| 摘要 |
Techniques for using wireless devices to implement sensor networks are de scribed. For cognitive radio, a wireless device obtains measurements for a f irst system (e.g., a broadcast system) with which the wireless device is not in communication. The wireless device sends the measurements and associated location information and/or timestamps via a second system (e.g., a cellula r system). A server receives measurements from a number of wireless devices and determines the coverage of the first system based on the measurements. F or other applications, a wireless device obtains sensor information from at least one sensor at the wireless device and sends the sensor information and associated location information and/or timestamps via a wireless system. A server receives the sensor information and associated information from a num ber of wireless devices, aggregates the sensor information, and constructs a map. The wireless device may develop a user profile based on the sensor inf ormation and associated information. |
