Doc.: IEEE 802.11-98/54 Submission March 1999 Jim Lansford, IntelSlide 1 HomeRF: Bringing Wireless Connectivity Home Jim Lansford Wireless Systems Architect

March 1999

Jim Lansford, IntelSlide 1

doc.: IEEE 802.11-98/54

Submission

HomeRF: Bringing Wireless

Connectivity Home

Jim LansfordJim LansfordWireless Systems ArchitectWireless Systems ArchitectIntel CorporationIntel CorporationTechnical Committee ChairTechnical Committee ChairHome RF Working GroupHome RF Working Group

March 9, 1999March 9, 1999

March 1999


doc.: IEEE 802.11-98/54

Submission

Where does wireless fit? Part of the home intranet mixPart of the home intranet mix

Why wireless? Portability and “No new wires”Why wireless? Portability and “No new wires”

• Core home networking capabilities, including internet, anywhere in and around the home

• Share wireless voice and data

• Review incoming messages

• Activate other home electronic systems by voice

• Needed in countries where phone lines cannot be used

March 1999


doc.: IEEE 802.11-98/54

Submission

“No new wires”Simple to InstallEasy to UseLow Cost: ~$200 for 2 PCs

Bandwidth To Support Common Home Applications

Industry Standards

Home Networking Solutions Designed for the Home User

March 1999


doc.: IEEE 802.11-98/54

Submission

Home Networking Needs 1 Mbps

1

100,000

10

100

1,000

10,000

Pri

nti

ng

Inte

rne

t

Dri

ve

s

Ga

min

g

Vo

ice

Re

al A

ud

io G

2

MP

3 A

ud

io

MP

EG

Vid

eo

HD

TV

Ban

dw

idth

(K

bp

s)(100 Mbps)

(10 Mbps)

(1 Mbps)

First Home NW First Home NW ApplicationsApplications

March 1999


doc.: IEEE 802.11-98/54

Submission

HomeRF™ Working Group Mission Statement

To enable the existence of a broad range of interoperable consumer devices, by establishing an open industry specification for unlicensed RF digital communications for PCs and consumer devices anywhere, in and around the home.

March 1999


doc.: IEEE 802.11-98/54

Submission

Establishing SWAP-CA

It happened one dayIt happened one daye.g. ISA, Soundblastere.g. ISA, Soundblaster

Standards bodyStandards bodye.g., ITU, IEEE, ANSIe.g., ITU, IEEE, ANSI

Industry leadershipIndustry leadershipand dedicated forumand dedicated forume.g., IrDA, TAPI, USBe.g., IrDA, TAPI, USB SWAP-CASWAP-CA

Shared Wireless Access Protocol - Cordless AccessShared Wireless Access Protocol - Cordless Access

March 1999


doc.: IEEE 802.11-98/54

Submission

Broad, cross industry support• Communications• Consumer Electronics• Home Control/Home Automation • Networking• Peripherals• Personal Computer• Semiconductors/Components• Software

70+ Member Companies

March 1999


doc.: IEEE 802.11-98/54

Submission

Partial Membership Roster(70+ companies are now Participants)

• 3COM• Alps• Advanced Micro Devices• Aironet• Apple• Broadcom Corporation• Butterfly Communications• Casio• Cirrus Logic• Cisco Systems• Compaq• Ericsson Enterprise

Networks• Fujitsu • Harris Semiconductor• Hewlett-Packard • Hosiden • IBM

• Primax• Philips Consumer

Communications (PCC)• Proxim• Raytheon Wireless Solutions• RF Monolithics• RF Micro Devices• Rockwell Semiconductor

Systems• Samsung Electronics• Sharp• ShareWave• Siemens• Siemens Microelectronics • Silicon Wave• Symbionics• Symbol• Texas Instruments• WebGear

IntelIntelIntellonIntellonInterval ResearchInterval ResearchIndustrial Tech. ResearchIndustrial Tech. ResearchiReady SystemsiReady SystemsKansai DenkiKansai DenkiLG ElectronicsLG ElectronicsMatsushita ElectronicsMatsushita ElectronicsMatsushita WorksMatsushita WorksMicrosoftMicrosoftMitsubishiMitsubishiMotorolaMotorolaNational SemiconductorNational SemiconductorNEC Corporation NEC Corporation NortelNortelOkiOkiOsitis SoftwareOsitis Software

March 1999


doc.: IEEE 802.11-98/54

Submission

SWAP Product Development

• Butterfly Communications

• Compaq

• Hewlett-Packard

• IBM

• Intel

• iReady

• Microsoft

• Motorola

• Proxim

• OTC Telecom

• RF Monolithics

• Samsung

• Symbionics

The following member companies are The following member companies are developing SWAP products:developing SWAP products:

March 1999


doc.: IEEE 802.11-98/54

Submission

Enabling the Vision

PrinterPrinterCameraCamera Game PadGame Pad

USBUSB

StereoStereo CamcorderCamcorder VCRVCR TVTVMultimedia (e.g. 1394)Multimedia (e.g. 1394)

Grandma’s Brownies3 cups flour1 cup grated chocolate1 cup sugar1 stick butterHomeRF SWAPHomeRF SWAP

Control Point

HomePNAHomePNA

Phone

Cable13941394

doc.: IEEE 802.11-98/54

Submission

Slide 11 Jim Lansford, Intel

March 1999 The SWAP Network

Other Home Networks Other Home Networks (HPNA,phone,AC)(HPNA,phone,AC)

TCP/IP Based TCP/IP Based Network of Network of

Asynchronous Asynchronous Peer-Peer Peer-Peer DevicesDevices

Main Home PCMain Home PC

\65

\60m

m

Isochronous ClientsIsochronous Clients

Grandma’s Brownies3 cups flour1 cup grated chocolate1 cup sugar1 stick butter

PSTNPSTNHomeRFHomeRFControl PointControl Point

USBUSB

InternetInternet

March 1999


doc.: IEEE 802.11-98/54

Submission

HomeRF Origins802.11802.11

Uses CSMA/CAUses CSMA/CAGood for DataGood for Data

DECTDECTUses TDMAUses TDMA

Good for VoiceGood for Voice

SWAPSWAPTDMA + CSMA/CATDMA + CSMA/CA

Good for Voice & DataGood for Voice & DataOptimized for small networks (in home)Optimized for small networks (in home)

Simplified radio & protocol to reduce costSimplified radio & protocol to reduce cost

Both voice and data are important for Both voice and data are important for home RFhome RF

Both voice and data are important for Both voice and data are important for home RFhome RF

March 1999


doc.: IEEE 802.11-98/54

Submission

Why a new protocol?

• It handles voice like DECT or PHS, but...– Frequency hopping– 20 ms frames (better for data)– interleaved up and down links– Retransmission (single)

• It handles data like 802.11, but...– Relaxed PHY layer specs to reduce cost– Beacons to manage isochronous traffic– Simplified protocol (no PCF)

•IP data at up to 2Mb/s and supports cordless telephony•IP data at up to 2Mb/s and supports cordless telephony

March 1999


doc.: IEEE 802.11-98/54

Submission

SWAP Features

• Range: >50 meters indoors

• Speed: dual speed - supports TCP/IP traffic at over 1Mb/s

• Voice: High quality voice channels with retransmission– High quality cordless telephones– Voice recognition

March 1999


doc.: IEEE 802.11-98/54

Submission

Device Types

Cordless TelephoneCordless Telephone

Isochronous (I node)Isochronous (I node)> minimum latency -> minimum latency -telephones, etc.telephones, etc.

Asynchronous (A node)Asynchronous (A node)> TCP/IP traffic> TCP/IP traffic

Fridge padFridge pad

Grandma’s3 cups flour1 cup grated chocolate1 cup sugar1 stick butter1/2 cup chopped walnutsminutes.

HOME INDEX

•CP - Connection point…can manage a CP - Connection point…can manage a network or act as an A nodenetwork or act as an A node

• Can be Can be USBUSB, PCI, PC-Card, Device Bay, etc., PCI, PC-Card, Device Bay, etc.• CP can place calls even when PC is downCP can place calls even when PC is down

CPCPCPCP

PSTNPSTN

March 1999


doc.: IEEE 802.11-98/54

Submission

Topology

CPCP

Connection Point*Connection Point*

PSTNPSTN

SWAP FrameSWAP Frame

• It’s a circuit switched, isochronous network

TDMATDMAI NodeI Node TDMATDMA

I NodeI Node

TDMATDMAI NodeI Node

CPCP

CSMACSMAA NodeA Node

Fridge pad


HOME INDEX


CPCP



• It’s a packet switched, asynchronous network

HOME INDEX

CSMA & TDMACSMA & TDMAA/I NodeA/I Node

• It’s both - I nodes get priority on bandwidth

March 1999


doc.: IEEE 802.11-98/54

Submission

• Nominal 100 mW transmit power• Minimum receiver sensitivity of -76 dBm (2FSK)

– range >50 m in typical homes/yards

– -85 dBm sensitivity typical

• Cost effective filter requirements– Use MAC to reduce PHY cost

– Makes single-chip integration simpler

PHY Features

March 1999


doc.: IEEE 802.11-98/54

Submission

• MAC provides good support for voice and data

• Leverages existing DECT technology for voice

• Excellent integration with TCP/IP networking protocols– easy integration with Ethernet

– Supports broadcast, multicast and fragmenting

• Data security - Basic/Enhanced levels of encryption– Basic: 24-bit Network ID and Frequency Hopping

– Enhanced: Basic + LFSR algorithm

• Extensive power management for ultra-portable devices

MAC Features

Optimizes existing technology for home useOptimizes existing technology for home use

March 1999


doc.: IEEE 802.11-98/54

Submission

The PC interface• SWAP’s PC connection is designed for use under Windows

98* , Windows2000*, and beyond– Wake on ring– Connection Oriented NDIS (NDIS 5…for Windows2000*)– A nodes appear as Ethernet devices– I nodes become Connection Oriented clients

* Third party brands and marks are * Third party brands and marks are property of their respective owners.property of their respective owners.

March 1999


doc.: IEEE 802.11-98/54

Submission

PC Software Architecture Diagram

RCA filterNDIS TAPI proxy

TAPI 3.0 connection-oriented client

connection-less clientDirectShow**

“Ethernet”MP/CM

connectionless I/Fconnection-oriented I/F

Windows2000Windows2000**



* Third party brands and marks are * Third party brands and marks are property of their respective owners.property of their respective owners.

March 1999


doc.: IEEE 802.11-98/54

Submission

Voice: Robust clarity• Service Slot used by nodes to

Page Control PointControl Point Beacon

B Contention periodCSMA/CA access mechanism

Ho

p

Service Slot

• Superframe structure controlled by BeaconSuperframe structure controlled by Beacon

Superframe - 20msSuperframe - 20ms

Ho

p

Uplink Slots

Downlink Slots

• TDMA slot pairs allocated by the Control PointTDMA slot pairs allocated by the Control Point

D2

U3

D3

U2

D1

U1

• Voice data transmitted in the slots in CFP #2Voice data transmitted in the slots in CFP #2

D4

U4

D2

U3

D3

U2

D1

U1

CFP #2CFP #2Contention free periodsContention free periods

• Any voice data to be retransmitted is sent:Any voice data to be retransmitted is sent:– In CFP1, after a hopIn CFP1, after a hop– frequency/time diversity & low latencyfrequency/time diversity & low latency

D3 D4

U3 U4

CFP #1CFP #1

March 1999


doc.: IEEE 802.11-98/54

Submission

Data transmission

• CSMA/CA during the contention period CSMA/CA during the contention period • Efficient for small networksEfficient for small networks• Tolerant of interferenceTolerant of interference• Data for entire frame if no voiceData for entire frame if no voice

Service Slot

Contention periodCSMA/CA access mechanism

Ho

p

Superframe - 20msSuperframe - 20ms

B D3 D4

U3 U4

D4

U4

D2

U3

D3

U2

D1

U1

Ho

pD2

U3

D3

U2

D1

U1

CFP #2CFP #2CFP #1CFP #1Contention free periodsContention free periods

March 1999


doc.: IEEE 802.11-98/54

Submission

Encryption Algorithm

• Open, royalty free - published in open literature over 30 years ago

• Low gate count

• Fast “warm up”

• Required for CP in the US market, optional for other devices and geographies

• Robust

• Similar concept to GSM A5 algorithm, but “stronger”

March 1999


doc.: IEEE 802.11-98/54

Submission

Usage - Voice Control

CP IWU Co-NDIS

Application

PCCP

PSTN


Fridge pad


HOME INDEX

CSMAA Node

• Handset initiates voice Handset initiates voice transfer to PCtransfer to PC

• Application accepts Application accepts streaming audio from CPstreaming audio from CP

• Application performs speech Application performs speech recognition and sends recognition and sends commands back down stackcommands back down stack

• For automatic call For automatic call placement, CP dials number placement, CP dials number and connects handsetand connects handset

• Handset - PSTN Handset - PSTN connection remains until connection remains until call teardowncall teardown

Data traffic can also be active

March 1999


doc.: IEEE 802.11-98/54

Submission

Usage - ISP Sharing


Fridge pad


HOME INDEX


CSMAA Node

CP IWU Co-NDIS

Application

PCCP

PSTNPSTN

• PC initiates ISP connection PC initiates ISP connection (modem, ISDN, UDSL, Cable, etc.)(modem, ISDN, UDSL, Cable, etc.)

• Applications on host PC can Applications on host PC can access ISP immediatelyaccess ISP immediately

• Remote A nodes access ISP Remote A nodes access ISP through NAT and TCP/IPthrough NAT and TCP/IP

• Remote A nodes can also Remote A nodes can also share files and printersshare files and printers

• Ad hoc peer-peer transfers Ad hoc peer-peer transfers between nodes do not require between nodes do not require resources of “server” PCresources of “server” PC

USB

Voice traffic can also be activeVoice traffic can also be active

March 1999


doc.: IEEE 802.11-98/54

Submission

Timeline

Home RF W

orking Group Announced

Home RF W

orking Group Announced

Published R0.5 (Functionally complete)

Published R0.5 (Functionally complete)

Reached 50 mem

bers

Reached 50 mem

bers

‘‘9898Q1Q1

‘‘9898Q2Q2

‘‘9898Q3Q3

‘‘9898Q4Q4

‘‘9999Q3Q3

‘‘9999Q2Q2

Sample Physical Layer radios

Sample Physical Layer radios

Define Logo Usage Requirements

Define Logo Usage Requirements

‘‘9999Q1Q1

SWAP 1.0 Provisional Specification

SWAP 1.0 Provisional Specification

‘‘99992H2H

First Products

First Products

SWAP 1.1 Specification

SWAP 1.1 Specification

www.homerf.org

March 1999


doc.: IEEE 802.11-98/54

Submission

What about “Firefly”?“Home-RF lite”

• Market Requirements Document phase• MRD is at 0.5 rev level• When MRD is approved (May?), goes out for

technical proposals– Off the shelf technology proposals– Spec team will convert proposal to final specification

• What is it?– Ultra low cost– Oriented toward toys, peripherals, control devices

March 1999


doc.: IEEE 802.11-98/54

Submission

HomeRF Summary

• Home RF Working group developing open, royalty free spec

• Over 80 member companies

• NOW is the time to begin implementation plans

• More info (including membership) at www.homerf.org

• $4,800 membership fee

Documents

Doc.: IEEE 802.11-98/54 Submission March 1999 Jim Lansford, IntelSlide 1 HomeRF: Bringing Wireless Connectivity Home Jim Lansford Wireless Systems Architect