Long Term Evolution (LTE) is the 4th Generation mobile technology as specified by 3rd Generation Partnership Project (3GPP) standard. It has an Internet Protocol (IP) based architecture which can support downlink speeds as high as 100 Mbps. This enables reliable real time (live) video streaming on mobile devices.One of the most significant changes with LTE compared to current and earlier cellular systems is that it is aimed at an all IP network where only packet switching is supported. Voice call will no longer be using separate circuit switched channels. This book will cover the technology and architecture of LTE.In this book we have studied and analyzed the throughput and the delay performance characteristics of standard voice and video calls employing Hybrid Automatic Repeat request (HARQ) Schemes at the Medium Access Control (MAC) layer. Also emphasis has been laid on improving the Quality of Service (QoS) of voice and video transmissions LTE. This involves a detailed study of the LTE protocol stack delay, and MAC and TCP performance in the LTE network.