архив прош.сесий / архив прош.сесий / sinkhr_v_paket_setyakh
.pdf
Портфолио SP продуктов Cisco
Распространение частоты и времени (IEEE1588)
ITU-T G.8265.1 Telecom Profile planned
MWR2941
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ME3600X-24CX |
ASR901 |
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ASR9000 |
Cisco7600 |
ASR903 |
ME3600X-24CX |
MWR2941 |
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ASR901 |
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Hardware |
RSP440& |
SIP-400 |
All Interfaces |
All Interfaces |
All Interfaces |
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2nd Gen Linecards |
SYNCE-SPA |
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Supported |
Ordinary Master |
Ordinary Master |
Ordinary Master |
Ordinary Master |
Ordinary Slave |
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Clock |
Ordinary Slave |
Ordinary Slave |
Ordinary Slave |
Ordinary Slave |
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BoundaryClock |
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Modes |
BoundaryClock |
BoundaryClock |
BoundaryClock |
BoundaryClock |
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IPv4Unicast & |
IPv4Unicast & |
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PTP |
IPv4Unicast |
IPv4Unicast & |
IPv4Unicast & |
Unicast |
Unicast |
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Transport |
Unicast Negotiation |
Unicast |
Negotiation |
Negotiation |
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Negotiation |
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Options |
IPv4Mixed Multicast |
Negotiation |
IPv4Mixed |
Ipv4Mixed |
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Multicast |
Multicast 1) |
1) MWR2941only 2) First release to supportPTP on MWR2941 3) First Release to support PTP onASR901
© 2012 Cisco and/or its affiliates. All rights reserved. |
CiscoPublic |
41 |
Внешние интерфейсы
Частота и время
ASR901 ASR9000 RSP-440
2048kHz
2048kbps/ 1544kbps
10MHz 
1PPS 
ToD 
ME3600X/ME3800X |
ASR903 RSP1 |
© 2012 Cisco and/or its affiliates. All rights reserved. |
CiscoPublic |
42 |
Архитектура ASR9000
RSP0 |
Frequency |
RSP1 |
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Selection |
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BITS #0 
DTI/U
TI
BITS #1
SETS
10MHz 
1PPS 
PTP 
ToD 
PTP |
IngressLinecard |
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Packets |
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ETH |
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NPU |
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MAC |
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ETH |
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MAC |
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Hardware based |
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Time Stamping |
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MAC |
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ETH |
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N:2
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DTI/U |
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BITS #0 |
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PTP Stack and |
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TI |
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BITS #1 |
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SETS |
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ServoAlgorithm |
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10MHz |
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Encoder |
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Encoder |
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PTP |
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1PPS |
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ToD |
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Distributed PTP |
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EgressLinecard |
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PTP Packets |
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Encoder |
Packet |
Generation |
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CPU |
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Encoder |
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NPU |
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Prim & |
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MAC |
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ETH |
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Sec |
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MAC |
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ETH |
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2x |
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… |
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MAC |
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ETH |
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DPLL |
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DPLL |
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© 2012 Cisco and/or its affiliates. All rights reserved. |
CiscoPublic |
43 |
Архитектура ASR903
RSP0
Centralized PTP
PacketGeneration
BITS 
SETS
10MHz 
1PPS 
PTP 
ToD 
PTP |
IngressInterface |
Packets |
Module (IM) |
1pps
ETH 
PHY 
ETH 
PHY 
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… |
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HardwareETH |
based |
PHY |
Time Stamping |
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N:2
ToD
CPU
Frequency
Selection
PTP Stack and
ServoAlgorithm
ToD
1pps
2x |
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Prim & |
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Sec |
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2x |
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DPLL |
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DPLL |
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ToD
CPU
RSP1 |
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BITS |
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10MHz |
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PTP |
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1PPS |
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ToD |
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EgressInterface |
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Module (IM) |
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PTP Packets |
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1pps |
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ETH |
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PHY |
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ETH |
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PHY |
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ToD |
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PHY |
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ETH |
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© 2012 Cisco and/or its affiliates. All rights reserved. |
CiscoPublic |
44 |
Сценарии применения
Профили IEEE1588-2008 |
ITU G.8275.1 |
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TelecomProfile Time |
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Ожидаетсяв 2013 г. |
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4G Mobile RAN |
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IEEE1588 |
ITU G.8265.1 |
IEEE C37.238 |
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Default Profiles |
TelecomProfile Frequency |
Power Profile |
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Segment |
Industrial Solutions |
2G Mobile RAN |
SmartGrid |
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High SpeedTrading |
3G Mobile RAN |
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Profile ID / |
00-19-A7-00-01-00/ v1.0 |
00-19-A7-00-01-00/ v1.0 |
1C-12-9D-00-00-00/ v1.0 |
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Version |
00-19-A7-00-02-00/ v2.0 |
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PTP Modes |
One-way & two-way |
One-way & two-way |
Two-way |
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One-step& two-step |
One-step& two-step |
One-step& two-step |
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PTP Transport |
IPv4& Layer 2 Multicast |
IPv4Unicast Negotiation |
Layer 2 Multicast |
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Alternate BMCA |
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Master |
BMCA |
•QL(Clock Class) |
BMCA |
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Selection |
•PTSF |
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•LocalPriority |
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Path Delay |
Delay request/response |
Delay request/response |
Peer-to-Peer |
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Mechanism |
Peer-to-Peer |
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Management |
Mgmt Message per Clause 15 |
Не определено |
IEEE C37.238 MIB |
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Option |
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Node Types |
Ordinary Master/Slave, |
Ordinary Master и Slave |
Ordinary Master/Slave, |
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Boundaryи Transparent |
Boundaryand Transparent |
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BMCA… Best Master ClockAlgorithm QL … Quality Level |
PTSF … PacketTiming Signal Fail |
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© 2012 Cisco and/or its affiliates. All rights reserved. |
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46 |
Требования приложений
Technology
GSM
WCDMA(and LTE) FDD
WCDMATDD
TD-SCDMA
LTE TDD
CDMA2K
WiMAX Mobile
LTE-Advanced Services
Multi-Media Bcast SFN Service
DVB SFN
TDM transmission
Network Monitoring
Frequency
Read: better than…
Macro BS: ±50 ppb
Pico BS: ±100 ppb
WideArea BS: ±50 ppb Medium/LocalArea BS: ±100 ppb Home BS: ±250 ppb
OBSAI: ±16 ppb
WideArea BS: ±50 ppb
LocalArea BS: ±100 ppb
WideArea BS: ±50 ppb
LocalArea BS: ±100 ppb
WideArea BS: ±50 ppb
LocalArea BS: ±100 ppb
Macro Cell BS: ±50 ppb
Pico Cell BS and Femto Cell: ±100 ppb
Up to ± 1 ppb
Average target : ± 15 ppb
±5 ppb (CoMP)
± 50ppb
Up to ± 1 ppb
G.823/G.824/G.8261
N/A
Phase or Time Synchronization
Read: less than…
N/A
N/A
±2.5 µs between base stations
±3 µs between base stations
±3 µs between base stations May range from ±0.5µs to ±50µs
ToD (UTC) sync should be less than 3 μs and shall be less than 10 μs
Usual values between ± 0.5µs and ± 5µs
CoMP, relaying function, carrier aggregation
±0.5 µs [± 1 µs]
±1 µs
General agreement : ± 1 µs
N/A
± 1 to 100 µs ToD synchronization
for 10 µs to 1 ms measurement accuracy
© 2012 Cisco and/or its affiliates. All rights reserved. |
CiscoPublic |
47 |
ITU-T SG15 Q13 Work Plan
Approved |
Recently |
Planned for |
Future |
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« In force » |
approved |
09/2012 or |
Working |
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02/2012 |
07/2013 |
Items |
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Definitions / terminology
Basic /
Network requirements
Clocks
Methods
Profiles
Supplements
G.810
G.8260
(for synchronization in packet networks)
Frequency: G.826x
G.8261
SyncE NetwkJitter-Wander:
Included in G.8261
G.8261.1
(NetwkPDV_frequency)
G.8262
(SyncE -EEC)
G.8263
(Packet Clock)
G.8264
(SyncE – incl. ESMC)
G.8265
(Packet-architecture-Frequency)
G.8265.1
(PTPprofileFrequency)
G.8265.m
(PTPprofileFrequency m)
Time/Phase:G.827x
G.8271
G.8271.1
(NetwkPDV_time/phase
G.8271.2
may be needed in future
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T-GM (T-PM) |
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G.8272 |
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T-BC (+T-TSC?) |
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PRTC |
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G.8273
T-TSC
T-TC
G.8275
(Packet-architecture-time)
G.8275.1
(PTPprofileTime/phase)
G.8275.n
(PTPprofileTime/phase n)
G Suppl. x: Simulation of Transport of time over packet network
PRTC … Primary ReferenceTime Clock, T-GM … Telecom Grandmaster;T-BC … Telecom Boundary Clock; T-TC … Telecom TransparentClock; T-TSC … TransparentTime Slave Clock;
© 2012 Cisco and/or its affiliates. All rights reserved. |
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48 |
Первый Telecom Profile: ITU-T G.8265.1
Распространение частоты
Поддержка распространениячастотного синхросигнала
‒Функционирование в managed WideArea Networks (WANs)
‒Только Slave и Master модель (End-to-End PTP)
‒IPv4 negotiated unicast transport (defined in IEEE1588-2008 as option),
Взаимодействие с существующими сетями
‒SONET/SDH (G.813)
‒SyncE (G.8262)
‒Quality Level for Traceability (G.781)
Схемы резервирования совместно с лучшими практиками
‒Статические master либо slave состояние порта
‒Выбор источника (на основе G.781 модели) основано на QL Values и Local Priorities
BMCA… Best Master ClockAlgorithm
WAN… WideArea Network
© 2012 Cisco and/or its affiliates. All rights reserved. |
CiscoPublic |
49 |
Обмен сообщениями PTP
Опционально для IEEE1588-2008, используется в G.8265.1 1)
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MASTER |
SLAVE |
Signaling(Announce-grant) |
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Announce |
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Signaling(Sync-grant) |
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Announce |
SYNC |
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Duration |
SYNC |
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Interval |
SYNC |
… |
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Announce |
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SYNC |
… |
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Signaling |
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(Announce-grant) |
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Sync |
Announce |
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Duration |
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… |
Interval |
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Signaling (Announce-request)
Signaling (Sync-request)
Unicast
Renewal
Signaling (Announce-request)
One Way Example!
Signaling (Sync-request)
G.8265.1… PTP Telecom Profile for FrequencySynchronization
© 2012 Cisco and/or its affiliates. All rights reserved. |
CiscoPublic |
50 |