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Technological advances in sensing, computation, storage, and communications will turn the near-ubiquitous mobile phone into a global mobile sensing device. People-centric sensing will help drive this trend by enabling a different way to sense, learn, visualize, and share information about ourselves, friends, communities, the way we live, and the world we live in. It juxtaposes the traditional view...
A transmitter in a wireless network that uses CSMA, a simple carrier sensing-based MAC protocol, to determine the likelihood of successful packet reception at the intended receiver can easily be misled. At the same time, CSMA variants and hybrid MAC protocols based at least in part on carrier sensing have become the de facto standard in wireless sensor networks, underscoring a need to improve its...
In a wireless network using CSMA for MAC, packet collisions can result either because of the vulnerability stemming from the idle channel detection delay of the radio device or because of the hidden terminal problem. Both of these collision scenarios can be addressed by applying some additional structure to carrier sense-based channel access, sacrificing throughput to improve collision protection...
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