Sttandarrd VDSL Technollogy, Teleinformatyka, VDSL

[ Pobierz całość w formacie PDF ]
Standard VDSL Technology
Overview of European (ETSI), North
American (T1E1.4) and International
(ITU-T) VDSL standard development
Vladimir Oksman
Broadcom Corporation
July 2001
IEEE 802.3 EFM SG
File: EFM_VDSL.ppt
Slide 1
Current status of VDSL standards

Europe (ETSI TM6)
- First issue (1997-2000) of the VDSL standard (2 parts: Functional
requirements, Transceiver specification) approved in December 2000
- Single-carrier modulation (SCM) and Multi-carrier modulation (MCM)
technologies are specified as possible implementations

North America (ANSI T1E1.4)
- First issue (1999-2001) of the trial-use VDSL standard (3 parts:
Functional requirements, SCM Transceiver specification and MCM
Transceiver specification) passed letter ballot in February 2001.
Comment resolution is expected to be completed in August 2001

International (ITU-T)
- First issue (started in 1999) will include only Functional requirements
(foundation document); expected to be ready for ballot in October 2001
IEEE 802.3 EFM SG
File: EFM_VDSL.ppt
Slide 2
 Typical installation
FTTEx
Customer
Premises
CO
Local
Exchange
AN
NT
ONU
VTU-R
OLT
VTU-O
FTTCab
Cabinet
Other
xDSL
BA-ISDN
HDSL,
ADSL
Customer
Premises
Feeder Cable
(200-2000 pairs)
NT
Core
N
etwork
Access
Network
ONU
VTU-R
VTU-O
Distribution Cable
(25-50 pairs)
Drop Cable
(2-5 pairs)

Abbreviations:
AN
- access network
ONU
- optical network unit
VTU
- VDSL transmission unit
IEEE 802.3 EFM SG
File: EFM_VDSL.ppt
Slide 3
Goals

Asymmetric transport:
Europe:
23/4, 14/3, 8.5/2, 6.5/2 Mb/s
North America:
22/3, 13/3 Mb/s

Symmetric transport:
Europe:
28/28
, 14/14, 8.5/8.5, 6.5/6.5 Mb/s
North America:
13/13
, 9/9, 6/6 Mb/s

Transport:
Slow path or Slow & Fast paths

Latency:
£
1.0 ms for Fast path
£
20 ms for Slow path, trade-off latency for burst
protection up to 500 us

POTS or BA-ISDN life-line over the same pair
IEEE 802.3 EFM SG
File: EFM_VDSL.ppt
Slide 4
 Environment

Unbundled loops

Spectrally compatible with:
- POTS
- all xDSL using the band below 1.1MHz
- T1/E1 (reduced performance)
- HAM radio (standard European and NA bands)
- AM radio

No centralized timing

No centralized management system
IEEE 802.3 EFM SG
File: EFM_VDSL.ppt
Slide 5
  [ Pobierz całość w formacie PDF ]