Planning And Analysis Of Energy Efficient Multi-rat Networks The Case Of Addis Ababa City

Now a day’s wireless communication is one of the most active areas of technologyrndevelopment. It enables customers to use communication services like telephony or internetrnservices at anytime and anywhere. A multitude of varying radio access technologies has beenrndeveloped in which they differ in their radio coverage, spectral efficiency, cell capacity, andrnpeak data rate. For a network operator different radio access technology may best be suited inrndifferent parts of the network in terms of the radio environment, the expected traffic pattern,rnand the anticipated services. But cooperating of multiple radio access technologies byrncombining into a common network to allow network convergence and resource managementrnis the main concern for the operator. rnOn the other hand, energy is a scarce resource and becoming a main concern due to thernincreasing demands on natural energy resources. Hence, implementation of energy efficientrncommunication networks has become the main research concern currently. Therefore, avoidingrnof unnecessary energy consumptions by adopting sleep mode mechanisms is promisingrnsolution as BSs consume the highest proportion of energy expenditure in cellular networks.rnSleep mode techniques aim to save energy by selectively turning off BSs during “off-peak”rnhours. rnThis thesis deals with the procedure of how to carry out the Multi-RAT RNP for 2G, 3G, andrn4G networks and reduce power consumption of the planned network without compromisingrnthe expected service. All the required steps and methods of RNP for Multi-RATs includingrnGSM, UMTS & LTE like dimensioning, site selection for BS location, and radio resourcernmanagement strategies has been addressed. The RNP focuses specially on the coverage,rncapacity dimensioning and frequency planning. Finally, minimizing of BSs energyrnconsumption by switching off selective BSs based on daily network traffic load is addressed.rnHence, the main aim of this thesis is planning of energy efficient Multi-RAT network for arndense urban area and Addis Ababa city is used as a case study. The planning considers that onernsite may have different access technologies with different configuration scenarios, dependingrnon the subscribers and other parameters due to the reason of GSM network is excellent forrncoverage and mostly used for voice service, and UMTS & LTE have less coverage and mostlyrnused for data.

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