Passage determination of a portable wireless transceiver device
AssigneeABB Schweiz AG
InventorsEwa Hansen, Jonas Neander, Krister Landernas, Linus Thrybom
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Abstract
There is provided a method for determining passage of a portable wireless transceiver device along a constrained path. The method comprises acquiring at least one time of flight (ToF) measurement and auxiliary information, the at least one ToF measurement being measured between a portable wireless transceiver device and a single network node. The network node is mounted proximate a constrained path. The method comprises determining whether the portable wireless transceiver device has passed the network node along the constrained path or not based on the at least one ToF measurement and the auxiliary information.
Claims17
A method for determining passage of a portable wireless transceiver device along a constrained path, comprising:
- acquiring at least three time of flight, ToF, measurements being measured between a portable wireless transceiver device and a single network node, wherein the network node is mounted proximate a constrained path;
- and
- determining whether the portable wireless transceiver device has passed the network node along the constrained path or not based on a local minimum measurement of the at least three ToF measurements not corresponding to an endpoint ToF measurement.
A server for determining passage of a portable wireless transceiver device along a constrained path, the server comprising:
- a memory device structured to store a plurality of instructions;
- a processing unit structured to execute the plurality of instructions effective to:
- acquire at least three time of flight, ToF, measurements being measured between a portable wireless transceiver device and a single network node, wherein the network node is mounted proximate a constrained path;
- and
- determine whether the portable wireless transceiver device has passed the network node along the constrained path or not based on a local minimum measurement of the at least three ToF measurements not corresponding to an endpoint ToF measurement.
A memory device for determining passage of a portable wireless transceiver device along a constrained path comprising:
- a set of instructions stored on the memory device and structured to be executable by a processing device effective to:
- acquire at least three time of flight, ToF, measurements being measured between a portable wireless transceiver device and a single network node, wherein the network node is mounted proximate a constrained path;
- and
- determine whether the portable wireless transceiver device has passed the network node along the constrained path or not based on a local minimum measurement of the at least three ToF measurements not corresponding to an endpoint ToF measurement.
Dependencies are inferred from the claim text.