JPH03201832A - Digital mobile communication system - Google Patents
Digital mobile communication systemInfo
- Publication number
- JPH03201832A JPH03201832A JP1343342A JP34334289A JPH03201832A JP H03201832 A JPH03201832 A JP H03201832A JP 1343342 A JP1343342 A JP 1343342A JP 34334289 A JP34334289 A JP 34334289A JP H03201832 A JPH03201832 A JP H03201832A
- Authority
- JP
- Japan
- Prior art keywords
- control channel
- station
- radio base
- control
- base 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.)
- Granted
Links
- 238000010295 mobile communication Methods 0.000 title claims description 14
- 238000004891 communication Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 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、複数の無線基地局と移動局間で、制御局から
の制御チャネル信号を送受信するデジタル移動通信シス
テムに関し、＃に、無線基地局から移動局へ送信される
信号の通信品質を知らせる装置を無線局内に備えたデジ
タル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 digital mobile communication system that transmits and receives control channel signals from a control station between a plurality of radio base stations and a mobile station. The present invention relates to a digital mobile communication system in which a wireless station is equipped with a device for notifying the communication quality of a signal transmitted from a station to a mobile station.
［従来の技術］
従来、この種のデジタル移動通信システムは、第３図に
示すように、−の制御局４０を中心にしてサービス領域
４１．４２ごとに無線基地局５１．５２を配置し、これ
ら無線基地局５１゜５２を中心にして、それぞれのサー
ビス領域内に存在する移動局５３との間で制御チャネル
信号の授受を行なっていた。[Prior Art] Conventionally, in this type of digital mobile communication system, as shown in FIG. These radio base stations 51 and 52 exchange control channel signals with mobile stations 53 located within their respective service areas.
すなわち、制御局４０からの制御チャネル信号は、無線
基地局５１ （５２）を介して移動局５３へ送信され、
移動局５３からの信号は、無線基地局５１（５２）を介
して制御局４０に送信されていた。That is, the control channel signal from the control station 40 is transmitted to the mobile station 53 via the radio base station 51 (52),
A signal from the mobile station 53 was transmitted to the control station 40 via the radio base station 51 (52).
この場合、制御局４０は、各無線基地局と移動局間にお
ける信号の授受が有効におこなわているか、あるいは電
波障害はないか等の通信品質を把握する必要がある。こ
のため、従来は、通信品質を把握するため次のような方
法を採用していた。In this case, the control station 40 needs to know the communication quality, such as whether signals are being exchanged effectively between each radio base station and the mobile station, or whether there is any radio wave interference. For this reason, conventionally, the following method has been adopted to understand communication quality.
移動局から無線基地局への制御チャネル信号（以下、上
り制御チャネル信号と称す、）の通信品質の検出にあっ
ては、無線基地局内に電波障害検出装置を設けることに
より行なっていた。Detection of the communication quality of a control channel signal (hereinafter referred to as an uplink control channel signal) from a mobile station to a radio base station has been performed by providing a radio interference detection device within the radio base station.
また、無線基地局から移動局への制御チャネル信号（以
下、下り制御チャネル信号と称す、）の通信品質の検出
にあっては、移動局内に、受信入力電界および受信チャ
ネル周波数中の特定のチャネルのＳ／Ｎを監視し、デジ
タル信号の試験用誤り率測定を行なう電波障害検出装置
を設け、これら装置から得られたデータを無線基地局を
介して制御局に送信し、送信されたデータを解析して電
波障害の宥無を検出していた。In addition, in detecting the communication quality of control channel signals (hereinafter referred to as downlink control channel signals) from a wireless base station to a mobile station, the mobile station uses a reception input electric field and a specific channel in the reception channel frequency. A radio interference detection device is installed to monitor the S/N of the digital signal and measure the test error rate of the digital signal, and the data obtained from these devices is transmitted to the control station via the wireless base station, and the transmitted data is It was analyzed to detect radio interference.
［発明か解決しようとする課題］
上述した従来の通信品質の把握方法のうち、上り制御チ
ャネル信号の把握方法は、電波障害検出装置を無線基地
局内に設けであるので、容易かつ正確に行なえる。[Problem to be solved by the invention] Among the conventional methods for determining communication quality described above, the method for determining uplink control channel signals is easy and accurate because a radio wave interference detection device is installed in the wireless base station. .
しかし、下り制御チャネル信号の検出は移動局内で行な
っているため、煩雑なデータの授受と解析を必要とし実
用的でなかった。このため、下り制御チャネル信号の電
波障害が生じた場合、制御局でその検出ができないとい
ったことが多く、下り制御チャネルの情報である空チャ
ネルや通話用周波数の情報等を移動局に正確に伝送でき
ず、呼処理の制御等に悪影響を及ぼすことがあった。However, since downlink control channel signals are detected within the mobile station, complicated data exchange and analysis are required, making this method impractical. For this reason, if radio interference occurs in the downlink control channel signal, the control station is often unable to detect it, and the downlink control channel information, such as empty channels and communication frequency information, is accurately transmitted to the mobile station. This could have an adverse effect on call processing control, etc.
本発明は上述した問題点にかんがみてなされたもので、
無線基地局からの下り制御チャネル信号の通信品質を、
隣接する他の無線基地局において把握することにより、
下り制御チャネルにおける電波障害等を容易に検出でき
るようにしたデジタル移動通信システムの提供を目的と
する。The present invention has been made in view of the above-mentioned problems.
The communication quality of downlink control channel signals from wireless base stations is
By understanding other neighboring wireless base stations,
The purpose of the present invention is to provide a digital mobile communication system that can easily detect radio interference in downlink control channels.
ｒＷｌＢの解決手段］
上記目的を達成するために本発明は、制御局を中心に複
数の無線基地局を配置し、制御局からの制御チャネル信
号を無線基地局と移動局間で送受信するデジタル移動通
信システムにおいて、上記複数の無線基地局のうちの任
意の無線基地局に、隣接する他の無線基地局から発信さ
される制御チャネル信号を受信するアンテナと、当該信
号の通信品質を求める制御チャネル専用受信装置と、制
御局および制御チャネル専用受信装置に接続され、＃記
制御チャネル専用受信装置で検出された信号の通信品質
情報を制御局に送信する無線基地局制御装置を備えた構
成としてあり、このうち制御チャネル専用受信装置は、
受信した信号を復調する受信機と、復調された信号を復
号して信号品質を求めるヴィタビ復号器とで構成してあ
り、好ましくは複数の無線基地局のすべての無線基地局
内部に、制御チャネル専用受信装置を設けた構成としで
ある。Solution to rWlB] To achieve the above object, the present invention provides a digital mobile system in which a plurality of wireless base stations are arranged around a control station, and control channel signals from the control station are transmitted and received between the wireless base station and mobile stations. In a communication system, any radio base station among the plurality of radio base stations is equipped with an antenna for receiving a control channel signal transmitted from another adjacent radio base station, and a dedicated control channel for determining the communication quality of the signal. The configuration includes a receiving device, a radio base station control device connected to a control station and a control channel dedicated receiving device, and transmitting communication quality information of a signal detected by the control channel dedicated receiving device to the control station, Among these, the control channel dedicated receiver is
It consists of a receiver that demodulates the received signal and a Viterbi decoder that decodes the demodulated signal to determine the signal quality. This configuration includes a dedicated receiving device.
［作用］
上記構成からなるデジタル移動通信システムによれば、
無線基地局と移動局間の上下制御チャネル信号の授受を
制御局によって監視することにより、電波障害等を回避
した確実な信号授受が可能となる。[Operation] According to the digital mobile communication system having the above configuration,
By monitoring the transmission and reception of uplink and downlink control channel signals between a radio base station and a mobile station by a control station, reliable signal transmission and reception is possible while avoiding radio interference and the like.
［実施例］
以下１本発明の一実施例について図面を参照して説明す
る。[Example] An example of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例を示すデジタル移動通信シス
テムの概略図である。FIG. 1 is a schematic diagram of a digital mobile communication system showing one embodiment of the present invention.
図面において、ｌは制御局てあり、発呼・着呼等の呼処
理制御時に交換局（図示せず）とのインタフェースを行
なうとともに、後述する無線基地局における制御チャネ
ルの電波障害を検出する。In the drawing, reference numeral 1 denotes a control station, which interfaces with a switching center (not shown) during call processing control such as outgoing and incoming calls, and detects radio wave disturbances in control channels in radio base stations, which will be described later.
２．３は無線基地局であり、制御線１００によって制御
局ｌと接続されている。このうち無線基地局２の内部に
は、移動局４との信号授受を行なうアンテナ２１と、ア
ンテナ２１に接続され信号の送受信を行なう送受信装Ｍ
２２を設けである。また、無線基地局２の内部には、無
線基地局３からの下り制御チャネル信号を受信するアン
テナ３１と当該信号の通信品質を求める制御チャネル専
用受信装置が設けてあり、前記送受信装置２２とともに
それぞれ無線基地局制御装置２０に接続されている。2.3 is a wireless base station, which is connected to the control station l via a control line 100. Inside the radio base station 2, there is an antenna 21 for transmitting and receiving signals with the mobile station 4, and a transmitting and receiving device M connected to the antenna 21 for transmitting and receiving signals.
22 is provided. Further, inside the radio base station 2, an antenna 31 for receiving a downlink control channel signal from the radio base station 3 and a control channel dedicated receiving device for determining the communication quality of the signal are provided. It is connected to the radio base station control device 20.
ここで、第２図にもとづいて制御チャネル専用受信装置
について説明する。第２図において、３２０は受信機て
、アンテナ３１に接続されており、受信された下り制御
チャネル信号を復調し。Here, the control channel dedicated receiver will be explained based on FIG. In FIG. 2, a receiver 320 is connected to the antenna 31 and demodulates the received downlink control channel signal.
受信電界検出信号及び復調信号を出力する。Outputs received electric field detection signal and demodulated signal.
３２１はヴィタビ復号器であり、受信ａ３２０から出力
された復調信号を復号し、さらに信号品質と相関関係に
あるパスメトリック差をもとに、信号品質を求める。３
２２は信号処理器であり、ヴィタビ復号器３２１で求め
られた受信電界検出信号を入力し、下り制御チャネルの
通信品質情報として無線基地局制御装置２０へ出力する
。無線基地局制御装置２０は入力された情報を制御線１
００を介して制御局ｌへ送信する。321 is a Viterbi decoder that decodes the demodulated signal output from the receiver a 320 and further determines the signal quality based on the path metric difference that is correlated with the signal quality. 3
22 is a signal processor which inputs the received electric field detection signal determined by the Viterbi decoder 321 and outputs it to the radio base station controller 20 as communication quality information of the downlink control channel. The radio base station control device 20 transmits the input information to the control line 1.
00 to the control station l.
したがって、このような構成からなるデジタル移動通信
システムによれば、まず、制御局１から、制御線１００
を介して無線基地局２．３へ信号が送出される０次いで
、無線基地局２では、入力された信号をアンテナ２１を
介して送受＠装置２２から移動局４へ下り制御チャネル
信号として送信する。Therefore, according to the digital mobile communication system having such a configuration, first, the control line 100 is transmitted from the control station 1.
The signal is sent to the radio base station 2.3 via the radio base station 2. Next, the radio base station 2 transmits the input signal via the antenna 21 from the transmitting/receiving device 22 to the mobile station 4 as a downlink control channel signal. .
一方、アンテナ３１からは、無線基地局３からの制御チ
ャネル信号が受信され、制御チャネル専用受信装置３２
内の受信機３２０に入力される。On the other hand, a control channel signal from the wireless base station 3 is received from the antenna 31, and a control channel dedicated receiving device 32 receives the control channel signal from the wireless base station 3.
The signal is input to the receiver 320 in the camera.
受信機３２０では、入力した信号を復調し、さらにヴィ
タビ復号器３２１によって復号され信号品質を求める。The receiver 320 demodulates the input signal, and the signal is further decoded by a Viterbi decoder 321 to determine signal quality.
そして、求められた信号品質のデータは無線基地局制御
装置２０へ入力され、さらに制御ｌ線１００を介して制
御局ｌへ送信される。制御局ｌでは、送信されたデータ
をもとに、下り制御チャネル信号の電波障害の有無を検
出する。Then, the determined signal quality data is input to the radio base station control device 20 and further transmitted to the control station l via the control line 100. The control station l detects the presence or absence of radio wave interference in the downlink control channel signal based on the transmitted data.
そして、電波障害を検出した場合には、制御チャネルの
キャリアを変更することによって、電波障害を回避する
。If radio wave interference is detected, the radio wave interference is avoided by changing the carrier of the control channel.
なお、本実施例では、無線基地局３からの制御チャネル
信号を無線基地局２が受信する構成としであるが、無線
基地局３を無線基地局２と同じ構成とすることによって
、無線基地局３からの信号を無線基地局２が受信する構
成とすることもできる。Note that in this embodiment, the configuration is such that the wireless base station 2 receives the control channel signal from the wireless base station 3, but by making the wireless base station 3 have the same configuration as the wireless base station 2, the wireless base station It is also possible to adopt a configuration in which the wireless base station 2 receives the signal from the wireless base station 3.
また１本実施例ては、信号品質を求める手段としてヴィ
タビ復号器を用いているか、これと同一または相当する
動作を行なう公知の各種手段を適用してもよい。Further, in this embodiment, a Viterbi decoder is used as a means for determining signal quality, or various known means that perform the same or equivalent operations may be applied.
［発明の効果コ
以上説明したように、本発明のデジタル移動通信システ
ムによれば、従来、制御局か知りえなかった下り制御チ
ャネル信号の通信品質及び電波障害の有無の検出が可能
となり、常に確実な通信システムの提供が可能となると
いった効果がある。[Effects of the Invention] As explained above, according to the digital mobile communication system of the present invention, it is possible to detect the communication quality of downlink control channel signals and the presence or absence of radio wave interference, which was previously unknown to the control station. This has the effect of making it possible to provide a reliable communication system.
第１図は本発明の一実施例を示すデジタル移動通信シス
テムの概略図、第２図は本発明の要部である制御チャネ
ル電波障害検出装置のブロック図、第３図は従来のデジ
タル通信システムの概略図である。
ｌ：制御局 ２．３：無線基地局４：移動局
２０ｆｉ線基地局制御装置２１．３１：アンテ
ナ
２２：送受信装置
３２：制御チャネル専用受信装置
３２０：受信機 ３２１：ヴィタビ復号機３２２：
信号処理器Fig. 1 is a schematic diagram of a digital mobile communication system showing an embodiment of the present invention, Fig. 2 is a block diagram of a control channel radio interference detection device which is the main part of the present invention, and Fig. 3 is a conventional digital communication system. FIG. l: Control station 2.3: Radio base station 4: Mobile station
20fi line base station controller 21.31: Antenna 22: Transmitter/receiver 32: Control channel dedicated receiver 320: Receiver 321: Viterbi decoder 322:
signal processor
Claims (3)
局からの制御チャネル信号を無線基地局と移動局間で送
受信すデジタル移動通信システムにおいて、 上記複数の無線基地局のうちの任意の無線基地局に、隣
接する他の無線基地局から発信される制御チャネル信号
を受信するアンテナと、 当該信号の通信品質を求める制御チャネル専用受信装置
と、 制御局および制御チャネル専用受信装置に接続され、前
記制御チャネル専用受信装置で検出された信号の通信品
質情報を制御局に送信する無線基地局制御装置と を備えたことを特徴とするデジタル移動通信システム。(1) In a digital mobile communication system in which a plurality of radio base stations are arranged around a control station and control channel signals from the control station are transmitted and received between the radio base station and mobile stations, one of the plurality of radio base stations mentioned above An antenna for receiving control channel signals transmitted from other adjacent radio base stations in any radio base station, a control channel dedicated receiver for determining the communication quality of the signal, and a control station and control channel dedicated receiver. 1. A digital mobile communication system comprising: a radio base station control device connected to the radio base station control device for transmitting communication quality information of a signal detected by the control channel dedicated receiving device to a control station.
号して信号品質を求めるヴィタビ復号器とで構成したこ
とを特徴とする請求項１記載のデジタル移動通信システ
ム。(2) The control channel dedicated receiving device is configured of a receiver that demodulates the received signal and a Viterbi decoder that decodes the demodulated signal to determine signal quality. Digital mobile communication system.
制御チャネル専用受信装置を設けたことを特徴とする請
求項１または２記載のデジタル移動通信システム。(3) Inside all wireless base stations of multiple wireless base stations,
3. The digital mobile communication system according to claim 1, further comprising a control channel dedicated receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343342A JPH0834631B2 (en) | 1989-12-28 | 1989-12-28 | Digital mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343342A JPH0834631B2 (en) | 1989-12-28 | 1989-12-28 | Digital mobile communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03201832A true JPH03201832A (en) | 1991-09-03 |
| JPH0834631B2 JPH0834631B2 (en) | 1996-03-29 |
Family
ID=18360784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1343342A Expired - Lifetime JPH0834631B2 (en) | 1989-12-28 | 1989-12-28 | Digital mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0834631B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8107897B2 (en) | 2005-10-31 | 2012-01-31 | Sharp Kabushiki Kaisha | Wireless transmitter |
| US8320849B2 (en) | 2005-12-20 | 2012-11-27 | Sharp Kabushiki Kaisha | Transmitter for communications system |
| JP5831458B2 (en) * | 2010-11-18 | 2015-12-09 | 富士通株式会社 | Base station apparatus, communication system and communication method |
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|---|---|---|---|---|
| JPS5717246A (en) * | 1980-07-07 | 1982-01-28 | Nec Corp | Control system for mobile radio communication |
| JPS5868333A (en) * | 1981-10-17 | 1983-04-23 | Nippon Telegr & Teleph Corp <Ntt> | Mobile communication system |
-
1989
- 1989-12-28 JP JP1343342A patent/JPH0834631B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5717246A (en) * | 1980-07-07 | 1982-01-28 | Nec Corp | Control system for mobile radio communication |
| JPS5868333A (en) * | 1981-10-17 | 1983-04-23 | Nippon Telegr & Teleph Corp <Ntt> | Mobile communication system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8107897B2 (en) | 2005-10-31 | 2012-01-31 | Sharp Kabushiki Kaisha | Wireless transmitter |
| US8111743B2 (en) | 2005-10-31 | 2012-02-07 | Sharp Kabushiki Kaisha | Wireless transmitter |
| US8116708B2 (en) | 2005-10-31 | 2012-02-14 | Sharp Kabushiki Kaisha | Wireless receiver |
| US8121184B2 (en) | 2005-10-31 | 2012-02-21 | Sharp Kabushiki Kaisha | Wireless receiver |
| US8121559B2 (en) | 2005-10-31 | 2012-02-21 | Sharp Kabushiki Kaisha | Wireless transmitter |
| US8170512B2 (en) | 2005-10-31 | 2012-05-01 | Sharp Kabushiki Kaisha | Wireless transmitter |
| EA016947B1 (en) * | 2005-10-31 | 2012-08-30 | Шарп Кабусики Кайся | Wireless receiving unit |
| US8320849B2 (en) | 2005-12-20 | 2012-11-27 | Sharp Kabushiki Kaisha | Transmitter for communications system |
| JP5831458B2 (en) * | 2010-11-18 | 2015-12-09 | 富士通株式会社 | Base station apparatus, communication system and communication method |
| US9232504B2 (en) | 2010-11-18 | 2016-01-05 | Fujitsu Limited | Base station apparatus, communication system, and communication method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0834631B2 (en) | 1996-03-29 |
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