JP2006100868A - Radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication system for suppressing the effect on the operation of other base station radio equipment even when a fault takes place in a line between a controller 2 and base station radio equipments 21, 22, 31, 32. <P>SOLUTION: The controller transmits a frequency setting control signal to the base station radio equipment via a line, the base station radio equipment receiving the frequency setting control signal transmits an acknowledgement signal to the controller via the line, and the controller transmits no transmission control signal to the base station radio equipment when receiving no acknowledgement signal as its control. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radio communication system in which a control apparatus controls setting of a frequency used by a base station radio apparatus and transmission by the base station radio apparatus, and particularly, for example, on a line between the control apparatus and the base station radio apparatus. The present invention relates to a radio communication system that suppresses the influence on the operation of another base station radio apparatus even when a failure occurs.

For example, as a radio apparatus (base station radio apparatus) for a base station apparatus in a radio communication system, one that sets a frequency in the base station radio apparatus itself and one that sets a frequency in the base station radio apparatus by a signal from a control apparatus There is.
In a wireless communication system in which a frequency is set in a base station wireless device by a control device, a plurality of base station devices can be shared, and each base station wireless device is installed in a base station device having a plurality of base station wireless devices. There is an advantage that can be shared.

FIG. 5 shows an example of base station devices 41a and 41b and a control device 42 provided in such a wireless communication system.
In this example, two base station apparatuses 41a and 41b are connected to one control apparatus 42, and two base station radio apparatuses 51, 52, 61 and 62 are connected to each base station apparatus 41a and 41b. Is provided.
Each base station radio apparatus 51, 52, 61, 62 in each base station apparatus 41 a, 41 b sets a frequency by a frequency setting control signal from the control apparatus 42. The control device 42 repeatedly transmits the frequency setting control signal to each of the base station wireless devices 51, 52, 61, 62, and each of the base station wireless devices 51, 52, 61, 62 transmits the frequency setting control signal. The frequency is set every time reception is performed. Moreover, the control apparatus 42 starts transmission by each base station radio | wireless apparatus 51, 52, 61, 62 by a transmission control signal as needed.
Here, for example, different frequencies are set in the base station radio apparatuses 51, 52, 61, and 62, respectively.

ARIB STD-T87, "Airport Digital Mobile Communication System", The Japan Radio Industry Association

  However, in the configuration as shown in FIG. 5, for example, a failure occurs in the line between the control device 42 and the base station radio devices 51, 52, 61, 62, so that the base station radio devices 51, 52, When it becomes impossible to receive the frequency setting control signal from the control device 42 by 61, 62, the base station radio devices 51, 52, 61, 62 do not execute the frequency setting, and the base station radio devices 51, 52 , 61, 62 may be indefinite. As a result, the base station radio devices 51, 52, 61, 62 whose frequency has become undefined may use the same frequency as the other base station radio devices 51, 52, 61, 62. In this case, if the transmission by the base station radio apparatus 51, 52, 61, 62 whose frequency is indefinite is executed from the control apparatus 42, the operation of the other base station radio apparatuses 51, 52, 61, 62 is disturbed. There was a problem of giving.

  The present invention has been made to solve such a conventional problem. When the control device controls the setting of the frequency used by the base station radio device and the transmission by the base station radio device, for example, control is performed. An object of the present invention is to provide a radio communication system that can suppress the influence on the operation of other base station radio apparatuses even when a failure occurs in a line between the apparatus and the base station radio apparatus.

In order to achieve the above object, in a wireless communication system according to the present invention, a control device and a base station wireless device are connected by a line, the control device controls the base station wireless device, and the base station wireless device In the configuration for wireless communication, the following processing is performed.
That is, in the control device, the frequency setting control signal transmitting means transmits a signal (frequency setting control signal) for controlling setting of a frequency used by the base station wireless device via the line to the base station wireless device. Send to. Moreover, a transmission control signal transmission means transmits a signal (transmission control signal) for controlling radio transmission by the base station radio apparatus to the base station radio apparatus via the line.

  In the base station radio apparatus, the frequency setting control signal receiving means receives a signal for controlling the setting of the frequency (the frequency setting control signal) transmitted from the control apparatus. Further, the frequency setting means sets a frequency to be used for radio transmission based on a signal (frequency setting control signal) for controlling the setting of the frequency received by the frequency setting control signal receiving means. The response signal transmitting means sends a response signal to the control device in response to reception of a signal for controlling the setting of the frequency (the frequency setting control signal) by the frequency setting control signal receiving means. And transmit via the line. Moreover, a transmission control signal receiving means receives the signal (the transmission control signal) for controlling the wireless transmission transmitted from the control device via the line. Further, the wireless transmission execution means uses the frequency set by the frequency setting means based on the signal (the transmission control signal) for controlling the wireless transmission received by the transmission control signal receiving means, Perform transmission.

  In the control device, response signal receiving means receives the response signal transmitted from the base station radio device via the line. Further, the transmission control signal non-transmitting means transmits the frequency setting from the base station radio apparatus to which the signal for controlling the setting of the frequency (the frequency setting control signal) is transmitted by the frequency setting control signal transmitting means. When the response signal to the control signal is not received by the response signal receiving means (that is, not received), the radio transmission by the transmission control signal transmitting means for the base station radio apparatus is controlled. The signal (the transmission control signal) is not transmitted (that is, not transmitted).

  Therefore, in response to the frequency setting control signal transmitted from the control device to the base station wireless device via the line, when the response signal from the base station wireless device is not received by the control device, Since the transmission control signal for the base station radio apparatus is not transmitted from the control apparatus, for example, even when a failure occurs in the line between the control apparatus and the base station radio apparatus, the other base station radio apparatus The impact on operations can be suppressed.

Here, as a line connecting the control device and the base station wireless device, for example, a wired line is used, but a wireless line may be used.
Further, as the wireless communication by the base station wireless device, for example, not only wireless transmission but also wireless reception may be performed.
Various signals may be used as a signal for controlling the setting of the frequency used by the base station radio apparatus (frequency setting control signal), for example, a signal designating a specific frequency to be used, A signal for instructing increase or decrease of the frequency to be used, a signal for instructing switching of the frequency to be used in the order of a plurality of preset frequencies, and the like can be used.
Various signals may be used as a signal (transmission control signal) for controlling radio transmission by the base station radio apparatus. For example, a signal that instructs the base station radio apparatus to perform radio transmission. Alternatively, a signal that is a target of wireless transmission by the base station wireless device can be used.

Various signals may be used as a response signal to the frequency setting control signal. For example, a signal capable of notifying that the frequency setting control signal has been received is used.
In the control device, various modes may be used as a mode for detecting that the response signal to the frequency setting control signal is not received from the base station radio device. For example, one frequency setting control is performed. A mode in which no response is detected when no response signal is received in response to signal transmission, or no response signal is received in response to predetermined multiple frequency setting control signal transmissions. In some cases, a mode of detecting that there was no reception can be used. Further, as an aspect for determining that the response signal for each frequency setting control signal is not received (that is, not received), for example, a predetermined time has elapsed from the transmission timing of the frequency setting control signal Even when the response signal is not received, a mode in which no response is received can be used.

The radio communication system according to the present invention has the following configuration.
That is, the control device and the plurality of base station radio devices are connected by different lines, and the control device controls each base station radio device.
The frequency setting control signal transmission means of the control device controls setting of a frequency used by each of the base station radio devices so as to set a different frequency for each of the plurality of base station radio devices. A signal (frequency setting control signal) is transmitted to each base station radio apparatus via each line.

  Therefore, in a configuration in which the control device and the plurality of base station radio devices are connected via different lines, different frequencies are set for the respective base station radio devices, thereby preventing interference between radio transmission signals. In addition, for example, even when a failure occurs in a line between the control device and a certain base station radio device, the operation of the base station radio device is stopped. Can be prevented.

Here, various numbers may be used as the number of base station radio apparatuses.
Also, for example, one base station apparatus may be provided with one base station apparatus, or a plurality of base station radio apparatuses may be provided with one base station apparatus.

  As described above, according to the wireless communication system according to the present invention, the control device transmits the signal (frequency setting control signal) for controlling the setting of the frequency used by the base station wireless device via the line. When the base station radio apparatus receives the frequency setting control signal transmitted from the control apparatus, the base station radio apparatus sets the frequency used for radio transmission based on the frequency setting control signal and sends a response signal to the control apparatus. When the response signal from the base station radio device is not received, the control device controls the radio transmission to the base station radio device (transmission control signal). For example, even when a failure occurs in the line between the control device and the base station radio device, the operation of other base station radio devices is prevented. It is possible to suppress the sound.

An embodiment according to the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration example of an airport digital mobile communication system as a wireless communication system according to an embodiment of the present invention.
The wireless communication system of this example includes base station devices 1a and 1b, a control device 2, and a plurality of terminal devices 11, 12, and 13.
Here, the control device 2 is a device that controls the base station devices 1a and 1b.
The terminal device 11 and the terminal device 12 are carried by a person, and the terminal device 13 is mounted on a vehicle such as an automobile, and any of the terminal devices 11 to 13 can be used as a mobile station device that can move. .
Note that various numbers may be used as the number of base station apparatuses 1 and the number of terminal apparatuses 11 to 13, respectively.
In this example, voice signals and data signals are communicated wirelessly between the base station device 1 and the terminal devices 11 to 13 accommodated in the communication area (service area) of the base station device 1.

FIG. 2 shows an example of a physical channel slot arrangement for communication (downlink communication) from the base station apparatus 1 to the terminal apparatuses 11 to 13 and communication (uplink communication) from the terminal apparatuses 11 to 13 to the base station apparatus 1. Is shown.
In downlink communication and uplink communication, four physical channel slots CH1, CH2, CH3, and CH4 are arranged in a time-sharing manner. In downlink communication and uplink communication, the slot arrangement is shifted by the time corresponding to two slots. ing.
As described above, in this example, a plurality of channels are configured by the time division communication method. However, a plurality of channels are configured by, for example, a code division communication method, a frequency division communication method, or a combination of two or more methods. May be.

FIG. 3 shows a configuration example of the base station apparatuses 1a and 1b and the control apparatus 2 provided in the wireless communication system of this example.
In this example, two base station apparatuses 1a, 1b are connected to one control apparatus 2, and two base station radio apparatuses 21, 22, 31, 32 are connected to each base station apparatus 1a, 1b. Is provided.
The control device 2 is connected to each base station radio device 21, 22, 31, 32 in each base station device 1a, 1b via a respective line.

The control device 2 is used to set a frequency used for wireless communication to each base station radio device 21, 22, 31, 32 in each base station device 1a, 1b via each line. It has a function of transmitting a signal (frequency setting control signal).
Each base station radio apparatus 21, 22, 31, 32 in each base station apparatus 1a, 1b receives the frequency setting control signal transmitted from the control apparatus 2 via each line, and receives the received frequency. The frequency used for wireless communication is set according to the content instructed by the setting control signal.

Moreover, in this example, when each base station radio | wireless apparatus 21,22,31,32 in each base station apparatus 1a, 1b receives the frequency setting control signal from the control apparatus 2, the said frequency setting control is performed. A predetermined response signal is transmitted (returned) to the control device 2 after or before the frequency is set by the signal.
In this example, the control device 2 repeatedly transmits a frequency setting control signal to each base station radio device 21, 22, 31, 32 at a timing such as every fixed period. Each time the devices 21, 22, 31, and 32 receive the frequency setting control signal, the devices 21, 22, 31, and 32 perform frequency setting and response signal return.

Here, in each of the base station radio apparatuses 21, 22, 31, and 32, for example, different frequencies are set as transmission frequencies, and different frequencies are set as reception frequencies.
In each base station radio apparatus 21, 22, 31, and 32, the same frequency may be used as the frequency for transmission and the frequency for reception, or different frequencies may be used.

In addition, when it is necessary for the control device 2 to perform radio transmission to the base station radio devices 21, 22, 31, and 32 in the base station devices 1a and 1b, Via the transmission control signal.
Each base station radio device 21, 22, 31, 32 in each base station device 1a, 1b receives the transmission control signal transmitted from the control device 2 via the line, and receives the transmission control signal. Accordingly, the wireless transmission operation is activated and executed. The wireless transmission operation is executed at a frequency set by control from the control device 2.

  In this example, when the control apparatus 2 transmits a frequency setting control signal to a certain base station radio apparatus 21, 22, 31, 32, the base station radio apparatus 21, 22, 31, 32 When the response signal is not received, communication with the base station radio apparatuses 21, 22, 31, 32 is normal because a failure has occurred in the line between the base station radio apparatuses 21, 22, 31, 32. The base station radio apparatus 21, 22, 31, 32 is stopped, and a transmission control signal is transmitted to the base station radio apparatus 21, 22, 31, 32. In other words, it is prohibited to perform radio transmission from the base station radio apparatuses 21, 22, 31, 32.

FIG. 4 shows an example of the procedure of processing performed by the control device 2 of this example.
In this example, a case where the control device 2 controls the base station radio device 21 will be described as an example. The same applies to the case of controlling the other base station radio apparatuses 22, 31, and 32.
When the control device 2 transmits a frequency setting control signal to the base station radio device 21 to be controlled (step S1), the control device 2 waits for reception of a response signal from the base station radio device 21 (step S2). When a response signal is received from the base station radio apparatus 21 (step S3), the frequency setting control signal is periodically transmitted repeatedly (steps S1 to S3). When the control device 2 transmits a frequency setting control signal to the base station radio device 21 but does not receive a response signal from the base station radio device 21 (step S3), the base station radio device 21 And the transmission from the base station radio apparatus 21 is prohibited (step S4), and for example, for other base station radio apparatuses, the periodic frequency setting control signal is repeatedly transmitted (steps S1 to S1). Step S3).

  Here, even if the control device 2 transmits a frequency setting control signal to a certain base station radio device 21, 22, 31, 32 via a line, the base station radio device 21, 22, 31, 32 Not receiving a response signal means, for example, that the elapsed time since the transmission of the frequency setting control signal is counted by a timer or counter, and that the timer has reached a predetermined timer value (timed out), or that the counter has It can be detected that the counter value has reached (counted out).

  Further, for example, when the control device 2 does not receive a response signal from a certain base station radio device 21, 22, 31, 32, and when the time-out or the count-out occurs, the base station radio The devices 21, 22, 31, and 32 are listed as device candidates to be stopped (excluded), stored in the memory, and then the base station radio devices 21 and 22 a predetermined number of times, that is, once or a plurality of times. , 31, 32 to determine whether or not a response signal is received from the base station radio apparatus 21, 22, 31, 32 (retry), and the predetermined number of times. If a response signal response is not received from the base station radio device 21, 22, 31, 32 even after a retry (attack), use the base station radio device 21, 22, 31, 32. It is also possible to use a stop, such as configuration when.

  Further, for example, when the control device 2 stops using a certain base station radio device 21, 22, 31, 32, this is related to communication with the base station radio device 21, 22, 31, 32. As a signal indicating that there is a failure, a predetermined base station device (other predetermined base station device) other than the base station devices 1a and 1b having the base station wireless devices 21, 22, 31, and 32, It is also possible to use a configuration in which transmission is performed to an arbitrary station such as a terminal device (in this example, a predetermined mobile station device), a predetermined monitoring station device, or a predetermined management station device.

  As described above, the wireless communication system of this example includes a plurality of base station wireless devices 21, 22, 31, 32 and the control device 2, and the base station wireless devices 21, 22 are transmitted by the frequency setting control signal from the control device 2. , 31, 32, and the base station radio apparatuses 21, 22, 31, 32 are configured to execute the transmission of the base station radio apparatuses 21, 22, 31, 32 by the transmission control signal from the control apparatus 2. Receives a frequency setting control signal from the control device 2, transmits a response signal to the frequency setting control signal, and when the response signal is interrupted and the control device 2 does not receive the response signal, the control device 2 When it is determined that a failure has occurred in the line between the base station radio apparatus 21, 22, 31, 32 and the control apparatus 2, the operation of the base station radio apparatus 21, 22, 31, 32 is performed. Stop, so as not to perform transmission to the radio base station 21, 22, 31, 32.

  Therefore, in the radio communication system that sets the frequencies of the base station radio apparatuses 21, 22, 31, and 32 by the frequency setting control signal from the control apparatus 2, the control apparatus 2 moves to the base station radio apparatuses 21, 22, 31, and 32. For example, the control device 2 and a certain base station radio device 21, for example, stop the operation of the base station radio device 21, 22, 31, 32 when there is no response. Even when the base station radio apparatus 21, 22, 31, 32 does not receive the frequency setting control signal due to a failure in the line with the line 22, 31, 32, the base station radio apparatus 21 , 22, 31 and 32 can be prevented from interfering with the operation of other base station radio apparatuses, and good communication quality can be guaranteed.

  The radio communication system of this example is, for example, a system that controls the radio frequency of the base station radio devices 21, 22, 31, 32 from the control side such as a center station, or a plurality of base station radio devices 21, 22, 31, 32. The present invention is effective for application to a multi-channel access (MCA) system using a network.

  In the control device 2 of this example, the frequency setting control signal transmitting means is configured by the function of transmitting the frequency setting control signal to each base station radio device 21, 22, 31, 32 via each line. The base station radio apparatuses 21, 22, 31 and 32 have a function of transmitting a transmission control signal via each line to constitute a transmission control signal transmission means. , 32 is configured to receive a response signal via each line, and a response signal receiving unit is configured. A transmission control signal is transmitted to the base station radio apparatuses 21, 22, 31, 32 that have not received the response signal. A transmission control signal non-transmission means is configured by the function of controlling so as not to transmit.

  Moreover, in each base station radio | wireless apparatus 21, 22, 31, and 32 of this example, the frequency setting control signal receiving means is comprised by the function which receives a frequency setting control signal from the control apparatus 2 via each line | wire, The frequency setting means is configured by the function of setting the frequency used for radio transmission based on the frequency setting control signal, and a response signal is sent via each line in response to receiving the frequency setting control signal from the control device 2. The response signal transmitting means is configured by the function of transmitting to the control device 2, and the transmission control signal receiving means is configured by the function of receiving the transmission control signal from the control device 2 via each line. The wireless transmission execution means is configured by the function of executing wireless transmission using the frequency set based on the transmission control signal.

Here, the configurations of the radio communication system, the base station device, the base station radio device, the control device, and the like according to the present invention are not necessarily limited to those described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various devices and systems.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various processes performed in the wireless communication system, the base station apparatus, the base station wireless apparatus, the control apparatus, and the like according to the present invention, for example, the processor is a ROM (Read Only Memory) in hardware resources including a processor and a memory. A configuration controlled by executing a control program stored in () may be used, and for example, each functional means for executing the processing may be configured as an independent hardware circuit.
The present invention can also be understood as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, and the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

It is a figure which shows the structural example of a radio | wireless communications system. It is a figure which shows an example of the slot arrangement | positioning of a physical channel. It is a figure which shows an example of communication with the base station radio | wireless apparatus and control apparatus which are provided in the radio | wireless communications system which concerns on one Example of this invention. It is a figure which shows an example of the procedure of the process performed by a control apparatus. It is a figure which shows an example of communication with the base station radio | wireless apparatus and control apparatus which are provided in a radio | wireless communications system.

Explanation of symbols

  1a, 1b, 41a, 41b .. base station device, 2 .. control device, 11 to 13 .. terminal device, 21, 22, 31, 32, 51, 52, 61, 62 .. base station radio device,

Claims (2)

In a wireless communication system in which a control device and a base station wireless device are connected by a line, the control device controls the base station wireless device, and the base station wireless device communicates wirelessly,
The control device, a frequency setting control signal transmitting means for transmitting a signal for controlling the setting of the frequency used by the base station wireless device to the base station wireless device via the line;
Transmission control signal transmission means for transmitting a signal for controlling radio transmission by the base station radio apparatus to the base station radio apparatus via the line,
The base station radio device receives a frequency setting control signal receiving means for receiving a signal for controlling the setting of the frequency transmitted from the control device;
Frequency setting means for setting a frequency used for wireless transmission based on a signal for controlling the setting of the frequency received by the frequency setting control signal receiving means;
Response signal transmitting means for transmitting a response signal to the control device via the line in response to reception of a signal for controlling the setting of the frequency by the frequency setting control signal receiving means;
A transmission control signal receiving means for receiving a signal for controlling the wireless transmission transmitted from the control device via the line;
Wireless transmission execution means for performing wireless transmission using the frequency set by the frequency setting means based on the signal for controlling the wireless transmission received by the transmission control signal receiving means,
The control device includes response signal receiving means for receiving the response signal transmitted from the base station radio device via the line;
The response signal for the frequency setting control signal is not received by the response signal receiving means from the base station radio apparatus to which the signal for controlling the frequency setting is transmitted by the frequency setting control signal transmitting means. In the case, the transmission control signal non-transmission means for non-transmission of the signal for controlling the radio transmission by the transmission control signal transmission means for the base station radio apparatus,
A wireless communication system. The wireless communication system according to claim 1, wherein
The control device and the plurality of base station radio devices are connected by different lines, and the control device controls each of the base station radio devices,
The frequency setting control signal transmission means of the control device controls setting of a frequency used by each of the base station radio devices so as to set a different frequency for each of the plurality of base station radio devices. Transmitting a signal to each of the base station radio devices via each of the lines;
A wireless communication system.

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