JP2001007751A - Satellite communication system - Google Patents

Satellite communication system

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Publication number
JP2001007751A
JP2001007751A JP17333299A JP17333299A JP2001007751A JP 2001007751 A JP2001007751 A JP 2001007751A JP 17333299 A JP17333299 A JP 17333299A JP 17333299 A JP17333299 A JP 17333299A JP 2001007751 A JP2001007751 A JP 2001007751A
Authority
JP
Japan
Prior art keywords
csc
inbound
channel
signal
communication
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
JP17333299A
Other languages
Japanese (ja)
Inventor
Tomoyuki Oi
智之 大井
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 JP17333299A priority Critical patent/JP2001007751A/en
Publication of JP2001007751A publication Critical patent/JP2001007751A/en
Pending legal-status Critical Current

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  • Telephonic Communication Services (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

PROBLEM TO BE SOLVED: To control congestion of a CSC inbound signal and to improve the transmission efficiency of the CSC inbound signal of a network on a slave station side by regulating a connection request, so that it is not given when the detection rate of the CSC inbound signal is not less than a prescribed value by mans of a communication channel. SOLUTION: Respective slave stations 2 and 3 receive CSC inbound carriers 8 from a master station 1 by using a communication card in a standby state among communication cards 13, 14, etc., and 16, 17, etc. The number of detection times on the CSC inbound signals of all slave stations 2 and 3, which the respective slave stations 2 and 3 transmit, for one second from it is calculated as a detection rate. When the detection rate is larger than a prescribed value, a satellite line is decided to be jammed and a communication request is regulated so as to be not spontaneously given to a CSC-only channel in a communication channel. The CSC inbound signal from the CSC-only channel is regulated so as not to be transmitted by the CSC signal transmission/reception-only cards 12 and 15.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、衛星通信回線を使
用したデマンドアサインメント多元接続の衛星通信方式
に関する。
The present invention relates to a demand assignment multiple access satellite communication system using a satellite communication line.

【0002】[0002]

【従来の技術】従来のデマンドアサインメント多元接続
(以下、「DAMA」という。)衛星通信方式では、各
子局は親局に対しCSC(Common Signal
ingChannel)インバウンド信号を送出して回
線接続要求等を行い、親局はCSCアウトバウンド信号
により回線制御及び管理を行う。したがって、子局数、
子局の通信用チャンネル数及び通信要求数等が増え、子
局毎のCSCインバウンド信号が増加すると、各子局か
ら親局に対するCSCインバウンド信号が混み合い、子
局がさらに接続要求のCSCインバウンド信号を送出す
ると、衛星回線のCSCインバウンド回線が一層混み合
い、回線接続制御がスムーズに行えなくなる。また、各
子局がCSCインバウンド信号の混み具合に関係なく接
続要求を衛星回線に送出すると、インバウンド周波数で
のCSCバースト信号の衝突確率が増加し、衝突した複
数のインバウンド信号は親局で受信できなくなるから衛
星回線の利用効率が低下する。
2. Description of the Related Art In a conventional demand assignment multiple access (hereinafter referred to as "DAMA") satellite communication system, each slave station sends a CSC (Common Signal) signal to a master station.
ingChannel) sends out an inbound signal to make a line connection request and the like, and the master station controls and manages the line with the CSC outbound signal. Therefore, the number of slave stations,
When the number of communication channels and the number of communication requests of the slave stations increase and the number of CSC inbound signals for each slave station increases, the CSC inbound signals from the respective slave stations to the master station are crowded, and the slave station further increases the connection request CSC inbound signal. Is transmitted, the CSC inbound line of the satellite line becomes more crowded, and line connection control cannot be performed smoothly. Also, when each slave station sends a connection request to the satellite line regardless of the degree of congestion of the CSC inbound signal, the collision probability of the CSC burst signal at the inbound frequency increases, and a plurality of colliding inbound signals can be received by the master station. Since it disappears, the use efficiency of the satellite link decreases.

【0003】これに対処する技術として、親局が衛星回
線の使用効率を監視し、衛星回線の使用効率があらかじ
め定められた一定値を超えたとき、親局から子局に向け
て発信規制情報をトーキーにより送出し、子局はトーキ
ー等の設備により端末からの発信規制を行うようにした
方式が知られている。このような子局側の設備を有する
システムは、例えば、特開平4−098909号公報に
記載されている。
As a technique for coping with this, the master station monitors the use efficiency of the satellite link, and when the use efficiency of the satellite link exceeds a predetermined value, transmission control information is transmitted from the master station to the slave station. Is transmitted by a talkie, and a slave station controls transmission from a terminal using equipment such as a talkie. A system having such facilities on the slave station side is described in, for example, Japanese Patent Application Laid-Open No. 4-09909.

【0004】図2は、このDAMA衛星通信方式を示す
図である。通信衛星25と、親局としての中心局DAM
A制御装置21と、子局としての地球局DAMA制御装
置26a、26bとから構成される。そして、中心局D
AMA制御装置21は、CSC送受信制御回路22、ト
ーキー送信回路23及び無線系装置24を備える。ま
た、地球局DAMA制御装置26a、26bは、それぞ
れCSC信号の送受信制御回路27a、27b及び通話
信号送受信回路28a、28b及び無線系装置30a、
30bを備え、更に、それぞれ端末装置(トーキー用装
置)29a、29bを備える。
FIG. 2 is a diagram showing the DAMA satellite communication system. Communication satellite 25 and central station DAM as master station
A control device 21 and earth station DAMA control devices 26a and 26b as slave stations. And the central station D
The AMA control device 21 includes a CSC transmission / reception control circuit 22, a talkie transmission circuit 23, and a wireless device 24. The earth station DAMA control devices 26a and 26b respectively include a CSC signal transmission / reception control circuit 27a, 27b, a call signal transmission / reception circuit 28a, 28b, and a radio system device 30a,
30b, and further include terminal devices (devices for talkie) 29a and 29b, respectively.

【0005】[0005]

【発明が解決しようとする課題】DAMA衛星通信方式
では、CSCインバウンド信号の伝送効率を改善し、回
線接続制御を円滑化することが重要であるが、従来のD
AMA衛星通信方式では、CSCアウトバウンド信号に
より親局から発信規制情報を子局に送信し、子局は前記
発信規制情報を受信し端末に対して規制がかかったこと
を知らせるように構成しており、このような規制方式に
おいては、親局及び子局間の規制信号の送受信が増える
のみならず、親局は規制信号送出用のトーキー等の設備
が必要になり、子局側は同様にトーキー等の設備を設け
ることが必要になるから設備規模が拡大しコストが増加
するという問題があった。
In the DAMA satellite communication system, it is important to improve the transmission efficiency of the CSC inbound signal and smooth the line connection control.
In the AMA satellite communication system, transmission restriction information is transmitted from a master station to a slave station by a CSC outbound signal, and the slave station receives the transmission restriction information and notifies the terminal that the restriction has been applied. In such a regulation system, not only the transmission and reception of the regulation signal between the master station and the slave station increases, but also the master station requires equipment such as a talkie for transmitting the regulation signal. Since it is necessary to provide such equipment, there is a problem that the equipment scale is increased and the cost is increased.

【0006】(発明の目的)本発明の目的は、子局側で
CSCインバウンド信号の輻輳制御を行い、ネットワー
クのCSCインバウンド信号の伝送効率を向上させるこ
とにある。
(Object of the Invention) It is an object of the present invention to control the congestion of a CSC inbound signal on the slave station side to improve the transmission efficiency of the CSC inbound signal in a network.

【0007】本発明の他の目的は、子局側でCSCイン
バウンド信号の送出を規制することにより、回線接続制
御を円滑化することにある。
Another object of the present invention is to smooth out line connection control by regulating the transmission of CSC inbound signals on the slave station side.

【0008】本発明の他の目的は、子局、親局間に余計
な規制信号の送受信及びそのための設備を付加すること
なく、ネットワークのCSCインバウンド信号の伝送効
率を向上させることにある。
Another object of the present invention is to improve the transmission efficiency of a CSC inbound signal in a network without transmitting / receiving an unnecessary regulation signal between a slave station and a master station, and without adding any equipment for the purpose.

【0009】[0009]

【課題を解決するための手段】本発明は、共通制御信号
(Common Signaling Channel:CSC信号)の送受信専
用のチャンネルを有し、そのチャンネルから通信回線割
り当て制御される通信用チャンネルが多チャンネル実装
された、回線要求に応じた多元接続通信装置おいて、通
信用チャンネルが通信を行わないときは、各々の通信用
チャンネルでCSCインバウンドキャリアを受信し、そ
こからCSCインバウンド信号を検出する。その検出信
号の検出率を計算する機能と、通信用チャンネルが発呼
等他のチャンネルと接続要求する際に、先に計算した検
出率をもとに一定の検出率未満、つまり、CSCインバ
ウンド信号が比較的空いているときは接続要求送信を許
可し、一定の検出率以上、つまり、混み合っている場合
には接続要求をさせないよう各通信用チャンネルで規制
をかけることを特徴とする。
According to the present invention, there is provided a channel dedicated to transmission and reception of a common control signal (Common Signaling Channel: CSC signal), and a multi-channel communication channel controlled by communication channel allocation from the channel. Further, in the multiple access communication device according to the line request, when the communication channel does not perform communication, the CSC inbound carrier is received in each communication channel, and the CSC inbound signal is detected therefrom. A function for calculating the detection rate of the detection signal, and when the communication channel requests connection to another channel such as a call, the detection rate is less than a predetermined detection rate based on the detection rate calculated in advance, that is, the CSC inbound signal. When is relatively vacant, transmission of a connection request is permitted, and when communication is over a certain detection rate, that is, when it is congested, restrictions are imposed on each communication channel so as not to make a connection request.

【0010】また、本発明は、上記多元接続通信装置に
おいて、CSC送受信専用のチャンネルで規制をかける
ことを特徴とする。
Further, the present invention is characterized in that in the above multiple access communication device, a restriction is made on a channel dedicated to CSC transmission / reception.

【0011】(作用)子局の通信用チャンネルにおい
て、通信を行わないときにCSCインバウンドキャリア
を受信して、CSCインバウンド回線の混み具合を監視
し、CSCインバウンド回線が所定の混み具合を超えた
ら、当該通信用チャンネルからの発呼が行われないよう
に子局の通信用チャンネルで規制する。また、同様にC
SC送受信専用チャンネルからのCSC信号の送信を規
制し、CSCインバウンド回線の混雑を回避する。
(Operation) In the communication channel of the slave station, when communication is not performed, a CSC inbound carrier is received, the degree of congestion of the CSC inbound line is monitored, and when the CSC inbound line exceeds a predetermined degree of congestion, Restrictions are made on the communication channel of the slave station so that calls from the communication channel are not made. Similarly, C
The transmission of the CSC signal from the SC transmission / reception dedicated channel is restricted, and congestion on the CSC inbound line is avoided.

【0012】[0012]

【発明の実施の形態】(構成の説明)本発明の衛星通信
方式の実施の形態について図面を参照して説明する。図
1は、本実施の形態のDAMA衛星通信方式の構成を示
す図である。親局1と、複数の子局2、3と、通信用衛
星4とから構成され、各子局はCSC送受信専用チャン
ネルに対応するCSC専用カード12と、電話機、デー
タ機器等の端末が接続されており、音声又はデータを送
受信する複数の通信用チャンネルに対応するバースト信
号受信機能を有する通信用カード13、14…とを有す
る。各局の機能は以下のとおりである。
DESCRIPTION OF THE PREFERRED EMBODIMENTS (Explanation of Configuration) An embodiment of a satellite communication system according to the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a DAMA satellite communication system according to the present embodiment. It comprises a master station 1, a plurality of slave stations 2, 3 and a communication satellite 4. Each slave station is connected to a CSC dedicated card 12 corresponding to a CSC transmission / reception dedicated channel, and a terminal such as a telephone and a data device. And communication cards 13, 14... Having a burst signal receiving function corresponding to a plurality of communication channels for transmitting and receiving voice or data. The functions of each station are as follows.

【0013】親局1は、通信用衛星4を介して子局2、
3…の全体に対して特定の周波数f2のCSCアウトバ
ウンド信号5を送出し、各子局を個別に特定して送受信
信号の有無を問い合わせを行う。各子局2、3…は、子
局内に実装されているCSC専用カード12、15を使
用したCSC送受信専用チャンネルにより前記CSCア
ウトバウンド信号5を受信する。
The master station 1 communicates with the slave stations 2 via a communication satellite 4.
The CSC outbound signal 5 of the specific frequency f2 is transmitted to all of the mobile stations 3..., And each slave station is individually specified to inquire whether there is a transmission / reception signal. Each of the slave stations 2, 3,... Receives the CSC outbound signal 5 through a dedicated CSC transmission / reception channel using a dedicated CSC card 12, 15 mounted in the slave station.

【0014】次に、各子局2、3…は、自局が指定され
た問い合わせのCSCアウトバウンド信号に対し、自局
の電話機、データ機器等の端末からの通信要求があれ
ば、親局1からの前記問い合わせへの応答信号として、
他の子局と共通の周波数f1を使用して時分割により、
接続要求等のCSCインバウンド信号6、7をそれぞれ
のCSC専用カード12、15を使用して親局1に向け
てバースト的に送信する。親局1は各子局2、3からの
CSCインバウンド信号8を受信し、各子局に対する通
信回線の割り当て等、DAMAネットワークの制御を行
う。
Each of the slave stations 2, 3,... Responds to a CSC outbound signal of an inquiry designated by the slave station, and receives a communication request from a terminal such as a telephone or data device of the slave station. As a response signal to the inquiry from
By time division using the common frequency f1 with other slave stations,
CSC inbound signals 6 and 7 such as a connection request are transmitted in bursts to the master station 1 using the respective CSC dedicated cards 12 and 15. The master station 1 receives the CSC inbound signal 8 from each of the slave stations 2 and 3, and controls the DAMA network such as assigning a communication line to each slave station.

【0015】また、各子局は、使用していない通信用カ
ード13、14、…、及び16、17、…を使用し、当
該通信用チャンネルによりCSCインバウンドキャリア
を受信して、CSCインバウンド回線のCSCインバウ
ンドキャリアを受信し、その中に含まれるCSCインバ
ウンド信号を検出し、CSCインバウンド回線の混み具
合を監視する。具体的には、一定時間当たりのCSCイ
ンバウンド信号の検出回数(検出率)を監視し、混み具
合があらかじめ決めたレベルを超えたら、当該通信用チ
ャンネルからの発呼が行えないように規制する。
Each of the slave stations uses an unused communication card 13, 14,..., 16, 17,..., Receives a CSC inbound carrier through the communication channel, and receives a CSC inbound line. It receives a CSC inbound carrier, detects a CSC inbound signal contained therein, and monitors the degree of congestion of the CSC inbound line. More specifically, the number of detections (detection rate) of the CSC inbound signal per fixed time is monitored, and if the congestion exceeds a predetermined level, the call from the communication channel is restricted from being made.

【0016】(動作の説明)本実施の形態においては、
親局はCSC信号を特定周波数f2により送出し、各子
局を順次指定して接続要求等の有無を問い合わせ、子局
からの要求に応じて接続許可応答等を行う。各子局はC
SC信号を周波数f2と異なる周波数f1のTDM方式
により各子局毎にバースト的に送出し、接続要求等を行
う。また、各子局が送受信する音声又はデータ等の通信
用チャンネルの情報は、例えばFDM方式により伝送す
るように構成することができる。
(Explanation of Operation) In this embodiment,
The master station transmits the CSC signal at the specific frequency f2, sequentially specifies each slave station, inquires of the presence or absence of a connection request, and performs a connection permission response or the like in response to a request from the slave station. Each slave station is C
The SC signal is transmitted in bursts for each slave station by the TDM system at a frequency f1 different from the frequency f2, and a connection request is made. Further, information of communication channels such as voice or data transmitted and received by each slave station can be configured to be transmitted by, for example, the FDM method.

【0017】各子局は、実装されているバースト信号受
信機能を有する通信用カード13、14、…及び16、
17、…のうちスタンバイ状態の通信カードにおいて、
当該通信カードの通信用チャンネルの受信周波数を前記
周波数f1に一致させて、親局からのCSCインバウン
ドキャリア8を受信し、そこから各子局が送出した全子
局のCSCインバウンド信号の1秒間の検出数を検出率
として計算する。CSCインバウンド信号は、通常数十
ミリ秒であり1秒間に20〜30バーストの送信が可能
であるが実際には衛星回線上での衝突等があることか
ら、検出率としては十数個程度までの範囲となる。
Each of the slave stations has a communication card 13, 14,.
17, among the communication cards in the standby state,
The receiving frequency of the communication channel of the communication card is matched with the frequency f1, the CSC inbound carrier 8 is received from the master station, and the CSC inbound signal of all the slave stations transmitted from each slave station for one second is received from the master station. The number of detections is calculated as the detection rate. The CSC inbound signal is usually several tens of milliseconds and can transmit 20 to 30 bursts per second. However, since there is actually a collision on a satellite line, the detection rate is up to about ten and several. Range.

【0018】この検出率に対して、予め所定値(スレッ
ショルド)を設定して、該スレッショルドと前記検出率
とを比較し、前記検出率が前記スレッショルドより大き
ければ衛星回線が混み合っていると判断し、通信用チャ
ンネルにおいて自発的に通信要求をCSC専用チャンネ
ルに行わないように規制する。例えば、通信チャンネル
に接続されている電話機からの通信要求に対してビジー
トーンを流したり、データ端末等に対する輻輳表示を行
う。また、更にCSC信号送受信専用カード12、15
によるCSC専用チャンネルからのCSCインバウンド
信号を送信しないように規制する。
A predetermined value (threshold) is set for the detection rate in advance, and the threshold is compared with the detection rate. If the detection rate is larger than the threshold, it is determined that the satellite link is congested. Then, a restriction is made so that a communication request is not spontaneously made on the CSC dedicated channel in the communication channel. For example, a busy tone is played in response to a communication request from a telephone connected to a communication channel, or congestion is displayed on a data terminal or the like. Further, cards 12 and 15 dedicated to CSC signal transmission and reception are further provided.
Is restricted so as not to transmit the CSC inbound signal from the CSC dedicated channel.

【0019】[0019]

【発明の効果】本発明によれば、インバウンド輻輳時に
子局の通信用チャンネルへの通信要求信号等に規制をか
けるように構成しているから、ネットワークとしてイン
バウンド信号輻輳によってCSCインバウンドの伝送効
率が低下することを防止することができる。また、CS
C専用チャンネルからのCSCインバウンド信号の送出
を規制することにより、前記伝送効率の低下を確実に防
止することが可能である。
According to the present invention, since the communication request signal to the communication channel of the slave station is restricted when the inbound congestion occurs, the transmission efficiency of the CSC inbound due to the inbound signal congestion is reduced as a network. It can be prevented from lowering. Also, CS
By restricting the transmission of the CSC inbound signal from the C-dedicated channel, it is possible to reliably prevent the transmission efficiency from decreasing.

【0020】また、子局側でインバウンド信号の輻輳を
監視し自主的に前述の規制を行うように構成しているか
ら、親局での監視及び親局から子局への規制信号の送出
を不要とし、規制信号の送受信チャンネルを設定する必
要がなく、親局側の設備及び親局側設備に応じた子局側
の設備も不要であるから、親局側及び子局側のコストを
抑えることが可能である。
Since the slave station monitors the congestion of the inbound signal and voluntarily performs the above-described regulation, the monitoring at the master station and the transmission of the regulation signal from the master station to the slave station are performed. It is unnecessary, and there is no need to set the transmission / reception channel of the regulation signal. Also, the equipment on the master station side and the equipment on the slave station side corresponding to the equipment on the master station side are unnecessary, so that the cost on the master station side and the slave station side is reduced It is possible.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施の形態を示すブロック図であ
る。
FIG. 1 is a block diagram showing an embodiment of the present invention.

【図2】従来の技術を示す図である。FIG. 2 is a diagram showing a conventional technique.

【符号の説明】[Explanation of symbols]

1 DAMA制御用親局 2、3 子局 4 通信用衛星 5 CSCアウトバウンド信号(周波数:f2) 6 子局2が送信したバースト波のCSCインバウンド
(信号周波数:f1) 7 子局3が送信したバースト波のCSCインバウンド
(信号周波数:f1) 8 CSCインバウンド信号 12、15 CSC専用カード 13、14、16、17 通信用カード 21 中心局DAMA制御装置 22 CSC送受信制御回路 23 トーキー送信回路 24 無線系装置 25 通信衛星 26a、26b 地球局DAMA制御装置 27a、27b CSC送受信制御回路 28a、28b 通話信号送受信回路 29a、29b 端末装置(トーキー用装置) 30a、30b 無線系装置
Reference Signs List 1 DAMA control master station 2, 3 slave station 4 communication satellite 5 CSC outbound signal (frequency: f2) 6 CSC inbound of burst wave transmitted by slave station 2 (signal frequency: f1) 7 burst transmitted by slave station 3 Wave CSC inbound (signal frequency: f1) 8 CSC inbound signal 12, 15 CSC dedicated card 13, 14, 16, 17 Communication card 21 Central station DAMA control unit 22 CSC transmission / reception control circuit 23 Talky transmission circuit 24 Wireless system device 25 Communication satellites 26a, 26b Earth station DAMA controller 27a, 27b CSC transmission / reception control circuit 28a, 28b Speech signal transmission / reception circuit 29a, 29b Terminal device (device for talkie) 30a, 30b Wireless device

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 5K028 AA07 AA11 BB05 CC05 DD01 DD02 LL42 MM12 MM13 RR01 5K051 BB01 BB02 CC05 FF03 FF22 HH03 JJ17 5K072 AA15 BB02 BB22 CC03 CC13 CC15 CC25 DD01 DD16 DD17 EE03 EE23 FF03 FF04 FF05 FF26 GG14 GG27 HH02  ──────────────────────────────────────────────────続 き Continued from the front page F term (reference) HH02

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 CSC信号送受信専用チャンネルにより
通信回線の割当制御が行われる通信用チャンネルを多チ
ャンネル実装した多元接続通信装置による衛星通信方式
において、前記通信用チャンネルが通信を行わないとき
に、当該通信用チャンネルでCSCインバウンドキャリ
アを受信し、各子局からのCSCインバウンド信号を検
出して前記CSCインバウンド信号の検出率を計算し、
前記検出率が一定値未満の場合に通信用チャンネルへの
発呼等の接続要求を許可し、前記検出率が前記一定値以
上の場合に前記接続要求を行わせないように通信用チャ
ンネルで規制することを特徴とするDAMA衛星通信方
式。
In a satellite communication system using a multiple-access communication device in which a communication channel for which communication channel allocation control is performed by a dedicated channel for transmitting and receiving a CSC signal is implemented by a multiple access communication device, when the communication channel does not perform communication, Receiving a CSC inbound carrier on a communication channel, detecting a CSC inbound signal from each slave station, calculating a detection rate of the CSC inbound signal,
When the detection rate is less than a certain value, a connection request such as a call to a communication channel is permitted, and when the detection rate is more than the certain value, the communication channel is restricted so as not to make the connection request. A DAMA satellite communication system.
【請求項2】 前記検出率が前記一定値未満の場合にC
SC送受信専用チャンネルからのCSCインバウンド信
号の送信を許可し、前記検出率が前記一定値以上の場合
にCSCインバウンド信号の送信を許可しないように、
前記CSC送受信専用チャンネルを規制することを特徴
とする請求項1記載のDAMA衛星通信方式。
2. When the detection rate is less than the predetermined value, C
To allow transmission of a CSC inbound signal from a dedicated SC transmission / reception channel, and to not permit transmission of a CSC inbound signal when the detection rate is equal to or higher than the certain value.
2. The DAMA satellite communication system according to claim 1, wherein the dedicated channel for CSC transmission and reception is regulated.
【請求項3】 CSC信号送受信専用チャンネルにより
通信回線の割当制御が行われる通信用チャンネルを多チ
ャンネル実装した多元接続通信装置であって、前記通信
用チャンネルが通信を行わないときに、当該通信用チャ
ンネルでCSCインバウンドキャリアを受信し、各子局
からのCSCインバウンド信号を検出して前記CSCイ
ンバウンド信号の検出率を計算し、前記検出率が前記一
定値未満の場合に通信用チャンネルへの発呼等の接続要
求を許可し、前記検出率が前記一定値以上の場合に前記
接続要求を行わせないように通信用チャンネルで規制す
ることを特徴とする多元接続通信装置。
3. A multiple-access communication device in which a communication channel for which communication channel allocation control is performed by a dedicated channel for CSC signal transmission / reception is implemented in multiple channels. A CSC inbound carrier is received on a channel, a CSC inbound signal from each slave station is detected, a detection rate of the CSC inbound signal is calculated, and a call to a communication channel is made when the detection rate is less than the predetermined value. A multiple access communication device that permits a connection request such as that described above, and restricts the communication channel so as not to make the connection request when the detection rate is equal to or greater than the predetermined value.
【請求項4】 前記検出率が前記一定値未満の場合にC
SC送受信専用チャンネルからのCSCインバウンド信
号の送信を許可し、前記検出率が前記一定値以上の場合
にCSCインバウンド信号の送信を許可しないように、
前記CSC送受信専用チャンネルを規制することを特徴
とする請求項3記載の多元接続通信装置。
4. When the detection rate is less than the predetermined value, C
To allow transmission of a CSC inbound signal from a dedicated SC transmission / reception channel, and to not permit transmission of a CSC inbound signal when the detection rate is equal to or higher than the certain value.
4. The multiple access communication device according to claim 3, wherein the CSC transmission / reception channel is restricted.
JP17333299A 1999-06-18 1999-06-18 Satellite communication system Pending JP2001007751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17333299A JP2001007751A (en) 1999-06-18 1999-06-18 Satellite communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17333299A JP2001007751A (en) 1999-06-18 1999-06-18 Satellite communication system

Publications (1)

Publication Number Publication Date
JP2001007751A true JP2001007751A (en) 2001-01-12

Family

ID=15958478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17333299A Pending JP2001007751A (en) 1999-06-18 1999-06-18 Satellite communication system

Country Status (1)

Country Link
JP (1) JP2001007751A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008252607A (en) * 2007-03-30 2008-10-16 Mitsubishi Electric Corp Satellite communication method, slave station, and master station
JP2008252608A (en) * 2007-03-30 2008-10-16 Mitsubishi Electric Corp Satellite communication method, slave station, and master station
JP2008278435A (en) * 2007-03-30 2008-11-13 Mitsubishi Electric Corp Satellite communication method, slave station, master station, and management station

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008252607A (en) * 2007-03-30 2008-10-16 Mitsubishi Electric Corp Satellite communication method, slave station, and master station
JP2008252608A (en) * 2007-03-30 2008-10-16 Mitsubishi Electric Corp Satellite communication method, slave station, and master station
JP2008278435A (en) * 2007-03-30 2008-11-13 Mitsubishi Electric Corp Satellite communication method, slave station, master station, and management station

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