Intercell Interference Coordination in OFDMA Networks and in the 3GPP Long Term Evolution System

Fodor, Gábor; Koutsimanis, C.; Rácz, András; Reider, Norbert; Simonsson, Arne; Müller, Walter

doi:10.4304/jcm.4.7.445-453

Cited by 127 publications

(90 citation statements)

References 15 publications

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“…Constraint (11) ensures that giving color to v will not create a violation of constraint (2) for v, while constraints (12) avoid such a violation for the vertices u already having color .…”

Section: Constructive Algorithms For the Pdwicpmentioning

confidence: 99%

“…We consider FFR as a term of comparison, as we have found it is often the case in literature (see for example [9,10,18]). Practical implementations of FFR in OFDMA-based systems, such as LTE networks are discussed in papers such as [21] or [11].…”

Section: Fractional Frequency Reusementioning

confidence: 99%

“…When constructing V , W is defined as the set of uncolored vertices v for which color is not available (i.e., at least one of constraints (11) and (12) is violated if color is assigned to v). Moreover, we use µ U (v) and µ W (v) instead of deg U (v) and deg W (v).…”

mentioning

confidence: 99%

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Constructive algorithms for the partial directed weighted improper coloring problem

Hertz¹,

Montagné²,

Gagnon³

2016

JGAA

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Given a complete directed graph G with weights on the vertices and on the arcs, a θ-improper k-coloring is an assignment of at most k different colors to the vertices of G such that the weight of every vertex v is greater, by a given factor 1 θ , than the sum of the weights on the arcs (u, v) entering v with the tail u of the same color as v. For a given real number θ and an integer k, the Partial Directed Weigthed Improper Coloring Problem (PDWICP) is to determine the order of the largest induced subgraph G of G such that G admits a θ-improper k-coloring. This problem is motivated by a practical channel assignment application where the objective is to maximize the number of simultaneously communicating mobiles in a wireless network. We consider three constructive algorithms for the standard vertex coloring problem, and adapt them to the PDWICP. We show that they perform better than today's phone operator systems based on decentralized channel assignment strategies such as fractional frequency reuse.

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“…Constraint (11) ensures that giving color to v will not create a violation of constraint (2) for v, while constraints (12) avoid such a violation for the vertices u already having color .…”

Section: Constructive Algorithms For the Pdwicpmentioning

confidence: 99%

Section: Fractional Frequency Reusementioning

confidence: 99%

See 1 more Smart Citation

Constructive algorithms for the partial directed weighted improper coloring problem

Hertz¹,

Montagné²,

Gagnon³

2016

JGAA

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“…Similarly, a convex optimization problem is formulated, where a single cell OFDMA network is considered. The energy efficiency objective function is studied and a low complexity suboptimal algorithm is proposed to reduce the computational burden of the optimal solution [9]. • FFR-based ICIC technique.…”

Section: Convex Optimizationmentioning

confidence: 99%

Channel Optimisation and Interference Mitiqation Techniques for Advanced Cellular Mobile Communication

Thrimurthulu¹

2017

IJRASET

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The next generation wireless cellular communication networks are envisioned to deal with the expected thousand-fold increase in total mobile broadband data and the hundred-fold increase in connected devices. In order to provide higher data rates, improved end-to-end performance and coverage, low latency, and low energy consumption at low cost per transmission, 5G systems are required to overcome various handicaps of current cellular networks and wireless links. One of the key handicaps of 5G systems is the performance degradation of the communication link, due to the increased level of interference. Due to the scarcity of the available spectrum, all the cells are allocated the same frequency resources, leading to significant inter-cell interference problems. Given the negative impact of interference on system performance, several interference mitigation techniques have been proposed, where restrictions are made on resource blocks usage, power allocation, or both. In this paper, we conduct a comprehensive survey on the existing ICIC techniques. We classify these techniques, and we study their performance while taking into consideration various design parameters. Inter-Cell Interference Coordination (ICIC) techniques are required to mitigate the impact of ICI on system performance. In this paper, we address the resource and power allocation problem in multiuser Orthogonal Frequency Division Multiple Access (OFDMA) networks such as LTE/LTE-A networks and dense small cell networks. We start screening the state-of-the-art schemes, and provide an exhaustive classification of the existing ICIC approaches. This qualitative classification is followed by a quantitative investigation of several interference mitigation techniques under uniform and non-uniform UE distributions, and for various network loads and radio conditions. The obtained results allow us to select the most adequate technique for each network scenario.

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“…On the other hand, dynamic schemes for coordinating intercell interference only impose restrictions on certain frequency resources when high interference is expected, what consequently leads to a more efficient utilization of the available frequency spectrum [1], [4], [5]. For that purpose, adjacent BSs inform each other about upcoming resource allocations of cell-edge UEs, so that this information can be taken into account in the scheduling decisions in order to limit the impact of the inter-cell interference on the system performance.…”

Section: Introductionmentioning

confidence: 99%

Cooperative interference-aware joint scheduling for the 3GPP LTE uplink

Frank

Müller

Droste

et al. 2010

21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

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Abstract-In current cellular networks base stations (BSs) usually perform independent scheduling without coordinating the resource allocation among different cells. This, however, often leads to high interference levels in cellular networks operating with universal frequency reuse, such as the 3GPP UTRAN Long Term Evolution (LTE). Coordinated scheduling between different BSs may mitigate this problem by taking interference from and to nearby BSs into account in order to avoid high interference situations, especially for user equipments (UEs) located near the cell-edge. For that purpose, we propose in this paper a novel interference-aware joint scheduling scheme based on proportional fairness for the uplink of a 3GPP UTRAN LTE system, where different BSs cooperate with each other via a fast backhaul network in order to jointly allocate frequency resources to the various UEs, taking the caused inter-cell interference into account. Furthermore, we propose an efficient method for dynamic interference coordination based on the standardized high interference indicator and we compare the achievable performance with this approach to a system with interferenceaware joint scheduling. It is shown that our joint scheduling scheme outperforms a dynamic interference coordination scheme and that it yields significant gains over a conventional LTE Release 8 system without any interference coordination.

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Intercell Interference Coordination in OFDMA Networks and in the 3GPP Long Term Evolution System

Cited by 127 publications

References 15 publications

Constructive algorithms for the partial directed weighted improper coloring problem

Constructive algorithms for the partial directed weighted improper coloring problem

Channel Optimisation and Interference Mitiqation Techniques for Advanced Cellular Mobile Communication

Cooperative interference-aware joint scheduling for the 3GPP LTE uplink

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