JPH01146435A - Control system for satellite communication demand assign multiple access - Google Patents

Control system for satellite communication demand assign multiple access

Info

Publication number
JPH01146435A
JPH01146435A JP30320287A JP30320287A JPH01146435A JP H01146435 A JPH01146435 A JP H01146435A JP 30320287 A JP30320287 A JP 30320287A JP 30320287 A JP30320287 A JP 30320287A JP H01146435 A JPH01146435 A JP H01146435A
Authority
JP
Japan
Prior art keywords
earth station
bit rate
multiple access
demodulator
modulator
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
Application number
JP30320287A
Other languages
Japanese (ja)
Inventor
Hiroki Takamoto
高本　浩樹
Takeshi Hayasaka
早坂　赳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP30320287A priority Critical patent/JPH01146435A/en
Publication of JPH01146435A publication Critical patent/JPH01146435A/en
Pending legal-status Critical Current

Links

Landscapes

  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To transmit and receive a signal of other bit rate as well as a 64kbps signal by providing a variable bit rate modulator-demodulator to each earth station and using a multiple access controller to control the operating frequency band and the bit rate of an opposite modulator-demodulator based on the request from each earth station. CONSTITUTION:Plural earth stations 11-1n are provided respectively with a variable bit rate modulator-demodulator 4i. The earth station 1i among the earth stations 11-1n (n is a positive integer), for example, is connected to other earth station 11 via a satellite 2. A signal sent from a ground network is given from a signal input terminal 7i, demodulated by a modulator-demodulator 4i, frequency-converted and amplified by a transmitter-receiver 3i and outputted to the satellite 2 in a frequency fT'. The demand assign multiple access controller 5 instructs the operating frequency and the bit rate by providing the connection request of each earth station 1 to a relevant earth station 1i. A control signal from the said controller 5 is given to the modulator-demodulator 4i via a control signal input terminal 6i of the earth station 1i to set the operating frequency and the bit rate to a required value.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は衛星通信におけるデマンドアサイン多元接続制
御方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a demand assignment multiple access control system in satellite communications.

〔従来の技術〕[Conventional technology]

この種の接続制御方式としては、インテルサノトが提供
しているス被−ド（５ＰＡＤＥ　）で使われているデマ
ンドアサイン多元接続制御方式がある。An example of this type of connection control method is the demand assignment multiple access control method used in the network (5PADE) provided by Intel SANOTO.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかし、上述したデマンドアサイン多元接続制御方式は
、単に使用周波数帯を制御するだけであＦ）　、　６４
　ｋｂｐｓ等のあるきまったビットレートしか伝送でき
ないという欠点があった。However, the demand assignment multiple access control method described above simply controls the frequency band used.
It has the disadvantage that it can only transmit at a certain bit rate such as kbps.

〔問題点を解決するだめの手段〕[Failure to solve the problem]

本発明のデマンドアサイン多元接続制御方式は。 The demand assignment multiple access control method of the present invention is as follows.

各地球局に可変ビットレート変復調器２備えることでこ
の可変ビットレート変復調器のビットレートと地球局と
衛星間で使用する周波数帯とを同時に制御できる回線制
御機能を有することを特徴としている。Each earth station is equipped with a variable bit rate modulator/demodulator 2, thereby providing a line control function that can simultaneously control the bit rate of the variable bit rate modulator/demodulator and the frequency band used between the earth station and the satellite.

〔実施例〕〔Example〕

次に１本発明について図面を参照して説明する。 Next, one embodiment of the present invention will be explained with reference to the drawings.

第１図は本発明を概略的に示すブロック図である。複数
の地球局１１〜Ｉｎはそれぞれ可変ビットレート変復調
器（ここでは、４１のみを図示している）全備えている
。地球局１１〜Ｉｎ（ｎは正の整数）のうち１例えば地
球局１、は、衛星２を介し他の地球局１１と接続される
。地上網から送られてきた信号は信号入力端子７ｉから
入力され、可変ピットレート変復調器４□にて変調され
、更に送受信装置３゜にて周波数変換及び増幅されて衛
星２へ周波数ｆＴ′で出力される。デマンドアサイン多
元接続制御装置５は、各地球局１の接続要求に基づき使
用周波数とピットレートとを関連した地球局、ここでは
地球局１ｉへ指示する。デマンドアサイン多元接続制御
装置５からの制御信号は、地球局１ｉの制御信号入力端
子６ｉを介して可変ピットレート変復調器４ｉへ入力さ
れ、使用周波数とピットレートとが所要の値にセットさ
れる。FIG. 1 is a block diagram schematically illustrating the present invention. Each of the plurality of earth stations 11 to In is fully equipped with a variable bit rate modulator/demodulator (only 41 is shown here). One of the earth stations 11 to In (n is a positive integer), for example, earth station 1, is connected to another earth station 11 via a satellite 2. The signal sent from the terrestrial network is input from the signal input terminal 7i, modulated by the variable pit rate modulator 4□, further frequency-converted and amplified by the transmitter/receiver 3°, and output to the satellite 2 at the frequency fT'. be done. The demand assignment multiple access control device 5 instructs the frequency to be used and the pit rate based on the connection request from each earth station 1 to the associated earth station, here, the earth station 1i. The control signal from the demand assignment multiple access control device 5 is input to the variable pit rate modulator/demodulator 4i via the control signal input terminal 6i of the earth station 1i, and the frequency to be used and the pit rate are set to required values.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、地球局に備えられた可変
ピットレート変復調器をデマンドアサイン多元接続制御
装置により、衛星に必要な時だけアクセスし衛星を有効
利用することができるので。As explained above, according to the present invention, the variable pit rate modulator/demodulator provided in the earth station is accessed to the satellite only when necessary by using the demand assignment multiple access control device, thereby making it possible to effectively utilize the satellite.

６４　ｋｂｐｉの信号のみならず他のピットレート、例
、ｔ　Ｉｄ　ｆレコン７アレンス用信号（３８４ｋｂｐ
ｓ　）の信号も送受でき、システムがよシ柔軟にできる
効果がある。Not only the 64 kbpi signal but also other pit rates, such as the t Id f Recon 7 arrangement signal (384 kbp
s) signals can also be sent and received, which has the effect of making the system more flexible.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の制御方式全概略的に示すブロック図で
ある。 １１〜１ｎ・・・地球局、２・・・衛星、３．・・・送
受信装置。 ４、・・・可変ビットレート変復調器、５・・・デマン
ドアサイン多元接続制御装置ｍ　６ｉ・・・制御信号入
力端子。 ７１・・・信号入力端子。FIG. 1 is a block diagram schematically showing the entire control system of the present invention. 11-1n...Earth station, 2...Satellite, 3. ...Transmitting/receiving device. 4...Variable bit rate modulator/demodulator, 5...Demand assignment multiple access control device m 6i...Control signal input terminal. 71...Signal input terminal.

Claims (1)

【特許請求の範囲】[Claims] １、周波数分割多元接続方式を用いる衛星通信システム
において、各地球局は可変ビットレート変復調器を備え
、多元接続制御装置は各地球局からの要求に基づき、使
用周波数帯と、対向する変復調器のビットレートを制御
する事を特徴とした衛星通信デマンドアサイン多元接続
制御方式。1. In a satellite communication system using frequency division multiple access, each earth station is equipped with a variable bit rate modulator and demodulator, and the multiple access control device determines the frequency band to be used and the frequency of the opposite modulator based on requests from each earth station. A satellite communication demand assignment multiple access control method characterized by bit rate control.
JP30320287A 1987-12-02 1987-12-02 Control system for satellite communication demand assign multiple access Pending JPH01146435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30320287A JPH01146435A (en) 1987-12-02 1987-12-02 Control system for satellite communication demand assign multiple access

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30320287A JPH01146435A (en) 1987-12-02 1987-12-02 Control system for satellite communication demand assign multiple access

Publications (1)

Publication Number Publication Date
JPH01146435A true JPH01146435A (en) 1989-06-08

Family

ID=17918112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30320287A Pending JPH01146435A (en) 1987-12-02 1987-12-02 Control system for satellite communication demand assign multiple access

Country Status (1)

Country Link
JP (1) JPH01146435A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998018213A3 (en) * 1996-10-25 1998-06-11 Ericsson Inc Dual mode symmetric/asymmetric communication control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998018213A3 (en) * 1996-10-25 1998-06-11 Ericsson Inc Dual mode symmetric/asymmetric communication control system
US5914942A (en) * 1996-10-25 1999-06-22 Ericsson Inc. Satellite communications system with dual mode bandwidth control

Similar Documents

Publication Publication Date Title
US4578815A (en) Wide area coverage radio communication system and method
AU612754B2 (en) Demand-assignment multiple access control system
US5392283A (en) Data communication protocol
JPH01146435A (en) Control system for satellite communication demand assign multiple access
US4002982A (en) Mixed analog/digital transmission system using radio link and method of operating same
JP2611318B2 (en) Digital satellite communication system
JPS60167533A (en) Hybrid satellite communication system
JPH0235848A (en) Modulating method switching transmission system
JPS61152141A (en) Radio station monitor system
JP2812092B2 (en) Time division multiple access wireless device
JP2797574B2 (en) Data wireless communication system
JP3174025B2 (en) Method for establishing a connection in a satellite system and a satellite system suitable for implementing the method
JPH02253734A (en) Time-division multiple transmission system
JPH04103237A (en) Data transmission system
JPH0666724B2 (en) Wireless communication method
JPH02104131A (en) Transmitter
JPS58143635A (en) Transmission power controlling system of satellite communication
JPS5934734A (en) Circuit monitor system for fm-fdma satellite communication system
JP2817431B2 (en) Satellite communication earth station equipment
JPH04172829A (en) Dama communication system
JPH0365060B2 (en)
JPH0761037B2 (en) Frequency division multiple access satellite communication method
JPH05347580A (en) Mobile communication system
JPS6226623B2 (en)
JPH1118178A (en) Signal processing system using wired remote controller terminal