Download - IP RAN 100NGN
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IP RAN 2G, 3G & LTE
Muhamad YopanCCIE#38903
Ericsson Indonesia
100NGN Workshop
June 17-19, 2013
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Traditional telecommunication network
A dedicated infrastructure is required to support different services
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IP convergence refers to the capability of the Internet to act as a single foundation for various functions that traditionally had their own platforms.
IP Convergence
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2G & 3G Architecture
RAN
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What is IP RAN
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IP RAN is a reference solution
2G
3G
LTE
BSC
RNC
cell site
– Physical and logical connectivity– HW recommendations– Redundancy– 2G/3G/LTE/Wifi co-location– Quality of Service– Synchronization– Security– IP Addressing– Management
A reference for how to connect cell site and switch site:
switch siteMBH MPBN
SIU/TCU
MPBN
CPG / MME
IP RAN IP RAN
Switch siterouter
OSS-RC
Synchsrv
IPSecMBH
cell sitecell site
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IP RAN Design Goals
The IP RAN solution abstracts away the diverse transport networks -Multiple technologies and providers but one network view for the RAN applications
Provides a unified set of services to the RAN applications-Synch, QoS handling, SLA monitoring, security, ...
Utilizes simple, cost efficient transport services
Enables multiple transports to cell site- Different transports for different traffic types with different requirements (QoS vs. Availability)
Dual transport redundancy
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IP RAN solution is aligned with mbh and Mpbn
2G
3G
LTE
BSC
RNC
CGWMSS
MME
CGW
IP RAN MBH
LRAN, Access
MPBN
HRAN, METRO
IP RAN MPBNFor Mobile Core
IP site Infrastructure
Multivendor
MBH
Multivendor
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• The IP RAN solution is fully aligned with the Mobile Backhaul and the MPBN solutionsTogether they form “Mobile Transport”, and provides end-to-end transport services.
Mobile Transport
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IP RAN Engineering Aspect
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IP RAN Network Design Approach
Build
RequirementSpecification
Detailed DesignSpecification
NetworkAcceptance
Addressing
Traffic Modeling
Topology
Security
L3 RoutingL2 Switching
Node & InterfaceDimensioning
Protection & Redundancy
Traffic Separation
Quality of Servicesetting
Solution DesignSpecification
Tunneling &Firewalling
Start-up &Info Gathering
Solution Design
Detailed Design
Conclusion
Integration
Build
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Competencies required
IPBasic
- IP Addressing- VLAN- Static routing- Dynamic routing (OSPF, IS-IS)- STP (MSTP, PVST, RSTP)- VRRP, HSRP- QOS- BFD
Optional:- IP MPLS - VPN L2/L3- MPLS TP- Tunneling- Metro E- IP SLA
Mobile broadband- 2G Architecture- 3G Architecture- Product Knowledge
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IuPs
IuPs
MPLS
MPLS
IuB/IPMub/IP
IuB/IPMub/IP
3G
CBU
3G
Router border Operator 2
IuCs
SGSN in pool
IuCS, IuPS, IuB, IuR
IuCS, IuPS, IuB, IuR
RNCIuCs
Operator BOperator A RAN SHARING TOPOLOGY
Metro E
Router border Operator 1
IuPS vrf
Nb vrf
Static routeIuCS, IuR
IuPS
IuB
PE 1
IuCS, IuR
IuPS
IuB
PE 2
RNC
MSC
SGSN
SGSN 1
SGSN 2
SGSN 3
MSC
PE
PE
PE PE
IuB/IPMub/IP
IuB/IPMub/IP
3G
CBU
3G
Metro E
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Synchronization in IP RAN
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IP RAN recommends the SoIP solution• SoIP is independent on what transport network is
used as long as it provides IP connectivity and the right characteristics
• Based on standard NTP and/or 1588v2– Same transport network requirements, same sync
algorithm
• SoIP server integrated in the RNC boards– SoIP over NTP only supported
• Standalone SoIP server required for 1588v2• SoIP client in SIU, TCU 02 and RBSes
– 1588v2 currently only supported by the SIU/TCU 02
• Proven in live customer networks
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FREQUENCY SYNCRONIZATION USING SIU/TCU
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FREQUENCY SYNCRONIZATION WITHOUT SIU/TCU
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SECURITY
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RAN security challenges
• User plane traffic:– GSM: Abis is not encrypted from BSC to RBS– WCDMA: Iub frames are encrypted (3GPP standard) from RNC to UE– LTE: Can be natively protected using IPSec
• Control plane traffic:Is un-encrypted for GSM, WCDMA and LTE.– Can be protected using IPSec for GSM and LTE– Can be protected using external IPSec equipment for WCDMA
• O&M traffic:– Is protected on application level using SSL for both GSM, WCDMA and LTE
(Ericsson solution)– IPsec is supported for LTE O&M and can be activated if needed, to get an extra
level of security
• Highest priority is to protect BSC/RNC site and OSS from external intrusion.
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IPSec in LTE• eNodeB supports IPSec (currently for IPv4 only) to protect traffic
– Tunnel mode– Encryption and integrity (ESP) according to 3GPP
• Anti-replay protection• 3DES and AES encryption• MD5 and SHA-1 integrity
– Certificates based IKEv2 key handling
• Separate tunnels for UP/CP/Synch and O&M. – One IPsec tunnel for UP/CP and Synch, and one for O&M. (O&M is also
SSL-protected inside the IPsec tunnel).– Redundant tunnels monitored using Dead Peer Detection
• Auto integration also supports IPSec– Using IKEv2 Configuration Payload
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BEHAVIOR OF FLOWS
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QOS PRIORITY HANDLING• IP RAN solution provides
recommendations for:
– Traffic classification
– Prioritization
– Scheduling
– Link dimensioning (including for adaptive modulation)
•The solution resolves RAN congestion in a controlled and predictable way• Common QoS recommendations apply for GSM/CDMA/WCDMA/LTE
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24
PCRF
GbIu
S1-MME
Iu
S11
Gy
Rx+
SGi
HLR/HSS
S5
User planeControl plane
Gn
S13
3G
LTE
2G
PDN
Serving
DM USD
GxGateway
MME
SGSN
Gn
S1-U
GrEIR
S10
S16
X2 S6a
CSFB/IWF
SGs
OFCS
MME
GMLC SMLC
SLgSLs
IMS
E-CSCFP-CSCF
Mw
M1MGCF PSAP
Positioning
Emergency
E/// OSS -SQWOSS
Mul
Lte architecture
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The transformation
Backhaul (IP/Ethernet)
NodeBBTS
Radio intelligent moving to eNodeB
Backhaul transition to IP/Ethernet
RNC bearer mobility
evolves to SGW
MSC voice and packet
data switching
evolve into SGW
CS and PS evolve into
a unified all-IP, IMS domain
Best effort to e2e QoS IP anchor moves to PDH GW
Internet browsing to Web 2.0+
Backhaul PS CoreRNC
SGSN GGSN
CS Core
eNodeB SGW
MMEPCRF
PDN GW
Today
LTE
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