Proximity based positioning in a wireless communications network

Patent metadata

Field	Value
Publication number	US-2018041868-A1
Application number	US-201515549336-A
Country	US
Kind code	A1
Filing date	Feb 27, 2015
Priority date	Feb 27, 2015
Publication date	Feb 8, 2018
Grant date	—

Abstract

A method performed by a network node or a wireless communications device for determining a reporting threshold related to proximity based positioning in a wireless communications network. For each of a plurality of candidate reporting thresholds the network node or the wireless communications device calculates a corresponding localization accuracy metric based on a deployment information related to a deployment of the wireless communications network, an evaluation position related to the evaluation of a received signal, a propagation model relating the evaluation position and the evaluation of the received signal, and the respective candidate reporting threshold. The network node or the wireless communications device then determines the reporting threshold based on the plurality of corresponding localization accuracy metrics.

First claim

1 . A method performed by a network node for determining a reporting threshold related to proximity based positioning in a wireless communications network, the method comprising:
for each of a plurality of candidate reporting thresholds calculating a corresponding localization accuracy metric based on:
a deployment information related to a deployment of the wireless communications network;
an evaluation position related to the evaluation of a received signal;
a propagation model relating the evaluation position and the evaluation of the received signal; and
the respective candidate reporting threshold; and
determining the reporting threshold based on the plurality of corresponding localization accuracy metrics.

2 . The method according to claim 1 , wherein the corresponding localization accuracy metric is related to a plurality of evaluation positions.

3 . The method according to claim 1 , wherein determining the reporting threshold is further based on that the corresponding localization accuracy metric fulfils a requirement related to localization accuracy.

4 . The method according to claim 1 , wherein determining the reporting threshold is further based on an optimization of the localization accuracy metric with respect to the reporting threshold.

5 . The method according to claim 1 , wherein the localization accuracy metric is a localization Root-Mean-Square-Error, RMSE.

6 . The method according to claim 1 , wherein the localization RMSE is calculated based on a Cramer-Rao Bound, CRB, analysis.

7 . The method according to claim 1 , wherein the propagation model is a Received Signal Strength, RSS, model.

8 . The method according to claim 1 , wherein the deployment information comprises any at least one taken from the group consisting of: a transmitter location, a transmitter power and building information.

9 . The method according to claim 1 , further comprising:
configuring a wireless communications device with the reporting threshold.

10 . A network node for determining a reporting threshold related to proximity based positioning in a wireless communications network, the network node is being configured to:
for each of a plurality of candidate reporting thresholds calculate a corresponding localization accuracy metric based on:
a deployment information related to a deployment of the wireless communications network;
an evaluation position related to the evaluation of a received signal;
a propagation model relating the evaluation position and the evaluation of the received signal; and
the respective candidate reporting threshold; and
determine the reporting threshold based on the plurality of corresponding localization accuracy metrics.

11 . The network node according to claim 10 , further configured to:
for each of the plurality of candidate reporting thresholds, calculate a corresponding localization accuracy metric for a plurality of evaluation positions.

12 . The network node according to claim 10 , further configured to determine the reporting threshold based on that the corresponding localization accuracy metric fulfils a requirement related to localization accuracy.

13 . The network node according to claim 10 , further configured to determine the reporting threshold based on an optimization of the localization accuracy metric with respect to the reporting threshold.

14 . The network node according to claim 10 , wherein the localization accuracy metric is a localization Root-Mean-Square-Error, RMSE.

15 . The network node according to claim 10 , wherein the localization RMSE is calculated based on a Cramer-Rao Bound, CRB, analysis.

16 . The network node according to claim 10 , wherein the propagation model is a Received Signal Strength, RSS, model.

17 . The network node according to claim 10 , wherein the deployment information comprises at least taken from the group consisting of: a transmitter location, a transmitter power and building information.

18 . The network node according to claim 10 , further configured to:
configure a wireless communications device with the reporting threshold.

19 . A method performed by a wireless communications device for determining a reporting threshold related to proximity based positioning in a wireless communications network, the method comprising:
for each of a plurality of candidate reporting thresholds calculating a corresponding localization accuracy metric based on:
a deployment information related to a deployment of the wireless communications network;
an evaluation position related to the evaluation of a received signal;
a propagation model relating the evaluation position and the evaluation of the received signal; and
the respective candidate reporting threshold; and
determining the reporting threshold based on the plurality of corresponding localization accuracy metrics.

20 . The method according to claim 19 , wherein the corresponding localization accuracy metric is related to a plurality of evaluation positions.

21 . The method according to claim 19 , wherein determining the reporting threshold is further based on that the corresponding localization accuracy metric fulfils a requirement related to localization accuracy.

22 . The method according to claim 19 , wherein determining the reporting threshold is further based on an optimization of the localization accuracy metric with respect to the reporting threshold.

23 . The method according to claim 19 , wherein the localization accuracy metric is a localization Root-Mean-Square-Error, RMSE.

24 . The method according to claim 19 , wherein the localization RMSE is calculated based on a Cramer-Rao Bound, CRB, analysis.

25 . The method according to claim 19 , wherein the propagation model is a Received Signal Strength, RSS, model.

26 . The method according to claim 19 , wherein the deployment information comprises at least one taken from the group consisting of: a transmitter location, a transmitter power and building information.

27 . The method according to claim 19 , further comprising:
configuring a second wireless communications device with the reporting threshold.

28 . A wireless communications device for determining a reporting threshold related to proximity based positioning in a wireless communications network, the wireless communications device is being configured to:
for each of a plurality of candidate reporting thresholds calculate a corresponding localization accuracy metric based on:
a deployment information related to a deployment of the wireless communications network;
an evaluation position related to the evaluation of a received signal;
a propagation model relating the evaluation position and the evaluation of the received signal; and
the respective candidate reporting threshold; and
determine the reporting threshold based on the plurality of corresponding localization accuracy metrics.

29 . The wireless communications device according to claim 28 , further configured to:
for each of the plurality of candidate reporting thresholds calculate a corresponding localization accuracy metric for a plurality of evaluation positions.

30 . The wireless communications device according to claim 28 , further configured to determine the reporting threshold based on that the corresponding localization accuracy metric fulfils

Assignees

• Ericsson Telefon Ab L M

Inventors

• Gunnarsson Fredrik
• Yin Feng
• Zhao Yuxin

Classifications

• H04W48/14

  using user query {or user detection} · CPC title

• G01S5/021

  Calibration, monitoring or correction (G01S5/0252 takes precedence) · CPC title

• G01S5/0036

  of measured values, i.e. measurement on mobile and position calculation on base station · CPC title

• H04W84/10

  Small scale networks; Flat hierarchical networks · CPC title

• H04W64/003

  locating network equipment · CPC title