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


3

Outline

— Introduction←— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions


4

Protocol

— “Language” used for communication between networkedsystems• Formatting of data• Entity behaviour


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


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


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


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


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


10

Outline

— Introduction— The early years (1997-2002)←— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions


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


12

Outline

— Introduction— The early years (1997-2002)— Expansion (2003-2007)←— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions


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


14

Expansion (2/2)


15

Outline

— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)←— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions


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


17

Accelerated Growth (2/6)


18


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


19



20


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


21



22

Outline

— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)←— Near future (2013-2015)— Evolution trends— Conclusions


23

Today

2012: 802.11aa— Video transport streams— Audio/video streaming— Group addressing

2012: 802.11ae— Prioritization of management frames— Improved network performance


24

Outline

— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)←— Evolution trends— Conclusions


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


26

Near Future (2/5)

Image source: Wireless Gigabit Alliance http://wirelessgigabitalliance.org/


27

Near Future (3/5)


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


29

Near Future (5/5)


30

Outline

— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends←— Conclusions


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?


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)


33

Outline

— Introduction— The early years (1997-2002)— Expansion (2003-2007)— Accelerated growth (2008-2011)— Today (2012)— Near future (2013-2015)— Evolution trends— Conclusions←


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?


35

Thank You!


Date post:	22-May-2020
Category:	Documents
Upload:	others
View:	5 times
Download:	0 times

The 802.11 Protocol Suite, What is it Evolving Towards ... · 5.9 GHz (802.11p) 60 GHz (802.11ad)...

Documents