Downlink Performance Evaluation of Coordinated Multi-Point: The Case of Addis Ababa LTE Network
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Date
2017-02
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Addis Ababa University
Abstract
The current Addis Ababa Long Term Evolution (AA LTE) is deployed to provide better data service for users. But mobile data network performance is negatively affected - especially for cell edge users - by inter-cell interference (ICI) resulting from short inter-site distance and the use of frequency reuse factor 1. One method to overcome the ICI is the use of coordinated multi-point (CoMP). In this thesis the effect of CoMP joint transmission was studied for mitigating the ICI in the AA LTE.
To check the feasibility of the proposed solution, the performance of the current AA LTE is evaluated using simulation and considering CoMP joint transmission. Evaluation of the network performance is done for a selected test case area in Addis Ababa city and considering actual base station locations and the terrain data of the city. The simulation is done for a 20 MHz bandwidth and the round ribbon scheduling algorithm is used for radio resource allocation for both CoMP and non-CoMP system.
The results from the simulation show that by using CoMP the signal to interference noise ratio (SINR), and throughput for the average and cell-edge user show considerably significant improvement. The results show that the SINR increased by 1.5dB for the cell edge user and by 1.9dB for the average user in intra-site CoMP. For the inter-site CoMP system, an increase in SINR of 5.6dB and 4.3dB for the cell edge user and cell average user respectively is observed. In addition, the throughput for the cell edge user and average user improved by 14% and 6% respectively for intra-site CoMP and by 18 % and 10% for inter-site CoMP. These results show that CoMP joint transmission is worthy for deployment in the current AA LTE and can improve the coverage for cell edge users
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LTE Network