Toward Optimal Cost-Energy Management Green Framework for Sustainable Future Wireless Networks

The design of green cellular networking according to the trafc arrivals has the capability to reduce the overall energy consumption to a cluster in a cost-effective way.The cell zooming approach has appealed much attention that adaptively ofoads the BS load demands adjusting the transmit power based on the trafc intensity and green energy availability.Besides,the researchers are focused on implementing renewable energy resources,which are considered the most attractive practices in designing energy-efcient wireless networks over the long term in a cost-efcient way in the existing infrastructure.The utilization of available solar can be adapted to acquire cost-effective and reliable power supply to the BSs,especially that sunlight is free,available everywhere,and a good alternative energy option for the remote areas.Nevertheless,planning a photovoltaic scheme necessitates viability assessment to avoid poor power supply,particularly for BSs.Therefore,cellular operators need to consider both technical and economic factors before the implementation of solar-powered BSs.This paper proposed the usercentric cell zooming policy of solar-powered cellular base stations taking into account the optimal technical criteria obtained by the HOMER software tool.The results have shown that the proposed system can provide operational expenditure(OPEX)savings of up to 47%.In addition,the efcient allocation of resource blocks(RBs)under the cell zooming technique attain remarkable energy-saving performance yielding up to 27%.

HOW DO GREEN BUILDINGS COMMUNICATE GREEN DESIGN TO BUILDING USERS?A SURVEY STUDY OF A LEED-CERTIFIED BUILDING

Studies investigating the benefits of green buildings can be approached by the affor-dance theory-the perceived properties of a thing that determine how it could pos-sibly be used.This study focuses on the sustainable communication and education that a green building should provide.By applying the affordance theory,we examined whether a LEED-certified university campus building effectively communicates green design and sustainability to its users and if so,then how?We employed a question-naire survey targeting campus users of a LEED-certified building by examining their awareness of the building’s LEED status and perception of green design elements at multiple spatial scales,as well as their general knowledge on green building topics.We collected 177 questionnaires,of which 153 were qualified for statistical analysis.The results suggested that the building itself can afford to promote awareness among users,but cannot afford to educate users on general green building knowledge.We found that building users perceived green design at different spatial scales,preferring either product or space-related design.Our results indicate that future design should continue promoting the use of educational signage,which was found to be the most effective communicator of sustainability.The communication of green design to users with different spatial preferences remains a future research focus.Further studies on the innovative use of green building design as effective communicators are needed to promote sustainability education among the building users.