Critical Analysis of Connection Establishment Procedure in Layer 3 of LTE (Long Term Evaluation)

摘要

Radio access technology is in a stage of innovation, and LTE (Long Term Evaluation) is one of them. LTE (Long Term Evaluation) delivers higher data rates, greater capacity, and wider coverage. It can work with existing network technologies such as GSM (Global System for Mobile), CDMA (Code Division Multiple Access) and WCDMA (Wideband Code Division Multiple Access). The radio resource management is important component of LTE (Long Term Evaluation) technologies. In E-UTRAN (Evolved-Universal Terrestrial Radio Access Network) radio interface, RRC (Radio Resource Control) belongs to access stratum because it is at the bottom of UN interface. In this paper, first, we describe the introduction of connection establishment procedure in all generations of wireless networks from 0~(th) generation to 4~(th) generation. We thoroughly investigate the layered architecture of LTE (Long Tem Evaluation), architecture of RRC (Radio Resource Control) and role of connection establishment in the entity, Connection establishment procedure at UE (User Equipment) side using SDL diagrams like State diagrams and MSC (Message Sequence Chats), Standard messages format exchanged during connection establishment procedure, Connection establishment procedure at network side using SDL (Sequence Diagram) diagrams like state diagrams and MSC (Message sequence charts), Connection establishment procedure in femtocells using SDL (Sequence Diagrams) Diagrams like MSC (Message Sequence Charts) and its algorithm using access and overlay relation table. In the end, we will provide some future directions.