Review of studies on end-to-end QoS in LTE networks

The study of the end-to-end QoS (Quality of Service) features of wireless networks may give to mobile operators ways to manage the network infrastructures from a trustworthy and robustness perspective, to optimize the network usage and guarantee desired quality of services to end user. In this paper a review of studies on end-to-end QoS in LTE networks is presented. The most important features of the LTE (Long Term Evolution) 3GPP Standard are its network architecture, its ability to support the end-to-end QoS and its ability to differentiate the user services. The wireless standard which has immediately preceded LTE is the WiMAX Standard. Such a standard is based on the same radio transmission system (OFDM). Therefore in the first part of the paper we compare the QoS aspects of the LTE and WiMAX. In the second part of the paper we focus on QoS aspects in E-UTRAN (Evolved Universal Terrestrial Radio Access Network) section of LTE networks. In the third part of the paper we also analyze the QoS aspects of the end-to-end LTE network: the E-UTRAN section and the EPC (Evolved Packet Core) section.