發(fā)布時(shí)間：2018-06-14 09:50

  本文選題：交換機(jī)調(diào)度算法 + 虛擬輸出隊(duì)列�。� 參考：《實(shí)驗(yàn)室研究與探索》2013年07期

【摘要】：為解決MPEG-4流傳輸過程中傳統(tǒng)的交換機(jī)調(diào)度算法導(dǎo)致的普通數(shù)據(jù)隊(duì)列包丟失及增強(qiáng)層有較大的延時(shí)和延時(shí)抖動(dòng)問題,采用了改進(jìn)算法,首先,將到達(dá)每個(gè)輸出端口的數(shù)據(jù)按照優(yōu)先級(jí)分成3組;其次,根據(jù)每組的特性采用動(dòng)態(tài)優(yōu)先級(jí)算法實(shí)現(xiàn),設(shè)計(jì)了一個(gè)動(dòng)態(tài)的線性優(yōu)先級(jí)計(jì)算函數(shù),該函數(shù)的輸入?yún)?shù)是每個(gè)隊(duì)列的優(yōu)先級(jí)和在每一隊(duì)列中的待發(fā)送的數(shù)據(jù)包數(shù),傳輸?shù)膬?yōu)先級(jí)隨之動(dòng)態(tài)改變。實(shí)驗(yàn)證明,提出的算法能夠保證MPEG-4基本層的傳輸,根據(jù)網(wǎng)絡(luò)帶寬狀況允許更多的MPEG-4增強(qiáng)子層通過,比傳統(tǒng)的交換機(jī)調(diào)度算法提高了MPEG-4流傳輸?shù)姆⻊?wù)質(zhì)量,更好地支持了流傳輸。
[Abstract]:In order to solve the problem of packet loss and delay jitter in the enhancement layer caused by the traditional switch scheduling algorithm in MPEG-4 stream transmission, an improved algorithm is adopted. The data arriving at each output port is divided into three groups according to the priority. Secondly, according to the characteristics of each group, the dynamic priority algorithm is used to design a dynamic linear priority calculation function. The input parameter of this function is the priority of each queue and the number of packets to be sent in each queue, and the priority of transmission changes dynamically. Experiments show that the proposed algorithm can guarantee the transmission of MPEG-4 basic layer and allow more MPEG-4 enhancement sublayers to pass according to the network bandwidth. Compared with the traditional switch scheduling algorithm, the proposed algorithm improves the QoS of MPEG-4 stream transmission and supports the streaming transmission better.
【作者單位】： 金陵科技學(xué)院信息技術(shù)學(xué)院;江蘇省信息分析工程實(shí)驗(yàn)室;南京理工大學(xué)計(jì)算機(jī)科學(xué)與技術(shù)學(xué)院;
【基金】：江蘇省教育廳高校自然科學(xué)研究項(xiàng)目(11KJD510002)
【分類號(hào)】：TP393.05

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本文編號(hào)：2016963