Evolutionary analysis of gsm, umts and lte mobile network architectures. The channels logical, transport and physical mapping information through the channels the umts terrestrial radio access network utran requirements of the utran utran nodes and their functionality node b controlling radio network controller serving radio network. Logical channels can be broadly divided into two types. Physical channels and mapping of transport channels onto physical channels fdd 3g ts 25. Umts universal mobile telecommunications service is a thirdgeneration 3g broadband, packetbased transmission of text, digitized voice, video, and multimedia at data rates up to 2 megabits per second mbps. The forward channel is the direction of the communication or mobiletocell downlink path. Channel allocation for umts multimedia broadcasting and multicasting article pdf available in ieee transactions on wireless communications 711. The physical channels are determined by the timeslot, whereas the logical channels are determined by the information carried within the physical channel. 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. Mobile class targets 100 mbps with high mobility and nomadic local area class targets 1 gbpswith low. Logical channels further can be divided into two categories as control channels and traffic channels. Transport channels these are mapped between mac and phy.
Irving2,b 1 department of computer science, federal university lafia, nasarawa state, nigeria 2 department of computing, engineering and technology, university of sunderland, sunderland, sr6 0dd, united kingdom. For complete listing of logical, transport and physical channels including directions and mapping see umts channels page what are the umts data rates of the services. To understand the mapping of the logical channels onto physical channels, it is good to understand the two dimensions in time used by the gsm frame structure for more details on the frame structure, see section 3. There are broadly two categories of logical channels available. One of those frequency channels is defined as the basefrequency beacon frequency or bcch frequency. Gsm uses a variety of channels in which the data is carried. This application note introduces lte fdd and tdd technology and related testing aspects. This course provides a comprehensive and detailed explanation of the umts air interface. Jan 14, 2011 logical channels in gsm are defined by the type of information that is carried over them.
Part of theelectrical and electronics commons, and theelectromagnetics and photonics commons. Based on, as mentioned earlier, whether they carry gsm traffic ie, speech or data or gsm. Mapping between logical channels and transport channels. Logical channelsthese are control and traffic channels and are mapped between rlc and mac. Umts logical channels and transport channels 3glteinfo.
Logical channels define what type of information is being transferred and transport channel defines how the information is being transferred logical channels. Lte also k nown as evolved utra and evolved utran provides new physical layer concepts and protocol architecture for umts. This is the only channel type enabling pointtomultipoint communications in which short messages are simultaneously transmitted to several mobiles. Based on, as mentioned earlier, whether they carry gsm traffic ie, speech or data or. Umts is designed to cope with the growing demand of mobile and internet applications with required quality of service parameters.
In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on a specific network. Mac maps the logical channels on to transport channels. In lte we have 7 logical channel in downlink and 3 logical channels in uplink. Logical channels in gsm are defined by the type of information that is carried over them. From the physical layer, the mac layer uses services in the form of transport channels. 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. Evolutionary analysis of gsm, umts and lte mobile network architectures paschal a. At first i will center the study in the objectives and main characteristic of this generation. Cdma channels can be broadly categorized as forward channel and reverse channel. Transport channel, logical channel and macd flow numbering. In 3gpp specifications, several types of data transfer services are offered by mac. Data channels data channels support a variety of data rates 2. Umts networks andreas mitschelethiel, jens muckenheim oct12 4 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 vlr g bts bts um rnc abis msc b pstn pstn source. The mac layer provides data transfer services on logical channels.
Myung 2 beyond 3g international mobile telecommunications imt2000 introduced global standard for 3g. Universal mobile telecommunications system umts is a 3g cellular telecommunication system. 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. By doing this, the payload data as well as the control and status data can be carried in an efficient manner. An overview of the 3g network umts can in many aspects be looked upon as an extension to gsm and gprs. Traffic channels, for call data control channels, to communicate service data between network equipment nodes. Umts channels logical,transport,physical umts channels. Umts air interface course description this course provides a comprehensive and detailed explanation of the umts air interface.
Jan 11, 20 logical channels reside between rlc sublayer and mac sublayer which are layer 2 protocols in lte protocol stack. Physical channels, logical channels, network, and operation use this concise guide to learn the fundamental components, basic operation, services, and terminology used for umts code division multiple access cdma systems. Umts networks andreas mitschelethiel, jens mueckenheim nov. Here, we explain the main type of the control chanels like broadcast channels bchs. Logical channels reside between radio link control rlc and medium access control mac layer. Aug 25, 2009 logical channels define what type of information is being transferred and transport channel defines how the information is being transferred. Systems beyond imt2000 imtadvanced is set to introduce evolutionary path beyond 3g. Aug 03, 2017 in lte we have 7 logical channel in downlink and 3 logical channels in uplink.
May 26, 2016 the defintion of logical channels and details of traffic channels has been discussed in the previous video. The universal mobile telecommunications system umts is a third generation mobile cellular system for networks based on the gsm standard. The logical channel used for user data transmission e. In so doing, the architecture of the radio interface, 6 channel structures, the cdma physical layer, the. Each logical channel type is defined by the type of information that it transfers.
Different bursts are mapped to these channels uniquely as per gsm technical specification 05. Introduction to umts technology 1 principles of wcdma 1 spread spectrum 1 protocols and channels 2 protocol architecture 2 layer 1 l1 or physical layer 2 layer 2 l2 or data link layer 2 layer 3 l3 or network layer 3 transport channels 4 downlink common and dedicated 4 uplink common and dedicated 4 logical channels 5 control channels 7. Indoor radio measurement and planning for umtshspda. Logical channels are distinguished by the information they carry and can be classified in two ways. A set of logical channel types is defined for different kinds of data transfer services. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Umts etsi proposed gsmnatdma gprs evolution under name universal mobile telecom.
This channel broadcasts information to ues relevant to the cell, such as radio. As shown in the figure, there are three types of umts channels viz. Pdf channel allocation for umts multimedia broadcasting. In this tutorial different types of logical channels and transport channels and their mappings are described. The radio access specifications provide for frequency division duplex fdd and time division duplex tdd variants, and several chip rates are provided for in the tdd option, allowing utra technology to operate in a wide range of bands and coexist with other radio access technologies. Umts long term evolution lte technology introduction. In case of dispute, the reference shall be the printing on etsi printers of the pdf version kept on. Umts wcdma is one of the third generation wireless systems. The greatest changes are related to the access part of the network. Comprehesive coverage of umts 3g news, licensing, business developments, 3g wcdma telecommunication technology, multi media mobile phones and future communications. The rnc has the responsibility to control overall logical resources of the node b. This tutorial on umts covers umts logical channels, transport channels and physical channels. Umts is an umbrella term for the third generation radio technologies developed within 3gpp. They are used to transport speech, user data, high layer signally, cell specific information to name a few.
In gsm, these channels are separated into physical channels and logical channels. The broadcast channels bch carry only downlink information and are responsible mainly for synchronization and frequency correction. This chapter explains the functionalities of these channels. Half rate traffic channels at a net bit rate of 11. The following picture depicts the logical channel hierarchy. As shown in the figure there are two main types of channels in the gsm. May 27, 2014 the data, whether user traffic or signalling information, are mapped onto the physical channels by defining a number of logical channels. A gsm basestation called base transceiver station or bts has one or more gsm frequency channels arfcn. Introduction in telecommunications a channel, refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel.
Wcdma osi model radio resource control rrc logical channels rlc rlc rlc what is transmitted medium access control mac transport channels how it is transmitted physical layer physical channels code,frequency,etc. Introduction to wcdma physical channels, logical channels. This course offers a technical overview of umts, focusing on the umts air interface wcdma, radio network and core network. The umts world is an 3g mobile system news and information provider.
Gsm channels university of engineering and technology. Performance of tcp over umts common and dedicated channels. Intermediary channels between logical and physical, information moves through transport channels in units called transport blocks. In downlink there are 4 control channel which carried common channel information as well as dedicated channel information. Following table lists the logical channels that are used by lte. Firstly, logical traffic channels carry data in the user plane, while logical control channels carry signalling messages in the control plane. Broadcast control channel bcch it used for broadcasting mibssibs. February, 28th 2005 overview in this document i make a study of third mobiles generation systems. Umts ictp miramare umts channels logical, transport and physical channels logical channel. Umts is designed to increase a subscribers data rates and system capacity. Evolutionary analysis of gsm, umts and lte mobile network. As they tranverse between layers they map to other layer frames. Physical channels these are basic physical resource.
What is umts universal mobile telecommunications service. The channels logical, transport and physical mapping information through the channels the umts terrestrial radio access network utran requirements of the utran utran nodes and their functionality node b controlling radio network controller serving radio network controller drift radio network controller general interface. Logical channels can be classified into two general groups. Indoor radio measurement and planning for umtshspda with antennas marcellinus iheanyi eheduru university of wisconsinmilwaukee follow this and additional works at. Consists of many logical network elements similar to the 2g systems. Coherence bandwidth limits the maximum data rate of the channel. Umts offers a consistent set of services to mobile computer and phone users, no matter where they are located in the world.