基于SDN的多域光网络虚拟化技术

doi:10.11959/j.issn.1000-0801.2016056

Telecommunications Science ›› 2016, Vol. 32 ›› Issue (4): 109-113.doi: 10.11959/j.issn.1000-0801.2016056

• research and development • Previous Articles Next Articles

Multi-domain optical network virtual technology based on SDN

Shidong LIU¹,Pan WANG²

¹ State Grid Smart Grid Research Institute，Nanjing 210003，China
² Nanjing University of Posts ＆ Telecommunications，Nanjing 210003，China

Online:2016-04-20 Published:2016-04-28
Supported by:
2013 Six Talent Peaks Project in Jiangsu Province;2013 Information Security Special of National Development and Reform Commission;2014 Science and Technology Projects of State Grid：Research and Application of Key Technologies of Network Traffic Prediction and Smart Pipeline for Electric Information Communication Network;2015 Prospective Joint Research Project of Jiangsu Province

Abstract

Abstract:

With the development of information society，the information flow in the network began to grow rapidly，optical network requires not only large capacity and long distance transmission，but also the need for dynamic and flexible controls，the traditional automatic switching optical network architecture is very difficult to meet it. At the same time，storage access to massive amounts of data is a very high requirement for the scalability of the distributed storage architecture. A resource balancing strategy based on SDN for the inter-domain optical network virtualization service was proposed. Simulation results indicate that network resources can be allocated effectively，service acceptance ratio is improved，and network blocking probability is reduced.

Key words: virtualized optical network, resource allocation algorithm, OpenFlow protocol, SDN-based optical network

Shidong LIU,Pan WANG. Multi-domain optical network virtual technology based on SDN[J]. Telecommunications Science, 2016, 32(4): 109-113.

Figures/Tables 5

变量	含义
G^s（V^s，E^s）	物理层的网络拓扑
c_υs	每个物理节点的计算资源容量
B^s	每个物理链路e^s_∈ E^s上子载波的总数
$w_{(u^{s}, v^{s}), k}^{s}$	物理链路e^s=（u^s，υ^s）上第k个MCSB的起始子载波下标
$z_{(u^{s}, v^{s}), k}^{s}$	物理链路e^s=（u^s，υ^s）上第k个MCSB的结束子载波下标
G^r（V^r，E^r）	虚拟光网络请求
$\frac{s_{e^{r}}^{r}}{d_{e^{r}}^{r}}$	虚拟链路e^r_∈ E^r的两端节点
$c_{v^{r}}^{r}$	虚拟节点υ^r_∈ V^r所需的计算资源
n^r	每个虚拟光链路所需的带宽
$ξ_{v^{r}, v^{s}}$	若虚拟节点υ^r映射到物理节点υ^s上，值为1；否则为0
$f_{u^{s}, n^{s}}^{e^{r}}$ $δ_{(u^{s}, v^{s})}^{(k)}$	若虚拟链路e^r_∈ E^r映射到物理链路e^s_∈（e^s，υ^s）上，值为1；否则为0若物理链路e^s_∈（u^s，υ^s）上第k个MCSB的一个CSB分配给了VON请求G^r（V^r，E^r），值为1，否则为0
w	整数变量，表示分配给VON 请求G^r（V^r，E^r）的CSB 起始子载波下标
z	整数变量，表示分配给VON 请求G^r（V^r，E^r）的CSB 结束子载波下标
CSB	连续频谱块为频域中连续可用的空闲子载波
MCSB	在某一频域，包含所有可用的空闲连续频谱段

References 8

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