The paper "DV Based Positioning in Ad Hoc Networks" by Dragos Niculescu and Badri Nath addresses the challenge of node positioning in ad hoc networks, particularly in sensor networks with low-powered, low-mobility nodes. The authors propose APS (Ad Hoc Positioning System), a localized, distributed, hop-by-hop positioning algorithm that extends both distance vector routing and GPS positioning. APS aims to provide approximate positions for all nodes in a network where only a limited fraction of nodes have self-positioning capability. The paper discusses the importance of accurate positioning for routing, coordination, and data interpretation in ad hoc networks, especially in scenarios like aircraft sensor deployment and meteorological applications. It highlights the limitations of GPS, such as cost, power consumption, accessibility, and precision, and outlines the requirements for a positioning algorithm, including distribution, minimal node communication, low signaling complexity, and support for disconnected networks. The paper also reviews existing research and presents a detailed explanation of the APS approach, along with simulation results and considerations for node mobility effects.The paper "DV Based Positioning in Ad Hoc Networks" by Dragos Niculescu and Badri Nath addresses the challenge of node positioning in ad hoc networks, particularly in sensor networks with low-powered, low-mobility nodes. The authors propose APS (Ad Hoc Positioning System), a localized, distributed, hop-by-hop positioning algorithm that extends both distance vector routing and GPS positioning. APS aims to provide approximate positions for all nodes in a network where only a limited fraction of nodes have self-positioning capability. The paper discusses the importance of accurate positioning for routing, coordination, and data interpretation in ad hoc networks, especially in scenarios like aircraft sensor deployment and meteorological applications. It highlights the limitations of GPS, such as cost, power consumption, accessibility, and precision, and outlines the requirements for a positioning algorithm, including distribution, minimal node communication, low signaling complexity, and support for disconnected networks. The paper also reviews existing research and presents a detailed explanation of the APS approach, along with simulation results and considerations for node mobility effects.