The gprs core network is the central part of the general packet radio service gprs which allows 2g, 3g and wcdma mobile networks to transmit ip packets to external networks such as the internet. Nokia siemens networks lte 1800 mhz introducing lte with maximum reuse of gsm assets. When a new call arrives in the system to get admission, it checks whether the call is admitted or not based on some parameters like signal to interference ratio sir, transmission power of the node b and the air interface load. Pdf wcdma system standardization, interfaces and power. The state of wcdma network is changing fast and it is important to have an immediate feedback loop from the operational network, such as performance measurements wcdma radio network planning is closely related to the optimisation of radio network 31. The comparison reveals that eutran consists of one type of nodes, namely evolved node b enodeb, and the variety of interconnections is. Umts specifies a complete network system, which includes the radio access network umts terrestrial radio access network, or utran, the core network mobile application part, or map. The open architecture of the wcdma core network wideband code division multiple access.
In parallel with the deployment of lte radio access technology to cope with dramatic increases in traffic, ntt docomo is introducing epc as a core network for accommodating lte and other radio access systems. To save battery life, im planning to switch from the automatic to the manual mode, and i want to know what happens if i stick to gsm or wcdma. Uplink, downlink in separate frequency bands tdd time division duplex. Hence, the technologies can share the same core network. Wcdma including the ran radio access network and the cn core network.
Furthermore, this white paper addresses the core network impacts of traffic migration from gsm to lte and how to integrate lte management into. If you continue browsing the site, you agree to the use of cookies on this website. The architecture of the nfv over the mobile core network can scale dynamically, according to its specific resource requirements e. Third edition edited by harri holma and antti toskala both of nokia, finland. Core network is composed of circuit switched and packet switched functional modules. What is the technical difference between selecting gsm and selecting wcdma in network mode settings menu. A umts network consist of three interacting domains. Difference between wcdma and lte compare the difference.
Wcdmahspa basics for umts kari aho project and business development manager kari. Uplink, downlink in the same frequency band and separated in time. Radio access network gsmgprs core network bss pstn, isdn bts bsc msc vlr gmsc ms hlr gsmgprs networkgsmgprs networkarchitecture architecture. Which refers to universal terrestrial radio access network. Wcdma is an interference limited multiple access technique. The dissertation focuses on enhancement of qos for wcdma cn. Cellular 1970s name allipbased ipbased gprs, mobileip circuitbased digital gsm,is95 circuitbased analog pstn core network 1st 2nd 3rd 4th. Transfer sent by the ue to the core network and the security mode command initiated by the. Wcdma technology has emerged as the most widely adopted third generation air interface. Fundamentals of cellular network planning and optimisation covers endtoend network planning and optimisation aspects from second generation gsm to third generation wcdma networks including gprs and edge networks. Aug 14, 2009 3g nontechnical presentation wcdma core network slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Core network cn, umts terrestrial radio access network utran and user equipment ue. Core network evolution while the media focus seems to be primarily on the airinterface evolution of.
Wideband code division multiple access wcdma is one of three 3g standards, and enhancement of qos for wcdma core network cn becomes more and more important for users and carriers. The rnc, node b and ms together are called the serving radio network system srns. Mobile core network an overview sciencedirect topics. Wcdma for umts radio access for third generation mobile communications. Wcdma system standardization, interfaces and power control. As a result, sae calls for a transition to a flat, allip core network, called the evolved packet core epc, that features. Iu is the interconnection point between an rnc and the 3g core. Request pdf an introduction to 3g core network architecture. You must know wcdma which stands for wide band code division multiple access. Oct 21, 2012 wideband code division multiple access wcdma is a thirdgeneration 3g standard that employs the directsequence code division multiple access dscdma channel access method and the frequencydivision duplexing fdd method to provide highspeed and highcapacity service. The more general term evolved radio access network eran, can also be used as part of signaling protocols, as the term access stratum as can be used.
Owg000001 wcdma core network overview is authorstream presentation. Actually, the access network for the 3g network is the utran. Course summary this course mainly introduces major flows in the wcdma core network as well as some service flows. Umts evolution visitor location register mobile switching center home location register gateway msc 3g sgsn 3g ggsn gsm gprs umts radio network controller radio network controller voice data telcom 2720 29 wcdma wideband code division multiple access wcdma the air radio interface standard for umts. Latency in hspa data networks siddharth mohan, rohit kapoor, bibhu mohanty. Gsm won the world, being more flexible and cheap open standard 3g added internet. Gsm wcdma hspa lte edge lte is the next step on the migration path to wireless broadband. Mathematical modelling of call admission control in wcdma.
Furthermore, this white paper addresses the core network impacts of traffic migration from gsm to lte and how to integrate lte management into operators network management systems in a cost efficient way. Realization of differentiated quality of service for. Nokia siemens networks lte 1800 mhz introducing lte with. This ip address is always allocated to the mobile terminal so that servers on the serviceprovision side can provide ip services the same as in a fixed communications network without having to. The gprs system is an integrated part of the gsm network switching subsystem the network provides mobility management, session management and transport for internet protocol packet services in gsm. Wcdma wide band code division multiple access umts before we talk about 4g or gsm. The highlevel network architecture of lte is comprised of following three main components.
Umts uses wideband code division multiple access w cdma radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators. Utran umts terrestrial radio access network handles all radio related functionality wcdma is radio interface standard here. As a result, sae calls for a transition to a flat, allip core. This keeps information about the users phone number, home network identity and security keys etc. Intersystem handover when more wcdma carriers are present.
Wcdma open loop power control in wcdma attempt to make a rough estimation of path loss by measuring downlink beacon signal problem far too inaccurate fast fading is essentially uncorrelated between uplink and downlink due to large frequency separation of uplink and downlink band of wcdma fdd mode. Zonghua zhang, ahmed meddahi, in security in network functions virtualization, 2017. Also, the ps core nodes of wcdma that consists of ggsn and sgsn are replaced by the same saegw and mme respectively. A logical view of the network is shown in figure 1. Fma2 is a singlecarrier wideband cdma solution using a 4. Network systems technologies, llc 3 wcdma radio access network wcdma network is deployed in umts a user equipment ue or terminal communicates with several nodebs. The ran is used to process all the radiorelated functions, while the cn is used to process all voice calls and data connections within the umts system, and implements the function of external network switching and routing. Tinnirello sgsn ggsn ps core callsession control using sip session initiating protocol interworking with the pstn may.
As shown in the figure there are three main components in umts network architecture, user equipments is composed of mobile equipment me and usim. Jul, 2011 lte provides much simpler and flat network architecture than that of the wcdma. Fundamentals of cellular network planning and optimisation. The main function of the core network is to provide switching, routing and transit for user traffic.
Wcdma open loop power control in wcdma attempt to make a rough estimation of path loss by measuring downlink beacon signal problem far too inaccurate fast fading is essentially uncorrelated between uplink and downlink due to large frequency separation. Mobile network technologies gsmgprsumtslte youtube. The wcdma design handbook provides a detailed overview of the architecture and operation of the wideband codedivision multiple access wcdma interface. Owg000001 wcdma core network overview is authorstream.
The open architecture of the wcdma core network wideband code division multiple access wcdma is a 3rd generation mobile. Network systems technologies, llc 8 wcdma protocol layers packet data convergence protocol pdcp performs ip packet header compression on user data from core network. Umts uses wideband code division multiple access wcdma radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators. Ieee communications magazine this is a good handbook with precise technical information, although some basics of wcdma are also gathered in the first part. Furthermore, both gsm bss and wcdma ran systems are based on the principles of a cellular radio system. Network systems technologies, llc 2 wcdma ran architecture.
It is a third generation network developed by ntt docomo and from 2g network cdma. Logically, the cn is divided into the cs circuit switched domain and the ps packet switched. The introduction of major flows starts first with mobility management flow introductions, followed by the introduction to service execution flows. Wideband code division and multiplication access souhaibe barkat communications theory final project. Lte, simplifying the migration to 4g networks page 3 gsm wcdma hspa lte. The gsm base station controller bsc corresponds to the wcdma radio network controller rnc. Wideband cdma wcdma means that bandwidth is not dependent of the information signal.
The radio environment of a wireless network system is a multipath environment. The core network of umts is inherited from gsm gprs network. Although 3g umts uses a totally different radio access standard, the core network is the same as that used for gprs and edge to carry separate circuit switched voice and packet data. Sep 22, 2016 umts core network and its evolution 1.
Providing deeply detailed information, it seems to be a good technical handbook. Between the radio networks controller rnc and core network, there is iu utran interface. The nss is the core component of the gsm architecture which is responsible for. What is wideband code division multiple access wcdma. Page4 release evolution of wcdma r4 r5 r99 inherit all the services and functions of 2g gsm and gprs cn is composed of cs domain and ps domain adopt wcdma utran iu interface between ran and cn is based on atm inherit all the services and functions of r99 cs domain change. The core network is then the overall entity that interfaces to external networks including the public phone network and other cellular telecommunications networks. Ue, universal terrestrial radio access network utran, and core net.
Ip multimedia subsystem ims roaming in mobile networks. Pdf wcdma system standardization, interfaces and power control. Wideband code division multiple access wcdma is a thirdgeneration 3g standard that employs the directsequence code division multiple access dscdma channel access method and the frequencydivision duplexing fdd method to provide highspeed and highcapacity service. Logically, iur represents a pointtopoint link between rncs, however the physical realisation may not be a pointtopoint link. Core network also contains the databases and network management functions. Cs core network part of wcdma, which includes mgw and msc server is completely replaced by ps core in lte using the saegw and mme. This paper explain the most common issue and there analysis. Pdf 3gumts call flow originating call user equipment. Evolutionary analysis of gsm, umts and lte mobile network. Mobile networking concepts and protocols cnt 5517 dr.
Wcdma based system all users share the same frequency time domain. The core network technologies, design, and dimensioning. Utran is connected the core network cn via iu interface. Core network development department ntt docomo technical journal. Lte provides much simpler and flat network architecture than that of the wcdma. Multilevel simulation of wcdma systems for thirdgeneration wireless applications dr. The wcdma design handbook should be recommended especially to people interested in protocols and signaling. Furthermore, both gsm bss and wcdma ran systems are based on the principles of a cellular radio. Cs core pstn internet other ims hss the ims can establish multimedia sessions using ip transport via ps core between ue and internet or another ims ims ip multimedia mgw 3gpp rel.
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