Cellular Communication Systems (previously UMTS Networks) Graduate course in Computer Science Integrated Communication Systems (ICS) Group http://www.tu-ilmenau.de/ics -> Teaching -> Master studies -> Cellular Communication Systems Winter Semester Andreas Mitschele-Thiel, Jens Mückenheim (lecturers) Mehdi Harounabadi (seminars)
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Cellular Communication Systems (previously UMTS Networks) Graduate course in Computer Science Integrated Communication Systems (ICS) Group http://www.tu-ilmenau.de/ics -> Teaching -> Master studies -> Cellular Communication Systems Winter Semester
Andreas Mitschele-Thiel, Jens Mückenheim (lecturers)
Cellular Communication Systems 5 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
Course Contents
• Review of the basics of mobile communications • Overview on GSM, GPRS and EDGE • UMTS (3G) networks, including
- network architecture, - network elements, - protocols and - service aspects
• Architecture, protocols and services of UMTS networks especially - the radio access network and - the core network
• Evolution towards LTE and LTE-Advanced - High-speed Packet Data (HSPA), - Long-term Evolution (LTE) and System Architecture Evolution (SAE) - Self-organization in LTE and LTE-Advanced
Focus on network aspects rather than radio details
Cellular Communication Systems 6 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
Course Objectives
Understand how mobile networks work
Be able to navigate and understand UMTS and LTE standards
Understand why UMTS and LTE has been defined the way it is
Understand the 2G to 4G evolution path
=> Acquire a reasonable deep understanding of a highly complex
system
=> Understanding of the system from the system architect´s view
or: abstract from the details and understand the story as a whole
Cellular Communication Systems 7 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
Working Method
Study of real Telco systems with their specific problems
Identify and solve the identified problems instead of a general study of abstract problems
Lots of discussion (hopefully)
Individual studies and teamwork Individual topics, but coordination in groups Term paper due January 27, 2016 Final presentations: February 1-5, 2016 Note: plagirism will result in fail for the course!
Exam Oral exam (20 min, please register at ICS office in Z1031) Grading scheme: 60% oral exam, 40% term paper plus presentation
4.0 required for each part to pass the course 50% correct answers required to pass oral exam (4 topics typically)
Cellular Communication Systems 8 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
Organisational Stuff
Lecture: first half of semester (4 hrs per week) Individual studies: second half of semester (term paper and presentations) Course prerequisites:
Basics of Communication Systems and Protocols (mandatory) Basics of Mobile Communication Networks, e.g. Advanced Mobile
Communication Networks course (recommended) Slides and additional information are provided at http://www.tu-ilmenau.de/ics
-> Teaching -> Master Studies -> Cellular Communication Systems Instructor contact: Andreas Mitschele-Thiel Jens Mückenheim Email: [email protected] Email: [email protected] Phone: 03677-69 2819/2829 Phone: 03461-462107
Cellular Communication Systems 14 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
Services: - Traditional Voice - Teleservices like and Fax, SMS, MMS messaging - Wide-band Data for Multimedia and Wireless Internet: via dedicated access (Basic Release99) up to 144 kb/s for high speed mobiles up to 384 kb/s for low speed mobiles up to 2 Mb/s for portable/fixed users
via high-speed packet access (HSPA, Release5, 6&7) up to 7.2-14.4/28.8 Mbit/s download up to 5.7/11.5 Mbit/s upload
Spectral Efficiency: High Mobility & Roaming: Worldwide Compatibility: with 2G systems, especially GSM Physical characteristics:
Wideband (W-)CDMA system with 5MHz bandwidth, 3.84 Mchps around 2000 MHz (EU), 1900 MHz (US), 1700 MHz (Japan)
UMTS: Universal Mobile Telecommunication System
Cellular Communication Systems 15 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
Why UMTS?
GSM (2nd generation): Optimized for circuit-switched voice High delay (180 ms round-trip) Small band, inflexible assignment of
data rates Low data rates
Suboptimal use of radio resources
(spectral efficiency)
Complicated RF planning (layout of frequency usage)
Standard set by Europe
Globally available, but not planned as such
UMTS (3rd generation): Focus on packet-switched data Lower latency Flexible assignment of spectrum
with variable data rates Higher data rates for multimedia
services Higher capacity of radio system
Simplified RF engineering (no frequency planning)
Worldwide agreed standard
Worldwide roaming by design
Cellular Communication Systems 16 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
3GPP Standards Releases (summary from/links to Wikipedia, 2013)
Version Released Info Release 99 2000 Q1 Specified the first UMTS 3G networks, incorporating a CDMA air
interface Release 4 2001 Q2 Originally called the Release 2000 - added features including an all-IP
Core Network Release 5 2002 Q1 Introduced IMS and HSDPA Release 6 2004 Q4 Integrated operation with Wireless LAN networks and adds HSUPA,
MBMS, enhancements to IMS such as Push to Talk over Cellular (PoC), GAN (UMA)
Release 7 2007 Q4 Focuses on decreasing latency, QoS and improvements to real-time applications like VoIP. This specification also focuses on HSPA+ (High Speed Packet Access Evolution), SIM high-speed protocol and contactless front-end interface (Near Field Communication enabling operators to deliver contactless services like Mobile Payments), EDGE Evolution.
Release 8 2008 Q4 LTE (E-UTRA), All-IP Network (SAE). Release 8 constitutes a refactoring of UMTS as an entirely IP based fourth-generation network.
Release 9 2009 Q4 SAES Enhancements, WiMAX and LTE/UMTS Interoperability. Dual-Cell HSDPA with MIMO, Dual-Cell HSUPA.
Release 11 2012 Q3 Advanced IP Interconnection of Services. Service layer interconnection between national operators/carriers as well as third party application providers.
Cellular Communication Systems 22 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
4G Mobile Communication Systems: Radio Integration
Wireless IP
Society S-UMTS
Satellite Broadband
DVB-S DVB-T
DAB
GSM GPRS/EDGE
DECT IR
Broadband W-LAN
UMTS
Satellite/HAPS
Broadcasting
Cellular
Indoor
MBS 40 xMDS
Broadband WFA
Wireless Local Loop
Body LANs
Personal Area Networks
UMTS ++
4th Generation
Local Area Networks MBS 60 MWS
Bluetooth
Quasi-Cellular
o
Cellular Communication Systems 23 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
4G Mobile Communication Systems: Network Integration
o
Cellular Communication Systems 24 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
4G Mobile Communication Systems: System Integration
distribution layer
cellular layer
hot spot layer WLAN
DAB and / or DVB
2G: e.g. GSM
IMT-2000 UMTS
personal network layer
X X X X X X X X X X X X X fixed ( wired ) layer
• full coverage • global access • full mobility • not necessary individual links
• full coverage and hot spots
• global roaming • full mobility • individual links
• local coverage • hot spots • global roaming • local mobility • individual links
• short range communication (e.g. Bluetooth, DECT )
• global roaming • individual links • no mobility • global roaming • individual links
horizontal handover within a system vertical handover between systems
possible return channels
o
Cellular Communication Systems 25 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
Summary of the Evolution Path (European View)
1G: Analog systems
2G (GSM): global digital personal communication system
FDMA, TDMA, FDD circuit-switched voice (voice service) SMS global roaming
2G+ (GSM+GPRS): introduction of packet-switched data
IP to the terminal; ATM transport in the network multiplexing of packet-switched data on traffic channels of radio link IP tunneling in the packet-switched core network SS7 signaling, AAA, mobility management QoS: best effort still ongoing efforts
EDGE: enhanced radio efficiency (adaptive modulation) GERAN: generalized access network, to connect to 3G core networks
3G (UMTS): packet-switched data
...
Cellular Communication Systems 26 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
Summary of the Evolution Path (cont’d)
2G (GSM): global digital personal communication system
2G+ (GSM+GPRS): introduction of packet-switched data
3G (UMTS): packet-switched data CDMA-FDD/TDD predominantly data communication focus on services and content all IP transport (3GPP R4): mobile, radio access network, core network SS7 signaling: AAA, mobility management, etc. QoS support seamless service (global roaming) Enhanced packet data perfromance: HSDPA+HSUPA HSPA Common IP-based service architecture (IMS)
4G: Integration of various radio technologies (satellite, broadcast, cellular, WLAN, BAN)
use of the ‘optimal’ radio link (w.r.t. spectral efficiency, delay, throughput, error rate, emission)
IETF protocols for everything (all IP for transport and control)
Cellular Communication Systems 27 Andreas Mitschele-Thiel, Jens Mückenheim October 2013
and Services. 2nd edition, Wiley, 2005 Holma, Toskala: WCDMA for UMTS. 4th edition, Wiley, 2007 Holma, Toskala: LTE for UMTS: Evolution to LTE-Advanced, 2011 Dahlman, Parkval, Sköld: 4G: LTE/LTE-Advanced for Mobile Broadband, Elsevier, 2011 Important Documents for UMTS/HSDPA/HSUPA: 21.101 to 21.104: List of standards for Release 3 (R99), 4, 5 and 6, respectively 21.905: vocabulary for 3GPP specifications 23.002: UMTS network architecture (core network and access network entities) 23.060: GPRS architecture 25.401: UTRAN overview 25.301: Radio link protocols (UTRA) 25.931: UTRAN procedures Important Documents for LTE: 21.201: List of standards for EPS based 3GPP system (different versions for different releases) 23.401: GPRS enhancements for E-UTRAN 36.401: E-UTRAN Architecture description 36.300: E-UTRA & E-UTRAN 36.201: PHY general description 36.321: MAC 36.322: RLC 36.323: PDCP 36.331: RRC (all documents are available at www.3gpp.org)