Virtual optical buffers: a novel interpretation of OCDMA in packet switch networks [electronic resource]

, Article Journal of Lightwave Technology ; 2012, Volume 30, Issue 18, P. 2964-2975 Kazemi, R. (Reza) ; Rashidinejad, A. (Amir) ; Nashtaali, D. (Damoun) ; Salehi, J. A ; Sharif University of Technology

Abstract

Among all proposed structures for optical networks, the optical packet switching (OPS) scheme, due to its practical implementation of IPs in an optical configuration and the consequent advantages, is a prizeworthy candidate for being employed in metropolitan area network and local area network communication levels. One of the few problems frequently met using the OPS structure in the fiber-optics realm is the lack of optical buffers, thus deteriorating the system's flexibility and quality of service. For example, optical label switching networks that have been developed recently based on the generalized multiprotocol label switching protocol, profoundly suffer from this setback which is...

Direct approach in computing robust Nash strategies for generating companies in electricity markets

, Article International Journal of Electrical Power and Energy Systems ; Vol. 54, issue , 2014 , p. 442-453 Langary, D ; Sadati, N ; Ranjbar, A. M ; Sharif University of Technology

2014

Abstract

Supply function equilibrium (SFE) is often used to describe the behavior of generating companies in electricity markets. However, comprehensive analytical description of supply function models is rarely available in the literature. In this paper, using some analytical calculations, a novel direct approach is proposed to compute the Nash equilibrium (NE) of the supply function model under uniform marginal pricing mechanism. An explicit mathematical proof for its existence and uniqueness is also presented. The proposed methodology is then generalized to accommodate practical market constraints. In addition, a new concept of robust NE is introduced and calculated based on this approach....

Game Theoretic Analysis of Oligopolistic Competition: The Case of Pool-Based Electricity Markets

, Ph.D. Dissertation Sharif University of Technology Langary, Damoun (Author) ; Sadati, Nasser (Supervisor) ; Ranjbar, Ali Mohammad (Co-Advisor)

Abstract

This research investigates the competitive behavior of producers in an oligopolistic market structure and presents new approaches to contrive appropriate bidding strategies using game theory. As a case of oligopolistic competition, we have considered a simplified model of electricity markets, and turned our focus to related economic models of competition. In particular, the supply function model has been adopted because of its realistic simulation of the bidding structure in electricity markets, for which, a new method is proposed to provides closed-form expressions in computing Nash strategies. This method is not only capable of computing all Nash equilibriums of the model, but also the...