A beginner’s tutorial containing complete knowledge of LTE. Call flow in lte pdf, Exceptions Handling, Sockets, GUI, Extensions, XML, Programming. 3G packet core network evolution. The term LTE is typically used to represent both LTE and SAE.
First version of LTE was documented in Release 8 of the 3GPP specifications. The main goal of LTE is to provide a high data rate, low latency and packet optimized radioaccess technology supporting flexible bandwidth deployments. Same time its network architecture has been designed with the goal to support packet-switched traffic with seamless mobility and great quality of service. LTE is the successor technology not only of UMTS but also of CDMA 2000. LTE is important because it will bring up to 50 times performance improvement and much better spectral efficiency to cellular networks.
LTE introduced to get higher data rates, 300Mbps peak downlink and 75 Mbps peak uplink. In a 20MHz carrier, data rates beyond 300Mbps can be achieved under very good signal conditions. In FDD uplink and downlink transmission used different frequency, while in TDD both uplink and downlink use the same carrier and are separated in Time. LTE supports flexible carrier bandwidths, from 1.
4 MHz up to 20 MHz as well as both FDD and TDD. LTE designed with a scalable carrier bandwidth from 1. 4 MHz up to 20 MHz which bandwidth is used depends on the frequency band and the amount of spectrum available with a network operator. Multiple Input Multiple Output transmissions, which allow the base station to transmit several data streams over the same carrier simultaneously.
All interfaces between network nodes in LTE are now IP based, including the backhaul connection to the radio base stations. T1, ATM and frame relay links, with most of them being narrowband and expensive. UMTS systems utilizing existing 2G and 3G spectrum and new spectrum. Supports hand-over and roaming to existing mobile networks. High data rates can be achieved in both downlink as well as uplink. Time required to connect to the network is in range of a few hundred milliseconds and power saving states can now be entered and exited very quickly.
Optimized signaling for connection establishment and other air interface and mobility management procedures have further improved the user experience. LTE will also support seamless connection to existing networks such as GSM, CDMA and WCDMA. The user does not have to manually install drivers for the device. Instead system automatically recognizes the device, loads new drivers for the hardware if needed, and begins to work with the newly connected device. Just as Ethernet and the internet have different types of QoS, for example, various levels of QoS can be applied to LTE traffic for different applications. Because the LTE MAC is fully scheduled, QoS is a natural fit. UMTS FDD bands and TDD bands defined in 36.
Following is the table for E-UTRA operating bands taken from LTE Sepecification 36. The evolved packet core communicates with packet data networks in the outside world such as the internet, private corporate networks or the IP multimedia subsystem. This handles all the communication functions. This terminates the data streams. This is also known as the SIM card for LTE equipments. This keeps information about the user’s phone number, home network identity and security keys etc.