Design and Evaluation of Licensed Assisted Access LTE in Unlicensed Spectrum
| Autor: | Du Ho Kang, Sorour Falahati, Jung-Fu Cheng, Havish Koorapaty, Karaki Reem, Daniel Larsson, Amitav Mukherjee, Evanny Obregon, Laetitia Falconetti |
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| Rok vydání: | 2016 |
| Předmět: |
Computer science
business.industry 05 social sciences 050801 communication & media studies 020206 networking & telecommunications Throughput 02 engineering and technology Research findings LTE in unlicensed spectrum Spectrum management Computer Science Applications 0508 media and communications Transmission (telecommunications) Telecommunications link 0202 electrical engineering electronic engineering information engineering Discontinuous transmission Electrical and Electronic Engineering business Telecommunications Communication channel Computer network |
| Zdroj: | IEEE Wireless Communications. 23:24-30 |
| ISSN: | 1536-1284 |
| DOI: | 10.1109/mwc.2016.1600049wc |
| Popis: | Licensed assisted access (LAA) is a new feature for 3GPP LTE systems to operate in the unlicensed spectrum. Under LAA, licensed carriers will be aggregated with unlicensed carriers in order to opportunistically enhance user throughput, while still offering seamless mobility and outdoor coverage. In order to coexist with other technologies in the unlicensed bands, several new functionalities for LAA LTE have been introduced, including longterm channel selection, short-term channel sensing based on listen-before-talk (LBT), and discontinuous transmission on a carrier with limited maximum transmission duration. In this article, we present research findings behind the designs for LAA systems. We discuss the impact of several parameters of the LAA LBT framework on the channel access opportunities of LAA, and its coexistence performance toward co-channel networks based on extensive system-level simulation results. The investigation covers both single-channel as well as multi-channel operation and coexistence scenarios. In addition to the finalized designs for downlink LAA operations in Release 13, our findings in this article further shed light on the uplink LAA operations to be introduced in Release 14. |
| Databáze: | OpenAIRE |
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