深度業(yè)務(wù)感知與電信網(wǎng)P2P業(yè)務(wù)

分析了深度業(yè)務(wù)感知的需求與現(xiàn)狀，及其用于識(shí)別P2P的應(yīng)用；對(duì)比了現(xiàn)有網(wǎng)絡(luò)和NGN的區(qū)別，總結(jié)了運(yùn)營(yíng)商應(yīng)對(duì)P2P的措施及各措施的優(yōu)缺點(diǎn)，以及運(yùn)營(yíng)P2P的可能性和必要性。分析了深度業(yè)務(wù)感知現(xiàn)有技術(shù)的優(yōu)缺點(diǎn)，明確了深度業(yè)務(wù)感知未能完全達(dá)到電信級(jí)要求的背景，提出了電信運(yùn)營(yíng)商介入P2P運(yùn)營(yíng)的具體方式。該運(yùn)營(yíng)方法與傳統(tǒng)方法的區(qū)別在于合理利用了P2P技術(shù)的優(yōu)點(diǎn)，是一種融合各方優(yōu)勢(shì)的運(yùn)營(yíng)模式，深度業(yè)務(wù)感知技術(shù)在其中得到了應(yīng)用。
關(guān) 鍵 詞 深度業(yè)務(wù)感知; 運(yùn)營(yíng)模式; P2P業(yè)務(wù); 電信業(yè)務(wù)

The requirement and current status of deep packet inspection are analyzed with applications in Peer-to-Peer (P2P). The difference of traditional network and Next Generation Network (NGN) is presented, and the operator’s measures of managing P2P are also summarized. The possibility and necessity of operating P2P are also discussed. After the analysis of current Deep Packet Inspection (DPI) technology, the fact that DPI can not satisfy the telecommunication level requirement is pointed out. A concrete mechanism of telecommunication operator dominating P2P service operation is proposed. This mechanism is different from traditional method in utilizing the superiority of P2P technology properly and synthesizing every participant’s advantage.
Key words deep packet inspection; P2P service; operation mode; telecommunication services

隨著電信網(wǎng)逐步向下一代網(wǎng)絡(luò)(Next Generation Network，NGN)的演進(jìn)，以及運(yùn)營(yíng)商對(duì)能增加ARPU(Average Revenue Per User)值的電信新業(yè)務(wù)的強(qiáng)烈需求，電信業(yè)在逐步開放的過(guò)程中出現(xiàn)了一些新的問(wèn)題。在全I(xiàn)P架構(gòu)下的下一代網(wǎng)絡(luò)中，電信運(yùn)營(yíng)商要達(dá)到在傳統(tǒng)電信網(wǎng)中一樣的質(zhì)量保證和全局控制能力是一個(gè)挑戰(zhàn)[1]。固網(wǎng)運(yùn)營(yíng)商在架設(shè)IP網(wǎng)絡(luò)的時(shí)候，已經(jīng)受到了業(yè)務(wù)不可區(qū)分和控制所帶來(lái)的危害，從而急需對(duì)P2P下載類應(yīng)用(如BT、emule等)、P2P(Peer to Peer)流媒體應(yīng)用(如PPLive、PPStream等)、即時(shí)消息類應(yīng)用(如MSN、QQ等)，以及VoIP(Voice on IP)應(yīng)用(如Skeype等)進(jìn)行檢測(cè)和控
制[2]。其中以P2P和VoIP類應(yīng)用最受運(yùn)營(yíng)商關(guān)注，因?yàn)镻2P應(yīng)用會(huì)大量消耗帶寬，而非法VoIP類應(yīng)用則造成了運(yùn)營(yíng)商語(yǔ)音類業(yè)務(wù)收入的下降[3]。移動(dòng)運(yùn)營(yíng)商在建設(shè)下一代全I(xiàn)P架構(gòu)的移動(dòng)通信網(wǎng)時(shí)，也將面臨類似的問(wèn)題。深度業(yè)務(wù)感知(Deep Packet Inspection，DPI)作為一種解決方案受到重視，它從傳輸層到應(yīng)用層協(xié)議對(duì)業(yè)務(wù)的數(shù)據(jù)包進(jìn)行檢測(cè)和識(shí)別，力圖以較高的準(zhǔn)確率檢測(cè)出業(yè)務(wù)類型，從而根據(jù)不同的業(yè)務(wù)類型對(duì)流量進(jìn)行控制[4]。但是，僅僅依靠深度業(yè)務(wù)感知技術(shù)，而達(dá)到對(duì)流量的控制，只是一種提高用戶體驗(yàn)的手段。下一代網(wǎng)絡(luò)的特征之一是業(yè)務(wù)的豐富性和快速性，故運(yùn)營(yíng)商應(yīng)積極地引入P2P等應(yīng)用，并且處在主導(dǎo)地位對(duì)這些應(yīng)用進(jìn)行業(yè)務(wù)運(yùn)營(yíng)，才能達(dá)到多贏的局面。