A transport block is a group of resource blocks with a common modulationcoding. 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. Pdf the lte radio interface key characteristics and performance. The purpose of developing this system is to keep 3gpp systems competent enough for decades to come. Rrc protocols the radio resource control rrc protocol is used in lte on the air interface, it is part of lte control plane. Lte tutorial tutorial on lte basics rf wireless world. Xi crossy uses lte that incorporates vari ous measures with regard to radio access technology, radio network configuration and radio interface protocol. This article provides an overview of the lte radio interface, together with a more indepth description of its features such as spectrum flexibility, multiantenna transmission, and intercell interference control. Overview of lte radio interface and radio network architecture for high speed, high capacity and low latency ntt docomo technical journal vol. Protocol states and mobility one of the main lte advantages is minimizing number of states transitions that led to huge saving in processor load.
This gives an adversary a chance to receive these messages and imsi inside. Pdf lte air interface training manual figures figures fadi. Lte 301 mastering lte air interface award solutions. Development of the long term evolution lte air interface has been closely linked within 3gpp to the work on a new packetswitched system architecture initially called the system architecture. Pdf lte air interface training manual figures figures.
The drive test result showed that he average downlink throughput of lte increased by 52% compared with lte 3m, and the gsm kpis kept stable. Lte security architecture 19 we will explore several lte defenses. Ue category maximum number of dlsch transport block. 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 explaining how these are used in the operation of the radio link from initial attach, through service delivery and. The lte downlink performance was improved significantly after the deployment of the gl spectrum concurrency solution. Lte a meets and exceeds all requirements for 4g as specified in imtadvanced. With the introduction of lte came the development of a new radio technology based on ofdma scfdma.
The access to these services is through the use of a transport channel via the mac sublayer. The air interface between lte network and ue supports high data rate owing to ofdm and multiple antenna techniques employed. Features latest lte technology releases, software defined radio sdr and software defined. Summary introduction to wireless lte 4g architecture and key. Lte air interface course description with the introduction of lte came the development of a new radio technology based on ofdma scfdma.
Stand alone device 19, 1 hu housing power supply 110 230v ac power consumption max. Lte air interface free ebook download as powerpoint presentation. The 3gpp long term evolution lte release8 specifications are designed to deliver higher peak data rates, higher throughput and lower air interface latency compared to 2g and 3g systems. Lte 4g cellular networks are gradually being adopted by all major operators in the world and are expected to rule the cellular landscape at least for the current decade. Overview of lte air interface figure 3 block diagram for dftsofdm an advantage for dftsofdm as a scfdma technique is that the numerology can match the ofdm downlink, with excellent spectral occupancy due to the ifft providing pulse shaping of the signal. Overview of lte airinterface technical white paper 3g4g. Architecture of the lte air interface an introduction to. Lte network architecture evolution node b rnc sgsn ggsn internet 3gpp rel 6 hspa user plane original 3g architecture. 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.
Air interface concepts this chapter covers the radio aspects of lte, starting in section 2. It describes the air interface of lte, focusing on the access stratum protocol layers. Ofdma is used from network to ue air interface and scfdma is used from ue to network air interface. The performance of lte and some of its key features is illustrated with simulation results. Long term evolution lte is 3gpp enhancement to the current cellular system in use. One single build including simulators and nos1 mode now a runtime option nos1 tun interface now used by default for ue, enbnos1, and uenos1 to use legacy kernel module, can be disabled using the nokrnmod 0. This second webinar discusses lte air interface, the link between a mobile device and the network, and a fundamental driver of the quality of the network. The cablefree lte platform is complete and includes base station, enodeb, remote radio head rrh, base band bb rf controller, evolved packet core epc and cpe devices to build complete 4g lte networks, includes all lte interfaces within the epc. Support for vehicular mobility and asymmetrical link. Lte air interface webinar aircom international youtube. Nov 04, 20 this second webinar discusses lte air interface, the link between a mobile device and the network, and a fundamental driver of the quality of the network. Lte uses the concept of a resource block, which is a block of 12 subcarriers in one slot.
Lte air interface and procedures design, deployment and. Overview of lte radio interface and radio network architecture for. How to verify your lte protocol and rf interactions. Ofdma types ofdm versus ofdma ofdma physical layer lte.
This paper presents some key characteristics of the lte radio interface, including physical layer and radio resource management functions. Lte air interface lte is 3gpps long term evolution lte. Lte is designed to have wider channels up to 20mhz, with low latency and p acket optimized radio access technology. Imsi is transmitted through lte air interface within plaintext messages. To reach these goals, a new design for the air interface is envisioned. 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. Mar 14, 2014 the air interface described in the chapter covers the concepts of lte frame structure, downlink and uplink scheduling, and detailed illustrations of the data flow across the protocol layers. The ebn sends and receives radio transmissions to all the mobiles using the analogue and digital signal processing functions of the lte air interface. It provides detailed description on lte radio interface, its structure. Tektronix air interface monitoring uu probe release 3 uu probe rel. The physical layer is expected to perform the following functions in order to provide the data transport service. The course starts with basic structure of lte air interface.
Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This course is provides indepth understanding of lte air interface known as eutra. The lte air interface physical layer offers data transport services to higher layers. It has following main functions according to 12, broadcast of. Sim cards and uicc tokens device and network authentication air interface protection uu backhaul and network protection s1mme, s1u lte s security architecture is defined by 3gpps ts 33. Lte of umts is required to remain competitive in the long term. Layer 2 of the lte protocol stack contains three sublayers, mac, rlc and pdcp as well as the control protocol rrc, and the main elements of each of these. It reveals the in depth information on lte air interface, in terms of technology, protocols and procedures. Lte a can aggregate up to 5 carriers to make up to 100 mhz 4.
With the introduction of lte came the development of a new radio technology based on. Lte air interface is 3gpps long term evolution lte plan for current umtshspa based 3gpp networks. Figure 2 shows the user plane protocol stacks for the lte network reference model shown in figure 1. Based on the eps entities and interfaces defined in chapter ii, the lte protocol stacks for the user plane and control plane are described in chapter iii. They will also form the starting point for further progress beyond the current generation of mobile cellular networks to chalk a path towards fifth generation mobile networks. As a result, the lte evolved radio access network ran is based on a completely new ofdm air interface. Lte a has frequency reuse factor of 1 since spectrum is expensive, uses highorder mimo. Mhz to 20 mhz, lte sae to provide up to four times the spectral efficiency of hsdpa release 6 deliver peak user data rates ranging up to 173 mbps and reduce latency as low as 10 ms leverage flat allip network architecture leverage a new air interface to significantly cut permbyte. At the conclusion of the study phase, 3gpp decided that the project objectives could not be entirely met by evolving hspa. 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. Architecture of the lte air interface wiley telecom books ieee. Physical layer procedures such channel coding, modulation, ofdm, resource blocks, signaling procedures and scheduling both in ul and dl. Lte air interface signaling overview award solutions. Lte s air radio interface is based on ofdmascfdma technology.
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