Data transmission method based on UDP (user datagram protocol)

Abstract

The invention provides a data transmission method based on a UDP (user datagram protocol). The data transmission method comprises the following steps: identifying a network state through end-to-end characteristics of the UDP; calculating a plurality of measuring parameters; transmitting calculated results to an identifying module of a receiving end; after the identifying module identifies the network state, identifying through 3-bit data, modifying an ACK (acknowledgement character) reply packet UDP prelude, and noticing identified results to a sending end; when the sending end detects the ACK reply packet and if the network state is found to be a normal condition, regulating the size of a delay window in the self-adaptive manner according to routing hop count through a sending control module; when a network router has changes or is interrupted, re-calculating a value of a state variable and keeping consistency of load rates before and after connecting the UDP. According to the data transmission method disclosed by the invention, the sending end regulates the data sending rate in the self-adaptive manner according to available resources of existing UDP connection, and reduces jam possibility of burst traffic.

Description

technical field [0001] The invention relates to network communication, in particular to a UDP-based data transmission method. Background technique [0002] The wireless ad hoc network is an ad hoc system composed of multiple mobile nodes. Each node is both a host and a router. It does not have a fixed communication infrastructure such as a base station. It can quickly build a communication platform and provide a communication support environment. With high survivability and flexibility, the UDP protocol is designed for fixed wired networks and provides end-to-end data packet transmission services between the sender and receiver. The traditional UDP congestion control algorithm uses packet loss as the basis for congestion judgment. However, in an ad hoc network, in addition to congestion and packet loss, other factors such as high bit error rate, routing failure, and unfairness of channel access are also important factors. It can cause the loss of data packets. The data pack...

AI Technical Summary

Problems solved by technology

The traditional UDP congestion control algorithm uses packet loss as the basis for congestion judgment. However, in an ad hoc network, in addition to congestion and packet loss, other factors such as high bit error rate, routing failure, and unfairness of channel access are also important factors. It can cause the loss of data packets. The data packet loss caused by non-congestion accounts for more than 80%, but it triggers the traditional UDP congestion control, which reduces the delay window, which will inevitably lead to a serious decline in UDP performance.

[0003] Therefore, for the above-mentioned problems existing in related technologies, effective solutions have not yet been proposed

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