Sub-Frame Synchronized Residual Ranging
First Claim
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1. A method of ranging between nodes, the method comprising:
- synchronizing two or more nodes with a frame preamble;
exchanging data and ranging schedule between the nodes without an additional frame preamble;
starting a schedule clock in each node in response to a switch point; and
exchanging one or more range signals between nodes based on the ranging schedule.
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Abstract
A method of ranging between nodes is provided. The method includes synchronizing two or more nodes with a frame preamble. Exchanging data and ranging schedule between the nodes without an additional frame preamble. Starting a schedule clock in each node in response to a switch point and exchanging one or more range signals between nodes based on the ranging schedule.
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Citations
20 Claims
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1. A method of ranging between nodes, the method comprising:
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synchronizing two or more nodes with a frame preamble; exchanging data and ranging schedule between the nodes without an additional frame preamble; starting a schedule clock in each node in response to a switch point; and exchanging one or more range signals between nodes based on the ranging schedule. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of communication with a node, the method comprising:
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synchronizing communication with at least one other node with a frame preamble, exchanging data in a frame between the node and the at least one other node without an additional frame preamble, the exchanged data including a ranging schedule; entering into a ranging mode upon detection of a special switch point; implementing a schedule timer when the node is scheduled to receive a range signal; and transmitting range data when scheduled to transmit. - View Dependent Claims (13, 14, 15)
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16. A communication node comprising:
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a transmitter/receiver circuit adapted to selectively transmit and receive communication signals; a synchronization circuit adapted to synchronize the local clock with a received communication signal from at least one other communication node to establish communications between the communication nodes; and a control circuit adapted to control the transmitter/receiver circuit and the synchronization circuit, the control circuit being adapted to process communication signals, the control circuit further adapted to direct communications between the communication nodes without re-synchronizing the local clock for a period of time, the control circuit further adapted to enter into a ranging mode and implement a ranging schedule in response to a special switch point; a start clock adapted to clock scheduling operations of the communication node when the communication node enters into the ranging mode; and a range timer adapted to track a time period when the node is scheduled to receive range data. - View Dependent Claims (17, 18, 19, 20)
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Specification