Page i Table of Contents Change Log ........................................................................................................... ii Preface to the Second Edition................................................................................ 1 Introduction.......................................................................................................... 3 INSTEON Overview ............................................................................................... 4 Hallmarks of INSTEON ................................................................................... 5 How INSTEON Works ..................................................................................... 6 INSTEON Specifications.................................................................................. 9 INSTEON Comparisons ........................................................................................ 12 ZigBee....................................................................................................... 12 Z-Wave ..................................................................................................... 20 WiFi .......................................................................................................... 25 Bluetooth................................................................................................... 28 LonWorks................................................................................................... 28 HomePlug .................................................................................................. 29 Intellon...................................................................................................... 30 CEBus ....................................................................................................... 31 UHF .......................................................................................................... 32 UPB .......................................................................................................... 32 X10........................................................................................................... 33 Conclusions ......................................................................................................... 35 NOTES ................................................................................................................. 36 APPENDIX I — Z-Wave Usability Evaluation ........................................................ 36 Z-Wave Network Setup ................................................................................ 37 Z-Wave User Interfaces ............................................................................... 38 Missing Z-Wave Modules .............................................................................. 39 Z-Wave Lamp Dimming................................................................................ 40 Page ii Change Log Date Author Change 10-27-05 Paul Darbee Begun 12-21-05 Paul Darbee Released for comment 1-2-06 Paul Darbee Released for publication 3-18-12 Paul Darbee Second Edition Page 1 Preface to the Second Edition Since the first edition of this white paper in January 2006, INSTEON® has been deployed in over a million nodes around the world in hundreds of different products. With feedback from the real world, INSTEON has refined the technology to make it even more robust, reliable and low-cost. Networking is now a way of life, evolving organically much as life itself. Life, though, started “at the bottom,“ with only single-celled organisms existing for billions of years before more complex plants, animals and ecosystems evolved. Our communication networks are more like a nervous system for an already complex civilization. These networks are evolving in a “middle out” fashion, starting with moderate-bandwidth computer networking and working upward to broadband media networking and downward to “networking the small stuff.” Transmission of broadband media requires sophisticated networking protocols to support the high speeds needed for massive data transport. If the payload is television, then errors in transmission can be acceptable and compression which compromises the quality of the original media is tolerable in order to conserve bandwidth. For computer networking, errors in file transmission are normally unacceptable even though files can be large; thus much effort has gone into network infrastructure which gets packets through the network and accurately reassembled no matter what happens along the way. Either way, high-speed or high-reliability, the solutions come at a price. The networking protocols are complex and require intricate hardware and software to implement. In contrast, the “small stuff,” such as light switches, thermostats, sensors, appliances and even light bulbs themselves still linger without benefit of networked control and sensing. By now it’s clear that if a device consumes electrons, it should also process bits so that it can join an ecology of products that we use and interact with every day. Most of us are already carrying around a gadget that could report on the state of our stuff and allow us to control it—our smartphones. Why is it, then, that we still have to walk up to light switches in order to control them? The answer is that there has not been a networking protocol that is at the same time low-cost and reliable enough to be built into common devices like light switches or even light bulbs. INSTEON fits that bill. It is reliable because it does not depend on signaling over the powerline alone or over the airwaves alone, but uses both media at once. It is low-cost because it uses a low data rate, properly sized for command and control, with no pretensions of carrying massive amounts of data. Furthermore, the low data rate enables simulcasting (synchronous transmission of identical signals by all INSTEON devices within range), so that powerline and radio signals benefit from increased signaling energy over their respective media, without infringing regulatory limits. Simulcasting radically increases reliability, but would not be practical at high data rates. So, a properly chosen data rate for command and control enables both low-cost and reliability— properties that are not simultaneously achievable with more complex networking protocols. Despite its low data rate, INSTEON is fast for its intended sensing and control mission. That is because it is not a routed network that sends specific commands from controllers to numerous responders. Instead, a controller merely broadcasts a notification that a certain button has been pushed and all responders that have previously been associated with that button resume the state they were in when the association was first established. Controllers do not necessarily need to know the capabilities of the devices they operate and the response by the controlled devices is virtually instantaneous (normally within 50-100 milliseconds). For insurance, controllers do follow up group broadcast commands with individual “clean up” messages that each affected device must acknowledge, but in practice the insurance is seldom needed. Page 2 Even with its dual-mesh, simulcasting and state-restoration architectural advantages, INSTEON would remain a theoretical “wannabe” were it not for being tested in the crucible of high-volume global deployment and user acceptance. Both the powerline and airwaves are dynamic, hostile environments for signaling, fraught with impairments that come and go unpredictably in the real world. Over the past six years, initial versions of INSTEON have been superseded by numerous improvements, albeit with backward-compatibility protecting consumers’ investments in the installed base. These lessons have forged INSTEON into a practical technology that is ready for deployment from millions of nodes into billions or even tens of billions of installations around the world. Other protocols have been deployed in recent years and many more are on the drawing boards in hopes of becoming adopted by the marketplace. But it is still early in the game. INSTEON can coexist with other low-level, high-volume networks, at the very least because it does not interfere with them. There is already control software that is agnostic as to what physical path or signaling protocol connects sensors and actuators, but in the long run, the marketplace will be very sensitive to the reliability and cost benefits that INSTEON alone enjoys. The transition from commonplace manual control to richly interconnected products of every sort will only happen once on Earth. The decision time is at hand—INSTEON is fully evolved and ready to occupy that enormous niche at the bottom of the food chain right now. The following white paper details the case for these claims and contains updated information regarding the technologies to which it compares INSTEON. Page 3 Introduction Wouldn’t it be great if… You arrive home and the lights come on, the door unlocks and the thermostat adjusts. On a hot day, your blinds automatically close and fans cool the house before your air conditioner comes on, reducing your electric bill. Your smart microwave oven downloads new cooking recipes. You can use your cell phone to check if you left the garage door open and close it if you did. Your cell phone receives a text message if there is water in the basement. When you watch a movie, the lights dim, the blinds close and your TV automatically turns on the surround sound amplifier. These are just a few of the scenarios