11 research outputs found
Spectrum Trading: An Abstracted Bibliography
This document contains a bibliographic list of major papers on spectrum
trading and their abstracts. The aim of the list is to offer researchers
entering this field a fast panorama of the current literature. The list is
continually updated on the webpage
\url{http://www.disp.uniroma2.it/users/naldi/Ricspt.html}. Omissions and papers
suggested for inclusion may be pointed out to the authors through e-mail
(\textit{[email protected]})
Optimal provision of distributed reserves under dynamic energy service preferences
We propose and solve a stochastic dynamic programming (DP) problem addressing the optimal provision of regulation service reserves (RSR) by controlling dynamic demand preferences in smart buildings. A major contribution over past dynamic pricing work is that we pioneer the relaxation of static, uniformly distributed utility of demand. In this paper we model explicitly the dynamics of energy service preferences leading to a non-uniform and time varying probability distribution of demand utility. More explicitly, we model active and idle duty cycle appliances in a smart building as a closed queuing system with price-controlled arrival rates into the active appliance queue. Focusing on cooling appliances, we model the utility associated with the transition from idle to active as a non-uniform time varying function. We (i) derive an analytic characterization of the optimal policy and the differential cost function, and (ii) prove optimal policy monotonicity and value function convexity. These properties enable us to propose and implement a smart assisted value iteration (AVI) algorithm and an approximate DP (ADP) that exploits related functional approximations. Numerical results demonstrate the validity of the solution techniques and the computational advantage of the proposed ADP on realistic, large-state-space problems
Competition and bargaining in wireless networks with spectrum leasing
The case for a competitive market operated by a
Mobile Network Operator (MNO) and a Mobile Virtual Network
Operator (MVNO) is analysed in the paper. The resource that is
leased by the MNO to the MVNO is spectrum. The MNO and
the MVNO compete `a la Bertrand posting subscription prices
and the mobile users may choose to subscribe to one operator.
The scenario is modeled by a three-level game comprising a
bargaining game, which models the spectrum leasing by the
MNO; a competition game, which models the price competition
between the MNO and the MVNO; and a subscription game,
which models the subscription choice by the mobile users,
and the outcome of which may be either not to subscribe, to
subscribe to the MNO or to subscribe to the MVNO. The game
is solved through backward induction, and each level has a
specific solution concept: Shapley value, for the bargain; Nash
equilibrium, for the competition; and Wardrop equilibrium, for
the subscription. The paper assesses which conditions lead to an
equilibrium where the competition does take place, which are
expressed as restrictions for the spectrum leasing price agreed
at the bargaining, and the spectrum efficiency improvement
achieved by the MVNO. Furthermore, it argues that the amount
of the leased spectrum should be fixed exogenously in order to
achieve optimal user and social welfares.This work has been supported by Euro-NF Network of Excellence for all authors, the Spanish Government through projects TIN2010-21378-C02-02 and TIN2008-06739-C04-02 for the Spanish authors and the French research agency through the CAPTURES project for the French authors.Guijarro, L.; Pla, V.; Tuffin, B.; Maillé, P.; Vidal Catalá, JR. (2011). Competition and bargaining in wireless networks with spectrum leasing. Institute of Electrical and Electronics Engineers (IEEE). 1-6. https://doi.org/10.1109/GLOCOM.2011.6133605S1
Delay Sensitive Communications over Cognitive Radio Networks
Supporting the quality of service of unlicensed users in cognitive radio
networks is very challenging, mainly due to dynamic resource availability
because of the licensed users' activities. In this paper, we study the optimal
admission control and channel allocation decisions in cognitive overlay
networks in order to support delay sensitive communications of unlicensed
users. We formulate it as a Markov decision process problem, and solve it by
transforming the original formulation into a stochastic shortest path problem.
We then propose a simple heuristic control policy, which includes a
threshold-based admission control scheme and and a largest-delay-first channel
allocation scheme, and prove the optimality of the largest-delay-first channel
allocation scheme. We further propose an improved policy using the rollout
algorithm. By comparing the performance of both proposed policies with the
upper-bound of the maximum revenue, we show that our policies achieve
close-to-optimal performance with low complexities.Comment: 11 pages, 8 figure
A Game-theoretic Model for Regulating Freeriding in Subsidy-Based Pervasive Spectrum Sharing Markets
Cellular spectrum is a limited natural resource becoming scarcer at a worrisome rate. To satisfy users\u27 expectation from wireless data services, researchers and practitioners recognized the necessity of more utilization and pervasive sharing of the spectrum. Though scarce, spectrum is underutilized in some areas or within certain operating hours due to the lack of appropriate regulatory policies, static allocation and emerging business challenges. Thus, finding ways to improve the utilization of this resource to make sharing more pervasive is of great importance. There already exists a number of solutions to increase spectrum utilization via increased sharing. Dynamic Spectrum Access (DSA) enables a cellular operator to participate in spectrum sharing in many ways, such as geological database and cognitive radios, but these systems perform spectrum sharing at the secondary level (i.e., the bands are shared if and only if the primary/licensed user is idle) and it is questionable if they will be sufficient to meet the future expectations of the spectral efficiency. Along with the secondary sharing, spectrum sharing among primary users is emerging as a new domain of future mode of pervasive sharing. We call this type of spectrum sharing among primary users as pervasive spectrum sharing (PSS) . However, such spectrum sharing among primary users requires strong incentives to share and ensuring a freeriding-free cellular market. Freeriding in pervasively shared spectrum markets (be it via government subsidies/regulations or self-motivated coalitions among cellular operators) is a real techno-economic challenge to be addressed. In a PSS market, operators will share their resources with primary users of other operators and may sometimes have to block their own primary users in order to attain sharing goals. Small operators with lower quality service may freeride on large operators\u27 infrastructure in such pervasively shared markets. Even worse, since small operators\u27 users may perceive higher-than-expected service quality for a lower fee, this can cause customer loss to the large operators and motivate small operators to continue freeriding with additional earnings from the stolen customers. Thus, freeriding can drive a shared spectrum market to an unhealthy and unstable equilibrium. In this work, we model the freeriding by small operators in shared spectrum markets via a game-theoretic framework. We focus on a performance-based government incentivize scheme and aim to minimize the freeriding issue emerging in such PSS markets. We present insights from the model and discuss policy and regulatory challenges