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基于節(jié)點(diǎn)鄰近感知與路徑綜合評(píng)估的虛擬網(wǎng)絡(luò)映射算法

趙志遠(yuǎn),  孟相如,  蘇玉澤,  李振濤

趙志遠(yuǎn), 孟相如, 蘇玉澤, 李振濤. 基于節(jié)點(diǎn)鄰近感知與路徑綜合評(píng)估的虛擬網(wǎng)絡(luò)映射算法[J]. 電子與信息學(xué)報(bào), 2017, 39(8): 1979-1985. doi: 10.11999/JEIT161252
引用本文: 趙志遠(yuǎn), 孟相如, 蘇玉澤, 李振濤. 基于節(jié)點(diǎn)鄰近感知與路徑綜合評(píng)估的虛擬網(wǎng)絡(luò)映射算法[J]. 電子與信息學(xué)報(bào), 2017, 39(8): 1979-1985. doi: 10.11999/JEIT161252
ZHAO Zhiyuan, MENG Xiangru, SU Yuze, LI Zhentao. Virtual Network Mapping Algorithm Based on Node Adjacent-awareness and Path Comprehensive Evaluation[J]. Journal of Electronics & Information Technology, 2017, 39(8): 1979-1985. doi: 10.11999/JEIT161252
Citation: ZHAO Zhiyuan, MENG Xiangru, SU Yuze, LI Zhentao. Virtual Network Mapping Algorithm Based on Node Adjacent-awareness and Path Comprehensive Evaluation[J]. Journal of Electronics & Information Technology, 2017, 39(8): 1979-1985. doi: 10.11999/JEIT161252

基于節(jié)點(diǎn)鄰近感知與路徑綜合評(píng)估的虛擬網(wǎng)絡(luò)映射算法

doi: 10.11999/JEIT161252
基金項(xiàng)目: 

國(guó)家自然科學(xué)基金(61401499)

Virtual Network Mapping Algorithm Based on Node Adjacent-awareness and Path Comprehensive Evaluation

Funds: 

The National Natural Science Foundation of China (61401499)

  • 摘要: 該文針對(duì)虛擬網(wǎng)絡(luò)映射過程中節(jié)點(diǎn)與鏈路映射關(guān)聯(lián)性差、虛擬鄰接節(jié)點(diǎn)映射距離遠(yuǎn)和相鄰節(jié)點(diǎn)鏈路資源消耗不均衡的問題，提出一種兩階段的基于節(jié)點(diǎn)鄰近感知與路徑綜合評(píng)估的虛擬網(wǎng)絡(luò)映射算法(NA-PVNM)。在節(jié)點(diǎn)映射階段，首先對(duì)虛擬節(jié)點(diǎn)按照資源請(qǐng)求和廣度優(yōu)先搜索算法排序，然后對(duì)每個(gè)虛擬節(jié)點(diǎn)的候選物理節(jié)點(diǎn)考慮資源豐富度和拓?fù)溧徑裕⒘斯?jié)點(diǎn)適應(yīng)值函數(shù)計(jì)算最佳映射節(jié)點(diǎn)。在鏈路映射階段，采用k最短路徑算法，對(duì)每條候選路徑考慮可用帶寬、途經(jīng)物理節(jié)點(diǎn)資源最大值和路徑跳數(shù)，通過路徑適應(yīng)值函數(shù)計(jì)算最佳路徑。仿真結(jié)果表明算法降低了鏈路映射長(zhǎng)度，提高了虛擬網(wǎng)絡(luò)請(qǐng)求接受率和收益開銷比。實(shí)驗(yàn)分析了位置約束和物理網(wǎng)絡(luò)拓?fù)湫再|(zhì)對(duì)算法性能的影響以及映射過程中物理網(wǎng)絡(luò)資源占用情況。實(shí)驗(yàn)結(jié)果表明，在物理資源分布和虛擬網(wǎng)絡(luò)請(qǐng)求的條件約束下，提高虛擬網(wǎng)絡(luò)映射成功率的關(guān)鍵在于減少映射時(shí)的資源消耗。
    Abstract: To solve the problems of poor correlation in node mapping and link mapping, wide apart of adjacent virtual node during mapping and imbalance resource consumption of nodes with their adjacent links, a two-stage Virtual Network Mapping algorithm is proposed based on Node Adjacent-awareness and Path comprehensive evaluation (NA-PVNM). In the stage of node mapping, firstly, virtual nodes are ranked according to resources request and breadth-first search, secondly, a node fitness function is set to find the best node in candidates of a virtual node, which takes resource richness and topology connection feature into account. In the stage of link mapping, a path fitness function is set to find the best path in candidates, which takes available bandwidth, node resource and hops of path into account. Simulation results show that the path distances of virtual links are reduced, the acceptance ratio and revenue/cost ratio of virtual networks are improved using the proposed NA-PVNM algorithm. The influence of location constraint and substrate topology feature on algorithm performance, and the resource occupancy of substrate network during mapping are analyzed by experiments. Experimental results show that, under the constraint of physical resource distribution and virtual network requests, the critical factor of improving success rate is to reduce resource consumption during mapping.
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出版歷程
  • 收稿日期:  2016-11-17
  • 修回日期:  2017-03-20
  • 刊出日期:  2017-08-19

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