Spread spectrum wireless communication and monitoring arrangement and method
DCFirst Claim
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1. A monitoring system, comprising:
- a central device and monitoring devices having wireless communication therebetween, each of the devices including a wireless communication circuit to effect wireless communications between the central device and the monitoring devices,the central device and at least one of the monitoring devices to effect wireless communications therebetween by using communication intervals to define communication therebetween and a sequence of multiple frequencies for communicating between the central device and said at least one monitoring device;
the central device and said at least one monitoring device configured for synchronizing communications with one another based on the communication intervals and at least a selected one of the multiple frequencies that represents a starting transmission frequency;
at least one of the central device and said at least one monitoring device configured for reducing power consumption therein as a function of a transmission anticipation time calculated from the communication intervals, the number of frequencies in the sequence of multiple frequencies that are between a receiving frequency of the multiple frequencies that is different from said selected one of the multiple frequencies and said selected one of the multiple frequencies; and
wherein said at least one of the devices relies on a limited power source and the central device collects monitoring data from the monitoring devices while mitigating power consumption from the limited power source.
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Abstract
A method and system for wireless monitoring is implemented in a variety of embodiments. In one such embodiment, a monitoring system method is implemented for, wireless communication between a central device and monitoring devices. Each of the devices includes a wireless communication circuit to effect wireless communications. Power consumption from a limited power source is reduced at least one of the wireless communication circuits based upon a communications time interval and a selected channel for communication between the central device and a monitor device to effect wireless communications between the central device and the monitor device.
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Citations
26 Claims
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1. A monitoring system, comprising:
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a central device and monitoring devices having wireless communication therebetween, each of the devices including a wireless communication circuit to effect wireless communications between the central device and the monitoring devices, the central device and at least one of the monitoring devices to effect wireless communications therebetween by using communication intervals to define communication therebetween and a sequence of multiple frequencies for communicating between the central device and said at least one monitoring device; the central device and said at least one monitoring device configured for synchronizing communications with one another based on the communication intervals and at least a selected one of the multiple frequencies that represents a starting transmission frequency; at least one of the central device and said at least one monitoring device configured for reducing power consumption therein as a function of a transmission anticipation time calculated from the communication intervals, the number of frequencies in the sequence of multiple frequencies that are between a receiving frequency of the multiple frequencies that is different from said selected one of the multiple frequencies and said selected one of the multiple frequencies; and wherein said at least one of the devices relies on a limited power source and the central device collects monitoring data from the monitoring devices while mitigating power consumption from the limited power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. For use in a monitoring system, a method for wireless communication between a central device and monitoring devices, each of the devices including a wireless communication circuit to effect wireless communications between the central device and the monitoring devices, the method comprising:
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to effect wireless communications between the central device and at least one of the monitoring devices, providing communication intervals to define communication therebetween, and a selected one of a sequence of multiple frequencies for communicating between the central device and said at least one monitoring device; communicating between the central device and said at least one monitoring device based on the communication intervals and at least said selected one of the multiple frequencies; and reducing power consumption of a reduced power mode, in at least one of the central device and said at least one monitoring devices as a function of the communication intervals and said selected one of the multiple frequencies, including reducing an amount of time that the at least one of the central device and said at least one monitoring device actively listens for data transmitted using the sequence of multiple frequencies, by reducing a number of communication intervals during which the at least one monitoring device actively listens to less than a number of frequencies in the multiple frequencies; and wherein said at least one of the devices relies on a limited power source and the central device collects monitoring data from the monitoring devices while mitigating power consumption from the limited power source. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. For use in a monitoring system, a method for wireless communication between a central device and monitoring devices, each of the devices including a wireless communication circuit to effect wireless communications between the central device and the monitoring devices, the method comprising:
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to effect wireless communications between the central device and at least one of the monitoring devices, providing communication intervals to define communication therebetween, and a selected one of a sequence of multiple frequencies for communicating between the central device and said at least one monitoring device; communicating between the central device and said at least one monitoring device based on the communication intervals and at least said selected one of the multiple frequencies; and reducing power consumption of a reduced power mode, in at least one of the central device and said at least one monitoring device as a function of the communication intervals and said selected one of the multiple frequencies, including reducing an amount of time that the at least one of the central device and said at least one monitoring device actively listens for data transmitted using the sequence of multiple frequencies; wherein said at least one of the devices relies on a limited power source and the central device collects monitoring data from the monitoring devices while mitigating power consumption from the limited power source; and transmitting messages between the devices wherein the messages use a short frame and a long frame; and transmitting the long frames in packets that contain a number of frames that is an integer multiple of the number of different frequencies of said multiple frequencies.
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26. For use in a monitoring system, a method for bidirectional wireless communication between a central device and monitoring devices, each of the devices including a wireless communication circuit to effect wireless communications between the central device and the monitoring devices, the method comprising:
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wirelessly sending synchronization information between the central device and at least one of the monitoring devices; using a selected channel for communication between the central device and said at least one of the monitoring devices to effect wireless communications between the central device and said at least one of the monitoring devices, the selected channel used to effect approximately even utilization of a sequence of channels by selecting the channel according to a last communication channel used to communicate between the central device and the at least one of the monitoring devices; reducing the power consumption of at least one of the wireless communication circuits by coordinating a communications time interval and the selected channel using the location of the selected channel within sequence of channels to calculate the communications time interval; and wherein the sequence of channels is used for wireless communications between the central device and the monitoring devices and said at least one of the devices relies on a limited power source and the central device collects monitoring data from the monitoring devices while mitigating power consumption from the limited power source.
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Specification