter 216 passes the uplink transmission signals S _{T2A ′} and S _{T2B ′} of the second frequencies F2A ′ and F2B ′ after the frequency conversion of the communication operators A and B shown in FIG. It is a band pass filter.

  Note that, when the level of a reception signal received from the parent device 10 via the first antenna 201 is sufficiently high, the reception amplifier 211 may not be provided. In addition, when the ON / OFF switching control of the downlink wireless relay is not performed, the reception signal distribution unit 212, the ON / OFF switching units 213A and 213B, the band filters 214A and 214B, which constitute the downlink wireless relay switching unit 218, and The reception signal adding unit 215 may not be provided.

In FIG. 7, the frequency conversion unit 23 includes a downlink frequency converter 231 and an uplink frequency converter 232. The frequency converter 231 converts the second frequencies F2A and F2B of the received signals S _R2A and S _R2B into the first frequencies F1A and F1B corresponding to the mobile station in the downlink signal processing path. On the other hand, the frequency converter 232 uses the first frequencies F1A ′ and F1B ′ of the transmission signals S _{T1A ′} and S _{T1B ′} corresponding to the mobile station in the uplink signal processing path as intermediate frequencies for relaying the master unit and the slave units. Two frequencies F2A ′ and F2B ′ are converted.

In FIG. 7, the second radio communication unit 22 includes a DUP 220, a downlink reception signal processing unit on the mobile station side, and an uplink transmission signal processing unit on the mobile station side. The DUP 220 performs path separation between the uplink path of the reception signal received by the second antenna 202 and the downlink path of the transmission signal transmitted by the second antenna 202.
The downlink received signal processing unit on the mobile station side includes a band filter 226 for communication operators A and B and a common amplifier (for example, a linear amplifier) 227 with an automatic gain control (AGC) function.
The uplink transmission signal processing unit on the mobile station side includes a reception amplifier 221 and an uplink radio relay switching unit 228. Uplink wireless relay switching unit 228 includes reception signal distribution unit 222, ON / OFF switching unit 223A and band filter 224A for communication operator A, ON / OFF switching unit 223B and band filter 224B for communication operator B, A reception signal combining unit 225.

  The ON / OFF switching units 223A and 223B may be configured by switches or attenuators (ATT), for example.

Bandpass filter 224A is a communication operator A shown in FIG. 8 (c), the received signal _{S R1A} uplink B _{', S R1B'} among the 'received signal _{S R1A'} of the first frequency F1A corresponding to the communication operator A the a selectively band-pass filter which passes bandpass filter 224B is selectively bandpass filter for passing a reception signal S _R1B the first frequency F1B 'corresponding to the communication operator B.

Further, as shown in FIG. 8 (b), the band filter 226 passes the band through which the downlink transmission signals S _T1A and S _T1B of both the first frequencies F1A and F1B after the frequency conversion of the communication operators A and B are passed. It is a filter.

  If the level of the received signal received from the mobile stations 40A and 40B via the second antenna 202 is sufficiently high, the receiving amplifier 221 need not be provided. When uplink radio relay ON / OFF switching control is not performed, the reception signal distribution unit 222, the ON / OFF switching units 223A and 223B, the band filters 224A and 224B, and the reception that configure the uplink radio relay switching unit 228 are also performed. The signal synthesis unit 225 may not be provided.

In the second radio relay station (slave unit) 20 in the configuration example of FIG. 7, when relaying downlink radio communication from the fixed base stations 30A and 30B to the mobile stations 40A and 40B, the parent radio station 20 The received signals S _R2A and S _R2B of the second frequencies F2A and F2B received from the device 10 are amplified by the amplifier 211 of the first radio communication unit 21, pass through the downlink radio relay switching unit 218, and then the frequency converter Is output to H.231. The received signals S _R1A and S _R1B converted from the second frequencies F2A and F2B to the first frequencies F1A and F1B by the frequency converter 231 pass through the band filter 226 of the second radio communication unit 22 to remove unnecessary signals. After being linearly amplified to a predetermined power (signal level) by the common amplifier 227, it is transmitted to the mobile stations 40A and 40B via the second antenna 202 as downlink transmission signals S _T1A and S _T1B. .

On the other hand, in the second radio relay station (slave unit) 20 of the configuration example of FIG. 7, when relaying uplink radio communication from the mobile stations 40A and 40B to the fixed base stations 30A and 30B, the second antenna 202 is used. The received signals S _{R1A ′} and S _{R1B ′} of the first frequencies F1A ′ and F1B ′ received from the mobile stations 40A and 40B are amplified by the amplifier 221 of the second radio communication unit 22, and the uplink radio relay switching unit 228 is received. Is output to the frequency converter 232. The received signals S _{R2A ′} and S _{R2B ′} converted from the first frequencies F1A ′ and F1B ′ to the second frequencies F2A ′ and F2B ′ by the frequency converter 232 pass through the band filter 216 of the first radio communication unit 21. After unnecessary signals are removed and linear amplification is performed up to a predetermined power (signal level) by the common amplifier 217, the signals are transmitted via the first antenna 201 as transmission signals S _{T2A ′} and S _{T2B ′} for uplink relay. Sent to the machine 10.

  FIG. 9 is a block diagram illustrating another configuration example of the first radio relay station (master unit) 10 that supports downlink and uplink bidirectional radio relay of the radio relay system according to the embodiment. This configuration example is an example in which a plurality of directional antennas 101A and 101B are used as the first antenna on the fixed base station side. In FIG. 9, the same parts as those in FIG. Also, as the second radio relay station (slave unit) 20 combined with the first radio relay station (base unit) 10 of this configuration example, the one illustrated in FIG. To do.

  In FIG. 9, the first antenna on the fixed base station side includes a plurality of directional antennas 101A and 101B having directivity directed to the fixed base stations 30A and 30B of a plurality of communication operators. Each of the directional antennas 101A and 101B has directivity so as to track each of the fixed base stations 30A and 30B of the plurality of communication operators A and B after the first radio relay station (master unit) 10 moves to the destination. It is configured so that the orientation can be adjusted. Note that the directional antennas 101A and 101B are a plurality of communication operators A and B based on position information and attitude information of the vehicle 50 equipped with the first radio relay station (master unit) 10 and the directional antennas 101A and 101B. The direction of directivity may be configured to be automatically controllable so as to track each of the fixed base stations 30A and 30B.

  The first wireless communication unit 11 includes a plurality of DUPs 110A and 110B and a plurality of communication operators A and B each having an automatic gain control (AGC) function so as to correspond to each of the plurality of directional antennas 101A and 101B. And a power adjustment unit. Each of the plurality of power adjustment units includes, for example, band-pass filters (BPF) 1111A and 1111B and amplifiers 1112A and 1112B having an automatic gain control (AGC) function. Band-pass filters (BPF) 1111A and 1111B selectively pass radio relay frequencies F1A 'and F1B' of communication operators A and B, respectively. The amplifiers 1112A and 1112B respectively set the powers of the reception signals of the radio relay frequencies F1A ′ and F1B ′ of the communication operators A and B that have passed through the band filters (BPF) 1111A and 1111B to a predetermined power Pr.

Uplink received signals S _{R1A ′} and S _{R1B ′} having the same predetermined power Pr distributed by received signal distributor 119 and adjusted by each power adjuster are respectively transmitted signals S _{T1A ′} and S _{T1B ′} as DUP 110A, 110B and the first antennas 101A and 101B are transmitted toward the mobile base stations 30A and 30B.

The downlink radio signal having the first frequency F1A transmitted from the fixed base station 30A of the communication operator A is received by the directional antenna 101A directed toward the fixed base station 30A, and the downlink radio relay is performed via the DUP 110A. Input to the switching unit 118. On the other hand, the downlink radio signal of the first frequency F1B transmitted from the fixed base station 30B of the communication operator B is received by the directional antenna 101B directed toward the fixed base station 30B, and is transmitted via the DUP 110B. Input to the link wireless relay switching unit 118.

  FIG. 10 is a block diagram illustrating still another configuration example of the first radio relay station (master) 10 corresponding to the downlink and uplink bidirectional radio relays of the radio relay system according to the embodiment. This configuration example is an example in which a plurality of directional antennas 101A and 101B are used as the first antenna on the fixed base station side, similarly to the configuration example of FIG. 10, the same parts as those in FIGS. 5 and 9 described above are denoted by the same reference numerals, and the description thereof is omitted. Also, as the second radio relay station (slave unit) 20 combined with the first radio relay station (base unit) 10 of this configuration example, the one illustrated in FIG. To do.

  In FIG. 10, the first wireless communication unit 11 has an automatic gain control (AGC) function for each of the plurality of DUPs 110A and 110B and the plurality of communication operators A and B so as to correspond to the plurality of directional antennas 101A and 101B, respectively. And a plurality of frequency converters 132A and 132B.

The uplink reception signals of the radio relay frequencies F2A ′ and F2B ′ of the communication operators A and B output from the second radio communication unit 12 are respectively sent to the first frequencies F1A ′ and F1B ′ by the frequency converters 132A and 132B. After frequency conversion, it is input to the power adjustment unit. Uplink reception signals S _{R1A ′} and S _{R1B ′} having the same predetermined power Pr adjusted by the respective power adjustment units are respectively transmitted signals S _{T1A ′} and S _{T1B ′} as DUPs 110A and 110B and first antennas 101A and 101B. To the mobile base stations 30A and 30B.

FIG. 11 is a block diagram showing an example of a remote control system in the downlink signal processing path of the first radio relay station (master unit) 10 of FIG. FIGS. 12A to 12D are explanatory diagrams of output patterns of downlink received signals S _R1A and S _R1B before frequency conversion in the remote control of the first radio relay station (master unit) in FIG. . _{12E to 12H} are explanatory diagrams of output patterns of uplink received signals S _{R1A ′} and S _{R1B ′} before frequency conversion in the remote control of the first radio relay station (master unit) in FIG. It is. In FIG. 11, parts similar to those in FIG. 5 described above are denoted by the same reference numerals, and description thereof is omitted.

  In FIG. 11, the first radio relay station (base unit) 10 includes user terminals (mobile stations) 15A and 15B as control communication terminals for the communication operators A and B, respectively, and the control unit 14 Remote control units 141A and 141B corresponding to the operators A and B are provided.

The remote control unit 141A receives control information A from the remote control device 81A of the communication operator A or transmits information to the remote control device 81A via the user terminal (mobile station) 15A and the fixed base station 30A. be able to.
For example, the remote control unit 141A controls the ON / OFF switching unit 113A of the downlink signal processing path based on the control information A received from the remote control device 81A of the communication operator A, and the frequency from the first wireless communication unit 11 the output of the down link received signal _{S R1A} of the first frequency F1A communication operators a output to the conversion unit 13, can be turned oN / OFF as shown in FIG. 12 (a) ~ (d) .
Further, for example, the remote control unit 141A controls the ON / OFF switching unit 123A of the uplink signal processing path based on the control information A received from the remote control device 81A of the communication operator A, and from the second wireless communication unit 12 The output of the uplink reception signal _{SR2A ′} of the second frequency F2A ′ of the communication operator A output to the frequency converter 13 can be turned ON / OFF as shown in FIGS.

Further, the remote control unit 141B receives control information B from the remote control device 81B of the communication operator B or transmits information to the remote control device 81B via the user terminal (mobile station) 15B and the fixed base station 30B. Can be.
For example, the remote control unit 141B controls the ON / OFF switching unit 113B of the downlink signal processing path based on the control information B received from the remote control device 81B of the communication operator B, and the frequency from the first wireless communication unit 11 the output of the down link received signal _{S R1B} the first frequency F1B communication operator B to be output to the conversion unit 13, can be turned oN / OFF as shown in FIG. 12 (a) ~ (d) .
Further, for example, the remote control unit 141B controls the ON / OFF switching unit 123B of the uplink signal processing path based on the control information B received from the remote control device 81B of the communication operator B, and from the second wireless communication unit 12 The output of the uplink reception signal _{SR2B ′} of the second frequency F2B ′ of the communication operator B output to the frequency converter 13 can be turned ON / OFF as shown in FIGS.

  FIG. 13 is a block diagram showing another example of the remote control system in the downlink signal processing path of the first radio relay station (master unit) 10 of FIG. In FIG. 13, the same parts as those in FIGS. 5 and 11 described above are denoted by the same reference numerals and description thereof is omitted.

  In the example of FIG. 13, a user terminal (mobile station) 15B corresponding to the communication operator B is provided as a control communication terminal common to a plurality of communication operators A and B. Further, the remote control device 81A of the communication operator A can communicate with a user terminal (mobile station) 15B provided in the first radio relay station (master unit) 10 via the mobile communication network 80B of the communication operator B. .

The remote control unit 141B receives control information B from the remote control device 81B of the communication operator B or transmits information to the remote control device 81B via the user terminal (mobile station) 15B and the fixed base station 30B. be able to.
For example, the remote control unit 141B controls the ON / OFF switching unit 113B of the downlink signal processing path based on the control information B received from the remote control device 81B of the communication operator B, and the frequency from the first wireless communication unit 11 the output of the down link received signal _{S R1B} the first frequency F1B outputted to the conversion unit 13, can be turned oN / OFF as shown in the aforementioned FIG. 12 (a) ~ (d) .
Further, for example, the remote control unit 141B controls the ON / OFF switching unit 123B of the uplink signal processing path based on the control information B received from the remote control device 81B of the communication operator B, and from the second wireless communication unit 12 The output of the uplink reception signal _{SR2B ′} of the second frequency F2B ′ output to the frequency converter 13 can be turned on / off as shown in FIGS. 12 (e) to 12 (h).

On the other hand, the remote control unit 141A is not connected to the user terminal (mobile station) 15A and the fixed base station 30A of the communication operator A but via the user terminal (mobile station) 15B of the communication operator B, the fixed base station 30B, and the mobile communication network 80B. Thus, the control information A from the remote control device 81A of the communication operator A can be received, or information can be transmitted to the remote control device 81A.
For example, the remote control unit 141A controls the ON / OFF switching unit 113A of the downlink signal processing path based on the control information A received from the remote control device 81A of the communication operator A, and the frequency from the first wireless communication unit 11 the output of the receiving signal _{S R1A} of the first frequency F1A communication operators a output to the conversion unit 13, can be turned oN / OFF as shown in the aforementioned FIG. 12 (a) ~ (d) .
Further, for example, the remote control unit 141A controls the ON / OFF switching unit 123A of the uplink signal processing path based on the control information A received from the remote control device 81A of the communication operator A, and from the second wireless communication unit 12 the output of the 'received signals _{S R2A'} of the second frequency F2A communication operators a to be output to the frequency converter 13 can be oN / OFF as shown in the aforementioned FIG. 12 (e) ~ (h) .

  In FIG. 13, a user terminal (mobile station) 15A corresponding to the communication operator A may be provided instead of the user terminal (mobile station) 15B of the communication operator A.

  Next, even if radio signal propagation paths (propagation loss) differ among a plurality of communication operators, the radio relay areas (for example, cells 200A and 200B of slave unit 20) of each communication operator at the relay destination are made uniform. An embodiment of a wireless relay system capable of performing the above will be described.

FIG. 14 is a schematic configuration diagram illustrating an overall configuration of a communication system including a wireless relay system according to a comparative example.
FIG. _15A shows the frequency characteristics of the received signals S _R1A and S _R1B of the first frequencies F1A and F1B received by the antenna in the downlink signal processing path of the first radio relay station (master unit) 10 of FIG. FIG. 15B is a diagram showing the frequency characteristics of the transmission signals S _T2A and S _T2B of the second frequencies F2A and F2B after the frequency conversion in the downlink signal processing path and the characteristics of the band filter.
FIG. 15C shows the received signals S _{R1A ′} and S _{R1B of} the first frequencies F1A ′ and F1B ′ received by the antenna in the uplink signal processing path of the second radio relay station (slave unit) 20 of FIG. _'it is a graph showing the frequency characteristics of FIG. 15 (d) is a second frequency F2A after frequency conversion in the uplink signal processing path', 'transmission signal _{S T2A of'} F2B, frequency characteristics and band of _{S T2B '} It is a figure which shows the characteristic of a filter.
16A shows the frequency characteristics of the received signals S _R2A and S _R2B of the second frequencies F2A and F2B received by the antenna in the downlink signal processing path of the second radio relay station (slave unit) 20 of FIG. FIG. 16B is a diagram showing the frequency characteristics of the transmission signals S _T1A and S _T1B of the first frequencies F1A and F1B after frequency conversion in the downlink signal processing path and the characteristics of the band filter. .
FIG. 16C shows the received signals S _{R2A ′} and S _{R2B of} the second frequencies F2A ′ and F2B ′ received by the antenna in the uplink signal processing path of the first radio relay station (master unit) 10 of FIG. _'is a graph showing the frequency characteristics of FIG. 16 (d) the first frequency F1A after frequency conversion in the uplink signal processing path', 'transmission signal _{S T1A of'} F1B, frequency characteristics and band of _{S T1B '} It is a figure which shows the characteristic of a filter.

In the downlink communication of the communication system of FIG. 14, since the propagation paths (propagation loss) between the fixed base stations 30 </ b> A and 30 </ b> B of the communication operators A and B and the base unit 10 are different, the base unit 10 receives the signals. The powers of the received signals S _R1A and S _R1B of the first frequencies (radio relay frequencies) F1A and F1B used by the respective communication operators A and B may be different (see FIG. 15A). Therefore, the transmission power of the second frequency (intermediate frequency) F2A and F2B after frequency conversion linearly amplified by the common amplifier in the parent device 10 is different (see FIG. 15B). As a result, there is a possibility that the radio relay areas (cells) 200A and 200B having different sizes at the first frequencies (radio relay frequencies) F1A and F1B of the communication operators A and B as shown in FIG.

Furthermore, between the downlink master unit 10 and the slave unit 20, the second frequencies (radio relay frequencies) F2A and F2B used by the plurality of communication operators A and B are different due to selective fading, etc. The propagation paths (propagation loss) between the parent device 10 and the child device 20 are different from each other, and the powers of the received signals S _R2A and S _R2B of the second frequencies (intermediate frequencies) F2A and F2B received by the child device 20 are different. (See FIG. 16A). Therefore, the powers of the transmission signals S _T1A and S _T1B of the first frequencies (radio relay frequencies) F1A and F1B after frequency conversion linearly amplified by the common amplifier in the slave unit 20 are different from each other (see FIG. 16B). As a result, there is a possibility that the radio relay areas (cells) 200A and 200B having different sizes at the first frequencies (radio relay frequencies) F1A and F1B of the communication operators A and B as shown in FIG.

Further, in the uplink communication of the communication system of FIG. 14, since the propagation paths (propagation loss) between the mobile stations 40A and 40B of the communication operators A and B and the slave unit 20 are different from each other, the slave unit 20 receives them. The received signals S _{R1A ′} and S _{R1B ′} of the first frequencies (radio relay frequencies) F1A ′ and F1B ′ used by the respective communication operators A and B may be different (see FIG. 15C). Therefore, the transmission powers of the second frequencies (intermediate frequencies) F2A ′ and F2B ′ after frequency conversion linearly amplified by the common amplifier in the slave unit 20 are different (see FIG. 15D). As a result, the base unit 10 can communicate with the mobile base stations 30A and 30B of the respective communication operators A and B in the uplink between the first frequencies (radio relay frequencies) F1A ′ and F1B ′ of the respective communication operators A and B. Wireless relay areas may be different from each other.

Furthermore, selective fading or the like due to different second frequencies (radio relay frequencies) F2A ′ and F2B ′ used by a plurality of communication operators A and B between the uplink parent device 10 and the child device 20 Therefore, the propagation paths (propagation loss) between the parent device 10 and the child device 20 are different from each other, and the received signals S _{R2A ′} , S of the second frequencies (intermediate frequencies) F2A ′, F2B ′ received by the parent device 10 The power of _{R2B ′} may be different (see FIG. 16C). Therefore, the powers of the transmission signals S _{T1A ′} and S _{T1B ′} of the first frequencies (radio relay frequencies) F1A ′ and F1B ′ after frequency conversion linearly amplified by the common amplifier in the base unit 10 are different from each other (FIG. )reference). As a result, the base unit 10 can communicate with the mobile base stations 30A and 30B of the respective communication operators A and B in the uplink between the first frequencies (radio relay frequencies) F1A ′ and F1B ′ of the respective communication operators A and B. Wireless relay areas may be different from each other.

  In the wireless relay system according to the present embodiment, transmission of at least one of the parent device 10 and the child device 20 is considered in consideration of the difference in propagation paths (propagation loss) in the plurality of communication operators A and B as shown in the following configuration example. The power may be adjusted. By adjusting the transmission power, the downlink and uplink propagation paths (propagation loss) between the fixed base stations 30A and 30B and the parent device 10 and between the parent device 10 and the child device 20 are changed to the communication operators A and B. Even if they are different from each other, the sizes of the wireless relay areas (cells) 200A and 200B in which the handset 20 can communicate with the mobile stations 40A and 40B can be made the same, and the base unit 10 can be the mobile base stations 30A and 30B. The wireless relay areas that can communicate with each other can be the same.

  FIG. 17 is still another example of the first radio relay station (master unit) 10 that adjusts the downlink and uplink transmission power corresponding to the downlink and uplink bidirectional radio relays of the radio relay system according to the embodiment. It is a block diagram which shows the example of a structure. In FIG. 17, the same parts as those in FIG.

18A shows the frequency characteristics of the received signals S _R1A and S _R1B of the first frequencies F1A and F1B received by the antenna in the downlink signal processing path of the first radio relay station (master unit) 10 of FIG. FIG. FIG. 18B is a diagram illustrating the frequency characteristics of the received signals S _R2A and S _R2B of the second frequencies F2A and F2B after performing frequency conversion and power adjustment in the downlink signal processing path of FIG. FIG. _18C is a diagram illustrating the frequency characteristics of the transmission signals S _T2A and S _T2B transmitted from the second antenna 102 in the downlink signal processing path of FIG.

18D shows the received signals S _{R2A ′} and S _{R2B of} the second frequencies F2A ′ and F2B ′ received by the antenna in the uplink signal processing path of the first radio relay station (master unit) 10 of FIG. It is a figure which shows the frequency characteristic of _' . FIG. _18E is a diagram showing the frequency characteristics of the received signals S _{R1A ′} and S _{R1B ′} of the first frequencies F1A ′ and F1B ′ after performing frequency conversion and power adjustment in the uplink signal processing path of FIG. is there. FIG. _18F is a diagram illustrating frequency characteristics of transmission signals S _{T1A ′} and S _{T1B ′} transmitted from the first antenna 101 in the uplink signal processing path of FIG.

In the first radio communication unit 11 of the first radio relay station (base unit) 10 in FIG. 17, there is no downlink radio relay switching unit 118 described above, and received signals of the first frequencies F1A and F1B received by the first antenna 101. S _R1A and S _R1B are directly input to the frequency converter 131. As shown in FIG. 18 (a), the power of the received signals S _R1A and S _R1B differs between the communication operators A and B. _Therefore , the received signals S _R2A and S R converted to the second frequencies F2A and _F2B by the frequency converter 131 are used. The power of _R2B also differs between communication operators A and B. The second radio communication unit 12 has an automatic gain control (AGC) function for each of the communication operators A and B so that the power of the reception signals S _R2A and S _R2B becomes the predetermined same power Pr shown in FIG. A plurality of power adjustment units 1210A and 1210B having Each of the plurality of power adjustment units 1210A and 1210B includes, for example, band filters (BPF) 1211A and 1211B that selectively pass radio relay frequencies F1A and F1B of the communication operators A and B as shown in FIG. Amplifiers 1212A and 1212B having an automatic gain control (AGC) function for setting the power of the reception signals of the radio relay frequencies F1A and F1B of the communication operators A and B that have passed through the band filters (BPF) 1211A and 1211B to a predetermined power Pr Prepare. The reception signals S _R2A and S _R2B having the same predetermined power Pr adjusted by the respective power adjustment units 1210A and 1210B are passed through the band filter 126 to remove unnecessary signals, and the common amplifier 127 has predetermined power (signal level). ) And then transmitted to the slave unit 20 via the second antenna 102 as transmission signals S _T2A and S _T2B shown in FIG. Note that the common amplifier 127 may not have an automatic gain control (AGC) function because the power adjustment units 1210A and 1210B adjust the power to a predetermined level.

In addition, the second radio communication unit 12 of the first radio relay station (master unit) 10 in FIG. 17 does not have the uplink radio relay switching unit 128 described above, and the second frequencies F2A ′ and F2B received by the second antenna 102. The received signals S _{R2A '} and S _R2B' are directly input to the frequency converter 132. As shown in FIG. 18 (d), since the power of the received signals S _{R2A ′} and S _{R2B ′} is different between the communication operators A and B, the received signals converted to the first frequencies F1A ′ and F1B ′ by the frequency converter 132. The power of S _{R1A ′} and S _{R1B ′} is also different between the communication operators A and B. The first radio communication unit 11 performs automatic gain control (AGC) for each of the communication operators A and B so that the power of the received signals S _{R1A ′} and S _{R1B ′} becomes the same predetermined power Pr shown in FIG. ) A plurality of power adjustment units 1110A and 1110B having functions. The plurality of power adjustment units 1110A and 1110B, for example, as shown in FIG. 18 (e), band filters (BPF) 1111A and 1111B that selectively pass the radio relay frequencies F1A ′ and F1B ′ of the communication operators A and B, respectively. And an amplifier 1112A having an automatic gain control (AGC) function for setting the power of the received signals of the radio relay frequencies F1A ′ and F1B ′ of the communication operators A and B that have passed through the band filters (BPF) 1111A and 1111B to a predetermined power Pr. , 1112B. The reception signals S _{R1A ′} and S _{R1B ′ having} the same predetermined power Pr adjusted by the respective power adjustment units _{1110A and 1110B} pass through the band filter 116, and unnecessary signals are removed. After being linearly amplified up to (signal level), transmission signals S _{T1A ′} and S _{T1B ′} shown in FIG. _18F are transmitted to the mobile base stations 30A and 30B via the first antenna 101. Note that the common amplifier 117 does not have to have an automatic gain control (AGC) function because the power adjustment units 1110A and 1110B adjust the power to a predetermined level.

  FIG. 19 is still another example of the second radio relay station (slave unit) 20 that adjusts the downlink and uplink transmission power corresponding to the downlink and uplink bidirectional radio relays of the radio relay system according to the embodiment. It is a block diagram which shows the example of a structure. In FIG. 19, the same parts as those in FIG.

FIG. 20A shows the frequency characteristics of the received signals S _R2A and S _R2B of the second frequencies F2A and F2B received by the antenna in the downlink signal processing path of the second radio relay station (slave unit) 20 of FIG. FIG. FIG. 20B is a diagram illustrating the frequency characteristics of the received signals S _R1A and S _R1B of the first frequencies F1A and F1B after performing frequency conversion and power adjustment in the downlink signal processing path of FIG. FIG. 20C is a diagram illustrating the frequency characteristics of the transmission signals S _T1A and S _T1B transmitted from the second antenna 202 in the downlink signal processing path of FIG.

FIG. 20D shows the received signals S _{R1A ′} and S1 of the first frequencies F1A ′ and F1B ′ received by the antenna 202 in the uplink signal processing path of the second radio relay station (slave unit) 20 of FIG. It is a figure which shows the frequency characteristic of _{R1B '} . FIG. 20 (e) is a diagram showing the frequency characteristics of the received signals S _{R2A ′} and S _{R2B ′} of the second frequencies F2A ′ and F2B ′ after performing frequency conversion and power adjustment in the uplink signal processing path of FIG. is there. FIG. 20 (f) is a diagram illustrating frequency characteristics of transmission signals S _{T2A ′} and S _{T2B ′} transmitted from the first antenna 201 in the uplink signal processing path of FIG.

In the first radio communication unit 21 of the second radio relay station (slave unit) 20 of FIG. 19, there is no downlink radio relay switching unit 218 described above, and the received signals of the second frequencies F2A and F2B received by the first antenna 201. S _R2A and S _R2B are directly input to the frequency converter 231. As shown in FIG. 20 (a), the powers of the received signals S _R2A and S _R2B are different between the communication operators A and B. Therefore, the received signals S _R1A and S converted to the first frequencies F1A and F1B by the frequency converter 231 are used. The power of _R1B also differs between communication operators A and B. The second radio communication unit 22 has an automatic gain control (AGC) function for each of the communication operators A and B so that the received signals S _R1A and S _R1B have the same predetermined power Pr shown in FIG. A plurality of power adjustment units 2210A and 2210B having Each of the plurality of power adjustment units 2210A and 2210B includes, for example, band filters (BPF) 2211A and 2211B that selectively pass the first frequencies F1A and F1B of the communication operators A and B as shown in FIG. Amplifiers 2212A and 2212 having an automatic gain control (AGC) function for setting the power of the received signals of the first frequencies F1A and F1B of the communication operators A and B that have passed through the band filters (BPF) 2211A and 2211B to a predetermined power Pr Prepare. The reception signals S _R1A and S _{R1B having} the same predetermined power Pr adjusted by the respective power adjustment units 2210A and 2210B pass through the band filter 226, and unnecessary signals are removed, and the common amplifier 227 receives predetermined power (signal level). ) And then transmitted to the mobile stations 40A and 40B via the second antenna 202 as transmission signals S _T1A and S _T1B shown in FIG. Note that the common amplifier 227 does not have to have an automatic gain control (AGC) function because the power adjustment units 2210A and 2210B adjust the power to a predetermined level.

In the second radio communication unit 22 of the second radio relay station (slave unit) 20 in FIG. 19, the uplink radio relay switching unit 228 is not provided, and the first frequencies F1A ′ and F1B ′ received by the second antenna 202 are not received. The received signals S _{R1A ′} and S _{R1B ′} are directly input to the frequency converter 232. As shown in FIG. 20 (d), the power of the received signals S _{R1A ′} and S _{R1B ′} is different between the communication operators A and B. _Therefore , the received signals S _R2A converted to the second frequencies F2A and _F2B by the frequency converter 232 are used. The power of _' , _SR2B' is also different between the communication operators A and B. The first radio communication unit 21 performs automatic gain control (AGC) for each of the communication operators A and B so that the power of the reception signals S _{R2A ′} and S _{R2B ′} becomes the same predetermined power Pr shown in FIG. ) A plurality of power adjustment units 2110A and 2110B having functions are provided. The plurality of power adjustment units 2110A and 2110B, for example, as shown in FIG. 20 (e), band filters (BPF) 2111A and 2111B that selectively pass the second frequencies F2A ′ and F2B ′ of the communication operators A and B, respectively. And an amplifier 2112A with an automatic gain control (AGC) function that sets the power of the received signals of the second frequencies F2A ′ and F2B ′ of the communication operators A and B that have passed through the band filters (BPF) 2111A and 2111B to a predetermined power Pr. , 2112B. The reception signals S _{R2A ′} and S _{R2B ′} having the same predetermined power Pr adjusted by the respective power adjustment units 2110A and 2110B are passed through the band filter 216, unnecessary signals are removed, and the common amplifier 217 has predetermined power ( After being linearly amplified up to (signal level), the transmission signals S _{T2A ′} and S _{T2B ′} shown in FIG. _20F are transmitted to the mobile base stations 30A and 30B via the first antenna 201. Note that the common amplifier 217 does not have to have an automatic gain control (AGC) function because the power adjustment units 2110A and 2110B adjust the predetermined power.

  FIG. 21 is still another example of the first radio relay station (base unit) 10 that performs the downlink and uplink transmission power adjustments corresponding to the downlink and uplink bidirectional radio relays of the radio relay system according to the embodiment. It is a block diagram which shows the example of a structure. This configuration example is an example in which a plurality of directional antennas 101A and 101B are used as the first antenna on the fixed base station side. In FIG. 21, the same parts as those in FIGS. 5, 9 and 17 described above are denoted by the same reference numerals, and the description thereof is omitted. Also, as the second radio relay station (slave unit) 20 combined with the first radio relay station (base unit) 10 of this configuration example, the one illustrated in FIG. To do.

In FIG. 21, downlink received signals S _R1A and S _R1B received by a plurality of directional antennas 101A and 101B having directivity directed to fixed base stations 30A and 30B of a plurality of communication operators A and B, After being synthesized by the reception signal synthesis unit 115, it is inputted to the frequency converter 131.

  FIG. 22 is still another example of the first radio relay station (master unit) 10 that performs downlink and uplink transmission power adjustment corresponding to the downlink and uplink bidirectional radio relays of the radio relay system according to the embodiment. It is a block diagram which shows the example of a structure. This configuration example is an example in which a plurality of directional antennas 101A and 101B are used as the first antenna on the fixed base station side. In FIG. 22, the same parts as those in FIGS. 5, 9, 10, and 17 are given the same reference numerals, and the description thereof is omitted. Also, as the second radio relay station (slave unit) 20 combined with the first radio relay station (base unit) 10 of this configuration example, the one illustrated in FIG. To do.

In FIG. 22, downlink received signals S _R1A and S _R1B received by a plurality of directional antennas 101A and 101B having directivity directed to fixed base stations 30A and 30B of a plurality of communication operators A and B, After being synthesized by the reception signal synthesis unit 115, it is inputted to the frequency converter 131.

  FIG. 23 is a block diagram illustrating an example of a remote control system in the downlink signal processing path and the uplink signal processing path of the first radio relay station (master unit) 10 in FIG. 17 that performs transmission power adjustment of the downlink and uplink. FIG. In FIG. 23, parts similar to those in FIGS. 11 and 17 described above are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 23, the remote control unit 141A includes, for example, a downlink signal processing path power adjustment unit 1210A and an uplink signal processing path power adjustment unit based on the control information A received from the remote control device 81A of the communication operator A. controls 1110A, 'uplink transmission signal _{S T1A of'} power adjustment unit 1210A and a power adjustment unit 1110A outputs and the first frequency of the second frequency F2A downlink transmission signal _{S T2A} communication operators a output from each F1A Can be turned ON / OFF as shown in FIGS. 12 (a) to 12 (h).

In addition, the remote control unit 141B includes, for example, the power adjustment unit 1210B for the downlink signal processing path and the power adjustment unit 1110B for the uplink signal processing path based on the control information B received from the remote control device 81B of the communication operator B. controlled, power adjustment unit 1210B and the power adjusting section 1110B second downlink frequency F2A transmission signal _{S T2A} output and the output of 'uplink transmission signal _{S T1B'} of the first frequency F1B communication operator B outputted from the respective Can be turned ON / OFF as shown in FIGS. 12 (a) to 12 (h).

  FIG. 24 is a block diagram showing another example of the remote control system in the downlink signal processing path of the first radio relay station (master unit) 10 of FIG. 17 that performs the downlink transmission power adjustment. In FIG. 24, parts similar to those in FIGS. 11, 12, 17, and 23 are given the same reference numerals, and description thereof is omitted.

In FIG. 24, the remote control unit 141B includes, for example, a downlink signal processing path power adjustment unit 1210B and an uplink signal processing path power adjustment unit based on the control information B received from the remote control device 81B of the communication operator B. controls 1110B, uplink transmission signal _{S T1B} power adjustment unit 1210B and the power adjustment unit 1110B output and first frequency F1B downlink transmission signal _{S T2B} of the second frequency F2B communication operator B to be output to the respective ' The output of _' can be turned ON / OFF as shown in FIGS. 12 (a) to 12 (h).

On the other hand, the remote control unit 141A is not the user terminal (mobile station) 15A and the fixed base station 30A of the communication operator A, but the user terminal (mobile station) 15B, the fixed base station 30B, and the mobile communication network 80B of the communication operator B, for example. The control information A is received from the remote control device 81A of the communication operator A. Based on the control information A, the power adjustment unit 1210A of the downlink signal processing path and the power adjustment unit 1110A of the uplink signal processing path are controlled, and the communication operator A output from each of the power adjustment unit 1210A and the power adjustment unit 1110A. the second output of the frequency F2A downlink 'uplink transmission signal _{S T1A'} of the transmission signal _{S T2A} output and first frequency F1A, oN / OFF as shown in the aforementioned FIG. 12 (a) ~ (h) of can do.

  As described above, in the wireless relay system configured as described above, the base unit 10 uses the first antenna 101 for mobile base stations (fixed base stations 30A and 30B) to provide mobile base stations for a plurality of communication operators A and B. (Fixed base station) Receives radio signals of the first frequencies F1A and F1B transmitted by 30A and 30B, respectively, converts them to the second frequencies F2A and F2B by the frequency converter (frequency converter) 13, and for the radio relay station The second antenna 102 transmits to the slave unit 20. The subunit | mobile_unit 20 receives the electromagnetic wave transmitted by the 2nd frequency F2A, F2B from the main | base station 10 with the 1st antenna 201 for parent | base_units, and uses the frequency conversion part (frequency converter) 23 to change to 1st frequency F1A, F1B. The frequency is converted and transmitted by the second antenna 202 for the mobile station (user terminal).

  Moreover, the subunit | mobile_unit 20 receives the radio signal of 1st frequency F1A 'and F1B' which each mobile station 40A, 40B corresponding to several communication operators A and B transmits with the 2nd antenna 202 for mobile stations. Then, the frequency is converted into the second frequencies F2A ′ and F2B ′ by the frequency converter (frequency converter) 23, and transmitted to the base unit 10 by the first antenna 201 for the radio relay station. The base unit 10 receives radio waves transmitted from the slave unit 20 at the second frequencies F2A ′ and F2B ′ by the second antenna 102 for the radio relay station, and the first frequency F1A by the frequency conversion unit (frequency converter) 13. The frequency is converted to ', F1B' and transmitted by the first antenna 101 for mobile base stations (fixed base stations 30A and 30B).

  By performing the frequency conversion, sneak interference of the same frequency between the antennas 201 and 202 of the slave unit 20 is eliminated, so that the transmission power of the slave unit 20 can be transmitted with the maximum transmission power.

  Further, the first frequencies F1A / F1A ′ and F1B / F1B ′ used in the wireless relay system generally use the same frequencies as those used by the mobile base stations (fixed base stations 30A and 30B).

  Further, since the base unit 10 is “wirelessly connected” to the mobile base stations (fixed base stations 30A, 30B) of the communication operators A and B, the base unit 10 is connected to the mobile base stations (fixed base stations of the communication operators A and B). As long as it is within the area of the base stations 30A, 30B), it can be fixedly installed at an arbitrary place, and can also travel in a specific direction. For example, it can drive toward the direction of the subunit | mobile_unit 20, and can extend the area | region of the subunit | mobile_unit 20 to the out-of-service area of a mobile base station (fixed base station 30A, 30B).

  As described above, according to the present embodiment, after the first wireless relay station 10 is mounted on the automobile and moved to the target position, the connection work to the core network and the setup work of the base station as in the case of mounting the base station are performed. Since it is not necessary to perform this, relay of wireless communication between the fixed base stations 30A and 30B of the plurality of communication operators A and B and the mobile stations (user devices) 40A and 40B can be started promptly.

  Further, according to the present embodiment, the base station device (eNodeB) is not required for the base unit 10 and the configuration is simple.

  In addition, according to the present embodiment, the radio frequencies (F1A / F1A ′, F1B / F1B ′) of the mobile base stations (fixed base stations 30A, 30B) of the respective communication operators A, B are also used in the radio relay system. It is not necessary to prepare a high frequency and the configuration of the wireless relay system is simple.

  In particular, according to the configuration examples of FIG. 5, FIG. 7, FIG. 17 and FIG. 19, as the first antenna 101 for the mobile base station (fixed base stations 30A, 30B) of the first radio relay station (master unit) 10 Using an omnidirectional antenna, it is possible to transmit / receive to / from radio base stations (fixed base stations 30A and 30B) of a plurality of different communication operators A and B and perform radio relay. In addition, since there is one first antenna 101 for mobile base stations, the configuration is simple.

  In particular, according to the configuration examples of FIGS. 9 and 21, a plurality of directional antennas 101 </ b> A are used as the first antenna for the mobile radio base station (fixed base stations 30 </ b> A, 30 </ b> B) of the first radio relay station (base unit) 10. , 101B, the communication quality of each communication operator A, B can be improved by transmitting / receiving to / from the mobile base stations (fixed base stations 30A, 30B) for each communication operator A, B.

  Further, in particular, according to the configuration examples of FIGS. 17 to 24, an AGC (Auto Gain Control) is provided for each of the downlink radio relay frequencies (first frequencies) F1A and F1B received by the first radio relay station (master unit) 10. ) Is applied so that the output of the radio signals for the slave units of the intermediate frequencies (second frequencies) F2A and F2B corresponding to the respective communication operators A and B becomes the same power. Further, AGC is applied to each intermediate frequency (second frequency) F2A, F2B received by the second radio relay station (slave unit) 20, and the radio relay frequency (first frequency) F1A of each communication operator A, B is applied. , F1B is controlled so as to have the same power for the mobile station. By controlling the power adjustment of the first radio relay station (master unit) 10 and the second radio relay station (slave unit) 20, radio relay for the mobile station of the second radio relay station (slave unit) 20 in the downlink is performed. Since the transmission powers of the frequencies (first frequency) F1A and F1B are the same, the radio relay area (cell 200 of the slave unit 20) is set between the radio relay frequencies (first frequency) F1A and F1B corresponding to the respective communication operators A and B. ) Will be the same.

  Similarly, AGC is applied to each uplink radio relay frequency (first frequency) F1A ′, F1B ′ received by the second radio relay station (slave unit) 20 to correspond to each communication operator A, B. Control is performed so that the output of the radio signal for the parent device of the intermediate frequency (second frequency) F2A ′, F2B ′ becomes the same power. Further, the AGC is applied to each intermediate frequency (second frequency) F2A ′, F2B ′ received by the first radio relay station (master unit) 10, and the radio relay frequency (first frequency) of each communication operator A, B is applied. ) Control is performed so that the outputs of F1A ′ and F1B ′ for the mobile base stations (fixed base stations 30A and 30B) have the same power. By controlling the power adjustment of the first radio relay station (master unit) 10 and the second radio relay station (slave unit) 20, the first radio relay station (master unit) 10 in the uplink to the mobile base station (fixed base) Since the transmission power of the radio relay frequencies (first frequencies) F1A ′ and F1B ′ for the stations 30A and 30B) is the same, the radio relay frequencies (first frequencies) F1A ′ and F1B corresponding to the respective communication operators A and B The wireless relay areas (areas where communication operators A and B can communicate with the mobile base stations) are the same.

  Further, according to the present embodiment, there is a difference between the mobile base station areas (cells 300A and 300B of the fixed base stations 30A and 30B) and the wireless relay areas (cell 200 of the slave unit 20) of the communication operators A and B. Even if there is a partial overlap, since the mobile base station (fixed base stations 30A and 30B) and the wireless relay system transmit the same signal, it interferes with the mobile stations (user terminals) 40A and 40B located in the overlapping area. It will not be. Rather, since the radio signals transmitted from both the mobile base stations (fixed base stations 30A and 30B) and the radio relay system are added and received, the communication quality is improved (see FIG. 25).

  Further, according to the present embodiment, the base unit 10 mounted on the automobile 50 or the like extends to the end of the service area (cells 300A and 300B) of the mobile base stations (fixed base stations 30A and 30B) of the communication operators A and B. Can move. For example, if the base unit 10 is moved to the end of the mobile base station area (the cell end of the fixed base stations 30A and 30B), it can be relayed from there to the sub unit 20, so the service area of the wireless relay system is extended further. (See FIGS. 26 (a) and (b)).

  Further, according to the present embodiment, the service area of the wireless relay system can be continuously expanded if the base unit 10 is mounted on the automobile 50 and travels. For example, when searching for the victims outside the service area (cells 300A, 300B) of the mobile base stations (fixed base stations 30A, 30B) of the respective communication operators A, B, the area can be expanded continuously, so the search The range can be easily expanded in a short time. In particular, the faster the traveling speed of the automobile 50 or the like, the longer the area can be expanded (see FIG. 27).

  Further, according to the present embodiment, the base unit 10 controls the remote control communication ON / OFF or the power ON / OFF and the monitoring of the device by the above-described user terminal (mobile station) 15 (15A, 15B). Communication can be performed between the control unit 14 to be performed and at least one of the remote control devices 81A and 81B (control sources) provided in the communication operators A and B of the mobile communication networks 80A and 80B. In addition, the handset 20 is controlled by the above-described user terminal (mobile station) 25 (25A, 25B) for remote control communication ON / OFF, power ON / OFF control, and wireless communication unit amplifier (AMP) gain control (AMP). Communication can be performed between the control unit 24 that performs (maximum transmission power control) and at least one of the remote control devices 81A and 81B (control sources) of the communication operators A and B of the mobile communication networks 80A and 80B.

  The communication operators A and B can independently remotely control the start and end of the communication of the wireless relay system by remotely performing the ON / OFF of the communication of the base unit 10 or the ON / OFF control of the power supply. For example, when the master unit 10 and the slave unit 20 are installed at predetermined places, the communication of the master unit 10 is remotely turned on / off or powered from the remote control devices 81A and 81B (control sources) provided in the communication operators A and B. ON / OFF control is performed. Thereby, the start and stop of communication of the wireless relay system can be remotely controlled for each of the communication operators A and B.

  Similarly, the start and stop of communication of the wireless relay system can be controlled by the slave unit 20 by remotely controlling the power on / off of the slave unit 20 after the communication of the master unit 10 is turned on. Further, gain control (maximum transmission power control) of the amplifier (AMP) of the slave unit 20 can be performed remotely.

  In addition, according to the present embodiment, the installation work of the wireless relay system (master device 10 and slave device 20) can be performed by a local worker (a worker who cannot operate the apparatus), and the operation of the wireless relay system is performed. Can be performed remotely by a communications operator. As a result, it is not necessary for the operator of the communication operator to go to the site to perform installation work, so that it is possible to expect operational efficiency and a significant reduction in time to start operation.

  Further, according to the present embodiment, the operation of the wireless relay can be controlled (permitted) by the communication operator, so that the wireless relay cannot be executed without permission. Therefore, it is possible to place wireless medium-term stations in various places in advance for disasters or searches.

  Further, according to the present embodiment, when the wireless relay system interferes with the service area (cell 300C) of another mobile base station (fixed base station 30C), the gain (AMP) of the handset 20 (AMP) Pre-interference with the service area (cell 300C) of another mobile base station (fixed base station 30C) can be suppressed by performing reduction control on the maximum transmission power (see FIG. 28).

  Note that the processing steps described in this specification and the components of the base station apparatus in the radio relay station, the remote control apparatus, and the base station can be implemented by various means. For example, these steps and components may be implemented in hardware, firmware, software, or a combination thereof.

  As for hardware implementation, the above-described steps are performed in an entity (eg, wireless relay station, base station device, wireless relay device, user device (mobile station, communication terminal), remote control device, hard disk drive device, or optical disk drive device). Means such as processing units used to implement the components include one or more application specific ICs (ASICs), digital signal processors (DSPs), digital signal processors (DSPDs), programmable logic devices (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, electronic device, other electronic unit, computer designed to perform the functions described herein Or a set of them It may be implemented in the suit.

  Also, for firmware and / or software implementation, means such as processing units used to implement the above components may be programs (eg, procedures, functions, modules, instructions) that perform the functions described herein. , Etc.). In general, any computer / processor readable medium that specifically embodies firmware and / or software code is means such as a processing unit used to implement the steps and components described herein. May be used to implement For example, the firmware and / or software code may be stored in a memory, for example, in a control device, and executed by a computer or processor. The memory may be implemented inside the computer or processor, or may be implemented outside the processor. The firmware and / or software code may be, for example, random access memory (RAM), read only memory (ROM), nonvolatile random access memory (NVRAM), programmable read only memory (PROM), electrically erasable PROM (EEPROM) ), FLASH memory, floppy disk, compact disk (CD), digital versatile disk (DVD), magnetic or optical data storage, etc. Good. The code may be executed by one or more computers or processors, and may cause the computers or processors to execute the functional aspects described herein.

  Also, descriptions of embodiments disclosed herein are provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. The present disclosure is therefore not limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

10: First radio relay station (master unit)
101, 101A, 101B: first antenna 102: second antenna 11: first wireless communication unit 111: reception amplifier 112: reception signal distribution unit 113A, 113B: ON / OFF switching unit 114A, 114B: band filter 115: Received signal combiner 116, 116A, 116B: Band filter 117, 117A, 117B: Common amplifier 118: Downlink wireless relay switching unit 119: Received signal distributor 1110A, 1110B: Power adjustment unit 1111A, 1111B: Band filter (BPF)
1112A, 1112B: Amplifier with automatic gain control (AGC) function 12: Second wireless communication unit 121: Amplifier for reception 122: Received signal distribution unit 123A, 123B: ON / OFF switching unit 124A, 124B: Band filter 125: Received signal synthesis unit 126: Band filter 127: Common amplifier 128: Uplink wireless relay switching unit 1210A, 1210B Power adjustment unit 1211A, 1211B Band filter (BPF)
1212A, 1212B Amplifier with automatic gain control (AGC) function 13: Frequency conversion unit 131, 132: Frequency converter 14: Control unit 141A, 141B: Remote control unit 20: Second radio relay station (slave unit)
200A, 200B: wireless relay area 201: first antenna 202: second antenna 21: first wireless communication unit 211: reception amplifier 212: reception signal distribution unit 213A, 213B: ON / OFF switching unit 214A, 214B: band Filter 215: Received signal adding unit 216: Band filter 217: Common amplifier 218: Downlink wireless relay switching unit 2110A, 2110B: Power adjustment unit 2111A, 2111B: Band filter (BPF)
2112A, 2112B: Amplifier with automatic gain control (AGC) function 22: Second wireless communication unit 221: Reception amplifier 222: Reception signal distribution unit 223A, 223B: ON / OFF switching unit 224A, 224B: Band filter 225: Received signal combining unit 226: Band filter 227: Common amplifier 228: Uplink wireless relay switching unit 2210A, 2210B: Power adjustment unit 2211A, 2211B: Band filter (BPF)
2212A, 2212B: Amplifier with automatic gain control (AGC) function 23: Frequency conversion unit 231, 232: Frequency converter 24: Control unit 30A, 30B: Fixed base station (mobile base station)
30C: Fixed base station (mobile base station)
31A, 31B: Antenna 40A, 40B: Mobile station (user equipment)
50: Car 60: Balloon (Mooring Balloon)
70: Small aircraft (drone)
80A, 80B: Mobile communication network 81A, 81B: Remote control device

Claims (13)

A radio relay system that relays radio communication between a fixed base station and user equipment of a plurality of communication operators having different radio signal frequencies,
A movable first radio relay station, and a second radio relay station positioned higher than the first radio relay station,
The first radio relay station includes a first radio communication unit that transmits and receives radio signals of a plurality of first frequencies different from each other corresponding to the plurality of fixed base stations with the fixed base stations of the plurality of communication operators. A second radio communication unit that transmits and receives radio signals of a plurality of second frequencies different from each other corresponding to the plurality of communication operators with the second radio relay station, and the first frequency and the second frequency A frequency conversion unit that performs frequency conversion, and a signal power adjustment unit that adjusts the signal power after frequency conversion to be equal to each other among the plurality of communication operators,
The second radio relay station transmits and receives the plurality of second frequency radio signals to and from the first radio relay station, and a plurality of first frequency between user devices and the first radio communication unit. A second radio communication unit that transmits and receives radio signals, a frequency conversion unit that performs frequency conversion between the first frequency and the second frequency, and signal power after frequency conversion are made equal among the plurality of communication operators. And a signal power adjustment unit that adjusts to a wireless relay system. The wireless relay system according to claim 1,
The signal power adjustment unit of each of the first radio relay station and the second radio relay station includes, for each of the plurality of communication operators, a band filter that selectively passes a signal of the frequency of the communication operator, and the band filter And an amplifier with automatic gain adjustment that adjusts the signal power after passing through to a predetermined power. In the wireless relay system according to claim 1 or 2,
The first radio relay station has a plurality of directional antennas whose directions can be adjusted or controlled so as to track the fixed base stations of the plurality of communication operators, or the fixed base stations of the plurality of communication operators, respectively. A wireless relay system comprising an adaptive antenna composed of a plurality of elements capable of forming a beam so as to track a signal. A radio relay system that relays radio communication between a fixed base station and user equipment of a plurality of communication operators having different radio signal frequencies,
A movable first radio relay station, and a second radio relay station positioned higher than the first radio relay station,
The first radio relay station includes a first radio communication unit that transmits and receives radio signals of a plurality of first frequencies different from each other corresponding to the plurality of fixed base stations with the fixed base stations of the plurality of communication operators. A second radio communication unit that transmits and receives radio signals of a plurality of second frequencies different from each other corresponding to the plurality of communication operators with the second radio relay station, and the first frequency and the second frequency A frequency conversion unit that performs frequency conversion;
The second radio relay station transmits and receives the plurality of second frequency radio signals to and from the first radio relay station, and a plurality of first frequency between user devices and the first radio communication unit. A second wireless communication unit that transmits and receives a radio signal; and a frequency conversion unit that performs frequency conversion between the first frequency and the second frequency;
The first radio relay station has a plurality of directional antennas whose directions can be adjusted or controlled so as to track the fixed base stations of the plurality of communication operators, or the fixed base stations of the plurality of communication operators, respectively. A wireless relay system comprising an adaptive antenna composed of a plurality of elements capable of forming a beam so as to track a signal. In the radio relay system according to any one of claims 1 to 4,
For each of the plurality of communication operators, the first frequency and the second frequency are different so as not to cause a radio signal wraparound interference in the first radio relay station and a radio signal wraparound interference in the second radio relay station. A wireless relay system having a frequency. In the radio relay system according to any one of claims 1 to 5,
The radio relay system according to claim 1, wherein the first radio relay station is mounted on a mobile body that can move on the ground. In the radio relay system according to any one of claims 1 to 6,
The wireless relay system, wherein the second wireless relay station is mounted on a balloon. The wireless relay system according to claim 7,
The radio relay system according to claim 1, wherein the first radio relay station is mounted on a mobile body, and a balloon on which the second radio relay station is mounted is moored to another mobile body different from the mobile body. In the radio relay system according to any one of claims 1 to 6,
The second radio relay station is mounted on an aircraft that stays or moves in a predetermined airspace by autonomous control or by external control. The wireless relay system according to claim 9, wherein
The first radio relay station is mounted on a moving body, and the mobile body includes a separation / departure unit on which the flying object can be separated. The wireless relay system according to any one of claims 1 to 10,
The first radio relay station includes a directional antenna whose direction can be controlled so as to track the second radio relay station, or a plurality of elements that can form a beam so as to track the second radio relay station. A wireless relay system comprising an adaptive antenna. The wireless relay system according to any one of claims 1 to 11,
The first radio relay station turns on the relay of the radio signal between the fixed base station and the radio signal between the second radio relay station by the control information from the outside for each of the plurality of communication operators. A wireless relay system comprising a control unit that performs ON / OFF control. The wireless relay system according to any one of claims 1 to 12,
The second radio relay station transmits, to each of the plurality of communication operators, information indicating at least one status of radio signal transmission and reception with a user apparatus having the first frequency as an external predetermined transmission destination. A wireless relay system comprising: means for transmitting to

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