JPS60153231A - Controlling method of antenna mounted on satellite - Google Patents
Controlling method of antenna mounted on satelliteInfo
- Publication number
- JPS60153231A JPS60153231A JP59008591A JP859184A JPS60153231A JP S60153231 A JPS60153231 A JP S60153231A JP 59008591 A JP59008591 A JP 59008591A JP 859184 A JP859184 A JP 859184A JP S60153231 A JPS60153231 A JP S60153231A
- Authority
- JP
- Japan
- Prior art keywords
- satellite
- beam antenna
- service area
- small zones
- area
- 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
Classifications
-
- 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
- H04B7/204—Multiple access
- H04B7/2041—Spot beam multiple access
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は通信用周回衛星に搭載されたマルチビームアン
テナの指向方向制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a pointing direction control device for a multi-beam antenna mounted on an orbiting communication satellite.
（従来技術と問題点）
第１図は従来のマルチビームアンテナを搭載した通信用
周回衛星による通信方式の概念図である。図中、１は軌
道、２，２′は衛星、３゜３′は衛星によりサービスさ
れるサービス地域、４、〜４輸、４′、〜４′「ｎ は
衛星のマルチビームアンテナの個々のビームにより照射
される小ゾーンを表わしており、添字はビーム番号を示
していて全ビーム数は輸個であることを示している。(Prior Art and Problems) FIG. 1 is a conceptual diagram of a communication system using an orbiting communication satellite equipped with a conventional multi-beam antenna. In the figure, 1 is the orbit, 2 and 2' are the satellites, 3°3' are the service areas served by the satellites, 4, ~4x, 4', ~4', and n is the individual satellite multibeam antennas. It represents the small zone irradiated by the beam, and the subscript indicates the beam number, indicating that the total number of beams is integer.
また、衛星２は軌道１上を矢印の方向に移動し、ある時
間後に衛星２′ の位置に到達することを表わしている
。It also indicates that the satellite 2 moves in the direction of the arrow on the orbit 1 and reaches the position of the satellite 2' after a certain time.
衛星のマルチビームアンテナの個々のビームにより照射
される小ゾーンで使用する無線チャネルは電波干渉によ
る悪影響を避けるため、近接する小ゾーン間では異なる
無線チャネルが割当てられ、電波干渉が問題とならない
程度に十分離れた小ゾーン間では同一の無線チャネルが
割当てられる。従来のマルチビームアンテナでは、衛星
の軌道誤差等によるマルチビームアンテナの指向誤差を
修正するために指向方向制御装置ｌｌが用いられている
が、衛星の周回に連動した指向制御は行なっていないの
で、第１図中の矢印で示すように衛星２が軌道１上を衛
星２′の位置に移動すると衛星によりサービスされるサ
ービス地域３も ３′へ移動する。そのため、サービス
地域内の各地球局をサービスする小ゾーン４１〜４ｍを
短時間の内に小ゾーン４′、〜４’ｍ に切り替える必
要を生ずる。In order to avoid the negative effects of radio interference on the radio channels used in the small zones irradiated by the individual beams of the satellite's multi-beam antenna, different radio channels are assigned between adjacent small zones to the extent that radio interference does not become a problem. The same radio channel is assigned between small zones that are sufficiently far apart. In conventional multi-beam antennas, a pointing direction control device 11 is used to correct pointing errors of the multi-beam antenna due to satellite orbit errors, etc., but pointing control device 11 is not performed in conjunction with the orbit of the satellite. As indicated by the arrow in FIG. 1, when the satellite 2 moves on the orbit 1 to the position of the satellite 2', the service area 3 served by the satellite also moves to the position 3'. Therefore, it becomes necessary to switch the small zones 41 to 4m serving each earth station within the service area to small zones 4' and 4'm within a short time.
゛ 例えば軌道１を高度５００＆ｘ、サービス地域３及
び３′の直径を８０Ａｚ、＋ｎ を４． ＯＯとした場
合小ゾーンの切替わる時間は約１０秒である。゛ For example, if orbit 1 is an altitude of 500&x, the diameter of service areas 3 and 3' is 80Az, and +n is 4. In the case of OO, the time for switching the small zones is approximately 10 seconds.
近接する小ゾーン間では使用する無線チャネルが異なる
ため、地球局では小ゾーンが切替わるごとに無線チャネ
ルを切り替える必要がある。Since the radio channels used differ between adjacent small zones, the earth station needs to switch the radio channel each time the small zone changes.
一方、衛星においても、各地球局をサービスする小ゾー
ンが切替わるごとに、衛星内交換機の接続切替を必要と
する。このように、各地球局をサービスする小ゾーンが
短時間で切替わるため、地球局および衛星ともに頻繁に
無線チャネル又は交換機の切り替えを必要とする欠点が
あった。On the other hand, in the case of a satellite as well, each time the sub-zone serving each earth station changes, the connection of the satellite switch must be changed. In this way, since the small zones serving each earth station are switched in a short period of time, there is a drawback in that both the earth station and the satellite require frequent switching of radio channels or exchanges.
（発明の目的）
本発明はこの欠点を除去するため、衛星がある地域をサ
ービスする時間内において、各マルチビームが常に同一
地域を照射するように指向制御するもので、その目的は
地球局の無線チャネルおよび衛星内交換機の切替頻度の
減少にある。(Object of the Invention) In order to eliminate this drawback, the present invention controls the direction so that each multi-beam always illuminates the same area during the time when the satellite is serving a certain area. This is due to a reduction in the switching frequency of radio channels and intra-satellite exchanges.
（発明の構成および作用）
第２図は本発明の実施例である。５は軌道で第１図と等
しい。６．６’、６”は各時刻ｔｌｔｔ２およびｔｓ（
但しｔ＋＋ ｔ２ｙ ｔｓ の順で遅くなるものとする
。）における衛星を示す。７は衛星６．６’、６″によ
りサービスされているサービス地域、８Ｉ〜８ ｔｏは
マルチビームアンテナの個々のビームによりサービスさ
れている小ゾーンで第１図のサービス地域３．３′およ
び小ゾーン４＋−４＋ａ 、４’、−４’ｍ と面積は
等しいが、衛星の移動とともに移動することなく、地上
に固定している。９および１０は軌道５の地−Ｌ軌跡が
サービス地域７の境界と交わる交点であり、交、α９は
衛星６の直下、α、交点１０は衛星６″の直下点である
。衛星は衛星６の位置においてサービス地域７へのサー
ビスを開始しマルチビームアンテナは小ゾーン８１〜８
粕をそれぞれ正確に照射する。 衛星は衛星６から衛星
６′、衛星６″と移動していくが、この間マルチビーム
アンテナは、常に同一の小ゾーン ８１〜８ｍを照射す
る。衛星が衛星６″の位１６を過ぎると次のサービス地
域へマルチビームアンテナを切り替える。したがって、
時刻１．−１．において衛星内交換機は接続の切り替え
を必要としない。(Structure and operation of the invention) FIG. 2 shows an embodiment of the invention. 5 is the orbit, which is the same as in Figure 1. 6.6', 6'' are each time tltt2 and ts(
However, it is assumed that the delay increases in the order of t++ t2y ts. ). 7 is the service area served by satellites 6.6', 6'', and 8I to 8to are the small zones serviced by the individual beams of the multi-beam antenna. Zones 4+-4+a, 4', and -4'm have the same area, but they do not move with the movement of the satellite and are fixed on the ground.In 9 and 10, the ground-L trajectory of orbit 5 is the same as that of service area 7. The intersection α9 is directly below the satellite 6, and the intersection 10 is directly below the satellite 6''. The satellite starts service to service area 7 at the position of satellite 6, and the multi-beam antenna starts serving small zones 81-8.
Irradiate each lees accurately. The satellite moves from satellite 6 to satellite 6' to satellite 6'', but during this time the multi-beam antenna always illuminates the same small zone 81 to 8 m.When the satellite passes the 16th position of satellite 6'', the next Switch the multi-beam antenna to the service area. therefore,
Time 1. -1. In-satellite switching does not require connection switching.
前例の軌道５の高度５００ｋｚ、サービス地域３の直径
８０Ａｘのシステムにおいて、時刻ｔ１〜し、は約３．
５分間である。地球局においても、この間に無線チャネ
ルを切り替える必要はない。In the previous example, in the system where orbit 5 has an altitude of 500 kHz and service area 3 has a diameter of 80 Ax, time t1~ is about 3.
It is 5 minutes. There is no need for the earth station to switch radio channels during this time either.
さらに、衛星が衛星６″の位置に米だ時に後続の衛星が
衛星６の位置に米るように、複数の衛星を軌道５上に配
置し、各衛星のマルチビームアンテナパターンおよび各
小ゾーンでの使用無線チャネルを等しくしておけば、地
球局は次々と米る衛星により切断なく、かつ使用無線チ
ャネルを切り替えることなく通信が可能である。Furthermore, multiple satellites are arranged in orbit 5 so that when a satellite is at the position of satellite 6'', the following satellite is at the position of satellite 6'', and each satellite's multi-beam antenna pattern and each sub-zone are If the radio channels used by the earth stations are made the same, the earth station can communicate with the satellites one after another without disconnection and without switching the radio channels used.
なお、衛星マルチビームアンテナ指向制御は７エーズド
アレーアンテナ技術、又は機械的にアンテナ反射鏡およ
び給電部の姿勢を制御する技術など周知の技術によって
容易に行なうことができる。Incidentally, the satellite multi-beam antenna pointing control can be easily performed using a well-known technique such as a seven-aided array antenna technique or a technique of mechanically controlling the attitude of an antenna reflector and a power feeding section.
（発明の効果）
以上説明したように、通信用周回衛星のマルチビームア
ンテナの照射する小ゾーンが固定した地域を照射し衛星
の移動とともに移動することがないため、衛星内交換機
及び地球局の切替頻度を大幅に減少できる利点がある。(Effect of the invention) As explained above, since the small zone illuminated by the multi-beam antenna of the orbiting communication satellite illuminates a fixed area and does not move with the movement of the satellite, switching between the in-satellite switching equipment and the earth station is possible. It has the advantage of significantly reducing the frequency.
第１図は従来のマルチビームアンテナを搭載した通信用
周回衛星を用いた通信方式概念図、第２図は本発明の実
施例である。
１・・・・・・軌道、２．２′・・・・・・衛星、３，
３′・・・・・・サービス地域、 ４１〜４ｍ 、４’
、〜４’ｍ・・・・・・小ゾーン、５・・・・・・軌道
、６．６’、６”・・・・・・衛星、７・・・・・・サ
ービス地域、８１〜８ｗ・・・・・・小ゾーン、９゜１
０・・・・・・軌道５の地上軌跡がサービス地域７の境
界と交わる交点
代理人 弁理士 本 間 崇FIG. 1 is a conceptual diagram of a communication system using an orbiting communication satellite equipped with a conventional multi-beam antenna, and FIG. 2 is an embodiment of the present invention. 1...orbit, 2.2'...satellite, 3,
3'...Service area, 41~4m, 4'
, ~4'm...Small zone, 5...Orbit, 6.6', 6"...Satellite, 7...Service area, 81~ 8w...Small zone, 9゜1
0...The intersection point where the ground trajectory of orbit 5 intersects with the boundary of service area 7 Agent Patent attorney Takashi Honma
Claims (1)
た通信方式において、衛星が、あるサービス地域に対し
て予め定められたサービス開始位置に米た時に前記衛星
のアンテナの全ビームを前記サービス地域内の定められ
た各小ゾーンにそれぞれ指向させ、衛星が軌道上を移動
する間も各ビームは同一の小ゾーンを指向するよう制御
し、衛星が予め定められたサービス終了位置に米た時に
、衛星の前記アンテナの全ビームを次のサービス地域へ
指向させることを特徴とする衛星搭載アンテナ制御方式
。In a communication system using an orbiting communication satellite equipped with a multi-beam antenna, when the satellite is positioned at a predetermined service start position for a certain service area, all beams of the satellite's antenna are transmitted to the area within the service area. Each beam is directed to each predetermined small zone, and while the satellite moves in orbit, each beam is controlled to be directed to the same small zone, and when the satellite reaches the predetermined service end position, the satellite beam A satellite-mounted antenna control system characterized by directing all beams of the antenna to a next service area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008591A JPS60153231A (en) | 1984-01-23 | 1984-01-23 | Controlling method of antenna mounted on satellite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008591A JPS60153231A (en) | 1984-01-23 | 1984-01-23 | Controlling method of antenna mounted on satellite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60153231A true JPS60153231A (en) | 1985-08-12 |
Family
ID=11697224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59008591A Pending JPS60153231A (en) | 1984-01-23 | 1984-01-23 | Controlling method of antenna mounted on satellite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60153231A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02179035A (en) * | 1988-10-28 | 1990-07-12 | Motorola Inc | Satellite cellular telephone and data communication system |
| JPH03126330A (en) * | 1989-10-02 | 1991-05-29 | Motorola Inc | Method of predicting inter-cell delivery of satellite cellular communication system |
| JPH03139927A (en) * | 1989-10-02 | 1991-06-14 | Motorola Inc | Telemetry tracking control system for satellite celler communication system |
| JPH07162351A (en) * | 1993-10-12 | 1995-06-23 | Trw Inc | Cell type telecommunication method using satellite of medium earth height as base thereof |
-
1984
- 1984-01-23 JP JP59008591A patent/JPS60153231A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02179035A (en) * | 1988-10-28 | 1990-07-12 | Motorola Inc | Satellite cellular telephone and data communication system |
| JPH03126330A (en) * | 1989-10-02 | 1991-05-29 | Motorola Inc | Method of predicting inter-cell delivery of satellite cellular communication system |
| JPH03139927A (en) * | 1989-10-02 | 1991-06-14 | Motorola Inc | Telemetry tracking control system for satellite celler communication system |
| US5867783A (en) * | 1991-04-22 | 1999-02-02 | Trw Inc. | Medium-earth-altitute satellite-based cellular telecommunications |
| JPH07162351A (en) * | 1993-10-12 | 1995-06-23 | Trw Inc | Cell type telecommunication method using satellite of medium earth height as base thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9681337B2 (en) | Satellite-to-satellite handoff in satellite communications system | |
| US5739784A (en) | Method and beam stepping apparatus for a satellite cellular communication system | |
| US6233456B1 (en) | Method and apparatus for adjacent coverage area handoff in communication systems | |
| US5227802A (en) | Satellite system cell management | |
| KR100395381B1 (en) | Method for operating a subscriber unit in a cellular communication system | |
| US5537679A (en) | Communication network with flexible handoff scheduling for mobile nodes | |
| DE69730265T2 (en) | A method and apparatus for controlling call handover in a satellite telecommunication arrangement | |
| CN113472398B (en) | Satellite tracking apparatus, method, gateway station and medium for the same | |
| KR20190050785A (en) | In a satellite communication system, | |
| US6128488A (en) | Non-geostationary satellite communication systems, and station and terminal thereof | |
| CA2195662A1 (en) | Multi-beam tdma satellite mobile communications system | |
| JPH0775156A (en) | Cellular communication system with planned hand off | |
| JPH03139927A (en) | Telemetry tracking control system for satellite celler communication system | |
| KR20010012194A (en) | High latitude geostationary satellite system | |
| EP1046247B1 (en) | Beam management in a satellite communication system | |
| US6138021A (en) | Method and apparatus for providing deterministic hand-offs in a cellular communication system | |
| EP0575678B1 (en) | Medium-earth-altitude satellite-based cellular telecommunications system | |
| US6272345B1 (en) | Method and apparatus for region based hand-offs in a satellite communication system | |
| JPS60153231A (en) | Controlling method of antenna mounted on satellite | |
| JPH098722A (en) | Communication system by nongeostationary satellite, and included satellite, station and terminal in the system | |
| US5537681A (en) | Communication network with incoming calls directed through moving cells and method for operating same | |
| SE9800633D0 (en) | Subspace, which combines antenna beams in a base station | |
| JP2006279558A (en) | Communication terminal, control office equipment and satellite communication device | |
| KR100585902B1 (en) | Satellite broadcasting method, and base station and mobile station for use with satellite broadcasting method | |
| AU758090B2 (en) | Method and apparatus for adjacent service area handoff in communication systems |