2008-5-2
Challenges and Opportunities with CDMA/LTE Interworking 2008.4 www.huawei.com
HUAWEI TECHNOLOGIES CO., LTD.
CONTENTS • Opportunities for CDMA operators • Smooth Evolution Solutions • Huawei Overview
LTE Vision z
z
z
Business drivers
Global economies of scale
Broad contributions across the industry
International roaming for today’s global business partnerships
Technical drivers
Achievable peak rates up to 278 Mbps in 20 MHz and 4x4 MIMO
Much reduced latency capable of supporting commercial VoIP services
Interworking with 1xRTT and HRPD networks for a smooth migration to LTE
Timeline
First clean version of LTE specification is available from Dec. 2007, and will be stable in Dec. 2008
Prototype live demo available today from most tier 1 vendors EV-DO Rev.0 DL:2.4Mbps UL:153.6kbps In 1.25MHz
2002
EV-DO Rev.A DL:3.1Mbps UL:1.8Mbps In 1.25MHz
2006
2008/2009 LTE Trial
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2010 LTE Commercial
Page 3
2011…
Key Technologies of LTE Benefit:
Physical spectrum efficiency Improvement (OFDMA/SC-FDMA/MIMO/Time and space scheduler/Interference mitigation)
¾
DL: 3~4×R6 HSDPA average
¾
UL: 2~3×R6 HSUPA average
¾
DL: 141Mbps peak (2*2 MIMO)
¾
UL: 50Mbps peak (1*2MIMO)
Benefit:
Efficient usage of PHY layer (Always on /short TTI/Efficient MAC Mapping/E-MBMS)
Networking (Scalable bandwidth/All-IP
Lower data plan latency
¾
Lower idle->active latency
¾
Higher APP throughput
¾
E-MBMS comparable to DVB-H
Benefit: ¾
Lower CAPEX/OPEX
¾
Explore spectrum (including refarming) efficiently
/Flat architecture/SON) ¾
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¾
Enable more business models
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CDG Believes LTE will Co-exist with CDMA z
“One technology fits all” approach to meeting today’s telecommunications requirements will not hold true in the next generation of mobile broadband solutions. Rather, operators will match particular applications and services to the technologies that best suit them.
z
3G CDMA will remain the leading and most economical platform to deliver core mobile broadband services, and operators will use OFDM-based systems such as LTE etc. to complement those services with additional features and broadband capacity. — The CDMA Development Group (CDG) CTIA WIRELESS 2008—LAS VEGAS—March 31, 2008
“Verizon Selects LTE as 4G Wireless Broadband Direction” — Verizon.com – Nov. 29th 2007
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Page 5
Requirements to Achieve a Smooth Migration to LTE 9 Flexible spectrum re-farming options
HA HA PDSN PDSN BSC/RNC BSC/RNC
BSC/RNC BSC/RNC
9 Broad portfolio to address a wide range of deployment scenarios leveraging multimode equipment on the ground 9 Quality of Experience across access networks through seamless interworking
AGW AGW
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9 Smooth network migration to the new architecture leveraging common platforms and open interfaces
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Typical Spectrum Usage for LTE Introduction CDMA
… 800M/1900M Frequency band LTE(10M)
CDMA
… 800M/1900M LTE(5M)
AWS (LTE) 700M/AWS
CDMA
LTE(10M)
CDMA 1900M
LTE 1900M
CDMA 800M
LTE 800M Year
… 800M/1900M
LTE 700 700M/AWS
2008 CDMA
2009
2010
LTE launch
2020 All LTE
Carrier Bandwidth Scalability and Multimode BTS are Critical
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Potential LTE Roll Out Strategies Hot spot /Dense Urban
CDMA
Urban /Sub Urban
CDMA
CDMA
Rural0
CDMA
CDMA
CDMA
CDMA
LTE
LTE
LTE
LTE
LTE
LTE
Micro
Hotspot Coverage: broadband access, web surfing, nomadic
LTE
Micro
Services
Micro
Femto
Femto
Femto
Femto
Femto
Femto
CDMA
CDMA LTE
Macro Coverage: Mobile Broadband, Real-time services, VoIP
Convergence & fixed broadband services
Femto
Broad and Flexible LTE/SAE Portfolio is a Must Have! HUAWEI TECHNOLOGIES CO., LTD.
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LTE/EPC Interworking with 1xEV-DO Rev-A Network – Common Platform and Open Interfaces Allows for Scalability and Flexibility HSS
SWx
LTE/ EPC MME
PCRF
S6a
Operators’ IP Services / Internet
Rx+ S1-MME ----
S7c ----
---- S11 S-GW
EUTRAN Network
S7 ---SGi
P-GW S5
S1-U S101 ----
S2a ----
S6c
---- S7a
STa ----
S103 ----
Rev-A BTS Network
3GPP AAA Server
HA Diameter AAA
HSGW
MIPv4 --A s AA u i d Ra
--- A10’ A11’
3GPP2 AAA Server
PDSN
1xEV-DO Network
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e AN/PCF
A12 AN-AAA
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Two Interworking Options z
z
Non-optimized inter-working between SAE and HRPD
Longer service interruption time with little impact on HRPD network
Suitable for Best effort service in the initial stage
Optimized interworking between EPS and 1xEV-DO
Minimize the total service interruption time experienced at the UE leaving the source access system
source access system
Data Transfer in target access system target access system attach and perform service activation (in the case of E-UTRAN) OR perform a session configuration or traffic allocation request (HRPD) HUAWEI TECHNOLOGIES CO., LTD.
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High-Level Functionalities for Ev-DO/LTE Optimized Interworking z
BTS & eNodeB – System Information Broadcast, Measurement Control, HO control, Tunneling procedures over the air & over core network interfaces, data forwarding procedure
z
RNC & MME –Tunneling procedures to/from the base stations, S101 interface and data forwarding bearer establishment
z
HRGW & Serving GW – Establish bearers for data forwarding procedures over S103 interface
z
PDN GW – Implementation of the data plane anchoring function for CDMA traffic and the S2a interface
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Seamless Voice Interworking Between LTE/1X
• • • •
Adopt 3GPP2 IMS VCC to anchor all voice call The IWS function to reside in the 1X MSC S102 extends the tunneling of 1X messages from the MME to IWS 1X call establishment messages is tunneled over the air and S1-MME
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Huawei Overview z
Partnership
z
z
Innovation
Dedication
z z
z z
Focus on Innovation, Dedication, Customization and Cost Experience, Stability, and Support of a Tier-1 Vendor with 70k employees Fastest Growing Vendor with End-to-End Portfolio
TCO Savings through Technology Innovation Common Platform across multiple Products
32k+ R&D engineers Customized R&D for Customers
$16B contract sales in 2007 HUAWEI TECHNOLOGIES CO., LTD.
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Key Take-Away
z
LTE offers real business benefits, high value technical improvements and early availability for CDMA operators.
z
Flexible broad multimode portfolio and seamless interoperability are the key factors as CDMA and LTE might co-exist for a long time
z
Huawei is a leading player in LTE
HUAWEI TECHNOLOGIES CO., LTD.
Page 14
Thank you www.huawei.com
Copyright©2008 Huawei Technologies Co., Ltd. All Rights Reserved. The information contained in this document is for reference purpose only, and is subject to change or withdrawal according to specific customer requirements and conditions.
