Method for transmitting reference signal

Patent metadata

Field	Value
Publication number	US-2016119856-A1
Application number	US-201414895144-A
Country	US
Kind code	A1
Filing date	May 21, 2014
Priority date	Jun 17, 2013
Publication date	Apr 28, 2016
Grant date	—

Abstract

In one disclosure of the present specification, a method is provided for transmitting a reference signal in a small-sized cell. The method for transmitting the reference signal may comprise the steps of: generating, by the small-sized cell, a sequence of the reference signal, based on a physical cell ID and cell load degree; transmitting, by the small-sized cell, the generated sequence of the reference signal on a mapped resource element (RE); and transmitting, by the small-sized cell to a terminal during camp-on, information about the cell load degree used during the generation of the sequence of the reference signal.

First claim

What is claimed is:

1 . A method of transmitting a reference signal in a small cell, the method comprising:
generating, by the small cell, a sequence of the reference signal on the basis of a physical cell identity (ID) and a cell loading level; transmitting, by the small cell, the generated sequence of the reference signal on a mapped resource element (RE); and transmitting, by the small cell to a terminal camping on the cell, information regarding the cell loading level used during the generation of the sequence of the reference signal.

2 . The method of claim 1 , wherein the generating of the sequence of the reference signal comprises inputting the physical cell ID and information based on the cell loading level to a pseudo-random sequence.

3 . The method of claim 1 , wherein the generating of the sequence of the reference signal comprises:
generating a first sequence on the basis of the physical cell ID; generating a second sequence on the basis of the information based on the cell loading level; and generating the sequence of the reference signal by adding the first sequence and the second sequence.

4 . The method of claim 3 , wherein the greater the cell loading level, the greater the second sequence to be added to the sequence of the reference signal.

5 . The method of claim 3 , wherein the smaller the cell loading level, the smaller the second sequence to be added to the sequence of the reference signal.

6 . The method of claim 3 , wherein the information related to the cell loading level to be delivered to the terminal comprises information regarding the second sequence.

7 . The method of claim 6 , wherein the information regarding the second sequence comprises a seed value that can be utilized in the generation of the second sequence.

8 . A base station of a small cell for transmitting a reference signal, the base station comprising:
a processor for generating a sequence of the reference signal on the basis of a physical cell identity (ID) and a cell loading level; and a transceiver for transmitting the generated sequence of the reference signal on a mapped resource element (RE), and for transmitting, to a terminal camping on the cell, information regarding the cell loading level used during the generation of the sequence of the reference signal.

9 . The base station of claim 8 , wherein in order to generate the sequence of the reference signal, the processor inputs the physical cell ID and information based on the cell loading level to a pseudo-random sequence.

10 . The base station of claim 8 , wherein in order to generate the sequence of the reference signal, the processor is configured for:
generating a first sequence on the basis of the physical cell ID; generating a second sequence on the basis of the information based on the cell loading level; and generating the sequence of the reference signal by adding the first sequence and the second sequence.

11 . The base station of claim 10 , wherein the the greater the cell loading level, the greater the second sequence to be added to the sequence of the reference signal.

12 . The base station of claim 10 , wherein the smaller the cell loading level, the smaller the second sequence to be added to the sequence of the reference signal.

13 . The base station of claim 10 , wherein the information related to the cell loading level to be delivered to the terminal comprises information regarding the second sequence.

14 . The base station of claim 13 , wherein the information regarding the second sequence comprises a seed value that can be utilized in the generation of the second sequence.

Assignees

• Lg Electronics Inc

Inventors

• Hwang Daesung
• Lee Seungmin
• Yi Yunjung
• Ahn Joonkui
• Park Hanjun

Classifications

• H04W48/08 Primary

  Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) · CPC title

• H04W48/12

  using downlink control channel · CPC title