WO2014192620A1

WO2014192620A1 - Radio base station apparatus, radio communication system, radio communication method, and program thereof

Info

Publication number: WO2014192620A1
Application number: PCT/JP2014/063531
Authority: WO
Inventors: 茂天野
Original assignee: 日本電気株式会社
Priority date: 2013-05-27
Filing date: 2014-05-22
Publication date: 2014-12-04
Also published as: JPWO2014192620A1

Abstract

[Problem] To provide a radio base station apparatus, a radio communication system, a radio communication method and a program thereof whereby radio communications, which are related to information transmitted/received by a radio terminal carried in a mobile body, can be effectively achieved. [Solution] A radio base station apparatus (40), which performs communications in accordance with information received from a radio terminal (90) via a radio relay apparatus (10) provided in a mobile body, is characterized by comprising: a control unit (50) that performs data communications with a communication network (100); a plurality of radio communication units (60(1) to 60(n)) each of which receives the information from the radio terminal (90) and executes radio communications; and a selection unit (70) that selects any one of the radio communication units (60(1) to 60(n)) according to a rule established in advance and that transfers, to the control unit (50), the information received by the selected radio communication unit (any one of 60(1) to 60(n)) from the radio terminal (90).

Description

Radio base station apparatus, radio communication system, radio communication method, and program thereof

The present invention relates to a radio communication technology, and more particularly, to a radio base station apparatus, a radio communication system, a radio communication method, and a program for executing radio communication related to information transmitted and received by a mobile terminal.

In order to cope with the increase in communication volume accompanying the spread of mobile terminals and to increase user throughput, mobile communication systems are changing from the current LTE (Long Term Term Evolution) system to the standard of fourth generation (4G) cellular phones. Migration to LTE-Advanced, which is one of the standards, and to Future Radio Access is considered.

LTE-Advanced has been studied for standardization by 3GPP Rel.10 and Rel.11 (releases 10 and 11), and a typical method is a large and small cell called HetNet (Heterogeneous Network). Inter-base-station / cell-coordination called CoMP (Coordinated Multi Point transmission: Coordinated Multi-Point Cooperative Transmission Technology) The technology is known.

In the hot spot (registered trademark) where terminal users are concentrated, it corresponds to the traffic increased by the small cell base station and femtocell base station of the small cell instead of the macro base station of the large cell. A method of realizing high throughput by antenna beam forming (technology for reducing radio wave interference) has been devised.

For example, as shown in FIG. 5, in a radio base station apparatus 800 of a general mobile communication system in which a radio unit (RE) 200 and a control unit (REC) 500 are separated, the radio unit 200, the control unit 500, However, they are usually connected by optical fibers, thereby realizing high-speed communication.

Standardized specifications such as CPRI (Common Public Radio Interface) and OBSAI (Open Base Station Architecture) are defined for the interface between the radio unit 200 and the control unit 500, and the communication speed is about 1.2 Gbps. It is about several times this.

Further, in order to realize an improvement in throughput even in a situation where traffic increases, a radio base station apparatus has a configuration of a macro base station apparatus with a high output and a wide coverage, and the macro base station apparatus and a small cell with a narrow coverage It is gradually shifted to a system configuration in which a base station is combined with an overlay.

Furthermore, as a technique related to such wireless communication, for example, the following contents (Patent Document 1 or 2) are known.

In Patent Document 1, a position of a PHS terminal owned by a passenger is estimated at a relay station installed in a train, and QoS (Quality of) related to wireless communication with the PHS terminal according to the estimated position is disclosed. The technical content of ensuring stable communication quality in a wireless communication system by switching the standard of (Service) and handover (base station switching processing) is disclosed.

Further, Patent Document 2 discloses the technical contents related to broadband wireless communication performed between a terminal device possessed by a passenger inside an aircraft equipped with a wireless relay station and a terrestrial communication network. Specifically, the base station antenna of the base station connected to the ground communication network is provided with a function for generating and transmitting a beam for capturing or tracking the aircraft, thereby grasping the positional relationship with the aircraft. Thus, there is shown a broadband wireless communication system in which continuous broadband wireless transmission between the terminal device and the terrestrial communication network is realized within the coverage of the base station.

JP 2012-143005 A JP 2005-159448 A

However, as in the case where the user of a wireless terminal (UE: User Equipment) is a train passenger or the like, it is an environment in which the user concentrates (hot spot environment) and the connected base station is switched in a short time. Below, in order to realize high throughput, there is a disadvantage that the technical difficulty level becomes high.

In addition, in order to adopt technologies such as multi-user MIMO to achieve high throughput, it is necessary to incorporate new technologies not only on the wireless base station side, which is an infrastructure, but also on the wireless terminal side. In other words, there is a problem that it is necessary to update / renew a wireless terminal possessed by an arbitrary user.

Furthermore, in the wireless communication system disclosed in Patent Literature 1, by adding a functional configuration in a repeater installed in a train, seamless handover is realized while maintaining wireless communication. There is an inconvenience that a repeater or the like installed in a mobile body cannot be used effectively. Further, Patent Document 2 discloses a technique for significantly switching wireless connection between an aircraft and a plurality of base stations. However, there is no technical content for further improving the connection status in a base station such as wide coverage. Not disclosed.

(Object of invention)
The present invention improves the inconveniences of the related art, and in particular, a radio base station apparatus, a radio communication system, and a radio that effectively realize radio communication concerning information transmitted and received by a mobile terminal carried in a mobile body. The purpose is to provide a communication method and a program thereof.

In order to achieve the above object, a radio base station apparatus according to the present invention is a radio base station apparatus that performs communication processing according to information received from a radio terminal via a radio relay apparatus installed in a mobile body. A plurality of wireless communication units that receive information from the wireless terminal and execute a wireless communication process, and select one of the plurality of wireless communication units according to a preset criterion, and the selection And a selection processing unit that transmits information from the wireless terminal received by the wireless communication unit to an external communication network.

Further, in the wireless communication system according to the present invention, a wireless relay device that is equipped in a mobile body and relays information related to communication with a wireless terminal, and according to information received from the wireless terminal via the wireless relay device. And a radio base station apparatus that performs the communication processing.

Furthermore, in the wireless communication method according to the present invention, the wireless communication method includes a plurality of wireless communication units that receive information from the wireless terminal and perform wireless communication processing via the wireless relay device installed in the mobile body, and from the wireless terminal. In the radio base station apparatus that executes communication processing according to information, the information from the radio terminal is received by the plurality of radio communication units, and any one of the radio communication units is separately provided The selection processing unit is selected according to a preset criterion, and the selection processing unit transmits information from the wireless terminal received by the selected wireless communication unit to an external communication network. To do.

The wireless communication control program according to the present invention includes a plurality of wireless communication units that receive information from a wireless terminal and perform wireless communication processing via a wireless relay device installed in a mobile body, and from the wireless terminal. Any one of the information receiving means for receiving the information from the wireless terminal by the plurality of wireless communication units, and one of the wireless communication units. To the radio base station apparatus as selection processing means for transmitting information from the radio communication unit received by the selected radio communication unit to an external communication network. A computer provided in advance is made to function.

According to the present invention, in particular, it is possible to provide a radio base station apparatus, a radio communication system, a radio communication method, and a program thereof that can effectively realize radio communication related to information transmitted and received by a mobile terminal carried in a mobile body. Is possible.

It is a block diagram which shows the structure of the radio base station apparatus and radio | wireless communications system concerning embodiment of this invention. It is a block diagram which shows a mode that the radio | wireless relay apparatus in the radio | wireless communications system disclosed in FIG. 1 was equipped in the train as a moving body. 3 is a flowchart illustrating an operation when an uplink is received from a radio terminal in the radio base station apparatus and radio communication system disclosed in FIG. 1. 3 is a flowchart illustrating an operation when data transmitted from the communication network side is received in the radio base station apparatus and the radio communication system disclosed in FIG. 1. It is a block diagram which shows the structure in the existing general radio base station apparatus.

Embodiment
Embodiments of a radio base station apparatus and a radio communication system according to the present invention will be described with reference to FIGS.

(Overall configuration)
As shown in FIG. 1, a wireless communication system 80 includes a wireless relay device 10 that relays information related to communication with a wireless terminal (UE) 90 and information received from the wireless terminal 90 via the wireless relay device 10. Alternatively, a radio base station apparatus 40 that performs communication processing according to data acquired from the external communication network (network) 100 side is provided.
The wireless relay device 10 in this embodiment is installed in a moving body (not shown).

Here, as the wireless terminal 90, various mobile terminals such as a mobile phone, a smart phone, a small notebook personal computer, a PDA (Personal Digital Assistants), and a portable game machine are assumed.
In addition, the communication network 100 widely includes the Internet, a telephone exchange network, a business communication network, and the like, and the mobile body (not shown) includes a train, a car, a ship, an aircraft, and the like.

The wireless relay device 10 performs a wireless communication process related to information transmitted / received to / from the wireless terminal 90 and a relay that executes a wireless communication process related to information transmitted / received to / from the wireless base station device 40. Wireless communication unit 30.

The wireless relay device 10 has a configuration for effectively relaying wireless communication performed between the wireless terminal 90 and the wireless base station device 40, that is, information transmitted from the wireless terminal 90 is transmitted by the wireless unit 20. The received wireless relay device 10 is configured to transmit the information by the relay wireless communication unit 30.

The radio base station apparatus 40 includes a control unit 50 that performs data communication processing with the communication network 100, and a plurality of units that receive information transmitted from the radio terminal 90 via the radio relay apparatus 10 and perform radio communication processing. The wireless communication units 60 (1) to 60 (1) to (n: any natural number) and one of the plurality of wireless communication units 60 (1) to (n) are selected according to a preset criterion, And a selection processing unit (switching processing unit) 70 that delivers the information received by the selected wireless communication unit to the control unit 50.

The selection processing unit 70 specifies the wireless communication unit having the highest received electric field strength by measuring the received electric field strength of each of the wireless communication units 60 (1) to (n) and comparing the measurement results. The electric field strength specifying means 70A for executing the above selection is provided.
In the present embodiment, a standard for specifying the wireless communication unit 60 (any one of 1 to n) having the highest received electric field strength is adopted as the preset standard.

That is, the selection processing unit 70 specifies the wireless communication unit 60 (any one of 1 to n) having the highest received electric field strength when performing the above selection, and also specifies any one of the specified wireless communication units 60 (1 to n). The information received from the wireless terminal 90 is transmitted to the external communication network 100 via the control unit 50.

The selection processing unit 70 transmits the data acquired from the communication network 100 via the control unit 50 to the radio communication unit 60 (any one of 1 to n) selected by the electric field strength specifying means 70A. The composition is taken.

That is, the selection processing unit 70 measures and compares the received electric field strength of each of the wireless communication units 60 (1) to (n) as necessary, so that the wireless communication unit 60 (1 1 to n), and the selected wireless communication unit 60 (any one of 1 to n) has acquired information or transmitted data immediately before that one of the wireless communication units 60 (1 to n). ), The plurality of wireless communication units 60 (1) to 60 (n) as information acquisition destinations or data transmission destinations are switched, and the respective processes are executed.

Unlike a radio base station apparatus constituting a general mobile communication system so far, in the radio communication system 80 in the present embodiment, an interface between the radio unit (RE) 20 and the control unit (REC) 50 is Between the relay radio communication unit 30 connected to the radio unit 20 and a plurality of radio communication units 60 (1) to (n) connected to the control unit (REC) 50 via the selection processing unit 70. Since the wireless configuration is employed, it is possible to easily implement the wireless relay device 10 including the wireless unit 20 on the vehicle.

That is, if the radio base station apparatus 40 according to the present embodiment is adopted in a mobile communication system or the like, even if the radio terminal 90 possessed by the user existing inside the mobile object moves at a high speed with the mobile object. In particular, a plurality of wireless communication units 60 (1) to (n) and a selection processing unit 70 for selecting a wireless communication unit 60 for data transmission or reception (any one of 1 to n) from these are effective. Therefore, wireless communication equivalent to that in a stationary state can be realized.

Next, with reference to FIG. 2, the contents of the configuration when the wireless relay device 10 configuring the wireless communication system 80 is mounted on a moving body will be described.

Here, it is assumed that a train 110 is employed as the moving body, and the train 110 is equipped with the wireless relay device 10 (the wireless unit 20 and the relay wireless communication unit 30).
Specifically, as shown in FIG. 2, the radio unit 20 is installed near the indoor ceiling of a train 110 that is a moving body, and the relay radio communication unit 30 connected to the radio unit 20 is connected to the outdoor ceiling of the train 110. Assume a state where it is installed in the area.
On the other hand, it is assumed that the plurality of radio communication units 60 (1) to (n) are included in the radio base station apparatus 40 and are installed in a fixed environment on the ground.

Further, in FIG. 2, the situation in which the wireless terminal 90 moves together with the movement of the train 110 as a moving body is clearly shown by showing a state where the user 120 having the wireless terminal 90 gets on the train 110. Here, for convenience, the wireless terminal 90 having a smartphone-like appearance is described. However, as described above, even if a mobile phone, a small notebook personal computer, a PDA, a portable game machine, or the like is adopted as the wireless terminal 90, the same effect can be obtained.

In communication between the relay wireless communication unit 30 and the plurality of wireless communication units 60 (1) to 60 (n), for example, a configuration for performing high-speed communication using a technique such as antenna beam forming, millimeter-wave broadband communication, or the like. By adopting the configuration, the capacity required for the communication is ensured.

Uplink signals (uplinks) transmitted from the relay wireless communication unit 30 to the plurality of wireless communication units 60 (1) to (n) are received from the wireless communication units 60 (1) to (n) that have received the uplink signals. It is configured to be taken into one selection processing unit 70.

The selection processing unit 70 that has acquired each uplink signal measures the reception electric field strength of each of the radio communication units 60 (1) to (n) and compares the respective measurement results to obtain a specific radio signal having the highest reception electric field strength. The communication unit 60 (any one of 1 to n) is selected.

The selection processing unit 70 selects information received by the selected wireless communication unit 60 (any one of 1 to n) and performs timing adjustment such as delay adjustment, and then transmits the information to the control unit 50. It is configured to pass on. When performing the timing adjustment, the selection processing unit 70 temporarily stores information from the wireless terminal 90 in an internal memory or the like (not shown), and then performs control at a significant timing in accordance with reference information provided in advance. The configuration of outputting to the unit 50 is adopted.

Downlink signals (downlinks) transmitted from the plurality of radio communication units 60 (1) to (n) to the relay radio communication unit 30 are received field strengths (uplinks) selected by the selection processing unit 70 in the same manner as described above. It is configured to transmit only from a specific wireless communication unit 60 (any one of 1 to n) having a high (reception electric field intensity).

That is, the radio base station apparatus 40 transmits the data received from the communication network 100 side only from the specific radio communication unit 60 (any one of 1 to n) selected as described above, via the radio relay apparatus 10. The transmission is transmitted to the wireless terminal 90.
Other constituent members are the same as those described with reference to FIG.

(Description of operation)
Next, in the radio base station apparatus 40 and the radio communication system 80 shown in FIG. 1, the operation when information (uplink signal) from the radio terminal 90 is received will be described based on the flowchart shown in FIG.

Information transmitted from the wireless terminal 90 is received by the plurality of wireless communication units 60 (1) to 60 (n) via the wireless relay device 10 installed in the moving body (not shown) (FIG. 3: S301). .
That is, the wireless relay device 10 that has received the information transmitted from the wireless terminal 90 by the wireless unit 20 transmits this information to the wireless base station device 40 by the relay wireless communication unit 30, and thereby the wireless base station device 40 receives the information at a plurality of wireless communication units 60 (1) to (n) (FIG. 3: S301).

Next, the selection processing unit 70 measures the received electric field strength of each of the radio communication units 60 (1) to (n) and compares the measurement results (FIG. 3: S302), and the electric field strength specifying means 70A A specific wireless communication unit 60 (any one of 1 to n) having the highest received electric field strength is selected (FIG. 3: S303).

Subsequently, the information from the wireless terminal 90 received by the selected wireless communication unit 60 (any of 1 to n) is acquired by the selection processing unit 70 and transferred to the control unit 50, and the control that has received the information. The part 50 transmits this toward the communication network 100 (FIG. 3: S304).
That is, the radio base station apparatus 40 acquires information from the radio terminal 90 received by the radio communication unit 60 (any one of 1 to n) selected by the electric field strength specifying means 70A, and transmits this to the outside. (FIG. 3: S304).

Next, operations in the case of receiving data from the communication network 100 side in the radio base station apparatus 40 and the radio communication system 80 shown in FIG. 1 will be described based on the flowchart shown in FIG. Here, the data transmitted from the communication network 100 side includes data returned from the communication network 100 side in accordance with information transmitted from the wireless terminal 90.

The radio base station apparatus 40 receives data from the communication network 100 side at the control unit 50 and transfers it to the selection processing unit 70 (FIG. 4: S401).

Next, the selection processing unit 70 measures the received electric field strength (uplink received electric field strength) applied to the uplink signals of the radio communication units 60 (1) to (n) and compares the measurement results (FIG. 4: S402).

Subsequently, the selection processing unit 70 selects the specific wireless communication unit 60 (any one of 1 to n) having the highest received electric field strength (FIG. 4: S403), and the data received from the control unit 50 is The data is transmitted to the wireless relay device 10 via the selected specific wireless communication unit 60 (any one of 1 to n) (FIG. 4: S404).

That is, the data received from the control unit 50 is transferred only to the radio communication unit 60 (any one of 1 to n) selected by the selection processing unit 70 as described above, and the data is transmitted to the radio communication unit 60 (1 to n). Either of them transmits to the wireless relay device 10 (FIG. 4: S404).

The wireless relay device 10 transmits the data received from the specific wireless communication unit 60 (any one of 1 to n) to the wireless terminal 90 (FIG. 4: S405).

The execution contents of each process in each of the above steps S301 to S304 (FIG. 3) and each of steps S401 to S405 (FIG. 4) may be programmed, and this series of control programs may be realized by a computer. .

(Effects of the embodiment, etc.)
Unlike the existing general radio base station apparatus 800 in which the radio unit (RE) 200 and the control unit (REC) 500 are connected by wire as shown in FIG. In the communication system 80, since the interface between the radio unit (RE) 20 and the control unit (REC) 50, that is, the interface between the radio relay apparatus 10 and the radio base station apparatus 40 is wireless, the radio communication unit 80 The unit 20 can be suitably installed on the moving body.

In addition, since the radio unit 20 in the present embodiment is mounted on a mobile body, the radio terminal (UE) 90 existing on the mobile body is in an environment where the mobile body is moving at high speed. It is possible to communicate with the radio unit 20 in a fixed manner. That is, even in a situation where the moving body moves at a high speed, the radio terminal 90 that moves together with the moving body including the radio unit 20 does not need to perform handover, so that throughput can be improved.

Furthermore, the radio base station apparatus 40 having a plurality of radio communication units 60 (1) to 60 (n) and a selection processing unit (switching processing unit) 70 that selects and appropriately performs a switching process or the like is described above. As described above, since the wireless relay device 10 including the wireless unit 20 and the relay wireless communication unit 30 can be significantly linked, the high-speed movement of the wireless terminal 90 affects the information communication effect. be able to.

Therefore, if the wireless base station device 40 or the wireless communication system 80 is employed even when the mobile terminal moves at a high speed, such as when the wireless terminal is brought into the mobile body, the wireless terminal Can achieve high throughput in wireless communication equivalent to that in an environment where is in a stationary state. That is, according to the radio base station apparatus 40 or the radio communication system 80, it is possible to effectively realize radio communication related to information transmitted / received by a mobile terminal carried in a mobile body.

The embodiment described above is a preferred specific example in the radio base station apparatus, the radio communication system, the radio communication method, and the program thereof, and may have various technically preferable limitations. However, the technical scope of the present invention is not limited to these embodiments unless specifically described to limit the present invention.

The following is a summary of the main technical points of the above-described embodiment, but the present invention is not necessarily limited to this.

(Appendix 1)
A radio base station apparatus that performs communication processing according to information received from a radio terminal via a radio relay apparatus installed in a mobile body,
A plurality of wireless communication units for receiving information from the wireless terminal and executing wireless communication processing;
Selecting one of the plurality of wireless communication units according to a preset criterion and selecting the information received from the wireless terminal received by the selected wireless communication unit toward an external communication network And a processing unit.

(Appendix 2)
In the radio base station apparatus according to appendix 1,
The radio base station apparatus, wherein the selection processing unit includes an electric field strength specifying unit that specifies a radio communication unit having the highest received electric field strength when performing the selection.

(Appendix 3)
In the radio base station apparatus according to the

appendix

1 or 2,
The radio base station apparatus, wherein the selection processing unit has a function of transmitting data acquired from the external communication network side to the selected radio communication unit.

(Appendix 4)
A radio relay apparatus that is mounted on a mobile body and relays information related to communication with a radio terminal; a radio base station apparatus that performs communication processing according to information received from the radio terminal via the radio relay apparatus; A wireless communication system comprising:
A radio communication system comprising the radio base station apparatus according to claim 1 as the radio base station apparatus.

(Appendix 5)
In the wireless communication system according to Appendix 4,
The wireless relay device is
A wireless unit that performs wireless communication processing related to information transmitted to and received from the wireless terminal;
A wireless communication system, comprising: a wireless communication unit for relay that executes wireless communication processing related to information transmitted to and received from the wireless base station device.

(Appendix 6)
A radio base that has a plurality of radio communication units that receive information from a radio terminal and performs radio communication processing via a radio relay device installed in a mobile body, and that performs communication processing according to information from the radio terminal In the station equipment,
The information from the wireless terminal is received by the plurality of wireless communication units,
A selection processing unit equipped separately with any one of the wireless communication units is selected according to a preset criterion,
A wireless communication method, wherein the selection processing unit transmits information from the wireless terminal received by the selected wireless communication unit to an external communication network.

(Appendix 7)
In the wireless communication method according to appendix 6,
A wireless communication method characterized by identifying a wireless communication unit having the highest received electric field strength when performing the selection.

(Appendix 8)
A radio base that has a plurality of radio communication units that receive information from a radio terminal and performs radio communication processing via a radio relay device installed in a mobile body, and that performs communication processing according to information from the radio terminal In the station equipment,
Information receiving means for receiving information from the wireless terminal by the plurality of wireless communication units;
One of the wireless communication units is selected according to a preset criterion, and information from the wireless communication unit received by the selected wireless communication unit is transmitted to an external communication network. Selection processing means,
A wireless communication control program for causing a computer provided in advance in the wireless base station device to function.

(Appendix 9)
In the wireless communication control program according to appendix 8,
In performing the selection, electric field strength specifying means for specifying the wireless communication unit having the highest received electric field strength,
A wireless communication control program for causing the computer to function as:

This application claims priority based on Japanese Patent Application No. 2013-110599 filed on May 27, 2013, the entire disclosure of which is incorporated herein.

The present invention can be applied as a configuration of a mobile communication system according to a wireless communication technique, and can be significantly used particularly in a scene where communication is performed with a wireless terminal (mobile terminal) existing in the mobile body.

10 wireless relay device 20,200 wireless unit (RE)
30 radio communication unit for relay 40 radio base station device 50,500 control unit (REC)
60 (1) to (n) Wireless communication unit 70 Selection processing unit 70A Electric field strength specifying means 80 Wireless communication system 90 Wireless terminal 100 Communication network (network)
110 Train (mobile)
120 users 800 radio base station apparatus

Claims

A radio base station apparatus that performs communication processing according to information received from a radio terminal via a radio relay apparatus installed in a mobile body,
A plurality of wireless communication units for receiving information from the wireless terminal and executing wireless communication processing;
Selecting one of the plurality of wireless communication units according to a preset criterion and selecting the information received from the wireless terminal received by the selected wireless communication unit toward an external communication network And a processing unit.
In the radio base station apparatus according to claim 1,
The radio base station apparatus, wherein the selection processing unit includes an electric field strength specifying unit that specifies a radio communication unit having the highest received electric field strength when performing the selection.
In the radio base station apparatus according to claim 1 or 2,
The radio base station apparatus, wherein the selection processing unit has a function of transmitting data acquired from the external communication network side to the selected radio communication unit.
A radio relay apparatus that is mounted on a mobile body and relays information related to communication with a radio terminal; a radio base station apparatus that performs communication processing according to information received from the radio terminal via the radio relay apparatus; A wireless communication system comprising:
A radio communication system comprising the radio base station apparatus according to claim 1 as the radio base station apparatus.
The wireless communication system according to claim 4, wherein
The wireless relay device is
A wireless unit that performs wireless communication processing related to information transmitted to and received from the wireless terminal;
A wireless communication system, comprising: a wireless communication unit for relay that executes wireless communication processing related to information transmitted to and received from the wireless base station device.
A radio base that has a plurality of radio communication units that receive information from a radio terminal and performs radio communication processing via a radio relay device installed in a mobile body, and that performs communication processing according to information from the radio terminal In the station equipment,
The information from the wireless terminal is received by the plurality of wireless communication units,
A selection processing unit equipped separately with any one of the wireless communication units is selected according to a preset criterion,
A wireless communication method, wherein the selection processing unit transmits information from the wireless terminal received by the selected wireless communication unit to an external communication network.
The wireless communication method according to claim 6, wherein
A wireless communication method characterized by identifying a wireless communication unit having the highest received electric field strength when performing the selection.
A radio base that has a plurality of radio communication units that receive information from a radio terminal and performs radio communication processing via a radio relay device installed in a mobile body, and that performs communication processing according to information from the radio terminal In the station equipment,
Information receiving means for receiving information from the wireless terminal by the plurality of wireless communication units;
One of the wireless communication units is selected according to a preset criterion, and information from the wireless communication unit received by the selected wireless communication unit is transmitted to an external communication network. Selection processing means,
A wireless communication control program for causing a computer provided in advance in the wireless base station device to function.
In the wireless communication control program according to claim 8,
In performing the selection, electric field strength specifying means for specifying the wireless communication unit having the highest received electric field strength,
A wireless communication control program for causing the computer to function as: