JP7277170B2 - Portable radios and radio communication systems - Google Patents

Description

The present invention relates to testing of a radio environment between a mobile station and a base station that perform duplex radio communication.

There are various types of wireless communication systems with different communication schemes (modulation schemes and communication procedures). As an example, there is a train radio system that performs radio communication using the FDMA (Frequency Division Multiple Access) system, which is a type of duplex system that enables simultaneous radio transmission and reception. The FDMA system is a system in which one radio carrier corresponds to one radio channel.

FIG. 1 shows a schematic configuration of a train radio system. As shown in the figure, a typical train radio system comprises a command console 10, a line controller 20, a base station 30, and a mobile station (on-board station) 40. FIG.
The command console 10 is a terminal device on the upper side that issues communication commands to trains.
The line control device 20 is a central device that performs connection between the command console 10 and the base station 30, manages the position of the on-board station 40, and controls the overall communication.
The base station 30 is installed along the railroad track on which the train runs, and communicates with the on-board station 40 by a determined method, and communicates with the line control device 20 by a determined method. A plurality of base stations 30 are installed at certain intervals so as to provide a communication area that covers the train route as a whole.
The on-board station 40 is a device that communicates with the command console 10 via wireless communication with the base station 30 . The on-board station 40 is a type of terminal station, and is also called a mobile station because it is mounted on a train car and moves along with the running of the train. Although only one on-board station 40 is shown in FIG. 1, a plurality of on-board stations 40 exist in the system and are identified by unique identification information attached to each.

The radio channels used by the base station 30 and the on-board station 40 are different up and down, but they are paired as one channel. In FIG. 1, radio channel F1 is used in the upward direction from on-board station 40 to base station 30, and radio channel F2 is used in the downward direction from base station 30 to on-board station 40. In FIG.

Conventionally, from the viewpoint of operation control, prior to actual operation of the train radio system, a test was conducted to confirm whether or not the on-board station 40 could constantly communicate with the command console 10 by radio while the train was running. ing. For example, Patent Literature 1 discloses a method of detecting the state of wireless communication using a mobile station (vehicle station).

In order to conduct a communication test on a route, it is usually necessary to mount the on-board station 40 on the vehicle. Even if the on-board station 40 is not mounted on the vehicle and the communication test is performed by itself, the on-board station 40 is a large and heavy device that is assumed to be mounted on the vehicle. Since it is necessary to prepare a power supply to be supplied, it was difficult to conduct a communication test by itself. Here, by using a portable wireless device instead of the on-board station 40 for the communication test, it is conceivable to solve the problems of size, weight, and power supply. However, the FDMA portable radio usually requires an antenna duplexer for sharing the transmitting and receiving antennas, as shown in FIG.

FIG. 2 shows a configuration example of a portable radio equipped with an antenna duplexer.
The portable wireless device 50 shown in FIG. and an antenna duplexer 57 for sharing a transmitting/receiving antenna 58 between the transmitting section 55 and the receiving section 56 . The control device 52 is configured using hardware resources such as an arithmetic unit (CPU) 53 and a storage device (memory) 54 . The storage device 54 stores a program for controlling the operation of the portable wireless device 50. By executing this program with the arithmetic device 53, the operation according to a predetermined communication sequence is realized.

A duplexer is a device that gets larger and heavier as the frequency of the radio goes down. In the case of a frequency band of about 150 MHz used in a train radio system, the antenna duplexer becomes a device of size and weight unsuitable for portability. In order to solve this problem, it is conceivable to conduct a communication test using a portable radio without an antenna duplexer, that is, a simplex portable radio that does not perform simultaneous radio transmission and reception.

FIG. 3 shows a configuration example of a portable radio device without a duplexer.
The portable radio device 60 shown in FIG. and an antenna switch 67 for switching the use of the transmitting/receiving antenna 68 between the transmitting section 65 and the receiving section 66 . The control device 62 is configured using hardware resources such as an arithmetic unit (CPU) 63 and a storage device (memory) 64 . The storage device 64 stores a program for controlling the operation of the portable wireless device 60. By executing this program on the arithmetic device 63, the operation according to a predetermined communication sequence is realized.

JP 2011-124783 A

Train radio systems are generally designed in a duplex manner. For this reason, in a simplex portable radio device such as that shown in FIG. 3, a sequence (for example, a call sequences, etc.). Also, modifying an existing train radio system to accommodate simplex portable radios is undesirable due to the high cost of modification. On the other hand, the duplex type portable radio shown in FIG. unsuitable.

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional circumstances as described above. The purpose is to make it possible to implement it with a radio.

In order to achieve the above object, in the present invention, a portable radio device is configured as follows.
That is, a portable radio device according to the present invention is a simplex portable radio device used for testing a radio environment between a mobile station and a base station that perform duplex radio communication, transmitting a request signal corresponding to the operation to the base station in response to receiving an operation from a user of the portable wireless device to instruct transition from the first operation state to the second operation state; After transmitting the request signal, the operation state is shifted to the second operation state without waiting for reception of a response signal transmitted from the base station in response to the request signal.

With such a configuration, a simplex portable radio can be used with a sequence designed assuming a duplex system (a response signal is transmitted from the base station side in response to a request signal transmitted from the portable radio). sequence) can also be supported. Also, the portable radio device according to the present invention operates differently from the original sequence, so it is not suitable for actual operation, but it is used for testing the radio environment between the mobile station and the base station. Therefore, it is not a problem. Therefore, according to the present invention, it is possible to test the radio environment between a mobile station and a base station that perform duplex radio communication with a simplex portable radio.

Here, as one configuration example, in the portable wireless device according to the present invention, when the first operating state is the idle state and the second operating state is the communicating state, in the idle state, In response to accepting the operation, a call request signal corresponding to the call operation is transmitted to the base station side, and after the transmission of the call request signal, the base station side transmits the call request signal in response to the call request signal. A configuration may be adopted in which the transition to the communicating state is made without waiting for the reception of the outgoing call response signal.

Further, as one configuration example, the portable wireless device according to the present invention is configured such that, when the first operating state is the communicating state and the second operating state is the transmitting state, the communicating state a transmission request signal corresponding to the transmission operation is transmitted to the base station side in response to reception of the transmission operation, and after transmission of the transmission request signal, the transmission request signal is transmitted from the base station side to the transmission request signal. A configuration may be adopted in which the transition to the transmitting state is made without waiting for the reception of the transmission response signal transmitted in response to the request signal.

Further, as one configuration example, the portable wireless device according to the present invention disconnects in the communicating state when the first operating state is the communicating state and the second operating state is the idle state. In response to accepting the operation, a disconnection request signal corresponding to the disconnection operation is transmitted to the base station side, and after transmission of the disconnection request signal, the base station side transmits the disconnection request signal in response to the disconnection request signal. It may be configured to shift to the idle state without waiting for reception of the disconnection notification signal.

According to the present invention, it is possible to test the radio environment between a mobile station and a base station that perform duplex radio communication with a simplex portable radio.

1 is a diagram showing a schematic configuration of a train radio system; FIG. 1 is a diagram showing a configuration example of a portable wireless device having an antenna duplexer; FIG. FIG. 2 is a diagram showing a configuration example of a portable wireless device without an antenna duplexer; FIG. 10 is a diagram showing a transmission sequence in actual operation; FIG. 10 is a diagram showing a call reception sequence in actual operation; FIG. 10 is a diagram showing a speech transmission sequence in actual operation; FIG. 10 is a diagram showing a disconnection sequence in actual operation; FIG. 10 is a diagram showing a disconnection notification sequence in actual operation; FIG. 10 is a diagram showing a cut-in-transmission notification sequence in actual operation; FIG. 10 is a diagram showing a transmission sequence for testing; FIG. 10 is a diagram showing a test transmission sequence; FIG. 10 is a diagram showing a test disconnection sequence; FIG. 10 is a diagram showing a disconnect notification sequence during transmission for testing;

An embodiment of the present invention will be described with reference to the drawings. In the following, the simplex portable radio 60 shown in FIG. 3 is used to test the radio environment between the on-board station 40 and the base station 30 in the duplex train radio system shown in FIG. A case of using them will be described as an example. It should be noted that the term "portable device" in the following description indicates a simplex portable radio device, and is omitted for the sake of simplicity of description.

The radio environment test is performed by, for example, having a worker carry the portable device 60 while walking on the railroad track, perform test communication with the command console 10, and measure the state of the radio communication at that time. done. As an example, the portable device 60 measures the received electric field strength of the signal received from the base station 30 during test communication, and records the result in a recording medium built in or connected to the portable device 60.

Here, the portable device 60 normally has a receiver section 66 and a transmitting/receiving antenna 68 connected by an antenna switch 67 so that signals from the base station 30 can be received. Then, when it becomes necessary to transmit a signal from itself (when there is a call operation or a transmission operation), the transmission unit 65 and the transmission/reception antenna 68 are temporarily connected by the antenna switch 67. It is configured. However, the portable device 60 cannot support some of the sequences assuming the duplex system. Examples of such sequences include the following transmission sequence, transmission sequence, disconnection sequence, disconnection notification sequence during transmission, and the like.

(Regarding outgoing sequence)
Even if the portable device 60 immediately switches the connection of the transmitting/receiving antenna 68 to receive the transmission response signal after transmitting the transmission request signal in response to the transmission operation by the user, the switching may not be done in time. Therefore, portable device 60 cannot always receive a call response signal in response to a call request signal. Therefore, in the method of the present invention, after transmission of the call request signal, the state shifts to the communicating state without receiving the call response signal. It should be noted that the portable device 60 is in a communicating state even when a call response signal indicating communication non-permission is returned (in the case of communication NG). In this case, since the base station 30 continuously transmits a blank signal, it is sufficient to return to the idle (waiting) state upon receipt of the blank signal. An empty line signal is a signal that is always transmitted from the base station 30 when there is no communication.

(About transmission sequence)
Even if the portable device 60 immediately switches the connection of the transmitting/receiving antenna 68 in order to receive the transmission response signal after transmitting the transmission request signal in response to the user's transmission operation, the switching may not be completed in time. There is Therefore, the portable device 60 cannot necessarily receive the transmission response signal in response to the transmission request signal. Therefore, in the system of the present invention, after transmission of the transmission request signal, the transmission of the voice signal is started without receiving the transmission response signal. It should be noted that the portable device 60 is in the transmitting state even when a response signal indicating that transmission is not permitted is returned (in the case of transmission NG). In this case, if the transmission is stopped in response to the user's transmission stop operation and the state returns to the communicating state, or if the transmission time limit timer is started at the start of the transmission, the transmission is stopped after a certain period of time and the state returns to the communicating state. good.

(About the cutting sequence)
Even if the portable device 60 immediately switches the connection of the transmitting/receiving antenna 68 to receive the disconnection response signal after transmitting the disconnection request signal in response to the user's disconnection operation, the switching may not be done in time. Therefore, the portable device 60 cannot necessarily receive the disconnection response signal in response to the disconnection request signal. Therefore, in the system of the present invention, after the disconnection request signal is transmitted, the idle state is entered without receiving the disconnection response signal.

(Regarding the disconnect notification sequence during transmission)
The normal on-board station 40 recognizes the end of communication when it receives a disconnection notification signal transmitted from the base station 30. However, since the portable device 60 cannot receive during signal transmission, it cannot receive during transmission ( (during transmission of audio signals), the disconnection notification signal cannot be received. Therefore, in the method of the present invention, when the transmission is stopped and the state is returned to the communication state and reception becomes possible, the communication is terminated based on the blank line signal which is always transmitted after the disconnection notification signal from the base station 30. determine what you are doing. Even if the user is continuing the transmission operation (for example, while pressing the transmission button), when the transmission time limit timer expires, the transmission ends and the state returns to the busy state. You may judge the end of communication.

Hereinafter, the actual operation sequence and the test sequence will be compared and explained with reference to the sequence diagrams shown in FIGS. 4 to 13. FIG.
(Actual operation: transmission sequence)
FIG. 4 shows a transmission sequence for actual operation. The on-board station 40 is initially in an idle state (S0), and in response to receiving a transmission operation for starting communication with the command desk 10 from a user (for example, a train driver or a crew member), transmits a transmission. A request signal is transmitted, and the idle state (S0) shifts to the outgoing state (S1). A transmission request signal from the on-board station 40 is transmitted to the line control device 20 via the base station 30 . When the line control device 20 receives a call request signal from the on-board station 40, it transmits an incoming call request signal corresponding to the call request signal to the command console 10 side. Upon receiving the incoming call request signal, command console 10 transmits an incoming call response signal to the incoming call request signal. When receiving the incoming call response signal from the command desk 10, the line control device 20 transmits a caller response signal corresponding to the incoming call response signal to the on-board station 40 side. This call response signal is transmitted to the on-board station 40 via the base station 30 . When the on-board station 40 receives the call response signal corresponding to the call request signal transmitted in response to the call originating operation, the on-board station 40 shifts from the calling state (S1) to the communicating state (S2). In this way, when the on-board station 40 in the idle state (S0) receives a call originating operation, it goes through the calling state (S1) (waiting for reception of the call response signal) and then enters the communicating state (S2). Transition.

(for test: transmission sequence)
FIG. 10 shows a transmission sequence for testing. The difference from the transmission sequence in actual operation is that after the portable device 60 transmits a transmission request signal in response to receiving a transmission operation in the idle state (S0), the portable device 60 transmits (transmission) without going through the transmitting state (S1). The point is that the state shifts to the communicating state (S2) without waiting for the reception of the response signal. That is, in response to receiving from the user a transmission operation instructing transition from the idle state (S0) to the communicating state (S2), the portable device 60 transmits a transmission request signal corresponding to the transmission operation to the base station 30. after transmitting the call request signal, without waiting for the reception of the call response signal transmitted in response to the call request signal from the base station 30 side (omitting the calling state (S1)). is configured to shift to the in-communication state (S2) immediately.

(Actual operation: incoming sequence)
FIG. 5 shows an incoming call sequence in actual operation. The command console 10 transmits a call request signal in response to receiving a call origination operation for starting communication with the on-board station 40 from a user (for example, a commander in an operation control room). Upon receiving the call request signal from the command console 10, the line control device 20 transmits an incoming call request signal corresponding to the call request signal to the on-board station 40 side. This incoming call request signal is transmitted to the on-board station 40 via the base station 30 . The on-board station 40 is initially in an idle state (S0), and upon receiving an incoming call request signal, shifts from the idle state (S0) to a communicating state (S2). In addition, when the on-board station 40 receives the incoming call request signal and shifts to the communicating state (S2), the line control device 20 transmits an outgoing call response signal to the command console 10 side.

(for test: incoming sequence)
The test incoming sequence is the same as the actual operational incoming sequence (FIG. 5), so a detailed description is omitted.

(Actual operation: transmission sequence)
FIG. 6 shows a transmission sequence for actual operation. In the communication state (S2), the on-board station 40 transmits a transmission request signal in response to receiving a transmission operation for starting transmission to the command console 10 from the user, and is in the communication state. It shifts from (S2) to a state of waiting for permission to transmit (S3). A transmission request signal from the on-board station 40 is transmitted to the line control device 20 via the base station 30 . When the line control device 20 receives the transmission request signal from the on-board station 40, after confirming that there is no transmission by another on-board station, the line control device 20 transmits a transmission response signal corresponding to the transmission request signal on the vehicle. Transmit to the station 40 side. This transmission response signal is transmitted to the on-board station 40 via the base station 30 . When the on-board station 40 receives a transmission response signal corresponding to the transmission request signal transmitted in response to the transmission operation, the on-board station 40 shifts from the transmission permission waiting state (S3) to the transmitting state (S4), Transmission of a transmission signal (audio signal) addressed to the command desk 10 is started. In this way, when the on-board station 40 in the communication state (S2) accepts a speech transmission operation, it goes through the speech transmission permission waiting state (S3) (waiting for reception of the speech transmission response signal), and then transmits. It shifts to the intermediate state (S4).

(for test: transmission sequence)
FIG. 11 shows a test transmission sequence. The difference from the speech transmission sequence in actual operation is that the portable device 60 transmits a speech transmission request signal in response to reception of a speech transmission operation in the communicating state (S2), and then enters a speech transmission permission waiting state (S3). (without waiting for reception of the transmission response signal), the state shifts to the transmitting state (S4). That is, in response to receiving from the user a transmission operation instructing transition from the communicating state (S2) to the transmitting state (S4), the portable device 60 generates a transmission request corresponding to the transmission operation. after transmitting the transmission request signal to the base station 30, without waiting for the reception of the transmission response signal transmitted from the base station 30 in response to the transmission request signal (transmission permission waiting state). (S3) is omitted), and it is configured to quickly shift to the transmitting state (S4).

(Actual operation: disconnection sequence)
FIG. 7 shows a disconnection sequence for actual operation. In the communication state (S2), the on-board station 40 transmits a disconnection request signal in response to receiving a disconnection operation for terminating communication with the command console 10 from the user, and enters the communication state (S2). to the disconnecting state (S5). A disconnection request signal from the on-board station 40 is transmitted to the line control device 20 via the base station 30 . Upon receiving the disconnection request signal from the on-board station 40, the line control device 20 transmits a disconnection notification signal corresponding to the disconnection request signal to the command console 10 side and the on-board station 40 side. Upon receiving the disconnection notification signal corresponding to the disconnection request signal transmitted in response to the disconnection operation, the on-board station 40 shifts from the disconnected state (S5) to the idle state (S0). In this way, when the on-board station 40 in the communication state (S2) receives a disconnection operation, it goes through the disconnection state (S5) (waiting for reception of the disconnection notification signal) and then enters the idle state (S0). Transition.

(for testing: cutting sequence)
FIG. 12 shows a test disconnection sequence. The difference from the actual disconnection sequence is that after the portable device 60 transmits a disconnection request signal in response to receiving a disconnection operation in the communicating state (S2), the portable device 60 does not go through the disconnecting state (S5) ( The point is that it quickly shifts to the idle state (S0) without waiting for the reception of the disconnection notification signal. That is, in response to receiving from the user a disconnection operation instructing transition to the communicating state (S2) or the idle state (S0), the portable device 60 transmits a disconnection request signal corresponding to the disconnection operation to the base station 30. After transmitting the disconnection request signal, without waiting for reception of the disconnection notification signal transmitted in response to the disconnection request signal from the base station 30 side (omitting the disconnecting state (S5)), promptly It is configured to shift to the idle state (S0) immediately.

(Actual operation: disconnection notification sequence)
FIG. 8 shows a disconnect notification sequence for actual operation. The command console 10 transmits a call request signal in response to receiving a disconnection operation for terminating communication with the on-board station 40 from the user. Upon receiving the disconnection request signal from the command console 10, the line control device 20 transmits a disconnection notification signal corresponding to the disconnection request signal to the command console 10 side and the on-board station 40 side. When the on-board station 40 receives the disconnection notification signal in the communicating state (S2), it shifts from the communicating state (S2) to the idle state (S0).

(for test: disconnection notification sequence)
Since the test disconnection notification sequence is the same as the actual disconnection notification sequence (FIG. 8), a detailed description thereof will be omitted.

(Actual operation: Disconnection notification sequence during transmission)
FIG. 9 shows a disconnect notification sequence during transmission in actual operation. The command console 10 transmits a call request signal in response to receiving a disconnection operation for terminating communication with the on-board station 40 from the user during transmission from the on-board station 40 . Upon receiving the disconnection request signal from the command console 10, the line control device 20 transmits a disconnection notification signal corresponding to the disconnection request signal to the command console 10 side and the on-board station 40 side. When the on-board station 40 receives the disconnection notification signal in the transmitting state (S4), it ends the transmission and shifts from the transmitting state (S4) to the idle state (S0).

(For testing: disconnect notification sequence during transmission)
FIG. 13 shows a disconnect notification sequence during transmission for testing. The difference from the cut-in-transmitting notification sequence in actual operation is that the portable device 60 cannot receive a cut-off notification signal even if it is transmitted in the transmitting state (S4). The point is that the state shifts to the communicating state (S2) in response to pressing release), and then shifts to the idle state (S0) when a no-line signal is received. That is, when the simplex portable device 60 is tested, the transmission is continued even if the disconnection notification signal is transmitted from the base station 30, and the end of the communication is judged based on the presence or absence of the empty line signal after the end of the transmission. .

As described above, the portable wireless device 60 according to the present embodiment, in response to receiving an operation from the user instructing a shift from the first operation state to the second operation state, outputs a request signal corresponding to the operation. is transmitted to the base station 30 side, and after transmitting the request signal, without waiting for reception of a response signal transmitted from the base station 30 side in response to the request signal, the operation state is shifted to the second operation state. ing.
According to the portable radio device 60 having such a configuration, a sequence designed assuming a duplex system (sequence in which a response signal is transmitted from the base station in response to a request signal transmitted from the portable radio device) is used. can correspond.

Therefore, the simplex portable radio 60 can be used to test the radio environment between a mobile station and a base station that perform duplex radio communication. Moreover, since the portable radio 60 does not need to be equipped with an antenna duplexer, it can be made relatively small and lightweight, and is suitable for use by workers walking on railroad tracks for communication tests. . Further, as is clear from the explanation of the above sequence, since there is no change in the operations of the base station 30, the line controller 20, and the command console 10, it is possible to carry out a communication test without modifying the system. Therefore, it is possible to easily test the radio environment between the mobile station and the base station that perform duplex radio communication.

As described above, the portable radio device according to the present invention has been described as being used for testing a train radio system, but it goes without saying that it can also be used for testing other radio communication systems.
Further, the present invention provides, for example, a method and system for executing the processing according to the present invention, a program for realizing such a method and system using hardware resources such as a memory and a processor, and a memory for storing the program. It is also possible to provide it as a medium or the like.

INDUSTRIAL APPLICABILITY The present invention can be used to test the radio environment between a mobile station and a base station that perform duplex radio communication.

10: command console, 20: line control device, 30: base station, 40: on-board station, 50: portable radio (duplex system), 60: portable radio (simple system),
51: receiver, 52: control device, 53: arithmetic device, 54: storage device, 55: transmitter, 56: receiver, 57: antenna duplexer, 58: transmitting/receiving antenna,
61: receiver, 62: control device, 63: arithmetic device, 64: storage device, 65: transmitter, 66: receiver, 67: antenna switch, 68: transmitting/receiving antenna

Claims (5)

A simplex portable radio used for testing the radio environment between a mobile station and a base station that perform FDMA radio communication,
transmitting a request signal corresponding to the operation to the base station in response to receiving an operation from a user of the portable wireless device to instruct transition from the first operation state to the second operation state;
After transmitting the request signal, the portable wireless device shifts to the second operation state without waiting for reception of a response signal transmitted from the base station in response to the request signal. The portable radio device according to claim 1,
When the first operating state is the idle state and the second operating state is the communicating state , a call origination request corresponding to the call origination operation is accepted in the idle state. transmitting a signal to the base station;
After transmitting the call request signal, the portable wireless device shifts to the communicating state without waiting for reception of a call response signal transmitted from the base station in response to the call request signal. . In the portable radio device according to claim 1 or claim 2,
When the first operating state is the communicating state and the second operating state is the transmitting state, in response to receiving a voice transmitting operation in the communicating state, the transmitting operation is performed. transmitting a corresponding transmission request signal to the base station side;
After transmission of the transmission request signal, the state is shifted to the transmitting state without waiting for reception of a transmission response signal transmitted from the base station in response to the transmission request signal. portable radio. The portable wireless device according to any one of claims 1 to 3,
When the first operating state is the communicating state and the second operating state is the idle state, in response to receiving a disconnection operation in the communicating state, a disconnection request corresponding to the disconnection operation. transmitting a signal to the base station;
After transmitting the disconnection request signal, the portable wireless device shifts to the idle state without waiting for reception of a disconnection notification signal transmitted from the base station in response to the disconnection request signal. A wireless communication system that uses a portable wireless device instead of the mobile station to test a wireless environment between a mobile station that performs FDMA wireless communication and a base station,
The portable wireless device transmits a request signal corresponding to the operation in response to receiving from the user of the portable wireless device an operation instructing transition from the first operating state to the second operating state. transmitted to the base station side,
When the base station receives the request signal, the base station transmits a response signal corresponding to the request signal to the portable wireless device,
The radio communication system, wherein after transmitting the request signal, the portable wireless device shifts to the second operating state without waiting for reception of the response signal transmitted from the base station.

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