24 home networking-m.g.i.t-hyderabad
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home networking uploaded by sushil tade

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24 home networking-m.g.i.t-hyderabad 24 home networking-m.g.i.t-hyderabad Document Transcript

  • 101seminartopics.com Home Networking ABSTRACTHome Networking is the collection of elements that process, manage,transport, and store information, enabling the connection and integration ofmultiple computing, control, monitoring, and communication devices in thehome. The price of home computers keep falling, while the advantages forconsumers from being connected online investing and shopping, keeping intouch with long distance friends and tapping the vast resource of the InternetCE keep multiplying. No wonder an increasing number of households owntwo or more PCs.Until recently, the home network has been largely ignored.However, the rapid proliferation of personal computers (PCs) and theInternet in homes, advancements in telecommunications technology, andprogress in the development of smart devices have increasingly emphasizedthe need for an in home networking. Furthermore, as these growth andadvancement trends continue, the need for simple, flexible, and reliablehome networks will greatly increase.1. OverviewThe latest advances in the Internet access technologies, the dropping of PC rates, and theproliferation of smart devices in the house, have dramatically increased the number ofintelligent devices in the consumer’s premises. The consumer electronics equipmentmanufacturers are building more and more intelligence into their products enabling thosedevices to be networked into clusters that can be controlled remotely. Advances in the
  • 101seminartopics.comWireless communication technologies have introduced a variety of wireless devices, likePDAs, Web Pads, into the house. Advent of multiple PCs and smart devices into thehouse, and the availability of high-speed broadband Internet access, have resulted in in-house networking needs to meet the followingrequirements of the consumers:  Simultaneous internet access to multiple home users  Sharing of peripherals and files  Home Control/Automation  Multi-player Gaming  Connect to/from the workplace  Remote Monitoring/Security  Distributed VideoThe home networking requirement introduces into the market a new breed ofproducts called Residential Gateways. A Residential Gateway (RG) will provide thenecessary connectivity features to enable the consumer to exploit the advantages of anetworked home. The RG will also provide the framework for Residential ConnectivityBased Services to reach the home. Examples of such Residential Connectivity BasedServices include: Video on Demand, IP Telephony, Home Security & Surveillance,Remote Home Appliance Repair & Trouble shooting, Utility/Meter Reading, VirtualPrivate Network Connectivity and Innovative E-commerce solutions.Using a reusable framework for home service gateway architecture, offers end-to-endproduct design and realization services for the residential gateways. Coupled with ourstandards based and ready-to-deploy home networking components & solutions (like theWipro BlueTooth Stack, IEEE 1394 core, Voice Over Broadband Infrastructure,Embedded TCP/IP Stack etc.), our customers can enjoy the much need time to marketadvantage and competitive edge.2. What is Home Networking?We have all become very comfortable with networks. Local area networks (LANs) andWide Area Networks (WANs) have become ubiquitous. The network hierarchy has beenrapidly moving lower in the chain towards smaller and more personal devices. Thesedays, Home Area Networks (HANs) and Personal Area Networks (PANs) are joiningtheir larger brother as ever-present communications channels.Home Networking is the collection of elements that process, manage, transport, and storeinformation, enabling the connection and integration of multiple computing, control,monitoring, and communication devices in the home.The price of home computers keep falling, while the advantages for consumers frombeing connected CE online investing and shopping, keeping in touch with long distancefriends and tapping the vast resource of the Internet CE keep multiplying. No wonder anincreasing number of households own two or more PCs. Until recently, the home network
  • 101seminartopics.comhas been largely ignored. However, the rapid proliferation of personal computers (PCs)and the Internet in homes, advancements in telecommunications technology, and progressin the development of smart devices have increasingly emphasized the need for an inhome networking. Furthermore, as these growth and advancement trends continue, theneed for simple, flexible, and reliable home networks will greatly increase.3. Home Networking TechnologiesVarious Technology components are involved in making Home Networking a reality.These are aptly summarized in Figure 3. Figure 3: Home Networking Technologies Source: Network Protocols for the Home CE John CanosaThe Technology Components in the Domain of Home Networking are:  Broadband Access Networks (DSL, Cable, Broadband Wireless) that provides the ubiquity of always ON high-speed digital pipe to the Home.  Residential Gateway Device, capable of interconnecting the Broadband Access Network and the Home Area Network. This device should be capable of delivering valued services to Home.  In-Home Networking Topologies (both wired and wireless), that interconnect the various devices of the home.  Device Access Technologies that facilitate the discovery and interplay of the home devices and services.Broadband Access NetworksThe function of broadband Access Networks is to transfer digital traffic to and fromthe home. The broadband access is much faster and reliable than the present daydialup modem or ISDN modem. Broadband access is an always-ON connectionmeaning that the user does not have to dialup for establishing the connection. The
  • 101seminartopics.comprominent broadband access technologies are the Digital Subscriber Line (xDSL),Hybrid Fiber Coaxial (HFC) network and Broadband Wireless (also called as WirelessLocal Loop). The Broadband Access Provider (e.g. Cable Operator or DSL Operator)will provide Customer Premises Equipment (CPE), which will be located in the userpremises. The connection to the outside world from the Home is through this equipment.The management of the CPE will be taken care of remotely by the BroadbandAccess Provider. Figure 4, Summarizes the various broadband technologies(Source: Cahners Instat group) Figure4: Summarizes Various Broadband TechnologiesIn-Home Network topologiesHome network is a collection of elements that process, manage, transport, andstore information, enabling the connection and integration of multiple computing,control monitoring, and communication devices with in the home. Moving the bitsaround the home is the function of Network infrastructure and equipment thatcomprise the Home Network. Home Network must support multiple data types with highsecurity, easy configuration, low cost, and negligible maintenance.Based on the topology alternative available, the in-home networks can be classified asshown in the Figure 5:  Wired home networks - Use of existing home wiring & New wiring alternatives  Wireless home networks CE No need of any wires new or old
  • 101seminartopics.com Figure 5: Home Network Topologiesy Type Speed Advantages Dis-advantagesResidential GatewayWhen different networks are joined (in this case the Home Network and theBroadband Access Network), a gateway must perform the functions of mediatranslation, address translation, authentication/filtering and system management.One of the architectural options under consideration to perform these functions inthe home is called the Residential Gateway (RG).Over a period of time, how ever manyother intelligent Consumer Premises Equipment like the Advanced Digital Set-top Box,the Home PC, Cable/DSL Modem, Proprietary Home Automation and ControlEquipment etc. could evolve to perform the role of a Residential Gateway (Figure-6). Figure 6: Forms of Residential GatewayIt is clear that making the broadband available does not achieve much unless thebandwidth available is tapped to provide services to the customer. A ServicesGateway (SG) is a device through which multiple services can be delivered overWide Area Networks to the Local Area Networks and devices situated in the home. TheServices Gateway provides a focal point for service providers to deliver services todevices on the home network client
  • 101seminartopics.com Figure 7: Residential Service DeliveryA Home residential gateway, which provides the basic functionality of mediamatching between the broadband access network and the in-home network canfunction as a service gateway, by conforming to the OSGi framework. Figure 8: OSGi FrameworkOSGi (Open Services Gateway Initiative) is a consortium of over 30 companiesworking on the development of open standards and specifications for the servicesgateway. The services gateway can enable, consolidate, and manage voice, data,Internet, and multimedia communications to and from the home, office and otherlocations. The services gateway can also function as an application server for a
  • 101seminartopics.comrange of high value services such as energy management and control, safety andsecurity services, health care monitoring services, device control and maintenance,electronic commerce services and more.Device access protocolsAs the number of smart devices increased they starting using the network to shareeach other services. This was enabled by the Coordination protocol that theyfollowed. Various industry leaders evolved different Coordination protocols, whichenabled the devices to discover and use each other’s capabilities. JINI (Java based devicediscovery and device coordination protocol pioneered by Sun Microsystems), UPnP(Universal Plug and Play pioneered by Microsoft) and HAVi (Home Audio VideoInteroperability pioneered by the consumer electronic industry leaders) are some of thepopular protocol available now.Device coordination essentially means providing a subset of the followingcapabilities to a device:  Ability to announce its presence to the network.  Automatic discovery of devices in the neighborhood and even those located remotely.  Ability to describe its capabilities as well as query/understand the capabilities of other devices.  Self-configuration without administrative intervention.  Seamless inter-operability with other devices wherever meaningful.4. Challenges for Home NetworkingInfrastructure reuseTechnological Options for Home networking should re-use the existing wiringinfrastructure of the home (i.e. electric lines, phone extension sockets etc.) or usewireless mode of communication. People may not like to dig their walls for thesake of rewiring the home or people may not like dangling wires everywhere in thehome.Low CostHome networking solutions should be of less cost. When the cost of the domesticappliances like TV; Fridge etc. are not more a few hundred dollars, the residentialusers may not be willing to pay more for the networking infrastructure and solutions.SimplicityHome networking, products, solutions should be very easy to use. Since theresidential user may not be computer/IT literate, the technologies should be asconsumer friendly as possible. This challenge is a positive point for the consumerelectronics companies (unlike the traditional Computer and Networking majors)who know the real pulse of the residential consumer.
  • 101seminartopics.comReliabilityHome networking products should be very reliable, since they need to operateround the clock. In the view of the consumer, the home networking products are justlike a protocol should also be highly secure and tamper proof.Ease of installation & MaintenanceThe home networking solutions should be easy to install (just a plug and play) andshould facilitate the remote maintenance of the equipment from the vendor site.Currently, an average of two and a half telephone service calls are required toanswer customer installation questions for new consumers of Internet services. Ifa service call takes 10 minutes and the telephone support labor costs the serviceprovider $1.50 per minute, then the customer support calls cost about $37.50. Thisis roughly the cost of a two-month subscription for Internet service. Technicalsupport of customers is a large factor in why residential-based Internet service hasnot been a profitable business to date. Auto configuration will be key in makingRBB (Residential Broad Band) services profitable enough to be an attractive businessproposition.Distance RequirementThe Home Network should cover all parts of the home and premises. Of course,some homes are bigger than others, and greater distances pose problems ofpower, attenuation, and installation cost.Isochronous TrafficThe Home networking products, solutions & technologies should be capable ofcarrying isochronous traffic, and should provide the required Quality of ServiceGuarantees. This is primarily because the residential users would like to use themultimedia equipment like, HDTV (High Definition Television), DVDs (DigitalVersatile Disks), Digital video, HiFi Virtual Reality Games, etc. in tandem withtraditional voice (telephone) & data (PC) services.InteroperabilitySince there are multitude of home networking products, technologies, andsolutions from different vendors the issue of interoperability is a big challenge.This should be effectively dealt by forming industry associations, consortiums andworking groups that come together and make this a reality.5. ConclusionThe latest advances in the Internet access technologies, the dropping of PC rates, and theproliferation of smart devices in the house, have dramatically increased the number ofintelligent devices in the consumer premises. The home networking requirementintroduces into the market a new breed of products called Residential Gateways. AResidential Gateway (RG) will provide the necessary connectivity features to enable theconsumer to exploit the advantages of a networked Home. The RG will also provide the
  • 101seminartopics.comframework for Residential Connectivity Based Services to reach the home. The paperfurther discusses Challenges for Home Networking and Home Networking Technologies.References1. Residential Broadband CE George Abe CE Cisco Press2. Network Protocols for the Home CE John Canosa CE Published in Embedded.comMagazine3. The emerging market for Home Networking Technology and Services, CahnersInstat Group, Feb 2000