September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 1

doc.: IEEE 802.11-09-0960-00-00ad

Submission

WirelessHD Specification and Coexistence Capabilities

Date: 2009-09-21

Authors:

Name Affiliations Address Phone Email

Jeyhan Karaoguz Broadcom, Chair WirelessHD Coexistence Study Group and IEEE 802 Standards Outreach

CA, USA 949-926-6168

jeyhan@broadcom.com

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 2

doc.: IEEE 802.11-09-0960-00-00ad

Submission

WirelessHD/802.11ad Coexistence Discussion

• This submission embodies the results of discussions that have taken place in the WirelessHD Consortium Coexistence Study Group. The document contains an overview of the WirelessHD Specification and coexistence recommendations for further discussion.

• This document is a formal liaison from the WirelessHD Consortium and has been approved by the WirelessHD Management Committee for release to 802.11ad TG.

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 3

doc.: IEEE 802.11-09-0960-00-00ad

Submission

Outline

• WirelessHD Overview– High-rate PHY

– Low-rate PHY

– Channel Plans

– Receiver Characteristics

– Antenna Directionality

– Primary Channel

• WirelessHD/802.11ad Co-existence Approaches • Recommendations and Further Discussion

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 4

doc.: IEEE 802.11-09-0960-00-00ad

Submission

WirelessHD Overview

• WirelessHD is a special interest group consisting of world leading product and technology companies defining specifications for worldwide multi-gigabit, 60GHz unlicensed millimeter wave technology for mobile and stationary, consumer and enterprise applications.

• The WirelessHD 1.0 specification was released in January 2008 and products from multiple manufacturers shipped worldwide in 2009.

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 5

doc.: IEEE 802.11-09-0960-00-00ad

Submission

WirelessHD Overview (2)

• This is an overview of major characteristics of the WirelessHD PHY for the purpose of channel planning, proposal development, and coexistence analysis. Topics covered in this submission include:– High-Rate PHY Design

– Low-Rate PHY Design

– Channel Plans

– Receiver Characteristics

– Antenna Directionality

– Primary Channel Design

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 6

doc.: IEEE 802.11-09-0960-00-00ad

Submission

High-Rate PHY Design

• WirelessHD supports a high-rate physical (HRP) layer mode that supports a multiple Gbps level of throughput

– The HRP has a transmit mask as follows:

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 7

doc.: IEEE 802.11-09-0960-00-00ad

Submission

Low-Rate PHY Design

• WirelessHD also supports a low-rate physical (LRP) layer mode that supports a multiple Mbps level of throughput

– The LRP has a transmit mask as follows:

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 8

doc.: IEEE 802.11-09-0960-00-00ad

Submission

Channel Plan

• Both the high-rate PHY (HRP) and low-rate PHY (LRP) modes operate in the 60 GHz range

– Up to 4 independent HRP channels and 12 independent LRP channels are supported, depending on the regulatory domain

• A given device may use HRP and/or LRP modes

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 9

doc.: IEEE 802.11-09-0960-00-00ad

Submission

Receiver Characteristics

• For the purpose of coexistence analysis, WirelessHD HRP and LRP receivers may be treated as separate cases

• HRP Receivers have a Rx sensitivity less than -50 dBm in their basic operating mode– The maximum HRP input level is at least -24 dBm

• LRP Receivers have a Rx sensitivity less than -70 dBm in their basic operating mode– The maximum LRP input level is at least -30 dBm

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 10

doc.: IEEE 802.11-09-0960-00-00ad

Submission

Typical Antennas Characteristics

• Antenna designs are implementation specific

• HRP operates in a beam steered mode– Both TX and RX antennas are adjusted to improve the link

– Typical gain for TX or RX is 10 to 20 dBi

• LRP operates in a near omni-directional mode

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 11

doc.: IEEE 802.11-09-0960-00-00ad

Submission

Primary channel

• WirelessHD implementations do not have to support all four HRP channels.

• Support of only one HRP channel is required– Called the primary channel

– Defined as channel #2

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 12

doc.: IEEE 802.11-09-0960-00-00ad

Submission

WirelessHD/802.11ad Co-existence Approaches

• Common Channelization• Passive Channel Scanning• Dynamic Channel Selection

– Channel signal quality info, network/traffic priority info sharing/notification

• Default Channel• Energy Detect• Signal/Preamble Detect and Correlation• MAC/PHY Level Coordination• Spatial Separation/Beamforming Coordination

September 2009

J. Karaoguz, Broadcom, Chair WirelessHD Coex SG

Slide 13

doc.: IEEE 802.11-09-0960-00-00ad

Submission

Coexistence Recommendations for Further Discussion

• Common Channelization• Passive Channel Scanning• Dynamic Channel Selection

– Quality measurement report sharing between devices conforming to the same specification

• Energy Detect– Avoidance when energy TBD dB detected above minimum sensitivity

• Signal/Preamble Detection– Partial detection on preamble to enhance dynamic channel selection (more

analysis required)

• Any coexistence requirements based on PHY/MAC level coordination of control frames are too costly and complex to manage