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US 7,453,396 B2Granted
Radioterminals and associated operating methods that alternate transmission of wireless communications and processing of global positioning system signals
AssigneeATC Technologies, LLC
InventorsLon C. Levin, Peter D. Karabinis
Life of this patent
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Abstract
A radioterminal includes a wireless communications transmitter, a wireless communications receiver and a GPS receiver. A controller is configured to enable the GPS receiver when the wireless communications receiver is receiving wireless communications, and to disable the GPS receiver when the wireless communications transmitter is transmitting wireless communications. Related methods also are described.
Claims23
A radioterminal comprising:
- a wireless communications transmitter;
- a wireless communications receiver;
- a global positioning system (GPS) receiver including a GPS radio frequency (RF) system and a GPS signal processing system;
- and
- a controller that is configured to enable the GPS receiver when the wireless communications receiver is receiving wireless communications and to disable the GPS receiver when the wireless communications transmitter is transmitting wireless communications;
- wherein the controller is further configured to disable the wireless communications transmitter and enable the GPS RF system and the GPS signal processing system to receive and process GPS signals, respectively, when the GPS RF system and the GPS signal processing system have been disabled for a predetermined time, wherein the predetermined time comprises a variable predetermined time, and to send a measure of location of the radioterminal to at least one other radioterminal, wherein an identity of the radioterminal is used to determine the at least one other radioterminal and the measure of location of the radioterminal is sent to the at least one other radioterminal responsive to a change of position of the radioterminal and responsive to a rate of change of position of the radioterminal.
3 more elements
A radioterminal comprising:
- a wireless communications transmitter;
- a wireless communications receiver;
- a global positioning system (GPS) receiver including a GPS radio frequency (RF) systemand a GPS signal processing system;
- and
- a controller that is configured to switch the radioterminal between a first mode, wherein the GPS RF system and the GPS signal processing system are disabled and the wireless communications transmitter is enabled, and a second mode, wherein the GPS RF system and the GPS signal processing system are enabled to receive and process GPS signals, respectively, and the wireless communications transmitter is disabled;
- wherein the controller is further configured to switch the radioterminal to the second mode when the radioterminal has been in the time, wherein the redetermined time comprises a variable predetermined time, and to send a measure of location of the radioterminal to at least one other radioterminal, wherein an identity of the radioterminal is used to determine the at least one other radioterminal and the measure of location of the radioterminal is sent to the at least one other radioterminal responsive to a change of position of the radioterminal and responsive to a rate of change of position of the radioterminal.
3 more elements
A method of operating a radioterminal that includes awireless communications transmitter, a wireless communications receiver, and a globalpositioning system (GPS) receiver including a GPS radio frequency (RF) system and a GPS signal processing system, the method comprising:
- switching the radioterminal between a first mode, wherein the GPS RF system and the GPS signal processing system are disabled and the wireless communications transmitter is enabled, and a second mode, wherein the GPS RF system and the GPS signal processing system are enabled to receive and process GPS signals, respectively, and the wireless communications transmitter is disabled;
- switching the radioterminal to the second mode when the radioterminal has been in thefirst mode for a predetermined time, wherein the predetermined time comprises a variablepredetermined time;
- and
- sending a measure of location of the radioterminal to at least one other radioterminal, wherein an identity of the radioterminal is used to determine the at least one other radioterminal and the measure of location of the radioterminal is sent to the at least one other radioterminal responsive to a change of position of the radioterminal and responsive to a rate of change of position of the radioterminal.
1 more element
Dependencies are inferred from the claim text.