Passage determination of a portable wireless transceiver device
View Patent ↗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.
1. 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.
2. The method according to claim 1 , comprising:
acquiring auxiliary information,
wherein said auxiliary information represents a first distance, and wherein at least one ToF measurement is translated into a second distance, and
wherein determining whether the portable wireless transceiver device has passed the network node along the constrained path or not is based on comparing said second distance to said first distance.
3. The method according to claim 1 , further comprising:
adapting the number of ToF measurements to be acquired depending on the determined passage of the portable wireless transceiver device relative the network node.
4. The method according to claim 1 , further comprising: acquiring a time duration indication for measuring at least two of the ToF measurements between the portable wireless transceiver device and the single network node; and
determining a velocity of the portable wireless transceiver device based on the acquired time duration indication.
5. The method according to claim 1 , wherein the constrained path is an indoor passageway.
6. The method according to claim 1 , further comprising:
acquiring infrastructure information comprising the constrained path, and
determining whether the portable wireless transceiver device has passed the network node along the constrained path or not also based on the infrastructure information.
7. The method according to claim 6 , wherein the infrastructure information is a roadmap.
8. The method according to claim 1 , wherein the portable wireless transceiver device is vehicle mounted.
9. The method according to claim 1 , further comprising:
acquiring further ToF measurements between a further portable wireless transceiver device and the network node or a further single network node.
10. The method according to claim 9 , further comprising:
determining that the portable wireless transceiver device and the further portable wireless transceiver device are proximate each other; and
generating a notification thereof.
11. The method according to claim 1 , wherein the at least one ToF measurement is based on radio signaling between the portable wireless transceiver device and the network node.
12. The method according to claim 1 , wherein the portable wireless transceiver device is a portable wireless radio transceiver device, and wherein the network node is a radio access network node.
13. The method according to claim 12 , wherein the radio access network node is a wireless local area network, WLAN, access point.
14. The method according to claim 1 , wherein the at least one ToF measurement is based on light signaling between the portable wireless transceiver device and the network node.
15. 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.
16. A system for determining passage of a portable wireless transceiver device along a constrained path, the system comprising a server according to claim 15 , at least one network node, and at least one portable wireless transceiver device.
17. 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.