Lte air interface, channel mapping in lte air interface, control and data regions in lte air interface. The course starts with basic structure of lte air interface. Aug 11, 2009 utran interfaces are the most important point to start learning about the whole system. This instruction makes use of emulation platform to analyze the control plane and data plane of lte protocol stack. Some advanced forms of transmission multiplexing combine frequency and time division approaches like. Fundamentals of lte by arunabha ghosh, lte, the umts long term evolution. The proposed air interface is capable of providing backwards compatibility with current radio technologies, such as long term evolution lte and the. The umts world is an 3g mobile system news and information provider.
In this tutorial you can learn the following topics. A survey of multimedia streaming in lte cellular networks. Ofdma types ofdm versus ofdma ofdma physical layer lte channels. Lte air interface is 3gpps long term evolution lte plan for current umtshspa based 3gpp networks. Gsmonly mobile stations mss will be connected to the network via the gsm air radio interface um. Development of the long term evolution lte air interface has been closely linked within 3gpp to the work on a new packetswitched system. Mohammad tawhid kawser is an assistant professor at the electrical and. The new physical layer is key to the level of performance that lte must deliver and much flexibility has been incorporated to cope with varying allocations of spectrum, as well as the workbook in both printed and searchable electronic formats, attendees receive a specially produced lte air interface acronym list. In the lte protocol architecture for user plane top and control plane bottom, layer1 and layer2 air interface protocols terminate in the wireless device and in the enb. Same radio interface schemes for both uplink and downlink ofdm and scfdma 2. Your best bet is to learn about lte air interface foundations.
Overview of lte radio interface and radio network architecture for high speed, high capacity and low latency. The layer2 protocols include the mac protocol, the rlc protocol, and the pdcp. Review merge requests code quality adherence to architecture oai opensource solutions for 5g. Ofdma is used from network to ue air interface and scfdma is used from ue to network air interface. The air interface involves both the physical and data link layers layer 1 and 2 of the osi model for a connection. Lets have a close look at all the layers available in eutran protocol stack which we have seen in previous chapter.
This nas layer terminates at mme and enb shall silently pass the nas messages to mme. Lte m, x2 interface and handover, cudu split f1 interface, cdrx, embms ue, multi rru support continuous integration lte m. Lte air interface free ebook download as powerpoint presentation. Comprehensive coverage of umts 3g news, licensing, business developments, 3g wcdma telecommunication technology, multi media mobile phones and future communications. Interface is the only fully x86based sdr solution in opensource, providing both ue, enb, and corenetwork functionality. 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. As a reference, longterm evolution lte air interface. The tutorial on lte also covers lte protocol stack, lte physical layer, lte network architecture and so on. Umts interfaces protocols on different interfaces standard numbers and links to the different standards.
This page covers lte advanced architecture and lte advanced protocol stack. The incredibly higher data rates and better quality of services provided by lte have motivated the advent and use of many different applications. Opportunities are at hand for professionals eager to learn and apply the latest theories and practices in air interface technologies. Lte standard has been published by 3gpp as an extension of umtsbased on 3gpp standard and 1xevdobase on 3gpp2 standard technologies. It uses stream control transmission protocol sctp as the transport protocol 10 l1 u e rlc mac pdcp rrc nas l1 rlc mac pdcp l1 l2 ip sctp s1ap relay l1 sctp s1ap nas l2 ip l t e u u en od b s 1 m m e m m. Interfaces and their protocol stacks after familiarising with main network elements, time has come to better know interfaces between those elements.
Lte uses orthogonal frequency division multiple access ofdma for downlink transmission to achieve high peak data rates in high spectrum bandwidth. Lte air interface lte is 3gpps long term evolution lte. Figure 2 shows the user plane protocol stacks for the lte network reference model shown in figure 1. Handover between lte and 3g radio access technologies. The place for air interface how 4g works howstuffworks. Lte a can aggregate up to 5 carriers to make up to 100 mhz 4. This document presents the lte network architecture as the first technical document of lte area. Openairinterface 5g overview, installation, usage florian kaltenberger joint etsi osa workshop, sophiaantipolis, 11. Lte m, x2 interface and handover, cudu split f1 interface, cdrx.
Kawser is the author of lte air interface protocols 0. The processing in the access strata as of the protocol stack depends on the quality. The physical layer is expected to perform the following functions in order to provide the data transport service. The lte air interface physical layer offers data transport services to higher layers. 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 enode b through transparent transmission provides for the upper layer. The channels in lte system are mainly categorized into logical, transport and physical channels based on their functions. The radio protocol architecture for lte can be separated into control plane architecture and user plane architecture as shown below at user plane side, the application creates data packets that are processed by protocols such as tcp, udp and ip, while in the control plane, the radio resource control rrc protocol writes the signalling messages that are exchanged between the base station and. 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. Device model oneplus 8 pro 5g standard edition dual sim td lte na 128gb in2025 bbk galilei updated 8 days ago device model oneplus 8 pro 5g premium edition dual sim td lte na 256gb in2025 bbk galilei updated 8 days ago device model oneplus 8 pro 5g premium edition global dual sim td lte 256gb in2023 bbk galilei updated 8 days ago. Long term evolution lte, based on the 3gpp standards, is the latest step in the evolution of cellular services. It separates the transmission technology on tnl from the air interface processing technology on eutran. The air interface, or access mode, is the communication link between the two stations in mobile. 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. Lte air interface free download as powerpoint presentation.
Overview of lte and lte advanced new features 151 7. Lte advanced architecture lte advanced protocol stack. B4 17002100 aws 1 b18 800 lower b19 800 upper b21 1500 upper b23 2000 sband b24 1600 lband. Radio protocols for lte and lte advanced pdf provides a unique focus on radio protocols for lte and lte advanced lte a. Commonalities and difference in tdd and fdd tdd and fdd modes commonalities tdd and fdd modes differences regarding the air interface 1. Utran interface between rnc and the packetswitched domain of the cn iu ps is used for ps data and the utran interface between rnc and the circuitswitched domain of the cn iucs is used for cs data.
Lte long term evolution is a fourth generation cellular network technology that provides improved performance compared to legacy cellular systems. Interfaces and their protocol stacks lte and beyond. 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. The layer3 rrc protocol also terminates in both the wireless device and the base station. Lte is mainly designed for high speed data applications both in the uplink and downlink. Development of the long term evolution lte air interface has been closely linked within 3gpp to the work on a. The lte network called eps evolved packet system is an endtoend e2e all ip network. Interfaces and their protocol stacks lte and beyond tech. The pdcp protocol supports efficient transport of ip packets over the radio link. Virtualized 5g air interface protocol stack for multicell. Radio protocols for lte and lte advanced pdf provides a unique focus on radio protocols for lte and lteadvanced ltea. A similar closedsource development commercialized by amarisoft lte 100 which targets several usrp platforms provides enb and corenetwork functionality on standard linuxbased pcs 6. The access to these services is through the use of a transport channel via the mac sublayer.
For the protocol plane, the protocol structure involves two layers. The functions of the key layers of the protocol stacks are briefly described below. Written by experienced researchers and professionals, lte advanced air interface technology thoroughly covers the performance targets and technology components studied by 3gpp for lte advanced. Lte s air radio interface is based on ofdmascfdma technology. All the feature of lte where you will explore lte in yourself. Ltes air radio interface is based on ofdmascfdma technology. Lte a meets and exceeds all requirements for 4g as specified in imtadvanced. More specifically, we trace system information, mac, and rrc in. Takes care of the link adaptation amc, power control, cell search. Jul 04, 2016 irat ho srvcc, csfb, cco, and rwr, measgap, x2ho, harq, tti bundling, drx, qos, carrier aggregation, icic, eicic. That socalled language is the air interface, the standardized communications protocol that your mobile device uses to communicate with a base station. This course is provides indepth understanding of lte air interface known as eutra.
Uu, x2, s1, s11 0 lte bandwidths, bit rates and ue categories 0 summary of radio access techniques 0 eutran protocol stack. Start reading radio protocols for lte and lte advanced on the free kindle reading app or on your kindle in under a minute. Requirements of lte peak data rate up to 200 active users in a cell 5 megahertz less than 5 millisecond userplane latency 1. Protocol states and mobility one of the main lte advantages is minimizing number of states transitions that led to huge saving in processor load. The radio protocol architecture for lte can be separated into control plane architecture and user plane architecture as shown below at user plane side, the application creates data packets that are processed by protocols such as tcp, udp and ip, while in the control plane, the radio resource control rrc protocol writes the signalling messages that are exchanged between the base. Interfaces are allowing mme, sgw and pgw cooperating with other network elements e. The book provides detailed coverage of the air interface technologies and protocols that withstood the scrutiny of the highly sophisticated technology evaluation process typically used in the 3gppphysical layer working group. The air interface is the radiobased communication link between the mobile station and the active base station. Lte interfaces and protocols telecommunications blog. If youve ever seen a smartphone commercial commence scoffing, youve seen the acronyms for various air interfaces, such as 4g lte, wimax worldwide interoperability for microwave access. Lte a has frequency reuse factor of 1 since spectrum is expensive, uses highorder mimo. This course is your one shop stop in order to learn quickly about.
Jan 08, 2012 interfaces and their protocol stacks after familiarising with main network elements, time has come to better know interfaces between those elements. Start reading radio protocols for lte and lteadvanced on the free kindle reading app or on your kindle in under a minute. Understanding lte air interface and eutran ltes physical. The protocols used in the air interface, from the viewpoint of the mobile. Lte advanced protocol stack consists of user plane and control plane for as and nas. Rrc is the protocol that is used for communication between ue and enb. A significant underlying feature of lte advanced will be the flexible spectrum usage. Giving readers a valuable understanding of lte radio. 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. Lte advanced architecture for eutran consists of pgw,sgw,mme,s1mme,enb,henb,henbgw, relay node etc. Lteuu interface air interface of eutran based on ofdma in downlink and sc fdma in uplink fdd and tdd dupl ex methods scalablebandwid th1.
Lte tutorial tutorial on lte basics rf wireless world. This course assumes you already have a basic understanding of cellular network and wireless communications. Lte introduces an enhanced air interface as well as a flat, allip. Fddlte air interface protocol telecom knowledge and. Pdf efficient resource allocation and sectorization for. Unleashing the potential of opensource in the 5g arena. Other layers above tnl are not related with the air interface.
The air interface, or access mode, is the communication link between the two stations in mobile or wireless communication. From theory to practice by stefania sesia, 4g lte lte adv. Physical layer carries all information from the mac transport channels over the air interface. This course will cover the major aspects of the lte air interface in a manner that both technical and nontechnical people will be able to fully appreciate. Below is a more ellaborated diagram of eutran protocol stack. Lte air interface foundations explained techtrained.107 1040 452 142 1379 1157 1223 573 940 610 839 427 427 1171 880 680 160 1001 1487 962 1257 450 585 1184 18 875 1551 623 1522 95 139 197 864 355 1022 247 1215 523