JPH05219056A - Multi-address communication system - Google Patents
Multi-address communication systemInfo
- Publication number
- JPH05219056A JPH05219056A JP4018017A JP1801792A JPH05219056A JP H05219056 A JPH05219056 A JP H05219056A JP 4018017 A JP4018017 A JP 4018017A JP 1801792 A JP1801792 A JP 1801792A JP H05219056 A JPH05219056 A JP H05219056A
- Authority
- JP
- Japan
- Prior art keywords
- unreceived
- data
- station
- stations
- broadcast
- 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
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/65—Transmission of management data between client and server
- H04N21/658—Transmission by the client directed to the server
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/637—Control signals issued by the client directed to the server or network components
- H04N21/6377—Control signals issued by the client directed to the server or network components directed to server
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、データ通信での同報通
信方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast communication system for data communication.
【０００２】[0002]
【従来の技術】従来の同報通信方式では、各パケットの
送達確認を受信局からのアクノーレッジにより行なって
いる。しかし、同報通信の受信局の中には、通信を開始
できない局が存在したり、通信の途中で何らかの障害に
より受信が不可能になってしまう局がある。この様に、
必ずしも同報通信時に受信局全てが正常に受信できる状
態にあるとは限らない。2. Description of the Related Art In a conventional broadcast communication system, delivery confirmation of each packet is confirmed by an acknowledge from a receiving station. However, among the receiving stations of the broadcast communication, there are some stations that cannot start the communication, and some stations cannot receive due to some trouble during the communication. Like this
Not all receiving stations are normally in a state of being able to receive normally during broadcast communication.
【０００３】[0003]
【発明が解決しようとする課題】しかし従来の同報通信
方式では、上述のような正常に受信できなかった受信局
を管理し、その受信局に対するデータ送達を保証するた
めの手段が、何も設けられていないという問題点があ
る。However, in the conventional broadcast communication system, there is no means for managing the receiving station which could not be normally received as described above and guaranteeing the data delivery to the receiving station. There is a problem that it is not provided.
【０００４】[0004]
【課題を解決するための手段】本発明の同報通信方式
は、送信局と複数の受信局とが同時通信可能な通信回線
で接続されており前記送信局から複数の前記受信局に回
線設定し同報でデータを送る同報通信手段と、該同報通
信手段により送られたデータの送達確認を行う送達確認
手段と、該送達確認の成否に応じて未受信の前記受信局
との間で再度回線設定し未受信データを再送信する再送
手段とを備えている。In the broadcast communication system of the present invention, a transmitting station and a plurality of receiving stations are connected by a communication line capable of simultaneous communication, and the transmitting station sets a line to the plurality of receiving stations. Between the broadcast communication means for sending the data by the broadcast, the delivery confirmation means for confirming the delivery of the data sent by the broadcast communication means, and the unreceived receiving station according to the success or failure of the delivery confirmation. And a retransmission means for re-establishing the line and retransmitting unreceived data.
【０００５】[0005]
【作用】図１は本発明の動作を実現するための構成例を
示し、図２には図１の構成におけるプロトコルシーケン
スを例示する。図１における送信局１の送信制御部１１
及び受信局２、３の受信制御部２１、３１の間で取り交
わされる通信手順を図２を用いて順に説明する。FIG. 1 shows an example of a structure for realizing the operation of the present invention, and FIG. 2 illustrates a protocol sequence in the structure of FIG. The transmission control unit 11 of the transmission station 1 in FIG.
A communication procedure exchanged between the reception control units 21 and 31 of the reception stations 2 and 3 will be sequentially described with reference to FIG.
【０００６】送信局１のデータ発生部１３において同報
データが発生すると、送信制御部１１からそのデータを
同報通信用の通信回線４で受信局２、３に向けて送信す
る。この時、送信局１では、送信したデータを記憶装置
１２に記憶させる。また、受信局２、３では、受信制御
部２１、３１により同報データを受信し、記憶装置２
２、３２に格納する。同報送信によりデータを送信した
後、送信局１は受信局２、３との間で送達確認を行う。When the broadcast data is generated in the data generation unit 13 of the transmission station 1, the transmission control unit 11 transmits the data to the reception stations 2 and 3 through the communication line 4 for broadcast communication. At this time, the transmitting station 1 stores the transmitted data in the storage device 12. In the receiving stations 2 and 3, the reception control units 21 and 31 receive the broadcast data, and the storage device 2
It is stored in 2, 32. After transmitting the data by the broadcast transmission, the transmitting station 1 confirms the delivery with the receiving stations 2 and 3.
【０００７】この送達確認は、送信制御部１１と受信制
御部２１、３１との間でそれぞれの記憶装置１２、２
２、３２に記憶されているデータを照合することにより
行われる。その結果、送信制御部１１と受信制御部２
１、３１との間で未受信データの有無を確認することが
できる。This delivery confirmation is performed between the transmission control unit 11 and the reception control units 21 and 31 in the respective storage devices 12 and 2.
This is carried out by collating the data stored in Nos. 2 and 32. As a result, the transmission control unit 11 and the reception control unit 2
The presence or absence of unreceived data can be confirmed between 1 and 31.
【０００８】送達確認により、例えば受信局２にて未受
信データがあったとすると、送信局１の送信制御部１１
と受信局２の受信制御部２１との間に再度通信回線４の
接続を設定し、その未受信データを送信局１の記憶装置
１２から取り出し、通信回線４を通して受信局２へ再送
信する。受信局２の受信制御部２１は、その未受信デー
タを受信すると自局の記憶装置２２へ格納する。Assuming that there is unreceived data in the receiving station 2 by the delivery confirmation, the transmission control unit 11 of the transmitting station 1
Then, the connection of the communication line 4 is set up again between the reception control unit 21 of the receiving station 2 and the unreceived data is taken out from the storage device 12 of the transmitting station 1 and retransmitted to the receiving station 2 through the communication line 4. Upon receiving the unreceived data, the reception control unit 21 of the receiving station 2 stores it in the storage device 22 of its own station.
【０００９】[0009]
【実施例】次に本発明について図面を参照して説明す
る。The present invention will be described below with reference to the drawings.
【００１０】図１は本発明の第１の実施例のブロック
図、図２は本実施例の通信時のシーケンス図を示す。本
実施例は、ニュース記事を同報配布する方式である。同
報通信可能な通信回線４としては、１つの周波数帯を分
割多重しながら共有して使用する無線回線を用いてい
る。ニュース記事が発生すると、ニュース記事を識別す
るためのヘッダをヘッダ作成部１４で作成する。ヘッダ
は、そのニュース記事を他のニュース記事と区別するた
めの情報であり、本実施例では、ヘッダとして、記事の
発生時刻（年、月、日、時、分、秒）およびその発生元
を表示した情報を用いている。ヘッダを付加されたニュ
ース記事の情報は、送信制御部１１から各受信局２、３
に、同報用の通信回線４を用いて同報配布する。また、
ニュース記事は記憶装置１２に格納され、ヘッダは格納
したニュース記事との対応を確保しつつヘッダ記憶装置
１５に格納される。受信局２、３はそれぞれ、もし配布
されたニュース記事を受信したならば、それを記憶装置
２２、２３に格納する。同報配布が終了した後、送信制
御部１１と受信制御部２１、３１との間では送達の確認
が行われる。この送達確認は、送信側と受信側とのヘッ
ダの比較対照により行なわれる。すなわち、送信制御部
１１ではヘッダ記憶装置１５からヘッダを取り出し、受
信局２、３の受信制御部２１、３１がヘッダ記憶装置２
３、３３から取り出して返送したヘッダと比較確認す
る。その両者の不一致が検出されると、送信制御部１１
は、未受信局に対しまとめて通信回線４を通じてその未
受信ニュース記事を再送する。そして、全受信局への配
布が終了すると、そのニュース記事を送信側の記憶装置
１２から削除する。もし、ニュース記事を再送しても未
受信局が残っている場合には、そのニュース記事を記憶
装置１２から削除せず、例えば定期的な周期で上述の送
達確認と再送とを繰り返し行なって、全受信局にニュー
ス記事を配布する。ヘッダ記憶装置１５でも、全局配送
済みのニュース記事に対応するヘッダは消去するが、不
完全配送データのものはどの受信局との間で送達確認が
とれていないかを示す情報と共に保持する。この実施例
の方式を用いれば、社内ニュース等を各支店にもれ無く
効率よく配布できる。FIG. 1 is a block diagram of a first embodiment of the present invention, and FIG. 2 is a sequence diagram at the time of communication of this embodiment. In this embodiment, a news article is broadcasted. As the communication line 4 capable of broadcast communication, a wireless line that is shared and used while dividing and multiplexing one frequency band is used. When a news article occurs, the header creation unit 14 creates a header for identifying the news article. The header is information for distinguishing the news article from other news articles, and in the present embodiment, the occurrence time (year, month, day, hour, minute, second) of the article and its origin are used as the header. It uses the displayed information. The information of the news article added with the header is transmitted from the transmission control unit 11 to the receiving stations 2, 3
Broadcast using the communication line 4 for broadcast. Also,
The news article is stored in the storage device 12, and the header is stored in the header storage device 15 while ensuring the correspondence with the stored news article. Receiving stations 2 and 3, respectively, store the distributed news articles in storage devices 22 and 23 if they have been received. After the broadcast distribution is completed, delivery confirmation is performed between the transmission control unit 11 and the reception control units 21 and 31. This delivery confirmation is performed by comparing and comparing the headers of the transmitting side and the receiving side. That is, the transmission control unit 11 extracts the header from the header storage device 15, and the reception control units 21 and 31 of the receiving stations 2 and 3 receive the header storage device 2.
It is compared and confirmed with the headers extracted from 3 and 33 and returned. When a mismatch between the two is detected, the transmission control unit 11
Retransmits the unreceived news articles collectively to the unreceived stations through the communication line 4. Then, when the distribution to all the receiving stations is completed, the news article is deleted from the storage device 12 on the transmitting side. If the news article is retransmitted and some unreceived stations remain, the news article is not deleted from the storage device 12, and, for example, the above-described delivery confirmation and retransmission are repeated at regular intervals, Distribute news articles to all receiving stations. The header storage device 15 also deletes the header corresponding to the news article that has been delivered to all stations, but retains the incomplete delivery data together with the information indicating to which receiving station the delivery confirmation has not been taken. By using the method of this embodiment, it is possible to efficiently distribute company news and the like to each branch.
【００１１】図３は本発明の第２の実施例のシーケンス
図である。第１の実施例では、同報配布後に未受信局が
あった時に、その未受信局へまとめて同報再送するが、
本実施例では、同報配布後に未受信局があった時に、そ
の未受信局の１局ずつに同報を個別再送する。例えば図
１において、受信局２、３の双方に未受信データがある
と、送信局１はまず受信局２に対してその未受信データ
を再送し、この再送の送達確認後、受信局３に対しその
未受信データを再送する。FIG. 3 is a sequence diagram of the second embodiment of the present invention. In the first embodiment, when there is an unreceived station after the broadcast distribution, the broadcast is collectively retransmitted to the unreceived station.
In this embodiment, when there is an unreceived station after the broadcast distribution, the broadcast is individually retransmitted to each of the unreceived stations. For example, in FIG. 1, if there is unreceived data in both the receiving stations 2 and 3, the transmitting station 1 first retransmits the unreceived data to the receiving station 2, and after confirming the delivery of this retransmission, the transmitting station 1 On the other hand, the unreceived data is retransmitted.
【００１２】図４は本発明の第３の実施例のシーケンス
図である。本実施例では、複数の受信局２〜Ｎ（Ｎは正
整数）に対する同報配布後に未受信局があった場合、そ
の未受信局に対し一括しまとめて同報再送するか、ある
いは未受信局に１局ずつ個別に同報再送するかを、未受
信局数の多少に応じて選択するようにしている。すなわ
ち、一括同報再送から個別同報再正へ移行する未受信局
数を指示するためのしきい値を予め設定しておき、未受
信局数がこのしきい値以上であれば一括同報再送し、未
受信局数がしきい値よりも少くなれば個別同報再送す
る。FIG. 4 is a sequence diagram of the third embodiment of the present invention. In the present embodiment, when there is an unreceived station after the broadcast distribution to a plurality of receiving stations 2 to N (N is a positive integer), the unreceived stations are collectively retransmitted or the unreceived stations are received. Whether to retransmit the broadcast to each station individually is selected according to the number of unreceived stations. That is, a threshold value is set in advance for instructing the number of unreceived stations to shift from collective broadcast retransmission to individual broadcast re-correction. Retransmit, and if the number of unreceived stations is less than the threshold value, individual broadcast retransmission is performed.
【００１３】本実施例では、同報配布時および同報再送
時に未受信局が発生する予測確率と、通信回線４の使用
料金体系とを勘案して上述のしきい値を適宜に設定して
おけば、再送を見込んだ同報通信コストを最小化できる
という利点がある。In the present embodiment, the above-mentioned threshold value is appropriately set in consideration of the predicted probability that an unreceived station will occur at the time of broadcast distribution and at the time of broadcast retransmission, and the usage charge system of the communication line 4. If this is done, there is an advantage that the broadcast communication cost that anticipates retransmission can be minimized.
【００１４】[0014]
【発明の効果】本発明によれば、１回の同報通信時に同
報受信局すべてにデータを送達できなくても、未受信局
に対しデータを再送して、最終的に全受信局に対するデ
ータ送達を保証できる。According to the present invention, even if the data cannot be delivered to all the broadcast receiving stations during one broadcast communication, the data is retransmitted to the unreceived stations and finally to all the receiving stations. Data delivery can be guaranteed.
【図１】本発明の実施例のブロック図。FIG. 1 is a block diagram of an embodiment of the present invention.
【図２】本発明の第１の実施例のシーケンス図。FIG. 2 is a sequence diagram of the first embodiment of the present invention.
【図３】本発明の第２の実施例のシーケンス図。FIG. 3 is a sequence diagram of a second embodiment of the present invention.
【図４】本発明の第３の実施例のシーケンス図。FIG. 4 is a sequence diagram of a third embodiment of the present invention.
１ 送信局 ２，３ 受信局 ４ 通信回線 １１ 送信制御部 １２，２２，３２ 記憶装置 １３ データ発生部 １４ ヘッダ作成部 １５，２３，３３ ヘッダ記憶装置 DESCRIPTION OF SYMBOLS 1 transmitting station 2, 3 receiving station 4 communication line 11 transmission control part 12, 22, 32 storage device 13 data generation part 14 header creation part 15, 23, 33 header storage device
Claims (4)
な通信回線で接続されており前記送信局から複数の前記
受信局に回線設定し同報でデータを送る同報通信手段
と、該同報通信手段により送られたデータの送達確認を
行う送達確認手段と、該送達確認の成否に応じて未受信
の前記受信局との間で再度回線設定し未受信データを再
送信する再送手段とを備えていることを特徴とする同報
通信方式。1. A broadcast communication means in which a transmitter station and a plurality of receiver stations are connected by a communication line capable of simultaneous communication, and the transmitter station sets a line to the plurality of receiver stations and sends data by broadcast. Retransmission for re-transmitting unreceived data by setting a line again between the delivery confirmation means for confirming the delivery of the data sent by the broadcast communication means and the receiving station which has not received yet according to the success or failure of the delivery confirmation. A broadcast communication method comprising means.
て前記未受信データを再送信する請求項１記載の同報通
信方式。2. The broadcast communication system according to claim 1, wherein the retransmitting means collectively retransmits the unreceived data to all the unreceived stations.
に前記未受信データを再送信する請求項１記載の同報通
信方式。3. The broadcast communication system according to claim 1, wherein the retransmitting means retransmits the unreceived data individually for each unreceived station.
したしきい値以上の場合にはその未受信局すべてに一括
して前記未受信データを再送信し、未受信局数が該しき
い値未満の場合にはその未受信局の１局ずつ個別に前記
未受信データを再送信する請求項１記載の同報通信方
式。4. The retransmitting means retransmits the unreceived data to all the unreceived stations collectively when the number of unreceived stations is equal to or more than a preset threshold value, 2. The broadcast communication system according to claim 1, wherein if the threshold value is less than the threshold value, the unreceived data is retransmitted individually for each of the unreceived stations.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4018017A JPH05219056A (en) | 1992-02-04 | 1992-02-04 | Multi-address communication system |
| CA002088753A CA2088753C (en) | 1992-02-04 | 1993-02-03 | Point-to-multipoint communication network capable of retransmitting a multicast signal |
| US08/012,931 US5457808A (en) | 1992-02-04 | 1993-02-03 | Point-to-multipoint communication network capable of retransmitting a multicast signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4018017A JPH05219056A (en) | 1992-02-04 | 1992-02-04 | Multi-address communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05219056A true JPH05219056A (en) | 1993-08-27 |
Family
ID=11959905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4018017A Pending JPH05219056A (en) | 1992-02-04 | 1992-02-04 | Multi-address communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05219056A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0763944A2 (en) * | 1995-09-18 | 1997-03-19 | Oki Electric Industry Company, Limited | Video coder, decoder and transmission system |
| JPH1032573A (en) * | 1996-03-18 | 1998-02-03 | Toshiba Corp | Receiving protocol equipment, multi-address message transmitter and transmission and reception protocol equipment |
| JPH11187017A (en) * | 1997-12-22 | 1999-07-09 | Nri & Ncc Co Ltd | System and mehtod for simultaneously distributing omitted data to plural stations for reforming automatic recovery processing |
| JP2000259534A (en) * | 1999-03-04 | 2000-09-22 | Toshiba Corp | Transmission equipment, transmission method, recording medium recording software for transmission and communication system |
| JP2003534676A (en) * | 1999-12-30 | 2003-11-18 | トムソン ライセンシング ソシエテ アノニム | How to download data that follows an information signal |
| JP2007318252A (en) * | 2006-05-23 | 2007-12-06 | Ntt Docomo Inc | Arrival confirmation type broadcast distribution method, mobile terminal, and broadcast distribution server |
| US7339954B2 (en) | 2001-04-25 | 2008-03-04 | Nec Electronics Corporation | Multiplexing digital broadcast method that can establish a technique which can perfectly obtain a multiplexing digital broadcast data |
| US7594152B2 (en) | 2004-01-09 | 2009-09-22 | Lg Electronics Inc. | Repairing errors in data of MBMS service |
| US7599294B2 (en) | 2004-02-13 | 2009-10-06 | Nokia Corporation | Identification and re-transmission of missing parts |
| US7606226B2 (en) | 2002-06-22 | 2009-10-20 | Lg Electronics Inc. | Multimedia service providing method and radio mobile communication system |
| US7623887B2 (en) | 2002-05-18 | 2009-11-24 | Lg Electronics Inc. | Selective service method in multicast system |
| JP2014146069A (en) * | 2013-01-25 | 2014-08-14 | Sanden Corp | Control device of vending machine |
| JP2014534760A (en) * | 2011-10-31 | 2014-12-18 | フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン | Apparatus and method for transmitting a message to a plurality of receivers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60190050A (en) * | 1984-03-12 | 1985-09-27 | Hitachi Ltd | Transmission system |
| JPS63146635A (en) * | 1986-12-10 | 1988-06-18 | Fujitsu Ltd | Data link control system |
-
1992
- 1992-02-04 JP JP4018017A patent/JPH05219056A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60190050A (en) * | 1984-03-12 | 1985-09-27 | Hitachi Ltd | Transmission system |
| JPS63146635A (en) * | 1986-12-10 | 1988-06-18 | Fujitsu Ltd | Data link control system |
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