The world is moving towards TD-SCDMA Mobile technology
TD-SCDMA is based on spread spectrum technology, which uses Time-division duplexing, in contrast to the FDD (Frequency division Duplexing) scheme used by WCDMA. By dynamically adjusting the number of timeslots used for downlink and uplink, the system can more easily accommodate asymmetric traffic with different data rate requirements on downlink and uplink than FDD schemes. Since it does not require paired spectrum for downlink and uplink, spectrum allocation flexibility is also increased.
TD-SCDMA is the Chinese contribution to the ITU's IMT-2000 specification for third generation (3G) wireless mobile services. TD-SCDMA (3G) mobile technology has enormous potential in the largest mobile market in the world, with sales of over five million handsets a month. China has no wish to be dependent on Western technology, and this has led to investment in the new standard.
China Mobile reported that subscribers grew from 457.3 million to 488.1 million during the first five months of 2009. According to a PC World report, which cites a recent China Mobile filing with the US Securities and Exchange Commission (SEC), the operator had 746,000 subscribers on its 3G network by the end of May, representing just 2.4 percent of total net additions since the launch of the new TD-SCDMA network on 7 January.
Eventually China Mobile admits that the fact that less than 3 percent of its new mobile customers are using their new 3G network, suggesting that their TD-SCDMA network is suffering from a lack of compatible devices. But china has taken all measures to increase the TD-SCDMA mobile vendors to overcome this disadvantage.
Also they made The TD-SCDMA telephones to support both TD-SCDMA and GSM networks, which will ensure the call quality before the full coverage of the TD-SCDMA signal is activated. After the TD-SCDMA network coverage is completed, the users can switch to the TD-SCDMA network, so as to reduce operating costs with scale effect.