Licensed-assisted access for LTE in unlicensed spectrum: A MAC protocol design

Licensed-assisted access (LAA), which conveys control signal via licensed anchor carrier and data information via both licensed and unlicensed bands, is a promising solution to enhance the throughput of wireless communications. In view of the potential impact on the incumbent services in the unlicen...

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Bibliographic Details
Main Authors: Han, Shiying, Liang, Ying-Chang, Chen, Qian, Soong, Boon-Hee
Format: Conference Proceeding
Language:English
Subjects:
Access control
Channels
Conferences
Design engineering
Electronics
Guidelines
IEEE 802.11 Standard
License-assisted access
Long Term Evolution
LTE
MAC protocol
Media Access Protocol
Multiaccess communication
Paving
Sensors
Throughput
unlicensed bands
WiFi
Wireless communication
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Summary:Licensed-assisted access (LAA), which conveys control signal via licensed anchor carrier and data information via both licensed and unlicensed bands, is a promising solution to enhance the throughput of wireless communications. In view of the potential impact on the incumbent services in the unlicensed band, how to design the medium access control (MAC) protocol for LAA system to make fair and friendly coexistence with its neighboring incumbent users is one of the most critical and challenging issues. In this paper, a LAA using LTE (LAA-LTE) system in the WiFi unlicensed spectrum is investigated. The listen-before-talk (LBT) protocol is designed for the LAA-LTE system. By quantifying the WiFi throughput in the coexisting system, allowable LTE transmission time is determined by considering different targets of WiFi service protection. Then, the LTE transmission time is optimized for maximizing the overall normalized channel rate contributed by both LAA-LTE and WiFi system, with the protection to the WiFi system. Our work offers guidelines of designing the LAA-LTE system, paving the way to a controllable, not only harmonious, coexistence of LAA-LTE and WiFi systems in the unlicensed spectrum.
ISSN:1938-1883
DOI:10.1109/ICC.2016.7511104