Random Access or Scheduling: Optimum LTE Licensed-Assisted Access to Unlicensed Spectrum

To deploy long-term evolution advanced (LTE-A) networks on unlicensed bands, licensed-assisted access (LAA) has been regarded as an unprecedented technology in the third generation partnership project (3GPP) Rel-13. However, due to uncontrollable interference from collocated WiFi networks, a particu...

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Bibliographic Details
Published in:IEEE communications letters 2016-03, Vol.20 (3), p.590-593
Main Authors: Shao-Yu Lien, Lee, Jorden, Ying-Chang Liang
Format: Article
Language:English
Subjects:
3GPP LAA
IEEE 802.11 Standard
Interference
Mobile communication
Mobile computing
optimum radio access
Radio transmitters
Throughput
Uplink
WiFi
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Summary:To deploy long-term evolution advanced (LTE-A) networks on unlicensed bands, licensed-assisted access (LAA) has been regarded as an unprecedented technology in the third generation partnership project (3GPP) Rel-13. However, due to uncontrollable interference from collocated WiFi networks, a particular LAA-WiFi hidden terminal problem may occur, thus degrading the performance of the existing scheduling-based radio access in LTE-A. To provide foundations for LAA standardization, we analytically derive the optimum radio access for LAA, which reveals a dynamic switch between scheduling-based and random access schemes. The switching condition derived in this letter thus suggests the optimum design for LAA networks.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2016.2516527