JPS61245638A - Satellite communication system - Google Patents
Satellite communication systemInfo
- Publication number
- JPS61245638A JPS61245638A JP60086340A JP8634085A JPS61245638A JP S61245638 A JPS61245638 A JP S61245638A JP 60086340 A JP60086340 A JP 60086340A JP 8634085 A JP8634085 A JP 8634085A JP S61245638 A JPS61245638 A JP S61245638A
- Authority
- JP
- Japan
- Prior art keywords
- communication
- protocol
- information
- data
- transmission
- 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
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- Detection And Prevention Of Errors In Transmission (AREA)
- Communication Control (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、衛星通信方式に係り、特に複数の通信プロト
コルを最適に切替えることにより、衛星通信の効率を最
大にする衛星通信方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a satellite communication system, and particularly to a satellite communication system that maximizes the efficiency of satellite communication by optimally switching between a plurality of communication protocols.
現在、例えば文献（高橋他、［Ｃ８利用コンピュータ・
ネットワーク実験システム１．システムの概要」電波研
季報、Ｖｏｌ ２８．Ａｌ４５．８２）に示されるよう
な方式がある。衛星を使った通信方式の実験が実施中で
ある。この方式は、衛星通信に適した通信プロトコルの
選定を自相したものであるが、衛星通信は、遅延や同報
性、完全結合性など特殊性があるため、データサイズ、
伝送速度。Currently, for example, literature (Takahashi et al., [C8-based computer
Network experiment system 1. “System Overview” Radio Research Quarterly, Vol. 28. There is a method as shown in Al45.82). Experiments are underway on a communication system using satellites. This method aims to select a communication protocol suitable for satellite communication, but because satellite communication has special characteristics such as delay, broadcasting characteristics, and complete connectivity, data size,
Transmission speed.
通信形態など種々のファクタによね、ひとつのプロトコ
ルですべてをまかなう事は出来ないとの見方が一般であ
る。It is generally believed that one protocol cannot cover everything, depending on various factors such as the communication format.
本発明の目的は、前記背景のＦに衛星通信の外、一部情
報（降雨量１食など、内部情報（ＢＥｆ’Ｌ：ピットエ
ラー率、伝送データサイズ、速度等）−ヲもとにして、
その時の通信効率を最大にする通信プロトコルを選択し
て通信を行う衛星通信方式を提供することにある。The purpose of the present invention is to add some information (such as rainfall per eclipse, internal information (BEf'L: pit error rate, transmission data size, speed, etc.)) to the above-mentioned background F in addition to satellite communication. ,
An object of the present invention is to provide a satellite communication system that performs communication by selecting a communication protocol that maximizes communication efficiency at that time.
上記目的を達成するために本発明では、データ収集装置
を設け、このデータ収集装置で雨量やＢ Ｅ Ｒ，デー
タサイズなどの各種データを集めて、通信状態監視装置
で監視を行い、通信プロトコル切替装置を設は上記監視
装置からの指令によりその時の通信状態に最適の通信プ
ロトコルを選択するように構成したものである。In order to achieve the above object, the present invention provides a data collection device that collects various data such as rainfall, BER, data size, etc., monitors it with a communication status monitoring device, and switches communication protocols. The apparatus is configured to select the communication protocol most suitable for the communication state at that time in response to commands from the monitoring apparatus.
以下、本発明の一実施例を第１図により説明する。これ
は、本発明による衛星通信方式を実行する装置の一実施
例の構成図である。An embodiment of the present invention will be described below with reference to FIG. This is a configuration diagram of an embodiment of a device for implementing a satellite communication system according to the present invention.
１０１は衛星通信アンテナ、１０２は変調器、１０３は
復調器、１０４は送受信装置、１０５は伝送制御装置で
ある。伝送制御装置１０５は、通信制御族＃１１０から
の送信データを受けて送受信装置１０４へ送り、あるい
は１０４からの受信データを受けて１１０ヘデータを渡
す。１１２は送受信データを格納する記憶メモリーであ
る。以上が通常の衛星通信装置の構成である。101 is a satellite communication antenna, 102 is a modulator, 103 is a demodulator, 104 is a transmitting/receiving device, and 105 is a transmission control device. Transmission control device 105 receives transmission data from communication control group #110 and sends it to transmission/reception device 104, or receives reception data from communication control group #110 and passes the data to 110. 112 is a storage memory that stores transmitted and received data. The above is the configuration of a normal satellite communication device.
以上の装置にさらに、雨量計などの外部情報計測装置１
０６からの外部情報、伝送制御装置１０５からの送受信
データの情報を集めるデータ収集装置１０７、および、
通信状態監視装置１０９、プロトコル切替装置１１１、
プロトコル格納器１１３を加える。In addition to the above devices, an external information measuring device such as a rain gauge 1
A data collection device 107 that collects external information from 06, information on transmitted and received data from the transmission control device 105, and
Communication status monitoring device 109, protocol switching device 111,
Add protocol storage 113.
いま、通信制御装置１１０、伝送制御装置１０５、送受
信装置１０４、変調器１０２、仮調器１０３、アンテナ
１０１で、衛星を介して他の地球局と通信しているとす
る。このとき、データ情報収集装置１０７は、伝送制御
装置１０５からの送受信データの情報、例えば送信デー
タサイズ、転送速度。Assume that the communication control device 110, transmission control device 105, transmitting/receiving device 104, modulator 102, temporary modulator 103, and antenna 101 are communicating with another earth station via a satellite. At this time, the data information collection device 107 collects information on the transmitted and received data from the transmission control device 105, such as transmission data size and transfer rate.
回報通信や対話通信などの通信形態などを受ける。Receive forms of communication such as circular communication and dialogue communication.
また、外部情報計測装置１０６からは、通信のビットエ
ラー率を大きく左右する雨量の測定値などの情報を受け
る。これら゛情報を解読してプロトコル切替通信制御装
置１０８の中の通信状態監視装置１０９に信号を送る。Further, from the external information measuring device 106, information such as a measured value of rainfall, which greatly influences the bit error rate of communication, is received. This information is decoded and a signal is sent to the communication status monitoring device 109 in the protocol switching communication control device 108.
プロトコル切替装置１１１は通信状態監視装置１０９か
らの命令により、プロトコル格納装置１１３からプロト
コルを取り出し通信制御装置１１０に最適のプロトコル
をプログラム、あるいは通信制御パラメータ（例えば、
ウィンドウサイズ、モジュロ、エラーチェックフラグ等
）を変更する様に指令を送る。この様にして、現在の通
信状態に最適な衛星通信プロトコルを選択し他の地球局
と通信を行う。In response to a command from the communication status monitoring device 109, the protocol switching device 111 retrieves the protocol from the protocol storage device 113, programs the optimal protocol for the communication control device 110, or uses communication control parameters (for example,
Send commands to change window size, modulo, error checking flag, etc.). In this way, the optimum satellite communication protocol for the current communication state is selected to communicate with other earth stations.
通信プロトコルを切替える方法としては、プロトコルそ
のものをプログラム全体として入れかえる。あるいは必
要なプロトコルをボード上に実現し、ボードを切替える
方法がとれる。「欧米各国における衛星通信用コンピュ
ータ・コミュニケーション・プロトコル（ＣＳ −ＣＣ
ＮＰ ）の現状−欧米調査報告書−」、（財）日本デー
タ通信教会、８５９、３ の報告にあるように、高速
のデータ伝送（５６Ｋｂｐｓ〜ａ、ａＫｂｐｓ）にはＨ
ＤＬＣの（Ｃｏｎｔｉｎｕｏｕｓ ）モードを、低速デ
ータ伝送用としてＢＳＣプロトコルを用いて効率を上げ
ることが可能である。A method for switching communication protocols is to replace the protocols themselves as a whole program. Alternatively, you can implement the necessary protocols on the board and switch between boards. “Computer Communication Protocol (CS-CC) for Satellite Communications in Western Countries
As reported in ``The Current Situation of NP (European and American Survey Report)'', Japan Data Communication Church, 859, 3, high-speed data transmission (56Kbps ~ a, aKbps) requires
The DLC (Continuous) mode can be made more efficient by using the BSC protocol for low-speed data transmission.
また、通信プロトコルの制御パラメータを変えるきっか
けとして、第２図に示すように、ピットエラー率（ＢＥ
Ｒ）は、モジュロを拡大すると５６Ｋｂｐ８以下では効
率が改善される。モジュロが小さい場合は低速チャネル
を複数用いる。雨量が増加してＢＥＲが増したときは、
エラー回復を緩和する。以上の様にパラメータを変更す
ることによりプロトコルの切替を実現する。In addition, as a trigger for changing the control parameters of the communication protocol, the pit error rate (BE) is
R), the efficiency is improved below 56 Kbp8 by expanding the modulo. If the modulo is small, multiple low-speed channels are used. When the rainfall increases and the BER increases,
Mitigating error recovery. Protocol switching is realized by changing the parameters as described above.
本発明によれば、衛星通信のプロトコルを、雨量１食な
どの外部要因１通信データのサイズ、伝送速度などの内
部要因により、モジュロ、ウィンドウサイズなど通信制
御パラメータを変えたり、あるいはプロトコル全体を切
替えることによってその時々の最適な通信プロトコルを
用いて衛星通信の効率を維持出来る。According to the present invention, communication control parameters such as modulo and window size can be changed in the satellite communication protocol depending on external factors such as rainfall, internal factors such as communication data size and transmission speed, or the entire protocol can be switched. This allows the efficiency of satellite communication to be maintained using the most appropriate communication protocol at the time.
従来、ひとつのプロトコルのみを実現出来るシステムで
は、プロトコルの変更に対し、システム全体をジェネレ
ーションし直す必要があったが、本発明ではこれらが簡
略化できる。Conventionally, in a system that could implement only one protocol, it was necessary to regenerate the entire system in response to a change in protocol, but the present invention can simplify this process.
第１図は、本発明による衛星通信方式の一実施例の構成
図、第２図は、伝送速度とＢＥＲ，モジュロの関係図で
ある。
１０１・・・衛星通信アンテナ、１０２・・・変調器、
１０３・・・復調器、１０４・・送受信装置、１ｏ５・
・・伝送制御装置、１０６・・・外部情報計測装置、１
０７・・・データ収集装置、１０８・・・プロトコ”ル
切替通信制呻装置、１０９・・・通信状態監視装置、１
１０・・・通信制御装置、１１１・・・プロトコル切替
装置、１１２・・・データ記憶器、１１３・・・プロト
コル格納器。FIG. 1 is a block diagram of an embodiment of a satellite communication system according to the present invention, and FIG. 2 is a diagram showing the relationship between transmission speed, BER, and modulo. 101... Satellite communication antenna, 102... Modulator,
103... Demodulator, 104... Transmitting/receiving device, 1o5...
...Transmission control device, 106...External information measurement device, 1
07... Data collection device, 108... Protocol switching communication control device, 109... Communication status monitoring device, 1
DESCRIPTION OF SYMBOLS 10... Communication control device, 111... Protocol switching device, 112... Data storage device, 113... Protocol storage device.
Claims (1)
制御装置と記憶装置より成る衛星通信地球局設備におい
て、外部情報計測装置と外部情報内部通信情報を集める
データ収集装置と通信状態監視装置と通信プロトコル格
納装置と通信プロトコル切替装置と、上記データ収集装
置により集めた情報を上記通信状態監視装置が監視を続
けてその時の最適通信プロトコル、あるいは最適通信制
御パラメータを切替える装置とを具備して構成されたこ
とを特徴とする衛星通信方式。In satellite communication earth station equipment consisting of an antenna, modem, transmitting/receiving device, transmission control device, communication control device, and storage device, an external information measuring device, a data collection device that collects external information and internal communication information, a communication status monitoring device, and a communication protocol. It is configured to include a storage device, a communication protocol switching device, and a device that allows the communication status monitoring device to continuously monitor the information collected by the data collection device and switch the optimal communication protocol or optimal communication control parameters at that time. A satellite communication system characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60086340A JPS61245638A (en) | 1985-04-24 | 1985-04-24 | Satellite communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60086340A JPS61245638A (en) | 1985-04-24 | 1985-04-24 | Satellite communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61245638A true JPS61245638A (en) | 1986-10-31 |
Family
ID=13884120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60086340A Pending JPS61245638A (en) | 1985-04-24 | 1985-04-24 | Satellite communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61245638A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63194448A (en) * | 1987-02-09 | 1988-08-11 | Fujitsu Ltd | Rate sequence setting system |
| EP0856966A2 (en) * | 1997-01-29 | 1998-08-05 | D.D.Network Limited | Apparatus and method for data distribution with transmission confirmation |
| JP2005204078A (en) * | 2004-01-15 | 2005-07-28 | Sony Ericsson Mobilecommunications Japan Inc | Method and device for transmission |
| US7149807B1 (en) * | 2001-02-02 | 2006-12-12 | Akamai Technologies, Inc. | Control and communication infrastructure (CCI) for selecting a transport mechanism to transport data to one or more servers in a content delivery network based on the size of the data, together with frequency and loss tolerance with respect to transport of the data |
| US8000343B1 (en) | 1999-08-18 | 2011-08-16 | Fujitsu, Limited | Communication device, and method of communication between communication devices and medium thereof |
-
1985
- 1985-04-24 JP JP60086340A patent/JPS61245638A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63194448A (en) * | 1987-02-09 | 1988-08-11 | Fujitsu Ltd | Rate sequence setting system |
| JPH0521462B2 (en) * | 1987-02-09 | 1993-03-24 | Fujitsu Ltd | |
| EP0856966A2 (en) * | 1997-01-29 | 1998-08-05 | D.D.Network Limited | Apparatus and method for data distribution with transmission confirmation |
| EP0856966A3 (en) * | 1997-01-29 | 2000-09-27 | D.D.Network Limited | Apparatus and method for data distribution with transmission confirmation |
| US6212166B1 (en) | 1997-01-29 | 2001-04-03 | D.D.Network Limited | Data distribution method and data distribution apparatus |
| US8000343B1 (en) | 1999-08-18 | 2011-08-16 | Fujitsu, Limited | Communication device, and method of communication between communication devices and medium thereof |
| US7149807B1 (en) * | 2001-02-02 | 2006-12-12 | Akamai Technologies, Inc. | Control and communication infrastructure (CCI) for selecting a transport mechanism to transport data to one or more servers in a content delivery network based on the size of the data, together with frequency and loss tolerance with respect to transport of the data |
| JP2005204078A (en) * | 2004-01-15 | 2005-07-28 | Sony Ericsson Mobilecommunications Japan Inc | Method and device for transmission |
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