China Mobile Hong Kong (CMHK) launched the world’s first converged Long Term Evolution (LTE) FDD/TDD network on 18 December as scheduled. At the official launch one of its two network technology suppliers Ericsson demonstrated the world’s first live seamless bi-directional LTE FDD/TDD interworking on the converged 4G network. Ericsson was the sole supplier for CMHK’s LTE FDD network – which launched in April 2012 – while in July CMHK awarded ZTE and Ericsson contracts to expand the capacity and coverage of its 4G network by deploying LTE-TDD (TD-LTE) technology, aiming for dual-mode coverage of over 70% of the territory. According to CMHK both vendor companies have an equal share of the network construction project, with ZTE supplying equipment for the network in primary commercial areas of Hong Kong while Ericsson is responsible for the remaining areas. In its own press release Ericsson says it has delivered TD-LTE radio access infrastructure as well as network management using Ericsson OSS-RC (Operation Support System for Radio and Core) and an Evolved Packet Core network expansion and upgrade.
As part of the launch Ericsson also assisted CMHK and parent China Mobile with the first TD-LTE roaming services between Hong Kong and mainland China. The launch event showcased a series of applications based on TD-LTE data roaming between Hong Kong and Shenzhen in China’s Guangdong Province. The demonstration was supported by the LTE FDD/TDD converged commercial network in Hong Kong, as well as the TD-LTE Evolved Packet Core (EPC), In-Building Solution (IBS) site and universal SIM (USIM) deployed by Ericsson in Shenzhen. The demonstration showcased real-time high-definition video interaction between the two cities on TD-LTE networks for the first time, involving the LTE FDD/TDD dual-mode terminal in Hong Kong providing roaming to Shenzhen, as well as the TD-LTE terminal in Shenzhen providing roaming to Hong Kong.