Abstract
In Long Term Evolution (LTE) and LTE-Advanced networks, due to multifold data traffic growth and unpredictable variation in the received signal strength, there is no guarantee for successful reception of data packets without any error. This becomes a challenging task for Mobile Network Operators (MNOs) to support more reliable data transmissions over the network. The LTE and LTE-Advanced networks uses Hybrid Automatic Repeat reQuest (HARQ) scheme to recovery of error data packets, however the received signal strength may vary from QPSK to 64QAM regions. Therefore the performance evaluation of different Modulation and Coding Scheme (MCS) users such as QPSK, 16QAM and 64QAM for different HARQ retransmissions under different data traffic condition is vital for MNOs to predict the per user throughput and recovery of error data packets of different MCS users for different HARQ retransmissions. Hence in this paper using QualNet 8.2 network simulator, the attempt has been made to study the performance of different MCS users for different HARQ retransmissions under different data traffic scenarios. Simulation results show that the data packets received with error are less as the cell load is within its capacity and less HARQ retransmissions are sufficient to recovery of error data packets, whereas in higher data traffic scenarios, for data intensive services maximum HARQ retransmissions are vital to fulfil QoS requirements.
Key-Words / Index Term
LTE, HARQ, MCS, NACK, Data Packets, MNOs
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