Read CDMA Migration to LTE text version

Migration to LTE:

Infrastructure Impact

Maria E. Palamara Director ­ CDMA-LTE Strategy Alcatel-Lucent January, 2009

LTE to eHRPD/HRPD Interworking

eHRPD

Internet Intranet

PDN GW

IMS

AT: Access Terminal eRNC: Enhanced RNC HA: Home Agent HRPD: High Rate Packet Data HSGW: HRPD Serving Gateway LTE: Long Term Evolution MME: Mobility Management Entity PDN GW: Packet Data Network Gateway PDSN: Packet Data Serving Node RNC: Radio Network Controller SGW: Serving Gateway

LTE/ 3GPP

S11

HA

S2a S103

S5/S8

HRPD/ 3GPP2

SGW

HSGW

A10/A11+

PDSN

A10/A11

MME

S1-U S1-MME eNodeB

S101

eRNC

RNC

eBTS LTE-DO AT eHRPD AT

BTS

Legacy DO AT

ALU is pioneering cost-effective multimode solutions for HRPD/LTE in standards and network and handset product solutions

2 Challenges of LTE Migration| January 2009 All Rights Reserved © Alcatel-Lucent 2009

Key Questions to Consider for LTE enhanced Packet Core Deployments

Network Topology:

What applications will be used with LTE?

High speed data? Video services? Mobile to mobile applications? Voice telephony? Fixed wireless & fixed/mobile convergence?

What are projected traffic models? Design topology for voice, best-effort data, mobile peer-to-peer applications? What are geographic redundancy & load sharing plans?

Reuse of Existing Packet Core Equipment vs. New:

Consider how old is existing equipment ­ is it up for the task?

Consider extra traffic demands LTE will put on it Playing a part in the open application value chain: Importance of DPI & policy management

Consider benefits of integration with backhaul concentration routers?

Integrated E2E IP QoS management

Consider the network topology ­ same as before, or more distributed? Co-location of functions in a single platform? Application optimization schemes (e.g. leveraging multiple PDN capability)?

3 Challenges of LTE Migration| January 2009 All Rights Reserved © Alcatel-Lucent 2009

Radical changes or evolution?

Existing paradigm (3G)

Voice Broadband services Network data delivery to terminals Multisession data

Circuit switched Today: Best effort (WAP, SMS), Limited expensive "broadband" Possible in theory via GPRS; Mostly blocked by the operators "Wait until you finish with mini-web browsing or the long conference call, so you can get your push-emails" No e2e QoS ­ only CoS! In theory: up to 8 CoS In practice: 2-4 (voice/control, best-effort data) Theory: PCRF introduced in 3GPP R7 Practice: RADIUS authentication Part of RAN; Mobility hidden from core network

How long?

20 years

LTE

- no Circuit Switched core - all voice is VoIP Real-time, interactive, low latency, true broadband QoE Possible and probable: fully managed and charged by PCRF; network protection by DPI (optional) All about bearers, sessions, flows: - user-initiated - network-initiated 9 QoS, strictly defined parameters, e2e QCI, SDF, bearers... (3GPP TS 23.207) True network-wide policy control and management (PCRF, PCEF) - no RNCs (radio mgt. by eNB) - mobility visible and moved to core (managed from the core network)

R/E?

R R R R R R R-E

10 years

since SMS

n/a

QoS

Since R4

Policy Management Mobility Management

Since R4

From beginning

4 Challenges of LTECore | Q1 2009 | Evolved Packet Migration| January 2009

All Rights Reserved © Alcatel-Lucent 2009

Key implications on user plane and control plane

User plane has many common attributes with fixed broadband Broadband capacity QoS for multi-service delivery Per-user and per-application policies Highly available network elements Control plane gets new mobile-specific attributes Mobility across networks and operators Distributed mobility management Massive increase in scalability Dynamic policy management

BSC

SGSN/GGSN

RNC

SGSN/GGSN

RNC

PDSN

GSM/GPRS/EDGE

WCDMA/HSPA

CDMA/EV-DO

LTE

Service Delivery Platforms

IP channel SGW eNode B

MME PCRF

Evolved Packet Core

PDN GW

5 | SC120 - EPC:LTE Migration| JanuaryNetworks | 2009 Sales Meeting Challenges of The Role of IP in LTE 2009

All Rights Reserved © Alcatel-Lucent 2009

Leverage Transport layer Convergence for Seamless Evolution End-to-End IP nature of LTE facilitates convergence of Mobile-Transport layers to optimize performance

Seamless convergence of backhaul/backbone networks for 2G/3G/LTE Deliver sophisticated consistent end-to-end IP QoS across mobile & transport layers Lower Total Cost of Ownership (TCO) via flexible alignment of mobility (EPC) functions with transport, backhaul and aggregation

EPC

6 Challenges of LTE Migration| January 2009

All Rights Reserved © Alcatel-Lucent 2009

www.alcatel-lucent.com www.alcatel-lucent.com

7 Challenges of LTE Migration| January 2009

All Rights Reserved © Alcatel-Lucent 2009

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CDMA Migration to LTE

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