JPH05191331A - Communication system among vehicles - Google Patents
Communication system among vehiclesInfo
- Publication number
- JPH05191331A JPH05191331A JP4006554A JP655492A JPH05191331A JP H05191331 A JPH05191331 A JP H05191331A JP 4006554 A JP4006554 A JP 4006554A JP 655492 A JP655492 A JP 655492A JP H05191331 A JPH05191331 A JP H05191331A
- Authority
- JP
- Japan
- Prior art keywords
- vehicle
- information
- vehicles
- central processing
- processing station
- 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.)
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- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、道路を走行中の車両が
相互間で通信する場合の車々間通信方式に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-to-vehicle communication system when vehicles running on a road communicate with each other.
【０００２】[0002]
【従来の技術】道路を走行中の車両相互間で直接通信を
行う車々間通信は光通信技術や無線通信技術によって実
現できることが一般に知られている（例えば「車々間通
信システムに関する調査研究」財団法人機械システム振
興協会（平成２年３月）Ｐ．７−１３）。2. Description of the Related Art It is generally known that vehicle-to-vehicle communication for directly communicating between vehicles running on a road can be realized by optical communication technology or wireless communication technology (for example, "Survey and research on vehicle-to-vehicle communication system") System Promotion Association (March, 1990) P.7-13).
【０００３】この走行車両相互間の通信を使用すれば、
道路上で自動車の運転を行う場合、自車の直前、左右の
車両が現在どの様な運転状態であるかを運転者は知るこ
とが可能になる。この結果、運転者は従来よりも前方の
車両との車間距離を詰めることが出来る（道路利用効率
の向上）。また、運転者は、現在より車両速度が速くな
っても運転操作に余裕が出来る。Using this communication between traveling vehicles,
When driving a car on the road, the driver can know what kind of driving conditions the right and left vehicles are in front of themselves. As a result, the driver can shorten the inter-vehicle distance from the vehicle ahead of the conventional one (improvement of road use efficiency). In addition, the driver can afford to operate the vehicle even if the vehicle speed becomes faster than at present.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、以上に
述べた車々間通信は、車両相互に、車対車で１対１で通
信をおこなう通信方式であるので、自車の周囲の車両と
の通信は可能であるが、遠方の車両との通信は困難であ
り、また同報通信をおこなうことも困難であるという問
題点があった。However, the vehicle-to-vehicle communication described above is a communication system in which vehicles communicate with each other on a one-to-one basis. Therefore, communication with vehicles around the vehicle is not possible. Although possible, it is difficult to communicate with a distant vehicle, and it is also difficult to perform broadcast communication.
【０００５】本発明は、上記問題点を解決するためにな
されたものであって、車々間通信に中央処理局を介在さ
せることにより遠方の車両との通信や同報通信を可能と
した車々間通信方式を提供することを目的とする。The present invention has been made to solve the above-mentioned problems, and an inter-vehicle communication system that enables communication with a distant vehicle or broadcast communication by interposing a central processing station in the inter-vehicle communication. The purpose is to provide.
【０００６】[0006]
【課題を解決するための手段】本発明は上記目的を達成
するため、走行する車両と中央処理局との間で情報を変
換する通信手段を設け、前記車両は自車の監視情報を前
記中央処理局に送信し、前記中央処理局は前記監視情報
および外部から入力される情報により運転支援情報を生
成して所定の車両に送信するものである。In order to achieve the above object, the present invention is provided with a communication means for converting information between a traveling vehicle and a central processing station, and the vehicle is provided with the monitoring information of its own vehicle in the central area. The information is transmitted to a processing station, and the central processing station generates driving support information based on the monitoring information and information input from the outside and transmits the driving support information to a predetermined vehicle.
【０００７】[0007]
【作用】中央処理局は通信可能範囲内を走行する各車両
の監視情報を全て収集すると共に外部から気象情報、渋
滞情報等を入力する。そして、これらの情報に基づき車
両運転に役立つ運転支援情報、例えば近接して走行する
車両が急接近するとの情報、走行地域の渋滞状況や気象
急変情報、更には車両の行先である遠方の地域の気象状
況、事故情報等を関係車両に個別的にあるいは同報通信
により提供する。The central processing station collects all monitoring information of each vehicle traveling within the communicable range and inputs weather information, traffic jam information and the like from the outside. Then, based on these information, driving assistance information useful for driving the vehicle, for example, information that a vehicle traveling in close proximity is suddenly approaching, traffic congestion situation and sudden weather change information of the traveling area, and further information on a distant area that is the destination of the vehicle. Provides weather conditions, accident information, etc. to related vehicles individually or by broadcast communication.
【０００８】[0008]
【実施例】図１は本発明の実施例を示す構成図であっ
て、１ａ，１ｂ，１ｃは道路を走行中の車両、２ａ，２
ｂ，２ｃは道路に沿って所定の区間毎に漏洩同軸ケーブ
ルを敷設した漏洩同軸ケーブル装置、３は漏洩同軸ケー
ブル装置２ａ，２ｂ，２ｃを介して車両１ａ，１ｂ，１
ｃと通信する中央処理局、４ａ，４ｂ，４ｃは漏洩同軸
ケーブル装置２ａ，２ｂ，２ｃと中央処理局３を接続す
る有線伝送路である。1 is a block diagram showing an embodiment of the present invention, in which 1a, 1b and 1c are vehicles traveling on a road, 2a and 2a.
b and 2c are leaky coaxial cable devices in which leaky coaxial cables are laid at predetermined intervals along the road, and 3 is vehicles 1a, 1b and 1 via leaky coaxial cable devices 2a, 2b and 2c.
Central processing stations 4a, 4b, 4c communicating with c are wire transmission lines connecting the leaky coaxial cable devices 2a, 2b, 2c and the central processing station 3.
【０００９】上記車両１ａ，１ｂ，１ｃはそれぞれ至近
の漏洩同軸ケーブル装置２ａ，２ｂ，２ｃと電波で通信
する車載機を搭載しており、この車載機は図２に示すよ
うにデータ制御部１１、信号処理部１２、自局識別番号
付与・識別部１３、送受信部１４およびアンテナ１５か
ら構成されている。上記漏洩同軸ケーブル装置２ａ，２
ｂ，２ｃは電波で上記車載機と通信すると共に有線伝送
路４ａ，４ｂ，４ｃを介して中央処理局３と通信するこ
とにより、上記車載機と中央処理局３との間にあって相
互の通信の仲立をするものである。この漏洩同軸ケーブ
ル装置２ａ，２ｂ，２ｃは図３に示すように、漏洩同軸
ケーブル装置２１、送受信部２２、自局識別番号付与・
識別処理部２３および有線伝送変換部２４から構成され
ている。上記中央処理局３は、外部からの各地点の降
雨、降雪、霧等の気象情報、地震情報、路面情報、道路
工事情報、速度規制情報、交通事故情報、渋滞情報等を
入力すると共に、漏洩同軸ケーブル装置２ａ，２ｂ，２
ｃを介して送られてくる走行中の車両１ａ，１ｂ，１ｃ
の走行速度、加速、行先等の監視情報を入力し、先行あ
るいは後続の車両の運転情報、渋滞情報、気象情報、緊
急情報等を関係車両に送信するものである。この中央処
理局３は図４に示すように有線伝送変換部３１、情報蓄
積部（イ）３２、情報整理・処理部３３、情報蓄積部
（ロ）３４、データ入力部３５、各部の動作を管理する
中央処理部（ＣＰＵ）３６および監視部・制御卓３７か
ら構成されている。なお、上記有線伝送路４ａ，４ｂ，
４ｃに代えて無線伝送路を用いてもよい。また、漏洩同
軸ケーブル装置２ａ，２ｂ，２ｃに代えて路車間情報シ
ステム路上ビーコン局を用いてもよい。Each of the vehicles 1a, 1b, 1c is equipped with an on-vehicle device that communicates with the nearby leaky coaxial cable devices 2a, 2b, 2c by radio waves. This on-vehicle device has a data controller 11 as shown in FIG. , A signal processing unit 12, a local station identification number assigning / identifying unit 13, a transmitting / receiving unit 14, and an antenna 15. The leaky coaxial cable devices 2a, 2
b and 2c communicate with the in-vehicle device by radio waves and communicate with the central processing station 3 via the wired transmission paths 4a, 4b and 4c, so that the in-vehicle device and the central processing station 3 can communicate with each other. It mediates. As shown in FIG. 3, each of the leaky coaxial cable devices 2a, 2b, and 2c has a leaky coaxial cable device 21, a transmitting / receiving unit 22, and an own station identification number.
It is composed of an identification processing unit 23 and a wired transmission conversion unit 24. The central processing station 3 inputs weather information such as rainfall, snowfall, and fog at each point from the outside, earthquake information, road surface information, road construction information, speed regulation information, traffic accident information, traffic congestion information, etc., and leaks them. Coaxial cable devices 2a, 2b, 2
Vehicles 1a, 1b, 1c that are traveling via c
It inputs monitoring information such as traveling speed, acceleration, destination, etc., and sends driving information, traffic jam information, weather information, emergency information, etc. of preceding or following vehicles to related vehicles. As shown in FIG. 4, the central processing station 3 performs operations of the wired transmission conversion unit 31, the information storage unit (a) 32, the information organization / processing unit 33, the information storage unit (b) 34, the data input unit 35, and each unit. It is composed of a central processing unit (CPU) 36 for managing and a monitoring unit / control console 37. The wired transmission lines 4a, 4b,
A wireless transmission path may be used instead of 4c. Further, a roadside-vehicle information system roadside beacon station may be used instead of the leaky coaxial cable devices 2a, 2b, 2c.
【００１０】次に本実施例の動作を図１乃至図４を用い
て説明する。車両１ａにおける車両の加速情報、速度情
報、車両接近情報、位置情報、行先情報等の監視情報は
車載機（図２）のデータ制御部１１により収集され、信
号処理部１２で所定の形式の信号に変換される。自局識
別番号付与・識別部１３は車両１ａに予め割当てられて
いる車両の識別番号を前記信号に付加し、送受信部１４
はこれを電波でアンテナ１５から送信する。車両１ｂ，
１ｃも同様にして自車の監視情報を送信する。Next, the operation of this embodiment will be described with reference to FIGS. Monitoring information such as vehicle acceleration information, speed information, vehicle approach information, position information, and destination information in the vehicle 1a is collected by the data control unit 11 of the vehicle-mounted device (FIG. 2), and the signal processing unit 12 outputs signals in a predetermined format. Is converted to. The own station identification number assigning / identifying unit 13 adds the vehicle identification number previously assigned to the vehicle 1a to the signal, and the transmitting / receiving unit 14
Transmits this from the antenna 15 by radio waves. Vehicle 1b,
1c similarly transmits the monitoring information of the own vehicle.
【００１１】車両１ａのアンテナ１５から送信された電
波は至近の漏洩同軸ケーブル装置２ａの漏洩同軸ケーブ
ル２１で受信される。なお、図１では、車両１ｂからの
電波は漏洩同軸ケーブル装置２ａの漏洩同軸ケーブル２
１で、車両１ｃからの電波は漏洩同軸ケーブル装置２ｂ
の漏洩同軸ケーブル２１でそれぞれ受信されることにな
る。漏洩同軸ケーブル２１で受信された電波は送受信部
２２で復調される。自局識別番号付与・識別処理部２３
は漏洩同軸ケーブル装置２ａに予め割当てられている識
別番号を上記の復調した信号に加え、有線伝送変換部２
４はこれを有線伝送に適した伝送信号に変換して有線伝
送路４ａに送出する。The radio wave transmitted from the antenna 15 of the vehicle 1a is received by the leaky coaxial cable 21 of the leaky coaxial cable device 2a which is located in the vicinity. In FIG. 1, radio waves from the vehicle 1b are leaked coaxial cable 2 of the leaky coaxial cable device 2a.
1, the radio wave from the vehicle 1c leaks to the coaxial cable device 2b.
The leaky coaxial cables 21 are received respectively. The electric wave received by the leaky coaxial cable 21 is demodulated by the transmitting / receiving unit 22. Own station identification number assignment / identification processing unit 23
Adds the identification number assigned in advance to the leaky coaxial cable device 2a to the demodulated signal, and
4 converts this into a transmission signal suitable for wired transmission and sends it to the wired transmission line 4a.
【００１２】中央処理局３の有線伝送変換部３１は有線
伝送路４ａからの伝送信号を受信して復調し、復調した
信号（監視信号、車両の識別番号、漏洩同軸ケーブル装
置の識別番号）を情報蓄積部（イ）３２に送出する。有
線伝送路４ｂ，４ｃからの伝送信号についても同様であ
る。情報蓄積部（イ）３２はこれらの信号を一時格納す
る。一方、情報整理・処理部３３は中央処理部（ＣＰ
Ｕ）３６の管理の下で、情報蓄積部（イ）３２に格納さ
れている信号を読み出し、重要度別に並べ変えて整理す
ると共に車両に特定の運転支援情報を提供すべきか否か
を予め定めてある手順に従って判断し、必要があれば直
ちにその情報を車両に提供する。例えば、車両１ａから
加速したとの監視情報を受けたとき該車両１ａに、車両
１ａの前方を走行する車両１ｂに接近しても良いか否か
の情報を提供すると共に、車両１ｂには後方を走行する
車両１ａが接近しているとの情報を提供する。この場
合、情報整理・処理部３３は車両１ｂの現在位置を、既
に入力してある情報、例えば車両１ｂの走行速度、行先
情報、道路状況等に基づいて予測し、予測した位置に対
応する漏洩同軸ケーブル装置の識別番号および車両１ｂ
の識別番号を、提供すべき情報に付して情報蓄積部
（イ）３２に出力する。情報蓄積部（イ）３２はこれを
一部格納する。有線伝送変換部３１は情報蓄積部（イ）
３２に格納されている情報を読み出し、伝送信号に変換
して所定の有線伝送路、例えば４ｂに送出する。The wire transmission converter 31 of the central processing station 3 receives the transmission signal from the wire transmission line 4a, demodulates it, and outputs the demodulated signal (monitoring signal, vehicle identification number, leaky coaxial cable device identification number). It is sent to the information storage unit (a) 32. The same applies to the transmission signals from the wired transmission lines 4b and 4c. The information storage section (a) 32 temporarily stores these signals. On the other hand, the information organization / processing unit 33 is a central processing unit (CP
Under the control of (U) 36, the signals stored in the information storage section (a) 32 are read out, rearranged in order of importance and organized, and whether or not to provide specific driving support information to the vehicle is determined in advance. Judge according to the specified procedure and provide the information to the vehicle immediately if necessary. For example, when the vehicle 1a receives the monitoring information indicating that the vehicle 1a is accelerated, the vehicle 1a is provided with information as to whether or not the vehicle 1b traveling in front of the vehicle 1a may be approached, and the vehicle 1b is provided with the rear information. It provides information that the vehicle 1a traveling on the road is approaching. In this case, the information organizing / processing unit 33 predicts the current position of the vehicle 1b based on the information already input, for example, the traveling speed of the vehicle 1b, the destination information, the road condition, and the like, and the leakage corresponding to the predicted position is performed. Identification number of coaxial cable device and vehicle 1b
And outputs it to the information storage section (a) 32 with the information to be provided. The information storage section (a) 32 partially stores this. The wired transmission conversion unit 31 is an information storage unit (a)
The information stored in 32 is read, converted into a transmission signal, and transmitted to a predetermined wired transmission path, for example, 4b.
【００１３】この有線伝送路４ｂに接続される漏洩同軸
ケーブル装置２ａは中央処理局３から送られて来た上記
の伝送信号を有線伝送変換部２４で受信して復調し、自
局識別番号付与・識別処理部２３で自局の漏洩同軸ケー
ブル装置の識別番号が付いていることを確認し、車両の
識別番号および運転支援情報のみを送受信部２２に送出
する。送受信部２２はこれを電波で漏洩同軸ケーブル２
１から送信する。The leaky coaxial cable device 2a connected to the wired transmission line 4b receives the above-mentioned transmission signal sent from the central processing station 3 by the wired transmission conversion unit 24 and demodulates it to give its own identification number. The identification processing unit 23 confirms that the identification number of the leaky coaxial cable device of its own station is attached, and sends only the identification number of the vehicle and the driving support information to the transmission / reception unit 22. The transmitter / receiver 22 leaks this by radio waves and the coaxial cable 2
Send from 1.
【００１４】車両１ｂは前記漏洩同軸ケーブル２１から
の電波を車載機のアンテナ１５、送受信部１４で受信し
て復調する。自局識別番号付与・識別部１３は自局の車
両識別番号が付してある運転支援情報のみを取り込んで
信号処理部１４に送出する。信号処理部１４はこの情報
に所定の処理を施し、データ制御部１１はこれを制御信
号として出力する。この制御信号は表示装置の表示や車
両の方向変更、速度制御、ブレーキ操作等の運転の制御
に使用される。The vehicle 1b receives the radio wave from the leaky coaxial cable 21 by the antenna 15 and the transmitting / receiving section 14 of the vehicle-mounted device and demodulates it. The own station identification number assigning / identifying unit 13 takes in only the driving support information to which the own vehicle identification number is attached and sends it to the signal processing unit 14. The signal processing unit 14 performs a predetermined process on this information, and the data control unit 11 outputs this as a control signal. This control signal is used to display the display device, change the direction of the vehicle, control the speed, and control driving such as braking.
【００１５】中央処理局３は「衝突回避」等の緊急事態
が発生した場合には割込み処理により緊急メッセージを
車両に送信する。When an emergency situation such as "collision avoidance" occurs, the central processing station 3 transmits an emergency message to the vehicle by interruption processing.
【００１６】また、中央処理局３はデータ入力部３５に
入力される気象情報、交通情報等を監視し、道路の渋
滞、地震の発生、路面凍結等の道路状態の変化について
警戒地域を走行または、走行しようとする車両に同時に
通知（同報通信方式）するメッセージを送信する。Further, the central processing station 3 monitors the weather information, traffic information, etc. input to the data input section 35, and travels in a caution area for changes in road conditions such as road congestion, earthquake occurrence, road surface freeze or the like. , Sends a message to notify the vehicle that is about to travel (broadcast communication method) at the same time.
【００１７】この同報通信メッセージには特定識別コー
ド（特番または共通コード）が付され、各車両はこの特
定識別コードを検出したとき同報通信メッセージである
と判断し、これを一斉に取り込むことができる。A specific identification code (special number or common code) is attached to this broadcast communication message, and when each vehicle detects this specific identification code, it is judged that it is a broadcast communication message and it is taken in all at once. You can
【００１８】さらに、中央処理局３は、各車両の行き先
を記憶しているため、「旅行時間」から判断して行き先
方向の遠距離であっても運転者に有用と判断する情報、
例えば道路状況を特定の車両に送信する。Further, since the central processing station 3 stores the destination of each vehicle, the information judged to be useful to the driver even if it is a long distance in the direction of the destination, judging from the "travel time",
For example, the road condition is transmitted to a specific vehicle.
【００１９】図１に示すシステムを複数の地域に設け、
各システムの中央処理局同士を通信回線で結ぶことによ
り、相互間での情報交換を可能にすれば、より遠くにお
ける車両の情報を提供することも可能となる。The system shown in FIG. 1 is provided in a plurality of areas,
If information can be exchanged by connecting the central processing stations of each system with a communication line, it becomes possible to provide information on vehicles at a farther distance.
【００２０】[0020]
【発明の効果】以上、詳細に説明したように本発明によ
れば、車々間通信に中央処理局を介在させたので次に示
す効果を得ることができる。As described above in detail, according to the present invention, since the central processing station is interposed in the inter-vehicle communication, the following effects can be obtained.
【００２１】（イ）直前の車両との通信に限定される事
なく、数台前方の車両の運転状況および遥か前方の道路
状況（交通事故の発生、路面の積雪、霧の発生、路面凍
結等々）を中央処理局から、走行車両に通報することが
出来る。(A) Not limited to the communication with the vehicle immediately before, the driving situation of several vehicles ahead and the road situation far ahead (the occurrence of a traffic accident, snowfall on the road surface, fog, freezing of the road surface, etc.) ) Can be reported to the traveling vehicle from the central processing station.
【００２２】（ロ）通信中の車両に対しても、緊急な場
合は、通話割り込みをおこなって、緊急同報通信（警戒
宣言の発表、地震発生の連絡等）を、通信網を利用して
いる車両に同時に通報出来る。(B) In the case of an emergency even for a vehicle in communication, a call interruption is made to perform emergency broadcast communication (announcement of warning declaration, notification of earthquake occurrence, etc.) using the communication network. You can report to existing vehicles at the same time.
【００２３】（ハ）車両の通話路に中央処理局が介在す
ることにより、中央処理局で広範囲に渡って走行してい
る車両からの各車両の車速、現在位置、走行方向、目的
地、運転状況（ブレーキの踏み具合、ターンシグナルの
様子、ハンドルの切り具合等）を入手して情報の蓄積処
理をすることが出来る。(C) By interposing the central processing station on the communication path of the vehicle, the vehicle speed, the current position, the traveling direction, the destination and the driving of each vehicle from the vehicles traveling over a wide range in the central processing station. It is possible to obtain the situation (brake depression, turn signal condition, steering wheel cut, etc.) and perform information accumulation processing.
【図１】本発明の実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.
【図２】車載機の構成図である。FIG. 2 is a configuration diagram of an in-vehicle device.
【図３】漏洩同軸ケーブル装置の構成図である。FIG. 3 is a configuration diagram of a leaky coaxial cable device.
【図４】中央処理局の構成図である。FIG. 4 is a configuration diagram of a central processing station.
１ａ、１ｂ、１ｃ 車両 ２ａ、２ｂ、２ｃ 漏洩同軸ケーブル装置 ３ 中央処理局 ４ 有線伝送路 1a, 1b, 1c Vehicles 2a, 2b, 2c Leaky coaxial cable device 3 Central processing station 4 Wired transmission line
Claims (1)
を交換する通信手段を設け、前記車両は自車の監視情報
を前記中央処理局に送信し、前記中央処理局は前記監視
情報および外部から入力される情報により運転支援情報
を生成して所定の車両に送信することを特徴とする車々
間通信方式。1. A communication means for exchanging information between a traveling vehicle and a central processing station is provided, said vehicle transmitting monitoring information of its own vehicle to said central processing station, and said central processing station said monitoring information. And a vehicle-to-vehicle communication system characterized by generating driving support information from information input from the outside and transmitting it to a predetermined vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4006554A JPH05191331A (en) | 1992-01-17 | 1992-01-17 | Communication system among vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4006554A JPH05191331A (en) | 1992-01-17 | 1992-01-17 | Communication system among vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05191331A true JPH05191331A (en) | 1993-07-30 |
Family
ID=11641556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4006554A Pending JPH05191331A (en) | 1992-01-17 | 1992-01-17 | Communication system among vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05191331A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004326791A (en) * | 2003-04-22 | 2004-11-18 | Samsung Electronics Co Ltd | Vehicle travel information exchanging method and system using inter-vehicle temporary radio network |
| JP2006279950A (en) * | 2005-03-29 | 2006-10-12 | Nec Corp | Method and system for information distribution in mobile ad hoc network |
| JP2009087372A (en) * | 2008-12-25 | 2009-04-23 | Mitsubishi Electric Corp | Road-to-vehicle communication system, and road-to-vehicle communication device |
| JP2009134729A (en) * | 2008-12-25 | 2009-06-18 | Mitsubishi Electric Corp | Road-to-vehicle communication apparatus |
-
1992
- 1992-01-17 JP JP4006554A patent/JPH05191331A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004326791A (en) * | 2003-04-22 | 2004-11-18 | Samsung Electronics Co Ltd | Vehicle travel information exchanging method and system using inter-vehicle temporary radio network |
| JP2006279950A (en) * | 2005-03-29 | 2006-10-12 | Nec Corp | Method and system for information distribution in mobile ad hoc network |
| JP2009087372A (en) * | 2008-12-25 | 2009-04-23 | Mitsubishi Electric Corp | Road-to-vehicle communication system, and road-to-vehicle communication device |
| JP2009134729A (en) * | 2008-12-25 | 2009-06-18 | Mitsubishi Electric Corp | Road-to-vehicle communication apparatus |
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| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19981110 |