Latency management
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsPatrik Åberg, Stefan Runeson
Life of this patent
Estimating the term…
Abstract
A method for use in an automated wireless industrial system comprising a device configured to act as a control node and at least one field level device, wherein the method comprises: issuing a control communication; inserting at least one time delay (tk) to the control communication; noting the communication time (TCL) for the communication; comparing the time for communication (TCL) to an expected time for communication (TR); and determining if any of the at least one time delay (tk) should be adapted, and if so, adapting at least that time delay.
Claims18
A method for use in a wireless system comprising a control node and at least one field-level device, wherein the method comprises:
- monitoring a time for a control loop performed on a recurring basis, the control loop involving wireless communication between the control node and the at least one field level device;
- and
- adjusting an intentional delay inserted into the control loop, to regulate the time for the control loop according to a required time, wherein adjusting the intentional delay comprises adjusting the intentional delay to a higher value responsive to the time for the control loop being lower than the required time and adjusting the intentional delay to a lower value responsive to the time for the control loop being higher than the required time.
A control node of a wireless system comprising at least one field-level device and the control node, the control node comprising:
- a wireless interface configured for communicating with the at least one field-level device;
- and
- processing circuitry configured to:
- monitor a time for a control loop performed on a recurring basis, the control loop involving wireless communication between the control node and the at least one field-level device;
- and
- adjust an intentional delay inserted into the control loop, to regulate the time for the control loop according to a required time, wherein the processing circuitry is configured to adjust the intentional delay to a higher value responsive to the time for the control loop being lower than the required time and adjust the intentional delay to a lower value responsive to the time for the control loop being higher than the required time.
Dependencies are inferred from the claim text.