带有区分保护的虚拟化FiWi网络可靠传输机制

doi:10.11959/j.issn.1000-436x.2019069

Abstract

Abstract:

In view of the different reliability requirements of network service,a reliable transmission mechanism with differentiated protection was proposed in virtualized fiber-wireless access network.The quality of protection required by users and the fees that can be paid were used as a prerequisite.The backup protection resources were flexibly allocated by quantifying the multi-level protection quality with the probability of recovery.Then,for reducing traffic congestion and the unprotected services,the level service differentiation algorithm was used to choose protection link which was satisfied with the level of protection quality.The results show the proposed mechanism has more advantages in terms of long-term benefit-to-cost ratio and underlying network resource overhead,and provides users with a more flexible virtual network transmission while satisfying users’ reliability requirements.

Key words: integrated fiber-wireless access network, network virtualization, reliability, differentiated protection

CLC Number:

TP393

Ruyan WANG,Yishuang GAO,Xiao CHEN. Reliable transmission mechanism with differentiated protection in virtualized fiber-wireless access network[J]. Journal on Communications, 2019, 40(3): 36-47.

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References 19

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符号及变量	定义
N^S	物理设备集合
E^V	虚拟链路集合
C (n_i)	物理节点i的处理能力
c_k(n ^v)	第k个虚拟网映射所需处理能力
e _ij	i到j的链路
r (e_i)j	可用带宽
B (e_i)j	e _ij总带宽
b_k(e^v)	第k个虚拟网映射占用带宽
p_u	主路径映射方案
b_u	备份路径映射方案
l	第l级QoP保护方案

参数设定	参数值
OLT数	1
ONU数	8
无线路由器数	64
光纤链路带宽/(Gbit.s^-1)	10
无线链路带宽/(Mbit.s^-1)	54
光侧节点处理能力/GHz	50
无线侧节点处理能力/GHz	20
路径拆分开销/μs	100
路径合流开销/μs	100
物理节点转发开销/μs	20,70]
虚拟节点资源需求/GHz	5,15]
虚拟链路带宽请求/(Mbit.s^-1)	5,50]

Reliable transmission mechanism with differentiated protection in virtualized fiber-wireless access network

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