The routers provide persistent, reliable lte connectivity transparent handoffs between. Jan 31, 2011 it is always good to have some technology resources. Whilst umts is based upon wcdma technology, the 3gpp developed new specifications. Implementation of the 3gpp ltewlan interworking protocols. 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 4g network architecture lte core network mobile. Interfaces allow the mme, sgw and pgw to cooperate with other network elements e. The course then describes the key interfaces between these functions, with particular emphasis on the lte air interface, as well as the underlying protocols carried over these interfaces. Ralf kreher works as a solution architect for tektronix mobile protocol test mpt business with a focus on umts performance measurement and key performance indicator kpi implementation. Reference point for the control plane protocol between eutran and mme. In this tutorial you can learn the following topics.
Interfaces allow the lte mme, sgw and pgw to cooperate with other network elements e. Lte interfaces and protocols telecommunications blog. Previously hewas head of the mpt customer training department for almost four years and was responsible for a worldclass seminar portfolio for mobile technologies and measurement products. To illustrate the concepts being discussed, several sample. Each one of them is built in a standard way described by. Each interface described here is taken from the 23.
Physical data channels between different levels of the physical layer. Cisco 809 industrial integrated services routers data sheet. Volte roaming is defined in the lte roaming guidelines gsma prd ir. Dec 01, 2018 lte refers to long term evolution, and the architecture of the lte network is as following, the enodeb is the 4g site that the ue connects to. Identify the key interfaces between ims nodes and define the protocols carried over each interface illustrate the paths control signaling and voice media take through the lte and ims networks prerequisites exploring lte. Long term evolution lte is based on an evolved architecture that makes it a candidate of choice for next generation wireless mobile networks. It is always good to have some technology resources. Know protocol stack of lteuu radio interface know the main physicalrrcnas layer procedure know protocol conformance testing of 4glte terminal. 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. The epc is a multiaccess core network based on the internet protocol ip. Ltes eutran is an entirely new air interface system, which provides higher data rates and lower latency and is optimized for packet data.
The picture shows main network elements, interfaces and the protocols used in lte. Lte protocols course description if you are involved in the troubleshooting of lte networks, you will appreciate that having a good understanding of the protocols is critical. This document defines the volte service description and implementation guidelines in. Lte architecture and interfaces linkedin slideshare. Make it easier to find for others who could need those information, allow them find these articles on the spot. The support for multiple vehicle buses allows for ease of installation and compatibility with a broad set of vehicles. The cisco 809 industrial integrated services routers support the latest thirdgeneration partnership project 3gpp release 9 category 3 and category 4 lte standards. This course therefore sets out to provide a detailed explanation of the lte protocols that can.
Interfaces and their protocol stacks after familiarising with main network elements, time has come to better know interfaces between those elements. The gnx6 lte supports canobdiij1708j1939 interfaces to enable vehicle bus communications. Signaling messages are described in interface protocols and specifications. Pdf mobile interface 3gpp interfaces description general map. The radio protocol architecture for lte can be separated into control plane architecture and user plane architecture as shown below. An interface refers to the connecting point between two adjacent network entities. Pdf mobile interface 3gpp interfaces description general. The protocols used in the air interface, from the viewpoint of the mobile. The epc is a multiaccess core network based on the internet protocol ip that enables operators to deploy and operate. Next, the interfaces between the eps entities and the protocol stack across the interfaces are described. Lte volte ims protocols interfaces pstn voice network ims network lte 4g network lte user plane ex.
Aug 11, 2009 utran interfaces are the most important point to start learning about the whole system. The protocols over lte uu and s1 interfaces are divided into two groups. This paper provides an overview of both the core and access networks of lte. A protocol defines rules to be complied with for exchanging information on the connecting point. Utran interfaces are the most important point to start learning about the whole system. Rrc is the protocol that is used for communication between ue. Long term evolution lte is the next step forward in cellular 3g services. Diameter interfaces in lte, diameter interfaces in epc, s6a interface, s6d interface, s interface, s interface, s6as6d, ss s7a css, mobility management entity mme,home subscriber server hss,serving gateway sgw,pdn gateway pgw,policy and charging control entityfunction pcrf 3gpp 23401, 3gpp 29272 s6as6d interface diameter idr insertsubscriberdatarequest between. The physical layer itself maintains the continuous connection model, especially on the downlink, where there is continuous transmission. However, the two protocols most suitable for mass iot market are mqtt over data communication protocols for the. Lte core functions and service procedures core network functions. Lte interfaces with protocols lte architecture and interfaces, lte protocol architecture, lte interfaces diagram, lte architecture ppt, lte architecture 3gpp, lte architecture pdf, s1 interface, s11 interface.
Reference point between eutran and serving gw for the per bearer user plane tunnelling and inter enodeb path switching during handover. Know protocol stack of lte uu radio interface know the main physicalrrcnas layer procedure know protocol conformance testing of 4g lte terminal. This document presents the lte network architecture as the first technical document of lte area. Interfaces and their protocol stacks lte and beyond. Lte provides a packet switched model at the sap, but retains a circuit switched model at the phy. Introduction to evolved packet core epc and evolved packet system eps 2. Lte or long term evolution is the brand name given to the efforts of 3gpp 4th generation technology development efforts mostly in europe and umb ultramobile broadband is the brand name for similar efforts by 3gpp2 in north america. 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.
Multiple connectivity protocols and spectrum would be managed from a common core management system handling both. Lte refers to long term evolution, and the architecture of the lte network is as following, the enodeb is the 4g site that the ue connects to. This completely revised and updated edition of the highly successful umts signaling provides a deep insight into all aspects of umts signalling. Umts interfaces protocols on different interfaces standard numbers and links to the different standards. The figures shown below provide mapping of protocols to corresponding specifications. The lte network architecture explained in this document applies to a lte only network provided by a single operator and thus has covered the most basic components of the eps system. Relevant for testing harq retransmission protocols, power control. It delivers powerenhanced performance and m2moptimized speeds of 10mbits downlink and 5mbits uplink, and features lowpower, lowcost lte connectivity. Besides these methodological contributions, we make the following insightful observations about lte network usage. Within an lte network, lte interfaces connect the various components to or within the core. Connections are constructed of connection elements radio interface connection element a interface connection element. Frequent interactions are used to ensure student comprehension of the essential technologies used in all lte networks. Epc components serving gateway sgw, pdn gateway pgw mobility management entity mme, policy and charging control function pcrf 4.
The webbased protocols are primarily used for communication on browserbased clients, which typically run on relatively highcapability devices, such as smartphones that use relatively highbandwidth communications channels e. These interfaces are between sgw and pdngw, provides support for functions for packet data services towards end users during roaming and nonroaming cases i. Functional details of the associated protocols and interfaces are also presented. The routers provide persistent, reliable lte connectivity transparent handoffs between lte and 3g networks. The protocols over lteuu and s1 interfaces are divided into two groups.
Sep 16, 2018 lte volte ims protocols interfaces pstn voice network ims network lte 4g network lte user plane ex. This is the interface between the mme and sgw in an lte network. Figure 1, presents a pictorial depiction of the discussion so far. Executive summary this reference guide presents an overview of the procedures and protocols used in imsbased lte systems, from the perspective of the. Lte interfaces with protocols 6g5g4g protocol technology. Geran and utran networks are shown for completeness. Course contents historical vision lte capabilities system architecture 3. 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. Lte interfaces with protocols lte architecture and interfaces, lte protocol architecture, lte interfaces diagram, lte architecture ppt, lte architecture 3gpp, lte architecture pdf.
The main interfaces in lte are uu, s1mme, x2, s1u, s11 and s5. Volte service description and implementation guidelines. Lte volte ims protocols interfaces lte volte ims protocols interfaces. The lte network called eps evolved packet system is an endtoend e2e all ip network. To present network architecture, protocols stack, radio access technology, signalling procedures. Implementation of the 3gpp ltewlan interworking protocols in. Gsm association nonconfidential official document v1. The chapter structure has been reworked for improved usability for readers, as well as including many new features and updates. Sh, ro, cx, rx, sv, isc, mw, mg, mi ip layer mac data link layer physical ethernet lteprotocol stack imsprotocol. Protocol signaling procedures in lte radisys white paper 2 network architecture in figure 1, the architecture of the lte network is given with the various interfaces between the network elements. In lte, information is organized as a function of frequency as well as time, using a resource grid. Dec 31, 2010 the picture shows main network elements, interfaces and the protocols used in lte.
Sh, ro, cx, rx, sv, isc, mw, mg, mi ip layer mac data link layer te physical ethernet ol ack ims ol ack udp, tcp. Lte for mobile broadband 2nd edition oct 2008, academic press. Figure 2 shows the user plane protocol stacks for the lte network reference model shown in figure 1. If you continue browsing the site, you agree to the use of cookies on this website. 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. Interfaces are allowing mme, sgw and pgw cooperating with other network elements e. The user equipment ue the internal architecture of the user equipment for lte is identical to the one used by umts and gsm which is actually a mobile equipment me. The best way to learn a new technology is to look the overall architecture first, like the end to end communication interfaces, protocols involved, radio interface technology involved, etc. Access in the downlink and scfdma single carrier frequency division multiple access in the uplink. Pdf this document provide maps about 3gpp network nodes and interfaces. This course therefore sets out to provide a detailed explanation of the lte protocols that can be found within the eutra, eutran and epc. The interfaces between the different parts of the system are denoted uu, s1 and sgi as shown below. Spirent ims roceres n rotocols the lte user equipment perspective 2. Lte uses several different types of logical, transport and physical channel, which are distinguished by the kind of information they carry and by the way in which the information is processed.
After knowing the overall system architecture one can start going into details of system nodes. To be able to move on to other lte technical documents that follow, fundamental understanding of the entities and interfaces of the eps system is required. Interfaces and their protocol stacks lte and beyond tech. Long term evolution protocol overview nxp semiconductors. 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 the mobile. Abstract the evolution of wireless networks is a continuous phenomenon. Finally, this tutorial looks at umts measurement and testing where tutorial participants will find realworld situations with practical suggestions for measurement approaches. Some of these interfaces and protocols that are being used in lte are mentioned in. Executive summary this reference guide presents an overview of the procedures and protocols used in imsbased lte systems, from the perspective of the ue.