Third, some drawbacks in lte security framework are discussed in section 4. The mobile phone and subscriber identity module, the umts radio access network and, supporting voice with the circuit switched core network. Reference architectures 2017 deploying mobile networks using. Network architecture for lte and wifi interworking netmanias. Enhanced packet data gateway epdg, untrusted non3gpp accesses, wifi hotspot, ipsec. Physicalcommunication32010217244 219 table 1 lte, lte advanced,andimtadvancedperformancetargetsfordownlinkdlanduplinkul. Increased bandwidth endtoend ip simplified architecture.
It also provides a look at the evolution to a dataonly lte network and includes a discussion of. Lte enodeb s1 startup, mibsib broadcast and rrc connection learn about enodeb startup. Mavenir epdg key benefits software solution for evolved. However, it is always up to the home operator to decide what is to be considered. Physicalcommunication32010217244 219 table 1 lte,lteadvanced,andimtadvancedperformancetargetsfordownlinkdlanduplinkul. Second, lte security architecture is shown as well. The following diagram shows the call flow for the eapmschapv2. Non3gpp access using third party twag or epdg gateways respectively. This ip allocation happens during the ike process when ue first go through epdg.
Lwa lte wlan aggregation user plane architecture in the downlink, the enb may schedule pdcp pdus of the same bearer to be delivered to the ue either via. This is followed by lectures that cover lte frequency bands, ofdm, ofdma, scfdma and lte signaling. This article looks at the evolved packet core epc, the core network of the lte system, giving an overview of the architecture of the core network, describing some of its key elements. The main goals of lte is to increase the capacity and data rates of wireless data networks, improve spectrum efficiency, improve coverage, reduced latency and packetoptimized system that. Scribd is the worlds largest social reading and publishing site. Nonroaming architecture within eps using s5, s2a, s2b. The gateway is called an evolved packet data gateway epdg and its function is to terminate millions of ipsec tunnels. Evolutionary analysis of gsm, umts and lte mobile network. Network architecture 9 network protocol 3 network slicing 1. Sep 24, 2015 we use your linkedin profile and activity data to personalize ads and to show you more relevant ads. In gsm, the architecture relies on circuitswitching cs. The main component of the sae architecture is the evolved. Evolved packet core epc for communications service providers. 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.
Aug 16, 20 this document covers lte overview, wifi overview, comparison lte vs. The following architecture diagram shows epc, ims and the interface between them. Volte and vowifi wifi calling, deployment scenarios, network architecture and finally network elements and functions. Lte architecture enhancements for non3gpp accesses. Nomor provides sae system architecture evolution test bed within the sea project. High level architecture for 3gpp lte details of all lte interfaces are given in appendix a 5. The smec lte epdg evolved packet data gateway is designed to provide seamless integration of wifi as a subset of lte ran with purposebuilt hardware platform andor scalable cots server based platform which provides mobile operators with the capability to securely and cost effectively integrate untrusted wifi networks to the mobile packet core, including ims core networks, using 3gpp epdg. Wlan traffic offload in lte 4 2 architecture of wlan networks wireless local area network wlan also commonly known as wifi is a wireless data communication system. This document covers lte overview, wifi overview, comparison lte vs.
According to different service requirements, fiberoptic cable availability and network resource allocations, ran real time and nonreal time resources can be deployed on the site or on the access cloud side. System architecture evolution wikipedia, a enciclopedia livre. As stated above, the epc is designed to support any onaccess technology. Architecture and key features of lte advanced networks article pdf available january 2012 with 11,841 reads how we measure reads. Gsm the introduction of mobile communications can be traced back to the early 1980s when. Lte network architecture is a generally simplified access network which marks a total departure from previous standards, characterized by the absence of a circuit switched. The evolved nodeb enodeb is the base station for lte radio.
User equipment ue ue is a mobile terminal authorized to be used in an lte network. The lte epc architecture epdg in the interworking architecture briefly. Network architecture for lte and wifi interworking slideshare. The epc is the latest evolution of the 3gpp core network architecture. The epdg acts as the gateway between the public internet and epc. Discover 5g core network functions compared to 4g lte. The long term evolution standard lte is a wireless communications, highspeed data standard for mobile phones and data terminals. Sae is the evolution of the gprs core network, with some differences.
Wifi to lte handoff with dedicated bearer ue initiated 89. Following is the architecture showing the combination of following figures in 23. Ue may be a smartphone, tablet or other communication devices. System architecture evolution sae is the core network architecture of 3gpps lte wireless communication standard sae is the evolution of the gprs core network, with some differences. Sep 10, 2018 the non3gpp access interworking function n3iwf is similar to the epdg in the 4g epc, which is a secure gateway for the ue access nontrusted networks, such as wifi and the public internet. Network architecture for lte and wifi interworking 1.
Technical specification ts initial planned release. System architecture sa1 services sa2 architecture stage2 sa3. Lte is allip advanced core architecture proposed in release 8 of 3gpp to only process packets. Micro networks are smallcell networks which are overlay networks that provide 3g4g. Lte epc architecture free download as powerpoint presentation. 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. Ltewlan aggregation deployment considerations and benefits. It should be noted that the untrusted epdg case typically uses ipsec. System architecture evolution sae is the core network architecture of 3gpp s lte wireless communication standard.
The first thing you need to understand is overall network architecture related to wifi offload. Evolved packet data gateway epdg supports pmipv6 rfc 5123 other options such as client mip, dualstack mip and others are supported in ts 23. Trusted access is often assumed to be an operatorbuilt wifi access with encryption in the wifi radio access network ran and a secure authentication method. Note that ive kept it as simple as theoretically possible. The epc architecture defines an architecture whereby the ue can communicate via non3gpp networks.
How to deploy trusted untrusted 3gpp wifi access aptilo. The non3gpp access interworking function n3iwf is similar to the epdg in the 4g epc, which is a secure gateway for the ue access non. Section iii describes the lte interworking requirements and explains and analyses the lte interworking with different wireless networks. The architecture of lte network and working principle lte is a standard for wireless data communications technology and an evolution of the gsmumts standard. In addition, the cdm shortens service activation cycles and accelerate vowifi commercial use. A simplified conceptual network diagram showing the unified integrated.
For example, a business traveler accessing the internet from a public wireless lan at an airport is a user. The use of ipsec allows the operator to route customer traffic across untrusted wifi and internet connections. Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. Comprehensive lte core network airspans acore system is the long term evolution lte evolved packet core epc enabling intelligent, reliable, rich services and security for the fourth generation operators. Nfv reference architecture for deployment of mobile networks. Its basis stands in the gsmedge and umtshspa network technologies, with changes in terms of an increased capacity and higher speed by simplifying the core network and using a different radio interface. Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low.
A technical overview in this section, we describe the functions of the different protocol. In some cases, however, the user might not be human. The lectures also cover channel mapping and ue categories. Introduction the term long term evolution lte stands for the process. For untrusted non3gpp ip access, note that the network architecture. About nmc consulting group nmc consulting group was founded. The huawei vowifi network reuses the volte architecture. The evolved umts terrestrial radio access network e. Evolved packet core the epc is designed to provide an allip, flat architecture which provides high throughput and reduced latency. Issues toward networks architecture security for lte and lte. Section 4 gives an overview of the lte architecture, while section 5 gives an overview of the comparison between all architectures 2. Finally, some open issues will be talked, and hopefully this will be a guideline for the new learners.
The primary goals of this architecture was to achieve higher data rates, low latency, with support for multiple radio access techniques. Carriers can deploy the epdg or upgrade the live epc network, deploy the 3gpp aaa or upgrade the live sdm to deploy vowifi. General packet radio service gprs enhancements for evolved universal terrestrial radio access network eutran access. The s8 home routing approach means that the voice, video calling, and messaging services are provided by the ims in the home network while the visited network provides the connectivity, qos, and regulatory services. The highlevel network architecture of lte is comprised of following three main components. The following links provide a good introduction to epcbased onaccess.
Performance analysis and deployment of volte mechanisms. However, we describe only the evolved packet data gateway epdg, which is newly introduced in the lte architecture to support wifi calling. Lte have a significant effect on the operation of mobile devices. Ueepdginitiated detach procedure and uerequested pdn disconnection. Performance analysis and deployment of volte mechanisms over. The mobile equipment comprised of the following important modules.
Generation 3g, 4th generation long term evolution 4g lte networks that we connect to from our cell phones. Ue ip allocation and various server ip can be assinged to ue over epdg. Trusted non3gpp wifi access was first introduced with the lte standard in 3gpp release 8 2008. You would see various network architecture depending various use model. The evolved packet core communicates with packet data networks in the outside world such as the. It consists of several elements as defined in 3gpp ts 23. The paper starts with a discussion about interworking between lte and 5g then explores. Mavenir epdg for secure and seamless connectivity the mavenir evolved packet data gateway epdg is a standards based commercially proven network component that provides secure, cost efficient integration of wifi access into the lte operators evolved packet core epc while maintaining seamless mobility. Volte roaming is deployed with the s8 home routing architecture which expands on and reuses the lte data roaming architecture. This paper provides an overview of ims, its architecture and applications from the perspective of the lte user equipment ue.
Following the 3gpp reference architecture defined within the 3gpps ts 23. Part of my indevelopment course on the the evolved packet core. The lte network architecture incorporates new network elements. This paper explores the 3gpp 5g network architecture from release 15 phase 1 and how this will evolve with the introduction of next generation core ngc network. Italsoshowsthenetworkinterfacesusedbytheciscomme,sgw,andpgwinthe eutranepcnetwork. Additionally, the figure above omits description of interfaces with network elements that are not connected directly to the ue. It employs a nonhierarchical distributed structure.
The following diagram shows the call flow for the eapmschapv2 based authentication. This goes over the eps in general, describing each component. We use your linkedin profile and activity data to personalize ads and to show you more relevant ads. Lte network architecture is a generally simplified access network which marks a total departure from previous standards, characterized by the absence of a circuitswitched domain. How wireless works users a user can be anything that directly utilizes the wireless network. Wifi, tunneling technology for mobile network and lte and wifi interworking. Untrusted non3gpp access requires epdg in the data path figure 1. Network architecture for lte and wifi interworking.
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