Exponential Effective SIR metric for LTE downlink

Lecture Notes in Computer Science

Ruíz

et al. 2010

Self Cite

Abstract. This paper focuses in the analysis of 100% static and distributed inter-cell interference coordination techniques in the context of LTE networks. Several methods have been modeled and studied with the aim of deriving practical radio planning rules based on the joint effect of operational parameters and thresholds. The investigation places special emphasis on the efficiency vs. fairness tradeoff. Several metrics have been detected as interesting to allow not only the performance measurement from different point of view, but also to look at the effectiveness in the utilization of resources. Results show that similar levels of spectral efficiency can be achieved by means of a proper and accurate network tuning. On the other hand, interesting second order differences appear due to some inherent features of each approach. These can be exploited depending on the particular network operator needs.

Section: Methodsmentioning

confidence: 99%

Static Inter-Cell Interference Coordination Techniques for LTE Networks: A Fair Performance Assessment

Gonzalez

Lecture Notes in Computer Science

Ruíz

et al. 2010

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“…In this sense, each user computes the SINR per sub-carrier and derives an effective SINR (ESINR) per PRB. This mapping has been done using the link abstraction model based in mutual information at modulation symbol level [11], which outperforms the classic Effective Exponential SINR model, particularly in the prediction of high order modulations BLER (64QAM) [12].…”

Section: Methodsmentioning

confidence: 99%

Performance Evaluation of Downlink Interference Coordination Techniques in LTE Networks

González

2010 IEEE 72nd Vehicular Technology Conference - Fall

Corvino

et al. 2010

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Abstract-This paper presents a joint study of several intercell interference coordination strategies considering both static and dynamic approaches, and with different adjustments in their basic parameters. A wide evaluation is presented with special emphasis on the efficiency vs. fairness tradeoff. Besides, additional performance metrics have been considered as enablers of a full understanding of the strengths and weaknesses of each method. Results show that, although spectral efficiency can achieve similar values with proper tuning, certain schemas outperform others in important parameters such as the effectiveness in the utilization of resources. Dynamic semi-centralized approaches appear as an attractive option with an acceptable level of adaptability, moderate complexity and good performance.

“…Now, let us assume that

\overset{γ}{true}_{m}^{n}

is a vector containing the SINR values for those subcarriers in PRB n . Then, for the particular case of LTE, the achievable throughput can be obtained by means of the following steps (see Table ):

γ_{m MathClass-punc, normalef}^{n} MathClass-rel= Γ ((), \overset{γ}{true}_{m}^{n})

{italicC QI}_{m}^{n} MathClass-rel= Λ ((), γ_{m MathClass-punc, normalef}^{n})

{italicT H}_{m}^{n} MathClass-rel= f ((), {italicC QI}_{m}^{n})

Equation corresponds to the effective SINR computation . Equation represents the mapping of this value into a channel quality indicator (CQI).…”

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

Wirel. Commun. Mob. Comput.

Ruíz

et al. 2012

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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.