JP2009188653A - Telemeter system - Google Patents
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本発明は、監視局と複数の観測局とからなるテレメータシステムにおいて、監視局から観測局へ一括呼出信号を送出し、観測局が観測データを送信する一括呼出方式で、監視局でのデータ収集を効率よく行なうことに関する。 The present invention relates to a collective paging system in which a monitoring station and a plurality of observation stations transmit a collective paging signal from the monitoring station to the observation station, and the observation station transmits observation data. It is related with performing efficiently.
テレメータシステムでは、データ収集の伝送方式として、伝送フォーマット、信号送出タイムチャート、伝送手順等を定めた標準仕様書が整備され、個々のシステム構築に際しての、標準仕様に基づくシステム設計が行われていることが多い。 In the telemeter system, standard specifications that specify transmission formats, signal transmission time charts, transmission procedures, etc. are prepared as transmission methods for data collection, and system design based on the standard specifications is being performed when building individual systems. There are many cases.
テレメータシステムに求められる要件の一つとして、観測局が観測データをできるだけ速く上位装置へ送出することがあり、テレメータシステムでは全観測局のデータ収集時間の許容値を設定し、この許容値内にデータ収集を完了するようにしている。 One requirement of the telemeter system is that the observation station sends the observation data to the host device as quickly as possible. The telemeter system sets a tolerance value for the data collection time of all observation stations, and within this tolerance value. The data collection is completed.
図１は監視局と複数の観測局（観測局１、観測局２、・・・、観測局Ｎ）によるテレメータシステムの構成例である。一括呼出制御方式のテレメータシステムでは、監視局から観測局へ向けて呼出を行い、観測局が予め定められた手順にしたがって観測データを監視局へ送信する。
監視局と複数の観測局との間の伝送路（伝送路１、伝送路２、・・・、伝送路Ｎ）の構成形態は、無線伝送路と有線伝送路が混在する場合と、いずれか一方のみの場合とがある。
FIG. 1 is a configuration example of a telemeter system including a monitoring station and a plurality of observation stations (observation station 1, observation station 2,..., Observation station N). In a collective call control type telemeter system, a call is made from a monitoring station to an observation station, and the observation station transmits observation data to the monitoring station according to a predetermined procedure.
The configuration form of the transmission path (transmission path 1, transmission path 2,..., Transmission path N) between the monitoring station and the plurality of observation stations is either a case where a wireless transmission path and a wired transmission path coexist. There is a case of only one.
無線伝送路では無線回線特有のフェージングが避けられないため、回線設計に際して必要なフェージングマージンを見込むことでシステム全体としての品質と信頼性等を確保している。 Since fading peculiar to a radio channel is unavoidable in a radio transmission path, the quality and reliability of the entire system are ensured by considering a fading margin necessary for channel design.
図２は、監視局が観測局に対して一括呼出を行い、各観測局が予め定められた手順にしたがい応答する様子を示したタイミングチャート例である。まず、監視局が観測局１、観測局２および観測局３に向けて通常の伝送速度で３連送の一括呼出信号２０１を送出する。ここで、標準仕様化された機器では複数の伝送速度が準備されており、個々のシステムの設計に際して適切な伝送速度が選定されており、通常の伝送速度とは、そのように選定された伝送速度を表している。観測局１、観測局２および観測局３は、監視局からの一括呼出信号２０１を受信すると、装置の電源を起動し、スケルチレベルを検出し、返送信号の送出準備を行う２０２。一括呼出信号の送出が完了してから、予め定められた時間が経過すると、観測局１が返送信号ｃ１、２０４を、観測局２が返送信号ｃ２、２０５を、観測局３が観測データｃ３、２０６を、それぞれ順番に監視局へ向けて送出する。各観測局は返送信号を送出すると、装置電源を断とし、一括呼出に対する応答を終了する。監視局は各観測局からの観測データを順次受信２０７し、観測データの収集を完了する。 FIG. 2 is an example of a timing chart showing a state in which the monitoring station makes a collective call to the observation station and each observation station responds according to a predetermined procedure. First, the monitoring station sends a three-call batch call signal 201 to the observation station 1, the observation station 2, and the observation station 3 at a normal transmission rate. Here, multiple transmission speeds are prepared for standardized equipment, and appropriate transmission speeds are selected when designing individual systems. The normal transmission speed is the transmission speed selected as such. Expresses speed. When the observation station 1, the observation station 2, and the observation station 3 receive the collective calling signal 201 from the monitoring station, the observation station 1, the observation station 2, and the observation station 3 activate the power source of the apparatus, detect the squelch level, and prepare 202 for sending a return signal. When a predetermined time elapses after the transmission of the collective calling signal is completed, the observation station 1 sends the return signals c1, 204, the observation station 2 sends the return signals c2, 205, the observation station 3 sends the observation data c3, 206 are sent to the monitoring station in order. When each observation station sends a return signal, it turns off the apparatus power and ends the response to the collective call. The monitoring station sequentially receives 207 observation data from each observation station and completes collection of the observation data.
しかしながら、監視局が一部の観測局からの観測データを正常に受信出来ず、観測データの収集を完了できない場合もある。
監視局が観測局からの観測データを正常に受信出来ない形態としては、観測局からの電波を受信できているが観測データを正常に復調、復号出来ない場合と、観測局からの電波自体の着信が確認できない場合とがある。前者は、観測局が観測データ（電波）を送出したにもかかわらず、観測局から監視局へ向かう上り回線のＳ／Ｎ不足により監視局側で正常に復調、復号出来ていない可能性が高く、後者は、観測局が監視局からの一括呼出信号を認識出来なかかったために観測データ（電波）を送出していない可能性が高い。
However, there are cases where the monitoring station cannot normally receive observation data from some observation stations and cannot complete the collection of observation data.
The monitoring station cannot normally receive the observation data from the observation station, but it can receive radio waves from the observation station but cannot properly demodulate and decode the observation data. Incoming calls may not be confirmed. In the former case, there is a high possibility that the monitoring station cannot correctly demodulate and decode the data due to a lack of uplink S / N from the observation station to the monitoring station, even though the observation station has sent observation data (radio waves). In the latter case, there is a high possibility that observation data (radio waves) are not transmitted because the observation station cannot recognize the collective paging signal from the monitoring station.
図３は、一括呼出に対して、監視局が一部の観測局からの観測データの収集を完了できない態様を示したもので、以下に順を追って説明する。
まず、監視局が観測局１、観測局２および観測局３に対して通常の伝送速度で一括呼出信号（三連送）３０１を送出し、観測局１、観測局２および観測局３が電源を起動し、スケルチレベルを検出し、観測データの送出準備をおこない３０２、順次、観測データｃ１、３０４、観測データｃ２、３０５及び観測データｃ３、３０６を送出する。これに対し、監視局は、観測局１からの観測データｃ１、３０４および観測局２からの観測データｃ２、３０５を受信できたが、観測局３からの観測データｃ３、３０６は正常に受信出来なかった（×印）。
次に、監視局は、標準仕様の伝送手順に則り、観測局３に対して個別呼出信号ｂ、３０８を送出する。すると、観測局３が再び電源を起動し、スケルチレベルを検出３０９し、観測データｄ、３１０を監視局へ送出するが、当初の一括呼出に対する送出と同じ伝送速度であるため、上り回線（観測局３→観測局）のＳ／Ｎが改善されていない限り、監視局では正常な受信が出来ない状況が繰り返される３１１可能性が高い（×印）。
FIG. 3 shows an aspect in which the monitoring station cannot complete the collection of observation data from some observation stations in response to the collective call, and will be described below in order.
First, the monitoring station sends a collective calling signal (triple transmission) 301 to the observation station 1, the observation station 2 and the observation station 3 at a normal transmission rate, and the observation station 1, the observation station 2 and the observation station 3 are powered. , Squelch level is detected, observation data is prepared for transmission 302, observation data c 1, 304, observation data c 2, 305 and observation data c 3 306 are sequentially transmitted. In contrast, the monitoring station can receive the observation data c1 and 304 from the observation station 1 and the observation data c2 and 305 from the observation station 2, but the observation data c3 and 306 from the observation station 3 can be received normally. There was no (× mark).
Next, the monitoring station sends individual call signals b and 308 to the observation station 3 in accordance with the standard transmission procedure. Then, the observation station 3 starts the power supply again, detects the squelch level 309, and sends the observation data d and 310 to the monitoring station. However, since the transmission speed is the same as that for the initial batch call, the uplink (observation) Unless the S / N of the station 3 → observation station) is improved, there is a high possibility that the monitoring station will not be able to receive normally (3 ×).
図４は、一括呼出に対して、監視局が観測局からの観測データの収集を完了できない他の態様を示したもので、以下に順を追って説明する。
まず、監視局が観測局１、観測局２および観測局３に対して通常の伝送速度で一括呼出信号４０１を送出する。観測局側では、観測局１および観測局２は正常に受信できた４０２が、観測局３は三連送の呼出信号のいずれに対しても受信出来なかった（×印）。観測局３が一括呼出信号を正常に受信できない主な要因は、下り回線（監視局→観測局３）のＳ／Ｎ不足の可能性が高い。この場合、当然ながら、監視局では、観測局１からの観測データｃ１、４０４及び観測局２からの観測データｃ２、４０５は正常に受信できるが、観測局３からの観測データ（電波）が送出されないため、監視局では観測局３からの電波を受信できない。
次に、監視局は、標準仕様の伝送手順に則り、観測局３に対して個別呼出信号ｂ、４０８を送出するが、当初の一括呼出に対する送出と同じ伝送速度であるため、下り回線（監視局→観測局３）のＳ／Ｎが改善されていない限り、観測局３は正常な受信が出来ず、観測データ（電波）の送出を行わないため、監視局では観測局３からの観測データ（電波）を受信できない状況４１１が繰り返される（×印）。
FIG. 4 shows another mode in which the monitoring station cannot complete the collection of the observation data from the observation station in response to the collective call, and will be described below in order.
First, the monitoring station sends a collective calling signal 401 to the observation station 1, the observation station 2, and the observation station 3 at a normal transmission rate. On the observation station side, the observation station 1 and the observation station 2 were able to normally receive 402, but the observation station 3 was not able to receive any of the three consecutive call signals (× mark). The main factor that the observation station 3 cannot normally receive the collective calling signal is highly likely that the S / N shortage of the downlink (monitoring station → observation station 3) is insufficient. In this case, of course, the monitoring station can normally receive the observation data c1 and 404 from the observation station 1 and the observation data c2 and 405 from the observation station 2, but the observation data (radio wave) from the observation station 3 is transmitted. Therefore, the monitoring station cannot receive radio waves from the observation station 3.
Next, the monitoring station sends the individual call signals b and 408 to the observation station 3 in accordance with the standard transmission procedure, but since it has the same transmission rate as the transmission for the initial collective call, the downlink (monitoring) Unless the S / N of the station → observation station 3) is improved, the observation station 3 cannot receive normally and does not transmit observation data (radio waves). The situation 411 in which (radio wave) cannot be received is repeated (x mark).
適切な回線設計を行ったにも拘わらず、無線区間のフェージングに起因する回線Ｓ／Ｎ劣化などのために、個別呼出を行っても情報収集が円滑に行えず、結果としてデータ収集時間が増加してしまうという問題があった。 Despite proper line design, information collection cannot be performed smoothly even if individual calls are made due to line S / N degradation caused by fading in the radio section, resulting in an increase in data collection time. There was a problem of doing.
本発明はこのような背景のもとで行われたもので、情報収集にかかる伝送手順の一部を見直すことで、回線Ｓ／Ｎの劣化などに起因するデータ収集時間の増加を抑制することに関する。 The present invention has been made under such a background, and by reviewing part of the transmission procedure for collecting information, it is possible to suppress an increase in data collection time due to degradation of the line S / N. About.
監視局と複数の観測局とからなり、監視局が観測局へ一括呼出信号を送出し、各観測局が観測データを監視局へ順次送信する一括呼出制御方式のテレメータシステムにおいて、一括呼出信号の最前部に、観測局の装置が設定し得る最も速い伝送速度で一括呼出信号を受信し及び観測データを送信させる制御信号を付加し、また、監視局において受信不能の観測局があった場合に対象となる観測局に対しておこなう個別呼出信号の最前部に、当該観測局の装置が設定し得る最も遅い伝送速度で個別呼出信号を受信し及び観測データを送信させる制御信号を付加することで、監視局が観測局に対して伝送速度変更の制御を行う。 In a telemetry system with a collective call control system that consists of a monitoring station and a plurality of observation stations, the monitoring station sends a collective paging signal to the observation station, and each observation station sequentially transmits observation data to the monitoring station. When there is an observation station that cannot receive at the monitoring station, a control signal that receives the collective paging signal and transmits the observation data at the fastest transmission speed that can be set by the observation station device is added to the front. By adding a control signal for receiving the individual call signal and transmitting the observation data at the slowest transmission speed that can be set by the device of the observation station, to the forefront of the individual call signal to be performed for the target observation station The monitoring station controls the transmission speed change for the observation station.
一括呼出制御方式にかかる伝送手順で、受信できない観測局に対する個別呼出に関して本発明を適用することにより、無線伝送区間のＳ／Ｎ劣化などにより長くなりがちなテレメータシステムのデータ収集時間の増加を、従来の標準手順による場合よりも抑制できる。 By applying the present invention with respect to individual calls to observation stations that cannot be received in the transmission procedure according to the collective call control method, it is possible to increase the data collection time of the telemeter system, which tends to be long due to S / N degradation of the wireless transmission section, etc. This can be suppressed as compared with the conventional standard procedure.
以下に本発明の実施形態について図面を示しながら説明する。なお、本例は実施形態の一部を示すものであり本発明の技術的範囲を限定するものではない。 Embodiments of the present invention will be described below with reference to the drawings. In addition, this example shows a part of embodiment and does not limit the technical scope of the present invention.
図５は、監視局が一括呼出を行う際、従来の伝送手順による一括呼出信号（三連送）５０４の前部に、本発明が提案する伝送速度変更指令信号５０１を付加した一括呼出信号５００を示したものである。下り回線（監視局→観測局）および上り回線（観測局→監視局）の回線品質が共に設計値を満たしていれば、標準仕様に基づく伝送手順に、本発明が提案する伝送速度変更指令信号５０１に拘わる処理時間が増分として加算されるが、全体時間に対する増加率は僅少にとどまる。 FIG. 5 shows a collective paging signal 500 in which a transmission rate change command signal 501 proposed by the present invention is added to the front part of a collective paging signal (three consecutive transmissions) 504 according to a conventional transmission procedure when the monitoring station performs collective paging. Is shown. If the channel quality of both the downlink (monitoring station → observation station) and the uplink (observation station → monitoring station) satisfy the design value, the transmission rate change command signal proposed by the present invention is used in the transmission procedure based on the standard specifications. Although the processing time related to 501 is added as an increment, the rate of increase relative to the total time remains small.
図６は、監視局が一括呼出を行う際、従来の一括呼出信号（三連送）６０４の前部に、本発明で提案する伝送速度変更指令信号６０１を付加した一括呼出信号６００を送信したところ、観測局３からの信号ｃ３、６０９を監視局が正常に受信出来なかった様子６１０を示したものである（×印）。ここでは上り回線（観測局３→監視局）のＳ／Ｎが回線設計値よりも低く、監視局で正常な受信ができない状況となっている可能性が高い。
このような場合、本発明は、正常に信号を受信できなかった観測局３へ向けた個別呼出信号（１回）６１３の前部に、伝送速度変更指令信号６１１を付加する。伝送速度変更指令信号６１１は、観測局３に対して、電源起動とスケルチレベルの検出６１２を実施させるとともに、伝送速度変更指令信号終了後の速度変更を指令するものである。伝送速度変更指令信号をうけた観測局３は、受信および送信の伝送速度を設定しうる最も遅い速度に変更する。観測局３は、個別呼出信号６１３を最も遅い伝送速度で受信６１４する。つぎに、観測局３は、個別呼出信号６１３の終了後直ちに、最も遅い伝送速度で返送信号ｄ、６１５を送出する。このようにして、監視局は、観測局３からの返送信号ｄ、６１５を正常に受信６１６することができる（○印）。
FIG. 6 shows that when the monitoring station performs a collective call, a collective call signal 600 in which a transmission speed change command signal 601 proposed in the present invention is added to the front of a conventional collective call signal (three-way transmission) 604 is transmitted. However, a state 610 in which the monitoring station cannot normally receive the signals c3 and 609 from the observation station 3 is shown (x mark). Here, the S / N of the uplink (observation station 3 → monitoring station) is lower than the circuit design value, and there is a high possibility that the monitoring station cannot receive normally.
In such a case, the present invention adds a transmission rate change command signal 611 to the front part of the individual call signal (one time) 613 directed to the observation station 3 that has not received the signal normally. The transmission speed change command signal 611 instructs the observation station 3 to start the power supply and detect the squelch level 612 and to change the speed after the transmission speed change command signal ends. Upon receiving the transmission speed change command signal, the observation station 3 changes the transmission speed of reception and transmission to the slowest speed that can be set. The observation station 3 receives 614 the individual call signal 613 at the slowest transmission rate. Next, immediately after the termination of the individual call signal 613, the observation station 3 sends the return signals d and 615 at the slowest transmission rate. In this way, the monitoring station can normally receive 616 the return signals d and 615 from the observation station 3 (circles).
図７は、監視局が一括呼出を行う際、従来の一括呼出信号（三連送）７０４の前部に、本発明で提案する伝送速度変更指令信号７０１を付加した一括呼出信号７００を送信したところ、観測局３からの返送信号を監視局が正常に受信出来なかった様子７１０を示したものである（受信入力なし、×印）。ここでは下り回線（監視局→観測局３）のＳ／Ｎが回線設計値よりも低く、観測局３で正常な受信ができない状況７０５となっており、監視局３が信号を送出しなかった可能性が高い（×印）。
このような場合、本発明では、正常に信号を受信できなかった観測局３に対する個別呼出信号（１回）７１３の前に伝送速度変更指令信号７１１を付加した呼出信号７１７送信する。伝送速度変更指令信号７１１は、観測局３に対して、電源起動とスケルチレベルの検出７１２を実施させるとともに、伝送速度変更指令信号を受信後の伝送速度の変更を指令するものである。伝送速度変更指令信号７１１をうけた観測局３は、受信および送信の伝送速度を、設定し得る最も遅い速度に変更し、個別呼出信号（１回）７１３を最も遅い伝送速度で受信７１４し、個別呼出信号（１回）７１３の終了後直ちに、最も遅い伝送速度で返送信号ｄ、７１５を送出し、電源を断とする。こうして、監視局は、観測局３からの信号ｄ、７１５を正常に受信７１６することができる（○印）。
FIG. 7 shows that when the monitoring station performs a collective call, a collective call signal 700 in which a transmission speed change command signal 701 proposed in the present invention is added to the front part of the conventional collective call signal (three consecutive transmissions) 704 is transmitted. However, a state 710 in which the monitoring station cannot normally receive the return signal from the observation station 3 (no reception input, x mark) is shown. Here, the S / N of the downlink (monitoring station → observation station 3) is lower than the circuit design value, and the observation station 3 cannot receive normally, and the monitoring station 3 did not send a signal. The possibility is high (x mark).
In such a case, according to the present invention, the call signal 717 to which the transmission rate change command signal 711 is added before the individual call signal (one time) 713 for the observation station 3 that has not been able to receive the signal normally is transmitted. The transmission speed change command signal 711 instructs the observation station 3 to start the power supply and detect the squelch level 712 and to change the transmission speed after receiving the transmission speed change command signal. The observation station 3 receiving the transmission speed change command signal 711 changes the transmission speed of reception and transmission to the slowest speed that can be set, and receives 714 the individual call signal (one time) 713 at the slowest transmission speed, Immediately after the completion of the individual call signal (once) 713, the return signals d and 715 are sent at the slowest transmission speed, and the power is turned off. In this way, the monitoring station can normally receive 716 the signals d and 715 from the observation station 3 (circles).
２０１・・・一括呼出信号（三連送）、２０２・・・電源起動・スケルチ検出、２０３・・・観測局返送信号、２０４・・・観測局１送出信号、 ２０５・・・観測局２送出信号、２０６・・・観測局３送出信号、２０７・・・監視局受信、３０１・・・一括呼出信号（三連送）、３０２・・・電源起動・スケルチ検出、３０３・・・観測局送出信号、３０４・・・観測局１送出信号、 ３０５・・・観測局２送出信号、３０６・・・観測局３送出信号、３０７・・・監視局受信、３０８・・・個別呼出信号、３０９・・・電源起動・スケルチ検出、３１０・・・観測局３送出信号、３１１・・・受信異常（観測局３）、４０１・・・一括呼出信号（三連送）、４０２・・・電源起動・スケルチ検出・観測局３受信異常、４０３・・・観測局送出信号、４０４・・・観測局１送出信号、 ４０５・・・観測局２送出信号、４０７・・・監視局受信異常（観測局３）、４０８・・・個別呼出信号、４０９・・・電源起動・スケルチ検出・観測局３受信異常、４１１・・・受信異常（観測局３）、５００・・・一括呼出信号、５０１・・・伝送速度変更指令信号、５０２・・・電源起動・スケルチ検出、５０３・・・伝送速度変更、５０４・・・一括呼出信号（三連送）、５０５・・・一括呼出信号受信、５０６・・・観測局送出信号、５０７・・・観測局１送出信号、５０８・・・観測局２送出信号、５０９・・・観測局３送出信号、５１０・・・全局正常受信、６００・・・一括呼出信号、６０１・・・伝送速度変更指令信号、６０２・・・電源起動・スケルチ検出、６０３・・・伝送速度変更、６０４・・・一括呼出信号（三連送）、６０５・・・一括呼出信号受信、６０６・・・観測局送出信号、６０７・・・観測局１送出信号、６０８・・・観測局２送出信号、６０９・・・観測局３送出信号、６１０・・・受信異常（観測局３）、６１１・・・伝送速度変更指令信号、６１２・・・電源起動・スケルチ検出、６１３・・・個別呼出信号（１回）、６１４・・・個別呼出信号受信、６１５・・・観測局３送出信号、６１６・・・正常受信（観測局３）、７０１・・・伝送速度変更指令信号、７０２・・・電源起動・スケルチ検出、７０３・・・伝送速度変更、７０４・・・一括呼出信号（三連送）、７０５・・・一括呼出信号受信・観測局３受信異常、７０６・・・観測局送出信号、７０７・・・観測局１送出信号、７０８・・・観測局２送出信号、７１０・・・受信異常（観測局３）、７１１・・・伝送速度変更指令信号、７１２・・・電源起動・スケルチ検出、７１３・・・個別呼出信号（１回）、７１４・・・個別呼出信号受信、７１５・・・観測局３送出信号、７１６・・・正常受信（観測局３）、 201: Collective paging signal (three consecutive transmissions) 202 ... Power activation / squelch detection, 203 ... Observation station return signal, 204 ... Observation station 1 transmission signal, 205 ... Observation station 2 transmission Signal: 206 ... Observation station 3 transmission signal, 207 ... Monitoring station reception, 301 ... Batch call signal (three consecutive transmissions), 302 ... Power activation / squelch detection, 303 ... Observation station transmission Signal: 304 ... Observation station 1 transmission signal, 305 ... Observation station 2 transmission signal, 306 ... Observation station 3 transmission signal, 307 ... Monitoring station reception, 308 ... Individual call signal, 309 · · Power activation · Squelch detection, 310 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Squelch detection / observation station 3 reception error, 403 ... observation station transmission Outgoing signal, 404 ... Observation station 1 transmission signal, 405 ... Observation station 2 transmission signal, 407 ... Monitoring station reception abnormality (observation station 3), 408 ... Individual call signal, 409 ... Power supply Start-up / squelch detection / observation station 3 reception error, 411 ... reception error (observation station 3), 500 ... collective call signal, 501 ... transmission speed change command signal, 502 ... power supply start-up / squelch detection 503 ... Transmission speed change, 504 ... Batch call signal (triple transmission), 505 ... Batch call signal reception, 506 ... Observation station transmission signal, 507 ... Observation station 1 transmission signal, 508 ... Observation station 2 transmission signal, 509 ... Observation station 3 transmission signal, 510 ... Normal reception of all stations, 600 ... Batch call signal, 601 ... Transmission speed change command signal, 602 ... Power activation / squelch detection, 603 ... transmission Speed change, 604 ... collective paging signal (three consecutive transmissions), 605 ... collective paging signal reception, 606 ... observation station transmission signal, 607 ... observation station 1 transmission signal, 608 ... observation station 2 transmission signal, 609 ... observation station 3 transmission signal, 610 ... reception abnormality (observation station 3), 611 ... transmission speed change command signal, 612 ... power activation / squelch detection, 613 ... Individual call signal (once), 614... Individual call signal reception, 615... Observation station 3 transmission signal, 616... Normal reception (observation station 3) 701. ... Power supply start / squelch detection, 703 ... Transmission speed change, 704 ... Batch call signal (three consecutive transmissions), 705 ... Ball call signal reception / observation station 3 reception error, 706 ... Observation Station transmission signal, 707 ... Observation station 1 transmission signal, 7 08 ... Observation station 2 transmission signal, 710 ... Reception abnormality (observation station 3), 711 ... Transmission speed change command signal, 712 ... Power activation / squelch detection, 713 ... Individual call signal ( 1 time), 714 ... Individual call signal reception, 715 ... Observation station 3 transmission signal, 716 ... Normal reception (observation station 3),
Claims (1)
一括呼出信号の最前部に、観測局の装置が設定し得る最も速い伝送速度で一括呼出信号を受信し及び観測データを送信させる制御信号を付加し、また、監視局において受信不能の観測局があった場合に、対象となる観測局に対しておこなう個別呼出信号の最前部に、当該観測局の装置が設定し得る最も遅い伝送速度で個別呼出信号を受信し及び観測データを送信させる制御信号を付加するように、監視局が観測局に対して伝送速度変更の制御を行うテレメータシステム。
In the telemetry system of the collective call control method that consists of a monitoring station and a plurality of observation stations, the monitoring station sends a collective call signal to the observation station, and each observation station sequentially transmits the observation data to the monitoring station,
At the forefront of the collective paging signal, a control signal for receiving the collective paging signal and transmitting the observation data at the fastest transmission speed that can be set by the observation station device is added. If there is, a control signal for receiving the individual call signal and transmitting the observation data at the slowest transmission speed that can be set by the device of the observation station at the forefront of the individual call signal sent to the target observation station A telemeter system in which the monitoring station controls the transmission speed change to the observation station so as to add.
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| JPH0658717B2 (en) * | 1987-11-20 | 1994-08-03 | 日本無線株式会社 | Collective call telemeter system |
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| JP2005244668A (en) * | 2004-02-26 | 2005-09-08 | Sanyo Electric Co Ltd | Communication apparatus and communication method |
| JP2008011520A (en) * | 2006-05-29 | 2008-01-17 | Kyocera Corp | Transmitter and method of controlling transmission rate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0658717B2 (en) * | 1987-11-20 | 1994-08-03 | 日本無線株式会社 | Collective call telemeter system |
| JPH11234293A (en) * | 1998-02-17 | 1999-08-27 | Sony Corp | Communication device |
| JP2001014579A (en) * | 1999-06-30 | 2001-01-19 | Toshiba Corp | Telemeter observation device and telemeter system |
| JP2001251382A (en) * | 2000-03-03 | 2001-09-14 | Hitachi Kokusai Electric Inc | Data transmission system in wireless channel |
| JP2005244668A (en) * | 2004-02-26 | 2005-09-08 | Sanyo Electric Co Ltd | Communication apparatus and communication method |
| JP2008011520A (en) * | 2006-05-29 | 2008-01-17 | Kyocera Corp | Transmitter and method of controlling transmission rate |
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