**TNG QUAN CNG NGH MAN V MNG TRUY NHP NGN

Trnh by: Bi Vit Phng H ni, 08/2008TNG CNG TY BU CHNH VIN THNG VIT NAM Vietnam Posts and Telecommunications Corporation

Ni dungPhn I. Cng ngh mng MAN v hin trng trin khai ca VNPT

Phn II. Tng quan mng truy nhp NGN v hin trng trin khai ca VNPT

Phn I Cng ngh mng MAN v hin trng trin khai ca VNPT

Trong nhng nm gn y, vi s pht trin vt bc ca cc cng ngh truy nhp mi (xDSL, FTTx) v cc dch v mi (VoIP, IPTV, VoD), c bit l xu hng tin ln NGN ca c nh khai thc Vin thng: Yu cu v bng thng kt ni ti cc thit b truy nhp (IPDSLAM, MSAN) ngy cng cao.Yu cu c s h tng truyn ti phi p ng cc cng ngh mi ca IP sn sng cho cc dch v mi ngy cng tng: multicast, end-to-end QoS, bandwitdh-on-demandYu cu bng thng cung cp trc tip cho khch hng (FE, GE) Tt c cc yu cu trn dn n s pht trin bng n ca mng MAN trong cc thnh ph, c bit l mng Ethernet-based MAN truyn ti lu lng IP.A. Xu hng mng MAN_E (Metro Area Network Ethernet)

K t khi c pht trin u nhng nm 1980, Ethernet tr thnh giao thc mng thng tr cc mng LAN trn TG. (>90% cc mng LAN).Tc khng ngng c nng cao: 10Mbps -> 10Gbps, 40Gbps.C ly truyn dn ngy cng tng: 10km, 40km, 70kmc hu nh tt c cc nh cung cp thit b trn TG h tr.Ti sao li pht trin MAN_Ethernet

Hiu qu chi ph:Chi ph u t v vn hnh thp.n gin: c tiu chun ha v khng ngng c pht trin.c ng dng rng ri trong tt c cc t chc, doanh nghip v thit b gia nh. linh ng cao:Qun l bng thng v m rng bng thng kt ni rt d dng.H tr rt nhiu m hnh kt ni (topology) khc nhau.Ti u cho vic truyn ti thng tin dng gi, c bit l cc gi tin IP. Vi s pht trin v mt cng ngh (Gigabit Ethernet & Optical), cc u im ca mnh, Ethernet hin c la chn rng ri xy dng mng MAN nhm p ng nhu cu ngy cng cao.Ti sao li pht trin MAN_Ethernet (tip)

V tr ca MAN_Ethernet

MAN_E phi p ng cung cp 2 loi hnh dch v kt ni E-Line v E-LAN.

E-Line:Cung cp cc kt ni point-to-point VPN (tng t nh Leased-Line).Cung cp cc kt ni Internet.E-LANMulti-point VPN.Transparent LANCc phng thc kt ni cung cp bi MAN_Ethernet

nh ngha E-Line v E-LAN theo Metro-Ethernet Forum

Cc yu cu i vi mng MAN_Ethernet

Cung cp a dng dch v: MAN_E cung cp mt c s h tng thng nht sn sng cho cc loi hnh dch v a dng: HSI, VoIP, IPTV, Tripple-play, ELine, ELAN, TDM/ATM/FR, NGN v Mobile 3GH tr QoS: m bo End-to-End QoS cho cc kt ni, c cc c ch iu khin bng thng cho cc kt ni, phn loi dch v, iu khin nghn sn sng cao: c cc c ch t ng phc hi kt ni khi c s c xy ra (50ms), trnh s c ti mt vi im c th nh hng n dch v ca ton mng.Hiu nng cao: bng thng ln, tr thng tin nhAn ninh, an ton: c cc c ch xc thc, p dng cc chnh sch an ninh mng, phng chng cc hnh thc tn cng. linh ng cao, kh nng m rng d dng.S dng cc giao thc, phng thc c tiu chun ha.Kh nng qun l tp trung, thit lp cc thng s dch v d dng.Chi ph thp.Cc yu cu i vi mng MAN_Ethernet (tip)

Cng ngh Leased-line SDH/SONET/ATMB. Cc cng ngh s dng cho mng MAN

Cng ngh Leased-line SDH/SONET/ATM (tip theo)u im khi s dng cho mng MAN: c pht trin lu nm v chun ha. H thng c cc nh khai thc vin thng xy dng sn sng.Kh nng p ng QoS, SLA.Kh nng phc hi cc kt ni khi mng c s c (

u im:L bc chuyn tip gia SDH truyn thng v mng IP, nn h tr ng thi cc dch v kt ni a dng.Tn dng c mt s u im ca SDH v IP: QoS, Management, s dng bng thng hiu qu hn SDH truyn thng.Nhc im: Phc tp, s dng bng thng cha ti uChi ph caoCng ngh NG-SDH

L s pht trin ca cng ngh SDH truyn thng nhm ti u cho vic truyn ti lu lng IP, p ng cc yu cu mi ca cc dch v mi (NGN) t ra:B sung cc k thut VCAT, GFP, LCAS m rng kh nng ca SDH.Chc nng chuyn mch Lp 2/ Lp 3.Dch chuyn t truyn TDM sang truyn Data:Qun l TDM v Data trn cng mt lung quang.iu khin bng thng gi lin tc, hiu qu hn.Duy tr cc chc nng ct li ca mng TDM. tch hp ca cc thit b cao: nh gn, cng sut tiu th thp, dung lng TDM ln.Cng ngh NG-SDH (tip)

Cc thnh phn ca NG-SDH:

VCAT: Ghp o (Virtual Concatenation)GFP: Th tc khung chung (Generic Framing Procedure)LCAS: C ch iu chnh dung lng tuyn (Link Capacity Adjustment Scheme)L2 Switching: Chuyn mch lp 2

Th tc khung chung GFP: nh ngha trong G.7041L phng thc ng gi chun truyn ti cc lu lng gi (khng ng b, kch thc gi bin ng) qua mng SDH/SONETBin i dng Data kiu gi thnh dng Data kiu byte: nh x cc dch v khc nhau vo mt khung dng chung Ghp vo cc khung SDHKhung GFP gm 4 trng:Mo u khung: Xc nh di khung GFP, pht hin li CRC.Mo u ti tin: Xc nh loi thng tin c truyn (cc khung qun l, khung khch hng).Thng tin ti khch hng: Ti thc truyn.Ty chn: Pht hin li FCS.Th tc khung chung GFP

2 dng GFP: C khung (GFP-F) v khng khung (GFP-T).

GFP-F: Ton b mt khung (gi) d liu data c nh x vo mt khung GFP (Dch v c nh x theo khung). di khung GFP thay i.GFP-T: Cc khi m ca tn hiu d liu c nh k nh x vo cc khung GFP (Dch v c nh x theo byte) di khung c nh Gim thiu tr Truyn d liu hiu quKiu s dng ty thuc vo dch v: GFP-F: Thch hp vi truyn tn hiu EthernetGFP-T: C th nh x bt k tn hiu d liu no

C 2 phng php ghp knh thng dng truyn ti cc lu lng gi data qua mng SDH: Ghp lin tc v Ghp oGhp lin tc (ITU-T G.707) :Cc gi tin ln cn c ghp lin tc vi nhau (Continuous concatenation), truyn qua mng NG SDH nh mt container.Cc nt mng tham gia vo ng truyn phi c kh nng nhn dng v x l c container ghp.Truyn ti mt s loi Data khng hiu qu v thiu cc mc thay i bng thng.Ghp o (ITU-T G.707):nh x tng gi tin vo mt lin kt ghp o (Virtual concatenation VCAT) gm nhiu container c s to thnh.Ghp mt s lng container bt k To ra nhiu mc bng thng linh ng hn so vi ghp lin tc. iu chnh hiu qu hn dung lng truyn ti theo yu cu dch v. Ghp o VCAT

Nt mng khi to v kt cuiNhn dng v x l cu trc ghp o.Cc container c s c th i theo cc ng khc nhau c s lch pha gia cc container khi i ti kt cui nt kt cui phi c cc b m tr, v cc c ch ti to li VCAT nh ti im u.Cc nt trung gian x l cc container nh cc container chun.VD: truyn knh data 1GbpsNu dng ghp knh lin tc (truyn thng): phi s dng 1 knh STM-16 2.5G vi container VC-4-16c hiu sut s dng bng thng: 42%S dng VCAT (VCG): VC-4-7v:VC-4 l mc c bn (150Mbps)S phn t c bn ca nhm l 7 7 * 150M = 1050M hiu sut s dng bng thng l 95%

Ghp o VCAT (tip theo)Hiu sut s dng bng thng ca mt s VCAT thng dng:

C ch iu chnh dung lng tuyn_LCAS:c nh ngha trong chun G.7402LCAS c th t ng iu chnh v xc nh bng thng tng thch cho VCAT. Hot ng gia 2 NE Ni giao tip khch hng vi mng SDH truyn thng.Cho php thit b u pht thay i linh hot s container ca nhm ghp ph hp vi thay i yu cu bng thng, theo thi gian thc. Byte H4/K4: Truyn ti gi iu khin, l thng tin v VC v cc thng s ca giao thc LCAS (Link Capacity Adjusment Scheme).

Chuyn mch lp 2

Chuyn mch Ethernet gia 2 Node bt k.H tr y cc tnh nng ca 1 Ethernet Switch lp 2.S dng giao thc Spanning Tree (STP).Cung cp cc dch v VLAN, VPN im-im

Cng ngh NG-SDH (tip theo)S kt ni ca 2 node NG-SDH

NG-SDH c th truyn ti ng thi c lu lng thng tin dng gi (packet) v cc dch v TDM truyn thng. NG-SDH l mt bc pht trin tip theo ca circuit-oriented SDH -> multi-service packet-friendly NG-SDH

Cng ngh IP/MPLS:

u im:p ng y cc yu cu v m bo QoS, Security, Restoration time (50ms)H thng qun l tng i hon thin.H thng tiu chun kh hon thin, v vn ang pht trin mnh mNhc im: chi ph cao, tng i phc tp.

B. Cc cng ngh s dng cho mng MAN (tip theo)

S tm tt cc cng ngh c th c s dng cho MAN_E:

Hin trng trin khai MAN_E ca VNPT

Xy dng mng MAN-E v mng cp quang sn sng cung cp cc dch v bng rng, v cc dch v NGN.MAN-E lm chc nng thu gom lu lng ca cc thit b truy nhp v cc khch hng trc tip, kt ni ln mng trc IP/MPLS chuyn lu lng i lin tnh v i quc t.Dung lng MAN-E phi p ng nhu cu d bo pht trin trong giai on ti.Xy dng ng thi h thng mng cp quang kt ni cc thit b MAN-E, thit b truy nhp, ti cc khu CN, buildings v cc khc hng ln.nh hng chung

Cloud

Application Server

HSS

IMS + Softswitch

P

PE

PE

PE

IP/MPLS backbone

P

Wimax

CES

CES

CES: Carrier Ethernet Switch

MAN Ethernet in provinces

MSAN

PSTN/PLMN

PSTN/PLMN

SIP

SIP

H248/SIP

DSLAM

EthernetSwitch

MGCP/H.248

MGCP/H.248

Cung cp a dng dch v: MAN_E cung cp mt c s h tng thng nht sn sng cho cc loi hnh dch v a dng: HSI, VoIP, IPTV, Tripple-play, ELine, ELANH tr QoS: m bo End-to-End QoS cho cc kt ni, c cc c ch iu khin bng thng cho cc kt ni, phn loi dch v, iu khin nghn sn sng cao: c cc c ch t ng phc hi kt ni khi c s c xy ra (50ms), trnh s c ti mt vi im c th nh hng n dch v ca ton mng.Hiu nng cao: bng thng ln, tr thng tin nhAn ninh, an ton: c cc c ch xc thc, p dng cc chnh sch an ninh mng, phng chng cc hnh thc tn cng. linh ng cao, kh nng m rng d dng.S dng cc giao thc, phng thc c tiu chun ha.Kh nng qun l tp trung, thit lp cc thng s dch v d dng.Ti u ha chi ph.Cc yu cu chung i vi mng MAN_Ethernet

Mt s yu cu v QoS cho cc dch v chy trn MAN_Ethernet:Cc yu cu v QoS ca dch v - nh ngha bi 3GPP

Mt s yu cu v cc dch v chy trn MAN_Ethernet:Cc yu cu v QoS ca dch v - nh ngha trong TR058 ca MEF

Kin trc mng MAN_Ethernet mc tiu:

Cc nguyn tc cu trc mng MAN-Ethernet:S dng cc thit b Carrier Ethernet Switch (CES) to thnh mng MAN truyn ti IP/Ethernet.Kin trc mng: u vng (Ring), sao (Star) hoc ni tip trong cc trng hp bt buc.S dng cc cng kt ni nx1GE hoc nx10GE qua cp quang.T chc mng MAN-E ca mi Tnh/Thnh ph thnh 2 lp:Lp trc (Core):Bao gm cc CES c ln lp t ti cc trung tm ln nht ca tnh (2-3 im). V tr lp t ti CES core ti cc im thu gom truyn dn v dung lng trung chuyn cao. T chc theo kin trc Ring, n x 1G, hoc nx10G.

Cc nguyn tc cu trc mng MAN-Ethernet (tip theo):Lp truy nhp (Access):Bao gm cc CES lp t ti cc trm Vin thng, kt ni vi nhau v kt ni ti ring core bng cp quang trc tip. Ty theo iu kin, lp truy nhp c th s dng kt ni dng hnh sao, ring (trong mt ring ti a t 4 - 6 thit b CES), hoc u ni tip nhau (ti a u ni tip t 4 - 6 thit b CES) m bo an ton cc vng Ring Access s c kt ni ti 2 thit b Core CES khc nhauV tr lp t cc CES truy nhp thng t ti cc im thun tin cho vic thu gom truyn dn kt ni n cc thit b truy nhp (nh MSAN/IP-DSLAM,)

Cc nguyn tc cu trc mng MAN-Ethernet (tip theo):Kt ni ti mng Core IP/MPLS: m bo mng hot ng n nh cao, kt ni t mng MAN E ti mng trc IP/MPLS NGN s thng qua 2 thit b core CES ca mng MAN E ( d phng v phn ti lu lng), kt ni nh sau:Ti tnh, thnh ph chc nng BRAS v PE tch hp trn cng mt thit b th mi thit b core CES s kt ni ti BRAS/PE.Ti tnh, thnh ph chc nng BRAS v PE c tch ring th cc thit b core CES s c 2 kt ni s dng giao din Ethernet, trong mt kt ni ti BRAS ( cung cp dch v truy nhp Internet tc cao), mt kt ni ti PE ( cung cp cc dch v khc, nh: thoi, multi media (VoD, IP/TV, IP conferencing)).Cc thit b MSAN/IPDSLAM cng nh cc khch hng ln s dng thu bao FE/GE s ch c u v cc Access CES (khng u vo Core CES) m bo an ton cho mng.

Thc hin tnh ton nh c mng MAN-Ethernet:Cc thng s u vo:S liu d bo thu bao ADSL 2/2+, SHDSL, Ethernet (FE/GE).Cc thng s v bng thng cung cp cho mi loi dch v (Voice, IPTV, VPN, Internet), loi thu bao (residential, business), s lng thu bao s dng ng thiXc nh v tr cc im t cc thit b truy nhp, cc CES.Phn b d bo thu bao ti cc im.Tnh bng thng ca cc vng Ring Access, Ring Core.Xc nh cu hnh c th cho tng CES: nng lc x l, cu hnh thit bTnh bng thng kt ni ln mng ng trc (BRAS, PE)

S liu d bo thu bao tnh ton MAN_Ethernet giai on 07-08Da trn s liu d kin nh trn cc n v phn b thu bao vo cc im node truy nhp ti trung tm, tnh, tp, huyn, th, cc ni c nhu cu dch v cao p ng cho nhu cu pht trin thu bao G 2007 - 2008

TTTn Tnh, TpADSL2+SHDSLTTTn Tnh, TpADSL2+SHDSL1Qung Nam47,00023514ng thp41,5562082Qung ngi22,37411215Tin Giang30,2661513Bnh nh23,55811816Bn tre45,8822294Ph Yn11,9406017Tr Vinh29,8821495Gia Lai33,35616718Vnh Long19,840996Kon tum13,2866619An Giang39,6841987k Lk31,27215620Kin Giang48,1642418Ninh Thun13,1566621C Mau17,798899Bnh Thun39,85219922Sc trng16,7928410Lm ng45,91423023Bc liu16,0428011Bnh Phc27,56213824Qung Bnh15,2647612Ty Ninh37,22818625Qung tr17,6408813Long an101,864509

Cc thng s u vo (gi nh) tnh ton MAN-E

Cu hnh mng MAN-Equ

V d mt cu hinh MAN-E sau khi hon thin

7x1G

1G

7x1G

1G

Mt s vn cn quan tm:La chn cng ngh mng.M hnh t chc tng tc gia cc MAN-E, v gia MAN-E vi IP/MPLS CoreTheo di s pht trin ca cc cng ngh mi, cc phng thc mi: Q-in-Q, MAC-in-MAC, multicast over MPLSTi u ha m hnh cung cp dch v, nh tuyn lu lng dch v: BRAS, DHCPLu ti cc loi hnh truy nhp mi v cc yu cu i vi MAN-E khi kt ni vi cc thit b cung cp dch v truy nhp trong tng lai: WiMAX, Mobile, FTTx

Phn IITng quan mng truy nhp NGN v hin trng trin khai ca VNPT

Xu hng ca cc dch v Vin thng:Lu lng thoi truyn thng suy gim.Chuyn dch sang cc dch v di ng v VoIP.S pht trin nhanh chng ca cc phng thc truy nhp bng rng cng gia tc thm s suy gim ca cc dch v truyn thng.

Xu hng ca cc dch v Vin thng (tip theo):Cc dch v bng rng chim ti nguyn mng hn rt nhiu so vi cc dch v truyn thng.Tuy nhin, trong tng lai gn 80% li nhun ca cc nh khai thc vin thng vn n t cc dch v truyn thng: TDM voice, Leased-line Thch thc cho cc nh khai thc v cung cp dch v vin thng

Xu hng ca cc dch v Vin thng (tip theo):

Duy tr s trung thnh ca cc khch hng hin c.Tng t l ARPU bng cch gii thiu cc gi dch v, cc loi hnh dch v mi, a dng ti cc i tng khch hng khc nhau.Gim chi ph u t (CAPEX) v chi ph vn hnh (OPEX) nhiu hn so vi cc i th cnh tranh.Xy dng mt c s h tng mng thng nht, vng chc v p ng sn sng cc yu cu ca cc dch v pht trin trong tng lai Xu hng tin ln NGN l xu hng tt yu ca cc nh cung cp dch v vin thng.Cc thch thc vi cc nh cung cp dch v vin thng

Hp nht cc mng truy nhp trn mt h tng thng nht:D dng trin khai cc dch v truyn thng cng nh cc dch v miGim ng k CAPEX v OPEXCc dch v bng rng (Broadband) l tng lai ca mng c nh.Cc dch v truy nhp khng dy bng rng s pht trin nhanh chng.Cc dch v truyn thng vn em li cc ngun doanh thu, li nhun chnh cho cc nh cung cp dch v trong tng lai gn.Cc vn cn quan tm:La chn cc loi cng ngh truy nhp khc nhau, cc loi giao din khc nhau.Chi ph u t cho mng truy nhp chim hn 60% tng chi ph xy dng mng.Chi ph vn hnh mng truy nhp chim 80% tng chi ph vn hnh.Xu hng chuyn i ca mng truy nhp

Cc phng thc truy nhp NGN:

2.1 Mng truy nhp broadband c nhDch v truy nhp xDSL ang chim lnh th trng truy nhp bng rng. Bng thng cung cp ca dch v xDSL cng cao th c ly cng ngn.Cp quang hin ang l mt xu hng pht trin cung cp cc kt ni tc cao, c ly truyn dn xa v n nh cao ti khch hng.Cc nh cung cp dch v cn cn nhc ti bng thng cung cp, khong cch ti khch hng, v chi ph u t la chn cng ngh truy nhp.

Phng thc truy nhp xDSLADSL2+ hin c hon thin v bt u c trin khai thng mi rng ri. Trong khi , VDSL2 vn ang trong giai on nghin cu, hon thini vi c li truyn dn 1.2km th tc truy nhp ca ADSL2+ v VDSL2 l nh nhauADSL 2+ hon ton tng thch vi ADSL tuy nhin tc cao hn, v t tn ngun cung cp hn (Seamless Rate Adaption - SRA)Cung c li: ADSL2+ tc cao hn.Cng tc : ADSL2+ c c li cung cp xa hn

Phng thc truy nhp FTTx (FTTC, FTTB, FTTH):Point-to-Point: Cung cp cc kt ni Leased-line cho cc khc hng lnPassive Optical Network-PON: Cng ngh mng quang th ng, di thng c chia u cho cc thu bao trn mt si quang bng thit b Splitter

2.2 Phng thc nhp khng dy WiMAXL cng ngh truy nhp broadband khng dy ha hn nht hin nay.p ng y yu cu cho cc dch v IP/NGN: data, VoIPKh nng di dng, thu pht c li xa, NLOS, thit b u cui gn nh

2.2 Phng thc nhp khng dy WiMAX (tip theo):IEEE 802.16(12/2001)802.16c(01/2002)OFDM802.16a(01/2003)802.16d(Q3 2004)802.16e(Q4 2005)WIMAX 802.16: s dng cho truyn dn khng dy c nh s dng di tn s 1066Ghz. LOS v ch dng cho cc kt ni Point-to-Point.

802.16c: pht trin s dng cho h thng mng MAN khng dy c nh: LOS, Point- to-Point backhaul, 1066GHz.

802.16a: pht trin cho di tn 2-11GHz, NLOS, cc ng dng Point-to-Mutilpoint.

2.2 Phng thc nhp khng dy WiMAX (tip theo):IEEE 802.16(12/2001)802.16c(01/2002)OFDM802.16a(01/2003)802.16d(Q3 2004)802.16e(Q4 2005)WIMAX 802.16d (802.16-2004): thay th cho phin bn trc (802.16a), s dng di tn 2-6GHz, NLOS, ng dng cho h thng truy nhp khng dy Point-to-Multipoint c nh (Fixed & Portable).

802.16e: s dng di tn 2-6GHz, NLOS, pht trin thm cc kh nng Roaming, truy nhp khi ang di chuyn vi tc cao. ng dng cho cc dch v truy nhp khng dy di ng.

2.2 Phng thc nhp khng dy WiMAX (tip theo):

Tnh hnh s dng tn s cho WiMAX trn Th gii:

xDSL:Tip tc l phng thc truy nhp ch o ca cc nh cung cp dch v trn TG (t nht l ti 2009). Chim 70% th trng truy nhp bng rng.ADSL2+ s thng tr cc phng thc truy nhp xDSL trong vng t 3 ti 5 nm naFTTx:L phng thc truy nhp tim nng i vi cc nc pht trin.Xa b cc gii hn ca xDSL v c li v tc truyn dn.D b0 s c trin khai rng ri sau 2009. Chim khon 10% th trng truy nhp bng rng, nhng s tr thnh phng thc ch o trong khong 10 15 nm na.WiMAX:ang trong qu trnh tiu chun ha.Bc u c trin khai ti nhng ni mng c nh kh trin khai.Dch v c nhn WiMAX mobile bt u c trin khai trn TG vo 2008.Tm tt tnh hnh cc phng thc truy nhp NGN

Trin khai mng truy nhp ca VNPT

Hin trngCc mng cung cp dch v ca VNPT hin vn ang kh tch bit.Phc tp, nhiu tng nhiu lp.Rt kh qun l tp trung v a ra cc dch v tch hp.

Hin trng mng truy nhp xDSL:Bt u trin khai t thng 9/2003L h thng da trn cng ngh ATM (ATM-based).Cc DSLAM kt ni v BRAS hoc v DSLAM-HUB bng nxE1 hoc STM1DSLAM-HUB kt ni BRAS bng STM1BRAS kt ni mng backbone bng cc kt ni n x STM1, n x STM4, GEADSL/ADSL2+ cung cp dch v Internet cho khch hng.SHDSL s dng cung cp VPN

Hin trng mng truy nhp xDSL (tip theo):H thng ATM-based hin nay s dng cng ngh SDH lm truyn dn uplink cho cc DSLAM gii hn v bng thng, c bit l khi cung cp cc dch v mi i hi bng thng cao.Khng h tr hoc h tr yu cc tnh nng broadcast/multicast phc v cho cc dch v tng lai: IPTV

Tnh hnh trin khaixDSL:Tip tc pht trin, m rng phm vi cung cp trn tt c cc Tnh/Thnh ph.Tng cng bng thng cung cp cho khch hng.Dn dn thay th cc thit b ATM-based sang IP-based sn sng cung cp cc dch v miCu trc mng truy nhp DSL dng thit b Ethernet TR101

Trin khai mng xDSL (tip theo):Trin khai cc thit b IP-DSLAM v MSAN cung cp dch v.

Trin khai mng xDSL (tip theo):Thit b truy nhp MSAN Multi Service Access Node:

Cung cp nhiu loi phng thc truy nhp ng thi: bng rng v bng hp.C cc kt ni TDM ti h thng c cung cp dch v bng hp.Cc kt ni IP : cung cp cc dch v bng rng v kt ni ti mng NGN.Sn sng nng cp ln VoIP (H.248, SIP), v cc tnh nng QoS, Multicast chuyn i ln NGN.

Trin khai mng xDSL (tip theo):Cu trc thit b truy nhp MSAN:Bao gm 2 b phn c bn: phn chuyn mch TDM v phn chuyn mch IPKin trc Bus ni b cng gm 2 phn tng ng: Bus TDM cho cc dch v bng hp (POTS, TDM Leased-line..) v Bus IP cho cc dch v bng rng (xDSL, VoIP)Giao din kt ni thoi POTS: V5.2 TDMGiao din kt ni thoi VoIP (H.248, SIP): l cc giao din IP (FE, GE)

Kt ni mng thit b truy nhp MSAN:Vng, sao, chui

MSAN ph hp trin khai trong giai on chuyn tip ln NGN: c s h tng IP cha hon thin, tng bc trin khai Softswitch.Trin khai nhng ni vn cn nhu cu pht trin dch v thoi POTS. Kt ni V5.2 v s dng c s h tng c sn (truyn dn TDM v giao din V5.2 trn tng i).Kt ni ti h thng xDSL bng TDM hoc IP cung cp dch v.Chuyn i ln NGN: Vn dng cc thu bao c cung cp dch v voice cho khch hng.Nng cp card Coder VoIP v Card iu khin bo hiu (H.248, SIP) lm vic vi Softswitch cung cp dch v VoIP.u ni phn uplink IP cung cp ng thi cc dch v BB v NB.

Hin nay, Tp on trin khai thit b MSAN cho mt s Tnh/TP p ng nhu cu pht trin thu bao.Trong thi gian ti, s tip tc trin khai MSAN cho cc Tnh/TP khc sn sng cho bc chuyn i ln NGN.

Phng n s dng thit b truy nhp MSAN

Trin khai mng xDSL (tip theo):Thit b truy nhp IPDSLAM:

Cu trc ca IPDSLAM tng i n gin: thng thng gm 1 Layer 2 Switch c tch hp trong Card iu khin lm nhim v chuyn mch cc gi tin v thc hin cc tnh nng lp 2: STP, Multicast, Q-in-QHin nay c mt s hng sn xut tch hp phn VoIP vo IPDSLAM cung cp dch v thoi NGN trong tng lai.

Phng n s dng thit b truy nhp IPDSLAM:IP DSLAM hin c s dng tng i ph bin trong mng truy nhp VNPT.IPDSLAM c s dng cung cp dch v truy nhp HSI.BTV/VODSTBMODEMIP PhonePCHome networkDSLAM

PPPOE IP CORETagging VLAN theo port hoc PVC; hoc da trn kiu dch v (Prototype)PPPoE Intermediate agent: thng tin v v tr c chn vo theo port hoc PVCHn ch s lng a ch MACAAA ServerBRASPPPOE termination &Radius clientDHCPServerKt cui VLAN v PPPoE, chuyn lu lng theo a ch ch ca giChp nhn PPPoE authentication, DHCP server xc lp a ch IP ng cho thu bao.

Phng n s dng thit b truy nhp IPDSLAM (tip theo):Hin nay cc IPDSLAM ang c trin khai cung cp HSI bng giao thc PPPoE v theo m hinh 1:1 VLAN

Vi bn cht c 1 Layer 2 Switch tch hp nn m hnh u ni ca IPDSLAM rt linh ng: Ring, Star, String Ngoi ra IPDSLAM cn sn sng tnh nng Multicast cung cp dch v IPTV.

Cc phng thc truy nhp khcGigabit Ethernet: cung cp bi mng MAN_E hin nay bt u c cung cp th nghim ti mt s thnh ph ln (HNI, TPHCM, HPG)FTTx: ang trong qu trnh cung cp th nghim.WiMAX: tin hnh th nghim, hin ang ch qu trnh tiu chun ha v thng mi ha sn phm ca cc nh cung cp thit b.IPTV: tin hnh th nghim trn mng xDSL. ang xy dng phng n cung cp dch v.

Xin cm n !