"The Chinese mobile market is seeing tremendous growth and digital convergence is coming to the mobile mass market in China. The expansion of our Chengdu R&D Center will significantly strengthen our product creation responsiveness to evolving customer requirements in China. We aim to develop Nokia Chengdu R&D Center into one of the major R&D centers for Nokia core networks, developing products for mobile and convergence communications for the global markets," Jouni Pirhonen, head of the Chengdu R&D center, said in a news release.

The center was established last August and had focused on developing Internet Protocol multimedia subsystems. The facility's expansion will allow Nokia to develop carrier grade platform middleware and increase multimedia application development, the company said.

Financial details of the expansion plan were not disclosed.