DOWNLINK CONTROL INFORMATION TRANSMITTING METHOD AND BASE STATION, AND DOWNLINK CONTROL INFORMATION RECEIVING METHOD AND USER DEVICE

• US 20120269151A1
• Filed: 11/15/2010
• Published: 10/25/2012
• Est. Priority Date: 11/27/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Moon II, Han, Seung Hee, Chung, Jae Hoon, Park, Kyu Jin
• Granted Patent: US 9,178,670 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• 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: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

In the transmission of user data for a user equipment and control information on the user data to the user equipment using a plurality of carrier waves by a base station in a wireless communication system, the control information can be transmitted over a portion of the plurality of carrier waves, and carrier waves over which only the user data is transmitted can be generated without the control information. Here, the base station transmits, at a certain number of subframes following the subframes at which the control information is transmitted, the user data over the carrier waves to which only the user data is allocated. Thus, the user equipment can minimize the buffering of the user data during the detection of the control information, and decode the user data.

Claims

1. A method for transmitting, by a base station, downlink control information to a user equipment using a plurality of carriers, in a wireless communication system, the method comprises:

allocating user data for the user equipment to the plurality of carriers; and

allocating control information for the user data to at least one of the plurality of carriers;

transmitting the user data and the control information to the user equipment,

wherein, among the plurality of carriers, on a carrier to which only the user data is allocated the user data is transmitted after k subframe from a subframe in which the control information is transmitted, and wherein k is a positive integer.

2. The method of claim 1, wherein k is equal to 1 or 2.

3. The method of claim 1, further comprising:

transmitting information indicating k to the user equipment.

4. The method of claim 1, wherein the control information and k are transmitted through a PDCCH (Physical Downlink Control Channel), and wherein the user data is transmitted through a PDSCH (Physical Downlink Shared Channel).

5. A method of receiving, by a user equipment using a plurality of carriers, downlink control information from a base station, in a wireless communication system, the method comprises:

receiving control information for the user equipment from at least one of the plurality of carriers;

allocating user data for the user equipment to the plurality of carriers; and

receiving user data for the user equipment through the plurality of carriers by using the control information,

wherein, among the plurality of carriers, on a carrier to which only the user data is allocated the user data is received after k subframes from a subframe in which the control information is transmitted, and wherein k is a positive integer.

6. The method of claim 5, wherein k is equal to 1 or 2.

7. The method of claim 5, further comprising:

receiving information indicating k from the base station.

8. The method of claim 5, wherein the control information and k are received through a PDCCH (Physical Downlink Control Channel), and wherein the user data is received through a PDSCH (Physical Downlink Shared Channel).

9. A base station of transmitting downlink control information to a user equipment using a plurality of carriers, in a wireless communication system, the base station comprises:

a transmitter configured to transmit radio signals to the user equipment through the plurality of carriers; and

a processor configured to allocate user data for the user equipment to the plurality of carriers, and to allocate control information for the user data to at least one of the plurality of carriers, wherein the processor is connected to the transmitter and configured to control the transmitter to transmit the user data and the control information to the user equipment, and

wherein the processor controls the transmitter to transmit, on a carrier, to which only the user data is allocated, among the plurality of carriers, the user data is k number of subframes after a subframe to which the control information is being transmitted, and wherein k is a positive integer.

10. The base station of claim 9, wherein the processor is configured to control the transmitter so that k is equal to 1 or 2.

11. The base station of claim 9, wherein the processor is configured to control the transmitter to transmit information indicating k to the user equipment.

12. The base station of claim 9, wherein the processor is configured to control the transmitter to transmit the control information and k through a PDCCH (Physical Downlink Control Channel) and to transmit the user data through a PDSCH (Physical Downlink Shared Channel).

13. A user equipment, using a plurality of carriers, of receiving downlink control information from a base station, in a wireless communication system, the user equipment comprises:

a receiver configured to receive radio signals through the plurality of carriers; and

a processor configured to control the receiver to receive control information for the user equipment on at least one of the plurality of carriers; and

configured to control the receiver to receive user data for the user equipment through the plurality of carriers based on the control information,

wherein the processor controls the receiver to receive, on a carrier allocated with only the user data among the plurality of carriers, the user data after k number of subframes from a subframe in which the control information is transmitted, and wherein k is a positive integer.

14. The user equipment of claim 13, wherein k is equal to 1 or 2.

15. The user equipment of claim 13, wherein the processor is configured to control the receiver to further receive information indicating k from the base station.

16. The user equipment of claim 13, wherein the processor is configured to control the receiver to receive the control information and k through a PDCCH (Physical Downlink Control Channel), and to receive the user data through a PDSCH (Physical Downlink Shared Channel).