ST-Ericsson and Ericsson demonstrated the world’s first dual-mode high-definition (HD) Voice over LTE (VoLTE) connection between LTE FDD and LTE TDD (TD-LTE) with China Mobile on Tuesday, February 26 at Mobile World Congress in Barcelona. The demonstration used ST-Ericsson’s commercial Thor LTE multimode modem and connected to Ericsson’s commercially verified LTE FDD/TDD converged network and mature IMS platform.

VoLTE uses IP packet-based networks for voice calls. It transmits voice into data to carry out transmissions, enabling a richer telephony experience and HD audio in combination with low power consumption, ST-Ericsson said. According to GSA, 61 mobile networks have launched HD voice services in 45 countries. ST-Ericsson notes the strong business case for mobile HD voice, which customers prefer and operators can use to differentiate their offerings.

“The technology readiness and commercial availability of the system, platform, and terminals of TD-LTE that we demonstrated here is a strong testimonial of the maturity of a converged end-to-end TD-LTE ecosystem. Ericsson is determined to work continuously with China Mobile and operators around the world to drive the globalization and commercialization of TD-LTE,” said Mats H. Olsson, president of Ericsson North East Asia.

“ST-Ericsson’s Thor modem solutions and NovaThor ModAp solutions are multimode platforms that are capable of supporting TD-LTE/LTE FDD/WCDMA/TD-SCDMA/GSM. In addition, ST-Ericsson’s modem and ModAp platforms are able to provide complete voice solutions including VoLTE, CSFB, and SRVCC. We hope to continue our cooperation with China Mobile to promote the development of TD-LTE,” said Mats Norin, executive VP and CTO of ST-Ericsson.

China Mobile

ST-Ericsson