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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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Chng I: Xu hng v tnh hnh trin khai dch v Ethernet
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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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Chng I: Xu hng v tnh hnh trin khai dch v Ethernet
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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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Chng I: Xu hng v tnh hnh trin khai dch v Ethernet
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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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Chng I: Xu hng v tnh hnh trin khai dch v Ethernet
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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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Chng I: Xu hng v tnh hnh trin khai dch v Ethernet
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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.
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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:
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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,
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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.
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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
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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.
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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
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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
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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
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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
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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
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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
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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
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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:
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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
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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
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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
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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 %
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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.
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.
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
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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
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Copper 108
Fiber 373
Other(eg. wireless 15
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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 s - PrivateLine
- 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 s - PrivateLine
- 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
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(EPLS-MAN)
- Bn s - PrivateLine
- 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 s - PrivateLine
- 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
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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
- Internetaccess- Voice- Storage
1 MetNetCommunications Inc.
MetNetMAN
http://www.metnetcom.com/Handout_6-18-04.pdf
- Bn l - Fiber
- Video
Yes
- Internetaccess- Voice- Storage
2 MetNetCommunications Inc.
MetNetNET
http://www.metnetcom.co
m/Handout_6-18-04.pdf
- Bn l - Fiber
- Video
Yes
- Internetaccess- Voice
3 MetNetCommunications Inc.
MetNetWAN
http://www.metnetcom.com/Handout_6-18-04.pdf
- Bn l - Fiber
- Storage
Yes
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- 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
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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
3 VerizonCommunicationsInc.
TransparentLANService
http://www.verizonmarketing.com/bsg/pdf/TLS.pdf
- Bn l - Fiber Yes
4 VerizonCommunicationsInc.
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
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- 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
- IP VPN- 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
- IP VPN- Internetaccess
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
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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
- Bn s - IP VPN2 PCCW Ltd. InternationalIP-VPN
http://www.pccw.c
om/eng/Products/B - Bn l- Fiber
- Internet
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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
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et.pdf
3 HutchisonGlobalCommunicationsLtd.
Hutch - IPTransit
http://www.hgc.co
m.hk/eng/bus_data
_inter_iptransit.
html
- Fiber
- Bn s - IP VPN4 PCCW Ltd. InternationalIP-VPN
http://www.pccw.c
om/eng/Products/B
usiness/DataServi
ces/International
IP-VPN.html
- Bn l- Fiber
- Internetaccess
- IP VPN- 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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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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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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Chng II: Cc gii php cng ngh v thit bmng quang Ethernet
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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