Method and apparatus for channel state information measurement in a wireless communication system

• US 10,091,772 B2
• Filed: 01/22/2014
• Issued: 10/02/2018
• Est. Priority Date: 01/22/2013
• Status: Active Grant

• Current Assignee: Innovative Sonic Limited
• Original Assignee: Innovative Sonic Limited
• Inventors: Lin, Ko-Chiang
• Primary Examiner(s): Cho, Un C
• Assistant Examiner(s): Rahman, Shah
• Application Number:
  US14/160,976
• Publication Number:
  US 20140204869A1
• Time in Patent Office: 1,714 Days
• Field of Search: 370329
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties

Abstract

Methods and apparatuses are disclosed to measure channel state information in a wireless communication system. The method includes selecting a subframe to be a reference resource for a channel state information (CSI) report on a Secondary Cell (SCell), in which the subframe is not a downlink (DL) subframe or a special subframe whose downlink portion is longer than a threshold on a Primary Cell (PCell). The method further includes executing a handling.

Claims

1. A method for measuring channel state information in a wireless communication system, the method comprising:

considering a first subframe to be a reference resource on a Secondary Cell (SCell) for a channel state information (CSI) report, wherein the first subframe is a downlink (DL) subframe on the SCell; and

selecting a second subframe, and not the first subframe, as a reference resource on the SCell for the CSI report if the corresponding first subframe is not a DL subframe on a Primary Cell (PCell) or not a TDD (Time Division Duplex) special subframe on the PCell whose downlink portion is above a threshold on the PCell.

2. A method for measuring channel state information (CSI) in a wireless communication system, the method comprising:

configuring Carrier aggregation;

considering a second subframe as a reference resource on a Secondary Cell (SCell) for a CSI report, wherein the second subframe is a downlink (DL) subframe on the SCell; and

selecting, by a user equipment (UE), a first subframe prior to the second subframe as a reference resource on the SCell for the CSI report if the corresponding second subframe is a uplink (UL) subframe on a Primary Cell (PCell) or a TDD (Time Division Duplex) special subframe on the PCell whose downlink portion is below a threshold on the PCell.

3. The method of claim 2, wherein the UE considers a subframe as a reference resource for the CSI report on the SCell if the subframe is a downlink (DL) subframe on the PCell or a TDD special subframe on the PCell whose downlink portion is above a threshold on the PCell.

4. The method of claim 2, wherein at least two carriers aggregated have different UL-DL configurations.

5. The method of claim 2, wherein the UE is not able to receive and transmit simultaneously.

6. A communication device for improving a channel state information (CSI) measurement in a wireless communication system, the communication device comprising:

a control circuit;

a processor installed in the control circuit;

a memory installed in the control circuit and operatively coupled to the processor;

wherein the processor is configured to execute a program code stored in the memory to improve a CSI measurement in a wireless communication system by;

considering selecting a first subframe to be a reference resource on a Secondary Cell (SCell) for a channel state information (CSI) report, wherein the corresponding first subframe is not a downlink (DL) subframe on a Primary Cell (PCell) or not a TDD (Time Division Duplex) special subframe on the PCell whose downlink portion is above a threshold on the PCell and the first subframe is a downlink subframe on the SCell; and

selecting a second subframe, and not the first subframe, as a reference resource on the SCell for the CSI report if the corresponding first subframe is not a downlink (DL) subframe on a Primary Cell (PCell) or not a TDD (Time Division Duplex) special subframe on the PCell whose downlink portion is above a threshold on the PCell.

7. A communication device for improving a channel state information (CSI) measurement in a wireless communication system, the communication device comprising:

a control circuit;

a processor installed in the control circuit;

a memory installed in the control circuit and operatively coupled to the processor;

wherein the processor is configured to execute a program code stored in the memory to improve a CSI measurement in a wireless communication system by;

considering a second subframe as a reference resource on a Secondary Cell (SCell) for a CSI report, wherein the second subframe is a downlink (DL) subframe on the SCell; and

selecting a first subframe prior to the second subframe as a reference resource on the SCell for the CSI report if the corresponding second subframe is a uplink (UL) subframe on a Primary Cell (PCell) or a TDD (Time Division Duplex) special subframe on the PCell whose downlink portion is below a threshold on the PCell.

8. The communication device of claim 7, wherein the program code further comprises:

selecting a subframe as a reference resource for the CSI report on the SCell if in the subframe it is a downlink (DL) subframe or a TDD (Time Division Duplex) special subframe on the PCell whose downlink portion is above a threshold on the PCell.

9. The communication device of claim 7, wherein at least two carriers aggregated have different UL-DL configurations.

10. The communication device of claim 7, wherein the UE is not able to receive and transmit simultaneously.

11. The communication device of claim 7, wherein the UE selects another prior subframe as a valid downlink subframe.

12. The communication device of claim 7, wherein the program code further comprises:

considering a subframe as a reference resource for the CSI report on the SCell if the subframe is a DL subframe on the PCell or a TDD (Time Division Duplex) special subframe on the PCell whose downlink portion is above a threshold on a PCell.