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Chng I: Xu hng v tnh hnh trin khai dch v Ethernet

ti: 98-06-KHKT-RD http://www.ebook.edu.vn 1

B BU CHNH VIN THNG

HC VIN CNG NGH BU CHNH VIN THNG

--------o0o--------

TI

NGHIN CU CC TIU CHUN CA CC T CHC TIUCHUN TRN TH GII V DCH V ETHERNET V

KHUYN NGH P DNG VIT NAM

M s: 98-06-KHKT-RD

Ch tr ti: TS. V Tun LmCng tc vin:

ThS. Nguyn Vnh NamThS. V Hong SnThs. Trn Th Thu BnhKS.Phm Hng Nhung

H ni 12 2006


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Mc lc

Mu................................................................................................................................................................................................................................................................................... ivCh vit tt ............................................................................................................................................................................................................................................................................viCHNG 1. ..TNG QUAN V XU HNG V TNH HNH TRIN KHAI DCH VETHERNET TRN TH GII ............................................................................................. 11. TNG QUAN V CNG NGH MNG V DCH V ETHERNET .....................1

1.1 Tng quan mng quang Ethernet ................................................................. 11.1.1 Cc c tnh ca E-MAN ..................................................................... 21.1.2 Cu trc mng E-MAN ........................................................................ 21.1.3. Xu hng pht trin cng ngh mng ................................................. 3

1.2 Cc dch v cung cp qua mng Ethernet Metro......................................... 8

1.2.1. Gii thiu ............................................................................................. 81.2.2. Li ch dng dch v ethernet.............................................................. 8

1.3 M hnh dch v Ethernet .......................................................................... 101.4 Cc loi dch v Ethernet........................................................................... 11

1.4.1 Dch v knh Ethernet: ....................................................................... 121.4.2 Dch v LAN Ethernet: ...................................................................... 13

2. XU HNG V TNH HNH TRIN KHAI DCH V ETHERNET ....................152.1. Xu hng pht trin dch v Ethernet....................................................... 152.2. Tnh hnh trin khai dch v Ethernet ....................................................... 20

2.2.1 Tng hp s liu kho st cung cp dch v ethernet: ....................... 22

2.2.2 USA .................................................................................................... 242.2.3 Trung Quc......................................................................................... 312.2.4 Thi lan ............................................................................................... 342.2.5 Japan ................................................................................................... 352.2.6 Korea .................................................................................................. 362.2.7 France ................................................................................................. 38

3. KT LUN CHNG 1............................................................................................ 39

CHNG 2. ........... CC GII PHP CNG NGH V THIT B V MNG QUANGETHERNET CA CC HNG CUNG CP THIT B TRN TH GII ....................41

1. XU HNG PHT TRIN TH TRNG CNG NGH, THIT B MNGQUANG ETHERNET ..................................................................................................... 411.1. Phn loi thit b ...................................................................................... 411.2. Th trng thit b mng ng trc......................................................... 421.3. Xu hng pht trin th trng sn phm mng MAN Ethernet .............. 44

1.3.1 Thit b SONET/SDH MSPP ............................................................. 461.3.2 Thit b Ethernet-MAN ...................................................................... 481.3.3 Thit b chuyn mch Ethernet 10Gbit/s ............................................ 501.3.4 Thit b cng ngh Ring gi RPR....................................................... 531.3.5 Thit b h thng WDM MAN ........................................................... 53

2. CC GII PHP CNG NGH, THIT B IN HNH V MNG QUANGETHERNET CA CC NH CUNG CP THIT B TRN TH GII. ...................55


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2.1 Gii php thit b mng v cng c qun l quang Ethernet ..................... 572.2 Gii php thit bo................................................................................... 69

3. TNH HNH TRIN KHAI MNG QUANG ETHERNET CA CC NH CUNGCP DCH V TRN TH GII .................................................................................. 70

3.1 Korea Telecoms ......................................................................................... 70

3.2 AT&T......................................................................................................... 713.3 Hng vin thng Unicom ca Trung quc................................................. 733.4 Mt s nh khai thc khc ......................................................................... 73

4. KT LUN CHNG 2............................................................................................ 74

CHNG 3. .SCHUN HO V DCH V ETHERNET CA CC T CHC TIUCHUN V CC DIN N CNG NGHIP TRN TH GII .................................761. TNH HNH CHUN HO CA IEEE..................................................................... 76

1.1 Gii thiu ................................................................................................... 761.2 Cc tiu chun IEEE .................................................................................. 77

1.2.1 Tng quan v cc h tiu chun ......................................................... 771.2.2 B Tiu chun ethernet IEEE 802.3 ................................................... 801.2.3 Tiu chun cng ngh RPR................................................................ 851.2.4 Kt lun: ............................................................................................. 86

2. TNH HNH CHUN HO CA METRO ETHERNET FORUM (MEF) ..............882.1 Gii thiu ................................................................................................... 882.2 Cc tiu chun k thut ca MEF.............................................................. 902.3. Tng quan v tiu chun dch v Ethernet ............................................... 962.4 Kt lun.................................................................................................... 105

3. TNH HNH CHUN HO CA ITU-T.................................................................106

3.1. Gii thiu chung v t chc ITU-T ........................................................ 1063.2. Quan im v dch v ethernet ca t chc ITU-T ................................ 1073.3. Cc tiu chun ca t chc ITU-T.......................................................... 109

3.3.1 Cc tiu chun v Ethernet ............................................................... 1103.3.2 So snh tiu chun dch v ca MEF G.8011/Y.1307 .................. 112

3.4 Kt lun.................................................................................................... 1154. TNH HNH CHUN HO CA IETF...................................................................117

4.1. Gii thiu chung...................................................................................... 1174.2 Quan im ca IETF v chun ho Ethernet over MPLS ....................... 119

4.2.1 Nhm dy gi bin n bin (PWE3)............................................... 119

4.2.2 Nhm VPN lp 2 .............................................................................. 1214.3 Kt lun.................................................................................................... 1255. KT LUN CHNG 3.......................................................................................... 126

CHNG 4. KHUYN NGH P DNG TIU CHUN ............................................. 1291. TNH HNH TRIN KHAI MNG MAN CUNG CP DCH V ETHERNET VIT

NAM 1291.2. Mng th bng rng a dch v TP H Ch Minh .............................. 1291.3. Mng MAN Bu in TP. H Ch Minh ................................................ 1361.4. D n xy dng mng MAN ti Bu in H Ni ................................. 1381.5 Mng MAN ca FPT .............................................................................. 142

2. XUT P DNG V BIN SON CC CHUN CA CC T CHC, DINN CHUN HO CHO VIT NAM........................................................................ 144


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2.1 p dng cc tiu chun ca cc t chc chun ho v din n Quc t vEthernet. ......................................................................................................... 1442.2 u tin chun ho v dch v, giao din kt ni v h thng.................. 145

3. KIN NGH VNH HNG PHT TRIN MNG MAN CUNG CP DCH VETHERNET .................................................................................................................. 147

3.1. Xc nh loi hnh cung cp dch v trong mng MAN hin ti v trongtng lai ......................................................................................................... 1493.2. Xc nh cc tha thun vc tnh ca cc loi hnh dch v v cp dchv.................................................................................................................... 1543.3. Xc nh kin trc mng......................................................................... 1563.4. La chn gii php cng ngh ................................................................ 1613.5. La chn nh cung cp thit b v gii php mng c th...................... 1633.6. Xy dng cc b tiu chun mng th v o to nng cao trnh choi ng cn b qun l k thut. .................................................................... 164

4. KT LUN ...............................................................................................................165

PH LC A - HIN TRNG CHUN HO THIT B V DCH V THEO MEF ...167PH LC B - GII PHP THIT B MNG QUANG ETHERNET............................ 174PH LC C - BNG TNH CC DCH V MetroNET............................................. 205Ti liu tham kho .............................................................................................................207


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Mu

Ethernet c bit l mt cng ngh ph bin nht trong mng LAN vi nhiu uim nhn gin, mm do, ph hp lu lng IP, v chi ph thp. Theo thng ktrn Th gii [ngun t nhm EFM ca IEEE], Ethernet l cng nghc trin khaitrn 90% trong mng LAN, v trn 95% lu lng Internet cng xut pht t Ethernet.Do vy, cng vi xu th gi ho mng vin thng theo hng mng th h sau (NGN),chun dch v v cng ngh Ethernet cng l mt ng c hp dn nht cho pht trinmng truy nhp v mng MAN, WAN.

Hin nay, mt trong nhng vn nng hi trn th trng mng MAN, l qu

trnh chun ho v pht trin sn phm cung cp dch v Ethernet, p ng nhu cutruy nhp tc cao vi chi ph thp v kh nng cnh tranh.

Cc t chc tiu chun (IEEE, ITU, IETF, MEF) c cch tip cn khc nhau,nhng cng phi hp vi nhau xy dng ln cc yu cu v: m hnh, loi hnh dchv, cc yu cu v giao din, giao thc v cht lng cc tham s dch v Ethernet.Hin nay, cc t chc ny cng a ra c mt s tiu chun p ng nhu cutrc mt ca th trng.

Mt s hng (Telium, Lucent, Cisco, NEC, Nortel) cng a ra cc sn

phm v gii php cung cp cc dch v Ethernet. Cc sn phm ca cc hng theo cctiu chun khc nhau m h h tr. Cc hng thit b o kim (Agilent, Acterna,Phoenix Datacom ...) cng a ra cc gii php thit bo v nh gi dch vEthernet theo cc tiu chun ca cc t chc khc nhau. Cc nh khai thc ln trn Thgii cng bc u cung cp dch v v giao din kt ni Ethernet. (AT&T,MCI/WORLD COM, SPRINT, CHINA Telecommunications Corp. trin khai ccloi dch v Ethernet)

ng trc s bng n v lu lng Internet, mng Vin thng ca Vit nam

hin nay ang trong giai on chuyn dch sang mng NGN. Trong ang ni lnvn giI quyt tc nghn dch v trong mng MAN quang.

V vy, vic tm hiu v nghin cu tnh hnh chun ho, th trng v gii phpmng ca cc hng s cho thy r c xu hng pht trin, cc yu cu v kh nngcung cp dch v Ethernet v lm cscho qu trnh la chn tiu chun, o kim vnh gi cng nh nghin cu, nh hng cho trin khai dch v v mng Ethernetca Vit nam.


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Thut ngvit tt

ADM Add-Drop Multiplexer B ghp knh xen-r

ANSI Americal National Standards Institute Vin chun ho Hoa K

APS Automatic Protection Switching Chuyn mch bo v tngASON Automatic Switched Optical Network Mng quang chuyn mch t

ng

ATM Asynchronous Transfer Mode Ch chuyn mch khng

ng bAU-n Administrative Unit-n Khi qun l

BER Bit Error Ratio T l li bitCCI Connection Control Interface Knh iu khin kt ni

CCU Central Control Unit Khi qun l trung tm

CE Customer Edge Pha khch hng

CoS Class of Service Lp dch v

CPE Customer Premises Equipment Thit b pha khch hng

CPL Current Problem List function Chc nng lit k cc vn

hin ti

CRC Cyclic Redundancy Check M sa li vngCRC-10 Cyclic Redundancy Check 10 Kim tra d chu trnh-10CRLDP Contraint-Based Routing -Label

Distribution ProtocolGiao thc phn phi nhn nh tuyn cng bc

CSF Client Signal Fail Li tn hiu khch hngCTRL Control field sent from source to sink Trng iu khin pht t

ngun n chCWDM/DWDM Coarse/ Dense Wavelength Division

MultiplexGhp knh theo bc sngghp lng/ghp mt cao

DAPI Destination Access Point Identifier Giao din im truy nhp chDCC Digital Communication Channel Knh thng tin s

DCS Digital Cross-Connect System H thng ni cho s

DEG Degraded performance Pht hin suy gim hiu nng

DLE Dynamic Lightpath Establishment Thit lp tuyn quang ngDNU Do Not Use Khng s dng

DSL Digital subscriber line ng thu bao sDXC Digital Cross-Connect Bu cho s

E-LAN Ethernet LAN Service Dch v LAN ethernetE-NNI Exterior NNI Giao din NNI bn ngoi


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EOF End Of Frame Cui khungEoS Ethernet over SDH Ethernet trn SDHEOS End Of Sequence Cui dyESCON Enterprise Systems Connection Kt ni cc h thng doanh

nghip

ETSI European Telecommunications

Standards Institute

Vin cc tiu chun vin

thng Chu uFC Fibre Channel Knh si quangFCS Frame Check Sequence Chui kim tra khungFICON Fibre Connection Kt ni si quangFSC Fiber Switching Capability Kh nng chuyn mch si

quang

GE Gigabit Ethenet Gigabit EthenetGFP-F/T Framing mapped/Transparent Generic

Framing ProcedureTh tc lp khung tng quttheo khung/trong sut

GID Group Identification Xc nh nhmGMPLS Generalized Multiprotocol Label

SwitchingChuyn mch nhn a giaothc tng qut

HDLC High-level Data Link Control iu khin tuyn d liu bccao

HEC Header Error Check Kim tra li mo uHO Hold Off Hold OffHOVC Higher Order Virtual Container Conteno bc cao

IEEE Institute of Electrical and ElectronicEngineers

IETF Internet Engineering Task Force T chc c nhim k thutInternet

IFG Inter-Frame Gap Khong cch gia cc khungI-NNI Interior NNI Giao din NNI bn trongIP Internet Protocol Giao thc internetIPG Inter-Packet Gap Khong cch gia cc giISISTE Intermediate SystemtoIntermediate

SystemTraffic EngineeringK thut lu lng cho ktni h thng trung gian n h

thng trung gianISP Internet Service Provider Nh cung cp dch v internet

ITU-T International Telecommunications

Union (Telecommunications

Standardisation Sector)

Hip hi vin thng quc t

LAN Local area network Mng ni bLAPS LAN Adapter Protocol Support Program Chng trnh h trgiao thc

thch ng LAN

LC Link Connection Kt ni link

LCAS Link Capacity Adjustment Scheme K thut hiu chnh dung


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lng tuynLCAT Link Capacity Adjustment Scheme Cchiu chnh dung lng

tuynLCP Link Control Protocol Giao thc iu khin tuyn

LMP Link-Management Protocol Giao thc qun l tuynLOS Loss Of Signal Mt tn hiuLOVC Low Order Virtual Container Conteno bc thpLSB Least Significant Bit Bit t ngha nhtLSC Lambda Switching Capability Kh nng chuyn mch bc

sngLSP Label-Switched Path ng chuyn mch nhnLSR Label-Switched Router B nh tuyn chuyn mch

nhn

LTP Line Terminal Point im kt cui ng dy

MAC Medium Access Control iu khin truy nhp mitrng

MAN Metro Area Network Mng vng thMAPOS Multiple Access Protocol Over SONET Giao thc a truy nhp trn

SONET

MFAS MultiFrame Alignment Signal Tn hiu ng chnh a khungMFI Multiframe Indicator Ch tha khungMI Management Information Thng tin qun l

MIB Management Information Base (Cu trc cy) da trn thng

tin qun lMPS MultiProtocol Lambda Switching Chuyn mch bc sng a

giao thc

MPLS MultiProtocol Label Switching Chuyn mch nhn a giao

thc

MPLS/GMPLS Multi Protocol label

switching/generization multi protocol

label switching

Chuyn mch nhn a giao

thc/tng qut ho

MS Multiplex Section on ghp knhMSB Most Significant Bit Bit c ngha nhtMSP Multiplex Section Protection Bo von ghp knhMSPP Multi-Service Provisioning Platform Thit b cung cp a dch vMST Member Status Trng thi thnh vin

MSTE Multiplex Section Terminating Element Thit b kt cui phn ghp

knhMSU Member Signal Unavailable Khng kh dng tn hiu

thnh vin

MSU_L Member Signal Unavailable, LCAS-enabled criteria Khng kh dng tn hiuthnh vin, tiu ch gip cho


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LCAS

NC&M Network Control and Management Qun l v Iu khin mng

NE Network Element Phn t mng

NEA Network Element Alarms function Chc nng cnh bo phn t

mng

NEL Network Element Layer Tng thnh phn mng

NEML Network Element Management Layer Tng qun l thnh phn

mng

NG

SONET/SDH

Next Generation SONET/SDH SONET/SDH th h sau

NGN Next Generation network Mng th h sau

NMI Network Management Interface Giao din qun l mngNMI Network Management Interface Giao din qun l mng

NML Network Management Layer Tng qun l mng

NMS Network Management System H thng qun l mngNNI Network to Network Interface Giao din kt ni Mng

MngNORM Normal Operating Mode Mode khai thc bnh thng

NVS Network Visualisation Service (Tng) dch v mng o

OA&M Operation, Administration and

Maintenance

Vn hnh, qun l v bo

dngOADM Optical Add Drop Multiplexer B ghp knh xen r quangOAM Operation, Administration and

MaintenanceKhai thc, gim st v bodng

OIF Optical Internetworking Forum Din n mng lin kt quangOLA Optical Line Amplifier B khuch i ng truyn

quang

OLT Optical Line Terminal Kt cui ng dy quang

OMS Optical Multiplex Section Tng ghp knh quang

ONE Optical Netwwork Element Phn t mng quangOS Operation System H thng khai thc

OSNR Optical Signal to Noise Ratio T s tn hiu trn tp m

quangOSPF Open Shortest Path First Thut ton chn ng ngn

nhtOSPFTE Open Shortest Path FirstTraffic

EngineeringK thut lu lng p dngcho thut ton chn ngngn nht

OTN Optical Transport Network Mng truyn dn quangOTS Optical Transport Section Tng truyn ti quang


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OVPN Optical Virtual Private Network Mng ring o quang

OXC Optical Cross-connect Thit b kt ni cho quang

PDH Plesiochronous Digital Hierarchy Phn cp s cn ng bPDU Protocol Data Unit Khi d liu giao thc

PLI PDU Length Indicator Trng di ti tinPOH Path Overhead Mo u lungPOL Packet Over Lightwave Gi trn quangPOS POS Packet Over Sonet/SDH Truyn gi d liu qua

Sonet/SDH

PPP Point to Point Protocol Giao thc im-ti-imPSC Packet Switched Capability Kh nng chuyn mch gi

PSTN Public Switched Telephone Network Mng in thoi cng cng

PTE Path Terminal Equipment Thit b kt cui tuyn

QoS Quality of Service Cht lng dch vRPR Resilient Packet Ring Ring gi tin cy

RS Regenerator Section on lpRS-Ack Re-Sequence Acknowledge Bo truyn li dy

RSVP Resource Reservation Protocol Giao thc ng k trc ti

nguynRSVPTE Resource Reservation ProtocolTraffic

EngineeringK thut lu lng p dngcho giao thc ci t tinguyn

SAN Storage area network Mng lu tr

SAPI Source Access Point Identifier Nhn din im truy nhp

ngunSDH Synchronous Digital Hierarchy H thng phn cp sng bSDH-NG Next Generation SDH SDH th h k tipSDLC Synchronous Data Link Control iu khin tuyn d liu ng

b

SF Soft Failures S c mmSk Sink im chSLA Service Level Agreement Tho thun mc dch v

SML Service Management Layer Tng qun l dch v

SN Sub-network Mng con

SNC Sub-network Connection Kt ni mng con

SNCP Sub-network Connection Protection Bo v kt ni mng con

SNML Sub-network Management Layer Tng qun l mng conSo Source im ngunSONET Synchronous Optical Network Mng quang ng b

SPC Soft Permanent Connection Kt ni cnh mmSQ Sequence Indicator Ch th dy


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STM-n Synchronous Transport Module level N M-dun truyn ti ng b

mc n

TCP Transmission Control Protocol Giao thc iu khin truyn

ti

TDM Time division multiplexing Ghp knh theo thi gian

TEP TMN Event Pre-processing function Chc nng tin x l s kin

TMN

TMN Telecommunications Management

Network

Mng qun l vin thng

TSD Trail Signal Degrade Suy gim tn hiu ngtruyn

TU-n Tributary Unit-n Khi ghp nhnh-n

UCP Universal Control Plane Mt iu khin chungUNI User-to-Network Interface Giao din kt ni ngi sdng mng

VC Virtual Container (in SDH) ContenoVCAT Virtual Concatenation Ghp chui oVCC Virtual Channel Connection Knh kt ni oVCG Virtual Concatenation Group Nhm ghp oVC-n Virtual Conten-n Conteno-nVC-n-Xc X contiguously Concatenated VC-ns X khung VC-n ghp lin tcVC-n-Xv X Virtually Concatenated VC-ns X khung VC-n ghp o

VLAN Virtual LAN LAN oVPN Virtual Private Network Mng ring o

WAN Wide area network Mng din rngWDM Wavelength Division Multiplex Ghp knh theo bc sng

quang

WIS Wide area interface system H thng giao din din rngWTR Wait-to-Respond Chphn hiXA Actual number of members of a virtual

concatenation groupS thnh vin thc t ca mtnhm ghp o

XM Maximum size of a virtualconcatenation group Kch thc ln nht ca mtnhm ghp oXP Number of provisioned members in a

virtual concatenation groupS thnh vin c cp trongmt nhm ghp o


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Muc lucCHNG 1. ..TNG QUAN V XU HNG V TNH HNH TRIN KHAI DCH VETHERNET TRN TH GII ............................................................................................. 11. TNG QUAN V CNG NGH MNG V DCH V ETHERNET ..................... 1

1.1 Tng quan mng quang Ethernet ................................................................. 1

1.1.1 Cc c tnh ca E-MAN ..................................................................... 21.1.2 Cu trc mng E-MAN ........................................................................ 21.1.3. Xu hng pht trin cng ngh mng ................................................. 3

a. SONET/SDH-NG.................................................................................. 4b. Ethernet/Gigabit Ethernet...................................................................... 4c. RPR........................................................................................................ 5d. WDM..................................................................................................... 6e. MPLS/GMPLS ...................................................................................... 6

1.2 Cc dch v cung cp qua mng Ethernet Metro......................................... 81.2.1. Gii thiu ............................................................................................. 8

1.2.2. Li ch dng dch v ethernet.............................................................. 81.3 M hnh dch v Ethernet .......................................................................... 101.4 Cc loi dch v Ethernet........................................................................... 11

1.4.1 Dch v knh Ethernet: ....................................................................... 121.4.2 Dch v LAN Ethernet: ...................................................................... 13

2. XU HNG V TNH HNH TRIN KHAI DCH V ETHERNET ....................152.1. Xu hng pht trin dch v Ethernet....................................................... 152.2. Tnh hnh trin khai dch v Ethernet ....................................................... 20

2.2.1 Tng hp s liu kho st cung cp dch v ethernet: ....................... 222.2.2 USA .................................................................................................... 24

AT&T:..................................................................................................... 24BELLSOUTH.......................................................................................... 26MetNet Communications Inc. ................................................................. 26Qwest Communications International Inc............................................... 27Verizon Communications Inc. ................................................................ 27

2.2.3 Trung Quc......................................................................................... 282.2.4 Thi lan ............................................................................................... 302.2.5 Japan ................................................................................................... 312.2.6 Korea .................................................................................................. 312.2.7 France ................................................................................................. 33

3. KT LUN CHNG 1............................................................................................ 34


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TNG QUAN V XU HNG V TNH HNH TRIN KHAI DCH VETHERNET TRN TH GII

Trong chng ny sa ra tng quan v xu hng pht trin v tnh hnh trin khai

dch v Ethernet. Hin nay c nhiu cng ngh mng c th cung cp dch v Ethernet,

trc ht trong chng ny gii thiu tng quan cc cng ngh mng cung cp dchv

ethernet. Tip theo gii thiu khi nim dch v Ethernet v xu hng pht trin dch v

Ethernet trn th gii. thy uc s pht trin ca dch v Ethernet trong chng ny

a ra cc d bo cng nh tnh hnh trin khai trn th gii ca cc nuc trong khu vc

cng nh quc t

1. TNG QUAN V CNG NGH MNG V DCH V ETHERNET

1.1 Tng quan mng quang Ethernet

Trong vng ba thp k qua, Ethernet l cng ngh thng lnh trong cc mng ni b LAN,

l cng ngh cho trong hu ht cc vn phng trn ton th gii v hin nay c

dng ngay c trong cc h gia nh chia s cc ng dy truy nhp bng rng gia cc

thit b vi nhau. c bit tt c cc my tnh c nhn u c kt ni bng Ehernet v

ngy cng nhiu thit b truy nhp dng n cng ngh ny.

C nhiu l do gii thch ti sao Ethernet c s thnh cng nh vy trong c ccdoanh nghip ln cc h gia nh: d s dng, tc cao v gi thit b r.

Cng vi s pht trin ca cng ngh thng tin, tc Ethernet c ci thin t Mbps

ln Gbps v 10Gbps. Song song vi n, phng tin truyn trong mng Ethernet cng

chuyn dn t cp ng sang cp quang, v cu hnh cng pht trin t cu trc bus

dng chung ln cu trc mng chuyn mch. y l nhng nhn t quan trng xy dng

cc mng c dung lng cao, cht lng cao, v hiu xut cao, p ng c nhng i

hi ngy cng kht khe ca yu cu v cht lng dch v (Qos) trong mi trng mng

mng th (MAN) hay WAN. Tuy nhin, hin nay nhu cu pht trin dch v Ethernetch yu trong mi trng mng MAN.

Mrng t mng LAN ra mng MAN to ra cc chi mi cho cc nh khai thc mng.

Khi u t vo mng E-MAN, cc nh khai thc c kh nng cung cp cc gii php

truy nhp tc cao vi chi ph tng i thp cho cc im cung cp dch v POP (Points

Of Presence) ca h, do loi bc cc im nt c chai tn ti gia cc mng LAN

ti cc cquan vi mng ng trc tc cao.

Doanh thu gim do cung cp bng tn vi gi thp hn cho khch hng c th b li bng

cch cung cp thm cc dch v mi. Do vy E-MAN s to ra phng thc chuyn t


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cung cp cc ng truyn c gi cao n vic cung cp cc dch v gi tr gia tng qua

bng thng tng i thp.

1.1.1 Cc c tnh ca E-MAN

Khch hng c kt ni n E-MAN s dng cc giao din thch hp vi Ethernet thay vphi qua nhiu giai on bin i t lu lng ATM, SONET/SDH v ngc li. Bng

cch ny khng ch loi bc s phc tp m cn lm cho qu trnh cung cp n gin

i rt nhiu. M hnh Metro hnh thnh t qa trnh cung cp cc ng bng thng gia cc

node v khch hng u cui cung cp cc mng LAN o (VLAN) v cc mng ring

o (VPN) da trn mc tho thun dch v SLA.

Trong trng hp ny, cc vn c n gin ho i rt nhiu cho c khch hng ln

nh khai thc. Khch hng khng cn phi chia ct lu lng v nh tuyn chng n cc

ng ph hp n ng cc node ch na. Thay v to ra rt nhiu chm ngtruyn gia cc node, y ch cn to ra bng tn da theo SLA m bao hm c nhu

cu ca khch hng ti mi node.

Ni cch khc, cung cp cc kt ni khng cn l vn thit yu i vi nh cung cp

mng na do h c iu kin tp trung vo vic to ra cc dch v gi tr gia tng.

Bng vic m rng mng LAN vo mng MAN s dng kt ni c bng tn ln hn, s

khng cn s khc bit gia cc server ca mng vi cc routerc t ti thit b ca

khch hng v ti cc im POP ca nh cung cp mng na. Mt cng ty khc cung cp

cc dch v ngun cho cc doanh nghip ny by gic th thc hin t mt v tr trung

tm cng vi im POP. ng thi cng khng cn phi duy tr cc router, cc server v

cc firewall ti mi v tr khch hng. Kt qu l cc m hnh da trn thnh vin th ba

ny gic tnh kinh t hn rt nhiu. Khng nhng cc thit b mng c chia s gia

nhiu khch hng vi nhau m cng khng cn phi duy tr i bo dng thng xuyn

ti pha khch hng na.

1.1.2 Cu trc mng E-MAN

Kin trc mng Metro da trn cng ngh Ethernet in hnh c th m t nh hnh 1-1.

Phn mng truy nhp Metro tp hp lu lng t cc khu vc (cquan, to nh, ...) trongkhu vc ca mng Metro. M hnh in hnh thng c xy dng xung quanh cc vng

Ring quang vi mi vng Ring truy nhp Metro gm t 5 n 10 node. Nhng vng Ring

ny mang lu lng t cc khch hng khc nhau n cc im POP m cc im ny -

c kt ni vi nhau bng mng li Metro. Mt mng li Metro in hnh s bao phc

nhiu thnh ph hoc mt khu vc tp trung nhiu doanh nghip.


15/202



Hnh 0-1. Cu trc mng E-MAN in hnh

Mt kha cnh quan trng ca nhng mng li Metro ny l cc trung tm d liu, thngc t node quan trng ca mng li Metro c th truy nhp d dng. Nhng trung tm

d liu ny phc v ch yu cho ni dung cc host gn ngi s dng. y cng chnh l

ni m cc dch v t nh cung cp dch v khc (Outsourced services) c cung cp cho

cc khch hng ca mng E-MAN. Qu trnh truy nhp n ng trc Internet c cung

cp ti mt hoc mt sim POP cu thnh nn mng li Metro. Vic sp xp ny c

nhiu u im ph lin quan n qu trnh thng mi in t. Hin ti csh tng cho

mc ch phi hp thng mi in t cng gn ging nh li ca mng Internet, c nhiu

phin giao dch hn c x l v sau gim dn - y l hai u im ni tri khi t

chc mt giao dch thnh cng da trn s thc hin ca Internet.

1.1.3. Xu hng pht trin cng ngh mng

Hin ti, cc cng ngh tim nng c nhn nh l ng c xy dng mng MAN th

h mi ch yu tp trung vo 5 loi cng ngh chnh, l:

SDH-NG

Ethernet/Giagabit thernet (G)

RPR

WDM

Chuyn mch kt ni MPLS/GMPLS

Cc cng ngh ni trn ny c xy dng khc nhau c phm vi v cc phng thc m

chng sc s dng. Trong mt s trng hp, cc nh cung cp csh tng li trin

khai cng mt cng ngh cho cc ng dng khc nhau. V d, Gb c thc s dng

cung cp nng lc truyn ti cshoc cung cp cc dch v gi Ethernet trc tip n

khch hng.

Cc nh khai thc mng c xu hng kt hp mt s loi cng ngh trn cng mt mngca h, v tt c cc cng ngh sng gp vo vic t c nhng mc ch chung l:


16/202



Gim chi ph u t xy dng mng

Rt ngn thi gian p ng dch v cho khch hng

D phng dung lng i vi s gia tng lu lng dng gi

Tng li nhun t vic trin khai cc dch v mi

Nng cao hiu sut khai thc mng

a. SONET/SDH-NG

SONET/SDH-NG l cng ngh pht trin trn nn SONET/SDH truyn thng.

SONET/SDH-NG gi li mt sc tnh ca SONET/SDH truyn thng v loi b nhng

c tnh khng cn thit. Mc ch c bn ca SONET/SDH-NG l ci tin cng ngh

SONET/SDH vi mc ch vn cung cp cc dch v TDM nh i vi SONET/SDHtruyn thng trong khi vn x l truyn ti mt cch hiu qui vi cc dch v truyn d

liu trn cng mt h thng truyn ti.

V cbn, SONET/SDH-NG cung cp cc nng lc chnh nh chuyn mch bo v v

ring phc hi, qun l lung, gim st cht lng, bo dng t xa v cc chc nng gim

st khc. ng thi chc nng qun l gi cng c ci thin ng k vi Granularity

ln hn ca SONET truyn thng rt nhiu.

SONET/SDH-NG s dng cc cch ghp knh mi kt hp cc dch v khch hng

a giao thc thnh cc container SONET/SDH ghp o hoc chun. Cng ngh ny c th

c s dng thit lp cc MSPP TDM/gi lai hoc cung cp nh khung lung bt cho

mt cu trc mng gi. im hp dn nht ca SONET/SDH-NG l n c xy dng da

trn mt cng ngh c sn v pht huy nhng u im ca SONET/SDH.

Cc tiu chun v SONET/SDH-NG hin cng ang c pht trin, trong tiu chun

chnh l GFP G.7041 ca ITU-T.

b. Ethernet/Gigabit Ethernet

Ethernet l mt cng ngh c p dng ph bin cho mng cc b LAN hn hai thp

k qua, hu ht cc vn k thut cng nh vn xy dng mng Ethernet u cchun ha bi tiu chun IEEE.802 ca IEEE. Trong tt c cc cng nghc s dng

trong cc mng MAN hin nay th Ethernet l mt chc ch nhiu nht do c

nhng li th nhn gin v chc nng thc hin v chi ph xy dng thp.

Cng ngh Ethernet c ng dng xy dng mng vi 2 mc ch:

Cung cp cc giao din cho cc loi hnh dch v ph thng, c kh

nng cung cp nhiu loi hnh dch v thoi v s liu, v d cc kt ni

Ethernet ring, cc kt ni Ethernet ring o, kt ni truy nhp Ethernet,


17/202



Frame Relay hoc cc dch v ng hm thng qua cc c s h

tng mng truyn ti khc, chng hn nh ATM v IP.

Ethernet c xem nh mt cch truyn ti cs, c kh nng truyn

ti lu lng trn nhiu tin ch truyn dn khc nhau.Hin ti cc giao thc Gigabit Ethernet c chun ho trong cc tiu chun IEEE

802.3z, 802.3ae, 802.1w v cung cp cc kt ni c tc 100 Mbt/s, 1 Gbt/s hoc vi

chc Gbt/s (c th l 10Gbt/s) v h trrt nhiu cc tin ch truyn dn vt l khc nhau

nh cp ng, cp quang vi phng thc truyn ti n cng (half-duplex) hoc song

cng (full-duplex). Cng ngh Ethernet h trtrin khai nhiu loi hnh dch v khc nhau

cho nhu cu kt ni kt ni im - im, im - a im, kt ni a im... . Mt trong

nhng ng dng quan trng tp hp chc nng ca nhiu loi hnh dch v kt ni l dch

v mng LAN o (virtual LAN), dch v ny cho php cc cquan, doanh nghip, cc tchc kt ni mng tcc phm vi a l tch ri thnh mt mng thng nht.

c. RPR

RPR l mt dng giao thc mi phn lp MAC (Media Acces Control). Giao thc

ny c p dng nhm mc ch ti u ho vic qun l bng thng v hiu qu

cho vic trin khai cc dch v truyn d liu trn vng ring. RPR (hot ng pha

trn so vi L1 Ethernet Phy v SDH) thc hin cch bo v vi gii hn thi gianbo v l 50 ms trn cshai phng thc: phng thc steering v phng thc

wrapping. Cc nt mng RPR trong vng ring c th thu cc gi tin c a ch

ho gi n nt bi chc nng DROP v chn cc gi tin gi t nt vo trong

vng ring bi chc nng ADD. Cc gi tin khng phi a ch ca nt s c

chuyn qua. Mt trong nhng chc nng quan trng na ca RPR l lu lng

trong vng ring s c truyn ti theo 3 mc u tin l High, Medium, LOW

tng ng vi 3 mc cht lng dch v QoS (quanlity of service). RPR cho phps dng truyn ti khng ch gi dng Ethernet m cn cho php truyn ti vi bt

k dng giao thc gi no. RPR cung cp cc chc nng MAC gi cho vic truyn

ti d liu trn cc vng ring. RPR hot ng c lp vi cc lp mng v lp vt

l, do vy cc nh cung cp s c th s dng cng ngh ny nh mt thnh phn

quan trng trong cc gii php cng ngh p dng cho vic xy dng mng MAN.

Hin ti giao thc RPR c chun ho trong tiu chun IEEE 803.17 ca IEEE

v c rt nhiu hng sn xut thit b tung ra cc sn phm RPR thng mi.


18/202



d. WDM

Hin nay cng ngh WDM c quan tm rt nhiu trong vic la chn gii php

xy dng mng truyn ti quang cho mng th. Th trng thng mi xut

hin rt nhiu cc sn phm truyn dn quang WDM ng dng cho vic xy dngmng MAN. Cc h thng WDM thng mi ny thng thng c cu hnh c th

truyn ng thi ti 32 bc sng vi tc 10Gbit/s v c th trin khai vi cc

cu trc t-p mng ring, ring/mesh hoc mesh.

Cng ngh WDM cho php xy dng cc cu trc mng xp chng s dng cc

t-p v cc kin trc khc nhau. V d, nh cung cp dch v c th s dng WDM

mang lu lng TDM (nh thoi) trn SONET/SDH trn mt bc sng, trong

khi vn trin khai mt cng ngh truyn ti d liu (chng hn nh GE over

RPR) trn mt bc sng khc.

Vic s dng WDM trong MAN l mt phng thc c hiu qu kinh t nht l khi

cung trao i lu lng trn mng ln, ti nguyn v cp v si quang cn t.

Tuy vy nu s dng cng ngh WDM ch n gin l ghp dung lng

SONET/SDH hin ti vi cc ring ngang hng th thc t li khng tit kim c

cc chi ph u t (v mi bc sng thm vo li i hi mt thit bu cui ring

ti cc nt mng). Hn na vic qun l li trnn phc tp hn khng c li trong

vic cung cp dch v kt ni im - im. gii quyt nhng vn ny, cc nh

sn xut cung cp cc thit b WDM cho mng MAN a thm mt chc nng

mi cho php qun l lu lng mc quang. iu dn n s ra i ca

mt th h cc MSPP WDM mi, y cng l mt loi sn phm mng MAN chnh.

MSPP WDM c nhng ng gp quan trng nh:

Lu lng c qun l im-im ti mc quang H trc nhiu loi cng ngh v dch v, c loi hin c v tng

lai

Cung cp mt nn tng cho vic chuyn i sang mt cng ngh v cu

trc mng mi, c bit l cng ngh v cu trc mng ton quang

e. MPLS/GMPLS


19/202



MPLS l mt cng nghng vai tr then cht trong cc mng th mc d cng

ngh ny khng c thit k dnh ring cho th trng mng th.

Chc nng cbn ca MPLS l cho php cc bnh tuyn/chuyn mch thit lp

cc lung im - im (hay cn gi l cc lung chuyn mch nhn) vi cc ctnh QoS xc nh qua bt k mng loi gi hay t bo. Do vy cho php cc nh

khai thc cung cp cc dch v hng kt ni (v d cc dch v VPN cho doanh

nghip), x l lu lng v qun l bng tn. Kh nng tng thch vi IP v ATM

cho php thit lp cc chuyn mch IP/ATM kt hp nhm vo cc l do kinh t

hay mra mt chin lc loi b ATM.

Cc tiu chun MPLS c nghin cu nhng chng vn cha c ban hnh.

V d tiu chun MPLS h trcc VPN lp 2 vn ch mi dng draft. VPN lp 2

lin kt hot ng (cc mng ring o) rt cn thit cho vic cung cp cc mng

ring ti cc khch hng doanh nghip.

Trong thc t, vn cha c mt s thng nht v phng thc m MPLS sc s

dng trong mng th. Mt s nh cung cp cho rng MPLS c thc s dng

mi ni, k c phn mng bin. Nhng mt s khc th li cho rng v cbn

l mt cng ngh ca phn mng li MAN.

MPLS c thit k cho cc dch v trong cc mng gi, nhng mt phin bn mi

l GMPLS th li c pht trin cho cc mng ton quang, bao gm cc kt ni

SONET/SDH, WDM v truyn trc tip trn si quang. GMPLS c kh nng cu

hnh cc lung lu lng dng gi v c cc dng lu lng khc.

GMPLS m ra kh nng t c s hp nht cc mi trng mng s liu

truyn thng v quang. Tuy nhin, vn cn rt nhiu kh khn khi trin khai

GMPLS trn cc mng lp t.MPLS v phin bn mrng ca n c thng vai tr l mt lp tch hp cho cc

mng MAN nhm cung cp tnh thng minh v l mt lp keo kt dnh gia

mng quang WDM pha di v lp dch v IP. Vi vai tr ny, n c th cung cp

chc nng cung cp bng tn im-im, x l v qun l lu lng v khi phc

dch v. Hiu qu hn, MPLS c th hot ng nh mt lp thit lp cho cc dch

v hng kt ni.


20/202



1.2 Cc dch v cung cp qua mng Ethernet Metro

1.2.1. Gii thiu

Mng th h sau (NGN-Next Generation Network) l mng da trn cng ngh

chuyn mnh gi, c kh nng cung cp a dch v, bng rng, cho php qun l

cht lng dch v (QoS). N cung cp cho ngi dng kh nng truy cp khng

hn ch cc dch v c hu tuyn ln v tuyn trn mt nn tng cng ngh chung

(nh ngha theo ITU-T Study Group 13). NGN l mt cch tip cn hng dch v

(service driven approach) cho s pht trin ca mng vin thng tin hc [1].

Hin nay, nhiu nh cung cp dch v ICT (Information Communication

Technology) trn th gii , ang v s trin khai cc dch v NGN, triple-play (d

liu, thoi, hnh nh) da trn cng ngh Ethernet. Cng ngh Ethernet ban u

c s dng cho mng LAN. Nhng vi s tin b gn y v mt cng ngh,

Ethernet ang c nhiu nh cung cp dch v ICT quan tm.

Sau y cung cp ci nhn tng quan v dch v Ethernet (Ethernet service), da

trn cng trnh (t thng 4 nm 2003) ca Metro Ethernet Forum (MEF), mt t

chc cc nh cng nghip trong lnh vc ICT c v vic cung cp h tng mng

Metro s dng cng ngh Ethernet. Phn ny c th gip ngi s dng dch vEthernet hiu c nhng dng v c im khc nhau ca dch v Ethernet, v

gip cho nhng nh cung cp din t r rng kh nng cung cp dch v ca h.

1.2.2. Li ch dng dch v ethernet

Nhiu nh cung cp dch v cung cp dch v Metro Ethernet. Mt s nh cung cp

m rng dch v Ethernet vut xa phm vi mng ni th (MAN) v vn n phm vi

mng din rng (WAN). Hng ngn thu bao c s dng dch v Ethernet v s

lng thu bao ang tng ln mt cch nhanh chng. Nhng thu bao ny b thu ht bi

nhng li ch ca dch v Ethernet em li, bao gm:

- Tnh d s dng.

- Hiu qu v chi ph (cost effectiveness).

- Linh hot.

Tnh d sdng


21/202



Dch v Ethernet da trn mt giao din Ethernet (Ethernet interface) chun, ph bin

dng rng ri trong cc h thng mng cc b (LAN). Hu nh tt c cc thit b v my

ch trong LAN u kt ni dng Ethernet, v vy vic s dng Ethernet kt ni vi nhau

sn gin ha qu trnh hot ng v cc chc nng qun tr, qun l v cung cp (OAM

&P).

Hiu qu v chi ph

Dch v Ethernet lm gim chi ph u t (CAPEX-capital expense) v chi ph vn hnh

(OPEX-operation expense):

- Mt l, do s ph bin ca Ethernet trong hu ht tt c cc sn phm mng nn giao din

Ethernet c chi ph khng t.

- Hai l, t tn km hn nhng dch v cnh tranh khc do gi thnh thit b thp, chi ph

qun tr v vn hnh thp hn.

- Ba l, nhiu nh cung cp dch v Ethernet cho php nhng thu bao tng thm bng

thng mt cch kh mm do.. iu ny cho php thu bao thm bng thng khi cn thit

v h ch tr cho nhng g h cn.

Hnh 0-2 so snh chi ph hng thng cho 3 loi dch v

Tnh linh hot

Dch v Ethernet cho php nhng thu bao thit lp mng ca h theo nhng cch hoc l

phc tp hn hoc l khng th thc hin vi cc dch v truyn thng khc. V d: mt


22/202



cng ty thu mt giao tip Ethernet n c th kt ni nhiu mng v tr khc nhau

thnh lp mt Intranet VPN ca h, kt ni nhng i tc kinh doanh thnh Extranet VPN

hoc kt ni Internet tc cao n ISP. Vi dch v Ethenet, cc thu bao cng c th

thm vo hoc thay i bng thng trong vi pht thay v trong vi ngy ngy hoc thm

ch vi tun khi s dng nhng dch v mng truy nhp khc (Frame relay, ATM,).Ngoi ra, nhng thay i ny khng i hi thu bao phi mua thit b mi hay ISP c cn

b k thut n kim tra, h trti ch.

1.3 M hnh dch v Ethernet

xc nh cc loi hnh dch v cung cp qua mi trng Ethernet, trc ht cn xem xt

m hnh tng qut. M hnh dch v Ethernet l m hnh chung cho cc dch v Ethernet,

c xy dng trn da trn css dng cc thit b khch hng truy cp cc dch v.

Trong m hnh ny snh ngha cc thnh phn cbn cu thnh dch v cng nh mtsc tnh c bn cho mi loi hnh dch v. Nhn chung cc dch v Ethernet u c

chung mt sc im, tuy nhin vn c mt sc tnh c trng khc nhau cho tng

dch v ring. M hnh cbn cho cc dch v Ethernet Metro nh ch ra trn hnh sau.

Hnh 0-3 M hnh cung cp cc dch v Ethernet qua mng MAN

Cc dch v Ethernet c cung cp bi nh cung cp mng Ethernet Metro. Thit b

khch hng ni n mng ti giao din ngi dng - mng (UNI) s dng mt giao din

Ethernet chun 10Mbps, 100Mbps, 1Gbps hoc 10Gbps.

Trong m hnh ny ch yu cp n cc kt ni mng m trong thu bao c xem l

mt pha ca kt ni khi trnh by v cc ng dng thu bao. Tuy nhin cng c th c

nhiu thu bao (UNI) kt ni n mng MEN t cng mt v tr.

Trn cscc dch v chung c xc nh trong m hnh, nh cung cp dch v c thtrin khai cc dch v c th tu theo nhu cu khch hng. Nhng dch v ny c thc

Thit b

khch hng

Giao din

ngi dng-

mng (UNI)

Giao din

ngi dng-

mng (UNI)

Thit b

khch hng

Mng Metro

Etherent


23/202



truyn qua cc mi trng v cc giao thc khc nhau trong mng MEN nh SONET,

DWDM, MPLS, GFP, .... Tuy nhin, xt t gc khch hng th cc kt ni mng xut

pht t pha khch hng ca giao din UNI l cc kt ni Ethernet.

1.4 Cc loi dch v Ethernet.Hin ti cc dch v Ethernet c chia thnh 2 loi ln: Cc ng Ethernet ring, chy

trn h tng SONET/SDH hoc trn mng LAN trong sut qua cc chuyn mch (best-

effort) v si quang hin cha s dng. Cc chun mi c pht trin chn cng ngh

ph hp cho php ngi khai thc chuyn n vng c ph thch hp v lun chuyn cc

dch v mt cch mm do trong cc cng ngh hin c ng thi h tr tho thun mc

dch v (SLA).

Cc dch v Ethernet c th chy trn hu ht csh tng hin c. Cc t chc chun ho

trong khi c gng tm cch nh ngha thnh phn cu thnh dch v Ethernet vp phimt vn kh khn: n s chy trn SDH, ATM, IP/MPLS, PDH, WDM, hay OTN? Vn

trnn phc tp hn khi xt n th tc khung chung (GFP) v lc iu chnh dung

lng lin kt (LCAS) cng nh khi tnh n cc ring gi hi phc (RPR).

Phng php truyn ti nh hng ng kn cch nh ngha mt dch v Ethernet. Kt

qu xut hin rt nhiu tn dch v Ethernet trn th trng vi kh nng khc nhau, ph

thuc vo thit b ca nh sn xut v phng php truyn ti c s dng thc hin

dch v. Nhng dch v chnh trong s gm ng dy ring Ethernet, ng dy

ring o Ethernet, dch v dy ring o, dch v Relay Ethernet, dch v m rng LAN,LAN ring o Ethernet, dch v LAN trong sut v LAN ring Ethernet.

Cc lp dch v Ethernet c th xc nh thng qua tiu chun IEEE802.1p, cc bit u tin

ngi dng, cc bt MPLS EXP hoc Diffserv Codepoints, tu thuc vo cng ngh phn

phi dch vc s dng. Tuy nhin, hin nay cha c chun c th cho vic qun l lu

lng Ethernet h trcc lp dch v Ethernet. Do , cc gii php ring hoc cc gii

php da trn cc chun khc nh DiffServ ang c thc thi.

Cc nh cung cp thit b SONET/SDH cho rng thit b ca h c th h trcc dch v

Ethernet s dng hn hp GFP, VCAT, LCAS, v RPR. Cc nh cung cp chuyn mch

ATM a dch v cho rng c th b sung cc dch v Ethernet trn cc thit b ca h v c

th cung cp dch v LAN trong sut Ethernet over ATM vi QoS m bo, trong khi

cc nh cung cp cc thit bnh tuyn th cho rng h c th h trnhiu Ethernet VPN

qua mt mng li IP c s h trca MPLS.

Mt cch tip cn hin nay l xc nh cc dch v Ethernet mt cch tng qut v cho

php nh cung cp quyt nh la chn cng ngh phn pht dch v c th mang li li

nhun m khng cn phi lm xo trn cc dch v hin c.

Nhiu chuyn gia c kinh nghim trong lnh vc mng cho rng: i vi cc nh cung cp

dch v, c th b sung Ethernet khi vic cung cp dch v c chi ph thp hn nhiu so vi


24/202



khi xy mi. Hin ti MEF a ra hai loi dch v Ethernet s trnh by di y, cc

loi dch v khc sc nh ngha trong thi gian ti.

Hnh 0-4 Mi quan h dch v Ethernet trong phn lp mng

1.4.1 Dch v knh Ethernet:Dch v knh Ethernet cung cp kt ni o Ethernet im - im (EVC) gia hai UNI nh

minh ho trn hnh 1-15. Dch v E -Line c s dng cho kt ni im - im.

Hnh 0-5: Kt ni o Ethernet im - im (EVC) qua mng MEN

Dch v E - Line c th cung cp bng tn i xng cho truyn s liu theo hai hng.

dng phc tp hn n c th to ra tc thng tin tt nht (CIR) v kch thc khi tt

nht (CBS), tc thng tin nh v kch thc khi nh tr, jitter, mt mt thc hin

gia hai UNI c tc khc nhau.

Ti mi UNI c th thc hin ghp dch v t mt s EVC khc nhau. Mt s EVC im -im c thc cung cp trn cng mt cng vt l ti mt trong cc giao din UNI trn

mng.

Mt dch v E-Line c th cung cp cc EVC im - im gia cc UNI tng t s

dng cc chuyn tip khung PVC kt ni cc bn vi nhau.

Mt dch v E - Line c th cung cp mt kt ni im - im gia cc UNI tng t nhau

n mt dch vng ring TDM. y l dch v kt ni gia hai UNI v to ra cc

khung dch v hon ton trong sut gia cc UNI, tiu v ti ca khung c trng cho

UNI ngun v ch.

EVC im - im


25/202



Nhn chung dch v E - Line c thc s dng xy dng cc dch v tng t cho

chuyn tip khung hoc cc ng thu ring. Tuy nhin, di bng tn v cc kh nng kt

ni ca n ln hn nhiu.

1.4.2 Dch v LAN Ethernet:Dch v LAN Ethernet cung cp cc kt ni a im, chng hn c th kt ni mt s UNI

vi nhau nh ch ra hnh sau.

Hnh 0-6: M hnh kt ni a im

S liu thu bao gi t mt UNI c thc nhn ti mt hoc nhiu UNI khc. Mi UNI

c kt ni n mt EVC a im. Khi c cc UNI thm vo, chng c kt ni ncng EVC a im do n gin ho qu trnh cung cp v kch hot dch v.

Dch v E - LAN theo cu hnh im - im.

Dch v E - LAN c thc s dng kt ni ch hai UNI, iu ny dng nh tng

t vi dch v E - Line nhng y c mt s khc bit ng k. Vi dch v E - Line,

khi mt UNI c thm vo, mt EVC cng phi c b sung kt ni UNI mi n

mt trong cc UNI tn ti. Hnh 1-7 minh ho khi mt UNI c thm vo v s c mt

EVC mi c b sung tt c cc UNI c th kt ni c vi nhau khi dng dch vu E

- Line.

EVC Kt ni a im n a im


26/202



Hnh 0-7 . Qu trnh thc hin khi thm mt UNI vo mng MAN

Vi dch v E - LAN, khi UNI mi cn thm vo EVC a im th khng cn b sung

EVC mi v dch v E - LAN s dng EVC a im - a im. Dch v ny cng cho php

UNI mi trao i thng tin vi tt c cc UNI khc trn mng. Trong khi vi dch v E

Line th cn c cc EVC n tt c cc UNI. Do , dch v E - LAN ch yu cu mt EVC

thc hin kt ni nhiu bn vi nhau.

Tm li, dch v E - LAN c th kt ni mt s lng ln cc UNI v s t phc tp hn

khi dng theo dng li hoc hub v cc kt ni s dng cc k thut kt ni im - im

nh Frame Relay hoc ATM. Hn na, dch v E-LAN c thc s dng to mt

lot dch v nh mng LAN ring v cc dch v LAN ring o, trn csny c th trin

khai cc dch v khch hng.

Tm li dch v Ethernet cung cp cc kt ni lp 2 cho cc dch v khc c trin khai

trn v c thc cung cp trn cc nn cng ngh khc nhau nh SDH. RPR, MPLS hay

chnh cng ngh Ethernet.

EVC kt ni im n im

Khu vc thm mi


27/202



2. XU HNG V TNH HNH TRIN KHAI DCH V ETHERNET

2.1. Xu hng pht trin dch v Ethernet

Cc dch v ch yu c cung cp bi mng MAN bao gm:

Truy nhp internet tc cao: y l loi dch v rt pht trin hin nay.

Mng lu tr (SAN): Th trng dch v mng lu tr hin ang pht trinnhanh chng v y l mt trong cc dch vi hi kt ni bng tn ln100Mbit/s v cao hn na. S pht trin bng n v s liu khin chovic qun l cc ngun ti nguyn ny trong cc doanh nghip ngy mtkh khn hn. Cc dch v mng SAN s l mt gii php kinh t hn, vtin cy hn trong vic duy tr cc kho d liu khng l. Vic lu tr s liu

t xa cn p ng c cc yu cu phc hi trc nhng thm ho, ngnnga s gin on v m bo s lin tc trong cc hot ng kinh doanh.

Cc mng ring o lp 2 (L2VPN): Cc gii php VPN em n cho cckhch hng kh nng tng hiu sut cng vic nhng truy nhp an tonn cc ng dng v d liu.

Cc dch vng dng gia tng: Cc nh cung cp dch vng dng hinang c gng tm kim th trng cho cc sn phm ca h tuy nhin hmi cht c nhng thnh cng mc vi mt vi ng dng cbn.Gartner Group nh gi rng th trng dch vng dng st 25 triu la vo nm 2004 (so vi 3,5 triu la nm 2001).

Dch v LAN thng sut (LAN im-im v LAN a im-a im):Cung cp kt ni mng trc tip gia cc vn phng xa nhau do vy lmgim tnh phc tp trong vic iu hnh mng, lm tng cht lng v cithin tnh mm do v kh nng nng cp mng.

VoIP

H tng ng trc mng th LAN - FR/ATM VPN

Extranet

LAN kt ni n cc ti nguyn mng (cc thnh vin ca mng LAN cth truy nhp trung tm d liu t xa)

Theo cc kt qu nghin cu, iu tra th trng ca mt s t chc nhYankee Group, Infonetics Research, IDC c th thy mt sim trong hng

pht trin dch v trong cc mng MAN nh sau:


28/202



Cc dch v s liu s pht trin trung bnh hn 50%/nm v dch v thoitng hn 15%/nm

Cc dch v theo yu cu s tng rt mnh v chng cung cp c bngtn ng lc, ng hn. Do s lm gim ng k gi thnh dch v.Khch hng s ch phi tr cho lng bng tn m h s dng. Nhs linhhot ny m cc nh cung cp dch v mng cng s lm gim c cc chi

ph khai thc nhvic phn b v cung cp bng tn theo nhu cu.

Theo iu tra v Ethernet MAN nm 2003 ca Yankee Group, hin nayethernet ang l mt gii php hiu qu thay th cc dch v mng s liutruyn thng, m ch yu l dch v knh ring, do cc dch v ethernet cgi thp hn 25-35% gi ca dch v knh ring. y l mt gii php chi

ph/megabit thp v c bng tn ln.

th trng dch v ethernet tng vi tc trn 30%/ nm n nm 2008 vt nhiu t $/nm trn ton th gii.

Bng 0-1 dbo th trng pht trin dch v Ethernet trn ton th gii

Hnh 0-8 T trng dch v ethernet theo mng MAN v ng trc USA


29/202



C th tham kho nhng l do khin khch hng la chn cc dch v ethernet(theo iu tra ca Cisco System and Sage Research nm 2003)

Hnh 0-9. Cc l do la chn dch v Ethernet MAN ca khch hng

Nhu cu ca cc th trng i vi cc dch v ethernet MAN c th hintrn bng 1.2, ng u l cc th trng ti chnh v chm sc sc kho.

Trong th trng chm sc sc kho, s bng n cc ng dng i hi kt nicht lng cao, bng tn ln.

Gio dc cng l mt th trng quan trng i vi cc dch v ethernet, vicc ng dng c ch nht l: hc t xa, truy nhp internet, ni dung.

Xu hng th trng vi cc dch v ethernet l s thay i ca n t mt dchv best-effort thnh mt dch v vi tin cy cao v cc mc m bo dch v.

Khi xu hng ny vn tip tc xy ra th cc th trng nh ti chnh, chm sc sckho, bo him, gio dc v cc dch v php lut s vn tip tc s dng ethernetp ng cc nhu cu ca h.

Khc

ng dng v c tnh

Bng tn theo yu cu

Chi phi thit b pha

Nn c m n d

Hi t (s liu, thoi,

Cht lng dch v/an

Bng tn thay i

Qun l mng n gin

Chi ph bng tn/Mbps thp

Thi gian cung cp

Phn trm


30/202



Bng 0-2: Nhu cu i vi dch v Ethernet MAN

Th trng T l (%)Ti chnh 72

Chm sc sc kho 55Gio dc 53Bo him 40Chnh ph 39Cng ngh thng tin 38Cc dch v php lut 33Sn xut 32Vin thng 29Cc dch v thng mi 29Cc ngnh phc v cng cng 25Vn ti 19

Xy dng 13Truyn thng/gii tr 5

(Ngun : Yankee Group, 2004)

Hnh 0-10 Li nhun tcc dch v truy nhp Ethernet MAN trn th gii

Gartner Group d bo rng s cc u cui Ethernet trong cc to nh gmnhiu vn phng s tng t con s gn bng 0 nm 2000 ti 500.000 vo nm 2006.Hin tng ny r rng hn cc vng th c tp trung cao cc ton nh gmnhiu vn phng v cc khu chung c. S pht trin mnh nht xy ra khu vcChu Thi Bnh Dng v chu u, Trung , v chu Phi. Trong cc nc ny,Ethernet MAN xut hin nh mt phng thc truy nhp c a chung. IDCd bo rng li nhun t cc dch v Ethernet MAN trn ton th gii st 9,7 t la nm 2006, trong chu Thi Bnh Dng s chim 7,9 t.

- Cc khch hng doanh nghip c xu hng s dng ngy cng nhiu cc dchv truy nhp internet, thu my ch v cc dch v s liu. Internet trthnh mt

100000

2002 2003 2004 2005 2006 2007

US Ty u APAC ROW

Triu

la


31/202



phng tin v cng quan trng i vi cc khch hng ny. Cc nh cung cp dchv v cc nh cung cp csh tng cng t mi quan tm rt ln vo cc dch vs liu c li nhun cao ny.

- Cc khch hng doanh nghip ngy cng quan tm n dch v mng lu tr,m mt trong cc l do s dng l l do an ninh, bng chng l s trin khai rngri cc k hoch phc hi khi nhng thm ho ca rt nhiu cng ty trn thgii.V d, c khong 70% trong s 1000 cng ty ca Fortune trn ton th gii trin khai cc mng khi phc thm ho qua cc cng trnh cp quang kt ni htng csca h trong mt mng th no .

Rt nhiu cc chnh ph ra nhng hng dn v iu lut lin quan n vn phc hi trc nhng thm ho. V d U.S Federal Rerve v U.SSecurities&Exchange Commission a ra khuyn co rng cc ngn hng phi

t cc trung tm d liu d phng chnh v t xa cch nhau 100 dm v phi khiphc c cc hot ng mng trong vng 2 gik t lc c thm ho.

Tuy vy, an ninh cng khng phi l l do duy nht trong xu hng s dngcc dch v mng SAN. L do th 2 l chi ph ngy cng tng ca thi gian chtca mng. Cc cng ty ln trung bnh mt khong 3,6% li nhun cho thi giancht ca mng trong mt nm. Vi cc ng dng c tnh cht cp bch th ccdoanh nghip s mt i nhng khon li nhun vo thi gian cht ca mng. Ngita c tnh rng mt nh khai thc TV tr tin s mt khong 125.000 la /gi, i

vi mt cng ty tn dng l khong 2,6 triu la/gi.. Cc doanh nghip th khngh mun mt li nhun ca h v do vy cc dch v SAN trthnh mt la chnhp dn i vi h.

Tnh mm do trong khai thc cng l mt l do khin cc khch hng doanhnghip mun gi ngun d liu thng tin ca h qua cc dch v SAN.

Theo nghin cu ca Infonetics, li nhun t cc dch v trung tm d liu stng 27%, t 7,3 tola ti 9,3 t la t nm 2003 n 2007. Nhng l do cbnthc y khch hng mun xy dng cc trung tm s liu ca h:

+ 90% ni l v l do an ninh

+ 85% v cht lng

+ 79% v tnh sn sng

+ 78% v l do iu khin

Tin tng vo nh cung cp

Chi ph

D qun l

iu khin

Tnh sn sng ca cc

ngun ti nguyn

c tnh

An ton

Yu

t

50 %

52 %

63 %

78 %

79 %

85 %

90 %


32/202



Hnh 0-11: Nhng l do xy dng trung tm s liu ca khch hng (theo mtiu tra ca Infonetics Research)

- VPN v dch v an ton mng : Cc t chc ln c thc v an ninh hn cc tchc loi trung bnh v nh : trong s cc t chc ln, th cng c ti 40% sdng cc phng php an ninh mng ti thiu nht.Trong nm 2004, s c ti 51%trong s li nhun t dch v an ninh l t cc t chc ln, tip theo l cc t chcnh v trung bnh. Li nhun t cc dch v an ton mng trn ton cu trong nm2003 t 3,1 t l v c d bo t 7,7 t vo nm 2008, m nhu cu ngycng ln ca cc t chc mi kch c, s phc tp ca cc gii php an ton hinti v cng do mong mun tng li nhun t pha cc nh cung cp dch v.

Theo Infonetics Research, li nhun t phn mm v phn cng firewall vVPN trn ton th gii tng ln 11% ti 733 triu la vo qu I nm 2004 tqu 4 nm 2003, v s tng 12% ti 823 triu la vo qu I nm 2005. Bc M lkhu vc tim nng vi gn 70% trong s cc cng nhn v nhn vin lm vic lung s dng cc dch v VPN vo nm 2006 (theo Infonetics).

2.2. Tnh hnh trin khai dch v Ethernet

Nh phn trn cho thy hin nay trn th gii vic trin khai cung cp dch v ethernet rt

mnh m, tc pht trin dch v trn 30% / nm. Theo thng k cha y ca

LightReading nm 1/2006 c hn 469 dch vc cung cp t 260 cng ty bao gm

c cc cng ty, tp on ln n cc cng ty nh mi tham gia th trng.


33/202



.

Hnh 0-12 T l cc nh khai thc trin khai cc loi dch v trong tng s 75nh khai thc c iu tra(2005 HeavyReading)

Sau y nhm ti tng hp mt s nt chnh t 260 nh khai thc v gii thiu mt s

nh cung cp in hnh trn th gii v trong khu vc nhTrung quc , Thi Lan, USA.

Vi mc tiu ca chng gii thiu v tnh hnh trin khai cc dch v Ethernet, sau y s

tng hp v tm tt cc kho st ca cc nh cung cp dch v bao gm cc thng tin theo

mu dng sau:

Thng tin v nh cung cp dch v

o Tn cng ty

o Sin thoi/ email

Thng tin dch v

o Tn dch v

o a ch web ca trang cung cp dch v

o Khch hng mc tiu (Bn s, bn l)

o Loi dch v, bao gm cc loi sau:

dch v loi 1, Converged access. Khch hng c cung cp ccdch v chy trn kt ni Ethernet. Cc dch v l:

Frame Relay

Switched Ethernet

IP VPN

Internet access

Emulated private line

VOIP

Storage Video


34/202



Other

Dch v loi 2: Cc kt ni Ethernet im- im gia 2 im ca

khch hng

Dch v loi 3: cc kt ni a im, c chuyn mch gia nhiu v

tr ca khch hngThng tin a l vng cung cp dch v

o Nc

o Bang/ Tnh ( trong cc nc ln nh U.S. v China)

Thng tin v csh tng mng

o Mi trng truy nhp mng ca khch hng (Cp ng, cp quang, Khc)

o Cc cng ngh chnh c s dng cung cp dch v

o Thit bc s dng cung cp dch v

2.2.1 Tng hp sliu kho st cung cp dch v ethernet:

( ngun LightReading- 10/2006)

Tng s nh cung cp c khost:

260

Tng s dch v 469 Khch hng mc tiuBn s 257

Bn l 383

Dch v loi 1: Converged access. Khch hng c cung cp cc dch v chytrn kt ni Ethernet. Cc dch v l:Frame Relay 17

Switched Ethernet 144

IP VPN 155

Internet access 305

Emulated private line 200

VOIP 147

Storage 121

Video 163

Dch v loi 2: Cc kt ni Ethernet im- im gia 2 im ca khch hng (Eline)S dch v 304Dch v loi 3: cc kt ni a im, c chuyn mch gia nhiu v tr ca khchhng (ELAN)S dch v 190

Mi trng truy nhp mng ca khch hng


35/202



Copper 108

Fiber 373

Other(eg. wireless 15


36/202

Chng I: Xu hng

ti: 98-06-KHKT-RD http://www.ebook.edu.vn

2.2.2 USA

C trn 210 dch v t cc nh cung cp . sau y gii thiu 1 s nh cung cp chnh nh AT&T, Bellsouth

AT&T:

STT Tn nhcung cp

Tn dchv

a ch Web Khchhng

Mitrng

truy nhp

loi dchv 1

Loi 2:Ethernet p-

p

- Bn s - PrivateLine

- Bn l - Storage

1 AT&TCorp.

ACCU-RingService -EthernetSvcChannel

http://www.business.att.com/service_overview.jsp;jsessionid=Q5MS2OJS0RY3FLAZBYZCFEY?repoid=Product&repoitem=eb_accu-ring_service&serv=eb_accu-ring_service&serv_port=eb_connectivity&serv_fam=eb_access

- Fiber

- Video

Yes

- Bn s - Copper - IP VPN2 AT&TCorp.

Bus InternetAccess

Service -MISEthernetAccess

http://www.business.att.com/service_overview.jsp;jsessionid=Q5MS2OJS0

RY3FLAZBYZCFEY?repoid=Product&repoitem=eb_managed_internet_service&serv=eb_managed_internet_service&serv_port=eb_connectivity&serv

_fam=eb_access

- Bn l - Fiber - Internet

access

No


- Bn l - Storage

3 AT&TCorp.

DedicatedEntranceFacilityService -EthernetSvcChannel

http://www.business.att.com/service_overview.jsp?repoid=Product&repoitem=eb_dedicated_entrance_facility_service&serv=eb_dedicated_entrance_facility_service&serv_port=eb_connectivity&serv_fam=eb_access

- Fiber

- Video

Yes

- Bn s - FrameRelay

- Bn l - IP VPN

- Storage

4 AT&TCorp.

EthernetAccess toIP/VPN

(MPLS)

- Fiber

- Video

Yes


- Bn l - Storage

5 AT&TCorp.

EthernetOption ofPrivate Line- LocalService

http://www.business.att.com/service_overview.jsp;jsessionid=Q5MS2OJS0RY3FLAZBYZCFEY?repoid=Product&repoitem=eb_privateline&serv=eb_privateline&serv_port=eb_connectivity&serv_fam=eb_data

- Fiber

- Video

Yes


37/202

Chng I: Xu hng


(EPLS-MAN)


- Bn l - Storage

6 AT&TCorp.

EthernetOption ofPrivate Line- US Nat'lService(EPLS-WAN)

http://www.business.att.com/service_overview.jsp;jsessionid=Q5MS2OJS0RY3FLAZBYZCFEY?repoid=Product&repoitem=eb_privateline&serv=eb_p

rivateline&serv_port=eb_connectivity&serv_fam=eb_data

- Fiber

- Video

Yes

- Bn s - SwitchedEthernet

- Bn l - Storage

7 AT&TCorp.

EthernetSwitchedService -MAN

http://www.business.att.com/service_overview.jsp;jsessionid=Q5MS2OJS0RY3FLAZBYZCFEY?repoid=Product&repoitem=eb_ethernet_switched_service-man&serv=eb_ethernet_switched_service-man&serv_port=eb_connectivity&serv

_fam=eb_access

- Fiber

- Video

Yes

- Bn s - Copper - FrameRelay

- Bn l - Fiber - IP VPN

- Internetaccess- Voice- Storage

8 AT&TCorp.

IntegratedNetworkConnection

Service(INCS)(Option ofFR/ATM)

http://www.business.att.com/service_overview.jsp;jsessionid=Q5MS2OJS0RY3FLAZBYZCFEY?repoid=Product

&repoitem=eb_frame_relay_service&serv=eb_frame_relay_service&serv_port=eb_connectivity&serv_fam=eb_data

- Video

Yes

- Bn s - SwitchedEthernet

- Bn l - PrivateLine- Storage

9 AT&TCorp.

UltravailableManagedOptEringService

http://www.business.att.com/service_overview.jsp;jsessionid=Q5MS2OJS0RY3FLAZBYZCFEY?repoid=Product&repoitem=eb_ultravailable_optering_service&serv=eb_ultravailable_optering_service&serv_port=eb_connectivity&serv_fam=eb_access

- Fiber

- Video

Yes


- Bn l - Storage

10 AT&TCorp.

UltravailableNetworkService -EthernetSvcChannel

http://www.business.att.com/service_overview.jsp;jsessionid=Q5MS2OJS0RY3FLAZBYZCFEY?repoid=Product

&repoitem=eb_ultravailable_network_service&serv=eb_ultravailable_network_service&serv_port=eb_connectivity&serv_fam=eb_access

- Fiber

- Video

Yes


38/202

Chng I: Xu hng


BELLSOUTH

STT Tn nhcung cp

Tn dchv

a ch Web Khchhng

Mitrng

truy nhp

loi dchv 1

Loi 2:Ethernet p-p

- SwitchedEthernet- Internetaccess- PrivateLine- Voice

1 BellSouthCorp.

BellSouthMetroEthernetService

http://www.bellsouthlargebusiness.com/upload/documents/BB1211.pdf - Bn l - Fiber

- Video

Yes

MetNet Communications Inc.

STT Tn nh cungcp

Tndch v

a ch Web Khch hng Mi trngtruy nhp

loi dch v1

Loi 2Etherne


1 MetNetCommunications Inc.

MetNetMAN

http://www.metnetcom.com/Handout_6-18-04.pdf

- Bn l - Fiber

- Video

Yes



MetNetNET

http://www.metnetcom.co

m/Handout_6-18-04.pdf

- Bn l - Fiber

- Video

Yes

- Internetaccess- Voice


MetNetWAN

http://www.metnetcom.com/Handout_6-18-04.pdf

- Bn l - Fiber

- Storage

Yes


39/202

Chng I: Xu hng


- Video

Qwest Communications International Inc.

STT Tn nh cungcp

Tn dchv

a ch Web Khchhng

Mitrng

truynhp

loi dch v 1 Loi 2Ethern

p-p

- Bn s - Copper - Frame Relay- Bn l - Fiber - Switched

Ethernet- IP VPN- Internetaccess- Private Line- Voice

1 QwestCommunicationsInternational Inc.

iQNetworking

http://www.qwest.com/largebusiness/products/networking/index.html

- Storage

Yes

2 QwestCommunicationsInternational Inc.

MetroOpticalEthernet

http://www.qwest.com/Bns/pcat/ixcmoe.html

- Bn s - Fiber - Frame Relay Yes

Verizon Communications Inc.

STT Tn nh cungcp

Tn dchv

a ch Web Khchhng

Mitrng

truynhp

loi dch v 1 Loi 2:Ethernet

p-p

- Private Line1 VerizonCommunicationsInc.

EthernetPrivate Line http://www22.verizon.com/enterprisesolutions/Inc

ludes/SiteUtilities/JCMSSkeleton.jsp?filePath=/Anonymous/Default/ProductDetail/Data/VzOptical_p.html

- Bn l - Fiber- Storage


40/202

Chng I: Xu hng


2 VerizonCommunicationsInc.

SwitchedEthernetService

http://www22.verizon.com/enterprisesolutions/Includes/SiteUtilities/JCMSSkeleton.jsp?filePath=/Anonymous/Default/Product

Detail/Data/TransLAN_p.html

- Bn l - Fiber - SwitchedEthernet

Yes


TransparentLANService

http://www.verizonmarketing.com/bsg/pdf/TLS.pdf

- Bn l - Fiber Yes


VerizonDedicatedWavelengthService(DWS)

http://www22.verizon.com/enterprisesolutions/Includes/SiteUtilities/JCMSSkeleton.jsp?filePath=/Anonymous/Default/ProductDetail/Data/DWS_p.html

- Bn l - Fiber - Storage Yes

- Private Line5 VerizonCommunications

Inc.

VerizonOptical

Networking(VON)

http://www22.verizon.com/enterprisesolutions/Inc

ludes/SiteUtilities/JCMSSkeleton.jsp?filePath=/Anonymous/Default/ProductDetail/Data/VzOptical_p.html

- Bn l - Fiber- Storage

Yes

2.2.3 Trung Quc

STT Tn nh cung cp Tn dchv

a ch Web Khchhng

Mitrng

truynhp

loi dch v1

Loi Ether

p-p

- IP VPN- Internetaccess

1 ChinaTelecommunicationsCorp.

China Vnet n/a - Bn l - Copper

- Video

Yes


41/202

Chng I: Xu hng


- Copper2 China Tietong Crnet n/a - Bn l- Fiber

- Internetaccess

No

3 Hutchison GlobalCommunications Ltd.

Hutch - IPTransit

http://www.hgc.com

.hk/eng/bus_data_i

nter_iptransit.html

- Fiber

- Bn s - IP VPN4 PCCW Ltd. InternationalIP-VPN

http://www.pccw.co

m/eng/Products/Bus

iness/DataServices

/InternationalIP-

VPN.html

- Bn l- Fiber

- Internetaccess


- Private Line- Voice

5 BT Group plc LANExtensionServices

http://www.btgloba

lservices.com/busi

ness/global/en/pro

ducts/lan_san/inde

x.html

- Bn l - Fiber

- Storage

Yes

- IP VPN6 Changfeng n/a n/a - Bn l- Internetaccess

No

- IP VPN7 Chengdu Tailong n/a n/a - Bn l - Copper- Internetaccess

No

- IP VPN8 China NetworkCommunicationsGroup Corp. (ChinaNetcom)

n/a n/a - Bn l - Copper- Internetaccess

Yes


9 Fibrlink n/a n/a - Bn l

- Voice

No

10 Gehua Youxian n/a n/a - Bn l - Internetaccess

No

11 Great Wall BroadbandNetwork Service Co.

n/a n/a - Bn l - Fiber - Internetaccess

No


42/202

Chng I: Xu hng


Ltd.12 Guangdong CATV n/a n/a - Bn l - Internet

accessNo

13 Hangzhou CATV n/a n/a - Bn l - Internetaccess

No

- IP VPN14 MCI Inc. Private IP - Bn l - Fiber- Voice

Yes

15 China MobileCommunications Corp.

Sui-E-Xing n/a - Bn l - Video No

- Bn s - Copper - SwitchedEthernet

- Bn l - Fiber - IP VPN-Other(eg.wireless)

- Internetaccess

- Private Line

16 Yipes EnterpriseServices Inc.

Yipes GAN(GlobalAreaNetwork)

http://www.yipes.c

om/downloads/GAN10

-28.pdf

- Storage

Yes

2.2.4 Thi lan

STT Tn nh cung cp Tn dchv

a ch Web Khchhng

Mitrng

truynhp

loi dch v1

Loi 2:Ethernet

p-p

1 Hutchison GlobalCommunicationsLtd.

Hutch - IPTransit

http://www.hgc.co

m.hk/eng/bus_data

_inter_iptransit.

html

- Fiber


http://www.pccw.c

om/eng/Products/B - Bn l- Fiber

- Internet


43/202

Chng I: Xu hng


usiness/DataServi

ces/International

IP-VPN.html

access

- IP VPN- Internet

access- Private

Line- Voice

3 BT Group plc LANExtension

Services

http://www.btglob

alservices.com/bu

siness/global/en/

products/lan_san/

index.html

- Bn l - Fiber

- Storage

Yes

2.2.5 Japan

C trn 30 dch v t cc nh cung cp sau y gii thiu hng in hnh NTT

STT Tn nh cungcp

Tndch v

a ch Web Khchhng

Mitrng

truynhp

loi dchv 1

Loi 2:Ethernet p-p

- Bn s1 NTTCommunications

GlobalSuperLink

http://www.ntt.com/index-e.html - Bn l

- Fiber Yes N

2.2.6 Korea

STT Tn nh cungcp

Tn dch v a ch Web Khchhng

Mitrng

truynhp

loi dch v 1 Loi Ethern

p-p

1 Asia Netcom DedicatedInternetAccess

http://www.asiane

tcom.com/pub/sale

s/DIA.pdf

- Bn l - Fiber - Internetaccess

- Copper2 FLAG Telecom FLAG GlobalEthernet

http://www.flagte

lecom.com/service

s/FLAG_Global_Eth

ernet_Product_She

- Bn s- Fiber

- IP VPN Yes


44/202

Chng I: Xu hng


et.pdf

3 HutchisonGlobalCommunicationsLtd.

Hutch - IPTransit

http://www.hgc.co

m.hk/eng/bus_data

_inter_iptransit.

html

- Fiber


http://www.pccw.c

om/eng/Products/B

usiness/DataServi

ces/International

IP-VPN.html

- Bn l- Fiber

- Internetaccess


- Private Line- Voice

5 BT Group plc LANExtensionServices

http://www.btglob

alservices.com/bu

siness/global/en/

products/lan_san/

index.html

- Bn l - Fiber

- Storage

Yes

6 Hansol iGlobe

Co. Ltd.

Metro-NET http://www.hansol

iglobe.com/english/internet/metro.

htm

- Fiber - Internet

access

Yes

7 Hansol iGlobeCo. Ltd.

TransparentLAN Service(TLS)

http://www.hansol

iglobe.com/englis

h/internet/metro.

htm

- Fiber - Internetaccess

Yes

8 KT Corp. UNKNOWN09- Bn s - Copper - Switched

Ethernet- Bn l - Fiber - IP VPN

-Other(eg.

wireless)

- Internetaccess

- Private Line

9 Yipes EnterpriseServices Inc.

Yipes GAN(Global AreaNetwork)

http://www.yipes.

com/downloads/GAN

10-28.pdf

- Storage

Yes


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Chng I: Xu hng


2.2.7 France

C trn 46 dch v cung cp t nh khai thc. Sau y gii thiu dch v ca FrancSTT Tn nhcung cp

Tndch v

a ch Web Khchhng

Mi trngtruy nhp

loi dchv 1

Loi 2:Ethernet

p-p

loi EtherMpo

1 FranceTelecom

InterLAN1.0

http://www.francetelecom.com/fr/entreprises/grandes_entreprises/solutions/reseaux/donnees/interlan_1_0.ht

ml

Yes Ye


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Chng II: Cc gii php cng ngh v thit bmng quang Ethernet

ti: 98-06-KHKT-RD 34

3. KT LUN CHNG 1

NGN l xu hng tt yu ca qu trnh pht trin csh tng ICT. NGN l mt cch tip

cn hng dch v (service driven approach). Vic p ng cc nhu cu dch va dng, bngthng rng, cht lng cao l mt thch thc cho cc nh cung cp, khai thc ICT. Dch vEthernet l mt la chn ph hp cho khu vc th. Hin nay, trn th gii ni chung vtrong khu vc ni ring cc nh cung cp dch v truyn thng cng nh nh cung cp miu nhy vo th trng hp dn ny. Khng nghoi xu th Vit nam cng bc utrin khai mng cung cp dch v Ethernet , in hnh l Buu in Tp. H Ch Minh ang trinkhai dch v bng rng Metronet trn nn dch v Ethernet m khch hng u tin l UBNDTp. H Ch Minh.

L mt th trng mi, MAN ang l mt mnh t tim nng i vi cc nhkhai thc v cung cp mng. Trong , s pht trin v lu lng s liu v kt ni

bng rng, v s hi t dch v l nhng yu t cbn thc y s pht trin ca mngMAN. Trong xu hng pht trin mng MAN cung cp dch v Ethernet thhin r qua cc con s d bo cng nh tnh hnh trin khai rng khp trn ton thgii. D bo s tng trng trong cc nm ti theo cc nghin cu, iu tra ca IDC,Yankee Group). Cc t chc ny cng a ra cc con s v s pht trin dch vca mng MAN vi cc nhn nh ng ch nh: Cc dch v s liu s pht trintrung bnh hn 50%/nm v dch v thoi tng hn 15%/nm, cc dch v theo yu cus tng rt mnh trong cc nm ti v ethernet hin ang l mt gii php hiu quthay th cc dch v mng s liu truyn thng, m ch yu l dch v knh ring, docc dch v ethernet c gi thp hn 25-35% gi ca dch v knh ring. y l mtgii php chi ph/megabit thp v c bng tn ln.


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Muc lucCHNG 2. ........... CC GII PHP CNG NGH V THIT B V MNG QUANGETHERNET CA CC HNG CUNG CP THIT B TRN TH GII ....................411. XU HNG PHT TRIN TH TRNG CNG NGH, THIT B MNGQUANG ETHERNET ..................................................................................................... 41

1.1. Phn loi thit b ...................................................................................... 411.2. Th trng thit b mng ng trc......................................................... 421.2.1. Th trng thit b Router WAN ....................................................... 421.2.2. Th trng thit b ghp knh DWDM.............................................. 431.2.3. Th trng thit b SONET/SDH....................................................... 44

1.3. Xu hng pht trin th trng sn phm mng MAN Ethernet .............. 441.3.1 Thit b SONET/SDH MSPP ............................................................. 46

a. Tng quan v cng ngh...................................................................... 46b. V th trng ....................................................................................... 47

1.3.2 Thit b Ethernet-MAN ...................................................................... 48

a. Tng quan v cng ngh...................................................................... 48b. Slc v th trng........................................................................... 48

1.3.3 Thit b chuyn mch Ethernet 10Gbit/s ............................................ 50a. Slc v cng ngh .......................................................................... 50

b. Slc v th trng........................................................................... 501.3.4 Thit b cng ngh Ring gi RPR....................................................... 521.3.5 Thit b h thng WDM MAN ........................................................... 53

a. Slc v cng ngh .......................................................................... 53b. Slc v th trng........................................................................... 54

2. CC GII PHP CNG NGH, THIT B IN HNH V MNG QUANG

ETHERNET CA CC NH CUNG CP THIT B TRN TH GII.................... 552.1 Gii php thit b mng v cng c qun l quang Ethernet..................... 56ADVA Optical Networking ............................................................................. 56Alcatel .............................................................................................................. 56Atrica................................................................................................................ 57CIENA ............................................................................................................. 57Cisco Systems .................................................................................................. 58Corrigent Systems............................................................................................ 59Covaro Networks ............................................................................................. 59DIATEM Networks ......................................................................................... 60

Extreme Networks ........................................................................................... 60Fujitsu .............................................................................................................. 60Hammerhead Systems...................................................................................... 60Hatteras Networks............................................................................................ 60InfoVista .......................................................................................................... 60Lucent Technologies........................................................................................ 61Mahi Networks................................................................................................. 61METRObility ................................................................................................... 61

Native Networks .............................................................................................. 61Nortel ............................................................................................................... 61

Overture Networks........................................................................................... 62RAD Data Communications ............................................................................ 63


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Redux Communications................................................................................... 63Riverstone Networks........................................................................................ 63Siemens ............................................................................................................ 64Tellabs.............................................................................................................. 64World Wide Packets ........................................................................................ 652.2 Gii php thit bo................................................................................... 66Agilent Technologies ....................................................................................... 66Spirent Communications.................................................................................. 66Sunrise Telecom Incorporated ......................................................................... 66Shenick Network Systems ............................................................................... 66

3. TNH HNH TRIN KHAI MNG QUANG ETHERNET CA CC NH CUNGCP DCH V TRN TH GII .................................................................................. 68

3.1 Korea Telecoms ......................................................................................... 683.2 AT&T......................................................................................................... 68

DEF.............................................................................................................. 68

Chuyn mch Ethernet................................................................................. 69Dch v truy nhp mng ACCU Ring ......................................................... 69Ultravailable Network ................................................................................. 69

3.3 Hng vin thng Unicom ca Trung quc................................................. 693.4 Mt s nh khai thc khc ......................................................................... 70

4. KT LUN CHNG 2............................................................................................ 71


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CC GII PHP CNG NGH V THIT B V MNG QUANGETHERNET CA CC HNG CUNG CP THIT B TRN TH GII

Chng ny s gii thiu v cc gii php cng ngh, thit b v xu hng pht trin cacc hng cung cp thit b ln v mng quang ethernet trn th gii. Chng 1 cho thyhin nay vic nhu cu v trin khai dch v ethernet ch yu tp trung trong mi trngmng MAN, do vy trong chng ny s tp trung gii thiu gii php cng ngh mngMAN cung cp dch Ethernet ca cc hng thng qua cc ti liu, bo co, v websites cacc hng cung cp thit b. Cc sn phm ca cc hng ch mang tnh minh ho cho cclnh vc, cc dng sn phm,...

1. XU HNG PHT TRIN TH TRNG CNG NGH, THIT BMNG QUANG ETHERNET

1.1. Phn loi thit b

Hnh 0-1 minh ho cch phn loi cc dng thit b quang ch yu trn th trng hin naytheo cc ng dng mc tiu ca chng. Trc tung chia mng theo cc vng a l access,metro v core; trc honh phn chia theo kh nng x l theo lp ca cc h thng, tc lti mc chng qun l tn hiu (WDM, SDH, GbE, hay IP). Vic phn chia ny c nhiuhng v t chc nghin cu th trng s dng (LightReading, Tenor Network, Telcodia,Cisco...).Vic phn loi cc chc nng v th trng mc tiu ca cc dng sn phm ch mang tnhtng i. Trong phn mng ng trc - Core bao gm cc h thng chuyn mch vtruyn dn. Ti mc si thp nht ca lp vt l (lp 1) l cc h thng truyn dnDWDM c ly di (Long Haul) v cc di (Ultra LH). Cc b ni cho quang OXC c th

chuyn mch mc bc sng v si trong lp vt l. V cc OXC l cc phn t c khnng cu hnh, nn chng c mt sc im ca lp vt l v mt phn ca lp 2. Thitb lp 2 ca phn mng Core bao gm cc OXC c kh nng nhm lu lng (Grooming -qun l mc STM-n) v cc chuyn mc

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