At Mobile World Congress 2013, Ericsson supported China Mobile in demonstrating the world's first dual mode HD voice over LTE (VoLTE) call between TD-LTE and LTE FDD. The demonstration was based on ST-Ericsson's multimode modem and Renesas Mobile' quad-mode chipsets, which are ready for mass production.
Ericsson said the success of the demonstration further paves the way for the ultimate commercial launch of Voice over TD-LTE. It added that TD-LTE and LTE FDD enjoy a technical similarity of over 90%, making it possible for both networks and terminal chipsets to share a common commercial platform.
By deploying communication services over an all-IP network, like LTE, the opportunity opens up to evolve the voice business and launch new services like HD voice and video calling, with telecom grade quality.
At present VoLTE has been put into commercial service with several operators, and the demand for TD-LTE voice services is also growing, not only because the coming expanded deployment of TD-LTE networks, but also the realization of TD-LTE voice will allow TD-LTE operators to free up their 2G and 3G frequency bands, creating a competitive edge at a time when spectrum resources are quickly becoming scarcer.
The demonstration also achieved HD quality TD-LTE voice service. As of January 2013, operators in 45 countries have launched HD voice over WCDMA/GSM/LTE in 61 live networks, supported by mainstream devices. HD voice over TD-LTE will ensure superior user experience also for TD-LTE subscribers in the near future.
At its MWC debut as an exhibitor, China Mobile showcased a series of innovative applications in an LTE TDD/FDD integrated network environment, and also demonstrated the most complete TD-LTE end-to-end converged ecosystem so far. The network infrastructure on site at the China Mobile booth, as well as the integration of multi-frequency bands and multi-vendor systems and terminals, were provided by Ericsson.
In December 2012, Ericsson assisted China Mobile Hong Kong in demonstrating the world's first live, seamless, bi-directional LTE TDD/FDD interworking on the converged LTE TDD/FDD network. The launch of this converged network architecture, based on the recognized 3GPP standard, combines the power of both networks to benefit both China Mobile Hong Kong and its subscribers and the industry as a whole.
The convergence of TD-LTE and LTE FDD enables operators to maximize networks based upon traffic demands and spectrum availability. Convergence provides an operator the flexibility to deploy LTE FDD and LTE TDD throughout the network to ensure adequate coverage, and then add additional LTE in those areas where additional capacity is needed.
With convergence, the TDD/FDD network can be operated as a single network with the scale needed to foster the transformation of industries like entertainment, transportation, education, healthcare and energy.