Abstract

:. Localization is a fundamental issue of wireless sensor networks. Localization in wide areas remains very challenging due to various interfering factors. Combined & Differentiated Localization approach that exploits the strength of range free approaches and range-based approaches using received signal strength indicator. A critical observation is that ranging quality greatly impacts the overall localization accuracy. To achieve a better ranging quality virtual-hop localization is used. For the first phase of CDL, virtual-hop localization initially computes node locations. This is an enhanced version of hop count- based localization. Virtual-hop particularly addresses the issue of non uniform deployment. The data transfer takes place between the network by using IP address. External Agents an IP-based host. An EA node is a full-fledged computer with full TCP/IP networking stack or IP network. Sensor Nodes provide data that is requested by EA.. It has both IP network stack and DD sensor network capability. Data returned by sensor nodes is also processed and forwarded by gateway node to IP-based hosts. The data transfer between the nodes is not assured full data packet transfer to the destination due to various factors such as heavy load information, source-destination length. To overcome this drawback load balancing algorithm is implemented.

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