TCP parameter adjusting method applicable to wireless self-organized network

Abstract

The invention belongs to the technical field of network communication, relating to a TCP parameter adjusting method applicable to a wireless self-organized network, wherein the method comprises the steps of adjusting the size of a congestion window, slow starting a threshold value and a RTO value. The method specifically comprises the steps: by adopting a cross-layer mechanism, differentiating a movable lost package from non-movable lost package at a link layer zone, and feeding back a judging result to a network layer; expanding a routing protocol at the a network layer, transmitting a package lost reason hop by hop, and transmitting expanded TCMP control information to a TCP layer; and at the TCP layer, according to the judging result and the ICMP control information of the package lostreason, adjusting a TCP congestion mechanism and corresponding status parameters to enter into different running status. The method improves the congestion control performance of the TCP, and is applicable to a wireless Ad Hoc network with an AODV routing protocol. The method is taken as an effective and practical technical scheme, thereby having good application foreground.

Description

technical field [0001] The present invention generally relates to the technical field of network communication, and more specifically relates to a TCP parameter adjustment method based on a cross-layer mechanism on a wireless self-organizing network (Ad Hoc). Background technique [0002] The wireless Ad hoc network is a wireless mobile communication network composed of a group of mobile nodes with transceiver devices. When they are not within the communication range of each other, other nodes must be used as routers to forward data packets and establish connections through multi-hops. Therefore, the mobile terminal is required not only to have the function of a host, but also to forward data packets as a router. [0003] The TCP protocol is designed for traditional wired networks. Due to the characteristics of wireless Ad hoc networks, routing failures caused by node movement, bit errors in wireless channels, signal attenuation and interference, competition in shared chann...

AI Technical Summary

Problems solved by technology

[0005] The existing TCP improvement schemes under the wireless Ad hoc network can be summarized into the following categories according to the problems they are committed to solving: 1) TCP performance degradation caused by frequent node movement and routing failure; 2) On-demand routing protocol errors caused by network congestion 3) The serious unfairness of TCP caused by the characteristics of the Ad hoc network environment itself; 4) The competition and sharing of wireless channels caused the lower bandwidth delay product of the Ad hoc network TCP performance drops

At present, most of the solutions are improved for one of the problems, and the effect is not very satisfactory, the accuracy of the prediction of the current network congestion and the judgment of the network status is not high

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