The China Wireless Technology Standard Group (CWTS) submitted the first version of TD-SCDMA to International Telecommunication Union (ITU) in 1998 as one of numerous candidate proposals for IMT- 2000 (UMTS WCDMA, cdma2000, etc.), which was subsequently approved by ITU as a 3G standard in May 2000 and later also joined 3GPP family in March 2001. As its name suggests, the TD-SCDMA standard bears two major characteristics: one is to adopt Time Division Duplex (TDD) mode operation for up and down links separation; the other is to use synchronous CDMA technology.
Because of the state-of-art standard and technique, the TD-SCDMA standard can satisfy the requirements for constructing stand-alone networks for large geographic coverage, and can also provide complementary solutions to other networks to meet specific market demands.
Take the advantages of TD-SCDMA--high efficient frequency utility, low cost equipments and simple operation & maintenance into account, TD-SCDMA is the ideal solution for the mobile network operators to establish the total service network.