This article is describing the WINNER+ approach to performance evaluation of 3GPP LTE-Advanced proposal as IMT-Advanced technology candidate. Official registered WINNER+ Independent Evaluation Group evaluated this proposal against ITU-R requirements. First part of the article gives an overview on ITU-R evaluation process, criteria and scenarios. Second part is focused on the working method of the evaluation group emphasising simulator calibration approach. Finally the article contains exemplary evaluation results based on analytical and simulation approaches. The obtained results allow WINNER+ to confirm that the 3GPP LTE Release 10 & Beyond (LTE-Advanced) proposal satisfies all the IMT-Advanced requirements, thus it qualifies as IMT-advanced system.
Open Loop Power Control is an important technique providing adaptation of user transmit power. There are multiple factors like cell size, interference conditions, etc. that determine the optimal settings of power control (PC) parameters. In this paper, the impact of open loop PC parameter settings on the performance of LTE uplink (UL) in a co-channel heterogeneous network (HetNet) scenario with macro-and pico presented. Further, we study the difference in optimal PC settings for various network deployment scenarios and cell range extension (CRE) offsets in order to determine sensitivity of parameter settings. It is found that optimal PC parameters for one case can serve as good parameters for other network configurations as well. The conclusions are supported by results of system-level simulations.
Abstract-Mobile communication technology has been rapidly evolving ever since its first introduction in the late 1980s. The development witnessed is not just in the refinement of the radio access techniques, but also in the progression towards offering sophisticated features and services to the mobile phone users. To fulfill this ever-growing user demand and market trends, frequency ranges in millimeter wave bands are envisioned for wireless radio transmission. To respond to this trends, the EUfunded mmMAGIC project has been launched and its main objective is to design and develop radio access techniques operating in 6 -100 GHz bands. When it comes to developing technologies for systems operating these frequency ranges, a major challenge encountered will be in terms of its radio access network integration. Unquestionably, issues at various aspects of physical layer design, channel modelling, architecture, network functions and deployment will be encountered; problems in multi-node and multi-antenna transceiver designs will surface as well. The work carried in this project will address those challenges and propose solutions; but additionally, measure its efficiency against the project specific KPIs set to meet the requirements of the operational future 5G systems. The main intention of this paper is to outline some of the challenges, more specifically to highlight the network integration challenges, and discuss some of its technical solutions. The primary purpose here is to focus towards integrated 5G technology, thereby opening further research avenues for the exploration of new and alternate frequency bands in the electromagnetic spectrum.
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