JPH0422283A - Satellite picture communication control system - Google Patents
Satellite picture communication control systemInfo
- Publication number
- JPH0422283A JPH0422283A JP12745690A JP12745690A JPH0422283A JP H0422283 A JPH0422283 A JP H0422283A JP 12745690 A JP12745690 A JP 12745690A JP 12745690 A JP12745690 A JP 12745690A JP H0422283 A JPH0422283 A JP H0422283A
- Authority
- JP
- Japan
- Prior art keywords
- information
- control circuit
- reception
- speed
- control
- 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
- 238000004891 communication Methods 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 46
- 238000012790 confirmation Methods 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 11
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、衛星を利用した画像情報の衛星通信制御方式
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a satellite communication control system for image information using a satellite.
従来の技術
従来の衛星画像通信制御方式に関し、第６図、第７図、
第８図、第９図及び第１０図を参照して説明する。第６
図は従来例を示すブロック構成図、第７図は画像情報お
よび制御情報のＨＤＬＣフレーム構成図、第８図は画像
情報および制御情報の送信単位毎に返送する受信確認情
報のＨＤＬＣフレーム構成図、第９図は受信確認情報内
容を示す図および第１０図は伝送効率低下例を示す説明
図である。Conventional technology Regarding the conventional satellite image communication control system, Figs. 6, 7,
This will be explained with reference to FIGS. 8, 9, and 10. 6th
The figure is a block configuration diagram showing a conventional example, FIG. 7 is an HDLC frame configuration diagram of image information and control information, and FIG. 8 is an HDLC frame configuration diagram of reception confirmation information returned for each transmission unit of image information and control information. FIG. 9 is a diagram showing the contents of reception confirmation information, and FIG. 10 is an explanatory diagram showing an example of a decrease in transmission efficiency.
本従来例は、衛星通信において、画像情報および制御情
報の送信制御を行う高速送信制御回路５と、画像情報お
よび制御情報を受信する高速受信制御回路６と、画像情
報および制御情報の送信単位（ＨＤＬＣフレーム単位）
毎に第８図に示す受信確認情報を送信する低速送信制御
回路８と、該受信確認情報を受信する低速受信制御回路
７とがら構成され、高速送信制御回路５から第７図に示
すＨＤ Ｌ Ｃフレーム構成で画像情報および制御情報
が送信され、高速受信制御回路６で受信される。又、受
信されるＨＤＬＣフレーム毎に第８図および第９図に示
す受信確認情報が低速送信制御回路７から送信され、低
速受信制御回路８で受信される。しかしながら、衛星回
線の遅延時間（ＩＨｏｒ約２５０ｍ５ ）および高速化
（１，５）４ｂｐｓ相当）により、高速送信制御回路５
で受信確認情報を待たずに送信可能な第７図に示すＨＤ
ＬＣフレーム数（アウトスタンディング）内に受信確認
情報の受信が低速受信制御回路８で１３個も無ければそ
の間、第１０図に示すように、高速送信制御回路５から
フラグが連送されるために、伝送効率が低下する要因と
なっていた。In satellite communication, this conventional example includes a high-speed transmission control circuit 5 that controls the transmission of image information and control information, a high-speed reception control circuit 6 that receives image information and control information, and a unit of transmission of image information and control information ( HDLC frame unit)
A low-speed transmission control circuit 8 that transmits reception confirmation information shown in FIG. Image information and control information are transmitted in a frame configuration and received by the high-speed reception control circuit 6. Further, reception confirmation information shown in FIGS. 8 and 9 is transmitted from the low-speed transmission control circuit 7 and received by the low-speed reception control circuit 8 for each received HDLC frame. However, due to the delay time of the satellite line (IHor approximately 250m5) and the high speed (1,5) equivalent to 4bps), the high-speed transmission control circuit 5
The HD shown in Figure 7 allows transmission without waiting for reception confirmation information.
If the low-speed reception control circuit 8 does not receive 13 pieces of reception confirmation information within the number of LC frames (outstanding), the flag is continuously sent from the high-speed transmission control circuit 5 as shown in FIG. , which was a factor in reducing transmission efficiency.
発明が解決しようとする課題
上述した従来の衛星画像通信制御方式は、画像情報およ
び制御情報が衛星回線の遅延時間および高速化により、
フラグ運送が発生し、伝送効率が低下する欠点があった
。Problems to be Solved by the Invention In the conventional satellite image communication control system described above, image information and control information are
This method has the disadvantage that flag transportation occurs and transmission efficiency decreases.
本発明は従来の上記実情に鑑みてなされたものであり、
従って本発明の目的は、従来の技術に内在する上記欠点
を解消し、伝送効率の高い衛星画像通信の実現を可能と
した新規な画像通信制御方式を提供することにある。The present invention has been made in view of the above-mentioned conventional situation,
Therefore, an object of the present invention is to provide a novel image communication control method that eliminates the above-mentioned drawbacks inherent in the conventional technology and makes it possible to realize satellite image communication with high transmission efficiency.
課題を解決するための手段
上記目的を達成する為に、本発明に俤る衛星画像通信制
御方式は、衛星通信において、画像情報および制御情報
の送信制御を行う高速送信制御回路１と、画像情報およ
び制御情報を受信する高速受信制御回路２と、画像情報
および制御情報の受信結果を送信する低速送信制御口＆
Ｉｒ４と、該結果を受信する低速受信制御回路３とから
構成され、高速送信制御回路１で送信する画像情報およ
び制御情報のＨＤＬＣフレーム単位で低速送信制御回路
４からの受信確認情報なしでたれ流し送信し、該単位で
連続的に高速受信制御回路２で受信するように構成され
ている。Means for Solving the Problems In order to achieve the above object, the satellite image communication control system according to the present invention includes a high-speed transmission control circuit 1 that controls the transmission of image information and control information in satellite communication, and a high-speed transmission control circuit 1 that controls the transmission of image information and control information. and a high-speed reception control circuit 2 that receives control information, and a low-speed transmission control port 2 that transmits the reception results of image information and control information.
Ir4 and a low-speed reception control circuit 3 that receives the results, and the image information and control information transmitted by the high-speed transmission control circuit 1 are transmitted in HDLC frame units without receipt confirmation information from the low-speed transmission control circuit 4. However, the high-speed reception control circuit 2 is configured to receive the data continuously in units of data.
実施例
次に本発明をその好ましい一実施例について図面を参照
しながら具体的に説明する。Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.
第１図は本発明の一実施例を示すブロック構成図、第２
図は画像情報および制御情報のＨＤＬＣフレームの構成
図、第３図は受信結果のＨＤ Ｌ Ｃフレームの構成図
、第４図は受信結果の情報内容を示す図、第５図は伝送
効率向上例を示す説明図である。FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure shows the configuration of the HDLC frame for image information and control information, Figure 3 shows the configuration of the HDLC frame of the reception result, Figure 4 shows the information content of the reception result, and Figure 5 shows an example of improving transmission efficiency. FIG.
第１図を参照するに、本発明の一実施例は、衛星通信に
おいて、画像情報および制御情報の送信制御３行う高速
送信制御回路１と、画像情報および制御情報を受信する
高速受信制御回路２と、画像情報および制御情報の受信
結果を送信する低速送信制御回路４と、該結果を受信す
る低速受信制御回路３とから構成され、高速送信制御回
路１で送信する画像情報および制御情報が第２図に示す
ＨＤＬＣフレーム構成で行われ、従来例の第８図に示す
受信確認情報なしで該ＨＤＬＣフレームをたれ流し送信
し、該ＨＤＬＣフレームを連続的に高速受信制御回路２
で受信し、第３図および第４図に示す受信結果を低速送
信制御回路４で送信し、低速受信制御回路３で受信する
。従って、画像情報および制御情報のＨＤ Ｌ Ｃフレ
ーム単位での受信確認情報を認識することなく、画像情
報および制御情報が高速送信制御回路】、から送信終了
後、低速受信制御回路３からの受信結果のみを確認する
ために、衛星遅延および高速化に影響を受けずに第５図
に示すような伝送効率の高い衛星画像通信が可能である
。Referring to FIG. 1, an embodiment of the present invention includes a high-speed transmission control circuit 1 that performs transmission control 3 of image information and control information, and a high-speed reception control circuit 2 that receives image information and control information in satellite communication. , a low-speed transmission control circuit 4 that transmits the reception results of image information and control information, and a low-speed reception control circuit 3 that receives the results. 2, the HDLC frame is continuously transmitted without reception confirmation information as shown in FIG. 8 of the conventional example, and the HDLC frame is continuously transmitted to the high-speed reception control circuit 2.
The reception results shown in FIGS. 3 and 4 are transmitted by the low-speed transmission control circuit 4 and received by the low-speed reception control circuit 3. Therefore, without recognizing the reception confirmation information in HDLC frame units of image information and control information, the image information and control information are sent from the high-speed transmission control circuit to the reception result from the low-speed reception control circuit 3 after the transmission is completed. In order to confirm only the above information, it is possible to perform satellite image communication with high transmission efficiency as shown in FIG. 5 without being affected by satellite delays and speed increases.
発明の詳細
な説明したように、本発明によれば、画像情報および制
御情報のＨＤＬＣフレーム単位での受信確認情報なしで
たれ流し送信することにより、伝送効率の高い衛星画像
通信ができる効果が得られる。As described in detail, according to the present invention, by directly transmitting image information and control information in units of HDLC frames without reception confirmation information, it is possible to achieve the effect of enabling satellite image communication with high transmission efficiency. .
第１図は本発明の一実施例を示すブロック構成図、第２
図は画像情報および制御情報のＨＤＬＣフレームの構成
図、第３図は受信結果のＨＤＬＣフレームの構成図、第
４図は受信結果の情報内容を示す図、第５図は伝送効率
向上例を示す図、第６図は従来例のブロック構成図、第
７図は画像情報および制御情報のＨＤＩ、Ｃフレーム構
成図、第８図は画像情報および制御情報の送信津位毎に
返送する受信確認情報のＭＤＩ、Ｃフレーム構成図、第
９図は受信確認情報内容を示す図、第１０図は伝送効率
低下例を示す説明図である。
１．５・・・高速送信制御回路、２．６・・・高速受信
制御回路、３．７・・・低速受信制御回路、４．８・・
・低速送信制御回路
特許出願人 日本電気株式会社
代 理 人 弁理士 熊谷雄太部
ＦＡＣＩ
第７図
ＣＳ Ｆ
第
図
し−−−−−−Ｃ−−−□−ノFIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
Figure 3 shows the configuration of an HDLC frame for image information and control information, Figure 3 shows the configuration of the HDLC frame of the reception result, Figure 4 shows the information content of the reception result, and Figure 5 shows an example of improving transmission efficiency. Figure 6 is a block diagram of the conventional example, Figure 7 is a diagram of the HDI and C frame configuration of image information and control information, and Figure 8 is reception confirmation information sent back every time image information and control information is sent. FIG. 9 is a diagram showing the contents of reception confirmation information, and FIG. 10 is an explanatory diagram showing an example of reduction in transmission efficiency. 1.5... High-speed transmission control circuit, 2.6... High-speed reception control circuit, 3.7... Low-speed reception control circuit, 4.8...
・Low-speed transmission control circuit patent applicant NEC Co., Ltd. Agent Patent attorney Yutabe Kumagai FACI Figure 7 CS F
Claims (1)
を行う高速送信制御回路と、画像情報および制御情報を
受信する高速受信制御回路と、画像情報および制御情報
の受信結果を送信する低速送信制御回路と、該受信結果
を受信する低速受信制御回路とから構成され、前記高速
送信制御回路で送信する画像情報および制御情報の送信
単位（ＨＤＬＣ；ＨｉｇｈＬｅｖｅｌＤａｔａＬｉｎｋ
Ｃｏｎｔｒｏｌフレーム単位）での前記低速送信制御回
路からの受信確認情報なしで放送型送信し、前記高速受
信制御回路で画像情報および制御情報を連続的に受信で
き、かつ受信結果のみを前記低速送信制御回路で返送す
ることにより、制限なく前記高速受信制御回路と接続で
きることを特徴とする衛星画像通信制御方式。In satellite communication, a high-speed transmission control circuit that controls the transmission of image information and control information, a high-speed reception control circuit that receives image information and control information, and a low-speed transmission control circuit that transmits the reception results of image information and control information. , a low-speed reception control circuit that receives the reception result, and a transmission unit (HDLC; High Level Data Link) of image information and control information transmitted by the high-speed transmission control circuit.
broadcast-type transmission without receiving confirmation information from the low-speed transmission control circuit (in control frame units), image information and control information can be continuously received by the high-speed reception control circuit, and only the reception results are sent to the low-speed transmission control circuit. A satellite image communication control system characterized in that it can be connected to the high-speed reception control circuit without restriction by sending back data through a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12745690A JPH0422283A (en) | 1990-05-16 | 1990-05-16 | Satellite picture communication control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12745690A JPH0422283A (en) | 1990-05-16 | 1990-05-16 | Satellite picture communication control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0422283A true JPH0422283A (en) | 1992-01-27 |
Family
ID=14960382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12745690A Pending JPH0422283A (en) | 1990-05-16 | 1990-05-16 | Satellite picture communication control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0422283A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456734A (en) * | 1993-05-07 | 1995-10-10 | Fuji Photo Film Co., Ltd. | Abrasive member |
-
1990
- 1990-05-16 JP JP12745690A patent/JPH0422283A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456734A (en) * | 1993-05-07 | 1995-10-10 | Fuji Photo Film Co., Ltd. | Abrasive member |
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