JPH0763157B2 - Tunnel wireless communication system - Google Patents
Tunnel wireless communication systemInfo
- Publication number
- JPH0763157B2 JPH0763157B2 JP60245406A JP24540685A JPH0763157B2 JP H0763157 B2 JPH0763157 B2 JP H0763157B2 JP 60245406 A JP60245406 A JP 60245406A JP 24540685 A JP24540685 A JP 24540685A JP H0763157 B2 JPH0763157 B2 JP H0763157B2
- Authority
- JP
- Japan
- Prior art keywords
- base station
- tunnel
- tunnel section
- section
- mobile 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.)
- Expired - Fee Related
Links
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Near-Field Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、列車無線システムあるいは高速道路用無線シ
ステムなどのサービスエリアが線状の無線通信システム
に関する。Description: TECHNICAL FIELD The present invention relates to a wireless communication system having a linear service area such as a train wireless system or a highway wireless system.
従来、この種の無線通信システムでは送受信装置の送信
出力がどの区間においても同一となつていた。Conventionally, in this type of wireless communication system, the transmission output of the transmission / reception device is the same in any section.
上述した従来の無線通信システムは、トンネル区間のよ
うに電波が伝搬しにくい区間においても送信出力が一定
となつており、変化させることができないため、基地局
送受信装置の設置数を減少させることができない欠点が
ある。In the above-described conventional wireless communication system, the transmission output is constant even in a section where radio waves are difficult to propagate, such as a tunnel section, and it cannot be changed. Therefore, it is possible to reduce the number of base station transceiver devices installed. There is a drawback that cannot be done.
上記課題を解決するために本発明では、トンネル区間内
に配設されたトン区間内基地局と、トンネル区間外に配
設された地上基地局と、トンネル区間内を走行する移動
局と、トンネル区間内基地局と移動局とを無線回線によ
り回線接続する漏洩線路とを備えるトンネル無線通信シ
ステムにおいて、トンネル区間内基地局が、移動局がト
ンネル区間内を走行していることを通報する通報信号を
出力するとともに、トンネル区間内基地局の移動局への
送信出力が、地上基地局の送信出力よりも大きく設定さ
れている。In order to solve the above problems, in the present invention, a ton section base station arranged in a tunnel section, a ground base station arranged outside the tunnel section, a mobile station traveling in the tunnel section, and a tunnel. In a tunnel radio communication system including a leak line that connects a base station in a section and a mobile station by a wireless line, a base station in the tunnel section informs that the mobile station is traveling in the tunnel section. And the transmission output of the base station in the tunnel section to the mobile station is set to be larger than the transmission output of the terrestrial base station.
移動局が、通報信号を受信するとトンネル区間内基地局
の送信出力と等しい送信出力に切り替えることにより、
移動局が、地上基地局との送受信出力よりも大きい送受
信出力でトンネル区間内基地局との通信を行う。When the mobile station receives the notification signal and switches to a transmission output equal to the transmission output of the base station in the tunnel section,
The mobile station communicates with the base station in the tunnel section at a transmission / reception output larger than that of the terrestrial base station.
したがつて、トンネル区間に設置される基地局送受信装
置の数が少なくてすみ、無線通信システムの経済化が図
れる。Therefore, the number of base station transceiver devices installed in the tunnel section can be reduced, and the wireless communication system can be made economical.
本発明の実施例について図面を参照して説明する。 Embodiments of the present invention will be described with reference to the drawings.
第１図は、本発明のトンネル無線通信システムの一実施
例を示すブロック図である。本実施例では送信出力の制
御を無線回線を通して行なう。FIG. 1 is a block diagram showing an embodiment of the tunnel radio communication system of the present invention. In this embodiment, the transmission output is controlled via a wireless line.
トンネル区間の基地局送受信装置３は、地上区間の基地
局送受信装置１より大きい送信出力（例えば10倍）が設
定されている。出力制御信号発生装置６は、トンネル２
内に配置され、送信出力制御信号fAを漏洩同軸ケーブル
４を介して送信している。移動局送受信装置５は、トン
ネル内に入り送信出力制御信号fAを受信すると、制御信
号fAと今までの出力状態の論理状態から送信出力を変化
させてトンネル区間の基地局送受信装置３と同程度の出
力とし、回線品質を上り／下りとも合わせる。The base station transceiver device 3 in the tunnel section is set to have a transmission output (for example, 10 times) larger than that of the base station transceiver device 1 in the ground section. The output control signal generator 6 is the tunnel 2
The transmission output control signal f A is arranged in the inside and is transmitted through the leaky coaxial cable 4. When the mobile station transmitter / receiver 5 enters the tunnel and receives the transmission output control signal f A , the mobile station transmitter / receiver 5 changes the transmission output from the control signal f A and the logical state of the output state up to now, and the base station transmitter / receiver 3 in the tunnel section. The output is about the same, and the line quality is matched for both upstream and downstream.
第２図は本発明の他の実施例で、移動体が列車であり、
移動局の送信出力の制御を列車信号設備と共に配置した
出力制御信号発生装置７から送出される送信出力制御信
号fAによつて行なうものである。FIG. 2 shows another embodiment of the present invention in which the moving body is a train,
The transmission output of the mobile station is controlled by the transmission output control signal f A sent from the output control signal generator 7 arranged with the train signal equipment.
以上説明したように本発明は、電波が伝搬しにくいトン
ネル区間における移動局送受信装置の送信出力を地上区
間の送信出力よりも増大させることにより、トンネル区
間の基地局送受信装置の設置数を減少させ、無線通信シ
ステムを経済的かつ簡易に構成できる効果がある。As described above, the present invention reduces the number of base station transceiver devices installed in the tunnel section by increasing the transmission output of the mobile station transceiver apparatus in the tunnel section where radio waves are difficult to propagate compared with the transmission output of the ground section. There is an effect that the wireless communication system can be configured economically and easily.
第１図，第２図は、本発明のトンネル無線通信システム
の一実施例を示すブロック図である。 １……地上区間の基地局送受信装置,2……トンネル,3…
…トンネル区間の基地局送受信装置,4……漏えい同軸ケ
ーブル（LCX）,5……移動局送受信装置,6……出力制御
信号発生装置,7……出力制御信号発生装置，fA……送信
出力制御信号。1 and 2 are block diagrams showing an embodiment of the tunnel radio communication system of the present invention. 1 ... Base station transceiver unit on the ground section, 2 ... Tunnel, 3 ...
… Base station transceiver in tunnel section, 4 …… Leaky coaxial cable (LCX), 5 …… Mobile station transceiver, 6 …… Output control signal generator, 7 …… Output control signal generator, f A …… Transmission Output control signal.
Claims (1)
内基地局と、前記トンネル区間外に配設された地上基地
局と、前記トンネル区間内を走行する移動局と、前記ト
ンネル区間内基地局と前記移動局とを無線回線により回
線接続する漏洩線路とを備えるトンネル無線通信システ
ムにおいて、 前記トンネル区間内基地局が、前記移動局がトンネル区
間内を走行していることを通報する通報信号を出力する
とともに、前記トンネル区間内基地局の前記移動局への
送信出力が、前記地上基地局の送信出力よりも大きく設
定されており、 前記移動局が、前記通報信号を受信すると前記トンネル
区間内基地局の送信出力と等しい送信出力に切り替える
ことにより、前記移動局が、前記地上基地局との送受信
出力よりも大きい送受信出力で前記トンネル区間内基地
局との通信を行うとを特徴とするトンネル無線通信シス
テム。1. A base station in a tunnel section arranged in a tunnel section, a terrestrial base station arranged outside the tunnel section, a mobile station running in the tunnel section, and a base in the tunnel section. In a tunnel radio communication system comprising a station and a leak line connecting the mobile station with a radio line, a notification signal for the base station in the tunnel section to report that the mobile station is traveling in the tunnel section. And the transmission output of the base station in the tunnel section to the mobile station is set to be larger than the transmission output of the terrestrial base station, the mobile station receives the notification signal, the tunnel section By switching to a transmission output equal to the transmission output of the inner base station, the mobile station can transmit and receive the tunnel with a transmission and reception output higher than that of the terrestrial base station. Tunnel radio communication system, wherein the communicating with the section in the base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60245406A JPH0763157B2 (en) | 1985-10-31 | 1985-10-31 | Tunnel wireless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60245406A JPH0763157B2 (en) | 1985-10-31 | 1985-10-31 | Tunnel wireless communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62104327A JPS62104327A (en) | 1987-05-14 |
| JPH0763157B2 true JPH0763157B2 (en) | 1995-07-05 |
Family
ID=17133176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60245406A Expired - Fee Related JPH0763157B2 (en) | 1985-10-31 | 1985-10-31 | Tunnel wireless communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0763157B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4918431A (en) * | 1988-10-31 | 1990-04-17 | Motorola, Inc. | Method and apparatus for automatically adjusting the output power of a transmitter |
| JPH0661900A (en) * | 1992-04-21 | 1994-03-04 | Nec Corp | Mobile body satellite communication system |
-
1985
- 1985-10-31 JP JP60245406A patent/JPH0763157B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62104327A (en) | 1987-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5404570A (en) | Radio coverage in closed environments | |
| EP0732814A3 (en) | Bidirectional satellite communication system with sharing of a same frequency band through superposition of signal frequencies | |
| EP0567889A3 (en) | System for bidirectional data transmission between several fixed stations and one mobile station. | |
| US3760278A (en) | Limited range radiocommunication system | |
| US2921979A (en) | Microwave transmission and receiving systems | |
| US2398741A (en) | Signaling system | |
| JPH0763157B2 (en) | Tunnel wireless communication system | |
| JPS62126726A (en) | On-vehicle relay method for automobile telephone set | |
| JPS5842329A (en) | Video transmitter | |
| JPS56112156A (en) | Loop communication system | |
| JPH08298473A (en) | Antenna system | |
| JPS62219725A (en) | Radio information offering system | |
| JPH0522207A (en) | Protection radio system | |
| AU694827B2 (en) | Radiating H.F. cable arrangement | |
| SE9202124D0 (en) | PROCEDURE AND DEVICE FOR RADIO COMMUNICATION WITH FREQUENCY DIVERSITY | |
| JPH0533082Y2 (en) | ||
| DE3463430D1 (en) | Radio communication system for transmitting local information | |
| JPH03293826A (en) | Communication equipment in mobile object | |
| JPH02171037A (en) | Satellite communication system in tunnel | |
| JPS6077532A (en) | Transmitter of mobile body information | |
| JPS57192146A (en) | Radio zone switching system | |
| JPH025199A (en) | Road side communication system | |
| JPS561635A (en) | Mobile radio communication system to train | |
| JPS6022834A (en) | Transmitter of information for moble body | |
| JPH0823294A (en) | Transportation vehicle radio rebroadcast system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |