JP2944196B2 - MCA satellite relay system - Google Patents
MCA satellite relay systemInfo
- Publication number
- JP2944196B2 JP2944196B2 JP32596090A JP32596090A JP2944196B2 JP 2944196 B2 JP2944196 B2 JP 2944196B2 JP 32596090 A JP32596090 A JP 32596090A JP 32596090 A JP32596090 A JP 32596090A JP 2944196 B2 JP2944196 B2 JP 2944196B2
- Authority
- JP
- Japan
- Prior art keywords
- satellite relay
- base station
- station
- control data
- mca
- 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
Landscapes
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はMCA陸上移動無線システムのサービスエリア
拡大に寄与するための中継方式に関する。Description: TECHNICAL FIELD The present invention relates to a relay system for contributing to expansion of a service area of an MCA land mobile radio system.
（従来の技術） MCA陸上移動無線システムは，無線基地局１局当たり
のサービスエリアを広くすることが要求される大ゾーン
方式の無線システムであるが，無線基地局の設置条件に
よってサービスエリア内に不感地域が発生し，その解決
策が必須となっている。(Prior art) The MCA land mobile radio system is a large zone radio system that requires a wide service area per radio base station. A blind area has arisen, and its solution is indispensable.
また,MCA陸上移動無線システムは，複数の通話チャネ
ルを複数の端末局が時分割的に使用するマルチチャネル
アクセス方式の無線システムであり，通話チャネルと端
末局の管理のための制御チャネルのデータ通信を行なっ
ている。The MCA land mobile radio system is a multi-channel access type radio system in which a plurality of terminal stations use a plurality of communication channels in a time-division manner. Are doing.
（発明が解決しようとする課題） ところで，サービスエリア内の不感地を解消するには
無線基地局を増設すればよい。しかし,MCA陸上移動無線
システムでは無線基地局毎に閉じた通信範囲が設定され
る。このため、不感地に設置した無線基地局と基本の無
線基地局間の端末局相互の通信は出来ず，実質的なサー
ビスエリア拡大対策とはならない。(Problems to be Solved by the Invention) By the way, in order to eliminate blind spots in the service area, the number of radio base stations may be increased. However, in the MCA land mobile radio system, a closed communication range is set for each radio base station. For this reason, communication between the terminal stations between the wireless base station installed in the blind spot and the basic wireless base station cannot be performed, and this is not a substantial measure for expanding the service area.
本発明はこれらの点を考慮してなされたもので，サー
ビスエリア拡大を簡便な方法で実現できるサテライト中
継方式を提供するものである。The present invention has been made in consideration of these points, and provides a satellite relay system capable of realizing service area expansion by a simple method.
（課題を解決するための手段） 本発明は,MCA無線システムのサテライト中継局で制御
チャネルを通して伝送する制御データを周波数変換で中
継する方式であって，無線基地局では該無線基地局で使
用する制御データとサテライト中継局で使用する制御デ
ータとを交互に送出することで無線基地局の端末とサテ
ライト中継局の端末間の通信の中継を可能とすることを
特徴とするMCAサテライト中継方式である。(Means for Solving the Problems) The present invention is a method of relaying, by frequency conversion, control data transmitted through a control channel in a satellite relay station of an MCA wireless system, and the wireless base station uses the control data in the wireless base station. An MCA satellite relay system characterized in that control data and control data used by a satellite relay station are alternately transmitted to enable relaying of communication between a radio base station terminal and a satellite relay station terminal. .
（実施例） 本発明の実施例を原理と共に説明する。(Example) An example of the present invention will be described together with the principle.
本発明が適用されるサテライト中継方式とは，第１図
に示す通り，無線基地局からの周波数F1の電波をサテラ
イト中継局で受信してそのまま周波数をF1′に変換して
から端末局へ信号を伝達し，端末局からの周波数F2′の
信号をサテライト中継局経由で周波数F2に変換してから
無線基地局に伝達することで通信を中継する方式であ
る。The satellite relay system to which the present invention is applied, as shown in FIG. 1, the terminal station a radio wave frequencies F 1 from the radio base station as it is frequency received at the satellite relay station after converting the F 1 ' This is a method in which a signal is transmitted to a base station, a signal of a frequency F 2 ′ from a terminal station is converted to a frequency F 2 via a satellite relay station, and then transmitted to a radio base station to relay communication.
MCA陸上移動無線システムの場合も通話チャネルの中
継については上記方式で対応可能である。しかし，制御
チャネルは制御データの内容が，第２図，第３図に示す
通り，無線基地局から送信される場合と端末局から送信
される場合とで異なる。例えば，無線基地局から送信さ
れる制御データには無線基地局固有の周波数データが入
っており，そのままではサテライト中継局の周波数デー
タとは異なるのでシステムとして動作しない。In the case of the MCA land mobile radio system, the above-mentioned method can be used for relaying the communication channel. However, as shown in FIGS. 2 and 3, the control channel differs in the content of the control data between the case where it is transmitted from the radio base station and the case where it is transmitted from the terminal station. For example, the control data transmitted from the radio base station contains frequency data unique to the radio base station, and does not operate as a system since it is different from the frequency data of the satellite relay station as it is.
この対策として，サテライト中継局に於いて周波数デ
ータを変換する方法も考えられるが，サテライト中継局
が無線基地局と同程度またはそれ以上複雑となり経済的
でない。As a countermeasure, a method of converting frequency data in a satellite relay station is conceivable, but the satellite relay station is the same or more complicated than a radio base station, and is not economical.
そこで，本発明では無線基地局から送出する制御デー
タを，第４図に示すように,2種類交互に送出することで
対応した。Therefore, in the present invention, as shown in FIG. 4, two types of control data transmitted from the wireless base station are transmitted alternately.
この場合，無線基地局に属する端末局はＡ制御データ
により動作し，サテライト中継局に属する端末局はＢ制
御データによって動作する。ここで，両制御データの内
容を周波数データを除き同じにすることで，無線基地局
に属する端末局とサテライト中継局に属する端末局とは
周波数が異なるだけで同じ動作を行う。また，周波数は
サテライト中継局で変換されるので，無線基地局から見
た端末は全く同じ局に属し動作しているように見え，結
果として，無線基地局の端末局とサテライト中継局の端
末局との間で通信が行なえることになる。In this case, the terminal station belonging to the radio base station operates according to the A control data, and the terminal station belonging to the satellite relay station operates according to the B control data. Here, by making the contents of both control data the same except for the frequency data, the same operation is performed between the terminal station belonging to the radio base station and the terminal station belonging to the satellite relay station except that the frequency is different. In addition, since the frequency is converted by the satellite relay station, the terminal viewed from the radio base station appears to belong to the same station and operates, and as a result, the terminal station of the radio base station and the terminal station of the satellite relay station Communication can be performed with the.
以上のことから，サテライト中継局をサービスエリア
の不感地域に配置することで，サービスエリアの拡大に
大きく寄与する。From the above, by arranging the satellite relay station in the blind area of the service area, it greatly contributes to the expansion of the service area.
（発明の効果） 以上のように本発明は，サテライト中継局の機能とし
て周波数変換という単純な機能を付加するだけで無線基
地局のサービスエリア拡大を図ることができる。(Effects of the Invention) As described above, according to the present invention, the service area of the wireless base station can be expanded simply by adding a simple function of frequency conversion as a function of the satellite relay station.
第１図は本発明によるサテライト中継方式を説明するた
めの図，第２図，第３図はそれぞれ制御チャネルの制御
データの内容を説明するための図，第４図は本発明によ
る制御データを説明するための図。 図中,TX,Tx1,Tx2は送信機,Rx,Rx1,Rx2は受信機。FIG. 1 is a diagram for explaining a satellite relay system according to the present invention, FIGS. 2 and 3 are diagrams for explaining the contents of control data of a control channel, and FIG. 4 is a diagram for explaining control data according to the present invention. FIG. In the figure, T X, T x1, T x2 transmitter, R x, R x1, R x2 receiver.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 北川 三男 東京都港区芝５丁目７番１号 日本電気 株式会社内 (72)発明者 小野寺 健二 東京都港区西新橋３丁目20番４号 日本 電気エンジニアリング株式会社内 (72)発明者 村田 栄一郎 神奈川県横浜市港北区綱島東４丁目３番 １号 松下通信工業株式会社内 (72)発明者 伊藤 宣義 神奈川県横浜市港北区綱島東４丁目３番 １号 松下通信工業株式会社内 (72)発明者 奈良 敏行 神奈川県横浜市港北区綱島東４丁目３番 １号 松下通信工業株式会社内 (72)発明者 横井 雄二 兵庫県尼崎市塚口本町８丁目１番１号 三菱電機株式会社通信機製作所内 (56)参考文献 特開 昭63−99627（ＪＰ，Ａ) 特開 昭62−283723（ＪＰ，Ａ) 特開 昭62−226725（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H04B 7/14 - 7/26 H04Q 7/00 - 7/38 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Mitsuo Kitagawa 5-7-1 Shiba, Minato-ku, Tokyo Inside NEC Corporation (72) Inventor Kenji Onodera 3-20-4 Nishishinbashi, Minato-ku, Tokyo Japan Inside Electric Engineering Co., Ltd. (72) Inventor Eiichiro Murata 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. (72) Nobuyoshi Ito 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama, Kanagawa No. 1 Matsushita Communication Industrial Co., Ltd. (72) Inventor Toshiyuki Nara 4-3-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture 1 Inside Matsushita Communication Industrial Co., Ltd. (72) Inventor Yuji Yokoi 8, Tsukaguchi Honcho 8 No. 1-1, Mitsubishi Electric Corporation Communication Equipment Works (56) References JP-A-63-99627 (JP, A) JP-A-62-283723 (J , A) JP Akira 62-226725 (JP, A) (58 ) investigated the field (Int.Cl. 6, DB name) H04B 7/14 - 7/26 H04Q 7/00 - 7/38
Claims (1)
御チャネルを通して伝送する制御データを周波数変換で
中継する方式であって，無線基地局では該無線基地局で
使用する制御データとサテライト中継局で使用する制御
データとを交互に送出することで無線基地局の端末とサ
テライト中継局の端末間の通信の中継を可能とすること
を特徴とするMCAサテライト中継方式。1. A method in which control data transmitted through a control channel in a satellite relay station of an MCA wireless system is relayed by frequency conversion. In a wireless base station, control data used in the wireless base station and control data used in the satellite relay station are used. An MCA satellite relay system characterized in that relay of communication between a terminal of a radio base station and a terminal of a satellite relay station is enabled by alternately transmitting control data to be transmitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32596090A JP2944196B2 (en) | 1990-11-29 | 1990-11-29 | MCA satellite relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32596090A JP2944196B2 (en) | 1990-11-29 | 1990-11-29 | MCA satellite relay system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04199920A JPH04199920A (en) | 1992-07-21 |
| JP2944196B2 true JP2944196B2 (en) | 1999-08-30 |
Family
ID=18182523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32596090A Expired - Fee Related JP2944196B2 (en) | 1990-11-29 | 1990-11-29 | MCA satellite relay system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2944196B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2636747B2 (en) * | 1994-08-29 | 1997-07-30 | 日本電気株式会社 | Portable repeater |
-
1990
- 1990-11-29 JP JP32596090A patent/JP2944196B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04199920A (en) | 1992-07-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
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| R250 | Receipt of annual fees |
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| LAPS | Cancellation because of no payment of annual fees |