Pdf on jan 1, 2009, jorg eberspacher and others published gsm architecture, protocols and services 3. The critical part in the gprs network is the mobile to gsn mssgsn link which includes the msbts, btsbsc, bscsgsn, and the sgsnggsn link. This is the system that has been in general use since the late 1800s. Our analysis of the pstn is focused on wired copper and fiber networks. The pstn isdn switch is a switch for 64 kbps voice. Vendors and operators an operator can not just assume that all vendors conform to all interfaces that are found in gsm specs ainterface is firmly adhered to by all vendors. The additional components of the gsm architecture comprise of databases and messaging systems functions. Gsm is a circuitswitched system that divides each 200 khz channel into eight 25 khz timeslots. Gsm network architecture, channelisation, signalling and.
Current technology permits to decrease the bitrate in gsm radio interface it is kbps for full rate and 6. Gsm stands for the global system for mobile communications. Pstn public switched telephone network 2 global system for mobile communications gsm the gsm network is a mobile voice network. Dcs 1900 is considered the gsm standard for north america and is called north american gsm. From this it can be seen that it is very similar to the more basic gsm network architecture, but with additional elements. Gsm architecture free download as powerpoint presentation. May or may not have external interfaces towards other networks. Gsm architecture numbering and routing gsm services gsm network architecture engr. Day02 gsm network architecture cankaya universitesi.
The mobile radiotelephone system includes the following subsystems. The combined traffic of the mobile stations in their respective cells is routed through a switch called mobile switching center msc. The present volume book 1 is the product of the detalization and study of the previous edition of. Introduction global system for mobile communication gsm.
Base station subsystem radio access nss plmn public land mobile network public mobile communications network pstn public switched telephone network um air interface terrestrial network gsm network. The architecture of a gsm system is shown in the figure 2. The gsm 1800 mhz pcn element was added a few years later when the uks dti was at the leading edge of telecommunications liberalisation and i propelled it to be the first credible entity to set out the vision of the personal mobile phone as a. Short message service centre smsc, voice mail system vms use standard interface towards gsm.
Pstn public switched telephone network me mobile equipment source. Core network pstn pstn pstn, packet network packet network ip network internet 8. The gsm contains most of the necessary capabilities to support packet transmission over gsm. Wireless telecommunication systems slides by jochen schiller with modifications by emmanuel agu qmarket. Originally, it operates in the 900 mhz band, but subsequently the 1. Since msc is basically a pstn isdn switch its bitrate is still 64 kbps. Telecommunications network and service architectures. The mscs of the gsm network interface with the pstn network to enable communication between mobile and fixed terminals. Pstn public switched telephone network pspdn packet switched public data net. Gsm and in architecture tietoverkkolaboratorio tkk.
An explanation of gsm and how it works will help understand the way my project works. A gsm architecture is a complex structure to understand. Gsmplmn transit network pstn, isdn source destination network te te bearer services. Databases hlr home location register vlr visitor location register eir equipment identity register network subsystem msc msc fixed partner networks iwf isdn pstn pspdn cspd n s s 7 eir hlr vlr isdn pstn. Cellular networks khoury college of computer sciences. Architecture of the gsm system gsm is a plmn public land mobile network several providers setup mobile networks following the gsm standard within each country gsm system comprises 3 subsystems rss radio subsystem. When the fcc issued 1900 mhz to pcs in the united states it was based on gsm. Microsoft teams it architecture and telephony solutions. There are 6 basic components that formed the system architecture of gsm. Gsm architecture numbering and routing gsm services.
Wattenhofer 914 architecture of the gsm system gsm is a plmn public land mobile network several providers setup mobile networks following the gsm standard within each country components. Given below is a simple pictorial view of the gsm architecture. Find, read and cite all the research you need on researchgate. Scribd is the worlds largest social reading and publishing site. The chapter discusses gsm frequency bands, the gsm public land mobile network plmn and its objectives and services, gsm architecture and gsm subsystem entities, interfaces, and protocols between gsm. Gsm,pdc gprs, edge wcdma, cdma2000 single standard bandwidth 1. As for pstn, it consists of a switching plane where mobile switching centers mscs may be found. Gsm operates on the 900 mhz, 1800 mhz and 1900 mhz. It is made of many small units working in a harmonious way. The network operator observes and maintains network quality and service offered through the nms. It controls calls to and from other telephone and data communications networks, including the public switched telephone networks pstn, integrated services digital networks isdn, public land mobile networks plmn and public data networks. Gsm adjunct systems gsm standards define that certain adjunct or secondary systems work with gsm technology. The mobile station ms the base station subsystem bss the network switching subsystem nss the operation support subsystem oss given below is a simple pictorial view of the gsm architecture. Microsoft supports several options as you begin your journey to teams in the microsoft cloud.
Umts system architecture ue me mobile equipment is the single or multimode terminal used for radio communication usim umts subscriber identity module is a smart card that holds the subscriber identity, subscribed services, authentication and encryption keys utran node b equivalent to bts in gsmgprs. The public switched telephone network is a global system that has developed over several decades. Evolutionary analysis of gsm, umts and lte mobile network. The gateway msc or gmsc the purpose of which is to query the hlr and determine the location of the subscriber. Gsm system architecture bts bts bts bts bts bsc bsc msc hlr vlr auc pstn isdn ms telcom 2700 11 bts omc data networks operation support subsystem radio station subsystem network switching subsystem public networks ms functional architecture radio subsystem rss base station subsystem bss network and switching subsystem nss operation. History developed by group speciale mobile founded 1982 which was an initiative of cept conference of european post and telecommunication under etsi, gsm is named as global system for mobile communication in 1989 full set of specifications phasei became available in 1990 phase 2 of the gsm specifications occurs. A public switched telephone network is a combination of telephone networks used worldwide, including telephone lines, fiber optic cables, switching centers, cellular networks, satellites and cable systems. Gsm system architecture bts bts bts bts bts bts bsc bsc omc msc hlr vlr auc pstn isdn data networks operation support subsystem radio station subsystem network switching subsystem public networks ms ms telcom 2700 9 functional architecture radio subsystem rss base station subsystem bss network and switching subsystem nss operation. Evolution types evolution contains not only technical evolution but also expansion to network. Gsm owns a market share of more than 70 percent of the worlds digital cellular subscribers. In this paper we will use network analysis to study the pstn. From the early research of alexander graham bell, telecommunications companies evolved the pstn architecture that provided for yesterdays landline voice communications. The nss is the core component of the gsm architecture which is responsible for call switching, end to end calls, mobility management of subscribers and communication with other networks such as.
The nss is the core component of the gsm architecture which is responsible for call switching, end to end calls, mobility management of subscribers and communication with other networks such as pstn and isdn. I am not going to tell you the differences, look them up on your own. This poster helps you decide which microsoft telephony solution phone system in the cloud or enterprise voice onpremises is right for users in your organization, and how your organization can connect to the public switched telephone network pstn. Gsm operates on the mobile communication bands 900 mhz and 1800 mhz in most parts of the world. Volume 1 sr on public automatic telephone communication. Gsm explain gsm architecture with a neat block diagram. A gsm modem is a device which can be either a mobile phone or a modem device which can be used to make a computer or any other processor communicate over a network. Pstn mobile switching center data communication network bts base transceiver station auc authentication center omc operation and maintenance center pstn public switched telephone network me mobile equipment source. Gsm uses digital communication system or dcs 1800 and is the worlds main 2g standard. Section 1 gsm architecture overview the imsi identifies the subscriber within the gsm network while the ms isdn is the actual telephone number a caller possibly in another network uses to reach that person. Outline of the lecture evolutions form gsm to umts. Gsm network architecture, channelisation, signalling and call.
It is a standard initially created to solve the incompatibility of the 1g cellular systems and equipments in europe. Connection originating or terminating from external telephone pstn are handled by a dedicated gateway gateway mobile switching center gmsc. The msc provides the link between gsm network and the pstn public switched telephone network. Global system for mobile communication gsm definition global system for mobile communication gsm is a globally accepted standard for digital cellular communication. Public switched telephone networks mit opencourseware. Early realization of necessary basic research on ilities figure by mit ocw. Gsm is the short form of global system for mobile communications. Using underground copper wires, this legacy platform has provided businesses and households alike with a reliable means to communicate with anyone around the world for. Nov 19, 2018 pstn stands for public switched telephone network, or the traditional circuitswitched telephone network. Gsm is the name of a standardization group established in 1982 to create a common european mobile telephone standard.
The gsm architecture consists of three major interconnected subsystems that interact with themselves and with users through certain network interface. A gsm modem requires a sim card to be operated and operates over a network range subscribed by the network operator. Gsm case study is part of a series of telecommunication case studies produced under the new initiatives program of the office of the secretary general of. Global system for mobile gsm university of pittsburgh. The network architecture for gsm edge was basically the same as. Volume 2 sr on the future norms on the pstn channels.
These functions and interfaces are explained in this chapter. In order that the gsm system operates together as a complete system, the overall network architecture brings together a series of data network identities, each with several elements. Gsm is a cellular network that provides a voice, sms service and other additional services like emergency calls the gsm goal was to support services similar to pstn services and. Global system for mobile communication gsm is a globally accepted standard for digital cellular communication. Overview of the gsm system and protocol architecture. The gsm system can be separated into three extensive divisions. In the us, gsm operates in the bands 850 mhz and 1900 mhz. Bss nss bts bsc um a ms mscvlr gmsc hlrauceir trau isdn pstn pspdn cspdn network management nms v a s. Architecture of the gsm system several providers setup mobile networks following the gsm standard within each country components oms mobile station obs base station omsc mobile switching center olr location register subsystems orss radio subsystem.
Muhammad faisal 4 department of computer science, b acha khan university. Since the gsm network is a voice network, ss7 is used for the transport of signaling information between bssutran and nss and. It can be connected to a computer through serial, usb or. To better understand the gsm architecture, divide all the units in four categories. Gsm is the name of a standardization group established in 1982 to create a common european mobile telephone standard that would formulate specifications for a.
This basic tutorial on gsm architecture also covers gsm burst types, gsm frame structure, gsm channels, gsm physical layer and so on. Architecture and working of gsm module with circuit. Architecture, security and future challenges ihtesham ul haq 1, zia ur rah man 2, shahid ali 3, engr. The subsystems are base station subsystem bss, network switching subsystem nss and operational support subsystem oss. The gsm network architecture wireless communication. Cellular concept several small cells instead of a single transmitter frequency reuse. G s m 2g bas ic n e twork arch ite ctu re internet gprs tcpip 2g sgsn ps core ggsn gsm mobile bss srri base station subsystem cs core bsc t gsm bts c gsm s msci hlr mobile m mobile indoor 2g bts plmnpstnisdn in scp huawei technologies co. Signaling this applies to interfaces with the bss and pstn. It looks similar to pstn but supports an additional service called terminal mobility. A pstn lets users make landline telephone calls to one another. Gsm case study 2 this case has been prepared by audrey selian, itu. A simplified view of the gsm edge network architecture can be seen in the diagram below. The gsm network architecture is defined in the gsm specifications and it can be grouped into four main areas.
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