LTE TUTORIAL PDF
LTE stands for Long Term Evolution and it was started as a project in by LTE introduced to get higher data rates, Mbps peak downlink and 75 Mbps. Long Term Evolution (LTE) - A Tutorial. Ahmed Hamza [email protected] Network Systems Laboratory. Simon Fraser University. October Technical Overview of 3GPP LTE | Hyung G. Myung. 1 . A comprehensive tutorial available at worldcreation.info
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lights aspects of the network architecture and interfaces that enable LTE networks to This paper provides a comprehensive tutorial of the overall EPS network. LTE Tutorial part 1 LTE Basics. Yogesh Chutani. Marius Pesavento - marius. [email protected] Willem Mulder - [email protected] LTE Tutorial. Long Term Evolution (LTE): an introduction. October White Paper. Long Term Evolution (LTE) –offers superior user experience and simplified technology .
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3G LTE evolution
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LTE is designed to meet carrier needs for high-speed data and media transport as well as high-capacity voice support well into the next decade. LTE is well positioned to meet the requirements of next-generation mobile networks.
LTE Transport Tutorial
It will enable operators to offer high performance, mass-market mobile broadband services, through a combination of high bit-rates and system throughput — in both the uplink and downlink — with low latency.
LTE infrastructure is designed to be as simple as possible to deploy and operate, through flexible technology that can be deployed in a wide variety of frequency bands. The LTE— SAE architecture reduces the number of nodes, supports flexible network configurations and provides a high level of service availability. LTE performance requirements Data Rate: Key Features of LTE contd.
Myung http: Myung] SAE [Source: User-plane Protocol Stack [Source: Control-plane protocol Stack [Source: Before the turbo coding, transport blocks are segmented into byte aligned segments with a maximum information block size of bits. Error detection is supported by the use of 24 bit CRC.
This generic frame structure is used with FDD. Alternative frame structures are defined for use with TDD. LTE frames are 10 msec in duration. They are divided into 10 subframes, each subframe being 1.
Each subframe is further divided into two slots, each of 0.
Slots consist of either 6 or 7 ODFM symbols, depending on whether the normal or extended cyclic prefix is employed [source: OFDM meets the LTE requirement for spectrum flexibility and enables cost-efficient solutions for very wide carriers with high peak rates.
OFDM uses a large number of narrow sub-carriers for multi-carrier transmission. The basic LTE downlink physical resource can be seen as a time-frequency grid.
The cyclic prefix is used to maintain orthogonality between the sub-carriers even for a time-dispersive radio channel. With 64QAM, each resource element carries six bits. The OFDM symbols are grouped into resource blocks.
What is LTE: Long Term Evolution Tutorial & Overview
The resource blocks have a total size of kHz in the frequency domain and 0. High PAPR requires expensive and inefficient power amplifiers with high requirements on linearity, which increases the cost of the terminal and also drains the battery faster.
SC-FDMA solves this problem by grouping together the resource blocks in such a way that reduces the need for linearity, and so power consumption, in the power amplifier. A low PAPR also improves coverage and the cell-edge performance.
Channels Transport channels In order to reduce complexity of the LTE protocol architecture, the number of transport channels has been reduced. Both the LTE air interface scheduler and the transport network contribute to the end-to-end jitter. Real-time end user applications e. Network dimensioning and in-built QoS 24 86 Radio Transport PM LTE Transport Confidential mechanisms have to assure that the end-to-end delay and delay variation budget of supported applications are not exceeded.
In principle, the user service related considerations above apply to both S1 and X2.
As described in chapter 2. Basically, implementing X2 latency significantly less than the radio link interruption time ms would have no benefit since those packets would have to wait at the Target eNB anyway.
Most user applications will tolerate such a very short-term delay increase. In particular, most of the handover messaging is performed in the latency-insensitive preparation phase. Timing-over-Packet, is used for eNB synchronization see chapter 6.
NSN recommendations on network performance can be found in chapter 3. TCP is typically used for applications and their respective protocols where reliability is important, e. In particular large file transfers music, video, SW download will benefit from these measures, if high service rates would be offered by the operator.
In any case, the transport network should be designed for low latency.Multiple Antenna Techniques MIMO employs multiple transmit and receive antennas to substantially enhance the air interface. Energy management issues in lte. In particular large file transfers music, video, SW download will benefit from these measures, if high service rates would be offered by the operator.
In this context, LTE systems represent an important milestone towards the so called 4G cellular networks.
In addition, when knowledge of the radio channel is available at the transmitter e. LTE is designed to meet carrier needs for high-speed data and media transport as well as high-capacity voice support well into the next decade. User-plane Protocol Stack [Source: