This dissertation addresses three important problems in wireless ad hoc and sensor networks. The subject of wireless ad hoc and sensor networks is identified as one of the most important areas of research for future wireless systems. The robustness, flexibility, and adaptability of these self-organizing networks unleash unprecedented opportunities for a wide spectrum of applications. In addition, wireless sensor networks provide information around our daily lives as well as information about the physical environment at a finer granularity, yet at a larger scale than has been possible before. Wireless ad hoc and sensor networks are changing the way we perceive and share information of all kinds. This thesis addresses three important problems in wireless ad hoc and sensor networks, i.e., (1) service differentiation, (2) the funneling problem, and (3) the mobile tracking problem. To solve these problems, this thesis presents three information-driven systems, which are MetroTrack, Funneling-MAC, and SWAN. Although the three systems address three different problems in different contexts, they share a fundamental design principle, namely information-driven principle, in that the systems utilize the information of the dynamic environment that may affect the performance and robustness of the networks. Wireless ad hoc and sensor network
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