Internet access via cable tv network seminar byupender

5,172 views
5,002 views

Published on

Seminar report on Internet access via cable tv network.

Published in: Technology
0 Comments
5 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
5,172
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
440
Comments
0
Likes
5
Embeds 0
No embeds

No notes for slide

Internet access via cable tv network seminar byupender

  1. 1. Internet Access via Cable TV networkAbstractDemand for the high-speed (or broad band) internet access for fast web browsing and moreeffective telecommuting. India has a cable penetration of 80 million homes, offering a vastnetwork for leveraging the internet access. Cable TV has a strong reach to the homes andtherefore offering the Internet through cable could be a scope for furthering the growth ofinternet usage in the homes. The cable is an alternative medium for delivering the Internetservices in the US, there are already a million homes with cable modems, enabling the high-speed internet access over cable. In India, we are in the initial stages. We are experiencing innumerable local problems inMumbai, Bangalore and Delhi, along with an acute shortage of international Internetconnectivity. Accessing the Internet on the public switched telephone networks (PSTN) still hasa lot of problems. Such as drops outs its takes along time to download or upload large files onehas to pay both for the Internet connectivity as well as for telephone usages during that period.Since it is technically possible to offer higher bandwidth by their cable, home as well ascorporate users may make like it. Many people cannot afford a PC At their premises. Hardwareobsolescence in the main problem to the home user who cannot afford to upgrade his PC everyyear and Cable TV based ISP solution s offer an economic alternative. The connection to other computers is possible with the help of ISP (Internet ServiceProvider). Each Internet users depend dialup connections to connect to Internet. This has manydisadvantages like very poor speed, may time cut downs etc. To solve this problem, Internet datacan be transferred through Cable networks wired to the user computer. Internet via Cablenetworks has various advantages like High availability, High bandwidth to low cost, high speeddata access, always on connectivity etc.KITE college of professional engineering and sciences. Page 1
  2. 2. IntroductionInternet is a network of networks in which various computers connect each other throughout theworld. The connection to other computers is possible with the help of ISP (Internet ServiceProvider). Each Internet users depend dialup connections to connect to Internet. This has manydisadvantages like very poor speed, may time cut downs etc. Miraculous developments intelecommunication systems and information technology have created marvels for the newgeneration i.e. Internet using a phone line. Internets via phone connections are painfully slow,especially when downloading photographs, graphics, or video images and large files. To solvethe problem, Internet data can be transferred through Cable networks wired to the user computer.The cable modem technology for the Internet provides an always on feature for individuals toaccess the Internet rapidly, while its digital broadband network technology allows user to movearound quickly. Various advantages are High availability, High bandwidth to low cost, high speed dataaccess, always on connectivity etc. The huge growth in the number of Internet users every yearhas resulted in the traffic congestion on the net, resulting in slower and expensive internet access.As cable TV has a strong reach to homes, it is the best medium for providing the internet tohouse-holds with faster access at feasible rates. The huge growth in the number of Internet users every year has resulted in the trafficcongestion on the net resulting in slower and expensive Internet access. As cable TV has a strongreach to homes, it is the best medium for providing the Internet to house - holds with fasteraccess at feasible rates. There is a higher demand from residential and business customers,especially in the last few years, for access to the Internet, corporate intranets and various onlineinformation services. The Internet revolution is sweeping the country with a burgeoning number of the Internetusers. As more and more people are being attracted towards the Internet, traffic congestion onthe Net is continuously increasing due to limited bandwidths resulting in slower and expensiveInternet access. The number of household getting on the Internet has increased exponentially inthe recent past. First time internet users are amazed at the internets richness of content andpersonalization, never before offered by any other medium. But this initial awe last only till theyexperienced the slow speed of internet content deliver. Hence the popular reference "WorldWide Wait"(not World Wide Web).KITE college of professional engineering and sciences. Page 2
  3. 3. How to Access the Internet via Cable Network?  Use the dial-up telephone services provided by your Cable Company in conjunction with a modem.  To Use a cable ModemFigure1. Working of Cable InternetNetwork Setup:A propose typical cable network is shown in below figure. It consists of Internet backboneconnectivity from internal service protocol. It then goes to the router and to the switch. Theswitch connects to the server as well as the cable modem termination system (CMTS). TheCMTS output goes to the up converter before finally being fed in to the cable network.Information will reach your doorstep, which is a great extended development of satellitetechnology and communication technology to help develop and design such type of networks toKITE college of professional engineering and sciences. Page 3
  4. 4. save the wealth of nation and its potential to parental organization to adopt such a technology.The kind of technology has been already. Existing in the US and UK for the last few years. There are several methods for computer connection, but Ethernet 10 Base T is emergingas the most predominant method. Although it probably would be cheaper to produce the cablemodem as an internal card for the computer, this would require different printed-circuit cards fordifferent kinds of computers, and additionally would make the demarcation between cablenetwork and the customer’s computer too fuzzy.Figure2.Traditional Cable Network  Figure 2 shows traditional cable network, which contains the only one head end. This head end is connected to the Ethernet cable, this cable is attached to each individual home TVs.  Figure 3 shows the modern cable network, which contains the head end with multiple pin to connect different networks. Which enhance the easy way to connection to the homes.KITE college of professional engineering and sciences. Page 4
  5. 5. Figure3. A Modern Cable NetworkCable Modem  A "Cable Modem" is a device that allows high-speed access to the Internet via a cable TV (CATV) network.  The cable modem attaches to computer through an Ethernet Network Interface Card  It takes a signal from the computer and converts it for transmission over the cable network.  For Cable Internet access on PC, a Cable Modem is required at user’s end.  It has two connections; one to the TV cable wire and the other to a computer.  A Cable Modem sends and receives data to and from the Internet by using the existing coaxial cable network.  The modem translates cable signals the same way a telephone modem translates signals from a telephone line.KITE college of professional engineering and sciences. Page 5
  6. 6.  Cable modems translate radio frequency (RF) signals to and from the cable plant into Internet Protocol (IP), the communications protocol spoken by all computers connected to the Internet.  At the customer premise, a high quality two way splitter is installed on the Cable TV line, with one output connected to the Cable Modem and the second output connected to the TV.Ethernet over Coaxial Cable  The Ethernet over Coax adapter provides a simple and inexpensive way to create a reliable home network, without running CAT5 cables through your walls.  It delivers high speed internet, voice and video over coaxial cable.  Ideal for homes, apartment buildings or hotels seeking to add high-speed internet capabilities over existing coaxial TV cables. Fig1.CableAdaptorChanges in Cable Network  The cable network was designed to deliver TV signals in one direction from the Head- End to the subscriber’s homes.  To provide TV services Cable Operators had to recreate a portion of the over-the-air radio frequency (RF) spectrum within a sealed coaxial cable line.KITE college of professional engineering and sciences. Page 6
  7. 7.  Operators had to upgrade the cable network so that signals could flow in both directions. Cable Operators assign a spectrum of signal frequencies to the cable network.  One spectrum is used for the signals that move from the Head-End towards the cable subscriber.  Another spectrum of signal frequencies are used for the signals that move from the cable subscriber towards the Head-End.  By replacing existing one way amplifiers with two way amplifiers Cable Operators are able to separate the upstream and downstream signals and amplify each direction separately in the right frequency range.How fast is a Cable Modem?  Cable modem speeds vary widely depends on the cable modem system Cable network architecture Traffic load. In the downstream direction (from the network to the computer), network speeds can be up to 27 Mbps.  BUT, this is an aggregate amount of bandwidth that is shared by users. Few computers will be capable of connecting at such high speeds or have exclusive access to the network. A more realistic number is 1 to 3 Mbps.  In the upstream direction (from computer to network), speeds can be up to 10 Mbps. However, most modem producers have selected a more optimum speed between 500 Kbps and 2.5 Mbps. And many cable operators limit the upstream bandwidth to 128 or 384kbs.  An asymmetric cable modem scheme is most common. The downstream channel has a much higher.Real-world performance  The theoretical performance of a Cable Modem is based upon all other devices being able to work at the same speed and performance as the Cable Modem.  However, in a similar way that the actual usable bandwidth on a 10MbpsEthernet connection reduces to a 4Mbps, so too will the performance of a Cable Modem connection be reduced.KITE college of professional engineering and sciences. Page 7
  8. 8.  The Cable network itself will suffer the same problems of Internet performance as any other Internet Service Provider (ISP).  Although performance to services on the cable network itself can be amazingly fast, access to the outside world will be slowed down by the performance of other connections on the way.  As usage on your segment grows (as more customers are added) the bandwidth must be shared by more people.Support for Multiple PC’s  A cable modem can provide Internet access to multiple PCs, if they are connected via a local area network (LAN)  Cable modems typically have an Ethernet output, so they can connect to the LAN with a standard Ethernet hub or router.  Each PC must have an assigned IP address  The cable ISP usually sells at a premium of $5-$10 a month per PC.  NAT (Network Address Translation) can allow multiple PCs to "hide" behind a single IP AddressSome company names of Cable Modem  3Com  Cisco Systems  Com21  General Instrument  Motorola  Nortel Networks  Phasecom  Samsung  Terayon,  Toshiba  ZenithKITE college of professional engineering and sciences. Page 8
  9. 9.  And many othersAdvantages  A cable modem can provide Internet access to multiple PCs, if they are connected via a local area network (LAN)  Cable modems typically have an Ethernet output, so they can connect to the LAN with a standard Ethernet hub or router  Each PC must have an assigned IP address o The cable ISP usually sells at a premium of $5-$10 a month per PC o NAT (Network Address Translation) can allow multiple PCs to "hide" behind a single IP Address  Advanced High Speed Internet Access Service.  No new software is required.  No reconstruction of the cable system necessary.  Use Of free frequency range from 3 to 5 MHz without TV program reorganization.  Integration of the modem in the Billing System via router, accounting per space of time or volume possible.  Components and amplifiers must have only return path ability.Limitations  Bandwidth is shared over the same cable line. Connection speed is affected by the number of people using the internet at the same time in your neighbourhood.  Higher security risk than dialup (personal firewall is needed).  Not available to all cable TV networks.  Usually tied with cable TV subscriptionConclusion  Cable TV has a strong reach to the homes and therefore offering the Internet through cable be a scope for furthering the growth of internet usage in the homes.  The cable is an alternative medium for delivering the Internet Services in the US, there are a million homes with cable modems, enabling the high-speed internet access over cable.KITE college of professional engineering and sciences. Page 9
  10. 10. References  http://en.wikipedia.org/wiki/Cable_Internet_access  http://en.wikipedia.org/wiki/Cable_modem  http://en.wikipedia.org/wiki/Internet_Access  http://en.wikipedia.org/wiki/Cable_modem_termination_system  http://computer.howstuffworks.com/cable-modem.htm  http://www.hathway.com/brodband/prod_broadband_faq3.asp  www.slideshare.net/.../internet-access-via-cable-network - United States  www.scribd.com/doc/38687880/Internet-Access-via-Cable-TV-Network  www.seminarprojects.com/Thread-internet-access-via-tv-cable-networkKITE college of professional engineering and sciences. Page 10

×