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Fixed-Mobile Wireless Networks Convergence

Wireless networks in comparison to fixed networks:

  • Higher loss-rates due to interference 
  • Restrictive regulations of frequencies 
  • Low transmission rates 
  • Higher delays, higher jitter 
  • Lower security, simpler active attacking 
  • Always shared medium


  • Heterogeneous access technologies:
  • Multi-mode access devices 
  • Dual mode phones (WiFi, 2.5/3G), UMA 
  • Heterogeneous Services 
  • Cellular Internet access and Internet based voice/video access 
  • Challenges:
    • Time variant heterogeneous network characteristics 
    • Heterogeneous applications with different utilities 
    • System design and networking challenges