TDD,downlink and uplink traffic use the same channel and separated by time space
- 适合unsymmetrical业务,如因特网数据业务
- lower speed support,e.g. up to 120Km/h,因为TDD芯片处理速度跟不上
- TDD基站成本比FDD低,重要原因之一,TDD中,上下行数据共用同一频率,更适合智能天线,loss减少,效率增加
FDD,downlink and uplink traffic use separate channels
- 适合symmetrical业务,但对于unsymmetrical业务,频谱利用率大大降低
- higher speed support,e.g. up to 500Km/h
- 抗干扰性能优于TDD