Technology - Mobile 6 - 3G UMTS, WCDMA, HSPA, LTE

Synopsis

We discuss in detail the 3GPP’s UMTS WCDMA technology in its current releases and the forthcoming Release 7, including QoS, HSDPA, HSUPA and novel antenna techniques. We also consider the plans for Long Term Evolution (LTE) and discuss the long term prospects for UMTS dominating over its competitors CDMA2000 and both fixed and mobile WiMAX.

Table of Contents

• 1. Synopsis
  
• 2. UMTS WCDMA
  
  • 2.1 Technical Standards
    
    • 2.1.1 Release 99
      
    • 2.1.2 Release 4
      
    • 2.1.3 Release 5
      
    • 2.1.4 Release 6
      
    • 2.1.5 Release 7
      
  • 2.2 5MHz wide channels
    
  • 2.3 Variable length spreading codes
    
  • 2.4 Signalling information
    
  • 2.5 GSM and WCDMA interworking
    
  • 2.6 Packet- and circuit-switched data
    
  • 2.7 850MHz operation
    
  • 2.8 Modulation and power control
    
  • 2.9 Soft handover and frequency reuse
    
    • 2.9.1 Hard handover
      
    • 2.9.2 Soft handover
      
    • 2.9.3 Softer handover
      
  • 2.10 Quality of Service (QoS)
    
    • 2.10.1 Conversational
      
    • 2.10.2 Streaming
      
    • 2.10.3 Interactive
      
    • 2.10.4 Background
      
• 3. High Speed Packet Access (HSPA)
  
  • 3.1 High-Speed Downlink Packet Access (HSDPA)
    
    • 3.1.1 Modulation and Latency
      
    • 3.1.2 Fast Scheduling and Link Adaptation
      
    • 3.1.3 Hybrid Automatic Repeat Request (HARQ)
      
  • 3.2 High Speed Uplink Packet Access (HSUPA)
    
  • 3.3 HSPA for VoIP
    
  • 3.4 HSPA+
    
    • 3.4.1 Mobile Receive Diversity
      
    • 3.4.2 Channel Equalisation
      
• 4. New SIM functions
  
• 5. 4G Long Term Evolution (LTE)
  
  • 5.1 1.23 to 20MHz RF bands
    
  • 5.2 OFDM for downlink
    
  • 5.3 Multiple Input - Multiple Output (MIMO)
    
  • 5.4 SC-FDMA for uplink
    
    • 5.4.1 Minimising Peak to Average Power Ratio
      
    • 5.4.2 Synchronising the receiver
      
• 6. Systems Architecture Evolution - SAE
  
• 7. UMTS vs CDMA2000 and WiMAX
  
  • 7.1 Mobile WiMAX
    
  • 7.2 CDMA2000 and Ultra Mobile Broadband (UMB)
    
  • 7.3 UMTS LTE vs fixed WiMAX
    
• 8. Related reports