Wireless Data Services In Cdma2000

1
Wireless Data Services In Cdma2000

• By
• Mohammed Yousuf Shareef St Id220326

2
Introduction

• Cdma-Code Division Multiple Access.
• Spread Spectrum technique using Direct Sequence
  i.e. each data bit is represented (spread) by
  multiple bits in transmitted signal.
• Cdma2000-multi carrier mode Cdma
• It supports data rates both circuit and packet
  switched of 9.6kbps to 2 Mbps.
• Operates in wide range of environments
• Outdoor Mega cells(cells 35km radius)
• Outdoor macro cells(1-35 km radius)
• Indoor/outdoor micro cells(1km radius)
• Indoor/outdoor Pico cells(lt50-m radius)

3
Contd

• Cdma2000 can be deployed in
• Indoor/Outdoor environment
• Wireless Local Loops
• Vehicular Environments
• Mixed Vehicular Indoor/Outdoor Environments
• Cdma2000 services support
• Overlay configuration
• Backward compatibility to TIA/EIA-95B signaling
  network
• Graceful gradual upgrade from 2G to 3 G systems
• Common channels with an underlay TIA/EIA-95B
  system during transition periods

4
Contd

• CDMA 2000 is a radio and network access system
  that is part of the IMT-2000 (ITU) specification
  suite of 3G systems.
• Goals of IMT-2000Global Standard.
• High Speed Packet Data Services
• 2Mbps for stationary use.
• 384kbps for pedestrian use.
• 144kbps for vehicular use.
• 3G applications enabled by CDMA 2000
• Packet based services like, wireless Internet,
  e-mail, ecommerce
• and multimedia, location based services,
• longer battery life.

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Evolution Of Wireless Technologies

• 1G
• Analog based cellular technology
• Services
• Voice
• 2G
• Digital technologies
• Services
• Voice
• Low rate data
• 3G
• Services
• Voice
• High Speed Data

• Wireless Technologies

1St Gen
2G
3G
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Evolution Of Wireless Technologies

• CDMA 2000 enables migration from and seamless
  backward compatibility to
• cdmaOne 2G to 3G without fork-lifting the legacy
  system.
• CDMA 2000 migration path
• CDMA 2000-1X (1xRTT)
• Currently available. Incorrectly considered 2.5G.
• First version of CDMA 2000 by Qualcomm.
• 144kbps data rate and 1.5 times the voice
  capacity.
• 1xEV-DO (HDR)
• Evolution of 1x to provide high data rate only,
  over a separate carrier.
• 2.4Mbps downstream and 300kbps upstream.

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Evolution Of Wireless Technologies

• 1xEV-DV
• Evolution of 1x to provide high data rate and
  voice capacity.
• 5.2Mbps.
• CDMA 2000-3X (3xRTT)
• Conceptual phase.
• Use of a new 3.75MHz (3 x1.25MHz) spectrum.

8
CDMA Advantage

• GSM is discrete with no forward and backward
  compatibility
• CDMA terminals are fully forward and backward
  compatible.

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Approximate Download time for 3 minute mp3

•  
• Network Max.Data Rate Download time
• GSM 9.6Kbps 41 minutes
• IS95-A CDMA 14.4Kbps 31 minutes
• GPRS 45Kbps 9 minutes
• IS95-B CDMA 64Kbps 6 minutes
• CDMA 2000-1X 307Kbps 1.5 minutes
• WCDMA 384Kbps 61 seconds
• CDMA2000 1XEV-DO 2.4Mbps 11 seconds

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CDMA 2000 Forward Link
11
CDMA 2000 Forward Link

• Spreading Rates
• SR1 (1.2288Mcps) and SR3 (3xRTT).
• Nine forward link radio configurations
• RC1 - RC9.
• Each RC is characterized by physical layer
  parameters such as different modulation and
  coding.
• RC Max. Data Rate Code Rate SR
• 1 9.6kbps 1/2 SR1
• 2 14.4kbps 1/2 SR1
• 3 153.6kbps 1/4 SR1
• 6 307.2kbps 1/6 SR1
• 9 1.036Mbps 1/3 SR1

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CDMA 2000 Forward Link

• New Common Channels
• 7 Forward Common Control Channels (F-CCCH)
• Signaling and MAC messages.
• 8 Forward Broadcast Control Channels (F-BCCH)
• Paging messages.
• - Specifically for CDMA2000 mobiles to reduce
  load on
• cdmaOne channels.
• Forward Common Auxiliary Pilot Channel (F-CAICH)
• Used to generate spot beams in a particular area
  (hot spot).
• 3 Forward Quick Paging Channels (F-QPCH)
• Indicator to the mobile to wake up for a message
  on the paging
• channel. Useful for conserving battery
  during idle time.
• 4 Forward Common Power Control Channels (F-CPCCH)
• Used to control the reverse access channels.

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CDMA 2000 Forward Link

• Dedicated Channels
• cdmaOne Forward Fundamental Channel (F-FCH)
• Primarily for voice, but may carry data up to
  14.4kbps.
• IS-95B (2.5G) Up to 7 Forward Supplemental Code
  Channels (F-SCCH) per user
• Strictly for data traffic supporting either RC1
  or RC2.
• Multiple channel aggregation 9.6 - 115.2kbps.
• New Dedicated Channels
• Forward Dedicated Common Control Channel (F-DCCH)
• High-priority data traffic, such as data
  re-transmissions.
• Up to 2 Forward Supplemental Channels (F-SCH) per
  user
• Also only for data, but supports RC3 through RC9.

14
CDMA 2000 Reverse Link
15
CDMA 2000 Reverse Link

• New Common Channels
• Reverse Enhanced Access Channel (REACH).
• Reverse Common Control Channel (RCCCH).
• Used to provide more reliable and
• power efficient access.
• Dedicated Channels
• cdmaOne Reverse Fundamental Channel (R-FCH).
• IS-95B (2.5G) Up to 7 Reverse Supplemental Code
  Channels (R-SCCH)
• per user.
• New Dedicated Channels
• Reverse Dedicated Control Channel (R-DCCH).
• Up to 2 Reverse Supplemental Channels (R-SCH) per
  user.
• Reverse Pilot Channel (R-PICH)
• Improves reception at the receiver.
• Power control bits multiplexed (at 800Hz) for
  forward link power
• control.

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Packet Data Call
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Packet Data Call

• a)In Origination Message, MN requests packet data
• service (can also request supplementary services
  like
• fax over circuit.)
• b) BSC acknowledges.
• c) BSC sends Service Request message to MSC.
• d) After authentication, MSC sends channel
  Assignment Request message.
• e) Forward and Reverse channel assignment
  procedures
• (same as (e) thru (j)).
• f) A9-Setup-A8 message to PCF to establish A8
• connection.
• g) Procedure for establishing A10/A11 connection
  between
• PCF and PDSN (R-P interface).
• h) PCF transmits A9-Connect-A8 message to BSC.
• i) BSC transmits Assignment Complete message to
  MSC.
• j) PPP connection establishment procedure and
  Mobile IP
• registration procedure initiated.

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3G Network Architecture
19
Contd

• IP Mobility
• Ability to move with an IP address while the
  connection using the IP address is active
• IP Mobility may be provided by a combination of
  RAN mobility and CN mobility
• Radio Access Network IP mobility
• Handoff/handover
• Cell selection/reselection
• Core Network IP mobility
• Mobile IP, GPRS

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Cdma2000 Network Architecture

• AAA Authentication, Authorization and Accounting
• FA Foreign Agent
• GR Gateway Router
• HA Home Agent
• PDSN Packet Data Serving Node

21
Cdma2000 packet Data Network Architecture
22
Cdma2000 Layering Structure

• Upper Layer Services
• Voice
• End User data bearing services
• Signaling
• Lower Layer
• Link Access Control(LAC)
• Media Access Control(MAC)

23
Contd

• LAC manages point to point communication
  channels
• MAC provides 3 functions
• Media Access control state
• Best Effort Delivery
• Multiplexing QOS control

24
Cdma2000 Layer Structure

• Layer functions
• Signaling Control
• Data Services
• Voice Services
• Mac Control states
• Qos
• Resource Allocation
• Multiplexing
• Coding Modulation

25
Packet Data Mac Operation States in Cdma2000
TIA/EIA-95B
26
Contd

• Active State
• Traffic,PC and control channels assigned
• Control Hold State
• PC and Control channels assigned
• Very fast traffic channel reassignment
• Suspended State
• No Dedicated Channels
• Fast traffic Channel
• Reassignment
• RLP state may be maintained
• PPP state maintained
• Slotted sub mode

27
Contd

• Dormant State
• No dedicated channels
• No BS,MSC resources
• PPP state maintained
• Short data bursts

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Channel Bandwidths and Data rates supported by
Cdma2000
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Services Of CDMA2000 Networks

• Short Message Services (SMS)
• low cost/high value services
• increased network traffic
• higher profits and greater customer loyalty
• Message Over IP-SMS
• Over-the-Air Services
• E-Mail Distribution
• Unified Messaging
• The end-user can send, retrieve and manage
  e-mail, voice mail and fax mail with one
  subscription, to one service, provided by one
  operator.
•  

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AAA Services cdma2000 networks

• AAA Services of Cdma2000 Networks
• Migrate from a one size fits all model to
  personalized services
• Package premium services for both residential and
  corporate users
• Collect detailed usage information for flexible
  billing options
• Track resource usage in real time for guaranteed
  access and access control.
• AAA consists of three key functions
• Authentication recognize the user
• Authorization enforce access controls and
  deliver services
• Accounting track users usage of
  network resources

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Vendors Of Cdma2000

• cdma2000 (3GPP2)
• Vendors
• Qualcomm
• Lucent
• Nortel
• Motorola
• Samsung, Ericsson,
• Operators
• Sprint PCS
• Verizon , KDDI, SKT

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Conclusion

• A brief overview of wireless data services has
  been presented
• New Channels Of Forward and Reverse channel
  specifications of cdma2000 is shown.
• Network Architecture Of Cdma2000 has presented
• Various wireless data services like
• SMS
• Unified Messaging
• AAA Services of cdma2000 networks

33
References

• Wireless Network evolution by Vijay K.Garg.
• cdma2000A Third generation radio transmission
  technology,Bell Labs technical Journal
  ,sept.1998.
• TIA/EIA IS-2000-3 Medium Access Control Standard
  for cdma2000 Spread Spectrum Systems,Nov.1999.
• Douglas N.Kinsley, Sarath Kumar, Subhasis Laha,
  and Sanjiv Nanda,Evolution Of Wireless Data
  Services IS-95 to cdma2000
• Technology Primer AAA Services for Cdma2000
  Networks, Bridge Water Systems