Method and apparatus for generating an uplink reference signal sequence in a wireless communication system

• US 9,843,466 B2
• Filed: 01/26/2017
• Issued: 12/12/2017
• Est. Priority Date: 01/07/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ko, Hyun Soo, Noh, Min Seok, Chung, Jae Hoon, Han, Seung Hee, Lee, Moon Il
• Primary Examiner(s): Lai, Andrew
• Assistant Examiner(s): Ganguly, Sumitra
• Application Number:
  US15/416,706
• Publication Number:
  US 20170149593A1
• Time in Patent Office: 320 Days
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04J 13/0062 Zadoff-Chu
• CPC Class Codes: H04J 13/0074 Code shifting or hopping
• CPC Class Codes: H04J 2211/005 Long term evolution [LTE]
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0082 at predetermined intervals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A method for disabling a sequence group hopping by a user equipment (UE) in a wireless communication system, the method includes receiving a cell-specific sequence group hopping parameter from a base station, wherein the cell-specific sequence group hopping parameter is used to enable the sequence group hopping for a plurality of UEs, including the UE, in a cell; receiving a UE-specific sequence group hopping parameter from the base station, wherein the UE-specific sequence group hopping parameter is used to disable the sequence group hopping for the UE; and disabling the sequence group hopping by the UE-specific sequence group hopping parameter.

Claims

1. A method for disabling a sequence group hopping by a user equipment (UE) in a wireless communication system, the method comprising:

receiving a cell-specific sequence group hopping parameter from a base station, wherein the cell-specific sequence group hopping parameter is used to enable the sequence group hopping for a plurality of UEs, including the UE, in a cell;

receiving a UE-specific sequence group hopping parameter from the base station, wherein the UE-specific sequence group hopping parameter is used to disable the sequence group hopping for the UE; and

disabling the sequence group hopping for the UE by the UE-specific sequence group hopping parameter.

2. The method of claim 1, wherein the cell-specific sequence group hopping parameter is a Group-hopping-enabled parameter received from the base station via a radio resource control (RRC) layer.

3. The method of claim 1, wherein the UE-specific sequence group hopping parameter is a Disable-sequence-group-hopping parameter received from the base station via a radio resource control (RRC) layer.

4. The method of claim 1, wherein disabling the sequence group hopping for the UE by the UE-specific sequence group hopping parameter comprises:

generating a reference signal sequence based on a sequence group number, the sequence group number being determined by the UE-specific sequence group hopping parameter.

5. The method of claim 4, wherein the sequence group number is identical with each of other sequence group numbers for each slot.

6. The method of claim 4, wherein the sequence group number is defined by a group hopping pattern and a sequence shift pattern in each slot.

7. The method of claim 6, wherein the group hopping pattern is set to 0 by the UE-specific sequence group hopping parameter.

8. The method of claim 4, wherein the sequence group number is determined by Equation below:

u=(f_gh(n_s)+f_ss)mod 30,

where n_s denotes a slot number in a frame, f_ss denotes a sequence shift pattern configured by a cell identifier (ID) and a higher layer, and f_gh(n_s) is a group hopping pattern which is set to 0 according to the UE-specific sequence group hopping parameter.

9. A user equipment (UE) in a wireless communication system, the UE comprising:

a radio frequency (RF) unit configured to transmit or receive a radio signal; and

a processor, coupled to the RF unit, wherein the processor is configured to;

control the RF unit to receive a cell-specific sequence group hopping parameter from a base station, wherein the cell-specific sequence group hopping parameter is used to enable a sequence group hopping for a plurality of UEs, including the UE, in a cell,

control the RF unit to receive a UE-specific sequence group hopping parameter from the base station, wherein the UE-specific sequence group hopping parameter is used to disable the sequence group hopping for the UE, and

disable the sequence group hopping for the UE by the UE-specific sequence group hopping parameter.

10. The UE of claim 9, wherein the cell-specific sequence group hopping parameter is a Group-hopping-enabled parameter received from the base station via a radio resource control (RRC) layer.

11. The UE of claim 9, wherein the UE-specific sequence group hopping parameter is a Disable-sequence-group-hopping parameter received from the base station via a radio resource control (RRC) layer.

12. The UE of claim 9, wherein disabling the sequence group hopping for the UE by the UE-specific sequence group hopping parameter comprises:

generating a reference signal sequence based on a sequence group number, the sequence group number being determined by the UE-specific sequence group hopping parameter.

13. The UE of claim 12, wherein the sequence group number is identical with each of other sequence group numbers for each slot.

14. The UE of claim 12, wherein the sequence group number is defined by a group hopping pattern and a sequence shift pattern in each slot.

15. The UE of claim 14, wherein the group hopping pattern is set to 0 by the UE-specific sequence group hopping parameter.

16. The UE of claim 12, wherein the sequence group number is determined by Equation below:

u=(f_gh(n_s)+f_ss)mod 30,

where n_s denotes a slot number in a frame, f_ss denotes a sequence shift pattern configured by a cell identifier (ID) and a higher layer, and f_gh(n_s) is a group hopping pattern which is set to 0 according to the UE-specific sequence group hopping parameter.