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IP RAN 2G, 3G & LTE Network Architecture.
Presented on 100NGN (Next Generation Network) Workshop, in Jakarta, June 17-19, 2013.

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  1. 1. IP RAN2G, 3G & LTEMuhamad YopanCCIE#38903Ericsson Indonesia100NGN WorkshopJune 17-19, 2013
  2. 2. Traditional telecommunication networkA dedicated infrastructure is required tosupport different services
  3. 3. IP convergence refers to the capability of the Internet to act as asingle foundation for various functions that traditionally had theirown platforms.IP Convergence
  4. 4. 2G & 3G ArchitectureRAN
  5. 5. What is IP RAN
  6. 6. IP RAN is a reference solution2G3GLTEBSCRNCcell site– Physical and logical connectivity– HW recommendations– Redundancy– 2G/3G/LTE/Wifi co-location– Quality of Service– Synchronization– Security– IP Addressing– ManagementA reference for how to connect cell site and switch site:switch siteMBH MPBNSIU/TCUMPBNCPG / MMEIP RAN IP RANSwitch siterouterOSS-RCSynchsrvIPSecMBHcell sitecell site
  7. 7. 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
  8. 8. IP RAN solution is aligned with mbhand Mpbn2G3GLTEBSCRNCCGWMSSMMECGWIP RAN MBHLRAN, AccessMPBNHRAN, METROIP RANMPBNFor Mobile CoreIP siteInfrastructureMultivendorMBHMultivendor
  9. 9. • The IP RAN solution is fully aligned with theMobile Backhaul and the MPBN solutionsTogether they form “Mobile Transport”, and provides end-to-endtransport services.Mobile Transport
  10. 10. IP RAN Engineering Aspect
  11. 11. IP RAN Network Design ApproachBuildRequirementSpecificationDetailed DesignSpecificationNetworkAcceptanceAddressingTraffic ModelingTopologySecurityL3 RoutingL2 SwitchingNode & InterfaceDimensioningProtection &RedundancyTraffic SeparationQuality of ServicesettingSolution DesignSpecificationTunneling &FirewallingStart-up &Info GatheringSolutionDesignDetailedDesignConclusionIntegrationBuild
  12. 12. Competencies requiredIPBasic- IP Addressing- VLAN- Static routing- Dynamic routing (OSPF, IS-IS)- STP (MSTP, PVST, RSTP)- VRRP, HSRP- QOS- BFDOptional:- IP MPLS- VPN L2/L3- MPLS TP- Tunneling- Metro E- IP SLAMobile broadband- 2G Architecture- 3G Architecture- Product Knowledge
  13. 13. Synchronization in IPRAN
  14. 14. IP RAN recommends the SoIP solution• SoIP is independent on what transport network isused as long as it provides IP connectivity and theright characteristics• Based on standard NTP and/or 1588v2– Same transport network requirements, same syncalgorithm• 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
  17. 17. SECURITY
  18. 18. 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 extralevel of security• Highest priority is to protect BSC/RNC site and OSS from external intrusion.
  19. 19. 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 alsoSSL-protected inside the IPsec tunnel).– Redundant tunnels monitored using Dead Peer Detection• Auto integration also supports IPSec– Using IKEv2 Configuration Payload
  22. 22. QOS PRIORITY HANDLING• IP RAN solution providesrecommendations for:– Traffic classification– Prioritization– Scheduling– Link dimensioning (including foradaptive modulation)•The solution resolves RANcongestion in a controlled andpredictable way• Common QoS recommendationsapply forGSM/CDMA/WCDMA/LTE
  23. 23. 24PCRFGbIuS1-MMEIuS11GyRx+SGiHLR/HSSS5User planeControl planeGnS133GLTE2GPDNServingDM USDGxGatewayMMESGSNGnS1-UGrEIRS10S16X2S6aCSFB/IWFSGsOFCSMMEGMLC SMLCSLgSLsIMSE-CSCFP-CSCFMwM1MGCF PSAPPositioning EmergencyE/// OSS -SQWOSSMulLte architecture
  24. 24. The transformation