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Author: | Hakola, Petri |
Title: | Macro Diversity Combining Optimization in HSPA flat architecture |
Publication type: | Master's thesis |
Publication year: | 2009 |
Pages: | vii + 73 Language: eng |
Department/School: | Tietoliikenne- ja tietoverkkotekniikan laitos |
Main subject: | Tietoliikennetekniikka (S-72) |
Supervisor: | Jäntti, Riku |
Instructor: | Kynäslahti, Ari |
Electronic version URL: | http://urn.fi/URN:NBN:fi:aalto-201203071281 |
OEVS: | Electronic archive copy is available via Aalto Thesis Database.
Instructions Reading digital theses in the closed network of the Aalto University Harald Herlin Learning CentreIn the closed network of Learning Centre you can read digital and digitized theses not available in the open network. The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/ You can read theses on the Learning Centre customer computers, which are available on all floors.
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Location: | P1 Ark S80 | Archive |
Keywords: | UMTS WCDMA soft handover macro diversity combining |
Abstract (eng): | This thesis, Macro Diversity Combining Optimization in High Speed Packet Access (HSPA) flat architecture, concentrates on analyzing implementation alternatives of Marco Diversity Combining (MDC) in fiat architecture. When centralized elements, like Radio Network Controller (RNC), are removed from the architecture, centralized functionalities need to be implemented differently. One of the most important centralized functionality is Macro Diversity Combining which collects traffic from multiple base stations and improves radio performance like bit rate and coverage area. When this functionality is implemented inside base station traffic needs to be sent between base stations. Traffic between base stations creates new requirements for transport network and potentially also increases operator transport cost. In short, if MDC is fully implemented, traffic between base stations is maximized and opposite, if MDC is left out, radio performance is reduced. The thesis starts with the overview introduction of Universal Mobile Telecommunication System (UMTS) network. Here we discuss the architecture of the UMTS packets switched network, and the main functionalities of the Radio Resource Management (RRM): power control and handover control. A deeper look is taken into evolution of 3GPP packet access namely High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Data Access (HSUPA) plus the relevant HSDPA cell change and HSUPA handovers are covered. A short glance is also taken into the gains introduced by MDC. In this thesis four proposals presented in 3GPP to improve the MDC with regards to utilization of transport network, implementation complexity, radio performance, latency and amount of additions to existing 3GPP specifications are evaluated. Finally, an implementation alternative for MDC optimization in flat architecture is presented based on the proposals in 3GPP. |
ED: | 2009-08-18 |
INSSI record number: 38130
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