Copyright © 2004, HomePlug Inc Standards provide the fundamental framework within which all of...

Copyright © 2004, HomePlug Inc

“Standards provide the fundamental framework within which all of these competing services can co-exist without interfering with one another to provide commercial services over a common infrastructure – the electromagnetic spectrum. Without rules of the road, coordination, and fair use of a shared infrastructure - standards - everyone loses.”

Erich W. Gunther, P.E.

Chief Technology Officer, Principal Consultant

EnerNex Corporation

HomePlugand

BPL Coexistence


HomePlug Overview

• Founded March 2000 by 13 industry-leading companies• Developed Market Requirements Document (MRD) for

HomePlug in-home technology• Identified and invited candidates to participate in

technology selection, spring 2000– lab testing– field testing– design analysis

• Baseline technology (version 0.01) released in May 2000• 1.0 Formal specification released June 2001 • Developed MRD for HomePlug AV Feb 2003• Released RFP for HomePlug AV May 2003• HomePlug AV is in the final stage of the specification

development • HomePlug BPL MRD development was launched in May

2004

SPONSOR MEMBERS


Powerline Coexistence – Background

• In-home powerline network is not natively contained within the home

• Utility power meter is somewhat of a gate, but only provides about 20dB of signal attenuation

• Signals do reach out to the Utility LV transformer and can continue on into neighboring homes

• Problem is worsened by:– Increase in residence density, rural areas less affected, or

not all– Cross-cable coupling in multiple dwelling units(i.e

apartments)

• In-home and Utility powerline networks will collide


Coexistence Methods

• Mechanical Separation - Filters– Low-pass filter– Not practical for homeowner install– Added expense for utility rollout– A possible “value-add” type of solution in the future

• TDM– In use today in HP v1.0 deployments

• FDM– Recommended by ETSI, 2 phases

• 1) Fixed division• 2) Flexible division

– Requires signaling between both networks

• Technology independent signaling to allow co-existence of various proprietary technologies– This approach would delay standard development and is not

beneficial to the industry


Difficulties

• FDM– Very inefficient use of a limited bandwidth

– Increased design complexity and cost to solve the linearity/gain problem

– ETSI Phase 2 requires an interoperability compliance with low-level signaling

• Low-level common PHY components

• TDM– Requires common PHY between BPL and in-home

– Requires standardization/compliance of both BPL and in-home devices

– Traffic must be coordinated between in-home and BPL


HomePlug Approach• Provides contiguous network with common physical layers• 200-Mbps class PHY capable of carrying multiple HDTV

programs• An advanced Physical Layer that offers near-capacity

throughput performance and exceptional coverage for robust communications over noisy power line channels

• A high-efficiency MAC layer that incorporates both scheduled access (TDMA) with Quality of Service (QoS) guarantees, and contention access (CSMA). Features that are a must for the demands of multi-media and VoIP content delivery include guaranteed bandwidth reservation, tight control of latency and jitter, and high reliability.

• Co-existence modes enabling Broadband Powerline (BPL) co-existence, multi-network operation, hidden node service, and backward compatibility with HomePlug 1.0. Support of both TDM and FDM mechanisms.

• Advanced Network Management functions and facilities capable of supporting plug-and-play, user and service provider set-up and configuration


HomePlug AV

• Multi-vendor support

• Integrated technology components from several companies

• Nearing release of Internal Specification

• Technology components have already been tested in real-world environments

• Actively recruiting technology professionals from Participant member companies to complete specification process

• OFDM PHY – Advanced FEC• MAC: TDMA & CSMA• 200Mbps-class Service• 2 – 28MHz• Advanced QoS• Enhanced Security• AV and 1.0 Technologies can

share power line. Spec allows interoperability.

• BPL Co-existence (TDMA & FDMA)

• Expected Release of Spec: 1Q/05


Invitation

All eligible HomePlug Alliance members are invited to join the

Specification Working Group (SWG), which is holding its first meeting on October 27th and

28th in Dallas, Texas.

Copyright © 2004, HomePlug Inc Standards provide the fundamental framework within which all of...

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