METHOD FOR TRANSMITTING AND RECEIVING UE-SPECIFIC REFERENCE SIGNAL AND APPARATUS FOR SAME

• US 20150003346A1
• Filed: 09/10/2012
• Published: 01/01/2015
• Est. Priority Date: 09/09/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Dongcheol, Cho, Hangyu, Han, Seunghee, Noh, Minseok
• Granted Patent: US 9,344,247 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 25/022 of frequency response
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal

Abstract

Disclosed are a method for transmitting and receiving a UE-specific reference signal and an apparatus for same. A method for a base station transmitting the UE-specific reference signal in a wireless communication system, according to one embodiment of the present invention, comprises a step of the base station transmitting the UE-specific reference signal to the UE by using a pre-determined pattern, wherein the predetermined pattern can be a pattern which is mapped onto an RE, in which the UE-specific reference index is an index including symbol indexes 0, 3 and 6 from an even-numbered index slot within one resource block (RB), or mapped onto an RE in which the UE-specific reference index is an index including symbol indexes 2 and 5 from an odd-numbered index slot within the RB.

Claims

1. A method for transmitting a user equipment (UE)-specific reference signal by a base station (BS) in a wireless communication system, the method comprising:

transmitting the UE-specific reference signal to a UE using a predetermined pattern,

wherein the predetermined pattern is a pattern in which the UE-specific reference signal is mapped to reference elements (REs) corresponding to indices including symbol indices 0, 3 and 6 in an even-numbered index slot in one resource block (RB) and mapped to REs corresponding to indices including symbol indices 2 and 5 in an odd-numbered index slot in the RB.

2. The method according to claim 1, wherein the predetermined pattern is applied to a subframe to which a normal cyclic prefix (CP) is applied.

3. The method according to claim 1, wherein the UE-specific reference signal is mapped to REs corresponding to subcarrier indices 1, 5 and 9 or subcarrier indices 3, 7 and 11 among the REs corresponding to the indices including the symbol indices 0, 3 and 6 in the predetermined pattern.

4. A method for transmitting a user equipment (UE)-specific reference signal by a base station (BS) in a wireless communication system, the method comprising:

transmitting the UE-specific reference signal to a UE using a predetermined pattern,

wherein the predetermined pattern is a pattern in which the UE-specific reference signal is mapped to REs corresponding to indices including symbol indices 1 and 4 per slot in one RB.

5. The method according to claim 4, wherein the predetermined pattern is applied to a subframe to which an extended CP is applied.

6. The method according to claim 4, wherein the UE-specific reference signal is mapped to REs corresponding to subcarrier indices 0, 3, 6 and 9 or subcarrier indices 2, 5, 6 and 11 among the REs corresponding to the indices including the symbol indices 1 and 4 in the predetermined pattern.

7. A method for receiving a user equipment (UE)-specific reference signal by a UE in a wireless communication system, the method comprising:

receiving the UE-specific reference signal from a base station (BS) using a predetermined pattern,

wherein the predetermined pattern is a pattern in which the UE-specific reference signal is mapped to REs corresponding to indices including symbol indices 0, 3 and 6 in an even-numbered index slot in one resource block (RB) and mapped to REs corresponding to indices including symbol indices 2 and 5 in an odd-numbered index slot in the RB.

8. A method for receiving a user equipment (UE)-specific reference signal by a UE in a wireless communication system, the method comprising:

receiving the UE-specific reference signal from a base station (BS) using a predetermined pattern,

wherein the predetermined pattern is a pattern in which the UE-specific reference signal is mapped to REs corresponding to indices including symbol indices 1 and 4 per slot in one resource block (RB).

9. A base station (BS) for transmitting a user equipment (UE)-specific reference signal in a wireless communication system, the BS comprising:

a transmitter for transmitting the UE-specific reference signal to a user equipment (UE) using a predetermined pattern,

wherein the predetermined pattern is a pattern in which the UE-specific reference signal is mapped to REs corresponding to indices including symbol indices 0, 3 and 6 in an even-numbered index slot in one resource block (RB) and mapped to REs corresponding to indices including symbol indices 2 and 5 in an odd-numbered index slot in the RB.

10. A user equipment (UE) for receiving a UE-specific reference signal in a wireless communication system, the UE comprising:

a receiver for receiving the UE-specific reference signal from a BS using a predetermined pattern,

wherein the predetermined pattern is a pattern in which the UE-specific reference signal is mapped to REs corresponding to indices including symbol indices 0, 3 and 6 in an even-numbered index slot in one resource block (RB) and mapped to REs corresponding to indices including symbol indices 2 and 5 in an odd-numbered index slot in the RB.