APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING CHANNEL QUALITY INFORMATION IN A COMMUNICATION SYSTEM

• US 20090303900A1
• Filed: 08/19/2009
• Published: 12/10/2009
• Est. Priority Date: 01/05/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Sung, Sang-Hoon, Yang, Jang-Hoon, Yoon, Soon-Young, Jang, Ji-Ho, Joo, Pan-Yuh, Roh, Kwan-Hee, CHO, Jae-Hee, Chang, Jae-Hwan, Jeong, Joong-Ho
• Granted Patent: US 8,090,012 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

An apparatus and method for transmitting and receiving Channel Quality Information (CQI) in a communication system. A Base Station (BS) transmits, to a Subscriber Station (SS), a request for CQI of a resource region corresponding to a frequency reuse factor K, which is designated by the BS. The BS then receives, from the SS, the CQI of the resource region corresponding to a channel quality measured by the SS. The channel quality is measured by the SS by measuring a boosted reference signal and compensating the boosted reference signal for a non-boosted signal.

Claims

1. A method for transmitting Channel Quality Information (CQI) by a Subscriber Station (SS) in a communication system, the method comprising:

receiving, from a Base Station (BS), a request for CQI of a resource region corresponding to a frequency reuse factor K, which is designated by the BS;

measuring, by the SS, channel quality of the resource region corresponding to the frequency reuse factor K, in response to the request for CQI, by measuring a boosted reference signal and compensating the boosted reference signal for a non-boosted signal; and

transmitting, to the BS, the CQI of the resource region corresponding to the measured channel quality.

2. The method of claim 1, wherein the channel quality is measured as a Carrier-to-Interference and Noise Ratio (CINR) measured from a preamble signal or a specific subchannel region.

3. The method of claim 1, wherein the frequency reuse factor K is a positive integer, and is defined such that one frequency band is repeatedly used in K cells.

4. The method of claim 1, wherein the request for the CQI of the resource region includes a bit value for instructing the SS to report a Carrier-to-Interference and Noise Ratio (CINR) measured from a preamble signal for one of frequency reuse factor K=1 and frequency reuse factor K=3.

5. The method of claim 1, wherein the communication system utilizes frames, each of the frames including at least one allocation region, and

wherein a frequency reuse factor is individually set in each of the at least one allocation region.

6. The method of claim 1, wherein the resource region includes one of a preamble region, a Partial Usage of SubChannels (PUSC) allocation region, a Full Usage of SubChannels (FUSC) allocation region, an optional FUSC allocation region, and a Band Adaptive Modulation &

Coding (Band AMC) allocation region.

7. A method for receiving Channel Quality Information (CQI) by a Base Station (BS) in a communication system, the method comprising:

transmitting, to a Subscriber Station (SS), a request for CQI of a resource region corresponding to a frequency reuse factor K, which is designated by the BS; and

receiving, from the SS, the CQI of the resource region corresponding to a channel quality measured by the SS,

wherein the channel quality is measured by measuring a boosted reference signal and compensating the boosted reference signal for a non-boosted signal.

8. The method of claim 7, wherein the channel quality is measured as a Carrier-to-Interference and Noise Ratio (CINR) measured from a preamble signal or a specific subchannel region.

9. The method of claim 7, wherein the frequency reuse factor K is a positive integer, and is defined such that one frequency band is repeatedly used in K cells.

10. The method of claim 7, wherein the request for CQI includes a bit value for instructing the SS to report a Carrier-to-Interference and Noise Ratio (CINR) measured from a preamble signal for one of frequency reuse factor K=1 and frequency reuse factor K=3.

11. The method of claim 7, wherein the communication system utilizes frames, each of the frames including at least one allocation region, and

wherein a frequency reuse factor is individually set in each of the at least one allocation region.

12. The method of claim 7, wherein the resource region includes one of a preamble region, a Partial Usage of SubChannels (PUSC) allocation region, a Full Usage of SubChannels (FUSC) allocation region, an optional FUSC allocation region, and a Band Adaptive Modulation &

Coding (Band AMC) allocation region.

13. An apparatus for transmitting Channel Quality Information (CQI) in a Subscriber Station (SS) of a communication system, the apparatus comprising:

a receiver for receiving, from a Base Station (BS), a request for CQI of a resource region corresponding to a frequency reuse factor K, which is designated by the BS;

a channel quality measurer for measuring channel quality for the resource region corresponding to the frequency reuse factor K by measuring a boosted reference signal and compensating the boosted reference signal for a non-boosted signal; and

a transmission unit for transmitting the CQI of the resource region corresponding to the measured channel quality to the BS.

14. The apparatus of claim 13, wherein the channel quality is measured as a Carrier-to-Interference and Noise Ratio (CINR) measured from a preamble signal or a specific subchannel region.

15. The apparatus of claim 13, wherein the frequency reuse factor K is a positive integer, and is defined such that one frequency band is repeatedly used in K cells.

16. The apparatus of claim 13, wherein the request for the CQI of the resource region includes a bit value for instructing the SS to report a Carrier-to-Interference and Noise Ratio (CINR) measured from a preamble signal for one of frequency reuse factor K=1 and frequency reuse factor K=3.

17. The apparatus of claim 13, wherein the communication system utilizes frames, each of the frames including at least one allocation region, and

wherein a frequency reuse factor is individually set in each of the at least one allocation region.

18. The apparatus of claim 13, wherein the resource region is one of a preamble region, a Partial Usage of SubChannels (PUSC) allocation region, a Full Usage of SubChannels (FUSC) allocation region, an optional FUSC allocation region, and a Band Adaptive Modulation &

Coding (Band AMC) allocation region.

19. An apparatus for receiving Channel Quality Information (CQI) in a Base Station (BS) of a communication system, the apparatus comprising:

a scheduler for transmitting, to a Subscriber Station (SS), a request for CQI of a resource region corresponding to a frequency reuse factor K, which is designated by the BS; and

a receiver for receiving, from the SS, the CQI of the resource region corresponding to a channel quality measured by the SS and providing the CQI of the resource region to the scheduler to be used for performing scheduling,

wherein the channel quality is measured by measuring a boosted reference signal and compensating the boosted reference signal for a non-boosted signal.

20. The apparatus of claim 19, wherein the channel quality is measured as a Carrier-to-Interference and Noise Ratio (CINR) measured from a preamble signal or a specific subchannel region.

21. The apparatus of claim 19, wherein the frequency reuse factor K is a positive integer, and is defined such that one frequency band is repeatedly used in K cells.

22. The apparatus of claim 19, wherein the request for CQI of the resource region includes a bit value for instructing the SS to report a Carrier-to-Interference and Noise Ratio (CINR) measured from a preamble signal for one of frequency reuse factor K=1 and frequency reuse factor K=3.

23. The apparatus of claim 19, wherein the communication system utilizes frames, each of the frames including at least one region, and

wherein a frequency reuse factor is individually set in each of the at least one allocation region

24. The apparatus of claim 19, wherein the resource region comprises one of a preamble region, a Partial Usage of SubChannels (PUSC) allocation region, a Full Usage of SubChannels (FUSC) allocation region, an optional FUSC allocation region, and a Band Adaptive Modulation &

Coding (Band AMC) allocation region.