Multi Cell Cooperation for LTE-Advanced Heterogeneous Network

Abstract

The Long Term Evolution (LTE) project was initiated in 2004 motivated by the need to reduce the cost per bit, and the flexible use of new and existing frequency bands.LTE-Advanced is the project name of the evolved version of LTE that is being developed by 3GPP. LTE-Advanced supports several technologies to enhance the overall performance ,it supports Heterogeneous network (HET-NET)which consist of mix of different size cells within the same coverage area.HET-NET further improves the capacity and coverage but it has many drawbacks such as high interference. This research discusses issues related to enhance the overall performance of users in the heterogeneous network deployment. Users in small cells such as pico or femto are exposed to relatively high interference due to the variations in the power levels for different cell sizes.Further, more effort is needed to improve the ability to utilize the available resources in different cell levels. The key techniques used in this research are the sectorization using three sectors (which is used to mitigate the interference) and a cooperation transmission strategy (which is used to apply the cooperation technique).The investigation of the effectiveness of the above mentioned schemes is done by using simulation written in MATLAB. In which, the use of sectorizationusing three sectorsresulted in improvement in the bit rate by 10% - 14%. In addition, the deployment of the cooperation technique increasesthe bit rateup to 67%.Therefore, thethroughput increases by 50% because of the use of the sectorizationusing three sectors. Also, the deployment of the cooperation technique leads to a large increment in throughput up to 66%. Due to the above recorded enhancement in the performance parameters recommendations are made in assessing and Appling multi cell cooperation for LTE-Advanced Heterogeneous network that are to be a key technologyto enhance the performance of users in small cells which is benefit to the operators to attract more users and generate more profits.