Packet synchronization deployment
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1 Packet synchronization deployment and challenges to mobile operator
2 Background Challenges 1. Network growth seek the transformation of services delivery mechanism. 2. Summary of previous setup: DESCRIPTION CURRENT TECHNOLOGY FUTURE TECHNOLOGY Backbone Fiber optic infrastructure based on DWDMand IP MPLS network Fiber optic infrastructure based on DWDMand IP MPLS network Aggregator Majority serve with SDH microwave Majorityserve with fiber optic Aggregator Majority serve with SDH microwave and minority serve with fiber optic infrastructure (SDH) & TDM bandwidth leasing from 3 rd party services provider Last mile Majority serve with PDH microwave and minority serve with fiber optic infrastructure (SDH) & TDM bandwidth leasing from 3 rd party services provider Majorityserve with fiber optic infrastructure (Packet Transport) & Ethernetbandwidth leasing from 3 rd party services provider and minority serve with packet microwave Mixture servewith packet microwave, fiber optic infrastructure (packet Transport) & Ethernet bandwidth leasing from 3 rd party services provider RAN solution 2G, 3G ATM 2G, 3G ATM, 3G-Hybrid (ATM & IP, 3G IP& LTE
3 Existing Transmission Architecture Technology International Link DWDM, ASON, SDH National Backbone Network Inter - The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again. DWDM, ASON, SDH OLNOs Regional Backbone Network The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again. Backbone Network SDH, PDH, SDH, EoSDH, PDH Ethernet Leasing Metro Network Metro Network SDH, PDH, SDH, EoPDH Last mile Access Network
4 Current Synchronization Architecture NTP PTP SSU Main site IEEE 1588 Transmission Network Slave IEE1588 Slave IEE1588 Collector or remote site
5 Station A Station B Station C Station F Station G Station H Current Access Network Overview Last Mile Tx Collector Station D RNC Location Microwave Network BSC RNC Main Collector X Fiber Optic Network TDM lease bandwidth Station I Station E Station J Station K
6 Station A Station B Station C Station F Station G Station H Target Access Network Overview Last Mile Tx Collector PTN Station D Packet Fiber Optic Network Main Collector X RNC Location BSC PTN RNC Packet Fiber Optic Network Ethernet lease bandwidth PTN PTN Station E Station I Station J Station K
7 Packet Synchronization Implementation Strategy TxCell Site TxRNC Site End to End Management QoS MPLS / PWE3 IP PTP Grand Master IEEE 1588 Node B PTN Synchronization with IEEE 1588 V2 PTN RNC -Slave IEEE 1588V2 part of RAN solution -Single VLAN per Node B -Transport with QoS capability -IEEE 1588V2 Grand Master at all RNC site -Connection is based on Layer 3
8 Overview Packet Synchronization Strategy The propose packet synchronization with combination of PTP IEEE 1588 V2 and synchronous Ethernet Slave IEEE 1588 V2 2) Synchronization over synchronous Ethernet Metro E Packet Network Metro E PTN FE GE GE IP Mw 1) Synchronization over PTP IEEE 1588V2 Synchronization trail IEEE 1588 RNC PTN CN 3) Synchronization over PTP IEEE 1588V2 over IP Mw BSC IEEE 1588 V2 Master IP Microwave not support Sync E Station A Station C Slave IEEE 1588 V2 Page 8 Slave IEEE 1588 V2 Station C Station C
9 Challenges Listed below are the pain points and challenges for synchronization network and packet based timing network:- 1. Multi transmission medium and technology: a. Radio, fiber optic and bandwidth leasing b. SDH, PDH, EOSDH, Metro E, Packet Transport Network & DWDM c. Multi transport vendor solution d. Multi bandwidth leasing technology 2. Multivendor RAN solution(3 Vendor) 3. Mixture RAN system: a. 2G, b. 3G ATM,3G-Hybrid(ATM& IP),3GIP c. LTE
10 Challenges 4. The implementation of third parties transmission provider creates difficulty in implement packet synchronization due to:- a. Limited capability to control third parties transmission provider equipment design. b. Control of packet synchronization source c. Old technology Ethernet over SDH (EOSDH) Ethernet over new packet transport (Metro E ) Ethernet over old packet transport
11 Challenges 5. Unable to monitor end to end synchronization signal performance. a. RAN operator doest not equip their system with clock signal performance(only on the status of the clock signal) 6. The stringent synchronization and timing requirement for real time services as proposed by the international standards, requires further study and analysis on how to adapt the new propose standards in the existing network.
12 7. Slave IEEE1588V2 location:- a. BuiltinRANsolution b. Built in Transport solution c. Stand alone solution Challenges Description In Band RAN Stand Alone Capability to manage synchronization Not Support Support performance by single NMS Capability to connect to two different Grand Master for protection Simplifyoperational in view of synchronization performance issue Support Support Not Support Support Slave equipment reliability Depend to RAN supplier Easy to manage Cost impact of RAN replacement Impact No impact Interworking issue between Slave to Grand Master Impact No impact
13 Challenges 8. Slave IEEE1588V2 improvement reliability requirement:- a. Dual parenting Grandmaster per Slave IEEE1588V2 b. Protection of Grandmaster network element 9. Ethernet Transport verification of compliance with IEEE 1588V2. Packet Network Client IEEE1588v2 P1 x:x:y:y P2 x:x:x:x Slave IEE st Priority 2nd Priority IEEE 1588 Main site : IP x:x:y:y IEEE 1588 Main site : IP x:x:x:x Grand Master
14 Ref GPS Clock Source Main Site Symmetricom TP5000 IEEE-1588 GM Router PTP Flow TDM Proof of concept basic setup Ref GPS Remote Site TA7500, RbIOC Ethernet Transport Router DlinkGE Hub Symmetricom TP500 IEEE-1588 Client Remote site Clock output measurement vs GPS Source
15 Proof of Concept- 3rd Party Ethernet Leasing VLAN Mbps Node B Tx IEEE 1588 Remote 2 Site A Transmission Collector 1 IEEE 1588 VLAN Mbps Tx Ethernet Lease Line VLAN Mbps PTN PTN Node B Remote Site B Synchronization IEEE 1588 V2 measurement point Tx 3 rd party Ethernet eqp 3 rd party Ethernet eqp IEEE 1588 RNC Main Site Scope of measurement in the Packet transport over 3 rd party Ethernetlease line implementation POC EthernetLease Line link performance test Mobile Access Network performancebefore migrate to Ethernet Lease Line Transmission Network performance Microwave only Transmission Network performance E2E Mobile Access Network migrate to Ethernet Lease Line medium Mobile Access Network performance after migrate to Ethernet Lease Line Synchronization IEEE 1588 V2 Testing
16 Proof of Concept- 3rd Party Ethernet Leasing VLAN Mbps Node B Tx IEEE 1588 Remote 2 Site A Transmission Collector 1 IEEE 1588 VLAN Mbps Node B Remote Site B Synchronization IEEE 1588 V2 measurement point Tx Ethernet Lease Line VLAN Mbps PTN PTN Tx 3 rd party Ethernet eqp Ethernet over SDH (EOSDH) 3 rd party Ethernet eqp IEEE 1588 RNC Packet Synchronization Source:- a)symetricomm b) Briliant Measurement:- a)clock Signal b) Packet Delay Variation RAN solution:- a) NSN b) Huawei Ethernet over new packet transport (Metro E ) Main Site Ethernet over old packet transport
17 Proof of Concept- 3rd Party Ethernet Leasingresult Ethernet over SDH (EOSDH) Ethernet over new packet transport (Metro E ) Ethernet over old packet transport Clock Signal Pass Pass Pass PDV value High Low High
18 Proof of Concept- Packet Transport Network VLAN Mbps Transmission Collector 1 IEEE 1588 Ethernet Lease Line 3 rd party VLAN Mbps Ethernet eqp PTN 3 rd party PTN Ethernet eqp Tx IEEE 1588 RNC Main Site Node B Tx IEEE 1588 Remote 2 Site A VLAN Mbps Node B Remote Site B Synchronization IEEE 1588 V2 measurement point Tx Remote Main Site PTN DWDM network Ethernet Lease Line 3 IEEE 1588 PTN Transmission Collector
19 Conclusion Although Packet Synchronization is complicated to deploy, but until today that is the only light for us to follow. The implementation of packet synchronization seek the following :- Transformation of mobile operator synchronization policy Transformation of synchronization personnel approach Transformation of network architecture to accommodate the technology changes
20 THANK YOU Page 20
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