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WO2016208270A1 - Appareil de commande d'antenne - Google Patents

Appareil de commande d'antenne Download PDF

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Publication number
WO2016208270A1
WO2016208270A1 PCT/JP2016/063070 JP2016063070W WO2016208270A1 WO 2016208270 A1 WO2016208270 A1 WO 2016208270A1 JP 2016063070 W JP2016063070 W JP 2016063070W WO 2016208270 A1 WO2016208270 A1 WO 2016208270A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
signal
mobile station
antennas
antenna control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2016/063070
Other languages
English (en)
Japanese (ja)
Inventor
周作 梅田
西本　浩
彰浩 岡崎
薫 塚本
歌奈子 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2017524708A priority Critical patent/JP6351846B2/ja
Publication of WO2016208270A1 publication Critical patent/WO2016208270A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/30—Special cell shapes, e.g. doughnuts or ring cells
    • H04W4/04—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication

Definitions

  • This application relates to an antenna control device that controls a plurality of distributed antennas.
  • a linear distributed antenna configuration is one of the antenna configurations of a wireless communication system that realizes wireless communication with a mobile station moving at high speed in a high-speed land mobile environment represented by a highway and a railway.
  • the linear distributed antenna configuration is characterized by having an antenna facility that installs a plurality of antennas distributed along the path of the mobile station.
  • a plurality of antennas are extended along the moving direction of a mobile station moving at high speed, and the same signal is sent to the mobile station via each antenna.
  • there is a communication area that transmits synchronously from a base station that is, a so-called linear cell.
  • the linear cell can limit the radiation direction or directivity (sensitivity direction) of the antenna to the moving range of the mobile station. For this reason, the linear cell can extend the communication range handled by one antenna as compared to the case of using an omnidirectional antenna. As a result, the linear cell can reduce the number of antennas required to construct the antenna equipment.
  • the present invention has been made in view of the above, and an object of the present invention is to provide an antenna control device capable of reducing radio wave interference to neighboring communication areas using the same frequency.
  • the present invention provides a plurality of antennas that transmit and receive signals generated by a base station to and from a mobile station that moves on a predetermined route.
  • a radio communication system comprising a plurality of linear cells formed by being installed along an antenna control device for controlling transmission / reception of signals performed via the antenna, wherein the mobile station is located in the linear cell.
  • a first signal for confirming whether or not the second signal is transmitted periodically through the plurality of antennas, and based on whether or not a second signal that is a response signal to the first signal is received,
  • the mobile station existing in the linear cell is detected, and data transmission with the mobile station is executed using the antenna selected based on the reception level of the second signal.
  • FIG. 3 is a block diagram illustrating an example of a functional configuration of the antenna control device according to the first embodiment.
  • FIG. The flowchart which shows the flow of a process of the antenna control apparatus which concerns on Embodiment 1.
  • FIG. Diagram for explaining radio wave interference between linear cells The figure which shows the structural example of the radio
  • FIG. The figure which shows the modification of the linear cell which comprises a radio
  • the radio communication system assumes a multi-linear cell configuration system in which a plurality of linear cells are linearly installed.
  • the wireless communication system according to each embodiment is a wireless communication between a communication device mounted on a moving body that moves along a predetermined route, such as a train traveling on a track and a vehicle traveling on a highway.
  • wireless communication is performed with an independent communication device possessed by a person who gets on a train and a vehicle.
  • a communication device mounted on a moving body such as a train and a vehicle and a communication device possessed by a person who gets on the train and the vehicle are collectively referred to as a mobile station.
  • the radio communication system can apply frequency repetition when assigning a frequency for signal transmission to each linear cell.
  • Frequency repetition is one frequency selected from several frequencies for each of the linear cells in accordance with a repetition pattern composed of several frequencies so that the frequency used for signal transmission differs between adjacent linear cells. Assign.
  • the radio communication system according to each embodiment can employ any number of repetitions such as two-frequency repetition and three-frequency repetition.
  • Each linear cell transmits a signal generated by the base station using a frequency assigned to the own cell.
  • FIG. 1 is a diagram illustrating a configuration example of a radio communication system 10 according to the first embodiment.
  • a radio communication system 10 according to Embodiment 1 includes a base station 1, a plurality of distributed antennas 3-1a,..., 3-Na, an antenna control device 4, and a range 5- 1a,..., A linear cell 5 formed of a range 5-Na.
  • a train that is the mobile station 2 moves on a track that is a predetermined route 8.
  • FIG. 2 is a diagram illustrating an example of a signal generated by the base station.
  • the signal generated by the base station 1 is configured to include a presence line confirmation channel C1 and a data transmission channel C2.
  • the presence line confirmation channel C1 is a channel corresponding to transmission of a beacon or the like for confirming whether the mobile station 2 exists in the linear cell.
  • the data transmission channel C2 is a channel corresponding to transmission of various data signals exchanged between the base station 1 and the mobile station 2.
  • a plurality of distributed antennas 3-1a,..., 3-Na are generated by the base station 1 with the mobile station 2 moving along a predetermined path 8. Send a signal.
  • the distributed antenna has directivity.
  • the distributed antenna is installed in a state where the sensitivity direction is aligned with the moving direction of the mobile station 2 moving at high speed.
  • Each distributed antenna is individually responsible for the communication range. For example, as shown in FIG. 1, the distributed antenna 3-1a is responsible for the range 5-1a, and the distributed antenna 3-Na is responsible for the range 5-Na.
  • the linear cell shown in FIG. 1 forms one communication area with the total range of the ranges 5-1a,.
  • the distributed antennas 3-1a,..., 3-Na are examples of antennas.
  • FIG. 3 is a block diagram illustrating a functional configuration example of the antenna control apparatus according to the first embodiment.
  • the antenna control device 4 includes an antenna control unit 41 and a power adjustment unit 42.
  • the antenna control unit 41 is an example of an antenna control unit.
  • the power adjustment unit 42 is an example of a power adjustment unit.
  • the antenna control unit 41 periodically transmits an on-line confirmation signal for confirming whether the mobile station 2 exists in the linear cell via each of the distributed antennas 3-1a,..., 3-Na. And the antenna control part 41 detects the mobile station 2 which exists in a linear cell based on the presence or absence of reception of the standing line response signal which is a response signal with respect to a standing line confirmation signal. Specifically, the antenna control unit 41 confirms reception of the standing line response signal via at least one of the distributed antennas 3-1a,..., 3-Na, and enters the mobile station 2 in the linear cell. Is determined to be detected.
  • the standing line confirmation signal is an example of a first signal
  • the standing line response signal is an example of a second signal.
  • the antenna control unit 41 uses a distributed antenna whose reception level, which is the strength of the standing line response signal, is greater than or equal to a threshold value from among a plurality of distributed antennas. Data transmission between them.
  • the antenna control unit 41 uses the average of the instantaneous values of signals received by the presence line confirmation channel C1 within a certain time after each of the antennas transmits the standing line response signal as the reception level.
  • An RSSI Receiveived Signal Strength Indicator
  • the power adjustment unit 42 adjusts transmission power when transmitting a signal from the distributed antenna according to the reception level of the on-line response signal. For example, the power adjustment unit 42 makes the transmission power of the distributed antenna whose reception level of the standing line response signal is equal to or greater than the threshold value smaller than the transmission power at the normal time. Alternatively, the power adjustment unit 42 may adjust the transmission power of the distributed antenna so that the transmission power decreases as the reception level of the standing line response signal increases.
  • FIG. 4 is a diagram showing an outline of processing of the antenna control apparatus according to the first embodiment.
  • the antenna control device 4 transmits a standing line confirmation signal 6a for confirming whether the mobile station 2 exists in the linear cell at a predetermined timing to each of the distributed antennas 3-1a,. Periodically.
  • step S12 when the antenna control device 4 detects the mobile station 2, the antenna control device 4 designates a distributed antenna whose reception level of the standing line response signal 7 transmitted from the mobile station 2 is equal to or greater than a threshold value as the distributed antenna 3-1a,. ⁇ ⁇ Detects from 3-Na.
  • the antenna control device 4 detects the distributed antenna 3-1a and the distributed antenna 3-2a as distributed antennas whose reception level of the standing line response signal 7 is equal to or greater than the threshold, the antenna control device 4 uses the distributed antenna 3-1a and the distributed antenna 3-2a. To select the antenna that transmits the data signal 6b.
  • the antenna control device 4 adjusts the transmission power of the signals of the distributed antenna 3-1a and the distributed antenna 3-2a according to the reception level of the standing line response signal 7.
  • the antenna control device 4 performs data transmission using the distributed antenna 3-1a and the distributed antenna 3-2a.
  • FIG. 5 is a flowchart showing a process flow of the antenna control apparatus according to the first embodiment.
  • the antenna control device 4 transmits a standing line confirmation signal 6a via each of the distributed antennas at a predetermined timing (step S101).
  • the antenna control device 4 determines whether the mobile station 2 has been detected based on the presence / absence of reception of the standing line response signal 7 transmitted from the mobile station 2 as a response to the standing line confirmation signal 6a (step S102). For example, the antenna control device 4 determines that the mobile station 2 exists in the linear cell at the time when the reception of the standing line response signal 7 transmitted from the mobile station 2 is confirmed.
  • the antenna control device 4 detects a distributed antenna whose reception level of the standing line response signal 7 received by the distributed antenna is equal to or greater than a threshold (Ste S103).
  • the antenna control device 4 adjusts the transmission power of the distributed antenna according to the reception level of the on-line response signal 7 (step S104). Subsequently, the antenna control device 4 executes data transmission using the distributed antenna detected in step S103 (step S105), and returns to the determination in step S101.
  • step S102 when the antenna control device 4 does not detect the mobile station 2 as a result of the determination (step S102, No), the process returns to the determination in step S101.
  • the antenna control device 4 transmits the standing line confirmation signal 6a from each of the distributed antennas, and moves using the distributed antenna in which the reception level of the standing line response signal 7 transmitted from the mobile station 2 exceeds the threshold value. Data transmission with the station 2 is executed. That is, the antenna control device 4 can select a distributed antenna that contributes to data transmission with the mobile station 2 from the distributed antennas. For this reason, according to Embodiment 1, the number of antennas used for data transmission among a plurality of antennas constituting a linear cell can be reduced, and radio wave interference to neighboring communication areas using the same frequency can be reduced. According to the first embodiment, since the wireless communication system includes the linear cell, the number of antennas is reduced to reduce the system weight, and the number of antennas that perform data transmission is reduced. The amount can be reduced.
  • FIG. 6 is a diagram for explaining radio wave interference between linear cells.
  • a radio communication system having a multi-linear cell configuration is a so-called overreach in which a signal radiated from one cell leaks to the other cell due to the presence of a plurality of linear cells that transmit signals using the same frequency. Causes an interfered cell.
  • the antenna control apparatus 4 adjusts the transmission power of the distributed antenna so that the higher the reception level of the standing line response signal 7 is, the lower the transmission power is. The transmission power of the distributed antenna 3-1a closest to can be reduced. For this reason, the antenna control device 4 can reduce the influence on the interfered cell.
  • data transmission with the mobile station 2 is performed using the distributed antenna in which the reception level of the standing line response signal 7 transmitted from the mobile station 2 exceeds the threshold.
  • data transmission may be performed using a distributed antenna whose reception level of the standing line response signal 7 exceeds a threshold and at least one of a plurality of other distributed antennas installed in the vicinity of the distributed antenna.
  • the antenna control device 4 for example, when the reception level of the distributed antenna 3-2a exceeds a threshold value, the distributed antenna 3-2a and the distributed antenna installed in the vicinity of the distributed antenna 3-2a.
  • Data transmission with the mobile station 2 can be executed using at least one of the 3-1a and the distributed antenna 3-3a.
  • the distributed antenna installed near the distributed antenna whose reception level of the standing line response signal 7 exceeds the threshold may be a distributed antenna installed adjacent to the distributed antenna whose reception level exceeds the threshold.
  • the distributed antenna installed in the vicinity of the distributed antenna whose reception level of the standing line response signal 7 exceeds the threshold value may be a distributed antenna installed within a certain distance from the distributed antenna.
  • FIG. 7 is a diagram illustrating a configuration example of a wireless communication system according to the second embodiment.
  • the radio communication system according to Embodiment 2 includes distributed antennas 3-1a,..., 3-Na, distributed antennas 3-1b,.
  • a device 4a and an antenna control device 4b are provided.
  • the distributed antennas 3-1b,..., 3-Nb having directivity in a specific direction are installed so that the sensitivity direction is opposite to that of the distributed antennas 3-1, a,. .
  • the antenna control device 4a controls signal transmission / reception performed via each of the distributed antennas 3-1a,..., 3-Na.
  • the antenna control device 4b controls signal transmission / reception performed via each of the distributed antennas 3-1b,..., 3-Nb.
  • the antenna control device 4a and the antenna control device 4b execute processing similar to the processing described in the first embodiment. That is, the antenna control device 4a and the antenna control device 4b each independently detect the mobile station 2 and select an antenna to be used for data transmission.
  • a plurality of directional distributed antennas are grouped for each sensitivity direction, and the antenna control device 4a and the antenna control device 4b execute the same processing as in the first embodiment for the groups that they are responsible for. .
  • the same effect as in the first embodiment that is, the number of antennas used for data transmission is reduced, and the same frequency
  • the effect of reducing the radio wave interference to the nearby communication area using can be exhibited.
  • the communication probability can be increased by installing the distributed antennas having different sensitivity directions.
  • Embodiment 3 FIG. In the following third embodiment, processing of an antenna control device different from that of the first embodiment will be described.
  • the antenna control device 4 according to the third embodiment is different from the first embodiment in the points described below.
  • the antenna control unit 41 sends an on-line confirmation signal 6a for confirming whether the mobile station 2 exists in the linear cell, and transmits each of the distributed antennas installed at both ends of the linear cell. And periodically transmitting to start detection of the mobile station 2.
  • the antenna control unit 41 detects the presence check signal 6a and the presence check signal 6a each time the first antenna whose reception level of the presence response signal 7 exceeds the threshold is detected as follows. Control the antenna that performs data transmission. First, the antenna control unit 41 uses the first antenna and the second antenna installed adjacent to the first antenna on the moving direction side of the mobile station 2 to transmit the presence line confirmation signal 6a and the data signal. The transmission of 6b is executed. Subsequently, when there is a third antenna installed adjacent to the first antenna on the side opposite to the moving direction of the mobile station 2, the antenna control unit 41 is the end antenna.
  • the antenna control unit 41 is an end antenna.
  • the transmission of the data signal 6b is stopped among the transmission of the on-line confirmation signal 6a and the transmission of the data signal 6b which are being executed through the third antenna.
  • the moving direction described above corresponds to a direction from the antenna side where the standing line response signal 7 is received toward the antenna side where the standing line response signal 7 is not received.
  • FIG. 8 is a flowchart showing a process flow of the antenna control apparatus according to the third embodiment.
  • FIG. 9 is a diagram illustrating an outline of processing of the antenna control apparatus according to the third embodiment.
  • cell corresponds to a linear cell.
  • antenna corresponds to the above-described distributed antenna.
  • the antenna control device 4 transmits the presence line confirmation signal 6a using the antennas 3-1a and the antenna 3-Na installed at both ends of the cell. Then, detection of the mobile station 2 is started.
  • the antenna control device 4 performs the same processing in either case when the mobile station 2 is detected on the side where the antenna 3-1a is installed or when the mobile station is detected on the side where the antenna 3-Na is installed. Execute. Therefore, hereinafter, as an example of processing, a case where the mobile station 2 is detected on the side where the antenna 3-1a is installed will be described.
  • the antenna control device 4 determines whether or not the reception level of the standing line response signal 7 received by the antenna 3-1a is equal to or higher than the threshold value (step S201).
  • the antenna control device 4 repeats the determination when the reception level of the on-line response signal 7 received by the antenna 3-1a is not equal to or higher than the threshold value (No in step S201).
  • step S201 when the reception level of the on-line response signal 7 received by the antenna 3-1a is equal to or higher than the threshold value (step S201, Yes), for example, as shown in step S22 of FIG. Then, transmission of the data signal 6b is started using the antenna 3-1a and the antenna 3-2a adjacent to the antenna 3-1a (step S202). Further, in conjunction with the start of transmission of the data signal 6b, the antenna control device 4 starts transmission of the presence line confirmation signal 6a from the antenna 3-2a (step S203).
  • the antenna control device 4 determines whether or not the reception level of the on-line response signal 7 received by the antenna 3-2a is equal to or higher than the threshold (step S204).
  • the antenna control device 4 repeats the determination when the reception level of the standing line response signal 7 received by the antenna 3-2a is not equal to or higher than the threshold value (No in step S204).
  • step S204 when the reception level of the on-line response signal 7 received by the antenna 3-2a is equal to or higher than the threshold (Yes in step S204), for example, as shown in step S23 of FIG.
  • the antenna 3-1a switches to transmission of the presence line confirmation signal 6a, and starts transmission of the data signal 6b using the antenna 3-3a adjacent to the antenna 3-2a (step S205). That is, the antenna control device 4 stops only the transmission of the data signal 6b among the transmissions of the on-line confirmation signal 6a and the data signal 6b that are being executed through the antenna 3-1a. Further, in conjunction with the start of transmission of the data signal 6b, the antenna control device 4 starts transmission of the presence line confirmation signal 6a also from the antenna 3-3a (step S206).
  • the antenna control device 4 determines whether or not the reception level of the on-line response signal 7 received by the antenna 3-3a is equal to or higher than the threshold (step S207).
  • the antenna control device 4 repeats the determination when the reception level of the on-line response signal 7 received by the antenna 3-3a is not equal to or higher than the threshold as a result of the determination (No in step S207).
  • step S207 when the reception level of the standing line response signal 7 received by the antenna 3-3a is equal to or higher than the threshold value (Yes in step S207), for example, as shown in step S24 of FIG. Then, the transmission of all signals (the on-line confirmation signal 6a and the data signal 6b) at the antenna 3-2a is stopped, and the transmission of the data signal 6b is started using the antenna 3-4a adjacent to the antenna 3-3a ( Step S208). Further, in conjunction with the start of transmission of the data signal 6b, the antenna control device 4 starts transmission of the presence line confirmation signal 6a from the antenna 3-4a (step S209).
  • the antenna control device 4 performs the same processing procedure as the processing procedure from step S208 to step S210 for each of the other antennas other than the antennas described above. Executed.
  • the antenna control device 4 determines whether the reception level of the on-line response signal 7 received by the antenna 3-Na is equal to or higher than the threshold (step S210).
  • the antenna control device 4 repeats the determination when the reception level of the on-line response signal 7 received by the antenna 3-Na is not equal to or higher than the threshold value (No in step S210).
  • step S210 when the reception level of the standing line response signal 7 received by the antenna 3-Na is equal to or higher than the threshold value as a result of the determination (Yes in step S210), the antenna control device 4 Transmission of all signals from all antennas other than 3-1a and antenna 3-Na is stopped (step S211). That is, the antenna control device 4 stops transmission of the on-line confirmation signal 6a and the data signal 6b that are being executed through all the antennas other than the antenna 3-1a and the antenna 3-Na.
  • the antenna control device 4 determines whether or not the reception level of the on-line response signal 7 received by the antenna 3-Na is less than the threshold value (step S212).
  • the antenna control device 4 repeats the determination when the reception level of the standing line response signal 7 received by the antenna 3-Na is not less than the threshold as a result of the determination (No in step S212).
  • the antenna control device 4 transmits the data signal 6b from the antenna 3-Na. Is stopped (step S213), and the process returns to the determination in step S201.
  • the antenna control apparatus 4 according to Embodiment 3 limits the distributed antennas that transmit the standing line confirmation signal 6a to only the distributed antennas installed at both ends of the linear cell until the mobile station 2 is detected. After the mobile station 2 is detected, the antenna control apparatus 4 according to the third embodiment adds the distributed antenna that transmits the standing line confirmation signal 6a to the distributed antennas installed at both ends of the linear cell, and It is limited to a distributed antenna whose reception level is equal to or higher than a threshold and a distributed antenna installed on the moving direction side of the mobile station 2 among adjacent antennas of the distributed antenna.
  • the antenna control apparatus 4 moves the distributed antenna that transmits the data signal 6b among the distributed antennas whose reception level of the standing line response signal 7 is equal to or higher than the threshold and the distributed antennas adjacent to the distributed antenna. It is limited to the distributed antenna installed on the moving direction side of the station 2. For this reason, according to the third embodiment, since the distributed antennas for transmitting signals are further limited according to the positional relationship between the mobile station 2 and the distributed antennas, radio wave interference to neighboring communication areas using the same frequency is prevented. Further reduction can be achieved. Further, according to the third embodiment, since data transmission to and from the mobile station 2 is always executed by a plurality of distributed antennas, it is possible to prevent deterioration in communication quality.
  • the antenna control device 4 may execute the above-described processing (see FIGS. 8 and 9) for each group, for example, for a plurality of distributed antennas grouped for each sensitivity direction shown in FIG.
  • the antenna control device 4 uses the distributed antennas installed at both ends of the linear cell as the distributed antenna that transmits the standing line confirmation signal 6a until the mobile station 2 is detected.
  • the present invention is not limited to this example.
  • the presence line confirmation is performed only from the antenna on the side where the mobile station 2 enters the linear cell.
  • the signal 6a may be transmitted. That is, when the moving direction of the mobile station 2 is limited in advance, radio interference can be further reduced by further limiting the distributed antennas that transmit the standing line confirmation signal 6a.
  • FIG. 10 is a diagram showing a modification of the linear cell constituting the wireless communication system.
  • 10 includes a base station 1, a plurality of distributed antennas 3-1a,..., 3-Na protruding from the base station 1 along one path,
  • the antenna control device 4 includes the distributed antennas 3-1c,..., 3-Mc protruding from the base station 1 along the other path that exchanges the path.
  • FIG. 10 even when linear cells are formed along a branching path, the same processing as in each of the above embodiments can be applied.
  • FIG. 11 is a diagram illustrating a hardware configuration example of the antenna control devices 4, 4a, and 4b according to the first to third embodiments.
  • the processing by the antenna control device 4 described in the first to third embodiments can be realized by the computer 100 shown in FIG.
  • the computer 100 includes, for example, a processor 101, a RAM (Random Access Memory) 102, a ROM (Read Only Memory) 103, an input interface (I / F) 104, an output interface (I / F) 105, and a communication interface (I / F). 106, bus 107, and the like. Each piece of hardware is connected via a bus 107.
  • the RAM 102 is a readable / writable memory device.
  • a semiconductor memory such as SRAM (Static RAM) or DRAM (Dynamic RAM), or a flash memory even if not a RAM is used.
  • the ROM 103 stores a program that realizes a function provided by the antenna control unit 41 included in the antenna control device 4 and a function corresponding to the power adjustment unit 42 included in the antenna control device 4.
  • the ROM 103 includes a PROM (Programmable ROM) and the like.
  • the input interface 104 is connected to the antennas 300a to 300n via the cable 50.
  • the input interface 104 is a circuit that transmits an input signal input from the antennas 300a,.
  • the output interface 105 is connected to the antennas 300a,.
  • the output interface 105 is a circuit that causes the antennas 300a,...
  • the communication interface 106 is a circuit that controls communication performed with the base station 200 via the network 70.
  • the communication interface 106 is, for example, a network interface card (NIC: NetworkK Interface Card).
  • the input interface 104 and the output interface 105 may be an integrated unit.
  • the base station 200 corresponds to, for example, the base station 1 illustrated in FIGS. 1, 4, 6, 7, 9, and 10.
  • the antennas 300a,..., And the antenna 300n correspond to, for example, the antennas 3-1a,..., And the antenna 3-Na shown in FIGS. 1, 4, 6, 7, 9, and 10.
  • the processor 101 reads out a program stored in the ROM 103, expands it in the RAM 102, and executes instructions included in the program expanded in the RAM 102.
  • the antenna control device 4 operates according to the execution result of the command included in the program, the processing corresponding to the function provided by the antenna control unit 41 and the processing corresponding to the function provided by the power adjustment unit 42 are realized. Is done.
  • the processor 101 executes instructions, the RAM 102 is used as a work area for the processor 101.
  • the processor 101 is limited to an example that realizes processing corresponding to the antenna control unit 41 and the power adjustment unit 42 included in the antenna control device 4 by reading and executing a program stored in the ROM 103.
  • a plurality of processing circuits for realizing the function provided by the antenna control unit 41 may cooperate to implement processing corresponding to the function provided by the antenna control unit 41.
  • a plurality of processing circuits for realizing the function provided by the power adjustment unit 42 may cooperate to implement processing corresponding to the function provided by the power adjustment unit 42.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Dans un système de communications sans fil comprenant une pluralité de cellules linéaires formées en installant une pluralité d'antennes le long d'un trajet prédéterminé, un appareil de commande d'antenne (4) commande la pluralité d'antennes, qui transmettent un signal généré par une station de base à une station mobile se déplaçant le long du trajet, et reçoivent le signal de la station mobile. L'appareil de commande d'antenne (4) comprend une unité de commande d'antenne (41) qui : transmet périodiquement, via la pluralité d'antennes, un premier signal pour confirmer si la station mobile est présente ou non dans les cellules linéaires ; détecte la station mobile présente dans les cellules linéaire d'après la présence ou l'absence de réception d'un second signal qui est un signal de réponse au premier signal ; et exécute le transfert de données à la station mobile, et depuis celle-ci, au moyen d'une antenne sélectionnée sur la base d'un niveau de réception du second signal.
PCT/JP2016/063070 2015-06-22 2016-04-26 Appareil de commande d'antenne Ceased WO2016208270A1 (fr)

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JP2017524708A JP6351846B2 (ja) 2015-06-22 2016-04-26 アンテナ制御装置

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JP2015-124417 2015-06-22
JP2015124417 2015-06-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023286187A1 (fr) * 2021-07-14 2023-01-19 日本電信電話株式会社 Procédé de commande de communication et dispositif de commande de communication

Citations (4)

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