Design of Reliable Parallel Transmission System in Complex Heterogeneous Network

Abstract

AbstractToday’s terminal equipment is often equipped with multiple network interfaces, and the traditional TCP/IP protocol can only transmit data using a single network interface and cannot take advantage of the network environment where multiple heterogeneous networks coexist today [1]. The multi-channel parallel transmission technology emerging in recent years can use multiple wireless network interfaces to transmit data in parallel, to make full use of heterogeneous network resources for reliable transmission, which is an important means to improve network quality. At present, there are two mainstream protocols for multi-path parallel transmission technology, MPTCP and SCTP [2, 3]. Although both protocols can use multiple wireless links to transmit data, they do not perform well in the actual use scenarios of complex heterogeneous networks. Reliable transmission cannot be completed in mobile and high packet loss rate scenarios, and because the two are not widely integrated into the TCP/IP protocol stack, there are problems such as deployment difficulties. In order to achieve reliable transmission in scenarios with severe network fluctuations, we have designed a multi-channel parallel transmission system to achieve reliable transmission in different scenarios. In terms of scheduling algorithm, we design a mechanism that can adaptively switch scheduling schemes according to transmission scenarios. In terms of cache sorting, we have designed a reasonable cache mechanism, which can well alleviate the drop in the sending rate caused by the disorder of the receiving end. According to the test results, the system can achieve reliable transmission in different transmission environments.KeywordsParallel transmissionBandwidth fluctuationTransmission scheduling