Overview of lte radio interface and radio network architecture for high speed, high capacity and low latency. Lte 301 mastering lte air interface award solutions. Mobile audio mobile file sharing 49 34 23 16 11 7 15. The present document has been developed within the 3rd generation partnership project.
Lte air interface training manual contents contents 1 the air interface. This white paper summarizes improvements specified in 3gpp release 11 with focus on the air interface. Reference point for the control plane protocol between eutran and mme. The physical layer is expected to perform the following functions in order to provide the.
Commonalities and difference in tdd and fdd tdd and fdd modes commonalities tdd and fdd modes differences regarding the air interface 1. Changes in the specification are limited to corrections and. A significant underlying feature of lteadvanced will be the flexible spectrum usage. It then provides an in depth explanation of the lte frame structure, channels, and multiple antenna techniques, and describes in detail how lte devices synchronize with the network, establish connections and exchange data over the air. Much of the lte standard addresses the upgrading of 3g umts to what will eventually be 4g mobile communications technology. Lte offers significantly higher packet data rates, enabling advanced multimedia applications and highspeed internet access. Fddlte air interface protocol telecom knowledge and. Reference point between eutran and serving gw for the per bearer user plane tunnelling and inter enodeb path switching during handover. Do you need to know what information elements are within each of the lte layer 1. Usually, after receiving a certain number of measurement reports, with the radio signal better from the target cell compared to the serving cell by a margin, the. Lte air interface is 3gpps long term evolution lte plan for current umtshspa based 3gpp networks. Pdf lte air interface training manual figures figures fadi.
Long term evolution lte is a leading contender for next generation broadband wireless networks, providing an evolution path for a variety of 3g wireless networks, such as umts and 1xevdo. A comparative introduction to major global wireless standards, technologies and their applications. Lte air interface and procedures design, deployment and. It is new air interface system, which provides high speed datarate, lower latency a nd is optimized for p acket data. Air interface concepts this chapter covers the radio aspects of lte, starting in section 2. He has a degree in physics and a phd in radio astronomy from the university of cambridge, and 20 years experience in scientific and technical. In lte technology band guard between subcarriers is of 15 khz and it is constant valued, independent from channel bandwidth. Ltea meets and exceeds all requirements for 4g as specified in imtadvanced. Lte air interface lte is 3gpps long term evolution lte. Jeanette wannstrom, for 3gpp, submission, june 20 in lteadvanced focus is on higher capacity. Lte in bullets 2nd edition pdf the content is aimed towards anyone wishing to learn the basics, or to develop a more thorough understanding. Because the lte mac is fully scheduled, qos is a natural fit. Lte in bullets pdf free download download long term evolution in bullets, 2nd edition free ebook pdf, epub, mobi by chris johnson.
Eps is divided into two parts lte part which deals with the technology related to a radio access network eutran and epc part which deals with the technology related to a core network. All in one openairinterface 4g and 5g reference software. Download it once and read it on your kindle device, pc, phones or tablets. Lte a has frequency reuse factor of 1 since spectrum is expensive, uses highorder mimo. One of the first things to note about lte is the integration between the frequency division duplex fdd and time division. Lte advanced air interface technology kindle edition by zhang, xincheng, zhou, xiaojin. This course focuses on the lte air interface and provides a detailed analysis of the structure and features of the physical layer, as well as the layer 2 and 3 protocols, before. Christopher cox is a professional technical trainer and consultant in mobile telecommunications.
The technical level of the answer depends on whether you have an understanding of wireless communications and electrical engineering. The framework for the lte advanced air interface technology is mostly determined by the use of wider bandwidths, potentially even up to 100 mhz, noncontiguous spectrum deployments, also. This course focuses on the lte air interface and provides a detailed analysis of the structure and features of the physical layer, as well as. Lte air interface protocols request pdf researchgate. Requirements of lte peak data rate up to 200 active users in a cell 5 megahertz less than 5 millisecond userplane latency 1. Openairinterface lte notes on a working oai lte project using the limesdr and target user equipment samsung galaxy s4 mini, mainly pointers to build guides used and summary of obstacles encountered. Lte ran dual connectivity epc across lte and nr control and user plane user plane 5g next gen core. Data transmission with an off the shelf cell phone up to 8mbps iperf with very limited range using two antenna for tx and rx proper. The gsm air interface is described here, first in general terms, examining the channels used by the mobile and the network to establish communications, then with increasing detail, the procedures and messages exchanged between the peer layers of the gsm protocol stack. Lte a meets and exceeds all requirements for 4g as specified in imtadvanced. Lte architecture supports hard qos, with endtoend quality of service and guaranteed bit rate gbr for radio bearers. The physical layer is expected to perform the following functions in order to provide the data transport service. This document presents the lte network architecture as the first technical document of lte area. Same radio interface schemes for both uplink and downlink ofdm and scfdma 2.
Lteadvanced air interface technology, zhang, xincheng, zhou. Lteadvanced air interface technology, zhang, xincheng. Aug 14, 2017 a comparative introduction to major global wireless standards, technologies and their applications. An introduction to mobile networks and mobile broadband, 3 rd edition provides technical descriptions of the various wireless technologies currently in use. Introduction in the current universal mobile telecommunications system umtshsxpa specifications, systems are capable of supporting high speed packet access for both downlink up to 14 mbps and uplink up to 5. Lte air interface training 2 days after completing this course, the audience will be able to. The access to these services is through the use of a transport channel via the mac sublayer.
In telecommunications, long term evolution lte is a standard for wireless broadband communication for mobile devices and data terminals, based on the gsmedge and umtshspa technologies. The radio resource control rrc protocol is used in umts and lte on the air interface. This course provides a good understanding of lte air interface technologies e. Architecture of the lte air interface wiley telecom books. Lte a can aggregate up to 5 carriers to make up to 100 mhz 4. Ltea can aggregate up to 5 carriers to make up to 100 mhz 4. Pdf lte air interface training manual figures figures. Use features like bookmarks, note taking and highlighting while reading lte advanced air interface technology. It then provides an in depth explanation of the lte frame structure, channels, and multiple antenna techniques, and describes in detail how lte devices synchronize with the network, establish connections and. Pdcp maps the upperlayer protocol characteristics to the lowerlayer air interface protocol characteristics and thus enables the lte protocol to bear ip packets between ue and e.
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. The content is presented in the form of bullet points to keep it concise and to allow rapid access to the key information. Use features like bookmarks, note taking and highlighting while reading lteadvanced air interface technology. Other layers above tnl are not related with the air interface. Using open air interface, sdr hardware and openepc core to create an endtoend experiment in phantomnet overview this tutorial will walk you through steps to create an endtoend lteepc network using softwaredefined radio sdr enodeb running open air interface software and usrp b210 rf hardware and an openepc core instance. Jul 03, 2016 the original ibm pc 5150 the story of the worlds most influential computer duration. Mar 15, 2012 christopher cox is a professional technical trainer and consultant in mobile telecommunications. Using open air interface, sdr hardware and openepc core to. The lte air interface physical layer offers data transport services to higher layers. The original ibm pc 5150 the story of the worlds most influential computer duration. The framework for the lteadvanced airinterface technology is mostly determined by the use of wider bandwidths, potentially even up to 100 mhz, noncontiguous spectrum deployments, also. Architecture and key features of lteadvanced networks.
Flexibility of deployment across various frequency bands with little needed modification to the air interface. A significant underlying feature of lte advanced will be the flexible spectrum usage. Lte air interface free download as powerpoint presentation. The following two sections describe the downlink and uplink modulation schemes in some detail and the last section examines the way in which lte uses multiantenna methods to improve performance. Lte air interface course description with the introduction of lte came the development of a new radio technology based on ofdma scfdma. But i cant see base station in my phone, phone is nexus 5x and i know it support lte band7 without problem.
This factsheet provides an overview of the new lte air interface, its future. It separates the transmission technology on tnl from the airinterface processing technology on eutran. Lte air interface signaling overview award solutions. It describes the air interface of lte, focusing on the access stratum protocol layers. Eutran is a radio access n etwork of 3gp ps long term evolution lte. It increases the capacity and speed using a different radio interface together with core network improvements. Lte long term evolution or the eutran evolved universal terrestrial access network, introduced in 3gpp r8, is the access part of the evolved packet system eps. Number of subcarriers varies between 72, in a 1,4 mhz channel, and 1200 in a 20 mhz channel. The protocols used in the air interface, from the viewpoint of the mobile. Lteadvanced remains the correct description for specifications defined from release 10 onwards, including 3gpp release 12. It explains the rationales behind their differing mechanisms and implementations while exploring. The driving force to further develop lte towards lteadvanced lte release10 was to provide higher bitrates in a cost efficient way and, at the same time, completely fulfil the requirements set by itu for imt advanced, also referred to as 4g. Lteadvanced air interface technology kindle edition by zhang, xincheng, zhou, xiaojin. How does the lte air interface work including uplink and.
I will assume you dont, so here is the rather simplified answer with a few shortcuts and omissions. This elearning course takes a look at the lte air interface and. This paper provides detailed coverage of the airinterface technologies and. Lte air interface adopts ofdma orthogonal frequency division multiple access for the downlink and scfdma singlecarrier frequency domain multiple access for the uplink.
The lte network called eps evolved packet system is an endtoend e2e all ip network. Ltes air radio interface is based on ofdmascfdma technology. Using open air interface, sdr hardware and openepc core. Although it is integrated in the lte standard, it can be regarded as a new air interface. Lte air interface signaling overview e award solutions. The main goal of the alliance is to create an ecosystem of industrialnonprofitacademic organizations to implement reference solution for 3gpp standards. The main requirements for the new access network are high spectral efficiency, high peak data rates, short round trip time as well as flexibility in frequency and bandwidth. Openairinterface oai software alliance aims to further the software towards future 3gpp releases for 5g. The coexistence is realized by specifying the time and frequency resources used from the existing standards, or in the neighborhood thereof. This course is provides indepth understanding of lte air interface known as eutra. It employs amc adaptive modulation and coding as well as a number of optional mimo multipleinput multipleoutput antenna techniques and interference management methods. The result of these radio interface features is significantly improved radio performance, yielding up to five times the average throughput of hspa. The course starts with basic structure of lte air interface. This elearning course takes a look at the lte air interface and nonaccess stratum nas signaling operations used to establish and maintain lte calls.
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