METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING MULTI-USER CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE ANTENNAS

• US 20110085506A1
• Filed: 10/12/2010
• Published: 04/14/2011
• Est. Priority Date: 10/09/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, In Ho, Nam, Young Han, Han, Jin Kyu, Ji, Hyoung Ju, Cho, Joon Young
• Granted Patent: US 9,712,305 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided

Abstract

Provided are a method and apparatus for transmitting and receiving multi-user control channels through a data channel region in a wireless communication system using multiple antennas. Further provided is a definition of a new search space for control channel candidates. In the transmitting method, a base station forms control channels for a plurality of user equipment each of which is composed of at least one resource block, performs a mapping for the control channels by dividing a space of the same transmission region in a data channel region of a sub-frame, and then multiplexes the control channels with data channels in the data channel region of the sub-frame and to transmit the multiplexed control channels.

Claims

1. A method for transmitting multi-user control channels, the method comprising:

mapping control channels for a plurality of user equipments by dividing space of the same transmission region in a data channel region of a sub-frame, each user equipment being composed of at least one resource block; and

multiplexing the control channels with data channels in the data channel region of the sub-frame and then transmitting the multiplexed control channels.

2. The method of claim 1, wherein the mapping of the control channels includes performing a mapping by differentiating the control channels in the same transmission region according to a demodulation reference signal for each user equipment.

3. The method of claim 2, wherein the mapping of the control channels includes:

determining control channel candidates for transmission of each control channel in the data channel region according to the number of resource blocks in the data channel region, the number of resource blocks for the control channels, and the number of the demodulation reference signals; and

performing a mapping of the control channels by individually selecting the control channel candidates for the user equipment.

4. The method of claim 3, further comprising:

instructing the user equipment to receive the control channels in the data channel region.

5. A method for receiving multi-user control channels, the method comprising:

determining a transmission region in which control channels for a plurality of user equipments are space-divided and mapped in a data channel region of a sub-frame, each user equipment being composed of at least one resource block; and

receiving one of the control channels by decoding the transmission region in the data channel region.

6. The method of claim 5, wherein the control channels are mapped by being differentiated from each other in the transmission region according to each demodulation reference signal.

7. The method of claim 6, wherein determining the transmission region includes determining control channel candidates for transmission of the control channel in the data channel region according to the number of resource blocks in the data channel region, the number of resource blocks for the control channels, and the number of the demodulation reference signals,

and wherein the receiving of the control channel includes individually decoding the control channel candidates.

8. An apparatus for transmitting multi-user control channels, the apparatus comprising:

a scheduler configured to forming control channels for a plurality of user equipments each of which is composed of at least one resource block;

a mapping unit configured to perform a mapping for the control channels by dividing a space of the same transmission region in a data channel region of a sub-frame; and

a multiplexer configured to multiplex the control channels with data channels in the data channel region of the sub-frame and then to transmit the multiplexed control channels.

9. The apparatus of claim 8, wherein the mapping unit is further configured to perform a mapping by differentiating the control channels in the same transmission region according to a demodulation reference signal for each user equipment.

10. The apparatus of claim 9, further comprising:

a controller configured to determine control channel candidates for transmission of each control channel in the data channel region according to the number of resource blocks in the data channel region, the number of resource blocks for the control channels, and the number of the demodulation reference signals, and to control a mapping of the control channels by individually selecting the control channel candidates for the user equipments.

11. The apparatus of claim 10, wherein the controller is further configured to instruct the user equipment to receive the control channels in the data channel region.

12. An apparatus for receiving multi-user control channels, the apparatus comprising:

a controller configured to determine a transmission region in which control channels for a plurality of user equipments are space-divided and mapped in a data channel region of a sub-frame, each user equipment being composed of at least one resource block; and

a decoder configured to receive one of the control channels by decoding the transmission region in the data channel region under the control of the controller.

13. The apparatus of claim 12, wherein the control channels are mapped by being differentiated from each other in the transmission region according to each demodulation reference signal.

14. The apparatus of claim 13, wherein the control unit is further configured to determine control channel candidates for transmission of the control channel in the data channel region according to the number of resource blocks in the data channel region, the number of resource blocks for the control channels, and the number of the demodulation reference signals, and to control an individual decoding of the control channel candidates.