Alfonso San José

Consulting Systems Engineer, Quantum Policy

April 7th-9th, 2014 - Berlin

Policy Control & Data Pricing Conference

VoLTE – A game changer for Policy

Tony Bobowicz

Regional Sales Manager, Quantum Policy

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Presentation Flow

VoLTE Overview

VoLTE PCRF Challenges

VoLTE PCRF Network Insertion

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VoLTE Benefits for Service Provides

Concept Factor Benefit

Business Critical In 2017 still 50% of SP revenue from Voice

Globally $ 600b

Revenue

Spectrum Efficiency 2x Number of Calls50%-100% Data capacity

increase

CAPEXOPEX

Simplification Data and Voice on same network

50% O&M Cost reduction

CAPEXOPEX

Lower Call setup time CSFB = 5 second delay Quality of Experience

Revenue (OTT threat)

High Quality Voice Better bandwidth useQoS vs Best Effort

Quality of Experience

Revenue (OTT threat)

New Services Voice & Video & Chat integration

Revenue

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EPC

VoLTE APN & BearersGSMA IR.92

IMS

PGW

IMS (SIP) Client

• A dedicated “IMS” APN is used for VoLTE trafficTypically established during initial attach as default APN

• Default bearer for SIP signaling, dedicated bearers established only for the duration of the voice/video call for RTP traffic

PCRF initiated Dedicated Bearers activation based on P-CSCF request for media session

• Voice call can be transferred to CS (SRVCC)

Default bearer, QCI=5 (SIP Signaling)

Dedicated Bearer, QCI=1 (RTP Voice)

PCRF

Dedicated Bearer, QCI=2 (RTP Video)

P-CSCF

AGW

Gx

Rx(SIP)

(RTP)

APN “IMS”

Typical IMS Appl. Servers (AS):- TAS/MMTel Telephony AS (VoIP)- IP SM GW (SMS)- IM-SSF (IN interwork)

AS

S-CSCF

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VoLTE is a Game changer for Policy

PCRF becomes mandatory in a network Dedicated Bearer Establishment / Release Gateway between IMS Core and Packet Core Dedicated Bearer Establishment Allocation Status Network Provided Location Information Charging parameters Emergency Calls Supplementary Services ; Media Flows Add / Delete

VoLTE introduces a set of challenges for PCRF suppliers Scalability Latency Session Correlation Resiliency - Geographic Redundancy

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VoLTE Challenges - Scalability

Requirements for a VoLTE PCRF High Transaction rate capacity Cost effective scalability

Data VoLTE012345678• TPS Comparison

3m subscribersData Services vs VoLTE3x/4x TPS

3x/4x

Key Factors to evaluate Capacity ? Linear scalability ? DRA required to scale ? Redundancy Model ? N+1, 1+1 ? Virtualized ?

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VoLTE Challenges - Latency

Requirements for a VoLTE PCRF Low latency as multiple transactions Low latency even at high TPS rates

VoLTE Data

10 ms

…

10 ms

10 ms

• Latency FiguresData Services vs VoLTE100 ms vs 10 ms

Key Factor to evaluate Latency of PCRF ? DRA required ? Latency introduced by DRA ?

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VoLTE Challenges – Session Correlation

Requirements for a VoLTE PCRF Solution capable of applying

Diameter session correlation

• Diameter Connections

Data PCRF

PCEF

VoLTE PCRF

PCEF AF

Key Factors to evaluate DRA required for Session

Correlation ?

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VoLTE Challenges – Resiliency

Requirements for a VoLTE PCRF Voice calls shall persist in case of site failover Session replication between sites is

mandatory

Data 2G / 3G• High

Availability

Data 4G• High

Availability

VoLTE• Geographic

Redundancy

Key Factors to evaluate Geo Red ? Geo Red model ? HW / SW impact ? Redundancy Model ?

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VoLTE PCRF Network Insertion

Functional separation Data Services provided by Data PCRF (Default APN) VoLTE Service provided by VoLTE PCRF (IMS APN)

Deployment Options Functional separation done by PGW Functional separation done by High Order PCRF

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Functional separation at PGW

3G / 4G

GGSN / PGW

Internet

Diameter Gx (Default APN) Diameter Gx

(IMS APN)

Data ServicesPCRF

PerformanceMmgt

FaultManagement

AF

VoLTE Service PCRF

Diameter Rx

UDR

LDAP SNMP

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Functional separation by High Order PCRF

3G / 4G

GGSN / PGW

Internet

Diameter Gx (Default APN)

Diameter Gx

Data ServicesPCRF

ConfigurationMgmt

PerformanceMmgt

FaultManagement

AF

High Order & VoLTE PCRF

Diameter Rx

UDR

LDAPSOAP / XML SNMP

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Summary

VoLTE is here and it is for good !!!

It is time to re-evaluate Policy Management solutions

Clean separation in Policy for Data and VoLTE Services

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http://www.cisco.com/c/en/us/products/wireless/quantum-policy-suite-mobile/index.html

http://www.cisco.com/c/en/us/solutions/service-provider/mobile-internet/index.html

http://blogs.cisco.com/sp/volte-a-game-changer-for-policy/

For More Information…

Thank you.