Dynamic Sensor Networks动态传感器网络.pptVIP

4 April 2000 M. Jones DSN/Va Tech Query/Tasking at Virginia Tech within the DSN Project Mark Jones ECE Virginia Tech DSN (USC-ISI, UCLA, Virginia Tech) Overview of Query/Tasking Effort @VT Putting queries and query results in context How to make queries within a geographical context (not a query language issue) How to display query results in a meaningful context Interested in both the “soldier-in-the-field” and analyst perspective Can we provide meaningful, detailed geographic data to augment sensor coverage models? Power-efficient tasking of sensor nodes Once a query arrives in the specified area, how do we decide which subset of eligible nodes should handle the query? There may be many possible subsets of nodes that can handle the query Developing and experimenting with algorithms to balance task load, battery status, and coverage area These two tasks are linked by their need for accurate geographical information for the sensor network The Context of Queries We envision that the soldier in the field will make queries and view their results using a map-based display Handheld PDA-like devices Heads-up displays The map-based display must provide enough visual/geographic context for the soldier to Make meaningful queries Be able to make sense of query results that are returned by the sensor network The map-based display must also be able to show the soldier the quality/quantity of sensor net coverage We believe that the remote user case is simpler The Map-Based Display To provide meaningful context in many terrains, the map-based display must be show 3D renderings of the sensor network area Initial 3D images will be static, pre-rendered images that provide information on terrain and large objects (buildings) Next stage will be to provide wireframe views of buildings (such data exists for at least one military urban test site) – the wireframe views will change at the user command (e.g. walkthroughs) Further stages allow for 3D images rendered on-the-fly and for vie