一種支持節(jié)點分割的vEPC虛擬網(wǎng)絡(luò)功能部署模型
doi: 10.11999/JEIT160507
基金項目:
國家863計劃項目(2014AA01A701),國家自然科學(xué)基金(61521003),科技部支撐計劃(2014BAH30B01)
A Model for Virtualized Network Function Deployment Based on Node-splitting in vEPC
Funds:
The National 863 Program of China (2014AA01A701), The National Natural Science Foundation of China (61521003), The Ministry of Science and Technology Support Plan (2014BAH30B01)
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摘要: 軟件定義網(wǎng)絡(luò)(SDN)和網(wǎng)絡(luò)功能虛擬化(NFV)促進(jìn)了網(wǎng)絡(luò)的創(chuàng)新,NFV實現(xiàn)了虛擬網(wǎng)絡(luò)功能(VNF)的邏輯集中部署。針對vEPC(virtualized Evolved Packed Core)網(wǎng)絡(luò)中VNF的池組化部署問題,該文提出一種支持節(jié)點分割的VNF部署模型,該模型基于虛擬請求業(yè)務(wù)流量的感知,利用節(jié)點分割算法動態(tài)調(diào)整VNF與底層網(wǎng)絡(luò)資源切片的映射關(guān)系,實現(xiàn)VNF的跨域組池。與傳統(tǒng)的多功能鏈聯(lián)合映射算法相比,該方法能夠?qū)崿F(xiàn)節(jié)點資源細(xì)粒度化管理和統(tǒng)籌調(diào)度,優(yōu)化網(wǎng)絡(luò)視圖,減少資源碎片。在SNDlib提供的網(wǎng)絡(luò)拓?fù)鋵嵗路抡孀C明,該模型可以降低虛擬網(wǎng)絡(luò)的資源開銷,并提高虛擬網(wǎng)絡(luò)的請求接收率。
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關(guān)鍵詞:
- 網(wǎng)絡(luò)功能虛擬化 /
- 虛擬網(wǎng)絡(luò)功能部署 /
- 5G /
- EPC(Evolved Packed Core) /
- 節(jié)點分割
Abstract: Software Defined Networking (SDN) and Network Function Virtualization (NFV) promote network innovation. NFV realizes logic centralized deployment of Virtualized Network Function (VNF). This paper proposes a kind of node-splitting VNF deployment model for problem of pooling deployment of VNF in virtualized Evolved Packet Core (vEPC) network. Based on the acknowledgement of virtual request traffic-aware, the model uses node-splitting algorithm to realize the dynamic adjustment of the mapping relation between VNF and physical network slices and organize the same VNFs across different domains as one pool. Compared with the traditional joint mapping algorithm of multi-function chain, the method can realize fine-grained management and overall scheduling of node resources, optimize network view, and reduce resource fragments. It is proven by network topology instance provided by SNDlib that the model can reduce resource overhead of virtual network and improve the ratio of acceptance of virtual network requests. -
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