TECHNICAL PAPER WLAN based energy efficient smart city design Sourav Hati 1 • Prasanjit Dey 1 • Debashis De 1 Received: 23 September 2016 / Accepted: 6 August 2017 Ó Springer-Verlag GmbH Germany 2017 Abstract The rapid growth of new technologies resulted in a new city model, known as the famous ‘‘Smart City’’. The main aim in this paper is to create a paradigm for building an energy efficient smart city. Wireless local area network (WLAN) controller that will be used by the city will be constructed in such a manner that when there will be no request from any node to the access point (AP), the AP will be send from active mode to sleep mode. In Qualnet7.2, with the help of three types of energy model generic, mica z and mica motes the energy consumption in three modes transmit, receive and sleep mode is analysed, where it is seen that energy consumption in sleep mode is much less than in any other modes. In this paper, we propose an algorithm where it is shown that the energy con- sumption in sleep mode is less than in any other modes. 1 Introduction Smart city was developed with the rapid growth of new technologies and innovation processes. To provide them with the best possible facilities IBM brought up the concept of ‘‘Smart City’’ in 2008 which will be able to analyse, sense and integrate the core information regarding the fundamental system in the cities. Cities are noted as the ‘‘engine of economic growth’’ which ensures that the cities function as efficient engines in building the economy of the country (Caragliu et al. 2011). A smart city uses modern technologies and methods to build them further competi- tive, modern, functional and liable. Thus, a smart city connects the social infrastructure, economic infrastructure, institutional infrastructure and physical infrastructure to grasp the collective smartness of the city. The smart cities apply digital technology which will improve the perfor- mance of living, minimize cost and resource consumption to attract citizens more efficiently and effectively. Com- petitiveness, sustainability and capital are the fundamental feature of a smart city. The core idea behind smart city is to collaborate and integrate the information from the urban areas and utilize ICT which include cloud computing, things of Internet and so on. The main characteristics of smart city are scalability, interoperability, limited power consumption, fast deployment, multi-modal access, robustness (Cimmino et al. 2014). A smart city can be viewed as a geographical space which is able to handle resources such as human, building, natural, infrastructure etc. and provide a harmless environment. With the devel- opment of Smart city people can improve their: • Quality of life which includes quality education, safety and security, scopes for participation in governance, ease of seeking public services. • Competitiveness which refers to a cities ability to create opportunities for unemployment people, attract more people towards investments and business policies. • Sustainability involves the environmental sustainabil- ity, social sustainability and financial sustainability. Maulana Abul Kalam Azad University of Technology, West Bengal, was formerly known as West Bengal University of Technology. & Sourav Hati sourav.hati@gmail.com Prasanjit Dey prasanjit.wbut@gmail.com Debashis De dr.debashis.de@gmail.com 1 Department of Computer Science and Engineering, Maulana Abul Kalam Azad University of Technology, BF-142, Sector-1, Kolkata, West Bengal 700064, India 123 Microsyst Technol DOI 10.1007/s00542-017-3530-6