It allows networks to achieve high throughput and low average queuing delay at the same time 它使得網(wǎng)絡(luò)取得高吞吐率的同時(shí)經(jīng)歷較低的平均隊(duì)列延時(shí)。
First , the jitter control algorithm aims at smoothing the jitter variance with low queueing delay latency 首先,延遲變異控制機(jī)制目標(biāo)在低延遲代價(jià)條件下,減緩延遲變異。
End - to - end delay of ethernet is analyzed , the expectation expression of queue delay and calculation procedure of send delay and transmission delay are presented 從以太網(wǎng)端到端的通信延遲入手,給出了以太網(wǎng)排隊(duì)延遲的數(shù)學(xué)期望表達(dá)式,發(fā)送延遲和傳輸延遲的計(jì)算方法。
The lacks of this restoration technique is needing a complicated standard processing , and the advantages are that some normal network problems could be avoided , such as queuing delay and network congestion et al 其缺點(diǎn)是,要有一個(gè)較為復(fù)雜的標(biāo)準(zhǔn)化過程;優(yōu)點(diǎn)是,可以避免一些諸如排隊(duì)延遲、網(wǎng)絡(luò)擁塞等的常見網(wǎng)絡(luò)問題。
One suits for non real time traffic and the other for real time traffic . in this paper , we focus on m - lwdf which is an interesting algorithm for providing streaming services on hsdpa because it includes in the priority computation not only the instantaneous channel quality experienced by the user , but also the packet queuing delay 其次,按照支持實(shí)時(shí)和非實(shí)時(shí)業(yè)務(wù)來分類討論無線分組調(diào)度算法,確定支持實(shí)時(shí)業(yè)務(wù)的m - lwdf算法為本文重點(diǎn)研究對(duì)象,分析了在固定比特速率情況下m - lwdf算法的性能,并對(duì)其作了修正。
Furthermore , aqm also need to avoid sending congestion notification to too many sources and consequently decreasing the utilization of bottleneck link . therefore the sending rate of congestion notification should relate to the traffic load but red does n ' t take this factor into consideration thereby resulting in queu e size oscillate which arose queuing delay and jitter 具體說來, red算法中擁塞指示的發(fā)送速率主要是由參數(shù)max _ p來體現(xiàn)的,并且max _ p值是靜態(tài)設(shè)置的,所以當(dāng)流量負(fù)荷發(fā)生改變時(shí)red算法難以適應(yīng)這種變化,從而會(huì)引起隊(duì)列振蕩,導(dǎo)致不必要的傳輸延遲和抖動(dòng)現(xiàn)象。
Coordinated control of major road signals is a valid pathway to reduce vehicle queue delay and numbers of stop at intersections ; traffic simulation model of coordinated control imitates vehicle performance in traffic network through mathematical model . we can study how to affect vehicle flow due to alteration of traffic network signal parameter 干道信號(hào)協(xié)調(diào)控制是減少交叉口車輛排隊(duì)延誤和停車率的有效途徑;線控研究建立交通仿真模型,是用數(shù)學(xué)方法模擬車流在道路網(wǎng)上的運(yùn)行狀況,研究道路網(wǎng)配時(shí)參數(shù)的改變對(duì)車流運(yùn)行的影響。
While the rate - based dropping on burst level large time scales determines the packet drop aggressiveness and is responsible for low and stable queuing delay , good robustness and responsiveness , the queue - based modulation of the packet drop probability on packet level small time scales will bring low loss and high throughput 突發(fā)行為具有自相似或尺度不變性scale - invariant ,即流量在不同的時(shí)間尺度上具有相似的突發(fā)特性2局部縮放性。流量過程的局部奇異性使流量在小時(shí)間尺度數(shù)百ms及以下的突發(fā)非常強(qiáng)烈,具有非高斯分布。