TinyDB and TASK. Sensor Network in a Box SMARTER SENSORS IN SILICON 1

Transcription

1 TinyDB and TASK Sensor Network in a Box SMARTER SENSORS IN SILICON 1

2 Overview What is TinyDB? A query processing system for extracting information from a network of TinyOS sensors. Requires no embedded C programming. Provides simple, SQL-like interface to specify the data you want to extract. Contains Sensor Network software and a Javabased Client Interface SMARTER SENSORS IN SILICON 2

3 Overview What is TASK? Tiny Application Sensor Kit Sensor Network in a box Break the barrier to entry to sensor network applications for non-computer scientists Provide an end-to-end software suite for rapid sensor network deployment Targetted towards actual users of sensor networks SMARTER SENSORS IN SILICON 3

4 Goals No mote coding Focus on low rate data collection applications, such as habitat monitoring Single integrated package with minimal configuration Easy integration with popular analysis tools Scaling: up to 100 nodes Longevity: 6 months at 1-2% duty cycle (Now) 12 months (in development) SMARTER SENSORS IN SILICON 4

5 Features of TinyDB Metadata Management Provides a metadata catalog High Level Queries Using a declarative query language Network Topology TinyDB manages the underlying radio network Multiple Queries Queries can have different sample rates Incremental Deployment via Query Sharing To expand your sensor network, simply download TinyDB code to new motes SMARTER SENSORS IN SILICON 5

6 Data Collection Applications Botonical Gardens Redwood Trees Habitat Monitoring at Great Duck Island SMARTER SENSORS IN SILICON 6

7 TinyDB Size ~10,000 Lines of Embedded C Code ~5,000 Lines of (PC-Side) Java ~3200 Bytes RAM (w/ 768 byte heap) ~58 kb compiled code SMARTER SENSORS IN SILICON 7

8 TinyDB Query Processor Multiple Simultaneous Declarative Queries In Network Query Sensor Query: SELECT nodeid, humidity, temp FROM sensors SAMPLE PERIOD 8000 Health Query: SELECT nodeid, parent, depth, voltage FROM sensors SAMPLE PERIOD SMARTER SENSORS IN SILICON 8

9 TinyDB Query Processor In-network filtering and aggregation Of sensor attributes Routing layer abstraction: Multihop and broadcast (multiple implementations available, ex. MintRoute) Power Management Only wake up for a fraction of each sample period SMARTER SENSORS IN SILICON 9

10 TinyDB Query Processor TimeSync keeps sample periods aligned across nodes Catalog layer provides a variety of sensor attributes for Mica2 and Mica2Dot SMARTER SENSORS IN SILICON 10

11 Declarative Queries Find the sensors in bright nests Query SELECT nodeid, nestnum, light FROM sensors WHERE light > 400 EPOCH DURATION 1s Epoch NodeId NestNum Light SMARTER SENSORS IN SILICON 11

12 Aggregate Queries Count the number of occupied nests in each loud region of the island Query SELECT region, CNT(occupied, AVG(sound) FROM sensors GROUP BY region HAVING AVG(sound) > 200 EPOCH DURATION 10s Epoch Region CNT(...) AVG(...) 0 North North South South SMARTER SENSORS IN SILICON 12

13 TASK Components TinyDB based sensor network TASK Server a server process running on a sensor network gateway TASK DBMS a relational DBMS, that serves as a repository for sensor readings. Currently PostgreSQL. TASK Client tools TASK Deployment Tool record Mote placement TASK Configuration Tool Query Design and Filtering/Aggregation SMARTER SENSORS IN SILICON 13

14 TASK Components (contd.) TASK Visualization Tool monitor sensor readings and network health TASK Field Tool Runs on a PDA that helps users diagnose and resolve problems in the field SMARTER SENSORS IN SILICON 14

15 TASK Client Deployment Import Outline or Layout SMARTER SENSORS IN SILICON 15

16 TASK Client Configuration Edit Configuration SMARTER SENSORS IN SILICON 16

17 TASK Client Query Select Attributes Select Sampling period Build Sensor Query Build Health Query Start/Stop Query SMARTER SENSORS IN SILICON 17

18 TASK Client Visualization Cursor View Latest values of sensors Moving cursor to a node will display its latest sensor readings SMARTER SENSORS IN SILICON 18

19 TASK Client Visualization Graphical Output of a Query SMARTER SENSORS IN SILICON 19

20 TinyDB/TASK Architecture External Tools TASK Client Tools Internet DBMS ODBC/ JDBC Basestation Stargate Task Server Sensor Network SMARTER SENSORS IN SILICON 20

21 TinyDB/TASK Architecture TASK Mote Side Components TinyDB Diagnostics TinySchema Watchdog EEPROM FS Power Mgmt. Multihop routing Service Scheduler Time Sync Abs Timer Tiny OS Core SMARTER SENSORS IN SILICON 21

22 Tiny Aggregation(TAG) TinySQL supports these aggregates MIN, MAX, SUM, COUNT, AVERAGE In-network processing of aggregates Common Data Analysis Operation That is, gather operation or reduction in parallel programming Across nodes during each epoch Reference: Madden, Franklin, Hellerstein, Hong. Tiny AGgregation (TAG) OSDI SMARTER SENSORS IN SILICON 22

23 Future Work In Development High Data Rates (logging and transfer) More sophisticated deployment tool Failover of TASKServer and DBMS Web-based client tools Network monitoring alerts In Research Unify live and historic data Heterogenous Sensor Networks Beyond data collection - actuation SMARTER SENSORS IN SILICON 23

24 More Information TinyDB tinyos-1.x/doc/tinydb.pdf TASK tinyos-1.x/doc/task.pdf SMARTER SENSORS IN SILICON 24

25 Demo SMARTER SENSORS IN SILICON 25

26 Q & A SMARTER SENSORS IN SILICON 26