Downlink Interference Control of LAA-LTE for Coexistence With Asymmetric Hidden Wi-Fi APs
SCIE
SCOPUS
- Title
- Downlink Interference Control of LAA-LTE for Coexistence With Asymmetric Hidden Wi-Fi APs
- Authors
- Lee, Harim; Yang, Hyun Jong
- Date Issued
- 2019-11
- Publisher
- Institute of Electrical and Electronics Engineers
- Abstract
- To confront the increasing mobile traffic demand and the scarcity of the licensed band, 3GPP has standardized a new type of LTE, called License Assisted Access (LAA) LTE (LAA-LTE), which aggregates licensed bands with unlicensed bands. Since the conventional Wi-Fi devices employ -62 dBm clear channel assessment threshold to LAA-LTE's signals, the appearance of LAA-LTE in the unlicensed band leads to a new phenomenon, asymmetric hidden terminal problem, which severely degrades the throughput and delay performance of LAA-LTE as well as Wi-Fi. We propose a downlink interference control scheme for an LAA-LTE eNB to prevent the asymmetric hidden Wi-Fi APs nearby from recklessly transmitting and thereby interfering the eNB's transmission. Specifically, we analyze the distortion of Wi-Fi's signals received at LAA-LTE and LAA-LTE's signals received at Wi-Fi due to the difference of physical-layer parameters between LAA-LTE and Wi-Fi. Based on this analysis, we develop an AP suppression and power control technique to control incoming and outgoing interference of the LAA-LTE eNB. Extensive simulations confirm that the proposed scheme improves the throughput and delay performance of LAA-LTE while maintaining or even improving the performance of Wi-Fi.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/105746
- DOI
- 10.1109/tvt.2019.2939881
- ISSN
- 0018-9545
- Article Type
- Article
- Citation
- IEEE Transactions on Vehicular Technology, vol. 68, no. 11, page. 10909 - 10925, 2019-11
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.