This chapter presents an overview of the lte lte advanced protocol structure with the intent to describe where important functions reside in the eutran and epc nodes, protocol layer terminations at various access and core network nodes, as well as the functional split between the eutran and the epc. Lte enb stack is implemented in c using the latest industry standards for improved safety and performance. A unified protocol stack solution for lte and wlan in future mobile converged networks article pdf available in ieee wireless communications 216. It consists of highly modular shared libraries implementing logically divided subsets of lte enb functionalities.
An uplink packet is then described, highlighting any differences. This video gives overview of lte air interface protocol stack. Design, deployment and performance of 4glte networks addresses the key practical aspects and best practice of 4g networks design, performance, and deployment. Pages idle state ue when dl data arrives for the ue.
Jeffrey cichonski joshua m franklin michael bartock s. Lte user layer 2 protocol stackthe plan is composed of three substrates, as shown in the figure packet layer packet data convergence protocol pdcp. Why long term evolution lte telecom protocol testing course. It talks about nas, rrc, pdcp, rlc, mac, and physical layer. It is designed in ansi c for flexibility and scalability, and is easy to customize and upgrade. Lets have a close look at all the layers available in eutran protocol stack which we have seen in previous chapter. This chapter presents an overview of the ltelteadvanced protocol structure with the intent to describe where important functions reside in the eutran and epc nodes, protocol layer terminations at various access and core network nodes, as well as the functional split between the eutran and the epc. I can tell you that at the moment it is one of the most useful book on lte we have and it allows us to save a lot of time while we are developing lte protocol stack. Developers can connect the protocol stack to be tested to a virtual tester via an ip connection.
Our results suggest that the lte protocol stack can operate synchronously, thus. The x2 interface is defined between two neighbour enbs. In lte, information is organized as a function of frequency as well as time, using a resource grid. Mar 14, 2014 design, deployment and performance of 4glte networks addresses the key practical aspects and best practice of 4g networks design, performance, and deployment. Generation 4g technologies such as long term evolution lte.
Tcs has developed lte user equipment ue protocol stack solution conforming to latest 3gpp release specifications. Lte user plane layer consists of upper layers,nas,pdcp,rlc,mac,phy and rf. Ue, enb, sgw, pgw and a remote host in the internet. Jul 14, 2015 lte protocol stack mac,rlc,pdcp slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Long term evolution protocol overview nxp semiconductors. If you continue browsing the site, you agree to the use of cookies on this website. Lte protocol stackuser control plane protocol layers in lte. This model includes the lte radio protocol stack rrc, pdcp, rlc, mac, phy. Lte layer 2 user plane protocol stack in detail teletopix. Layer 2 consists of an implementation of the mac, rlc and pdcp protocols. Lte l2 protocol stack, acts as interface between wireless sources of packet data traffic and lte phy layer and helps l1 to be used efficiently for packet data traffic. Lte or long term evolution is defined as a base for highspeed wireless communications for data terminals and mobile devices that are based on the gsm, cdmawcdma, umtshspa, and edge.
Additionally the mme is connected to the cbc via the sbc interface. Pdf a case study on protocol stack integration for 3gpp lte. The protocol stack or network stack is an implementation of a computer networking protocol suite or protocol family. The sctp is used for reliable transport of control and signaling information.
Below diagram is a more ellaborated explaining eutran protocol stack. Effect of network protocol and application behavior on performance junxian huang8 feng qian9 yihua guo8 yuanyuan zhou8 qiang xu8 z. Sep 21, 2015 lets have a close look at all the layers available in ue protocol stack. Nr radio protocol stack architecture is almost same as lte radio protocol stack architecture.
International journal of trend in research and development, volume 25, issn 23949333. 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. Mar 01, 2016 this video gives overview of lte air interface protocol stack. This page on lte protocol stack describes user plane and control plane protocol stack layers in lte. This paper provides an overview of the mac for 3gpp long term evolution lte also referred to as eutran, with a focus on the handset or user equipment ue. Sep 18, 20 lte user layer 2 protocol stackthe plan is composed of three substrates, as shown in the figure packet layer packet data convergence protocol pdcp. The figures below diagram the key protocol stacks on uu, s1, and x2 interfaces for both cplane and uplane messaging. This is a must do course any one aspiring to get into telecom lte protocol testing domain. Complete lte protocol stack for small cell products. According to the spokesman, the main functions of the pdcp are header compression, security. The radio protocol architecture for lte can be separated into control plane architecture and user plane architecture as shown in figure 3 and figure 4. Physical layer layer1 physical layer carries all information from the mac transport channels over the air interface.
It consists of highly modular shared libraries implementing logically divided subsets of lte ue functionalities. Currently, octave code is available for test and simulation of downlink transmit and receive functionality. Know protocol stack of lteuu radio interface know the main physicalrrcnas layer procedure know protocol conformance testing of 4glte terminal. Interfaces and their protocol stacks lte and beyond. 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. In lte architecture, core network includes mobility management entity mme, serving gateway sgw, packet data network gateway pdn gw where as eutran has eutran nodeb enb. Lets have a close look at all the layers available in ue protocol stack. Lte advanced protocol stack consists of user plane and control plane for as and nas. Lte security is markedly more secure than its predecessors. Pdcp packet data convergence protocol, rlc radio link control, and. Physical layer layer 1 physical layer carries all information from the mac transport channels over the air interface.
Because the final 3gpp specification will cover tens of thousands of pages, this. The layer3 rrc protocol also terminates in both the wireless device and the base station. Interfaces and their protocol stacks lte and beyond tech. Some of these terms are used interchangeably but strictly speaking, the suite is the definition of the communication protocols, and the stack is the software implementation of them individual protocols within a suite are often designed with a single purpose in mind. The downlink direction from network to terminal is covered first.
Lte control plane layer covers upper layers, nas, rrc, phy and rf. Great document and easiest visualisation of protocol stack. This layer processes rrc messages in control plane and ip packets in user plane. International journal of trend in research and development. Protocol overview this whitepaper presents an overview of the protocol stack for lte with the intent to describe where important functions reside along with the implications of such architectural design. Over the years i have seen the telecom industry struggling to get right. Smallcellstack provides a complete lte protocol stack that is portable to almost any baseband chip and operating system. Below is a more ellaborated diagram of eutran protocol stack. I found it by chance some weeks ago on your website and i decided together with my colleagues to buy it on. Physical layer layer 1 physical layer carries all information from. The design is such that they are layers with protocols for interworking between layers network entities. Lte is now the dominant air interface technology across the united states and is seeing rapid adoption in countries across the globe. These applicability statements are based on the features implemented in the ue.
Lte protocol stack physicalrrcnas layer procedure of 4g lte terminal protocol conformance testing of 4g lte terminal. In addition, the book focuses on the endtoend aspects of the lte network architecture and different deployment scenarios of commercial lte networks. This paper provides an introduction to how the lte protocol stack operates. Lte advanced architecture for eutran consists of pgw,sgw,mme,s1mme,enb,henb,henbgw, relay node etc. Michael bartock jeffrey cichonski it specialist security national institute of standards. Do you want to work as professional at a high standard organization. If you are already familiar with lte protocol stack or general concept of radio protocol stack, you would not need to spend too much time in reading this page. The course is lead by an expert trainer and will take you through all the way from fundamentals to deep down lte core protocol related aspects. The lte layer 2 userplane protocol stack is composed of three sublayers.
Ue protocol stack consists of implementation of layer 2 and layer 3 on the access stratum part. The x2 controlplane interface defines control and signaling transport between two neighbor enbs. While reading an article on lte, i came across a term lte stack protocol development. S1, s3, s4, s5 or s8, s6a, s10, s11, s and x2 interfaces of the lte network. These entities and protocols reside within the sgw, pgw and mme nodes, and partially within the. All protocol stacks s5 protocol stack, s1u protocol stack and the lte radio protocol stack specified by 3gpp are present. Thanks to that lte ue stack as a whole or in chosen parts can be easily tailored to meet specific needs of a. Introduction to longterm evolution lte prepared by. Development of lte ue protocol stack at non access stratum layer. Know protocol stack of lte uu radio interface know the main physicalrrcnas layer procedure know protocol conformance testing of 4g lte terminal. Lte or long term evolution is defined as a base for highspeed wireless communications for data terminals and mobile devices that are based on the gsm, cdmawcdma, umtshspa, and edge technologies. Interfaces are allowing mme, sgw and pgw cooperating with other network elements e. Besides these methodological contributions, we make the following insightful observations about lte network usage.
Lte test scenarios then verify the behavior of the protocol stack on the wireless device end. The user plane protocol stack between the enode b and ue consists of the following sublayers. Did you set your sights on telecommunication filed. A case study on protocol stack integration for 3gpp lte evolved node b. These layers are implemented differently in each wireless protocol. Please do write me on the email given in the pages below to improve.
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. Now that we covered each layer of lte protocol stack, it is time to combine all these layers to a complete protocol stack. Information flow could be divided into two groups, one is control plane, and the other is user plane. The challenge in finding such tools is because lte standards are evolving very fast and hence it would substantial effort to maintain it inline with the changes for complicated layers. Lte protocol stack in both user equipment and evolved nodeb. This page covers lte advanced architecture and lte advanced protocol stack. Openlte is an open source implementation of the 3gpp lte specifications. Wisdom jobs let you make decisions that benefit your longlife career. An overview of telecom wireless protocol stack layers nutaq.
In the lte protocol architecture for user plane top and control plane bottom, layer1 and layer2 airinterface protocols terminate in the wireless device and in the enb. Lte control plane layer covers upper layers,nas,rrc,phy and rf. Now lets take a close look at all the layers which are available in eutran protocol stack seen in previous chapter. The controlplane protocol stack of the x2 interface is shown in figure 3. Pdf development of lte ue protocol stack at non access. Lte protocol stack layers free download as word doc. The protocol stack functions consist of the medium access control mac, radio link control rlc, packet data convergence protocol pdcp, and radio resource control rrc. Lte radio layer 2, rrc and radio access network architecture. By selecting lte job as your career, you can surpass your limitations. Jan 08, 2012 interfaces and their protocol stacks after familiarising with main network elements, time has come to better know interfaces between those elements. Pdf this paper presents a case study of the integration of the long term evolution lte physical layer into the radio protocol subsystem of a. The physical layer is the protocols interface to the real world.
Gls lte protocol analyzer within packetscan all ip protocol analyzer is capable of capturing, decoding and performing various test measurements across various interfaces i. This model includes core network interfaces, protocols and entities. Pdf a case study on protocol stack integration for 3gpp. The layer2 protocols include the mac protocol, the rlc protocol, and the pdcp. A promising approach to enabling ubiquitous mobile vr is the edgebased scheme over 4g lte networks 47, 56, 58. In this blog post, i describe gsm and lte in order to illustrate the differences and similarities between protocol stack implementations. Below is a more elaborated diagram of protocol stack. Just take a brief look at the various figures diagrams shown in this page would be enough. Thanks to that lte enb stack as a whole or in chosen parts can be easily tailored to. Lte ue stack is implemented in c using the latest industry standards for improved safety and performance. Pdf the present wireless technology is 4th generation 4g or long term evolution lte and lte. Lte advanced architecture lte advanced protocol stack.
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