Method and apparatus for transmitting uplink signal in wireless communication system

• US 9,723,598 B2
• Filed: 02/20/2013
• Issued: 08/01/2017
• 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, Seo, Hanbyul, Kim, Kijun, Kim, Byounghoon
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): HOPKINS, MATTHEW A
• Application Number:
  US14/376,365
• Publication Number:
  US 20150029968A1
• Time in Patent Office: 1,623 Days
• Field of Search: 370329
• CPC Class Codes: H04B 1/7143 Arrangements for generation of hop patterns
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• 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
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting an uplink signal. 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 group hopping pattern of the reference signal can be determined on the basis of the virtual cell ID.

Claims

1. A method for transmitting an uplink signal at a user equipment, UE, in a wireless communication system, the method comprising:

when a virtual cell ID, n_ID^PUSCH, for a first reference signal for demodulation of a physical uplink shared channel, PUSCH, is provided, generating, by the UE, the reference signal based on the n_ID^PUSCH; and

transmitting, by the UE, the generated reference signal,

wherein, when n_ID^PUSCH is provided and sequence group hopping for the reference signal is enabled, a pseudo-random sequence generator used to determine a group hopping pattern for the reference signal is initialized according to

2. The method according to claim 1,

wherein, when n_ID^PUSCH is provided, a sequence shift pattern f_ss^PUSCH of the reference signal is determined according to f_ss^PUSCH=n_ID^PUSCHmod30,

wherein mod denotes a modulo operation.

3. The method according to claim 2, wherein, when n_ID^PUSCH is provided, the sequence group hopping for the reference signal is disabled and the sequence hopping is enabled, a pseudo-random sequence generator used to determine a base sequence number v is initialized according to

4. The method according to claim 1, wherein, when n_ID^PUSCH is not provided, the pseudo-random sequence generator used to determine the group hopping pattern for the reference signal is initialized according to

5. The method according to claim 4,

wherein, when n_ID^PUSCH is not provided, the sequence shift pattern f_ss^PUSCH of the reference signal is determined according to f_ss^PUSCH=(N_ID^{cell =Δ}

_ss) mod30,

wherein Δ

_ss ε

{0,1, . . . ,29} is provided by the higher layer.

6. The method according to claim 5, wherein, when n_ID^PUSCH is not provided, the sequence group hopping for the reference signal is disabled and the sequence hopping is enabled, a pseudo-random sequence generator used to determine a base sequence number v is initialized according to

7. The method according to claim 1, wherein the reference signal is transmitted on a single carrier frequency division multiple access, SC-FDMA, symbol in a slot in which the PUSCH is transmitted.

8. A user equipment, UE, for transmitting an uplink signal, comprising:

a receiver;

a transmitter; and

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

when a virtual cell ID n_ID^PUSCH for a reference signal for demodulation of a physical uplink shared channel, PUSCH, is provided, generate the reference signal based on the n_ID^PUSCH; and

control the transmitter to transmit the generated reference signal,

wherein, when N_ID^PUSCH is provided and sequence group hopping for the reference signal is enabled, a pseudo-random sequence generator used to determine a group hopping pattern for the reference signal is initialized according to

9. The UE according to claim 8,

wherein, when n_ID^PUSCH is provided, a sequence shift pattern f_ss^PUSCH of the reference signal is determined according to f_ss^PUSCH=n_ID^PUSCHmod30,

wherein mod denotes a modulo operation.

10. The UE according to claim 9, wherein, when n_ID^PUSCH is provided, the sequence group hopping for the reference signal is disabled and the sequence hopping is enabled, a pseudo-random sequence generator used to determine a base sequence number v is initialized according to

11. The UE according to claim 8, wherein, when n_ID^PUSCH is not provided, the pseudo-random sequence generator used to determine the group hopping pattern for the reference signal is initialized according to

12. The UE according to claim 11,

wherein, when n_ID^PUSCH is not provided, the sequence shift pattern f_ss^PUSCH of the reference signal is determined according to f_ss^PUSCH=(N_ID^{cell =Δ}

_ss)mod30,

wherein Δ

_ssε

{0,1, . . . ,29} is provided by the higher layer.

13. The UE according to claim 12, wherein, when n_ID^PUSCH is not provided, the sequence group hopping for the reference signal is disabled and the sequence hopping is enabled, a pseudo-random sequence generator used to determine a base sequence number v is initialized according to

14. The UE according to claim 8, wherein the reference signal is transmitted on a single carrier frequency division multiple access, SC-FDMA, symbol in a slot in which the PUSCH is transmitted.