Wireless Evolution in Core

1
Wireless Evolution in Core Radio

• Mika Ahlholm, Hanoi, December 2005

2
Outline

• Major Trends in Voice Evolution
• Evolution Towards VoIP
• What Is NGN in Mobile Networks?
• IMS and Fixed-Mobile Convergence
• Targeting the All-IP Network
• Radio Access Technology Evolution
• HSDPA, WLAN, WiMAX
• Beyond 3G 3Gplus, OFDM
• Presented by Mika Ahlholm
• Manager, Technical Sales
• Mobile Networks Center of Competence, Bangkok

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Major Trends Shift of Voice Traffic (Minutes of
Use)
Mobile Voice (CS)
PSTN
Mobile Data (PS)
Cellular Radio
Fixed DSL
WLAN/ WIMAX
4
Outlook of Mobile Network Architecture Today
Charging
IMS
SIP Services
Applications
Common Database
Internet
HLR
Mobile Voice (CS)
PDF/CRF
MGCF
HSS
IP backbone
PSTN
Mobile Data (PS)
MGW
MSC-S
RAN
MGW
FixedDSL
WLAN/WIMAX
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Major Trends Voice Evolution

• CS domain remains predominant for mobile voice
  well into the next decade
• Operators key differentiators are cost position
  and voice quality
• IMS becomes uniform service control for all types
  of traffic in long-term
• Introduction is driven by new multimedia services
• IMS is multimedia soft switch
• IMS will be used for voice applications (e.g. PoC
  or rich voice)
• Migration to SIP controlled voice via IMS will
  start with wire line and alternate accesses (e.g.
  WLAN)
• In the long run SIP controlled voice via IMS will
  replace the CS voice

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What Is NGN in Mobile Networks?

• NGN blends the public switched telephone network
  (PSTN) and the public switched data network
  (PSDN)
• Creates a single multi-service network
• Not based on large, centralized, proprietary
  switch infrastructures
• Results in a distributed network infrastructure
• Leverages new, open technologies to reduce the
  cost of market entry
• Increase flexibility
• Accommodate both circuit-switched voice and
  packet-switched data
• Soft-switching technology

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Softswitch Network Architecture
Services
Services
Services
SIP, XML, Parlay
Softswitch
SIP, ISUP, H.323
MGCP, SIP
MGW
RAS
IAD
RAS Remote Access Server IAD Integrated Access
Device
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Advantages of Softswitching www.softswitch.org
Soft-Switched
Circuit-Switched

• Solutions come from a single vendor that supplied
  everything in one proprietary box software,
  hardware and applications
• Customers were locked-in to their vendor no
  room for innovation, expensive to implement and
  maintain

• Solutions can come from multiple vendors, at all
  levels who supply open standards-based products
• Customers are free to choose best-in-class
  products to build their network. Open standards
  enable innovation and reduce costs

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NGN in Mobile Networks

• For CS domain NGN R4
• R4 specifies the separated architecture (MSC-S
  and MGW)
• For CS domain FMC R5/R6
• Introduction of MGCF in the MSC/MSC-S
• IMS is NGN
• IMS is the control layer (CSCF, HSS)
• Open interfaces (e.g. SIP)
• 3GPP R5
• Various access methods
• GERAN, UTRAN, WLAN, DSL

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Fixed-Mobile Convergence Standardization
TISPAN Telecommunications and Internet converged
Services and Protocols for Advanced Networking
Mobile
Fixed
ETSI IETF
3GPP
IMS
SIP
SIP
Rel 5. 2003
IMS
SIP
May 2005
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The Position and Role of IMS
Content Applications
Access
Network Infrastructure
IP-based Multimedia Subsystem
IMS
IMS
Control
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New Technologies Innovation in Core Network

Policy Based Multi-Service Networking

• Central policy directories
• E2E policy enforcement
• Policy brokerage
• Flexible service definition

Network consolidation on IP and standard
components. New technologies enable service
centric operation.
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Radio Access Technology Evolution

• Mika Ahlholm, Hanoi, December 2005

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RAN Evolution Speeds Beyond Current Limits
Performance
4G
Broadband
Limit 5
(OFDM)
gt 20 MHz
WiMAX,3Gplus
Limit 4
20 MHz
WiMAXMulti Carrier- OFDM
Wideband
Limit 3
(W-CDMA)
5 MHz
HSDPA
Flash-OFDM(CDMA)
Limit 2
1,25 MHz
1xEV-DVFlash-OFDM
Rel. 99
Narrowband
Limit 1
1xEV-DO
(TDMA)
200 kHz
EDGE
GPRS
1xRTT
IS-95
GSM
(first release)
1990
2000
2005
2010
1995
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Performance of Fixed-line vs. Mobile Technologies
Bandwidth (bit/s)peak user data rates
10G
Fixed Access
FTTH 155 Mbit/s
1G
4G 1 Gbit/s
Cable 40-50 Mbit/s
100M
3Gplus 100 Mbit/s
VDSL 50 Mbit/s
10M
HSDPA 10 Mbit/s
ADSL 3-8 Mbit/s
ISDN-BRI 2X6416 kbit/s
Mobile Access
1M
WCDMA 2 Mbit/s

EDGE 220-384 kbit/s
GPRS 40-75 kbit/s
GSM 9,6 kbit/s
100k
1990
1995
2000
2005
2010
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Complementary Radio Access Technologies
Capacity, Coverage and Cost
degree of mobility
mobile driving,
W-CDMA
CDMA
GSMGPRS
mobile portable/ walking
3Gplus
HSDPA
EV-DO EV-DV
EDGE
IEEE802.16e
FlashOFDM (802.20)
4G
WiMAX
DECT
WLAN(IEEE 802.11x)
stationary nomadic
IEEE802.16a,d
BlueTooth
Ethernet (Twisted Pair)
Ethernet (Fiber)
Mb/s
10
1
100
0.1
103
104
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3G plus Key Enhancements Performance Aspects
High Maximum Data Rate High data rates in difficult radio environments (e.g. severe time dispersion) High data rates at high terminal speed High data rates with wide-area coverage (with reasonable output power) High peak downlink air interface rate (100 Mbps with 20 MHz spectrum)
Low Round Trip Delay RAN latency 10 ms PS core latency lt 10 ms
High System Capacity Improved spectral efficiency Mbps per MHz per cell Advanced antenna solutions Efficient operation with small cells
Flexible Spectrum Management Very large maximum transmission bandwidth Multiple frequency bands
Designed for IP traffic Efficient support of the various types of services, especially from the PS domain (e.g. Voice over IP, Presence)
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Key Technologies for Systems Beyond 3G

OFDM Orthogonal Frequency Division Multiplexing

• Increased spectrum capacity through scalable data
  rates
• Low complexity
• Efficient broadband data transmission

Data Rates of 1 Gbps are achieved Existing
commercial HW can cope with the technical
complexity Air interface will cease to be the
performance bottleneck
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Conclusion Network Architecture in 2012
Legacy CS domain
Service Delivery Framework
User Profiles
GERAN
Common Data Repository
UTRAN
Policy Directory
Common Session Control
IMS
CPS
eNode B
UTRAN-Evolution (3GPlus)
PSTN PLMN
Broadband Wireless Access
other PLMN
Unified IP Multimedia Network
WiMAX BS
4G / Multi-Hop
Internet Intranet
xDSL
eGSN enhanced GPRS Support Node PLMN - Public
Land Mobile Network PSTN - Public Switched
Telephony Network
CS Circuit Switched IMS IP based Multimedia
Subsystem MGW Media Gateway
AP Access Point BS Base Station CPS Control
Plane Server
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Thank You for Your Attention!
Mika Ahlholm mika.ahlholm_at_siemens.com 66 2 715
4207