Communications protocol for well-logging digital telemetry...

H - Electricity – 04 – L

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H04L 12/56 (2006.01) E21B 47/12 (2006.01) G01V 1/22 (2006.01) G01V 11/00 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2114235

The present invention relates to a communications proto- cot for a digital telemetry system which enables more efficient digital data transmission between a plurality of digital commu- nications nodes: The protocol is implemented using uplink and downlink packets and superpackets. Each node forms an up- link packet which contains node data and protocols. Those packets are packaged into uplink superpackets and transmitted to a control node. Downlink superpackets containing informa- tion signifying which of the uplink superpackets were received correctly are formed and transmitted to the individual nodes. In response, any uplink superpacket received incorrectly is retrans- mitted. Additionally, the communications protocol also time stamps messages received from the nodes to provide for digital communications time correlation.

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