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SVTH: L QUANG TM LP: D10CQVTA1 Trang

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Chng 1: Cu trc mng NGN ti VTN

1.1 nh ngha mng NGN:

Theo nh ngha ca ITU th mng NGN l mng chuyn mch gi m c th cung cp

cc dch v vin thng v c th s dng cc loi bng thng rng , cc k thut truyn

ti lu lng m bo QoS m trong cc chc nng lin quan n dch v th c lp

so vi cc k thut lin quan truyn ti lp di.

Mng NGN cho php ngi dng truy cp khng gii han ti cc mng, cc nh cung

cp dch v (ISP) v cc dch v m h mong mun. Mng cng h tr tnh di ng cho

php cung cp cc dch v ph hp v ph bin cho ngi s dng (GSM, Wireless

lan...).


Hnh 1.1: M hnh mng th h trc NGN (pha trn) v mng NGN (pha

di).

Hnh 1.2: Cu trc mng NGN tng qut c trin khai trn thc t.

1.2 Cu trc mng NGN ti VTN:


Hnh 1.3: M hnh cc lp mng NGN ti VTN

Lp ng dng dch v (Application layer): Cung cp cc dch v VoIP,

Web-dial page, dch v kt ni

Lp iu khin (Control layer): iu khin lp chuyn ti v lp truy cp.

Vi NGN Siemens l cc softswitch HiQ 9200 ti H Ni v HCM .

Lp chuyn ti (Transport layer): Lm chc nng chuyn mch v truyn

dn. Vi NGN Siemens gm 3 Core Router T1600 v cc truyn dn quang

STM1/STM16 ni vi nhau v ni cc Edge Router ERX cc tnh.

Lp truy cp (Access layer): Gm ton b cc nt truy cp nh cc thit b

BRAS, DSLAM, v Media Gateway.

Cu trc mng NGN ti VTN:

[CHN HNH VO]

Cc phn t trong mng NGN trn gm c:

- Core Router T1600 (Juniper).

- Edge Router MX 960 (Juniper) v Alcatel Lucent 7750.

- BRAS Router ERX 320 (Juniper).

Core Router T1600 (Juniper):


Hnh : Mt trc ca router T1600


Hinh : Mt sau ca router T1600.


Juniper Edge Router MX 960

Router MX960 l router bin (PE) cung cp 2 chc nng chuyn mch (switching) v

nh tuyn (routing). Dung lng ca router ny ln n 1320 gigabits mi giy (Gbps),

truyn full duplex. Router MX960 cho php 1 lng ln cc ng dng v dch v dnh

cho doanh nghip v dn dng, bao gm truyn ti tc cao, cc dch v VPN, truyn

ti dung lng ln gia cc data center.

Router MX 960 cung cp vic d phng v kh nng phc hi. H thng phn cng th

hon ton c d phng bao gm d phng ngun, qut, b phn nh tuyn (Routing

Engine) v bo iu khin chuyn mch (Switch control Boards)


Hnh : Mt trc chi tit ca router MX960.


Hnh : Mt sau chi tit ca router MX960.

Router Edge Alcatel Lucent 7750:


BRAS Router ERX 320 (Juniper):

Bras definition:

Router ERX320 overview:


Cc dch v lin quan n MPLS trin khai trn nn NGN ti VTN:

1. Dch v VPN/MPLS:

Dch v VPN, cn gi l dch v Mng ring o (Virtual Private Network) l gii

php cng ngh cho php thit lp mt mng dng ring ca khch hng trn nn

mng vin thng sn c. VPN cung cp kh nng truy cp vo mng trung tm ca

t chc cho cc chi nhnh, vn phng hoc ngi lm vic khp mi ni.

Cc cng ngh xc thc, an ton, m ha v bo mt gip gi kn mi d liu trao

i, ngn chn vic tit l thng tin khi cc bn khng c thm quyn v truy cp

tri php.

2. Knh thu ring

Dch v knh thu ring l dch v cho thu knh truyn dn vt l dng ring

kt ni v truyn thng tin gia cc thit b u cui mng ni b, mng vin

thng dng ring ca khch hng ti hai a im c nh khc nhau.

Dch v knh thu ring p ng c cc nhu cu kt ni trc tip theo phng

thc im ni im gia hai u cui ca khch hng.

3. Truyn hnh hi ngh:

Hi ngh truyn hnh (Video conference) l mt bc pht trin t ph ca cng

ngh thng tin, cho php nhng ngi tham d ti nhiu a im khc nhau c

th nhn thy v trao i trc tip vi nhau qua mn hnh tivi nh ang hp trong

cng mt cn phng.


Vi s pht trin nhanh chng ca h tng mng NGN ca VNPT, dch v Hi

ngh truyn hnh ang dn tr nn ph bin Vit Nam v l gii php hiu qu

gip cc t chc, doanh nghip tit kim thi gian, chi ph di chuyn m vn m

bo v tng cng hiu qu hot ng.

4. Cc gi dch v tch hp:

Trong th k 21 xu th hi t ca cng ngh thng tin v truyn thng ngy mt r

nt, phm vi v khi nim ng dng CNTT c m rng. Bt nhp vi xu th ,

VTN em n cho khch hng cc gi dch v tch hp, cho php khch hng c

th tri nghim nhiu dch v vin thng (dch v thoi, VPN, Internet, truyn

hnh hi ngh...) trn cng mt ng truyn vt l.

5.

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