Apparatus and method for scheduling resource in a multiuser MIMO radio communication system

• US 20050043031A1
• Filed: 08/18/2004
• Published: 02/24/2005
• Est. Priority Date: 08/18/2003
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd., Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Samsung Electronics Co. Ltd., Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Cho, Sung-Hyun, Chung, Jae-Hak, Airy, Manish, Park, Won-Hyoung, Heath, Robert W.
• Application Number:
  US10/920,785
• Publication Number:
  US 20050043031A1
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

In a multiuser Multiple Input Multiple Output (MIMO) radio communication system, a transmitter receives channel quality information transmitted from receivers, schedules resource for the receivers within a corresponding scheduling epoch based on the received channel quality information. Thereafter, the transmitter pre-codes signals to be transmitted to the resource-scheduled receivers in a predetermined coding method before transmission, thereby maximizing system transmission efficiency.

Claims

1. A method for scheduling radio communication system resources by a transmitter in a multiuser Multiple Input Multiple Output (MIMO) radio communication system, the method comprising the steps of:

receiving channel quality information received from receivers;

scheduling resources for the receivers within a corresponding scheduling epoch based on the received channel quality information; and

pre-coding signals to be transmitted to the resource-scheduled receivers in a predetermined coding method.

2. The method of claim 1, wherein the scheduling of resources is based on at least one of the channel quality information received from the receivers, service quality priorities of the receivers, and transmission data sizes for the receivers.

3. The method of claim 1, wherein the pre-coding of signals is based on at least one of a reception method of the receivers and an entire transmission efficiency of the system.

4. The method of claim 1, wherein the predetermined coding method is a dirty paper coding method.

5. The method of claim 1, wherein the channel quality information of the receivers is transmitted over a reverse logical control channel.

6. The method of claim 1, further comprising the step of, after scheduling resource for the receivers, transmitting the resource scheduling information to the resource-scheduled receivers over a forward logical control channel.

7. The method of claim 6, wherein the resource scheduling information includes at least one of time slot information assigned to the receivers, frequency tone information and transmission method information.

8. A method for scheduling radio communication system resources by a receiver in a multiuser Multiple Input Multiple Output (MIMO) radio communication system, the method comprising the steps of:

receiving resource scheduling information assigned to the receiver;

receiving a signal, demodulating the received signal in a reception method corresponding to a transmission method used in a transmitter, and detecting channel quality information to be used during resource scheduling;

quantizing the detected channel quality information; and

transmitting the quantized channel quality information to the transmitter.

9. The method of claim 8, wherein the resource scheduling information is received over a forward logical control channel.

10. The method of claim 9, wherein the resource scheduling information includes at least one of time slot information assigned to the receiver, frequency tone information and transmission method information.

11. The method of claim 8, wherein the channel quality information is transmitted over a reverse logical control channel.

12. An apparatus for scheduling radio communication system resources by a transmitter in a multiuser Multiple Input Multiple Output (MIMO) radio communication system, the apparatus comprising:

a pre-selector for pre-selecting receivers to be resource-scheduled within a corresponding scheduling epoch based on channel quality information received from receivers; and

a transmission pre-coder for pre-coding signals to be transmitted to the receivers pre-selected by the pre-selector in a predetermined coding method.

13. The apparatus of claim 12, wherein the pre-selector pre-selects receivers according to at least one of the channel quality information received from the receivers, service quality priorities of the receivers, and transmission data sizes for the receivers.

14. The apparatus of claim 12, wherein the pre-coder pre-codes signals to be transmitted to the pre-selected receivers based on at least one of a reception method of the receivers and an entire transmission efficiency of the system.

15. The apparatus of claim 12, wherein the predetermined coding method is a dirty paper coding method.

16. The apparatus of claim 12, wherein the channel quality information of the receivers is transmitted over a reverse logical control channel.

17. An apparatus for scheduling radio communication system resources by a receiver in a multiuser Multiple Input Multiple Output (MIMO) radio communication system, the apparatus comprising:

a reception method selector for receiving a signal, demodulating the received signal in a reception method corresponding to a transmission method used in a transmitter, and detecting channel quality information to be used during resource scheduling;

a quantizer for quantizing the detected channel quality information; and

a feedback information transmitter for transmitting the quantized channel quality information to the transmitter.

18. The apparatus of claim 17, wherein the reception method selector receives resource scheduling information over a forward logical control channel, and the resource scheduling information includes at least one of time slot information assigned to the receivers, frequency tone information and transmission method information.

19. The apparatus of claim 17, wherein the feedback transmitter transmits the channel quality information over a reverse logical control channel.