QoS Based Independent Carrier Scheduling Scheme for Heterogeneous Services in 5G LTE-Advanced Networks

摘要

Efficient user-level QoS provisioning for heterogeneous services is of vital importance in future 5G Long-Term Evolution-Advanced (LTE-A) with Carrier Aggregation (CA) mobile system. The CA is very vital technique which invented by 3GPP for creating the huge virtual carrier bandwidths to support the 5G LTE-A network with unprecedented speed of data transmission and minimal latency. To the best of our knowledge, in order to support and fulfill the user level QoS obligations for diversified services "Real-Time (RT) and Non-Real-Time (NRT)", one of the main challenges in the presence of CA is to offer robust and suitable resource scheduling scheme. In this paper, the authors propose an efficient scheduling scheme, termed as "QoS based Independent Carrier (QoS-IC)" by designing Round-Robin with Service (RR-S) method for ensuring the load balancing based on the user's service in 5G LTE-A system. In addition, a user-level Quality of Service aware packet scheduling for OFDMA resource blocks suitable to multi-services system is proposed by introducing the service utility factor. The design objective is to guarantee the user quality of service (QoS) and equitable allocation of radio resources among users. Extensive simulation outcomes demonstrate that our scheduling algorithm offers significantly better QoS performance in terms of packet drop rate (PDR), variance of packet drop rate, and the average packet delay for RT traffic as well as satisfying the minimum transmission rate demand for "NRT traffic.