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E1E1--E2 CME2 CMTECHNICALTECHNICAL
For internal circulation of BSNL only
Overview of CDMA 2000 1X & EVDOOverview of CDMA 2000 1X & EVDO
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AGENDA
CDMA Network architecture
Introduction to Network entities
Interfaces & Protocols
For internal circulation of BSNL only
anne ypes unc onsCDMA 2000 1X EVDO
1X & 1X EVDO comparison
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CDMA Network Architecture
MS CA AiBSCBTS Abis
MS
Um
PSTN
PSPDN
Pi
EIR IWFMS C
F LE
For internal circulation of BSNL only
OMC HLR
C
AUC H
Q Q
D VLR
B
VLR
G
SC
N
SCSM ESME M M M
ISDN
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Base Transceiver
Radio transceiving equipment of a certain cell
Radio transmission through air interface betweenBTS and MS
Controlled by BSC
For internal circulation of BSNL only
Communication to BSC through the Abis interface
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Base Station Controller
Radio network management
Radio BTS monitoring and management
Controls handoff
Carries out operation and maintenance of the BSS.
For internal circulation of BSNL only
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Mobile Switching Subsystem
Implements the main switching functions of the
CDMA networkManages the database for user data and mobility.
For internal circulation of BSNL only
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Mobile Switching Center
Controls and implements voice channel connection
for MSs within its coverage areaServing as an interface between CDMA and other
networks.
For internal circulation of BSNL only
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Functions of MSC
Call connection
ChargingAssist radio resource management and mobility
management.
For internal circulation of BSNL only
Implements GMSC function for call routeestablishment to the MS
To query the location information of each MS.
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MSC databases
Visitor Location Register
Home Location RegisterAuthentication Center
For internal circulation of BSNL only
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Visitor Location Register
A dynamic user database
Stores user data of all MSs (visitors) within the MSCs
management range
User ID
MSs location area information
For internal circulation of BSNL only
User statusServices available for the user.
VLR gets and stores all necessary data from the HLR of
a mobile subscriber.
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Home Location Register
A static database
Stores the data for mobile subscriber management
Parameters related with the mobile subscriber
Subscribers ID
For internal circulation of BSNL only
Supplementary services
Current location information of the subscriber for call
route establishment.
ex: Address of MSC or VLR
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Authentication Center
Implements MS authentication
Stores the MS authentication parametersGenerates and sends the corresponding
authentication parameters according to the requests
For internal circulation of BSNL only
of MSC or VLR
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Short Message Center
Responsible for receiving, storing and forwarding
short messagesShort message services include
Point-to-point
For internal circulation of BSNL only
Cell broadcast service.
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OMC
Includes OMC-S and OMC-R
OMC-S is responsible for the maintenance on theMSS side
OMC-R is responsible for the maintenance on the
For internal circulation of BSNL only
BSS side.
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Interfaces and Protocols
Air interface
Um interfaceBetween mobile station and BSS
A interface - Interface between BSS and MSS
For internal circulation of BSNL only
Abis interface -Interface between BSC and BTS
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MSS internal interfaces
MSC
B
HLR/AUC
BSS
D
BSC
VLR
CBTS A
For internal circulation of BSNL only
B
VLR
MSC
MC
E
N
Q
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E interface
Interface controlling different MSCs of adjacent
areas.
Used to exchange handoff information when the MS
moves during a call
For internal circulation of BSNL only
.
standard digital link between MSCs.
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CDMA 2000 1x air interface
Forward Channels
Reverse Channels
For internal circulation of BSNL only
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Forward Channels
Forward pilot channel (F_PICH)
Base station uses this channel to transmit the pilot
signals
Guide the mobile stations to access the network.
For internal circulation of BSNL only
-
System time and frame synchronization
information are sent to MS
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Forward Channels
Forward paging channel (F-PCH)
Paging, command and traffic channel allocation
information
Forward quick paging channel (F-QPCH)
Base station uickl instruct MS about time slot to
For internal circulation of BSNL only
receive the control message on F-PCH or F-
CCCH.
MS need not to monitor F-PCH or F-CCCH time
slot all the time, so it saves much battery.
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Forward Channels
Forward broadcast control channel (F-BCCH)
For delivering system messages.
Common assignment channel (F-CACH)
Base station instructs MS which R-CCCH to use to
For internal circulation of BSNL only
And from which F-CPCCH channel to receive
power control bit.
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Forward Channels
Forward common power control channel (F-CPCCH)
Base station transmits reverse power control bitForward common control channel (F-CCCH)
To exchange control messages
For internal circulation of BSNL only
Used when MS has not set up a traffic channel
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Forward Channels
Forward dedicated control channel (F-DCCH)
Used by base station to transmit messages whenthe mobile station is in traffic channel state
Forward fundamental traffic channel (F-FCH)
For internal circulation of BSNL only
Used to carry signaling, voice, low-rate packet
service, circuit data services or auxiliary service
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Forward Channels
Forward supplemental channel (F-SCH)
Used to carry high-rate packet data service on theforward link when MS enters traffic channel state.
Forward supplemental code channel (F-SCCH)
For internal circulation of BSNL only
Used for data transfer.Forward power control sub-channel (F-PCSCH)
Transmits persistently on the forward traffic
channel.Used for reverse power control.
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Reverse Channels
Reverse pilot channel (R_PICH)
Used to assist the base station to detect the data
transmitted by MS.
Reverse access channel (R-ACH)
-
For internal circulation of BSNL only
channel.
Reverse common control channel (R-CCCH)
Used by base station and MS
To exchange control messages when the mobile
station has not set up a traffic channel yet.
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Reverse Channels
Reverse enhanced access channel (R-EACH)
MS sends control messages to base station whenit has not yet set up a traffic channel
Reverse dedicated control channel (R-DCCH)
For internal circulation of BSNL only
Used to transmit messages when the mobilestation is in traffic channel state
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Reverse Channels
Reverse fundamental channel (R-FCH)
Used to carry signaling, voice, low-rate packet andcircuit data services, or auxiliary services on the
reverse link when the mobile station enters traffic
For internal circulation of BSNL only
channel state.
Reverse supplemental channel (R-SCH)
Used to carry high-rate packet data service
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Reverse Channels
Reverse supplemental code channel (R-SCCH)
Used to send user information to the base stationduring a call.
Reverse power control sub-channel (R-PCSCH)
For internal circulation of BSNL only
Sub-channel of reverse pilot channel
Includes reverse main power control sub-channel
and reverse auxiliary power control sub-channel.
Used for forward power control.
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Forward Channels features
Data rates range from 38.4 Kb/s ~ 3.1 Mb/s.
Transmit full power without any power control.All users belonging to the same service sector share
unique data service channel in the TDMA mode.
For internal circulation of BSNL only
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Reverse Channels features
Data rate can reach at most 307.2 Kb/s.
Soft handoff.
Reverse channels follow Dynamic power control.
Use of Rate control enables reverse link load
For internal circulation of BSNL only
adjustment.
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1 X vs EV DO
1x system
Provides voice services and low/medium-speeddata services
1x EV-DO system
For internal circulation of BSNL only
Provides high-speed packet data services1x EV-DO and 1x systems use different carriers to
transfer data.
1x EV-DO system RF equipment is compatible with1x system.
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1x and 1x EV-DO Comparisons
For internal circulation of BSNL only
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For internal circulation of BSNL only