Dual Mode Wireless Communications Device
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless communications device includes a battery, a processing section coupled to the battery, and an RF interface. The battery is configured to provide power to operate the wireless communications device in a first mode of operation. The processing section is configured to operate on battery power in the first mode of operation. The RF interface is configured to receive an RF signal and generate operating power for the wireless communication device from the RF signal in a second mode of operation. The wireless communications device is configured to detect available RF power and enter the second mode of operation from the first mode of operation.
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Citations
50 Claims
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1-30. -30. (canceled)
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31. A wireless communications device comprising:
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a battery configured to provide power to operate the wireless communications device in a first mode of operation; an RF interface configured to; receive an RF signal; and generate operating power for direct use by the wireless communications device from the RF signal in a second mode of operation; and one or more processors configured to; operate the wireless communications device using battery power in the first mode of operation; detect available RF power; and enter the second mode of operation from the first mode of operation, wherein, during the second mode of operation, the generated operating power is used immediately for operation of the device.
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32. The wireless communications device of claim 31, wherein the wireless communications device is configured such that the processing section enters a sleep mode in the second mode of operation, and the wireless communications device is further configured to detect a fill state of a memory and based on the fill state change the processing section from the sleep mode to an active mode and conduct data transfer with the memory.
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33. The wireless communications device of claim 32, wherein the RF interface is configured to receive data from the RF signal in the second mode of operation and the wireless communications device is configured to store the data in the memory.
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34. The wireless communications device of claim 31, wherein the RF interface is configured to modulate the RF signal and provide backscatter communication with a source of the RF signal.
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35. The wireless communications device of claim 32, wherein the wireless communications device is configured to read data from the memory and provide an output message to a source of the RF signal by modulating the RF signal.
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36. A method comprising:
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operating a wireless communications device in a first mode of operation using operating power supplied by a battery connected to the wireless communications device; detecting presence of an RF signal; entering a second mode of operation; and generating operating power from the RF signal for direct use by the wireless communications device, wherein the generated operating power is used immediately for operation of the device.
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37. The method of claim 36, further comprising:
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detecting that a storage level of a memory has reached a limit; and changing a processor of the wireless communications device from an inactive state to an active state.
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38. The method of claim 37, further comprising:
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extracting data from the RF signal in the wireless communications device in the second mode of operation; and storing the data in the memory in the wireless communications device.
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39. The method of claim 38, further comprising moving data from the memory using the processor.
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40. The method of claim 37, further comprising reading data from the memory and providing an output message from the wireless communications device by modulating the RF signal.
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41. The method of claim 36, further comprising modulating the RF signal by the wireless communications device to provide backscatter communication with a source of the RF signal.
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42. The method of claim 41, wherein modulating the RF signal includes modulating the RF signal with identification data of the wireless communications device.
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43. The method of claim 42, wherein the source of the RF signal is a base station having at least one network connection, and wherein the method further comprises receiving the identification data at the base station and providing the identification data to at least one remote device over the network connection.
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44. The method of claim 43, further comprising receiving at the base station from a remote device over the network connection a message for the wireless communications device, and modulating the RF signal to provide the message to the wireless communications device.
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45. The method of claim 41, wherein the source of the RF signal is a base station having at least one network connection, and wherein the method further comprises receiving data from the wireless communications device at the base station and providing the data to a remote device over the network connection.
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46. A wireless communication system comprising:
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a base station having at least one network connection and an RF transceiver configured to generate an RF signal and communicate using backscatter communication; and a wireless device comprising; a battery configured to provide power to operate the wireless device in a first mode of operation; a processing section coupled to the battery and configured to operate on battery power in the first mode of operation; and an RF interface configured to receive the RF signal from the base station and generate operating power for direct use by the wireless device from the RF signal in a second mode of operation, wherein, in the second mode of operation, the generated operating power is used immediately for operation of the device; wherein the wireless device is configured to detect available RF power and enter the second mode of operation from the first mode of operation.
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47. The system of claim 46, wherein the wireless device is configured such that the processing section enters a sleep mode in the second mode of operation, configured to read data from the memory and provide an output message to the base station by modulating the RF signal, and further configured to detect a fill state of a memory and based on the fill state change the processing section from the sleep mode to an active mode and conduct data transfer with the memory.
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48. The system of claim 46, wherein the RF interface is configured to modulate the RF signal with identification data of the wireless device in order to provide data to the base station.
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49. The system of claim 48, wherein the base station is configured to receive the identification data and provide the identification data to at least one remote device over the network connection.
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50. The system of claim 49, wherein the base station is further configured to receive from a remote device over the network connection a message for the wireless device, and modulate the RF signal to provide the message to the wireless device.
Specification