Sync Interval Determination
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Accused Products
Abstract
The invention relates to a method of synchronizing clocks of at least two devices in a network and a corresponding wireless device for synchronizing its clock with another wireless device. The method comprises steps of: transmitting a synchronization signal to said at least one second device to determine at least one time offset between a clock of the first device and at least one clock associated with said at least one second device; receiving said at least one time offset from said at least one second device; determining a time interval for the first device based on a time offset parameter corresponding to said at least one time offset, after which time interval the first device transmits a next synchronization signal to said at least one second device. With this method, the radio station is able to reduce its power consumption when the time offset between the first device and the second device is small.
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Citations
24 Claims
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1-12. -12. (canceled)
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13. A method for synchronizing a first device with at least one second device, comprising steps of:
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transmitting a synchronization signal to said at least one second device to determine at least one time offset between a clock of the first device and at least one clock associated with said at least one second device; receiving said at least one time offset from said at least one second device; determining a time interval for the first device based on a time offset parameter corresponding to said at least one time offset, after which time interval the first device transmits a next synchronization signal to said at least one second device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 24)
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22. A synchronization method for synchronizing a first device with a second device, comprising the steps of:
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transmitting a synchronization signal from a first device to a second device; transmitting a follow up message from the first device to the second device, indicating a first time point of transmitting the synchronization signal; transmitting a request message from the second device to the first device; transmitting a response message from the first device to the second device to inform the forth time point of receiving said request message at said first device; determining at least one time offset between a clock of the first device and a clock associated with said second device according to the first time point, a second time point of receiving said synchronization signal at the second device, a third time point of transmitting said request message, and the forth time point; receiving said at least one time offset from said second device; and determining a time interval for the first device based on a time offset parameter corresponding to said at least one time offset, after which time interval the first device transmits a next synchronization signal to said second device.
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23. A first device for synchronizing with at least one second device, comprising
a transmitter for transmitting a synchronization signal to said at least one second device to determine at least one time offset between a clock of the first device and at least one clock associated with said at least one second device; -
a receiver for receiving said at least one time offset from said at least one second device; a time interval determination unit for determining a time interval for the first device based on a time offset parameter corresponding to said at least one time offset, after which time interval the transmitter transmits a next synchronization signal to said at least one second device.
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Specification