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Event-driven sensor networks operate under an idle or light load and then suddenly become active in response to a detected or monitored event. The transport of event impulses is likely to lead to varying degrees of congestion in the network depending on the sensing application. It is during these periods of event impulses that the likelihood of congestion(More)
We propose <i>PSFQ (Pump Slowly, Fetch Quickly</i>), a reliable transport protocol suitable for a new class of reliable data applications emerging in wireless sensor networks. For example, currently sensor networks tend to be application specific and are typically hard-wired to perform a specific task efficiently at low cost; however, there is an emerging(More)
Wireless access to Internet services will become typical, rather than as it is today, the exception. Such a vision presents great demands on mobile networks. Mobile IP represents a simple and scalable global mobility solution but lacks support for fast handoo control and paging found in cellular telephony networks. In contrast, second and third generation(More)
There is a critical need for new thinking regarding overload traffic management in sensor networks. It has now become clear that experimental sensor networks (e.g., mote networks) and their applications commonly experience periods of persistent congestion and high packet loss, and in some cases even congestion collapse. This significantly impacts(More)
We present a performance comparison of a number of key micro-mobility protocols that have been discussed in the IETF Mobile IP Working Group over the past several years. IP micro-mobility protocols complement Mobile IP by offering fast and seamless handoff control in limited geographical areas and IP paging in support of scalability and power conservation.(More)
— There is a growing need to support reliable data communications in sensor networks that are capable of supporting new applications, such as, assured delivery of high priority events to sinks, reliable control and management of sensor networks, and remotely programming/re-tasking sensor nodes over-the-air. We present the design, implementation, and(More)
As wireless devices and sensors are increasingly deployed on people, researchers have begun to focus on wireless body-area networks. Applications of wireless body sensor networks include healthcare, entertainment, and personal assistance, in which sensors collect physiological and activity data from people and their environments. In these body sensor(More)
There is a critical need for new thinking regarding overload traffic management in sensor networks. It has now become clear that experimental sensor networks (e.g., mote networks) and their applications commonly experience periods of persistent congestion and high packet loss, and in some cases even congestion collapse. This significantly impacts(More)