Indexing sensor data

摘要

In particular embodiments, a method includes, from an indexer in a sensor network, accessing a set of sensor data that includes sensor data aggregated together from sensors in the sensor network, one or more time stamps for the sensor data, and metadata for the sensor data identifying one or more pre-determined attributes of the sensor data. The method includes, at the indexer, generating an index of the set of sensor data according to a multi-dimensional array configured for querying of the set of sensor data along with a plurality of other sets of sensor data. One or more first ones of the dimensions of the multi-dimensional array include time, and one or more second ones of the dimensions of the multi-dimensional array include one or more of the pre-determined sensor-data attributes. The method includes, from the indexer, communicating the index of the set of sensor data for use in responding to one or more queries of the set of sensor data along with a plurality of other sets of sensor data.

主权项

1. A method comprising, by one or more computer systems:
from an indexer in a sensor network, accessing a set of sensor data that comprises:
a plurality of sensor data aggregated together from a plurality of sensors in the sensor network;one or more time stamps for the sensor data; andmetadata for the sensor data identifying one or more pre-determined attributes of the sensor data; at the indexer,
generating an index of the set of sensor data according to a multi-dimensional array configured for querying of the set of sensor data along with a plurality of other sets of sensor data, one or more first ones of the dimensions of the multi-dimensional array comprising time and one or more second ones of the dimensions of the multi-dimensional array comprising one or more of the pre-determined sensor-data attributes;classifying the sensor data;based on the classification, generating keywords for the sensor data using the metadata;forming a keyword frequency distribution by combining the keywords for different time windows; andsummarizing the sensor data by eigenvalues of an array associated with the sensor data in a keyword space and generating, using the eigenvalues, a set of searchable sensor data that represents the sensor data and has a smaller size than the sensor data; and from the indexer, communicating the index of the set of sensor data in response to one or more queries of the set of sensor data along with a plurality of other sets of sensor data, and wherein generating the index comprises inputting the sensor data to a state machine with programmable rule criteria that is configured to drop sensor data that fail to meet the rule criteria as programmed.