Remote sensor interface (RSI) having power conservative transceiver for transmitting and receiving wakeup signals

• US 7,539,520 B2
• Filed: 06/19/2006
• Issued: 05/26/2009
• Est. Priority Date: 06/17/2005
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: TeraHop Networks Incorporated
• Inventors: Twitchell, Jr., Robert W.
• Primary Examiner(s): TRINH, TAN H
• Application Number:
  US11/425,040
• Publication Number:
  US 20060287008A1
• Time in Patent Office: 1,072 Days
• Field of Search: None
• US Class Current: 455/574
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A device for receiving and transmitting wireless signals includes a transceiver capable of receiving a wireless signal; and a standards-based radio capable of activation thereof in response to a reception of a wireless signal by the transceiver. The transceiver includes a receiver capable of receiving a wireless signal transmitted to prompt activation of said standards-based radio; and a transmitter configured, in response to a reception by said receiver of a wireless signal transmitted to prompt activation of said standards-based radio, to selectively transmit a wireless signal for another transceiver to prompt activation of another standards-based radio.

Claims

1. A wireless data communication device, comprising:

(a) a radio configured to power down to conserve energy and to power up in response to receipt of a wired electronic signal, the radio comprising a first receiver and a first transmitter;

(b) a wake-up transceiver comprising a second transmitter and a second receiver, the wake-up transceiver configured to,

(i) screen radio frequency broadcasts, received by the second receiver, for specific data therein that identifies the radio frequency broadcast as a wake-up signal,

(ii) provide the wired electronic signal to the radio in order to power up the radio upon receipt, by the second receiver, of a wake-up signal, and

(iii) transmit radio frequency broadcasts, using the second transmitter, that include specific data therein that identifies the radio frequency broadcasts as wake-up signals; and

(c) a power source for powering at least one of the radio and the wake-up transceiver;

(d) wherein the second receiver of the wake-up transceiver is configured to draw less current than the first receiver of the radio while screening radio frequency broadcasts for specific data therein that identifies the radio frequency broadcast as a wake-up signal; and

(e) wherein the second transmitter of the wake-up transceiver is configured to draw less current than the first transmitter of the radio when transmitting radio frequency broadcasts that include specific data therein that identifies the radio frequency broadcasts as wake-up signals.

2. The wireless data communication device of claim 1, wherein the wake-up transceiver is configured to transmit radio frequency broadcasts, using the second transmitter, when the radio is powered down.

3. The wireless data communication device of claim 1, further comprising a sensor associated with the wireless data communication device.

4. The wireless data communication device of claim 3, wherein the wake-up transceiver is configured to transmit signals that include data acquired from the sensor, using the second transmitter, when the radio is powered down.

5. The wireless data communication device of claim 4, wherein the wake-up transceiver is configured to activate the sensor for taking readings when the radio is powered down.

6. The wireless data communication device of claim 5, wherein the sensor is a component of the wireless data communication device.

7. The wireless data communication device of claim 3, wherein the radio is configured to transmit signals that include data acquired from the sensor, using the first transmitter, when the radio is powered up.

8. The wireless data communication device of claim 7, wherein the sensor is a component of the wireless data communication device.

9. The wireless data communication device of claim 3, further comprising a protective housing within which are contained the radio, the wake-up transceiver, the sensor, and the power source.

10. The wireless data communication device of claim 3, wherein the power source powers the radio and the sensor, and further comprising a second power source configured to power the wake-up transceiver.

11. The wireless data communication device of claim 10, wherein the radio and the wake-up transceiver are contained on a printed circuit board (PCB), and wherein the PCB further comprises a sensor interface through which data is received from the sensor.

12. The wireless data communication device of claim 1, wherein the radio comprises a standards-based radio that communicates using a first protocol, and wherein the wake-up transceiver communicates using a second, different protocol.

13. An apparatus comprising:

(a) a shipping container;

(b) a remote sensor interface(RSI) attached to the shipping container, the RSI comprising a protective housing containing,

(i) a radio configured to power down to conserve energy and to power up in response to receipt of a wired electronic signal, the radio comprising a first receiver and a first transmitter,

(ii) a wake-up transceiver comprising a second transmitter and a second receiver, the wake-up transceiver configured to,

(A) screen radio frequency broadcasts, received by the second receiver, for specific data therein that identifies the radio frequency broadcast as a wake-up signal,

(B) provide the wired electronic signal to the radio in order to power up the radio upon receipt, by the second receiver, of a wake-up signal, and

(C) transmit radio frequency broadcasts, using the second transmitter, that include specific data therein that identifies the radio frequency broadcasts as wake-up signals, and

(iii) a power source configured to power at least one of the radio and the wake-up transceiver,

(iv) wherein the second receiver of the wake-up transceiver is configured to draw less current than the first receiver of the radio while screening radio frequency broadcasts for specific data therein that identifies the radio frequency broadcast as a wake-up signal, and

(v) wherein the second transmitter of the wake-up transceiver is configured to draw less current than the first transmitter of the radio when transmitting radio frequency broadcasts that include specific data therein that identifies the radio frequency broadcasts as wake-up signals, and

(c) at least one sensor with which the RSI is configured to receive data for transmitting from the shipping container to a network external to the shipping container, the sensor configured to acquire data pertaining to at least one of an environmental characteristic, status, and geographical location of the shipping container;

(d) whereby at least one of an environment characteristic, status, and geographical location of the shipping container may be remotely monitored.

14. The apparatus of claim 13, wherein the at least one sensor is contained within the protective housing of the RSI and is powered by the power source contained within the protective housing.

15. The apparatus of claim 13, wherein the at least one sensor is externally located to the protective housing of the RSI.

16. The apparatus of claim 15, wherein the at least one sensor is configured to wirelessly communicate with the RSI.

17. The apparatus of claim 15, wherein the at least one sensor is configured to communicate with the RSI through a wired connection.

18. The apparatus of claim 13, wherein the at least one sensor comprises at least one of an electronic seal for monitoring a door of the shipping container, a magnetic seal for monitoring a door of the shipping container, a camera, a microphone, a temperature sensor, a humidity sensor, a radiation sensor, a motion sensor, a radio frequency signal detector, and a global positioning system (GPS) receiver.

19. A remote sensor network for monitoring shipping containers, comprising:

(a) a first plurality of shipping containers, each shipping container including,

(i) a remote sensor interface(RSI) attached to the shipping container, the RSI comprising a protective housing containing,

(A) a radio configured to power down to conserve energy and to power up in response to receipt of a wired electronic signal, the radio comprising a first receiver and a first transmitter,

(B) a wake-up transceiver comprising a second transmitter and a second receiver, the wake-up transceiver configured to,

(1) screen radio frequency broadcasts, received by the second receiver, for specific data therein that identifies the radio frequency broadcast as a wake-up signal,

(2) provide the wired electronic signal to the radio in order to power up the radio upon receipt, by the second receiver, of a wake-up signal, and

(3) transmit radio frequency broadcasts, using the second transmitter, that include specific data therein that identifies the radio frequency broadcasts as wake-up signals, and

(B) a power source configured to power at least one of the radio and the wake-up transceiver,

(C) wherein the second receiver of the wake-up transceiver is configured to draw less current than the first receiver of the radio while screening radio frequency broadcasts for specific data therein that identifies the radio frequency broadcast as a wake-up signal, and

(D) wherein the second transmitter of the wake-up transceiver is configured to draw less current than the first transmitter of the radio when transmitting radio frequency broadcasts that include specific data therein that identifies the radio frequency broadcasts as wake-up signals, and

(ii) at least one sensor with which the RSI is configured to receive data for transmitting from the shipping container to a network external to the shipping container, the sensor configured to acquire data pertaining to at least one of an environmental characteristic, status, and geographical location of the shipping container;

(b) gateways configured to transmit wakeup signals to the respective RSIs of the shipping containers for communications therewith, each gateway further configured to communicate over at least one of the Internet, a cellular network, and a satellite network; and

(c) a server configured to communicate with each gateway over at least one of the Internet, a cellular network, and a satellite network for receiving and processing sensor acquired data from the shipping containers communicated by the RSIs, whereby at least one of an environment characteristic, status, and geographical location of each shipping container may be remotely monitored.

20. The remote sensor network of claim 19, wherein each gateway is configured to transmit a signal other than a wake-up signal to RSIs of the shipping containers, and wherein each respective wake-up transceiver of the RSIs is configured to receive a signal other than a wake-up signal transmitted by a gateway when the radio of the respective RSI is powered down and respond thereto without causing the radio of the respective RSI to power up.