Abstract
Supporting the dual connectivity technology in non-stand-alone 5G scenarios involves three main functionalities: a user device (UD)-base station (BS) association (UBA) mechanism, a flow control algorithm (FCA) to determine the data split transmitted by each BS and radio resource management (RRM) algorithms. However, previous works only focused on the design of at most two of these functionalities. In thisletter, we go beyond and design a unified scheduling framework including the three aforementioned functionalities. The proposed framework targets the user satisfaction maximization and runs in a completely decentralized fashion, where the UBA algorithm runs independently at each UD, the FCA is executed at the master LTE BS and the RRM is performed individually by each BS. Simulations show the incremental gains of each proposed functionality as well as the total gain of the unified framework.
Highlights
The dual connectivity (DC) technology has been considered as a promising solution to meet the predicted requirements of fifth generation (5G) applications, such as ultra high throughput, enhanced mobility and high reliability
We demonstrate the gains provided by the proposed complete framework compared to existing solution that addressed at most two functionalities
We added two different flow control algorithm (FCA) from [8] and from [11], but the performances of the combined solutions did not achieve a performance close to our solution, showing the importance of having the three functionalities working with the same objective
Summary
The dual connectivity (DC) technology has been considered as a promising solution to meet the predicted requirements of fifth generation (5G) applications, such as ultra high throughput, enhanced mobility and high reliability. An envisioned solution for DC deployment is the bearer split configuration using non-stand-alone (NSA) 5G [1], which consists of secondary BSs employing the new radio (NR) radio access technology (RAT) anchored at a master long term evolution (LTE) BS. Such configuration relies on the tight interworking between the fourth generation (4G) and 5G standards, allowing a smooth transition from the legacy to the new technology. We demonstrate the gains provided by the proposed complete framework compared to existing solution that addressed at most two functionalities
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