METHOD FOR RECEIVING UPLINK SIGNAL, BASE STATION, METHOD FOR TRANSMITTING UPLINK SIGNAL AND USER EQUIPMENT

• US 20140301345A1
• Filed: 11/19/2012
• Published: 10/09/2014
• Est. Priority Date: 11/17/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hakseong, Kim, Byounghoon
• Granted Patent: US 9,408,200 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04J 13/0062 Zadoff-Chu
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A predetermined number of cyclic shift values are defined for a demodulation of uplink data. An available portion of the cyclic shift values from among the cyclic shift values is transmitted to user equipment. Control information for uplink data is transmitted to the user equipment via a physical control channel. The control information includes information indicating one cyclic shift value for generating a reference signal from among the portion of the cyclic shift values. The user equipment transmits the uplink data based on the control information and a reference signal for a demodulation of the uplink data.

Claims

1. A method for receiving an uplink signal by a base station, the method comprising:

transmitting information indicating partial cyclic shift values usable by a user equipment among a predetermined number of cyclic shift values;

transmitting control information for uplink data to the user equipment through a physical control channel; and

receiving the uplink data according to the control information and receiving a reference signal for demodulation of the uplink data,

wherein the control information includes information indicating one cyclic shift value for generating the reference signal among the partial cyclic shift values.

2. The method according to claim 1, wherein the information indicating the partial cyclic shift values includes information indicating a plurality of parameter sets, each set including one or more cyclic shift values among the predetermined number of cyclic shift values.

3. The method according to claim 2, wherein the plural parameter sets are used in different time resources.

4. The method according to claim 3, wherein the one cyclic shift value is included in a parameter set corresponding to a time resource in which the reference signal is received among the plural parameter sets.

5. The method according to claim 2, further comprising

transmitting information indicating a mapping relationship between the plural parameter sets and the time resources to the user equipment.

6. The method according to claim 1, wherein the partial cyclic shift values are differently configured from cyclic shift values used by a neighboring base station in the same time resource.

7. A base station for receiving an uplink signal, the base station comprising:

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

a processor configured to control the RF unit,

wherein the processor controls the RF unit to transmit information indicating partial cyclic shift values usable by a user equipment among a predetermined number of cyclic shift values, controls the RF unit to transmit control information for uplink data to the user equipment through a physical control channel, and controls the RF unit to receive the uplink data according to the control information and receive a reference signal for demodulation of the uplink data, and wherein the control information includes information indicating one cyclic shift value for generating the reference signal among the partial cyclic shift values.

8. A method for transmitting an uplink signal by a user equipment, the method comprising:

receiving information indicating partial cyclic shift values usable by the user equipment among a predetermined number of cyclic shift values;

receiving control information for uplink data through a physical control channel; and

transmitting the uplink data according to the control information and transmitting a reference signal for demodulation of the uplink data,

wherein the control information includes information indicating one cyclic shift value for generating the reference signal among the partial cyclic shift values.

9. The method according to claim 8, wherein the information indicating the partial cyclic shift values includes information indicating a plurality of parameter sets, each set including one or more cyclic shift values among the predetermined number of cyclic shift values.

10. The method according to claim 9, wherein the plural parameter sets are used in different time resources.

11. The method according to claim 10, wherein the one cyclic shift value is included in a parameter set corresponding to a time resource in which the reference signal is received among the plural parameter sets.

12. The method according to claim 10, further comprising

receiving information indicating a mapping relationship between the plural parameter sets and the time resources.

13. A user equipment for transmitting an uplink signal, the user equipment comprising:

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

a processor configured to control the RF unit,

wherein the processor controls the RF unit to receive information indicating partial cyclic shift values usable by the user equipment among a predetermined number of cyclic shift values, controls the RF unit to receive control information for uplink data through a physical control channel, and controls the RF unit to transmit the uplink data according to the control information and transmit a reference signal for demodulation of the uplink data, and wherein the control information includes information indicating one cyclic shift value for generating the reference signal among the partial cyclic shift values.