On Interference Avoidance Through Inter-Cell Interference Coordination (ICIC) Based on OFDMA Mobile Systems (original) (raw)
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A Survey on Inter-Cell Interference Coordination Techniques in OFDMA-Based Cellular Networks
IEEE Communications Surveys & Tutorials, 2013
Orthogonal Frequency Division Multiplexing Access (OFDMA) has been increasingly deployed in various emerging and evolving cellular systems to reduce interference and improve overall system performance. However, in these systems Inter-Cell Interference (ICI) still poses a real challenge that limits the system performance, especially for users located at the cell edge. Inter-cell interference coordination (ICIC) has been investigated as an approach to alleviate the impact of interference and improve performance in OFDMA-based systems. A common ICIC technique is interference avoidance in which the allocation of the various system resources (e.g., time, frequency, and power) to users is controlled to ensure that the ICI remains within acceptable limits. This paper surveys the various ICIC avoidance schemes in the downlink of OFDMA-based cellular networks. In particular, the paper introduces new parameterized classifications and makes use of these classifications to categorize and review various static (frequency reuse-based) and dynamic (cell coordination-based) ICIC schemes.
Inter-Cell Interference Avoidance Techniques in OFDMA based Cellular Networks : A Survey
2015
Orthogonal Frequency Division Multiple Access (OFDMA) technique is extensively deployed in existing and next generation cellular networks to reduce interference and improve average network throughput. The OFDMA cellular network suffers from inter-cell interference (ICI) and the users found at the cell boundaries are more prone from ICI problem. Effective management of ICI is of paramount importance in order to improve cell edge throughput. Inter-cell interference avoidance is a method to improve the overall performance of the network. This paper surveys key issues in managing interference by using static frequency reuse techniques and provide a summary of the current developments of an efficient interference avoidance technique to reduce ICI in OFDMA based cellular networks. Index Terms – OFDMA; Frequency Reuse; Inter Cell Interference Coordination (ICIC); Long Term Evolution (LTE); LTE Advanced (LTE-A).
Analysis of Inter cell Interference Issues on Cellular Networks Using OFDMA
In order to reduce interference and improve the capacity of the system the orthogonal frequency division multiplexing technique has been deployed in various cellular systems. But major problem in cellular systems is intercell interference especially at the cell edges. For reducing the impacts of ICI inter cell coordination techniques are investigated in this paper. The popular interference coordination technique is interference avoidance technique where the resources are divided between the users in all spatial, time, frequency domains to reduce the interference to some extent. This paper Provides comprehensive survey on the various ICIC avoidance schemes which consists of both static and dynamic schemes in OFDMA-based cellular networks.
Intercell Interference Coordination in OFDMA Networks and in the 3GPP Long Term Evolution System
Journal of Communications, 2009
Intercell interference coordination (ICIC) in orthogonal frequency division multiple access (OFDMA) networks in general and in the 3GPP Long Term Evolution system in particular has received much attention both from the academia and the standardization communities. Understanding the trade-offs associated with ICIC mechanisms is important, because it helps identify the architecture and protocol support that allows practical systems to realize potential performance gains. In this paper we review some of the recent advances in ICIC research and discuss the assumptions, advantages and limitations of some of the proposed mechanisms. We then proceed to describe the architecture and protocol support for ICIC in the 3GPP LTE system. We make the point that the 3GPP standard is formed in a flexible way such that network operators can employ the most suitable ICIC mechanism tailored to their actual deployment scenario, traffic situation and preferred performance target.
—Resource allocation in multicell downlink orthogonal 5 frequency division multiple-access (OFDMA) systems is investi-6 gated, where base stations (BSs) first independently carry out 7 subcarrier allocation and then mitigate intercell interference 8 (InterCI) with the aid of very limited BS cooperation. Two novel 9 InterCI mitigation algorithms are proposed. The first one is the 10 distributed decision making assisted cooperation (DDMC) algo-11 rithm, and the second one is the centralized decision making 12 assisted cooperation (CDMC) algorithm. When employing the 13 DDMC algorithm, each BS independently makes the InterCI 14 mitigation decisions (IMDs). By contrast, when employing the 15 CDMC algorithm, the centralized IMDs are made with the aid of 16 the cell-edge users' discrete InterCI information sharing among 17 BSs. While both algorithms motivate maximization of the spectral 18 efficiency (sum rate), the CDMC algorithm also aims to maximize 19 the frequency reuse factor. In this paper, we study and compare 20 the performance, including spectral efficiency of cell-edge users, 21 frequency reuse factor, and overhead, of the multicell downlink 22 OFDMA systems employing the proposed and other InterCI mit-23 igation algorithms. Our studies show that both the DDMC and 24
2013
Inter Cell Interference (ICI) still poses a real challenge that limits the Orthogonal Frequency Division Multiplexing Access (OFDMA) system performance, especially for users located at the cell edge. A common Inter Cell Interference Coordination (ICIC) technique is interference avoidance in which the allocation of the various system resources (e.g., time, frequency, and power) to users is controlled to ensure that the ICI remains within acceptable limits. This paper surveys the various ICIC avoidance schemes in the downlink of OFDMA based cellular networks and makes use of these classifications to categorize and review various static (frequency reuse (FR) -based) and dynamic (cell coordination-based) ICIC schemes. A comprehensive survey that investigate such wide range in the area of ICIC as an attempt to resolve ambiguity by providing precise classification in the research community is presented. A proposed 3G RF interference mitigation techniques is provided as well. For next gene...
Distributed Inter-Cell Interference Mitigation in OFDMA Wireless Data Networks
2008 IEEE Globecom Workshops, 2008
AbstractWe consider the problem of distributed inter-cell interference mitigation in multi-carrier wireless cellular networks. Assuming that neighboring base stations can be coordinated, we optimize the network weighted sum-rate via binary power control. The weights account for ...
Indonesian Journal of Electrical Engineering and Computer Science, 2016
The inter-cell interference problem is a key issue in LTE Advanced system especially in dense urban environments. This paper present a new inter-cell interference reduction technique for LTE Advanced downlink system in dense urban area based on a new coordination algorithm with the use of linear precoding OFDM, coordination between cells and power management techniques. The objective of our new technique is to improve cell edge and centre capacity in LTE Advanced downlink system. For this purpose, we prove with real time simulations using Matlab that the S.F.R and P.F.R scheme with our algorithm is a good candidate to enhance the average cell capacity and edge user experience, without sacrificing the average cell throughput.
Interference avoidance with dynamic inter-cell coordination for downlink LTE system
2009
The investigation of co-channel interference mitigation techniques (such as, interference cancellation through receiver processing, interference randomization by frequency hopping, and interference avoidance through resource usage restrictions imposed by frequency and power planning) has become a key focus area in achieving dense spectrum reuse in next generation cellular systems such as 3GPP LTE, LTEadvanced, and WiMAX. In this paper, we propose an interference avoidance scheme for LTE downlink that uses dynamic inter-cell coordination facilitated through X2 interface among neighbouring evolved UTRAN nodeBs (eNBs, i.e., LTE base stations). Proposed scheme is evaluated by extensive simulations and compared with a number of reference schemes available in the literature. It has been observed that the proposed scheme attains superior performance in terms of cell-edge and sector throughput compared to those in the reference schemes.
AEU - International Journal of Electronics and Communications, 2011
A distributed collaborative uplink scheduling model in OFDMA systems is extended to a multicell scenario. On the intercell level, the scenarios with and without base station cooperation are investigated. In the cooperative case, base stations collaborate by performing pricing-based power control based on exchanging interference information. In the absence of intercell collaboration, probabilistic transmission is applied in each cell for interference avoidance. Simulations show that the proposed intercell interference mitigation and avoidance schemes lead to enhanced results.