JPH0425230A - Mobile communication system - Google Patents
Mobile communication systemInfo
- Publication number
- JPH0425230A JPH0425230A JP2129812A JP12981290A JPH0425230A JP H0425230 A JPH0425230 A JP H0425230A JP 2129812 A JP2129812 A JP 2129812A JP 12981290 A JP12981290 A JP 12981290A JP H0425230 A JPH0425230 A JP H0425230A
- Authority
- JP
- Japan
- Prior art keywords
- control channel
- channel
- control
- base station
- radio
- 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.)
- Granted
Links
- 238000010295 mobile communication Methods 0.000 title claims description 7
- 238000004891 communication Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000005684 electric field Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は専用チャネル制御方式でありマルチチャネルア
クセス方式による移動通信システムに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile communication system using a dedicated channel control method and a multi-channel access method.
従来、この種の移動通信システムは、制御チャネルの割
当てをシステム開発時点に固定し、基地局と端末局との
間で複数の通信チャネルを共用して行う通信を制御チャ
ネルによって制御していた。Conventionally, in this type of mobile communication system, the allocation of control channels is fixed at the time of system development, and communication performed by sharing a plurality of communication channels between a base station and a terminal station is controlled by the control channel.
上述した従来の移動通信システムは、制御チャネルを予
め固定的に割当てているために、初期の需要予測が外れ
ると制御チャネルの不足や過剰が生じたり、周波数妨害
によりその制御チャネルが使えなくなった時に代行の制
御チャネルを自由に設定できない欠点がある。In the conventional mobile communication system described above, control channels are allocated in a fixed manner in advance, so if the initial demand forecast is incorrect, there may be a shortage or surplus of control channels, or if the control channel becomes unusable due to frequency interference. There is a drawback that a substitute control channel cannot be freely set.
本発明の移動通信システムは、送受信周波数がそれぞれ
あらかじめ定められている複数の無線チャネルを通信チ
ャネル及び制御チャネルに用いる移動通信システムにお
いて、前記無線チャネルを変えることなく前記通話チャ
ネル及び前記制御チャネルのいずれにも設定でき前記制
御チャネルとして設定されたとき前記制御チャネルであ
ることを示す信号を周期的に送出する複数の第１の送受
信機を備えた基地局と、前記無線チャネルのいずれにも
同調可能な第２の送受信機、前回開局中の前記制御チャ
ネルの前記無線チャネルごとの捕捉回数の分布を示すデ
ータを記憶する書替え可能な不揮発性メモリ、及び、こ
の不揮発性メモリの記憶内容と前記第２の送受信機の受
信入力電界と前記第２の送受信機の受信信号中の前記制
御チャネルであることを示す前記信号とから前記第２の
送受信機を制御して前記制御チャネルを走査捕捉し今回
開局後の前記制御チャネルの前記無線チャネルごとの捕
捉回数を計数し計数結果により前記不揮発性メモリの記
憶内容を閉局時に更新する制御部を備えた端末局とを具
備している。The mobile communication system of the present invention uses a plurality of radio channels, each having a predetermined transmission and reception frequency, as a communication channel and a control channel. A base station equipped with a plurality of first transceivers that periodically transmits a signal indicating that the control channel is the control channel when set as the control channel, and can be tuned to any of the radio channels. a second transmitter/receiver, a rewritable non-volatile memory that stores data indicating the distribution of the number of captures of the control channel for each radio channel that was previously open; The second transceiver is controlled to scan and capture the control channel based on the received input electric field of the transceiver and the signal indicating that it is the control channel in the received signal of the second transceiver, and the current communication is started. and a terminal station comprising a control unit that counts the number of captures of the control channel for each radio channel and updates the storage contents of the nonvolatile memory based on the counting result when the station is closed.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
基地局１〜３は小ゾーン方式でサービスエリアを構成す
る分散基地局であり、それぞれゾーンａ〜Ｃを電波的に
カバーしている。端末局４〜６は本実施例のサービスエ
リア内、すなわち、ゾーンミルＣ内を自由に移動する多
くの端末局の内のいくつかである。ゾーンａでは基地局
１に使用するチャネルとしてＣＨＩ、１１，２１，３１
，４１゜５１．６１．７１．８１の計９ＣＨが割り当て
られており、この内の１つのチャネルが制御チャネルと
して動作し、他のチャネルか通信チャネルとして動作す
るようになっている。同様に、ゾーンｂではＣＨ２，’
１２．・・・８２を使用し、ゾーンＣではＣＨ３，１３
，・・・８３を使用する。これらの制御チャネルと通信
チャネルの使い分けは運用センタ７より制御する。なお
、各チャネルのＣＨ番号をＮとすると、基地局送信周波
数ｆ＝ｆｏ＋０．０１２５Ｎ ［ＭＨｚ ］である。Base stations 1 to 3 are distributed base stations that configure a service area using a small zone method, and each radio wave covers zones a to C. Terminal stations 4 to 6 are some of the many terminal stations that freely move within the service area of this embodiment, that is, within zone mill C. In zone a, the channels used for base station 1 are CHI, 11, 21, 31.
, 41°, 51.61.71.81, in total, one channel among these operates as a control channel, and the other channels operate as communication channels. Similarly, in zone b, CH2,'
12. ...82 is used, and in zone C CH3,13
,...83 are used. The use of these control channels and communication channels is controlled by the operation center 7. Note that when the CH number of each channel is N, the base station transmission frequency f=fo+0.0125N [MHz].
端末局の発呼動作例を説明すると、今、端末局４が電源
投入されると、後述する制御チャネル捕捉方法で基地局
１の送信する制御チャネルを捕捉する。捕捉した制御チ
ャネルにより所定の発呼処理を行い、通信チャネルの１
つを用いて基地局１と接続し、交換局８を介して要求し
た加入者電話９と接続し必要な通信を行う。To explain an example of the calling operation of the terminal station, when the terminal station 4 is powered on, it acquires the control channel transmitted by the base station 1 using a control channel acquisition method to be described later. A predetermined calling process is performed using the captured control channel, and one of the communication channels is
It connects to the base station 1 using one terminal, and connects to the requested subscriber telephone 9 via the switching center 8 to perform necessary communications.
第２図は基地局１のブロック図である。FIG. 2 is a block diagram of the base station 1.
運用センタ７からの各チャネルの動作モード指示は無線
制御部１７を介して各送信機１５及び各受信機１６に対
して行われる。これにより１つのチャネルが制御チャネ
ルとして動作し、他のチャネルが通信チャネルとして動
作する。各送信機１５の出力は送信共用器１３にて合成
され送信アンテナ１１より送信される。一方、受信アン
テナ１２より受信された信号は受信分配器１４により各
受信機１６に分配される。基地局２，３も送信機及び受
信機のチャネル番号が異ることを除いては基地局１と同
じ構成である。Operation mode instructions for each channel are issued from the operation center 7 to each transmitter 15 and each receiver 16 via the radio control unit 17. This causes one channel to operate as a control channel and the other channel to operate as a communication channel. The outputs of each transmitter 15 are combined by a transmission duplexer 13 and transmitted from a transmission antenna 11. On the other hand, the signal received by the receiving antenna 12 is distributed to each receiver 16 by the receiving distributor 14. Base stations 2 and 3 also have the same configuration as base station 1, except that the channel numbers of the transmitter and receiver are different.
第３図は端末局４のブロック図である。他の端末局も構
成はすべて同じである。FIG. 3 is a block diagram of the terminal station 4. All other terminal stations have the same configuration.
アンテナ４１より受信された信号はアンテナ共用器４２
を介して受信部４４に入り、ここで復調され、制御部４
６及び通話制御部４７を経てスピーカ４９に供給される
。又、送信Ｉ！４３は制御部４６より発する制御信号及
びマイクロホン４８゜通話制御部４７からの変調信号を
アンテナ共用器４２を経てアンテナ４１より送信する。The signal received from the antenna 41 is sent to the antenna duplexer 42
It enters the receiving section 44 via the receiver, is demodulated here, and is sent to the control section 4.
6 and a call control unit 47 to the speaker 49 . Also, send I! 43 transmits a control signal emitted from the control section 46 and a modulated signal from the microphone 48 degree call control section 47 from the antenna 41 via the antenna duplexer 42 .
ス、制御部４６は受信部４４からの入力電界情報と復調
信号から制御信号の検出を行い、内部に持つ統計処理部
４６１で後述のような統計処理を実行し、後記する制御
チャネル捕捉動作を行う。The control unit 46 detects a control signal from the input electric field information and demodulated signal from the reception unit 44, executes statistical processing as described later in an internal statistical processing unit 461, and performs a control channel capture operation to be described later. conduct.
第４図に基地局１〜３の送信する制御チャネルのフォー
マットを示す。FIG. 4 shows the format of control channels transmitted by base stations 1 to 3.
本実施例では制御チャネルは連続送信されており、フレ
ーム同期信号（ＦＳ）Ｆが一定間隔でくり返されており
、これにより各端末局は後述する制御チャネル捕捉にお
いて制御チャネルか通信チャネルか見分けることが可能
となる。データ部りは回線制御用の各種データが配置さ
れている。In this embodiment, the control channel is continuously transmitted, and the frame synchronization signal (FS) F is repeated at regular intervals, so that each terminal station can distinguish between the control channel and the communication channel when acquiring the control channel described later. becomes possible. The data section contains various data for line control.
次に、各端末局の制御チャネル捕捉動作を第５図、第６
図を用いて説明する。Next, the control channel acquisition operation of each terminal station is shown in Figures 5 and 6.
This will be explained using figures.
端末局は電源が投入されると、不揮発性メモリ４６２に
記憶されている第５図に示すようなイメージのチャネル
別の制御チャネル捕捉回数（又は確率）分布より回数（
又は確率〉が高い方から複数の制御チャネル候補の第１
群を選ぶ（第６図。When the terminal station is powered on, it calculates the number of times (or probability) of control channel capture for each channel in the image shown in FIG. 5 stored in the non-volatile memory 462.
The first of the multiple control channel candidates from the one with the highest probability
Select a group (Figure 6).
Ｓｌ）。次に、第１群の各チャネルの入力電圧測定と信
号内容により制御チャネルかどうかの確認を行ない、制
御チャネルで且つ入力電圧が通常サービスエリア内で規
定している規定値以上で最も高いチャネルを使用する制
御チャネルとして捕捉し、圏内モードを設定して通常の
運用動作に入る（Ｓ２．Ｓ３）。閉局操作が行われると
くＳ４）、開局中に種々の手順により捕捉した制御チャ
ネルの捕捉回数を計数し、過去の累積データと合わせて
統計処理をし、不揮発性メモリ４６２の制御チャネル捕
捉回数（又は確率）分布を更新しくＳ５）、電源断とす
る。SL). Next, we check whether it is a control channel by measuring the input voltage of each channel in the first group and the signal content, and select the channel that is a control channel and has the highest input voltage above the specified value within the normal service area. It captures the control channel to be used, sets the within-range mode, and enters normal operation (S2 and S3). When the station closing operation is performed (S4), the number of times the control channel was captured by various procedures during the opening is counted, statistical processing is performed together with past accumulated data, and the number of control channel captures (or Update the probability distribution (S5) and turn off the power.
ステップＳ２で規定値以上の電界の制御チャネルがなく
、制御チャネルが捕捉できなかった場合は、制御チャネ
ル捕捉回数（又は確率）分布から捕捉履歴のあるチャネ
ルを全て第２群としくＳ６）、その中から前記と同様に
して制御チャネルを捕捉する（Ｓ７，５３７）。In step S2, if there is no control channel with an electric field higher than the specified value and the control channel cannot be captured, all channels with a capture history are set as the second group based on the control channel capture frequency (or probability) distribution (S6). A control channel is acquired from among them in the same manner as described above (S7, 537).
さらにそれでも捕捉できなかった場合は、前記の第１群
及び第２群の中から受信可能な制御チャネルを捕捉する
（Ｓ８，５３１）。Furthermore, if acquisition is still not possible, a receivable control channel is acquired from the first group and the second group (S8, 531).
さらに捕捉できなかった場合は、残ったチャネルの中か
ら制御チャネルで且つ前記同様の規定値以上の制御チャ
ネルを捕捉する（Ｓ９．Ｓ３）。If further capture is not possible, a control channel from among the remaining channels that is equal to or greater than the same prescribed value as described above is captured (S9, S3).
さらに、捕捉できなかった場合は、上記の残ったチャネ
ルの中から受信可能な制御チャネルを捕捉する（ＳＩＯ
，Ｓ３）。Furthermore, if acquisition is not possible, a receivable control channel is acquired from the remaining channels (SIO
, S3).
それでも捕捉できなかった場合は、圏外モードを設定し
て（Ｓｌｌ）再度制御チャネルの捕捉動作をくり返す。If acquisition is still not possible, set the out-of-range mode (Sll) and repeat the control channel acquisition operation again.
以上説明したように本発明は、基地局においては制御チ
ャネルの割当てを任意に設定できるようにし、端末局に
おいては制御チャネルの走査に学習機能を持たせること
により、システムのチャネル計画において予め制御チャ
ネルを固定的に定めておく必要がなく柔軟性のあるチャ
ネル計画を立てられる効果がある。As explained above, the present invention enables base stations to arbitrarily set control channel allocation, and terminal stations to have a learning function for control channel scanning, so that control channel allocation can be set in advance in system channel planning. This has the effect of making it possible to create flexible channel plans without having to set them in a fixed manner.
第１図は本発明の一実施例を示すブロック図、第２図は
第１図における基地局１のブロック図、第３図は同しく
端末局４のブロック図、第４図は第１の実施例における
基地局の送信する制御チャネルのフォーマットを示す図
、第５図は第４図における不揮発性メモリ４６２の記憶
内容を説明するための図、第６図は第１図の実施例にお
ける端末局の制御チャネル捕・捉のフローチャートであ
る。
１〜３・・・基地局、４〜６・・・端末局、７・・・運
用センタ、８・・・交換局、９・・・加入者電話、１５
・・・送信機、１６・・・受信機５．１７・・・無線制
御部、４３・・・送信部、４４・・・受信部、４５・・
・シンセサイザ、４６・・・制御部、４６１・・・統計
処理部、４６２・・・不揮発性メモリ。FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram of the base station 1 in FIG. 1, FIG. 3 is a block diagram of the terminal station 4, and FIG. 4 is a block diagram of the base station 1 in FIG. A diagram showing the format of the control channel transmitted by the base station in the embodiment, FIG. 5 is a diagram for explaining the storage contents of the nonvolatile memory 462 in FIG. 4, and FIG. 6 is a diagram showing the format of the control channel transmitted by the base station in the embodiment of FIG. 2 is a flowchart of control channel acquisition and acquisition of a station. 1-3...Base station, 4-6...Terminal station, 7...Operation center, 8...Switching center, 9...Subscriber telephone, 15
...Transmitter, 16...Receiver 5.17...Radio control section, 43...Transmission section, 44...Reception section, 45...
-Synthesizer, 46...Control unit, 461...Statistical processing unit, 462...Nonvolatile memory.
Claims (1)
の無線チャネルを通信チャネル及び制御チャネルに用い
る移動通信システムにおいて、前記無線チャネルを変え
ることなく前記通話チャネル及び前記制御チャネルのい
ずれにも設定でき前記制御チャネルとして設定されたと
き前記制御チャネルであることを示す信号を周期的に送
出する複数の第１の送受信機を備えた基地局と、前記無
線チャネルのいずれにも同調可能な第２の送受信機、前
回開局中の前記制御チャネルの前記無線チャネルごとの
捕捉回数の分布を示すデータを記憶する書替え可能な不
揮発性メモリ、及び、この不揮発性メモリの記憶内容と
前記第２の送受信機の受信入力電界と前記第２の送受信
機の受信信号中の前記制御チャネルであることを示す前
記信号とから前記第２の送受信機を制御して前記制御チ
ャネルを走査捕捉し今回開局後の前記制御チャネルの前
記無線チャネルごとの捕捉回数を計数し計数結果により
前記不揮発性メモリの記憶内容を閉局時に更新する制御
部を備えた端末局とを具備することを特徴とする移動通
信システム。In a mobile communication system that uses a plurality of radio channels, each having a predetermined transmission and reception frequency, as a communication channel and a control channel, the radio channel can be set as either the speech channel or the control channel without changing the radio channel. a base station comprising a plurality of first transceivers that periodically transmit a signal indicating that the control channel is the control channel when set; a second transceiver that can be tuned to any of the radio channels; a rewritable non-volatile memory that stores data indicating a distribution of the number of captures for each radio channel of the control channel in operation, and a storage content of this non-volatile memory and a receiving input electric field of the second transceiver; The second transceiver is controlled to scan and capture the control channel based on the signal indicating that it is the control channel in the received signal of the second transceiver, and the radio of the control channel after the current opening is detected. 1. A mobile communication system comprising: a terminal station comprising a control unit that counts the number of captures for each channel and updates the storage contents of the nonvolatile memory when the station is closed based on the count result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2129812A JP2830374B2 (en) | 1990-05-18 | 1990-05-18 | Mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2129812A JP2830374B2 (en) | 1990-05-18 | 1990-05-18 | Mobile communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0425230A true JPH0425230A (en) | 1992-01-29 |
| JP2830374B2 JP2830374B2 (en) | 1998-12-02 |
Family
ID=15018834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2129812A Expired - Fee Related JP2830374B2 (en) | 1990-05-18 | 1990-05-18 | Mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2830374B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068280A (en) * | 2007-09-14 | 2009-04-02 | Caterpillar Japan Ltd | Working lever mount jump-up device for working machine |
-
1990
- 1990-05-18 JP JP2129812A patent/JP2830374B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009068280A (en) * | 2007-09-14 | 2009-04-02 | Caterpillar Japan Ltd | Working lever mount jump-up device for working machine |
| JP4609900B2 (en) * | 2007-09-14 | 2011-01-12 | キャタピラー エス エー アール エル | Work lever mounting body flip-up device for work machines |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2830374B2 (en) | 1998-12-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |