JP7159766B2 - Train radio communication system and line control device - Google Patents

Description

The present invention relates to a method of allocating communication lines in a single channel per carrier (SCPC) train radio communication system.

In the conventional SCPC train radio communication system, for the communication line used for voice and data communication, in order to prevent radio interference that occurs when using the same communication line at the same time, within the line section where multiple base stations are installed , a fixed communication line is used for communication between a mobile station mounted on a train and a base station provided on the ground (for example, see Non-Patent Document 1). In other words, a zone for transmitting radio waves is set in association with a line section, multiple base stations are set up within the zone, and within the zone, communication lines are fixedly assigned to mobile stations that wish to perform voice and data communication, and different Radio interference is prevented by not allocating the same communication line to mobile stations that communicate. Here, radio interference refers to the so-called interference phenomenon that occurs in a mobile station that receives radio waves from a plurality of base stations when voice and data information different from radio interference is transmitted from a plurality of base stations on the same frequency. The so-called same-wave interference and beat interference caused by transmitting the same information from a plurality of base stations on the same frequency have already been avoided by applying a plurality of diversity techniques.

Makoto Atsuzawa, Hitoshi Omori, Katsuhiro Yoshida, "Development and introduction of conventional line train radio system", [online], JR EAST Technical Review-No.20-Summer 2007, JR East, [Retrieved May 16, 2018 ], Internet <URL: https://www.jreast.co.jp/development/tech/pdf_20/Tech-20-62-66.pdf>

In such a conventional system, when an area configuration similar to a so-called cellular system is used in which a zone is divided into a plurality of areas corresponding to each of a plurality of base stations, radio interference does not occur between distant areas. It is possible to However, even when mobile stations are located in different areas, the same communication line is not assigned to each mobile station, so it cannot be said that the communication line is effectively utilized.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a communication line for effectively utilizing available communication lines among communication lines used in base stations that do not cause radio interference. An object of the present invention is to provide a train radio communication system to which an allocation method is applied.

A train radio communication system according to the present invention includes a base station provided for each area covering zones divided into at least three areas as a radio communication area, and mounted on each of a plurality of trains moving through the zones, a mobile station capable of communicating with a base station through a plurality of communication lines having different frequency bands, and outputting a communication request for using at least one of the plurality of communication lines; and a mobile station via the base station. A train radio communication system comprising an information communication device for communicating information, a line control device for controlling a communication line, and a central device for controlling the base station, the mobile station, the information communication device and the line control device, The line control device stores an external input storage unit in which current location information of a plurality of trains is input from the outside and stored, and the current usage status of all communication lines between the base station and the mobile station. Allocation to the area where the mobile station outputting the communication request exists and the adjacent area based on the communication line storage unit, the communication request, the current location information of the multiple trains, and the current usage status of all the communication lines. an allocation control unit for allocating the same communication line to the mobile station that outputs the communication request when there is no mobile station to which the same communication line as the communication line to be attempted exists.

In the train radio communication system according to the present invention, it is possible to allocate the same communication line to mobile stations located in each area formed by base stations that do not cause radio interference within the zone, and effectively utilize the communication line. can be done.

1 is a diagram showing an example of a railway zone including a train radio communication system according to Embodiment 1 of the present invention; FIG. FIG. 2 is an example of a functional block diagram relating to a line control device included in the train radio communication system according to Embodiment 1 of the present invention; 4 is an example of a flow chart of processing of the line control device according to the first embodiment of the present invention; This is an example of a diagram in which a voice/data line f1 is used in area C. FIG. This is an example of a diagram in which a mobile station in area A issues a communication request using a control line f0. FIG. 10 is an example of a diagram in which a mobile station in area A receives a control command for a communication request using a control line f0. This is an example of a diagram in which voice/data lines f2 and f1 are used in areas A and C, respectively. FIG. 10 is another example of a diagram in which a mobile station in area A outputs a communication request using a control line f0; It is an example of a diagram in which a mobile station in area A receives a control command using a control line f0. In this example, area A uses voice/data lines f1 and f2, and area C uses voice/data line f1. This is an example of a diagram in which a mobile station in area B outputs a communication request using a control line f0. It is an example of a diagram in which a mobile station in area B receives a control command using a control line f0. FIG. 5 is a diagram showing an example of a railroad zone including a train radio communication system according to a second embodiment of the present invention; FIG. 10 is an example of a functional block diagram relating to a line control device possessed by a train radio communication system according to Embodiment 2 of the present invention; FIG. 10 is an example of a flow chart of processing of a line control device according to Embodiment 2 of the present invention; FIG. This is an example of a diagram in which call/data lines f1 and f2 are used in area C. FIG. FIG. 10 is another example of a diagram in which a mobile station in area A outputs a communication request using a control line f0; FIG. 10 is another example of a diagram in which a mobile station receives a control command using a control line f0 in area A; This is an example of a diagram in which voice/data lines f1 and f2 are used in areas A and C, respectively. In this diagram, an area A uses a voice/data line f1, and an area C uses voice/data lines f1 and f2. In this figure, one mobile station in area A is using the voice/data line f1, while the other mobile station is outputting a communication request using the control line f0. In this figure, one mobile station is using the communication/data line f1 in area A, while the other mobile station is receiving a control command using the control line f0. An example of a diagram in which one mobile station uses a voice/data line f1 in area A, the other mobile station uses voice/data line f2, and area C uses voice/data lines f1 and f2. is. This is an example of a diagram in which a mobile station in area B outputs a communication request using a control line f0. It is an example of a diagram in which a mobile station in area B receives a control command using a control line f0.

Embodiment 1.
A train radio communication system that is Embodiment 1 of the present invention will be described. FIG. 1 shows an example of a railway zone having a train radio communication system according to Embodiment 1 of the present invention.

The train radio communication system according to the present embodiment excluding the tracks and the trains 2, 4, 7, and 10, which are the main bodies of the trains, within the range R1 surrounded by the dotted line shown in FIG. , 7 and 10, base stations 5, 8 and 11, a line control unit 12a, a central unit 13, a command console 14 and a data server 15. A command console 14 and a data server 15 as information communication devices can communicate voice and data with the mobile stations 1, 3, 6 and 9, respectively.
Also, the central unit 13 of the train radio communication system of the present embodiment is connected to, for example, an operation management system 16, which serves to transmit on-track location information and traveling route information of the mobile stations 1, 3, 6, and 9. ing.

The mobile station 1 and the base station 5, the mobile station 3 and the base station 5, the mobile station 6 and the base station 8, and the mobile station 9 and the base station 11 can be connected by wireless communication lines, and the command console can be connected. 14 and data server 15 and each mobile station 1, 3, 6, 9 can perform two-way communication of voice or data. Communication between mobile stations 1, 3, 6, 9 and base stations 5, 8, 11 is possible through a plurality of communication lines with different frequency bands.

Rail zones are demarcated by areas for coverage as radio coverage. Each area is provided with one base station. Communication is possible even if there are a plurality of mobile stations in each area. Also, the railroad zone is divided into at least three areas.
In FIG. 1, an area A is provided with a base station 5 . Similarly, in area B, a base station 8 is provided. A base station 11 is provided in area C. FIG.

The line control device 12a acquires on-track position information and traveling route information of the mobile stations 1, 3, 6, and 9 from the operation management system 16 via the central device 13, and the command desk 14 and data server 15 and the mobile stations 1, 3, 6, and 9 control allocation of communication lines according to communication requests.
In this example, the communication lines to be assigned are two lines of voice/data lines f1 and f2. The call/data lines f1 and f2 are communication lines for two-way communication of voice or data. The control line f0 is a communication line common to all areas, and is a communication line for communicating information for controlling how to allocate the call/data lines f1 and f2 to the mobile stations 1, 3, 6 and 9. be.
The details of the line control device 12a will be described later.

FIG. 2 is a functional block diagram of the line control device 12a according to Embodiment 1 of the present invention.
As shown in FIG. 2, the line control device 12a is composed of an allocation control section 17a, an external input storage section 18 and a communication line storage section 19. As shown in FIG.

The external input storage unit 18 receives external information 181 from the operation management system 16 via the central device 13 . Here, the external information 181 is the current location information of the trains 2, 4, 7, and 10 on which the mobile stations 1, 3, 6, and 9 are installed, and It is travel route information of each train 2, 4, 7, and 10, and information representing the radio interference range of each of areas A, B, and C. FIG. Since the latest train location information is sequentially input to the external input storage unit 18, the current location information of each train 2, 4, 7, 10 is stored. When the operation management system 16 changes the running routes of the trains 2, 4, 7, and 10, the external input storage unit 18 receives the updated running route information after the change. 4, 7, and 10 latest travel route information is stored.

The communication line storage unit 19 stores the usage status of the call/data lines f1 and f2 between the mobile stations 1, 3, 6 and 9 and the base stations 5, 8 and 11 as communication line information 191. there is The communication line storage unit 19 is updated by inputting the communication line update information 192 of the communication/data lines f1 and f2 when the usage status of the communication/data lines f1 and f2 is changed. Therefore, the communication line storage unit 19 keeps track of the latest current usage status at any time.

Next, the allocation control section 17a will be described. When a communication request 171a is output from any one of mobile stations 1, 3, 6, and 9 using control line f0, allocation control section 17a receives one of base stations 5, 8, and 11 in the same area. And this communication request 171a is input via the central unit 13. FIG. Also, the external information 181 stored in the external input storage unit 18 is input to the allocation control unit 17a. Furthermore, communication line information 191 stored in the communication line storage section 19 is input to the allocation control section 17a. Based on the input 171a, the external information 181 and the communication line information 191, the allocation control unit 17a outputs a control instruction 172a for allocating the call/data lines f1 and f2. The output control instruction 172a is transmitted to the mobile station that output the communication request 171a via the central unit 13 and the base station using the control line f0.
The details of the process of allocating the call/data lines f1 and f2 will be described in detail below with reference to flowcharts.

Next, FIG. 3 is a flow chart showing an example of processing of the line control device 12a.
Based on the steps of the flow chart of FIG. 3, each case will be explained with appropriate figures.

First, in describing the processing of the line control device 12a, an example of the use condition of the communication line, which is a prerequisite for the processing of using the unused line, will be described.
FIG. 4 shows an example of the usage of the communication line at step S0 of the start of the flow chart of FIG. As shown in FIG. 4, it is assumed that mobile station 9 belonging to area C communicates with command console 14 via base station 11 using voice/data line f1. It is assumed that none of mobile stations 1, 3, and 6, which are other mobile stations, are communicating.

Next, assume that one of the mobile stations newly outputs a communication request 171a to the line controller 12a using the control line f0. Here, as shown in FIG. 5, it is assumed that the mobile station 1 outputs a new communication request 171a with the control console 14 using the control line f0.
In step S1, the line controller 12a determines whether or not there is a new communication request 171a from any of the mobile stations. In this example, since there is a new communication request 171a for communicating with the command console 14 from the mobile station 1, the process proceeds to step S2.

In step S2, when the line controller 12a receives the communication request 171a, it uses the external information 181 and the communication line information 191 to determine whether or not there is an unused line. In this case, as shown in FIG. 5, only the mobile station 9 belonging to area C is using the voice/data line f1. Then, go to step S3.

Next, in step S3, the line controller 12a outputs a control instruction 172a for allocating an unused line using the control line f0 to the mobile station that has output the communication request 171a. Here, as shown in FIG. 6, the line controller 12a instructs the mobile station 1 to use the communication/data line f2, which is an unused line, via the base station 5 and the central unit 13 using the control line f0. It outputs a control instruction 172a. As a result, the communication/data line f2 is allocated between the mobile station 1 and the base station 5. FIG.

FIG. 7 shows the usage status of the communication line as a result of termination in step S8. A mobile station 9 belonging to area C communicates with a command console 14 via a base station 11 and a central unit 13 using a call/data line f1, and a mobile station 1 belonging to area A uses a call/data line f2. It is in a state of communicating with the command console 14 via the base station 5 and the central unit 13 .

Next, another example of the communication line usage condition, which is a premise leading to the process of allocating a communication line out of the radio interference range where there is no unused line, will be described.
FIG. 7 shows another example of the usage of the communication line at step S0 of the start of the flow chart of FIG. As shown in FIG. 7, it is assumed that mobile station 1 belonging to area A communicates with command console 14 via base station 5 using voice/data line f2. It is also assumed that mobile station 9 belonging to area C communicates with command console 14 via base station 11 using voice/data line f1.

Next, assume that one of the mobile stations newly outputs a communication request 171a to the line controller 12a using the control line f0. Here, as shown in FIG. 8, it is assumed that the mobile station 3 outputs a new communication request 171a with the control console 14 using the control line f0.
In step S1, the line controller 12a determines whether or not there is a new communication request 171a from any of the mobile stations. In this other example, since there is a new communication request 171a for communicating with the command desk 14 from the mobile station 3, the process proceeds to step S2.

Then, in step S2, when the line control device 12a receives the communication request 171a, it determines based on the external information 181 and the communication line information 191 whether or not there is an unused line. Here, as shown in FIG. 8, mobile station 1 belonging to area A uses voice/data line f2, and mobile station 9 belonging to area C uses voice/data line f1. Therefore, the line controller 12a determines that there is no unused line, and proceeds to step S4.

Next, in step S4, the line control device 12a determines whether or not there is an allocatable communication line outside the radio interference range. If the communication line is used in an area that is not adjacent to the area to which the mobile station outputting the communication request 171a belongs, the line control device 12a determines that the line is outside the radio interference range. Here, as shown in FIG. 8, the area C to which the mobile station 9 belongs is not adjacent to the area A to which the mobile station 3 outputting the communication request 171a belongs, and is outside the radio interference range. Therefore, the line controller 12a determines that the call/data line f1 used by the mobile station 9 is outside the radio interference range and is an allocatable communication line, and proceeds to step S5.
If there is no allocatable communication line outside the wireless interference range, the process proceeds from step S4 to step S7. Step S7 will be described later.

Subsequently, in step S5, the line control device 12a determines future routes based on the on-rail position information and the traveling route information of each of the mobile station that was determined to be out of the radio interference range in step S4 and the mobile station that is outputting the communication request 171a. Determine whether or not there is radio interference. Here, as shown in FIG. 8, the on-line position information and traveling route information of the mobile station 9 which was determined to be an allocatable communication line in step S4 and the mobile station 3 outputting the communication request 171a are confirmed. Determine whether or not there is radio interference.
In FIG. 8, the mobile station 9 and the mobile station 3 are traveling in the same traveling direction, facing right, so the line controller 12a determines that the mobile station 9 and the mobile station 3 will not interfere with each other in the future, and step S6. proceed to
If the vehicles are traveling in directions facing each other, there is a possibility that they will approach or pass each other in the future, so it is determined that there will be radio interference, and the process proceeds from step S5 to step S7.

Next, in step S6, the line controller 12a uses the control line f0 to output a control instruction 172a for allocating an allocatable communication line outside the radio interference range to the mobile station that has output the communication request 171a. Here, as shown in FIG. 9, in step S6, the line control unit 12a controls the control instruction 172a to use the call/data line f1, which is the line to be used outside the radio interference range, via the base station 5 and the central unit 13. It outputs to the mobile station 3 using the communication line f0. As a result, the communication/data line f1 is allocated between the mobile station 3 and the base station 5. FIG.

FIG. 10 shows the usage status of the communication line as a result of termination in step S8. A mobile station 9 belonging to area C communicates with a command console 14 via a base station 11 and a central unit 13 using a communication/data line f1. A mobile station 1 belonging to area A communicates with a command console 14 via a base station 5 and a central unit 13 using a communication/data line f2. Also, the mobile station 3 belonging to area A communicates with the control console 14 via the base station 5 and the central unit 13 using the communication/data line f1.

After determining in step S4 whether or not there is an allocatable communication line outside the radio interference range when the communication request 171a is received, in step S5 it is determined whether or not radio interference will occur in the future, thereby making the communication line more precise. However, step S5 may be omitted if precise allocation is not required, just by allocating communication lines based on the communication state at the time of receiving the communication request 171a.

Next, still another example of the communication line usage condition, which is a premise for the process when there are no unused lines and no communication lines outside the range of radio interference and no allocatable communication lines, will be described.
FIG. 10 shows still another example of the usage of the communication line at step S0 of the start of the flow chart of FIG. As shown in FIG. 10, it is assumed that mobile station 1 belonging to area A communicates with command console 14 via base station 5 and central unit 13 using call/data line f2. It is assumed that mobile station 3 belonging to area A communicates with command console 14 via base station 5 and central unit 13 using voice/data line f1. Also, it is assumed that mobile station 9 belonging to area C communicates with command console 14 via base station 11 and central unit 13 using voice/data line f1.

Next, assume that one of the mobile stations newly outputs a communication request 171a to the line controller 12a using the control line f0. Here, as shown in FIG. 11, it is assumed that the mobile station 6 outputs a new communication request 171a with the command console 14 using the control line f0.
In step S1, the line controller 12a determines whether or not there is a new communication request 171a from any of the mobile stations. In this still another example, there is a new communication request 171a for communicating with the command console 14 from the mobile station 6, so the process proceeds to step S2.

Subsequently, in step S2, when the line control device 12a receives the communication request 171a, it determines based on the external information 181 and the communication line information 191 whether or not there is an unused line. Here, as shown in FIG. 11, mobile stations 1 and 3 belonging to area A use speech/data lines f2 and f1, respectively, and mobile station 9 belonging to area C uses speech/data line f1. Therefore, it is determined that there is no unused line, and the process proceeds to step S4.

Next, in step S4, the line controller 12a determines whether or not there is an allocatable communication line outside the radio interference range. Here, as shown in FIG. 11, the area B to which the mobile station 6 outputting the communication request 171a belongs is adjacent to the area A to which the mobile stations 1 and 3 belong, and radio interference is considered to occur. In addition, since the area C to which the mobile station 9 belongs is also adjacent, radio interference is considered to occur.
Therefore, it is determined that there is no allocatable communication line outside the radio interference range, and the process proceeds to step S7.

In step S7, the line controller 12a outputs a control instruction 172a indicating that there is no allocatable communication line to the mobile station that has output the communication request 171a, using the control line f0. Here, as shown in FIG. 12, the line controller 12a sends a control instruction 172a to the mobile station 6 via the control line f0, the base station 8 and the central unit 13 to indicate that there is no allocatable communication line. Output. As a result, mobile station 6 is not assigned any communication link.

Since there is no allocatable communication line and no communication line has been allocated, the state of the communication line resulting from termination in step S8 is the same as the state of use of the communication line at step S0 at the start of the flow chart of FIG. The situation remains unchanged. Here, the usage status of the communication line at the start step S0 shown in FIG. 10 is shown.

In Embodiment 1 of the present invention, the line control device 12a is provided as a separate device from the central device 13, but the function of the line control device 12a is implemented in the central device 13 as a part of the function of the central device 13. You may

In Embodiment 1 of the present invention, the method of allocating the same communication line has been described assuming that allocation is possible outside the radio interference range. As a result, it is now possible to allocate communication lines that do not cause radio interference, even if they are in use within the railway zone, making it possible to use communication lines effectively and efficiently. The effect of improving the properties can be obtained.

Embodiment 2.
In Embodiment 1, each of a plurality of mobile stations in the same area uses one communication line.

The difference between Embodiment 2 and Embodiment 1 is that one mobile station can use not only one communication line but also a plurality of communication lines. In the following, only differences from Embodiment 1 will be described, and descriptions of the same or corresponding parts will be omitted. As for the reference numerals, the same reference numerals are used for the same or corresponding portions as those in the first embodiment, and the description thereof will be omitted.

A train radio communication system that is Embodiment 2 of the present invention will be described. FIG. 13 shows an example of a railway zone having a train radio communication system according to Embodiment 2 of the present invention.
In FIG. 13, the difference from Embodiment 1 is that it is a train radio communication system having a line control device 12b. That is, the train radio communication system according to the present embodiment excluding the tracks and the trains 2, 4, 7, and 10, which are the train bodies, within the range R2 surrounded by the dotted line shown in FIG. It consists of stations 1, 3, 6 and 9, base stations 5, 8 and 11, a line control device 12b, a central device 13, a command console 14 and a data server 15.
The details of the line control device 12b, which is a feature of the second embodiment, will be described later.

FIG. 14 is a functional block diagram of line control device 12b according to Embodiment 2 of the present invention.
As shown in FIG. 14, the line control device 12b is composed of an allocation control section 17b, an external input storage section 18, a communication line storage section 19, a calculation section 20 and a communication capacity storage section 21. FIG.

The communication capacity storage unit 21 stores communication capacity information 211 that is information about the communication capacity of the call/data lines f1 and f2.
Upon receiving the communication request 171b output from any one of the mobile stations 1, 3, 6, and 9, the communication capacity storage unit 21 transmits the communication capacity information 211 corresponding to the communication request 171b to the calculation unit 20. FIG. In addition to the communication line allocation request, the communication request 171b according to the second embodiment also includes the value of the communication capacity required by the mobile station that outputs the communication request 171b.

The calculation unit 20 calculates the requested number of lines 201 based on the communication request 171b output from any one of the mobile stations 1, 3, 6, and 9. FIG.
Upon receiving the communication request 171b, the calculation unit 20 transmits the communication request 171b to the communication capacity storage unit 21 . Based on the communication capacity information 211 received from the communication capacity storage unit 21, the number of requested lines 201 corresponding to the communication request 171b is calculated.

When a communication request 171b is output from any of the mobile stations 1, 3, 6, and 9, the allocation control unit 17b selects the control line f0, the base stations 5, 8, and 11 in the same area and the central unit. 13, a communication request 171b is input. When the communication request 171b is input, the allocation control unit 17b outputs the communication request 171b to the calculation unit 20. FIG.
The external information 181 stored in the external input storage unit 18 and the communication line information 191 stored in the communication line storage unit 19 are input to the allocation control unit 17b. Further, the number of requested lines 201 corresponding to the communication request 171b calculated by the calculation unit 20 is input to the allocation control unit 17b.
The allocation control unit 17b allocates the call/data lines f1 and f2 based on the communication request 171b, the external information 181, the communication line information 191, and the requested number of lines 201. FIG. The allocation result is output as a control instruction 172b to the mobile station that output the communication request 171b using the control line f0.
Details of the process of allocating the call/data lines f1 and f2 will be described in detail below with reference to flowcharts.

FIG. 15 is a flow chart showing an example of the processing of the line control device 12b.
Based on the steps of the flow chart of FIG. 15, each case will be explained with appropriate figures.

First, in describing the processing of the line control device 12b, an example of the usage status of communication lines will be described, which is a premise for the process of allocating a communication line out of the range of wireless interference where there is no unused line.
FIG. 16 shows an example of the usage status of the communication line at step S10 at the start of the flow chart of FIG. As shown in FIG. 16, mobile station 9 belonging to area C communicates with command console 14 and data server 15 via base station 11 and central unit 13 using call/data lines f1 and f2. do. It is assumed that none of mobile stations 1, 3, and 6, which are other mobile stations, are communicating.

Next, it is assumed that one of the mobile stations newly outputs a communication request 171b to the line controller 12b using the control line f0. Here, as shown in FIG. 17, it is assumed that the mobile station 1 outputs a new communication request 171b with the control console 14 using the control line f0.
At step S11, the line controller 12b determines whether or not there is a new communication request 171b from any of the mobile stations. In this example, since there is a new communication request 171b from the mobile station 1 to the command console 14, the process proceeds to step S12.

In step S12, when the line control device 12b receives the communication request 171b, the requested number of communication lines 201 corresponding to the content of the communication request 171b is stored in the communication capacity information 211 transmitted from the communication capacity storage unit 21 and the communication request 171b. is calculated using the value of the communication capacity required by the mobile station added to . Here, as shown in FIG. 17, when receiving the communication request 171b, the line controller 12b uses the communication capacity information 211 and the value of the communication capacity required by the mobile station 1 added to the communication request 171b to perform communication. The number of requested lines 201 corresponding to the request 171b is calculated as, for example, two lines.

Next, in step S13, the line controller 12b uses the external information 181 and the communication line information 191 to determine whether there is an unused line that satisfies the required number of lines 201 or not.
Here, as shown in FIG. 17, mobile station 9 belonging to area C uses voice/data line f1 and voice/data line f2, so it is determined that there is no unused line, and the process proceeds to step S15.
If there is an unused line that satisfies the required number of lines 201, the process proceeds from step S13 to step S14 to allocate an unused line.

In step S15, the line control device 12b determines whether or not there is a communication line that can be allocated outside the radio interference range that satisfies the required number of lines 201 or not. Here, as shown in FIG. 17, the area C to which the mobile station 9 belongs is not adjacent to the area A to which the mobile station 1 issuing the communication request 171b belongs, and is outside the radio interference range.
Therefore, the line controller 12b determines that the two lines of the voice/data lines f1 and f2 are outside the radio interference range and are allocatable communication lines, and proceeds to step S16.
If there is no allocatable communication line outside the wireless interference range that satisfies the required number of lines 201, the process proceeds from step S15 to step S18. Step S18 will be described later.

Subsequently, in step S16, the line control device 12b confirms the on-line location information and travel route information of the mobile station outputting the communication request 171b and the mobile station determined to be out of the radio interference range. It is determined whether or not the mobile station determined to be out of the radio interference range will cause radio interference in the future.
Here, as shown in FIG. 17, mobile station 9 and mobile station 1 are traveling in the same traveling direction to the right, so it is determined that there will be no radio interference from now on, and the process proceeds to step S17.
If the two vehicles are traveling in directions facing each other, there is a possibility that they will approach each other or pass each other in the future. Step S18 will be described later.

Next, in step S17, the line controller 12b outputs a control instruction 172b for allocating an allocatable communication line outside the radio interference range using the control line f0.
Here, as shown in FIG. 18, the line controller 12b outputs a control instruction 172b using the control line f0 to use the communication/data lines f1 and f2 so as not to interfere with the mobile station 1 in the future. As a result, communication/data lines f1 and f2 are allocated between the mobile station 1 and the base station 5. FIG.

FIG. 19 shows the usage status of the communication line as a result of completing step S21. A mobile station 9 belonging to area C communicates with a command console 14 and a data server 15 via a base station 11 and a central unit 13 using call/data lines f1 and f2. It is in a state of communicating with command console 14 and data server 15 via base station 5 and central unit 13 using data lines f1 and f2.

Next, another example of the use of communication lines, which is a prerequisite for the process of allocating only the allocatable communication lines that are insufficient for the required number of lines 201, will be described.
FIG. 20 shows another example of the usage of the communication line at step S10 at the start of the flow chart of FIG. As shown in FIG. 20, mobile station 1 communicates with command console 14 via base station 5 and central unit 13 using voice/data line f1. It is assumed that mobile station 9 communicates with command desk 14 or data server 15 via base station 11 and central unit 13 using communication/data lines f1 and f2. It is assumed that mobile stations 3 and 6 are not communicating.

Next, assume that one of the mobile stations outputs a new communication request 171b to the line controller 12b using the control line f0. Here, as shown in FIG. 21, it is assumed that the mobile station 3 outputs a new communication request 171b with the command console 14 using the control line f0.
At step S11, the line controller 12b determines whether or not there is a new communication request 171b from any of the mobile stations. In this other example, since there is a new communication request 171b from the mobile station 3 to the command console 14, the process proceeds to step S12.

In step S12, when the line control device 12b receives the communication request 171b, the communication capacity information 211 and the mobile station added to the communication request 171b require the requested number of communication lines 201 corresponding to the contents of the communication request 171b. It is calculated using the value of communication capacity. Here, as shown in FIG. 21, when the line controller 12b receives the communication request 171b, it uses the communication capacity information 211 and the value of the communication capacity required by the mobile station 3 added to the communication request 171b to The number of requested lines 201 corresponding to the communication request 171b is calculated as, for example, two lines.

Next, in step S13, the line controller 12b uses the external information 181 and the communication line information 191 to determine whether or not there is an unused line that satisfies the required number of lines 201. FIG.
Here, as shown in FIG. 21, the line control device 12b indicates that the mobile station 9 belonging to the area C uses the communication/data lines f1 and f2, and the mobile station 1 belonging to the area A uses the communication/data line f1. Since it is in use, it is determined that there is no unused line, and the process proceeds to step S15.
If there is an unused line that satisfies the required number of lines 201, the process proceeds from step S13 to step S14 to allocate an unused line.

Subsequently, in step S15, the line control device 12b determines whether or not there is a communication line that can be allocated outside the radio interference range that satisfies the required number of lines 201 or not. Here, as shown in FIG. 21, the area C to which the mobile station 9 belongs is not adjacent to the area A to which the mobile station 3 outputting the communication request 171b belongs, and is outside the radio interference range. Also, since the mobile station 1 belonging to the same area A as the mobile station 3 outputting the communication request 171b is using the communication/data line f1, the mobile station 3 is on the same communication line as the mobile station 1. will cause radio interference.
Therefore, the line controller 12b determines that the mobile station 1 causing radio interference is using the communication/data line f1 among the communication/data lines f1 and f2 used by the mobile station 9 outside the radio interference range. Therefore, it is determined that there is no allocatable communication line that satisfies the required number of lines 201 of two lines, and the process proceeds to step S18.

Subsequently, in step S18, the line controller 12b determines whether or not there is a communication line that can be allocated but does not meet the required number of lines 201. FIG. Here, as shown in FIG. 21, of the voice/data lines f1 and f2 used by the mobile station 9 outside the radio interference range, the mobile station 1 is using the voice/data line f1. call/data line f2 can be assigned. Therefore, it is determined that there is an allocatable communication line, and the process proceeds to step S19.
If it is determined that there is no allocatable communication line, the process proceeds from step S18 to step S20.

In step S19, the line controller 12b outputs a control instruction 172b to allocate all allocatable communication lines using the control line f0 to the mobile station that has output the communication request 171b. Here, as shown in FIG. 22, a control instruction 172b is output to the mobile station 3 using the control line f0 so as to use the call/data line f2 as the allocatable communication line. As a result, the communication/data line f2 is allocated between the mobile station 3 and the base station 5. FIG.

FIG. 23 shows the usage status of the communication line as a result of completing step S21. A mobile station 9 belonging to area C communicates with command console 14 and data server 15 via base station 11 and central unit 13 using call/data lines f1 and f2. Mobile station 1 belonging to area A communicates with command console 14 via base station 5 and central unit 13 using voice/data line f1. Also, the mobile station 3 belonging to the area A is communicating with the control console 14 via the base station 5 and the central unit 13 using the communication/data line f2.

Next, still another example of the usage status of communication lines, which is a premise leading to a process in which there are no unused lines and no communication lines outside the range of radio interference and no allocatable communication lines, will be described.
FIG. 23 shows yet another example of the usage status of the communication line at step S0 of the start of the flow chart of FIG. As shown in FIG. 23, mobile station 1 belonging to area A communicates with command console 14 or data server 15 via base station 5 and central unit 13 using voice/data line f1. A mobile station 3 belonging to area A communicates with a command console 14 via a base station 5 and a central unit 13 using a communication/data line f2. A mobile station 9 belonging to area C communicates with a command console 14 or a data server 15 via a base station 11 and a central unit 13 using communication/data lines f1 and f2.

Next, assume that one of the mobile stations outputs a new communication request 171b to the line controller 12b using the control line f0. Here, as shown in FIG. 24, it is assumed that the mobile station 6 outputs a new communication request 171b with the command console 14 using the control line f0.
At step S11, the line controller 12b determines whether or not there is a new communication request 171b from any of the mobile stations. In this still another example, since there is a communication request 171b from the mobile station 6, the process proceeds to step S12.

In step S12, when the line control device 12b receives the communication request 171b, the communication capacity information 211 and the mobile station added to the communication request 171b require the requested number of communication lines 201 corresponding to the contents of the communication request 171b. It is calculated using the value of communication capacity. Here, as shown in FIG. 24, when receiving the communication request 171b, the line controller 12b uses the communication capacity information 211 and the value of the communication capacity required by the mobile station 6 added to the communication request 171b to The number of requested lines 201 corresponding to the communication request 171b is calculated as, for example, two lines.

Next, in step S13, the line controller 12b uses the external information 181 and the communication line information 191 to determine whether or not there is an unused line that satisfies the required number of lines 201. FIG.
Here, as shown in FIG. 24, mobile station 9 belonging to area C uses voice/data lines f1 and f2, and mobile stations 1 and 3 belonging to area A use voice/data lines f1 and f2, respectively. Therefore, it is determined that there is no unused line, and the process proceeds to step S15.
If it is determined that there is an unused line that satisfies the required number of lines 201, the process proceeds from step S13 to step S14, and the unused line is assigned.

Subsequently, in step S15, the line controller 12b determines whether or not there is an allocatable communication line that satisfies the required number of lines 201 outside the radio interference range. Here, as shown in FIG. 24, area C to which mobile station 9 belongs is adjacent to area B to which mobile station 6 outputting communication request 171b belongs, and radio interference occurs. Similarly, area A to which mobile stations 1 and 3 belong is adjacent to area B to which mobile station 6 outputting communication request 171b belongs, and radio interference occurs.
Therefore, since there is no non-adjacent area, the line controller 12b determines that there is no allocatable communication line that satisfies the required number of lines 201 outside the radio interference range, and proceeds to step S18.
Note that if there is a communication line that can be assigned and that satisfies the required number of lines 201 outside the radio interference range, the process proceeds to step S16.

In step S18, the line control device 12b determines whether or not there is a communication line that can be assigned but is less than the required number of lines 201 or not. Here, as shown in FIG. 24, since there are neither allocable communication lines nor unused lines outside the wireless interference range, it is determined that there are no allocatable communication lines, and the process proceeds to step S20.

In step S20, the line controller 12b outputs a control instruction 172b to the mobile station issuing the communication request 171b indicating that there is no communication line that can be assigned using the control line f0. Here, as shown in FIG. 25, a control instruction 172b indicating that there is no communicable communication line is output to the mobile station 6 via the control line f0, the base station 8 and the central unit 13. FIG. As a result, mobile station 6 is not assigned any communication link.

Since there is no allocatable communication line and no communication line has been allocated, the state of the communication line resulting from termination in step S21 is the same as the state of use of the communication line at step S10 of the start of the flow chart of FIG. The situation remains unchanged. Here, the usage status of the communication line at the start step S0 shown in FIG. 23 is shown.

In Embodiment 2 of the present invention, the line control device 12b is provided as a separate device from the central device 13, but the function of the line control device 12b is implemented in the central device 13 as a part of the function of the central device 13. You may

Embodiment 2 of the present invention has described the method of allocating the same communication line outside the radio interference range. As a result, it is now possible to allocate communication lines that do not cause radio interference, even if they are in use within the railway zone, making it possible to use communication lines effectively and efficiently. The effect of improving the properties can be obtained.

In addition, since it is possible to use a plurality of communication lines, it is possible to increase the communication capacity of each user, leading to improved user convenience.

In this embodiment, the number of allocatable lines is two, but the number of lines may be increased.

1, 3, 6, 9 mobile station 2, 4, 7, 10 train 5, 8, 11 base station 12a, 12b line control device 13 central device 14 command console 15 data server 16 operation management system 17a, 17b assignment control unit 171a , 171b communication request 172a, 172b control instruction 181 external information 191 communication line information 192 communication line update information 201 requested number of lines 211 communication capacity information 191 communication line information 192 communication line update information 18 external input storage unit 19 communication line storage unit 20 calculation Part 21 Communication capacity storage part

Claims (8)

a base station provided for each area that covers a zone divided into at least three areas as a wireless communication area;
mounted on each of the plurality of trains moving in the zone, capable of communicating with the base station through a plurality of communication lines having different frequency bands, and communicating for using any one of the plurality of communication lines a mobile station that outputs a request;
an information communication device that communicates information with the mobile station via the base station;
a line control device for controlling the communication line;
a central device that controls the base station, the mobile station, the information communication device, and the line control device;
A train radio communication system comprising:
The line control device
an external input storage unit for inputting and storing information on location of trains of the plurality of trains from the outside;
a communication line storage unit that stores usage statuses of the plurality of communication lines between the base station and the mobile station;
a communication line to be allocated to an area adjacent to the area in which the mobile station outputting the communication request resides, based on the communication request, on-track position information of the plurality of trains, and the usage status of the plurality of communication lines; an allocation control unit that allocates the same communication line to the mobile station that has output the communication request when there is no mobile station to which the same communication line is allocated;
A train radio communication system having a The external input storage unit is connected to an operation management system,
2. The train radio communication system according to claim 1, wherein the current location information of the plurality of trains is input from the operation management system. The external input storage unit further receives travel route information for each of the plurality of trains and a radio interference range for each of the areas,
When allocating the same communication line to the mobile station outputting the communication request, the allocation control unit further determines whether or not there is the same communication line that can be allocated based on the travel route information and the radio interference range. The train radio communication system according to claim 1 or 2, characterized by: 4. The train radio communication system according to claim 3, wherein the allocation control unit obtains the direction of travel of each of the plurality of trains from the travel route information, and estimates and judges the presence or absence of future radio interference. . The communication request requests allocation of one communication line,
3. The method according to claim 1, wherein, if there is an unused communication line among the plurality of communication lines, the allocation control unit allocates the unused communication line to the mobile station outputting the communication request. A train radio communication system as described. a communication capacity value required by the mobile station outputting the communication request is added to the communication request;
a communication capacity storage unit provided in the line control device and storing values of communication capacities of the plurality of communication lines;
The mobile station that is provided in the line control device and outputs the communication request based on the value of the communication capacity required by the mobile station that outputs the communication request and the value of the communication capacity of each of the plurality of communication lines is required. a calculation unit that calculates the number of lines to be
further comprising
The train radio communication system according to any one of claims 1 to 4, wherein the allocation control unit allocates a number of communication lines corresponding to the number of lines from among the plurality of communication lines. The communication request requires allocation of a plurality of communication lines,
When the number of allocatable communication lines among the plurality of communication lines is less than the number of lines required by the communication request, the allocation control unit sends only the allocatable communication lines to the mobile station that outputs the communication request. The train radio communication system according to claim 6 , characterized by: an external input storage unit for externally inputting and storing location information of a plurality of trains traveling in zones divided into at least three areas;
A base station provided for each area that covers the zone as a radio communication area, and a plurality of communication lines that are mounted on each of a plurality of trains that move through the zone and that have different frequency bands with the base station. a communication line storage unit that stores the usage status of the plurality of communication lines with a mobile station that is capable of communicating with a mobile station that outputs a communication request for using one of the plurality of communication lines;
a communication line to be allocated to an area adjacent to the area in which the mobile station outputting the communication request resides, based on the communication request, on-track position information of the plurality of trains, and the usage status of the plurality of communication lines; an allocation control unit that allocates the same communication line to the mobile station that has output the communication request when there is no mobile station to which the same communication line is allocated;
A line controller having a

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