Volga voice over lte via generic access access gateway vanc to bridge 2g3g with lte to lte, vanc is an external ip node to gsm umts, vanc is an bsc rnc ue registration. Smartphones require both good quality voice and high speed broadband data. Hence to support voice over lte there are two options. Volte, circuit switched fall back, csfb, voice over lte via generic. When lte was launched, it was seen as a packet data based system for data only. This keeps information about the users phone number, home network identity and security keys etc. Voice over ip over lte volte impacts on lte access 1.
Performance characterization and call reliability diagnosis. The 4g technology, known as long term evolution lte, has been dominating the telecommunication market the last years offering a high data rate up to 100mbps that will perfectly satisfy the users multimedia applications needs in term of bandwidth. Ims ip network pstn or lte ip network calling party called party originating network terminating network access agnostic services independent open architecture multidevice. When 3gpp started designing the lte system, prime focus was to create a system which can achieve high data throughput with low latency and at the same time has the. Solutions, architectures, and protocols conference paper pdf available july 20 with 331 reads how we measure reads. Voice over longterm evolution volte is a standard highspeed wireless communication for mobile phones and data terminals, including internet of things iot devices and wearables. Ue register with mme mme retrieve subscriber information from hlrhss establish security tunnel between ue and vanc over lte. We then describe how voice and data services are provided. Voice over lte performance evaluation springerlink. Summary introduction to wireless lte 4g architecture and key. Volte voice over lte as specified in recommendation ir. The goal of volte is to emulate the services of the. As a part of voice over lte volte, this paper evaluates the performance of ue.
Choosing a national rollout on the nations largest 4g lte network, verizon can deliver a seamless customer experience for highquality calling and other features. This includes various network entities, how they interact selection from voice over lte volte book. But it faces many challenges for traditional voice and sms communication. Roaming architecture for voice over ims with local breakout ravel. Lte and the mobile internet a highlevel multigenerational architectural diagram connecting radio. Jasson casey and srivatsan rajagopalan and muxi yan and graham booker and alexander sprintson and walt magnussen, journal20 22nd international conference on computer. This chapter provides a short introduction to the voice over longterm evolution volte.
It resides out of the lte network and connected to pdn gateway through sgi interface. Much of the lte standard addresses the upgrading of 3g umts to what will eventually be 4g mobile communications technology. We introduce the 4g lte architecture and its legacy 3g network. Figure 1 illustrates the lte architecture, as well as its legacy 3g network, i. Volte service description and implementation guidelines.
Oracle communications policy management in volte white. Voice calls over lte are recognised as the industryagreed progression of voice services across mobile networks, deploying lte radio access technology. Raj jain download abstract rapid increase in data traffic over cellular network is necessitating deployment of long term evolution lte in the cellular operators networks. The first is using voip voice over ip with the help of imsip multimedia system and the the second one is using legacy 2g3g circuit switched fall backcsfb with the concept called srvcc. Status and migration trends lav gupta, lavgupta at wustl. Although there are many over the top applications for carrying voice over an lte signal, volte is the method that is provided by operators. In the context of voice over lte services, effective network policy management becomes even more important, and in fact, is an absolutely critical component in the network architecture. Volte, voice over lte is an imsbased specification. Volte complete ims sip architecture and call flow volte. According to 3g patent platform 3gpp release 8, lte was introduced providing higher access rates and. The existing 2g3g mobile systems use circuit switching to carry voice traffic. Evolution system architecture evolution ltesae towards.
Lte or pstn what is volte lte ims enables a packetbased network to provide multiple services on single controlservice layers via different access network. The long term evolution standard lte is a wireless communications, highspeed data standard for mobile phones and data terminals. Lte is all ip based network and mainly designed for internetdata applications. At the same time, using new, wideband codecs can provide higher voice quality and enhance the user. A capable pcrf offers csps the opportunity to save costs and deploy additional revenuegenerating services that capitalize on the new qos control capabilities of the lte network.
This tutorial emphasizes the impacts of ims over the eps access network. The voice service over lte is becoming increasingly important when the smartphone penetration is increasing rapidly. The highlevel network architecture of lte is comprised of following three main components. Voice over lte, volte is the method of sending voice over an lte bearer. Ims ip multimedia subsystem is a standalone system. Lte provides ip based access with a very high bitrate.
The lte network called eps evolved packet system is an endtoend e2e all ip network. The idea of ims is old, but after its deployment with lte users and operators can harness the true power of ims. Utilising ims technology, it is a digital packet voice service that is delivered over ip via an lte access network. Now, with lte long term evolution taking shape, the ims platform has been given a new role and a niche that will carry it a considerable distance into the future. Overview lte radio evolved packet core control summary volte system architecture voice over lte wiley online library skip to article content. Lte qos architecture to enable such use cases such as non ims voice services, gaming, universal fixed and mobile policy control, and wifi offload. This document presents the lte network architecture as the first technical document of lte area. It is based on the ip multimedia subsystem ims network, with specific profiles for control and media planes of voice service on the lte wireless broadband. To ensure high service quality to end users, volte relies on specialized support in both end devices and network architecture 38, 44, as well as dedicated radio resources during the voice call, to achieve. Get the best seminar report on volte technology with volte ppt and tutorials, diffrence between volte and voip, architecture diagram for engineering and projects. Adopting this approach, it enables the system to be integrated with the suite of applications that will become available on lte. This paper first presents a crash course in volte, and the n explores.
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. The goal of this thesis was to analyse the performance of the voice communications over lte, which are made over internet, comparing the performance achieved, with the wellknown performance of the mobile communications over circuit switching, and the study of the impact of the voice packets on the lte network in the presence of data packets. Mar 05, 2018 volte ims architecture in simplified way. Ims 3g architecture, which could terminate bearer channels from a circuit. Volte ims architecture ims core cscf, tas, mrf, bgw. Before lte, mobile networks used cs domain for voice and sms communication. This book provides the exhaustive view to industryapproved technologies and standards behind the voice over lte volte. Voice over lte volte harri holma by kayleeibarra issuu. Oct 06, 20 voice over lte volte, harri holma download here. Volte sip handset sip support, uac, uas, user agent, sipua, underlying lte network dedicated bearer, qci, default bearer, ims core network sip servers, pcscf, icscf, scscf, tas, bgw, mrf, atcf, atgw, mgcf, pstn breakin or breakout calls. Lte is great for packet data connectivity, such as the internet.
This solution to carry voice over ip in lte networks is commonly known. Challenges and opportunities 2 introduction to voice over lte for mobile communications service providers csps, voice over long term evolution volte has emerged as the preferred solution for enabling real time voice traffic in the emerging world of allip networks. A usim stores userspecific data very similar to 3g sim card. Still voice over cs bearer on the radio access, data bearer not suitable latency, overhead option to transport voice over ip in the core see ts 23. Voice over lte wiley online books wiley online library. Describes the technological solutions and standards which will enable the migration of voice and sms services over to lteepc networksmain. While lte provides efficient data traffic handling and high data rates, it lacks native circuit. 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. However, presently for any mobile system to be commercially viable, the ability to carry voice traffic is essential. Voice over lte, or volte is a gsma profile of the standards definition for the delivery of services currently provided via circuit switch networks mainly voice and sms over the packet switched only network of lte, leveraging the core network ip multimedia subsystem ims. Voice over lte, or volte is a gsma profile of the standards definition for the delivery of.
Volte system architecture voice over lte wiley online library. Voice support in lte requires the right mechanisms and architecture in radio. How voice calls affect data in operational lte networks. Existing 3g mobile networks rely on a traditional circuitswitched architecture for delivery of voice services. However, lte architecture does not support native circuit switching services and relies on the ip multimedia subsystem ims for supporting voice and short.
Outining a profile for supporting voice, video and sms, ir. Pdf this chapter provides a short introduction to the voice over. Volte or voice over lte is slated to roll out on verizons nationwide network later this year. When mobile networks deploy lte radio access technology, conformity to. As a part of voice over lte volte, this paper evaluates the performance of ue under csfb with its effect on peak data rates and reliability on ims for deploying voice and sms services. Raj jain download abstract rapid increase in data traffic over cellular network is necessitating deployment of long term evolution lte in the cellular. Ts23402 architecture enhancements for non3gpp nonroaming access. Lte 4g network uses volte voice over lte as the technical solution to carry out voice calls over ip. Volte system architecture voice over lte wiley online. Designed to be a fully packet switched network, lte lack in offering the voice cs service. Performance comparison of voice communications between volte. Jun 18, 2018 lte x2 handoverx2ho call flow procedure lte enodeb handover over the x2 interface enghindi duration.
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