JPS635930B2 - - Google Patents
Info
- Publication number
- JPS635930B2 JPS635930B2 JP57198730A JP19873082A JPS635930B2 JP S635930 B2 JPS635930 B2 JP S635930B2 JP 57198730 A JP57198730 A JP 57198730A JP 19873082 A JP19873082 A JP 19873082A JP S635930 B2 JPS635930 B2 JP S635930B2
- Authority
- JP
- Japan
- Prior art keywords
- satellite
- subscriber
- communication
- signal
- channel
- 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.)
- Expired
Links
- 238000004891 communication Methods 0.000 claims description 33
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W99/00—Subject matter not provided for in other groups of this subclass
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18558—Arrangements for managing communications, i.e. for setting up, maintaining or releasing a call between stations
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radio Relay Systems (AREA)
Description
【発明の詳細な説明】
本発明は衛星チヤネルを通信路として使用する
デマンドアサイン方式による衛星通信方式、特に
衛星加入者相互が通信する場合の衛星通信方式に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a satellite communication system using a demand assignment method using a satellite channel as a communication path, and particularly to a satellite communication system when satellite subscribers communicate with each other.
従来、衛星チヤネルを利用した衛星加入者相互
通信の場合は、第１図に示す如く、例えば発呼
者、すなわち発信加入者Ａにはチヤネル＃１をア
サインし、被呼者、すなわち着信加入者Ｂにはチ
ヤネル＃２をアサインし、衛星制御交換機EXの
自局内トランクIOTを介して通話が行なわれてい
た。しかしながら、このような従来方式では、高
価な衛星チヤネルが２チヤネル必要になるため不
経済であり、更に衛星通話路の伝送遅延が大きく
サービスが低下する欠点があつた。 Conventionally, in the case of satellite subscriber mutual communication using satellite channels, as shown in Fig. 1, for example, the calling party, ie, calling subscriber A, is assigned channel #1, and the called party, ie, called subscriber A, is assigned channel #1. Channel #2 was assigned to B, and the call was being made via the local trunk IOT of the satellite-controlled exchange EX. However, such a conventional system is uneconomical because it requires two expensive satellite channels, and also has the disadvantage that the transmission delay of the satellite communication path is large and the service is degraded.
本発明の目的は上記従来の欠点を解決した衛星
通信方式を提供することにある。 An object of the present invention is to provide a satellite communication system that solves the above-mentioned conventional drawbacks.
本発明によれば、衛星制御交換機の制御のもと
で通信衛星を介して発呼者及び被呼者の衛星端末
装置間の通話路が形成される衛星通信方式におい
て、前記衛星制御交換機が、前記発呼者及び被呼
者の双方が衛星端末加入者であることを識別する
手段、前記両衛星端末装置に対して同一通話チヤ
ネルを割当てる手段、前記発呼者及び被呼者へ衛
星加入者相互通信である旨の信号を送出する手段
及びチヤネル使用中を表示する特殊信号をモニタ
する手段を有し、前記両衛星端末装置が、前記衛
星加入者相互通信時の通話中に前記特殊信号を相
互に送出する手段を有する衛星通信方式が得られ
る。 According to the present invention, in a satellite communication system in which a communication path between a calling party and a called party's satellite terminal devices is formed via a communication satellite under the control of a satellite-controlled exchange, the satellite-controlled exchange means for identifying that both the calling party and the called party are satellite terminal subscribers; means for allocating the same communication channel to both the satellite terminal equipment; It has means for sending a signal indicating mutual communication, and means for monitoring a special signal indicating that the channel is in use, and both satellite terminal devices transmit the special signal during a call during mutual communication between the satellite subscribers. A satellite communication system having means for mutual transmission is obtained.
以下、本発明の一実施例につき図面を参照して
詳細に説明する。 Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第２図は本発明による衛星通信方式の一実施例
を示した中継方式図である。図において、Ａは発
信加入者（発呼者）の電話機、Ｂは着信加入者
（被呼者）の電話機、SEUは衛星加入者端末装置
（衛星端末装置）、SATは通信衛星、ANTはアン
テナ、ESは地上局、EXは衛星制御交換機、
ICT／OGTはトランク類を示す。 FIG. 2 is a relay system diagram showing an embodiment of the satellite communication system according to the present invention. In the figure, A is the telephone of the originating subscriber (calling party), B is the telephone of the receiving subscriber (called party), SEU is the satellite subscriber terminal equipment (satellite terminal equipment), SAT is the communication satellite, and ANT is the antenna. , ES is the ground station, EX is the satellite control exchange,
ICT/OGT indicates trunks.
第２図において、発信加入者（発呼者）は電話
機Ａの受話器を上げることにより発呼要求が交換
機EXに伝送される。発信加入者（発呼者）Ａは
ダイヤルトーン聴取後、被呼者Ｂ番号をダイヤル
する。交換器EXはこのダイヤルを受信し、ダイ
ヤル解析した結果、他局呼なら出トランク
（OGT）を介して陸上局へ接続する。一方、着信
加入者（被呼者）Ｂが衛星加入者である場合、交
換機EXは、発呼者Ａ及び被呼者Ｂを衛星端末加
入者と判断し、被呼者Ｂへ着信アクセスするとと
もに、被呼者Ｂ及び発呼者Ａ側へ衛星加入者相互
通信である旨の情報を送出し、通話チヤネル＃１
を指定し、交換機EX自身はモニタ状態となる。 In FIG. 2, the originating subscriber (calling party) picks up the handset of telephone A, and a call request is transmitted to exchange EX. After the originating subscriber (calling party) A hears the dial tone, he dials the number of the called party B. Exchange EX receives this dial and analyzes the dial. If the call is from another station, it connects to the land station via the outgoing trunk (OGT). On the other hand, if the terminating subscriber (called party) B is a satellite subscriber, the exchange EX determines that the calling party A and called party B are satellite terminal subscribers, and provides incoming access to called party B. , sends information to called party B and calling party A that it is satellite subscriber mutual communication, and calls channel #1.
is specified, and the exchange EX itself enters the monitor state.
一方、被呼者Ｂは、上記着信アクセス信号を受
けた衛星加入者端末装置SEUからの呼出し信号
により呼出される。被呼者Ｂからの応答信号は、
通信衛星SAT経由で発呼者Ａ側をモニタしてい
る交換器EX側で受信される。通話中には、衛星
加入者端末装置SEUから後述する特殊信号（チ
ヤネル使用中信号）が発呼者Ａ、被呼者Ｂ相互に
送出される。この特殊信号は、衛星制御交換機
EXにてモニタされる。以下、これら動作につい
て更に詳細に説明する。 On the other hand, the called party B is called by a paging signal from the satellite subscriber terminal SEU which has received the above-mentioned incoming access signal. The response signal from called party B is
It is received via the communications satellite SAT at the exchange EX side that monitors the calling party A side. During the call, a special signal (channel busy signal), which will be described later, is sent to both the calling party A and the called party B from the satellite subscriber terminal SEU. This special signal is sent to the satellite-controlled exchange
Monitored by EX. These operations will be explained in more detail below.
第３図は本発明に係わる衛星加入者相互通信時
の衛星加入者端末装置からの特殊信号の送出、衛
星制御交換機での特殊信号モニタ方法及びその判
定の一実施例を説明したタイムチヤートである。
図において、ａ図およびｂ図は、それぞれ加入者
Ａから加入者Ｂへおよび加入者Ｂから加入者Ａへ
の信号の送受信関係を示し、ANS信号は、加入
者Ｂが応答（Ｂ ANS）することにより加入者
Ａ側へ送られ（ｂ図）、加入者Ａ側よりこの確認
信号として加入者Ｂ側へANS ACK信号が送出
される（ａ図）。これらの信号の後に続く信号は、
前述した特殊信号で、この実施例では3825Hzのパ
ルス信号（100msオン、900msオフ）であり、
各々の加入者Ａ及びＢがオンフツク（RLS）す
るまで相手方に送られる。ｃ図およびｄ図は、交
換機EX側での上記信号（特殊信号を含む）のモ
ニタタイミング（SCN TIM）（モニタ時間は１
秒以上、間隔は10秒毎）を示す。c′図およびd′図
は、それぞれｃ図およびｄ図で加入者Ａ側および
加入者Ｂ側の通話路をモニタした結果（SCN
RST）を示し、信号（特殊信号を含む）が確認
された場合は“１”、確認されなつた場合は“０”
で表示されている。ｅ図は、c′図およびd′図の結
果が両方“０”になつた時通話が終了したもの、
即ち図の斜線で示された時間が通話中（TALK）
と見なしていることを示す。 FIG. 3 is a time chart illustrating an embodiment of the sending of a special signal from a satellite subscriber terminal device during satellite subscriber mutual communication, a special signal monitoring method in a satellite control exchange, and its judgment according to the present invention. .
In the figure, figures a and b show the transmission and reception relationship of signals from subscriber A to subscriber B and from subscriber B to subscriber A, respectively, and the ANS signal is the one that subscriber B responds to (B ANS). As a result, the ANS ACK signal is sent to the subscriber A side (Figure b), and the ANS ACK signal is sent from the subscriber A side to the subscriber B side as this confirmation signal (Figure a). The signals following these signals are
The special signal mentioned above is a 3825Hz pulse signal (100ms on, 900ms off) in this example,
is sent to the other party until each subscriber A and B goes on-hook (RLS). Figures c and d show the monitor timing (SCN TIM) of the above signals (including special signals) on the exchange EX side (the monitor time is 1
seconds or more, the interval is every 10 seconds). Figures c' and d' show the results (SCN
RST), “1” if the signal (including special signals) is confirmed, “0” if it is not confirmed.
is displayed. In figure e, the call ends when the results in figures c' and d' both become "0";
In other words, the time indicated by diagonal lines in the diagram is when the call is in progress (TALK).
Indicates that it is regarded as such.
上記実施例において、特殊信号は、通話帯域外
信号であるので通話に妨害を与えず、特殊信号を
パルスとしているのは、通信衛星SATでのエネ
ルギー消費を減少させるためである。又、交換機
EXが特殊信号等を間隔を置いてモニタしている
のは、常時モニタしているとモニタ用チヤネルが
多く必要となるので、同一モニタチヤネルを共用
するために有効である。 In the above embodiment, the special signal is a signal outside the communication band, so it does not interfere with the communication, and the reason why the special signal is made into a pulse is to reduce energy consumption in the communication satellite SAT. Also, exchange machine
The reason why the EX monitors special signals and the like at intervals is effective for sharing the same monitor channel, since constant monitoring would require a large number of monitor channels.
以上の説明で明らかなように、本発明によれ
ば、経済的で且つ通話品質を維持した衛星加入者
相互通信が可能となり、大陸内衛星通信（ドムサ
ツト）、インマリサツト等の適用において多大の
効果が発揮される。 As is clear from the above explanation, according to the present invention, it is possible to perform mutual communications between satellite subscribers economically and while maintaining call quality, and it has great effects in applications such as intracontinental satellite communication (DomSat) and InmariSat. Demonstrated.
第１図は従来の衛星通信方式を示した中継方式
図、第２図は本発明による衛星通信方式の一実施
例を示した中継方式図、第３図は本発明に係わる
衛星加入者端末装置から特殊信号の送出及び衛星
制御交換機でのモニタ関係の一実施例を示したタ
イムチヤートである。
Ａ……発信加入者の電話機、Ｂ……着信加入者
の電話機、SEU……デマンドアサイン機能を有
する衛星加入者端末装置、SAT……通信衛星、
ANT……アンテナ装置、ES……衛星通信用地上
局装置、EX……衛星制御交換機、IOT……自局
内トランク、ICT／OGT……入トランク／出ト
ランク。
Fig. 1 is a relay system diagram showing a conventional satellite communication system, Fig. 2 is a relay system diagram showing an embodiment of the satellite communication system according to the present invention, and Fig. 3 is a satellite subscriber terminal device according to the present invention. This is a time chart showing an example of the transmission of special signals from the satellite and the monitoring at the satellite control exchange. A...Telephone of calling subscriber, B...Telephone of called subscriber, SEU...Satellite subscriber terminal device with demand assignment function, SAT...Communication satellite,
ANT...Antenna equipment, ES...Ground station equipment for satellite communication, EX...Satellite control exchange, IOT...Internal trunk, ICT/OGT...Incoming trunk/outgoing trunk.
Claims (1)
して発呼者及び被呼者の衛星端末装置間の通話路
が形成される衛星通信方式において、前記衛星制
御交換機が、前記発呼者及び被呼者の双方が衛星
端末加入者であることを識別する手段、前記両衛
星端末装置に対して同一通話チヤネルを割当てる
手段、前記発呼者及び被呼者へ衛星加入者相互通
信である旨の信号を送出する手段及びチヤネル使
用中を表示する特殊信号をモニタする手段を有
し、前記両衛星端末装置が、前記衛星加入者相互
通信時の通話中に前記特殊信号を相互に送出する
手段を有する衛星通信方式。1. In a satellite communication system in which a communication path is established between a calling party and a called party's satellite terminal equipment via a communication satellite under the control of a satellite-controlled exchange, said satellite-controlled switching means for identifying that both called parties are satellite terminal subscribers; means for allocating the same communication channel to both said satellite terminal devices; and means for indicating to said calling party and said called party that it is satellite subscriber mutual communication. and means for monitoring a special signal indicating that the channel is in use, and means for both the satellite terminal devices to mutually send the special signal during a call when the satellite subscribers are communicating with each other. A satellite communication system with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57198730A JPS5989042A (en) | 1982-11-12 | 1982-11-12 | Satellite communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57198730A JPS5989042A (en) | 1982-11-12 | 1982-11-12 | Satellite communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5989042A JPS5989042A (en) | 1984-05-23 |
| JPS635930B2 true JPS635930B2 (en) | 1988-02-05 |
Family
ID=16396026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57198730A Granted JPS5989042A (en) | 1982-11-12 | 1982-11-12 | Satellite communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5989042A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0646627U (en) * | 1992-11-27 | 1994-06-28 | 由美 小柳 | Tea strainer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06103256B2 (en) * | 1988-08-12 | 1994-12-14 | 三井造船株式会社 | Environmental measuring device |
-
1982
- 1982-11-12 JP JP57198730A patent/JPS5989042A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0646627U (en) * | 1992-11-27 | 1994-06-28 | 由美 小柳 | Tea strainer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5989042A (en) | 1984-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU708182B2 (en) | Allocation of time slots in a mobile communication system | |
| US4568800A (en) | Multi-channel access (MCA) radio telephone system | |
| US4112257A (en) | Comprehensive automatic mobile radio telephone system | |
| EP0862839B1 (en) | A method for establishing a wireless telecommunication connection | |
| CA2142020A1 (en) | Method and apparatus for transferring a radiotelephone call from one coverage area to another | |
| US4220821A (en) | Off-hook initiated demand assignment communications | |
| JPH0242257B2 (en) | ||
| US5930240A (en) | Radio frequency communication system with a repeater that operates with a time division multiple access protocol | |
| JPS635930B2 (en) | ||
| CA1289282C (en) | Subscriber-concentrated communication system | |
| EP0673569B1 (en) | Arrangement for a short-range radio system | |
| US3105118A (en) | Mobile radio stations interconnected with a wire telephone system | |
| JPH0129104B2 (en) | ||
| JP2505441B2 (en) | Digital exchange network | |
| JP2990711B2 (en) | A method for promptly knowing telephone charges in maritime satellite communications. | |
| GB921834A (en) | Delayed call telephone system | |
| JPS6156565A (en) | Inter-office call-back system | |
| KR100215718B1 (en) | Method of call setup and release using sub-band signaling in a satellite communication system | |
| JPS61177830A (en) | Portable telephone system | |
| KR0177967B1 (en) | Sending call information of electronic switching center | |
| JPS5833348A (en) | Exchanging system of satellite communication | |
| KR100222658B1 (en) | Method for transceiving phone number using forward control channel | |
| JPS6327150A (en) | Satellite channel relaying system for mobile communication | |
| JPS61177038A (en) | Mobile communication system | |
| JPS58142646A (en) | Satellite communication system |