18-09-2012, 03:05 PM
bubble-sensing
bubble.docx (Size: 12.09 KB / Downloads: 37)
ABSTRACT:-
We propose bubble-sensing, a new sensor network abstraction that allows mobile phone users tocreate a binding between sensing tasks and the physical world at locations of interest, thatremains active for a duration set by the user. We envision mobile phones being able to affixsensing task bubbles at places of interest and then receive sensed data as it becomes available ina delay-tolerant fashion, in essence, creating a living documentary of places of interest in the physical world. The system relies on other mobile phones that opportunistically pass through bubble-sensing locations to acquire tasks and do the sensing on behalf of the initiator, and deliver the data to the bubble-sensing server for retrieval by the user who initiated the task.We describe an implementation of the bubble-sensing system using sensor-enabled mobile phones, specifically, Nokia¶s N80 and N95 (with GPS , accelerometers, microphone, camera).Task bubbles are maintained at locations through the interaction of ´bubble carriers´, whichcarry the sensing task into the area of interest, and ´bubble anchors´, which maintain the task bubble in the area when the bubble carrier is no longer present. In our implementation, bubblecarriers and bubble anchors implement a number of simple mobile phone based protocols thatrefresh the task bubble state as new mobile phones move through the area. Phones communicateusing the local Ad-Hoc 802.11g radio to transfer task state and maintain the task in the region of interest. This task bubble state is ephemeral and times out when no bubble carriers or bubbleanchors are in the area. Our design is resilient to periods when no mobiles pass through the bubble area and is capable of µµreloading´ the task into the bubble region.
bubble.docx (Size: 12.09 KB / Downloads: 37)
ABSTRACT:-
We propose bubble-sensing, a new sensor network abstraction that allows mobile phone users tocreate a binding between sensing tasks and the physical world at locations of interest, thatremains active for a duration set by the user. We envision mobile phones being able to affixsensing task bubbles at places of interest and then receive sensed data as it becomes available ina delay-tolerant fashion, in essence, creating a living documentary of places of interest in the physical world. The system relies on other mobile phones that opportunistically pass through bubble-sensing locations to acquire tasks and do the sensing on behalf of the initiator, and deliver the data to the bubble-sensing server for retrieval by the user who initiated the task.We describe an implementation of the bubble-sensing system using sensor-enabled mobile phones, specifically, Nokia¶s N80 and N95 (with GPS , accelerometers, microphone, camera).Task bubbles are maintained at locations through the interaction of ´bubble carriers´, whichcarry the sensing task into the area of interest, and ´bubble anchors´, which maintain the task bubble in the area when the bubble carrier is no longer present. In our implementation, bubblecarriers and bubble anchors implement a number of simple mobile phone based protocols thatrefresh the task bubble state as new mobile phones move through the area. Phones communicateusing the local Ad-Hoc 802.11g radio to transfer task state and maintain the task in the region of interest. This task bubble state is ephemeral and times out when no bubble carriers or bubbleanchors are in the area. Our design is resilient to periods when no mobiles pass through the bubble area and is capable of µµreloading´ the task into the bubble region.