【摘要】：針對(duì)SCPS-TP(Space Communications Protocol Standards Transport Protocol)協(xié)議的Vegas算法在LEO(Low Earth Orbit)衛(wèi)星網(wǎng)絡(luò)中吞吐量下降的問(wèn)題,提出了一種自適應(yīng)Vegas-AD(Adaptive)擁塞控制算法。該算法在分析Vegas的基礎(chǔ)上,細(xì)化往返時(shí)延RTT的計(jì)算方法,使其能夠更加精確地調(diào)整擁塞窗口;優(yōu)化擁塞窗口的增長(zhǎng)策略,提高了擁塞避免階段的帶寬競(jìng)爭(zhēng)力;同時(shí),提出基于網(wǎng)絡(luò)擁塞程度的自適應(yīng)窗口調(diào)整因子。仿真結(jié)果表明,VegasAD算法的帶寬競(jìng)爭(zhēng)力明顯高于Vegas,并且該算法能較大幅度地提高網(wǎng)絡(luò)吞吐量。
[Abstract]:Aiming at the problem of throughput degradation of Vegas algorithm of SCPS-TP (Space Communications Protocol Standards Transport Protocol) protocol in LEO (Low Earth Orbit) satellite network, an adaptive Vegas-AD (Adaptive) congestion control algorithm is proposed. Based on the analysis of Vegas, the algorithm refines the calculation method of round-trip delay RTT, enables it to adjust congestion window more accurately, optimizes the growth strategy of congestion window, and improves the bandwidth competitiveness of congestion avoidance phase. An adaptive window adjustment factor based on the degree of network congestion is proposed. Simulation results show that the bandwidth competitiveness of Vegas AD algorithm is significantly higher than that of Vegas, and the proposed algorithm can greatly improve the network throughput.
【作者單位】： 大連大學(xué)信息學(xué)院通信與網(wǎng)絡(luò)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(61301151,91338104)資助
【分類(lèi)號(hào)】：TN927.2

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