NTT DOCOMO and Huawei have completed a live demonstration of the co-channel existence between Licensed-Assisted Access (LAA) and Wi-Fi systems in a dense small cell enviroment, progressing from a lab test that both companies conducted last year. Huawei claims that the test confirms the capability of LAA to provide fair co-existence as well as robust performance, thus promising deployment in a real commercial network. The LAA deployment in an unlicensed band was conducted during the DOCOMO R&D Open House 2015 held at the DOCOMO R&D Center in Yokosuka Research Park.
In the latest demonstration, 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.
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 domains, 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, claims Huawei.