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integer-linear-programming--ilp
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Optimal integration of phasor measurement units in power systems considering conventional measurements
, Article IEEE Transactions on Smart Grid ; Volume 4, Issue 2 , June , 2013 , Pages 1113-1121 ; 19493053 (ISSN) ; Gharehpetian, G. B ; Dobakhshari, A. S ; Sharif University of Technology
2013
Abstract
This paper presents an integer linear programming (ILP) framework for the optimal placement of phasor measurement units (PMUs), in the presence of conventional measurements. Furthermore, by the proposed method, the power system remains completely observable during all possible single contingencies for lines and measurement devices. In doing so, the potential of circuit equations associated with both PMUs and conventional measurements as well as the network topology are fully utilized by a system of equations to reach the minimum possible numbers of required PMUs. The limitation of communication channels is also taken into account in the proposed ILP-based framework. The method is implemented...
Energy-efficient manycast routing and spectrum assignment in elastic optical networks for cloud computing environment
, Article Journal of Lightwave Technology ; Volume 33, Issue 19 , July , 2015 , Pages 4008-4018 ; 07338724 (ISSN) ; Beyranvand, H ; Salehi, J. A ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2015
Abstract
In this paper, we present an energy-efficient manycast routing and spectrum assignment (EEM-RSA) algorithm in elastic optical networks supporting cloud computing applications. The proposed EEM-RSA is adapted for both static and dynamic scenarios. First, an integer linear programing formulation is derived for energy-efficient manycasting and spectrum assignment; then, the corresponding heuristic methods are proposed. To reduce the energy consumption, inactive (idle) elements are turned off, and in the proposed energy-efficient manycasting heuristic, the number of activated elements are minimized. The power consumption of network elements is modeled by considering a constant overhead for the...
Resource allocation and multicast routing in elastic optical networks
, Article IEEE Transactions on Communications ; Volume 65, Issue 5 , 2017 , Pages 2101-2113 ; 00906778 (ISSN) ; Fallahpour, A ; Beyranvand, H ; Salehi, J. A ; Sharif University of Technology
Abstract
In this paper, we formulate an integer linear programming (ILP) to perform multicast routing and spectrum assignment (MRSA) in elastic optical networks, which serves jointly a set of multicast requests. In this formulation, all physical layer restrictions including modulation level assignment, maximum number of multicast capable nodes (MCNs), and maximum splitting degree (MSD) of MCNs, are considered. In addition, we modify the proposed joint ILP to serve multicast requests one-by-one, which is referred to as a separate ILP. Furthermore, we present three heuristic algorithms for MRSA, namely distance-based MRSA (DMRSA), congestion-based MRSA (CMRSA), and mixed CMRSA/DMRSA, which are...