The 802.11 Protocol Suite, What is it Evolving Towards ... · 5.9 GHz (802.11p) 60 GHz (802.11ad)...
Transcript of The 802.11 Protocol Suite, What is it Evolving Towards ... · 5.9 GHz (802.11p) 60 GHz (802.11ad)...
The 802.11 Protocol Suite, What is it EvolvingTowards?Trial Lecture
Martin EianDepartment of Telematics
21 September 2012
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
2
Learning Goals and Scope
— Be able to answer the following questions:• What is the IEEE 802.11 protocol suite?• How has IEEE 802.11 evolved from 1997 until today?• How will IEEE 802.11 evolve in the near future?• What is IEEE 802.11 evolving towards?
— Out of scope• Business models• Detailed comparison of IEEE 802.11 and mobile/cellular phone
networks• End to end security
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
3
Outline
— Introduction←— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
4
Protocol
— “Language” used for communication between networkedsystems• Formatting of data• Entity behaviour
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
5
Institute of Electrical and ElectronicsEngineers (IEEE)
IEEE is the world’s largest professional associationdedicated to advancing technological innovation andexcellence for the benefit of humanity. IEEE and itsmembers inspire a global community through IEEE’shighly cited publications, conferences, technologystandards, and professional and educational activities.1
1http://origin.www.ieee.org/about/index.html
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
6
IEEE 802 LAN/MAN StandardsCommittee
The IEEE 802 LAN/MAN Standards Committeedevelops and maintains networking standards andrecommended practices for local, metropolitan, and otherarea networks, using an open and accredited process,and advocates them on a global basis.2
2http://www.ieee802.org
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
7
IEEE 802.3 Ethernet
— Wired Local Area Network (LAN)— Shared medium
• Carrier sense multiple access with collision detection(CSMA/CD)
— Local networks→ Internet access• Internet Engineering Task Force (IETF) Internet Protocol (IP)
suite
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
8
IEEE 802.11 - Wireless LANs3 4
3http://www.ieee802.org/11/4R. Jordan and C. T. Abdallah, “Wireless Communications and Networking: An
Overview”, IEEE Antennas and Propagation Magazine, February 2002
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
9
The Big Picture— Personal Area Network (PAN)
• 802.15/Bluetooth• Example: wireless headset
— Local Area Network (LAN)• 802.11/WiFi• Example: WiFi at home
— Metropolitan Area Network (MAN)• 802.16/WiMAX• Example: wireless broadband
— Wide Area Network (WAN)• GSM, UMTS, LTE• Example: mobile/cellular phone networks• Different design philosophy - intelligent networks, centralized
control
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
10
Outline
— Introduction— The early years (1997-2002)←— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
11
The early years
1997: 802.11— 2 Mbit/s5
— 2.4 GHz radio frequency band1999: 802.11a
— 54 Mbit/s— 5 GHz radio frequency band
1999: 802.11b— 11 Mbit/s— 2.4 GHz radio frequency band
51 Mbit/s = 1 million bits per second
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
12
Outline
— Introduction— The early years (1997-2002)— Expansion (2003-2007)←— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
13
Expansion (1/2)6
2003: 802.11g— 54 Mbit/s— 2.4 GHz radio frequency band
2004: 802.11i— Security enhancements— External authentication, authorization and
accounting (AAA) servers2005: 802.11e
— Quality of Service (QoS)— Improved multimedia support
• Telephony• Video• On-line games
6U. Varshney, “The Status and Future of 802.11-Based WLANs”, IEEEComputer Magazine, June 2003
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
14
Expansion (2/2)
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
15
Outline
— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)←— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
16
Accelerated Growth (1/6)2008: 802.11k
— Radio resource management— Local and remote measurements and reports
2008: 802.11r— Fast roaming between networks— Reduce connection set-up time introduced by
802.11i2008: 802.11y
— 3.6 GHz radio frequency band (U.S.)2009: 802.11n
— Multiple data streams— 600 Mbit/s (150 Mbit/s per stream)— 2.4 GHz and 5 GHz radio frequency bands
2009: 802.11w— Protected management frames
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
17
Accelerated Growth (2/6)
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
18
Accelerated Growth (3/6)
2010: 802.11p— Vehicular environments— Vehicle to vehicle— Vehicle to infrastructure— 5.9 GHz radio frequency band
2010: 802.11z— Extensions to direct link setup
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
19
Accelerated Growth (4/6)
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
20
Accelerated Growth (5/6)
2011: 802.11s— Mesh networks
2011: 802.11u— Interworking with external networks— Mobile/cellular network offload— Network discovery and selection
2011: 802.11v— Central management and coordination of wireless
devices— Handovers, channels, diagnostics, event
reporting, location, timing measurements, trafficfiltering, notifications
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
21
Accelerated Growth (6/6)
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
22
Outline
— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)←— Near future (2013-2015)— Evolution trends— Conclusions
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
23
Today
2012: 802.11aa— Video transport streams— Audio/video streaming— Group addressing
2012: 802.11ae— Prioritization of management frames— Improved network performance
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
24
Outline
— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)←— Evolution trends— Conclusions
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
25
Near Future (1/5)8
2012: 802.11ad— Short range, high speed PAN— Peripherals, TVs, monitors, projectors— 7 Gbit/s7
— 60 GHz radio frequency band2014: 802.11ac
— Multiple data streams— >1 Gbit/s (500 Mbit/s per stream)— 5 GHz radio frequency band
71 Gbit/s = 1000 Mbit/s8S. J. Vaughan-Nichols, “Gigabit Wi-Fi Is on Its Way”, IEEE Computer
Magazine, November 2010
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
26
Near Future (2/5)
Image source: Wireless Gigabit Alliance http://wirelessgigabitalliance.org/
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
27
Near Future (3/5)
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
28
Near Future (4/5)
2014: 802.11af— TV white space (500 MHz)— Rural broadband access— Transmission through thick walls
2014: 802.11ai— Fast initial link setup— Faster authentication and association
2015: 802.11ah— Sub 1GHz— >100 kbit/s— Low power— Sensor networks, Internet of things
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
29
Near Future (5/5)
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
30
Outline
— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends←— Conclusions
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
31
Evolution Trends (1/2)— Speed - from 2 Mbit/s to 7 Gbit/s
• 3500 times faster• Viable replacement for wired networks?
— Radio frequency bands• TV white space, 500 MHz (802.11af)• Sub 1 GHz (802.11ah)• 2.4 GHz (802.11, 802.11b, 802.11g, 802.11n)• 3.6 GHz (802.11y)• 5 GHz (802.11a, 802.11n, 802.11ac)• 5.9 GHz (802.11p)• 60 GHz (802.11ad)
— Application domains• Wireless PAN (802.11ad)• Wireless LAN• Wireless MAN (802.11s, 802.11af)• Wireless WAN?
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
32
Evolution Trends (2/2)
— Interoperability• Mobile/cellular network offload• Handovers/roaming• Network service discovery• Authentication, authorization, accounting
— Applications• Internet access• Peer-to-peer (P2P)• Vehicular• Medical• Sensor networks and Internet of things• Smart grid• Industrial (SCADA)
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
33
Outline
— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions←
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
34
Conclusions
— From wireless LAN to generic access network• Together with IETF standards• As part of other networks
— Ubiquitous wireless networking• Merge or compete with 802.16/WiMAX, 802.15/Bluetooth• Compete with mobile/cellular networks?
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?
35
Thank You!
www.ntnu.no Martin Eian, The 802.11 Protocol Suite, What is it Evolving Towards?