Compared with the FDD system, TD-SCDMA adopting TDD, has no need of symmetrical frequency bands for uplink and downlink, and enables flexible and convenient planning and use of increasingly scarce spectrum resources.

• 与FDD系统相比，TD-SCDMA采用时分双工方式，上下行无需对称频段，可以见缝插针，灵活方便地规划使用日益紧张的频谱资源。