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                           <rdf:li><rdf:Description xmpDM:name="Architecture of the GSM system GSM is a PLMN (Public Land Mobile Network) several providers setup mobile networks following the" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="GSM standard within each country components MS (mobile station) BS (base station) MSC (mobile switching center) LR (location register) subsystems" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="RSS (radio subsystem): covers all radio aspects NSS (network and switching subsystem): call forwarding, handover, switching OSS (operation subsystem): management" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="of the network Prof." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Ingredients 1: Mobile Phones, Smartphones &amp; Co." xmpDM:startTime="101367" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Prof." xmpDM:startTime="101367" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="101367" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="101367" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="101367" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications The visible but smallest part of the network! 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xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Radio subsystem The Radio Subsystem (RSS) comprises the cellular mobile network up to the switching centers Components Base Station Subsystem" xmpDM:startTime="1103733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(BSS): Base Transceiver Station (BTS): radio components including sender, receiver, antenna - if directed antennas are used one BTS can" xmpDM:startTime="1103733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="cover several cells Base Station Controller (BSC): switching between BTSs, controlling BTSs, managing of network resources, mapping of radio channels" xmpDM:startTime="1103733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(Um) onto terrestrial channels (A interface) BSS = BSC + sum(BTS) + interconnection Mobile Stations (MS) Prof." xmpDM:startTime="1103733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="1103733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1103733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1103733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="1103733" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="GSM: cellular network use of several carrier frequencies not the same frequency in adjoining cells cell sizes vary from some" xmpDM:startTime="1280300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="100 m up to 35 km depending on user density, geography, transceiver power etc." xmpDM:startTime="1280300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="hexagonal shape of cells is idealized (cells overlap, shapes depend on geography) if a mobile user changes cells handover of" xmpDM:startTime="1280300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="the connection to the neighbor cell Prof." xmpDM:startTime="1280300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="1280300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1280300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1280300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications possible radio coverage of the cell idealized shape of the cell cell segmentation of the area into cells" xmpDM:startTime="1280300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="1280300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="GSM frequency bands (examples) Type Channels Uplink [MHz] Downlink [MHz] GSM 850 128-251 824-849 869-894 GSM 900 classical extended 0-124," xmpDM:startTime="1449500" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="955-1023 124 channels +49 channels 876-915 890-915 880-915 921-960 935-960 925-960 GSM 1800 512-885 1710-1785 1805-1880 GSM 1900 512-810 1850-1910" xmpDM:startTime="1449500" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="1930-1990 GSM-R exclusive 955-1024, 0-124 69 channels 876-915 876-880 921-960 921-925 Prof." xmpDM:startTime="1449500" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="1449500" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1449500" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1449500" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications Additionally: GSM 400 (also named GSM 450 or GSM 480 at 450-458/460-468 or 479-486/489-496 MHz) Please note: frequency" xmpDM:startTime="1449500" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="ranges may vary depending on the country! 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several BSC can belong to a MSC Databases (important: scalability, high capacity," xmpDM:startTime="2310200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="low delay) Home Location Register (HLR) central master database containing user data, permanent and semi-permanent data of all subscribers assigned" xmpDM:startTime="2310200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="to the HLR (one provider can have several HLRs) Visitor Location Register (VLR) local database for a subset of user" xmpDM:startTime="2310200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="data, including data about all user currently in the domain of the VLR Prof." xmpDM:startTime="2310200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="2310200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="2310200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="2310200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="2310200" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Services Switching Center The MSC (mobile services switching center) plays a central role in GSM switching functions additional functions" xmpDM:startTime="2508667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="for mobility support management of network resources interworking functions via Gateway MSC (GMSC) integration of several databases Functions of an" xmpDM:startTime="2508667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="MSC specific functions for paging and call forwarding termination of SS7 (signaling system no." xmpDM:startTime="2508667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="7) mobility specific signaling location registration and forwarding of location information provision of new services (fax, data calls) support of" xmpDM:startTime="2508667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="short message service (SMS) generation and forwarding of accounting and billing information Prof." xmpDM:startTime="2508667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="2508667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="2508667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="2508667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="2508667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Operation subsystem The OSS (Operation Subsystem) enables centralized operation, management, and maintenance of all GSM subsystems Components Authentication Center (AUC)" xmpDM:startTime="2582300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="generates user specific authentication parameters on request of a VLR authentication parameters used for authentication of mobile terminals and encryption" xmpDM:startTime="2582300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="of user data on the air interface within the GSM system Equipment Identity Register (EIR) registers GSM mobile stations and" xmpDM:startTime="2582300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="user rights stolen or malfunctioning mobile stations can be locked and sometimes even localized Operation and Maintenance Center (OMC) different" xmpDM:startTime="2582300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="control capabilities for the radio subsystem and the network subsystem Prof." xmpDM:startTime="2582300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="2582300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="2582300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="2582300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="2582300" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Questions &amp; Tasks You should be able to draw the architecture of the classical GSM system and to describe the" xmpDM:startTime="2699167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="functionality of the components! What are the advantages of specifying not only the radio interface but also all internal interfaces" xmpDM:startTime="2699167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="of the GSM system? Could there be a single point of failure in the GSM architecture? How to avoid it?" xmpDM:startTime="2699167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="In which database is a roaming tourist registered? How could the system block all stolen GSM phones? How can the" xmpDM:startTime="2699167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="system localizes mobile phones (at least to a certain precision…)? Why does GSM separate the MS and SIM? What is" xmpDM:startTime="2699167" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="the advantage/disadvantage of an eSIM? 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Tasks" xmpDM:startTime="2699167" tscDM:image="C04-Wireless_Telecommunication_Systems-3_Thumbnails.png" tscDM:imageindex="19" tscDM:imageoffset="0" tscDM:imagerect="1425, 0, 75, 42"/></rdf:li></rdf:Seq>
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