JPH05130002A - Multiple address communication data transmission method for radio communication - Google Patents

Multiple address communication data transmission method for radio communication

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Publication number
JPH05130002A
JPH05130002A JP28782591A JP28782591A JPH05130002A JP H05130002 A JPH05130002 A JP H05130002A JP 28782591 A JP28782591 A JP 28782591A JP 28782591 A JP28782591 A JP 28782591A JP H05130002 A JPH05130002 A JP H05130002A
Authority
JP
Japan
Prior art keywords
data
station
transmission
group
stations
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
JP28782591A
Other languages
Japanese (ja)
Inventor
Kenji Furukawa
憲志 古川
Yasuki Nishi
泰樹 西
Masato Mori
真人 森
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP28782591A priority Critical patent/JPH05130002A/en
Publication of JPH05130002A publication Critical patent/JPH05130002A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To provide the multiple address communication data transmission method in which data transmission is finished in a short time for a reception station with excellent line quality even when a reception station with deteriorated line quality is in existence. CONSTITUTION:In the multiple address communication data transmission method in radio communication in which data are sent from a transmission station 10 simultaneously to plural reception stations 20-1-20-3, the plural reception stations 20-1-20-3 are divided into two groups or over based on the result of the measurement of the line quality from the transmission station 10 to the plural reception stations 20-1-20-3 or its reception performance and location or the like or both of them prior to the transmission of the multiple address communication data, and the transmission station 10 sends the multiple address communication data to each group of the plural reception stations 20-1-20-3 and the line between the transmission station and the reception stations belonging to each group is disconnected sequentially for each group whose transmission is finished.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、衛星通信等の無線通信
における同報データ伝送方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast data transmission method in wireless communication such as satellite communication.

【０００２】[0002]

【従来の技術】衛星通信システムにおいて、通信衛星の
照射エリアの広さを生かした通信サービスの１つに同報
通信がある。2. Description of the Related Art In satellite communication systems, there is broadcast communication as one of the communication services that makes the most of the irradiation area of communication satellites.

【０００３】図２は従来のこの種の同報データ伝送方法
の一例を示すもので、図中、１は通信衛星、２は通信衛
星１の照射エリア、３は送信局、４−１〜４−３は受信
局である。前記構成において、送信局３から通信衛星１
に対して送信データ５をただ１度送信すると、通信衛星
１から複数の受信局４−１〜４−３に対してそれぞれ受
信データ６−１，６−２，６−３（内容は送信データ５
と同一）が送信されることになり、同一データの一斉伝
送、即ち同報がなされることになる。なお、送信データ
５及び受信データ６−１〜６−３は所定のフレーム構成
を有する複数、ここでは３つのデータフレームａからな
り、各データフレームに付した数字(1),(2),(3) はフレ
ーム番号を示す。FIG. 2 shows an example of a conventional broadcast data transmission method of this kind. In the figure, 1 is a communication satellite, 2 is an irradiation area of the communication satellite 1, 3 is a transmitting station, and 4-1 to 4 are shown. -3 is a receiving station. In the above configuration, the transmitting station 3 to the communication satellite 1
To the plurality of receiving stations 4-1 to 4-3 from the communication satellite 1 respectively, the transmission data 5 is transmitted only once. 5
The same data) will be transmitted, and the same data will be transmitted simultaneously, that is, broadcast. The transmission data 5 and the reception data 6-1 to 6-3 are composed of a plurality of data frames a each having a predetermined frame structure, here three data frames a, and the numbers (1), (2) and ( 3) indicates the frame number.

【０００４】ところで、前記システムでは通信衛星１に
よる回線の品質が悪い場合、データ誤りを生じることが
考えられる。このため、より高い伝送品質を得るにはＡ
ＲＱ（Auto Repeat Request ）方式を適用する必要があ
る。By the way, in the above system, it is conceivable that a data error will occur if the line quality of the communication satellite 1 is poor. Therefore, to obtain higher transmission quality, A
It is necessary to apply the RQ (Auto Repeat Request) method.

【０００５】図３は図２の通信システムにＳＲ（Select
ive Repeat）−ＡＲＱ方式を適用した場合の同報データ
の伝送例を示すもので、図中、７は送信局３から通信衛
星１へ伝送された送信データ、８−１〜８−３は通信衛
星１から受信局４−１〜４−３へ伝送された受信データ
である。なお、受信データ８−１〜８−３中、斜線の入
ったフレームは誤って受信されたデータフレームを示
す。FIG. 3 shows the SR (Select
ive Repeat) -shows an example of transmission of broadcast data when the ARQ method is applied. In the figure, 7 is transmission data transmitted from the transmission station 3 to the communication satellite 1, and 8-1 to 8-3 are communications. It is the received data transmitted from the satellite 1 to the receiving stations 4-1 to 4-3. It should be noted that in the received data 8-1 to 8-3, the shaded frames indicate erroneously received data frames.

【０００６】ＳＲ−ＡＲＱ方式は受信局が受信したデー
タフレームのうち、誤りの検出されたフレームだけを再
送要求するＡＲＱ方式であり、一対一通信における基本
的なＡＲＱ方式の中では最も良い伝送効率を有する。即
ち、フレーム誤り率をＰf とし、受信局におけるバッフ
ァ容量を無限大とすれば、その伝送効率は（１−Ｐf）
になる。The SR-ARQ system is an ARQ system that requests retransmission of only the frame in which an error is detected among the data frames received by the receiving station, and has the best transmission efficiency among the basic ARQ systems in one-to-one communication. Have. That is, if the frame error rate is Pf and the buffer capacity at the receiving station is infinite, the transmission efficiency is (1-Pf).
become.

【０００７】ところが、同報通信にＡＲＱ方式を適用す
る場合には、受信局数により実効的なフレーム誤り率が
異なってくる。いま、受信局がｎ局存在し、全受信局が
等しいフレーム誤り率Ｐf であるとすると、送信局から
みた実効的なフレーム誤り率（ｎ局のうち、いずれかの
受信局で誤りが生ずる確率）Ｐsは Ｐs ＝１−（１−Ｐf ）n となる。なぜなら、同報通信では送信局から送信したフ
レームが全受信局のうちの少なくとも１つの局に誤って
受信されれば、そのフレームを再送しなければならない
からである。即ち、同報通信にＡＲＱ方式を適用する場
合には受信局数ｎの増加と、受信局のフレーム誤り率Ｐ
f の劣化とが伝送効率を低下させる要因となる。さらに
また、フレーム誤り率Ｐf が極端に悪い受信局が１つで
も存在すれば、その受信局の影響により回線品質の良い
他の全ての受信局が伝送効率の低下を招くことになる。However, when the ARQ method is applied to the broadcast communication, the effective frame error rate varies depending on the number of receiving stations. Now, assuming that there are n receiving stations and all receiving stations have the same frame error rate Pf, the effective frame error rate as seen from the transmitting station (the probability that an error will occur at any of the n receiving stations) ) Ps becomes Ps = 1- (1-Pf) n . This is because in broadcast communication, if a frame transmitted from a transmitting station is erroneously received by at least one of all receiving stations, that frame must be retransmitted. That is, when the ARQ method is applied to the broadcast communication, the number of receiving stations n increases and the frame error rate P of the receiving stations is increased.
Deterioration of f is a factor that reduces transmission efficiency. Furthermore, if there is even one receiving station with an extremely poor frame error rate Pf, all other receiving stations with good line quality will suffer from a decrease in transmission efficiency due to the influence of that receiving station.

【０００８】図３の例では受信データ８−３においてフ
レーム番号（１）〜（５）のデータが誤って受信され続
けている、即ち受信局４−３にフレーム番号（１）〜
（５）の全てのデータが誤って受信され続けているた
め、送信データ７中にフレーム番号（１）〜（５）のデ
ータフレームが繰返し送出され続けている。この結果、
受信データ８−１及び８−２においてフレーム番号
（１）〜（５）のデータが正しく受信されている、即ち
受信局４−１及び４−２にはフレーム番号（１）〜
（５）の全てのデータが既に正しく受信されているにも
拘らず、前記受信局４−３が正しく受信できるまで同じ
データを受信し続けることになる。In the example of FIG. 3, the data of the frame numbers (1) to (5) continue to be erroneously received in the received data 8-3, that is, the frame number (1) to the receiving station 4-3.
Since all the data of (5) is continuously received by mistake, the data frames of frame numbers (1) to (5) are repeatedly transmitted in the transmission data 7. As a result,
Data of frame numbers (1) to (5) are correctly received in the received data 8-1 and 8-2, that is, the frame numbers (1) to (4-2) are received by the receiving stations 4-1 and 4-2.
Even though all the data in (5) have been correctly received, the same data will continue to be received until the receiving station 4-3 can correctly receive the data.

【０００９】[0009]

【発明が解決しようとする課題】このように同報通信に
ＡＲＱ方式をそのまま適用すると、回線品質の悪い受信
局が回線品質の良い受信局の伝送効率を低下させ、特に
回線品質の極端に悪い受信局が一局でも存在すれば、他
の全ての受信局の伝送効率を著しく低下させ、回線品質
の良い受信局までも長時間束縛してしまうという問題点
があった。If the ARQ method is applied to the broadcast communication as it is, the receiving station with poor line quality lowers the transmission efficiency of the receiving station with good line quality, and especially the line quality is extremely poor. If there is even one receiving station, there is a problem that the transmission efficiency of all other receiving stations is significantly reduced, and even receiving stations with good channel quality are bound for a long time.

【００１０】本発明は前述した従来の問題点を解決し、
回線品質の悪い受信局が存在しても回線品質の良い受信
局に対しては短時間でデータ伝送を完了させ、長時間、
無意味に束縛することのない同報データ伝送方法を提供
することを目的とする。The present invention solves the above-mentioned conventional problems,
Even if there are receiving stations with poor line quality, data transmission is completed in a short time for receiving stations with good line quality, and
It is an object of the present invention to provide a broadcast data transmission method that is not bound to meaninglessly.

【００１１】[0011]

【課題を解決するための手段】本発明では前記問題点を
解決するため、請求項１として、一の無線局より複数の
他の無線局に対して同時にデータを伝送する無線通信に
おける同報データ伝送方法において、同報データの伝送
に先立って、一の無線局から複数の他の無線局までの回
線の品質をそれぞれ測定し、該測定結果に基いて複数の
他の無線局を２以上のグループに分割し、一の無線局よ
り複数の他の無線局に対して、前記グループ毎に同報デ
ータの伝送を行い、伝送が完了したグループ毎に、順
次、該グループに属する他の無線局と一の無線局との回
線を切断するようになした無線通信における同報データ
伝送方法、また、請求項２として、一の無線局より複数
の他の無線局に対して同時にデータを伝送する無線通信
における同報データ伝送方法において、複数の他の無線
局をその受信性能、所在地等に基いて２以上のグループ
に分割し、一の無線局より複数の他の無線局に対して、
前記グループ毎に同報データの伝送を行い、伝送が完了
したグループ毎に、順次、該グループに属する他の無線
局と一の無線局との回線を切断するようになした無線通
信における同報データ伝送方法、また、請求項３とし
て、一の無線局より複数の他の無線局に対して同時にデ
ータを伝送する無線通信における同報データ伝送方法に
おいて、同報データの伝送に先立って、一の無線局から
複数の他の無線局までの回線の品質をそれぞれ測定し、
該測定結果並びにその受信性能、所在地等に基いて複数
の他の無線局を２以上のグループに分割し、一の無線局
より複数の他の無線局に対して、前記グループ毎に同報
データの伝送を行い、伝送が完了したグループ毎に、順
次、該グループに属する他の無線局と一の無線局との回
線を切断するようになした無線通信における同報データ
伝送方法を提案する。In order to solve the above problems in the present invention, as claim 1, broadcast data in wireless communication in which data is simultaneously transmitted from one wireless station to a plurality of other wireless stations. In the transmission method, prior to the transmission of the broadcast data, the quality of the line from one wireless station to a plurality of other wireless stations is measured, and a plurality of other wireless stations are set to two or more based on the measurement result. Divide into groups and transmit broadcast data for each group from one wireless station to a plurality of other wireless stations, and for each group that has completed transmission, other wireless stations that belong to the group in sequence. And a method for transmitting broadcast data in wireless communication in which the line with one wireless station is disconnected, and as claim 2, data is simultaneously transmitted from one wireless station to a plurality of other wireless stations. Broadcast data in wireless communication In the delivery method, the reception performance a plurality of other radio stations, divided into two or more groups based on the location or the like, to a plurality of other radio stations than the one radio station,
Broadcast data is transmitted for each group, and for each group that has completed transmission, the line between one wireless station and another wireless station belonging to the group is sequentially disconnected. A data transmission method, and as a claim 3, a broadcast data transmission method in wireless communication in which data is simultaneously transmitted from one radio station to a plurality of other radio stations, prior to transmission of the broadcast data, From each wireless station to multiple other wireless stations,
A plurality of other wireless stations are divided into two or more groups based on the measurement result, reception performance, location, etc., and broadcast data for each group from one wireless station to a plurality of other wireless stations. We propose a broadcast data transmission method in wireless communication in which each of the groups for which the transmission has been completed is sequentially disconnected from the other wireless stations belonging to the group.

【００１２】[0012]

【作用】本発明の請求項１によれば、同報データの伝送
に先立って、一の無線局から複数の他の無線局までの回
線の品質がそれぞれ測定され、該測定結果に基いて複数
の他の無線局が２以上のグループに分割され、一の無線
局より複数の他の無線局に対して、前記グループ毎に同
報データの伝送が行われ、伝送が完了したグループ毎
に、順次、該グループに属する他の無線局と一の無線局
との回線が切断される。また、請求項２によれば、複数
の他の無線局がその受信性能、所在地等に基いて２以上
のグループに分割され、一の無線局より複数の他の無線
局に対して、前記グループ毎に同報データの伝送が行わ
れ、伝送が完了したグループ毎に、順次、該グループに
属する他の無線局と一の無線局との回線が切断される。
また、請求項３によれば、同報データの伝送に先立っ
て、一の無線局から複数の他の無線局までの回線の品質
がそれぞれ測定され、該測定結果並びにその受信性能、
所在地等に基いて複数の他の無線局が２以上のグループ
に分割され、一の無線局より複数の他の無線局に対し
て、前記グループ毎に同報データの伝送が行われ、伝送
が完了したグループ毎に、順次、該グループに属する他
の無線局と一の無線局との回線が切断される。According to claim 1 of the present invention, the quality of the line from one radio station to a plurality of other radio stations is measured prior to the transmission of the broadcast data, and a plurality of lines are measured based on the measurement results. The other wireless stations are divided into two or more groups, and the broadcast data is transmitted from one wireless station to a plurality of other wireless stations for each group, and for each group for which the transmission is completed, The line between one wireless station and another wireless station belonging to the group is sequentially disconnected. Further, according to claim 2, a plurality of other wireless stations are divided into two or more groups based on their reception performance, location, etc., and the one wireless station sends the plurality of other wireless stations to the group. The broadcast data is transmitted every time, and the line between the other wireless station belonging to the group and the one wireless station is sequentially disconnected for each group for which the transmission is completed.
Further, according to claim 3, the quality of the line from one radio station to a plurality of other radio stations is measured prior to the transmission of the broadcast data, and the measurement result and its reception performance,
A plurality of other wireless stations are divided into two or more groups based on the location, etc., and one wireless station transmits broadcast data to each of the plurality of other wireless stations for each group, and the transmission is performed. For each completed group, the line between one wireless station and another wireless station belonging to the group is sequentially disconnected.

【００１３】[0013]

【実施例】図１は本発明の無線通信における同報データ
伝送方法の一実施例を示すもので、図中、１は通信衛
星、２は通信衛星１の照射エリア、１０は送信局、２０
−１，２０−２，２０−３は受信局、３０は送信デー
タ、４０−１，４０−２，４０−３は受信データであ
る。1 shows an embodiment of a method for transmitting broadcast data in wireless communication according to the present invention, in which 1 is a communication satellite, 2 is an irradiation area of the communication satellite 1, 10 is a transmitting station, and 20 is a transmitting station.
-1, 20-2, 20-3 are receiving stations, 30 is transmission data, and 40-1, 40-2, 40-3 are reception data.

【００１４】送信局１０は、回線品質測定部１１と、グ
ループ分割部１２と、データ伝送部１３−１及び１３−
２と、制御部１４とを備えている。回線品質測定部１１
は同報データの伝送に先立って、各受信局２０−１〜２
０−３までの回線の品質をそれぞれ後述する如くして測
定する。グループ分割部１２は前記回線品質測定部１１
で求められた測定結果に基いて各受信局２０−１〜２０
−３を２以上のグループ、ここでは回線品質の良いグル
ープＧ１と、回線品質の悪いグループＧ２とに分割す
る。データ伝送部１３−１及び１３−２はそれぞれグル
ープＧ１及びＧ２に属する受信局に対してＳＲ−ＡＲＱ
方式によるデータ伝送を独立して実行する。制御部１４
は前記各部を制御して回線品質の測定、グループ分割、
同報データ伝送を実行させるとともに、受信局に対する
各種の情報の通知、回線の接続及び切断制御等を行う。The transmitting station 10 includes a line quality measuring unit 11, a group dividing unit 12, and data transmitting units 13-1 and 13-.
2 and the control unit 14. Line quality measurement unit 11
Prior to transmitting the broadcast data, each of the receiving stations 20-1 to 20-2
The quality of the lines from 0 to 3 is measured as described later. The group dividing unit 12 uses the line quality measuring unit 11
The receiving stations 20-1 to 20-20 based on the measurement results obtained in
-3 is divided into two or more groups, here a group G1 with good line quality and a group G2 with poor line quality. The data transmitters 13-1 and 13-2 provide SR-ARQ to the receiving stations belonging to the groups G1 and G2, respectively.
The data transmission by the method is performed independently. Control unit 14
Controls the above units to measure line quality, divide into groups,
The broadcast data transmission is executed, various information is notified to the receiving station, line connection and disconnection control, etc. are performed.

【００１５】受信局２０−１〜２０−３は、それぞれグ
ループ情報保持部２１と、データ抽出部２２と、制御部
２３とを備えている（但し、図面の都合上、これらは受
信局２０−３においてのみ示す。）。グループ情報保持
部２１は送信局１０より通知されるグループ情報、ここ
ではグループ番号Ｇ１又はＧ２を保持する。データ抽出
部２２は受信されるデータ中より該当するグループ対応
のデータのみを抽出する。制御部２３は前記各部を制御
してグループ情報保持、データ抽出を実行させるととも
に、送信局に対する各種の応答信号の送出等を行う。Each of the receiving stations 20-1 to 20-3 includes a group information holding section 21, a data extracting section 22 and a control section 23 (however, for the convenience of the drawings, these are receiving stations 20-. Shown only in 3.). The group information holding unit 21 holds the group information notified from the transmitting station 10, here, the group number G1 or G2. The data extraction unit 22 extracts only the data corresponding to the corresponding group from the received data. The control unit 23 controls the respective units to hold group information and execute data extraction, and also sends various response signals to the transmitting station.

【００１６】図４は前記システムにおける送信データの
フレーム構成並びに受信局からの応答信号の送信タイミ
ング及びそのフレーム構成の一例を示すものである。図
中、３０ａは送信データ３０の１フレームを示し、ユニ
ークワードａ1、制御信号ａ2 及びデータａ3 から構成
されている。また、図中、５０−１，５０−２，５０−
３はそれぞれ受信局２０−１，２０−２，２０−３の応
答信号であり、これらの信号は送信データ３０の制御信
号ａ2 中に設定されて伝送されるタイミング情報に基い
て互いに衝突しないように時分割的に送信される。該応
答信号５０−１〜５０−３の１フレームはユニークワー
ドｂ1 、制御信号ｂ2 及びデータｂ3 から構成され、こ
の応答信号５０−１〜５０−３は受信局２０−１〜２０
−３毎の回線品質の測定やＡＲＱのための応答信号とし
て使用される。FIG. 4 shows an example of the frame structure of the transmission data, the transmission timing of the response signal from the receiving station and the frame structure in the system. In the figure, 30a indicates one frame of the transmission data 30, which is composed of a unique word a1, a control signal a2 and data a3. In the figure, 50-1, 50-2, 50-
3 are response signals of the receiving stations 20-1, 20-2 and 20-3, respectively, and these signals are set so as not to collide with each other based on the timing information set in the control signal a2 of the transmission data 30 and transmitted. Will be transmitted in a time-sharing manner. One frame of the response signals 50-1 to 50-3 is composed of a unique word b1, a control signal b2 and data b3, and the response signals 50-1 to 50-3 are the receiving stations 20-1 to 20-20.
It is used as a response signal for measuring the channel quality for each −3 and ARQ.

【００１７】次に、前記システムの動作について説明す
る。Next, the operation of the system will be described.

【００１８】まず、送信局１０の制御部１４は送信デー
タ３０中の制御信号ｂ2 を用いて回線品質の測定を行う
旨を全受信局に通知する。各受信局２０−１〜２０−３
は前記通知を受信すると、制御部２３により応答信号の
データｂ3 中に回線品質の測定のためのＰＮパターンを
設定するとともに、制御信号ｂ2 中に該ＰＮパターンを
伝送中である旨を示す情報を設定して、これを送信す
る。First, the control unit 14 of the transmitting station 10 notifies all the receiving stations that the line quality is measured by using the control signal b2 in the transmission data 30. Each receiving station 20-1 to 20-3
When the notification is received, the control unit 23 sets a PN pattern for measuring the line quality in the response signal data b3, and the control signal b2 displays information indicating that the PN pattern is being transmitted. Set and send this.

【００１９】送信局１０は前記応答信号を受信すると、
回線品質測定部１１において該応答信号中のＰＮパター
ンと、内部で発生したＰＮパターンとを比較することに
より各受信局２０−１〜２０−３までの回線品質を測定
する。なお、各受信局２０−１〜２０−３の識別は応答
信号の制御信号ｂ2 中にそれぞれの局番号を設定するこ
とにより実現可能である。When the transmitting station 10 receives the response signal,
The line quality measuring unit 11 measures the line quality of each of the receiving stations 20-1 to 20-3 by comparing the PN pattern in the response signal with the internally generated PN pattern. The receiving stations 20-1 to 20-3 can be identified by setting their respective station numbers in the control signal b2 of the response signal.

【００２０】次に、送信局１０はグループ分割部１２に
より、前述した回線品質の測定結果に基いて受信局２０
−１〜２０−３をグループＧ１及びＧ２に分割、例えば
受信局２０−１，２０−２をグループＧ１に、また、受
信局２０−３をグループＧ２に分割する。さらに、送信
局１０の制御部１４は前記グループ分けの結果を送信デ
ータ３０を用いて、即ち制御信号ａ2 に受信局の局番号
を、また、データａ3にグループ番号を設定して各受信
局２０−１〜２０−３へ通知する。なお、この通知は充
分な信頼度を保証する必要があるため、複数のフレーム
に亘って連続送信する。各受信局２０−１〜２０−３は
前記通知を受信すると、対応するグループ番号をグルー
プ情報保持部２１にそれぞれ書込む。Next, the transmitting station 10 causes the group dividing unit 12 to receive the receiving station 20 based on the above-mentioned measurement result of the line quality.
-1 to 20-3 are divided into groups G1 and G2, for example, receiving stations 20-1 and 20-2 are divided into group G1, and receiving station 20-3 is divided into group G2. Further, the control unit 14 of the transmitting station 10 sets the grouping result by using the transmission data 30, that is, setting the station number of the receiving station in the control signal a2 and the group number in the data a3. Notify -1 to 20-3. Since this notification needs to guarantee sufficient reliability, it is continuously transmitted over a plurality of frames. Upon receiving the notification, each of the receiving stations 20-1 to 20-3 writes the corresponding group number in the group information holding unit 21.

【００２１】その後、送信局１０の制御部１４は送信デ
ータ３０の制御信号ａ2 を用いて同報データの伝送開始
を全受信局に通知し、該通知を受信した各受信局２０−
１〜２０−３はデータ伝送待ち状態となる。After that, the control unit 14 of the transmitting station 10 notifies all the receiving stations of the start of transmission of the broadcast data by using the control signal a2 of the transmitting data 30, and each receiving station 20-that has received the notification.
1 to 20-3 are in a data transmission waiting state.

【００２２】次に、送信局１０の制御部１４は伝送しよ
うとするデータに対して、データフレーム毎にその制御
信号にグループ番号を付加し、各グループＧ１及びＧ２
に対応したデータとなして、データ伝送部１３−１及び
１３−２に分配する。データ伝送部１３−１及び１３−
２はそれぞれグループＧ１及びＧ２に対応するデータを
１フレーム毎に交互に組合せて送信データ３０となし、
これを各受信局２０−１〜２０−３に送信する。Next, the control unit 14 of the transmitting station 10 adds a group number to the control signal for each data frame for the data to be transmitted, and each group G1 and G2.
And is distributed to the data transmission units 13-1 and 13-2. Data transmission units 13-1 and 13-
2, the data corresponding to the groups G1 and G2 are alternately combined for each frame to form the transmission data 30,
This is transmitted to each of the receiving stations 20-1 to 20-3.

【００２３】前記送信データ３０は各受信局２０−１〜
２０−３において、それぞれ受信データ４０−１〜４０
−３（内容は送信データ３０と同一）として受信される
ことになるが、各受信局２０−１〜２０−３のデータ抽
出部２２はそれぞれ受信データ４０−１〜４０−３から
該当するグループ対応のデータのみ、即ち受信局２０−
１，２０−２ではグループＧ１対応のデータフレームの
みを、また、受信局２０−３ではグループＧ２対応のデ
ータフレームのみを抽出し、受信する。また、この際、
正しく受信できないデータフレームがあれば、各受信局
２０−１〜２０−３の制御部２３は応答信号の制御信号
ｂ2 中に局番号又はグループ番号及び再送要求である旨
を示す情報を設定するとともに、データｂ3中にそのフ
レーム番号を設定して、これを送信する。The transmission data 30 is received by each receiving station 20-1 to 20-1.
20-3, received data 40-1 to 40
-3 (the content is the same as the transmitted data 30), the data extraction unit 22 of each of the receiving stations 20-1 to 20-3 selects the corresponding group from the received data 40-1 to 40-3. Only corresponding data, that is, the receiving station 20-
In 1 and 20-2, only the data frame corresponding to the group G1 is extracted, and in the receiving station 20-3, only the data frame corresponding to the group G2 is extracted and received. Also, at this time,
If there is a data frame that cannot be correctly received, the control unit 23 of each of the receiving stations 20-1 to 20-3 sets the station number or the group number and the information indicating the retransmission request in the control signal b2 of the response signal. , The frame number is set in the data b3, and this is transmitted.

【００２４】その後、いずれかのグループにおけるデー
タの伝送が完了したら、送信局１０は送信データ３０の
制御信号ａ2 を用いて該当グループに属する受信局に対
して、同報通信の回線の切断を通知する。After that, when the data transmission in any of the groups is completed, the transmitting station 10 uses the control signal a2 of the transmitting data 30 to notify the receiving stations belonging to the corresponding group of the disconnection of the broadcast communication line. To do.

【００２５】なお、送信データ３０及び受信データ４０
−１〜４０−３の各フレームに付された数字(1-1),(2-
1),(1-2),(2-2) 中、前方の数字はグループ番号を、ま
た、後方の数字はフレーム番号をそれぞれ示す。The transmission data 30 and the reception data 40
Numbers (1-1), (2-
In 1), (1-2), and (2-2), the number in front shows the group number and the number in the back shows the frame number.

【００２６】図５は前記システムにおける同報データの
伝送例を示すもので、図中、３１は送信データ、４１−
１，４１−２，４１−３は受信データである。なお、受
信データ４１−１〜４１−３中、斜線の入ったフレーム
は誤って受信されたデータフレームを示す。ここでは受
信データ４１−３においてフレーム番号（１）〜（３）
のデータが誤って受信され続けている、即ちグループＧ
２に属する受信局２０−３にフレーム番号（１）〜
（３）の全てのデータが誤って受信され続けているが、
受信データ４１−１及び４１−２においてフレーム番号
（１）〜（３）のデータが正しく受信されている、即ち
グループＧ１に属する受信局２０−１及び２０−２にフ
レーム番号（１）〜（３）の全てのデータが正しく受信
されているため、送信データ３１中にグループＧ１に対
応するフレーム番号（１）〜（３）のデータフレームが
繰返し送出されることはない。この結果、受信局２０−
１及び２０−２は受信局２０−３に対する送信データ、
即ちフレーム番号（１）〜（３）のデータフレームの繰
返しに拘りなく、新たなフレーム番号（４），（５），
……のデータフレームを受信することが可能となる。FIG. 5 shows an example of transmission of broadcast data in the system, in which 31 is transmission data and 41-
1, 41-2 and 41-3 are reception data. It should be noted that in the received data 41-1 to 41-3, the shaded frames indicate erroneously received data frames. Here, in the received data 41-3, frame numbers (1) to (3)
Continue to receive data in error, ie group G
The frame number (1) to the receiving station 20-3 belonging to
All the data in (3) continues to be erroneously received,
Data of frame numbers (1) to (3) are correctly received in the reception data 41-1 and 41-2, that is, the frame numbers (1) to (2) are received by the receiving stations 20-1 and 20-2 belonging to the group G1. Since all the data of 3) are correctly received, the data frames of frame numbers (1) to (3) corresponding to the group G1 are not repeatedly transmitted in the transmission data 31. As a result, the receiving station 20-
1 and 20-2 are transmission data for the receiving station 20-3,
That is, the new frame numbers (4), (5), irrespective of the repetition of the data frames of the frame numbers (1) to (3),
It becomes possible to receive the data frame of ....

【００２７】なお、前記実施例では回線品質の測定結果
に基いて各受信局をグループ分けしたが、受信局のアン
テナの種類（ヘリカルアンテナか電子追尾アンテナか
等）、所在地（照射エリアの中央か端か、海上にいるか
陸上にいるか等）、受信性能等から予めグループ分けし
ておくこともでき、また、これらと前記測定結果の両者
に基いてグループ分けすることも可能である。In the above embodiment, the receiving stations are divided into groups based on the measurement result of the line quality. However, the type of antenna of the receiving station (whether it is a helical antenna or an electronic tracking antenna), the location (whether it is the center of the irradiation area or not). It can be grouped in advance based on the reception performance, etc.), or can be grouped based on both of these and the measurement result.

【００２８】図６は本発明における同報データの他の伝
送例を示すもので、ここではグループＧ１に対してＳＲ
−ＡＲＱ方式により、また、グループＧ２に対してＳＲ
−ＡＲＱと誤り訂正とを組合せたＦＥＣ／ＡＲＱ方式に
より、同報データ伝送を行うようになした場合を示す。
即ち、図中、３２は送信データ、４２−１，４２−２，
４２−３は受信データであり、受信データ４２−１〜４
２−３中、間隔の狭い斜線の入ったフレームは誤って受
信されたデータフレームを、また、間隔の広い斜線の入
ったフレームは誤って受信されたが誤り訂正によって回
復したデータフレームを示す。FIG. 6 shows another example of transmission of broadcast data according to the present invention. Here, SR is applied to the group G1.
-SR based on ARQ and also for group G2
A case is shown in which broadcast data transmission is performed by the FEC / ARQ system that combines ARQ and error correction.
That is, in the figure, 32 is transmission data, 42-1, 42-2,
42-3 is received data, and the received data 42-1 to 4-4
In 2-3, the shaded frames with narrow spacing indicate erroneously received data frames, and the frames with wide spacing shaded indicate erroneously received data frames that have been recovered by error correction.

【００２９】本実施例はグループＧ１に属する受信局２
０−１，２０−２は回線品質が良く、ＳＲ−ＡＲＱ方式
により伝送効率の高いデータ伝送が可能であるが、グル
ープＧ２に属する受信局２０−３は回線品質が悪く、Ｓ
Ｒ−ＡＲＱ方式では充分な伝送効率が得られないので、
ＦＥＣ／ＡＲＱ方式によりデータ伝送を行うようになし
たものであり、グループＧ２に属する受信局がグループ
Ｇ１に属する受信局に影響を与えずに済むだけでなく、
グループＧ２に属する受信局に対しても効率の良いデー
タ伝送が可能となる。In this embodiment, the receiving station 2 belonging to the group G1
0-1 and 20-2 have good channel quality, and data transmission with high transmission efficiency is possible by the SR-ARQ method, but the receiving station 20-3 belonging to group G2 has poor channel quality and S
Since sufficient transmission efficiency cannot be obtained with the R-ARQ system,
The data transmission is performed by the FEC / ARQ method, so that not only the receiving station belonging to the group G2 does not affect the receiving station belonging to the group G1,
Efficient data transmission is possible even to the receiving stations belonging to the group G2.

【００３０】図７は本発明における同報データのさらに
他の伝送例を示すもので、ここではグループＧ１及びＧ
２に対してＳＲ−ＡＲＱ方式を適用するとともに、デー
タフレームの伝送はグループＧ１から行い、該グループ
Ｇ１に対する伝送が完了してからグループＧ２に対する
データフレームの伝送を行うようになした場合を示す。
即ち、図中、３３は送信データ、４３−１，４３−２，
４３−３は受信データであり、受信データ４３−１〜４
３−３中、斜線の入ったフレームは誤って受信されたデ
ータフレームを示す。FIG. 7 shows still another example of transmission of broadcast data according to the present invention. Here, groups G1 and G are used.
2 shows the case where the SR-ARQ method is applied to No. 2, the data frame is transmitted from the group G1, and the data frame is transmitted to the group G2 after the transmission to the group G1 is completed.
That is, in the figure, 33 is transmission data, 43-1, 43-2,
43-3 is received data, and the received data 43-1 to 4-4
In 3-3, the shaded frame indicates an erroneously received data frame.

【００３１】本実施例によれば、グループＧ１に対する
データの伝送中はグループＧ２に対するデータの伝送が
行われず、また、グループＧ１に属する受信局は回線品
質が良く、伝送効率の高いデータ伝送が可能であるか
ら、該グループＧ１に属する受信局２０−１，２０−２
に対するデータ伝送を、回線品質の悪いグループＧ２に
属する受信局２０−３の影響を受けることなく、極めて
短時間に完了させることができる。According to the present embodiment, the data transmission to the group G2 is not performed during the data transmission to the group G1, and the receiving stations belonging to the group G1 have good line quality and can perform the data transmission with high transmission efficiency. Therefore, the receiving stations 20-1 and 20-2 belonging to the group G1
The data transmission with respect to can be completed in an extremely short time without being affected by the receiving station 20-3 belonging to the group G2 having poor line quality.

【００３２】なお、本発明において、ＡＲＱ方式を用い
ることなく、予め各グループ毎にその回線の品質に応じ
て決めた回数だけデータを送信するようになしても良
い。また、これまでの説明では送信局と、受信局とを別
のものとして説明したが、いずれの無線局が送信局とな
るか又は受信局となるかは任意である。In the present invention, the data may be transmitted in advance for each group by the number of times determined according to the quality of the line, without using the ARQ method. Further, in the above description, the transmitting station and the receiving station are described as different units, but it is arbitrary which wireless station is the transmitting station or the receiving station.

【００３３】[0033]

【発明の効果】以上説明したように本発明の請求項１に
よれば、一の無線局から複数の他の無線局までの回線の
品質をそれぞれ測定することにより、受信側の複数の他
の無線局を回線品質毎に２以上のグループに分けること
ができ、送信側の一の無線局より受信側の複数の他の無
線局に対して該分割したグループ毎に同報データの伝送
を行うことにより、回線品質の良いグループに属する無
線局が回線品質の悪いグループに属する無線局の影響を
受けることがなく、効率の良いデータ伝送を行うことが
可能となり、また、伝送が完了したグループ毎に、順
次、該グループに属する受信側の無線局と送信側の無線
局との回線を切断することにより、回線品質の良いグル
ープに属する無線局を回線品質の悪いグループに属する
無線局よりも先に同報データの回線から開放させること
ができ、無意味に束縛することなく、他の通信を行うこ
とができる。As described above, according to claim 1 of the present invention, by measuring the quality of the line from one radio station to a plurality of other radio stations, respectively, a plurality of other radio waves on the receiving side can be measured. The wireless stations can be divided into two or more groups for each line quality, and broadcast data is transmitted from one wireless station on the transmitting side to a plurality of other wireless stations on the receiving side for each of the divided groups. As a result, wireless stations belonging to a group with good line quality will not be affected by wireless stations belonging to a group with poor line quality, and efficient data transmission will be possible. Then, by sequentially disconnecting the line between the receiving-side wireless station and the transmitting-side wireless station belonging to the group, the wireless station belonging to the group with good line quality comes before the wireless station belonging to the group with poor line quality. Same as Can be opened from the line data, meaningless without constraining, it is possible to perform other communications.

【００３４】また、本発明の請求項２によれば、同報デ
ータの伝送に先立って一の無線局から複数の他の無線局
までの回線の品質をそれぞれ測定することなく、その受
信性能、所在地等に基いて受信側の複数の他の無線局を
回線品質毎に２以上のグループに分けることができ、そ
の分、工程が簡略化され、各無線局にかかる負担が軽く
なる。Further, according to claim 2 of the present invention, the reception performance of the line from one radio station to a plurality of other radio stations is not measured before the broadcast data is transmitted. A plurality of other wireless stations on the receiving side can be divided into two or more groups for each line quality based on the location etc., and the process can be simplified and the load on each wireless station can be reduced accordingly.

【００３５】また、本発明の請求項３によれば、一の無
線局から複数の他の無線局までの回線の品質をそれぞれ
測定した結果並びにその受信性能、所在地等に基いて、
受信側の複数の他の無線局を回線品質毎に２以上のグル
ープに分けることができ、より正確なグループ分けを行
うことができる。Further, according to claim 3 of the present invention, based on the result of measuring the quality of the line from one wireless station to a plurality of other wireless stations, the receiving performance, the location, etc.,
A plurality of other wireless stations on the receiving side can be divided into two or more groups for each line quality, and more accurate grouping can be performed.

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

【図１】本発明の無線通信における同報データ伝送方法
の一実施例を示すシステム構成図FIG. 1 is a system configuration diagram showing an embodiment of a broadcast data transmission method in wireless communication according to the present invention.

【図２】従来の無線通信における同報データ伝送方法の
一例を示すシステム構成図FIG. 2 is a system configuration diagram showing an example of a conventional broadcast data transmission method in wireless communication.

【図３】図２のシステムにＳＲ−ＡＲＱ方式を適用した
場合の同報データの伝送例を示す説明図FIG. 3 is an explanatory diagram showing an example of transmission of broadcast data when the SR-ARQ method is applied to the system of FIG.

【図４】図１のシステムにおける送信データのフレーム
構成並びに受信局からの応答信号の送信タイミング及び
そのフレーム構成の一例を示す説明図4 is an explanatory diagram showing an example of a frame structure of transmission data, a transmission timing of a response signal from a receiving station, and its frame structure in the system of FIG.

【図５】図１のシステムにおける同報データの伝送例を
示す説明図5 is an explanatory diagram showing an example of transmission of broadcast data in the system of FIG.

【図６】本発明における同報データの他の伝送例を示す
説明図FIG. 6 is an explanatory diagram showing another example of transmission of broadcast data according to the present invention.

【図７】本発明における同報データのさらに他の伝送例
を示す説明図FIG. 7 is an explanatory diagram showing still another example of transmission of broadcast data according to the present invention.

【符号の説明】[Explanation of symbols]

１…通信衛星、２…照射エリア、１０…送信局、１１…
回線品質測定部、１２…グループ分割部、１３−１，１
３−２…データ伝送部、１４，２３…制御部、２０−１
〜２０−３…受信局、２１…グループ情報保持部、２２
…データ抽出部、３０，３１，３２，３３…送信デー
タ、４０−１〜４０−３，４１−１〜４１−３，４２−
１〜４２−３，４３−１〜４３−３…受信データ、５０
−１〜５０−３…応答信号、ａ1 ，ｂ1 …ユニークワー
ド、ａ2 ，ｂ2…制御信号、ａ3 ，ｂ3 …データ。1 ... Communication satellite, 2 ... Irradiation area, 10 ... Transmitting station, 11 ...
Channel quality measuring unit, 12 ... Group dividing unit, 13-1, 1
3-2 ... Data transmission section, 14, 23 ... Control section, 20-1
20-3 ... Receiving station, 21 ... Group information holding unit, 22
... Data extraction unit, 30, 31, 32, 33 ... Transmission data, 40-1 to 40-3, 41-1 to 41-3, 42-
1 to 42-3, 43-1 to 43-3 ... Received data, 50
-1 to 50-3 ... Response signal, a1, b1 ... Unique word, a2, b2 ... Control signal, a3, b3 ... Data.

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 一の無線局より複数の他の無線局に対し
て同時にデータを伝送する無線通信における同報データ
伝送方法において、 同報データの伝送に先立って、一の無線局から複数の他
の無線局までの回線の品質をそれぞれ測定し、 該測定結果に基いて複数の他の無線局を２以上のグルー
プに分割し、 一の無線局より複数の他の無線局に対して、前記グルー
プ毎に同報データの伝送を行い、 伝送が完了したグループ毎に、順次、該グループに属す
る他の無線局と一の無線局との回線を切断するようにな
したことを特徴とする無線通信における同報データ伝送
方法。1. A broadcast data transmission method in radio communication for transmitting data from one radio station to a plurality of other radio stations at the same time, wherein a plurality of radio data are transmitted from one radio station prior to the transmission of the broadcast data. The quality of the line up to other wireless stations is measured respectively, and based on the measurement result, a plurality of other wireless stations are divided into two or more groups, and from one wireless station to a plurality of other wireless stations, The broadcast data is transmitted for each group, and the line between one wireless station and another wireless station belonging to the group is sequentially disconnected for each group that has completed the transmission. Broadcast data transmission method in wireless communication. 【請求項２】 一の無線局より複数の他の無線局に対し
て同時にデータを伝送する無線通信における同報データ
伝送方法において、 複数の他の無線局をその受信性能、所在地等に基いて２
以上のグループに分割し、 一の無線局より複数の他の無線局に対して、前記グルー
プ毎に同報データの伝送を行い、 伝送が完了したグループ毎に、順次、該グループに属す
る他の無線局と一の無線局との回線を切断するようにな
したことを特徴とする無線通信における同報データ伝送
方法。2. A broadcast data transmission method in wireless communication in which data is simultaneously transmitted from one radio station to a plurality of other radio stations, wherein a plurality of other radio stations are based on their reception performance, location, etc. Two
Divide into the above groups, transmit broadcast data from one wireless station to multiple other wireless stations for each group, and for each group that has completed transmission, sequentially A broadcast data transmission method in wireless communication, characterized in that a line between a wireless station and one wireless station is disconnected. 【請求項３】 一の無線局より複数の他の無線局に対し
て同時にデータを伝送する無線通信における同報データ
伝送方法において、 同報データの伝送に先立って、一の無線局から複数の他
の無線局までの回線の品質をそれぞれ測定し、 該測定結果並びにその受信性能、所在地等に基いて複数
の他の無線局を２以上のグループに分割し、 一の無線局より複数の他の無線局に対して、前記グルー
プ毎に同報データの伝送を行い、 伝送が完了したグループ毎に、順次、該グループに属す
る他の無線局と一の無線局との回線を切断するようにな
したことを特徴とする無線通信における同報データ伝送
方法。3. A broadcast data transmission method in radio communication for transmitting data from one radio station to a plurality of other radio stations at the same time, wherein a plurality of radio data are transmitted from one radio station prior to the transmission of the broadcast data. The quality of the line up to other wireless stations is measured, and a plurality of other wireless stations are divided into two or more groups based on the measurement result, its reception performance, location, etc. The broadcast data is transmitted to each of the wireless stations for each group, and the lines between the other wireless stations belonging to the group and one wireless station are sequentially disconnected for each group for which the transmission is completed. A method for transmitting broadcast data in wireless communication, characterized by what has been done.
JP28782591A 1991-11-01 1991-11-01 Multiple address communication data transmission method for radio communication Pending JPH05130002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28782591A JPH05130002A (en) 1991-11-01 1991-11-01 Multiple address communication data transmission method for radio communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28782591A JPH05130002A (en) 1991-11-01 1991-11-01 Multiple address communication data transmission method for radio communication

Publications (1)

Publication Number Publication Date
JPH05130002A true JPH05130002A (en) 1993-05-25

Family

ID=17722254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28782591A Pending JPH05130002A (en) 1991-11-01 1991-11-01 Multiple address communication data transmission method for radio communication

Country Status (1)

Country Link
JP (1) JPH05130002A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008156034A1 (en) * 2007-06-18 2008-12-24 Sharp Kabushiki Kaisha Mobile station, mobile communication system, and communication method
US7532578B2 (en) 2002-12-06 2009-05-12 Ntt Docomo, Inc. Communication system, communication method and mobile station
US7680207B2 (en) 2002-10-04 2010-03-16 Ntt Docomo, Inc. Mobile communication system, mobile communication method, and radio station suitably used for the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7680207B2 (en) 2002-10-04 2010-03-16 Ntt Docomo, Inc. Mobile communication system, mobile communication method, and radio station suitably used for the same
US7532578B2 (en) 2002-12-06 2009-05-12 Ntt Docomo, Inc. Communication system, communication method and mobile station
WO2008156034A1 (en) * 2007-06-18 2008-12-24 Sharp Kabushiki Kaisha Mobile station, mobile communication system, and communication method

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