Doc.: IEEE 802.11-06/0651r0 Submission May 2006 Royce Fernald - Intel CorporationSlide 1 Video Delivery vs. Attenuation in a Conducted Environment Notice:

May 2006

Royce Fernald - Intel Corporation

Slide 1

doc.: IEEE 802.11-06/0651r0

Submission

Video Delivery vs. Attenuation in a Conducted Environment

Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.

Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.11.

Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures <http:// ieee802.org/guides/bylaws/sb-bylaws.pdf>, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair <[email protected]> as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at <[email protected]>.

Name Company Address Phone Email Royce Fernald Intel 5200 Elam Young Pkwy

MS:HF3-96 Hillsboro, OR 97124

503-696-4318 [email protected]

Uriel Lemberger

Intel Matam Industrial Park PO Box 1659 Haifa 31015 Israel

+972-4-865-5701

[email protected]

Alexander Tolpin Intel Matam Industrial Park PO Box 1659 Haifa 31015 Israel

+972-4-865-5430

[email protected]

Philip Corriveau Intel 5200 Elam Young Pkwy MS:HF3-96 Hillsboro, OR 97124


Fahd Pirzada Dell One Dell Way Round Rock, TX 78682


Fanny Mlinarsky Azimuth 31 Nagog Park, Acton, MA 01720


Authors:

May 2006


Slide 2

doc.: IEEE 802.11-06/0651r0

Submission

Abstract

This presentation defines the video delivery error rate (VDER) metric and outlines a method for measuring VDER in a conducted environment

This presentation corresponds to the draft text submission 802.11-06/0652r0

May 2006


Slide 3

doc.: IEEE 802.11-06/0651r0

Submission

Agenda

• Introduction and Purpose• Resource Requirements• Test Setup• Video Content Preparation and Analysis• Calibration• Baseline Configuration• Modifiers• Measurement Procedures• Reported Results• Motion

May 2006


Slide 4

doc.: IEEE 802.11-06/0651r0

Submission

Introduction and Purpose

• This test measures the video delivery error rate (VDER) of the path between a DUT and a WLCP at different attenuation levels

• VDER measures video delivery errors relative to the intended playback rate of a video stream

• VDER is objective, format independent and content independent

• VDER is expressed as the sum of the dropped, repeated and out-of-sequence video frames measured during the test

May 2006


Slide 5

doc.: IEEE 802.11-06/0651r0

Submission

Hardware Resource Requirements

• DUT and WLCP (reference client or reference AP)• Video traffic generator, a general purpose PC or

dedicated device that streams video content to the DUT• Video capture device, a PC or dedicated device capable

of connecting to the DUT display port and saving video data to non-volatile storage

• Power meter• Variable attenuator or channel emulator• Shield enclosures• Test controller

May 2006


Slide 6

doc.: IEEE 802.11-06/0651r0

Submission

Software Resource Requirements

• A video playback analysis application capable of instrumenting video content for the detection of dropped, repeated and out-of-sequence video frames

• A video encoder application for encoding test media in the required format

• A video capture application for capturing display data from the DUT

May 2006


Slide 7

doc.: IEEE 802.11-06/0651r0

Submission

Test Setup

May 2006


Slide 8

doc.: IEEE 802.11-06/0651r0

Submission

Video Content Preparation

• Video content must be instrumented by the video playback analysis application before it can be used for this test

• Instrumentation ensures content-independent results

• Uncompressed source content is first instrumented and then encoded in the desired test format before being loaded on the video traffic generator

May 2006


Slide 9

doc.: IEEE 802.11-06/0651r0

Submission

Video Content Analysis

• After passing through the RF data connection, video content is captured from the DUT display signal and saved as uncompressed video

• The instrumented video capture file is examined for dropped, repeated and out-of-sequence video frames by the video playback analysis application

May 2006


Slide 10

doc.: IEEE 802.11-06/0651r0

Submission

Calibration

• VDER tests require that the DUT support the video format, bitrate, network transport and streaming protocol used by the video traffic generator

• Video format compatibility must be verified before the test begins

• VDER measurements can be affected by the capture device, so capture device performance must be verified with local video playback from the DUT

• If there are too many errors detected during calibration, the capture device should not be used for VDER tests

May 2006


Slide 11

doc.: IEEE 802.11-06/0651r0

Submission

Baseline Configuration

• Maximum transmit power setting

• QoS enabled with video traffic at high priority (no background traffic)

• No security

• No power management

• Video traffic configured to model desired application (i.e. 8 Mbps MPEG2 for DVD-quality video)

• No content encryption

May 2006


Slide 12

doc.: IEEE 802.11-06/0651r0

Submission

Modifiers

• QoS disabled

• QoS enabled with background traffic at low priority

• MAC security

• Alternate video bitrates and/or network transports

• Video content encryption

May 2006


Slide 13

doc.: IEEE 802.11-06/0651r0

Submission

Measurement Procedure

• Load video content on the video traffic generator

• Associate DUT with WLCP

Repeat the following steps for each attenuation level:

• Start the video capture operation on the capture device and then start the video stream to the DUT

• After the specified test duration, stop the capture operation and then stop the video stream

• Analyze the resulting video capture file with the video playback analysis application to measure the video delivery error rate

May 2006


Slide 14

doc.: IEEE 802.11-06/0651r0

Submission

Reported Results

• The video delivery error rate is computed as the sum of the dropped, repeated and out-of-sequence video frames detected during the test per unit time

• The reported error rate is the measured rate minus the capture device baseline from the calibration stage

Attenuation (dB)

Setup Path Loss (dB)

WLCP Tx Power (dBm)

Rx Input Power (dBm)

Video Delivery Error Rate (Errors/minute)

Sample Report:

May 2006


Slide 15

doc.: IEEE 802.11-06/0651r0

Submission

Motion

Move to adopt the contents of document 802.11-06/0652r0 into the P802.11.2 draft.

Technical (75%)

Y:

N:

A:

May 2006


Slide 16

doc.: IEEE 802.11-06/0651r0

Submission

References

IEEE 802.11-06/0652r0 “Video Delivery versus Attenuation in a Conducted Environment”

IEEE 802.11-06/0144r1 “Video over Wireless Methodology”

IEEE 802.11-06/0321r0 “Video Gross Error Detector Video over Wireless Methodology”

Documents

Doc.: IEEE 802.11-06/0651r0 Submission May 2006 Royce Fernald - Intel CorporationSlide 1 Video Delivery vs. Attenuation in a Conducted Environment Notice: