For a detailed list, please see the ies defined in lte rrc sap. Realistic rrc model simplified s1c, x2c and s11 models simplified epc. This tutorial has been designed for audiences with a need to understand the lte technology basics in very simple terms. The present document has been developed within the 3rd generation partnership project. This protocol controls mac, rlc and pdcp layers in the lte air interface connecting an lte ue with an enodeb. Good news is that basically there would be only two messages you have to dig into. Protocol specification eventstudio system designer sequence diagram based systems engineering tool.
Tutorial lte free download as powerpoint presentation. If nas messages are encapsulted in rrc messages, lterrc calls naseps dissector. The radio resource control rrc protocol is used in umts and lte on the air interface. Lte rrc connection setup lte long term evolution medium. Rrc s1mme sctp x2ap ip ethernet pdcp udp rrc s u nas linux ip stack. An overview of lte positioning 7 spirent white paper positioning architecture in lte networks positioning information exchange between the ue and the lte network is enabled by the lte positioning protocol. Ue capability information and rrc connection reconfiguration. Rrc connection setup message include default configuration for srb1 but can also include configuration information for pusch, pucch, pdsch physical channels, cqi reports, sounding reference signal, antenna configuration and scheduling requests. As defined by 3gpp, lte layer 2 structure consists of pdcprlcmac layers. Lte provides downlink peak rates of at least 100mbits, 50 mbits in the. Lte tutorial pdf, lte online free tutorial with reference manuals and examples. Lte tutorial lte stands for long term evolution and it was started as a project in 2004 by telecommunication body known as the third generation partnership project 3gpp.
Nr can reselect to lte eutra and lte can reselect to nr while they are in idle state. Lte tutorial free online lte training courses 3glteinfo free lte tutorials and training to get basic and in depth knowledge on various 3gpp long term evolution protocols and procedures. Mde bde rec cpri opticaltoelectrical converter electricaltooptical converter wcdma lte rrc filter dpd da quadrature modulation dup. Then, a detailed explanation on the lte authentication procedures and nas and as security setup procedures will be given in chapter iii hereof and again in part ii, lte security ii, that follows. This page covers lte rrc state diagram for ue compliant to lte standard. Enhancement of the utra optimisation of the utran architecture to ensure the continued competitiveness of the 3gpp technologies for the future lte was the first and only technology recognized by the next generation mobile network alliance to meet its broad requirements target deployment in 2010. Root raised cosine rrc filters and pulse shaping in.
An introduction to mobile networks and mobile broadband, 3rd edition provides technical descriptions of the various wireless technologies currently in use. Radio resource control rrc protocol writes the signaling messages that are exchanged between bs and mobile. How the information is transferred 925 radio resource control rrc medium access control mac physical layer phy logical channels transport channels control measurements layer 3 layer 2 layer 1. Rrc connection reconfiguration message when anything happens where ue need to trigger rrc connection reestablishment process as described above, ue sends rrc connection reestablishment request with the cause of one of the followings 36. In this document, we will explain nas and as security setup procedures to be performed based on k asme, and how data are transmitted in user and control planes after the. Sae system architecture evolution is the corresponding evolution of the gprs3g packet core network evolution. The enbs are interconnected with each other by means of the x2 interface. In lte security i1, part i of the lte security technical document, we have discussed lte authentication based on eps aka procedure and learned a ue and an mme get to share the k asme when authenticated. Type of information transferred transport channels. Long term evolution lte and system architecture evolution sae.
In lte, the transmission or reception of new data tofrom a ue in rrc idle state requires the establishment of an rrc connection. It is a layer that exists between ue and enb and exists at the ip level layer 3network layer. Otherwise, the ue initiates the tracking area update if it changed its tracking area since the last update. It explains the rationales behind their differing mechanisms and implementations while exploring the. Typical 5mhz lte 5mhz with 25 x 180khz lte 180khz prb physical resource block nbiot 200khz from 1 x 180khz 180khz from 12x15khz subcarriers ofdma downlink nbiot inband with lte nbiot lte guard band nbiot in 200khz gsm spectrum no guard nbiot in 200khz gsm spectrum with guard tbc nbiot excluded from central 6 prb 25x180k 4. Lpp is similar to protocols such as rrc, rrlp, and is801 already deployed in 2g and 3g networks2. Following are some of the points about ue in these modes. The 3gpp evolution for the 3g mobile system created the new base station system, called evolved umts terrestrial radio access network eutran and a new core network, called evolved packet core epc as a result of two standardisation projects. Sep 06, 2015 lte radio resource control rrc duration. Lte kpi hindiurdu best lecture for nokia,ericsson and huawei engineers. Lte identifiers presentation lte signaling protocol define a large number of identifiers for ues, rabs and signaling endpoints. The tutorial on lte also covers lte protocol stack, lte physical layer, lte network architecture and so on. A tutorial on lte evolved utran eutran and lte self organizing networks son by dhruv sunil shah presented to the faculty of the graduate school of. From rrc radio resource control connection establishment to ip address assignment.
The interaction of nr rrc and lte rrc can be illustrated as follows. Transmit receive data wcdma lte baseband signal generatorprocessor electricaltooptical converter opticaltoelectrical converter. The diagrams below show the structure for the downlink and uplink of layer 2. Mac multiplexes rlc links and manages scheduling and priority handling via logical channels. Lte mobile optimization a definitive guide white paper. Lte phy overview electrical and computer engineering. Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low. Nov 15, 2012 this document will also help developerto start thinking design of rrc in lte. Rrc connection mobility including intrafrequency and interfrequency handover, associated security handling, i. Pdf version quick guide resources job search discussion. Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. Ofdm basics, lte channels, signaling procedures and mimo are covered. Lte uu eutran mme s11 serving s5 gateway pdn gateway. Lte tutorial tutorial on lte basics rf wireless world.
Technical overview of 3gpp lte indian institute of. 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. There are a good news and a bad news on rrc messages for carrier aggregation. Narrowband iot data transmission procedures for massive. The control plane includes the radio resource control layer rrc which is responsible for configuring the lower layers.
The presentation covers the imsi, guti, gummei, imeisv, rnti, tai and apn. But when nr is in rrc inactive state, nr rrc inactive can reslect to eutra, but. Lte release 9 technology introduction white paper the lte technology as specified within 3gpp release 8 was first commercially deployed by end 2009. Overview of lte security procedure lte authentication. Lte physical layer which in itself is a very large and featurerich topic, particularly as there are different modes of operation fddtdd and different downlink and uplink access technologies ofdma, scfdma, along with. Lte eutran and its access side protocols radisys white paper 2 eutran the eutran consists of enodebs enb which provide eutra user plane pdcprlcmacphy and control plane rrc protocol terminations toward the user equipment ue. Jun 04, 2017 establishing an rrc connection in lte typically involves the following steps lte rrc connection setup is published by eventhelix in lte long term evolution. Protocol signaling procedures in lte radisys white paper 5 rrc connection and initial attach procedure after the random access procedure, if the ue is not already attached to the network it has to do so by initiating the attach procedure. Radio resource control rrc for lte the wireshark wiki.
The goals for lte include improving spectral efficiency, lowering costs, improving services, making use of new spectrum and reformed spectrum opportunities, and better integration with other open standards. The universal mobile telecommunications system umts, based on the gsm standards, is a mobile cellular system of third generation that is maintained by 3gpp 3rd generation partnership project. Visualether protocol analyzer wireshark based visual protocol analysis and system design reverse engineering tool. Overview of lte radio interface and radio network architecture for high speed, high capacity and low latency ntt docomo technical journal vol. Ue must make the transition to rrc connected mode before transferring any application. Ue must make the transition to rrc connected mode before transferring any application data, or completing any signalling procedures. This lte tutorial covers rrc layer state diagram used by lte ue. Radio resource control rrc medium access control mac physical layer phy logical channels transport channels control measurements. Lte radio layer 2, rrc and radio access network architecture. Lte is the latest generation of the 3gpp standards.
Frequency division duplexing fdd and time division duplexing tdd both paired and unpaired. Opensource software based implementation of 3gpp lte rel 89 including features from lteadvanced rel 101112, lteadvancedpro. Would you like to find out more about lte, but have little time to devote to it. Systems beyond imt2000 imtadvanced is set to introduce evolutionary path beyond 3g. Sr reestablishes the rrc connection between the ue and the enb, and user plane bearers. Overview of lte radio interface and radio network architecture for high speed, high capacity and low latency special articles on xi crossy lte servicetoward smart innovation lte radio interface and radio network architecture high data ratehigh capacitylow latency 1. Lte is a trade mark of etsi currently being registered for the benefit of its members reception of the rrcconnectionsetup by the ue. Lte physical layer which in itself is a very large and featurerich topic, particularly as there are different modes of. Lte protocol architecture lte protocol architecture around phy logical channels. This tutorial will give you enough understanding on lte technology from where you can take yourself at higher level of expertise. Lte tutorial presentation lte presentation with audio narration. The ns3 lte module by the lena project nicola baldo nicola.
Rrc connection reconfiguration for measuring the second cell. This lte tutorial covers lte basics, lte features, lte air interface, lte channels and lte frame structure. Lte protocol stack layers lets have a close look at all the layers available in eutran protocol stack which we have seen in previous chapter. A comparative introduction to major global wireless standards, technologies and their applications from gsm to lte advanced pro and 5g. Lte tutorial for beginners learn lte online training. A tutorial on lte eutran and lte self organizing networks son. If so, this paper will help get you up to speed in no time. This document will also help developerto start thinking design of rrc in lte. A brief description of each procedure will be given below first.
On the user plane, packets in the core network epc are encapsulated in a specific epc protocol and tunneled. Transport channels are located between the physical layer and mac layer. The main services and functions of the rrc sublayer include. Lte stands for long term evolution and it was started as a project in 2004 by telecommunication body known as the third generation partnership project 3gpp. Lte has become the fastest developing mobile system technology. It specifies a complete network system and the technology described in it is. After rrc connection establishment, the ue transits to rrc connected state and the. Root raised cosine rrc filters and pulse shaping in communication systems erkin cubukcu abstract this presentation briefly discusses application of the root raised cosine rrc pulse shaping in the space telecommunication. Since then the number of operators implementing the technology is strongly increasing around the globe. Lte standard has been published by 3gpp as an extension of umtsbased on 3gpp standard and 1xevdobase on 3gpp2. Establishing an rrc connection in lte typically involves the following steps lte rrc connection setup is published by eventhelix in lte long term evolution.
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