Microsoft PowerPoint - GSM,UMTS,WiMax Tech_intro

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Microsoft PowerPoint - GSM,UMTS,WiMax Tech_intro

  1. 1. Introduction of GSM, UMTS & WiMax Technology www.pacificwave-wireless.com
  2. 2. Network Architecture Comparison GSM Architecture (1) Radio: TDMA Access Core: Circuit-Switched Domain (PCM) and Packet- Switched Domain (ATM) Services: Voice & Data call Limited Bandwidth Data Access (2.5G) www.pacificwave-wireless.com
  3. 3. Network Architecture Comparison GSM Architecture (2) Circuit - E1/T1 Switched E1/T1 Platform Cell-0 Cell-2 MSC- PSTN / Other MSC Gateway Operator Cell-1 TRAU HLR BSC SMS EIR /AC Internet / IP SGSN GGSN Network Based PCU ATM Radio Access Network Core Network Packet Data Flow Switched Data Flow www.pacificwave-wireless.com
  4. 4. Network Architecture Comparison GSM Architecture (3) www.pacificwave-wireless.com
  5. 5. Network Architecture Comparison UMTS Architecture (1) Radio: WCDMA Core: ATM Platform in both Circuit-Switched Domain and Packet- Switched Domain Services: Voice Call, Video Call and Data Call Broadband Data Access (3.5G) www.pacificwave-wireless.com
  6. 6. Network Architecture Comparison UMTS Architecture (2) ATM Switch Platform ATM ATM over T1 /FO/STM-1 Cell-0 Cell-2 - MSC- MSC PSTN / Other Gateway Operator Cell-1 Service / RNC Application EIR HLR /AC Internet/IP Based SGSN GGSN Network ATM Radio Access Network Core Network Packet Data Flow Switched Data Flow www.pacificwave-wireless.com
  7. 7. Network Architecture Comparison UMTS Architecture (3) www.pacificwave-wireless.com
  8. 8. Network Architecture Comparison WiMAX Architecture (1) Radio: OFDM/OFDMA Core: All IP Platform with Packet-Switched Domain Services: Voice Call, Video Call, Multimedia Streaming & Data Call Broadband Data Access www.pacificwave-wireless.com
  9. 9. Network Architecture Comparison WiMAX 16e Architecture INTERNET PSTN VOIP SIP SERVER BTS ETHERNET ETHERNET IP-BASED-CORE NETWORK ASN Gateway MULTIMEDIA OTHER SERVER APPLICATION SERVER Access Service Network Core Service Network www.pacificwave-wireless.com
  10. 10. Network Architecture Comparison WiMAX 16d Architecture INTERNET PSTN VOIP SIP SERVER BTS ETHERNET IP-BASED-CORE NETWORK MULTIMEDIA OTHER SERVER APPLICATION SERVER Access Service Network Core Service Network www.pacificwave-wireless.com
  11. 11. Radio Access Comparison Duplex Technology BTS SUBSCRIBER FDD -Dual Polarization Antenna TRANSMITTER FREQUENCY X RECEIVER (Different UL/DL Freq) -Better Noise Floor AT THE SAME TIME -Inefficient Spectrum RECEIVER TRANSMITTER FREQUENCY Y - BTS SUBSCRIBER TDD -Single Polarization Antenna (The same UL/DL Freq) FREQUENCY-X TRANSMITTER RECEIVER - 3dB worse Noise Floor - efficient Spectrum AT THE DIFFERENT TIME RECEIVER FREQUENCY-Y - TRANSMITTER Half-FDD -Single Polarization Antenna. BTS SUBSCRIBER (Different UL/DL Freq at Different Time) - 3dB worse Noise Floor - efficient Spectrum TRANSMITTER FREQUENCY-X RECEIVER AT THE DIFFERENT TIME RECEIVER FREQUENCY-Y TRANSMITTER www.pacificwave-wireless.com
  12. 12. Radio Access Comparison Physical Layer TDMA (GSM) CDMA (CDMA) WCDMA(3G) OFDM (WIFI,Pre-WiMAX,WiMAX) www.pacificwave-wireless.com
  13. 13. Radio Access Comparison TDMA (GSM) 200 KHz Radio Channel Combine up to 24 Radio Channels per cell Modulation: GMSK (Voice & GPRS) and 8- PSK (EDGE) www.pacificwave-wireless.com
  14. 14. Radio Access Comparison WCDMA(3G) 5 MHz Radio Channel for W-CDMA Single Radio Channel per cell Modulation: QPSK(3G) and 16-QAM(3.5G) www.pacificwave-wireless.com
  15. 15. Radio Access Comparison OFDM/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 cell Modulation: BPSK,QPSK,16QAM, and 64QAM www.pacificwave-wireless.com
  16. 16. Radio Access Comparison OFDM (16d) vs. OFDMA (16e) www.pacificwave-wireless.com
  17. 17. Radio Access Comparison Bandwidth Per Tone Fixed WiMAX BTone = (BW*SampliFreq)/(Tot.of Tones) Mobile WiMAX BTone = fixed value as 10.94 Khz www.pacificwave-wireless.com

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