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Ieee 802 11

IEEE 802.11

802.11

Wireless Local Area Networks

Bruce Kraemer

Chair 802.11

[email protected]

V09


Disclaimer

Disclaimer…

“At lectures, symposia, seminars, or educational courses, an individual presenting information on IEEE standards shall make it clear that his or her views should be considered the personal views of that individual rather than the formal position, explanation, or interpretation of the IEEE.”

IEEE-SA Standards Board Operation Manual (subclause 5.9.3)

2

18-Nov-14


Introduction and agenda

Introduction and Agenda

  • Presentation

    • Context

    • History

    • Market

    • Science Challenges

    • Standard Baseline

    • Extensions

  • Further Information

    • Amendment Project details

    • References

3

18-Nov-14


Workshop presentations

Workshop Presentations

  • http://ieee802.org/minutes/2011-March/802%20workshop/index.shtml

March 2011 IEEE 802 Workshop Presentations

802.1

802.3

802.11

802.15

802.16

802.17

802.18

802.19

802.20

802.21

802.22

802.23

Overview of 802 rules


Ieee 802 11

Context


Ieee 802 organization

IEEE 802 Organization

IEEE Standards Association

Standards Activities Board

Sponsor

IEEE 802

Local and Metropolitan Area Networks

(LMSC)

Sponsor

Sponsor

Sponsor

802.3

CSMA/CD

Ethernet

802.5

Token

Passing

Ring

802.15

Wireless

Personal

Area

Networks

802.11

Wireless

WLAN

802.1

Higher

Layer

LAN

Protocols

802.17

Resilient

Packet

Ring

802.19

Co-existence

TAG

802.21

Media

Independent

Handoff

802.16

Broadband

Wireless

Broadband

Access

802.18

Radio

Regulatory

TAG

802.22

Wireless

Regional

Area

Networks

802.20

Mobile

Broadband

Wireless

Access

IEEE 802.11: ~500 Participants

Voting Members ~300

www.ieee802.org/11


Ieee 802 11

History


Activity history

Activity History

Feb 14, 1876: Bell files telephone patent

June 1897: Marconi work- “Signaling through Space without Wires”

1970: ALOHAnet operational (Abramson, 9600 baud)

1976: Metcalf & Boggs: “Ethernet: Distributed Packet-Switching for Local Computer Networks”

1980: Project 802 formed (1 Mbps initially, revised to 20 Mbps 1982) (Feb 1980 , 125+ attendees)

1980: Ethernet Bluebook published (September , Digital. Intel, Xerox)

1981: FCC issues NOI for unlicensed spectrum

1983: First version of 802.3 10Base5 spec completed

1985: FCC opens ISM Band- spread spectrum allowed

1985: First version of 802.3 published (10 Mbps)

1987: Project 802.4L – Wireless Token Bus begins

1990: IEEE 802 drops 802.4L starts 802.11 project

1990: 802.3 10BASE-T (802.3i) released

1997: IEEE 802.11 standard approved (2.4GHz – 1Mbps)

1999: Apple IBook introduced with integrated 802.11 (AirPort)

18-Nov-14


Activity history1

Activity History

1997: IEEE 802.11 standard approved (2.4GHz – 1Mbps)

1998: UNII (Unlicensed National Information Infrastructure) Band - 5 GHz

1999: IEEE 802.11 standard achieved ISO/IEC approval

1999: IEEE 802.11a (5GHz – 54Mbps) - approved IEEE 802.11b (2.4GHz- 11Mbps)- approved

1999: Formation of WECA (now Wi-Fi Alliance)

2001: IEEE 802.11d Regulatory Domains - approved

2003: IEEE 802.11g (Higher rate 2.4GHz PHY) – approved IEEE 802.11i (Security) - approved IEEE 802.11h (Spectrum Mgmt) - approved IEEE 802.11f (interaccess point protocol) – approved

2005: IEEE 802.11e (MAC enhancements – QoS) – approved


Ieee 802 11

Market Acceptance


Market size and trends

Market Size and Trends

2 million

Units

per day

  • Market size & segment diversity continues to increase

900

800

700

600

1 million

Units

per day

500

400

Devices (million)

300

200

Enterprise APs

Home/SOHO

100

CE

Phones

0

PCs

2006

2010

Source: In-Stat

11

18-Nov-14


Wi fi alliance

Wi-Fi Alliance

  • Founded 1999

  • 400 member companies

    The Wi-Fi Alliance provides:

  • Interoperability certification programs

    • Over 9000 products certified

  • Market messaging

http://www.wi-fi.org/


Wi fi hotspot public access

Wi-Fi Hotspot Public Access

517,242 hot spots in 144 countries

Source: JiWire http://v4.jiwire.com/search-hotspot-locations.htm

87% of US hotels offer Wi-Fi

Source: American Hotel & Lodging Assn


Ieee 802 11

Science Challenge


Air is a poor substitute for wire or fiber

Air is a Poor Substitute for Wire or Fiber

Large Scale fading

Attenuation (distance, obstructions)

Delay

Small scale fading

Multipath (Reflections)

Doppler

Frequency selective fading

Regulated & Shared

Regulatory considerations –by region

Interference

15

18-Nov-14


Wireless constraints

Wireless Constraints

Shannon-Hartley

C= channel capacity (bits/sec)

BW= channel bandwidth (Hz)

S = Signal

N = Noise

watts (not dB)

C = BW x log2 1+S

N

Friis path loss

1

GtxGrx c2

Prx

=

Ptx

x

s Nf

(4pd)2 fc2


Ieee 802 11

Standard Baseline


The 802 lan architecture

The 802 LAN Architecture

OSI reference model

End station

End station

Application

(Higher

Layers)

(Higher

Layers)

7

6

5

4

3

2

1

Presentation

Session

LLC sublayer

Transport

MAC Bridge

Network

MAC service

user

Link

LLC

LLC

RELAY

MAC

MAC

MAC

MAC

MAC serviceprovider

MAC sublayer

Physical

Phy

Phy

Phy

Phy

Physical layer

LAN

LAN

Medium


Ieee 802 11

802.11 Project Scope


Basic access method protocol behavior

Basic Access Method - Protocol Behavior

  • The 802.11 family uses a MAC layer known as CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance)

  • Ethernet uses CSMA/CD - collision detection).

    Concept

  • Listen on the channel.

  • If the channel is quiet (no active transmitters) - send a packet.

  • If channel is occupied- wait longer (exponential backoff)

  • 20 micro sec for DS systems.

  • If the channel is still idle at the end of the CONTENTION period the node transmits its packet otherwise it repeats the waiting process


Distributed control function interframe space difs

Distributed Control Function Interframe SpaceDIFS

  • DIFS = SIFS + (2 * Slot time)


Basic service protocol listen before talk 1mbps example

Basic Service Protocol - Listen Before Talk1Mbps example

Listen

Talk

Listen

Talk

Listen

Talk

Listen

Talk

1500 Byte User DATA

PPDU

1500 Byte User DATA

PPDU

12192 ms

12192 ms

DIFS

(listen)

DIFS

(listen)

50 ms

50 ms

ACK

PPDU

ACK

PPDU

SIFS

SIFS

10 ms

304 ms

10 ms

304 ms

D = DCF Inter Frame Space (DIFS)

S = Short Inter Frame Space (SIFS)


Ieee 802 11

Standard Extensions

(Amendments)


Technology solutions

Technology Solutions

PHY

Bandwidth

Modulation

Multiple Streams , Multiple Antennas

Forward Error coding

MAC

Media access efficiency

Quality of Service

Network measurement & Management

Security

24

18-Nov-14


Summary of major phy projects

Summary of Major PHY Projects

A - 20 MHz BW, 5GHz

B - 20 MHz BW, 2.4 GHz

G - 20 & 40 MHz BW, 2.4 GHz

N - 20 & 40 MHz BW, 2.4 & 5GHz

AC – 20 to 160 MHz BW, 5GHz

AD – 2 GHz BW, 60 GHz

AF – TV White Space Spectrum

AH – Unlicensed spectrum below 1 Gz

Completed

Underway


Phy project sequence

PHY Project Sequence

100 Gbps

10 year

yardstick

10 Gbps

ad

ac

1 Gbps

802.3

milestones

n

100 Mbps

a

g

10 Mbps

b

802.11

milestones

Original

1 Mbps

100 Kbps

80

85

90

95

00

05

10

15


802 11 architecture overview

802.11 Architecture Overview

  • Multiple Over the Air PHY options

  • One common MAC

af

ah

a

b

g

n

ac

ad

802.11 MAC


Summary of major mac projects

Summary of Major MAC Projects

D – Country information

E - QoS

F – Inter AP communication

H – DFS,TPC Spectrum sharing with radars in 5GHz

J – Japan spectrum @ 4.9 GHz

K – Radio Measurement

P – Vehicular Environments

R – Fast roaming

S – MESH Networking

U – Inter-Networking

V – Network Management

W – Secure Management Frames

Z – Tunneled Direct Link

AA – Video Transport

AE – QoS for Management Frames

AI – Fast Initial Link Setup


Overview of project objectives

Overview of Project Objectives

PHY (.11, a, b, g, j, n, p, y, ac, ad, af, ah)

  • Change data rate options

  • Change spectrum

    MAC

  • Security (i, w)

  • Measurement and Management (k, v)

  • Flow control and QoS (e, aa, ae)

  • Time required to establish connection (p, r, ai)

  • Spectral Efficiency

  • Regulatory behavior (d, h)

  • Radio node connection topology (s, z)

  • Connection with other networks (u)


Ieee 802 11 standards pipeline

IEEE 802.11 Standards Pipeline

802.11z

TDLS

802.11s

Mesh

802.11 -2007

802.11r

Fast Roam

MAC

e

QoS

802.11u

WIEN

802.11k

RRM

h

DFS & TPC

802.11V

Network

Management

802.11aa

Video Transport

802.11Y

Contention

Based

Protocol

i

Security

802.11ai

FILS

f

Inter AP

Smart Grid

802.11ae

QoS Mgmt Frm

802.11p

WAVE

802.11mb

Revision

802.11 ah

a 54 Mbps

5GHz

802.11n

High

Throughput

(>100 Mbps)

802.11af

TVWS

g

54 Mbps

2.4GHz

802.11ac

VHT 5GHz

802.11W

Management

Frame

Security

802.11b (’99)

11 Mbps

2.4GHz

802.11ad

VHT 60GHz

PHY

Published

Amendment

Discussion Topics

Study

groups

WG

Letter Ballot

Sponsor

Ballot

TG without draft

Published

Standard


Ieee 802 11

Standard Documents


Standard revision process

Standard Revision Process

802.11-1999

528 pages

Amendments

  • a

  • b

  • d

  • e

  • g

  • h

  • i

  • j

802.11-2007

1220 pages


Standard revision process underway

Standard Revision Process - underway

802.11-2007

1220 pages

Amendments

  • k (223 p)

  • n (560 p) D11.0

  • p ( 45 p)D11.0

  • r (116 p)

  • y ( 84 p) D11.0

  • w (114 p) D10.0

  • v (428 p) D16.0

802.11-revision

D7.02 2608 pages


Standard revision process underway1

Standard Revision Process - underway

802.11-revision

D7.02 2608 pages

Amendments

  • u (218 p) D13.0

  • s (361 p) D9.0

802.11-2012

~3000 pages


Standard revision process1

Standard Revision Process

802.11-2012

~3000 pages

Amendments

  • aa (126 p) D3.0

  • ac (193 p) D0.1

  • ad (406 p) D1.1

  • ae ( 49 p) D2.0

  • af ( 159 p) D1.0

  • ah ( ??? p) D1.0

  • ai ( ??? p) D1.0

802.11-2016

Publication ~ 4000


Ieee 802 11

Unlicensed SPectrum


Unlicensed frequency bands

Unlicensed Frequency Bands

<700 MHz

900 MHz

2.4 GHz

5 Ghz

60 GHz


Spectrum for current phy amendments

a

n

j

y

802.11

b

g

n

Spectrum for current PHY Amendments

6 GHz

5 GHz

4 GHz

3 GHz

2 GHz

1997

1999

2001

2003

2005

2007

2009

Calendar Time


Spectrum forward looking

100 GHz

10 GHz

.1 GHz

1 GHz

Spectrum – Forward Looking

ad

a

n

j

y

802.11

b

g

n

ah

1997

1999

2001

2003

2005

2007

2009

2011

2013


Ieee 802 11

Further Information


Further details follow

Further Details Follow

802.11z

TDLS

802.11s

Mesh

802.11 -2007

802.11r

Fast Roam

MAC

e

QoS

802.11u

WIEN

802.11k

RRM

h

DFS & TPC

802.11V

Network

Management

802.11aa

Video Transport

802.11Y

Contention

Based

Protocol

i

Security

802.11ai

FILS

f

Inter AP

Smart Grid

802.11ae

QoS Mgmt Frm

802.11p

WAVE

802.11mb

Revision

802.11 ah

a 54 Mbps

5GHz

802.11n

High

Throughput

(>100 Mbps)

802.11af

TVWS

g

54 Mbps

2.4GHz

802.11ac

VHT 5GHz

802.11W

Management

Frame

Security

802.11b (’99)

11 Mbps

2.4GHz

802.11ad

VHT 60GHz

PHY

Published

Amendment

Discussion Topics

Study

groups

WG

Letter Ballot

Sponsor

Ballot

TG without draft

Published

Standard


802 11n high throughput

802.11n - High Throughput

Overall project goals

Much higher data rates

20 & 40 MHz channel band widths

1 to 4 spatial streams

1 stream for Client (Mandatory)

2 stream for Access Point (Mandatory)

½ Guard Interval

56 tones (in 20MHz)

5/6 coding

Green Field preamble

Block aggregation

Maximum PHY throughput of 600Mbps

Better Range

Beam Steering

Status: Published 2009


Tgn throughput

TGn Throughput


802 11p wireless access in vehicular environments wave

802.11P Wireless Access in Vehicular Environments (WAVE)

Defines enhancements to support data exchange between high-speed vehicles and between these vehicles and the roadside infrastructure in the licensed ITS band of 5.9 GHz.

Applications planned within the ITS domain (ITS services), including:

collision avoidance

traveller information

toll collection

commercial vehicle operations

transit operations

traffic management

connecting the vehicle to the Internet.

Status: Published 2010


802 11s mesh

802.11s MESH

An amendment to create a Wireless Distribution System with automatic topology learning and dynamic wireless path configuration.

Target number of packet forwarding nodes: ~32

Support unicast and broadcast/multicast traffic

Use 802.11i security or an extension thereof

Extensible routing to allow for alternative forwarding path selection metrics and/or protocols

Use the 802.11 four-address frame format or an extension

Interface with higher layers and connect with other networks using higher layer protocols

Status: Produced draft 4.0 – preparing to go to Sponsor Ballot

Publication expected fall 2011


Classic 802 11 wireless lan

Classic 802.11 Wireless LAN

BSS = Basic Service Set

Wired Infrastructure

AP

AP

AP

STA

STA

STA

AP

STA

STA

STA

STA

STA

ESS = Extended Service Set≈ SSID

= radio link

Wireless Paradox: WLAN Access Points are Typically Wired


Unwire the wlan with mesh

Unwire the WLAN with Mesh

Wired Infrastructure

Mesh

AP

Mesh

AP

Mesh

Point

Mesh

AP

STA

STA

STA

Mesh

AP

STA

STA

STA

STA

STA

ESS = Extended Service Set≈ SSID

= mesh radio link


Mesh tutorial

MESH Tutorial

Title: IEEE 802.11 MESH

Date: Monday 14 March 2011

Time: 19:30-21:00

Location: Marina Bay Sands, Sands Ballroom

Registration fee: None

http://ieee802.org/Tutorials.shtml


Tgu wireless interworking

Tgu – Wireless Interworking

Background

As IEEE 802.11 hotspot deployment has become more widespread throughout the world.

The growth of hotspots has resulted in more users becoming frustrated with the non uniformity of interworking systems (e.g. poor service definition, disparate registration procedures, non-ubiquitous roaming).

Generically these issues have been referred to as interworking, which refers to the functionality and interface between an IEEE 802.11 access network and any external network.


Tgu wireless interworking1

Tgu – Wireless Interworking

Objectives

The primary objective of IEEE 802.11u, is to create an amendment to address interworking issues between an IEEE 802.11 access network and any external network to which it is connected.

Interworking, is actually a collection of different functionalities:

Online Enrolment

Network Selection

Security

Authorization from Subscriber Network

Media Independent Handover Support

Status: Last Draft balloted was D 13.0 – Published Feb 2011


802 11v network management

802.11V Network Management

Explosive growth of 802.11 wireless LANs emphasized the need to

Maintain network quality and security

Manage the RF environment

largely driven by interference from neighbouring wireless networks

Secure the network to maintain privacy and prevent unauthorized use.

Optimize the Network

improve the ability to shape the network

Status: Last Draft balloted was D 16.0 – Published Feb 2011


Tgv content increased station power saving

TGv Content – Increased Station Power Saving

  • Traffic Filtering Service

    • Enables the AP to filter traffic for the station, and deliver only frames of a specified type.

  • WNM-Sleep Mode

    • Provides an additional, extended power save mode.

    • When used with the Traffic Filtering Service, can provide significant station power savings, and provide a “Wake on WLAN” service.

  • Flexible Broadcast/Multicast service

    • Enables multicast frames to be sent at longer delivery intervals and higher data rates, improving performance of multicast applications, and reducing station “awake time”

  • Proxy ARP

    • Enables stations to remain in power save mode longer

  • TIM Broadcast – Enables stations to check for queued traffic without receiving a full Beacon frame.


Example tgv based applications

Example TGv Based Applications

“Wake on WLAN” Service– Stations sleep and are “awakened” when specific frames are received

Example application: User leaves corporate desktop in “sleep mode”, goes home, uses VPN from home to corporate LAN, wakes up and uses desktop remotely

Reduces power consumption of end devices, even stationary ones

Improved client power saving

Proxy ARP, TIM Broadcast, FBMS, Sleep Mode, Traffic Filtering

“Wireless Speakers” – Use Location services timing measurements to support audio synchronization

Improved Multicast Performance

Network Diagnostic Analysis/Troubleshooting

Co-located Interference Reporting, Diagnostic Reporting, Event Reporting, Multicast Diagnostics Reporting


802 11w protected management frames

802.11w – Protected Management Frames

One of the frame types defined in 802.11 is “Action” sub-type “Management”

Management frames were previously less well protected than data frames.

The objective of this was to improve the security by providing data confidentiality of action management frames, deauthentication and disassociation frames

This standard protects networks from attack by malicious systems that forge disassociation requests that appear to be sent by valid equipment

Status: Last Draft balloted was D 10.0 – Published 2009


802 11z tunneled direct link

802.11z Tunneled Direct Link

The purposes of this amendment are to create a new DLS mechanism which:

a) Does not require access point upgrades (i.e. supports DLS operation with the non-DLS capable access points),

b) Which supports power save mode (when associated with either DLS or non-DLS capable access points), and

c) Continues to allow operation of DLS in the presence of existing DLS capable access points

Status: Last Draft balloted was D 13.0 – Published 2010


P802 11z example

P802.11z example

  • Access Point maintains control over network connection air times

  • However, device pairs can optimize their conversation and use modes not supported by the access point


802 11 aa video transport stream

802.11 AA Video Transport Stream

Provides a set of enhancements to 802.11 MAC to significantly improve video streaming performance while maintaining data and voice performance by improving Multicast/Broadcast video streams for link reliability with low delay and jitter.

Enhancements to the 802.11 MAC for robust video streaming offer:

Interworking with relevant 802.1 mechanisms including, but not limited to, 802.1Qat, 802.1Qav and 802.1AS

Graceful degradation of video streams when there is insufficient channel capacity.

Increasing robustness in overlapping BSS environments, without the requirement for a centralised management entity.

Modifying EDCA timing and parameter selection for video transport

Status: Just completed WG balloting of draft 3.0 – preparing to go to Sponsor Ballot


802 11ac very high throughput 6ghz

802.11AC Very High Throughput <6GHz

Goal: A multi-user BSS peak aggregated throughput of at least 1Gbps as measured at the MAC data service access point (SAP) [new term MU-MIMO, multi-user MIMO]

Robust and flexible bandwidth management: native support for simultaneous multiple bandwidth operation (within a given frequency band)

Addoptional outdoor compatible delay spread resistance

Below 6GHz carrier frequency operation excluding 2.4GHz operation and ensuring backward compatibility with legacy IEEE802.11a/n devices in the 5GHz unlicensed band.

Status: 0.1 draft out for review – planning to begin balloting on D1.0 in March 2011


802 11ac very high throughput 6ghz1

802.11AC Very High Throughput <6GHz

5 GHz PHY

20, 40, 80, 160 MHz & 80+80 channel bandwidth

Up to 8 spatial streams

Up to 4 simultaneous users per transmitter

Modulation options: BPSK, QPSK, 16 QAM, 64 QAM, 256 QAM

Code rates: ½, 2/3, ¾, 5/6

280 Data rates

from 6.5Mbps [1SS, ½ rate , 20MHz, BPSK, 800ns GI]

to 6933.3 Mbps [8SS, 5/6 rate , 160MHz, 256QAM, 400ns GI]


802 11ad very high throughput

802.11AD Very High Throughput

Market drivers for Very High Throughput wireless LAN, include:

Never ending quest for higher performance computing drives higher processing power.

Media appliances are moving to HD content, driving 10X storage capacity and bandwidth requirements.

Mainstream Wired LAN products have shifted to Gigabit per second speeds. The trend for a purely wireless campus drives the need for wired equivalent multi-Gigabit per second wireless solutions.

Aggregate capacity increase using reduced cell sizes.

Status: Completed preparation of draft 1.0 – balloted in WG October 2010. Preparing comment resolutions for next draft revision and ballot.


802 11ad very high throughput1

802.11AD Very High Throughput

60 GHz PHY

1.88 GHz channel bandwidth

3 channels available in US, Europe, Japan

Transmit power limits:

US: 40 dBm Europe: 57 dBm Japan: 10dBm

Modulation options: SQPSK, QPSK, 16 QAM, 64 QAM

Code rates: ½, 5/8, ¾, 13/16

Data rates from 693 to 6756.75 Mbps


802 11ae qos for management frames

802.11ae QoS for Management Frames

This project will consider the classification and prioritization of management frames

All IEEE 802.11 MAC management frames are transmitted at the highest priority.

Previous amendments ‘k’, ‘y’, ‘w’, ‘v’, and ‘u’ have introduced features that rely on management frames, which are essential for network operation.

In some cases, the management traffic will contend with network data traffic and reduce the performance of certain WLAN applications.

Providing a mechanism to prioritize management frames will enable improved performance of IEEE 802.11 networks

This project will consider management frames that are used in both pre- and post- association.

Management frames of subtype Action will be considered. Other management frame types may be considered.

Status: Just completed ballot on 2nd draft.


802 11af operation in the tv white spaces

802.11af - Operation in the TV White Spaces

This project will make the necessary MAC and PHY changes to enable 802.11 products to take advantage of this additional spectrum available due to the global transition to Digital TV (DTV) and lightly used sub-Gigahertz RF spectrum now becoming available, much of it for unlicensed, license exempt and/or lightly licensed use.

Example, On November 4, 2008, the United States FCC approved Report & Order 08-260, allowing unlicensed use of TV band spectrum, in accordance with Part 15. Subpart H of FCC rules. Ofcom (UK) is in the process of making this Digital Dividend band available, and the EU has conducted a consultation on the band. Other regulatory domains are expected to follow.

Status: Produced draft 1.0 – just completed first ballot in February 2011


Tgah sub 1 ghz

TGah – Sub 1 GHz

  • Project proposes to use spectrum below 1 GHz.

  • Lower frequency will increase range

  • Channel bandwidths have typically been 20 MHz or more, lower channel bandwidth will be required.

  • Status: New Task group November 2011– working on Use Cases and will begin to develop first draft


Tg ai fils

TG ai (FILS)

  • Fast Initial Link Setup goal is to reduce initial association time to allow fast connection and data transfer in situations where users are very dense and highly mobile.

    Goal definition:

  • Build a secure, fast initial authentication that

  • a) is suitable for users experiencing a small dwell time in a cell (due to high mobility or small cell sizes users)

  • b) scales for large number of simultaneously occurring initial authentications

  • Status: New Task Group January 2011– describing Use Cases – will begin to develop first draft


Future projects

Future Projects

Security

Low power consumption

Longer range

Spectral efficiency

Dynamic Spectrum Sharing

Geolocation


802 11 links references

802.11 Links References

Home page for 802.11

http://grouper.ieee.org/groups/802/11

Documents

https://mentor.ieee.org/802.11/documents

Timelines & Project History

http://www.ieee802.org/11/Reports/802.11_Timelines.htm

Engineering articles: Search 2,879,214 documents

http://ieeexplore.ieee.org/Xplore/guesthome.jsp

Search for “802.11” returns 6382 hits

Get 802

http://standards.ieee.org/about/get/

http://standards.ieee.org/about/get/802/802.11.html


Articles about 802 11

Articles about 802.11

IEEE Wireless Communications

IEEE Network

IEEE Communications Magazine

IEEE Transactions on Wireless Communications

IEEE Spectrum

Proceedings of the IEEE

IEEE Transactions on Mobile Computing


Recently published papers re 802 11

Recently Published Papers re 802.11

Selfishness in Mesh Networks

MAC Layer Misbehavior in Wireless Networks: Challenges and Solutions

Designing VoIP Session Management over Interworked WLAN-3G Networks

The need for Access Point Power Saving in Solar Powered WLAN MESH Networks

Interworking of WLAN-UMTS Networks

A Scalable Monitoring System for 802.11 Wireless Networks

Toward Dependable Networking: Secure Location and Privacy at the Link Layer

Handover Management in Integrated WLAN and Mobile WiMAX Networks

Minimum Interference Channel Assignment in Multiradio Mesh Networks

An Equal-Spacing-Based Design for QoS Guarantee in 802.11e HCCA Wireless Networks

New MAC Scheme Supporting Voice/Data Traffic in Wireless Ad Hoc Networks

Improving Security of Real-Time Wireless Networks Through Packet Scheduling

A Cross-Layer Approach for Per-Station Fairness in TCP over WLANs

Revisiting the Hidden terminal Problem in a CSMA/CA Wireless Network


The ieee shop

The IEEE Shop


Get 802 802 11 examples

Get 802 – 802.11 examples

IEEE 802.11™: WIRELESS LOCAL AREA NETWORKS (LANs)

IEEE 802.11-2007 IEEE Standard for Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications

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IEEE 802.11k-2008 IEEE Standard for Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements Part 11: Wireless LAN Medium Access Control (MAC)and Physical Layer (PHY) Specifications Amendment 1: Radio Resource Measurement of Wireless LANs

IEEE 802.11n-2009 IEEE Standard for Information technology--Telecommunications and information exchange between systems--Local and metropolitan area networks--Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications Amendment 5: Enhancements for Higher Throughput


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