WSU CSE 6362 - Discovering Devices and Services In Home Networks

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Discovering Devices and ServicesUseful systems from information appliancesAn IBM White PaperJune, 1999Executive SummaryIntroductionThe Rise of Information AppliancesTowards Self-ConfigurationDiscovery ProtocolsImportant Service Discovery ProtocolsSalutationSLPJiniUniversal Plug and PlayHAViBluetoothService Discovery Interoperability: the key to Versatility AxiomCommon Features of Service Discovery ProtocolsConclusionAppendix: A Possible Home Networking Scenario of the FutureDiscovering Devices and ServicesIn Home NetworksUseful systems from information appliancesAn IBM White PaperJune, 1999Executive SummaryThe emergence of information appliances and new types of connectivity is spurring a new form ofnetworking: unmanaged, dynamic networks of consumer devices that spontaneously and unpredictably joinand leave the network. Consumers will expect these ad hoc, peer to peer networks to automatically formwithin the home, in very small businesses and in networked vehicles.Home networking, or systems of information appliances, have some unique requirements beyondtraditional local area networking. For this technology to be accepted by consumers, it must be very easy touse. A key aspect of making these networks easy to use is making them self-configuring, rendering themvirtually transparent to the consumer.This white paper discusses:• the unique requirements for successful home networking, in particular, the ease of use requirement;• the role of self-configuration to address the ease of use requirement;• how service discovery and service discovery protocols enable self configuration;• the challenges presented by the growing number of service discovery protocols in the industry andinteroperability solutions that overcome these challenges.Over the course of the next five years, multiple discovery protocols will exist. These protocols mustinteroperate to meet the needs of the marketplace. IBM is working on technology and solutions to enableinteroperability of devices and services that participate in heterogeneous service discovery protocols.Discovering Devices and Services in Home Networking IBM White Paper2The authors have used their best efforts in the preparation of this report. International Business MachinesCorporation and the authors make no representation or warranties with respect to the accuracy orcompleteness of the contents of this report.The following terms, denoted by ® or ™, used in this report are registered trademarks or trademarks ofInternational Business Machines Corporation in the United States and other countries.IBMHome DirectorThe following terms, denoted by ® or ™, used in this report are registered trademarks or trademarks of thelisted holder. All other brand names and product names used in this report are trademarks, registeredtrademarks, or trade names of their respective holders.Bluetooth Bluetooth Special Interest GroupHAVi Member companies of the HAVi consortiumJava Sun Microsystems, Inc.Jini Sun Microsystems, Inc.Salutation Salutation ConsortiumUniversal Plug and Play Microsoft Corp© Copyright 1999 by International Business Machines Corporation. All rights reservedDiscovering Devices and Services in Home Networking IBM White Paper3IntroductionA wide range of phenomena is driving the emergence of home networks. Among these phenomena are:1. New forms of connectivity within the home• Phone line networking technology like Home Phoneline Networking Alliance1• Wireless radio frequency-based technologies like HomeRF2 and Bluetooth3• Power line networking technology, such as Intellon4's recently-announced high-speed power linenetworking technology• Messaging and interoperability standards such as CEBus 5• Structured wiring6 in new construction2. More multiple PC households• Second (or third) desktop systems, driven by the emergence of $599-$999 systems• Notebook computers that are brought home from the office each nightThis trend is described in a CNNFN7 article dated February 23, 1999:“A survey published earlier this year by Boston-based market research firm Yankee Groupshowed that 30.5 percent of U.S. households with PCs are interested in a way to connect electronicdevices in their homes. Dataquest projects 350,000 U.S. households with more than one PC willbe networked this year. The firm expects that number to jump to 1 million households by 2000and 3.3 million in 2001.”• These PCs need to share resources such as printers and Internet access.3. The continuing emergence of smart consumer devices• home controllers• network printers• PDAs and other information appliances• Networked vehicles or smart cars• WebCams (surveillance cameras with built-in Web servers)• in general, whole new generation of network-enabled consumer electronics available or underdevelopment, like home security systems, home entertainment systems, and smart appliancesThe Rise of Information AppliancesComputer chips are being embedded into the next generation of everyday devices. Our cars have had themfor years -- now our children’s toys, our kitchen appliances, and our living room entertainment systemshave computing power that rivals previous desktop computers.In addition, the emergence of no new wires networking technology has allowed these computer-enableddevices to become network connected. The result is very powerful and useful systems of these devicescooperating to simplify everyday activities and provide new functionality.Donald Norman8 lists three critical design principles for the viability of information appliances:• Simplicity• Versatility• Pleasurability. 1 http://www.homepna.org2 http://www.homerf.org3 http://www.bluetooth.com4 http://www.intellon.com5 http://www.cebus.org6 For example, see http://www.ibm.com/homedirector7 http://cnnfn.com/digitaljam/9902/23/feature_networking/index.htm8 The Invisible Computer, Donald A. Norman, ©1998 Donald A NormanDiscovering Devices and Services in Home Networking IBM White Paper4The systems of information appliances we build for the home must be suitable for the non-technical user.The beneficiaries of these systems are you, your parents, your children, your spouse, and your neighbors;not all of these people will have the skills or desire to manage and maintain complex computing systems.The viability of these products relies on how simple they are to set up, use and modify; how versatile theyare, allowing new combinations of devices and services; and how


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