Performance analysis of LTE LTE Advanced systems

Abstract

The focus of this research is in the area of analysing the performance of the fourth newlinegeneration (4G) mobile networks like the Long Term Evolution systems (LTE and newlineLTE-Advanced), based on the parameters like Signal to Interference to Noise newlineRatio (SINR), throughput, etc. newlineThe research method adopted in this dissertation includes designing of scenarios newlinein the system level simulation tool developed by the networking group of the newlineTelecommunication Research centre, Vienna. These scenarios are simulated to newlinestudy the effect of the inter site distances, operating frequencies, path losses, newlinescheduling algorithms and antenna height and antenna tilt on the network newlineperformance parameters like SINR and throughput. newlineWith the introduction of an important technological component Carrier newlineAggregation (CA) in 4G LTE-A systems, issues pertaining to operating frequencies newlineand scheduling algorithms, have to be dealt with. The analysis carried out as a newlinepart of research work shows the effect of the above mentioned parameters on the newlinethroughput of a network. It reveals that lower frequency components experience newlineless path losses and hence tend to provide higher throughputs in the region of newlineinterest. Also, an efficient scheduling algorithm ensures greater efficiency of a newlinenetwork. newlineSimulations carried out in the research work support the theoretical concept that newlinehigher frequencies tend to experience more path loss as compared to lower newlinefrequencies. A network operating at 800 MHz will have less path loss as compared newlineto the one using the 2 GHz band. A GSM system using 800 MHz band will tend to newlineexhibit less path loss than LTE systems using the 2 GHz and higher frequency newlinebands. Hence carrier components (CCs) belonging to higher frequency bands newlinewhen combined with CCs belonging to low frequency bands, in inter band CA, will newlinehave to consider these path losses and design their eNodeB s accordingly. Also, newlinefor networks deployed at higher frequencies the inter eNodeB distances in urban newlineenvironment should be 500m to ensure that the channel quality is good an