Dynamic spectrum assignment in multicell OFDMA networks enabling a secondary spectrum usage

Bernardo, Francisco; Agustí, R.; Pérez‐Romero, Jordi; Sallent, O.

doi:10.1002/wcm.760

Cited by 13 publications

(12 citation statements)

References 19 publications

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“…This is achieved by means of a centralized scheme that closely approximates to a network‐wide proportional fairness. Similar architectures can be found in .…”

Section: Intercell Interference Coordination For Orthogonal Frequencymentioning

confidence: 99%

On the need for dynamic downlink intercell interference coordination for realistic Long Term Evolution deployments

González

García-Lozano

Ruíz

et al. 2012

Wirel. Commun. Mob. Comput.

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Intercell interference is the main issue limiting the capacity of modern orthogonal frequency‐division multiple access based cellular networks. Recently, extensive research work has been carried out in this field, and intercell interference coordination techniques have been recognized as key enablers of current (and future) cellular technologies. In this article, (i) a comprehensive survey of the most representative contributions is provided together with (ii) a generic methodology to measure their actual merit. The performance of several interference avoidance strategies has been evaluated both from system and user point of view in the context of a Long Term Evolution (LTE)‐based network considering not only synthetic cellular scenarios but also realistic deployments. Our literature review indicates that there is a need for adaptive/operator‐customizable low‐complex intercell interference coordination (ICIC) schemes suitable for realistic LTE deployments. Results obtained by means of a comprehensive set of simulations corroborate and support this premise. In this article, it is shown that simultaneous gains in terms of spectral/energy efficiency and fairness can be achieved through dynamic mechanisms with respect to both classic hard reuse schemes and static ICIC techniques. Besides numerical results, a novel merit assessment methodology based on several weighted performance metrics is proposed. Our findings show that dynamic schemes outperform static techniques by around 20–35% in realistic deployments. Copyright © 2012 John Wiley & Sons, Ltd.

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“…This is achieved by means of a centralized scheme that closely approximates to a network‐wide proportional fairness. Similar architectures can be found in .…”

Section: Intercell Interference Coordination For Orthogonal Frequencymentioning

confidence: 99%

On the need for dynamic downlink intercell interference coordination for realistic Long Term Evolution deployments

González

García-Lozano

Ruíz

et al. 2012

Wirel. Commun. Mob. Comput.

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“…Fig. 4 compares the results for the proposed RL-DSA algorithm with fixed frequency reuse factors FRF1 (full assignment) and FRF3 (1/3 of the bandwidth is assigned per cell), and a dynamic heuristic strategy named here DSA-heur [12]. Performance results are presented in terms of user's average dissatisfaction probability, spectral efficiency and the capacity of releasing spectrum.…”

Section: Resultsmentioning

confidence: 99%

A Self-Organized Spectrum Assignment Strategy in Next Generation OFDMA Networks Providing Secondary Spectrum Access

Bernardo

Agustí

Perez-Romero

et al. 2009

2009 IEEE International Conference on Communications

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Abstract-This paper proposes a Self-organized Spectrum Assignment strategy in the context of next generation multicell Orthogonal Frequency Division Multiple Access networks. The proposed strategy is able to dynamically find spectrum assignments per cell depending on the spatial distribution of the users over the scenario, opening new spectrum access opportunities for secondary spectrum usage. Reinforcement Learning methodology has been employed to implement the strategy, which compared with other fixed and dynamic spectrum assignment strategies shows the best tradeoff between spectral efficiency and Qualityof-Service while releases spectrum in large geographical areas.

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“…On the network side, dynamic spectrum management (DSM) [40][41][42][43] provides the mid-and long-term management of the spectrum (e.g. of the order of hours, days) for the different radio systems.…”

Section: Functional Architecturementioning

confidence: 99%

The E3 architecture: enabling future cellular networks with cognitive and self‐x capabilities

et al. 2010

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SUMMARYFuture mobile networks are expected to be complex heterogeneous systems. On the one hand this will enable users to take advantage of a number of different access technologies. On the other hand it will seriously affect network management procedures since more extensive operations and decisions will have to be dealt with. To tackle these challenges a number of new dynamic mechanisms need to be designed. It is imperative that certain network management tasks have to be performed without human intervention to reduce the OPEX costs and achieve faster responses in different events. To achieve this goal, the introduction of self-x functionalities, combined with cognitive mechanisms and the ability to reconfigure network entities and terminals, is required. Moreover, the introduction of a new pilot channel needs to be considered to assist the terminals in selecting the most suitable radio access technology according to their requirements. We present the functional architecture of an evolved network that was designed in the context of the EU-funded IP project 'E 3 : End-to-End Efficiency'. This architecture aims to enhance existing procedures usually performed in traditional operation and maintenance systems (e.g. spectrum management, network planning, configuration actions). We explain the rationale of our design and provide specific examples to illustrate the role of the different functional entities and their interfaces. A considerable part of this architecture has recently been approved as a feasibility study by the ETSI Committee Reconfigurable Radio System.

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Dynamic spectrum assignment in multicell OFDMA networks enabling a secondary spectrum usage

Cited by 13 publications

References 19 publications

On the need for dynamic downlink intercell interference coordination for realistic Long Term Evolution deployments

On the need for dynamic downlink intercell interference coordination for realistic Long Term Evolution deployments

A Self-Organized Spectrum Assignment Strategy in Next Generation OFDMA Networks Providing Secondary Spectrum Access

The E3 architecture: enabling future cellular networks with cognitive and self‐x capabilities

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