Title: A proposal of Energy Saving Schemes at the UMTS Terrestrial Radio Access Network
Abstract:In UMTS environments the radio access network (UTRAN - UMTS terrestrial Radio
Access Network -, in UMTS nomenclature) is the highest CO2 emitter. Is it possible
to reduce these emissions? This study...In UMTS environments the radio access network (UTRAN - UMTS terrestrial Radio
Access Network -, in UMTS nomenclature) is the highest CO2 emitter. Is it possible
to reduce these emissions? This study presents a proposal of energy saving schemes
at this part of the UMTS network. The study concretely focuses on the possibility of
switching off certain UTRAN elements based on the trafic load at every moment in
order to make possible this energy saving. Special attention has been payed on the
UMTS Base Stations (known as Nodes B in the UMTS standardization literature)
and its controllers (also known as Radio Network Controllers, RNC).
A typical situation where this case could be applied is in the ofice and Financial
areas in cities. Trafic in these areas usually follow a certain periodic pattern, which
could be, somehow, approximated to a curve. This curve would have its maximums
at the ofice hours and its minimums specially at night. The difference of load
between day trafic and night trafic can be very signiFicant. In fact, mobile operators
design the network so to attend all the daytime trafic. It is not an exaggeration to
say that according to night trafic these networks are over-dimensioned.
The analysis has been made using well-known suitable propagation and trafic
models in order to evaluate different scenarios such as motorways or urban microcells.
Besides, the evaluation has been made according to different points of view,
such as the percentage of shut down cells, the impact of the blocking probability
target on the system performance or the number of users which are forced to make
a handover at the switching moments.
In addition, useful information about sustainability, global warming and mobile
communications has also been included in order to complete the most practical
parts of the work, as well as the most important features of the study, such as the
consumptions along the UTRAN or how to make a power budget.Read More
Publication Year: 2008
Publication Date: 2008-10-08
Language: en
Type: dissertation
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot