JP2020048065A - Radio communication system - Google Patents

Abstract

To provide a technique capable of broadcasting of both systems by one time operation using one console in a radio communication system including different communication methods.SOLUTION: A radio communication system includes a console, a first base station, and a second base station whose communication method is different from that of the first base station. The console reports voice to the first base station and simultaneously records the voice. After completing the report to the first base station, the console performs a process of reporting the recorded voice to the second base station.SELECTED DRAWING: Figure 7

Description

  The present disclosure relates to a wireless communication system, and is particularly applicable to a digital broadcast communication system using a plurality of base stations for reporting.

  One of the wireless communication systems is a digital broadcast communication system. The digital broadcast communication system is a system that is set up at the municipal level.It has a master station facility installed at the city hall and other stations installed on the household side of the residents. This is a system that provides disaster prevention information and notifications to residents by reporting via the Internet. FIG. 1 is a configuration example of this system. The wireless communication system 10 includes a console 20 and a base station 1 operated by a local government staff (also referred to as a user) A, and a master station facility (operator 20 and base station 1) installed in a city hall or the like, B station equipment 30 installed on the household side of B. The master station equipment (operation console 20, base station 1) of the present system reports disaster prevention information to the slave station equipment 30 by transmitting voice or data. The following wireless standards exist in such a system.

"Municipal Digital Broadcasting System ARIB-STD-T86" Association of Radio Industries and Businesses "Municipal Digital Broadcasting System TYPE2 ARIB-STD-T115" Association of Radio Industries and Businesses

  In a digital broadcast communication system, when a plurality of base stations are arranged close to each other, mutual interference must be considered.

  On the other hand, when a user desires to establish a service area or operates a system with different wireless standards in combination, the physical location of base stations with different wireless standards is difficult due to restrictions on the installation locations of the base stations and to secure service areas. Must be adjacent.

  However, the frequencies that can be used by each system may not be selected so as not to interfere with each other due to the effective use of radio waves. In this case, the same or nearby frequencies must be used.

  At this time, when the paging control of the base stations of both systems is performed by one console, the timings of transmitting the paging signals are simultaneous, so that the use of the same or nearby frequencies causes interference.

  Further, when one console is assigned to each system and paging control of the base station is performed for each system, signal interference does not occur between the base stations, but since the user must operate a plurality of consoles, Operation becomes complicated.

  It is an object of the present disclosure to provide a technology that enables broadcasting of both systems by a single operation using a single console in a wireless communication system in which different communication systems are mixed.

  Other problems and novel features will be apparent from the description of this specification and the accompanying drawings.

  The outline of a typical one of the present disclosure will be briefly described as follows.

  That is, the wireless communication system includes a console, a first base station, and a second base station having a communication method different from that of the first base station. The console reports the voice to the first base station and simultaneously records the voice. After the report to the first base station is completed, the console performs a process of reporting the recorded voice to the second base station.

  According to the above wireless communication system, even in a wireless communication system in which different communication methods are mixed, the first base station and the second base station can be operated by one operation using one console. It is possible to broadcast.

FIG. 2 is a diagram illustrating a configuration example of a digital broadcast communication system. 1 is a diagram illustrating a wireless communication system in which two wireless standards according to an embodiment are mixed. FIG. 3 is a diagram illustrating a communication range covered by one base station. FIG. 3 is a diagram illustrating a communication range covered by two base stations. FIG. 9 is a diagram illustrating a communication sequence according to Comparative Example 1. FIG. 9 is a diagram illustrating a communication sequence according to Comparative Example 2. FIG. 3 is a diagram illustrating a communication sequence according to the embodiment. FIG. 9 is a diagram illustrating a communication sequence when monitoring a slave station facility according to a comparative example. It is a figure showing the communication sequence at the time of monitoring the slave station facility concerning an embodiment.

  Hereinafter, embodiments and comparative examples will be described with reference to the drawings. However, in the following description, the same components will be denoted by the same reference symbols, and repeated description may be omitted. The drawings may be schematically illustrated as compared with actual embodiments in order to make the description clearer, but are merely examples and do not limit the interpretation of the present invention.

  FIG. 2 is a diagram illustrating a wireless communication system according to the embodiment in which two wireless standards are mixed.

  Two wireless standards (STD-T86 and STD-T115) having different modulation schemes use the same frequency band, but have no compatibility in a wireless section. The municipality basically adopts one of the standards and prepares the disaster prevention radio equipment. However, depending on the status of the municipality, as shown in FIG. 2, both standards (STD-T86 and STD-T115) are mixed. It is also conceivable to do maintenance.

  FIG. 3 is a diagram illustrating a communication range covered by one base station, and FIG. 4 is a diagram illustrating a communication range covered by two base stations. As shown in FIG. 4, by installing a plurality of base stations 1 and 2 in the communication range (service area) shown in FIG. 3, base station 1 in which both standards (STD-T86 and STD-T115) are mixed can be used. 2 can be maintained. In the case of FIG. 4, the base stations 1 and 2 are installed adjacently to construct a service area. At this time, when a single console 20 attempts to control the paging of a plurality of base stations 1 and 2, a paging signal is simultaneously transmitted to the base stations 1 and 2. However, if the frequencies are the same or close to each other, the frequencies interfere with each other, so that communication with the slave station equipment (30, 31) cannot be performed.

  FIG. 5 is a diagram illustrating a communication sequence according to Comparative Example 1. In Comparative Example 1, a plurality of base stations 1 and 2 are paging-controlled (paging operation) by one console 20, and voice is transmitted to the slave station equipment (30, 31). In the sequence of FIG. 5, the console 20 simultaneously sends out a call signal to the base stations 1 and 2 (see S60).

  In this case, when the frequency is different, communication with the slave station equipment (30, 31) can be performed. However, if the frequencies are the same or close to each other, the frequencies interfere with each other, so that communication with the slave station equipment (30, 31) cannot be performed.

  FIG. 6 is a diagram illustrating a communication sequence according to Comparative Example 2. In Comparative Example 2, a plurality of consoles (20, 20a) are provided, and the consoles and base stations are associated with each other at a ratio of 1: 1 (the console 20 and the base station 1, and the console 20a and the base station 2). Sending voices at different times.

  In this case, it is necessary to perform the calling operation (70, 70a) on the console a plurality of times for one message desired by the user (A), so that the operation becomes complicated.

  FIG. 7 is a diagram illustrating a communication sequence according to the embodiment. The communication sequence of FIG. 7 shows a communication sequence in the case where a plurality of base stations (1 to n) are provided for one console 20. Note that FIG. 7 shows only the base stations 1 and 2 for simplification of the drawing. The wireless standard used by the base station 1 and the receiving target (slave station equipment) 30 of the base station 1 is different from the wireless standard used by the base station 2 and the receiving target (slave station equipment) 31 of the base station 2. Standard, but use the same or nearby frequency bands. Similarly, the wireless standard used by the base station 1 and the reception target (slave station equipment) 30 of the base station 1 and the reception target (child) of the other base stations (3 to n) and the base station (3 to n) Although the wireless standard is different from the wireless standard used by the station equipment, the same or nearby frequency band is used.

Hereinafter, the communication sequence will be described.
The user A performs a calling operation on the console 20 (step S1).
The console 20 sends a call message to the base station 1 (step S2).
The base station 1 sends a call message to a reception target (slave station equipment) 30 under the control of the base station 1 (step S3).
The base station 1 sends a reportable message to the console 20 (step S4).
The console 20 establishes a voice path to the base station 1, and the user A performs voice transmission (step S5).
The voice is transmitted to the target 30 via the base station 1 (step S6).
The console 20 records the transmitted voice simultaneously with the transmission (step S7).
After the voice transmission ends, the user A performs a call end operation on the console 20 (step S8).
The console 20 sends a call termination message to the base station 1 (step S9).
The base station 1 sends a call termination message to the reception target (slave station equipment) 30 under the control of the base station 1 (step S10).

After entering the standby state, the console 20 sends a call message to the next base station 2 without the operation of the user A (step S11).
The base station 2 sends a call message to a reception target (slave station equipment) 31 under the control of the base station 2 (step S12).
The base station 2 sends a reportable message to the console 20 (step S13).
The console 20 establishes an audio path to the base station 2. The console 20 reproduces the voice recorded during the voice transmission of the base station 1 (step S14).
The reproduced sound is transmitted to the reception target 31 via the base station 2 (step S15).
After the voice transmission is completed, the console 20 sends a call termination message to the base station 2 (step S16).
The base station 2 sends a call termination message to the reception target (slave station equipment) 31 under the control of the base station 2 (step S17).
Thereafter, Steps S11 to S17 are repeated until the report of all the receiving targets to be called is completed (Step S18).

  As described above, in the control of the base station (1-n) from the console 20, the timing for calling the base station (1-n) is controlled for each base station (1-n).

  After the paging operation by the user A, a paging signal of the first base station (1) is transmitted, and a report is made to the slave station equipment 30 to be received by the first base station (1). At the time of the voice transmission of the notification, the voice transmitted by the user A is recorded on the console 20.

  After the user A performs the call end operation, the call to the slave station 30 to be received by the first base station (1) is ended. The console 20 spontaneously initiates a call to the second base station (2). At this time, for the user A, the same content is reported to the slave station equipment 31 to be received by the second base station (2), so that the voice transmission is performed by the voice transmission of the first base station (1). Play back the sound recorded in. By using the reproduced voice, the user A can transmit voice to a plurality of base stations (1 to n) only by operating the console 20 once. After the reproduction of the voice is completed, the console 20 spontaneously sends the end signal. This is repeated for the number of base stations connected to the console 20.

  Therefore, even in the wireless communication system 10 in which different communication systems (STD-T86, STD-T115) are mixed, the first base station (1) can be operated by one operation using one console 20. And the second base station (2).

  FIG. 8 is a diagram illustrating a communication sequence when monitoring a slave station facility according to the comparative example.

  The example illustrated in FIG. 8 illustrates a case where the slave station facilities 30 and 32 are slave station facilities under the control of the base station 1 and the slave station facility 31 is a slave station facility under the control of the base station 2. It is also assumed that slave station numbers 1, 2, and 3 are assigned to the slave station equipments 30, 31, and 32 in this order. Also, although n base stations (1-n) are provided, FIG. 8 shows only base stations 1 and 2.

  As shown in FIG. 8, when monitoring the slave station equipment (30, 31, 32), monitoring may be performed in the order of the slave station numbers. In the case of this system configuration, the base station (1, 2) to be transmitted must be switched for each number of the slave station equipment (30, 31, 32) (see S90, S91, S92), and the switching time increases. However, there is a problem that the communication sequence of the wireless communication system by monitoring increases, and as a result, the occupation time of the system increases.

  FIG. 9 is a diagram illustrating a communication sequence when monitoring the slave station facility according to the embodiment. In the example shown in FIG. 9, as in FIG. 8, the slave station equipment (30, 32) is the first slave station equipment under the control of the base station (1), and the slave station equipment (31) is the base station (2). 3) shows a case where the second slave station equipment is under the second slave station equipment. It is also assumed that slave station numbers 1, 2, and 3 are assigned to the slave station equipments 30, 31, and 32 in this order. Although n base stations (1-n) are provided, FIG. 9 shows only the base stations 1 and 2 as in FIG. Further, the wireless standard used by the base station 1 and the reception target (slave station) 30 and 32 of the base station 1 is different from the wireless standard used by the base station 2 and the reception target (slave station) 31 of the base station 2. Although it is a wireless standard, the same or nearby frequency band is used. Similarly, the wireless standards used by the base station 1 and the receiving targets (slave stations) 30 and 32 of the base station 1 and the wireless standards used by the base station 2 and the receiving targets (slave stations) 31 of the base station 2 Although the other base station (3 to n) and the wireless standard used by the reception target (slave station equipment) of the base station (3 to n) are different wireless standards, the same or nearby frequency band is used. .

  The operation up to the call signal operation is the same as that in FIG. After the end of the report from the base station 2, a supervisory call for each base station is started.

Step S101: The console 20 transmits a monitoring request to the reception target 30 via the base station 1.
Step S102: The reception target 30 returns a monitoring response to the console 20 via the base station 1.
Step S103: The console 20 transmits a monitoring request to the reception target 32 via the base station 1.
Step S104: The reception target 32 returns a monitoring response to the console 20 via the base station 1.
Step S105: The console 20 transmits a monitoring request to the reception target 31 via the base station 2.
Step S106: The reception target 31 returns a monitoring response to the console 20 via the base station 2.
Thereafter, the monitoring is repeatedly performed by switching the base stations until the monitoring of the reception targets of the base stations 3 to n is completed.
That is, the console 20 starts monitoring and calling the plurality of first slave stations 30 and 32 under the control of the base station 1 after the end of the report to the base station 2 and the plurality of first slave stations. After receiving the monitoring responses from the facilities 30 and 32, a monitoring call is made to the second slave station facility 31 under the control of the base station 2.

  In this way, by starting the monitoring call (monitoring request) for each base station (each subordinate to the base station), it is possible to efficiently monitor the slave station equipment. Therefore, the entire system occupation time can be reduced.

  According to the embodiment, one or more of the following effects can be obtained.

  1) A signal of the same frequency is transmitted, and a plurality of base stations having different communication systems can make a report without interference.

  2) The user can make a report by operating the console once without performing an operation for each base station.

  3) It is possible to efficiently monitor slave station equipment.

  As described above, the invention made by the present inventor has been specifically described based on the embodiment. However, it is needless to say that the present invention is not limited to the above embodiment and can be variously modified.

1, 2: Base station 20: Operation console 30, 31, 32: Child station facility A: Local government staff (user)
B: Resident

Claims (3)

Console and
A first base station;
A second base station having a different communication scheme from the first base station,
The console is configured to report the voice to the first base station and simultaneously record the voice,
The console performs a process of reporting the recorded voice to the second base station after the report to the first base station is completed,
Wireless communication system. In claim 1,
A wireless communication system, wherein a signal transmitted by the first base station and a signal transmitted by the second base station are in the same or nearby frequency bands. In claim 1, further,
A plurality of first slave station facilities under the control of the first base station;
A second slave station facility under the control of the second base station,
The console, after the end of the report to the second base station,
Initiating a supervisory call of said plurality of first slave station facilities;
A wireless communication system for performing a monitoring call of the second slave station facility after receiving monitoring responses from the plurality of first slave station facilities.

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