Method and apparatus for determining a position of user equipment, and an antenna set therefor

Patent metadata

Field	Value
Publication number	US-9625561-B2
Application number	US-201313872025-A
Country	US
Kind code	B2
Filing date	Apr 26, 2013
Priority date	Apr 26, 2013
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

There is provided a method for positioning of user equipment. The method for positioning of user equipment, includes: receiving, by the user equipment, a signal from an external antenna, the signal being radiated in a cyclic pattern; measuring, by the user equipment, strength of the received signal, characterizing, by the user equipment, the measured strength to form a signal pattern over a time period; and determining a position of the user equipment based on the signal pattern.

First claim

What is claimed is:

1. A method in a user equipment for determining a position of the user equipment, comprising:
receiving, by the user equipment, a signal from an external antenna, the signal being radiated in a cyclic pattern, wherein the signal is radiated in a clockwise direction and a counterclockwise direction alternately;
measuring, by the user equipment, a strength of the received signal;
characterizing, by the user equipment, the measured strength to form a signal pattern over a time period;
analyzing, by the user equipment, the signal pattern to recognize pattern parameters, wherein the pattern parameters include:
a peak to peak time interval indicative of a time interval between two neighboring peaks in the signal pattern,
a quiescent time at which the measured strength maintains in a constant level for a predetermined time, and
a maximum strength in the signal pattern; and

determining, by the user equipment, a position of the user equipment based on the signal pattern.

2. The method of claim 1 , further comprising:
storing information on a plurality of reference quiescent times associated with respective reference signal radiation directions of the external antenna; and
storing information on a plurality of reference peak to peak time intervals associated with respective angles with respect to the reference signal radiation direction of the external antenna in the user equipment.

3. The method of claim 2 , wherein the analyzing includes recognizing a quiescent time from the signal pattern, and wherein the determining includes comparing the recognized quiescent time with the reference quiescent times to determine the reference signal radiation direction.

4. The method of claim 3 , wherein the analyzing includes recognizing a peak to peak time interval from the signal pattern, and wherein the determining includes:
comparing the recognized peak to peak time interval with the reference peak to peak time intervals to select one among the reference time intervals; and
determining an angle of the user equipment with respect to the reference signal radiation direction based on the selected reference time interval and the signal pattern at the quiescent time.

5. The method of claim 4 , further comprising storing information of reference strength of the signal radiated from the external antenna in the user equipment,
wherein the analyzing includes recognizing maximum strength from the signal pattern, and
wherein the determining includes comparing the maximum strength with the reference strength to determine a distance from the user equipment to the external antenna.

6. The method of claim 1 , further comprising storing a plurality of reference signal pattern models associated with respective angles with respect to the reference signal radiation direction in the user equipment, wherein the determining includes:
comparing the signal pattern with the reference signal pattern models to select a most similar reference signal pattern model; and
determining an angle of the user equipment with respect to the reference signal radiation direction based on the selected reference signal pattern model.

7. An apparatus of a user equipment for determining a position of the user equipment, comprising:
a processing unit being configured to:
measure a strength of a signal received by the user equipment that is radiated from an external antenna, wherein the signal is radiated from the external antenna in a cyclic pattern that rotates in a clockwise direction and a counterclockwise direction alternately;
characterize the strength of the signal radiated from the external antenna to the user equipment to form a signal pattern over a time period;
analyze the signal pattern to recognize pattern parameters, wherein the pattern parameters include:
a quiescent time at which signal pattern maintains in a constant level for a predetermined time;
a peak to peak time interval indicative of a time interval between two neighboring peaks in the signal pattern within a predetermined cycle; and
a maximum strength in the signal pattern; and

compute at least one of an angle and a distance of the user equipment with respect to the external antenna based on the signal pattern.

8. The apparatus of claim 7 , wherein the processing unit is further configured to determine a position of the user equipment based on the computed angle and distance.

9. The apparatus of claim 7 , further comprising a storage unit configured to store:
information on a plurality of reference quiescent times associated with respective reference signal radiation directions of the external antenna; and
information on a plurality of reference peak to peak time intervals associated with respective angles with respect to the reference signal radiation direction of the external antenna.

10. The apparatus of claim 9 , wherein the processing unit is configured to recognize a quiescent time from the signal pattern, and compare the recognized quiescent time with the reference quiescent times to determine the reference signal radiation direction,
the processing unit being further configured to
recognize a peak to peak time interval from the signal pattern,
compare the recognized peak to peak time interval with the reference peak to peak time intervals to select one among the reference peak to peak time intervals, and
determine the angle of the user equipment with respect to the reference signal radiation direction based on the selected reference peak to peak time interval and the signal pattern at the quiescent time.

11. The apparatus of claim 9 , wherein:
the storage unit is configured to store information of reference strength of the signal radiated from the external antenna; and
the processing unit is configured to recognize maximum strength from the signal pattern, and to compare the maximum strength with the reference strength to determine the distance from the user equipment to the external antenna.

12. The apparatus of claim 8 , further comprising a storage unit configured to store a plurality of reference signal pattern models associated with respective angles with respect to the reference signal radiation direction,
wherein the processing unit is configured to
compare the signal pattern with the reference signal pattern models to select a most similar reference signal pattern model, and
determine the angle of the user equipment with respect to the reference signal radiation direction based on the selected reference signal pattern model.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Jihoon Lee
• Junghoon Kim
• Konju Lee

Classifications

• G01S5/02521 Primary

  using a radio-map · CPC title

• G01S1/12

  the signals being transmitted sequentially from an antenna or antenna system having the orientation of its directivity characteristic periodically varied, e.g. by means of sequentially effective reflectors · CPC title

• G01S1/58

  wherein a characteristic of the beam transmitted or of an auxiliary signal is varied in time synchronously with rotation or oscillation of the beam · CPC title

• G01S1/14 Primary

  using amplitude comparison of signals transmitted simultaneously from antennas or antenna systems having differently oriented overlapping directivity-characteristics · CPC title

• G01S3/58

  Rotating or oscillating beam systems using continuous analysis of received signal for determining direction in the plane of rotation or oscillation or for determining deviation from a predetermined direction in such a plane (G01S3/16 takes precedence) · CPC title