JP2019125877A - Radio relay system - Google Patents

Abstract

To provide a radio relay system capable of starting relay of radiocommunication promptly between a fixed base station and user equipment in the mobile communication network of multiple communication operators, after moving to a target position, by simple configuration.SOLUTION: A mobile first radio repeater station transmits and receives multiple radio signals of first frequency between multiple fixed base stations, transmits and receives multiple radio signals of second frequency between a second radio repeater station, executes frequency conversion of first and second frequencies for each communication operator and adjusts signal power after frequency conversion so as to be equal to each other between multiple communication operators. The second radio repeater station transmits and receives multiple radio signals of second frequency between the first radio repeater station, transmits and receives multiple radio signals of first frequency between user equipment, executes frequency conversion of first and second frequencies for each communication operator and adjusts signal power after frequency conversion so as to be equal to each other between multiple communication operators.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wireless relay system.

    Conventionally, for a relay antenna and a mobile station in a weak electric field area such as a blind area, a mountain area, or a marine area where there is an obstacle that obstructs the line-of-sight propagation of radio waves between the antenna and a fixed base station on the ground A wireless relay system is known which performs wireless relay by a moored balloon equipped with a wireless relay station having an antenna (see, for example, Patent Document 1).

JP, 2016-002973, A

  In the above-described conventional wireless relay system, it is difficult to wirelessly communicate between the fixed base station and the wireless relay station mounted on the moored balloon in the out-of-range area of the fixed base station, so the fixed base station and the user apparatus (mobile station) Wireless communication may not be able to be relayed. Therefore, a vehicle capable of moving on the ground is equipped with the function of a base station (eNodeB) and moved to a destination, and the base station and frequency converter included in the vehicle moved to the destination A wireless relay system can be considered that relays wireless communication between the base station and a user apparatus (mobile station) by wirelessly communicating between the aircraft) and the wireless relay station (child unit) of the moored balloon.

  However, this radio relay system has the following problems. The configuration is complicated because the master unit is configured by the base station apparatus (eNodeB) and the frequency converter. In addition, it is necessary to connect the base station apparatus (eNodeB) of the master unit to the core network of the mobile communication network in a wired or wireless manner, and the operation is complicated. Furthermore, since the operation of the wireless relay needs to be carried out by a person in charge of the communication operator, when the site is very far, the operator of the communication operator arrives at the site, and then the master unit mounted on the vehicle It takes time for the specialized communication operator to connect the base station and the core network of the mobile communication network by wire and set up the system parameters of the base station, and it takes a lot of time to start the operation of the radio relay. It takes time. In addition, when there is overlap between the cell of the fixed base station and the cell of the wireless relay station (master unit, slave unit), interference occurs with the same frequency, so the cell of the fixed base station and the wireless relay station ( It is necessary to prepare different frequencies from the cell of the master unit and the slave unit to avoid interference. In particular, when performing wireless relay simultaneously to mobile communication networks of a plurality of communication operators, since it is necessary to carry out the above connection and setup for each communication operator, the time until the start of operation at the site becomes longer.

  Such a problem is not limited to the case where the user's wireless relay station performing wireless communication with the user apparatus (mobile station) is not only the wireless relay station of the moored balloon, but also predetermined by autonomous control or remote control from the outside. The same may occur in the case of a wireless relay station mounted on an airborne vehicle (air vehicle such as a drone) that can stay or move in the airspace of the

A wireless relay system according to an aspect of the present invention is a wireless relay system that relays wireless communication between fixed base stations of a plurality of communication operators having different wireless signal frequencies and user equipment, and is movable And a second wireless relay station positioned higher than the first wireless relay station. A first wireless communication unit configured to transmit and receive wireless signals of a plurality of different first frequencies respectively corresponding to the plurality of fixed base stations with the fixed base stations of the plurality of communication operators; A second wireless communication unit for transmitting and receiving wireless signals of a plurality of different second frequencies corresponding to the plurality of communication operators with the second wireless relay station; and of the first frequency and the second frequency It has 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 among the plurality of communication operators. The second wireless relay station transmits a plurality of wireless signals of the second frequency to and from the first wireless relay station, and the plurality of first frequencies to and from the user apparatus. A second wireless communication unit that transmits and receives a wireless signal, a frequency conversion unit that performs frequency conversion of the first frequency and the second frequency, and signal power after frequency conversion is equal to each other among the plurality of communication operators And a signal power adjustment unit to adjust the
In the wireless relay system, the signal power adjusting unit of each of the first wireless relay station and the second wireless relay station selectively passes a signal of a frequency of the communication operator for each of the plurality of communication operators. A filter and an amplifier with automatic gain adjustment may be provided to adjust the signal power after passing through the band-pass filter to a predetermined power.
In the wireless relay system, the first wireless relay station can adjust a plurality of directional antennas whose directions can be adjusted or can be controlled so as to track fixed base stations of the plurality of communication operators, or the plurality of the plurality of directional antennas The adaptive antenna may be provided with a plurality of elements capable of forming beams so as to track each fixed base station of the communication operator.

A radio relay system according to another aspect of the present invention is a radio relay system relaying radio communication between fixed base stations of a plurality of communication operators having different radio signal frequencies and user equipment,
A movable first wireless relay station, and a second wireless relay station located higher than the first wireless relay station. A first wireless communication unit configured to transmit and receive wireless signals of a plurality of different first frequencies respectively corresponding to the plurality of fixed base stations with the fixed base stations of the plurality of communication operators; A second wireless communication unit for transmitting and receiving wireless signals of a plurality of different second frequencies corresponding to the plurality of communication operators with the second wireless relay station; and of the first frequency and the second frequency And a frequency converter for frequency conversion. The second wireless relay station transmits a plurality of wireless signals of the second frequency to and from the first wireless relay station, and the plurality of first frequencies to and from the user apparatus. A second wireless communication unit that transmits and receives a wireless signal, and a frequency conversion unit that performs frequency conversion between the first frequency and the second frequency. The first wireless relay station is capable of adjusting or controlling its direction so as to track fixed base stations of the plurality of communication operators, or fixed base stations of the plurality of communication operators. And an adaptive antenna comprising a plurality of elements capable of forming a beam so as to track the

In the radio relay system, for each of the plurality of communication operators, the first frequency and the second frequency indicate interference of radio signals at the first radio relay station and interference of radio signals at the second radio relay station. The frequency may be different so as not to occur.
Further, in the radio relay system, the first radio relay station may be mounted on a mobile body movable 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 wireless relay station may be mounted on a mobile unit, and a balloon on which the second wireless relay station is mounted may be anchored to another mobile unit different from the mobile unit.
Further, in the radio relay system, the second radio relay station may be mounted on an aircraft that stays or moves in a predetermined airspace by autonomous control or control from the outside.
Further, in the wireless relay system, the first wireless relay station may be mounted on a mobile unit, and the mobile unit may be provided with a departure / arrival unit capable of making an arrival / exit of the aircraft.
In the wireless relay system, the first wireless relay station may be a directional antenna whose direction can be controlled to track the second wireless relay station, or a beam to track the second wireless relay station. An adaptive antenna comprising a plurality of elements capable of forming
Further, in the wireless relay system, the first wireless relay station is configured to communicate between a wireless signal with the fixed base station and the second wireless relay station according to external control information for each of the plurality of communication operators. The control part which carries out ON / OFF control of relay with the radio signal of (1) may be provided.
Further, in the wireless relay system, the second wireless relay station is information indicating at least one status of transmission and reception of a wireless signal with the user apparatus having the first frequency for each of the plurality of communication operators. May be transmitted to an external predetermined destination.

  According to the present invention, with a simple configuration, after moving to a target position, relaying of wireless communication between a fixed base station and a user apparatus can be promptly started for mobile communication networks of a plurality of communication operators.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram which shows an example of the whole structure of the communication system containing the radio relay system which concerns on one Embodiment of this 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 wireless relay station (master device) of the wireless relay system which concerns on embodiment. The block diagram which shows an example of the principal part structure of the 2nd radio relay station (child machine) of the radio relay system concerning an embodiment. The block diagram which shows one structural example of the 1st radio relay station (master device) corresponding to the downlink and uplink two-way radio relay of the radio relay system concerning an embodiment. (A)-(d) is a figure which shows the characteristic BPF of the frequency characteristic of a signal of a downlink and an uplink in the radio relay system of FIG. 5, and a band pass filter. The block diagram which shows one structural example of the 2nd radio relay station (child machine) corresponding to the downlink and the uplink two-way radio relay of the radio relay system concerning an embodiment. (A)-(d) is a figure which shows the characteristic BPF of the frequency characteristic of a signal of a downlink and an uplink in the radio relay system of FIG. 7, and a band pass filter. The block diagram which shows the other structural example of the 1st radio relay station (master device) 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 other structural example of the 1st radio relay station (master device) 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 the downlink signal processing path of the first wireless relay station (master device) of FIG. 5; (A)-(d) is explanatory drawing of the output pattern of the downlink received signal before frequency conversion in remote control of the 1st wireless relay station (master device) of FIG. 11, respectively. (E)-(h) is explanatory drawing of the output pattern of the received signal of the uplink before frequency conversion in remote control of the 1st wireless relay station (master device) of FIG. 11, respectively. FIG. 6 is a block diagram showing another example of the remote control system in the downlink signal processing path of the first wireless relay station (master device) of FIG. 5; 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 wireless relay station (master unit) and the uplink signal processing path of the second wireless relay station (child unit) of 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) show frequency characteristics and frequencies of received signals in the downlink signal processing path of the second wireless relay station (child unit) and the uplink signal processing path of the first wireless relay station (master unit) in FIG. The figure which shows the frequency characteristic of the transmitting signal after conversion, and the characteristic of a band pass filter. The block diagram which shows the other structural example of the 1st radio relay station (master device) 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 reception signal received by the antenna in the downlink signal processing path and the uplink signal processing path of the first wireless 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 (child machine) corresponding to the downlink and uplink bidirectional | two-way radio relay of the wireless relay system which concerns on embodiment. (A) to (f) show 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 wireless relay station (child 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 1st radio relay station (master device) 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 other structural example of the 1st radio relay station (master device) 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 the downlink signal processing path and the uplink signal processing path of the first wireless relay station (master device) of FIG. 17; FIG. 18 is a block diagram showing another example of the remote control system in the downlink signal processing path and the uplink signal processing path of the first wireless relay station (master device) of FIG. 17; Explanatory drawing explaining the advantage of the radio relay system which concerns on embodiment. (A) And (b) is explanatory drawing explaining the other advantage of the radio relay system concerning 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 radio relay system concerning embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an example of the entire configuration of a communication system including a wireless relay system according to an embodiment of the present invention. In FIG. 1, the wireless relay system according to the present embodiment includes a first wireless relay station (hereinafter also referred to as “master unit”) 10 and a second wireless relay station (hereinafter also referred to as “child unit”) 20. . The first wireless relay station (master unit) 10 and the second wireless relay station (child 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 stations and the plurality of mobile stations 40A and 40B as user apparatuses corresponding to the plurality of communication operators A and B, respectively, is simultaneously relayed. Although the case where the number of communication operators (fixed base stations) is two is described in the present embodiment, the number of communication operators (fixed base stations) may be three or more. Further, although the number of mobile stations corresponding to each of the communication operators A and B is one in FIG. 1, 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, for example, hold information of the first wireless relay station 10 and the second wireless relay station 20, and transmit control information to at least one of the first wireless relay station 10 and the second wireless relay station 20. be able to. Also, the remote control devices 81A and 81B may function as a transmission destination of information, and may receive information from at least one of the first wireless relay station 10 and the second wireless relay station 20. The remote control devices 81A and 81B may be provided in places other than the mobile communication networks 80A and 80B as long as they can communicate with the first wireless relay station 10 and the second wireless relay station 20. Further, control of the first wireless relay station 10 and the second wireless relay station 20 may be performed by both of the remote control devices 81A and 81B, or even if any one of the remote control devices 81A and 81B is performed. 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 for each of the communication operators A and B (hereinafter, also referred to as "radio relay frequency" or "base station side frequency"). ) F1A (downlink signal) and F1A ′ (uplink signal) (hereinafter collectively referred to as “F1A / F1A ′”) and F1B (downlink signal) and F1B ′ (uplink signal) (hereinafter collectively “F1B / The second frequency (hereinafter also referred to as “intermediate frequency”) F2A (downlink signal) and F2A ′ (uplink signal) (hereinafter referred to as “F1B ′”) and the second radio relay station 20 Relay together with the radio signal of "F2A / F2A '" and F2B (downlink signal) and F2B' (uplink signal) (hereinafter collectively referred to as "F2B / F2B '") 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 automobile 50 on which the first wireless relay station 10 is mounted includes a battery, a generator, etc. capable of supplying power to the first wireless relay station 10 over a long period of time, such as an electric car, a hybrid car, a fuel cell car It may be In the configuration example of FIG. 1, the first wireless relay station 10 is an example in which the first wireless relay station 10 is incorporated into a car 50. However, the mobile body in which the first wireless relay station 10 is incorporated is a vehicle other than a car traveling on a road. , A railway vehicle traveling on a track, an aircraft, or a ship on a river or the sea. In addition, the mobile unit in which the first radio relay station 10 is incorporated is an aircraft that stays or moves in a predetermined airspace by autonomous control or external control, such as a small remote-controllable helicopter (for example, a drone). It is also good.

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

  The balloon 60 is a blind area, mountain area, sea area in which obstacles such as mountains and high-rise buildings exist between the fixed base stations 30A and 30B and the antennas 31A and 31B of the wireless base station. Or the like may be installed in the sky above the weak electric field area. The balloon 60 is anchored and supported by a mooring cord (main mooring cord) extending above the anchor base on the ground so as to be disposed, for example, at a position of several tens m to several hundreds m from the ground. An anchor base should just fix the lower end of a mooring cord (main mooring cord), and can anchor the balloon 60, and a shape, a size, etc. are not limited to a specific thing. The balloon 60 may be moored to a car 50 on which the first radio relay station 10 is mounted as an anchor base. Further, when the balloon 60 is placed above the sea, the anchor base may be provided on a buoy or a ship on the sea.

  Further, as shown in FIG. 2, the second wireless relay station 20 may be mounted on a flying object 70 such as a drone that stays or moves in a predetermined airspace by autonomous control or control from the outside. In this case, the automobile 50 on which the first radio relay station 10 is mounted may be provided with a takeoff and arrival unit capable of taking off and take off the flight object 70.

  A first frequency (relay target frequency) F1A / F1A ', F1B / F1B' and a second frequency (intermediate frequency) F2A to be converted for each communication operator A, 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 interference between radio signals transmitted and received by the first radio relay station 10 and interference between radio signals transmitted and received by the second radio relay station 20 do not occur. It is a 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 ′ in the 3.3 GHz band The frequency of

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

  The first radio communication unit 11 transmits a first frequency (relay target frequency) F1A / F1A ′, F1B, which is a base station side frequency, to the fixed base stations 30A and 30B via the first antenna 101 for the fixed base station. Transmit / receive radio signal of / F1B '. The second wireless communication unit 12 exchanges a second frequency (intermediate frequency) F2A / F2A ′ and F2B / F2B ′ with the second wireless relay station (child unit) 20 via the second antenna 102 for the wireless relay station. Send and receive wireless signals. The first wireless communication unit 11 and the second wireless communication unit 12 may each 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

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

  The radio signal relayed by the first radio relay station 10 may be transmitted and received using, for example, the OFMDA communication scheme conforming to the LTE or LTE-Advanced standard. In this case, good communication quality can be maintained even if multipaths with different delays of radio signals occur.

  The first antenna 101 of the first wireless relay station 10 may be a non-directional antenna, or a plurality of directivity capable of adjusting the direction of directivity in the direction of each of the fixed base stations 30A and 30B of the plurality of communication operators A and B. It may be a sex antenna. In addition, the first antenna 101 of the first wireless relay station 10 may be a directional antenna whose direction can be controlled to track each of the fixed base stations 30A and 30B of the communication operators A and B, or the 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 wireless relay station 10 may be a non-directional antenna or a directional antenna whose direction can be controlled to track the second wireless relay station 20, or the second wireless relay 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 the station 20.

  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, B (control sources) of the communication operators A, B of the plurality of mobile communication networks 80A, B or transmitting information to the remote control devices 81A, 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, the control information transmitted from the remote control devices 81A and 81B via the fixed base stations 30A and 30B at the user terminal (mobile station) 15, and based on the control information, the communication operator Control may be performed to turn on / off the wireless relay function of A or the wireless relay functions of both of the communication operators A and B. Here, communication between the remote control devices 81A and 81B and the user terminal (mobile station) 15 may be performed, for example, by using IP addresses (or telephones) assigned to the remote control devices 81A and 81B and the user terminal (mobile station) 15, respectively. (Number or MAC address) may be used.

  In addition, the control unit 14 performs at least transmission and reception of radio signals with 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 location information of the wireless relay station, and at least one situation of transmission and reception of a wireless signal with the second wireless relay station 20 consisting of 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 each of the remote control devices 81 A and B of the communication operators A and B of mobile communication. The mobile communication operator side turns on / off the signal to the second wireless relay station 20 by, for example, turning on / off the wireless relay function of the first wireless relay station 10 based on the received wireless relay information. If it is predicted that interference will be exerted on the service area of another fixed base station, it can be controlled so as not to exert interference by turning it off. For example, it is possible to control so as not to transmit radio waves by turning off when there is no need to transmit radio waves until the drone arrives at the relay location.

  FIG. 4 is a block diagram showing an example of a main configuration of the second radio relay station 20 of the radio relay system according to the embodiment. In FIG. 4, the second wireless relay station 20 includes a first wireless communication unit 21, a second wireless 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 the second frequencies (intermediate frequencies) F2A / F2A 'and F2B / F2B' with the first radio relay station 10 via the first antenna 201 for the radio relay station. Send and receive. The second radio communication unit 22 transmits a first frequency (relay target frequency) F1A / F1A ′, F1B / F1B, which is a mobile station-side frequency between the mobile station 40A and 40B via the second antenna 202 for the mobile station. Transmit and receive radio signals. The first wireless communication unit 21 and the second wireless 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

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

  The radio signal relayed by the second radio relay station 20 may be transmitted and received using, for example, the OFMDA communication scheme conforming to the LTE or LTE-Advanced standard. In this case, the radio signal arriving from the fixed base station and the radio signal arriving from the second radio relay station 20 become equivalent to multipaths with 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 wireless relay station 20 may be a directional antenna whose direction can be controlled to track the first wireless relay station 10, or may be tracked to the first wireless 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 program incorporated in advance.

  In addition, 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 A user terminal (mobile station) 25 may be provided as a control communication terminal connected to the control unit 14 connected thereto. The user terminal (mobile station) 25 may be, for example, a mobile communication module that can be easily incorporated into a device. The control unit 24 receives, for example, the control information transmitted from the remote control devices 81A, B via the fixed base stations 30A, 30B and the wireless relay system at the user terminal (mobile station) 25, and based on the control information Control may be performed to turn on / off only the wireless relay function of the communication operator A or the wireless relay functions of both the communication operators A and B. Here, the communication between the remote control devices 81A, B and the user terminal (mobile station) 25 may be, for example, an IP address (or a telephone address assigned to each of the remote control devices 81A, B and the user terminal (mobile station) 25 (Number or MAC address) may be used.

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

  FIG. 5 is a block diagram showing an example of configuration of the first wireless relay station (master device) 10 corresponding to the downlink and uplink two-way wireless relay of the wireless relay system according to the embodiment. This configuration example is an example in which non-directional antennas are used for each of the first antenna 101 on the fixed base station side and the second antenna 102 on the child device side. In FIG. 5, the same parts as in FIG.

6 (a) to 6 (d) are diagrams showing frequency characteristics of downlink and uplink signals and characteristics BPF of a band filter in the radio relay system of FIG.
6A shows the received signals of the first frequencies F1A and F1B of the communication operators A and B, which are received by the first antenna 101 in the downlink signal processing path of the first wireless relay station (master device) 10 of FIG. S _R1A, a diagram illustrating frequency characteristics of _{S R1B.}
6 (b) shows frequency characteristics and bands of the transmission signals _ST2A , _ST2B of the second frequencies F2A, F2B after frequency conversion in the downlink signal processing path of the first wireless relay station (master unit) 10 of FIG. It is a figure which shows characteristic BPF of a filter.
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 wireless relay station (master device) 10 of FIG. 5. It is a figure which shows the frequency characteristic of received signal _{SR2A '} and _SR2B' .
Also shown in FIG. 6 (d) the first radio relay station of FIG. 5 (master unit) 10 first frequency F1A after frequency conversion in the uplink signal processing path of ', F1B' transmits signal _{S T1A} of _{', S T1B'} FIG. 16 is a diagram showing the frequency characteristic of and the characteristic BPF of a band pass filter.

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

  The ON / OFF switching units 113A and 113B may be configured by, for example, a switch or an attenuator (ATT).

Bandpass filter 114A is a communication operator A shown in FIG. 6 (a), the received signal _S R1A downlink _B, among the _{S R1B,} to selectively pass the received signal _{S R1A} of the first frequency F1A communication operator A 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 bandpass filter 116 is shown in FIG. 6 (d) to indicate communication operator A, the first frequency F1A after frequency conversion of B ', F1B' transmits signal _{S T1A} uplink both _{', S T1B'} passing It is a band pass filter.

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

Further, in FIG. 5, the frequency conversion unit 13 includes a frequency converter 131 for downlink and a frequency converter 132 for uplink. 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 master-slave relay, in the downlink signal processing path. On the other hand, the frequency converter 132 transmits the second frequencies F2A 'and _F2B' of the transmission signals _{S.sub.T2A '} and _S.sub.T2B' , which are intermediate frequencies for master-slave relay, in the uplink signal processing path for the fixed base station. It converts into 1st frequency F1A 'and F1B'.

Further, in FIG. 5, the second wireless communication unit 12 includes the DUP 120, a downlink reception signal processing unit on the side of the handset, and an uplink transmission signal processing unit on the side of the handset. The DUP 120 performs path separation between the uplink path of the received 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 slave side includes a band pass 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.
Also, the uplink transmission signal processing unit on the slave side includes an amplifier 121 for reception and an uplink radio relay switching unit 128. Uplink radio relay switching unit 128 includes received signal distribution unit 122, ON / OFF switching unit 123A and band filter 124A for communication operator A, ON / OFF switching unit 123B for communication operator B and band filter 124B, And a reception signal synthesis unit 125.

  The ON / OFF switching units 123A and 123B may be configured by, for example, a switch or an attenuator (ATT).

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 '} of the second frequency F2B' corresponding to the communication operator B.

Also, as shown in FIG. 6B, the band pass filter 126 passes band transmission signals S _T2A and S _T2B of the second frequencies F2A and F2B after frequency conversion of the communication operators A and B. It is a filter.

  When the level of the received signal received from the slave unit 20 via the second antenna 102 is sufficiently large, the receiving amplifier 121 may not be provided. In addition, when the on / off switching control of the uplink radio relay is not performed, the received signal distribution unit 122, the ON / OFF switching units 123A and 123B, the band pass filters 124A and 124B, and the uplink radio relay switching unit 128 are configured. The reception signal combining unit 125 may not be provided.

When relaying downlink radio communication from the fixed base stations 30A and 30B to the mobile stations 40A and 40B in the first radio relay station (master unit) 10 of the configuration example of FIG. base station 30A, the first frequency F1A received from 30B, F1B of the received signal _{S R1A, S R1B} is amplified by the amplifier 111 of the first wireless communication unit 11, after passing through the downlink radio relay switching unit 118, It is output to the frequency converter 131. In the frequency converter 131 first frequency F1A, second frequency F2A from F1B, the received signal is converted into F2B _{S R2A, S R2B} is unnecessary signals through a band filter 126 of the second wireless communication section 12 is removed And after being linearly amplified to a predetermined power (signal level) by the common amplifier 127, they are transmitted toward the slave 20 through the second antenna 102 as transmission signals _ST2A and _ST2B for downlink relaying. .

On the other hand, in the case of relaying uplink radio communication from the mobile stations 40A and 40B to the fixed base stations 30A and 30B in the first radio relay station (master unit) 10 of the configuration example of FIG. 5, via the second antenna 102. The received signals _{SR2A '} and _SR2B' of the second frequency 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. After that, it is output to the frequency converter 132. In the frequency converter 132 second frequency F2A ', F2B' first frequency F1A from ', F1B' received signal is converted into _{S R1A ', S R1B'} passes through the bandpass filter 116 of the first wireless communication section 11 After unnecessary signals are removed and linearly amplified to a predetermined power (signal level) by the common amplifier 117, the transmission signals _{ST1A ′} and _{ST1B ′} are transmitted via the first antenna 101 to the fixed base stations 30A and 30B. Sent towards.

  FIG. 7 is a block diagram showing an example of configuration of the second wireless relay station (child unit) 20 corresponding to downlink and uplink two-way wireless relay in the wireless relay system according to the embodiment. This configuration example is used in combination with the first radio relay station (master unit) 10 in FIG. 5, and nondirectional antennas are used for the first antenna 201 on the master unit side and the second antenna 202 on the mobile station side. It is an example. In FIG. 7, the same parts as in FIG. 5 will be assigned the same reference numerals and descriptions thereof will be omitted.

8 (a) to 8 (d) are diagrams showing frequency characteristics of downlink and uplink signals and characteristics BPF of a band filter in the radio relay system of FIG.
FIG. 8A shows the received signals of the second frequencies F2A and F2B of the communication operators A and B, which are received by the first antenna 201 in the downlink signal processing path of the second wireless relay station (child unit) 20 of FIG. S _R2A, is a diagram illustrating frequency characteristics of _{S R2B.}
8 (b) is a second radio relay station (slave device) 20 of the downlink signal first frequency F1A after frequency conversion in the processing path, the transmission signal _S T1A of _{F1B, S T1B} frequency characteristics and band-pass filter of FIG. 7 Is a diagram showing a characteristic BPF of
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 wireless relay station (child unit) 20 of FIG. received signal _{S R1A ', S R1B'} is a graph showing the frequency characteristics of.
FIG. 8D shows the frequencies of the transmission signals _{ST2A ′} and _{ST2B ′} of the second frequencies F2A ′ and F2B ′ after frequency conversion in the uplink signal processing path of the second radio relay station (child unit) 20 in FIG. 7. It is a figure which shows the characteristic BPF of a characteristic and a band pass filter.

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

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

Bandpass filter 214A is a communication operator A shown in FIG. 8 (a), the received signal _S R2A downlink _B, among the _{S R2B,} selectively received signal _{S R2A} of the second frequency F2A corresponding to the communication operator A The bandpass filter 214B is a bandpass filter that selectively passes the reception signal _SR2B of the second frequency F2B corresponding to the communication operator B.

Also, the band pass filter 216 passes the uplink transmission signals S _{T2 A ′} and S _T2 B ′ of the second frequencies F 2 A ′ and F 2 B ′ after frequency conversion of the communication operators A and B shown in FIG. It is a band pass filter.

  When the level of the reception signal received from the parent device 10 via the first antenna 201 is sufficiently large, the reception amplifier 211 may not be provided. In addition, when the on / off switching control of the downlink radio relay is not performed, the received signal distribution unit 212, the on / off switching units 213A and 213B, the band pass filters 214A and 214B, and the downlink radio relay switching unit 218 are configured. The reception signal addition unit 215 may not be provided.

Further, in FIG. 7, the frequency conversion unit 23 includes a frequency converter 231 for downlink and a frequency converter 232 for uplink. The frequency converter 231 converts the second frequencies F2A and F2B of the reception 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, the uplink signal the mobile station corresponding transmission signal _{S T1A} in processing path _{', S T1B'} first frequency F1A of ', F1B' the master unit - which is an intermediate frequency of the slave unit relay No. Convert to two frequencies F2A 'and F2B'.

Further, in FIG. 7, the second wireless 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 received signal received by the second antenna 202 and the downlink path of the transmission signal transmitted by the second antenna 202.
The downlink reception signal processing unit on the mobile station side includes a band pass 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.
Further, the uplink transmission signal processing unit on the mobile station side includes an amplifier 221 for reception and an uplink radio relay switching unit 228. The uplink radio relay switching unit 228 includes a received signal distribution unit 222, an ON / OFF switching unit 223A and a band filter 224A for the communication operator A, and an ON / OFF switching unit 223B and a band filter 224B for the communication operator B. And a reception signal synthesis unit 225.

  The ON / OFF switching units 223A and 223B may be configured by, for example, a switch or an attenuator (ATT).

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, the bandpass filter 226, a communication operator A, as shown in FIG. 8 (b), the first frequency F1A after frequency conversion of B, transmission signal _S T1A downlink both _F1B, bandpass which passes _{S T1B} It is a filter.

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

When relaying downlink radio communication from the fixed base stations 30A and 30B to the mobile stations 40A and 40B in the second radio relay station (child unit) 20 of the configuration example of FIG. 7, the parent via the first antenna 201 The received signals _SR2A and _SR2B of the second frequency F2A and F2B received from the aircraft 10 are amplified by the amplifier 211 of the first radio communication unit 21, and after passing through the downlink radio relay switching unit 218, the frequency converter It is output to 231. In the frequency converter 231 second frequency F2A, first frequency F1A from F2B, converted received signal _S R1A to _{F1B, S R1B} is unnecessary signals through a band filter 226 of the second wireless communication section 22 is removed , And after being linearly amplified to a predetermined power (signal level) by the common amplifier 227, are transmitted toward the mobile stations 40A and 40B via the second antenna 202 as downlink transmission signals _ST1A and _ST1B. .

On the other hand, in the case of relaying uplink radio communication from the mobile stations 40A and 40B to the fixed base stations 30A and 30B in the second radio relay station (child unit) 20 in the configuration example of FIG. mobile station 40A, the first frequency F1A received from 40B ', F1B' received signal _{S R1A} of _{', S R1B'} is amplified by the amplifier 221 of the second wireless communication section 22 Te, uplink radio relay switch 228 , And is output to the frequency converter 232. First frequency F1A by the frequency converter 232 ', F1B' second frequency F2A from ', F2B' received signal is converted into _{S R2A ', S R2B'} passes through the bandpass filter 216 of the first wireless communication section 21 Unnecessary signals are removed, and after being linearly amplified to a predetermined power (signal level) by the common amplifier 217, they are transmitted via the first antenna 201 as transmission signals _{ST2A '} and _ST2B' for uplink relaying. It is sent toward the aircraft 10.

  FIG. 9 is a block diagram showing another configuration example of the first wireless relay station (master device) 10 corresponding to downlink and uplink two-way wireless relay in the wireless relay system according to the embodiment. The present configuration example is an example using a plurality of directional antennas 101A and 101B as the first antenna on the fixed base station side. In FIG. 9, the same parts as those in FIG. 5 described above are denoted by the same reference numerals, and the description will be omitted. Further, as the second wireless relay station (child unit) 20 to be combined with the first wireless relay station (master unit) 10 in this configuration example, the one illustrated in FIG. 7 described above can be used, so the description thereof is omitted. Do.

  In FIG. 9, the first antenna on the fixed base station side is configured 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. The directional antennas 101A and 101B are directional so that each of the fixed base stations 30A and 30B of the plurality of communication operators A and B can be tracked after the first wireless relay station (master device) 10 moves to the destination. It is configured to be able to adjust the orientation. The directional antennas 101A and 101B are based on position information and attitude information of the vehicle 50 on which the first wireless relay station (master device) 10 and the directional antennas 101A and 101B are mounted, and the communication operators A and B are used. The direction of directivity may be automatically controlled to track each of the fixed base stations 30A and 30B.

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

Received signal _{S R1A} of the distributed received signal distributor 119 uplink the same predetermined power Pr adjusted by the power adjusting unit _{', S R1B'} respectively, the transmission signal _{S T1A ', S T1B'} as, DUP110A, It is transmitted toward portable base stations 30A and 30B via 110B and the first antennas 101A and 101B.

The downlink radio signal of the first frequency F1A transmitted from the fixed base station 30A of the communication operator A is received by the directional antenna 101A directed to the fixed base station 30A, and the downlink radio relay is performed via the DUP 110A. It is 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 to the fixed base station 30B, and is downed through the DUP 110B. The link radio relay switching unit 118 is input.

  FIG. 10 is a block diagram showing still another configuration example of the first wireless relay station (master device) 10 corresponding to the downlink and uplink two-way wireless relay of the wireless relay system according to the embodiment. This configuration example is an example using a plurality of directional antennas 101A and 101B as the first antenna on the fixed base station side, as in the configuration example of FIG. In FIG. 10, the same parts as those in FIGS. 5 and 9 described above are designated by the same reference numerals, and the description will be omitted. Further, as the second wireless relay station (child unit) 20 to be combined with the first wireless relay station (master unit) 10 in this configuration example, the one illustrated in FIG. 7 described above can be used, so the description thereof is omitted. Do.

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

The uplink received 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 converted 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. Received signal _{S R1A} uplink the same predetermined power Pr adjusted by the power adjusting unit _{', S R1B'} respectively, the transmission signal _{S T1A ', S T1B'} as, DUP110A, 110B and the first antenna 101A, 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 wireless relay station (master device) 10 of FIG. Figure 12 (a) ~ (d), respectively, first radio relay station of FIG. 11 receives downlink signals prior to frequency conversion in the remote control (master unit) _{S R1A,} is an explanatory view of an output pattern of _{S R1B} . Figure 12 (e) ~ (h), respectively, illustrating the output patterns of the received signal _{S R1A} uplink before frequency conversion _{', S R1B'} in the remote control of the first radio relay station of FIG. 11 (Master) It is. In FIG. 11, the same parts as those in FIG. 5 described above are denoted by the same reference numerals, and the description will be omitted.

  In FIG. 11, the first radio relay station (master unit) 10 includes user terminals (mobile stations) 15A and 15B as control communication terminals for each of the communication operators A and B, and the control unit 14 performs communication. It has remote control units 141A and 141B corresponding to the operators A and B, respectively.

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, which is output to the frequency conversion unit 13, can be turned ON / OFF as shown in FIGS. 12 (e) to 12 (h).

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 conversion unit 13 can be turned ON / OFF as shown in FIGS. 12 (e) to 12 (h).

  FIG. 13 is a block diagram showing another example of the remote control system in the downlink signal processing path of the first wireless relay station (master device) 10 of FIG. In FIG. 13, the same parts as those in FIGS. 5 and 11 described above are designated by the same reference numerals, and the description will be 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 the plurality of communication operators A and B. Further, the remote control device 81A of the communication operator A can communicate with the user terminal (mobile station) 15B provided in the first wireless relay station (master device) 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 conversion unit 13 can be turned ON / OFF as shown in FIGS. 12 (e) to 12 (h) described above.

On the other hand, remote control unit 141A is not via user terminal (mobile station) 15A of communication operator A and fixed base station 30A, but via user terminal (mobile station) 15B of communication operator B, fixed base station 30B and mobile communication network 80B. Thus, the control information A from the remote control device 81A of the communication operator A can be received, and the 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, equalize the wireless relay areas (for example, the cells 200A and 200B of the slave unit 20) of the respective communication operators at the relay destination even if the propagation paths (propagation loss) of the wireless signals are different among a plurality of communication operators. An embodiment of a wireless relay system capable of

FIG. 14 is a schematic configuration diagram showing an entire configuration of a communication system including a radio relay system according to a comparative example.
FIG. _15A shows the frequency characteristics of the reception 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 device) 10 in FIG. FIG. 15B is a view showing frequency characteristics of the transmission signals _ST2A and _ST2B of the second frequencies F2A and F2B after frequency conversion in the downlink signal processing path and characteristics of a band pass filter.
Further, and FIG. 15 (c) first frequency F1A received by the antenna in the uplink signal processing path of the second wireless relay station (handset) 20 of FIG. 14 ', F1B' received signal _{S R1A} of _{', S R1B '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.
Further, FIG. 16 (a) second radio relay station of FIG. 14 (slave device) is received by the antenna at 20 for the downlink signal processing path the second frequency F2A, F2B of the received signal _{S R2A,} the frequency characteristics of _{S R2B} is a diagram showing a, FIG. 16 (b) is a diagram showing a first frequency F1A after frequency conversion in the downlink signal processing path, the transmission signal _S T1A of _F1B, the frequency characteristic and characteristic of the bandpass filter of _{S T1B} .
Further, FIG. 16 (c) shows received signals _{SR2A '} and _{SR2B 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 in 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 30A and 30B of the communication operators A and B and the base unit 10 are different from each other, they are received by the base unit 10 first frequency each communication operators a, B is utilized (radio relay frequency) F1A, F1B of the received signal _{S R1A,} sometimes power _{S R1B} is different (see FIG. 15 (a)). Therefore, the transmission powers of the second frequencies (intermediate frequencies) F2A and F2B after frequency conversion for linear amplification in the common amplifier in the parent device 10 are different (see FIG. 15B). As a result, as shown in FIG. 14, there is a possibility that the wireless relay areas (cells) 200A and 200B having different sizes from each other at the first frequencies (wireless relay frequencies) F1A and F1B of the communication operators A and B, respectively.

Furthermore, between the master unit 10 and the slave unit 20 on the downlink, the second frequency (radio relay frequency) F2A, F2B used by the plurality of communication operators A, B is different from each other due to the selective fading etc. The propagation paths (propagation loss) between the master unit 10 and the slave unit 20 are different from each other, and the powers of the reception signals _SR2A and _SR2B of the second frequencies (intermediate frequencies) F2A and F2B received by the slave unit 20 are different. (See FIG. 16 (a)). Therefore, the linear amplification to the first frequency after the frequency conversion (radio relay frequency) F1A, transmission signal _S T1A of _{F1B, S T1B} power are different from each other in a common amplifier in the slave device 20 (see FIG. 16 (b)). As a result, as shown in FIG. 14, there is a possibility that the wireless relay areas (cells) 200A and 200B having different sizes from each other at the first frequencies (wireless relay frequencies) F1A and F1B of the communication operators A and B, respectively.

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 handset 20 are different from each other, each telecom operator a to a first frequency which B is available (radio relay frequency) F1A ', F1B' received signal _{S R1A} of _{', S R1B'} is that the power of the different (see FIG. 15 (c)). Therefore, the transmission powers of the second frequencies (intermediate frequencies) F2A ′ and F2B ′ after frequency conversion to be linearly amplified by the common amplifier in the slave unit 20 are different (see FIG. 15 (d)). As a result, between the first frequencies (wireless relay frequencies) F1A 'and F1B' of the respective communication operators A and B, the master unit 10 can communicate with the portable base stations 30A and 30B of the respective communication operators A and B in the uplink. The wireless relay areas may be different from one another.

Furthermore, even between the uplink master unit 10 and the slave unit 20, selective fading and the like due to differences in the second frequencies (radio relay frequencies) F2A 'and F2B' used by the plurality of communication operators A and B, etc. Thus, the propagation paths (propagation losses) between the master unit 10 and the slave unit 20 are different from each other, and the reception signals SR 2 A _′ and S of the second frequencies (intermediate frequencies) F 2 A ′ and F 2 B ′ received by the master unit 10 are different. The power of _{R2B '} may be different (see FIG. 16 (c)). Therefore, the first frequency after frequency conversion to linear amplification in a common amplifier in the base unit 10 (radio relay Frequency) F1A ', F1B' transmits signal _{S T1A} of _{', S T1B'} power are different from each other (FIG. 16 (d )reference). As a result, between the first frequencies (wireless relay frequencies) F1A 'and F1B' of the respective communication operators A and B, the master unit 10 can communicate with the portable base stations 30A and 30B of the respective communication operators A and B in the uplink. The wireless relay areas may be different from one another.

  In the wireless relay system of the present embodiment, in consideration of the difference in propagation paths (propagation loss) in the plurality of communication operators A and B, transmission of at least one of the master unit 10 and the slave unit 20 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 master unit 10 and between the master unit 10 and the slave units 20 are the communication operators A and B. Even when they differ from each other, the sizes of the wireless relay areas (cells) 200A and 200B in which the mobile unit 20 can communicate with the mobile stations 40A and 40B can be made the same as each other, and The wireless relay areas communicable with each other can be the same as each other.

  FIG. 17 is 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 showing the example of composition of. In FIG. 17, the same parts as those in FIG. 5 described above are denoted by the same reference numerals, and the description will be omitted.

FIG. 18A shows the frequency characteristics of the reception 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 wireless relay station (master device) 10 in FIG. FIG. FIG. 18B is a diagram showing frequency characteristics of the reception signals _SR2A and _SR2B of the second frequencies F2A and F2B after frequency conversion and power adjustment in the downlink signal processing path of FIG. FIG. _18C is a diagram showing frequency characteristics of the transmission signals _ST2A and _ST2B transmitted from the second antenna 102 in the downlink signal processing path of FIG.

Further, FIG. 18 (d) second frequency F2A received by the antenna in the uplink signal processing path of the first radio relay station (base unit) 10 of FIG. 17 ', F2B' received signal _{S R2A} of _{', S R2B} It is a figure which shows the frequency characteristic of _' . Figure 18 (e) first frequency F1A after the frequency conversion and power adjustment in the uplink signal processing path in FIG. 17 ', F1B' received signal _{S R1A} of _{', S R1B'} in graph showing the frequency characteristic of the is there. FIG. _18F is a diagram showing frequency characteristics of transmission signals _{ST1A ′} and _{ST1B ′} transmitted from the first antenna 101 in the uplink signal processing path of FIG.

The first radio communication unit 11 of the first radio relay station (master unit) 10 in FIG. 17 does not have the downlink radio relay switching unit 118 described above, and the reception signals of the first frequencies F1A and F1B received by the first antenna 101 S _{R1A, S R1B} is directly input to the frequency converter 131. Figure 18 (a) are shown as received signal _{S R1A, S} power _R1B communication operator A, differs among B, and the frequency converter 131 second frequency F2A, the received signal is converted into F2B _{S R2A,} S The power of _R2B also differs between the communication operators A and B. The second wireless communication unit 12 performs an automatic gain control (AGC) function for each of the communication operators A and B so that the powers of the reception signals _SR2A and _SR2B become the predetermined same power Pr shown in FIG. And a plurality of power adjustment units 1210A and 1210B. For example, as shown in FIG. 18B, the plurality of power adjustment units 1210A and 1210B respectively include band pass filters (BPFs) 1211A and 1211B that allow the wireless relay frequencies F1A and F1B of the communication operators A and B to selectively pass. Amplifiers 1212A and 1212B with 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 passing through the band pass filters (BPFs) 1211A and 1211B to a predetermined power Pr Prepare. Each power adjuster 1210A, the reception signal _S R2A of the same predetermined power Pr adjusted by the _{1210B, S R2B} is unnecessary signals are removed by passing through a bandpass filter 126, a predetermined power by a common amplifier 127 (signal level 18 (c), and is transmitted toward the slave 20 through the second antenna 102 as transmission signals _ST2A and _ST2B shown in FIG. 18 (c). Note that the common amplifier 127 may not have an automatic gain control (AGC) function because it is adjusted to a predetermined power by the power adjustment units 1210A and 1210B.

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 receives the second frequencies F2A ′ and F2B received by the second antenna 102. The 'received signals S _R2A' and S _{R2 B 'of'} are directly input to the frequency converter 132. Figure 18 (d) the received signal _{S R2A} as shown in _{', S R2B'} power of for different communication operators A, B, a first frequency F1A by the frequency converter 132 ', F1B' received signal converted into _{S R1A ',} S _R1B' power also varies between communication operators a, B. The received signal _{S R1A ', S R1B'} as power becomes a predetermined same power Pr shown in FIG. 18 (e), the first radio communication unit 11, communication operators A, automatic gain control (AGC for each B ) And a plurality of power adjustment units 1110A and 1110B having a function. For example, as shown in FIG. 18E, the plurality of power adjustment units 1110A and 1110B respectively include band pass filters (BPFs) 1111A and 1111B that selectively pass the radio relay frequencies F1A ′ and F1B ′ of the communication operators A and B. And an amplifier 1112A with an automatic gain control (AGC) function to set the power of the reception signals of the radio relay frequencies F1A ′ and F1B ′ of the communication operators A and B that have passed each band pass filter (BPF) 1111A and 1111B to a predetermined power Pr , 1112 B. Each power adjuster 1110A, the reception signal _{S R1A} of the same predetermined power Pr adjusted in 1110B _{', S R1B'} is unwanted signal is removed by passing through a bandpass filter 116, a predetermined power by a common amplifier 117 ( after being linearly amplified to the signal level), the transmission signal _{S T1A} shown in FIG. _{18 (f) ', S T1B} ' as a cellular base station 30A via the first antenna 101, is transmitted to the 30B. Note that the common amplifier 117 may not have an automatic gain control (AGC) function because the power adjustment units 1110A and 1110B adjust the power to a predetermined power.

  FIG. 19 is still another example of the second radio relay station (child device) 20 that adjusts the downlink and uplink transmission power corresponding to the downlink and uplink bi-directional radio relays of the radio relay system according to the embodiment. It is a block diagram showing the example of composition of. In FIG. 19, the same parts as those in FIG. 7 described above are denoted by the same reference numerals, and the description will be omitted.

FIG. 20A shows the frequency characteristics of the reception 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 (child device) 20 in FIG. FIG. Figure 20 (b) is a diagram showing a first frequency F1A after the frequency conversion and power adjustment in the downlink signal processing path in FIG. 19, the received signal _S R1A of _F1B, the frequency characteristics of _{S R1B.} FIG. 20C is a diagram showing frequency characteristics of the transmission signals _ST1A and _ST1B transmitted from the second antenna 202 in the downlink signal processing path of FIG.

_{20D shows} received signals S _{R1A ′} , S of the first frequencies F1A ′ and F1B ′ received by the antenna 202 in the uplink signal processing path of the second radio relay station (child unit) 20 of FIG. It is a figure which shows the frequency characteristic of _{R1B '} . FIG. 20 (e) is a diagram showing frequency characteristics of received signals _{SR2A ′} and _{SR2B ′} of the second frequencies F2A ′ and F2B ′ after frequency conversion and power adjustment in the uplink signal processing path of FIG. is there. FIG. 20 (f) is a diagram showing frequency characteristics of the transmission signals _{ST2A ′} and _{ST2B ′} transmitted from the first antenna 201 in the uplink signal processing path of FIG.

The first radio communication unit 21 of the second radio relay station (child unit) 20 in FIG. 19 does not have the downlink radio relay switching unit 218 described above, and the reception signals of the second frequencies F2A and F2B received by the first antenna 201 _SR2A and _SR2B are directly input to the frequency converter 231. Figure 20 (a) are shown as received signal _{S R2A, S} power _R2B communication operator A, differs among B, and the frequency converter 231 first frequency F1A, the received signal is converted into F1B _{S R1A,} S The power of _R1B also differs between the communication operators A and B. The received signal _{S R1A,} as the power of _{S R1B} is given the same power Pr shown in FIG. 20 (b), the second radio communication unit 22, communication operator A, the automatic gain control for each B (AGC) function Power adjustment units 2210A and 2210B. Each of the plurality of power adjustment units 2210A and 2210B, for example, includes band pass filters (BPFs) 2211A and 2211B for selectively passing the first frequencies F1A and F1B of the communication operators A and B as shown in FIG. Amplifiers 2212A and 2212 with an automatic gain control (AGC) function for setting the power of the reception signals of the first frequencies F1A and F1B of the communication operators A and B passed through the band pass filters (BPFs) 2211A and 2211B to a predetermined power Pr Prepare. Each power adjuster 2210A, the reception signal _S R1A of the same predetermined power Pr adjusted by _{2210b, S R1B} is unnecessary signals are removed by passing through a bandpass filter 226, a predetermined power by a common amplifier 227 (signal level After being linearly amplified, the signals are transmitted toward the mobile stations 40A and 40B via the second antenna 202 as transmission signals _ST1A and _ST1B shown in FIG. Note that the common amplifier 227 does not have to have an automatic gain control (AGC) function because it is adjusted to a predetermined power by the power adjustment units 2210A and 2210B.

The second radio communication unit 22 of the second radio relay station (child unit) 20 in FIG. 19 does not have the above-described uplink radio relay switching unit 228, and receives the first frequencies F1A ′ and F1B ′ received by the second antenna 202. received signal _{S R1A ', S R1B'} is directly input to the frequency converter 232. Figure 20 receives signals as shown in _{(d) S R1A ', S} R1B' for power is different between communication operators A, B, by the frequency converter 232 second frequency F2A, the received signal is converted into F2B _{S R2A} The powers of _' , _SR2B' also differ between the communication operators A and B. The first wireless communication unit 21 performs automatic gain control (AGC) for each of the communication operators A and B so that the power of the received signals _{SR2A ′} and _{SR2B ′} becomes the predetermined same power Pr shown in FIG. ) And a plurality of power adjustment units 2110A and 2110B having a function. For example, as shown in FIG. 20 (e), the plurality of power adjustment units 2110A and 2110B respectively include band pass filters (BPFs) 2111A and 2111B that selectively pass the second frequencies F2A ′ and F2B ′ of the communication operators A and B. , And an amplifier 2112A with an automatic gain control (AGC) function to make the power of the reception signal of the second frequencies F2A 'and F2B' of the communication operators A and B passed through each band pass filter (BPF) 2111A and 2111B to a predetermined power Pr. , 2112 B. Each power adjuster 2110A, the reception signal _{S R2A} of the same predetermined power Pr adjusted in 2110B _{', S R2B'} are unnecessary signal is removed by passing through the bandpass filter 216, a predetermined power by a common amplifier 217 ( After being linearly amplified to the signal level, the signal is transmitted toward the portable base stations 30A and 30B via the first antenna 201 as the transmission signals _{ST2A '} and _ST2B' shown in FIG. Note that the common amplifier 217 may not have an automatic gain control (AGC) function because it is adjusted to a predetermined power by the power adjustment units 2110A and 2110B.

  FIG. 21 is still another one of the first wireless relay station (master device) 10 that adjusts the downlink and uplink transmission power corresponding to the downlink and uplink bi-directional wireless relay of the wireless relay system according to the embodiment. It is a block diagram showing the example of composition of. The present configuration example is an example using a plurality of directional antennas 101A and 101B as the first antenna on the fixed base station side. In FIG. 21, the same parts as those in FIG. 5, FIG. 9 and FIG. Further, as the second wireless relay station (child unit) 20 to be combined with the first wireless relay station (master unit) 10 in this configuration example, the one illustrated in FIG. 19 described above can be used, so the description thereof is omitted. 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, respectively After being synthesized by the reception signal synthesis unit 115, the frequency converter 131 is inputted.

  FIG. 22 is still another one of the first wireless relay station (master device) 10 that adjusts the downlink and uplink transmission power corresponding to the downlink and uplink two-way wireless relay of the wireless relay system according to the embodiment. It is a block diagram showing the example of composition of. The present configuration example is an example using a plurality of directional antennas 101A and 101B as the first antenna on the fixed base station side. In FIG. 22, the same parts as those in FIG. 5, FIG. 9, FIG. 10 and FIG. Further, as the second wireless relay station (child unit) 20 to be combined with the first wireless relay station (master unit) 10 in this configuration example, the one illustrated in FIG. 19 described above can be used, so the description thereof is omitted. 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, respectively After being synthesized by the reception signal synthesis unit 115, the frequency converter 131 is inputted.

  FIG. 23 is a block diagram showing an example of a remote control system in the downlink signal processing path and the uplink signal processing path of the first wireless relay station (base unit) 10 of FIG. 17 that performs transmission power adjustment of the downlink and uplink FIG. In FIG. 23, the same parts as those in FIGS. 11 and 17 described above are designated by the same reference numerals, and the description will be omitted.

In FIG. 23, the remote control unit 141A is, for example, based on the control information A received from the remote control device 81A of the communication operator A, the power adjustment unit 1210A of the downlink signal processing path and the power adjustment unit of the uplink signal processing path 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) described above.

In addition, remote control unit 141B, for example, based on control information B received from remote control device 81B of communication operator B, power adjustment unit 1210B of the downlink signal processing path and power adjustment unit 1110B of the uplink signal processing path. 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) described above.

  FIG. 24 is a block diagram showing another example of the remote control system in the downlink signal processing path of the first wireless relay station (master device) 10 of FIG. 17 which adjusts the transmission power of the downlink. In FIG. 24, the same parts as those in FIGS. 11, 12, 17 and 23 described above are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 24, the remote control unit 141B is, for example, based on the control information B received from the remote control device 81B of the communication operator B, the power adjustment unit 1210B of the downlink signal processing path and the power adjustment unit of the uplink signal processing path 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) described above.

On the other hand, the remote control unit 141A is not, for example, the user terminal (mobile station) 15A of the communication operator A and the fixed base station 30A, but the user terminal (mobile station) 15B of the communication operator B, the fixed base station 30B and the mobile communication network 80B. Control information A 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 of the above configuration, the master unit 10 uses the first antenna 101 for the mobile base station (fixed base stations 30A and 30B) to transmit the mobile base stations of a plurality of communication operators A and B. (Fixed base station) 30A, 30B receives the radio signal of the first frequency F1A, F1B transmitted respectively and converts it to the second frequency F2A, F2B by the frequency converter (frequency converter) 13, and for the radio relay station The second antenna 102 transmits the signal to the slave 20. The slave unit 20 receives the radio waves transmitted from the master unit 10 at the second frequencies F2A and F2B at the first antenna 201 for the parent device, and the frequency converter 23 (frequency converter) sets the first frequencies F1A and F1B. The frequency is converted and transmitted by the second antenna 202 for mobile station (user terminal).

  In addition, the slave unit 20 receives the radio signals of the first frequencies F1A ′ and F1B ′ transmitted by the mobile stations 40A and 40B corresponding to the plurality of communication operators A and B by the second antenna 202 for mobile station. Then, it is converted to the second frequencies F2A ′ and F2B ′ by the frequency conversion unit (frequency converter) 23 and transmitted toward the base unit 10 by the first antenna 201 for the wireless relay station. The master unit 10 receives radio waves transmitted from the slave unit 20 at the second frequencies F2A 'and F2B' at the second antenna 102 for the radio relay station, and the frequency conversion unit (frequency converter) 13 measures the first frequency F1A. The frequency is converted to ', F1B' and transmitted by the first antenna 101 directed to the portable base station (fixed base stations 30A and 30B).

  By performing the above-mentioned frequency conversion, it is possible to transmit the transmission power of the child device 20 at the maximum transmission power because the interference of the same frequency between the antennas 201 and 202 of the child device 20 is eliminated.

  The first frequencies F1A / F1A 'and F1B / F1B' used in the radio relay system generally use the same frequency as the frequency used by the mobile base stations (fixed base stations 30A and 30B).

  Further, since base unit 10 is “wirelessly connected” to the mobile base stations (fixed base stations 30A and 30B) of communication operators A and B, base station 10 is a mobile base station (fixed of each communication operators A and B (fixed It can be fixedly installed at any place within the area of the base stations 30A and 30B), and can also be run in a specific direction. For example, it is possible to travel in the direction of the handset 20 and extend the area of the handset 20 to the out-of-service area of the portable base stations (fixed base stations 30A and 30B).

  As described above, according to the present embodiment, after the first radio relay station 10 is mounted on a car and moved to the target position, the connection work to the core network as in the case of mounting the base station and the setup work of the base station Since it is not necessary to carry out, it is possible to promptly start relay of wireless communication between the fixed base stations 30A, 30B of the plurality of communication operators A, B and the mobile stations (user apparatuses) 40A, 40B.

  Further, according to the present embodiment, the base station device (eNodeB) is unnecessary for the parent device 10, and the configuration is simple.

  Further, according to the present embodiment, since the radio frequencies (F1A / F1A ′, F1B / F1B ′) of the mobile base stations (fixed base stations 30A, 30B) of the communication operators A, B are used in the radio relay system, It is not necessary to prepare various frequencies, 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 device) 10 It is possible to transmit and receive radio relays by transmitting and receiving to and from mobile base stations (fixed base stations 30A and 30B) of a plurality of different communication operators A and B using nondirectional antennas. Further, since the number of the first antennas 101 for mobile base stations is one, the configuration is simple.

  Particularly, according to the configuration example of FIGS. 9 and 21, a plurality of directional antennas 101A serving as a first antenna for the portable base station (fixed base stations 30A and 30B) of the first radio relay station (master unit) 10 The communication quality of each of the communication operators A and B can be improved by transmitting and receiving to and from the mobile base stations (fixed base stations 30A and 30B) for each of the communication operators A and B using B., 101B.

  In particular, according to the configuration example of FIGS. 17 to 24, AGC (Auto Gain Control) is generated for each downlink radio relay frequency (first frequency) F1A, F1B received by the first radio relay station (master device) 10. Is applied so that the outputs of the radio signals for the slave units of the intermediate frequency (second frequency) F2A, F2B corresponding to each of the communication operators A, B become the same power. Also, AGC is applied to each of the intermediate frequencies (second frequencies) F2A and F2B received by the second wireless relay station (child unit) 20, and the radio relay frequencies (first frequencies) F1A of the communication operators A and B are applied. , F1B to the mobile station so as to control the same power. By controlling the power adjustment of the first radio relay station (master unit) 10 and the second radio relay station (child unit) 20, a radio relay for the second radio relay station (child unit) 20 to the mobile station in the downlink Since the transmission powers of the frequencies (first frequencies) 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 frequencies) F1A and F1B corresponding to the communication operators A and B. ) Will be the same.

  Similarly, AGC is applied to each of the uplink radio relay frequencies (first frequencies) F1A ′ and F1B ′ received by the second radio relay station (child unit) 20 to correspond to the communication operators A and B. Control is performed so that the outputs of the radio signals for the parent device at intermediate frequencies (second frequencies) F2A 'and F2B' become the same power. In addition, AGC is applied to each of the intermediate frequencies (second frequencies) F2A ′ and F2B ′ received by the first radio relay station (master unit) 10 to transmit the radio relay frequencies (first frequencies of the communication operators A and B). ) The outputs of the F1A ′ and F1B ′ for the mobile base station (fixed base stations 30A and 30B) are controlled to have the same power. By controlling the power adjustment of the first radio relay station (master unit) 10 and the second radio relay station (child unit) 20, the mobile base station (fixed base station) of the first radio relay station (master unit) 10 in the uplink Since the transmission powers of the radio relay frequencies (first frequencies) F1A 'and F1B' for the stations 30A and 30B are the same, radio relay frequencies (first frequencies) F1A 'and F1B corresponding to the respective communication operators A and B. The wireless relay areas (areas that can communicate with the mobile base stations of the communication operators A and B) are the same.

  Further, according to the present embodiment, the mobile base station area of each of the communication operators A and B (the cells 300A and 300B of the fixed base stations 30A and 30B) and the wireless relay area (the cell 200 of the slave device 20) Even if there is an overlap, since the mobile base station (fixed base stations 30A and 30B) and the radio relay system transmit the same signal, the mobile stations (user terminals) 40A and 40B located in the overlap area interfere with each other It does not become. 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, 300B) of the mobile base stations (fixed base stations 30A, 30B) of the communication operators A, B. It can move. For example, if the base unit 10 is moved to the area end of the mobile base station (cell end of the fixed base stations 30A and 30B), it can be relayed to the base unit 20 from there, extending the service area of the wireless relay system 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 by mounting the parent device 10 on a car 50 or the like and traveling. For example, when searching for a victim outside the service area (cells 300A and 300B) of the mobile base stations (fixed base stations 30A and 30B) of each of the communication operators A and B, the area can be continuously expanded. The range can be easily expanded in a short time. In particular, as the traveling speed of the automobile 50 or the like is higher, the area can be expanded in a short time (see FIG. 27).

  Further, according to the present embodiment, the parent device 10 controls the remote control communication ON / OFF or the power ON / OFF and the monitoring of the device by the aforementioned user terminal (mobile station) 15 (15A, 15B). Communication can be performed between the control unit 14 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 slave unit 20 performs remote control communication ON / OFF, power ON / OFF control, and gain control of the amplifier (AMP) of the wireless communication unit by the above-mentioned user terminal (mobile station) 25 (25A, 25B). Communication can be performed between the control unit 24 which 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 remotely control the start and end of the communication of the wireless relay system by remotely performing ON / OFF control of the communication of the parent device 10 or ON / OFF control of the power supply. For example, when the master unit 10 and the slave unit 20 are installed in a predetermined place, the remote control devices 81A and 81B (control sources) provided in the communication operators A and B remotely turn on / off communication of the master unit 10 or the power supply Perform ON / OFF control of. This enables remote control of the start and stop of communication of the wireless relay system for each of the communication operators A and B.

  Similarly, by remotely controlling ON / OFF of the power supply of the slave 20 after the communication of the master 10 is ON, the slave 20 can also control the start and stop of the communication of the wireless relay system. Also, gain control (maximum transmission power control) of the amplifier (AMP) of the slave unit 20 can be performed remotely.

  Further, according to the present embodiment, the installation work of the wireless relay system (the master unit 10 and the slave unit 20) can be performed by a local worker (a worker who can not operate the apparatus), and the operation of the wireless relay system Can be implemented remotely by a communications operator. As a result, there is no need for the operator of the communication operator to go to the site and perform installation work, so it is expected that the operation can be efficiently performed and the time to start the operation can be significantly shortened.

  Further, according to the present embodiment, since the operation of the wireless relay can be controlled (permitted) by the communication operator, the wireless relay can be prevented from being executed freely. Therefore, it is possible to place the wireless medium-term office in various places in advance in preparation for disasters and the like.

  Further, according to the present embodiment, when the radio relay system interferes with the service area (cell 300C) of another portable base station (fixed base station 30C), the gain (Amp) of the handset 20 (amplifier (AMP)) By reducing and controlling the maximum transmission power, it is possible to suppress pre-interference to the service area (cell 300C) of another mobile base station (fixed base station 30C) (see FIG. 28).

  Note that the processing steps described in this specification and the components of the wireless relay station, the remote control device, and the base station device in 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.

  Regarding the hardware implementation, the above processes and the processes in the entity (eg, wireless relay station, base station apparatus, wireless relay apparatus, user apparatus (mobile station, communication terminal), remote control apparatus, hard disk drive apparatus, or optical disk drive apparatus) The means, such as processing units, used to implement the components may be 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 units designed to perform the functions described herein, computer Or their pairs It may be implemented in the suit.

  Also, for firmware and / or software implementations, means such as processing units used to implement the above components may be programs (eg, procedures, functions, modules, instructions for performing the functions described herein) , Etc.) may be implemented. In general, any computer / processor readable medium tangibly embodying firmware and / or software codes such as a processing unit or the like used to implement the above described processes and components described herein. May be used to implement For example, firmware and / or software code may be stored in memory, for example on a controller, and executed by a computer or processor. The memory may be implemented inside a computer or processor, or may be implemented outside the processor. Also, the firmware and / or software code may be, for example, random access memory (RAM), read only memory (ROM), non-volatile random access memory (NVRAM), programmable read only memory (PROM), electrically erasable PROM (EEPROM) ), Computer- and processor-readable media such as 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 perform certain aspects of the functionality described herein.

  Additionally, the description of the embodiments disclosed herein is 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 present disclosure. Thus, the present disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

10: 1st wireless relay station (master unit)
101, 101A, 101B: first antenna 102: second antenna 11: first wireless communication unit 111: amplifier for reception 112: reception signal distribution unit 113A, 113B: ON / OFF switching unit 114A, 114B: band pass filter 115: Received signal combining unit 116, 116A, 116B: Band pass filter 117, 117A, 117B: Common amplifier 118: Downlink radio relay switching unit 119: Received signal distribution unit 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: reception signal distribution unit 123A, 123B: ON / OFF switching unit 124A, 124B: band pass filter 125: Received signal combining unit 126: Band filter 127: Common amplifier 128: Uplink radio relay switching unit 1210A, 1210B Power adjustment unit 1211A, 1211B Band filter (BPF)
1212A, 1212B Amplifier with automatic gain control (AGC) function 13: Frequency converter 131, 132: Frequency converter 14: Controller 141A, 141B: Remote controller 20: Second wireless relay station (child unit)
200A, 200B: wireless relay area 201: first antenna 202: second antenna 21: first wireless communication unit 211: amplifier for reception 212: received signal distribution unit 213A, 213B: ON / OFF switching unit 214A, 214B: band Filter 215: Received signal addition unit 216: Band pass filter 217: Common amplifier 218: Downlink radio relay switching unit 2110A, 2110B: Power adjustment unit 2111A, 2111B: Band pass filter (BPF)
2112A, 2112B: amplifier with automatic gain control (AGC) function 22: second wireless communication unit 221: amplifier for reception 222: reception signal distribution unit 223A, 223B: ON / OFF switching unit 224A, 224B: band pass filter 225: Received signal combining unit 226: Band pass filter 227: Common amplifier 228: Uplink radio relay switching part 2210A, 2210B: Power adjustment part 2211A, 2211B: Band pass filter (BPF)
2212A, 2212B: amplifier with automatic gain control (AGC) function 23: frequency converter 231, 232: frequency converter 24: controller 30A, 30B: fixed base station (mobile base station)
30C: Fixed base station (mobile base station)
31A, 31B: Antenna 40A, 40B: Mobile station (user apparatus)
50: Car 60: Balloon (moored balloon)
70: Small aircraft (drone)
80A, 80B: Mobile communication network 81A, 81B: Remote control device

Claims (13)

A wireless relay system relaying wireless communication between fixed base stations of a plurality of communication operators having different radio signal frequencies and user equipment,
A movable first wireless relay station, and a second wireless relay station positioned higher than the first wireless relay station;
A first wireless communication unit configured to transmit and receive wireless signals of a plurality of different first frequencies respectively corresponding to the plurality of fixed base stations with the fixed base stations of the plurality of communication operators; A second wireless communication unit for transmitting and receiving wireless signals of a plurality of different second frequencies corresponding to the plurality of communication operators with the second wireless relay station; and of 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 among the plurality of communication operators.
The second wireless relay station transmits a plurality of wireless signals of the second frequency to and from the first wireless relay station, and the plurality of first frequencies to and from the user apparatus. A second wireless communication unit that transmits and receives a wireless signal, a frequency conversion unit that performs frequency conversion of the first frequency and the second frequency, and signal power after frequency conversion is equal to each other among the plurality of communication operators And a signal power adjustment unit for adjusting the frequency. In the wireless relay system of claim 1,
The signal power adjusting unit of each of the first wireless relay station and the second wireless relay station selectively transmits a signal of the frequency of the communication operator for each of the plurality of communication operators, and the band filter A radio relay system comprising: an amplifier with an automatic gain adjustment which adjusts signal power after passing through to a predetermined power. In the wireless relay system of claim 1 or 2,
The first wireless relay station is capable of adjusting or controlling its direction so as to track fixed base stations of the plurality of communication operators, or fixed base stations of the plurality of communication operators. A wireless relay system comprising: an adaptive antenna composed of a plurality of elements capable of forming a beam so as to track the A wireless relay system relaying wireless communication between fixed base stations of a plurality of communication operators having different radio signal frequencies and user equipment,
A movable first wireless relay station, and a second wireless relay station positioned higher than the first wireless relay station;
A first wireless communication unit configured to transmit and receive wireless signals of a plurality of different first frequencies respectively corresponding to the plurality of fixed base stations with the fixed base stations of the plurality of communication operators; A second wireless communication unit for transmitting and receiving wireless signals of a plurality of different second frequencies corresponding to the plurality of communication operators with the second wireless relay station; and of the first frequency and the second frequency And a frequency converter for frequency conversion,
The second wireless relay station transmits a plurality of wireless signals of the second frequency to and from the first wireless relay station, and the plurality of first frequencies to and from the user apparatus. 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 wireless relay station is capable of adjusting or controlling its direction so as to track fixed base stations of the plurality of communication operators, or fixed base stations of the plurality of communication operators. A wireless relay system comprising: an adaptive antenna composed of a plurality of elements capable of forming a beam so as to track the 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 that interference of radio signals at the first wireless relay station and interference of wireless signals at the second wireless relay station do not occur. A radio relay system characterized by having a frequency. The radio relay system according to any one of claims 1 to 5,
The wireless relay system according to claim 1, wherein the first wireless relay station is mounted on a mobile movable on the ground. The radio relay system according to any one of claims 1 to 6.
The wireless relay system according to claim 1, wherein the second wireless relay station is mounted on a balloon. In the wireless relay system of claim 7,
The wireless relay system according to claim 1, wherein the first wireless relay station is mounted on a mobile unit, and a balloon on which the second wireless relay station is mounted is anchored to another mobile unit different from the mobile unit. The radio relay system according to any one of claims 1 to 6.
The wireless relay system according to claim 1, wherein the second wireless relay station is mounted on an aircraft which stays or moves in a predetermined airspace by autonomous control or external control. In the wireless relay system of claim 9,
The wireless relay system according to claim 1, wherein the first wireless relay station is mounted on a mobile unit, and the mobile unit is provided with a takeoff / attachment unit capable of moving on / off the flight unit. The radio relay system according to any one of claims 1 to 10.
The first wireless relay station includes a directional antenna whose direction can be controlled to track the second wireless relay station, or a plurality of elements capable of forming a beam to track the second wireless relay station. A wireless relay system comprising an adaptive antenna. The radio relay system according to any one of claims 1 to 11.
The first wireless relay station turns on relay of a wireless signal with the fixed base station and a wireless signal with the second wireless relay station according to external control information for each of the plurality of communication operators. A wireless relay system comprising: a control unit that performs on / off control. The radio relay system according to any one of claims 1 to 12.
The second wireless relay station transmits information indicating the status of at least one of transmission and reception of a radio signal to and from the user apparatus having the first frequency for each of the plurality of communication operators, as an external predetermined transmission destination A wireless relay system comprising: means for transmitting to.

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