JPH01246931A - Selective inter-call receiver - Google Patents
Selective inter-call receiverInfo
- Publication number
- JPH01246931A JPH01246931A JP63075009A JP7500988A JPH01246931A JP H01246931 A JPH01246931 A JP H01246931A JP 63075009 A JP63075009 A JP 63075009A JP 7500988 A JP7500988 A JP 7500988A JP H01246931 A JPH01246931 A JP H01246931A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- receiver
- circuit
- signals
- transmission speed
- 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
- 230000005540 biological transmission Effects 0.000 claims description 25
- 230000008054 signal transmission Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 12
- 230000010355 oscillation Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
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- Mobile Radio Communication Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はベージングシステムの個別選択呼出受信機に関
し、特に伝送速度の異なる情報を受信する個別選択呼出
受信機に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an individual selective call receiver for a paging system, and more particularly to an individual selective call receiver that receives information of different transmission speeds.
（従来の技術）
従来、個別選択呼出を行なうシステムの信号方式として
、ＰＯＣ５ＡＧ方式や、ＮＥＣＤ２方式、ＮＥ（：Ｄ３
方式がある。ＰＯ（：ＳＡＧ方式においては、当初この
システムの信号伝送速度は５１２ボーであったが、その
後、伝送情報量の増大から、単位時間あたりの伝送情報
量を増やすために、信号伝送速度を早くして、１２００
ボーを採用するシステムが出現している。(Prior art) Conventionally, as a signaling system for a system that performs individual selective calling, POC5AG system, NECD2 system, NE(:D3
There is a method. In the PO(:SAG system, the signal transmission rate of this system was initially 512 baud, but later on, due to the increase in the amount of information to be transmitted, the signal transmission rate was increased to increase the amount of information to be transmitted per unit time. 1200
Systems are emerging that employ Bo.
上述した従来の伝送速度の５１２ボーのシステムに利用
している個別選択呼出受信機は、新しい伝送速度の１２
００ボーのシステムでは使用できないという欠点がある
。The individual selective call receivers used in the conventional 512 baud system described above are now compatible with the new 12 baud transmission rate system.
The disadvantage is that it cannot be used in 00 baud systems.
本発明の個別選択呼出受信機は、
受信すべき信号の伝送速度それぞれに対応する周波数発
振部と、
受信した信号の伝送速度を検出する信号伝送速度検出部
と、
信号伝送速度検出部が検出した伝送速度により該当する
周波数発振部を選択するスイッチと、前記スイッチが選
択した周波数発振部からの信号に同期して、受信信号を
取込むデコーダ部とを有している。The individual selective calling receiver of the present invention includes: a frequency oscillation section corresponding to each transmission speed of the signal to be received; a signal transmission speed detection section that detects the transmission speed of the received signal; and a signal transmission speed detection section that detects the transmission speed of the received signal. It has a switch that selects a corresponding frequency oscillation section depending on the transmission speed, and a decoder section that takes in a received signal in synchronization with the signal from the frequency oscillation section selected by the switch.
送られてくる情報の伝送速度が時間によって異なってい
ても、受信した情報よりその伝送速度を検出して該当す
る周波数発振部を選択するので、情報の伝送速度に応じ
た受信処理ができる。Even if the transmission speed of the information being sent varies depending on the time, the transmission speed is detected from the received information and the corresponding frequency oscillation unit is selected, so that reception processing can be performed in accordance with the information transmission speed.
次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の個別選択呼出受信機の一実施例を示す
ブロック図である。FIG. 1 is a block diagram showing an embodiment of the individual selective calling receiver of the present invention.
この個別選択呼出受信機は３種の伝送速度の情報を受信
対象としており、空中線１と、ＦＭ受信機２と、信号伝
送速度検出回路３と、デコーダ回路４と、中央処理部５
と、表示部６と、呼出番号記憶部７と表示内容記憶部８
と、周波数発振部であるＸＴＡＬ９．１０．１１と、ス
イッチ１２と、スピーカ１４および１ＪＤ１５を含む警
報回路１３とで構成されている。This individual selective paging receiver receives information on three types of transmission speeds: an antenna 1, an FM receiver 2, a signal transmission speed detection circuit 3, a decoder circuit 4, and a central processing unit 5.
, a display section 6 , a calling number storage section 7 , and a display content storage section 8
, XTAL9.10.11 which is a frequency oscillation unit, a switch 12, and an alarm circuit 13 including a speaker 14 and 1JD15.
ＦＭ受信機では、空中線１を介して受信した信号をディ
ジタル化する。信号体送速度検出回路３はＦＭ受信機２
からのディジタル信号を受けてその信号の伝送速度を検
出し、その旨をスイッチ１２に転送してＸＴＡＬ９，１
０．１１のうち１つを選択する。デコーダ回路４は、ス
イッチ１２を通して送られてくる発振部からの信号に同
期して受信した信号を取込んでその信号から呼出番号を
示す部分を抽出し、呼出番号記憶部７が記憶している、
この受信機の呼出番号と比較して受信した信号がこの受
信機に対する信号か否か判断し、この受信機に対する信
号であれば警報回路１３を起動してスピーカ１４、ＬＥ
Ｄ１５をそれぞれ鳴音、点滅するとともに受信信号を中
央処理部５に転送する。中央処理部５は受信した信号に
表示すべき情報が含まれているか否か調べて、含まれて
いれば表示部６に表示するとともに、表示内容記憶部８
に記憶する。The FM receiver digitizes the signal received via the antenna 1. The signal transmission speed detection circuit 3 is the FM receiver 2
It receives a digital signal from the
Select one out of 0.11. The decoder circuit 4 takes in the signal received in synchronization with the signal from the oscillator sent through the switch 12, extracts a part indicating the calling number from the signal, and stores it in the calling number storage part 7. ,
It is determined whether the received signal is a signal for this receiver by comparing it with the calling number of this receiver, and if it is a signal for this receiver, the alarm circuit 13 is activated and the speaker 14, LE
D15 makes a sound and flashes, respectively, and transfers the received signal to the central processing unit 5. The central processing unit 5 checks whether the received signal contains information to be displayed, and if so, displays it on the display unit 6 and also displays it on the display content storage unit 8.
to be memorized.
次に、本実施例の動作について、この個別選択呼出受信
機を含むベージングシステムの伝送速度を５１２ボー、
１２００ボーおよび２４００ボーの３種類として説明す
る。Next, regarding the operation of this embodiment, the transmission speed of the paging system including this individual selective call receiver is set to 512 baud.
Three types will be explained: 1200 baud and 2400 baud.
ここで、５１２．１２００．２４００ボーに対応する発
振部はそれぞれＸＴＡＬＩ 、ＸＴＡＬ２ 、ＸＴＡＬ
３とする。Here, the oscillators corresponding to 512.1200.2400 baud are XTALI, XTAL2, and XTAL, respectively.
3.
まず、不図示の基地局から送信された信号を空中線１を
介して、ＦＭ受信機２が、受信してディジタル信号化し
て信号伝送速度検出回路３へ転送する。この信号伝送速
度検出回路３では、転送されたディジタル信号の伝送速
度を検出するが、ベージングシステムでの伝送信号の形
態は、最初に前置信号が送られて、つづいて同期信号、
情報信号が送られるため、最初の前置信号を使って伝送
速度の検出を行なう。この検出は、３種の伝送速度５１
２．１２００．２４００の最小公倍数である周波数３８
４００Ｈｚをサンプリング信号として受信信号１周期の
間に存在するサンプリング信号の周期を計数することに
より行ない、この動作を一定の時間内で繰返し行なって
その平均を求めることにより伝送速度を検出することが
できる。すなわち、受信した信号の伝送速度が５１２ボ
ーであれば、その１周期に存在するサンプル信号の周期
は、となり、３７または３８個とな°る。同様にして１
２００ボー、 ２４００ボーの場合はそれぞれ１６個、
８個となる。この動作をｌｏＯｍｓＥ（：の間行なうと
すれば、５１２ボーでは、
となり、受信した信号の２５周期分の計数ができること
になる。ここで、１．９３ｍ５Ｅ（：は５１２ボーの場
合の前置信号の１周期である。同様に、１２００ボー。First, the FM receiver 2 receives a signal transmitted from a base station (not shown) via the antenna 1, converts it into a digital signal, and transfers the digital signal to the signal transmission rate detection circuit 3. This signal transmission speed detection circuit 3 detects the transmission speed of the transferred digital signal, but in the format of the transmission signal in the paging system, a prefix signal is sent first, followed by a synchronization signal,
Since an information signal is sent, the first prefix signal is used to detect the transmission rate. This detection is performed at three transmission speeds: 51
Frequency 38 which is the least common multiple of 2.1200.2400
This is done by counting the period of the sampling signal that exists during one period of the received signal using 400Hz as the sampling signal, and by repeating this operation within a certain period of time and finding the average, the transmission speed can be detected. . That is, if the transmission rate of the received signal is 512 baud, the number of sample signals present in one cycle is 37 or 38. Similarly, 1
16 pieces each for 200 baud and 2400 baud,
There will be 8 pieces. If this operation is performed for loOmsE(:, then at 512 baud, it becomes 25 cycles of the received signal can be counted.Here, 1.93m5E(: is the prefix signal at 512 baud) Similarly, 1200 baud.
２４００ボーの場合は、それぞれ６０周期、 １２０周
期分の計数ができる。この計数の後、計数した周期分の
平均を求めて、サンプル信号の存在する周期数として伝
送速度を検出する。In the case of 2400 baud, it is possible to count 60 cycles and 120 cycles, respectively. After this counting, the average of the counted periods is calculated, and the transmission speed is detected as the number of periods in which the sample signal exists.
このようにして検出した伝送速度が１２００ボーであっ
たとすると、信号伝送速度検出部３は、その旨をスイッ
チ１２に伝えてＸＴＡＬＩＯを選択する。そして、ＸＴ
ＡＬＩＯの出力信号がスイッチ１２を介してデコーダ回
路４に送られて、その信号に同期して、信号伝送速度検
出回路３から受信信号を受取って、その信号がこの受信
機に対する信号か否か判断して、この受信機に対する信
号でなければ、その時点で処理を終了し、この受信機に
対する信号であれば、警報回路１３を起動して受信信号
を中央処理部５に転送する。中央処理部５では受信信号
に表示すべき情報が含まれているか否かを判断して、含
まれていれば表示部６に表示して、表示内容記憶部８に
記憶する。If the transmission rate detected in this manner is 1200 baud, the signal transmission rate detection unit 3 notifies the switch 12 of this fact and selects XTALIO. And XT
The output signal of ALIO is sent to the decoder circuit 4 via the switch 12, and in synchronization with the signal, the received signal is received from the signal transmission speed detection circuit 3, and it is determined whether the signal is a signal for this receiver. If the signal is not for this receiver, the process is terminated at that point, and if the signal is for this receiver, the alarm circuit 13 is activated and the received signal is transferred to the central processing unit 5. The central processing unit 5 determines whether the received signal includes information to be displayed, and if so, displays it on the display unit 6 and stores it in the display content storage unit 8.
（発明の効果）
以上説明したように本発明は、信号伝送速度を自動検出
することにより、それぞれのシステムの伝送速度に自動
的に同期して受信信号の解読等の処理ができるので、信
号伝送速度の異なる複数のシステムに対して改造や、予
め設定された伝送速度への切替等の操作をしないので、
そのまま、同一の個別選択呼出受信機を使用できるとい
う効果があり、単位時間当りの伝送情報量を増すために
信号伝送速度を上げている、情報量の多い都市や、伝送
距離を稼ぐために可能な限り信号伝送速度を下げている
比較的情報量の少ない郊外においても同一の個別選択呼
出受信機を使えることになる。(Effects of the Invention) As explained above, the present invention automatically detects the signal transmission speed and automatically synchronizes with the transmission speed of each system to perform processing such as decoding the received signal. Since there is no need to modify multiple systems with different speeds or switch to a preset transmission speed,
This has the effect of allowing the same individual selective calling receiver to be used as is, and is useful in cities with a large amount of information, where the signal transmission speed is increased to increase the amount of information transmitted per unit time, or to increase transmission distance. This means that the same individual selective calling receiver can be used even in suburban areas where the amount of information is relatively low and where the signal transmission speed is reduced.
第１図は本発明の個別選択呼出受信機の一実施例を示す
ブロック図である。
１・・・空中線、 ２−ＦＭ受信機、３・・・
信号伝送速度検出回路、
４・・・デコーダ回路、 ５・・・中央処理部、６・・
・表示部、 ７・・・呼出番号記憶部、８−・表
示内容記憶部、
９．１０．１ｌ−ＸＴＡＬ、 １２−２イツチ、
１３−・・警報回路、 １４・・・スピーカ、＋
５−ＬＥＤ 。FIG. 1 is a block diagram showing an embodiment of the individual selective calling receiver of the present invention. 1-Antenna, 2-FM receiver, 3-
Signal transmission speed detection circuit, 4... Decoder circuit, 5... Central processing unit, 6...
-Display unit, 7--Call number storage unit, 8--Display content storage unit, 9.10.1l-XTAL, 12-2ichi,
13-...Alarm circuit, 14...Speaker, +
5-LED.
Claims (1)
振部と、 受信した信号の伝送速度を検出する信号伝送速度検出部
と、 信号伝送速度検出部が検出した伝送速度により該当する
周波数発振部を選択するスイッチと、前記スイッチが選
択した周波数発振部からの信号に同期して、受信信号を
取込むデコーダ部とを有することを特徴とする個別選択
呼出受信機。[Claims] 1. In an individual selective calling receiver, a frequency oscillator corresponding to each transmission speed of the signal to be received, a signal transmission speed detection section that detects the transmission speed of the received signal, and a signal transmission speed. It is characterized by comprising a switch that selects a corresponding frequency oscillation section based on the transmission speed detected by the detection section, and a decoder section that takes in the received signal in synchronization with the signal from the frequency oscillation section selected by the switch. Individual selective call receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63075009A JPH01246931A (en) | 1988-03-28 | 1988-03-28 | Selective inter-call receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63075009A JPH01246931A (en) | 1988-03-28 | 1988-03-28 | Selective inter-call receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01246931A true JPH01246931A (en) | 1989-10-02 |
Family
ID=13563763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63075009A Pending JPH01246931A (en) | 1988-03-28 | 1988-03-28 | Selective inter-call receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01246931A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6272318B1 (en) | 1997-06-05 | 2001-08-07 | Nec Corporation | Pager capable of automatically switching and setting a plurality of transmission speeds |
-
1988
- 1988-03-28 JP JP63075009A patent/JPH01246931A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6272318B1 (en) | 1997-06-05 | 2001-08-07 | Nec Corporation | Pager capable of automatically switching and setting a plurality of transmission speeds |
| KR100297659B1 (en) * | 1997-06-05 | 2001-10-26 | 가네꼬 히사시 | Pager to automatically switch and set multiple baud rates |
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