Editing Wireless sensor network (section)

===Localization===
Network localization refers to the problem of estimating the location of wireless sensor nodes during deployments and in dynamic settings. For ultra-low power sensors, size, cost and environment precludes the use of Global Positioning System receivers on sensors. In 2000, Nirupama Bulusu, [[John Heidemann]] and [[Deborah Estrin]] first motivated and proposed a radio connectivity based system for localization of wireless sensor networks.<ref>{{cite journal |last1=Bulusu |first1=Nirupama |last2=Heidemann |first2=John |last3=Estrin |first3=Deborah |title=GPS-less low cost outdoor localization for very small devices |journal=IEEE Personal Communications |year=2000 |volume=7 |issue=5 |pages=28–34 |url=https://ieeexplore.ieee.org/document/878533 |publisher=IEEE Personal Communications, October 2000|doi=10.1109/98.878533 |s2cid=771769 }}</ref> Subsequently, such localization systems have been referred to as range free localization systems, and many localization systems for wireless sensor networks have been subsequently proposed including AHLoS, APS, and Stardust.