www.pacificwave-wireless.com Introduction of GSM, UMTS & WiMax Technology
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www.pacificwave-wireless.com
Introduction of GSM, UMTS & WiMaxTechnology
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Network Architecture ComparisonGSM Architecture (1)
Radio: TDMA AccessCore: Circuit-Switched Domain (PCM) and Packet-Switched Domain (ATM)Services: Voice & Data callLimited Bandwidth Data Access (2.5G)
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Network Architecture ComparisonGSM Architecture (2)
MSC
SGSN
MSC-Gateway
GGSN
PSTN / Other Operator
Internet / IP Network Based
EIRHLR/ACSMSBSC
TRAU
PCU
Cell-0 Cell-2
Cell-1
E1/T1
ATM
E1/T1
Radio Access Network Core Network
Packet Data Flow
Switched Data Flow
Circuit-Switched Platform
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Network Architecture ComparisonGSM Architecture (3)
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Network Architecture ComparisonUMTS Architecture (1)
Radio: WCDMACore: ATM Platform in both Circuit-Switched Domain and Packet-Switched DomainServices: Voice Call, Video Call and Data CallBroadband Data Access (3.5G)
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Network Architecture ComparisonUMTS Architecture (2)
MSC
SGSN
MSC-Gateway
GGSN
PSTN / Other Operator
Internet/IP Based Network
EIR HLR/AC
Service / ApplicationRNC
Cell-0 Cell-2-
Cell-1
ATM
ATM
ATM over T1/FO/STM-1
Radio Access Network Core Network
Packet Data Flow
Switched Data Flow
ATM Switch Platform
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Network Architecture ComparisonUMTS Architecture (3)
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Network Architecture ComparisonWiMAX Architecture (1)
Radio: OFDM/OFDMACore: All IP Platform with Packet-Switched DomainServices: Voice Call, Video Call, Multimedia Streaming & Data CallBroadband Data Access
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Network Architecture ComparisonWiMAX 16e Architecture
IP-BASED-CORE NETWORK
PSTN
MULTIMEDIA SERVER
OTHER APPLICATION
SERVER
ASN Gateway
INTERNET
ETHERNET
ETHERNETBTS
Access Service Network Core Service Network
VOIP SIP SERVER
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Network Architecture ComparisonWiMAX 16d Architecture
IP-BASED-CORE NETWORK
PSTN
MULTIMEDIASERVER
OTHERAPPLICATION
SERVER
INTERNET
ETHERNETBTS
Access Service Network Core Service Network
VOIP SIP SERVER
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Radio Access ComparisonDuplex Technology
FDD-Dual Polarization Antenna
(Different UL/DL Freq)-Better Noise Floor-Inefficient Spectrum
TDD-Single Polarization Antenna(The same UL/DL Freq)- 3dB worse Noise Floor- efficient Spectrum
Half-FDD-Single Polarization Antenna.
(Different UL/DL Freq at Different Time)- 3dB worse Noise Floor- efficient Spectrum
TRANSMITTER
RECEIVER
FREQUENCY X RECEIVER
FREQUENCY Y-TRANSMITTER
BTS SUBSCRIBER
AT THE SAME TIME
TRANSMITTER
RECEIVER
FREQUENCY-X RECEIVER
FREQUENCY-Y- TRANSMITTER
BTS SUBSCRIBER
AT THE DIFFERENT TIME
TRANSMITTER
RECEIVER
FREQUENCY-X RECEIVER
FREQUENCY-Y TRANSMITTER
BTS SUBSCRIBER
AT THE DIFFERENT TIME
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Radio Access ComparisonPhysical Layer
TDMA (GSM)CDMA (CDMA)WCDMA(3G)OFDM (WIFI,Pre-WiMAX,WiMAX)
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Radio Access ComparisonTDMA (GSM)
200 KHz Radio ChannelCombine up to 24 Radio Channels per cellModulation: GMSK (Voice & GPRS) and 8-PSK (EDGE)
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Radio Access ComparisonWCDMA(3G)
5 MHz Radio Channel for W-CDMASingle Radio Channel per cellModulation: QPSK(3G) and 16-QAM(3.5G)
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Radio Access ComparisonOFDM/OFDMA (WiMAX)
1.25, 3.5, 5, 7, 8.75, 10, 14, 20, 25,and 28 MHz Radio Channel Single Radio Channel or Combined Radio Channels per cellModulation: BPSK,QPSK,16QAM, and 64QAM
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Radio Access ComparisonOFDM (16d) vs. OFDMA (16e)
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Radio Access ComparisonBandwidth Per Tone
Fixed WiMAXBTone = (BW*SampliFreq)/(Tot.of Tones)Mobile WiMAXBTone = fixed value as 10.94 Khz
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