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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [LRSG-RF Lite Overvie PowerPoint Presentation
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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [LRSG-RF Lite Overview] Date Submitted: [6, November, 2000] Source: [Benno Ritter] Company [Philips Semiconductor] Address [1109 McKay Drive M/S 48-SJ, San Jose, CA 95131-1706, USA]

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: [LRSG-RF Lite Overview]

Date Submitted: [6, November, 2000]

Source: [Benno Ritter] Company [Philips Semiconductor]

Address [1109 McKay Drive M/S 48-SJ, San Jose, CA 95131-1706, USA]

Voice:[(408) 474 5116], FAX: [(408) 474 7247], E-Mail:[benno.ritter@philips.com]

Re: [Presentation for Low Rate WPAN Tutorial]

Abstract: [Presenation on RF Lite Applications and Technology]

Purpose: [General Informaton as part of a Low Rate Tutorial to 802]

Notice: This document has been prepared to assist the IEEE P802.15. 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 acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

Benno Ritter, Philips Semiconductors

rf lite a solution for low data rate wireless networks 11 6 2000

RF-Litea solution forLow Data Rate Wireless Networks11/6/2000

Benno Ritter

IPMM-Wireless Connectivity

BL-Networking

Philips Semiconductors

Benno Ritter, Philips Semiconductors

home and office network cluster

Internet

Home and Office Network Cluster

Entertainment Cluster

PC/Productivity Cluster

BBW POTS Sate. xDSL Cable

Gateway

Home Control/Automation

and Management Cluster

Communications Cluster

Smoke Detectors

Home Appliances

Security Systems

The Home

Network

Temperature Control

& Heating

Benno Ritter, Philips Semiconductors

example market sectors
Example Market Sectors

·

Mouse

·

TV

·

Keyboard

·

VCR

·

Joystick

·

DVD

Consumer

Gamepad

·

·

CD

·

Electronics

·

Remote

·

Personal

PC

Healthcare

Peripherals

·

Monitors

Low-End Radio

·

Diagnostics

·

Sensors

Devices

·

·

Security

Home

·

PETs

·

HVAC

Automation

Toys &

·

Gameboys

·

Lighting

·

Educational

·

Closures

Games

·

·

Benno Ritter, Philips Semiconductors

market drivers
Market Drivers
  • Extremely low cost
  • Ease of installation
  • Reliable data transfer
  • Reasonable battery life
  • Short range operation

Benno Ritter, Philips Semiconductors

philips solution
Philips Solution
  • Protocol specification (“PURL”)
  • Software design and implementation
  • Air interface design
  • Baseband and radio IC implementation

Benno Ritter, Philips Semiconductors

purl protocol for universal radio links a protocol for low cost radio devices

PURLProtocol for Universal Radio LinksA Protocol for Low Cost Radio Devices

Benno Ritter, Philips Semiconductors

purl features
PURL Features
  • Master/slave topology
  • Automatic network configuration
  • Dynamic slave device addressing
  • Virtual peer-to-peer links (pairing)
  • Full handshaking for packet transfers
  • Power management features
  • Up to 254 (+ master) network nodes

Benno Ritter, Philips Semiconductors

purl features cont
PURL Features Cont...
  • CSMA-CA channel access mechanism
  • 15ms frame structure
  • TDMA slots can be allocated
  • 10kbps & 115kbps (actual) data throughput
  • Service discovery (UPnP-Lite)
  • Low impact internet capability

Benno Ritter, Philips Semiconductors

data transfer

Data Transfer

Benno Ritter, Philips Semiconductors

frame structure

Basic frame:

Time, ms

t

t + tf

Slotted frame:

Time, ms

t

t + tf

Contention period

Allocated slot

Network beacon

Frame Structure

Benno Ritter, Philips Semiconductors

data transfers

Data

Packet

Data

Handshake

Data

Request

Data

Packet

Data

Handshake

Data Transfers

Uplink transfer:

Network

Beacon

Downlink transfer:

Network

Beacon

From

Master

Message

Transfers

From

Slave

Benno Ritter, Philips Semiconductors

network management

Network Management

Benno Ritter, Philips Semiconductors

network initiation
Network Initiation
  • Master capable devices only
  • Listens for network beacons
  • Attempts to invoke network beacons
  • Assumes unique network identifier
  • Starts master operation

Benno Ritter, Philips Semiconductors

network topology

Curtains

DVD

STB

Master node

Remote

Lamp

Slave node

Communications flow

TV

Control flow

Network Topology

Benno Ritter, Philips Semiconductors

air interface physical layer

Air Interface Physical Layer

Benno Ritter, Philips Semiconductors

frequency bands
Frequency Bands
  • 2.4GHz ISM band
    • Channel spacing: 3MHz, F = 2404 + 3k MHz with k = 0, 1, …, 25
    • Common band:
      • USA, Europe including France and Spain
      • k = 15, …, 22 F = 2449 – 2470 MHz, 8 channels
  • 915MHz ISM band
    • USA only
  • Direct sequence
    • Fast acquisition
    • Complexity in digital domain (cheaper)
  • Spread using length 11 Barker sequence
    • Short sequence gives fast acquisition
    • Used in IEEE802.11
  • 2.2Mchips/sec
  • Processing gain of 10.4dB
  • GFSK, Modulation index h = 0.5, Pre-modulation filterBT = 0.5

Benno Ritter, Philips Semiconductors

application scenarios and system realisation

Application Scenariosand System Realisation

Benno Ritter, Philips Semiconductors

applications slave device

Light Switch

Thermostat

Accessory Control

Security Sensor

Computer Keyboard

Applications :- Slave Device

Benno Ritter, Philips Semiconductors

block diagram
Block Diagram

Benno Ritter, Philips Semiconductors

development platform
Development Platform

Benno Ritter, Philips Semiconductors

development platform1
Development Platform

Benno Ritter, Philips Semiconductors

demonstration

Demonstration

Benno Ritter, Philips Semiconductors

current demonstration

Internet Connection

WWW

Terminal

STB

Switch

Fan

Auto-dialler

Current Demonstration

Benno Ritter, Philips Semiconductors

homerf lite firefly rf lite
HomeRF-Lite -> Firefly -> RF-Lite
  • Low data rate (<200kbps) with fall back for longer range to 20kbps
  • Very low cost (BOM<$6.00) in 2001 and <$2.50 in 2003
  • Designed for battery operated systems
  • Replaces wired solutions that require low data rates
  • Simple MAC protocol (PURL): master-slave or virtual point-to-point applications, reduces system complexity
  • Applications: peripherals to PC, temperature control, home security, toys, etc.
  • Support from growing number of companies
  • Web Address for RF-Lite committee (http://RF-Lite.com or //12.5.139.199/ )
    • Access to the technology through membership in RF-Lite

Benno Ritter, Philips Semiconductors

thank you

Thank You!

Benno Ritter, Philips Semiconductors