JPH0573296B2 - - Google Patents
Info
- Publication number
- JPH0573296B2 JPH0573296B2 JP61289973A JP28997386A JPH0573296B2 JP H0573296 B2 JPH0573296 B2 JP H0573296B2 JP 61289973 A JP61289973 A JP 61289973A JP 28997386 A JP28997386 A JP 28997386A JP H0573296 B2 JPH0573296 B2 JP H0573296B2
- Authority
- JP
- Japan
- Prior art keywords
- radio
- antenna
- antennas
- train
- zone
- 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.)
- Expired - Fee Related
Links
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Near-Field Transmission Systems (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、マイクロ波帯以上の周波数を利用し
た列車無線システムに関し、詳しくは列車線路に
沿つて設置された無線中継局を介して列車内の移
動局との通信を行なう列車無線システムに関す
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a train radio system that uses frequencies above the microwave band, and more specifically, the present invention relates to a train radio system that uses frequencies above the microwave band. This invention relates to a train radio system that communicates with mobile stations.
［従来の技術］
従来、マイクロ波帯以上の無線周波数を利用し
た列車無線システムは、日本では商用化の例がな
く、第２図に示すような構想のみが提案されてい
るに過ぎなかつた。[Prior Art] Conventionally, there has been no example of commercialization of a train radio system using radio frequencies above the microwave band in Japan, and only the concept shown in Fig. 2 has been proposed.
第２図に示す列車無線システムは、二つのアン
テナを背中合せに配置した無線中継局を介して通
信を行なう構成のものである。図中の無線中継局
１０１，１０２，１０３，…は、利用周波数帯域
に応じた設置距離（数百ｍ〜数十Km）をおいて設
置されている。これら無線中継局１０１，１０
２，１０３，…は、それぞれ異なつた周波数で送
受信を行なう二台の無線機ａ，ｂを備え、一方を
第一アンテナ１に、他方を第二アンテナ２に接続
した構成である。上記第一アンテナ１と第二アン
テナ２は背中合せに配置されている。そして、隣
接する無線中継局間で対向する第一アンテナ１お
よび第二アンテナ２により無線中継局間をカバー
して電波領域が構成されている。 The train radio system shown in FIG. 2 has a configuration in which communication is performed via a radio relay station in which two antennas are arranged back to back. Radio relay stations 101, 102, 103, . . . in the figure are installed at a distance (several hundred meters to several tens of kilometers) depending on the frequency band used. These wireless relay stations 101, 10
2, 103, . . . are equipped with two radio devices a and b that perform transmission and reception at different frequencies, and one is connected to the first antenna 1 and the other is connected to the second antenna 2. The first antenna 1 and the second antenna 2 are arranged back to back. The first antenna 1 and the second antenna 2 facing each other between adjacent radio relay stations constitute a radio wave area that covers the area between the radio relay stations.
列車車載の移動局３は、第３図に示すごとく、
第一アンテナ１を介して通信するときの周波数
と、第二アンテナ２を介して通信するときの周波
数とを、区間，，…ごとに切換えて常に明
瞭な通信を行なうことができる。 The mobile station 3 mounted on the train is as shown in Fig. 3.
By switching the frequency for communicating via the first antenna 1 and the frequency for communicating via the second antenna 2 for each section, etc., it is possible to always perform clear communication.
［解決すべき問題点］
しかしながら、上記従来の列車無線システムで
は、第３図に示すごとく、移動局３が無線中継局
１０１，１０２，１０３，…に接近した地点にお
いて、電波のデツドゾーン（電波が届かない領
域）D1，D2，D3，…が存在する。そのために上
述したような区間，，，…ごとの切り替え
を行なうのであるが、ある区間を受け持つ無線中
継局の無線機に故障があつた場合は、このような
切り替えを行なわずに通信を続けることとなり、
上記電波のデツドゾーンにおいて電波の瞬断が起
こり、明瞭な通信ができないという問題があつ
た。[Problems to be Solved] However, in the conventional train radio system described above, as shown in FIG. 3, a radio wave dead zone (radio wave (areas that cannot be reached) D 1 , D 2 , D 3 , ... exist. For this purpose, switching is performed for each section, etc., as described above, but if the radio equipment of the wireless relay station that handles a certain section breaks down, it is necessary to continue communication without performing such switching. Then,
There was a problem that instantaneous interruptions of radio waves occurred in the radio wave dead zone, making clear communication impossible.
この問題点を第４図にもとづき具体的に詳述す
る。 This problem will be specifically explained in detail based on FIG.
第４図において、正常時には無線ゾーンの切り
替えは→→…と行なわれる。いま、例え
ば、ゾーンを受け持つべき無線器１０３ｂが故
障した場合、ゾーンを救済するために、ゾーン
を引き続き使用したとしても、正常時にはゾー
ンの電波によりカバーされていた無線中継局１
０３の近傍で瞬断が起こる。同様に、ゾーンを
受け持つべき無線器１０３ａが故障した場合も無
線中継局１０２の近傍で瞬断が起こる。 In FIG. 4, during normal operation, wireless zones are switched in the order of →→.... Now, for example, if the radio device 103b that is supposed to be in charge of a zone breaks down, even if the zone is continued to be used in order to save the zone, the wireless relay station 1 that was covered by the radio waves of the zone during normal operation
A momentary interruption occurs near 03. Similarly, if the wireless device 103a that is supposed to be in charge of the zone fails, a momentary power outage occurs in the vicinity of the wireless relay station 102.
本発明は上述した問題点にかんがみてなされた
もので、ある中継局の無線機が故障した場合で
も、電波を瞬断することなく明瞭な通信を行なう
ことのできる列車無線システムの提供を目的とす
る。 The present invention was made in view of the above-mentioned problems, and its purpose is to provide a train radio system that can perform clear communication without momentary interruption of radio waves even if the radio equipment at a relay station breaks down. do.
［問題点の解決手段］
上記目的を達成するために、本発明は、それぞ
れ異なる周波数で送受信を行なう第一、第二の無
線機と上記第一、第二の無線機に各々接続される
第一、第二のアンテナとを備えた無線中継局を列
車線路に沿つて設置し、上記無線中継局を介して
列車内の移動局との通信を行なう列車無線システ
ムであつて、隣接する無線中継局における第一の
アンテナどうし及び第二のアンテナどうしを、そ
の間の見通しを確保できる間隔で対向させるとと
もに、前記対向する第一アンテナどうしの間に隣
接する第二アンテナを配置し、かつ前記対向する
第二アンテナどうしの間に隣接する第一アンテナ
を配置し、さらに前記第一アンテナと第二アンテ
ナを異なる地上高及びビーム角度で設置した構成
としてある。[Means for Solving Problems] In order to achieve the above object, the present invention provides first and second radios that transmit and receive data at different frequencies, and a third radio that is connected to the first and second radios, respectively. A train radio system in which a radio relay station equipped with a first antenna and a second antenna is installed along a train track and communicates with a mobile station in a train via the radio relay station, and the radio relay station is connected to an adjacent radio relay station. The first antennas and the second antennas in the station are arranged to face each other at a distance that allows line of sight therebetween, and an adjacent second antenna is arranged between the facing first antennas, and the second antennas are arranged opposite to each other. Adjacent first antennas are disposed between second antennas, and the first antenna and second antenna are disposed at different ground heights and beam angles.
［実施例］
以下、本発明の一実施例について図面を参照し
て説明する。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は本実施例に係る列車無線システムを説
明するための図である。 FIG. 1 is a diagram for explaining a train radio system according to this embodiment.
図面において、１０１，１０２，１０３は列車
線路に沿つてそれぞれ設置された無線中継局で、
その設置間隔は利用周波数帯域に応じた距離を保
つている。これら無線中継局１０１，１０２，１
０３…は、異なる周波数（f1，r1とf2，r+）で送
受信を行なう第一、第二の無線機ａ，ｂと、この
無線機ａ，ｂに各々接続された第一、第二のアン
テナ１０，２０とを備えている。 In the drawing, 101, 102, and 103 are radio relay stations installed along the train tracks, respectively.
The installation intervals are kept at a distance that corresponds to the frequency band used. These wireless relay stations 101, 102, 1
03... are first and second radios a and b that transmit and receive at different frequencies (f 1 , r 1 and f 2 , r + ), and first and second radios connected to these radios a and b, respectively. and second antennas 10 and 20.
上記第一、第二のアンテナ１０，２０は、隣接
する無線中継局における第一のアンテナどうし及
び第二のアンテナどうしを、その間の見通しを確
保できる間隔で対向させて配置してある。また、
前記対向する第一アンテナどうしの間には隣接す
る第二アンテナを配置し、かつ前記対向する第二
アンテナどうしの間には隣接する第一アンテナを
配置してある。これにより、後述のごとく無線中
継局の近傍における電波のデツドゾーンを救済で
きるようになつている。 The first and second antennas 10 and 20 are arranged to face each other at intervals that allow line-of-sight between the first antennas and the second antennas of adjacent radio relay stations. Also,
An adjacent second antenna is arranged between the opposing first antennas, and an adjacent first antenna is arranged between the opposing second antennas. This makes it possible to relieve radio wave dead zones in the vicinity of wireless relay stations, as will be described later.
なおここで、見通しを確保できる間隔とは、単
独のアンテナで列車との通信を維持できる間隔
（第１図におけるゾーン＋，＋，＋
等）をいう。 Note that the interval at which line of sight can be secured is the interval at which communication with the train can be maintained using a single antenna (zones +, +, + in Figure 1).
etc.).
また、第一、第二のアンテナ１０，２０の地上
高及びビーム角度は異なつて設定してあり、これ
により、対向する一方のアンテナが送受信する電
波を他方のアンテナが遮断することを防止してい
る。 In addition, the ground height and beam angle of the first and second antennas 10 and 20 are set to be different, thereby preventing one of the opposing antennas from blocking the radio waves transmitted and received by the other antenna. There is.
さらに、見通しを確保できる間隔で対向する無
線中継局における第一のアンテナ１どうし及び第
二のアンテナ２どうしは異なる周波数で送受信す
る無線機ａ，ｂをそれぞれ接続してあるので、同
一ゾーン内における電波の干渉も回避できる。 Furthermore, since the first antennas 1 and the second antennas 2 of the radio relay stations facing each other at intervals that ensure line-of-sight are connected to radio equipment a and b that transmit and receive at different frequencies, Radio wave interference can also be avoided.
上述した構成の列車無線システムでは正常時
は、ゾーンを無線機１０１−ｂ、ゾーンを同
１０１−ａ、ゾーンを同１０２−ａ、ゾーン
を同１０２−ｂ、ゾーンを同１０３−ｂ、ゾー
ンを同１０３−ａでそれぞれ受け持つて通信を
維持していく。 In the train radio system configured as described above, during normal operation, the zone is the radio 101-b, the zone is the radio 101-a, the zone is the radio 102-a, the zone is the radio 102-b, the zone is the radio 103-b, and the zone is the radio 103-b. The same 103-a takes charge of each and maintains communication.
そして、仮りに無線機１０２−ｂが故障した場
合は、ゾーンを無線機１０２−ａと１０３−ｂ
とで受け持つことにより、電波のデツドゾーンを
回避して電波の瞬断を防止できる。また、無線機
１０２−ａが故障した場合は、ゾーンを無線機
１０１−ａと１０２−ｂとで受け持つことによ
り、電波のデツドゾーンを回避して瞬断を防止で
きる。他の無線機が故障した場合でも、同様にし
てデツドゾーンを回避することができる。 If the radio device 102-b is out of order, the zone is changed to the radio devices 102-a and 103-b.
By taking charge of this, it is possible to avoid dead zones of radio waves and prevent momentary interruptions of radio waves. Further, if the radio device 102-a is out of order, by having the radio devices 101-a and 102-b take over the zone, it is possible to avoid a radio wave dead zone and prevent instantaneous interruption. Even if other radios fail, a dead zone can be avoided in the same way.
［発明の効果］
以上説明したように本実施例によれば、ある中
継局の無線機が故障した場合でも、電波のデツド
ゾーンを回避して電波の瞬断を防ぎ、常に明瞭な
通信状態を維持できるという効果がある。[Effects of the Invention] As explained above, according to this embodiment, even if a radio device at a relay station breaks down, it is possible to avoid a dead zone of radio waves, prevent momentary interruption of radio waves, and always maintain a clear communication state. There is an effect that it can be done.
第１図は本発明の一実施例に係る列車無線シス
テムを説明するための図、第２図は従来の列車無
線システムの構成図、第３図は同システムの問題
点を説明するための図、第４図は同問題点の具体
例を説明するための図である。
１０１，１０２，１０３，…：無線中継局、
３：移動局、１０：第一のアンテナ、２０：第二
のアンテナ、ａ：第一の無線機、ｂ：第二の無線
機。
Fig. 1 is a diagram for explaining a train radio system according to an embodiment of the present invention, Fig. 2 is a block diagram of a conventional train radio system, and Fig. 3 is a diagram for explaining problems with the system. , FIG. 4 is a diagram for explaining a specific example of the same problem. 101, 102, 103,...: Wireless relay station,
3: mobile station, 10: first antenna, 20: second antenna, a: first radio, b: second radio.
Claims (1)
一、第二の無線機と上記第一、第二の無線機に
各々接続される第一、第二のアンテナとを備えた
無線中継局を列車線路に沿つて設置し、上記無線
中継局を介して列車内の移動局との通信を行なう
列車無線システムであつて、 隣接する無線中継局における第一のアンテナど
うし及び第二のアンテナどうしを、その間の見通
しを確保できる間隔で対向させるとともに、前記
対向する第一アンテナどうしの間に隣接する第二
アンテナを配置し、かつ前記対向する第二アンテ
ナどうしの間に隣接する第一アンテナを配置し、
さらに前記第一アンテナと第二アンテナを異なる
地上高及びビーム角度で設置したことを特徴とす
る列車無線システム。[Claims] 1. A radio relay comprising first and second radio devices that transmit and receive data at different frequencies, and first and second antennas connected to the first and second radio devices, respectively. A train radio system in which a station is installed along a train track and communicates with a mobile station in the train via the radio relay station, wherein the first antenna and the second antenna at adjacent radio relay stations are connected to each other. the first antennas are arranged to face each other at an interval that allows line of sight therebetween, and an adjacent second antenna is disposed between the facing first antennas, and the first antenna is adjacent between the facing second antennas. Place the
Furthermore, the train radio system is characterized in that the first antenna and the second antenna are installed at different ground heights and beam angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61289973A JPS63142728A (en) | 1986-12-04 | 1986-12-04 | Train radio system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61289973A JPS63142728A (en) | 1986-12-04 | 1986-12-04 | Train radio system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63142728A JPS63142728A (en) | 1988-06-15 |
| JPH0573296B2 true JPH0573296B2 (en) | 1993-10-14 |
Family
ID=17750124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61289973A Granted JPS63142728A (en) | 1986-12-04 | 1986-12-04 | Train radio system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63142728A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9835161B2 (en) | 2012-02-27 | 2017-12-05 | Mitsubishi Heavy Industries Compressor Corporation | Rotary machine |
-
1986
- 1986-12-04 JP JP61289973A patent/JPS63142728A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9835161B2 (en) | 2012-02-27 | 2017-12-05 | Mitsubishi Heavy Industries Compressor Corporation | Rotary machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63142728A (en) | 1988-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |