Flow control method based on window prediction

Abstract

The invention discloses a flow control method based on window prediction, which comprises the following steps: 1) in the stage of establishing TCP (Transmission Control Protocol) connection, a sendingend and a receiving end negotiate the window size, and meanwhile, the receiving end reserves a data buffer area; 2) the sending end sends a data byte stream conforming to the window size according tothe negotiation result, and waits for confirmation of the receiving end; 3) the sending end substitutes the size of the remaining receiving window in the confirmation information which is just returned and the size of the remaining receiving window predicted last time into a formula (4); 4) the size of the residual receiving window predicted this time is calculated through a formula (4), and thesending rate of the sending end is adjusted according to the size of the residual receiving window, so that the deviation between the return value of the size of the receiving window adopted by the sending end and the actually matched numerical value is reduced; and 5) the step 3) is repeated until the communication is finished, and the connection is closed to realize the flow control of the sizeof the receiving window. The TCP communication efficiency is improved, and the reasonable utilization of resources is ensured.

Description

technical field [0001] The invention belongs to the technical field of network communication, and specifically relates to a flow control method based on window prediction. In the method, the sending speed of the sending end is matched with the speed of processing data at the receiving end, which reduces the return of the size of the receiving window adopted by the sending end. The deviation of the value from the actual value that should match. Background technique [0002] TCP is a connection-oriented, reliable, and byte-stream-based transport layer communication protocol. The TCP / IP protocol family is the foundation of the current Internet. Most systems in the current network use the TCP protocol for transmission. The application layer sends a data stream represented by 8-bit bytes for inter-network transmission to the TCP layer, and then TCP divides the data stream into segments of appropriate length (usually determined by the data link layer of the network to which the co...

AI Technical Summary

Problems solved by technology

[0005] 1. Waste resources, increase the number of communications, and reduce the success rate of TCP communications

When the remaining receive window W n-1 >W n , it will cause the sending end to send too fast, so that the amount of data sent is greater than the real-time accurate remaining receiving window size, which will cause packet loss at the transport layer, resulting in waste of resources and affecting TCP communication efficiency;

[0006] 2. Cannot make full use of the space in the buffer area, reducing the efficiency of TCP communication

When the remaining receive window W n-1 n When the amount of data sent is too small, the buffer area will be relatively idle, reducing the communication efficiency of TCP.

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