wireless communication cdma evdo systems
DESCRIPTION
Wireless Communication CDMA EVDO Systems. Dr. Mustafa Shakir. Contents. CDMA 1X Packet Data Service Functional Entities 1X Packet Data Service Status CDMA Evolution EV-DO Network Architecture EV-DO Channel structure. PDSN. - PowerPoint PPT PresentationTRANSCRIPT
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Wireless CommunicationCDMA EVDO Systems
Dr. Mustafa Shakir
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Contents
CDMA 1X Packet Data Service Functional Entities
1X Packet Data Service Status CDMA Evolution EV-DO Network Architecture EV-DO Channel structure
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PDSN As a access gateway , PDSN (packet data service node)
provides the cdma2000 mobile station with services for Internet access or Intranet access. PDSN acts as an interface between Radio Network and Packet Data Network.
Provides the mobile station with Simple IP access service or Mobile IP access service. In Simple IP,PDSN acts as a Network access server, while in Mobile IP,PDSN acts as Foreign Agent (FA) for Mobile Station.
At the cdma2000 1x stage, the maximum access rate available for each subscriber is 153.6kbps, and at the cdma2000 1x EV-DO (Evolution Data Only) stage, the maximum access rate available for each subscriber will be as high as 2Mbps.
PDSN acts as a client of AAA server.
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AAA AAA authenticates the script file information of the
subscribers, authorizes data services, and Collects accounting information from PDSN, completes accounting. Authentication
simple IP and mobile IP. Authorization
subscriber configuration information. Accounting
collecting billing data(both radio specific and IP network specific) for each packet data call.
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Home Agent HA(Home Agent) is responsible to maintain
the current registration of the MS and redirections packets to the PDSN(FA).
Performs authentication and authorization uses AAA server.
Assigns MS home IP addresses after authentication by mobile IP protocol.
Only uses in Mobile IP.
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CDMA2000 1x Packet Domain
CSCS
PSPS
cdma2000 EVDOcdma2000 EVDO
cdma2000 1x cdma2000 1x BSC/PCFBSC/PCF
MSC/HLRMSC/HLR
I P Network
IP Network
ANAN
HLR
IPNetwork
AAAAAABilling SystemBilling System
OMC
FirewallFirewall
HA/LNSHA/LNSI P Network
IP Network
AN-AAA
PDSN/FAR-P
R-P
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Access Method Simple IP Access
Similar to the network access through dialing-up modem on the fixed telephone . Assigning dynamic IP addresses and accomplishing the data communication with MS as the calling party .
Simple protocol, easily accomplish, but data communication will be interrupted when MS handoff between different PPP link.
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Access Method (Cont.) Mobile IP Access
Providing a route mechanism in the internet. Assigning MS fixed addresses to connect to any sub-network.
Accomplishing the data communication with MS as the calling party or the called party, and holding data communication when MS handoff between different PPP link.
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PDSN Mobile IP Access
PDSN/FA BSC/PCF
BTSZTE
BTS
FAAA
FW
IP Network
MS
FW
APP Servers
HAAA
HAZTE
Signaling
User Data
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Contents
CDMA 1X Packet Data Service Functional Entities
1X Packet Data Service Status CDMA Evolution EV-DO Network Architecture EV-DO Channel structure
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Service Status
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Service Status Active/Connected: There are traffic channels between
Mobile Station (MS) and BS, and data can be exchanged between them. In this state, the A10 and PPP connections are kept.
Dormant: There are no traffic channels between MS and BS. A10 and PPP connections remain.
Null/Inactive: There are neither traffic channels nor A10 connections between MS and BS. Besides, there is no PPP connection between MS and PDSN.
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How to know? When Active, Dormant & Inactive 1. About “DRS” When a mobile terminal sends an origination
request with a packet data service option specified, it will include the Data Ready to Send (DRS) bit. When DRS bit set to 1 to indicate that it has data
to send. When DRS bit set to 0 to indicate that it has not
data to send, just to update the network
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2. About “packet data inactivity timer” In BSC or MS, they both have a packet data
inactivity timer to identify whether there are data frame sent/received or not.
The timer should be reset whenever non-idle Radio Link Protocol data frames are sent or received.
If the packet data inactivity timer expires, the BSC or MS should release the traffic channel.
How to know? When Active, Dormant by & Inactive
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Bluetooth
WLAN
InsideOffice
InsideBuilding
High MobilityOutside
Low MobilityOutside
100 Mbps
10 Mbps
1 Mbps
100 kbps
1 Gbps
UMTS
GSM / GPRSGSM / GPRS
Wi-MAXWi-MAX
CDMA2000 1xEVDO
Comparison of Wireless Systems (CDMA Evolution)
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Contents
CDMA 1X Packet Data Service Functional Entities
1X Packet Data Service Status CDMA Evolution EV-DO Network Architecture EV-DO Channel structure
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AT
Target AN
Source AN
PCF PDSN
AN AAA
A12 AAA
AN
IP Network
AT
IP Network
AT
Target AN
Source AN
PCF PDSN
AN AAA
A12 AAA
AN
IP Network
AT
IP Network
1X EVDO Network Structure
AT access terminal
AN Access Network
A12 authentication used by the AN to authenticate 1x EV-DO Access terminal
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Comparison of EVDO and 1x Networks
MS/AN
HLR
PDSN
AAA
BTSB BSCB PCF
MSC
ANAAA
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Network Implementation