The iucs, iups, iub, and iur interfaces are implemented on the atm network. Uplink, downlink in separate frequency bands tdd time division duplex. Cdma code division multiple access or cdma has its roots in wwii era spread spectrum technology. Novel techniques for broadcasting or multicasting content in an existing cellular environment were developed for cdma2000 and wcdma networks, and both cdma2000 and wcdma families share the same downlink multicasting. The training presents functionality related with the use of r99 dedicated channels, as well as, hspa. This radio interface has great capability on which third generation of. Wcdma air interface wcdma air interface course gives the detailed description of the wcdma fdd technology and its use in the umts network. One of the main air interface for 3g system is referred as wide band cdma wcdma. In addition to wcdma, the other air interfaces that can be used to provide third generation services.
Wideband code division and multiplication access souhaibe barkat. Lucent technologies proprietary 24 physical channels uplink dedicated channels dedicated physical data channel dpdch dedicated physical control channel dpcch common channels physical random access channel prach physical common packet channel pcpch downlink dedicated channel dedicated physical channel dpch common channels. Unlike wcdma, lte supports variable bandwidth from 1. Wcdma air interface as well as wcdma the other air interfaces that can be used are edge and cdma2000. By providing a deep understanding of the wcdma air interface, the practical approach of this third. Carry the large majority of data and signaling messages across air interface. The wcdma specification has been created in 3gpp the 3 rd generation partnership project. Pdf wcdma system standardization, interfaces and power control. Wcdma is the most widely adopted air interface standard for third generation 3g mo. Above command had c clean erase all files to make a rebuild from startc cleanall erase all files made by previous compilations, installations the opencells limesdrinstallation used. Highspeed downlink packet access 283 wcdma l1 ue iubiur node b srnc hsdpa user plane uu.
However, wcdma air interface is specifically designed with envision to support real time multimedia services. Thus the serving gateway is some kind of distribution and packet data anchoring function within epc. When the data rates are compared, lte provides massive downlink and uplink speeds than wcdma. Current 3gpp standards incorporate the latest revision of the gsm standards. Oct 21, 2012 although wcdma is designed to operate on evolved gsm core networks, it uses code division multiple access cdma for its air interface. Wcdma for umts principles u introduction u cdma background history ucode division multiple access cdma u why cdma. This site is like a library, use search box in the widget to get ebook that you want.
Pkzip, used to compress files in the computer industry uses a 32bit checksum for greater. Multicarrier cdma is the evolution of is95 for high data rates using three is95 carriers, and is introduced in chapter 14. Gprs is a packetbased radio service that overlays additional control signalling on an existing gsm network and uses the same air interface as a gsm handset. Utran umts terrestrial radio access network handles all radio related functionality wcdma is radio interface standard here. Overview of umts wcdma technology standardization, cdma technology, wcdma features, spreading and coding, wcdam air interface protocol, uplink physical channels, pdf file. The third edition now covers the key features of 3gpp release 6 ensuring it remains the leading principal. The mobile user objective system muos is a geosatellite communications system derived from the terrestrial cellular wcdma air interface. The technical specifications cover not only the radio part air interface and core network, but also billing information. Their experience with second generation mobile networks such as gsm is not enough, as attention should be. The physical layer has interface to both mac and rrc sublayer. Practical tips on wcdma measurements this is a practical wideband code division multiple access wcdma measurement.
The physical link is implemented by mean of a radio link. The wcdma technology provides the umts system some of the new functionalities on the air interface. Carries the broadcast control channels master information block mib. For other wideband cdma proposals it can be written as w zeon pdf driver trialcdma. Layer 2 consists of medium access control mac radio link control rlc the broadcast multicast control bmc packet data convergence protocol pdcp 3. It describes the need for power control and its implementation and soft and softer handover. The training focuses on physical layer operation and procedures and other functions closely related with the physical layer. Third edition edited by harri holma and antti toskala both of nokia, finland. The training presents functionality related with the. Carries paging messages that originated from paging control channel pcch. In north america that spectrum has already been allocated for operators using second generation systems and no new spectrum is available for imt2000. Highly regarded as the book on the air interface of 3g cellular systems wcdma for umts has again been fully revised and updated. How wcdma uu interface posted on 24 march, 2014 wdma air interface or uu interface contains 3 layers which describe as follow, the wcdma layer 1 supports all functions required for the transmission of bit streams on the physical medium.
Wideband code division multiple access wcdma is the physical layer used for universal terrestrial radio access utra fdd mode. In addition to wcdma, third generation services can also be provided with edge or with multicarrier cdma. Advanced radio interface optimisation and application note. Wcdma based system all users share the same frequency time domain. Edge is the evolution of gsm for high data rates within the gsm carrier spacing. Transport channels, logical channels, radio bearers. The wcdma infrastructure is compatible with gsm mobile radio communication system. Concept of an ofdm hsdpa air interface for umts downlink.
The same air interface,wcdma, is to be used in europe and asia, including japan and korea using the frequency bands around 2 ghz. Umts system architecture and protocol architecture overview on overall system architecture. The same air interface wcdma is to be used in europe and asia including japan and korea using the frequency bands around 2 ghz. In fact, many wcdma technologies can be traced back to the 2g cdma system. The implementation of wcdma is a technical challenge because of its complexity and versatility. Wcdma system overview national sun yatsen university. This article provides a comprehensive introduction to wideband cdma.
Billions of dollars have been spent procuring these air interfaces. Sadowsky general dynamics c4 systems 8201 east mcdowell road, md h2171 scottsdale, az 85257 480 441 1534 email protected abstract wcdma is a 3rd generation wireless communication system developed for terrestrial cellular systems. It relays the packet data within epc via the s5s8 interface to or. The third edition now covers the key features of 3gpp release 6 ensuring it remains the leading principal resource in this constantly progressing area. Supports both packetswitched and circuitswitched data services. It is one of the air interface used with umts mobile communication standard which allows communication between ue and node b. Wcdma technology has emerged as the most widely adopted third generation air interface. However on plugging in the sim, the lte option disappeared, leaving only wcdma umts and good ol gsm. Umtstdd is a mobile standard built upon the umts 3g standard, using a tdcdma, tdscdma, or other 3gppapproved, air interface that uses time division duppg lexing tdd. Wcdma is the most widely adopted air interface standard for third generation 3g mobile networks. 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. Wcdma was specified in the 3gpp release 99 and 4 of the specification, while lte was specified in the 3gpp release 8 and 9. This interface transfers such information as radio resource management. The wcdma specification has been created in 3gpp the 3 rd generation partnership project, which is the joint standardization project from europe, japan, korea, the usa and china.
One of the main problems of umts network is tcp throughput degradation in the large delay bandwidth products up to around 20k bytes. Enlzt 123 7279 r4a 11 wcdma air interface 2g circuit switched voice circuit. Prerequisites a basic understanding of gsm architecture and procedures would be an. Umts as a key member of 3g mobile technologies identified by the itu.
Wcdma air interface fundamentals telecommunications radio. Multilevel simulation of wcdma systems for thirdgeneration wireless applications dr. Uplink, downlink in the same frequency band and separated in time. And european wideband cdma proposals were agreed upon. Difference between cdma and cdma pdf semantic scholar. Radio interface zeon pdf driver trial tw transport channels. Tcp performance enhancement for umts access network. The chapter also discusses other key elements of the wcdma air interface such as power control and soft and softer handovers. It supports conventional cellular voice, text and mms services, but can also carry data at high speeds, allowing mobile operators to deliver higher. Baseband 52165212 handling 3 days, lzu1082172 wcdma ran w15 radio network functionality 4 days, lzu1089949.
The documents are made available without charge on 3gpps web site. The protocols used in the air interface, from the viewpoint. Umts air interface protocol stack part 1 adel mounir. Every rnc is connected to sgsn through the iups interface, and to an msc through the iucs interface. The transport channel carrying the user data with hsdpa operation is. Wcdma ran w15 protocols and procedures 5 days, lzu1089950. Wcdma for umts radio access for third generation mobile communications. A spreading code pseudocode is used to separate a users transmission from that of others. Advanced radio interface optimisation and troubleshooting in 3g networks application note introduction in the launch of 3g services, operators are facing new kinds of qos challenges due to the new wcdma air interface technique. Difference between wcdma and lte compare the difference.
Wcdma is a wideband directsequence code division multiple access dscdma system. The tta1 and tta2 air interface proposals later renamed global cdma 1 and 2 were based on synchronous and asynchronous wideband cdma technologies respectively. Umts air interface protocol stack part 2 adel mounir duration. Fma2 is a singlecarrier wideband cdma solution using a 4. Hspa high speed packet access is a collection of mobile telephony. Below table shows some of the key parameters of wcdma air interface. Lucent technologies proprietary 24 physical channels uplink dedicated channels dedicated physical data channel dpdch dedicated physical control channel dpcch common channels physical random access channel prach physical common packet channel pcpch downlink dedicated channel dedicated physical channel dpch common channels common pilot channel cpich primary common. This feature requires no change to the air interface, which implies no impact to the ue. In fact, the majority of the 3g systems in operation employ cdma, while the rest use time division multiple access tdma. Pkzip, used to compress files in the computer industry uses a 32bit.
Spreading and scrambling transport channel combining soft handover compressed mode power. Gsns constitute the interface between the radio access network and the. Korean standardization efforts were later moved to 3gpp and 3gpp2 to contribute to wcdma and cdma2000. Pdf uplink simulation of the umts air interface researchgate. Selection of transport format for each transport channel. Pdf an integrated approach is presented for uplink and downlink air interface capacity evaluation and traffic analysis for the multiservice. The term wcdma also refers to one of the itus imt2000 standards, a type of 3g cellular network. Feasibility study of a wcdma direct airtoground link in. Concerns for two months and prepare our project report on the topicrd projects in the field of wideband cdma have been going on in. Commonalities between qualcomm incorporated october. The gsm air interface is described here, first in general terms, examining the channels used by the mobile and the network to establish communications, then with increasing detail, the procedures and messages exchanged between the peer layers of the gsm protocol stack. Pdf wcdma air interface student book lzt 123 7279 r4a. Wcdma is the air interface standard proposed by arib and etsi for 3rd generation mobile systems.
Umts uses wideband code division multiple access wcdma as its radio air interface. Comparison between cdma and tdma air interface for. Commonalities between cdma2000 and wcdma technologies table of contents. A knowledge of the structure and usage of the physical channels in the downlink and uplink directions, together with a knowledge of spreading and modulation, provides a good background for understanding how the wcdma radio network works. Multilevel simulation of wcdma systems for thirdgeneration. Wcdma for umts radio access for third generation mobile communications third edition edited by harri holma and antti toskala both of nokia, finland.
Final report an evaluation of potential gprs 900 mhz and. Tcp performance enhancement for umts access network liang hu. Standards institute as candidates for umts air interface and. Pdf wcdma system standardization, interfaces and power. It is a complete set of specifications in which a detailed protocol defines how a mobile phone communicates with the base station or nodeb.
It supports conventional cellular voice, text and mms services, but can also carry data at high speeds, allowing mobile operators to deliver higher bandwidth applications including streaming and. Browse internet while downloading a file from a corporate. A conventional single user matched filter receiver is strictly suboptimal in terms of capacity. Mar 24, 2014 how wcdma uu interface posted on 24 march, 2014 wdma air interface or uu interface contains 3 layers which describe as follow, the wcdma layer 1 supports all functions required for the transmission of bit streams on the physical medium. This presentation discusses about the wcdma air interface used in 3g i. Gsm air interface channels part 2 adel mounir duration. It therefore connects via the s1u interface towards enb and receives uplink packet data from here and transmits downlink packet data on it. Wcdma networks, and both cdma2000 and wcdma families share the same downlink multicasting technologies. Receivers with advanced ic algorithms can significantly improve the system performance. Click download or read online button to get wcdma for umts book now. Wcdma system standardization, interfaces and power control.
Wcdma air interface course gives the detailed description of the wcdma fdd technology and its use in the umts network. With hsdpa, the iub interface between node b and rnc requires a. Wcdma air interface access method is used in the european 3 rd. Commonalities between qualcomm incorporated october 2006. An rnc may connect to several rncs through the iur interface. Jul, 2011 what is the difference between wcdma and lte. Wcdma air interface fundamentals free download as powerpoint presentation. In europe, japan, korea, and the united states, wideband cdma systems are currently being standarized. The characteristics of a transport channel are defined by its transport format or format. Wcdma can be viewed as a successor of the 2g cdma system. 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. Although wcdma is designed to operate on evolved gsm core networks, it uses code division multiple access cdma for its air interface. What is wideband code division multiple access wcdma.
Radio access network dimensioning for 3g umts pdf radio access network dimensioning for 3g umts by. The main advantage of this is its flexibility in resource management. Wcdma for umts download ebook pdf, epub, tuebl, mobi. Gsm europe and large parts of the world, cdmaone americas, damps americas, and pdc japan. Wcdma power control with the long geosatellite round.
In the ofdm hsdpa concept, the wcdma air interface is replaced by an. Wcdma is a third generation mobile communication system that uses cdma technology over a wide frequency band to provide highspeed multimedia and efficient voice services. Um interface air interface is defined as the communication interface between a mobile station and a base transceiver station bts and used for the interconnection between a mobile station and the fixed parts of a cdma system. Sawahashi, and adachi, c i v estimation using time muilipiexed piiol syinbois jbrcoherenr rake coinbining for ds cdm4 mobile radio.
The chapter presents the main system design parameters of wcdma. Instead of assigning specific frequencies or time slots to each user, the systems users are distinguished by assigning codes. Lowest layer in this interface is physical layer, phy. Pdf a framework for umts air interface analysis researchgate. What is umts network architecture radio access radio interface frequency bands umts cdma modulation data channels umts tdd tdsdcdma handover. Introduction to wcdma wcdma for umts wiley online library. Understanding the wcdma radio interface is essential for engineers dealing with umts radio networks.
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