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UNIK4700/9700-Introduction

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Other info

• Google Community UNIK4700: https://plus.google.com/communities/107897964181233758835?cfem=1
• Search for literature
• Streaming at http://lux.unik.no/unik4700-jn/unik-20140829.wmv
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• 29Aug2014 Lecture Notes: Media:20140829UNIK4700.pdf
• 2013 Lecture Notes: Media:UNIK4700-l1-h13.pdf

Slide Show

Title

UNIK4700 Introduction

Author

Josef Noll

Footer

UNIK4700/9700-Introduction

Subfooter

UNIK4700

⌘ Overview UNIK4700, UNIK9700

Radio and Mobility

• first lecture
• sign up to cwi.unik.no Signup
  • confirm your email
  • add yourself to UNIK4700H14Participants
• what do you expect
  • discuss
  • tell

Goal of the course,

• what to achieve
• how to achieve it

Examen

• • what to I expect

⌘Meeting calendar

• will be published through this wiki: http://cwi.unik.no/wiki/UNIK4700
• see also lectures from earlier years

based on

• your topics
• the goal we want to achieve

⌘ What to achieve

Academic work

• how we build up list of references
• modelling approach
• detailed list of topic (next slide)

⌘Examen

• Presentation of research topic (mandatory), home work on comparison of selected topics (60 %) and simulation work (40 %).
• The student may ask for an oral exam in which case the home work on comparison of selected topics counts 50%, the simulation work 30% and the oral exam 20%.

Mandatory

• knowledge of presentation material - "how you presented"
• presentation and analysis of 3-4 papers
• programming of user, context....

⌘Evaluation/Grade

Expectations for your presentation

• Define what to present
• Present it such that your colleagues can understand
• Facts/Reference-based presentation
• Evaluate your own work
• Checklist
  • relevant for the course
  • understandable
  • your own evaluation
  • scientific: "Don't guess, present references"

Character, Exam

For your own presentation

• focus, focus, focus - be aware of what you want to present, and what not
• make sure the others will understand what you present
• come up with challenges/unsolved issues/your expectation towards that technology

not basis for grade are

• questions during lectures

Alternativer

• evtl "mini-eksamen" i slutten av hver time, spørsmål om spesielle områder

⌘ Goals Radio

• Understand that "radio is not just another IP connection"
• Set-up a good course
• Involve you in giving the course

Radio

• get a basic understanding of radio communication
• can explain the characteristics of radio propagation
• get a feeling for wave propagation and the attenuation

⌘Goals Mobility

• identify the factors for mobility management
• know the characteristics of current mobility schemes
• address topics in current research

Mandatory

• knowledge of presentation material
• presentation and analysis of 3-4 papers
• simulation

Evaluation (draft)

• presentation of topics (own work)
• simulation results
• optional: (final exam)

⌘ Assigned topics

List of assignments UNIK4700:Assignments

Disclaimer: This compendium provides information on aspects of radio wave propagation, antennas, system aspects, and handover schemes for mobile and wireless systems. The compendium is foreseen for the UNIK4700 course on Building Mobile and Wireless Networks, and is kept on the system aspects level. UNIK has several courses on Radio and Network technologies as part of the Wireless Networks and Security (WNaS) research area.

UNIK 4700 Building Mobile and Wireless Networks

⌘ History and Future

• History of wireless communications
• Maxwell, Hertz, Marconi and other pioneers
• 1G, 2G ... 5G networks
• Frequencies and Standards
• Future Challenges

⌘ TOC - Basics of Communication

• Electromagnetic Signals
• Radio Communication Principles
• Digital communication: Nyquist, Signal/Noise Ratio
• Signal strength and Capacity: Shannon

⌘TOC - Antennas and Propagation

• Free Space Propagation
• Antennas, Gain, Radiation Pattern
• Multipath Propagation, Reflection, Diffraction
• Attenuation, Scattering
• Interference and Fading (Rayleigh, Rician, …)
• Mobile Communication dependencies

What have we learned?

• antenna characteristics and gain
• what happens if I double the frequency (900 - 1800 - 2400 MHz)?
• minimum GSM receiver sensitivity
• typical receiver power at 900 MHz (GSM channel sounder - rural)
• typical received power at 1800 MHz (GSM channel sounder - rural)
• difference City - rural - indoor
• principal operation of MIMO

⌘TOC - Propagation models

• Environments (indoor, outdoor to indoor, vehicular)
• Outdoor (Lee, Okumura, Hata, COST231 models)
• Indoor (One-slope, multiwall, linear attenuation)

⌘TOC System Comparison

• Proximity: RFID, NFC
• Short Range: ZigBee, Bluetooth, ANT+,...
• WLAN/Wifi/802.11...
• Mobile: GSM, UMTS, IMT-A (WiMAX, LTE)

⌘TOC - Mobility

• Mobile Network mobility
• IP mobility

⌘TOC - Network Building

• Future Networks: Heterogeneity, Basic Internet, Video Distribution Networks
• Coverage simulations
• Traffic simulations
• Network Capacity simulations

⌘The five myths of wireless

1. Wi-Fi is faster than Ethernet. While the raw data rate of Wi-Fi (11 Mbps) may be faster than the original Ethernet (10 Mbps), Wi-Fi's throughput efficiency is always less. Why?
2. The longer the transmission range, the better. That may be true for some wireless communications, but for wireless LANs, a greater transmission range often results in more users per cell and lower per-user throughput. Why?
3. Wireless networks can be dangerous to your health. Almost all wireless LANs have radio output levels of less than 100 milliwatts (20 dBm). Is output power the real measure?
4. 802.11g will make 802.11a obsolete. Lots of people think that 802.11g will kill 802.11a because it offers the same data rate as 802.11a (54 Mbps) plus backward compatibility with 802.11b. Other factors?
5. Wireless LANs are inherently insecure. Yes, there are security issues with the original 802.11b specification, but there are plenty of ways, including the use of VPNs and security gateways, to make wireless as secure as wired. True?

Note: 802.11 is sending with different speeds for header and payload. Header is always transmitted at lowest speed, why?

1. REDIRECT AA1-History

⌘Summary

Focus on three communication areas

• ultra short range, e.g. NFC
• vicinity, e.g. Bluetooth
• local area, e.g. WLAN
• mobile communications, e.g. LTE