Telecommunication Development Industry Alliance（TDIA) was found on October 30th, 2002. It is a social organization formed voluntarily by enterprises who actively commit themselves to the development of TDD mobile communication technology and engage in the R&D, production and service of TDD standard and products. By August, 2015, the total number of TDIA member enterprises comes to 100, covering from operation, network, chipset, UE, testing and antenna vendors. TDIA is dedicated to developing and promoting the TDD technology. By integrating and coordinating industry resource, TDIA hopes to stimulate the development progress of TD-SCDMA, TD-LTE and its evolution technology to enable its global deployment and operation. TDIA has become an important international platform of TD industry development.