U-LTE: Unlicensed Spectrum Utilization of LTE
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Realization of LBT for Co-existence of U-LTE with Wi-Fi using Cognitive Radio
The advanced cellular network, Long Term Evolution (LTE) which presently operates in licensed spectrum has been extended to Unlicensed LTE (U-LTE) by Qualcomm and Ericsson to improve data rate and spectral efficiency by utilizing unlicensed spectrum. Carrier Aggregation of 3GPP LTE-A supports the aggregation of licensed and unlicensed spectrum in small and femto cells to provide better user exp...
متن کاملEnabling Fair Spectrum Sharing between Wi-Fi and LTE-Unlicensed
Due to the fast increase of mobile traffic, most mobile network operators face the congestion issue in licensed spectrum bands. Several telecommunication vendors and operators propose to expand LTE service to the unlicensed spectrum bands to relieve the traffic congestion. However, LTE in unlicensed spectrum may interfere with Wi-Fi communications in the same bands and cause significant decreas...
متن کاملLTE and Wi-Fi Coexistence in Unlicensed Spectrum with Application to Smart Grid: A Review
Long Term Evolution (LTE) is expanding its utilization in unlicensed band by deploying LTE Unlicensed (LTEU) and Licensed Assisted Access LTE (LTE-LAA) technology. Smart Grid can take the advantages of unlicensed bands for achieving two-way communication between smart meters and utility data centers by using LTE-U/LTE-LAA. However, both schemes must co-exist with the incumbent Wi-Fi system. In ...
متن کاملD2D-U: Device-to-Device Communications in Unlicensed Bands
Device-to-Device (D2D) communication, which enables direct communication between nearby mobile devices, is an attractive add-on component to improve spectrum efficiency and user experience by reusing licensed cellular spectrum. Nowadays, LTE-unlicensed (LTE-U) emerges to extend the cellular network to the unlicensed spectrum to alleviate the spectrum scarcity issue. In this paper, we propose to...
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To avoid the foreseeable spectrum crunch, LTE operators have started to explore the option to directly use 5GHz unlicensed spectrum band being used by IEEE 802.11 (WiFi). However, as LTE is not designed with shared spectrum access in mind, there is a major issue of coexistence with WiFi networks. Current coexistence schemes to be deployed at the LTE-U BS create coexistence gaps only in one doma...
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