自相似業(yè)務(wù)流下的服務(wù)質(zhì)量保障

【摘要】將來網(wǎng)絡(luò)服務(wù)質(zhì)量需要考慮網(wǎng)絡(luò)業(yè)務(wù)流自有的自相似性對(duì)網(wǎng)絡(luò)性能的影響，而傳統(tǒng)的網(wǎng)絡(luò)模型未考慮此因素。該文利用分?jǐn)?shù)布郎運(yùn)動(dòng)模型，建立了一個(gè)網(wǎng)絡(luò)模型，此模型考慮了業(yè)務(wù)流的自相似，以及聚類的特性，通過控制有效帶寬，提高統(tǒng)計(jì)復(fù)用效率，并通過審核控制機(jī)制，提供網(wǎng)絡(luò)服務(wù)。實(shí)驗(yàn)證明分?jǐn)?shù)布郎運(yùn)動(dòng)模型能如實(shí)描述業(yè)務(wù)流特性，準(zhǔn)確預(yù)測(cè)業(yè)務(wù)流的性能，能夠最大限度地利用網(wǎng)絡(luò)資源，提高服務(wù)質(zhì)量，彌補(bǔ)原來網(wǎng)絡(luò)排隊(duì)模型的缺陷。
關(guān) 鍵 詞 自相似業(yè)務(wù)流; 服務(wù)質(zhì)量; 準(zhǔn)許控制; 分?jǐn)?shù)布朗運(yùn)動(dòng)

Network quality of service in future needs to consider the impact of inherent self-similar. Traditional networks ignore this. The paper utilizes Fractional Brownian Motion model to build a network model, which improves statistical multiplexing efficiency by controlling effective bandwidth and provides services by admission control. Experiment verifies that FBM model can realistically describe packet traffic flows，predict their performance, make full use of network recourses, and make up the deficiency of conventional queue models.