JPH02303236A - Automobile telephone system - Google Patents
Automobile telephone systemInfo
- Publication number
- JPH02303236A JPH02303236A JP1125028A JP12502889A JPH02303236A JP H02303236 A JPH02303236 A JP H02303236A JP 1125028 A JP1125028 A JP 1125028A JP 12502889 A JP12502889 A JP 12502889A JP H02303236 A JPH02303236 A JP H02303236A
- Authority
- JP
- Japan
- Prior art keywords
- mobile station
- reception level
- base stations
- radio zone
- wireless zone
- 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
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process 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〕 本発明は自動車電話方式に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a car telephone system.
従来の自動車電話方式においては、通話中の移動局にお
けるチャンネル切替えは、通話中の無線ゾーンにおける
基地局において、当該移動局装置からの受信レベルの低
下を検出するとともに、近隣！！線ゾーンの全基地局に
おいても、通話用の受信機を一時的に前記移動局装置に
対応する電解レベル測定用の受信機として使用し、当該
移動局からの受信レベルを測定してレベル判定を行ない
、その内の受信レベルの最も高い無線ゾーンを遭択して
、当該移動局に対する電話回線を接続するように構成さ
れているのが一最である。In the conventional car telephone system, channel switching at a mobile station during a call is performed by detecting a drop in the reception level from the mobile station at the base station in the wireless zone where the call is being made, and at the same time detecting a drop in the reception level from the mobile station in question. ! At all base stations in the line zone, the receiver for telephone calls is temporarily used as a receiver for measuring the electrolytic level corresponding to the mobile station device, and the reception level from the mobile station is measured to determine the level. The best option is to connect the telephone line to the mobile station by selecting the radio zone with the highest reception level among the mobile stations.
上述した従来の自動車電話方式においては、通話中の移
動局の位置が不明であるために、上述のように、近隣無
線ゾーンの全基地局において前記移動局からの受信レベ
ルを測定し、受信レベル判定を行なうことが必要となる
２このため、前記受信レベルの判定から無線ゾーンの選
択に至るまでの一連のＩＩＩ御処理に、多大のプログラ
ムを要するという欠点があるとともに、近隣無線ゾーン
の基地局における通話用受信機を、上述のように、受信
レベル測定用として使用することになるため、チャンネ
ル切替えの対象外の池の無線ゾーンに所在する移動局に
対し、一時的にせよ、通話不能の状態を発生するという
欠点がある。In the conventional car telephone system described above, since the location of the mobile station during a call is unknown, the reception level from the mobile station is measured at all base stations in the nearby wireless zone as described above, and the reception level is Therefore, there is a drawback that a large amount of program is required for the series of III control processing from the reception level determination to the selection of the wireless zone, and the base station in the neighboring wireless zone As mentioned above, the receiver for telephone calls will be used for measuring the reception level, so it may be possible to make calls to mobile stations located in the wireless zone outside the target of channel switching, even temporarily. It has the disadvantage of generating a condition.
本発明の自動車電話方式は、移動局を形成する自動車に
対応して、所定の無線ゾーン基地局を配置して構成され
る自動車電話方式において、前記移動局に設けられる移
動局装置に、当該移動局の通話中のチャンネル切替え時
に、所定の複数の無線ゾーン基地局からの受信レベルを
測定し、前記各無線ゾーン基地局からの受信レベルを比
較する手段と、前記手段により得られる受信レベルの測
定比較結果を前記複数の無線ゾーン基地局に送出する手
段と、を備えて構成される。The mobile phone system of the present invention is configured by arranging a predetermined wireless zone base station corresponding to a car forming a mobile station. Means for measuring the reception level from a plurality of predetermined wireless zone base stations and comparing the reception level from each of the wireless zone base stations when switching channels during a call at the station, and measuring the reception level obtained by the means. and means for transmitting comparison results to the plurality of wireless zone base stations.
次に、本発明について図面を参照して説明する。第１図
は、本発明の一実施例に含まれる移動局装置のブロック
図、第２図は、自動車電話方式における無線ゾーンの構
成図である。第１図に示されるように、本実施例におけ
る移動局装置は、アンテナ１と、デュプレクサ３、送信
機４、受信機［ＡＪ５．受信機［Ｂ１６および論理回路
７を含む無線機部２と、電話機部８とを備えて構成され
ている。Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of a mobile station device included in an embodiment of the present invention, and FIG. 2 is a configuration diagram of a wireless zone in a car telephone system. As shown in FIG. 1, the mobile station device in this embodiment includes an antenna 1, a duplexer 3, a transmitter 4, a receiver [AJ5. The receiver [B16] includes a radio section 2 including a logic circuit 7, and a telephone section 8.
また、第２図においては、無線ゾーン１００，１０１゜
１０２．１０３，１０４，１０５および１０６に対応し
て、無線ゾーン１００におけるＰ点に位置する自動車（
移動局）が、無線ゾーン１００から無線ゾーン１０１に
移動する状態が示されている。以下においては、第２図
に示される状態を想定し１通話中の移動局における運用
操作を含めて、本実施例の運用動作について説明する。In addition, in FIG. 2, a car located at point P in the wireless zone 100 (
A state in which a mobile station (mobile station) moves from a wireless zone 100 to a wireless zone 101 is shown. The operation of this embodiment will be described below, assuming the state shown in FIG. 2, including the operation of the mobile station during one call.
第１図に示される移動局装置は、受信機能としては、選
択周波数ダイパーシティ方式を採用しており、無線機部
２には、受信ＦＲ［ＡＪ ５および受信ｆｉ［ＢＩ ６
が並列に接続されている。初めに、第２図のＰ点に位置
していた自動車に設けられている移動局装置においては
、自己の所在する無線ゾーン１００の基地局を介して、
受信機［ＡＪ５．受信機ｒＢＩ６、送信機４および電話
機部８等により所要の通話が行なわれている。The mobile station device shown in FIG. 1 employs a selective frequency diversity method as a reception function, and the radio section 2 includes reception FR [AJ 5 and reception fi [BI 6].
are connected in parallel. First, the mobile station device installed in the car located at point P in FIG.
Receiver [AJ5. Required calls are being made using the receiver rBI6, the transmitter 4, the telephone section 8, and the like.
前記移動局の無線ゾーンｌＯＯの周辺領域に対する移動
に伴い、！！！線ゾーンｌＯＯの基地局における移動局
の送信ｌｉ！４からの受信電力が漸次低下してくるため
、通話中の移動局としては１通話チャンネルの切替えが
必要になってくる。前記基地局においては、この受信電
力の低下を検出した上−で。As the mobile station moves to the surrounding area of the wireless zone lOO,! ! ! Transmission of a mobile station at a base station in line zone lOO li! Since the received power from 4 gradually decreases, it becomes necessary for a mobile station during a call to switch one communication channel. The base station detects this decrease in received power.
前記移動局に対して、各無線ゾーンにそれぞれ割当てら
れている所定の制御チャンネルを走査し検索するように
との命令信号を送出する。前記命令信号に対応して、移
動局装置においては、論理回路７による制御作用を介し
て、受信ｆｌ［ＡＪ ５および受信ｆｉ！［ＢＩ ６に
より行なわれている周波数選択ダイパーシティ方式によ
る受信が中止され、移動局における通話は、受信機［Ａ
Ｊ５を用いて行ない、受信機［Ｂ１６の側においては、
論理回路７による処理作用を介して、前記制御チャンネ
ルに対する受信レベル測定を含む走査検索が行なわれる
。この受信機［ＢＩ６の側における走査検索により、各
無線ゾーンに対応する制御チャンネルの受信レベルが測
定・比較され、この結果は複数の無線ゾーン基地局に対
する報告情報として、送信機４およびアンテナ１を介し
て送出される。この報告を受けた基地局においては、報
告内容に含まれる制御チャンネルの比較情報を基にして
、これらの制御チャンネルに対応する無線ゾーンを判別
し、その内の上位圧つの無線ゾーンに対応する基地局に
限定して、これら３基地局における前記移動局からの受
信レベルの測定が行なわれる。この受信レベルの測定結
果を参照して、前記移動局にとって最適の無線ゾーンが
選択され、移動局における所定の通話チャンネルの切替
えが行なわれる。 従って、従来の自動車電話方式おい
ては、通話チャンネルの切替えに当り、！！線ゾーン１
０１゜１０２、１０３．１０４．１０５および１０６等
を含む全無線ゾーンに対応する基地局において、当該移
動局からの受ｆｃ＜レベルを測定する必要があったが、
本発明においては、第２図における無線ゾーン１０１，
１０２および（０３のみに対応する３基地局において測
定を行うことで事が足りることになる２
〔発明の効果〕
以−ト、詳細に説明したように、本発明は、通話中の移
動局における通話チャンネル切替え時に５直配移動局か
らの受信レベルを測定して受信レベルの判定を行なう無
線ゾーン基地局の数を、極めて小数局に限定することに
より、無線ゾーンの選択に至るまでの一連のＩＩＩＲ処
理を簡易化するとともに、近隣無線ゾーンの各基地局に
おける通話用受信機を、受信レベル測定用として使用す
る度合を削減し、当該通話チャンオ・ル切替えの対象外
にある他の無線ゾーンに所在する移動局に対する通話不
能状態を、著しく改善することができるという効果があ
る。A command signal is sent to the mobile station instructing it to scan and search for a predetermined control channel assigned to each radio zone. In response to the command signal, in the mobile station device, reception fl [AJ 5 and reception fi! [Reception using the frequency selective diversity method performed by BI 6 is discontinued, and calls at the mobile station are handled by the receiver [A].
J5, and the receiver [on the B16 side,
Through the processing action of the logic circuit 7, a scanning search including a reception level measurement for the control channel is carried out. Through this scanning search on the side of the receiver [BI 6], the reception level of the control channel corresponding to each wireless zone is measured and compared, and this result is sent to the transmitter 4 and antenna 1 as report information to multiple wireless zone base stations. sent via. The base station that receives this report determines the radio zones corresponding to these control channels based on the control channel comparison information included in the report, and selects the base station corresponding to the top three radio zones. The reception level from the mobile station at these three base stations is measured. Referring to the reception level measurement results, the optimum radio zone for the mobile station is selected, and a predetermined communication channel is switched in the mobile station. Therefore, in the conventional car phone system, when switching the call channel,! ! line zone 1
It was necessary to measure the received fc< level from the mobile station at the base station corresponding to all wireless zones including 01°102, 103.104.105 and 106, etc.
In the present invention, the wireless zone 101 in FIG.
It is sufficient to carry out measurements at the three base stations corresponding to only 102 and 03.2 [Effects of the Invention] As explained in detail below, the present invention provides measurements at the mobile station during a call. By limiting the number of wireless zone base stations that measure the reception level from the 5 direct mobile stations and judge the reception level to a very small number of stations when switching communication channels, the series of steps up to the selection of the wireless zone can be improved. In addition to simplifying the IIIR processing, it reduces the degree to which the telephone receivers at each base station in neighboring wireless zones are used for measuring reception levels, and makes it easier to use receivers in other wireless zones that are not subject to the call channel switching. This has the effect that it is possible to significantly improve the situation in which it is impossible to make a call to the mobile station located there.
図面の簡単な説明
第１図は、本発明の一実施例に含まれる移動局装置のブ
ロック図、第２図は、自動Ｉ！電話方式における無線ゾ
ーンの構成図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a mobile station device included in an embodiment of the present invention, and FIG. 2 is a block diagram of a mobile station device included in an embodiment of the present invention. FIG. 2 is a configuration diagram of a wireless zone in a telephone system.
図において、ｌ・・・・−・アンテナ、２・・・・−・
！！線機部、３・・・・・・デュプレクサ、・４・・・
・・送信機、５・・・・・・・・・受信機［Ａｌ 、
６・・・・・・受信機［Ｂ］ 、 ７・・・・・・論理
回路、８・・・・・・電話機部。In the figure, l...- antenna, 2...--
! ! Line machine section, 3... Duplexer, 4...
...Transmitter, 5...Receiver [Al,
6...Receiver [B], 7...Logic circuit, 8...Telephone unit.
Claims (1)
基地局を配置して構成される自動車電話方式において、
前記移動局に設けられる移動局装置に、当該移動局の通
話中のチャンネル切替え時に、所定の複数の無線ゾーン
基地局からの受信レベルを測定し、前記各無線ゾーン基
地局からの受信レベルを比較する手段と、前記手段によ
り得られる受信レベルの測定比較結果を前記複数の無線
ゾーン基地局に送出する手段と、を備えることを特徴と
する自動車電話方式。In a car telephone system configured by arranging a predetermined wireless zone base station corresponding to a car forming a mobile station,
A mobile station device installed in the mobile station measures reception levels from a plurality of predetermined wireless zone base stations when switching channels during a call by the mobile station, and compares reception levels from each of the wireless zone base stations. and means for transmitting the measurement and comparison results of reception levels obtained by the means to the plurality of wireless zone base stations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1125028A JPH02303236A (en) | 1989-05-17 | 1989-05-17 | Automobile telephone system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1125028A JPH02303236A (en) | 1989-05-17 | 1989-05-17 | Automobile telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02303236A true JPH02303236A (en) | 1990-12-17 |
Family
ID=14900062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1125028A Pending JPH02303236A (en) | 1989-05-17 | 1989-05-17 | Automobile telephone system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02303236A (en) |
-
1989
- 1989-05-17 JP JP1125028A patent/JPH02303236A/en active Pending
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