自相似流量的主動(dòng)隊(duì)列管理算法
Self-Similar Traffic Control in Active Queue Management
-
摘要: 該文提出了一種替代隨機(jī)早期檢測(cè)(RED)的主動(dòng)隊(duì)列管理算法：信號(hào)能量的小波分解(wavelet-decomposed signal energy, WDSE)算法。WDSE能夠有效地對(duì)自相似流量進(jìn)行擁塞檢測(cè)和管理。采用小波的二階子段濾波測(cè)量輸入流量的能量，基于小波的多分辨率分析可以對(duì)到達(dá)流量的短期和長(zhǎng)期波動(dòng)進(jìn)行預(yù)報(bào)，重新調(diào)整主動(dòng)隊(duì)列管理的丟棄概率。WDSE可以避免先前主動(dòng)隊(duì)列管理所難以解決的參數(shù)選擇問(wèn)題，如RED等。該文比較了WDSE和RED的動(dòng)態(tài)性能，顯示W(wǎng)DSE能夠有效改善系統(tǒng)的暫態(tài)特性。仿真證明WDSE比RED能更快地響應(yīng)負(fù)載的變化。此外，WDSE在控制瞬時(shí)隊(duì)列長(zhǎng)度的穩(wěn)態(tài)值也具有更好的魯棒性。
-
關(guān)鍵詞:
- 自相似性;WDSE;主動(dòng)隊(duì)列管理;多分辨率分析;能量函數(shù)
Abstract: In this paper, an alternative AQM(Active Queue Management) is designed: WDSE (Wavelet-Decomposed Signal Energy) approach is capable of detecting and managing self-similar traffic. This approach uses wavelets and measures the energy of input traffic at the output of each dyadic subband filter. The scheme is based on the wavelet multiresolution analysis, which can be used to predict short and long term fluctuations in the incoming traffic pattern and readjust the marking drop probabilities without the difficulty of parameters selection in advance unlike RED. Comparing the WDSE and RED about the dynamic performance, improved transient performance of WDSE is illustrate. As evident from the simulation, the WDSE performs better, responding more quickly to load variations than the RED. Moreover, the WDSE is superior in robustly regulating the steady-state value of the queue level. -
計(jì)量
- 文章訪問(wèn)數(shù): 2350
- HTML全文瀏覽量: 97
- PDF下載量: 709
- 被引次數(shù): 0
下載:
