TD-LTE - Time-Division Long-Term Evolution

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Time-Division Long-Term Evolution (TD-LTE), also referred to as Long-Term Evolution Time-Division Duplex (LTE TDD), is China's home-grown 4-G mobile-telecommunications technology and standard co-developed, since late 2007, by Datang Telecom, China Mobile, Huawei, ZTE, Nokia Siemens Networks, Alcatel Shanghai Bell, Qualcomm, ST-Ericsson, Leadcore, etc. It is one of two variants of the 3GPP Long Term Evolution (LTE) technology, the other being Frequency-Division Long-Term Evolution (FD-LTE or LTE FDD). Likewise, TD-LTE-Advanced is an LTE Advanced time-division variant, an evolutionary upgrade version of TD-LTE.

Source: Wikipedia