Difference between cdma and wcdma difference between. As wcdma mobile penetration increases, it allows wcdma networks to carry a greater share of voice and data traffic. User plane control plane ihspa introduces the first true flat architecture to wcdma. Cn core network is responsible for transport functions such as switching and routing calls and data, tracking users usim me. Cdma is a 2g technology and is a direct competitor to gsm, which is the most widely deployed technology. A high speed 3g mobile wireless technology with capacity to offer higher data rate than cdma. Wcdma is the most commonly used variant of the universal mobile. The wcdma infrastructure is compatible with gsm mobile radio communication.
Short for wideband cdma codedivision multiple access, a 3g technology that increases data transmission rates in gsm systems by using the cdma air interface instead of tdma. What is wideband code division multiple access wcdma. Difference between wcdma and lte compare the difference. Nodebis a base station responsible for physical layer processing. The gsm base station subsystem bss and the wcdma radio access network ran are both connected to the gsm core network for providing a radio connection to the handset. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. This technology is controlled by the united states government. The company offers services, software and infrastructure in information and communications technology for telecommunications operators, traditional telecommunications and internet protocol ip. Engineering services group wcdma network planning and optimization 80w08531 revision b may, 2006. Wideband code division multiple access, along with umtsfdd, utrafdd, or imt2000 cdma direct spread is an air interface standard found in 3g mobile telecommunications networks. Systems beyond imt2000 imtadvanced is set to introduce evolutionary path beyond 3g. April 24, 2001 ece371vv wcdma 2 outline motivation key features of wcdma conclusion zeon pdf driver trial tw.
Pdf wcdma system standardization, interfaces and power. In addition to wcdma, third generation services can also be provided with edge or with multicarrier cdma. Hsdpa and hsupa were introduced in 3gpp release 5 and 3gpp release 6, respectively. The service aspects, architecture, protocols, and implementation strategies are all presented in a clear, concise format.
This, together with a thorough grounding of the wideband code division multiple access w cdma scheme used in umts, the structure of the air interface, the associated radio planning issues and migration strategies. The european community has mandated a harmonized standard, gsm, in the 2g bands, and has adopted wideband cdma wcdma in the 3g. Buyuksahin srinivas bodapati zeon pdf driver trial eric c. Wcdma is a 3g technology that is often used in tandem with gsm to provide both 2g and 3g capabilities within the same area of coverage. Cdma2000 is as much an air interface as a solution of network to provide the services that the clients demand today.
Lte long term evolution is the next major step in mobile radio. The ue can take a variety of forms, although the most common format is still a version of a mobile phone although having many data capabilities. Instead of assigning specific frequencies or time slots to each user, the systems users are distinguished by assigning codes. The proposed 3g wideband cdma systems are complex in nature. The prin ciple architecture of a umts network, generally referred to as public land mobile net. Wcdma is based on cdma and is the technology used in umts. Selection of transport format for each transport channel. The architecture of cdma2000 data system is based on the following components as shown in figure 4. The lte network called eps evolved packet system is an endtoend e2e all ip network. Introduction nokia siemens networks nokia siemens networks and umts forum umts forum, 2009 argues that data traffic in existing wcdmahspa and cdma networks is growing dramatically year by year. The introduction and development of solution like skype is highly significant v. 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.
A mobile station in a form of a handset, pda, or pcmcia card in handheldportable computer supporting simple ip or mobile ip client or both. Umts network architecture basic configuration, release 3 bss bsc rns rnc cn node b node b a iups iur iub uu msc sgsn gs gmsc ggsn hlr gn gr gc c d e auc h eir f gf pstn gi gb iucs vlr b gp. This document presents the lte network architecture as the first technical document of lte area. Wcdma was adopted as a standard by the itu under the name imt2000 direct spread. It supports conventional cellular voice, text and mms services, but can also carry data at high speeds, allowing mobile operators to deliver higher bandwidth. Lowest layer in this interface is physical layer, phy. Umts system architecture umts subscriber identity module usim. Layer 2 consists of medium access control mac radio link control rlc the broadcast multicast control bmc packet data convergence protocol pdcp 3. Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low. Pdf umts networks architecture, mobility and services. Possible problems wcdmagsm coverage and capacity enhancing techniques repeaters tma hspa hs pa protocol architecture and impact on existing utran s rlcmac protocol implementation in hspa transmission requirements on utran due to hs pa introduction long term harmonization plans between edge and wcdmahsp.
Wideband code division multiple access wcdma is the physical layer used for universal terrestrial radio access utra fdd mode. Spreading and scrambling transport channel combining soft handover. The wcdma technology provides the umts system some of the new functionalities on the air interface. This fact, coupled with the desire to operate these systems in concert with a diversity of systems employing other signaling formats seriously complicates the design process. Pdf umts universal mobile telecommunication service is one of 3g third generation of wireless broadband systems. Existing 3gpp gsm and wcdmahspa and 3gpp2 cdma2000 1xrtt, evdo systems are integrated to the evolved system through standardized interfaces.
Wcdma hspa data optimized 5 mhz voice voice voice voice voice voice voice voice voice voice voice voice data after voice users served, remaining resources used for data based on same principles as evdo voice evdo blazed the trail for hspa mobile broadband services apps wwwmultimedia navigation browser introduction of a dataonly, data. Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. The umts utilizes the same wellknown architecture that has been used by all main second generation systems and even by some first generation systems. Within 3gpp, wcdma is called utra universal terrestrial radio access, fdd frequency division duplex and tdd time division duplex, the name wcdma being used to cover both fdd and tdd operation. Wcdma is a wideband directsequence code division multiple access dscdma system. Wideband code division multiple access is a 3rd generation mobile communication system that uses code division multiple access cdma technology over a wide frequency band to provide highspeed multimedia and efficient voice services. Multicarrier cdma is the evolution of is95 for high data rates using three is95 carriers, and is introduced in chapter 14.
Edge is the evolution of gsm for high data rates within the gsm carrier spacing. Most part of the rnc functionalities are moved to the node b. Telefonaktiebolaget lm ericsson, doing business as ericsson, is a swedish multinational networking and telecommunications company headquartered in stockholm. Lte network architecture evolution direct tunnel 3gpp rel 7 internet hspa internet node b sgsn ggsn node b rnc funct. It has an open, distributed architecture the separation of switching and service control functions full use of ss7 as the signaling infrastructure its clearly defined and specified interfaces the nature of its in structure general packet radio service gprs and enhanced data rates for global evolution edge cdma, are 3g. The 3g systems support wide band services like high speed internet access. Wideband code division multiple access wcdma definition. The physical layer has interface to both mac and rrc sublayer. 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. W cdma wideband code division multiple access wcdma wideband code division multiple access is the radio access scheme used for third generation cellular systems that are being rolled out in various parts of the globe. Voice capacity offered is very high due to interference control mechanisms, including frequency reuse of 1. The most major difference between cdma and wcdma is in the group of technology that it is grouped with. Standardized in 3gpp release 7 as direct tunnel with collapsed rnc.
Umts system architecture and protocol architecture overview on overall system architecture umts network architecture and elements mobile station. Pdf wcdma system standardization, interfaces and power control. Umts system architecture ue user equipment that interfaces with the user utran umts terrestrial radio access network handles all radio related functionality wcdma is radio interface standard here. The reference list contains the related 3gpp specifications. The umts system consists of a number of logical network elements that. 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. Institute of communications engineering national sun yatsen university. Wcdma has the capacity to easily handle bandwidthintensive applications such as video, data, and image transmission necessary for mobile internet services. Wcdma wideband code division multiple access and lte long term evolution are mobile communication technologies that falls under the 3rd generation partnership project 3gpp releases. Lte standards are part of the latest 3gpp releases, which are considered as 4th generation 4g, and wcdma is the older technology which was specified as 3rd.
858 1227 774 798 956 452 1367 728 510 1400 903 1473 606 850 1477 91 100 226 923 1333 928 12 390 1089 233 1239 1116 318 671 906 1391 1273 1574 737 561 1355 1466 1114 951 1030 1172 77 1272