JPS6362423A - Over land mobile communication system - Google Patents
Over land mobile communication systemInfo
- Publication number
- JPS6362423A JPS6362423A JP61207331A JP20733186A JPS6362423A JP S6362423 A JPS6362423 A JP S6362423A JP 61207331 A JP61207331 A JP 61207331A JP 20733186 A JP20733186 A JP 20733186A JP S6362423 A JPS6362423 A JP S6362423A
- Authority
- JP
- Japan
- Prior art keywords
- mobile station
- antenna
- base station
- transmitter
- mobile communication
- 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.)
- Pending
Links
- 238000010295 mobile communication Methods 0.000 title claims description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000005684 electric field Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000005562 fading Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Classifications
-
- Y02B60/50—
Landscapes
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は陸上移動通信における電波伝搬の制御方式に
関するものであるっ
〔従来の技術〕
第３図は従来の陸上移動通信方式の一例を示す概略図で
あり、図において、（１）は基地局、（２）は移動局で
ある。第４図は従来の陸上移動通信方式の移動局の構成
を示すブロック図であり、図において、（３）は水平面
内無指向性のホイップ形アンテナ、（４）はデュプレス
・フィルタ、（５）は送信機、（６）は受信機、（７）
は無線機制御部である。[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for controlling radio wave propagation in land mobile communication. [Prior Art] Fig. 3 shows an example of a conventional land mobile communication system. It is a schematic diagram, in which (1) is a base station and (2) is a mobile station. FIG. 4 is a block diagram showing the configuration of a conventional land mobile communication system mobile station. In the figure, (3) is an omnidirectional whip-shaped antenna in the horizontal plane, (4) is a duplex filter, and (5) is the transmitter, (6) is the receiver, (7)
is the radio control section.
次に動作について説明する。基地局（１）と移動局（２
）との間で発呼又は着呼が成功し通話チャンネルがロッ
クされた後基地局（１）は移動局（２）から送信される
電界強度を常時監視し、そのレベルの大小により、移動
局（２）に対してパワー・コントロール・メツセージを
送出する。移動局（２）はこのパワー・コントロール・
メツセージをアンテナ（３）、デュブレクス・フィルタ
（４）、受信機（６）を介して受信解読し、その信号内
容に応じて制御部（７）は送信機（５）の送信出力を制
御する。Next, the operation will be explained. Base station (1) and mobile station (2)
) After the call is successfully made or received and the communication channel is locked, the base station (1) constantly monitors the electric field strength transmitted from the mobile station (2), and depending on the magnitude of the field strength, the mobile station Sends a power control message to (2). The mobile station (2) uses this power control
A message is received and decoded via an antenna (3), a dubrex filter (4), and a receiver (6), and a control section (7) controls the transmission output of a transmitter (5) according to the signal content.
従来の陸上移動通信方式における移動局は以上のように
無指向性アンテナを用いて構成されているので、交信中
の基地局以外の四方六方の方向にも電波を送出するため
、大きな送信電力が必要で消費電力が大さく、他の局へ
の妨害でチャンネルの有効利用の妨げにな９、さらにマ
ルチパス・フエージジグの影響により通話品質を悪化さ
せるなでの問題点があった。Mobile stations in conventional land mobile communication systems are configured using omnidirectional antennas as described above, so they transmit radio waves in all directions other than the base station with which they are communicating, requiring large transmission power. This has the problem of requiring a large amount of power, interfering with other stations and hindering the effective use of channels9, and further deteriorating call quality due to the effects of multipath phasing.
この発明は上記のような問題点を解消するためになされ
たもので、消費電力を低く抑え、チャンイ・ル（周波数
）の有効利用ができ、さらにマルチパス・フェージング
の起こりにくい陸上移動通信方式を得ることを目的とす
る。This invention was made to solve the above-mentioned problems, and it is possible to reduce power consumption, make effective use of channels (frequency), and create a land mobile communication system that is less prone to multipath fading. The purpose is to obtain.
この発明に係る陸上移動通信方式における移動局は水平
面における指向性を変化し得るアンテナ系とこのアンテ
ナ系を制御する無線機制御部を備えたものである。A mobile station in a land mobile communication system according to the present invention is equipped with an antenna system whose directivity in a horizontal plane can be changed, and a radio control unit that controls the antenna system.
この発明における移動局の制御部およびアンテナ系は基
地局からのパワー・コントロール・メツセージによりア
ンテナの水平面における主ビーム方向を走査し基地局に
おける受信電界レベルが最大どなるようアンテナ・パタ
ーンを固定するため移動局からの送信出力は交信中の基
地局方向に集中して送出される。The control unit and antenna system of the mobile station in this invention scan the main beam direction in the horizontal plane of the antenna in response to power control messages from the base station, and move to fix the antenna pattern so that the received electric field level at the base station is the maximum. The transmission output from the station is concentrated in the direction of the base station with which it is communicating.
以下、この発明の一実施例を図について説明する。第１
図はこの発明に係る陸上移動通信方式の１例を示す概略
図、第２図はこの発明に係る陸上移動通信方式の移動局
の構成を示すブロック図である。第１図において、（１
）は基地局、（２（は移動局である。第２図において、
（４）はデュプレクス・フィルタ、（５）は送信機、（
６）は受信機、（７）は無線機制御部、（８ａ−／）は
方射状に配置された垂直偏波コーナ・フレフタ・アンテ
ナ、（９）は上記アンテナ（８ａ−／）に接続され、熱
線機制御部（７）からの信号により上記アンテナ（８ａ
−／）のいずれか１つとデュブレクス・フィルタ（４）
を接続するアンテナ切換器である。An embodiment of the present invention will be described below with reference to the drawings. 1st
FIG. 2 is a schematic diagram showing an example of a land mobile communication system according to the present invention, and FIG. 2 is a block diagram showing the configuration of a mobile station of the land mobile communication system according to the present invention. In Figure 1, (1
) is a base station, (2 ( is a mobile station. In Fig. 2,
(4) is a duplex filter, (5) is a transmitter, (
6) is a receiver, (7) is a radio control unit, (8a-/) is a vertically polarized corner fleft antenna arranged in a radial pattern, and (9) is connected to the above antenna (8a-/). The antenna (8a) is activated by a signal from the hot wire machine control section (7).
-/) and Dubrex filter (4)
This is an antenna switching device that connects the
次に本発明の動作について説明する。基地局ｆｉ＋の動
作については従来と変わりないが、移動局＋２１側では
受信した基地局ｆｉ＋からのパワーコシトロール・メツ
セージによシ無線機制御部（７）は送信機（５）だけで
はなくアンテナ切換器（９）を制御する。制御プロセス
としては例えば、送信機（５）の出力を一定にして詔き
、アンテナ（８８〜８／）の接続を順次切換えていきそ
の都度受信したパワー・コシトロール・メツセージを制
御部（７）により判断してアンテナ指向性を交信中の基
地局１１＋に対し最良の状態に固定した後さらに送信機
（５）を制御し送信出力を適正レベルに調節する。この
状態では従来の無指向性アンテナを用いた場合と較べて
、垂直面内のアンテナ指向性半値幅が同じならアンテナ
系の利得があるため、送信機（５）の出力を下げること
が出来、消費電力が少なくなシ、又アンテナのビームが
狭められているため、移動局（２）からの送信波の多重
反射成分が減少すると同時に反射波の位相ズレが少な（
なるため基地局（１１においてマルチパスフェージング
の影響が大幅に改善される。移動局（２）の受信に関し
ては送受周波数の違いのため、移動局（２）の送信が最
良の状態で受信レベルが最大になるとは必ずしも言えな
いが大きな建物等の障害物が比較的少ない地区において
は基地局（１）と移動局（２）の間がほとんど直接波の
みによりつながれるため受信にとってもやはり最良の状
態となる。尚、移動局＋２１の受信の際にこうむるマル
チパス・フェージングについても送信の場合同様指向性
アンテナによりビームが狭められているためいかなる場
所にいようとマルチバスフェージングの影響は必ず軽減
される。またアンテナのビームが狭いため他の局を妨害
することがなく、チャンネルの有効利用が図れる。Next, the operation of the present invention will be explained. The operation of the base station fi+ is the same as before, but on the mobile station +21 side, the radio control unit (7) handles not only the transmitter (5) but also the antenna. Controls the switch (9). As a control process, for example, the output of the transmitter (5) is kept constant, the connections of the antennas (88 to 8/) are sequentially switched, and the power cositrol message received each time is sent to the controller (7). After determining and fixing the antenna directivity to the best condition for the communicating base station 11+, the transmitter (5) is further controlled to adjust the transmission output to an appropriate level. In this state, compared to the case where a conventional omnidirectional antenna is used, the output of the transmitter (5) can be lowered because there is a gain in the antenna system if the antenna directivity half width in the vertical plane is the same. Since the power consumption is low, and the antenna beam is narrowed, the multiple reflection components of the transmitted wave from the mobile station (2) are reduced, and at the same time, the phase shift of the reflected wave is small (
As a result, the effects of multipath fading at the base station (11) are greatly improved.As for the reception of the mobile station (2), due to the difference in transmitting and receiving frequencies, the reception level of the mobile station (2) is at its best when the transmission is at its best. Although it cannot necessarily be said to be the maximum, in areas where there are relatively few obstacles such as large buildings, the base station (1) and mobile station (2) are connected almost exclusively by direct waves, so it is still the best condition for reception. As for the multipath fading that occurs when receiving mobile station +21, since the beam is narrowed by the directional antenna as in the case of transmission, the effect of multipath fading is always reduced no matter where you are. Also, since the antenna beam is narrow, it does not interfere with other stations, allowing for effective use of the channel.
なお、上記実施例ではコーナ・リフレクタ・アンテナ（
８ａ−／）として６個のアンテナを放射状に配置したが
、２個以上であれば使用可能であるが、コーナ・リフレ
クタ・アンテナの反射板角度としては９０°、 ６０”
が一般に使われていることから、４個あるいは６個が好
ましい。In addition, in the above embodiment, the corner reflector antenna (
8a-/), six antennas are arranged radially, but two or more antennas can be used, but the reflector angle of the corner reflector antenna is 90°, 60".
Since this is commonly used, 4 or 6 is preferable.
な詔上記実施例ではコーナ・リフレクタ・アンテナ（８
ａ−／）およびアンテナ切換器（９（を用いたがこれら
のかわりに複数の水平面内無指向性アンテナとこれらの
アンテナの給電部における位相制御を行なう位相制御部
を用いることにより、フェーズドアレイとして水平面内
の主ビーム方向を制御し同様の効果を奏することもでき
る。In the above embodiment, a corner reflector antenna (8
a-/) and an antenna switcher (9), but by using a plurality of omnidirectional antennas in the horizontal plane and a phase control unit that controls the phase in the feeding section of these antennas instead, it can be used as a phased array. A similar effect can also be achieved by controlling the main beam direction in the horizontal plane.
以上述べたように、この発明によれば移動局（２１のア
シガナ系に指向性ア〉テナを用いその主ビームを最適の
方向に制御するように構成したので、移動局の消費電力
節約・電波の有効利用ができ、の
フェージング影響の少ない高品質の陸上移動通信方式が
得られる。As described above, according to the present invention, a directional antenna is used in the mobile station (21 side-by-side systems) and the main beam is controlled in the optimum direction. This provides a high-quality land mobile communication system that makes effective use of , and is less affected by fading.
ｖＪ１図はこの発明の一実施例による概略図、第２図は
この発明の移動局側の構成図、第３図は従来の陸上移動
通信の概略図、第４図は従来の移動局の構成図である。
図において、（１１は基地局、（２）は移動局、（３）
はホイップ形アンテナ、（４）はデエプレクス・フィル
り、（５ｊは送信機、（６）は受信機、（７１は無線機
制御部（８ａ−／’） コーナ・リフレクタ・ア〉テ
ナ、（９）はアンテナ切換器である。
なお、図中同一符号は同一、又は相当部分を示す。Figure vJ1 is a schematic diagram of an embodiment of the present invention, Figure 2 is a configuration diagram of the mobile station side of the invention, Figure 3 is a schematic diagram of conventional land mobile communication, and Figure 4 is the configuration of a conventional mobile station. It is a diagram. In the figure, (11 is the base station, (2) is the mobile station, (3)
is a whip antenna, (4) is a deplex filter, (5j is a transmitter, (6) is a receiver, (71 is a radio control unit (8a-/'), corner reflector antenna, (9 ) is an antenna switching device. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
局に送り返す機能を有する基地局と、この基地局からの
データにより送信出力およびアンテナ主ビーム方向を制
御する制御部とこの制御部からの電気的信号に呼応して
自らの水平面内指向特性を変化し得るアンテナ系を備え
た移動局とからなる陸上移動通信方式。A base station that has a function of determining the transmission electric field strength from a mobile station and sending the data back to the mobile station, a control unit that controls the transmission output and antenna main beam direction based on the data from this base station, and a control unit that controls the transmission output and antenna main beam direction based on the data from this base station. A land mobile communication system consisting of a mobile station equipped with an antenna system that can change its horizontal directivity characteristics in response to electrical signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61207331A JPS6362423A (en) | 1986-09-02 | 1986-09-02 | Over land mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61207331A JPS6362423A (en) | 1986-09-02 | 1986-09-02 | Over land mobile communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6362423A true JPS6362423A (en) | 1988-03-18 |
Family
ID=16537979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61207331A Pending JPS6362423A (en) | 1986-09-02 | 1986-09-02 | Over land mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6362423A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0457523A (en) * | 1990-06-27 | 1992-02-25 | Mitsubishi Electric Corp | Antenna switching system |
| JPH07288496A (en) * | 1994-04-19 | 1995-10-31 | Nec Corp | Radio communication system |
| KR100299128B1 (en) * | 1998-06-12 | 2001-11-05 | 윤종용 | Apparatus and method for power control bit pattern transmission and reception according to transmission antenna in mobile communication system |
| US6744823B1 (en) | 1998-12-24 | 2004-06-01 | Sumitomo Electric Industries, Ltd. | Communication system between road and vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS553728U (en) * | 1978-06-21 | 1980-01-11 | ||
| JPS6084030A (en) * | 1983-05-30 | 1985-05-13 | Nippon Telegr & Teleph Corp <Ntt> | Transmission output control system in mobile communication |
-
1986
- 1986-09-02 JP JP61207331A patent/JPS6362423A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS553728U (en) * | 1978-06-21 | 1980-01-11 | ||
| JPS6084030A (en) * | 1983-05-30 | 1985-05-13 | Nippon Telegr & Teleph Corp <Ntt> | Transmission output control system in mobile communication |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0457523A (en) * | 1990-06-27 | 1992-02-25 | Mitsubishi Electric Corp | Antenna switching system |
| JPH07288496A (en) * | 1994-04-19 | 1995-10-31 | Nec Corp | Radio communication system |
| KR100299128B1 (en) * | 1998-06-12 | 2001-11-05 | 윤종용 | Apparatus and method for power control bit pattern transmission and reception according to transmission antenna in mobile communication system |
| US6744823B1 (en) | 1998-12-24 | 2004-06-01 | Sumitomo Electric Industries, Ltd. | Communication system between road and vehicle |
| US7286610B2 (en) | 1998-12-24 | 2007-10-23 | Sumitomo Electric Industries, Ltd. | Roadway communication system |
| US7286611B2 (en) | 1998-12-24 | 2007-10-23 | Sumitomo Electric Industries, Ltd. | Roadway communication system |
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