A tutorial on beam management for 3gpp nr at mmwave. System overview, product development, and test challenges application note. 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. The design of the lte physical layer phy is heavily influenced by the requirements for high peak transmission rate 100 mbps dl50 mbps ul, spectral efficiency, and multiple channel bandwidths 1. Will first study lte release 8, then enhancements from releases 912 peter a.
This overview covers both lte fdd type 1 signals and lte tdd type 2 signals described in the standard documents listed in. 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. Systems beyond imt2000 imtadvanced is set to introduce evolutionary path beyond 3g. Type 1 uses frequency division duplexing uplink and downlink separated by frequency, and tdd uses time division duplexing uplink and downlink separated in time. Physical layer layer 1 physical layer carries all information from the mac transport channels over the air interface. Lte provides a packet switched model at the sap, but retains a circuit switched model at the phy.
The design of the lte physical layer phy is heavily influenced by the requirements for high peak transmission rate. Overview of lte physical layer duplex telecommunications. Commercial in confidence 20190612 outline spectrum modulation, numerology, frame structure initial access control channel reference signals. It provides an overview of frequency bands, frequency division duplex fdd and time division duplex tdd methodologies, flexible bandwidths, time framing, and time. In the 3gpp terminology, a physical channel corresponds to a set of resource elements carrying information originating from higher layers, whereas a physical. In nr, the timefrequency resources resource elements represent either physical channels or physical signals, as in lte. Physical layer modeling of an lte system in matlab. An overview of 5g layers in the first topic, 5g nr. Lte overview 3 december, 2009 standard status 11 long term evolution release 8.
A comprehensive analysis of the lte physical layer fahimeh rezaei, m. Key differences between the physical layers of lte and nr key new technologies in nr physical layer overview of the nr physical channels most important new nr physical layer procedures. Understanding the 5g nr physical layer 3 low latency minislots cbg retransmissions. Overview of lte physical layer free download as powerpoint presentation. Overview long term evolution lte is the next step forward in cellular 3g services. The basic timedomain unit in dynamical scheduling on lte is one subframe.
Prerequisites reasonably good technical knowledge of the lte physical layer and the lte. This whitepaper presents an overview of the lte physical layer which in itself is a. Type 1 uses frequency division duplexing uplink and downlink separated by frequency, and tdd uses time division duplexing uplink. The data on the interface between the physical layer and the medium access control mac is in the form of transport blocks or of control information of the physical layer. First, the physical layer model can be used to simulate whether a transport block, which is referred to as the data received by the physical layer from the upper layer, can be transmitted successfully over the physical channel. This overview is not an exhaustive description of the physical layer, but is intended to provide you with a useful background when you configure the 89600 vsa lte demodulator to make measurements. Wifi direct discovery two step asynchronous message based discovery wfd device exchanges device discovery request response messages followed by service discovery with every wfd in range. An overview of the nr rrc and mac protocols is included in chapter 1 for completeness, with particular focus on the role of the rrc and mac protocols in relation to layer 1. Lte uu eutran mme s11 serving s5 gateway pdn gateway. An important feature in lte is its adoption of radio resource management rrm procedures which.
Lte, the long term evolution systems is the major milestone in stepping towards 4g evolution. The medium for the two directions of transmission uses two matching bandwidths in the frequency division duplex fdd mode or a single bandwidth in the time division duplex tdd mode. As an essential component in ns3, the physical layer model plays two important roles. The type 1 structure is used for frequency division duplex fdd mode. The lte physical layer supports two types of frame structures as types 1 and 2. Key differences between the physical layers of lte and nr key new technologies in nr physical layer overview of. Wfd message based discovery vs lte direct broadcast discovery. Jul 18, 2017 lte physical layer overview there are two types of frame structure in the lte standard, type 1 and type 2. Pdf overview of the 3gpp long term evolution physical. Sae system architecture evolution is the corresponding evolution of the gprs3g packet core network evolution. Matlab and communications system design modeling and simulation simulation acceleration path to implementation case study.
Expected in the 2008 time frame, lte is a 3gpp standard that provides for an uplink speed of up to 50 megabits per second mbps and a downlink speed of up to 100. Lte physicallayer overview peter wang january, 16, 2011 2. We describe the fundamental concepts of 5g nr, explain in detail 14the design of physical channels and reference signals, and share the. Specifically, this chapter will overview the ltea network, as well as its capabilities and protocols, with specific emphasis on the physical layer and medium access sublayers to illuminate. Type 1 lasts 10 ms equivalent to 10 subframes each 1 ms long or 20 slots each 0. 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. Location of groups depends on the physicallayer cell identity. System overview, product development, and test challenges application note this application note describes the long term evolution lte of the.
Principles, models and technology components explains fundamental physical layer design principles, models and components for the 5g new radio access technology 5g new radio nr. Following figure depicts lte physical layer transmitter part of enodeb i. This tutorial provides an overview of recently proposed measurement techniques for beam and mobility management in mmwave cellular networks, and gives insights into the design of accurate, reactive and robust control schemes suitable for a 3gpp nr cellular network. The physical layer itself maintains the continuous connection model, especially on the downlink, where there is continuous transmission.
Overview of the lte physical layer understanding lte with. Physical layer phy transport channels layer 2 layer 1. We describe the fundamental concepts of 5g nr, explain in detail 14the design of physical channels and reference signals, and share the various. Lte radio layer 2, rrc and radio access network architecture. Scheduling in lte gwanmo ku adaptive signal processing and information theory research group apr. Physical layer uses timefrequency resources for transmission. What makes 5g better than lte, i discussed about the major enhancements that 5g exhibits over the current lte technology. Our focus is lte and lteadvanced goals and requirements, comp lete system architecture, core network evolved packet system, lte channel and physical layer will first study lte release 8, then enhancements from releases 912 peter a. Lte physical layer enodeb and ue physical layer in lte.
The term lte is typically used to represent both lte and sae. In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on a specific network drive within etsi secretariat. Specifically, this chapter will overview the lte a network, as well as its capabilities and protocols, with specific emphasis on the physical layer and medium access sublayers to illuminate. Long term evolution protocol overview nxp semiconductors. Prerequisites reasonably good technical knowledge of the lte physical layer and the lte radio protocols is highly recommended but not compulsory.
Radio interface protocol architecture around the physical layer figure 1 shows the eutra radio interface protocol architecture around the physical layer layer 1. Overview of the 3gpp long term evolution physical layer 1 1 introduction the 3gpp long term evolution lte represents a major advance in cellular technology. Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low. Overview of the 3gpp long term evolution physical layer. 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. Do you need to know what procedures are triggered in the eps network and how. Overview of the lte physical layer understanding lte. This chapter discusses the physical layer phy specifications of the long term evolution lte standards. Takes care of the link adaptation amc, power control, cell search for initial synchronization and handover purposes and other measurements inside the lte system and between systems for the rrc layer. Physical resource block an overview sciencedirect topics. For a more in depth explanation of lte, see the 3gpp long term evolution. Lte is the latest generation of the 3gpp standards.
Although written in 2007, this technical white paper provides a comprehensive introduction to the physical layer of lte including basic design concepts, channels, signals, and coding. Lte physical layer overview peter wang january, 16, 2011 2. Jan 31, 2014 this chapter discusses the physical layer phy specifications of the long term evolution lte standards. Lte direct discovery devices broadcast their services at physical layer using 128. Generation partnership project 3gpp introduced long term evolution lte as the 3. 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. Lte physicallayer overview peter wang january, 16, 2011. Lte is designed to meet carrier needs for highspeed data and media transport as well as highcapacity voice support well into the next decade. There are two types of frame structure in the lte standard, type 1 and type 2. Physical layer robert baldemair ericsson research 20190612. Overview of the 3gpp long term evolution physical layer nxp. Physical layer lte and lte advanced wiley online library. Goals and requirements, comp lete system architecture, core network evolved packet system, lte channel and physical layer. Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g.
The physical layer models include radio wave propagation and hardware impairments for the full range of frequencies considered for the 5g nr up to 100 ghz. Physical layer overview and performance ieee communication theory workshop 2018 amitabha ghosh. Unlimited viewing of the articlechapter pdf and any associated supplements and figures. Location of groups depends on the physical layer cell identity. This article will describe the changes along with their purposes for each of the 5g nr layers. Type 1 uses frequency division duplexing uplink and slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Physical resources, resource unit, scheduling unit radio protocol architecture. Summary this chapter discusses the physical layer phy specifications of the long term evolution lte standards. Steenkiste, cmu 4 purpose, motivation, and approach to 4g ultramobile broadband access. This technical white paper provides an overview of the lte physical layer phy, including technologies that are new to cellular such as orthogonal frequency.
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