doc.: ieee 802.11-11/0184r0 submission january 2011 rolf de vegt (qualcomm)) slide 1 802.11ah spec...

doc.: IEEE 802.11-11/0184r0

Submission

January 2011

Rolf de Vegt (Qualcomm))Slide 1

802.11ah Spec Development Discussion Document

Date: 2010-11-08

Name Affiliations Phone email Rolf de Vegt Qualcomm, Inc +1 408 533 9545 [email protected]

Authors:

doc.: IEEE 802.11-11/0184r0

Submission

Contents

• Context and Introduction• Learnings from past .11 projects that address PHY and

MAC elements• Example of the 802.11ac Process• Unique Characteristics of 802.11ah• Topics to be addressed regarding .11ah proposal

development• Strawpolls

January 2011

Rolf de Vegt (Qualcomm)Slide 2

doc.: IEEE 802.11-11/0184r0

Submission

Context and Introduction

• Taskgroup 802.11ah is chartered to develop an Industry Standard specification that is projected to enable a number of new, high volume use cases for 802.11 technology

• Up to this point there has been limited discussion amongst taskgroup members about:– The process to be followed for achieving wide industry support /

consensus about a specification– The foundational documents required for the development of a

successful industry standard

• This document provides a point of view regarding spec development processes and a series of strawpolls to assess taskgroup sentiment on this topic

January 2011


doc.: IEEE 802.11-11/0184r0

Submission

Learnings from other standards groups developing PHY / MAC standards

• Taskgroups typically develop a common understanding of the process to be followed for the development of a specification, prior to the commencement of actual spec development work

• Taskgroups typically adopt a channel model document and a functional requirement documents prior to considering proposal submissions

• The process of continuous down selects of competing proposals that has historically been followed has contributed to considerable delays in the standardization process due to stalemated debates between competing proposal groups

January 2011


doc.: IEEE 802.11-11/0184r0

Submission

Overview of .11ac Spec Development Process

January 2011


Usage Models

Channel Models

Functional Requirements*

SpecificationFramework

SufficientSupport forFramework?(50%? or 75%?)

Y

N

Contributionsand Decision

Making on Spec Element(s)

Draft SpecComplete andCoherent Enoughfor Letter Ballot?75%?)

Y

N

75% Letter Ballot

* Functional requirement document to include System Level Performance Targets and Simulation InstructionsNote: This proposal does not foresee any changes to the subsequent steps in the IEEE procedure (Letter Ballots, Sponsor Ballots)

Usage Models

Channel Models

Functional Requirements*

SpecificationFramework

SufficientSupport forFramework?(50%? or 75%?)

Y

N

Contributionsand Decision

Making on Spec Element(s)

Draft SpecComplete andCoherent Enoughfor Letter Ballot?75%?)

Y

N

75% Letter Ballot

* Functional requirement document to include System Level Performance Targets and Simulation InstructionsNote: This proposal does not foresee any changes to the subsequent steps in the IEEE procedure (Letter Ballots, Sponsor Ballots)

Source: 11-9/0059r6

doc.: IEEE 802.11-11/0184r0

Submission

Sample Content of Spec Framework Document

• The .11ac Spec Framework document (11-09/0992r21) has been updated by TGac Motion as the addition of new functionality has obtained sufficient support

• Sample Content of the Spec Framework Document:

A VHT mixed format (MF) preamble shall be supported in the draft specification and device support is mandatory. The VHT mixed format preamble shall have the following characteristics:

R3.2.1.A: Robust legacy 11a deferral. The VHT MF preamble shall be designed such that a legacy 11a device will defer for the duration of the transmission to the same degree that it does for an HT MF preamble.

R3.2.1.D: The VHT MF preamble shall include training for

a wider channel

1 to 8 spatial streams (see Section 3.4)

DL MU-MIMO

R3.2.1.E: Since the HT SIG field cannot be expanded without breaking backward compatibility, the VHT MF preamble shall include VHT SIG fields. The VHT SIG fields may include signaling for the following:

a) wider bandwidth

b) enhanced MCS (see Section 3.3)

c) more spatial streams (see Section 3.4)

January 2011


doc.: IEEE 802.11-11/0184r0

Submission

Unique Characteristics of 802.11ah • TGah has participants from various backgrounds, with different

experiences regarding spec development processes – E.g. 802.11, 15.4, new participants

• The unique use cases that are being discussed drive significantly different requirements from ‘traditional Wi-Fi’– ‘Thousands of STA’s per BSS’– Short, bursty traffic at large time intervals– Extreme low power consumption– Range up to 1km, outdoor– Relatively narrow frequency band

• Significantly different propagation characteristics than traditional 2.4 and 5 GHz Wi-Fi– Frequency band– Outdoor usage

January 2011


doc.: IEEE 802.11-11/0184r0

Submission

Topics to be addressed by TGah

• Establishing taskgroup consensus around a spec development process to be followed

• Determine whether the taskgroup will develop a Usage Model document

• Determine whether the taskgroup should develop and maintain a Channel Model document

• Determine whether the taskgroup should develop a Functional Requirements document

• Determine whether spec development should occur after consensus has been reached on Channel Model and Functional requirements, or in parallel

January 2011


doc.: IEEE 802.11-11/0184r0

Submission

Strawpolls (Yes/No/Abstain)

1. TGah shall develop and adopt a Specification Development process (aka ‘Selection Procedure’) document (56/0/2)

2. TGah shall develop and adopt a Usage Model document (58/0/0)

3. TGah shall develop and adopt a Channel Model document – no one indicates they want to vote ‘no’

4. TGah shall develop and adopt a Functional requirements document (41/0/18)

5. TGah shall adopt Draft specification text after the taskgroup has adopted a Spec Development process document, Functional Requirements document and Channel Model document (34/7/12)

January 2011


doc.: IEEE 802.11-11/0184r0

Submission

Motion

• TGah shall develop and adopt a Specification Development Process document

• Move: Rolf de Vegt• Second: Paul Lambert

Motion passes unanimous consent

January 2011


doc.: ieee 802.11-11/0184r0 submission january 2011 rolf de vegt (qualcomm)) slide 1 802.11ah spec...

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