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.