IJMIE Volume 2, Issue 7 ISSN: 2249-0558 ___________________________________________________________ A Monthly Double-Blind Peer Reviewed Refereed Open Access International e-Journal - Included in the International Serial Directories Indexed & Listed at: Ulrich's Periodicals Directory ©, U.S.A., Open J-Gage as well as in Cabell’s Directories of Publishing Opportunities, U.S.A. International Journal of Management, IT and Engineering http://www.ijmra.us 390 July 2012 STRATEGIES OF DATA COLLECTION IN TREE- BASED WIRELESS SENSOR NETWORKS NITA V. JAISWAL* VISHAL S. DHOLE* PROF. D.M.DAKHANE** HARSHAL N. DATIR*** __________________________________________________________ ABSTRACT: Data collection is a fundamental operation in wireless sensor networks where sensor nodes measure attributes about a phenomenon of interest and transmits their readings to a common base station. We classify the algorithms according to their common design objectives, identifying the following four as the most fundamental and most studied with respect to data collection in WSNs: (i) minimizing schedule length, (ii) minimizing latency, (iii) minimizing energy consumption. We explore and evaluate a number of different techniques using realistic simulation models under the many-to-one communication paradigm known as convergecast. In sensor networks data are transferred from the sensor nodes to a few central data collectors. Index Terms—Convergecast, TDMA Scheduling algorithm., multiple channels * M.E.(first year in computer Engg.), Sipna College of Engg. & Technolgy, Amravati. ** Assist Professor (Computer Sci &Engg), Sipna College of Engg. & Technology, Amravati *** Lecturer in Computer Science & Enginnering and Information Technology Dept, Sipna College of Engg. & Technology, Amravati.