Class Note for EECS 563 with Professor Frost at KU 2
Class Note for EECS 563 with Professor Frost at KU 2
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Date Created: 02/06/15
The Evolution of the Communications Network 3 Victor S Frost Dan F Servey Distinguished Professor Electrical Engineering and Computer Science University of Kansas 2335 Irving Hill Dr Lawrence Kansas 66045 Phone 785 8644833 FAX785 8647789 email frosteecskuedu httpwwwittckuedu Evolution 1 The Evolution of the Communications Network I What makes communication systems work I How the network evolved I How network provided more services for less cost I Predict where technology is going and the impact of future services Evolution 2 Elements of Communications Time Offh00k I want to Talk to Ioeg Central Office Page 220 Evolution 3 Elements of Communications Time Central Office I have 1096 permission 0a Evolution 4 page 220 Elements of Communications Time Numbe I need to Central give the net 1 Office the address Page 220 Evolution 5 Elements of Communications Time Check path to Ice Check if Busy Central mxg badg Ioe Answers Evolution 6 page 220 Elements of Communications Time Central Office Talk tame page 220 We Answers 11 Evolution 7 Elements of Communications Time Central Office moa g I hang up page 220 a Ugeup Ioe Hangs up Evolution 8 Voice over IP VoIP I One signaling protocol for VoIP is SIP I Session Initiation Protocol CalledBob Caller listen on pm 5060 listen on port 5060 5 INVITE bob193 64210 89 1N1P4167180 112 24 aule 38060 RTPAVP 0 200 ok c IN IP4193 6421089 k maudlo 48753 RTPAVPs Por138060 Talk lt 5 Talk Port 48753 From ComputerNetWorkmg Kumse and 120534Yd edmon Evolu on 9 Addison Wesley 2004 Elements of a Communications System I Transmission l Switching I Signaling Evolution 10 a my g M W Q Li Q smh H smh w W E 9 Wm W Tn Med Coppervm Dwaimmwmmb smug pm Comm Tm mag W W W S J mmg 5 5 smh E n Maggi Evolution 11 Digitizing Voice Signals Standard rates for PSTN Sample Rate 80005 8bitssample IJmammalmljjHummusualmnnwogluum mam 39 64 Kbs 39 Evolution 12 Section 3 1 Tune visim Mul plexing A i i A 5 i TDM E c E i Z i C W D E Tum lesmn Multiplexed 51ng WA 5273961821u 13 Circuit Switching FDMA and TDMA Example FDMA Frequency Division Multiple Access 4 users DEED Channel frequency TDMA Time Division I Time Multiple Access Frame slot r H A frequency gt time Modi ed from cmmmmmmimg A T17 17mm AWth qunvigthelntmet Evoluuon 14 2nd Edition Jim Kurose Keith RossAddssoanESlE yJuly 2002 Switching I Manual I Stepbyistep I Crossbar with stored program control I Digital Switching I Packet Switching I Optical Switching Emmy 15 Stored Program Control System I mm m W7 umz lwfgg 7 mm m om Immud ms quotmax mm mu cotquotm mumv mo rum umquot gunmun mammm mum Anvvmunm mu non ummmm munum mm 17 Crossbar Switch Switching cunt ngm T mmmmm m 7 w Digital Switching ngm T mmmmm m 19 Packet Switching I Existing switching methods allow connections at discrete information transfer rates eg 64 Kbs or 1544 Mbs I Customers quotwill demandquot dynamic allocation of bandwidth I Packet switching will provide dynamic allocation of bandwidth I One infrastructure for voice data Video I VolP and Video over IP Evolution 20 Packet Switching I Internet Protocol IP gt Longer variable length packets gt Deployed to the desktop I Asynchronous Transfer Mode ATM gt Short fixed length packets called cells gt Deployed in Backbone Networks I Packet switching leads to the potential integration of all services on one infrastructure Evolution 21 Integration 9Architecture of the Global Information Infrastructure Healtlrcare Government Services Applications Business Environmental Monitoring Education LifeLong Learning 39 Voice Data Video Multimedia Image Electronic Transactions Resource Discovery 39 High Speed Networks Switching Systems Advanced Signaling Systems Bitways Fiber Transmission Systems wireless Networks Cable Systems Satellite Systems Twisted Pair Copper Loops Broadcast Cellular Services 22 What s the Internet nuts and bolts yieW how do packet ow over the internet l millions of connected computing devices hosts endsystems gt PCs Workstations servers gt PDAs phones toasters running network apps I communication links gt ber copper radio satellite gt transmission rate bits sec Some times called bandwidth I routers forward packets chunks of data MUTEquot workstation 9 server A mobile re ionul ISP Q network mm ComyutnNztm qng A Toy Down Aypmazh mam at mrm Evolution 23 indedman hm Kurase Keith KassAddisaaneley JuJyZUUZ t rammist i 1 Backbone e g Sprtnt or Pomt of Presence ATT Pur 39 e g Spnnt or s ATT A W 5 H Tstcptmna quot Ha I39 system meme System X 50mmquot 7 Voice Image A Data Video Corporate Router Evolution 24 Modi ed mm CamputerNetwarksA s Tannenbaum W EdJ renhteHa L mus Tier1 ISP eg Sprint Sprint US beekbone networkFiber map Sprint pm We man A We We mm mm mam M men n Namemeaty mnz Internet structure network of networks 39Tienzquot 15135 smaller often regional ISPs gt Connect to one 01 mole tierl ISPs possibly oLhex erl ISPs TwenZISPs su eer T erezlsp pays F men 159 fur zzg e39xhyewr m R39me m mtercurme v res uf Internet I henZ ISP 3 cusmmeruf men pruwder pm We man A We We mm mm Mum 26 mam M men n Namemeaty mnz Internet structure network of networks l Tier 3quot ISPs and local ISPs gt last hop access network closest to and systems Local and tier 3 ISPs are customers of higher tier ISPs connecting them to rest of Internet me Cummthetwmkmg A TopDownAppmmrmmmg theintzme Evolution 27 2nd edition Iim Kumse Keith RossAddisoanesley Iuly 2002 Internet structure network of networks me Carnth Netwmkmg A Tap Dawn Appmurk mermg my Internet Evolution 28 2nd edition Jim Kumse Keith RossAddisoanesley Iuly 2002 Optical Switching I All current switches are electronic I Current switches require photon to electron conversions optical to electronic E 0 interfaces I Optical switching will eliminate these interfaces gt Faster gt Cheaper Evolution 29 Signaling I Pulses gt In the same transmission path as voice signal I Tones gt In the same transmission path as voice signal I Computer Messages gt Outside of the transmission path gt Common Channel interoffice signaling CCIS gt Signaling System 7 SS7 gt SIP gt H323 gt Others Evolution 30 Signaling cum Gammon Channel Signaling Subsmber Subsmber m m mem 7 71mm W Q Cm Cm sLIc 3 WM sLIc Subscnber m 5quotquot h Subscnber mg m 1mm 7 71mm Wcm cm sLIc sLIc Enhanced rvcs fmm Dgxtal Swmhmg and ccxs 7 mm 7 9mm 7 Intelligent Network 7 Caller Idenuhcauun 7 Speed Debug Name Mad 7 Swnched Dam rv1cs 7 Call Forwarding 7 Cnnference Canmg Autumn Callback Evolution 31 Signalingcom mgggga ing gl39tg Ngtwgzk mu mgmnmmmamn Smith D e 3 7 19m 7 m quotm m Switch x umv em Kg Swims 39v in Lm mm m Compmey wigquot g 35quot 5 Em u Coman vysxa laoy 5mm ISBN ngm 1ng mm Phnne Switch 5mm 7 7 7 7 7 Carmen 7 7 7 7 To 1 1 Value 53mm l Signaling Compqu Cznpumr Cum Cumml Comm Evolution 32 Survivability i l FIBER CUT gt Ian 4 1991 New York metro area 6 million homes without longdistance service New York Mercantile Exchange and New York Commodity Exchange shut down Fiber cuts are common I Survivability SS7 FAILURE gt June 10 1991 California 2 million homes without phone service gt June 26 1991 Baltimore10 million homes in 4 states without service amp US government phones affected I SurvivabilitySMTCH and POWER FAILURE gt September 17 1991 New York metro area 2 million homes without longdistance service 3 major New York airports close for 6 hours Evolution 33
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