DISTRIBUTING A CLOCK IN A SUBTERRANEAN SURVEY DATA ACQUISITION SYSTEM
First Claim
1. A method comprising:
- determining a first difference between a time that a first network element of a subterranean survey data acquisition network receives a first frame pulse from a second network element of the network and a time that the first network element transmits a second frame pulse to the second network element;
determining a second difference between a time that the second network element receives the second frame pulse and a time that the second network element transmits the first frame pulse;
determining a transmission delay between the first and second network elements based on the first and second differences; and
distributing a network clock based on the determined transmission delay.
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Accused Products
Abstract
A technique includes determining a first difference between a time that a first network element of a seismic acquisition network receives a first frame pulse from a second network element of the seismic acquisition network and a time that the first network element transmits a second frame pulse to the second network element. The technique includes determining a second difference between a time that the second network element receives the second frame pulse and a time that the second network element transmits the first frame pulse. The technique includes determining a transmission delay between the first and second network elements based on the first and second time differences.
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Citations
21 Claims
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1. A method comprising:
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determining a first difference between a time that a first network element of a subterranean survey data acquisition network receives a first frame pulse from a second network element of the network and a time that the first network element transmits a second frame pulse to the second network element; determining a second difference between a time that the second network element receives the second frame pulse and a time that the second network element transmits the first frame pulse; determining a transmission delay between the first and second network elements based on the first and second differences; and distributing a network clock based on the determined transmission delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus comprising:
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a subterranean survey data acquisition network comprising a first network element and a second network element;
whereinthe first network element is adapted to; determine a first difference between a time that the first network element receives a first frame pulse from the second network element and a time that the first network element transmits a second frame pulse to the second network element, and communicate an indication of the first difference to the second network element; and the second network element is adapted to; determine a second difference between a time that the second network element receives the second frame pulse and a time that the second network element transmits the first frame pulse, based on the second difference and the indication of the first difference communicated from the first network element, determine a transmission delay between the first and second network elements and adjust a distributed clock value based on the determined transmission delay. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification