JP2001250136A - Roadside radio monitor method in automatic toll collection system - Google Patents

Roadside radio monitor method in automatic toll collection system

Info

Publication number
JP2001250136A
JP2001250136A JP2000061993A JP2000061993A JP2001250136A JP 2001250136 A JP2001250136 A JP 2001250136A JP 2000061993 A JP2000061993 A JP 2000061993A JP 2000061993 A JP2000061993 A JP 2000061993A JP 2001250136 A JP2001250136 A JP 2001250136A
Authority
JP
Japan
Prior art keywords
roadside
radio wave
vehicle
roadside device
radio
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.)
Withdrawn
Application number
JP2000061993A
Other languages
Japanese (ja)
Inventor
Kazuya Kishi
和也 岸
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP2000061993A priority Critical patent/JP2001250136A/en
Publication of JP2001250136A publication Critical patent/JP2001250136A/en
Withdrawn legal-status Critical Current

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  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Traffic Control Systems (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a roadside radio monitor method for an automatic toll collection system which can speedily detect a fault of an ETC roadside device, shorten a repair time, reduce maintenance cost, and improve an operating efficiency of an ETC system. SOLUTION: For the roadside radio monitor method for the automatic toll collection system, an on-vehicle unit 1 is provided with a means which transmits the reception level of a radio wave from a roadside device 11 and the current speed of the vehicle to the roadside device 11 in a guard time before FCMS and the roadside device 11 knows the position in a communication area 8 when the on-vehicle unit 11 receives the radio wave level of transmit data of the device 11 and its radio wave and makes a comparison with the radio wave level in a normal state to monitor the roadside device 11 by radio.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、自動料金収受(E
lectronic Toll Collectio
n:以下、ETCという)システムにおける路側無線監
視方法に関するものである。
The present invention relates to an automatic toll collection (E)
electronic Toll Collection
n: hereinafter referred to as ETC).

【0002】[0002]

【従来の技術】従来のETCシステムでは、ETC路側
無線装置の無線機能の確認は、該当装置が設置されてい
る現場に測定装置を持参した測定員が赴き、夜間等車両
の通行量が少ない時に一部車線を封鎖し、実際の電波状
態を測定するものであった。
2. Description of the Related Art In a conventional ETC system, the radio function of an ETC roadside radio device is checked when a measuring person who brought the measuring device goes to a site where the device is installed and the traffic of a vehicle is small such as at night. Some lanes were blocked, and the actual radio wave condition was measured.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記し
た従来の方法では、ETC路側無線装置の無線機能を常
時監視できる訳ではなく、異常が発生したとしてもすぐ
に検知できなかった。つまり、故障検知に時間がかか
り、MTTR(Mean Time To Repai
r:修理できるまでの平均時間)が長くなっていた。ま
た、測定する際には車線を一部封鎖しなければ作業が行
えなかったし、測定員による作業のため、時間及びコス
トがかかるという問題点があった。
However, in the above-described conventional method, the wireless function of the ETC roadside wireless device cannot always be monitored, and even if an abnormality occurs, it cannot be detected immediately. That is, it takes time to detect a failure, and the MTTR (Mean Time To Replace)
r: average time to repair). In addition, when performing the measurement, the work cannot be performed unless the lane is partially closed, and there is a problem that it takes time and cost because the work is performed by the measurement staff.

【0004】本発明は、上記問題点を除去し、ETC路
側装置の故障を迅速に検知することができ、修復時間の
短縮を図るとともに、メンテナンスのコストを低減し、
ETCシステムの稼働率の向上を図り得る自動料金収受
システムにおける路側無線監視方法を提供することを目
的とする。
[0004] The present invention eliminates the above problems, can quickly detect the failure of the ETC roadside device, shorten the repair time, reduce the maintenance cost,
It is an object of the present invention to provide a roadside wireless monitoring method in an automatic toll collection system that can improve the operation rate of an ETC system.

【0005】[0005]

【課題を解決するための手段】本発明は、上記目的を達
成するために、〔1〕自動料金収受システムにおける路
側無線監視方法において、車載器が路側装置からの電波
受信レベルとその時の車両の車速をFCMS前のガード
タイム中に前記路側装置に送信する手段を設け、前記路
側装置が自らの送信データの電波レベルとその電波を車
載器が受信したときの通信エリア内の位置を知り、正常
な状態の電波レベルと比較することにより、前記路側装
置の無線の監視を行うことを特徴とする。
In order to achieve the above object, the present invention provides: [1] a roadside wireless monitoring method in an automatic toll collection system, comprising: A means for transmitting the vehicle speed to the roadside device during the guard time before FCMS is provided. The roadside device knows the radio wave level of its own transmission data and the position in the communication area when the onboard unit receives the radio wave, and The radio wave level of the roadside device is monitored by comparing with a radio wave level in a normal state.

【0006】[0006]

【発明の実施の形態】以下、本発明の実施の態様につい
て詳細に説明する。
Embodiments of the present invention will be described below in detail.

【0007】図1は本発明の実施例を示すETCシステ
ム模式図、図2は路側無線監視装置のブロック図であ
り、図2(a)はETC車載器の構成図、図2(b)は
ETC路側装置の構成図である。
FIG. 1 is a schematic diagram of an ETC system showing an embodiment of the present invention, FIG. 2 is a block diagram of a roadside wireless monitoring device, FIG. 2 (a) is a configuration diagram of an on-board ETC device, and FIG. It is a lineblock diagram of an ETC roadside device.

【0008】図1に示すように、本発明のETCシステ
ムは、主にETC車載器1とETC路側装置11との間
での無線通信により行われる。なお、6,7は車両検知
器、8は通信エリア、9はアンテナ、10は車両を示し
ている。
As shown in FIG. 1, the ETC system of the present invention is mainly performed by wireless communication between the on-board ETC device 1 and the ETC roadside device 11. In addition, 6 and 7 are vehicle detectors, 8 is a communication area, 9 is an antenna, and 10 is a vehicle.

【0009】まず、図2(a)に示すように、ETC車
載器1は無線部2と車速検出部5で構成される。その無
線部2は実際に無線の送受信を行う送受信部3と受信し
ている電波の受信レベルを検出する受信レベル検出部4
で構成される。
First, as shown in FIG. 2A, the on-board ETC device 1 includes a radio unit 2 and a vehicle speed detecting unit 5. The radio unit 2 includes a transmission / reception unit 3 for actually transmitting / receiving a radio signal and a reception level detection unit 4 for detecting a reception level of a received radio wave.
It consists of.

【0010】一方、図2(b)に示すように、ETC路
側装置11は、無線の送受信を行う無線部12と車両位
置を把握できる車両検知器6,7に接続された車両位置
検出部13とETC路側装置11の機能が正常であるか
を監視する監視部14で構成される。
On the other hand, as shown in FIG. 2 (b), the ETC roadside apparatus 11 includes a wireless unit 12 for performing wireless transmission and reception and a vehicle position detecting unit 13 connected to vehicle detectors 6 and 7 capable of ascertaining the vehicle position. And a monitoring unit 14 that monitors whether the function of the ETC roadside apparatus 11 is normal.

【0011】次に、DSRC(狭域通信:Dedica
ted Short−rangeCommunicat
ion)通信プロトコルにおけるフレーム構成の一例を
図3を参照しながら説明する。
Next, DSRC (Narrow Area Communication: Dedica)
ted Short-rangeCommunicat
(ion) An example of a frame configuration in the communication protocol will be described with reference to FIG.

【0012】まず、ダウンリンク(ETC路側装置から
ETC車載器への通信)は、100オクテットのFCM
S(フレムコントロールメッセージスロット)21、各
100オクテットのMDS(メッセージデータスロッ
ト)22〜25から構成され、アップリンク(ETC車
載器からETC路側装置への通信)は、各100オクテ
ットのMDS32〜34と、100オクテットのACT
S(アクチベーションスロット)35から構成されてい
る。そのFCMS21前には28オクテットのガードタ
イム31Aが設けられている。なお、21AはFCMC
(フレムコントロールメッセージチャネル)、22A,
25A,33A,34AはMDC(メッセージデータチ
ャネル)、23A,24A,32A,35DはACKC
(アックチャネル)、35A,35B,35CはACT
C(アクチベーションチャネル)である。
First, the downlink (communication from the ETC roadside apparatus to the ETC on-board unit) is a 100 octet FCM.
S (frame control message slot) 21 and MDSs (message data slots) 22 to 25 each of 100 octets, and the uplink (communication from the on-board ETC to the ETC roadside device) is connected to MDSs 32 to 34 of each 100 octets. , 100 octet ACT
S (activation slot) 35. A guard time 31A of 28 octets is provided in front of the FCMS 21. 21A is FCMC
(Frame control message channel), 22A,
25A, 33A and 34A are MDC (message data channel), 23A, 24A, 32A and 35D are ACKC
(ACK channel), 35A, 35B, 35C are ACT
C (activation channel).

【0013】以下、ETC路側無線監視の動作の説明を
行う。
Hereinafter, the operation of the ETC roadside radio monitoring will be described.

【0014】ETC路側装置11が正常であれば、DS
RC通信エリアに常に一定レベルの電波を発射してい
る。一方、ETC車載器1は、DSRC通信エリア内で
通信を行うために通信エリア内かどうかを判断する基準
として、無線部2内に受信レベル検出部4を備えてい
る。また、自車の車速を把握するために車速検出部5も
備えている。
If the ETC roadside apparatus 11 is normal, DS
A constant level radio wave is always emitted into the RC communication area. On the other hand, the on-board ETC device 1 includes a reception level detection unit 4 in the radio unit 2 as a criterion for judging whether the vehicle is in the communication area in order to perform communication in the DSRC communication area. In addition, a vehicle speed detection unit 5 is provided to grasp the vehicle speed of the own vehicle.

【0015】また、ETC車載器1は、図3に示したD
SRC通信プロトコル内のFCMS(フレームコントロ
ールメッセージスロット)21前の28オクテットのガ
ードタイム31A内において、受信レベル検出部4が検
出したETC路側装置11の電波受信レベルと車速検出
部5が検出した自車の車速情報をETC路側装置11に
送信する。
Further, the on-board ETC device 1 has the D
Within a 28 octet guard time 31A before the FCMS (Frame Control Message Slot) 21 in the SRC communication protocol, the radio wave reception level of the ETC roadside device 11 detected by the reception level detection unit 4 and the vehicle detected by the vehicle speed detection unit 5 Is transmitted to the ETC roadside device 11.

【0016】ETC路側装置11は、通信データのフレ
ーム長を自装置内で把握している。すなわち、ETC車
載器1が送出してくる前述の電波受信レベルと自車の車
速の2つのデータの送出間隔時間はフレーム長の時間に
相当するので自装置内で把握できる。
The ETC roadside device 11 knows the frame length of the communication data in its own device. That is, since the transmission interval time of the two data of the above-mentioned radio wave reception level and the vehicle speed transmitted from the on-board ETC device 1 corresponds to the frame length time, it can be grasped in the own device.

【0017】また、ETC路側装置11は車両検知器
6,7からの信号でETC車載器1がいつ車両検知器
6,7を通過したかが分かる。
The ETC roadside device 11 can determine when the vehicle-mounted ETC 1 has passed the vehicle detectors 6 and 7 based on signals from the vehicle detectors 6 and 7.

【0018】また、前述のようにETC車載器1からは
車速データが送信されてくるので、フレーム長の時間に
より送信データ毎のETC車載器1の移動距離を計算す
ることができる。
Since the vehicle speed data is transmitted from the vehicle-mounted ETC 1 as described above, the moving distance of the vehicle-mounted ETC 1 for each transmission data can be calculated based on the time of the frame length.

【0019】したがって、車両検知器6,7を中心とし
て、ETC車載器1から送信された電波受信レベルがど
の位置のものか把握することができる。
Therefore, it is possible to know the position of the radio wave reception level transmitted from the vehicle-mounted ETC device 1 with the vehicle detectors 6 and 7 at the center.

【0020】監視部14は、正常時の電波受信レベルと
距離との相関データと、このETC車載器1が送信して
きたデータを比較することにより、ETC路側装置11
が送信している電波のレベルが正常の値かどうかを判断
できる。
The monitoring unit 14 compares the correlation data between the radio wave reception level and the distance in the normal state with the data transmitted by the on-board ETC device 1 to thereby provide the ETC roadside device 11.
Can determine whether the level of the radio wave being transmitted is a normal value.

【0021】このように、本発明によれば、ETC車載
器1がDSRCの通信エリア内に進入してくると、ET
C路側装置11が自装置の送信データのレベルを把握で
きるので、ETC路側装置11の故障を迅速に検知で
き、MTTRの短縮につながる。また、測定員を現地に
派遣して車線の封鎖等もする必要がなくなるのでメンテ
ナンスのコストも低減することができ、ETCシステム
の稼働率の向上を図ることができる。
As described above, according to the present invention, when the on-board ETC 1 enters the DSRC communication area, the ET
Since the C roadside device 11 can grasp the level of the transmission data of the own device, the failure of the ETC roadside device 11 can be quickly detected, which leads to a reduction in MTTR. In addition, since it is not necessary to send a measuring person to the site to block a lane or the like, maintenance costs can be reduced, and the operation rate of the ETC system can be improved.

【0022】なお、本発明は上記実施例に限定されるも
のではなく、本発明の趣旨に基づいて種々の変形が可能
であり、これらを本発明の範囲から排除するものではな
い。
It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

【0023】[0023]

【発明の効果】以上、詳細に説明したように、本発明に
よれば、以下のような効果を奏することができる。
As described above, according to the present invention, the following effects can be obtained.

【0024】(A)ETC車載器がDSRCの通信エリ
ア内に進入してくると、ETC路側装置が自装置の送信
データのレベルを把握できるので、ETC路側装置の故
障を迅速に検知することができ、MTTRの短縮につな
がる。
(A) When the on-board ETC device enters the DSRC communication area, the ETC roadside device can grasp the level of the transmission data of the own device, so that the failure of the ETC roadside device can be quickly detected. And lead to a reduction in MTTR.

【0025】(B)測定員を現地に派遣して車線の封鎖
等もする必要がなくなるのでメンテナンスのコストも低
減することができ、ETCシステムの稼働率の向上を図
ることができる。
(B) Since there is no need to send a measuring person to the site to block a lane or the like, maintenance costs can be reduced and the operation rate of the ETC system can be improved.

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

【図1】本発明の実施例を示すETCシステム模式図で
ある。
FIG. 1 is a schematic diagram of an ETC system showing an embodiment of the present invention.

【図2】本発明の実施例を示すETC路側無線監視装置
のブロック図である。
FIG. 2 is a block diagram of an ETC roadside wireless monitoring apparatus according to an embodiment of the present invention.

【図3】DSRC通信プロトコルの説明図である。FIG. 3 is an explanatory diagram of a DSRC communication protocol.

【符号の説明】[Explanation of symbols]

1 ETC車載器 2,12 無線部 3 送受信部 4 受信レベル検出部 5 車速検出部 6,7 車両検知器 8 通信エリア 9 アンテナ 10 車両 11 ETC路側装置 13 車両位置検出部 14 監視部 21 FCMS(フレムコントロールメッセージスロ
ット) 21A FCMC(フレムコントロールメッセージチ
ャネル) 22〜25,32〜35 MDS(メッセージデータ
スロット) 22A,25A,33A,34A MDC(メッセー
ジデータチャネル) 23A,24A,32A,35D ACKC(アック
チャネル) 31 空きスロット 31A ガードタイム 35 ACTS(アクチベーションスロット) 35A,35B,35C ACTC(アクチベーショ
ンチャネル)
REFERENCE SIGNS LIST 1 on-board ETC device 2, 12 radio unit 3 transmission and reception unit 4 reception level detection unit 5 vehicle speed detection unit 6, 7 vehicle detector 8 communication area 9 antenna 10 vehicle 11 ETC roadside device 13 vehicle position detection unit 14 monitoring unit 21 FCMS (Frame Control message slot) 21A FCMC (Frame control message channel) 22-25, 32-35 MDS (Message data slot) 22A, 25A, 33A, 34A MDC (Message data channel) 23A, 24A, 32A, 35D ACKC (ACK channel) 31 Empty slot 31A Guard time 35 ACTS (activation slot) 35A, 35B, 35C ACTC (activation channel)

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 自動料金収受システムにおける路側無線
監視方法において、 車載器が路側装置からの電波受信レベルとその時の車両
の車速をFCMS前のガードタイム中に前記路側装置に
送信する手段を設け、前記路側装置が自らの送信データ
の電波レベルとその電波を車載器が受信したときの通信
エリア内の位置を知り、正常な状態の電波レベルと比較
することにより、前記路側装置の無線の監視を行うこと
を特徴とする自動料金収受システムにおける路側無線監
視方法。
1. A roadside wireless monitoring method in an automatic toll collection system, wherein a vehicle-mounted device transmits a radio wave reception level from a roadside device and a vehicle speed at that time to the roadside device during a guard time before FCMS, The roadside device monitors the radio level of the roadside device by knowing the radio wave level of its own transmission data and the position in the communication area when the vehicle-mounted device receives the radio wave, and comparing it with the radio wave level in a normal state. A roadside wireless monitoring method in an automatic toll collection system, wherein the method is performed.
JP2000061993A 2000-03-07 2000-03-07 Roadside radio monitor method in automatic toll collection system Withdrawn JP2001250136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000061993A JP2001250136A (en) 2000-03-07 2000-03-07 Roadside radio monitor method in automatic toll collection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000061993A JP2001250136A (en) 2000-03-07 2000-03-07 Roadside radio monitor method in automatic toll collection system

Publications (1)

Publication Number Publication Date
JP2001250136A true JP2001250136A (en) 2001-09-14

Family

ID=18582058

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000061993A Withdrawn JP2001250136A (en) 2000-03-07 2000-03-07 Roadside radio monitor method in automatic toll collection system

Country Status (1)

Country Link
JP (1) JP2001250136A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010135913A (en) * 2008-12-02 2010-06-17 Sumitomo Electric Ind Ltd Deterioration detecting system and deterioration detection method
JP2016148616A (en) * 2015-02-13 2016-08-18 沖電気工業株式会社 Communication device, communication system and communication method
CN112070918A (en) * 2020-07-23 2020-12-11 深圳市金溢科技股份有限公司 ETC portal monitoring facilities and ETC portal monitoring system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010135913A (en) * 2008-12-02 2010-06-17 Sumitomo Electric Ind Ltd Deterioration detecting system and deterioration detection method
JP2016148616A (en) * 2015-02-13 2016-08-18 沖電気工業株式会社 Communication device, communication system and communication method
CN112070918A (en) * 2020-07-23 2020-12-11 深圳市金溢科技股份有限公司 ETC portal monitoring facilities and ETC portal monitoring system

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