Clock-state correction and/or clock-rate correction using relative drift-rate measurements
First Claim
1. A method performed at a node, the method comprising:
- outputting, from a rate-changeable clock included at the node, a first clock signal having a clock rate;
generating a second clock signal from the first clock signal for use in determining when transmissions in a network are to start;
sending and receiving data from the node using the first clock signal as a line encoding/decoding clock;
making relative clock-rate measurements at the node based on transmissions received at the node;
using the relative clock-rate measurements to adjust the clock rate of the rate-changeable clock;
making clock-state adjustments to the second clock signal.
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Accused Products
Abstract
In one embodiment, a method is performed at a node. The method comprises outputting, from a rate-changeable clock included at the node, a first clock signal having a clock rate. The method further comprises generating a second clock signal from the first clock signal for use in determining when transmissions in a network are to start. The method further comprises sending and receiving data from the node using the first clock signal as a line encoding/decoding clock. The method further comprises making relative clock-rate measurements at the node based on transmissions received at the node and using the relative clock-rate measurements to adjust the clock rate of the rate-changeable clock. The method further comprises making clock-state adjustments to the second clock signal.
29 Citations
20 Claims
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1. A method performed at a node, the method comprising:
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outputting, from a rate-changeable clock included at the node, a first clock signal having a clock rate; generating a second clock signal from the first clock signal for use in determining when transmissions in a network are to start; sending and receiving data from the node using the first clock signal as a line encoding/decoding clock; making relative clock-rate measurements at the node based on transmissions received at the node; using the relative clock-rate measurements to adjust the clock rate of the rate-changeable clock; making clock-state adjustments to the second clock signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A node comprising:
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a rate-changeable clock that outputs a first clock signal at a clock rate; and a transceiver to send and receive data; wherein the transceiver uses the first clock signal as its line encoding/decoding clock for sending and receiving data; wherein the node generates a second clock signal from the first clock signal for use in determining when transmissions in a network are to start; wherein the node makes relative clock-rate measurements and uses the relative clock-rate measurements to adjust the clock rate of the rate-changeable clock; wherein the node makes clock-state adjustments to the second clock signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A node comprising:
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a rate-changeable clock that outputs a first clock signal at a clock rate; a transceiver to send and receive data; and an elasticity buffer; wherein the transceiver uses the first clock signal as its line encoding/decoding clock for sending and receiving data; wherein the node makes relative clock-rate measurements using the elasticity buffer and uses the relative clock-rate measurements to adjust the clock rate of the rate-changeable clock. - View Dependent Claims (19, 20)
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Specification