[PPT]What is IEEE 802.11 Doing?ieee802.org/11/Publicity/What is 802.11 doing.pptx · Web viewK –...
Transcript of [PPT]What is IEEE 802.11 Doing?ieee802.org/11/Publicity/What is 802.11 doing.pptx · Web viewK –...
What is IEEE 802.11 doing?A short summary of the current IEEE 802.11 activities and description of IEEE processes Presented by <your-name>, <occasion> <date>This version last updated 2015-11-26, APS
Before We Share our Opinions……
“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)
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The IEEE Standards Association process
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IEEE-SA Individual and Corporate Standards Development
Open, consensus-based processOpen – anybody can participate (payment of meeting fees may be needed)Individual standards development– Each individual has one vote
Corporate standards development– One company/one voteResults frequently adopted by national, regional, and international standards bodies
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IEEE Standards Development: Process Flow
Idea!
Project Approval Process
Develop Draft Standard (in Working Group)
Sponsor Ballot
IEEE-SA Standards Board Approval Process
Publish Standard
Maximum of 4 years
Revise or Withdraw StandardsMaximum of 10 years
Decide / Choose Technology
Write / update a Draft
Ballot Draft
Resolve Comments
Done?
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IEEE Standards Development: Project Authorization
A project may be started by any individual or companyEach project must be supported by a technical group in the IEEE– Referred to as a “Sponsor”– Official developer of standard
Projects approved through document called Project Authorization Request (PAR)–Summarizes details of project
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IEEE Standards Development: Develop Draft Standard
A standard is written by a working group–The working group consists of participants interested in creating the standard
The working group chooses a way to create the first draft document– The group writes initial draft, or– The draft developed from existing
documents and specificationsDraft document are refined in the working group through multiple iterations and review
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IEEE Standards Development: Consensus process
Consensus is determined through a ballotInterested individuals or organizations are invited to ballot on draft standardsA ballot group receives document, reviews it, and votes/comments on it–Vote yes (approve), no (disapprove), abstain–Can offer comments on document as wellUltimate approval of standard is granted by the IEEE-SA Standards Board
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IEEE Standards Development: Publication & Maintenance
Standard published after approvalStandard is valid for 10 years after approval– After 10 years, must be revised or withdrawn
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Introduction to IEEE 802.11
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IEEE 802.11 Introduction
IEEE 802.11 is a working group, responsible for writing Wireless Local Area Network (LAN) standards
802.11 operates under– The “Sponsor”: IEEE LMSC “LAN / MAN Standards Committee” – aka
“802”– IEEE Computer Society– IEEE-SA Standards Board
Work in 802.11 is divided into various activities– Task groups – one per approved standard or amendment to be developed– Study groups or topic interest groups – the precursor to a task group that
investigates marketability, feasibility and determines initial requirements– Various standing committee's responsible for ongoing work, such as
“Architecture”
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IEEE 802.11 Scope
Wireless local area networks
Typical range up to 100m
Generally use unlicensed spectrum– Exception for 802.11y: “lightly licensed”– Exception for TV whitespace
Deployments: Broadband network access, public venue access, sensor networks, mesh networks, automotive.
Present in these devices: laptops, phones, tablets, network infrastructure, home appliances, consumer electronics, healthcare devices
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802.11-2003
802.11-2012
IEEE 802.11 Revisions
11wManagement
Frame SecurityIEEE
Std802.11 -1997
MAC&
PHY
MAC 11kRRM
11rFast Roam
11a 54 Mbps
5GHz
11b11 Mbps2.4GHz
11dIntl roaming
11vNetwork
Management
11sMesh
11uWIEN
11yContention
BasedProtocol
11nHigh
Throughput(>100 Mbps)
11zTDLS
11pWAVE
802.11-2016 (TBC)
802.11-2007
11g54 Mbps2.4GHz
11eQoS
11iSecurity
11hDFS & TPC
11jJP bands
11f Inter AP
11aaVideo Transport
11aeQoS Mgt Frames
11ac -VHT>1 Gbps @ 5GHz
11ad - VHT>1 Gbps @ 60GHz
11afTV Whitespace
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802.11-2016
IEEE 802.11 Standards Pipeline
MAC & PHY
SponsorBallot
MAC
TIG/Study groups
PublishedStandard
WG Letter Ballot
802.11acVHT 5GHz
TG without Approved draft
Discussion Topics
PublishedAmendment
802.11afTVWS
802.11aiFILS
WNG
802.11aeQoS Mgt Frames
802.11adVHT 60 GHz
802.11aqPAD
802.11ajCMMW
802.11akGLK
802.11axHEW
802.11ayNG60
802.11aaVideo Transport
802.11-2012
14November 2015
802.11azNGPLRLP TIG
Long RangeLow Power
802.11ah< 1Ghz
PHY Project Sequence
100 Kbps
1 Mbps
10 Mbps
100 Mbps
1 Gbps
10 Gbps
100 Gbps
80 90 00 1085 95 05 15
10 yearyardstick
802.3
802.11
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802.11 Architecture Overview
Multiple Over the Air PHY optionsOne common MAC based on CSMA/CA
802.11 MAC
b g n ac ada af ah ax
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Summary of Completed 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
AC – Very High Throughput (<6GHz)
AD – Very High Throughput (60GHz)
AE – QoS for Management Frames
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Current Projects
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TGah
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TGah - Purpose
The purpose of this amendment defines operation of license-exempt IEEE 802.11 wireless networks in frequency bands below 1 GHz excluding the TV White Space bands.
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This amendment defines an Orthogonal Frequency Division Multiplexing (OFDM) Physical layer (PHY) operating in the license-exempt bands below 1 GHz, e.g., – 868-868.6 MHz (Europe), 950 MHz -958 MHz (Japan), 314-316 MHz, 430-434
MHz, 470-510 MHz, and 779-787 MHz (China), 917 - 923.5 MHz (Korea) and 902-928 MHz (USA),
– and enhancements to the IEEE 802.11 Medium Access Control (MAC) to support this PHY, and provides mechanisms that enable coexistence with other systems in the bands including IEEE 802.15.4 and IEEE P802.15.4g.
The data rates defined in this amendment optimize the rate vs range performance of the specific channelization in a given band.
This amendment also adds support for:– -transmission range up to 1 km– -data rates > 100 kbit/s– while maintaining the IEEE 802.11 WLAN user experience for fixed, outdoor,
point to multi point applications
TGah - Scope
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TGai
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This amendment defines mechanisms that provide IEEE 802.11 networks with fast initial link set-up methods which do not degrade the security currently offered by Robust Security Network Association (RSNA) already defined in IEEE 802.11. The project’s primary need comes from an environment where mobile users are constantly entering and leaving the coverage area of an existing extended service set (ESS).
(a) scale with a high number of users simultaneously entering an ESS (b) minimize the time spent within the initial link set-up phase(c) securely provide initial authentication.
TGai Purpose
02 Sept 2015Slide 23
Started in May 2010Completed Working Group Letter Ballot Process Sponsor Letter Ballot for Draft 6.0 – closes 13-Sep-2015
TGai Progress
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TGai Technical HighlightsAPSTA DHCP
Beacon/Probe Resp
Auth Req/Resp
AS
Association & IP addr
APSTA DHCP
Authentication
Association
EAPOL Key
DHCP
AS
EAP(PEAP/MSCHAPv2)
11i 11ai
Improved Scanning, FILS Authentication and higher layer setup established
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TGaj
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This amendment defines modifications to the IEEE P802.11ad Physical (PHY) layer and the Medium Access Control (MAC) layer to enable operation in the Chinese 59-64 GHz frequency band. The amendment maintains backward compatibility with 802.11ad when it operates in the 59-64 GHz frequency band.The amendment also defines modifications to the PHY and MAC layers to enable the operation in the Chinese 45 GHz frequency band. The amendment maintains the 802.11 user experience.
TGaj Purpose
02 Sept 2015
Started as a study group in January 2012Working towards initial letter of Draft 1.060 GHz fairly stable45 GHz portion of the draft nearly selected
TGaj Progress
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Technical Highlights
11aj is currently considering the following aspects:
• Link Budget Analysis for 40-50 GHz Indoor Usage
• Multi-Carrier Training Field for OFDM Transmission in the 45GHz
• Packet Encoding Solution for 45GHz
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TGak
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This amendment enables an 802.11 connection to be used as a through link in a general network, not just as a connection to an end station at the edge of a network.
• Fully general mixed 802.11 and wired plug and play in the home.
• Data Center top-of-rack to top-of-rack connections for overflow traffic.
• Industrial and Enterprise network use.
Purpose
02 Sept 2015Slide 31
General Link study group started in September 2012Proprietary implementations of General Link well establishedD1.0 Initial letter ballot:
– 437 comments to resolve
Progress
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TGaq
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Purpose
This amendment enables delivery of pre-association Service Discovery information by IEEE 802.11 stations (STAs).
• Printer discovery in a hotel• Pre-association protocol
designed to discover services on a WLAN
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Progress
Started November 2012Service Discovery concept appeared in Fall 2012Device discovery well establishedLetter Ballot 208 – D1.0
702 comments Resolved 293 technical and 1 editorial comments 43 technical remaining
Internal Review – Use D1.3 during August - September– Remove inconsistencies– Address missing issues
02 Sept 2015Slide 35
Container MAC protocol to carry upper layer service discovery protocols (e.g. UPnP, Bonjour)
Provisioning and configuration of services in the access point
– Service Transaction Proxy is a logical element connected to the access point
Universal identification of services– Using a hash name– Provide service attributes (e.g. 3D printer
capability or point of sale service)
Currently considering request/response or broadcast concept
Technical Highlights
AP1
AP2
STA
Network
Local Access Network Service
Transaction Proxy (TPX)
Pre-association Messages
Service Query Messages
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TGax
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Improve performance of WLAN deployments in dense scenarios
– Targeting at least 4x improvement in the per-STA throughput compared to 802.11n and 802.11ac.
– Improved efficiency through spatial reuse and enhanced power save techniques.
Dense scenarios are characterized by large number of access points and large number of associated STAs deployed in geographical limited region, e.g. a stadium or an airport.
Purpose
Access to Internet, latest airlines’ announcements, and digital media such as movies and sport events
02 Sept 2015Slide 38
The TG has started the development of the Specification Framework document
– A High level requirement document guiding the development of the 802.11ax detailed specification
Letter Ballot is planned for 1H 2016Task Group Documents – the latest revisions (as of May 27st, 2015)– 11-14-0165-01 PAR and 11-14-0169-01 CSD– 11-14-0938-04 TGax Selection Procedure– 11-14-0980-14 TGax Simulation Scenarios– 11-14-0571-10 TGax Evaluation Methodology– 11-14-0882-04 TGax Channel Models– 11-14-1009-02 TGax Functional Requirements– 11-15-0132-06 TGax Specification Framework (unapproved new version 11-15-0132-07 available)
Progress
02 Sept 2015Slide 39
Support multi-user (MU) transmissions both in the frequency and in the spatial domains
– Extend IEEE 802.11ac DL MU-MIMO to UL direction
– Introduce OFDMA PHY layer and the associated scheduling to ensure per STA throughput.
– MAC enhancements to support newly introduced mechanisms
– Compatible with legacy devices.
Technical Highlights20
MHz
PHYHeader
Time
Freq
Space
20 M
Hz
STA#10STA#35
STA#54STA#26
Sub-Band
OFDMA
STA #3
STA #8
STA #19
SS 1,2
SS 3,4,5
SS 6
MU-MIMO
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TGay
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Purpose
Expected to develop mode of operation capable of supporting a maximum throughput of at least 20 gigabits per second (measured at the MAC data service access point), while maintaining or improving the power efficiency per station.
Project Authorization Request (PAR) 11-14/1151r8
Critera for Standards Development (CSD) 11-14/1152r8
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Progress
New Task Group – Initial Task Group Meeting May 2015
July Session 14 presentations made
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Technical highlights
Current generation 60 GHz (802.11ad) achieves 7Gbps
Next Generation 60 GHz increases throughput, range and reliability
Technical approaches are likely to include channel bonding and MIMO
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TGaz
02 Sept 201545
Purpose
IEEE Std 802.11-2007 includes support for timing measurement.
When published, IEEE Std 802.11-2016/2017 will include “fine timing measurement” that allows location to determined to ~3m using 802.11n/802.11ac.
The Next Generation Positioning study group will improve location accuracy and scalability and will consider new usages such as directionality and ranging
Project Authorization Request (PAR) 11-15/30r8
Critera for Standards Development (CSD) 11-15/262r4
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Progress
Task group is considering inputs to usage models and other technical documents
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Standing Committees(SC)
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ARC SC
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As a Standing Committee (SC), the ARChitecture SC meets on an ongoing basis, to discuss various topics of an 802.11 architectural nature. Some examples:
• Architectural clauses and models in the standard, as questions, or needs for update or clarification arise.
• Relationships with outside groups on 802.11 architectural topics, or topics that don’t fit elsewhere, such as IETF, 802 O&A, and 802.1.
Purpose
02 Sept 2015Slide 50
Models for STA architecture and related concepts, and overall system architecture, included in the Standard in clauses 4 and 5, generally.
Evolution of the models, either to consider amendments to the Standard, or as clarification is needed
Define how 802.11 technologies fit into 802, 802.1 and IETF use cases.
Technical Highlights
Data Link Layer
Physical Layer
Non-AP STA Non-AP
STA
Non-AP STA
MAC Sublayer
802.1X Port Filtering (Optional)
MAC Sublayer
802.1X Port Filtering (Optional)
Portal
Integration
Non-802.11 network
PHY PHY
APs
Distribution System
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Regulatory SC
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Purpose
Wireless standards all depend on the availability of RF spectrum for their deploymentSpectrum allocations and rules vary worldwideThe massive growth of wireless applications is forcing regulators to make changesThe Regulatory SC provides IEEE 802.11 with information about spectrum availability and changesWhere needed, the group lobbies regulators for changes to accommodate new standards
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Study Groups
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Technical Interest Groups (TIG)
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Long Range Low Power (LRLP)
TIG Charter: Specify LRLP requirements and use cases Establish technical feasibility of achieving the
requirements for range, power consumption, and integration with 802.11 and coexistence with other 802 wireless protocols
Generate the technical material needed to initiate standardization
The TIG will generate a report containing the results of these tasks within four 802.11 sessions.
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