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Connek NGN

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Ni dung Khai quat mang vin thng hin tai. Mang NGN Giai phap NGN cua cac hang inh hng phat trin VN ->2010

Ni dung Khai quat mang vin thng hin tai. Mang NGN Giai phap NGN cua cac hang inh hng phat trin VN ->2010

MNG VIN THNG HIN TI

Cc c im ca mng vin thng hin nay Tn ti mt cch ring l, ng vi mi loi dch v thng tin li c t nht mt loi mng vin thng ring bit phc v dch v . PSTN (Public Switching Telephone Network) ISDN (Integrated Service Digital Network) PSDN (Public Switching Data Network) Mng di ng GSM (Global System for Mobile Telecom) Mang di ng CDMA

S lc mng vin thng Vit Nam

Mng chuyn mch Mng vin thng ca VNPT hin ti c chia lm 5 cp, trong tng lai s c gim t 5 cp xung 4 cp. Mng ny do cc thnh vin ca VNPT iu hnh: l VTI, VTN v cc bu in tnh. VTI qun l cc tng i chuyn mch qu giang quc t, VTN qun l cc tng i chuyn mch qu giang ng di ti 3 trung tm H Ni, Nng v TpHCM. Bu in tnh qun l: Cc loi tng i c trn mng vin thng Vit Nam: A1000E ca Alcatel, NEAX61 ca NEC, AXE10 ca Ericsson, EWSD ca Siemens. Cc cng ngh chuyn mch c s dng: chuyn mch knh (PSTN), X.25 relay, ATM (s liu).

S lc mng vin thng Vit Nam

Mng truy nhp Vi tng mng cung cp dch v khc nhau m c mng truy nhp tng ng. Mng truyn dn Hai loi cng ngh l: cp quang SDH v vi ba PDH. Cp quang SDH: Northern Telecom, Siemens, Fujitsu, Alcatel, Lucent, NEC, Nortel. Cc thit b c dung lng 155Mb/s, 622 Mb/s, 2.5 Gb/s. Vi ba PDH: Siemens, Alcatel, Fujitsu, SIS, SAT, NOKIA, AWA. Dung lng 140 Mb/s, 34 Mb/s v n*2 Mb/s. Cng ngh vi ba SDH c s dng hn ch vi s lng t. Mng truyn dn c 2 cp: mng truyn dn lin tnh v mng truyn dn ni tnh

S lc mng vin thng Vit Nam

* Mng truyn dn lin tnh Bao gm cc h thng truyn dn bng cp quang, bng v tuyn. Mng truyn dn lin tnh bng cp quang: Mng truyn dn ng trc quc gia ni gia H Ni v TpHCM di 4000km, s dng STM-16/2F-BSHR, c chia thnh 4 vng ring ti H Tnh, Nng, Qui Nhn v TpHCM. Mng truyn dn lin tnh bng v tuyn: Dng h thng vi ba SDH (STM-1, dung lng 155Mbps), PDH (dung lng 4Mbps, 6Mbps, 140Mbps). Ch c tuyn Bi Chy Hn Gai dng SDH, cc tuyn khc dng PDH. * Mng truyn dn ni tnh Khong 88% cc tuyn truyn dn ni tnh s dng h thng vi ba. Trong tng lai khi nhu cu ti tng th cc tuyn ny s c thay th bi h thng truyn dn quang.

S lc mng vin thng Vit Nam

Mng bo hiu Hin nay trn mng vin thng Vit Nam s dng c hai loi bo hiu R2 v SS7. Mng bo hiu s 7 (SS7) c a vo khai thc khai thc th nghim t nm 1995 ti VTN v VTI). Hnh thnh vi mt cp STP (im chuyn mch bo hiu) ti 3 trung tm (H Ni, Nng, H Ch Minh) ca 3 khu vc (Bc, Trung, Nam) v phc v kh hiu qu. Bo hiu cho PSTN ta c R2 v SS7, i vi mng truyn s liu qua IP c H.323, i vi ISDN c bo hiu knh D, Q.931,

S lc mng vin thng Vit NamMng qun l D n xy dng trung tm qun l mng vin thng quc gia ang trong qu trnh chun b tin ti trin khai. Cc nh cung cp dch v 2 dng nh cung cp dch v: nh cung cp dch v truyn thng (ch yu l thoi) nh cung cp dch v mi (cc dch v s liu, Internet, ). Cc nh khai thc dch v truyn thng bao gm tng cng ty bu chnh vin thng Vit Nam (VNPT), cng ty vin thng qun i (Vietel), cng ty c phn vin thng Si Gn (SPT), cng ty vin thng in lc (ETC). Cc nh khai thc dch v mi bao gm VDC, FPT, SPT, Netnam,

Nhng hn ch ca mng Vin thng hin tiCh truyn c cc dch v c lp tng ng vi tng mng. Thiu mm do: Khng thich nghi c vi nhiu dch v truyn thng trong tng lai m hin nay cha d on c, mI loi dch v s c tc truyn khc nhau. Km hiu qu trong vic bo dng, vn hnh cng nh s dng ti nguyn. Ti nguyn sn c trong mt mng khng th chia s cho cc mng khc cng s dng. Dch v thoi l ch yu, pht trin ti mt mc gn nh gii hn v s cng knh Kin trc tng i c quyn lm cho cc nh khai thc gn nh ph thuc hon ton vo cc nh cung cp tng i. -> gim sc cnh tranh cho cc nh khai thc Cc tng i chuyn mch knh khai thc ht nng lc v tr nn lc hu i vi nhu cu ca khch hng. Cc chuyn mch Class5 ang tn ti lm hn ch kh nng sng to v trin khai cc dch v mi, t dn n vic lm gim li nhun ca cc nh khai thc.

-> s hi t gia mng PSTN v mng PSDN mt c s h tng duy nht cung cp cho mi dch v (tng t - s, bng hp - bng rng, c bn - a phng tin,) vic qun l tp trung, gim chi ph bo dng v vn hnh, ng thi h tr cc dch v ca mng hin nay.

Ni dung Khai quat mang vin thng hin tai. Mang NGN Giai phap NGN cua cac hang inh hng phat trin VN ->2010

MNG VIN THNG TH H MI (Next Generation Network)nh ngha???Bn c im chnh: 1. Nn tng l h thng mng m. 2. Mng NGN l do mng dch v thc y, nhng dch v phi thc hin c lp vi mng li. 3. Mng NGN l mng chuyn mch gi, da trn mt giao thc thng nht. 4. C dung lng ngy cng tng, c tnh thch ng cao, c dung lng p ng nhu cu.

Nhng vn cn quan tm khi pht trin NGN La chon phng an u t: mng NGN xp chng hay NGN mi hoan toan? QoS: cc nh khai thc s phi c kh nng cam kt cung cp cc tha thun v mc dch v (SLA), cc yu cu v bng tn v cc tham s cht lng Giao din m, nhng iu cng hm cha cc nguy c e da an ninh ca mng Hi t cc lp d liu v cc lp quang trong mng li. Mng cp quang phi ti u cho iu khin lu lng IP. Gii php qun l thch hp cho mng NGN: mi trng a nh u t, a nh khai thc, a dch v cn mang tnh logic

CU TRC MNG NGN

So sanh cng ngh

Multiplexing, Protection, and Management at Every LayerEarly 1990s IP PPP/HDLC SONET/SDH Fiber 1996 IP IP ATM/FR SONET/SDH Fiber POS SONET/SDH Fiber IP POS MPLS DWDM Fiber IP POS MPLS UCP DWDM Fiber 1997 1999 2001

ATM

POS 622Mbps

DWDM 2.5Gbps POS

DWDM Channels 10Gbps POS

MbpsPPP POS DWDM MPLS UCP

x 10Mbps

x100Mbps

Gbps

x10G

Point to Point Protocol Packet Over SONET/SDH Dense Wave Division Multiplexing Multi-Protocol Label Switching Unified Control Plane

Architecture Has Been Evolved at Every Two Years to Increase the Capacity by Ten(10)

CU TRC CHC NNG CA MNG NGNMedia Gateway controller Call Feature Server SS7 Gateway for fixed and wireless

NetManager

LNP SCP

IN

INAP Open API

Converged real time Services developed by 3rd-party supplier l tr o on C

Packet Network QoS IP, MPLS

PSTN/Mobile

MGCPMetro DWDM MPLS Backbone

Business Applicatio ns

IVRs

Web Servers

DBs

Agent Apps

MGCP MultiService Access/switc h Platform

CCS7

Legacy ACDs

l ca e pti bon O IP+ back re co

4 Metro DWDM 12

CCS7

Access Gateways RAS, VoIP, VoATMce Ac ss

BusinessVoice Games over DSLSecurityE-commerce Distance Learning

Broadcast TV & VoD

Voice over DSL Premium Internet Access

Secure VPN

Consumer

Internet Access

Video Conferencing

Lp nt ni (Access + Transport/ Core) Lp trung gian hay lp truyn thng (Media) Lp iu khin (Control) Lp qun l (Management)

Cu truc mang goc dich vu

Lp truy nhp va lp truyn taiCng ngh vng core: Cng ngh truyn dn vung mang truc da trn h thng quang DWDM. ng dung cng ngh a giao thc chuyn mach nhan MPLS va chun Metro Network vi cng ngh mi hin nay nh RPR, POS. H thng trung tm d liu h tr chuyn mach t tng 2> tng 7 vi cac chc nng chia tai chuyn mach, tich hp bao mt vi Firewall/IDS, chuyn mach ni dung... am bao quan ly cht lng QoS end-to-end cho cac dich vu trin khai trn mang truc.

Lp truy nhp va lp truyn taiCng ngh vng Edge: Co kha nng gia lp, cung cp dai rng cac dich vu ng dung nh MPLS, ATM, FR, X25, TDM. H tr phn chia lp dich vu (voice, video, cac dich vu thi gian thc va d liu), h tr bao mt va xy dng mang ring ao VPN. Cac h thng Access Gateway o H tr ca 2 loai hinh dich vu Internet Dialup, VoIP. o H tr tt ca cac loai codec thoai mi nht hin nay nh G711, G729, ... o H tr tt ca cac giao thc H323, MGCP, SIP. o H tr cac giao thc inh tuyn va QoS

Lp truy nhp va lp truyn taiCng ngh truy nhp: Cng ngh truy cp v tuyn: o Thng tin di ng, v tinh. o Truy cp v tuyn c inh bng rng. u tin cac cng ngh khng dy mi tin ti giai phap IP thun tuy nh chun Wireless MAN 802.16 va Wireless WAN 802.20. Cng ngh truy cp hu tuyn: o Cac cng ngh xDSL cap ng mi nht ADSL2+, GSHDSL+ , ReachDSL. o Cng ngh truy cp mang quang PON. o Cng ngh PLC (truyn tin hiu d liu trn dy cap in.) o Cng ngh Leased line TDM va ISDN truyn thng. Cac thit bi phia u cui mang: o IP Phone o Softphone o Router h tr chc nng thoai. o Analog voice gateway. o u cui ADSL, Wi-fi, Cable.

Lp iu khin iu khin h thng mang truc IP/MPLS Voice/SS7. ATM/SVC SS8 (bao gm SS8 signalling switch va SS8 service controller), la h thng softswitch Class 4 va Class 5 H tr cac chun va ng dung: MGC, MGCP, MEGACO/H.248, H.323, SIP proxy trn 1 nn tang thng nht.

Lp quan ly mang Bao trum va iu khin ca 3 lp trn vi cac chc nng: Quan ly ha tng mang. Quan ly dich vu mang. Quan ly dich vu kinh doanh. c im quan trong cua mang NGN la cu truc phn lp theo chc nng va phn tan cac dich vu ni dung trn toan mang. S dung rng rai cac giao din m API kin tao cac dich vu mi ma khng phu thuc nhiu vao cac hang cung cp thit bi va khai thac mang.

Cc thnh phn mng v chc nng

Media Gateway (MG) Truyn ti thng tin thoi, d liu, fax v video gia mng gi IP v mng PSTN

Cc chc nng ca mt Media Gateway : Truyn d liu thoi s dng giao thc RTP (Real Time Protocol). Cung cp khe thi gian hay ti nguyn x l tn hiu s (DSP) di s iu khin ca Media Gateway Controller (MGC). ng thi qun l ti nguyn DSP cho dch v ny. H tr cc giao thc c nh loopstart, ground-start, E&M, CAS, QSIG v ISDN qua T1. Qun l ti nguyn v kt ni E1.

MGC

MGC l n v chc nng chnh ca Softswitch. x l cuc gi, iu khin SG thit lp v kt thc cuc gi. Giao tip vi h thng OSS v BSS. MGC: cu ni gia cc mng c c tnh khc nhau, nh PSTN, SS7, mng IP. Quan l lu lng thoi v d liu qua cc mng khc nhau. MGC kt hp vi MG, SG to thnh cu hnh ti thiu cho Softswitch.

Signalling Gateway (SG) Signaling Gateway kt ni gia mng bo hiu SS7 vI mng IP di s iu khin ca Media Gateway Controller (MGC). SG lm cho Softswitch ging nh mt nt SS7 trong mng bo hiu SS7. Nhim v ca SG l x l thng tin bo hi

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