Budapest University of Technology and Economics, Faculty of Electrical Engineering and Informatics

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    Mobile Communication Systems

    A tantárgy neve magyarul / Name of the subject in Hungarian: Mobil kommunikációs rendszerek

    Last updated: 2015. december 1.

    Budapest University of Technology and Economics
    Faculty of Electrical Engineering and Informatics     		Electrical Engineering
    Infocommunication Systems specialization
    Course ID Semester Assessment Credit Tantárgyfélév
    VIHIAC04 5 2/1/0/v 4  
    3. Course coordinator and department Dr. Szabó Sándor,
    4. Instructors Dr. Péter Fazekas        HIT
    Dr. Gábor Jeney        HIT
    5. Required knowledge Infocommunications; Informatics 2.
    6. Pre-requisites
    Kötelező:
    (Szakirany("AVINmultimed", _) VAGY
    Szakirany("AVINinfokomm", _) VAGY
    Szakirany("AVINnagyfr", _) )VAGY
    Szakirany("VIABV-INFSYS", _)

    A fenti forma a Neptun sajátja, ezen technikai okokból nem változtattunk.

    A kötelező előtanulmányi rend az adott szak honlapján és képzési programjában található.

    Ajánlott:
    Infocommunications; Informatics 2.
    7. Objectives, learning outcomes and obtained knowledge The main objective of this course is to teach the operation and technical paradigms of today’s modern mobile and wireless communication systems. Focus is on the prectical issues interesting for electrical engineers, such as: processes and basic operation of radio interfaces, hardware components and architecture of networking equipments. We also put emphasis on the practical implementation and the application of these in real products.
    8. Synopsis Introduction, basics of mobile networks:
    •    motivations, informations about the specialization, logical architecture of the specialization, interdependencies among subjects
    •    broader context of mobile networking as a profession: national and global data regarding this profession: estimate of number of enterprises, number of employees , gross income, share from GDP and short term forecast of these
    •    overview of the contents of this semester, explanation of the logical structure of this subject
    •    general architecture of mobile networks, paradigm of frequency reuse, cellular theorem
    •    logical and physical mobile network topologies, examplified through real networks
    Basic mobile and wireless principles
    •    problems of user mobility, draft solutions
    •    basic concepts of wireless transmission at the level of introduction/refreshment of previously learned: complex representation of baseband signal, bandwidth, carrier frequency, noise/interference, Shannon capacity, attenuation, fading, modulation, intermediate frequency, up/downconversion, filtering, digital filtering, error correction coding, amplification, etc.
    GSM system
    •    architecture of the network, roles of network elements, logical and protocol architecture
    •    developed versions of GSM architecture (based on packet switching)
    •    practical implementations, possible configurations, special vendor solutions
    GSM radio interface
    •    basics of GSM radio: time and frequency division, frame structure, logical channels
    •    GSM rádiós interfész alapvető működése: idő- és frekvenciaosztás, keretszerkezet, logikai csatornák
    •    details:
    o    strucure and elements of GSM base stationsGSM bázisállomás felépítése, elemei -> from early equipment
    o    -> to modern base stations ( SDR based base station, multi-standard base station)
    o    functions explained in the modern base station architecture: protokoll, baseband, RF
    o    some concrete examples and development systems
    o    explanation of concrete GSM processes at element level
        coding, modulation, interleaving, burst-assembling, frequency hopping
        applied signel processing methods
    •    packed switched GPRS, EDGE interface
    3G
    •    architecture of 3G networks, role and operation of network equipments
    •    operation of 3G radio interface: new paradigm of spread spectrum communications
    o    general description and types of spread spectrum systems
    o    code division in 3G: application of orthogonal and scrambling codes
    o    operation of 3G radio interface: modulation, coding, physical signal processing, channels, logical channels, transport channels, slot and frame structure, available bitrates
    3G, 3G developed networks:
    •    new paradigm: QoS on the radio interface
    o    3G QoS, QoS classes, relation of end to end QoS and radio QoS, radio scheduling methods for QoS
    •    further developments of 3G: HSDPA, HSUPA, HSPA+: methods for increased bitrate, new radio solutions:
    o    application of AMC, QoS, scheduling
    •    development of 3G functional architecture and equipment
    o    RNC emulation, multi-standard base station platforms, etc.
    •    new radio paradigm: MIMO
    o    basics of MIMO and its application methods
    o    introduced through the use and MIMO parameters in HSPA
    LTE system
    •    LTE network: new equipment, their architecture and operation, LTE network interfaces
    •    Interworking between LTE and legacy systems. Application of earlier special or vendor specific solutions in LTE.
    •    Novelties in the radio network: application of Remote Radio Units. CPRI interface, OBSAI architecture.
    LTE rádio interface
    •    Overview: FDM, OFDMA basics (in details: other subject of the specialization).
    o    introduced through LTE radio interface parameters, uplink and downlink direction
    •    AMC, scheduling, QoS, MIMO in LTE
    LTE-Advanced: the real 4G
    •    new paradigm: carrier aggregation
    o    implementation on base station hardware, signal processing challenges, hardware limits
    o    recall: dual-cell HSPA within 3G developments
    •    new MIMO modes and their effect
    •    relay modes and their performance
    Outlook: Energy efficiency in mobile networks, through LTE/LTE-Advanced example
    •    actual data about consumption of mobile networks
    o    power consumption model of mobile base station and base station site
    •    energy efficiency metrics of mobile networks
    •    methods for reducing consumption
    Local networks: 802.11 standards (WiFi)
    •    overview of the standards: what the lettes mean, what is the scope of these standards
    •    802.11 b,g,a,n,ac -> charachterisation of the physical transmission
    o    fraquency band, modulation, coding, signal processing, available rates
    Local networks: Bluetooth
    o    Operations of Bluetooth radio interface: modulation, frame structure, frequency-hopping, network management
    o    differences in Bluetooth versions
    o    available bitrates
    Personal area networks
    •    Vimedia (“wireless USB”)
    o    multi-band OFDM, basics, relations to formerly studied systems
    o    physical parameters: bands, modulation, coding, bitrates
    o    available development environments
    •    RFID
    o    basic operation, application of RFID, possibilities, basic operational principles
    o    available development environments
    •    NFC
    o    basics of operation, possible use cases, bitrates
    o    development environments
    o    
    Development of custom radio transmission
    •    USRP introduction
    o    USRP architecture, in light of formerly mentioned base station architectures
    •    open source libraries, some example developments
    Special networks in industrial environments
    •    industrial networks, on-board vehicular networks
    o    main differences in contrast with user networks, from networking and wireless perspective
    •    basic principles of some quasi standards or vendor specific solutions (wired and wireless):
    o    industrial Ethernet, Siemens WirelessHART, Interface Wireless RAD
    •    how solutions discussed in these lectures are applied in special industrial solutions
    Mobile/wireless networks of the near future (detailed contents refreshed yearly)
    •    5G networks
    o    increase of traffic, capacity cube, means of serving this
    o    “Internet of Things” special traffic and user requirements:machine to machine communications, massive number of terminals (sensor networks), requirements of these, their effect on wireless networks
    o    massive MIMO systems; coordinated multipoint; opportunities and constraints
    o    filter banks, ultra-wideband communications, current developments
    •    attocell networks, use of higher bands: 60 GHz, 120 GHz; visible light based communication systems: LiFi
    •    cloud based radio access networks (cloud-RAN)
    •    kvantum communications: possibilities and current developments

    9. Method of instruction lecture and prectice
    10. Assessment •    1 midterm exam during the semester
    •    Exam period: written exam
    •    Pre-exam: yes

    11. Recaps Midterm exam can be repeated during the semester. One more opportunity for writing the midterm in the first week after the semester.
    12. Consultations On-demand group consultations in pre-arranged occasions.
    13. References, textbooks and resources Electronic material for the lectures made available through web portal. This is
    •    drafts for all lectures and practices
    •    relevant overview papers for given topics

    14. Required learning hours and assignment
    Kontakt óra56
    Félévközi készülés órákra0
    Felkészülés zárthelyire24
    Házi feladat elkészítése0
    Kijelölt írásos tananyag elsajátítása0
    Vizsgafelkészülés40
    Összesen120
    15. Syllabus prepared by Dr. Péter Fazekas        HIT