Transcript Heile
Open House, Carlsbad, CA Feb 17, 2003 Bob Heile, Chair, Zigbee Alliance Today’s Agenda Time Discussion Topic Moderator 1:00 PM Welcome and Introductions Bob Heile, ZigBee Alliance Chairman 1:05 PM ZigBee Alliance Overview, Bob Heile Goals and Objectives 1:40 PM ZigBee Promoter Introductions and Presentations: Philips Venkat Bahl, Business Development Manager,Philips Semiconductors Karen Dunning, Vice President and Director of Motorola Licensing and Business Development Mitsubishi Michael Weseloh, MCU Strategic Marketing Manager Honeywell Invensys 2:30 PM IEEE 802.15.4 Status and Technical 2:50 PM Update Break Patrick Gonia, Senior Staff Scientist, Automation & Control Solutions Ron Strich, Executive Vice President, Invensys Home Controls Pat Kinney, Invensys Month Year 2 Copyright 2003 The ZigBee Alliance, Inc. Today’s Agenda (2) Time Discussion Topic Moderator 3:10 PM ZigBee Marketing Overview Venkat Bahl, Philips 3:30 PM ZigBee Technical Working Groups Goals and activities of each working group Profiles Architecture Building Automation Networking Security Interoperability Nick Shepherd, Philips Pat Kinney, Invensys Monique Bourgeois, Motorola Dan Bailey, Ntru Bhupender Virk, Philips 4:15 PM ZigBee Member Companies 5:00 PM Closing Q & A 5:15 PM Sunset Reception Bob Heile Month Year 3 Copyright 2003 The ZigBee Alliance, Inc. Mission Statement ZigBee Alliance members are defining global standards for reliable, cost-effective, low power wireless applications. The ZigBee Alliance is a rapidly growing, non-profit industry consortium of leading semiconductor manufacturers, technology providers, OEMs and end users worldwide. Month Year 4 Copyright 2003 The ZigBee Alliance, Inc. The ZigBee Alliance Solution • Targeted at home and building automation and controls, consumer electronics, PC peripherals, medical monitoring, and toys • Industry standard through application profiles running over IEEE 802.15.4 radios • Primary drivers are simplicity, long battery life, networking capabilities, reliability, and cost • Alliance provides interoperability and certification testing Month Year 5 Copyright 2003 The ZigBee Alliance, Inc. History Proposals Proposal ZigBee Alliance formed Initial MRD RSI/TRD v0.2 to IEEE ZigBee IEEE 802.15.4 PAR Proposals 1998 1999 2000 2001 Month Year Reviews Expected completion 2002 6 Copyright 2003 The ZigBee Alliance, Inc. Promoter Companies Month Year 7 Copyright 2003 The ZigBee Alliance, Inc. Membership Classes • Promoters – founding members of ZigBee, who form the Board of Directors. There are currently 5 promoters + 1 chairperson • Participants – members who generally wish to make technical contributions and/or serve on the Technical Group committees. These members have early access to specifications, and they may also chair working group subcommittees. They are in a position to help shape the ZigBee technology for industrial applications and the connected home. Month Year 8 Copyright 2003 The ZigBee Alliance, Inc. Working Groups • Profile Architecture (Nick Shepherd) • Network (Monique Bourgeois) • Security (Dan Bailey) • Interoperability (Bhupender Virk) • Building Automation (Pat Kinney) • Marketing (Venkat Bahl) Month Year 9 Copyright 2003 The ZigBee Alliance, Inc. Organization Structure Month Year 10 Copyright 2003 The ZigBee Alliance, Inc. The Wireless Market GRAPHICS INTERNET HI-FI AUDIO STREAMING VIDEO DIGITAL VIDEO MULTI-CHANNEL VIDEO > LONG TEXT SHORT < RANGE 802.11b LAN 802.11a/HL2 & 802.11g Bluetooth 2 ZigBee PAN Bluetooth1 LOW < DATA RATE > HIGH Month Year 11 Copyright 2003 The ZigBee Alliance, Inc. Applications monitors sensors automation control monitors diagnostics sensors INDUSTRIAL & COMMERCIAL CONSUMER ELECTRONICS TV VCR DVD/CD remote ZigBee PERSONAL HEALTH CARE consoles portables educational LOW DATA-RATE RADIO DEVICES TOYS & GAMES HOME AUTOMATION Month Year PC & PERIPHERALS mouse keyboard joystick security HVAC lighting closures 12 Copyright 2003 The ZigBee Alliance, Inc. Development of the Standard • ZigBee Alliance – 45+ companies: semiconductor mfrs, IP providers, OEMs, etc. – Defining upper layers of protocol stack: from network to application, including application profiles – First profiles published mid 2003 • IEEE 802.15.4 Working Group – Defining lower layers of protocol stack: MAC and PHY scheduled for release in April Month Year APPLICATION Customer ZIGBEE STACK SILICON ZigBee Alliance IEEE 802.15.4 13 Copyright 2003 The ZigBee Alliance, Inc. Frequencies and Data Rates BAND COVERAGE 2.4 GHz ISM 868 MHz 915 MHz ISM DATA RATE CHANNEL(S) Worldwide 250 kbps 16 Europe 20 kbps 1 Americas 40 kbps 10 Month Year 14 Copyright 2003 The ZigBee Alliance, Inc. Stack Reference Model End developer applications, designed using application profiles Application interface designed using general profile Topology management, MAC management, routing, discovery protocol, security management Channel access, PAN maintenance, reliable data transport Transmission & reception on the physical radio channel ZA1 ZA2 … ZAn IA1 API IAn UDP IP ZigBee NWK 802.2 LLC MAC (SSCS) IEEE 802.15.4 MAC (CPS) IEEE 802.15.4 PHY Month Year 15 Copyright 2003 The ZigBee Alliance, Inc. Protocol Stack Features • Microcontroller utilized • Full protocol stack <32 k • Simple node-only stack ~4k • Coordinators require extra RAM – Node device database – Transaction table – Pairing table APPLICATIONS Customer APPLICATION INTERFACE SECURITY NETWORK LAYER Star/Cluster/Mesh DATA LINK LAYER MAC LAYER MAC LAYER PHY LAYER 2.4 GHz 915MHz ZigBee Alliance IEEE 802.15.4 868 MHz Application ZigBee Stack Silicon Month Year 16 Copyright 2003 The ZigBee Alliance, Inc. ZigBee vs Bluetooth Competitive or Complementary? ZigBee and Bluetooth address different needs • Bluetooth is a cable replacement for items like Phones, Laptop Computers, Headsets Month Year 18 Copyright 2003 The ZigBee Alliance, Inc. ZigBee and Bluetooth address different needs • ZigBee is better for devices Where the battery is ‘rarely’ replaced Month Year 19 Copyright 2003 The ZigBee Alliance, Inc. Bluetooth is Best ... For : • Ad-hoc networks between capable devices • Handsfree audio • Screen graphics, pictures… • File transfer • ... but ZigBee is Better IF : • The Network is static • Lots of devices • Infrequently used • Small Data Packets Month Year 20 Copyright 2003 The ZigBee Alliance, Inc. 2.4 gig Air interface ZigBee Bluetooth • • • • • • FHSS • 1 M Symbol / second DSSS 11 chips/ symbol 62.5 K symbols/s 4 Bits/ symbol Peak Information Rate ~128 Kbit/second • Peak Information Rate ~720 Kbit / second Month Year 21 Copyright 2003 The ZigBee Alliance, Inc. Battery Life • Bluetooth expects regular charging – Target is to use <10% of host power • ZigBee is for use with Primary Cells – Targets are : • Tiny fraction of host power • New opportunities where wireless not yet used Month Year 22 Copyright 2003 The ZigBee Alliance, Inc. Initial Enumeration ZigBee Bluetooth Coordinator Coordinator Month Year 23 Copyright 2003 The ZigBee Alliance, Inc. Error Correction / Security • Bluetooth offers some Forward Error Correction • 0, 40, 64 & 128 bit encryption • ZigBee handshakes detect errors and initiate retransmission. • Application Level Security Month Year 24 Copyright 2003 The ZigBee Alliance, Inc. Protocol Stack Comparison Voice Application Interface Network Layer Telephony OBEX Control RFCOMM Protocol Service Discovery Protocol (Serial Port) Link Manager MAC Layer MAC Layer Link Controller Baseband RF PHY Layer ZigBee Stack Fax L2CAP Host Control Interface Data Link Layer Silicon Dial-up Networking Application vMessage Intercom Headset Cordless Group Call vCard vCal vNote User Interface Application Silicon Zigbee Bluetooth Stack Applications Bluetooth Month Year 25 Copyright 2003 The ZigBee Alliance, Inc. An Application Example Battery Life & Latency in a Light Switch • Wireless Light switch - Easy for Builders to install • Bluetooth would either : – keep a counter running so that it could predict which hop frequency the light would have reached or – use the inquiry procedure to find the light each time the switch was operated. Month Year 26 Copyright 2003 The ZigBee Alliance, Inc. Battery Power Consumption Efficiency • The two devices must stay within 60 us (~1/10 of a hop) • 30ppm crystals => could increase at 60us per second. • Devices communicate once a second to track each other's clocks. • Possibly could be improved by a factor of 100. • The devices would then need to communicate once every 100 seconds to maintain synchronization. • => 900 communications / day with no information transfer • + perhaps 4 communications on demand • 99.5% Battery Power wasted Month Year 27 Copyright 2003 The ZigBee Alliance, Inc. Latency • Undertake Bluetooth inquiry procedure when light switch operated • May typically take 10-30 seconds using Bluetooth 1.1 ? • Even if optimized (Bluetooth 1.2), latency is a few seconds Month Year 28 Copyright 2003 The ZigBee Alliance, Inc. Light switch Conclusion • ZigBee radio using DSSS need only perform CSMA before transmitting, a delay of only 200 ms • In the case of a light switch, ZigBee offers longer battery life and lower latency than a Bluetooth equivalent. Month Year 29 Copyright 2003 The ZigBee Alliance, Inc. Conclusion • ZigBee targets applications not addressable by Bluetooth or any other wireless standard • ZigBee and Bluetooth complement for a broader solution Month Year 30 Copyright 2003 The ZigBee Alliance, Inc. More Information ZigBee Alliance web site http://www.ZigBee.org IEEE 802.15.4 web site http://www.ieee802.org/15/pub/TG4.html Bob Heile, Chair [email protected] Month Year 31 Copyright 2003 The ZigBee Alliance, Inc.