The iub interface is the l2 to l1 interface between a node b and the rnc. Wcdma technology provides some advantages for the operator in that it allows the data, but also improves the voice of base. Being newer and more advanced, wcdma is now the technology that people want and it is slowly being deployed in a lot of. As wcdma mobile penetration increases, it allows wcdma networks to carry a greater share of voice and data traffic.
The tta1 and tta2 air interface proposals later renamed global cdma 1 and 2 were based on synchronous and asynchronous wideband cdma technologies respectively. For other wideband cdma proposals it can be written as w zeon pdf driver trialcdma. The node b provides the connection between mobile phones ues and the wider telephone network. 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. In gsmgprsedge radio module both edgegsmgprs and wcdma air interface mode, the digital baseband controller controls n1200 thor the radio system through a 3wire serial bus. I am using below adb commands for changing preferred network mode to gsm where value is 1, can any one give the values for other modes like gwl gsmwcdmalteonly lte only.
Pdf wcdma system standardization, interfaces and power control. Lucent technologies proprietary 2 objectives describe the requirements and drivers behinds the w cdma air interface. The interface follows a standard format for smartcards. It supports conventional cellular voice, text and mms services, but can also carry data at high speeds, allowing mobile operators to deliver higher. This is the electrical interface between the usim smartcard and the me. Spreading wcdma channels physical layer functions spreading. How wcdma uu interface 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. In the uncoordinated case it is 3gpp recommended practice that the center. In fact, the majority of the 3g systems in operation employ cdma, while the rest use time division multiple access tdma. The training focuses on physical layer operation and procedures and other functions closely related with the physical layer. Umts capacity simulation study andres felipe cosme hurtado.
Lowest layer in this interface is physical layer, phy. To restart the ericsson w20, click the reboot button on the system web page. Two modes are specified for the umts air interface. The radios are based on stateoftheart multistandard technology and can operate in gsm, wcdma, lte, and 5g mode using fdd, tdd, as well as supplementary downlinks. The wcdma technology provides the umts system some of the new functionalities on the air interface. The mobile is assumed to take an error free measurement sample every. View 104780016ericssonwcdmaranfeaturesparametersandcounters from telecommunication 1234 at st.
Pdf since 1994, europe and north america have taken divergent approaches to managing spectrum for wireless voice and. The term wcdma also refers to one of the itus imt2000 standards, a type of 3g cellular network. It is also difficult to jam because its energy is spread over so wide a. As digital calls are tend to be free of stagnant and background noise, the poor. Issues and optimization of umts handover diva portal. The operator license can be shared highly efficiently between lte and gsm portions with the rf sharing solution. The comparison reveals that eutran consists of one type of nodes, namely evolved node b enodeb, and the variety of interconnections is. Enlzt 123 7279 r4a 7 wcdma air interface intentionally blank 8. Performance of handover algorithms kimmo hiltunen, 39195v. If you cannot access the ericsson w20 web pages, remove the power cable to disconnect the ericsson w20 from power and wait a moment before reconnecting the cable. Difference between wcdma and gsm difference between. 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. As in all cellular systems, such as umts and gsm, the node b contains radio frequency transmitters and the receivers used to communicate directly with mobile devices. This is the wcdma radio interface, which is the subject of the main part of this book.
Spreading and scrambling transport channel combining soft handover compressed mode power control. Understanding the wcdma radio interface is essential for engineers dealing with umts radio networks. W cdma wideband code division multiple access, umtsfdd, utrafdd, or imt2000 cdma direct spread is an air interface standard found in 3g mobile telecommunications networks. Pdf wcdma air interface student book lzt 123 7279 r4a. Wcdma wide band code division multiple access umts before we talk about 4g or gsm. Sony ericsson k850 troubleshooting manual pdf download.
Fma2 is a singlecarrier wideband cdma solution using a 4. Umts through wcdma can be summarized like a revolution of the air interface accompanied by a revolution in the network of their architecture. Wcdma air interface fundamentals free download as powerpoint presentation. 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. 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. What is the technical difference between selecting gsm and selecting wcdma in network mode settings menu. In addition to wcdma, the other air interfaces that can be used to provide third generation. Wcdma air interface training part 5 network packet. Jun 19, 2015 wcdma wide band code division multiple access umts before we talk about 4g or gsm. Overview of umtswcdma technology 31 air interface procedures cell search downlink scrambling code and common channel frame synchronization of that cell will be determined during cell search all common physical channel timings are related to the timing of pccpch, so only the timing of pccpch need to be found out.
A detailed description of the physical layer of etsi wcdma is given together with an overview of the higher layers of the wcdma radio interface. This interface is the termination point for the rbs managed resources. Etsi standards, which is available free of charge from the etsi secretariat. Jul, 2011 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. View and download ericsson wcdmahsdpa user manual online.
Performance of tcp over umts common and dedicated channels. 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. In case of a soft handover the mobile is simultaneously connected to several base stations. Pdf wcdma system standardization, interfaces and power.
In umts, in addition to channelisation, codes are used for synchronisation and scrambling. Although wcdma is designed to operate on evolved gsm core networks, it uses code division multiple access cdma for its air interface. Wcdma ran features parameters and counters agenda wcdma ran. 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. Baseband 52165212 handling 3 days, lzu1082172 wcdma ran evoc 8200 troubleshooting 3 days, lzu1089165. How wcdma uu interface wdma air interface or uu interface contains 3 layers which describe as follow, the wcdma layer 1 supports all functions required for. Wcdmathird generation radio interface springerlink. The mobile user objective system muos is a geosatellite communications system derived from the terrestrial cellular wcdma air interface. Wcdma vs gsm wcdma wideband code division multiplexing access and gsm are two technologies that are used in mobile telecommunications. Difference between wcdma and lte compare the difference. Umts combines three different terrestrial air interfaces, gsms mobile.
Wideband code division multiple access wcdma is the physical layer used for universal terrestrial radio access utra fdd mode. Wcdma air interface fundamentals telecommunications radio. Csempro telecom, ericsson, france telecom, nokia, siemens and of several university. 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. Reset the ericsson w20 to factory default configuration.
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. In contrast with gsm base stations, node b uses wcdmatdscdma as the air interface technology. Layer 2 consists of medium access control mac radio link control rlc the broadcast multicast control bmc packet data convergence protocol pdcp 3. You must know wcdma which stands for wide band code division multiple access. This paper also presents the wideband codedivision multiple access wcdma radio interface chosen by etsi as the basic radioaccess technology for the universal mobile telecommunications system umts. It uses wcdma as air interface, one of six air interfaces available. Wcdma air interface training part 5 free download as powerpoint presentation. The proposed 3g wideband cdma systems are complex in nature. The difference between these two is that gsm is a 2g technology and wcdma is a part of the newer 3g group of technologies. Wcdma and cdma2000 the radio interfaces for future. However, high performance radio access is critical to the success of umts and code division schemes allow network operators to make the most of their scarce radio spectrum allocation. 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.
Nokia, siemens, ericsson, france telecom, csempro telecom. Wide band cdma technology was selected to for utran air interface. 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 air interface lzt 123 7279 r6a ericsson 2006 1 wcdma air interface student book lzt 123 7279 r6a. Voice capacity offered is very high due to interference control mechanisms, including frequency reuse of 1.
Cdma is the industrys most sophisticated air interface. Wcdma and cdma2000 the radio interfaces for future mobile multimedia communications part idecember 15, 2001 3 in the second part of the report, the main technical approaches to wcdma air interface technology are going to be discussed in detail as it will be mostly focused on physical. The training presents functionality related with the use of r99 dedicated channels, as well as, hspa. Wcdma was adopted as a standard by the itu under the name imt2000 direct spread. This is the hardware that is connected to the mobile phone network that communicates directly with mobile handsets. The universal mobile telecommunications system umts is a third generation mobile cellular. Wcdma air interface error detection and correction. Hspa high speed packet access is a collection of mobile telephony. Wcdma is based on cdma and is the technology used in umts.
Module both edgegsmgprs and wcdma air interface mode. Spreading means increasing the bandwidth of the signal. The same air interface wcdma is to be used in europe and asia including japan and korea using the frequency bands around 2 ghz. Macro, street macro, micro, and indoor radios in ericsson radio system for radio access networks. As an ofdma technology lte assumes small nominal guard band 10 %, excluding 1. Wcdma technology has emerged as the most widely adopted third generation air interface. Wcdma and cdma2000 the radio interfaces for future mobile multimedia communications part iiiaugust, 2001 2 7. Figure 120 shows a noisefree example where the received signal is a pure. 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. Wcdma air interface fundamentals telecommunications. The physical layer processing in the rbs is encapsulated between the iub and the uu interfaces. Node b is the telecommunications node in particular mobile communication networks, namely those that adhere to the umts standard.
In order to satisfy the future service and application needs several technical enhancements are being studied and standardized for wcdma in 3gpp. It is the basis of japans ntt docomos foma service and the mostcommonly used member of the umts family and sometimes used as a synonym for umts. This is an important feature of 3g system and is not found in 2g system. Ericsson assumes no legal responsibility for any error or damage resulting from the. Wcdma air interface as well as wcdma the other air interfaces that can be used are edge and cdma2000. Ericsson assumes no legal responsibility for any error or damage resulting from the usage. Further information on this subject can be obtained from the. Node b corresponds to bts base transceiver station in gsm. Cellular mobile communication systems may 16, 2006 niclas wiberg, ericsson research. Wcdma power control with the long geosatellite round. What is wideband code division multiple access wcdma. Fixed wireless terminal for wcdmahsdpa mobile networks.
The wcdma air interface was initially designed to support a wide variety of services with different qos requirements having a maximum bit rate of 2 mbs. Umts wcdma is a direct sequence cdma system where user data is multiplied with quasirandom bits derived from wcdma spreading codes. Pdf lte 10a air interface munteanu vitalie academia. It is a third generation network developed by ntt docomo and from 2g network cdma. The lte air interface is well scalable in terms of bandwidth. A key feature of wcdma air interface is its ability of transport multiple parallel services with different quality requirement on one connection. Wcdma ran w15 protocols and procedures 5 days, lzu1089950. 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. View 104780016 ericsson wcdma ranfeaturesparametersandcounters from telecommunication 1234 at st.
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