HC VIN CNG NGH BU CHNH VIN THNG -------------------------- V Hu Hng NGHIN CU DCH V IPTV TRN NN IMS V XUT PHNG N TRIN KHAI TRN MNG VIN THNG H NI Chuyn ngnh: K thut in t M s: 60.52.70 TM TT LUN VN THC S H Ni nm 2012 1Lun vn c hon thnh ti: HC VIN CNG NGH BU CHNH VIN THNG Ngi hng dn khoa hc:TS. Mnh Quyt Phn bin 1:.. Phn bin 2:.. Lun vns c bo vtrc Hing chmlunvnthc s ti Hc vin Cng ngh Bu chnh Vin thng Vo lc:....... gi ....... ngy ....... thng ....... .. nm 2012 C th tm hiu lun vn ti: - Th vin ca Hc vin Cng ngh Bu chnh Vin thng 2M U Cng vi s bng n ca cc cng ngh mi v nhu cu sdngdchv vinthng cakhchhng, mngvinthng c nhng bc tin vt bc. Hin ti v trong tng lai nhu cuphttrinccloihnh dchvInternetvcbitl cc loi hnh dch v bng rng ngy mt tng v khng th tch ri isng x hi. thamn nhu cumngvin thng i hi phic cu trc hin i linhhot v nht l tha mn mi nhu cu v dch v a phng tin. IPTV l dch v truyn hnh qua ktni bng rng da trn giao thc Internet. y l mt trong cc dch v Triple-play m cc nh khai thc dchvvinthnganggiithiutrn phmviton thgii. Orange/FranceTelecomkh thnh cng vigi dchv Orange TV ti Php, Hn Quc m rng IPTV racnc,PCCWthnhcngvidchvIPTVtiHng Kng,NokiaSiemensNetworkstrinkhaiIPTVtiBaLan (4/2007),IPTV v angphttrinvitcrtnhanh,d kinnnm2012sthu bao IPTV trn ton thgiist 92,8 triuvitctngtrnghngnml31%,trongkhi nm2008consny chl 24 triu.Trong,slngthu bao ca khu vc chu s t gn 40 triu thu bao.Xu hng pht trin mng th h sau NGN hin nay l chuyn t Softswitch sang IMS do IMS em li kh nng cung ngdchvaphngtinchongisdngucuim khng b ph thuc vo v tr, cng ngh truy nhp mng v vo thit b u cui ca ngi s dng. IMS h tr cc loihnh dchvkhc nhau (thoi, d liu, hnh nh v kh nng tch hp ca c ba loi hnh dch v 3ni trn - Tripple Play m in hnh l dch v IPTV). Cc cng ngh mng v cc thit b u cui. c bit, trn nn tng IMS, yu t di ng v truy nhp khng dy tr nn kh thi, cng to iu kin cho IPTV pht trin thnh mt trong nhng dng dch v Quad-Play.Hin nay vin thng H Ni ang trin khai cung cp cc dchvIPTVtheokintrckintrcnon-NGN-based IPTV, da trn h thng IPTV Middleware vi mng truy nhp MAN-E, xDSL... Tuynhindoccuiukhindchvring bit dnnsphc tp caton h thng. Mt khc mng truy nhp do suy hao ln nn c ly cung cp dch v b hn ch, cht lng dchvcn thp, nidungcha a dng phong ph nn cha cnh tranh c vi cc dch v truyn hnh khc. Do vy vi mc tiu nm bt c cc vn lin quan ti truyn hnh IPTV, cc vnlinquannphnhIMSvcbitl nghin cu phng n trin khai IPTV trn phn h li IMS xut p dng trin khai ti VNPT H Ni trong thi gian ti, nhm khc phc nhng hn ch ca vic cung cp dch v IPTV hin nay ng thi nng cao kh nng cung cp cc dch v mi thuhtkhchhngbplidchvthoitruynthng angbsuygimmnh.tic xy dng theo nidung nh sau: Chng 1: Kin trc IMS Chng 2: Cng ngh IPTV trn nn IMS Chng 3: xut phng n trin khai IPTV trn nn IMS ti VNPT H Ni. 4CHNG 1 KIN TRC IMS 1.1. Qu trnh hnh thnh v pht trin IMS 1.1.1 Khi nim IMS PhnhaphngtinIP(IMSIPMultimedia Subsystem)lmtkintrcmnglidatrnnnIPgm nhiu chc nng c gn kt vi nhau thng qua cc giao tip cchunhanhm cungcpccdch v a phng tin qua vng chuynmchgiIPcbn.IMSccoinhkin trc cho vic hi t mng thoi, d liu v di ng. Hnh 1.1 Kin trc phn h IMS 1.1.2 Qu trnh pht trin ca IMS IMScdnhptcvvinthngthhth3 (3GPP 3rd Generation Partnership Project) gii thiu u tin trong phin bn th 5 (Release 5) vo thng 3/2002 vi cc tnh 5nngxlcucgicbn.unm2004,3GPPtiptc chunhaIMSviRelease6. NhngktquchunhaIMS trong Release 6 ca 3GPP c ETSI TISPAN s dng thc hinchunhaphin bnNGNR1.y ccoinhmts khiuchohitcnh- dingtrongIMS. Release 7 c3GPPchunhatheo3phavchonthinvo khongthng3 9/2007 htrchotruynhpvimngbng rngcnh.Thng 6/2007, ETSI TISPAN kthpvi3GPP tiptcchunhaxydngcutrcmngIMSchung nhm h tr cc kt ni c nh v cc dchv mi nh IPTV. Cutrcnycchunhabtutphin bnRelease8. u nm 2008 phin bn Release 9 bt u c chun ha vi mtstnhnngnh:Giiphpchodchvthoiv video trong min chuyn mch knh (CS Circuit Switch), tnh nng h trdingWiMAX- LTE, WiMAX UMTSTnh n thi im hin ti Release 11 v Release 12 vn ang pht trin hon thin hn kin trc phn h IMS. 1.1.3 Cc yu cu trong phn h IMS C ththyrngmctiu xy dngmngIMSnhm: T hp cc xu hng cng ngh mi nht; Hin thc Internet di ng;Tocshtngchungtrinkhainhiudchva phngtin;Tomtcchtnglinhunnhvicbsung dch v trn mng di ng. t c mc tiu 3GPP a ra 6 yu cu c bn cho mng li IMS nh sau:Thit lp cc phin a phng tin IP Qun l m bo cht lng dch v - QoS 6H tr lin mng Chuyn vng iu khin dch v To dch v nhanh chng v a truy nhp 1.2. Kin trc IMS 1.2.1 Kin trc v chc nng cc thnh phn trong IMS IMS m t mt cu trc lp vi cc chc nng mng c thtimilp,nhngkhngnhnghaccthnh phnhay thit bmng cung cp cc chcnng . Cc nh cung cp c th ty thit k cc thit b nhng phi tun theo cc giao din chun c th kt ni, hot ng tng thch vi thit b IMS ca nh cung cp khc. 1.2.1.1 Lp dch v + AS (Application Server):my ch ng dng l ni cha ng v vn hnh cc dch v IMS. +SLF(Subscriber LocationFunction): trong trng hp c nhiu HSS trong cng mt mng, chc nng nh v thu bao SLF scthitlpnhmxcnhHSSnoangcha h s ca thu bao tng ng. +USPF(UserProfileServerFunction): hay cn gi l HSS (Home Subscriber Server) l trung tm cha ton b d liu lin quan n thu bao. +Charging: IMS htr chaiphng thc tnh cc online v offline. 71.2.1.2 Lp iu khin+ Chc nng iu khin cuc gi CSCF CSCF c 3 loi: Proxy-CSCF (P-CSCF), Serving-CSCF (S-CSCF) v Interrogating-CSCF (I-CSCF). Mi CSCF c chc nng ring. Chc nng chung ca CSCF l tham gia trong sut qu trnh ng k v thit lp phin gia cc thc th IMS. Hn na,nhngthnh phnny cn c chcnnggidliutnh cc n Server tnh cc. C mt vi chc nng chung gia P-CSCF v S-CSCF trong hot ng l c hai c th i din cho userktthc phin v c thkim tra nidungca bntin trong giao thc SDP.+ChcnngChcnngiukhincngchuyn mng BGCF (Breakout Gateway Control Function) Chcnngiukhincngchuynmng(BGCF)L mtmych SIP cha ngchcnngnh tuynda trn s inthoicnhimvlachnmngPSTNhocmng chuyn mch knh (CSN) m lu lng trong IMS s c nh tuynsang.NuBGCFxcnhcrnglulngchuyn mng s ti mng PSTN hay CSN nm trong cng mng vi BGCF th n s la chn mt MGCF p ng cho lin mng viPSTN hay CSN.Nululngcntruyntimtmng khng nmcngmngviBGCFthBGCF sgibohiu phin ny ti BGCF ang qun l mng ch .+ChcnngiukhincngphngtinMGCF (Media Gateway Control Function) 8MGCF l thnh phngateway caPSTNhayCSNv mng IMS. Nt ny c nhim v qun l cng phng tin, bao hm cc chcnngnh:linlcviS-CSCFqunlcc cuc gi trn knh phng tin, lm trung gian chuyn i gia giao thc bo hiu ISUP v SIP. +ChcnngiukhinktnibinIBCF (Interconnection Border Control Function) IBCF iukhinbin gia 2 domain ca nh cung cp dch v khc nhau; cho php tng tc gia cc ng dng IPv6, IPv4. ni topomng,chcnngiukhin truyn ti, thng tin v bo hiu SIP, la chn cc tng tc bo hiu ph hp v to ra cc bn ghi cc. Ty thuc vo cu hnh, IBCF cn thc hin chc nng chuyn tip bo hiu.+ChcnngtinguynphngtinMRF(Media Resource Function) MRFcphnthnhbiukhinchcnngti nguyn a phng tin MRFC v b x l chc nng ti nguyn a phng tin MRFP. MRFC l khi trc tip giao tip vi AS quagiaothcSIPvviS-CSCFquagiaothcMEGACO /H.248. MRFP nhn thng tin iu khin t MRFC v giao tip vicc thnh phn ca mng truyndn. MRF c vai tr quan trng trong hi ngh a im phn b ti nguyn hp l. 1.2.1.3 Lp truyn ti +ThnhphncngphngtinIMS(IMS- Media Gateway) 9IMS-MGW l thnh phngiaotipvimngchuyn mchknh,ncung cpmtphnglinktchongidng IMS v CSN. N xc nh knh truyn t CSN v dng truyn dn t mng, thc hin vic chuyn i gia nhng u cui v thchingiim v xltnhiuchomt phngngidng khi cn thit.+SGSN (Signaling GPRS Support Node) SGSN l thnh phnlin ktgiamngIMSv mng chuynmchgihinc.Ncthhotng,iukhinv x l lu lng cho min PS. Phn iu khin c hai chc nng chnh: qun l di ng v qun l phin.+GGSN (Gateway GPRS Support Node) Khichcnngny cung cpkhnngtngtcvi nhngmngPSkhcnhaunhmngIMShocInternet.N chuyninhnggiGPRSntSGSNthnhnhdng PDP tng ng v gi chng ra ngoi trn mng ngoi tng ng.Tronghngngcli,achPDPcagidliun c chuyn i thnha ch IMS ca ngi dng ch.+ NASS (Network Attachment Subsystem) NASSlthnhphnchsdngchoccmngtruy nhp hu tuyn, vi nhim v cung cp kt ni n ngi dng trong mng truy nhp. +RACS(ResourceandAdmissionControl Subsystem) Chcnng iukhinti nguyn v chp nhnkt ni 10RACS bao gm2chcnngchnhl: chcnngquytnh chnh sch dch v (S-PDF) v chc nng iu khin chp nhn kt ni v ti nguyn truy nhp (A-RACF).1.2.2Cc im tham chiuim tham chiu IMS c nhim v l im ni gia cc thc th trong v ngoi mng IMS, trao i cc thng tin v bo hiu.Cnhiuloiimthamchiukhcnhaucsdng trong IMS.1.2.3Cc giao thc s dng trong IMS 1.2.3.1 Giao thc SIP 1.2.3.2 Giao thc DIAMETER 1.2.3.3 Giao thc m t phin SDP1.2.3.4 Giao thc Megaco/H.248 1.3 Mt s th tc trong IMS Phn ny m t qu trnh ng k n thit lp phin sdngdchvcamtUE.Qutrnh ny slinquann nhiu thc th trong IMS. u tin UE phi thc hin vic ng k vi h thng mi c th s dng c dch v. Ty thuc vo trng thi ca UE m S-CSCF s phn phi ph hp.1.3.1 Th tc khi to phin 1.3.2 Th tc xa ng k khi to phin bi UE 1.3.3 Th tc xa ng k bi nh khai thc mng 1.3.4 Th tc thit lp phin 11CHNG 2 CNG NGH IPTV TRN NN IMS 2.1. Tng quan v cng ngh IPTV 2.1.1 Khi nim v IPTV IPTV(InternetProtocolTelevision),truynhnh qua giao thc Internet cnhnghal cc dchva phngtinnhtruynhnh/video/audio/vnbn/ ha/sliutruyntitrnccmngdatrnIP,c kim sot nhm cung cp mc cht lng dch v, mn nguyn, bo mt v tin cy theo yu cu. 2.1.2 Kin trc h thng cung cp dch v IPTV End SystemHthngphn phi ni dungNgun cungcp ni dungl a t i gi dMngtruyn ti IPhi n t hy u cuHthng MiddlewareHthngHead-endQun l bn quyn s (DRM)Lu trni dung(VoD server) iu khin phn phi ni dungCp pht ni dungX l a phngtinTngtc dch v iu khin cung cp dch vTng thch ni dungTp h p ni dung iu khin cungcp ni dungH sngi d ngH sdch vH sni dungThmquyn vxc thcQun l bn quyn ni dung nh h ng dch vProxy qun l bn quynMy trm ngdngHthng qun l vtnh c cMng nh Hnh 2.1.M hnh kin trc h thng cung cp dch v IPTV 12+Ngun cung cpnidung: cung cp ngun d liu thu, nhnv x l ccdliuchng trnh t cc ngunkhc nhaunhvtinh,truynhnhmttv cc ngunkhc chuyn sang h thng Head-end. +HthngHead-end: Thu,iuchv giim ni dung hnh nh v m thanh t cc ngun khc nhau v s dng cc thit b m ha (encoder) chuyn i ni dung ny thnh cc lungdliuIPkhun dngm ha mong mun.Hin nay tn hiuvideochyucm ha MPEG-4 hocH.264 m bo tc kh thp, cho php trin khai tt trn mng truy nhp xDSL. + H thng Middleware: Thut ng Middleware c dng m t cc gi phnmm linquan n vic phn pht dch v IPTV. Middleware c kin trc client/server in hnh, trong clientnm set top box.N cung cp kh nngqun l thu bao, nidung v bo co hon chnh cng vi cc chc nngqunlEPGvSTB,ngthivnduytr tnh mcho vic tch hp cc dch v trong tng lai.+Hthngphnphinidung: Bao gmcccm my chVoDv cc hthngqunlVoDtngng,cho php lu tr cc ni dung c m ha v thit lp cc chnh schphnphinidungmtcchmmdo.Hthngny thng c thit lp phn tn, cho php nh khai thc m rng mtcchkinht,ph hpvitiv yu cudchvcacc thu bao. My chVoD slunidungthcv cung cp cho thubaokhinnhncsxcthcdanhtnht Middleware. 13+ H thng qun l bn quyn s (DRM):DRM gip nh khai thc bovnidung camnh, nh trncc tnhiu truyn hnh hay m ha ni dung VoD, khi truyn i trn mng Internet v tch hpvitnhnnganninh ti STB pha thu bao. DRM dng bo mtnidung cc kha gii m ca cc thu bao.+ Mng truyn ti: Mng truyn ti ng vai tr quan trngnht trong ton b h thngcung cp dch v IPTV. Kh nng p ngv bng thng ca mng truyn ti s quyt nh n s thnh cng cho dch v IPTV cung cp. Mng truyn ti chnh l htngmngIPbngrngtruyndchvtnh cung cp dch v IPTV n khch hng. +Hthng qunlmngv tnhcc: H tr qun l mng v tnh cc cho dch v IPTV ca khch hng. +Set-top Box (STB):csdng ktniIPTV headend viTV. Chcnngchnhcabphnny l hiuv chuyniccyu cut cc thubao sau gi cc bn tin ti headend, cc dch v v cc ni dung yu cu ring. Set top box s nhn cc ni dung c m ha v gii m chng. 2.1.3 Cc c tnh ca IPTV +H tr truyn hnh tng tc +Khng ph thuc thi gian + Tng tnh c nhn +Yu cu v bng thng thp +Kh nng truy nhp trn nhiu loi thit b 14+Cung cp nhiu dch v tin ch 2.2. Cng ngh IPTV trn nn IMS 2.2.1 S pht trin kin trc IPTV theo hng IMS NGN Sphttrinny bao gmmtqutrnh gmbnbc nh sau: Hnh 2.3.Cc bc pht trin chnh ca IPTV Kin trc non-NGN-based IPTV :Gii php IPTV trn c s non-NGN hin ang trin khai trn thtrng.Tronglpiukhindchvv ngdng cthitkring bit(nhIPTVMiddleware)cungcp cc dch v IPTV. Kin trc IPTV da trn NGN non-IMS: Kintrc IPTV trn c s NGN.Chophp tng tc v hptclm vicqua ccim thamchiuchungia cc ng dng IPTVv vi thnh phn NGNchung ang tn ti. Nhng thnh phnny gmccyutiukhintruyntichovic 15thanhnngunviukhinphnh(RACS)hocphnh gn vi mng TISPAN (NASS). Cch tip cn ny s dng mt phn h dnh cho IPTV trong NGN cung cp tt c cc chc nng yu cu IPTV cn thit. Kin trc IPTV da trn IMS-NGN KintrcIPTVtrn nnIMS.Xcnhccchcnng IPTVchtrbiphnhIMSv thchinnhngchc nngnycho php ti s dng cc chcnngIMS v cng to s khi to dch v v iu khin trn c s SIP. Kin trc hi t non-IMS v IMS IPTV y l kt hp v hi t gia hai kin trc IPTV da trn IMS v non-IMS trongmtcuhnhchung cungcpcc kiu hi t ca cc dchv IPTV. Ngoi ra trong kin trc ny cn tch hpcctnhnngqunlvnhnhhthngmng (OSS) v qun l khch hng, kinh doanh, tnh cc (BSS). 2.2.2 u im ca kin trc IPTV trn nn IMSIPTV datrn IMS-NGN c nhiuuimnhhtr tnhnng di ng, tng hvi cc dch v NGN, c nhn ho dchv,tngthchphngtinv cc dchvdingnh cc dch v quadruple-play.Hnna, vi vic ngdng v ti sdng c tnh IMS snchtr ccdchvIPTV,c thti u hov ti s dng cc c tnh NGN v nhng vn sau: -ngk v nhn thcngidng tch hp (vd, bo pht sign-on n, nhn dng ngi dng ng nht). 16-Qunl thu bao inthoi ca ngi dng, tp trung h sngidng, chnhsch ngi dng linh hot v c nhn ho dch v. -Qunlphin,nhtuyn,khiudchv(service trigger), nh s. -Tngtcviccnhchophpdchv(hindin, nhn tin, qun l nhm) -H tr Roam (chuyn vng) v Nomadic (Lu ng). -Cht lng dch v (QoS) v iu khin ngang hng. -Ghi cc (billing) v tnh cc ng nht. Ngoi ra, IPTV datrn IMS-NGN cn cho php tng thch gialung dliu IPTV viccti nguyn mng sn c v khnngktcuingidng. Do vy,ngidng c th truy nhp dch v IPTV khng ch nh m c khi di chuyn s dngmtucuiding.Do,IMS-NGN-basedIPTV cng cho php hi t gia c nh v di ng. 2.3.Giiphppht trinng dngIPTV trnnnIMS ca TISPAN 2.3.1 Cc thnh phn chc nng a)Chc nng iu khin dch v (SCF) Chc nng ny x l yu cu v IPTV, n ng vai tr l phntiukhinphin v dchvcattcccdchv IPTV. Thnh phn chc nng ny cng chu trch nhim tng tc vi li IMS-NGN trn lp iu khin dch v. 17 Hnh2.8Kin trc IPTV trn nn IMS ca TISPAN b)Chc nng iu khin phng tin IPTV (MCF) ChcnngphngtinIPTVbaogmchcnngiu khin phng tin (MCF) v chc nng phn phi phng tin (MDF). Mtnguyn l thitkquan trngivichcnng ny l kin trc phn phi phng tin phn cp v linh hot. c) Chc nng phn phi phng tin IPTV (MDF) Tnhnngphnphiphngtinbao gmba phnt chc nng sau:-Interconnect (I-MDF): chcnngny xlnidung phng tinv nhp nidung CoD,metadata v nh cung cp dchv,ngthitipnhncclungtrctiptucui 18IPTV hay tipnhntrctiptccngunti nguyn canh cung cp ni dung. -Serving (S-MDF): chcnngny xlquytrnh ca nidung(m ho, bovnidung,chuynm sang cc dng thckhc),lutrnidungv metadata cng vivictruyn b thng tin ni dung trong IPTV IMS. - Primary (P-MDF): chcnngnylimlinlcs cp, n cung cp cc tnh nng streaming cho tt c cc dch v theonhdng,chtlngyu cuviphngthcphtc th (pht a im/ pht duy nht/qung b). d)Chc nng la chn vpht hin dch v Chcnngphthinv lachndchv(SDFv SSF) cung cp thng tin yu cu i vi mt UE la chn dch v. Nhim v ca SDF - Cung cp thng tin i km vi dch v; - Pht hin dch v c nhn; Thngtin ikmdchvbaogm cc a ch SSF di dng cc URI hoc a ch IP. Nhim v ca SSF - Cung cpthngtinlachndch vcnhnv thng tin cnthitcthhoviclachndchv.SSFcth pht thng tin ny mtcchtu.Trnghpthngtinla chndchvl thng tin c nhn th n phicphnphi qua ch unicast. Ngc li, thng tin ny s c phn phi qua ch multicast. - Cung cp thng tin trnh din la chn dch v mt cch tu chn qua ch unicast. 19e)UPSFUPSFlutrhsngidng IMS vdliuhs chuyn dngchoIPTV.Ngiaotipvithcthchcnng iu khin dch v IPTV ti im tham chiu Sh v vi li IMS-NGN ti im tham chiu Cx. 2.3.2 Hot ng cung cp dch v IPTV da trn IMS Hnh 2.9 M hnh cung cp IPTVda trn IMS 2.3.2.1 Hot ng pht hin dch v Ch y (Push mode) Ch ko (Pull mode) 2.3.2.2 Hot ng khi to phin CoD 2.3.2.3 Hot ng kt thc phin CoD 2.3.2.4 Hot ng khi to phin BC bi UE 202.3.2.5 Hot ng khi to phin BC bi SCF 2.3.2.6 Hot ng kt thc phin BC 2.3.3 Cc im tham chiu C 5 giao din chuyn dng cho IPTV trn IMS-NGN. a) im tham chiu Xa imthamchiuXanmgiaUEv SSF. Giao thc gia UE v SSF l HTTP. b)im tham chiu Xc Xc limthamchiunmgiaUEvMCFthay i cc bn tin iu khin phng tindnh cho lung phng tin IPTV. Giao thc gia UE v MCF l RTSP. c) im tham chiu Xd Xd l im thamchiu nmgiaUE v thc th MDF csdngphnphidliuphngtin.Giaothcs dng l RTP. d) im tham chiu y2 im tham chiu y2 nmgia S-CSCF v MCF, mang cc bn tin bo hiu iukhindch v IPTV pht t CSCF iu khin MCF. S dng cc giao thc SIP/SDP. e)im tham chiu Xp imthamchiuXpnmgiaMCFvMDF,iu khinccphin phn phi phngtin h tr vic thit lp phin khi nidungcphnphiquamtv nhiuthcth chcnngphnphiphngtin. Sdnggiaothc Megaco/H248. 21CHNG 3 XUT PHNG N TRIN KHAI IPTV TRN NN IMS TI VNPT H NI 3.1 Tnh hnh cung cp dch v IPTV hin nay ti vin thng H Ni Tnhnhtnm2011sthubaobngrngcnh caVNPT H Ni t khong 360.000thu bao cc loi. Thu bao IPTV nm 2011 pht trin thm 11.000 thu bao, nng tng sthu bao IPTV caVNPTH Niln gn20.000thu bao. MtsdchvbngrngphbinhinVNPTH Niang cung cp gm: dch v MegaVNN trn cp ng,dch v Fiber MegaVNN, dch v Internet FTTH. 3.2.1 Cu trc h thng cung cp dch v IPTV (MyTV) Hin nay VNPT H Ni c cc hnh thc cung cp dch v MyTV sau: - MyTV dng chung thit b vi MegaVNN, khng chung cp vi in thoi. - MyTV dng chung thit bvi MegaVNN, dng chung cp vi in thoi. - MyTV dng chung thit b vi Internet FTTH. - MyTV dng ring cng xDSL cp ng. - MyTV dng ring cng MAN -E, GPON. - MyTV dng chung cp vi in thoi c nh. GiaionhinnayVNPTHNichcungcploi hnhdchvMyTVdngchungthitbviccdchv MegaVNN. 3.2.2 Cc vn tn ti v hng khc phc 22Vn ni dung Vn cht lng truyn hnhVn tch hp gi dch v 3.2 Tnh hnh trin khai IMS hin nay ti VNPT H Ni VNPT la chn xy dng IMS theo gii php ca hng Alcatel-Lucent.Tronggiaionutrinkhaihinnay VNPT michcungcpdchvinthoicnhVoIPtrn nn IMS v mt s dch v gi tr gia tng khc. Ti VNPT H NiBtutthng5/2012 chnh thctrinkhaidchv VoIP trn nnIMScungcpngthicng vidchvtruy nhp Internet.3.3xutphngntrinkhaiIPTVtrnnnIMSti VNPT H Ni 3.3.1 xut xy dng cc thnh phn chc nng a,Cctiuchkhitrinkhaixydng: Sdnggiao thc SIP cho cc phin a phng tin , kin trc c m un ha,ddngtchhp vi mngvinthng c vccdch v tn ti, trung tm h thng thanh ton phi da trn gii php OSA, d dng tng thch vi cc dch v bn th bab, Phng n xy dng cc thnh phn chc nngTmhnh kintrcIPTV/IMSca TISPAN,tkin trc cung cpdchvIPTVhinnay,ngthidatrn cc tiu ch trn ta c thcxydnghthngIPTVtrn nn IMS cho VNPT H Ni nh hnh 3.6 di y23-ivivicxydngccthnhphnchcnng: Gmccserverla chnv pht hindchv (SD&S server), thnh phniukhindchv(SCF),thnh phniukhin phn phi phng tin (MCF) v cc server phn phi ni dung (MDF) hin ang s dng cung cp cc dch v IPTV c bn thcnphinngcpphncng,phnmmhocthaymi nhm b xung, h tr cc giao thc kt ni (nh giao thc SIP, Diameter...)ktnigiacc thnh phnvinhau v kt ni n li IMS. Dch v IPTV c bnIPTV MiddlewareCore IMSIP TransportPhn phi phng tin (MDF)VoD ServerVideo/musicNi dungNi dung khcCung cp ni dungiu khin phn phi phng tin (MCF)Cc chc nng qun lServer SD&S(EPG/ECG)DRMIPTV STBLive TVTVEncoderKhch hngSIP ClientDch v IPTV c nhnDch v IPTV trn nn IMS Hnh 3 .6 xut m hnh xy dng h thng IPTV trn nn IMS cho VNPT H Ni - i vi h thng phn phini dng MDF: Do mng vinthngH Nilncbitkhistnhpnn thnh phn phn phinidungcnxydngtheomhnh phn tn gim ti lu lng chy qua mng li.- ivihthngqunlvgimst:xutxy dng cc Modul thc hin cc chc nng sau : Qun l an ninh, 24qunlbnghi,qunlcnh bo, qunlthitbvmun cu hnh. - Vphamngkhchhng: Cnphibxungthnh phnthchinchcnnggiaothcSIPphaucuikhch hng theo hai m hnh cung cp: Set-top-box c h tr SIP v Set-top-box khng h tr SIP. 3.3.2 xut phng n cung cp dch v a,xutnngcp,xydngnidung: Hinnays lngthu bao IPTV caVinthngH Nicn rthnch, chkhong4%tngsthubaobngrngcnhangs dng IPTV. C nhiu nguyn nhn nhng nguyn nhn chnh l vnnidung.V vytrinkhaithnh cng MyTV trn nnIMS,th trctin phixydngcccchngtrnh nidungadngphongphnhngphimboccyut ring bit,this.CthVNPTH Nicnhptcsnxut mtsknh truyn hnh qungbcquynchcMyTV (V d nh cc knh v sc khe, y t, mn n bi thuc...).b, xut trin khai b xung cc dch v mi: Theo xu thchungcathtrnghinnaycbadchvangc khch hng quan tm nhiu.Mtl dchv an ninh nh ring, an ninh trong cc ta nh, vi dchv ny mt lot Camera lp t trong ta nh s c kt ni vi hp Set-top-box thng qua pht WiFi. Hai l dchvnhntintrctipquaTivi,dchv nycbitph hpvila tui thanh thiu nin, ngoi ra n cncsdngbuchntrctiptrongccchng trnh Live TV. Ba l truyn hnh hi ngh, y l mt ng dng rthuchchoccdoanhnghipvcccsgiodctham gia vo qu trnh o to.25KT LUN Phn hIMScxydngnhmcungcp,kthp cc dch v a phng tin v hi t di ng-c nh. Trong IPTV l dch v c pht trin trn nn IMS c trng cho s hi t gia thoi, s liu v bng rng.Lun vn lm r 1 s vn sau: Tng hp c nhngkhi nim c bn v IMS. Cu trc chc nng cc phn t trong IMS, cc giao din trong IMS cc giao thc quan trng s dng trong phn h IMS. Tm hiucvkhinimIPTV,cutrcv cc thnh phn h thng cung cp dch v IPTV hin nay. Tm hiu l trnh pht trin IPTV trong thi gian ti, trong tp trung vo kin trc IPTV trn nn IMS. a ra c cc u im ca kin trc IPTV trn nn IMS/NGN so vi cc kin trc khc: non-NGN, non-IMS. NghincugiiphpIPTV/IMScaTISPAN, nm bt c cu trc h thng, cc thnh phn chc nng, m hnh cung cp dch v v cc giao thc tng ng vi tng giao din c s dng.Nmbtctnh hnh trinkhaiIMShin nay ca Vin thng H Ni. Hng trin khai cc dch v trn IMS trong thi gian ti. ng thi nm bt c tnh hnh cung cpIPTVhinnaycaVNPTH Niccvn cn tn ti v xut mt s bin php trin khai IPTV trn phn h IMS trong thi gian ti.