Kaidan M. Мethods and models to design the energy efficient photonic transport networks.

The thesis is devoted to solving the problem of increasing the efficiency of PTN while minimizing the energy consumption, latency, jitter and data loss probability. In order to analyze the current conditions of telecommunication network, we contribute the tensor model based on differential geometry. In this model, we introduce the coordinate system that reflects multidimensional field, where each point of this field represents the particular condition of the telecommunication network. The tensor model combined with diakoptics method has been implemented to solve the task of multipath routing in PTN. This model is based on the assumption that the network can be divided into a set of multiple non-connected subnetworks with additional intersection subnetwork. We propose to use the diakoptics method to solve the transport task of multipath routing in telecommunication network by the means of linear programming. The proposed algorithm has been implemented and tested based on the MPLS network. We have developed the model for 3D analysis of electromechanical connection coefficient in lithium niobate crystals by the calculation of its indicative surfaces. The proposed model has been implemented and tested on the real example of lithium niobate crystal. We have determined that using the lithium niobate crystal as piezo transducer with horizontal polarization of the acoustic wave allows to decrease the energy consumption of acoustooptical switch by 3%. The model for calculation of the energy efficiency parameters in optical transport network has been improved in the thesis. We have derived the equations for energy efficiency parameters of optical transport networks. Different technologies for optical transport networks have been studied in order to ensure the feasibility of proposed model for complex networks. The efficiency of different topological structures in PTN depends on traffic load has been estimated by using the random graphs models. We have proposed to use the percolation theory in order to study the load management in the PTN. The main approaches for the PTN design based on the OBS technology have been determined. We have proposed the buffering technology in PTN with JET signaling protocol in OBS. The energy efficiency parameters for JET and TAW signaling protocols have been determined and the practical recommendations for their usage in OBS networks have been outlined. The energy efficiency of optical transport network has been studied in details from the perspective of architectural and technical approaches. Impact of many different parameters on energy efficiency have been evaluated such as number and structure of involved nodes, network architecture, type of transport technology, the size and number of data blocks, optoelectronic conversion, type of switching, wavelength conversion, regeneration and amplification, and the number of channels. The model to calculate energy efficiency for various configurations of optical transport network based on aforementioned parameters is proposed and the software that implements proposed model is developed. The performances of the proposed model have been evaluated for two types of optical switches: electro- and acousto-optical switches.