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

Patent metadata

Field	Value
Publication number	US-9270439-B2
Application number	US-201514635879-A
Country	US
Kind code	B2
Filing date	Mar 2, 2015
Priority date	Jun 2, 2010
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

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 .

First claim

What is claimed is:

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:
a modulation and coding scheme (MCS) of an enabled transport block (TB) with a value of 29,
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 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:
a modulation and coding scheme (MCS) of an enabled transport block (TB) with a value of 29,
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 Uplink Control Information (UCI) on a Physical Uplink Shared CHannel (PUSCH) to a base station when an uplink grant to the subscriber station includes:
a modulation and coding scheme (MCS) of an enabled transport block (TB) with a value of 29,
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:
a modulation and coding scheme (MCS) of an enabled transport block (TB) with a value of 29,
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 c

Assignees

• Samsung Electronics Co Ltd

Inventors

• Nam Young-Han
• Zhang Jianzhong
• Han Jin-Kyu

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04L47/10

  Flow control; Congestion control · CPC title

• H04J3/16

  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 title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title