JPH0856189A - Receiver for satellite communication - Google Patents
Receiver for satellite communicationInfo
- Publication number
- JPH0856189A JPH0856189A JP6191401A JP19140194A JPH0856189A JP H0856189 A JPH0856189 A JP H0856189A JP 6191401 A JP6191401 A JP 6191401A JP 19140194 A JP19140194 A JP 19140194A JP H0856189 A JPH0856189 A JP H0856189A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- packet
- base station
- time
- processing unit
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Circuits Of Receivers In General (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＯＲＢＣＯＭＭ受信機
などの衛星通信の受信機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite communication receiver such as an ORBCOMM receiver.
【０００２】[0002]
【従来の技術】最近、１０００ＫＭ上空を周回する低軌
道衛星を利用した基地局−端末間通信システムが注目さ
れている。その一つに、緊急通報（事故や急病の発生時
に救助要請と自位置を通報）、移動体追尾（トラックや
レンタカー、コンテナ等の位置確認、盗難監視）、デー
タ収集（環境測定や検診などのモニタリング）およびデ
ータ通信（パソコン通信、ＰＯＳ等の双方向のデータ伝
送）などを行うオービコム（ＯＲＢＣＯＭＭ）システム
などが開発されている。2. Description of the Related Art Recently, attention has been paid to a base station-terminal communication system using a low-orbit satellite orbiting over 1000 KM. One of them is emergency call (reports rescue request and own position when an accident or sudden illness occurs), moving body tracking (position confirmation of trucks, rental cars, containers, etc., theft monitoring), data collection (environmental measurement, medical examination, etc.). An ORBCOMM system for performing (monitoring) and data communication (personal computer communication, bidirectional data transmission such as POS), etc. has been developed.
【０００３】[0003]
【発明が解決しようとする課題】上記した通信システム
において、例えばオービコムシステムではその加入者端
末は約１００万台にもなる。通常、基地局が特定端末に
対して複数回のポーリングをかけるとき、従来はその度
ごとにポーリング要求パケットを任意の時間に特定の加
入者端末に対して送信している。In the communication system described above, for example, in the Orbicom system, the number of subscriber terminals is about 1 million. Normally, when a base station polls a specific terminal a plurality of times, conventionally, a polling request packet is transmitted to a specific subscriber terminal at an arbitrary time each time.
【０００４】しかしながら、上記従来方法では、加入者
端末はいつポーリングされるのか分からないので常時受
信系の電源を入れて受信可能な状態を維持しておかなけ
ればならず、そのために電力を消費し、さらに基地局か
らの複数回のポーリング毎にポーリング要求パケットが
送信されてくるので、上述したような加入者端末の総数
が非常に多い場合、基地局−加入者端末間の通信トラフ
ィックが増大し、通信エラーが発生しやすくなるという
問題点を有していた。However, in the above-mentioned conventional method, since the subscriber terminal does not know when it will be polled, it is necessary to always turn on the power of the receiving system to maintain the receivable state, which consumes power. Moreover, since a polling request packet is sent from the base station every time polling is performed a plurality of times, if the total number of subscriber terminals is extremely large as described above, communication traffic between the base station and subscriber terminals increases. However, there is a problem that a communication error is likely to occur.
【０００５】本発明は上記課題を解決するもので、電力
の消費を低減して内部電源での長時間動作を実現し、さ
らには基地局からのポーリング要求パケットの送信回数
をへらすことにより通信エラーを低減できる衛星通信の
受信機を提供することを目的としている。The present invention solves the above-described problems, and realizes a communication error by reducing the power consumption, realizing a long-time operation with an internal power supply, and further reducing the number of times a base station transmits a polling request packet. It is an object of the present invention to provide a satellite communication receiver capable of reducing the noise.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を達
成するために、衛星からの信号を受信するためのアンテ
ナ部と、アンテナ部で受信した信号からパケット情報を
取り出す受信処理部と、加入者端末から基地局にパケッ
トを送信する送信処理部と、時間を測定する時間測定部
と、制御部とを構成し、この制御部が基地局からのポー
リング要求パケットを前記受信処理部で受信・解析し、
前記ポーリング要求パケット内に指定してある送信パケ
ット数・送信間隔時間情報を取り出し、その指定にした
がって前記送信処理部により前記基地局にパケットを送
信して、その送信後、前記時間測定部を用いて前記送信
間隔時間中は前記受信処理部の電源を切るように制御
し、前記送信間隔時間が経過したら前記受信処理部の電
源を入れて衛星を捕捉し、前記送信処理部により前記基
地局にパケットを送信する動作を前記送信パケット数分
だけ繰り返すように制御するようにしたものである。In order to achieve the above object, the present invention comprises an antenna section for receiving a signal from a satellite, a reception processing section for extracting packet information from the signal received by the antenna section, A transmission processing unit that transmits a packet from the subscriber terminal to the base station, a time measurement unit that measures time, and a control unit are configured, and the control unit receives the polling request packet from the base station by the reception processing unit.・ Analyze
The transmission packet number / transmission interval time information designated in the polling request packet is taken out, the transmission processing unit transmits a packet to the base station according to the designation, and after the transmission, the time measurement unit is used. The reception processing unit is controlled to be turned off during the transmission interval time, and when the transmission interval time has elapsed, the reception processing unit is turned on to capture a satellite and the transmission processing unit causes the base station to The operation of transmitting a packet is controlled so as to be repeated by the number of transmitted packets.
【０００７】[0007]
【作用】上記構成により、基地局からの複数回のポーリ
ング要求において、基地局側から送信パケット数、送信
間隔をあらかじめ指定することによって、送信時間以外
の時間は受信系の電源を切ることができ、その結果消費
電力を大幅に低減でき、内部電源による長時間動作を可
能にし、さらには基地局からのポーリング要求パケット
の送信回数を減らすことにより通信エラーを低減でき
る。With the above construction, the power of the receiving system can be turned off at times other than the transmission time by specifying the number of transmission packets and the transmission interval in advance from the base station side in a plurality of polling requests from the base station. As a result, it is possible to significantly reduce power consumption, enable long-time operation by the internal power supply, and further reduce the number of times polling request packets are transmitted from the base station to reduce communication errors.
【０００８】[0008]
【実施例】以下本発明の一実施例について、図面を参照
しながら説明する。図１は本発明の一実施例の衛星通信
における受信機の構成ブロック図、図２は同衛星通信に
おける受信機の基地局との通信のフローチャート、図３
は同衛星通信における受信機の基地局との通信のシーケ
ンス図である。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a receiver in satellite communication according to an embodiment of the present invention, FIG. 2 is a flowchart of communication of the receiver with a base station in the satellite communication, and FIG.
FIG. 3 is a sequence diagram of communication of a receiver with a base station in the satellite communication.
【０００９】図１において、１は衛星６からの信号を受
信するためのアンテナ部、２はアンテナ部１で受信した
信号からパケット情報を取り出す受信処理部、３は加入
者端末８から基地局７にパケットを送信する送信処理
部、４は時間を測定する時間測定部、５は制御部であ
る。この制御部５は、基地局７からのポーリング要求パ
ケットを受信処理部２で受信・解析し、ポーリング要求
パケット内に指定してある送信パケット数・送信間隔時
間情報を取り出し、その指定にしたがって送信処理部３
により基地局７にパケットを送信し、その送信後、時間
測定部４を用いて送信間隔時間中は受信処理部２の電源
を切るように制御する。すなわち、基地局７にパケット
を送信してから前記送信間隔時間が経過したら受信処理
部２の電源を入れて衛星６を捕捉し、送信処理部３によ
り基地局７にパケットを送信する動作を送信パケット数
分だけ繰り返すように制御する。In FIG. 1, 1 is an antenna unit for receiving a signal from a satellite 6, 2 is a reception processing unit for extracting packet information from the signal received by the antenna unit 1, 3 is a subscriber terminal 8 to a base station 7. Is a transmission processing unit for transmitting a packet to a packet, 4 is a time measuring unit for measuring time, and 5 is a control unit. The control unit 5 receives and analyzes the polling request packet from the base station 7 by the reception processing unit 2, extracts the number of transmission packets and transmission interval time information specified in the polling request packet, and transmits according to the specification. Processing unit 3
Then, the packet is transmitted to the base station 7, and after the packet is transmitted, the time measuring unit 4 is used to control the reception processing unit 2 to be turned off during the transmission interval time. That is, when the transmission interval time elapses after transmitting the packet to the base station 7, the reception processing unit 2 is turned on to capture the satellite 6, and the transmission processing unit 3 transmits the operation of transmitting the packet to the base station 7. It is controlled to repeat for the number of packets.
【００１０】次に、以上のように構成された送受信装置
の動作を図２のフローチャートおよび図３のシーケンス
図を参照しながら説明する。まず、加入者端末８の使用
方法として、例えば温度・湿度等のモニタリング端末と
しての使用、またＧＰＳと接続して自動車に搭載し、自
動車の位置データを送信するトラッキング端末としての
使用が考えられる。いずれにしても定期的に測定データ
を基地局７に送信する使用法が有効である。そこで、基
地局７は、各加入者端末固有の端末番号と共に、送信回
数と送信間隔時間情報をパケット化して衛星６経由で加
入者端末８にポーリング要求コマンドを含むパケットを
送信する（ステップ１）。Next, the operation of the transmitting / receiving apparatus configured as described above will be described with reference to the flowchart of FIG. 2 and the sequence diagram of FIG. First, as a method of using the subscriber terminal 8, for example, use as a monitoring terminal for temperature / humidity or the like, or use as a tracking terminal that is mounted on a vehicle by connecting to GPS and transmits position data of the vehicle can be considered. In any case, the usage method in which the measurement data is periodically transmitted to the base station 7 is effective. Therefore, the base station 7 packetizes the number of transmissions and transmission interval time information together with the terminal number unique to each subscriber terminal and transmits the packet including the polling request command to the subscriber terminal 8 via the satellite 6 (step 1). .
【００１１】加入者端末８は、このパケットを受信・解
析して、送信回数と送信間隔時間情報を取り出し（ステ
ップ２）、１回目のパケット送信を行う（ステップ
３）。このパケットの情報としては、上述した温度・湿
度等データ、あるいは位置データが考えられる。The subscriber terminal 8 receives and analyzes this packet, extracts the transmission count and transmission interval time information (step 2), and performs the first packet transmission (step 3). As the information of this packet, the above-mentioned temperature / humidity data or position data can be considered.
【００１２】次に加入者端末８は、パケット送信後に受
信処理部２の電源を切り（ステップ４）、省電力モード
へと移行する。これと同時に、時間測定部４を用いて送
信間隔時間分だけ省電力モードを持続するように監視す
る。Next, the subscriber terminal 8 turns off the power of the reception processing unit 2 after transmitting the packet (step 4), and shifts to the power saving mode. At the same time, the time measuring unit 4 is used to monitor the power saving mode for the transmission interval time.
【００１３】加入者端末８は、時間測定部４により送信
間隔時間がタイムアップしたことを検知すると（ステッ
プ５）、受信処理部２の電源を投入し衛星６を捕捉する
（ステップ６）。When the subscriber terminal 8 detects that the transmission interval time has expired by the time measuring section 4 (step 5), the reception processing section 2 is turned on and the satellite 6 is captured (step 6).
【００１４】加入者端末８は、送信回数分だけ送信した
かをチェックして（ステップ７）、まだ送信回数分だけ
パケット送信していない場合は、ステップ３に戻って上
述のパケット送信・受信処理部オフ・送信間隔時間タイ
ムアップのチェック・受信処理部オン・パケット送信の
処理を繰り返す。The subscriber terminal 8 checks whether the packet has been transmitted by the number of transmissions (step 7), and if the packet has not been transmitted by the number of transmissions yet, returns to step 3 and performs the above-mentioned packet transmission / reception processing. Repeat the process of turning off the copy / checking the transmission interval time up, turning on the reception processing part, and transmitting the packet.
【００１５】[0015]
【発明の効果】以上のように本発明は、基地局からの複
数回のポーリング要求において、基地局側から送信パケ
ット数、送信間隔時間をあらかじめ指定することによっ
て、送信時間以外の時は受信系の電源を切ることがで
き、その結果消費電力を大幅に低減でき、内部電源によ
る長時間動作を可能にし、さらには基地局からポーリン
グ要求パケットの送信回数を減らすことにより通信エラ
ーを低減できる。As described above, according to the present invention, in a plurality of polling requests from the base station, the number of packets to be transmitted and the transmission interval time are designated in advance from the side of the base station, so that the reception system can be used when the transmission time is other than Power can be turned off, resulting in a significant reduction in power consumption, long-term operation by an internal power supply, and further reduction in the number of polling request packet transmissions from the base station, thereby reducing communication errors.
【図１】本発明の一実施例の衛星通信における受信機の
構成ブロック図FIG. 1 is a block diagram of a configuration of a receiver in satellite communication according to an embodiment of the present invention.
【図２】本発明の一実施例の衛星通信における受信機の
基地局との通信のフローチャートFIG. 2 is a flowchart of communication between a receiver and a base station in satellite communication according to an embodiment of the present invention.
【図３】本発明の一実施例の衛星通信における受信機の
基地局との通信のシーケンス図FIG. 3 is a sequence diagram of communication between a receiver and a base station in satellite communication according to an embodiment of the present invention.
１ アンテナ部 ２ 受信処理部 ３ 送信処理部 ４ 時間測定部 ５ 制御部 ６ 衛星 ７ 基地局 ８ 加入者端末 1 antenna section 2 reception processing section 3 transmission processing section 4 time measuring section 5 control section 6 satellite 7 base station 8 subscriber terminal
Claims (1)
部と、このアンテナ部で受信した信号からパケット情報
を取り出す受信処理部と、加入者端末から基地局にパケ
ットを送信する送信処理部と、時間を測定する時間測定
部と、制御部とを備え、この制御部が、基地局からのポ
ーリング要求パケットを前記受信処理部で受信・解析
し、前記ポーリング要求パケット内に指定してある送信
パケット数・送信間隔時間情報を取り出し、その指定に
したがって前記送信処理部により前記基地局にパケット
を送信し、その送信後、前記時間測定部を用いて前記送
信間隔時間が経過するまでは前記受信処理部の電源を切
るように制御し、前記送信間隔が経過したら前記受信処
理部の電源を入れて衛星を捕捉し、前記送信処理部によ
り前記基地局にパケットを送信する動作を前記送信パケ
ット数分だけ繰り返すように制御することを特徴とする
衛星通信の受信機。1. An antenna unit for receiving a signal from a satellite, a reception processing unit for extracting packet information from a signal received by the antenna unit, and a transmission processing unit for transmitting a packet from a subscriber terminal to a base station. , A time measuring unit for measuring time, and a control unit, the control unit receives and analyzes the polling request packet from the base station by the reception processing unit, and transmits the polling request packet specified in the polling request packet. The packet number / transmission interval time information is extracted, the transmission processing unit transmits a packet to the base station according to the specification, and after the transmission, the reception is performed until the transmission interval time elapses using the time measurement unit. The processing unit is controlled to be turned off, and when the transmission interval elapses, the reception processing unit is turned on to capture a satellite, and the transmission processing unit transmits a packet to the base station. The receiver of satellite communications and the controller controls so as to repeat the operation of transmitting bets only the transmission number of packets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19140194A JP3254917B2 (en) | 1994-08-15 | 1994-08-15 | Satellite communication receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19140194A JP3254917B2 (en) | 1994-08-15 | 1994-08-15 | Satellite communication receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0856189A true JPH0856189A (en) | 1996-02-27 |
| JP3254917B2 JP3254917B2 (en) | 2002-02-12 |
Family
ID=16273996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19140194A Expired - Fee Related JP3254917B2 (en) | 1994-08-15 | 1994-08-15 | Satellite communication receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3254917B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005057355A (en) * | 2003-08-06 | 2005-03-03 | Mitsumi Electric Co Ltd | Communication system, communication apparatus, and communication method |
| JP2011055072A (en) * | 2009-08-31 | 2011-03-17 | Mitsubishi Electric Corp | Optical communication system, office side device, and subscriber side device |
-
1994
- 1994-08-15 JP JP19140194A patent/JP3254917B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005057355A (en) * | 2003-08-06 | 2005-03-03 | Mitsumi Electric Co Ltd | Communication system, communication apparatus, and communication method |
| US7356018B2 (en) | 2003-08-06 | 2008-04-08 | Mitsumi Electric Co., Ltd. | Communication system, communication device, and communication method |
| JP2011055072A (en) * | 2009-08-31 | 2011-03-17 | Mitsubishi Electric Corp | Optical communication system, office side device, and subscriber side device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3254917B2 (en) | 2002-02-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |