Method and apparatus for transmitting uplink signal in wireless communication system

• US 9,825,743 B2
• Filed: 07/06/2016
• Issued: 11/21/2017
• Est. Priority Date: 02/20/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Jonghyun, Kim, Kijun, Kim, Byounghoon
• Primary Examiner(s): KHIRODHAR, MAHARISHI V
• Application Number:
  US15/203,660
• Publication Number:
  US 20170005765A1
• Time in Patent Office: 503 Days
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

A method for transmitting an uplink signal at a UE in a wireless communication system includes, when a virtual cell ID for a reference signal for demodulation of a physical uplink channel is provided, generating a sequence of the reference signal on the basis of the virtual cell ID, and transmitting the generated reference signal to an eNB. A sequence hopping pattern of the reference signal can be determined on the basis of the virtual cell ID.

Claims

1. A method for transmitting, by a user equipment (UE), an uplink reference signal, the method comprising:

obtaining, by the UE, a virtual cell identity n^PUSCH_ID and a physical cell identity N^cell_ID;

generating, by the UE, a first reference signal for demodulation of a physical uplink shared channel (PUSCH) based on the virtual cell identity n^PUSCH_ID;

transmitting, by the UE, the first reference signal;

generating, by the UE, a second reference signal for demodulation of a physical uplink control channel (PUCCH) based on the physical cell identity N^cell_ID; and

transmitting, by the UE, the second reference signal,

wherein the virtual cell identity n^PUSCH_IDε

{0, . . . , 509}, and the physical layer cell identity N^cell_IDε

{0, . . . , 503}.

2. The method according to claim 1,

wherein each of the first and second reference signals is generated using a sequence-shift pattern, and

wherein a sequence-shift pattern f^PUSCH_SS for the first reference signal is determined according to f^PUSCH_SS=n^PUSCH_ID mod 30, and a sequence shift pattern f^PUSCH_SS for the second reference signal is determined according to f^PUSCH_SS=N^cell_ID mod 30.

3. The method according to claim 2, further comprising:

receiving a higher layer signal including Δ

_ssε

{0, . . . , 29},

wherein the sequence-shift pattern f_ss^PUSCH for the first reference signal is determined according to f^PUSCH_SS=n^PUSCH_ID mod 30 irrespective of Δ

_ssε

{0, . . . , 29}.

4. The method according to claim 1,

wherein the virtual cell identity n^PUSCH_ID is provided by a higher layer signal.

5. A user equipment (UE) for transmitting an uplink reference signal, the UE comprising:

a transmitter, and

a processor configured to control the receiver and the transmitter, the processor configured to;

obtain a virtual cell identity n^PUSCH_ID and a physical cell identity N^cell_ID;

generate a first reference signal for demodulation of a physical uplink shared channel (PUSCH) based on the virtual cell identity n^PUSCH_ID;

control the transmitter to transmit the first reference signal;

generate a second reference signal for demodulation of a physical uplink control channel (PUCCH) based on the physical cell identity N^cell_ID; and

control the transmitter to transmit the second reference signal,

wherein the virtual cell identity n^PUSCH_IDε

{0, . . . , 509}, and the physical layer cell identity N^cell_IDε

{0, . . . , 503}.

6. The UE according to claim 5,

wherein each of the first and second reference signals is generated using a sequence-shift pattern, and

wherein a sequence-shift pattern f^PUSCH_SS for the first reference signal is determined according to f^PUSCH_SS=n^PUSCH_ID mod 30, and a sequence shift pattern f^PUSCH_SS for the second reference signal is determined according to f^PUSCH_SS=N^cell_ID mod 30.

7. The UE according to claim 6,

wherein the processor controls the transmitter to receive a higher layer signal including Δ

_ssε

{0, . . . , 29}, and

wherein the sequence shift pattern f_ss^PUSCH for the first reference signal is determined according to f^PUSCH_SS=n^PUSCH_ID mod 30 irrespective of Δ

_ssε

{0, . . . , 29} provided by a higher layer signal.

8. The UE according to claim 5,

wherein the virtual cell identity n^PUSCH_ID is provided by a higher layer signal.