JPS6077300A - Received data disposal system for on-road communicating equipment - Google Patents

Received data disposal system for on-road communicating equipment

Info

Publication number
JPS6077300A
JPS6077300A JP58186086A JP18608683A JPS6077300A JP S6077300 A JPS6077300 A JP S6077300A JP 58186086 A JP58186086 A JP 58186086A JP 18608683 A JP18608683 A JP 18608683A JP S6077300 A JPS6077300 A JP S6077300A
Authority
JP
Japan
Prior art keywords
route bus
data
communication device
received data
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP58186086A
Other languages
Japanese (ja)
Other versions
JPH0481240B2 (en
Inventor
哲夫 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP58186086A priority Critical patent/JPS6077300A/en
Publication of JPS6077300A publication Critical patent/JPS6077300A/en
Publication of JPH0481240B2 publication Critical patent/JPH0481240B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Traffic Control Systems (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 (発明の分野) 本発明は、路線バス通過データを収集して路線バスの運
行管理を制御するシステムに備えられる路上通信機の受
信データを処理することに関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to processing data received by a roadside communication device included in a system for collecting route bus passage data and controlling route bus operation management.

(従来技術とその問題点) 従来技術の路線バス運行管理制御システムには路線バス
に取り付けられた車載通信機と、この車載通信機からの
路線バス通過データを収集するとともに内部の路線バス
通過データ保持バッファに取り込み取り込んだ該路線バ
ス通過データを中央の路線バス運行管理制御装置に伝送
する路上通信機と、この路上通信機から伝送されて鰺だ
路線バス通過データに基づいて路線バスの運行管理を制
御する路線バス運行管理制御装置とを備えたものがある
。ところで、従来の前記システムでは路上通信機と路線
バス運行管理制御装置との間は通信回線で結ばれており
、このためこの通信回線を用いたときのデータの伝送速
度からデータ伝送容量には上限がある。したがって、通
信回線のデータ伝送容量をオーバーする路線バス通過デ
ータが路線バスの車載通信機から路上通信機に与えられ
ると、路上通信機は与えられた路線バス通過データを路
線バス運行管理制御装置に通信回線を用いて伝送するこ
とができないので伝送でトない間は路線バス通過データ
保持バッファに該路線バス通過データを保持してお(必
要がある。ところが、この路線バス通過データ保持バッ
ファも有限の保持容量を有しているので、例えば路線バ
スが路上通信機のところで停止するなどして該保持容量
をオーバーする路線バス通過データが与えられると、こ
の路線バス通過データ保持バッファがオーバーフローし
てしまい、正常に路線バス通過データを路線バス運行管
理制御装置に伝送できなくなるという問題点がある。こ
の問題点を解消するため従来技術では、車載通信機と路
上通信機との間の交信間隔を例えば6秒間に設定し、こ
れにより路上通信機の前記オーバーフローを防止で終る
ようにしていた。しかしながら、このように長い交信間
隔では路線バス運行管理制御装置からのデータを路上通
信機が車載通信機に送信する場合、前記交信間隔の間に
路線バスが路上通信機から通過してしまって、必要とす
るデータを送信できなくなることがあった。
(Prior art and its problems) The conventional route bus operation management control system includes an on-board communication device installed on the route bus, collects route bus passage data from this on-board communication device, and also collects internal route bus passage data. A roadside communication device that transmits the route bus passage data that has been captured into a holding buffer and taken in to a central route bus operation management control device, and a route bus operation management based on the route bus passage data transmitted from this roadside communication device. Some buses are equipped with a route bus operation management control device that controls the route bus operation. By the way, in the conventional system mentioned above, the roadside communication device and the route bus operation management control device are connected by a communication line, so there is an upper limit to the data transmission capacity due to the data transmission speed when using this communication line. There is. Therefore, when route bus passing data that exceeds the data transmission capacity of the communication line is given from the on-board communication device of the route bus to the on-road communication device, the road communication device transmits the given route bus passage data to the route bus operation management control device. Since it cannot be transmitted using a communication line, the route bus transit data is held in the route bus transit data retention buffer while it is not being transmitted (it is necessary. However, this route bus transit data retention buffer is also limited For example, if a route bus stops at a roadside communication device and route bus passing data that exceeds the retention capacity is provided, this route bus transit data retention buffer will overflow. Therefore, there is a problem in that route bus passage data cannot be transmitted normally to the route bus operation management control device. For example, it was set to 6 seconds, thereby preventing the above-mentioned overflow of the on-road communication device.However, with such a long communication interval, the on-road communication device transfers data from the route bus operation management control device to the on-board communication device. In the case of transmitting data during the communication interval, a route bus may pass from the on-road communication device during the communication interval, making it impossible to transmit the necessary data.

(発明の目的) 本発明は、路上通信機の前記オーバーフローを防止し、
必要とするデータの交信を行なえるよう1こすることを
目的とする。
(Object of the invention) The present invention prevents the overflow of road communication equipment,
The purpose is to make it easier to communicate the necessary data.

(発期の構成) 本発明は、このような目的を達成するため路上通信機は
今回収集して路線バス通過データ保持バッファに取り込
んだ路線バス通過データと前回に収集して路線バス通過
データ保持バッファに取り込まれている路線バス通過デ
ータとを比較する比較手段と、比較した両路線バス通過
データの内容が同一のとぎは今回受信した路線バス通過
データを前記路線バス通過データ保持バッファから廃棄
する廃棄手段とを含むようにしている。したがって、本
発明によれば、路上通信機と路線バス運行管理制御装置
との間の通信回線に上限の伝送容量があっても前記交信
間隔を短縮し、これにより車載通信機に対して該路上通
信機は正常に路線バス運行管理制御装置からのデータを
送信し、また車載通信機からの路線バス通過データを路
線バス運行管理制御装置に伝送することができ、路線バ
スの運行管理に何らの支障をきたすことなく正常に運行
管理を制御することがでとる。
(Initial configuration) In order to achieve such an objective, the present invention provides that the on-road communication device retains the route bus passage data collected this time and taken into the route bus passage data retention buffer, and the previously collected route bus passage data. A comparison means for comparing the route bus passage data stored in the buffer, and a comparison means for comparing the route bus passage data that has been compared with the same content, discarding the currently received route bus passage data from the route bus passage data holding buffer. and means of disposal. Therefore, according to the present invention, even if the communication line between the on-road communication device and the route bus operation management control device has an upper limit transmission capacity, the communication interval is shortened, and thereby the on-board communication device The communication device can normally transmit data from the route bus operation control device, and can also transmit the route bus passage data from the on-board communication device to the route bus operation control device, so there is no need for any route bus operation management. This can be achieved by controlling operation management normally without causing any hindrance.

(実施例の説明) 以下、本発明を図面に示す実施例に基づいて詳細に説明
する。前記特許請求の範囲で路線バス通過データには路
線バスが路上通信機の前を停止することなく通過するデ
ータと路上通信機の前で停止したときのデータも含まれ
、また前回という用語は前回のみならず前々回、前44
回等も含まれるものである。第1図は、この実施例の路
線バス運行管理制御システムの全体のブロック図である
(Description of Examples) Hereinafter, the present invention will be described in detail based on examples shown in the drawings. In the above claims, the route bus passage data includes data when the route bus passes without stopping in front of the on-road communication device and data when the route bus stops in front of the on-road communication device, and the term “previous time” refers to the previous time. Not only the last time, but also the previous 44
This also includes times, etc. FIG. 1 is an overall block diagram of the route bus operation management control system of this embodiment.

第1図において、符号1は路線バス2に取り付けられた
車載通信機、3,3.、、は路上に設置されてこの車載
通信機1からの路線バス通過データを無線電波4で収集
するとともに内部の路線バス通過データ保持バッファ・
に取り込み、取り込んだ該路線バス通過データを通信回
線5.S、、、、を介して中央の路線バス運行管理制御
装置6に伝送する路上通信機、6は前記路」二通信磯3
から伝送されてぎだ路線バス通過データに基づいて路線
バス2の運行管理を制御する路線バス運行管理制御装置
である。
In FIG. 1, reference numeral 1 indicates an on-vehicle communication device attached to a route bus 2, 3, 3 . ,, is installed on the road and collects route bus passing data from this in-vehicle communication device 1 using wireless radio waves 4, as well as an internal route bus passing data holding buffer.
The route bus passing data is transferred to the communication line 5. A roadside communication device that transmits data to the central route bus operation management control device 6 via S, .
This is a route bus operation management control device that controls the operation management of the route bus 2 based on route bus passage data transmitted from the Gida route bus passage data.

第2図は路上7に設置された路上通信機3の路線バス2
との開のデータの交信範囲を示す図である。第2図にお
いて、符号2,2は路線バス、7,7は路」二通信磯3
の前記交信範囲、8,8は矢符9゜9の上ぼり車線と下
り車線とを有する車道である。
Figure 2 shows a route bus 2 with a roadside communication device 3 installed on the road 7.
FIG. 3 is a diagram showing the communication range of open data. In Figure 2, numerals 2 and 2 are route buses, and 7 and 7 are road buses.
The communication range 8, 8 is a roadway having an up lane and a down lane of arrow 9°9.

路上通信(幾3は前記交信範囲7.7に到来して外だ路
線バス2に備えられる車載通信機1との開でデータの交
信を行なう。
On-road communication (the bus 3 arrives at the communication range 7.7 and communicates data with the on-vehicle communication device 1 provided on the route bus 2).

第3図は前記路上通信機3の内部のブロック図である。FIG. 3 is a block diagram of the inside of the roadside communication device 3. As shown in FIG.

路上通信機3は車載通信機1との間でデータの送受信を
行なうためのアンテナ31と、該送受信の内容を変復調
するモデム32と、路線バス通過データを収集し取り込
み、取り込んだ路線バ又通過データを路線バス運行管理
制御装置6に伝送する路線バス通過5データ保持バツフ
ア33と、今回収集して路線バス通過データ保持バッフ
ァ33に取り込んだ路線バス通過データと前回、前々回
、前44回に収集して路線バス通過データ保持バッファ
33に取り込まれている路線バス通過データとを比較す
る比較手段34と、比較した両路線バス通過データの内
容が同一のときは今回受信した路線バス通過データを前
記路線バス通過データ保持バッファ33から廃棄する廃
棄手段35と、路線バス通過データ保持バッファ33で
保持されている路線バス通過データを路線バス運行管理
制御装置6に伝送する伝送手段36とを含む。
The on-road communication device 3 includes an antenna 31 for transmitting and receiving data to and from the in-vehicle communication device 1, a modem 32 that modulates and demodulates the contents of the transmission and reception, and a route bus passing data that collects and imports route bus passing data. The route bus passage 5 data holding buffer 33 transmits the data to the route bus operation management control device 6, the route bus passage data collected this time and taken into the route bus passage data holding buffer 33, and the route bus passage data collected last time, the time before last, and the 44th time before. The comparing means 34 compares the route bus passage data stored in the route bus passage data holding buffer 33, and when the contents of the compared route bus passage data are the same, the route bus passage data received this time is compared with the route bus passage data received this time. It includes a discarding means 35 for discarding the route bus passage data holding buffer 33, and a transmission means 36 for transmitting the route bus passage data held in the route bus passage data holding buffer 33 to the route bus operation management control device 6.

第4図は前記路線バス通過データ保持バッファ33の記
憶内容を示す図である。第4図において、A1は今回受
信データの記憶工IJア、A2は最新受信データ(前回
受信データ)の記憶エリア、A3は最新受信データの受
信後のタイマカウント値の記憶エリア、A4は最新前受
信データ(前々回受信データ)の記憶エリア、A5は最
新前受信データの受信後のタイマカウント値の記憶エリ
ア、八6は最新前々回受信データ(前44回受信データ
)の記憶エリア、A7は最新前々回受信データの受信後
のタイマカウント値の記憶エリア、A8は受信データの
保持時間(設定値)の記憶エリア、A9は路線バス運行
管理制御装置6への送信データバッファ1の記憶エリア
、AIOは同じく路線バス運行管理制御装置6への送信
データバッファ2の記憶エリア、A11.、、A12は
同様に路線バス運行管理制御装置6への送信データバッ
ファ3.。
FIG. 4 is a diagram showing the stored contents of the route bus passage data holding buffer 33. In Fig. 4, A1 is the storage area for the current received data, A2 is the storage area for the latest received data (previously received data), A3 is the storage area for the timer count value after receiving the latest received data, and A4 is the storage area for the latest received data. A5 is a storage area for the timer count value after receiving the latest previous received data, 86 is a storage area for the latest received data (previous 44th received data), A7 is a storage area for the latest previous received data (previous 44th received data), A7 is the latest previous received data. A storage area for the timer count value after receiving the received data, A8 is the storage area for the retention time (set value) of the received data, A9 is the storage area for the transmission data buffer 1 to the route bus operation management control device 6, and AIO is the same. Storage area of transmission data buffer 2 to route bus operation management control device 6, A11. , , A12 is the transmission data buffer 3 . . . .

、nの記憶エリアである。実施例では今回受信データの
記憶エリアと3回分の前回、前々回、および前44回の
受信データのそれとが示されるが、これに限定されるも
のではない。
, n. In the embodiment, the storage area for the currently received data and the storage area for the three previous times, the time before the previous time, and the previous 44 times are shown, but the present invention is not limited to this.

次に、第5図のフローチャートを参照しながら動作を説
明する。 車載通信機1からの路線バス通過データが路
上通信機3に送信される。路上通信機3はこの路線バス
通過データを今回受信データとしてアンテナ31とモデ
ム32とを介して路線バス通過データ保持バッファ33
に取り込む。
Next, the operation will be explained with reference to the flowchart shown in FIG. Route bus passage data from the on-vehicle communication device 1 is transmitted to the on-road communication device 3. The on-road communication device 3 uses this route bus passage data as currently received data to send it to a route bus passage data holding buffer 33 via an antenna 31 and a modem 32.
Incorporate into.

この路線バス通過データ保持バッファ33にすでに3回
号の前回、前々回、および前44回の受信データが取り
込まれている。比較手段34は第5図(a)のフローチ
ャートにおけるステップn1において、今回受信データ
をセットし、ステップn2で今回受信データと最新受信
データ(前回受信データ)とを比較する。両受信データ
が同一であればYESと判定してステップn6に進む。
This route bus transit data holding buffer 33 has already taken in the received data of the previous three issues, the time before the previous time, and the previous 44 times. The comparison means 34 sets the currently received data in step n1 of the flowchart of FIG. 5(a), and compares the currently received data with the latest received data (previously received data) in step n2. If both received data are the same, the determination is YES and the process proceeds to step n6.

同一ではなくNoであればステップn4に進む。ステッ
プn 4では今回受信データと最新前回受信データ(前
々回受信データ)とを比較し、両受信データが同一であ
ればステップn6に進む。同一でなければステップ口5
に進む。ステップn5では今回受信データと最新前々回
(前44回受信データ)とを比較し、両受信データが同
一であればステップn6に進む。同一でなければステ・
ンプn7に進む。ステップn7では今回受信データがす
でに受信されている受信データとはすべて同一でないの
で廃棄手段35は最新前々回受信データを廃棄する。そ
して、最新前回受信データを最新前々回受信データにセ
ットするとともにステップn8で今回受信データを最新
受信データにセットする。更に、ステップn9でタイマ
カウント値をセットする。一方、ステップn6では今回
受信データは必要でないので該年回受信データを廃棄す
る。他方、ステップn10では今回受信データを送信デ
ータバッファへ転送するかどうかを判定し、転送しなの
であればNOと判定して路線バス通過データ保持バッフ
ァ33がオーバーフローであるとし、そうでなければY
ESと判定しステップni]で今回受信データを送信デ
ータバッファへ送信する。こうして、廃棄されなかった
受信データが路線バス通過データとして伝送手段36を
介して路線バス運行管理制御装置6へ伝送される。路線
バス通過データ保持バッファ33は受信データを一定時
間(例えば18秒)保持し、この一定時間をオーバーす
れば順次保持している受信データを廃棄するが、一定時
間後としたのは路線バス運行管理制御装置6が路上通信
機3の所での路線バス2の在車検知を行なうためである
。一定時間内に複数の路線バス2が通過すれぼ路上通信
器3と路線バス運行管理制御装置6との間の通信回線が
伝送容量を越えることがあるが、このような場合は路線
バス運行管理制御装置6への送信データの伝送は待ち行
列全作り、伝送する順番がくるまで路線バス通過データ
保持バッファ33にこの受信データを蓄積しておく。尚
、一定時間を例えば18″秒としたのは路上通信器3の
性能により、この時間内であれば路上通信器3がオーバ
ーフローしないとされるからである。よrこ、前記受信
データの廃棄のタイミングは第4図−で説明した路線バ
ス通過データ保持バッファ33の記憶エリアA3.As
、A?内のタイマカウント値により決定する。第5図(
b)は受信データのタイフカ1クント値のカウントアン
プについての70−チャートである。ステップS1で内
部タイマを受信データを受信した時点からカウントアツ
プしていく。ステップS2では所定のタイマカウント、
値までにカウントアツプした受信データがあるかどうか
を判定し、あればYESと判定してステップ33に進む
。ステップS3ではカウントアツプし
If they are not the same and the answer is No, the process advances to step n4. In step n4, the current received data and the latest previous received data (received data the day before last) are compared, and if both received data are the same, the process advances to step n6. If not the same, step port 5
Proceed to. In step n5, the current received data is compared with the most recent data received the previous time (previous 44th received data), and if both received data are the same, the process advances to step n6. If they are not the same, the status
Proceed to step n7. In step n7, since the currently received data is not the same as the previously received data, the discarding means 35 discards the most recent received data. Then, the latest previous received data is set to the latest previous received data, and the current received data is set to the latest received data at step n8. Furthermore, a timer count value is set in step n9. On the other hand, in step n6, since the current reception data is not needed, the annual reception data is discarded. On the other hand, in step n10, it is determined whether or not to transfer the received data this time to the transmission data buffer.
If it is determined to be ES, the currently received data is transmitted to the transmission data buffer in step ni]. In this way, the received data that has not been discarded is transmitted to the route bus operation management control device 6 via the transmission means 36 as route bus passing data. The route bus transit data retention buffer 33 retains the received data for a certain period of time (for example, 18 seconds), and if this period of time is exceeded, the received data is sequentially discarded. This is because the management control device 6 detects the presence of the route bus 2 at the roadside communication device 3. If multiple route buses 2 pass within a certain period of time, the communication line between the roadside communication device 3 and the route bus operation management control device 6 may exceed the transmission capacity, but in such a case, the route bus operation management To transmit the transmission data to the control device 6, a complete queue is created, and the received data is stored in the route bus passage data holding buffer 33 until it is the turn to transmit it. The reason why the certain period of time is set to 18" seconds, for example, is that the roadside communication device 3 will not overflow within this time depending on the performance of the roadside communication device 3. Please discard the received data. The timing is determined by the storage area A3.As of the route bus passage data holding buffer 33 explained in FIG.
, A? Determined by the timer count value within. Figure 5 (
b) is a 70-chart for the count amplifier of the received data count value. In step S1, an internal timer is counted up from the time when the received data is received. In step S2, a predetermined timer count,
It is determined whether there is received data that has been counted up to the value, and if so, it is determined as YES and the process proceeds to step 33. In step S3, count up

【図面の簡単な説明】[Brief explanation of drawings]

図面は、本発明の実施例に係り、第1図はこの実施例の
全体のブロック図、第2図は路上に設置された路上通信
器の路線バスとの開のデータの交信範囲を説明するため
の図、第3図は路上通信器3の内部ブロフク図、第4図
は路線バス通過データ保持バッファ33の記憶エリアの
構成図、第5図(a)(1〕)は実施例の動作説明に供
する図である。 1は路上通信器、2は路線バス、3は路上通信器、6は
路線バス運行管理制御装置、33は路線バス通過データ
保持バッファ、34は比較手段、35は廃棄手段、 出願人立石電(佐株式会社 代理人 弁理士 岡1)和秀 第3図 3、 第4図
The drawings relate to an embodiment of the present invention, and Fig. 1 is an overall block diagram of this embodiment, and Fig. 2 explains the communication range of open data between a roadside communication device installed on the road and a route bus. 3 is an internal block diagram of the roadside communication device 3, FIG. 4 is a configuration diagram of the storage area of the route bus passage data holding buffer 33, and FIG. 5(a) (1) is the operation of the embodiment. It is a figure provided for explanation. 1 is a road communication device, 2 is a route bus, 3 is a road communication device, 6 is a route bus operation management control device, 33 is a route bus passage data holding buffer, 34 is a comparison means, 35 is a disposal means, Applicant Tateishi Den ( Sa Co., Ltd. Agent Patent Attorney Oka 1) Kazuhide Figure 3 Figure 3, Figure 4

Claims (1)

【特許請求の範囲】[Claims] (1)路線バスに取り付けられた車載通信機からの受信
データを収集するとともに該受信データを内部の路線バ
ス通過データ保持バッファに取り込みかつ取り込んだ受
信データを所定時間保持する路上通信機と、該路上通信
機との間で路線バス通過データの伝送を行ない路線バス
運行管理制御を行なう路線バス運行管理制御装置とを具
備し、該路」二通信磯は今回収集して路線バス通過デー
タ保持パン7アに取り込んだ路線バス通過データと前回
に収集して路線バス通過データ保持バッファに取り込ま
れている路線バス通過データとを比較する比較手段と、
比較した両路線バス通過データの内容が同一のときは今
回受信した路線バス通過データを前記路線バス通過デー
タ保持バッファから廃棄する廃棄手段とを含む路上通信
機の受信データ廃棄システム。
(1) A roadside communication device that collects received data from an on-board communication device installed on a route bus, captures the received data into an internal route bus transit data holding buffer, and holds the captured received data for a predetermined period of time; It is equipped with a route bus operation management control device that transmits route bus passage data to and from the on-road communication device and performs route bus operation management control. a comparison means for comparing the route bus passage data imported into 7A with the route bus passage data collected last time and imported into the route bus passage data holding buffer;
A received data discard system for a roadside communication device, comprising a discarding means for discarding the currently received route bus transit data from the route bus transit data holding buffer when the contents of the compared route bus transit data are the same.
JP58186086A 1983-10-04 1983-10-04 Received data disposal system for on-road communicating equipment Granted JPS6077300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58186086A JPS6077300A (en) 1983-10-04 1983-10-04 Received data disposal system for on-road communicating equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58186086A JPS6077300A (en) 1983-10-04 1983-10-04 Received data disposal system for on-road communicating equipment

Publications (2)

Publication Number Publication Date
JPS6077300A true JPS6077300A (en) 1985-05-01
JPH0481240B2 JPH0481240B2 (en) 1992-12-22

Family

ID=16182124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58186086A Granted JPS6077300A (en) 1983-10-04 1983-10-04 Received data disposal system for on-road communicating equipment

Country Status (1)

Country Link
JP (1) JPS6077300A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014041588A (en) * 2012-07-23 2014-03-06 Sumitomo Electric System Solutions Co Ltd Optical beacon and transmission device
JP2016110608A (en) * 2014-12-01 2016-06-20 住友電気工業株式会社 Roadside communication device, communication system, and data relay method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS547424A (en) * 1977-06-20 1979-01-20 Asahi Dow Ltd Phosphate compositions

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS547424A (en) * 1977-06-20 1979-01-20 Asahi Dow Ltd Phosphate compositions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014041588A (en) * 2012-07-23 2014-03-06 Sumitomo Electric System Solutions Co Ltd Optical beacon and transmission device
JP2017107590A (en) * 2012-07-23 2017-06-15 住友電工システムソリューション株式会社 Transmission device
JP2016110608A (en) * 2014-12-01 2016-06-20 住友電気工業株式会社 Roadside communication device, communication system, and data relay method

Also Published As

Publication number Publication date
JPH0481240B2 (en) 1992-12-22

Similar Documents

Publication Publication Date Title
CN105427442B (en) A kind of entrance vehicle pass-through methods, devices and systems
EP0602806A2 (en) High-level data link controller (HDLC) receiver
JPS6077300A (en) Received data disposal system for on-road communicating equipment
JP2828006B2 (en) Bridge device
JP2930078B1 (en) In-vehicle device in automatic toll collection system
JPH026268A (en) Method for controlling closure
US5282198A (en) Initialization of data stations on a dual bus data subnetwork
JP3052888B2 (en) Traffic information receiver
JPS5859645A (en) Transmitter for data transmission
JPS60223353A (en) Data transfer system
JPH01135154A (en) Packet switching device
EP0825774B1 (en) System for transmitting digital video signals by way of a telecommunications network, as well as device
JPS6332302B2 (en)
JPS634731A (en) Data collection system
JP2004048350A (en) Data relay apparatus and multiplex communication system
JPH04127738A (en) Network system and multiple address communication response control method
JP2001195621A (en) Double charging preventing method for vehicle roadside communication
JPS63146641A (en) Receiver
JPS6313623B2 (en)
JPS6322750B2 (en)
JP3430689B2 (en) Bidirectional repeater device
JPS5925538B2 (en) Packet transfer device
JPS61142831A (en) Time division multiplexer
JPS5973863U (en) Information signal selection device for multiplex communication system
JPS5978755U (en) Information signal selection device for multiplex communication system