cdma2000 Technology Webinar 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 LTE  eHPRD How eHRPD connects to the Enhanced Packet Core (EPC) Handoff LTE  cdma2000® 1x CSFB, eCSFB SMS At the RADIO Level eHPRD  LTE Circuit Switch Fall Back(CSFB) Registration June 19,2013 June 19, cdma2000 Technology Webinar Slide 2

LTE  eHPRD How eHRPD connects to the same Enhanced Packet Core (EPC) PDN Gateway Serving Gateway MME eNodeB HSS/AAA Home Agent Internet HSGW PDSN eAN/ ePCF AN/ PCF PCRF 3GPP2 AAA Signaling Data UE June 19,2013 cdma2000 Technology Webinar

Handoff from LTE to eHRPD HSS/AAA Internet PCRF PDN Gateway MME Serving Gateway HSGW Signaling Data eNodeB eAN/ ePCF UE June 19,2013 cdma2000 Technology Webinar

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. June 19,2013 cdma2000 Technology Webinar

cdma2000 Technology Webinar CSFB MSC IWS MME 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. S102 eNodeB 1x BS UE Signaling Data June 19,2013 cdma2000 Technology Webinar

SMS Both mobile-originated and mobile-terminated are supported. MT-SMS MSC IWS MME S102 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 eNodeB 1x BS UE Signaling Data June 19,2013 cdma2000 Technology Webinar

Radio Level June 19,2013

LTE to eHRPD protocol architecture HRPD upper layers Signaling Adaptation Protocol HRPD lower layers LTE AS layers June 19,2013 cdma2000 Technology Webinar

cdma2000 Technology Webinar 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 InterRAT= Inter Radio Access Technology June 19,2013 cdma2000 Technology Webinar

eHRPD  E-UTRAN inter-RAT redirection June 19,2013 cdma2000 Technology Webinar

LTE to 1x tunneling 1x Layer 3 1x lower layers GCSNA LTE AS layers GCSNA=Generic Circuit Service Notification Application June 19,2013 cdma2000 Technology Webinar

cdma2000 Technology Webinar 1x to LTE OtherRATNeighborList Message Broadcasted message Contains E-UTRAN information for AT to search for E- UTRAN system Threshold June 19,2013 cdma2000 Technology Webinar

For more information, please visit http://www.3gpp2.org. Thank You! For more information, please visit http://www.3gpp2.org. LINKS About 3GPP2 Partners Members Committees Specifications Procedures News/Events Contact us How to join Related Links June 19,2013

cdma2000 Technology Webinar 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. June 19,2013 cdma2000 Technology Webinar

Additional Information cdma2000 Technology Webinar

Signaling Adaptation Protocol Context June 19,2013 cdma2000 Technology Webinar

cdma2000 Technology Webinar 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 June 19,2013 cdma2000 Technology Webinar

Changes to MAC and PHY Layer Initial output power calculation X0 = - Mean RX Power (dBm) + OpenLoopAdjust + PilotInitialAdjust where: PilotInitialAdjust = InitialAdjust + min(PilotStrengthCorrectionMax, max(PilotStrengthNominal – PilotStrength, PilotStrengthCorrectionMin)), This is necessary due to lack of access probe power correction. June 19,2013 cdma2000 Technology Webinar

Interworking with LTE Radio 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 June 19,2013 cdma2000 Technology Webinar

Interworking with LTE Radio Level LTE  eHPRD non-optimized handoff S-101 interface is not used. June 19,2013 cdma2000 Technology Webinar

cdma2000 Technology Webinar LTE  1x Tunneling on S102 Supports: Circuit Switch Fall Back (CSFB) Enhanced CSFB (eCSFB) SMS, mobile-originated and mobile-terminated June 19,2013 cdma2000 Technology Webinar

LTE-eHRPD Protocol Structure Introduce new changes to handle optimized and non-optimezed handoff Optimized handoff: HRPD signaling and data are routed over the LTE protocol stack Advanced HRPD setup can be accomplish Non-optimized handoff No LTE tunneling LTE broadcast some CDMA parameters through SIB-8 Idle handoff from LTE to eHRPD June 19,2013 cdma2000 Technology Webinar 23

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 June 19,2013 cdma2000 Technology Webinar

Changes to the Application 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 June 19,2013 cdma2000 Technology Webinar

cdma2000 Technology Webinar LTE to 1x tunneling S102 Tunnel June 19,2013 cdma2000 Technology Webinar