JPH04367135A - Data transfer confirmation system - Google Patents

Abstract

PURPOSE:To reduce the burden by making a transmission request to one frame, preparing a positive response broadcast frame, and performing the broadcast transmission to a client. CONSTITUTION:A server 12 receives data almost simultaneously. A data transmitter-receiver 21 passes the frame of the received data to a server reception frame analysis part 22 at the same time. An analysis part 22 analyzes the data and requests the transmission request of the positive response ACK of each data to an ACK broadcast frame preparation part 24. The preparation part 24 makes the ACK against each data to one frame and requests the broadcast transmission against the transmitter-receiver 21. Then the transmitter- receiver 21 performs the broadcast transmission of the ACK broadcast frame to a client 11. Then the transmitter-receiver 21 reports the received ACK broadcast frame to an analysis part 17, and a data transmission confirmation part 18 confirms that the data is the requested one, resulting in reducing the burden necessary for response processing.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data delivery confirmation system for confirming data delivery, and more particularly to a data delivery confirmation system in a local area network capable of broadcast transmission.

0002

[Prior art] LAN (local area network)
The print server, mail server, or
Various servers such as computers can be connected. In such a network system, a plurality of clients including computers and workstations may successively transmit data to the same server. Therefore, the server side confirms that the data has been delivered by sending an acknowledgment (abbreviated as ACK) to each client that has sent the data.

0003

However, in such a conventional data delivery confirmation system, when the number of clients increases and the amount of data received from each client at the server increases, the computer on the server side becomes unable to receive the data. I was forced to deal with processing and ACK processing for reception. In other words, a problem occurred in that the server's primary job of responding to requests from clients became slow.

SUMMARY OF THE INVENTION An object of the present invention is to provide a data delivery confirmation system that can reduce the burden required for ACK processing.

[0005]

[Means for solving the problem] In the invention according to claim 1,

That is, in the invention as claimed in claim 1, there is provided a transmission data frame creation section that creates a data frame to be transmitted from the client to the server, and a server that analyzes the data frame transmitted from the client and requests transmission of an acknowledgment. A reception frame analysis unit and a server system that creates an acknowledgment broadcast frame that combines multiple acknowledgment transmission requests requested by the server reception frame analysis unit as one frame and broadcasts it to the client. The data delivery confirmation system is equipped with a report transmitter.

That is, in the data delivery confirmation system according to claim 1, instead of individually transmitting acknowledgment responses, several acknowledgments are combined into one frame and broadcast transmission is performed. , and the occupancy rate required for transmission processing.

[0008] In the invention as claimed in claim 2, there is provided a transmission data frame creation unit that creates a data frame to be transmitted from the client to the server, and a server reception unit that analyzes the data frame transmitted from the client and requests transmission of an acknowledgment. An acknowledgment broadcast frame in which a frame analysis unit and this server received frame analysis unit create an acknowledgment broadcast frame in which multiple acknowledgment transmission requests requested by this server are combined into one frame, and issue a broadcast transmission request. a creation unit, a client reception frame analysis unit that analyzes the acknowledgment broadcast frame broadcast from the server and notifies that an acknowledgment has been received, and an acknowledgment notification notified by the client reception frame analysis unit. The data delivery confirmation system is provided with a data delivery confirmation unit that analyzes the data frame and confirms that it is an acknowledgment of a previously received data frame.

In other words, in the data delivery confirmation system according to claim 2, several acknowledgments, which have been sent individually, are combined into one frame for broadcast transmission, and the client side It parses the received frame and verifies that the data was reliably delivered by checking that the acknowledgment is an acknowledgment of a previously received data frame.

[0010] In one aspect of this data delivery confirmation system, as described in claim 3, the server and client are composed of computers, and these are connected via a local area network.

[0011]

EXAMPLES The present invention will be explained in detail with reference to Examples below.

FIG. 1 shows a part of a data delivery confirmation system according to an embodiment of the present invention. As shown in this figure, a client 11 and a server 12 are configured to transmit and receive data via a local area network 13. The client 11 includes a data transmission request unit 14 that makes a data transmission request, a transmission data frame creation unit 15 that creates a transmission data frame based on this request, and a transmission data frame creation unit 15 that sends a transmission data frame or receives data sent from the server 12. When the data transmitting/receiving device 16 receives the frame addressed to the own station, the client received frame analysis section 17 analyzes the received frame, and the client received frame analysis section 17 analyzes the frame as an ACK broadcast frame. is equipped with a data delivery confirmation unit 18 that receives notification that ACK has been received. The data delivery confirmation unit 18 analyzes this notified ACK, and if it confirms that it is an ACK of a previously transmitted data frame, it notifies the data transmission request unit 14 that the data has been successfully delivered. It is supposed to be done.

The server 12 side is also equipped with a data transmitting/receiving device 21 connected to the local area network 13. The server received frame analysis unit 22 analyzes the frame received on the server side, and if it is a data frame, passes the data to the received data processing unit 23 to process the received data. Then, an ACK transmission request is made to the ACK broadcast frame creation section 24. The ACK broadcast frame creation unit 24 receives multiple A requests from the server received frame analysis unit 22.
The CK transmission requests are combined into one frame to create an ACK broadcast frame. The ACK broadcast frame creation unit 24 requests the data transmitting/receiving device 21 to broadcast the ACK broadcast frame.

FIG. 2 is a diagram for explaining the operation of the data delivery confirmation system having such a circuit configuration. In this figure, it is assumed that three clients 11A to 11C, each consisting of a computer, issue data transmission requests to a specific server 12 via the local area network 13 at approximately the same time. At this time, the data transmission request unit 14 in the three clients 11A to 11C,
A data transmission request is made to each transmission data frame creation unit 15.

[0015] Upon receiving the data transmission request, each transmission data frame creation section 15 creates a transmission data frame for the server 12, and requests each data transmission/reception device 16 to transmit the data frame. The data transmitting/receiving devices 16 of each of the clients 11A to 11C that received this request transmit data frames to the server 12 via the local area network 13 at approximately the same time.

These three clients 11A to 11C
The data transmitted by the following will be referred to as data A, data B, and data C, respectively. The server 12 stores these data A
, data B and data C almost simultaneously. Therefore, the data transmitting/receiving device 21 of the server 12 transmits these three received data A, data B, and data C.
frames are simultaneously passed to the server received frame analysis unit 22. The server received frame analysis unit 22 analyzes these three frames of data A, data B, and data C, and passes the three received data A, data B, and data C to the received data processing unit 23. At the same time, the server received frame analysis unit 22 analyzes three data A and data B.
and requests the ACK broadcast frame creation unit 24 to send an ACK for data C.

[0017] The ACK broadcast frame creation unit 24 generates a
An ACK broadcast frame is created in which CKs are combined into one frame. Then, a request for broadcast transmission is made to the data transmitting/receiving device 21. The data transmitting/receiving device 21 broadcasts this ACK broadcast frame to the three clients 11A to 11C via the local area network 13. Each data transmitting/receiving device 16 of each client 11A to 11C notifies each client received frame analysis unit 17 of the received ACK synchronization frame.

In the client 11A that has been notified of the ACK broadcast frame, its client received frame analysis unit 17 notifies the data delivery confirmation unit 18 of the ACK information for the client 11A that is present in the ACK broadcast frame. Similarly, the other two clients 11B and 11
Each client received frame analysis unit 17 in C also notifies each data delivery confirmation unit 18 of the ACK information for its own station present in the ACK broadcast frame. In this way, the three clients 11A to 11
Each data delivery confirmation unit 18 in C confirms that the ACK is for the data requested to be transmitted by each data transmission request unit 14, and confirms that the data has been successfully delivered to each data transmission request unit 14. We will notify you that this has been done.

[0019]

[Effects of the Invention] As explained above, according to the present invention, an acknowledgment broadcast frame is created in which multiple acknowledgment responses are combined into one frame, and this is broadcasted. The greater the burden required to send the acknowledgment, the greater the reduction rate of that burden, which has the effect of allowing the server side to devote sufficient time to its original work.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing essential parts of a data delivery confirmation system in an embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining the operation of the data delivery confirmation system of this embodiment.

[Explanation of symbols]

11 Client 12 Server 13 Local area network 14 Data transmission request section 17 Client received frame analysis section 22 Server received frame analysis section 24 ACK broadcast frame creation section

Claims (3)

[Claims] [Claim 1] A transmission data frame creation unit that creates a data frame to be transmitted from a client to a server;
A server received frame analysis unit that analyzes data frames sent from the client and requests transmission of acknowledgments, and combines multiple acknowledgment transmission requests requested by this server reception frame analysis unit into one frame. 1. A data delivery confirmation system, comprising: a broadcast transmitting unit that creates an acknowledgment broadcast frame and broadcasts it to clients. [Claim 2] A transmission data frame creation unit that creates a data frame to be transmitted from the client to the server;
A server received frame analysis unit that analyzes data frames sent from the client and requests transmission of acknowledgments, and combines multiple acknowledgment transmission requests requested by this server reception frame analysis unit into one frame. An acknowledgment broadcast frame creation unit that creates an acknowledgment broadcast frame and requests broadcast transmission, and an acknowledgment broadcast frame generator that analyzes the acknowledgment broadcast frame broadcast from the server and notifies that an acknowledgment has been received. and a data delivery confirmation unit that analyzes the acknowledgment notified by the client reception frame analysis unit and confirms that it is an acknowledgment of a previously received data frame. A data delivery confirmation system featuring: 3. The data delivery confirmation system according to claim 1, wherein the server and the client are computers, and are connected via a local area network.