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Get Ready for Real 4G

LTE-Advanced (LTE Rel. 10 and beyond), the real 4G standard, is a response to the rapidly growing traffic generated by the widespread adoption of smartphone devices. The new standards aim to achieve a higher level of system performance than LTE Rel. 8, while maintaining backwards compatibility. To meet these performance targets ITU-T has announced new requirements, based on the LTE-A radio access interface specifications developed in 2011.

Facing the new level of demands placed on radio access interfaces means achieving new standards in key areas:

Figure 1 :  Roadmap to Real 4G

  • Peak spectral efficiency
  • Cell spectral efficiency
  • Cell edge user spectral efficiency
  • Bandwidth
  • Latency
  • Mobility
  • Handover interruption time
  • VoIP capacity

A series of innovative technologies have been developed to meet these competitive requirements (Figure 2), and are now being implemented in LTE-Advanced networks. Carrier Aggregation (CA, Figure 3), Enhanced Uplink Multi-antenna Transmission, CoMP Reception in the Uplink, and an array of other techniques are already boosting the performance of the world’s most cutting edge mobile networks. LTE-Advanced will enable 1 Gbps downlink bandwidth (Figure 4) without sacrificing legacy LTE services and open a new era of true wireless broadband services in the near future.

Figure 2 :  New Technology in LTE-Advanced

Figure 3 :  Carrier Aggregation (CA)

Figure 4 :  DL Acceleration with CA and MIMO

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