Wireless communication system

Abstract

To provide a radio communications system capable of designating an individual terminal station as a command target of a simultaneous command and improving convenience.SOLUTION: In a radio communications system, a command table 1 provides a first region 11 and a second region 12 in the region of licensed user information in a telegram of a simultaneous command, and sets a preset individual number difference value in the first region 11, in the second region 12, "1" is set to the bit number of a numerical value obtained by subtracting the individual number difference value from a terminal station number of a terminal station 4 that is the target of the simultaneous command, and sets "0" to the bit number of the numerical value obtained by subtracting the individual number difference value from the terminal station number of the terminal station 4 that is not subject to the simultaneous command, and transmit the simultaneous command.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a wireless communication system, and more particularly to a wireless communication system capable of specifying a command target not only on a group basis but also on a terminal-by-terminal basis in a simultaneous command transmission, thereby improving convenience. [Background technology]

[0002] [Prior art description: Figure 8] Among the wireless communication systems used in disaster prevention systems are those that comply with ARIB-STD T79 and offer a simultaneous command service that sends commands from a control console to multiple terminals simultaneously. A simultaneous command in a conventional wireless communication system will be described with reference to Fig. 8. Fig. 8 is an explanatory diagram showing a simultaneous command in a conventional wireless communication system. As shown in FIG. 8, the wireless communication system includes a command desk 6, a line control device 7, a base station (shown as base station A in the figure) 8, and a plurality of terminal stations 9 (9a, 9b, . . . 9e). Here, the terminal station 9 is assumed to be connected to the base station 8 wirelessly, but may be connected by wire.

[0003] The command console 6 controls the entire wireless communication system, and is a control device that includes a control unit and a transmission / reception unit in addition to an operation unit and a voice input unit. The line control device 7 performs line control. The base station 8 is connected to the line controller 7 by wire and is also connected to the terminal station 9 by wireless for transmission and reception.

[0004] Furthermore, when a simultaneous command is issued, the command desk 6 generates a simultaneous command message and transmits it via the line control device 7. At this time, as shown in FIG. 8, in a conventional wireless communication system, the destination of a simultaneous command is specified on a group basis, and all terminal stations 9 included in the destination group are the targets of the command. In the example of FIG. 8, when group 1 is specified, the terminal stations 9a, 9b, and 9c become destinations, and when group 2 is specified, the terminal stations 9d and 9e become targets of the command.

[0005] Upon receiving the simultaneous command, each terminal station 9 transmits a command reception confirmation response (command reception response) to the command desk 6 . When the command desk 6 receives a command response from a terminal station 9, it stores it, and if there is a terminal station 9 from which it does not receive a command response after a certain period of time has passed (an unreachable terminal station), it resends a simultaneous command to the group that includes that terminal station 9.

[0006] For example, in group 1, even if there is a command response from terminal station 9a, if the command does not reach terminal stations 9b and 9c, the same command will be retransmitted to group 1. Alternatively, when it is desired to transmit only to the terminal stations 9b and 9c to which a signal has not been received, it is necessary to transmit a command to each of the terminal stations 9b and 9c individually, rather than transmitting a command to all the terminal stations at once.

[0007] [Related Technology] Incidentally, a conventional technique relating to simultaneous commands in a wireless communication system is JP 2019-176223 A, “Wireless Communication System” (Patent Document 1). Patent Document 1 describes linking a command system with a mobile wireless communication system. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2019-176223 A Summary of the Invention [Problem to be solved by the invention]

[0009] As described above, in conventional wireless communication systems, the targets of a simultaneous command are specified on a group basis, which means that it is not possible to specify all the unreachable terminal stations as targets of a simultaneous command, which is inconvenient.

[0010] Incidentally, Patent Document 1 does not disclose sending a simultaneous command to individual terminal stations as command targets.

[0011] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a wireless communication system that can improve convenience by allowing individual terminal stations to be designated as targets of a simultaneous command without making major changes to the system. [Means for solving the problem]

[0012] The present invention for solving the problems of the above-mentioned conventional example is a wireless communication system which issues a simultaneous command from a simultaneous command console to terminal stations of a command receiving device, and the simultaneous command console provides a first area and a second area in the licensee user information in the message of the simultaneous command, and a numerical value obtained by adding the bit number of the second area to the bit value indicated in the first area is used as a number for designating a terminal station, and determines whether or not to designate the terminal station having the numerical value obtained by adding the bit number to the bit value as the target of the simultaneous command depending on the bit set in the bit position of the bit number.

[0013] Furthermore, the present invention is characterized in that in the above-mentioned wireless communication system, when the mass command desk sets a bit "1" in the bit position of the bit number, it designates the terminal station whose bit value is obtained by adding that bit number as the target of the mass command, and when it sets a bit "0" in the bit position of the bit number, it does not designate the terminal station whose bit value is obtained by adding that bit number as the target of the mass command.

[0014] Furthermore, the present invention is characterized in that, in the above-mentioned wireless communication system, when a terminal station of the command receiving device receives a mass command from the mass command console, it reads the licensee user information in the message of the mass command, and determines whether or not the terminal station is designated as a command target of the mass command based on the bit value of the first area and the status of the bit set in the bit position of the second area.

[0015] Furthermore, in the wireless communication system of the present invention, the first area of ​​the licensee user information is an area indicating an individual number difference value of terminal stations that are targets of a simultaneous command, and uses 8 bits.

[0016] In addition, the present invention is characterized in that in the wireless communication system, the second area of ​​the licensee user information is an area indicating terminal stations that are targets of a simultaneous command, and uses 952 bits.

[0017] Furthermore, the present invention is characterized in that, in the above-mentioned wireless communication system, if the bit value of the first area of ​​the licensee user information is "0", the terminal station number can be specified as 1 to 952, and if the bit value is "47", the terminal station number can be specified as 48 to 999. Effect of the Invention

[0018] According to the present invention, there is provided a wireless communication system in which a simultaneous command is issued from a simultaneous command stand to terminal stations of receiving devices, in which the simultaneous command stand provides a first area and a second area in the licensee user information in the message of the simultaneous command, and a numerical value obtained by adding the bit number of the second area to the bit value indicated in the first area is used as a number for designating a terminal station, and a wireless communication system in which it is determined whether or not to designate a terminal station having a numerical value obtained by adding the bit number to the bit value as a target of the simultaneous command depending on a bit set in the bit position of the bit number. Therefore, a command can be sent to the desired terminal station as the target of the simultaneous command in a single simultaneous command without sending commands to each terminal station individually, which has the effect of improving convenience.

[0019] Furthermore, according to the present invention, when a terminal station of a command receiving device receives a mass command from the mass command desk, the terminal station reads the licensee user information in the message of the mass command, and determines whether or not the terminal station is designated as a command target of the mass command based on the bit value of the first area and the bit status set in the bit position of the second area in the wireless communication system described above. Therefore, without having to store special information in the terminal station in advance, each terminal station can determine for itself whether or not it is a command target, which has the effect of being realized by simply changing the processing of the command desk and the terminal station. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is an explanatory diagram showing a simultaneous command in the present wireless communication system. [Diagram 2] 3 is an explanatory diagram showing the structure of a message for a general command in the present wireless communication system; FIG. [Diagram 3] FIG. 2 is an explanatory diagram showing the configuration of a first area of ​​licensee user information. [Figure 4] FIG. 11 is an explanatory diagram showing the number (1) of a terminal station represented by a second area. [Diagram 5] FIG. 11 is an explanatory diagram showing the number (2) of a terminal station represented by a second area. [Figure 6] 11 is a flowchart showing the process of the command desk 1 when a simultaneous command is issued. [Figure 7] 13 is a flowchart showing a process of the terminal station 4 when a simultaneous command is received. [Figure 8] FIG. 1 is an explanatory diagram showing a simultaneous command in a conventional wireless communication system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. [Outline of the embodiment] In the wireless communication system according to the embodiment of the present invention (the wireless communication system), the command console provides a first area and a second area in the licensee user information in the message of a simultaneous command, and a value obtained by adding a bit number in the second area to an individual number difference value indicated in the first area is used as a number for specifying a terminal station. When a bit "1" is set in the bit position of the bit number in the second area, the terminal station having the value obtained by adding the bit number to the individual number difference value is specified as a command target of the simultaneous command, and when a bit "0" is set in the bit position of the bit number, the terminal station having the value obtained by adding the bit number to the individual number difference value is not specified as a command target of the simultaneous command. By setting an appropriate individual number difference value in the first area using an existing message of a simultaneous command, it is possible to specify terminal station numbers from 1 to 999 as command targets, and for example, it is possible to resend the simultaneous command by specifying only unreached stations that did not respond to the command confirmation of the simultaneous command as command targets, thereby improving convenience.

[0022] In addition, in this wireless communication system, when a terminal station, which is a device receiving the simultaneous command, receives the simultaneous command, it reads the licensee user information in the message, and if the bit number of the value obtained by subtracting the individual number difference value indicated in the first field from the number of the terminal station in the second field is set to "1", it determines that the terminal station is designated as the target of the simultaneous command, and if the bit number is set to "0", it determines that the terminal station is not designated as the target of the command. This makes it possible for the terminal station to determine whether or not it is the target of the command without having to store any special data, and can be easily implemented.

[0023] [Simultaneous command in this wireless communication system: Figure 1] A simultaneous command in this wireless communication system will be described with reference to Fig. 1. Fig. 1 is an explanatory diagram showing a simultaneous command in this wireless communication system. As shown in Fig. 1, this wireless communication system includes a command console 1, a line control device 2, a base station (shown as base station A in the figure) 3, and terminal stations 4 (4a, 4b, ... 4e). Of these, the line control device 2 and the base station 3 are the same components as in the conventional system, and therefore the description thereof will be omitted. Also, as in the past, the terminal station 4 may be connected to the base station 3 not only wirelessly but also by wire.

[0024] A command console 1 of this wireless communication system is a control device that controls the entire system and includes a control unit, a storage unit, a display unit, an input unit, a voice input unit, a transmission / reception unit, and the like. A feature of this wireless communication system is that when the command desk 1 issues a simultaneous command, it generates a message that specifies not only the group but also the number of the terminal station 4 as the target of the simultaneous command. This makes it possible to specify a particular terminal station 4 in the group and transmit a simultaneous command.

[0025] That is, the command desk 1 of this wireless communication system can transmit a command to a desired terminal station 4 in one message transmission (simultaneous command) without transmitting a message individually to the terminal stations 4 to be commanded.

[0026] Specifically, the control desk 1 uses a specific field in the "licensee specific user-user" message used for the mass command (hereinafter referred to as the mass command message) to specify the terminal station number to be the target of the command. The message of the simultaneous command has a 960-bit free area (licensee user information), and the command desk 1 uses this area to specify the terminal station number of the command target.

[0027] In a wireless communication system, terminal numbers from 1 to 999 can be set, and if the 960-bit free area is simply allocated to each terminal, it is not possible to specify all 999 terminals. However, in reality, it is rare for all numbers from 1 to 999 to be used in a single system, and terminal numbers tend to be concentrated in the first or second half of this range.

[0028] Therefore, in this wireless communication system, the 960 bits of the licensee user information are divided into a first area of ​​8 bits and a second area of ​​952 bits, and by combining the information of the first area and the second area, it is possible to individually designate all terminal stations 4 operating in the system as targets of commands. The operation of the command desk 1 will be described later.

[0029] The terminal station 4 receives the simultaneous command from the command station 1 in the same manner as in the past, but the processing when receiving the simultaneous command telegram is partially different from the conventional one. The terminal station 4 reads the information in the first and second fields of the licensee user information in the telegram and judges for itself whether or not the terminal station is designated as the target of the simultaneous command. If the terminal station 4 is designated as the command target, it acquires and outputs the message contents and sends back a command reception response as in the conventional manner, but if the terminal station 4 is not designated as the command target, it discards the mass command. The operation of the terminal station 4 will be described later.

[0030] [Simultaneous command message in this wireless communication system: Figure 2] Next, the licensee-specific user / user message used in the simultaneous command in this wireless communication system will be explained with reference to Fig. 2. Fig. 2 is an explanatory diagram showing the structure of the message in the simultaneous command in this wireless communication system. A mass command message consists of a maximum of 130 octets. In the example shown in Figure 2, it consists of the 1st octet through the 127th octet. The 7th octet to the 126th octet are the licensee user information field. The licensee user information is optional information for each licensee (manufacturer), and there is no restriction on the contents of the information field.

[0031] In this wireless communication system, the licensee user information is used by dividing it into two areas, the seventh octet and the eighth to 126th octets. The seventh octet is referred to as a first area 11, and the eighth to 126th octets are referred to as a second area 12.

[0032] As shown in Figure 2, in the message of the mass command, the fields other than the licensee user information include the information element identifier, content length, user message type, mass command type, issuing platform number, mass command identification number, and mass command report number, as in the past. The group to which the message is addressed is specified by the mass command type. As a feature of this wireless communication system, information on the individual number difference value is written in the first area 11 of the licensee user information, and information on the terminal stations that are the target of the simultaneous command is written in the second area 12. These pieces of information will be described later.

[0033] [Configuration of the first area: Figure 3] Next, the configuration of the first area 11 of the licensee user information will be described with reference to Fig. 3. Fig. 3 is an explanatory diagram showing the configuration of the first area of ​​the licensee user information. 3, the first area 11 is an area of ​​1 octet (8 bits), and information of an individual number difference value is set in the first area 11. A numerical value from 0 to 255 can be set in the first area 11.

[0034] The individual number difference value is a difference value for calculating the individual number of the terminal station 4 from the bit position of the second area 12, and is set according to the terminal station number operated in the system. As will be described later, the command desk 1 sets "1" in the second field 12 at the bit position obtained by adding the individual number difference value to the terminal number of the terminal station 4 that is the command target of the simultaneous command.

[0035] In this wireless communication system, the individual number difference value is set to "0" or "47", but any number between 0 and 255 may be used as long as it is possible to specify all the numbers of the terminal stations 4 in operation in combination with the information in the second area described below.

[0036] The individual number difference value is set in the storage unit of the command desk 1 by the system operator or the like after the terminal station numbers to be operated in the system are determined. The control unit of the command desk 1 reads the individual number difference value from the storage unit, for example, when the power is turned on, and stores it in memory, and when a mass command is issued, sets the individual number difference value read from the memory in the first area 11 of the mass command message.

[0037] [Configuration of the second area: Figures 4 and 5] Next, the configuration of the second area 12 of the licensee user information will be described with reference to Fig. 4 and Fig. 5. Fig. 4 is an explanatory diagram showing the number (1) of the terminal station represented by the second area, and Fig. 5 is an explanatory diagram showing the number (2) of the terminal station represented by the second area. As described above, the second area 12 of licensee user information is made up of 119 octets and 952 bits.

[0038] Also, although not shown in the figure, in this wireless communication system, for the second area 12, consecutive bit numbers from 1 to 952 are assigned from the 1st bit of the first octet to the 8th bit of the 119th octet, such as the 1st bit, 2nd bit, ..., 8th bit of the first octet, the 1st bit, 2nd bit, ... of the second octet.

[0039] Each bit in the second area 12 corresponds to one terminal station 4, and the value obtained by adding the bit number in the second area 12 to the individual number difference value set in the first area 11 represents the terminal station number. If the bit of the bit number corresponding to the terminal station number is set to "1", that terminal station 4 is the target of the command, and if the bit number corresponding to the terminal station number is set to "0", that terminal station 4 is not the target of the command.

[0040] The example in Figure 4 shows the terminal station numbers that can be specified in the second area 12 when the individual number difference value is "0", and for each of terminal station No. 1 (written as terminal station 1 in the figure) in bit number 1 to terminal station No. 952 (written as terminal station 952 in the figure) in bit number 952, it specifies whether or not the terminal station 4 in question is the target of the command.

[0041] In other words, when the terminal station number of a terminal station 4 operated in a wireless communication system is within the range of 1 to 952, the command desk 1 sets the individual number difference value to "0", sets the terminal station number represented by the second area 12 to the state shown in Figure 4, and sets, for each terminal station 4, whether the bit of the bit number matching the terminal station number is a command target ("1") or not ("0"). In the second area 12, all bits of the bit numbers are set to "0" as a default.

[0042] Moreover, the example in FIG. 5 shows terminal station numbers that can be specified in the second area 12 when the individual number difference value is "47." 5, the first bit of the first octet of bit number 1 represents terminal station No. 48 (shown as terminal station 48 in the figure) with 1+47. Similarly, the eighth bit of the 119th octet of bit number 951 represents terminal station No. 999.

[0043] In other words, if the terminal station number of the terminal station 4 being operated is within the range of 48 to 999, the individual number difference value is set to "47", the terminal station number represented by the second area 12 is set to the state shown in Figure 5, and each terminal station 4 is set as to whether it is a command target or not for each bit.

[0044] In addition, since the terminal station numbers of terminal stations 4 operated in a wireless communication system are often set as consecutive numbers from the beginning (starting from 1) or to the end (up to 999), the individual number difference value in this wireless communication system is set to "0" or "47".

[0045] As a result, in this wireless communication system, the 960-bit free space in the message of the mass command can be used to individually specify whether or not each of the terminal stations 4 operating within the system should be the target of the command. For example, a mass command can be sent to a group in the same manner as in the past, with only the terminal stations 4 that did not respond to the initial mass command as the target of the command, thereby improving convenience.

[0046] [Processing on Command Desk 1: Figure 6] The process of the command desk 1 when a simultaneous command is issued will be described with reference to Fig. 6. Fig. 6 is a flow chart showing the process of the command desk 1 when a simultaneous command is issued. When issuing a simultaneous command, the command desk 1 generates the simultaneous command message shown in Fig. 2. As shown in Fig. 6, the command desk 1 sets the predetermined information shown in Fig. 2 in the message (100), and sets the individual number difference value in the first area 11 (102).

[0047] Then, the number of one of the terminal stations 4 belonging to the group that is the destination of the simultaneous command is read (104), and it is determined whether or not the terminal station 4 is the target of the simultaneous command (106). If the simultaneous command is a retransmission, the terminal station 4 from which the command desk 1 did not receive a command response after the previous simultaneous command transmission is the target of the command. In the process 106, if the terminal station 4 having the read terminal station number is not the command target (No), the command desk 1 returns to the process 104 and reads the number of the next terminal station 4.

[0048] Also, in process 106, if the terminal station 4 is the target of the simultaneous command (YES), the command desk 1 subtracts the individual number difference value from the terminal station number to calculate the bit number corresponding to the terminal station 4 (108). In other words, the bit number is calculated as follows: terminal station number - individual number difference value.

[0049] Then, the command desk 1 sets "1" to the bit position of the calculated bit number in the second area (110). Incidentally, the bit position of the bit number corresponding to the terminal station 4 determined in process 106 not to be the command target remains set to the default "0".

[0050] Then, the command desk 1 judges (112) whether or not it has checked all the terminal stations 4 in the destination group as to whether they are the target of the command, and if it has not finished checking all the terminal stations 4 (No), it moves to process 104 and reads the next terminal station number. If all terminal stations 4 have been checked in step 112 (Yes), the generated simultaneous command message is transmitted (114) and the process ends.

[0051] In this manner, processing is performed on the command desk 1, and commands can be sent to only the desired terminal stations 4 in a single simultaneous command, without the need to send messages to each individual terminal station 4 individually.

[0052] [Processing at terminal station 4: Figure 7] Next, the process of the terminal station 4 when a simultaneous command is received will be described with reference to Fig. 7. Fig. 7 is a flow chart showing the process of the terminal station 4 when a simultaneous command is received. As shown in FIG. 7, when the terminal station 4 receives a simultaneous command (200), it reads a bit value from the first area 11 of the licensee user information in the message of the simultaneous command (202). The bit value read is the individual number difference value.

[0053] Next, the terminal station 4 subtracts the read individual number difference value from its own terminal station number to calculate a bit number (206). Then, the terminal station 4 determines whether the bit set at the bit position of the calculated bit number in the second area 12 of the licensee user information is 1 or 0 (206).

[0054] In process 206, if the bit number in the second area 12 is set to "1", the terminal station 4 determines that it is designated as the target of the command, receives the command (208), transmits a command response to the command desk 1 (220), and ends the process. Also, in process 206, if "0" is set in the bit number in the second area, the terminal station 4 determines that the station itself is not the target of the command, and ends the process. In this manner, the processing in the terminal station 4 is carried out.

[0055] [Effects of the embodiment] According to this wireless communication system, the command console 1 provides a first area 11 and a second area 12 in the area of ​​the licensee user information in the message of the simultaneous command, assigns a bit number of 1 to 952 to each bit in the second area 12, sets a preset individual number difference value in the first area 11, and sets "1" to the bit number of the numerical value obtained by subtracting the individual number difference value from the terminal station number of the terminal station 4 to be the command target of the simultaneous command in the second area 12, and sets "0" to the bit number of the numerical value obtained by subtracting the individual number difference value from the terminal station number of the terminal station 4 not to be the command target of the simultaneous command, and transmits the simultaneous command. By setting an appropriate individual number difference value in the first area 11 using the existing message of the simultaneous command, it is possible to specify the terminal station number of 1 to 999 as the command target. For example, it is possible to specify only the unreachable stations that did not respond to the command confirmation of the simultaneous command as the command target and resend the simultaneous command, and it is possible to send the command only once without sending the command to the unreachable stations individually, which has an effect of improving convenience.

[0056] In addition, according to this wireless communication system, when the terminal station 4, which is a device receiving the simultaneous command, receives the simultaneous command, it reads the licensee user information in the message, and if the bit number of the value obtained by subtracting the individual number difference value indicated by the first area from the number of the terminal station in the second area 12 is set to "1", it determines that the terminal station 4 is designated as the target of the simultaneous command, and if the bit number is set to "0", it determines that the terminal station 4 is not designated as the target of the command. This has the effect of making it possible to determine whether or not the terminal station itself is the target of the command without having to store special data on the terminal station 4 side, and making it easy to implement. [Industrial Applicability]

[0057] The present invention is suitable for a wireless communication system capable of designating individual terminal stations as targets of a simultaneous command and thus improving convenience. [Explanation of symbols]

[0058] 1,6...Command desk; 2,7...Line control device; 3,8...Base station; 4,9...Terminal station; 11...First area; 12...Second area

Claims

1. A wireless communication system in which a command console issues a command to a terminal station of a command receiver, The said mass command platform provides a first area and a second area in the licensee user information in the message of the mass command, a numerical value obtained by adding a bit number of the second area to a bit value indicated by the first area is used as a number for designating the said terminal station, and a determination is made as to whether or not to designate the said terminal station having the numerical value obtained by adding the said bit number to the bit value as a target of the mass command according to a bit set in a bit position of the said bit number.

2. The wireless communication system according to claim 1, characterized in that when the mass command platform sets a bit "1" in the bit position of the bit number, it designates the terminal station whose value is the bit value plus the bit number as the target of the mass command, and when it sets a bit "0" in the bit position of the bit number, it does not designate the terminal station whose value is the bit value plus the bit number as the target of the mass command.

3. A wireless communication system according to claim 1 or 2, characterized in that, when a terminal station of the command receiving device receives a mass command from the mass command console, it reads the licensee user information in the message of the mass command, and determines whether or not the terminal station is designated as a command target of the mass command based on the bit value of the first area and the status of the bit set in the bit position of the second area.

4. 4. The wireless communication system according to claim 1, wherein the first area of ​​said licensee user information is an area indicating a difference value of individual numbers of terminal stations to be subjected to a simultaneous command, and uses 8 bits.

5. 5. The wireless communication system according to claim 1, wherein the second area of ​​said licensee user information is an area for indicating terminal stations to be the object of a simultaneous command, and uses 952 bits.

6. A wireless communication system according to any one of claims 1 to 5, characterized in that if the bit value of the first area of ​​the licensee user information is "0", the terminal station number can be specified as 1 to 952, and if the bit value is "47", the terminal station number can be specified as 48 to 999.

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