JPS58138135A - Radio communication system - Google Patents
Radio communication systemInfo
- Publication number
- JPS58138135A JPS58138135A JP57020753A JP2075382A JPS58138135A JP S58138135 A JPS58138135 A JP S58138135A JP 57020753 A JP57020753 A JP 57020753A JP 2075382 A JP2075382 A JP 2075382A JP S58138135 A JPS58138135 A JP S58138135A
- Authority
- JP
- Japan
- Prior art keywords
- electric field
- station
- fixed station
- fixed
- stations
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
Abstract
Description
【発明の詳細な説明】
〔発明の属する分野〕
本発明は移動無線通信方式に関する。特に、移動局と複
数の固定局との選択接続方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a mobile radio communication system. In particular, it relates to a selective connection method between a mobile station and a plurality of fixed stations.
一般に移動局と通信を行うために多数の固定局を配置す
る場合には、周波数の有効利用の−Ｉ−〃１自。Generally, when a large number of fixed stations are arranged to communicate with mobile stations, effective use of frequencies is required.
ある距離をおいて同一周波数を使用することが１］われ
る。通常この距離は移動局からの電波が複数の固定局に
同時には届かないようにきめられるが、フェージング等
の影響や地形の複離さのため、複数の固定局に同時に受
信されることが起きる場合がある。It is possible to use the same frequency at a certain distance. Normally, this distance is determined so that the radio waves from the mobile station do not reach multiple fixed stations at the same time, but due to effects such as fading or the separation of the terrain, it may happen that the radio waves are received by multiple fixed stations at the same time. There is.
例えば添伺図面の（が＊ ｆｌ、ｌ第１図において、固
定局１と２があり、移動局４は固定局２の作動圏内であ
るが、固定局１にも弱い電波が届いているとする。また
従来例の第２図は各固定局の受信装置のブロックダイヤ
−７゛あり、受信入力は、ミギツー回路５、中間周波増
幅回り各６を通り、［界検出回路９で検出さね、電界情
報送出回路１０で入力電界が基準レベルより高いとき電
界検出情報「１」を送出する。７け彷調回路、８は低周
波増幅回路である。For example, in Figure 1 of the accompanying drawing, there are fixed stations 1 and 2, and mobile station 4 is within the operating range of fixed station 2, but weak radio waves are also reaching fixed station 1. In addition, in FIG. 2 of the conventional example, there is a block diagram 7 of the receiving device of each fixed station, and the receiving input passes through a migi2 circuit 5, an intermediate frequency amplification circuit 6, and is not detected by the field detection circuit 9. , the electric field information sending circuit 10 sends electric field detection information "1" when the input electric field is higher than the reference level. 7 is a wandering circuit, and 8 is a low frequency amplification circuit.
い゛ま、移動局４」：り発呼があり固定局２には高い入
力電界が入り、固定局１には基準レベルは越えているが
、低い入力電界があるとすると、固定局１．２からはほ
ぼ同時に市、谷検出情報［１」が通信回線１ａ、２ａを
介Ｌ７て制御局３に送出される。Now, let's say that mobile station 4 makes a call and fixed station 2 receives a high input electric field, and fixed station 1 exceeds the reference level but has a low input electric field. At almost the same time, city and valley detection information [1] is sent from 2 to the control station 3 via communication lines 1a and 2a via L7.
通常、制御局３では時分割にて各固定局からの電界検出
情報を順次監視している。その１１１序が固定局１の方
が固定局２よりも早いとすると、光に固定局１の電界検
出情報「１」を確ｇ］７、この固定局１を通して通信回
路を構成してしチい、棒からの固定局２からの同じ移動
局からの１Ｍ５界検出情報は受は付けなくなる。Normally, the control station 3 sequentially monitors electric field detection information from each fixed station in a time-division manner. Assuming that the 111 order is faster for fixed station 1 than for fixed station 2, confirm that the electric field detection information of fixed station 1 is "1" in the light g]7, and configure a communication circuit through this fixed station 1. 1M5 field detection information from the same mobile station from the fixed station 2 will no longer be accepted.
すなわち、電、界の高い固定局があるにもかかわらず電
界の低い固定局を通して移動局との間の通信回線を構成
してしまい、通信の品質が悪くなる欠点を有していた。That is, even though there is a fixed station with a high electric field, a communication line with a mobile station is configured through a fixed station with a low electric field, resulting in poor communication quality.
本発明は上述の欠点を除去し、高い通信品質の無線通信
方式を提供することを目的とする。The present invention aims to eliminate the above-mentioned drawbacks and provide a wireless communication system with high communication quality.
この目的のため、本発明における無線通信方式は、同一
周波数を使用する検数の固定局の内の一局と移動局とを
選択接続する場合において、該固定局名々の受信入力電
界の強さに反比例し２て笥、界検出情報の送出を遅延さ
せることにより、最も受信入力電界の強い固定局と移動
局を接続することを特徴とするものである。For this purpose, in the wireless communication system of the present invention, when a mobile station is selectively connected to one of a number of fixed stations that use the same frequency, the received input electric field strength of each of the fixed stations is This system is characterized in that the mobile station is connected to the fixed station with the strongest received input electric field by delaying the transmission of the field detection information in inverse proportion to the field detection information.
以下、本発明を図画を参照して実施例により説明する。 Hereinafter, the present invention will be explained by examples with reference to drawings.
従来例と同一図面符号の部分は名称、機能も同じである
。Parts with the same drawing numbers as in the conventional example have the same names and functions.
第３図は本発明の実施例固定局の受信装置のブロック図
であり、電界情報送出回路の出力側にゲート回路を設け
るとともに、その入力側と上記ゲート回路との間に、゛
Ｉ′Ｉ］変時定数回路を結合したものである。第４図は
回線構成を示す図である。FIG. 3 is a block diagram of a receiver for a fixed station according to an embodiment of the present invention, in which a gate circuit is provided on the output side of the electric field information sending circuit, and between the input side and the gate circuit, ] This is a combination of variable time constant circuits. FIG. 4 is a diagram showing the line configuration.
第３図において、電界検出回路９の一部は可変時定数回
路１２に送られ、入力電界の強さに応じて時定数を変化
させ、ゲート回路１１のゲートを開く時刻を制御する。In FIG. 3, a part of the electric field detection circuit 9 is sent to a variable time constant circuit 12, which changes the time constant according to the strength of the input electric field to control the time when the gate of the gate circuit 11 is opened.
また電界情報送出回路１０は、基準レベル以上の入力電
界があったときその出力「１−１をゲート回路１１に送
り、このゲート回路１１が開いたとき制御局３へ向けて
その信号を送出する。Further, the electric field information sending circuit 10 sends the output ``1-1'' to the gate circuit 11 when there is an input electric field equal to or higher than the reference level, and sends the signal to the control station 3 when the gate circuit 11 is opened. .
すなわち入力電界が高ければ早くゲートが開き電界情報
出力「１」が早く制御局に送られ、入力電界が低ければ
ゲートを開く時刻がおくれ、電界情報出力「１」もおそ
く制御局に送られることになる。In other words, if the input electric field is high, the gate will open earlier and the electric field information output "1" will be sent to the control station sooner, and if the input electric field is lower, the gate opening time will be delayed and the electric field information output "1" will also be sent to the control station later. become.
第４図において、移動局４は固定局２の作動１＠内にあ
るとすると、制御局３は常時固定局１．２の電界検出情
報の「０」「１」を監視するため２・りの局の間を切替
えているが、どちらかの固定局の電界検出情報出力が「
０」から１１」に変わると、その固定局との接続動作を
行う。いま、固定局１．２から制御局３への連絡回線内
のおくれ時間がそれぞれＴ１、Ｔ２でＴ１キＴ２と設定
すると、固定局１の電界検出情報は固定局２の情報より
おくれて送出されるように可変時定数回路１２が入力電
界の強さにより設定されるので、常に固定局２の方に接
続動作が行われ通信回線が構成され、固定局１の方の電
界検出情報は無視される。In FIG. 4, assuming that the mobile station 4 is within the operation 1@ of the fixed station 2, the control station 3 constantly monitors the electric field detection information "0" and "1" of the fixed station 1.2. I am switching between fixed stations, but the electric field detection information output of one of the fixed stations is "
When the value changes from 0'' to 11'', a connection operation with that fixed station is performed. Now, if the delay time in the communication line from fixed station 1.2 to control station 3 is set as T1 and T2, respectively, the electric field detection information of fixed station 1 will be sent out later than the information of fixed station 2. Since the variable time constant circuit 12 is set according to the strength of the input electric field so that the fixed station 2 is always connected, the communication line is configured, and the electric field detection information from the fixed station 1 is ignored. Ru.
なお上述の実施例ではＴ１キＴ２の場合で説明したが、
Ｔ１＼Ｔ２のときはその時間差を含めて可変時定数回路
の時定数を設定すれば良い。In addition, in the above embodiment, the case of T1 and T2 was explained, but
When T1\T2, the time constant of the variable time constant circuit may be set including the time difference.
１だ上述は固定局２局の場合で説明したが、これは複数
局であれは何局でも良く、その電界検出回路もノイズ検
出等入力電界に応じて変化するものであれば何でも良い
。1. The above description is based on the case of two fixed stations, but any number of stations may be used, and the electric field detection circuit may be any type as long as it changes according to the input electric field, such as noise detection.
本発明によれば、より電界の高い固定局との間で回線の
接続が行われるので非常に高い品質の通信回線が構成さ
れることになる。According to the present invention, since a line is connected to a fixed station with a higher electric field, a very high quality communication line is constructed.
第１図は従来例の回線構成図。
第２図は同上の受信装置のブロック構成図。
第３図は本発明の実施例の受信装置のブロック構成図。
第４図は同上の回線構成図。
１．２・・・固定局、３・・・制御局、４・・・移動局
、５・・・ミキサー回路、６・・・中間周波増幅回路、
７・・・復調回路、８・・・低周波増幅回路、９・・・
電界検出回路、１０・・・電界情報送出回路、１１・・
・ゲート回路、１２可変時定数回路。FIG. 1 is a circuit configuration diagram of a conventional example. FIG. 2 is a block diagram of the receiving device same as above. FIG. 3 is a block diagram of a receiving device according to an embodiment of the present invention. FIG. 4 is a circuit configuration diagram same as above. 1.2...Fixed station, 3...Control station, 4...Mobile station, 5...Mixer circuit, 6...Intermediate frequency amplification circuit,
7... Demodulation circuit, 8... Low frequency amplifier circuit, 9...
Electric field detection circuit, 10... Electric field information sending circuit, 11...
・Gate circuit, 12 variable time constant circuit.
Claims (1)
局と移動局との間を選択接続する無線通信方式において
、上記固定局には、受（Ｎ電界を検出する手段と、この
手段の検出出力に応じる遅延時間で電界検出情報の送出
を遅延させる手段とを備乏−たことを特徴とする無線通
信方式。(1) In a wireless communication system in which a mobile station is selectively connected to one of a plurality of fixed stations that use the same frequency, the fixed station has a means for detecting a received (N electric field) and a means for detecting a received (N electric field). 1. A wireless communication system comprising: a means for delaying transmission of electric field detection information by a delay time corresponding to a detection output of the wireless communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57020753A JPS58138135A (en) | 1982-02-10 | 1982-02-10 | Radio communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57020753A JPS58138135A (en) | 1982-02-10 | 1982-02-10 | Radio communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58138135A true JPS58138135A (en) | 1983-08-16 |
Family
ID=12035943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57020753A Pending JPS58138135A (en) | 1982-02-10 | 1982-02-10 | Radio communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58138135A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62135028A (en) * | 1985-12-06 | 1987-06-18 | Fujitsu Ltd | Automatic line selection system |
| WO2000001178A1 (en) * | 1998-06-30 | 2000-01-06 | Matsushita Electric Industrial Co., Ltd. | Radio communication device and method |
-
1982
- 1982-02-10 JP JP57020753A patent/JPS58138135A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62135028A (en) * | 1985-12-06 | 1987-06-18 | Fujitsu Ltd | Automatic line selection system |
| WO2000001178A1 (en) * | 1998-06-30 | 2000-01-06 | Matsushita Electric Industrial Co., Ltd. | Radio communication device and method |
| AU734503B2 (en) * | 1998-06-30 | 2001-06-14 | Matsushita Electric Industrial Co., Ltd. | Apparatus and method for radio communications |
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