The evaluation of the impact of Inter-Cell Interference Coordination on the performance of users in an LTE system

  • Daberechi Goodnews Uwakwe University of Salford
  • Ayodeji Akeem Ajani PAU Institute of Basic Sciences, Technology and Innovation
  • Odum Rowani University of Salford
  • N. Isaac Ugbogu University of Salford

Abstract

The Long-Term Evolution (LTE) mobile/wireless standard was introduced with the motivation that it would offer remarkable improvement to the previous communication standard – Evolved High Speed Packet Access (HSPA+). LTE systems, unlike the earlier standards, tend to utilize the available frequency spectrum in each cell of the network and hence promise to offer higher throughput to the users in the network, better system capacity, lower latency and delay, improved spectral efficiency etc. In order for the standard to effectively meet up with these performance targets, it has to eliminate or minimize the interference on the network. LTE adopts the Orthogonal Frequency Division Multiple Access (OFDMA) method which successfully eliminates the presence of intra-cell interference by enabling the users in each cell to transmit orthogonally. However, the standard still suffers inter-cell interference which could be as a result of two cell-edge users located in two adjacent cells communicating at the same frequency or both causing interference to each other due to the high-power level at which they transmit. This leads to an overall reduction in the system performance in terms of signal to interference and noise ratio (SINR) values, system capacity, users’ potential data rates. This research studies the performance of cell-centre and cell-edge users in a 7-cell LTE cellular network model as simulated on MATLAB 7.11. This research evaluates the performance in terms of SINR, capacity and spectral efficiency of the users in the network with more focus on the users in the cell-edge region.  A comparison was made of the performance of the users located in the reference cell in two conditions; when the interference from all the adjacent cells was not managed; and when inter-cell interference coordination (ICIC) was implemented. ICIC implementation was by shutting down one or more interfering cells. The comparison was to show the level of improvement as perceived by the users in the cell with the implementation of ICIC.The outcome of the study showed improvement in the cell users’ quality of experience (QoE) which includes higher SINR values, increased capacity and better spectral efficiency in the network as the number of sources of inter-cell interference reduces.
 Keywords—Interference, Inter-Cell Interference Coordination (ICIC), Long-Term Evolution (LTE), MATLAB, Orthogonal Frequency Division Multiple Access (OFDMA), Signal to Noise Ratio(SINR)
Published
Jun 24, 2018
How to Cite
UWAKWE, Daberechi Goodnews et al. The evaluation of the impact of Inter-Cell Interference Coordination on the performance of users in an LTE system. Proceedings of Sustainable Research and Innovation Conference, [S.l.], p. 80-88, june 2018. ISSN 2079-6226. Available at: <http://sri.jkuat.ac.ke/ojs/index.php/proceedings/article/view/643>. Date accessed: 23 feb. 2019.