Adaptability Analysis of Fluctuating Traffic for IP Switching and Optical Switching

Release Date:2021-03-15  Author:LIAN Meng, GU Rentao, JI Yuefeng, WANG Dajiang, LI Hongbiao  Click:

Adaptability Analysis of Fluctuating Traffic for IP Switching and Optical Switching

LIAN Meng1, GU Rentao1, JI Yuefeng1, WANG Dajiang2, LI Hongbiao 2
(1. State Key Laboratory of Mobile Network and Mobile Multimedia Technology, Shenzhen 518057, China;
2. ZTE Corporation, Shenzhen 518057, China)

Abstract: The technological development of smart devices and Internet of Things (IoT) has brought ever-larger bandwidth and fluctuating traffic to existing networks. The analysis of network capital expenditure (CAPEX) is extremely important and plays a fundamental role in further network optimizing. In this paper, an adaptability analysis is raised for IP switching and optical transport network (OTN) switching in CAPEX when the service bandwidth is fluctuating violently. This paper establishes a multi-layer network architecture through Clos network model and discusses impacts of maximum allowable blocking rate and service bandwidth standard deviation on CAPEX of IP network and OTN network to find CAPEX demarcation point in different situations. As simulation results show, when the bandwidth deviation mean rate is 0.3 and the maximum allowable blocking rate is 0.01, the hardware cost of OTN switching will exceed IP switching as the average bandwidth is greater than 6 100 Mbit/s. When the service bandwidth fluctuation is severe, the hardware cost of OTN switching will increase and exceed IP switching as the single port rate is allowed in optical switching. The increasing of maximum allowable blocking rate can decrease hardware cost of OTN switching. Finally, it is found that Flex Ethernet (FlexE) can be used to decrease CAPEX of OTN switching greatly at this time.
Keywords: bandwidth fluctuating; CAPEX; OTN switching; IP switching; FlexE

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