Economic technology analysis of LTE advanced pro dual spectrum licensed and unlicensed access using discounted cash flow methods

Analytical Model for Coexistence Performance Evaluation of WiFi and LTE Licensed-Assisted Access to Unlicensed Spectrum

—LTE Licensed-Assisted Access (LAA) to unlicensed spectrum has been considered as an effective complement in offloading growing traffic since its emergence at 3GPP. Since 2015, 3GPP has launched standardization to develop LAA as a key technology for LTE-Advanced unlicensed spectrum deployment in Rel-13. In this paper, an analytical model is built for the performance evaluation of typical coexi...

Uplink performance enhancement for LTE licensed-assisted access to unlicensed spectrum

Licensed-assisted access (LAA) is a new operation mode of carrier aggregation for the Long Term Evolution Advanced systems to transmit data on both licensed and unlicensed spectrum. To deal with the issue of co-existence with WiFi systems, LAA is required to perform listen-before-talk, which can significantly impact its resource utilization. In this paper, the concept called multi-subframe sche...

U-LTE: Unlicensed Spectrum Utilization of LTE

Unlicensed reuse of licensed spectrum: case UWB

In this paper, unlicensed reuse of licensed spectrum is discussed from the regulatory point of view. This issue concerns the regulator by the possibility of interference to existing services, and also the increase of spectrum efficiency. Ultrawideband (UWB) technology is an interesting subject for this matter and here, the topic of the paper is discussed through a case study of UWB.

Implementing opportunistic spectrum access in LTE-Advanced

Long term evolution advanced (LTE-A) has emerged as a promising mobile broadband access technology aiming to cope with the increasing traffic demand in wireless networks. However, the enhanced spectral efficiency offered by LTE-A may become futile without a better management of scarce and overcrowded electromagnetic spectrum. In this sense, cognitive radio (CR) has been proposed as a potential ...