Method and system for transmitting channel state information in wireless communication systems

• US 8,971,261 B2
• Filed: 05/25/2011
• Issued: 03/03/2015
• Est. Priority Date: 06/02/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Nam, Young-Han, Zhang, Jianzhong, Han, Jin-Kyu
• Primary Examiner(s): Roberts, Brian
• Assistant Examiner(s): HAQUE, ABUSAYEED M
• Application Number:
  US13/115,900
• Publication Number:
  US 20110299484A1
• Time in Patent Office: 1,378 Days
• Field of Search: 370/329
• US Class Current: 370/329
• CPC Class Codes: H04J 3/16 in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted H04J3/17, H04J3/24 take precedence
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• 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 1/0073 Special arrangements for feedback channel
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A base station includes a transmit path circuitry to transmit an uplink grant in a DCI format to a subscriber station. The base station also includes a receive path circuitry to receive only UCI on a PUSCH from a subscriber station when the uplink grant includes a MCS of an enabled transport block (TB) with a value of 29, or a redundancy version of the PUSCH with a value of 1; a CSI request field with a non-zero value; and a total number of physical resource blocks allocated for the subscriber station, N_PRB, with a value less than or equal to a threshold number of physical resource blocks, T_PRB. T_PRB is based at least partly upon one of a total number of CSI information bits to be transmitted on the PUSCH, N_total, and a number of DL CCs reported in a current CSI reporting, N_CCs.

Claims

1. A base station, comprising:

receive path circuitry configured to receive only Uplink Control Information (UCI) on a Physical Uplink Shared CHannel (PUSCH) from a subscriber station when an uplink grant to the subscriber station includes;

either a modulation and coding scheme (MCS) of an enabled transport block (TB) with a value of 29 or a redundancy version of the PUSCH with a value of 1,

a channel state information (CSI) request field with a non-zero value, and

a total number of physical resource blocks N_PRB allocated for the subscriber station with a value less than or equal to a threshold number of physical resource blocks T_PRB,

wherein the threshold number of physical resource blocks varies based at least partly upon a number of downlink component carriers (DL CCs) reported in current CSI reporting.

2. The base station according to claim 1, wherein the CSI request field has a non-zero value when carrier aggregation is configured.

3. The base station according to claim 1, wherein the CSI request field has a non-zero value when either carrier aggregation is not configured.

4. The base station according to claim 1, wherein the CSI request field has a non-zero value when carrier aggregation is configured and a Downlink Control Information (DCI) is transmitted in a search space specific to the subscriber station.

5. The base station according to claim 1, wherein the CSI request field has a non-zero value when either carrier aggregation is not configured or a Downlink Control Information (DCI) is transmitted in a search space specific to a cell.

6. The base station according to claim 1, wherein the total number of physical resource blocks N_PRB allocated for the subscriber station is less than or equal to 4 when the CSI request field has a non-zero, two bit value set for CSI reporting.

7. The base station according to claim 1, wherein the total number of physical resource blocks N_PRB allocated for the subscriber station is less than or equal to 4 when the CSI request field has a non-zero, one bit value set for CSI reporting.

8. A method, comprising:

receiving only Uplink Control Information (UCI) at a base station on a Physical Uplink Shared CHannel (PUSCH) from a subscriber station when an uplink grant to the subscriber station includes;

either a modulation and coding scheme (MCS) of an enabled transport block (TB) with a value of 29 or a redundancy version of the PUSCH with a value of 1,

a channel state information (CSI) request field with a non-zero value, and

a total number of physical resource blocks N_PRB allocated for the subscriber station with a value less than or equal to a threshold number of physical resource blocks T_PRB,

wherein the threshold number of physical resource blocks varies based at least partly upon a number of downlink component carriers (DL CCs) reported in current CSI reporting.

9. The method according to claim 8, wherein the CSI request field has a non-zero value when carrier aggregation is configured.

10. The method according to claim 8, wherein the CSI request field has a non-zero value when either carrier aggregation is not configured.

11. The method according to claim 8, wherein the CSI request field has a non-zero value when carrier aggregation is configured and a Downlink Control Information (DCI) is transmitted in a search space specific to the subscriber station.

12. The method according to claim 8, wherein the CSI request field has a non-zero value when either carrier aggregation is not configured or a Downlink Control Information (DCI) is transmitted in a search space specific to a cell.

13. The method according to claim 8, wherein the total number of physical resource blocks N_PRB allocated for the subscriber station is less than or equal to 4 when the CSI request field has a non-zero, two bit value set for CSI reporting.

14. The method according to claim 8, wherein the total number of physical resource blocks N_PRB allocated for the subscriber station is less than or equal to 4 when the CSI request field has a non-zero, one bit value set for CSI reporting.

15. A subscriber station, comprising:

a transmitter configured to transmit only Uplink Control Information (UCI) on a Physical Uplink Shared CHannel (PUSCH) to a base station when an uplink grant to the subscriber station includes;

either a modulation and coding scheme (MCS) of an enabled transport block (TB) with a value of 29 or a redundancy version of the PUSCH with a value of 1,

a channel state information (CSI) request field with a non-zero value, and

a total number of physical resource blocks N_PRB allocated for the subscriber station with a value less than or equal to a threshold number of physical resource blocks T_PRB,

wherein the threshold number of physical resource blocks varies based at least partly upon a number of downlink component carriers (DL CCs) reported in current CSI reporting.

16. The subscriber station according to claim 15, wherein the CSI request field has a non-zero value when carrier aggregation is configured.

17. The subscriber station according to claim 15, wherein the CSI request field has a non-zero value when either carrier aggregation is not configured.

18. The subscriber station according to claim 15, wherein the CSI request field has a non-zero value when carrier aggregation is configured and a Downlink Control Information (DCI) is transmitted in a search space specific to the subscriber station.

19. The subscriber station according to claim 15, wherein the CSI request field has a non-zero value when either carrier aggregation is not configured or a Downlink Control Information (DCI) is transmitted in a search space specific to a cell.

20. The subscriber station according to claim 15, wherein the total number of physical resource blocks N_PRB allocated for the subscriber station is less than or equal to 4 when the CSI request field has a non-zero, two bit value set for CSI reporting.

21. The subscriber station according to claim 15, wherein the total number of physical resource blocks N_PRB allocated for the subscriber station is less than or equal to 4 when the CSI request field has a non-zero, one bit value set for CSI reporting.

22. A method, comprising:

transmitting only Uplink Control Information (UCI) to a base station on a Physical Uplink Shared CHannel (PUSCH) from a subscriber station when an uplink grant to the subscriber station includes;

either a modulation and coding scheme (MCS) of an enabled transport block (TB) with a value of 29 or a redundancy version of the PUSCH with a value of 1,

a channel state information (CSI) request field with a non-zero value, and

a total number of physical resource blocks N_PRB allocated for the subscriber station with a value less than or equal to a threshold number of physical resource blocks T_PRB,

wherein the threshold number of physical resource blocks varies based at least partly upon a number of downlink component carriers (DL CCs) reported in current CSI reporting.

23. The method according to claim 22, wherein the CSI request field has a non-zero value when carrier aggregation is configured.

24. The method according to claim 22, wherein the CSI request field has a non-zero value when either carrier aggregation is not configured.

25. The method according to claim 22, wherein the CSI request field has a non-zero value when carrier aggregation is configured and a Downlink Control Information (DCI) is transmitted in a search space specific to the subscriber station.

26. The method according to claim 22, wherein the CSI request field has a non-zero value when either carrier aggregation is not configured or a Downlink Control Information (DCI) is transmitted in a search space specific to a cell.

27. The method according to claim 22, wherein the total number of physical resource blocks N_PRB allocated for the subscriber station is less than or equal to 4 when the CSI request field has a non-zero, two bit value set for CSI reporting.

28. The method according to claim 22, wherein the total number of physical resource blocks N_PRB allocated for the subscriber station is less than or equal to 4 when the CSI request field has a non-zero, one bit value set for CSI reporting.