Radio Link Modelling for Relay Deployment in Urban Macro-cells
Translated title
Radiolink modellering for planlægning af relæstationer i små makroceller
Author
Rodriguez, Ignacio
Term
10. term
Publication year
2011
Submitted on
2011-05-31
Pages
119
Abstract
Denne afhandling undersøger, om relaynoder kan forbedre mobildækning og kapacitet ved cellekanten i LTE-Advanced (en 4G-standard). Relaynoder er små enheder, der videresender signaler mellem brugere og den primære basestation. En afgørende forudsætning er en backhaul-forbindelse af høj kvalitet (forbindelsen mellem relæ og basestation). Når denne forbindelse er stærk, forbedres både SINR (signal-til-interferens-og-støj-forhold, et mål for signalkvalitet) og gennemstrømning (datahastighed). For at undersøge forbindelsen i praksis gennemførte vi feltmålinger i Aalborgs byområde. Resultaterne viser, at relaynoder er gavnlige under bestemte betingelser, herunder relæantennens højde og type samt det omgivende miljø. Path loss-modeller (modeller, der forudsiger, hvordan radiosignaler svækkes af afstand og forhindringer) er vigtige i designet af mobilnet. Vi sammenlignede forskellige modeller med målingerne for at karakterisere de forskellige forbindelser i et relænetværk.
This thesis investigates whether using relay nodes can improve mobile network coverage and capacity at the edges of cells in LTE-Advanced (a 4G standard). Relay nodes are small devices that forward signals between users and the main base station. A key requirement is a high-quality backhaul link (the connection between the relay and the base station). When this link is strong, the overall signal-to-interference-plus-noise ratio (SINR, a measure of signal quality) and data throughput improve. To examine this link in practice, we carried out field measurements in the urban area of Aalborg. Based on the results, relay nodes provide benefits under specific conditions, including the relay antenna’s height and type and the surrounding environment. Path loss models (tools that predict how radio signals weaken with distance and obstacles) are essential in cellular design. We compared different models with the measurements to characterize the various links in a relayed network.
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