JP2950523B2 - Mutual information transmission method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information transmission method,
In particular, the present invention relates to a mutual information transmission method for mutually transmitting and receiving unit information data of a fixed length between two transmission devices.

[0002]

2. Description of the Related Art Among information transmission methods, there is a method using a mutual information transmission method for mutually transmitting and receiving unit information data of a fixed length between two transmission devices. Used. The train information transmission device
A fixed length of unit information data is mutually transmitted and received between two transmission devices on the running vehicle and on the ground side. Train number information is transmitted from the vehicle, and received on the ground to obtain the train number information. The control of the traffic signal and the control of the level crossing or the guidance to the station premises are performed based on the specified train. A conventional transmission method at this time will be described with reference to the drawings. FIG.
FIG. 7 is a diagram showing a schematic configuration of a train information transmission device, in which an oscillator of an on-board device 1 of a running train T outputs information specific to the train, for example, an 80-bit digital data including 48-bit digital data information as shown in FIG. The signal is FM-modulated, and this signal is continuously and repeatedly transmitted as radio waves via the vehicle upper body 2, while the corresponding ground side (G 0,
G2,..., GZ), receives the modulated radio wave, demodulates it into a digital signal by a demodulator, and passes through a code processor (encoder) 3 to a centralized train control device (CTC device).
4 and the CTC device 4 sends control signals to various ground facilities to perform the various controls described above. Conversely, the information can be transmitted from the ground side via the ground child (G0, G2,..., GZ), and the on-vehicle device 1 can receive this information via the vehicle child 2.

[0003] In the above-mentioned mutual information transmission method, there is a problem in that the information to be transmitted is limited to a single one having a fixed length, so that the application is limited. In recent years, train control of railways has become more sophisticated,
Information to be transmitted is also increasing, and it has been desired to solve the above problems. For this reason, the inventors of the present application have already disclosed Japanese Utility Model Application 1
No. 144627 proposes an apparatus for continuously transmitting a series of fixed-length data. The proposed device is shown in FIG.
When the data received from the ground child G0 is the information instruction data, the on-board device analyzes that fact, and the instructed continuous information is temporarily stored in a buffer. When the reception is interrupted, this is detected, and the first data a1 of the continuous information is repeatedly transmitted, and the next ground child G1 is transmitted.
By receiving more signals and interrupting the received data,
This is an apparatus that repeatedly transmits the next data a2 of the continuous information, and sequentially transmits the data to the last data az of the continuous information in a similar procedure.

[0004]

However, the above-described mutual information transmission method has a configuration in which only one type of information can be transmitted each time a state in which mutual communication is possible occurs once. There is a problem that it is necessary to install many ground terminals in order to transmit a long continuous information. From a different viewpoint, there is a problem that when only a certain number of ground terminals are available, the information to be transmitted is limited and the application is limited. An object of the present invention is to solve the above-described problems by proposing a method of transmitting information data having a length exceeding this unit information data at a high density between devices transmitting only unit information data of a fixed length. I do.

[0005]

In order to solve the above-mentioned problems, a mutual information transmission method according to the present invention is directed to a mutual information transmission method for repeating unit information data of a fixed length and mutually transmitting between two transmission devices. In the continuous information data consisting of a series of a plurality of unit information data to be transmitted, the last unit information data includes tail information indicating the fact in the content, and the other unit information data includes order information indicating the order thereof. Is included in the content, and only when each of the two transmission devices detects that the content of the unit information data to be received is different from that previously received, a unit having a different content from the unit information data that has been repeatedly transmitted until then. It switches to information data and repeats transmission, and normally completes a series of information reception that includes different order information in the contents as unit information data. In the case where the data is sequentially switched and transmitted, and the continuous information data is transmitted when desired, the unit information data constituting the data is sequentially switched and transmitted, and when the unit information data including the request information is received, The continuous information data is sequentially switched and transmitted, and when the tail information is received, the continuous information data is switched to tail reception data indicating the reception and transmitted.

In order to further improve the reliability of the transmission, in the method of the second invention of the present application, in the mutual information transmission method described above, the transmission device receives the unit information data a plurality of times and the received contents are the same. After checking that there is, switch the transmission unit information data so that it is repeatedly transmitted,
If the unit information data from the partner device is not received for a predetermined time while the continuous information data is being transmitted, the unit information data is transmitted again from the first unit information data of the continuous information data being transmitted.

[0007]

In the above-described method, the next unit information data is transmitted immediately after the transmission of the unit information data is completed.
It is possible to efficiently transmit information of a desired length by using a device for transmitting unit information data of a fixed length. Second
According to the method, the reliability of information transmission is improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 2 is a diagram illustrating a train information transmission device using the mutual information transmission method according to the present invention. This device has substantially the same configuration as that shown in FIG. 6 and has the same function. That is, from the oscillator of the on-board device 1 of the running train T, information specific to the train, for example, an 80-bit digital signal including 48-bit digital data information is transmitted to the FM.
This signal is modulated and transmitted continuously and repeatedly as a radio wave via the upper child element 2, while the corresponding terrestrial side receives the modulated electric wave by the ground children G0 and L0 (L0 is a loop coil). This is demodulated into a digital signal by a demodulator, and input to a train central control device (CTC device) 4 via a code processor (encoder) 3. The CTC device 4 sends out control signals to various ground facilities. Thus, the various controls described above are performed. Conversely, information can be transmitted from the ground side via the ground child (G0, L0), and the on-board device 1 can receive this information via the vehicle child 2. The method of the present invention is a mutual information transmission method for repeating unit information data of a fixed length applied to the device as shown in FIG. 2 and mutually transmitting and receiving between two transmission devices. The on-board device 1 transmits unit information data of a fixed length, and transmits information (DS) completed by a single unit information data and continuous information data composed of a series of a plurality of unit information data.

Hereinafter, the steps constituting the method of the present invention will be described. In the present invention, in the continuous information data (DL1, DL2,..., DLT or DL′1, DL′2,..., DL′T) comprising the series of plural unit information data, the last unit information data (DLT, DL'T) includes tail information indicating that fact in the content, and the other unit information data includes order information indicating the order in the content. In addition, each of the two transmission apparatuses normally continuously transmits the same unit information data repeatedly. However, only when it is detected that the contents of the unit information data received from the other party is different from the previously received unit information data, the two transmission apparatuses always transmit the same unit information data. Switching to the unit information data having a different content from the unit information data that has been repeatedly transmitted up to that time is repeated. When switching the unit information data, a series of information reception completion data (U
K1, UK2,..., UKn) are sequentially transmitted.
However, when desired, the continuous information data (DL1, DL1)
2, ..., DLT or DL'1, DL'2, ..., DL '
In the case of transmitting T), the unit information data constituting the T) is sequentially switched and transmitted. Further, when unit information data including request information is received from the other party, the continuous information data is sequentially switched and transmitted, and unit information data which is the last of the continuous information data including the tail information is received. Is transmitted after being switched to tail reception data (LOK) indicating that the data has been received. According to the method described above, it is possible to achieve the purpose of mutually transmitting continuous information data composed of a series of plural unit information data even by a method of transmitting unit information data of a fixed length.

However, this embodiment further includes the following steps for the purpose of improving the reliability of transmission. That is, the transmission device receives the unit information data a plurality of times, and after checking that each received content is the same, switches the transmission unit information data and repeatedly transmits the same,
If the unit information data from the partner device is not received for a predetermined time while the continuous information data is being transmitted, the unit information data is transmitted again from the first unit information data of the continuous information data being transmitted.

FIGS. 1, 3, 4 and 5 show some examples of transmission operations when the method of the present invention is applied. Hereinafter, the operation of the method of the present invention will be described with reference to these examples. FIG. 1 shows continuous information data (D, respectively) from both the vehicle upper side and the ground side in the train information transmitting apparatus described above.
L1, DL2, DL3, DLT and DL'1, DL '
2, DL'3, DL'T). The on-board device 1 of the running train T transmits the first unit information data (D1) of the continuous data to transmit the continuous information data (DL1, DL2, DL3, DLT) to the ground side if desired.
L1) is repeatedly transmitted. On the ground side, the ground child G0 repeatedly transmits unit information data (SW) indicating that the ground child will be switched to the loop coil (L0). By the way, when the train progresses and reaches the installation point of the ground child (G0), transmission is performed mutually between the two transmission devices, and the unit information data of the other party is received. A check is performed to determine whether or not the information is the same as the information. A unit is transmitted for a predetermined number of times (for example, twice) when the information having the same content is received, and when it is detected that the content is different from the content transmitted before that time. The information data is switched and transmitted repeatedly. That is, from the ground side (DL'1)
Is transmitted, and (DL2) is transmitted from the upper side of the vehicle. The switching of the unit information data sent from both transmission devices is recognized by the transmission device on the other side, and in response to this, the next unit information data (DL on the terrestrial side) is further transmitted from each transmission device. '2, DL3) is repeatedly transmitted on the upper side of the vehicle. Thereafter, the mutual transmission continues similarly, and after the transmission of the last unit information data (DLT) of the continuous data is completed in the on-board unit, a series of information reception completion data (UK1) including different order information repeated in the content is repeated. , U
K2,..., UKn) are transmitted (UK1). On the ground side, the reception of the last unit information data (DLT) of the continuous data is stored, and immediately after the transmission of the continuous information data is completed, the unit information data (LOK) indicating that the reception of the (DLT) is completed. Is transmitted, the information reception completion data (UK1, UK2,..., UKn) are sequentially switched in this order and transmitted. When the last unit information data (DL'T) of the continuous information data on the ground side is received on the vehicle side, a corresponding (LOK) is transmitted, and thereafter, the information reception completion data (UK1, UK2, ..., UKn)
Are sequentially switched in this order and transmitted. FIG. 3 shows a case where continuous information data is transmitted according to unit information data (RQ) requesting transmission of continuous information data from the other party, and continuous information data should be transmitted from the ground side. On the upper side of the vehicle, continuous information data (DL1, DL2, DLT) is transmitted according to the unit information data (RQ) to the effect.

FIG. 4 is a diagram showing a response to a transmission failure, in which continuous information data is transmitted from the upper side of the vehicle to the inside (DLn), but cannot be received from the ground side (or unit information data having the same contents as before). When a certain period of time has passed since the unit information data was switched on the ground side when an abnormal situation such as (transmitted) occurred, the unit information data (DL1) of the first continuous information data being transmitted is re-started. Send.
FIG. 5 shows an example in which the transmission of the continuous information data is not included. The unit information data (UK1 to UK5) is switched and sequentially transmitted on the upper side of the vehicle, and (UK1) on the ground side.
To UK4) are switched and sequentially transmitted. Note that (DS) is short sentence information completed with a single unit information data. As described above, each transmission device switches the unit information data to be transmitted immediately upon completion of the reception of the unit information data, so that continuous information is transmitted one after another. Is completed. Therefore, if a loop coil (L0) which is installed along the traveling path as a ground wire for a considerable length and therefore can be used for transmission for a long time is used, much more information can be obtained in one place than in the conventional method. They can be transmitted to each other.

In the above, an example in which a loop coil is used in combination with a ground wire has been described. However, as shown in FIG. 6, the ground wire may be only a point-shaped wire which is arranged along the train travel path at appropriate intervals. You may use only a coil. The present invention is not limited to the train control device, but can be widely applied to any device that transmits data of a certain length mutually.

[0014]

According to the method of the present invention including the steps described above in detail, in the mutual information transmission method for transmitting unit information data of a fixed length repeatedly between two transmission devices, each of the two transmission devices However, only when it is detected that the content of the unit information data to be received is different from the previously received unit information data, the unit information data which has been repeatedly transmitted up to that time is switched to the unit information data having a different content, and the data is repeatedly transmitted. Thus, information can be transmitted efficiently and therefore at high speed. Therefore, a large amount of information consisting of continuous unit information data can be transmitted efficiently.
Further, the transmission device receives the unit information data a plurality of times, checks that the received contents are the same, switches the transmission unit information data, and repeatedly transmits the data. When the unit information data from the device is not received for a certain period of time, the unit information data is transmitted again from the first unit information data of the continuous information data being transmitted, so that the reliability of transmission is increased.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the operation of a train information transmission device according to the mutual information transmission method of the present invention.

FIG. 2 is a diagram illustrating an example of a train information transmission device according to the mutual information transmission method of the present invention.

FIG. 3 is a diagram illustrating the operation of the train information transmission device according to the mutual information transmission method of the present invention.

FIG. 4 is a diagram illustrating the operation of the train information transmission device according to the mutual information transmission method of the present invention.

FIG. 5 is a diagram illustrating the operation of the train information transmission device according to the mutual information transmission method of the present invention.

FIG. 6 is a diagram illustrating an example of a train information transmission device according to the mutual information transmission method of the present invention.

FIG. 7 is a diagram illustrating a configuration of unit information data according to the mutual information transmission method of the present invention.

[Explanation of symbols]

 1 ... on-board device (transmission device), 2 ... on-board device, B ... ground device (transmission device), G0, L0 ... ground device, T ... train.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 5/00-5/06 H04B 7/24-7/26 B61L 25/00-27/04

Claims (2)

(57) [Claims] 1. A mutual information transmission method for repeatedly transmitting unit information data of a fixed length between two transmission apparatuses and transmitting the last unit information data, wherein the last of continuous information data consisting of a series of plural unit information data to be transmitted is provided. The unit information data includes tail information indicating that fact in its contents, and the other unit information data includes sequence information indicating its order in its contents. Only when it is detected that the content of the unit information is different from the previously received one, the unit information data that has been repeatedly transmitted is switched to the unit information data with a different content, and the unit is repeatedly transmitted. As information data, a series of information reception completion data including repetitive different order information in the content is sequentially switched and transmitted, and the continuous information data is transmitted when desired. The unit information data constituting this is sequentially switched and transmitted, and when unit information data including request information is received, the continuous information data is sequentially switched and transmitted, and when the tail information is received, Is a method of transmitting information by switching to tail reception data indicating that the data has been received. 2. The transmission device receives the unit information data a plurality of times, checks that the received contents are the same, switches the transmission unit information data, and repeatedly transmits the unit information data. 2. The mutual information transmission method according to claim 1, wherein when unit information data from the partner apparatus is not received during the transmission for a predetermined time, the unit information data is transmitted again from the first unit information data of the continuous information data being transmitted. .