JPH0716261B2 - Wireless selective calling device - Google Patents
Wireless selective calling deviceInfo
- Publication number
- JPH0716261B2 JPH0716261B2 JP61148706A JP14870686A JPH0716261B2 JP H0716261 B2 JPH0716261 B2 JP H0716261B2 JP 61148706 A JP61148706 A JP 61148706A JP 14870686 A JP14870686 A JP 14870686A JP H0716261 B2 JPH0716261 B2 JP H0716261B2
- Authority
- JP
- Japan
- Prior art keywords
- mobile station
- selective calling
- calling device
- base station
- signal
- 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
- 238000001514 detection method Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、車載等移動無線の使用者が、車等を離れた場
合に用いるに適した無線選択呼出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective calling device suitable for use when a user of mobile radio such as vehicle-mounted equipment leaves a vehicle or the like.
従来の技術 従来この種の無線選択呼出装置３は第４図に示すよう
に、基地局１から周波数f1で移動局２を呼び出し、一方
移動局２からは周波数f2で応答する場合に、移動局２の
呼出しと同じ周波数f1で呼出していた。2. Description of the Related Art Conventionally, as shown in FIG. 4, a radio selective calling device 3 of this type calls a mobile station 2 from a base station 1 at a frequency f 1 while responding at a frequency f 2 from a mobile station 2, The mobile station 2 was calling at the same frequency f 1 as the calling.
発明が解決しようとする問題点 しかしながら、上記従来の無線選択呼出装置では、内蔵
型のアンテナのためアンテナ利得が低く、さらには、利
用者が建物内部や建物の陰に入った場合には、大きな電
波伝播上の減衰を受け、車載の移動局に比べて受信機へ
の受信入力電界レベルは低くなるため、戸外にある車載
の移動局では、基地からの選択呼出信号を受信出来て
も、受信出来ないという欠点があった。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described conventional radio selective calling device, the antenna gain is low because of the built-in antenna, and further, when the user enters the inside of the building or the shade of the building, it is large. The reception input electric field level to the receiver is lower than that of the in-vehicle mobile station due to attenuation due to radio wave propagation, so even if the in-vehicle mobile station outdoors can receive the selective call signal from the base, It had the drawback of not being able to do it.
本発明は、この様な従来の問題を解決するものであり、
移動無線装置が呼出しを受けた場合は、上記利用者が、
車から離れていても着信があったことを知る事が出来る
無線選択呼出装置を提供する事を目的とするものであ
る。The present invention solves such a conventional problem,
When the mobile wireless device receives a call, the above user
It is an object of the present invention to provide a wireless selective calling device that can know that an incoming call has arrived even if the user is away from the vehicle.
問題点を解決するための手段 本発明は上記目的を達成するために、車載の移動局の送
信周波数を受信周波数とする受信機と、車載の移動局が
基地からの選択呼出を着信した時、基地局へ対して送信
する応答信号を検出する検出機とを備えた無線選択呼出
装置を車から離れて行動する利用者に携帯させるもので
ある。Means for Solving the Problems In order to achieve the above object, the present invention provides a receiver having a transmission frequency of an on-vehicle mobile station as a reception frequency, and when the on-vehicle mobile station receives a selective call from a base, A wireless selective calling device equipped with a detector for detecting a response signal transmitted to a base station is carried by a user who moves away from a vehicle.
作用 本発明は上記のような構成であるので、人が携帯して建
物内等で受信する場合に、移動局を介して呼び出すよう
に構成することにより、基地局から直接呼出す場合に比
較して無線選択呼出装置に対してより高い受信電圧を供
給する効果を得るものである。Effect Since the present invention has the above-described configuration, when a person carries it and receives it in a building or the like, it is configured so as to call through a mobile station, so that it is compared with a case where a call is directly made from a base station. The effect of supplying a higher reception voltage to the radio selective calling device is obtained.
実施例 第１図は本発明の原理を説明するための図である。第１
図において、１は基地局、２は移動局、３は本発明の無
線選択呼出装置、４は建物、f1は基地局送信周波数であ
り、音声信号および呼出信号や種々のデータ信号等を移
動局２に向けて送出する。f2は移動局送信周波数であ
り、基地局１からの呼出しに対する応答信号又は発呼信
号に続けて種々のデータ信号および音声信号を送出す
る。無線選択呼出装置３は移動局２の利用者が車を離れ
るとき携帯する受信装置であり、その受信周波数は移動
局送信周波数f2を用いている。Embodiment FIG. 1 is a diagram for explaining the principle of the present invention. First
In the figure, 1 is a base station, 2 is a mobile station, 3 is a radio selective calling device of the present invention, 4 is a building, f 1 is a base station transmission frequency, and voice signals and calling signals and various data signals are moved. It is sent to the station 2. f 2 is a mobile station transmission frequency and sends out various data signals and voice signals following a response signal or a call signal to the call from the base station 1. The radio selective calling device 3 is a receiving device that the user of the mobile station 2 carries when leaving the vehicle, and the reception frequency thereof is the mobile station transmission frequency f 2 .
いま、移動局２の通信限界（電圧）を0dBμとした場合
に、無線選択呼出装置３は10〜15dB受信感度が低下して
いる。これは装置内にアンテナを収納するために必要な
空間が得られないためである。無線選択呼出装置３は基
地局１の送信周波数を受信するのではなく、移動局２の
送信周波数を受信するように設定されている。例えば、
無線選択呼出装置３の行動域を移動局２を中心として半
径100m、λ＝0.3m、建物４の侵入損失LH＝20dB、建物４
内の減衰度Lh＝kldB、ｋは減衰定数、ｌを壁からの距離
ｍとし、ｋ＝0.5、ｌ＝20mの条件を与えた場合、移動局
２からの伝搬損失LtはLt＝Lf＋LH＋Lh dBで表示され
る。こゝで、Lfは自由空間値損失20log10（４π d／λ）
G1・G2とすると、Lt＝70＋20＋10＝100dBとなり、移動
局２の送信出力が5Wのときの受信入力は50dBμとなる。
この受信レベルは無線選択呼出装置３の受信限界レベル
10〜15dBμより充分高い値である。これに対して基地局
送信周波数f1に対する受信レベルは移動局の受信レベル
Pr＝0dBに対して建物内ではLH＋Lh＝30dB減衰され、受
信入力は−30dBμとなる。以上、本発明は受信レベルを
改善し極めて大きな効果が得られる。Now, when the communication limit (voltage) of the mobile station 2 is set to 0 dBμ, the radio selective calling device 3 has lowered the receiving sensitivity by 10 to 15 dB. This is because the space required for housing the antenna cannot be obtained in the device. The radio selective calling device 3 is set not to receive the transmission frequency of the base station 1 but to receive the transmission frequency of the mobile station 2. For example,
The range of action of the radio selective calling device 3 is 100 m in radius around the mobile station 2, λ = 0.3 m, intrusion loss L H = 20 dB in building 4, building 4
Where attenuation is Lh = kldB, k is the attenuation constant, l is the distance m from the wall, and given the conditions of k = 0.5 and l = 20m, the propagation loss Lt from the mobile station 2 is Lt = Lf + L H + Lh Displayed in dB. Thisゝa, Lf is the free-space value loss 20log10 (4 π d / λ)
If G 1 and G 2 are set, Lt = 70 + 20 + 10 = 100 dB, and the reception input when the transmission output of the mobile station 2 is 5 W is 50 dBμ.
This reception level is the reception limit level of the radio selective calling device 3.
The value is sufficiently higher than 10 to 15 dBμ. On the other hand, the reception level for the base station transmission frequency f 1 is the reception level of the mobile station.
In the building against Pr = 0 dB is L H + Lh = 30dB attenuation, receiving input becomes -30DBmyu. As described above, the present invention improves the reception level and obtains an extremely large effect.
第２図は基地局１から移動局２へ、また、移動局２から
基地局１への信号構成を示している。第２図において、
（Ａ）は基地局１からの移動局２への下り信号の１例で
あり、21は同期信号S1、22は移動局２に対する種々のデ
ータ信号D1、（Ｂ）は移動局２から基地局１への上り信
号の１例である。23は無信号のタイミング時間であり、
例えば、送信機出力の立上り時間G2をあらかじめ見越し
て与えた時間である。24は同期信号S2、25は移動局から
基地局への応答のためのデータ信号D2である。FIG. 2 shows a signal configuration from the base station 1 to the mobile station 2 and from the mobile station 2 to the base station 1. In FIG.
(A) is an example of a downlink signal from the base station 1 to the mobile station 2, 21 is a synchronization signal S 1 , 22 is various data signals D 1 for the mobile station 2, and (B) is from the mobile station 2. It is an example of an upstream signal to the base station 1. 23 is the timing time of no signal,
For example, it is a time given in advance in anticipation of the rise time G 2 of the transmitter output. Reference numeral 24 is a synchronization signal S 2 , and 25 is a data signal D 2 for a response from the mobile station to the base station.
第３図は上記第２図の信号の詳細構成の１例を示してい
る。第３図において、第２図の同期信号21はビット同期
信号31およびフレーム同期信号32から形成されている。
第２図のデータ信号22はコントロール・データ33および
種々の伝送情報信号34,35,36等から構成されており、前
記コントロール・データ33には移動局識別番号を含んで
いる。移動無線局は基地局からのコントロール・データ
33に含まれた移動局識別番号をメモリーの番号と照合し
て一致した場合に送信機を起動させて移動局番号を含む
コントロール・データ33を含むデータ信号を送信する。
ここで、無線選択呼出装置３の個別呼出番号は移動局２
の番号と同じであり、その受信周波数は移動局の送信周
波数f2であるから基地局１からの呼出しに対する移動局
２の応答信号に含まれるコントロール・データ33を傍受
することによって基地局１からの呼出しを知ることがで
きる。FIG. 3 shows an example of a detailed configuration of the signals shown in FIG. In FIG. 3, the sync signal 21 of FIG. 2 is formed of a bit sync signal 31 and a frame sync signal 32.
The data signal 22 of FIG. 2 is composed of control data 33 and various transmission information signals 34, 35, 36, etc. The control data 33 includes a mobile station identification number. Mobile radio station is control data from base station
The mobile station identification number contained in 33 is compared with the memory number, and if they match, the transmitter is activated and a data signal containing control data 33 containing the mobile station number is transmitted.
Here, the individual call number of the radio selective calling device 3 is the mobile station 2
, And its reception frequency is the transmission frequency f 2 of the mobile station. Therefore, by intercepting the control data 33 included in the response signal of the mobile station 2 to the call from the base station 1, You can know the call of.
なお、無線選択呼出装置３が応答信号25のコントロール
・データ33に含まれる移動局２の選択呼出信号を検知手
段で検知した場合は普通のセレコール機器のように報知
手段により音響的に使用者に報知したり、発光素子や液
晶素子等各種表示方法により着信および後続するデータ
を表示することができる。When the radio selective calling device 3 detects the selective calling signal of the mobile station 2 included in the control data 33 of the response signal 25 by the detecting means, the user is acoustically notified by the notifying means like an ordinary select call device. It is possible to notify and to display incoming and subsequent data by various display methods such as a light emitting element and a liquid crystal element.
発明の効果 本発明は上記実施例より明らかなように、以下に示す効
果を有する。EFFECTS OF THE INVENTION The present invention has the following effects, as is apparent from the above-described embodiments.
（１）基地局送信波を直接受信する場合は移動局受信機
との感度差により例えば10〜15dB低いため、利用者が車
を離れたときは基地局からの呼出しを感知できない場合
があるが、移動局送信波を受信するように設定している
ので、移動局が感知すれば移動局から例えば100m以上離
れたビルディング内でも楽々と移動局への着信を感知で
きる。(1) When the base station transmission wave is directly received, it may be lower by 10 to 15 dB due to the difference in sensitivity with the mobile station receiver, so when the user leaves the car, the call from the base station may not be detected. Since the mobile station is set to receive the transmitted wave, the mobile station can easily detect an incoming call to the mobile station even in a building 100 m or more away from the mobile station.
（２）無線選択呼出装置に基地局からの着信を知らせる
のに特別に無線送信機を必要とせず、移動局送信と同周
波数の受信機と移動局と同番号にすることにより等極め
て簡単な方法で目的を達成できる。(2) No special radio transmitter is required to notify the radio selective calling device of an incoming call from the base station, and it is extremely simple to use the same number as the mobile station transmission and the same frequency as the mobile station transmission. You can achieve your goals in any way.
第１図は本発明の一実施例における無線選択呼出装置を
使うシステム構成図、第２図は同装置に用いる基地局お
よび移動局間の信号構成図、第３図は同じく信号構成の
詳細図、第４図は従来の無線選択呼出装置の用い方を説
明するための説明図である。 １…基地局、２…移動局、３…無線選択呼出装置、f1…
基地局送信周波数、f2…移動局送信周波数。FIG. 1 is a system configuration diagram using a radio selective calling device according to an embodiment of the present invention, FIG. 2 is a signal configuration diagram between a base station and a mobile station used in the device, and FIG. 3 is a detailed diagram of the same signal configuration. , FIG. 4 is an explanatory diagram for explaining how to use a conventional radio selective calling device. 1 ... Base station, 2 ... Mobile station, 3 ... Radio selective calling device, f 1 ...
Base station transmission frequency, f 2 ... mobile station transmission frequency.
Claims (1)
使用する無線選択呼出装置とを備え、上記基地局から上
記移動局を第１の無線周波数の信号によって呼び出し、
呼び出された上記移動局が上記基地局に対して選択呼出
番号を付加した第２の無線周波数の信号によって応答信
号を送出する移動無線において、上記無線選択呼出装置
は上記移動局から上記基地局へ送出される選択呼出番号
を付加した上記第２の無線周波数の信号と同一の信号を
受信する受信手段と、上記選択呼出番号を検出する検出
手段と、この検出手段の検出結果に基づき報知する報知
手段とを備えた無線選択呼出装置。1. A base station, a mobile station, and a radio selective calling device used in the vicinity of the mobile station, wherein the base station calls the mobile station with a signal of a first radio frequency,
In a mobile radio in which the called mobile station sends a response signal to the base station by a signal of a second radio frequency to which a selective call number is added, the radio selective calling device sends the response signal from the mobile station to the base station. Receiving means for receiving the same signal as the signal of the second radio frequency to which the selective calling number to be transmitted is added, detecting means for detecting the selective calling number, and notification for notifying based on the detection result of the detecting means. And a wireless selective calling device having means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61148706A JPH0716261B2 (en) | 1986-06-25 | 1986-06-25 | Wireless selective calling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61148706A JPH0716261B2 (en) | 1986-06-25 | 1986-06-25 | Wireless selective calling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS635631A JPS635631A (en) | 1988-01-11 |
| JPH0716261B2 true JPH0716261B2 (en) | 1995-02-22 |
Family
ID=15458774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61148706A Expired - Fee Related JPH0716261B2 (en) | 1986-06-25 | 1986-06-25 | Wireless selective calling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0716261B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2515077Y2 (en) * | 1993-11-11 | 1996-10-23 | 怡利電子工業股▲ひん▼有限公司 | Incoming call notification device for wireless telephone |
| EP3252015B1 (en) * | 2015-01-27 | 2020-08-12 | Powdertech Co., Ltd. | Plate-shaped ferrite particles for pigment which exhibit metallic lustre |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146005A (en) * | 1974-10-18 | 1976-04-20 | Hitachi Ltd |
-
1986
- 1986-06-25 JP JP61148706A patent/JPH0716261B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS635631A (en) | 1988-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |