5 spirent ehrpd 9 handouts
TRANSCRIPT
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eHRPD
Mike Keeley
Market Segment Director
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Agenda
eHRPD… What, Why, and When?
eHRPD’s Impact on the Core Network
eHRPD’s Impact on the Mobile Device
Verifying eHRPD works
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Acronyms
Location Update ProtocolLUP
IP Control Protocol (IPv4 Network Control Protocol)ICPC
HRPD Serving Gateway HSGW
Home AgentHA
Flow Control ProtocolFCP
Foreign AgentFA
Evolved Packet Core System Architecture Evolution (equivalent to SAE)EPC
evolved NodeBeNB
Enhanced Multi-Flow Packet Application (sometimes abbreviated as EMPA)EMFPA
evolved High Rate Packet DataeHRPD
Extensible Authentication Protocol Method for 3rd Generation Authentication and Key Agreement
EAP-AKA
Base Transceiver Station or “base station”BTS
Base Transceiver StationBTS
Base Station ControllerBSC
Access NodeAN
Authentication, Authorization, and Accounting serverAAA
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Acronyms
Vendor-Specific Network ProtocolVSNP
Vendor-Specific Network Control ProtocolVSNCP
Serving GatewaySGW
Serving Gateway SGW
System Architecture Evolution (equivalent to EPC)SAE
Resource reSerVation ProtocolRSVP
Radio Link ProtocolRLP
Radio Access NetworkRAN
Quality of ServiceQoS
Proxy Mobile IP PMIP
Packet Data Network Gateway (interface to other IP networks suchas IMS-based Evolver Packet Core [EPC])
PGW
Packet Data Network GatewayPGW
Packet Data Serving NodePDSN
Packet Data FunctionPDF
Packet Control FunctionPCF
Mobility Management EntityMME
Multi-Flow Packet Application (sometimes abbreviated as MMPA)MFPA
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eHRPD… What, Why, and When?
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What is eHRPD (10,000’ Level)?
An upgrade of existing HRPD (EV-DO) networks to allow EV-DO service providers to introduce SAE/EPC architecture elements to their existing packet core network
Includes both air interface and packet core network changes
eHRPD provides for a high quality of experience for multi-mode UEs
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Why eHRPD (Carriers’ Perspective)?
CDMA/EV-DO carriers transitioning towards LTE don’t want to do massive “forklift upgrades”• Carriers will have to deploy 1X, EV-DO, and LTE all at the same
time
It’s a phased migration• Carriers can upgrade one small piece at a time without
interruptions
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Why eHRPD (Consumers’ Perspective)?
Subscribers are used to seamless mobility• Provides an evolutionary path from EV-DO networks to LTE
networks
• Allows seamless services, including handovers, between eHRPD and LTE networks
• One IP address no matter where the user roams, and no matter what network it’s on.
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When Will eHRPD Be Here?
’’0808 ’’0909 ’’1010 ’’1111 ’’1212 ’’1313 ’’1414 ’’1515
2015:Full-scale global deployment
2008:Standards converging on completion
2009:Advanced trials & test of pre-commercial devices
2010:Initial deployments of data only devices
2011:First “handset-like”devices
LTE Deployment Timetable
2010:eHRPD deployment
2010:eHRPD deployment
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eHRPD’s Impact on the Core Network
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3GPP2 technology networks
HA
PDSN/FA
BSC/PDF
BTS BTS
AN/PCF
BTS
1X EV-DO
Home Agent• IP service anchor
Packet Data Serving Node• For EV-DO, the PDSN is configured to be
the Foreign Agent (FA)
1X - Base-Station Controller/ Packet Data Function
EV-DO - Access Node/Packet Control Function
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LTE networks
SGW
MME
eNB eNB
PGW
Serving Gateway • InterRAT anchor
• Mobility anchor
Packet Data Network Gateway• IP policy enforcement on packet flows
to and from mobile devices
Mobility Management Entity –• Paging & Authentication
• Signaling Control
• Tracking
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eHRPD – The “glue” between the two
HSGW
RNC
BTS BTS
PGWPacket Data Network Gateway• IP policy enforcement on packet flows
to and from mobile devices
HRPD Serving Gateway • Converges mobility functions between
LTE and CDMA/EV-DO
eHRPD Radio Network Controller
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RAN Block Diagram
HSGW
eRNC
eBTS eBTS
PGWHA
PDSN/FA
BSC/PDF
BTS BTS
AN/PCF
BTS
1X EV-DO
SGW
MME
eNB eNB
PGW
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Co-location
HSGW
eRNC
eBTS eBTS
PGWHA
PDSN
BSC/PDF
BTS BTS
AN/PCF
BTS
SGW
MME
eNB eNB
PGW
PDSN/FA/ HSGW/ SGW
HA/PGW
AAA/HSS
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PDSN/FA/ HSGW/ SGW
HA/PGW
Interfaces
eRNC
eBTS eBTS
BSC/PDF
BTS BTS
AN/PCF
BTS
MME
NB NB
AAA/HSSS103S103
S11S11
S2aS2a
S1-MMES1-MME
S101S101
S1-MMES1-MME
A10/A11
A10/A11
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Interfaces
PDSN/FA PCFA10/A11
MME PCFS101
MME eNBS1-MME
PDSN/FA SGWS103
MME SGWS11
PDSN/FA PGW S2a
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Implementation On the Network:
New Service Options• SO59 – HRPD connection to a Packet Data Network
• SO67 (possible future implementation) – QoS Bearer Service Option
IPv6• Always on; IPv4 on demand
Vendor-Specific Network Protocol (VSNP)• uses VSNCP (Vendor-Specific Network Control
Protocol)
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eHRPD’s Impact on the Mobile Device
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Implementation On Devices and the RAN
On Devices and the RAN• Enhanced Multi-Flow Packet Application (EMFPA)
Implemented as changes in RLP, LUP and FCP
• VSNCP – Vendor Specific Network Control Protocol
In lieu of IPCP, which EV-DO uses to connect to the PDSN, here we use VSNCP to connect to the PDN Gateway
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Implementation On Devices and the RAN
On Devices and the RAN• VSNP – Vendor Specific Network Protocol
carries RSVP (Resource reservation Protocol) payload for QoS enforcement
• PMIP – Proxy Mobile IP
Replaces MIP stack on the device
• IP-based QoS bearer instead of PPP-based bearer
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Implementation - Authorization
New Authorization routine consistent with 3GPP standards:• EAP-AKA : Extensible Authentication Protocol
Method for 3rd Generation Authentication and Key Agreement
• EAP-AKA’ : The apostrophe indicates that this is Improved EAP-AKA – Binds network name information to the key
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Verifying that eHRPD works
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eHRPD-specific TestingConformance Tests• Session Negotiation Tests
With eHRPD, HRPD
With (and between) different application subtypes (MFPA, EMPFA, etc.)
• Session Configuration Tests for Dormant Handoff between eHRPD and HRPD
With ProtocolID renegotiated at Connection Request & on access
with eHRPD HRPD personality switch
• CDMA2000 1X and eHRPD Mobility
System Reselection, active & dormant
• Dormant eHRPD to Idle E-UTRAN (and vice versa) Handoffs
With & without A13 session information transfers
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eHRPD-specific TestingConformance Tests (continued)• PPP Based Main-Service Connection Establishment
Session establishment and authentication
• IP Address Assignment and PDN Attach and Detach Procedures
Includes Vendor Specific Network Control Protocol (VSNCP)
Interoperability Tests• SMS origination and termination during active eHRPD session
• SMS origination and termination during dormant eHRPD session
• Voice call origination and termination during active eHRPD session
• Voice call origination and termination during dormant eHRPD session
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Adversarial Testing (examples)• HSGW unavailable
• IP address pool depletion
• PDSN/FA errors – no response
eHRPD-specific Adversarial Testing
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Questions?