Atm core network independent of access network the specificity of the access network due to mobile system should be transparent to the core network. At first, the whole business flow from power on, to business, and then to power off can be viewed in the case that the user is not mobile, which is described as follows. Dec 31, 20 the ue can acquire at this stage various information e. There is a need for different types of terminal mobility support that are. The quality of a signaling service transmission depends on various factors i. The compressed mode can be activated separately for each measurement. Wcdma osi model radio resource control rrc logical channels rlc rlc rlc what is transmitted medium access control mac. Performance analysis of umts cellular network using sectorization based on capacity and coverage a. Iups but on many physical and logical connections and multiple legs. This tutorial on umts covers umts logical channels, transport channels and physical channels. Outside the umts service area, umts gsm ue will be connected to the network at reduced data rates via the um.
The successful trial, deployment, operation and troubleshooting of 3g or umts infrastructures and applications is. Signaling measurements on the packet domain of 3gumts. The ue attempts then to read the pcpich so as to extract the primary scrambling code used in the cell. No preconfigured timeslots or channels for signaling messages and user data first of all, umts networks use the packetswitched atm proto. To the best of authors knowledge, there is a lack of papers in the literature that either deal with the issue of umts signaling performance or present signaling experiments in real umts platforms. The impact of umtswcdma channel roundtrip time variations. The channel access delay is a variable delay over the radio channel faced by every ue trying to access the network and has a direct impact on the response time of the ue. This paper evaluates the performance of the transmission control protocol tcp vegas and compares its performance with tcp reno in a umts environment. Vehicular communication channels are characterized by a nonstationary time and frequencyselective fading process due to rapid changes in the environment. Therefore, we analyse the umts channel access delay. Masterclaw umts call and session trace application can be used to quickly find the reason why, e. Proactive call drop avoidance in umts networks shan zhou jie yangy dahai xuz guangzhi li zyu jin zihui gez mario b kossei. Services umts most of 3g licenses in europe required operator to deploy a umts system covering x% of population by a specific date y germany. In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on a specific network.
Umts objectives in umts tutorial 14 april 2020 learn umts. Wrc97, adopted at the world radiocommunication conference held in. Mapping between logical channels and transport channels. Uarfcn is the easy way of representing frequency pairs uplink and downlink in the umts system. The comparison reveals that eutran consists of one type of nodes, namely evolved node b enodeb, and the variety of. Atm core network independent of access network the specificity of the access network due to mobile system should be transparent to the core network, which may potentially.
Mobile termination mt represents the termination of the radio interface and, by that, the termination of an imt2000. As shown in the figure, there are three types of umts channels viz. Logical channels reside between radio link control rlc and medium access control mac layer. Performance analysis of umts cellular network using. It is an acronym for evolved universal mobile telecommunications system terrestrial radio access, also referred to as the 3gpp work item on the long term evolution lte also known as the evolved universal terrestrial radio access eutra in early drafts of the 3gpp. The nonstationary fading process can be characterized by assuming local stationarity for a region with. Course length 3 days widermind communicates the knowledge you need to develop and implement new technologies for current and future network operations. The universal mobile telecommunications system umts is a third generation mobile cellular system for networks based on the gsm standard. Principles of the umts terrestrial radio access network utran mitrevski kiril, zgonjanin dusko faculty of electrical engineering, belgrade i introduction to umts the universal mobile telecommunications system umts is a third generation mobile communication system, based on a horizontal network integration.
Since the primary scrambling codes are grouped into 64 groups of 8 scrambling codes and the ssch has. Similar to gsm arfcn, uarfcn is used to simplify the radio frequency planning and maintenance process in the umts networks. By doing this, the payload data as well as the control and status data can be carried in an efficient manner. Umts logical channels and transport channels 3glteinfo. Principles of the umts terrestrial radio access network utran mitrevski kiril, zgonjanin dusko faculty of electrical engineering, belgrade i introduction to umts the universal mobile telecommunications system umts is a third generation mobile communication system, based. The umts frequency bands are radio frequencies used by third generation 3g wireless universal mobile telecommunications system networks. This completely revised and updated edition of the highly successful umts signaling provides a deep insight into all aspects of umts signalling. To manage the data carried, the 3g umts radio interface uses a series of data channels which can be categorised as logical, physical or transport channels. Cdmaumts university technical training sessions for ctia. 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. Baitul al sadi, mrinal kar department of electronics and telecommunication engineering. Spreading factors, ovsf indexes and scrambling codes used in other downlink channels, important parameters for prach transmission, measurement parameters, transport formats etc.
How channel mapping in wcdma broadcast control channel dtch dedicated traffic channel rach random access channel fach forward access channel dsch downlink shared channel dcch dedicated control channel cpch common packet channel ctch common traffic channel dch dedicated transport channel pcch paging control channel pch paging channel ccch common control channel. For the umts system, the channel raster is 100 khz. Developed and maintained by the 3gpp 3rd generation partnership project, umts is a component of the international telecommunications union imt2000 standard set and compares with the cdma2000 standard set for networks based on the competing cdmaone. Umts terrestrial radio access network utran umts terrestrial radio access utra. The comparison reveals that eutran consists of one type of nodes, namely evolved node b enodeb, and the variety of interconnections is. An important means for improving the costefficiency in modern mobile radio networks is to dimension the radio access network carefully. A dialogue or procedure call trace is a trace on one interface e. Adjacent channel interference in umts systems in the 2000. Protocol analysis in umts networks the analysis of protocol recordings in umts is much more complex than in gsmgprsnetworks for a number of reasons. Cdmaumts university technical training ctia wireless 2005 wcdma umts high speed downlink packet access hsdpa overview cdmaumts university. Handover between umts and gsm is supported, and handover between umts and other 3g systems e. Principles of the umts terrestrial radio access network. Following the initial launch of the first network in the uk, the second launch a few years later was known as 3 which was a forerunner to what we now know as 3g, getting its name from the gsm standard.
Principles of the umts terrestrial radio access network utran. Umts etsi proposed gsmnatdma gprs evolution under name universal mobile telecom. Xi li presents innovative analytical models and algorithms for the dimensioning of the 3g umts radio access network ran. As they tranverse between layers they map to other layer frames.
Bulk data transfer was considered in the simulation with. Prerequisites the participants should be familiar with umts network architectures and ss7 signalling. Sumts sumts defined as per the 3gpp specifications, stands for the satellite component of the universal mobile telecommunication system. Cdmaumts university technical training ctia wireless 2005 wcdma umts high speed downlink packet access. Developed and maintained by the 3gpp 3rd generation partnership project, umts is a component of the international telecommunications union imt2000 standard set and compares with the cdma2000 standard set for networks based on the competing. In section 2, an overview of adjacent channel interference in terms of coverage and capacity is presented. How channel mapping in wcdma broadcast control channel dtch dedicated traffic channel rach random access channel fach forward access channel dsch downlink shared channel dcch dedicated control channel cpch common packet channel ctch common traffic channel dch dedicated transport channel pcch paging control channel pch paging channel ccch common.
They were allocated by delegates to the world administrative radio conference warc92 held in malagatorremolinos, spain between 3 february 1992 and 3 march 1992. That why, a logical channel determines the kind of information it uses. In the downlink, data frames from higher layer transport channels. Aug 25, 2009 logical channels define what type of information is being transferred and transport channel defines how the information is being transferred. An operator needs 3 4 channels 2x15 mhz or 2x20 mhz to be able to build a highspeed, highcapacity network. Umts stands for universal mobile telecommunications system and is also commonly referred to as the global system for mobile communications. Analysis of umts radio channel access delay sciencedirect. Umts networks andreas mitschelethiel, jens mueckenheim nov. The chapter structure has been reworked for improved usability for readers, as well as including many new features and updates. May 25, 2019 umts stands for universal mobile telecommunications system and is also commonly referred to as the global system for mobile communications.
Srnc performs dynamical control of power for dedicated channels. The umts takes a phased approach toward an allip network by extending second generation 2g gsmgprs networks and using wideband code division multiple access cdma technology. Comprehensive coverage of umts 3g news, licensing, business developments, 3g wcdma telecommunication technology, multi media mobile phones and future communications. Umts objectives in umts tutorial 14 april 2020 learn. Uarfcn calculator uarfcn to frequency conversion formula. Annex 1 critique of ofcom analysis of umts site counts at. In umts the mobile station ms is called user equipment ue and is constructed in a very. Utran logical channels to transport channel mapping 3gpp release 99. Channel raster is the steps or frequencies that can be used by a communication device. Eutra is the air interface of 3rd generation partnership project long term evolution lte upgrade path for mobile networks.
The umts world is an 3g mobile system news and information provider. The cross reference between gsm, umts, 3gpp and etsi identities can be found under. They are shorter than reported in measurement studies of north american and eu. Cdmaumts university slide 8 release 99 channels release 99 channels this diagram shows possible mappings of logical, transport, and physical channels in the control. Logical channels define what type of information is being transferred and transport channel defines how the information is being transferred logical channels. In this tutorial different types of logical channels and transport channels and their mappings are described. In umts, uarfcn stands for utra absolute radio frequency channel number. The medium access control mac layer at the umts radio interface is based on slotted aloha mechanism. Fokhray hossain department of computer science and engineering. In section 3 a brief description of the simulator implemented is outlined.
Umts channels radio resource management physical layer. Umts requirements of the new architecture there is a new architecture developed that covers good scalability, separately for user plane and control plane. The pcpich is always scrambled by the primary scrambling code of the cell and is spread a factor 256 and an ovsf whose index is zero. Utran umts terrestrial radio access network handles all radio. In the medium scenario, the 900 mhz incumbents deploy umts 900, and the 2100mhz operators some or all depending on the volume can supply an equivalent mobile data service at 2100mhz, although there may or may not be a cost advantage in the 2100mhz operators having access to 900mhz spectrum. Adjacent channel interference in umts systems in the 2000 mhz. Outside the umts service area, umtsgsm ue will be connected to the network at reduced data rates via the um.
Universal mobile telecommunications system umts is a thirdgeneration cellular network that enables highspeed mobile internet access. Signaling measurements on the packet domain of 3gumts core. There are broadly two categories of logical channels available. Impact of signaling load on the umts call blockingdropping. Maximum data rates are 115 kbps for cs data by hscsd, 171 kbps for ps data by gprs, and 553 kbps by edge. The umts channels are communication channels used by third generation 3g wireless universal mobile telecommunications system umts networks. The umts is designed to deliver pictures, graphics, video communications, and other multimedia information, as well as voice and data, to mobile wireless subscribers. S umts s umts defined as per the 3gpp specifications, stands for the satellite component of the universal mobile telecommunication system. Transport channel, logical channel and macd flow numbering.
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