Posted: December 1, 2015
Enhanced LAA based on Adaptive LBT demonstrated in Tokyo

Huawei announced today the successful live demonstration of the co-channel coexistence between Licensed-Assisted Access (LAA) and Wi-Fi systems in a dense small cell scenario targeting realistic LAA deployment in an unlicensed band. The live demonstration was conducted jointly with NTT DOCOMO, INC., Japan’s largest mobile service provider, during the DOCOMO R&D Open House 2015 held at the DOCOMO R&D Center in Yokosuka Research Park near Yokohama, Japan

Huawei and DOCOMO successfully demonstrated LAA and Wi-Fi co-existence key technologies complying with standardized LAA in the 3rd Generation Partnership Project (3GPP), which is expected to be completed in Q1, 2016.

In this demonstration, different from a previous LAA demonstration held in July 2015, a multi-access points/multi-user small cell network was used to model a practical field test scenario, with an unlicensed carrier operating in air-interface rather than cable connection. The results further confirmed the capability of LAA to provide fair co-existence as well as robust performance and thus promising use of a real commercial network.

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At the same time, an enhanced (while still 3GPP standardization compatible) co-existence technology, called adaptive Listen-Before-Talk (LBT) proposed by Huawei, was tested in the demonstration. Due to the flexible resource reuse in both time and power domain, adaptive LBT can further achieve 50 percent LAA performance gain over baseline co-existence solution, while still providing fair co-existence to neighboring Wi-Fi systems.

The demonstration represents the latest successful collaboration by Huawei and DOCOMO deploying LAA, which began in early 2014. Huawei and DOCOMO will continue their close collaboration on this technology in terms of future evolution of LAA with the 3GPP.

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