5 Spirent Ehrpd 9 Handouts

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

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

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)

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

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

Questions?