Gii thiu mng cng ngh th h sau NGN

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Gii thiu cng ngh mng th h sau NGNPhm Ngc nh

LOGOContentsGii thiu mng hi t NGN1Nhu cu a dng v dch v2M hnh phn lp chc nng3Thnh phn mng NGN4Phm Ngc nh

56Cc cng ngh nn tng trong NGNNGN trong mng vin thng Vit Nam

Gii thiu mng hi t NGN6.1 Mng hi t NGN: NGN l mng hi t c thoi, video v d liu trn mt c s h tng da trn nn tng ca giao thc IP, lm vic trn c 2 phng tin truyn hu tuyn v v tuyn. L s kt hp cu trc mng a dch v da trn c s h tng c sn vi s hp nht cc h thng qun l v iu khin

Phm Ngc nh

Gii thiu mng hi t NGN c im chnh ca mng NGN: Nn tng l h thng mng m: - Cc khi chc nng ca tng i truyn thng chia cc phn t mng c lp, cc phn t c phn theo chc nng tng ng v pht trin mt cch c lp - Giao din v giao thc gia cc b phn da trn cc tiu chun tng ng S dng cng ngh chuyn mch mm: (SW-softswitch) thay th cc thit b tng i phn cng. Cc mng ca tng dch v ring r c kt ni vi nhau thng qua s iu khin ca mt thit b tng i duy nht, thit b tng i ny da trn SW

Phm Ngc nh

Gii thiu mng hi t NGN Mng bng thng rng cung cp a dch v: mng truyn dn quang vi cng ngh WDH hay DWDH

Mng NGN l mng chuyn mch gi, da trn mt giao thc thng nht: Cng vi s pht trin ca cng ngh IP, ngi ta mi nhn thy r rng l mng vin thng, mng my tnh v mng truyn hnh cp cui cng ri cng tch hp trong mt mng IP thng nht, l xu hng ln m ngi ta thng gi l dung hp ba mngPhm Ngc nh

Nhu cu a dng v dch v 6.2. Nhu cu a dng v dch v: Mc tiu chnh ca dch v NGN l cho php khch hng c th ly thng tin m h mun bt k dng no, trong bt k iu kin no, ti mi ni v dung lng ty . Dch v thoi ( Voice telephony): vn cung cp cc dch v tn ti nh ch cuc gi, chuyn cuc gi, cuc gi 3 bn nhng vi cng ngh mi. Dch v d liu (Data Service): cc dch v d liu c kh nng thit lp kt ni theo bng thng v cht lng dch v QoS theo yu cu

Dch v a phng tin (Multimedia Service): cho php ngi tham gia tng tc vi nhau qua thoi, video, d liu.

Phm Ngc nh

Nhu cu a dng v dch v Dch v s dng mng ring o (VPN): Thoi qua VPN ci thin kh nng mng, cho php cc t chc phn tn v a l, c kh nng m rng v phi hp vi cc mng ring l tn ti D liu VPN cung cp thm kh nng bo mt v cc thuc tnh khc.Thng mi in t ( E- Commerce): Cho php khch hng mua hng ha, dch v c x l tin trnh, kim tra thng tin thanh ton tin, bo mt, ngn hng ti nh, i ch ti nh Cn c m rng sang lnh vc di ng (M- Commerce). y l loi dch v cho php ngi s dng tham gia vo th trng thng mi in t qua cc thit b di ng cm tay.

Phm Ngc nh

M hnh phn lp chc nng Cu trc mng NGN bao gm 4 lp chc nng: Lp truyn ti: Chc nng c bn ca lp ny l x l, chuyn vn gi tin. Lp ny bao gm cc thit b m nhim ng m gi, nh tuyn, chuyn gi tin di s iu khin ca lp iu khin v bo hiu cuc gi Lp truyn ti c phn chia lm 3 min con: - Min truyn ti thng tin qua giao thc IP - Min lin kt mng - Min truy nhp khng da trn giao thc IP

Phm Ngc nh

M hnh phn lp chc nngLp iu khin v bo hiu cuc gi: y l trung tm ca h thng thc thi qu trnh iu khin, gim st v x l cuc gi nhm cung cp cc dch v thng sut t u n cui ( end to end) vi bt c loi giao thc v bo hiu no. Cc chc nng ny c thc thi thng qua cc thit b nh Media Gateway Controller, cc Sip Server hay GatekeeperLp ng dng v dch v: Cung cp cc ng dng v dch v nh mng thng minh IN Intelligent Networks, cc dch v gi tr gia tng Trn lp ny cn s dng cc thit b nh Application Server, Feature ServerLp qun l: C nhim v cung cp cc chc nng nh gim st cc dch v v khch hng, tnh cc v cc tc v qun l mng khc.

Phm Ngc nh

Thnh phn mng NGNCc phn t ca mng NGN bao gm: Softswitch: l phn t c chc nng iu khin cuc gi, m thnh phn tng tc chnh ca n l cc Media Gateway, v cc Access Gateway thng qua cc giao thc iu khin gateway truyn thng nh MGCP/H248 MEGACO. Mt khc n cng c kh nng tng tc vi mng H323, v SIP cho php ngi s dng thc hin cc cuc gi, PC to phone, PC to PC, Phone to PC SIP Server: c vai tr chc nng nh tuyn cc bn tin bo hiu SIP gia cc SIP client. Nu trong mng ch c mt SIP server th n va ng vai tr l Proxy Server, Redirect server, Location Server

Phm Ngc nh

Thnh phn mng NGN Gatekeeper: cho php cc thu bao H323 ng k, nhn thc, ng thi gim st cc kt ni Multimedia gia cc u cui H323 Signalling Gateway: thc hin chc nng Gateway bo hiu Media Server: n cho php s tng tc gia thu bao v cc ng dng thng qua thit b in thoi. V d nh n c th tr li cuc gi, a ra mt lp thng bo c th in t, thc hin chc nng ca IVR MediaGateway: cung cp cc cng kt ni trc tip vi ng trung k ca mng PSTN v mng di ng v bin i cc lung TDM thnh nhng gi IP v ngc li. Cc Gateway ny hot ng n thun nh mt thit b kt ni trung gian, c iu khin bi Softswitch. Access Gateway: l Gateway trua cp c th cung cp truy cp dch v nh xDSL, VoDSL, POTS/ISDN IP client: l cc thit b u cui IP h tr cc giao thc H323, SIP

Phm Ngc nh

Cc cng ngh nn tng trong NGN IP: - l giao thc chuyn mch gi c tin cy cao v kh nng m rng cao. Do phng thc nh tuyn theo tng chng nn iu khin lu lng rt kh ATM: - S dng gi tin c chiu di c nh 53 byte (cell) - Nguyn tc nh tuyn : chuyn i VPI/VCI - Nn tng phn cng tc cao IP over ATM: - IP over ATM truyn thng l mt k thut kiu xp chng, n xp chng IP ( k thut lp 3) ln ATM (k thut lp 2) MPLS k thut chuyn mch nhn a giao thc: - MPLS l mt cng ngh kt hp gia chuyn mch lp 2 v nh tuyn lp 3 - Chuyn gi tin trn c s nhn qua cc ng truyn mch nhn LSPPhm Ngc nh

NGN trong mng vin thng Vit Nam Sau 3 nm nh hng v la chn n nay VNPT lp xong mng NGN giai on 1 vi c im :

Mng NGN s dng gii php SURPASS ca Siemen, vi hai Softswitch hiQ9200 t H Ni v H Ch Minh

Ba Router li H Ni, HCM, Nng c kh nng chuyn mch l 160Gbps.

C 24 PoP t ti 24 tnh v thnh ph, mi PoP bao gm mt Media Gateway kt ni vi mng PSTn phc v cho dch v VoIp, v c th c b BRAS kt ni trc tip vi thit b DSLAM-HUB vi kh nng chuyn mch 10Gbps, c th h tr cc kt ni ADSL, SHDSL

V dung lng truyn dn kt ni gia cc core router cng nh core router v router vng l 155 Mbps

Lp truyn vent ca NGN s dng cng ngh IP/MPLS

Phm Ngc nh

NGN trong mng vin thng VNPT Dch v in thoi c nh tr trc 1719: y l dch v gi in thoi ni ht, ng di trong nc v quc t vi hnh thc khch hng mua th mnh gi s dng, trn cng mt th mnh gi khch hng c th la chn thoi vi tc 64kbps hoc tc 8kbps. Dch v Toll Free 1800: Dch v ny cho php thc hin cuc gi min ph ti nhiu ch khc nhau thng qua mt s truy nhp thng nht trn mng vi cc ph thu bao gi bng cc gi ni ht. Cc ph ng di ca cuc gi s c tnh cho thu bao ng k dch v 1800 Dch v gia tng 1900: Ngi s dng dch v gi n mt s in thoi d nh do nh khai thc vin thng cung cp nghe thng tin ( th thao, thi tit) ca cng ty cung cp dch v thng tin. Mc cc cuc gi s c thu cao hn cc thoi thng thng v tin cc thu c ca ngi s dng c chia theo cng thc tha thun gia nh khai thc v cng ty cung cp thng tin. Vi dch v ny nh cung cp thng tin d dng cung cp thng tin v thi tit, th thao, th trng gi c hoc t vn v y t, gio dc. Ngoi ra cn mt s dch v khc nh: call waiting internet, dch v Web Dial Page, dch v Free call button, truy cp Internet tc cao, cung cp mng WAN IP/VPN, dch v gi thng mai quc t CFCS, dch v thoi min ph t trang web.

Phm Ngc nh

Thank You !Phm Ngc nh

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