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Interworking with LTE

Interworking with LTE. Source: Mike Dolan Tony Lee Chair, TSG-SX.5 PDS Chair, TSG-AC.2.2 Alcatel-Lucent VIA Telecom mike.dolan@alcatel-lucent.com aslee@via-telecom.com. June 19, . cdma2000 Technology Webinar. Interworking with LTE Outline. At the CORE and RAN Level

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Interworking with LTE

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  1. Interworking with LTE Source: Mike Dolan Tony Lee Chair, TSG-SX.5 PDS Chair, TSG-AC.2.2 Alcatel-Lucent VIA Telecom mike.dolan@alcatel-lucent.comaslee@via-telecom.com June 19, cdma2000 Technology Webinar

  2. Interworking with LTEOutline • At the CORE and RAN Level • LTE  eHPRD • How eHRPD connects to the Enhanced Packet Core (EPC) • Handoff • LTE  cdma2000® 1x • CSFB, eCSFB • SMS • At the RADIO Level • LTE  eHPRD • eHPRD  LTE • Circuit Switch Fall Back(CSFB) • Registration • SMS June 19, cdma2000 Technology Webinar Slide 2

  3. LTE  eHPRDHow eHRPD connects to the same Enhanced Packet Core (EPC) HSS/AAA Internet 3GPP2 AAA PCRF PDN Gateway Home Agent MME Serving Gateway Signaling Data eNodeB UE eAN/ePCF AN/PCF HSGW PDSN cdma2000 Technology Webinar

  4. Handoff from LTE to eHRPD HSS/AAA Internet PCRF PDN Gateway MME Serving Gateway HSGW Signaling Data eNodeB eAN/ePCF UE cdma2000 Technology Webinar

  5. Circuit Switched Fall Back (CSFB)Core Network and RAN CSFB involves the delivery of a page for a cdma2000 voice call to a device operating on LTE Uses tunneled signaling to the UE across the S102 interface between the IWS and MME. This supports: CSFB, eCSFB(voice) SMS eCSFB(Enhanced CSFB) is an enhanced form of CSFB that shortens the time to setup the call on cdma2000 1x. cdma2000 Technology Webinar

  6. CSFB Page sent to IWS. IWS sends page to UE via MME and eNodeB using S102. UE moves to 1x. UE sends a normal page response on the 1x access channel. Call proceeds. MSC IWS MME S102 eNodeB 1x BS UE Signaling Data cdma2000 Technology Webinar

  7. SMS MT-SMS SMS are sent via S102 to the UE UE does not leave LTE. MO-SMS SMS are sent via S102 from the UE UE does not leave LTE. Both mobile-originated and mobile-terminated are supported. MSC IWS MME S102 eNodeB 1x BS UE Signaling Data cdma2000 Technology Webinar

  8. Radio Level

  9. LTE to eHRPD protocol architecture HRPD upper layers Signaling Adaptation Protocol HRPD lower layers LTE AS layers cdma2000 Technology Webinar

  10. eHRPD to LTE Two methods available: OtherRATNeighborList Message Broadcasted message Contains E-UTRAN information for AT to search for E-UTRAN system Threshold InterRATRedirect Unicasted message Contains E-UTRAN redirection information cdma2000 Technology Webinar

  11. eHRPD  E-UTRAN inter-RAT redirection cdma2000 Technology Webinar

  12. LTE to 1x tunneling 1x Layer 3 1x lower layers GCSNA LTE AS layers cdma2000 Technology Webinar

  13. 1x to LTE OtherRATNeighborList Message Broadcasted message Contains E-UTRAN information for AT to search for E-UTRAN system Threshold cdma2000 Technology Webinar

  14. Thank You! For more information, please visit http://www.3gpp2.org.

  15. cdma2000® is the trademark for the technical nomenclature for certain specifications and standards of the Organizational Partners (OPs) of 3GPP2. Geographically (and as of the date of publication), cdma2000® is a registered trademark of the Telecommunications Industry Association (TIA-USA) in the United States. cdma2000 Technology Webinar

  16. Additional Information cdma2000 Technology Webinar

  17. Signaling Adaptation Protocol Context cdma2000 Technology Webinar

  18. SAP functionalities Records the current air interface (HRPD or non-HRPD) Provides a virtual connection service between the access terminal and the access network over the S101 tunnel Provides encapsulation of HRPD packets over S101 Triggers idle and active handoffs from LTE to eHRPD It has a control plane as well as a user plane functionality cdma2000 Technology Webinar

  19. Changes to MAC and PHY Layer Initial output power calculation X0 = - Mean RX Power (dBm) + OpenLoopAdjust + PilotInitialAdjustwhere:PilotInitialAdjust = InitialAdjust + min(PilotStrengthCorrectionMax, max(PilotStrengthNominal – PilotStrength, PilotStrengthCorrectionMin)), This is necessary due to lack of access probe power correction. cdma2000 Technology Webinar

  20. Interworking with LTERadio Level LTE  eHPRD non-optimized handoff S-101 interface is not used. Idle handoff from LTE to eHRPD LTE SIB8 provides information on nearby eHRPD cells cdma2000 Technology Webinar

  21. Interworking with LTERadio Level LTE  eHPRD non-optimized handoff S-101 interface is not used. cdma2000 Technology Webinar

  22. LTE  1x Tunnelingon S102 Supports: Circuit Switch Fall Back (CSFB) Enhanced CSFB (eCSFB) SMS, mobile-originated and mobile-terminated cdma2000 Technology Webinar

  23. LTE-eHRPD Protocol Structure cdma2000 Technology Webinar

  24. Air Interface Protocol Enhancements • New protocols to support LTE to eHRPD handover • Default Signaling Adaptation Protocol • Inter-RAT Initialization, Idle State, Route Update, Overhead Message, and Signaling Adaptation Protocols • Support for C.S0024-B • Some existing protocols were also affected. • Documented in C.S0087 cdma2000 Technology Webinar

  25. Changes to theApplication Layer Added alternate packet application subtype for: MFPA -> Alternate MFPA EMFPA -> Alternate EMFPA MLMFPA -> Alternate MLMFPA The alternate packet application subtype is to identify the support of eHRPD cdma2000 Technology Webinar

  26. LTE to 1x tunneling S102 Tunnel cdma2000 Technology Webinar

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