Beam selection apparatus and method for selecting beam in a fixed beam terminal

Patent metadata

Field	Value
Publication number	US-9872277-B2
Application number	US-201514948554-A
Country	US
Kind code	B2
Filing date	Nov 23, 2015
Priority date	Dec 30, 2014
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

The exemplary embodiment of the present invention provides a beam selecting apparatus of a fixed beam terminal, including: a delay time measuring unit which measures delay times of a plurality of signals received through a plurality of beams; a beam selecting unit which compares a threshold value selected based on the measured delay time and a signal strength of each of the plurality of signals to select a beam; and a switching type beam former which operates the plurality of beams in accordance with the selected beam.

First claim

What is claimed is:

1. A beam selecting apparatus of a fixed beam terminal, comprising:
an initial synchronization obtaining means configured to obtain initial synchronization through the plurality of beams to determine an initial reception beam;
a delay time measuring means configured to measure delay times of a plurality of signals received through a plurality of beams based on the obtained initial synchronization;
a beam selecting means configured to compare a threshold value selected based on the measured delay time and a signal strength of each of the plurality of signals to select a beam; and
a switching type beam former configured to operate the plurality of beams in accordance with the selected beam.

2. The apparatus of claim 1 , wherein the delay time measuring means operates a fine time synchronization block for each of the plurality of signals based on the obtained initial synchronization to measure the delay time.

3. The apparatus of claim 1 , wherein the beam selecting means compares the measured delay time with a predetermined time to determine whether a visible ray component is included in the received signal to determine the threshold value.

4. The apparatus of claim 1 , wherein when the signal strength is larger than the threshold value, the beam selecting means selects a beam which receives the signal.

5. The apparatus of claim 4 , further comprising:
a beam selecting control means configured to control to repeatedly re-search the reception beam when the plurality of signals does not have a signal whose strength is larger than the threshold value.

6. The apparatus of claim 5 , wherein when the re-searching is repeated predetermined number of times or more so that no beam is selected, the beam selecting control means determines the region as a shadow area.

7. The apparatus of claim 1 , further comprising:
a beam selecting information transmitting means configured to transmit the beam selecting information and the signal strength to the base station.

8. A beam selecting method, comprising:
obtaining initial synchronization through the plurality of beams to determine an initial reception beam;
measuring delay times of a plurality of signals received through a plurality of beams of a switching type beam former of a fixed beam terminal based on the obtained initial synchronization;
selecting a threshold value for every signal based on the measured delay time;
comparing signal strengths of the plurality of signals with threshold values selected for the plurality of signals; and
selecting a beam which receives a signal of which strength is larger than the threshold value among the plurality of signals.

9. The method of claim 8 , wherein the measuring of a delay time includes measuring the delay time by operating a fine time synchronization block for every signal based on the obtained initial synchronization.

10. The method of claim 8 , wherein the selecting of a beam includes repeatedly re-searching another beam when there is no signal of which strength is larger than the threshold value.

11. The method of claim 10 , further comprising:
determining a shadow area when no beam is selected even though the re-searching is repeated predetermined number of times or more.

12. The method of claim 8 , further comprising:
transmitting information of the selected beam and the signal strength to the base station.

13. A beam selecting method, comprising:
obtaining initial synchronization through a plurality of signals received through a plurality of beams of a switching type beam former of a fixed beam terminal to determine an initial reception beam;
measuring signal strengths of the plurality of received signals to select a signal;
measuring a delay time based on the initial synchronization obtained for the selected signal;
selecting a threshold value depending on whether there is a visible ray component in the signal selected based on the measured delay time; and
comparing the selected threshold value with the measured signal strength to select a beam.

14. The method of claim 13 , wherein the measuring of a delay time includes measuring the delay time by operating a fine time synchronization block selected signal based on the obtained initial synchronization.

15. The method of claim 13 , further comprising:
repeatedly re-searching an another beam when there is no signal of which strength is larger than the threshold value.

16. The method of claim 15 , further comprising:
determining a shadow area when no beam is selected even though the re-searching is repeated predetermined number of times or more.

17. The method of claim 13 , further comprising:
transmitting information of the beam and the signal strength to the base station.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Park Hyeong Sook
• Lee Yong Su
• Park Youn Ok

Classifications

• H04B17/318

  Received signal strength · CPC title

• H04W72/02 Primary

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• H04B7/0404

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• H04W56/0065

  using measurement of signal travel time · CPC title

• H04B17/327

  Received signal code power [RSCP] · CPC title