Congestion control method based on bandwidth prediction in civil aviation satellite communication

Abstract

The invention belongs to the technical field of civil aviation mobile communication, and particularly relates to a bandwidth prediction-based congestion control method in civil aviation satellite communication, which introduces a bandwidth prediction algorithm to adjust a congestion window value in three stages of slow start, congestion avoidance and fast recovery of TCP (Transmission Control Protocol) congestion control, and comprises the following steps: initializing a system, entering the slow start stage of TCP congestion control, and entering the fast recovery stage of TCP congestion control; adjusting the increase amplitude of a congestion window by combining a dichotomy thought and a bandwidth prediction algorithm; when the congestion window value is equal to the slow start threshold value, entering a congestion avoidance stage of TCP congestion control, and adjusting the congestion window by adopting a congestion avoidance improvement mechanism; if the sending end receives three repeated ACKs or a network retransmission timer is overtime in a quick recovery stage, a congestion window and a slow start threshold are adjusted by adopting a first adjustment mechanism or a second adjustment mechanism; according to the invention, the residual bandwidth condition of the link is considered, the risk of congestion and packet loss of the link is reduced, and the throughput of the network is improved.

Description

technical field [0001] The invention belongs to the technical field of civil aviation mobile communication, and in particular relates to a congestion control method based on bandwidth prediction in civil aviation satellite communication. Background technique [0002] With the advent of the era of "air mobile phones" in China's civil aviation, passengers' demand for in-flight Internet access has become increasingly strong, and at the same time, civil aviation communication technology has also put forward fast and efficient requirements. At present, there are mainly two technologies to realize communication between civil aviation users and the ground, one is satellite-based broadband access technology, and the other is ground base station-based broadband access technology, among which satellite-based broadband access technology has a wide coverage , communication distance, and not limited by geographical conditions, etc. are playing an increasingly important role in civil avia...

AI Technical Summary

Problems solved by technology

The above two methods only improve the unilateral characteristics of the link. If they are applied to civil aviation satellite links, the performance improvement is not obvious

At the same time, both methods do not combine the remaining bandwidth of the link to judge the actual situation of the current link, resulting in blindly reducing or increasing the sending rate

Images