【Objective】

2

With the rapid development of cloud computing

big data technology

and Data Center(DC)

the scale and number of DC continue to expand

and the bandwidth resources and energy consumption of optical networks is also growing rapidly. It can be seen that the method can effectively reduce both bandwidth resources and energy consumption in the network has received widespread attention.

【Methods】

2

Considering the characteristics of both the network energy consuming components

the spectrum resource allocation

and the selection of different modulation formats

we employ both adaptive traffic grooming method and a spectrum layering method for network traffic grooming. A Distance-adaptive Stratification Grooming Method (DSGM) in elastic optical networks is also proposed. We can employ the adaptive selection of different modulation formats to divide spectrum resources into different spectrum layers for network traffic grooming. In this way

on the one hand

the distance adaptive modulation method can select different modulation formats based on the length of the connection request working path. On the other hand

based on the spectrum layered traffic grooming method

the idle spectrum resources of each fiber link are layered according to different rates of optical channels. The appropriate optical channels are selected for traffic grooming through optimizing the use of spectrum resources based on the remaining bandwidth resources of the fiber links. We also introduce three different traffic grooming methods for comparison

including Spectrum Stratification Grooming Method (SSGM)

Traditional Traffic Grooming Method (TTGM)

and Traditional Method Without Grooming (TMWG).

【Results】

2

The simulation results show that the proposed approach significantly reduces the energy consumption

and the blocking probability. It also improves the network spectrum efficiency compared with SSGM

TTGM

and TMWG method.

【Conclusion】

2

We can realize the network resource optimization by using the stratification traffic grooming methods in elastic optical networks.