出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：Long Term Evolution (LTE) is defined by the Third Generation Partnership Project (3GPP)standards as Release 8/9. The LTE supports at max 20 MHz channel bandwidth for a carrier.The number of LTE users and their applications are increasing, which increases the demand onthe system BW. A new feature of the LTE-Advanced (LTE-A) which is defined in the 3GPPstandards as Release 10/11 is called Carrier Aggregation (CA), this feature allows the networkto aggregate more carriers in-order to provide a higher bandwidth. Carrier Aggregation hasthree main cases: Intra-band contiguous, Intra-band non-contiguous, Inter-band contiguous.The main contribution of this paper was in implementing the Intra-band contiguous case bymodifying the LTE-Sim-5, then evaluating the Quality of Service (QoS) performance of theModified Largest Weighted Delay First (MLWDF), the Exponential Rule (Exp-Rule), and theLogarithmic Rule (Log-Rule) scheduling algorithms over LTE/LTE-A in the Down-Linkdirection. The QoS performance evaluation is based on the system's average throughput, PacketLoss Rate (PLR), average packet delay, and fairness among users. Simulation results show thatthe use of CA improved the system's average throughput, and almost doubled the system'smaximum throughput. It reduced the PLR values almost by a half. It also reduced the averagepacket delay by 20-40\% that varied according to the video bit-rate and the number of users.The fairness indicator was improved with the use of CA by a factor of 10-20%.
