doc.: IEEE 802.11-11/0168r2

Submission

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 1

Joint Meeting with 802.1AVB

Date: 2011-03-06

Name Affiliations Address Phone email Venkatesan, Ganesh

2111 NE 25th Ave. Hillsboro OR 97229

503 334 6720 Ganesh.venkatesan@intel.com

Authors:

doc.: IEEE 802.11-11/0168r2

Submission

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 2

AbstractTopics proposed for joint discussion in Nov 2011 (Dallas) Meeting:

• Specific details on 802.11k/v traffic stream statistic reports

• Overview of 802.11aa•MaxRes for 802.11•How to deal with STA-Bridge issue?

doc.: IEEE 802.11-11/0168r2

Submission

Specific details on 802.11k/v traffic stream statistic reports

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 3

Triggered Autonomous Reporting (10.11.8)STA Statistics Report (11k/11v)Traffic Stream/Category Measurement Report (11v)

Need to add details: what are the required capabilities of the devices?what parameters can triggers be set on?what frames are used to set triggers?what reports are generated?

doc.: IEEE 802.11-11/0168r2

Submission

Traffic Stream/Category Measurement

• Need support for RadioMeasurement and TriggeredTrafficStreamCategoryMeasurement

• Cl. 8.4.2.23.11, 8.4.2.24.11 and 8.10.11.9.8 in P802.11-REVmb 7.0

• Higher Layer Stream ID and 802.11 TS ID mapping established when reservation is made

• Triggers set in Request

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 4

doc.: IEEE 802.11-11/0168r2

Submission

RRM- Traffic Stream/Category Request

• Traffic Identifier identifies the Traffic Stream corresponding to the Higher Layer Stream ID.

• Triggers can be – Average Error – number of dropped MSDUs exceeds threshold

– Consecutive Error – number of consecutive MSDUs dropped exceeds threshold

– Delay – number of MSDUs that exceeded the delay threshold

– Count

– Time-out

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 5

doc.: IEEE 802.11-11/0168r2

Submission

RRM- Traffic Stream/Category Report

• Report includes– Reporting Reason: which trigger caused the report to be generated

– Number of MSDUs transmitted, failed, discarded, retried

– Average Queue Delay

– Delay histogram

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 6

doc.: IEEE 802.11-11/0168r2

Submission

QoS Maintenance

• Other parameters/features?– Maintenance report on multicast streams?

• If other parameters are needed 802.11 needs to be amended – New changes in P802.11aa

– Need to determine these parameters (if any) soon

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 7

doc.: IEEE 802.11-11/0168r2

Submission

802.11aa Overview

• History

• Demo of GCR-BA and OBSS in action

• Overview of the features

• Timeline

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 8

doc.: IEEE 802.11-11/0168r2

Submission

History• Pre-Study Group formation

– Amending 802.11 to better suit streaming needs were discussed in several WNG sessions

– A 802 tutorial was sponsored by Stuart Kerry in the March 2007 plenary (Orlando, Fl) meeting

– A WNG presentation to 802.11 was made in the March 2007 plenary (Orlando, Fl) meeting

– A Video Transport Stream SG was approved by the 802.11 WG (and eventually by the 802 EC). The first SG meeting was in May 2007 (Montreal).

• The SG worked on PAR (Project Authorization Request)/5C (5 Criteria)– PAR/5C was approved by the WG in Jan 2008 (Taipei) and re-affirmed in Mar

2008 (Orlando, Fl).

• 802.11aa met for the first time in May 2008 (Jacksonville, Fl)

• Draft 1.0 balloted June 2010 (756 -78.32% approval) – 31 No Voters

• Draft 2.0 balloted Nov 2010 (327 - 79.19% approval) – 32 No Voters

• Draft 3.0 balloted Feb 2011 (421 - 81.52% approval) – 29 No Voters

Mar 2011

9 Ganesh Venkatesan, Intel Corp.

doc.: IEEE 802.11-11/0168r2

Submission

Demo of 802.11aa features

• GCR BA

• OBSS

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 10

doc.: IEEE 802.11-11/0168r2

Submission

Scope (802.11aa feature)

This amendment specifies enhancements to the 802.11 MAC (Medium Access Control)for robust audio video streaming, while maintaining co-existence with other types of traffic. The MAC enhancements specified in this amendment enable: .–Graceful degradation of audio video streams when there is insufficient channel capacity, by enabling packet discarding without any requirement for deep packet inspection (SCS),–Increased robustness in overlapping BSS environments, without the requirement for a centralized management entity (OBSS), –Intra-Access Category prioritization of transport streams by modifying EDCA timing and parameter selection without any requirement for deep packet inspection (SCS), –Improved link reliability and low jitter characteristics for multicast/broadcast audio video streams (GATS), –Interworking with relevant 802.1AVB mechanisms (802.1Qat, 802.1Qav, 802.1AS) (Interworking)

Mar 2011

11 Ganesh Venkatesan, Intel Corp.

doc.: IEEE 802.11-11/0168r2

Submission

Stream Classification Service (SCS)

Two Modes:

• Frames belonging to a Traffic Streams– Prioritization using Alternate Access Category and mapping to

802.1Qav traffic shaping policies

– DEI defined for a stream using Intra Access Category Prioritization element

– TCLAS and TCLAS processing elements

• Frames belonging to a User Priority– Drop Eligibility Indicator (DEI) in the MAC header corresponding

to data frames carrying the stream payload

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 12

doc.: IEEE 802.11-11/0168r2

Submission

Stream Classification Service (SCS)

• STA sets up SCS with the AP using SCS Request

• TCLAS, TCLAS processing elements and Intra AC Prioritization element describe the stream that is subject to this service– Frames from the STA

belonging to the stream and – with the same UP not

belonging to the stream are subject to this service

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 13

doc.: IEEE 802.11-11/0168r2

Submission

Group Address Transmission Service

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 14

• 802.11v Directed Multicast Service– Converts multicast to unicast

• GroupCast with Retries– Unsolicited retries

– BlockAck

• DMS Request/Response Action Frames are used to set up DMS/GCR service– Includes TSPEC, TCLAS and TCLAS processing elements

• Groupcast Delivery (Service Periods)– Multiple delivery instances of Groupcast frames within a Beacon

Interval

– Continuous Service Period

doc.: IEEE 802.11-11/0168r2

Submission

Group Addressed Transmission Service

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 15

doc.: IEEE 802.11-11/0168r2

Submission

Interworking with 802.1AVB (802.1Qat)

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 16

• ADDTS Reserve Response replaces ADDTS Complete action frame

• MLME-ADDTS RESERVE Confirm is either• Immediate when

invalid parameters are detected by he MLME, or

• At the end of the procedure reflecting the contents of the ADDTS Reserve Response action frame contents.

doc.: IEEE 802.11-11/0168r2

Submission

Overlapping BSS

• OBSS – BSSs that are operating in the same channel and are within radio range of each other

• Provides mechanisms for BSSs that are in range of each other to exchange information on QoS Load within a BSS and composite QoS Load on BSSs adjacent to the reporting BSS– Addresses both EDCA-AC and HCCA

• Recommend how this exchanged information can be used to– Find the best operating channel

– Co-operatively share the medium to maximize network performance

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 17

doc.: IEEE 802.11-11/0168r2

Submission

Timeline

► Form Sponsor pool – May 2011 80% approval from members 31 NO voters

• MEC Done – Aug 2011• Start Sponsor Ballot – Sep 2011 (need > 90% approval)• First Sponsor Recirc – Nov 2011• Sponsor Ballot done (final WG approval) – Mar 2012• Final or conditional 802 EC approval – Mar 2012• RevCom/SA approval -- June 2012 (lined up with

appropriate RevCom/SA meeting dates)

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 18

doc.: IEEE 802.11-11/0168r2

Submission

MaxRes for 802.11

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 19

Reference: http://www.ieee802.org/1/files/public/docs2010/avb-kbstanton-rate-adaptation-over-802-11-11-2010.pdf

How to determine • when there is enough bandwidth to admit new traffic

and • when the available bandwidth is not sufficient to

sustain currently admitted traffic

doc.: IEEE 802.11-11/0168r2

Submission

STA-Bridge

Mar 2011

Ganesh Venkatesan, Intel Corp.Slide 20

• Reference: http://www.ieee802.org/1/files/public/docs2008/avb-nfinn-802-11-bridging-0308-v3.pdf • There is consensus that this is not within the scope of

801.11aa• The request from 802.1AVB is how can we move forward

on this topic?• Present to WNG and start a new .11 SG/TG?• Work on Use Case document to demonstrate that there

are common scenarios where not solving this issue hampers proliferation of .11/.1AVB technologies?• An assessment (~20 months ago) concluded that this

problem is not worth solving.