摘要
To accommodate the asymmetric characteristic of Internet traffic, we propose a flexible node architecture based on multiflow optical transponders(MF-OTP) under the integrated Cloud-Fog framework. The proposed MF-OTP architecture is flexible in the following two degrees. Firstly, it can be flexibly adjusted to transmit either downstream or upstream traffic according to the timely traffic demand distribution. Secondly, it allows multiple sub-channels using flexible(i.e., same/different) modulation formats to serve the same traffic demand. To evaluate the efficiency of the flexible MT-OTP in serving asymmetric traffic, we propose two integer linear programming(ILP) models to address the routing, modulation and spectrum assignment(RMSA), with one aiming at minimizing the required number of sub-channels and another aiming at maximizing the volume of traffic transmission. Numerical simulations are conducted and the results show that the proposed models based on the flexible MF-OTP architecture requires less number of sub-channels and can serve more traffic demands.
To accommodate the asymmetric characteristic of Internet traffic, we propose a flexible node architecture based on multiflow optical transponders(MF-OTP) under the integrated Cloud-Fog framework. The proposed MF-OTP architecture is flexible in the following two degrees. Firstly, it can be flexibly adjusted to transmit either downstream or upstream traffic according to the timely traffic demand distribution. Secondly, it allows multiple sub-channels using flexible(i.e., same/different) modulation formats to serve the same traffic demand. To evaluate the efficiency of the flexible MT-OTP in serving asymmetric traffic, we propose two integer linear programming(ILP) models to address the routing, modulation and spectrum assignment(RMSA), with one aiming at minimizing the required number of sub-channels and another aiming at maximizing the volume of traffic transmission. Numerical simulations are conducted and the results show that the proposed models based on the flexible MF-OTP architecture requires less number of sub-channels and can serve more traffic demands.
基金
supported in part by the BK21 Plus project (SW Human Resource Development Program for Supporting Smart Life) funded by the Ministry of Education, School of Computer Science and Engineering, Kyungpook National University, Korea (21A20131600005)
in part by the National Research Foundation of Korea grant funded by the Korean Government (2018R1D1A1B07051118)
in part by Institute for Information& communications Technology Promotion (IITP) grant funded by the Korea government (MSIP) (No. 2016-0- 00151, Development of LTE Small Cell supporting LWA/ LAA dual mode)
