Motorola’s Networks business announced today that it showcased an end-to-end TD-LTE demonstration, based on what it claims is the world's first TD-LTE USB dongle.

TD-LTE is a version of the fourth-generation (4G) Long Term Evolution (LTE) wireless technology that most wireless carriers are moving toward. The TD-LTE version is based on time division duplexing (in most other occasions shortened to TDD).

Interest in TD-LTE continues to grow, Motorola explained, because of the low cost of TDD spectrum (particularly in emerging and developing markets), operators' continuing need for more capacity and spectrum, and the ability to hand-off between TD-LTE and LTE FDD (frequency division duplex) networks.

The ability to roam between LTE FDD and TD-LTE, Motorola said, means operators can use TD-LTE networks to augment their FDD LTE network for more capacity or other applications such as video broadcasting, while operators choosing to use TD-LTE as their "main" network can still offer their subscribers the ability to roam to other operators' FDD LTE networks in different countries.

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