Home Phoneline Networking and Compatibility with xDSL and Other Services

HomePNA Spectral Environment ¡ HomePNA Specification Overview ¢ Compatibility

£ Voice Terminals (Telephones, Fax/)

¤ G.lite/G.992.2

¥ G.dmt/G.992.1

¦ G.VDSL

08/06/99 DPS

xDSL Local Loop Environment and HomePNA

HomePNA G.lite POTS

ADSL

ISDN VDSL

HDSL

10 kHz 100 kHz 1 MHz 10 MHz 100 MHz

08/06/99 DPS Home Phoneline Networking and xDSL

OC-3 ATM

OC-3 ISP DSLAM Internet

Line POTS LLininee CCaarLdridnsse Local CCaardrdss IP over ATM PSTN PSTN over ADSL

splitter

Existing phone wire Analog VoIP New Cat 5 wire Phones Phones HomePNA G.dmt/T1.413 - 640 Kbps Up - 6 Mbps Down G.lite LAN - 384 Kbps Up xDSL - 1.5 Mbps Down Gateway/Router 08/06/99 DPS

HomePNA Overview § General

¨ Operates on same phone wire pair as telephone handsets, voiceband modems, and splitterless xDSL

© Plug and play

1.0 Mbps standard devices on the market now, 10 Mbps coming HomePNA 1.0

Disclosed portions of specifications to ITU, T1E1

Operates from 5.5 MHz to 9.5 MHz

 Uses standard 802.3 MAC

 Operates at 1.0 Mbps  HomePNA 2.0

 Will operate at 10 Mbps, equivalent to 10baseT  G.pnt (phoneline network transceiver)

 International standardization has begun

 VDSL - HomePNA spectral compatibility is the critical issue 08/06/99 DPS HomePNA Standardization

 Home Phoneline Networking Alliance (HomePNA) was formed in 2Q98

 11 founders: HP, 3COM, IBM, Lucent, Epigram/Broadcom, Tut Systems, Conexant, AMD, Compaq, AT&T , Intel

 22+ Participating companies including TI

 35+ Adopter companies  HomePNA 1M8 1.0 Mbps

 Products on market: Diamond MM, Tut Systems, AMD, Intel, …

 Specification partially disclosed to external standards bodies  Next generation HomePNA will support 10 Mbps

 Backward compatibility

08/06/99 DPS

Relationship to OSI Model

Application Higher Layers Higher Layers

Logical Link Control Logical Link Control Presentation (LLC) (LLC)

Session Media Access Control Media Access Control (802.3 MAC) (802.3 MAC) Transport Home PNA PHY Home PNA PHY Network (1M8PHY) (1M8PHY)

Data link Wiring Physical Wire Pair network

08/06/99 DPS HomHoemPeNPAN AT rTarannssmmit MMaasskk 7 .75 .M5 hMz Hz

1.5

1

0.5

0 0.00E+00 2.00E-07 4.00E-07 6.00E-07 8.00E-07 1.00E-06 1.20E-06 -0.5

-1

-1.5

 7.5 MHz, 4-cycle square wave via 5-pole Butterworth filter 5.5 MHz to 9.5 MHz Pulse position modulation at 1.0432 Mbps

08/06/99 DPS

Power Spectral Levels

Power Mode Max Min MAX MAX MAX PSD INBAND attenuation PSD PSD above 40 _PSD at > +/- 3.5 below below 1.2 MHz (dBm/Hz) MHz from 560 kHz MHz dBm/Hz carrier dBm/Hz dBm/Hz LOW_POWER -62 30 dB -140 -135 -120

HIGH_POWER -56 30 dB -140 -135 -120

08/06/99 DPS Home Phoneline Networking and Compatibility with xDSL and Other Services

! HomePNA Spectral Environment " HomePNA Specification Overview # Compatibility

$ Voice Terminals (Telephones, Fax/Modems)

% G.lite/G.992.2

& G.dmt/G.992.1

' G.VDSL

08/06/99 DPS

Spectral Compatibility

-38 dBm/Hz

-60 dBm/Hz

-62 dBm/Hz ADSL VDSL

HPNA 1.0 variable depending variable on ADSL presence

0 1.1 5.5 9.5 20 MHz

( Analyses show G.DMT/G.lite and POTS should co-exist with HomePNA; depends on system implementations ) In current VDSL proposals, HomePNA overlaps with downstream VDSL * NEXT from HomePNA into VDSL is an issue under study

08/06/99 DPS G.lite/G.992.2 Downstream Transmitter

PSD in dBm/Hz

-36.5 peak

36 dB/octave -36 dB/octave

-72 dB/octave -65 peak -44.2 peak 4.63 dB/octave -90 peak -50 dBm power in any -97.5 peak -72.5 peak +15 dBrn 1 MHz sliding window 0-4 kHz above 4545 kHz

-92.5 peak

552 2290 4545 Frequency 0 4 80 138 11040 956 in kHz 1800 3093

08/06/99 DPS

Crosstalk Models for G.lite Self-NEXT and HomePNA crosstalk into G.dmt

+ The PSD of the G.lite upstream self NEXT can be expressed as:

, 3 = 2 (1) PSDADSL−NEXT PSDADSL−Disturberxn f

- × 10−14 × ( 0.6 where xn = 8.818 n/49) or equivalently, × 10−14 × 0.6 xn = 0.8536 n for n<50.

. ( ) 2 = 2 ( ) 2 The FEXT loss model is: H FEXT f klf H channel f

/ where H_channel is the channel transfer function, k is the coupling constant and is 8 × 10-20 × (n/49)0.6 for n<50 or 3.083 × 10-20 for 10, 1% worst-case disturbers, l is the coupling path length in feet, f is in Hz. The FEXT noise PSD is therefore: 2 PSD − = PSD − H ( f ) 08/06/99 DPS ADSL FEXT ADSL Disturber FEXT G.lite Spectral Compatibility

HomePNA Spectrum

G.lite noise environment

0 HPNA devices and G.lite devices can exist on same wire pair

1 Proper design G.lite and HomePNA devices is necessary 2 08/06/99 DPS G.lite receive filter should beat minimum standards for rejection

G.lite signal after 15K ft. 26 AWG loop

08/06/99 DPS G.992.1/G.dmt Spectral Compatibility

3 HomePNA coupling from neighboring houses will have no impact on G.lite 08/06/9o9 p e DraPtSion

HomePNA - VDSL Spectral Compatibility

HPNA VDSL/ stations ADSL no splitter

VDSL/ADSL VDSL/ HPNA HPNA upstream ADSL XTalk signals & downstream XTalk coupling in binder

4 Cross-talk between VDSL/ ADSL and non-splittered HPNA sharing the same binder group.

5 HPNA signal interfering with VDSL/ ADSL 6 Near End Crosstalk (NEXT) affects downstream VDSL/ ADSL 7 Far End Crosstalk (FEXT) affects upstream VDSL/ ADSL (less severe than NEXT)

8 VDSL/ ADSL signal interfering with HPNA 9 NEXT from upstream channels from nearby homes : FEXT from downstream channels (less severe than worst-case NEXT, dependent on distance from CO/Cab) 08/06/99 DPS Summary

; HomePNA will fuel need for additional bandwidth to the home. xDSL will benefit from HomePNA

< Simultaneous voice calls, VB modem, G.lite is possible using the same wire pair as Home Networking

= VDSL - HomePNA compatibility under study

> Optional isolation filter at Network Interface Device (NID) ? Splitterless ADSL @ Gateway, splitter isolate HomePNA A G.VDSL line code, upstream/downstream frequencies

08/06/99 DPS

Operation over Existing Home Wiring Test Loop #12 0

−5

−10

−15

−20

−25

Magnitude (dB) −30

−35

−40

−45

−50 0 0.5 1 1.5 2 2.5 3 7 Frequency (Hz) x 10

08/06/99 DPS