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Transcript of Wireless Networking Trends - Aalborg dsp/livslanglaering/HPS-LLL05_Session1.pdf · PDF...

  • Page 1 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    Wireless Networking Trends – Architectures, Protocols & optimizations for future networking scenarios

    H. Fathi, J. Figueiras, F. Fitzek, T. Madsen, R. Olsen, P. Popovski, HP Schwefel

    • Session 1 Network Evolution & Mobility Support (HPS)

    • Session 2 Ad-hoc networking (TKM/FF)

    • Session 3 Enabling technologies for ad-hoc NWs (TKM/FF)

    • Session 4 Wireless Sensor Networks (PP)

    • Session 5 Performance aspects & optimizations (HF/TKM)

    • Session 6 Context-sensitive Networking (RLO/JF)

    Note: Slide-set contains more material than covered in the lecture!

    Page 2 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    Wired / Wireless network Computer/Communication

    Convergence is the key challenge

  • Page 3 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    A ntennas &

    Propagation

    Patrick Eggers

    Center for Teleinfrastructure (CTIF) Director: Ramjee Prasad,

    Co-directors: Ole Brun Madsen and Peter Koch

    C ellular

    System s

    Preben Mogensen

    D igital

    C om

    m unications

    Bernard Fleury

    R F Integrated

    System s and

    C ircuits

    Torben Larsen

    W ireless

    N etw

    orks &

    Em bedded

    System s

    Ramjee Prasad

    Speech and M

    ultim edia

    C om

    m unications

    Børge Lindberg

    W ireless

    Perspective

    Bent Dalum

    A alborg U

    niversity SPA

    C E C

    enter

    Jens F.D. Nielsen

    C enter for

    N etw

    ork Planning

    Ole Brun Madsen

    W ireless

    C om

    puting and Security

    Henrik Larsen

    Page 4 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    WING: Research projects (selection) Selected research projects with relevance for this course/course lecturers • Center for Network and Service Convergence – CNTK

    – Danish Research Council, with local industry partners – Real-time service provisioning, traffic & performance modeling, network optimization – WING Researchers: Hanane Fathi, Tatiana K. Madsen

    • Wireless Access Networks, Devices, and Applications – WANDA – Danish Research Council, with local industry partners – Localization & location-based network optimization – WING Researchers: Joao Figueiras

    • My Adaptive Global NETwork – MAGNET – EU funded, with 36 European partners – Personal Networks, context-sensitive networking – WING Researchers: Rasmus Olsen (and more)

    • HIghly DEpendable ip-based NETworks and Services – HIDENETS – EU funded, with 9 European partners – End-to-end dependability solutions for car-to-car communication with infrastructure service

    access And many more ...

  • Page 5 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    Content 1. Introduction/Motivation

    • Cellular Concepts, Layering Models 2. Cellular Network Evolution

    • GSM, GPRS, UMTS: Architecture, air interface, and protocols

    • IP connectivity and IP transport 3. IP-based multimedia subsystem (IMS)

    • Session Initiation Protocol (SIP) • IMS architecture • Cross-Layer Aspects: Quality of Service and

    Security 4. Mobility support mechanisms

    • L2 mobility support, Network Layer (MIP) • Transport Layer Mobility, Session Layer

    Mobility (SIP) • Intermediate (L3.5 solution): Host Identity

    Protocol (HIP) • Mobility support on which layer?

    5. Summary and outlook • Personal Area Networks and

    Personal Networks • Heterogeneous access

    networks

    Page 6 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    Intro: Cellular systems

    • Geographic region subdivided in radio cells

    • Base Station provides radio connectivity to Mobile Station within cell

    • Handover to neighbouring base station when necessary

    • Base Stations connected by some networking infrastructure

  • Page 7 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    Extended layered communication model • Ultimate goal of (wireless)

    service provisioning: user satisfaction

    • Focus in this course: network aspects, i.e. Layers 2-5

    Functionalities, that are difficult to assign to single layers:

    • Mobility support • Quality of service support • Security (authentication, etc.) • Dependability/Resilience ... More later in this session

    L3: Network Layer: IP

    L2: MAC/LLC

    L4: Transport: TCP, UDP, RTP/UDP

    Application

    (L5) Session Control, e.g. SIP Middleware

    User Interface

    User

    L1: PHYS

    User Environment

    N etw

    ork Q oS

    A pplication Q

    oS

    U ser perceived Q

    oS

    Page 8 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    Wireless Communication Technologies

    20 155

    Indoor

    Pedestrian

    High Speed Vehicular

    Rural

    Mobility & Range

    Personal Area

    Vehicular Urban

    0.5 2

    UMTS

    G SM

    DECT

    Fixed urban

    Total data rate per cell 10

    WLAN/ BRAN

    B-PANWPANBluetooth

    1000 Mb/s

    Different Requirements on Wireless Communication: •Range, Mobility Support

    •Throughput (interference/medium sharing), availability/reliability, QoS support

    •Scalability/Number of Nodes

    •Power consumption

    •Cost, simplicity

    •Voice / data support

    •Security

  • Page 9 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    Cellular systems: technologies & subscribers

    0

    200

    400

    600

    800

    1000

    1200

    1996 1997 1998 1999 2000 2001 2002 year

    Su bs

    cr ib

    er s

    [m ill

    io n] GSM total

    TDMA total CDMA total PDC total Analogue total Total wireless Prediction (1998)

    Page 10 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    Content 1. Introduction/Motivation

    • Cellular Concepts, Layering Models 2. Cellular Network Evolution

    • GSM, GPRS, UMTS: Architecture, air interface, and protocols

    • IP connectivity and IP transport 3. IP-based multimedia subsystem (IMS)

    • Session Initiation Protocol (SIP) • IMS architecture • Cross-Layer Aspects: Quality of Service and

    Security 4. Mobility support mechanisms

    • L2 mobility support, Network Layer (MIP) • Transport Layer Mobility, Session Layer

    Mobility (SIP) • Intermediate (L3.5 solution): Host Identity

    Protocol (HIP) • Mobility support on which layer?

    5. Summary and outlook • Personal Area Networks and

    Personal Networks • Heterogeneous access

    networks

  • Page 11 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    GSM: Global System for Mobile Communication

    • 2nd Generation of Mobile Telephony Networks • 1982: Groupe Spèciale Mobile (GSM) founded • 1987: First Standards defined • 1991: Global System for Mobile Communication,

    Standardisation by ETSI (European Telecommunications Standardisation Institute) - First European Standard

    • 1995: Fully in Operation

    • Deployed in more than 184 countries in Asia, Africa, Europe, Australia, America)

    • more than 747 million subscribers • more than 70% of all digital mobile phones use GSM • over 10 billion SMS per month in Germany, > 360 billion/year

    worldwide

    History:

    Today:

    Page 12 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    GSM – Architecture

    Components: • BTS: Base Transceiver Station • BSC: Base Station Controller • MSC: Mobile Switching Center • HLR/VLR: Home/Visitor Location

    Register • AuC: Authentication Center • EIR: Equipment Identity Register • OMC: Operation and

    Maintenance Center

    Transmission: • Circuit switched transfer • Radio link capacity: 9.6 kb/s

    (FDMA/TDMA) • Duration based charging

    BSC

    BSC

    MS

    BTS

    BTS

    BTS

    MS

    MS

    MSC

    HLR

    VLR

    OMC

    EIR

    AuC

    O

    Abis AUm

    Radio Link

    Base Station Subsystem

    Network and Switchung Subsystem

    Operation Subsystem

    Connection to ISDN, PDN PSTN

    Radio Subsystem (RSS)

  • Page 13 Hans Peter SchwefelLife-long learning, Aalborg University, Aug. 2005

    GSM Services ‘Traditional’ voice services

    – voice telephony primary goal of GSM was to enable mobile telephony offering the traditional bandwidth of 3.1 kHz

    – emergency number common number throughout Europe (112); mandatory for all service providers; free of charge; connection with the highest priority (preemption of other connections possible)

    – Multi-numbering several ISDN phone numbers per user possible

    – voice mailbox (implemented in the fixed network supporting the mobile terminals) – Supplementary services, e.g.: identification, call forwarding, number suppression,

    conferencing

    ‘Non-Voice’ Services (examples) • Fax Transmissions • electronic ma