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Improving Residential In-building Energy Performance for Multi-operator and Multi-standard Radio Access in Distributed Antenna Systems (DAS)
KTH, School of Electrical Engineering and Computer Science (EECS).
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Good signal in indoor environments has always been one of the mobile operator’s main challenges. The situation gets even more complex when dealing with new energy-efficient buildings that insulate the heat inside the building but at the same time causes higher losses from the macro base stations. In this scenario, indoor solutions are required to overcome this problem. Nowadays, there are two main indoor solutions: Distributed Antenna Systems (DAS) and small cells.

This thesis focuses on DAS solutions and investigates the power consumption difference between the two main architectures: Passive and Active/Hybrid DAS. The evaluation is made by measuring the power consumption of the active components and adding them to the already existing Base Station power consumptions models. Power consumption measurements were performed for four commercial bands: 900, 1800, 2100, 2600 MHz. Power consumption and system capacity trade-off between the passive and active DAS solutions is also presented. The capacity analysis is focused on LTE and applied to a real case study: Norra Tornen residential building. Final results show that up to 75% of the indoor power consumption can be saved when implementing an active DAS solution without affecting the service quality.

Abstract [sv]

God inomhustäckning har alltid varit en av mobiloperatörens huvudutmaningar. Situationen blir ännu mer komplex med hänsyn tagen till nya energieffektiva byggnader som isolerar värmen inuti byggnaden men samtidigt medför högre förluster för makrobasstationerna. I detta scenario krävs inomhuslösningar för att lösa problemet. Numera finns det två huvudsakliga inomhuslösningar: Distribuerade antennsystem (DAS) och små celler.

Denna avhandling fokuserar på DAS-lösningar och undersöker skillnader i effektförbrukning mellan de två huvudarkitekturerna: Passiv och Aktiv / Hybrid DAS. Utvärdering görs genom att mäta energikonsumtionen hos de aktiva komponenterna och lägga dem till de redan befintliga basstationernass modellerade effektförbrukning. Effektförbrukningsmätningar utfördes för fyra kommersiella band: 900, 1800, 2100, 2600 MHz. Effektförbrukning och jämförelser av kapacitet mellan passiva och aktiva DAS-lösningar presenteras också. Kapacitetsanalysen är inriktad på LTE och tillämpas på en realfallstudie: Norra Tornen en bostadsbyggnad i Stockholm. Slutliga resultat visar att upp till 75% av inomhusförbrukningen kan sparas när med en aktiv DAS-lösning utan att påverka servicekvaliteten.

Place, publisher, year, edition, pages
2018. , p. 54
Series
TRITA-EECS-EX ; 2018:590
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-249945OAI: oai:DiVA.org:kth-249945DiVA, id: diva2:1306377
Subject / course
Electrical Engineering
Educational program
Master of Science - Wireless Systems
Examiners
Available from: 2019-04-23 Created: 2019-04-23 Last updated: 2019-04-23Bibliographically approved

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