Method and devices for hybrid scanning in wireless access system supporting millimeter waves

Patent metadata

Field	Value
Publication number	US-10506533-B2
Application number	US-201515550757-A
Country	US
Kind code	B2
Filing date	Feb 13, 2015
Priority date	Feb 13, 2015
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

The present invention provides a method for hybrid scanning to reduce overhead in a beam scanning scheme in a millimeter wave (mmWave) system, and devices supporting same. The method for hybrid scanning in a wireless access system supporting millimeter wave technology, according to one embodiment of the present invention, comprises the steps of: receiving a synchronization signal to synchronize with a base station; synchronizing with the base station using the synchronization signal; receiving, from the base station, first pilot signals having different configuration patterns according to each transmitting antenna; ray-scanning using the first pilot signals; selecting a candidate beamforming port set through the ray-scanning; generating second pilot signals having different configuration patterns according to each beamforming port included in the candidate beamforming port set; and transmitting, to the base station, the second pilot signals to perform beam scanning with the base station.

First claim

What is claimed is:

1. A method of performing a hybrid scanning in a wireless access system supportive of a millimeter wave technology, comprising:
receiving a synchronization signal to match synchronization with a base station;
matching the synchronization with the base station using the synchronization signal;
receiving first pilot signals having different configuration patterns per transmitting antenna port from the base station, the first pilot signals for a ray scanning;
performing the ray scanning using the first pilot signals;
selecting a candidate beamforming port set through the ray scanning;
generating second pilot signals having different configuration patterns per candidate beamforming port included in the candidate beamforming port set; and
transmitting the second pilot signals to the base station to perform a beam scanning with the base station,
wherein the first pilot signals are multiplexed with:
a pilot index for generating the second pilot signals, and
a resource pool index indicating a resource region carrying the second pilot signals.

2. The method of claim 1 , wherein the second pilot signals are transmitted to the base station through the resource region indicated by the resource pool index.

3. The method of claim 1 , wherein the first pilot signals are transmitted in form of repetition.

4. The method of claim 1 , wherein the second pilot signals are transmitted in form of repetition.

5. A user equipment performing a hybrid scanning in a wireless access system supportive of a millimeter wave technology, comprising:
a receiver;
a transmitter; and
a processor configured to support the hybrid scanning,
wherein the processor is further configured to:
receive a synchronization signal to match synchronization with a base station by controlling the receiver,
match the synchronization with the base station using the synchronization signal,
receive first pilot signals having different configuration patterns per transmitting antenna port from the base station by controlling the receiver, the first pilot signals for a ray scanning,
perform the ray scanning using the first pilot signals,
select a candidate beamforming port set through the ray scanning,
generate second pilot signals having different configuration patterns per candidate beamforming port included in the candidate beamforming port set, and
transmit the second pilot signals to the base station to perform a beam scanning with the base station,
wherein the first pilot signals are multiplexed with:
a pilot index for generating the second pilot signals, and
a resource pool index indicating a resource region carrying the second pilot signals.

6. The user equipment of claim 5 , wherein the second pilot signals are transmitted to the base station through the resource region indicated by the resource pool index.

7. The user equipment of claim 5 , wherein the first pilot signals are transmitted in form of repetition.

8. The user equipment of claim 5 , wherein the second pilot signals are transmitted in form of repetition.

Assignees

• Lg Electronics Inc

Inventors

• Choi Kukheon
• Chung Jaehoon
• Hahn Genebeck
• Lee Eunjong
• Kim Jinmin
• Noh Kwangseok
• Lee Sangrim

Classifications

• H04B3/10

  by pilot signal · CPC title

• H04L27/3836

  in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication · CPC title

• H04W88/08

  Access point devices · CPC title

• H04W56/001 Primary

  Synchronization between nodes · CPC title

• H04L27/3455

  in order to facilitate carrier recovery at the receiver end, e.g. by transmitting a pilot or by using additional signal points to allow the detection of rotations · CPC title