METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING CHANNEL STATE INFORMATION

• US 20150271812A1
• Filed: 06/05/2015
• Published: 09/24/2015
• Est. Priority Date: 09/27/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Nam, Young-Han, Ng, Boon Loong, Lee, Hyojin, Sayana, Krishna, van der Velde, Himke, Zhang, Jianzhong
• Granted Patent: US 9,408,201 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• 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 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

A method for CSI report transmission includes detecting a collision in a subframe, between a first PUCCH CSI report of one serving cell with which a UE is configured in one of transmission modes 1 to 9, and a second PUCCH CSI report of another serving cell with which the UE is configured in transmission mode 10. Upon the reporting types of the collided PUCCH CSI reports having a same priority, the method transmits the first PUCCH CSI report if the CSI process index of the second PUCCH CSI report has a positive value other than 1. A method for CSI report transmission includes configuring, via a higher layer, a UE configured in transmission mode 10 whether to create a respective CSI report(s) for each aperiodic CSI process or not, using an information element including at least three one-bit variables.

Claims

1. A method for transmitting channel state information (CSI) report using a physical uplink control channel (PUCCH) in a wireless network where a plurality of cells is configured to cooperate to communicate to a user equipment (UE) with carrier aggregation (CA), the method comprising:

detecting a collision, in a subframe, between a first CSI report of a first serving cell with which the UE is configured in a first transmission mode, and a second CSI report of a second serving cell with which the UE is configured in a second transmission mode;

comparing a priority of the first CSI report and a priority of the second CSI report; and

when the priority of the first CSI report matches and the priority of the second CSI report, transmitting the first CSI report if a CSI process index of the second CSI report has a positive value other than 1.

2. The method of claim 1, further comprising:

dropping a PUCCH CSI report having a higher serving cell index from the first CSI report and the second CSI report if the CSI process index of the second CSI report is equal to 1.

3. The method of claim 1, further comprising:

dropping the second CSI report corresponding to the CSI process index having the positive value other than 1.

4. The method of claim 1, wherein the first transmission mode is one of transmission modes 1 to 9 in which one periodic CSI reporting mode for each serving cell is configured by higher-layer signalling, and the second transmission mode is a transmission mode 10 in which one or more periodic CSI reporting modes for each serving cell are configured by higher-layer signalling.

5. An apparatus capable of transmitting channel state information (CSI) report using a physical uplink control channel (PUCCH) in a wireless network where a plurality of cells is configured to cooperate to communicate with a user equipment (UE) with carrier aggregation (CA), the apparatus comprising a processing circuitry configured to:

detect a collision, in a subframe, between a first CSI report of a first serving cell with which the UE is configured in a first transmission mode, and a second CSI report of a second serving cell with which the UE is configured in a second transmission mode;

compare a priority of the first CSI report and a priority of the second CSI report; and

when the priority of the first CSI report matches and the priority of the second CSI report, transmit the first CSI report if a CSI process index of the second CSI report has a positive value other than 1.

6. The apparatus of claim 5, wherein the processing circuitry is further configured to:

drop a PUCCH CSI report having a higher serving cell index from the first CSI report and the second CSI report if the CSI process index of the second CSI report is equal to 1.

7. The apparatus of claim 5, wherein the processing circuitry is further configured to:

dropping the second CSI report corresponding to the CSI process index having the positive value other than 1.

8. The apparatus of claim 5, wherein the first transmission mode is one of transmission modes 1 to 9 in which one periodic CSI reporting mode for each serving cell is configured by higher-layer signalling, and the second transmission mode is a transmission mode 10 in which one or more periodic CSI reporting modes for each serving cell are configured by higher-layer signalling.

9. A method for receiving channel state information (CSI) report using a physical uplink control channel (PUCCH) in a wireless network where a plurality of cells is configured to cooperate for a user equipment (UE) with carrier aggregation (CA), the method comprising:

detecting a collision in a frame, between a first CSI report of a first serving cell with which the UE is configured in a first transmission mode, and a second CSI report of a second serving cell with which the UE is configured in a second transmission mode;

comparing priorities of reporting types of the first CSI report and the second CSI reports; and

when the reporting types of the first CSI report and the second CSI report have a same priority, configuring the UE to transmit the first CSI report if the CSI process index of the second CSI report has a positive value other than 1.

10. The method of claim 9, further comprising:

dropping a CSI report having a higher serving cell index from the first CSI report and the second CSI reports if the CSI process index of the second CSI report is equal to 1.

11. The method of claim 9, further comprising:

configuring the UE to drop the second CSI report corresponding to the CSI process index having the positive value other than 1.

12. The method of claim 9, wherein the first transmission mode is one of transmission modes 1 to 9 in which one periodic CSI reporting mode for each serving cell is configured by higher-layer signalling, and the second transmission mode is a transmission mode 10 in which one or more periodic CSI reporting modes for each serving cell are configured by higher-layer signalling.

13. An apparatus capable of receiving channel state information (CSI) report using a physical uplink control channel (PUCCH) in a wireless network where a plurality of cells is configured to cooperate for a user equipment (UE) with carrier aggregation (CA), the apparatus comprising a processing circuitry configured to:

detect a collision in a frame, between a first CSI report of a first serving cell with which the UE is configured in a first transmission mode, and a second CSI report of a second serving cell with which the UE is configured in a second transmission mode;

compare priorities of reporting types of the first CSI report and the second CSI reports; and

when the reporting types of the first CSI report and the second CSI report have a same priority, configure the UE to transmit the first CSI report if the CSI process index of the second CSI report has a positive value other than 1.

14. The apparatus of claim 13, wherein the processing circuitry is further configured to:

drop a CSI report having a higher serving cell index from the first CSI report and the second CSI reports if the CSI process index of the second CSI report is equal to 1.

15. The apparatus of claim 13, wherein the processing circuitry is further configured to:

configure the UE to drop the second CSI report corresponding to the CSI process index having the positive value other than 1.

16. The method of claim 13, wherein the first transmission mode is one of transmission modes 1 to 9 in which one periodic CSI reporting mode for each serving cell is configured by higher-layer signalling, and the second transmission mode is a transmission mode 10 in which one or more periodic CSI reporting modes for each serving cell are configured by higher-layer signalling.

17. A method for receiving channel state information (CSI) report in a wireless network where a plurality of cells is configured to cooperate for a user equipment (UE) with carrier aggregation (CA), the method comprising:

transmitting downlink control information comprising a CSI request field to schedule a physical uplink shared channel (PUSCH) for a serving cell; and

transmitting, via a higher layer, a configuration information element comprising trigger fields indicating whether or not a CSI process is reported in an aperiodic CSI report when the CSI request field is set to a codepoint corresponding to each trigger field,

wherein a trigger field of the trigger fields indicates whether the CSI process is reported in an aperiodic CSI report when the CSI request field is set to a codepoint corresponding to the trigger field.

18. The method of claim 17, wherein the CSI request field is set to trigger a CSI report of the UE configured in a transmission mode being configurable with one or more CSI processes per serving cell.

19. The method of claim 17, wherein the trigger fields comprises a trigger01-r11 corresponding to a ‘

01’

of the CSI request field, a trigger10-r11 corresponding to a ‘

10’

of the CSI request field, and a trigger11-r11 corresponding to a ‘

11’

of the CSI request field.

20. The method of claim 19, wherein the ‘

01’

of the CSI request field indicates that aperiodic CSI report is triggered for a set of at least one CSI process configured by the higher layer, the ‘

10’

of the CSI request field indicates that aperiodic CSI report is triggered for a first set of at least one CSI process configured by the higher layer, and the ‘

11’

of the CSI request field indicates that aperiodic CSI report is triggered for a second set of at least one CSI process configured by the higher layer.

21. The method of claim 17, wherein a trigger field of the trigger fields comprises one of:

a value indicating that no aperiodic CSI report is triggered, or a value indicating an aperiodic CSI report is triggered.

22. An apparatus capable of receiving channel state information (CSI) report in a wireless network where a plurality of cells is configured to cooperate for a user equipment (UE) with carrier aggregation (CA), the apparatus comprising a processing circuitry configured to:

transmit downlink control information comprising a CSI request field to schedule a physical uplink shared channel (PUSCH) for a serving cell; and

transmit, via a higher layer, a configuration information element comprising trigger fields indicating whether or not a CSI process is reported in an aperiodic CSI report when the CSI request field is set to a codepoint corresponding to each trigger field,

wherein a trigger field of the trigger fields indicates whether the CSI process is reported in an aperiodic CSI report when the CSI request field is set to a codepoint corresponding to the trigger field.

23. The apparatus of claim 22, wherein the CSI request field is set to trigger a CSI report of the UE configured in a transmission mode being configurable with one or more CSI processes per serving cell.

24. The apparatus of claim 22, wherein the trigger fields comprises a trigger01-r11 corresponding to a ‘

01’

of the CSI request field, a trigger10-r11 corresponding to a ‘

10’

of the CSI request field, and a trigger11-r11 corresponding to a ‘

11’

of the CSI request field.

25. The apparatus of claim 24, wherein the ‘

01’

of the CSI request field indicates that aperiodic CSI report is triggered for a set of at least one CSI process configured by the higher layer, the ‘

10’

of the CSI request field indicates that aperiodic CSI report is triggered for a first set of at least one CSI process configured by the higher layer, and the ‘

11’

of the CSI request field indicates that aperiodic CSI report is triggered for a second set of at least one CSI process configured by the higher layer.

26. The apparatus of claim 22, wherein a trigger field of the trigger fields comprises one of:

a value indicating that no aperiodic CSI report is triggered, or a value indicating an aperiodic CSI report is triggered.

27. A method for transmitting channel state information (CSI) report in a wireless network where a plurality of cells is configured to cooperate for a user equipment (UE) with carrier aggregation (CA), the method comprising:

receiving downlink control information comprising a CSI request field to schedule a physical uplink shared channel (PUSCH) for a serving cell; and

receiving a configuration information element of a higher layer comprising trigger fields indicating whether or not a CSI process is reported in an aperiodic CSI report when the CSI request field is set to a codepoint corresponding to each trigger field,

wherein a trigger field of the trigger fields indicates whether the CSI process is reported in an aperiodic CSI report when the CSI request field is set to a codepoint corresponding to the trigger field.

28. The method of claim 27, wherein the CSI request field is set to trigger a CSI report of the UE configured in a transmission mode being configurable with one or more CSI processes per serving cell.

29. The method of claim 27, wherein the trigger fields comprises a trigger01-r11 corresponding to a ‘

01’

of the CSI request field, a trigger10-r11 corresponding to a ‘

10’

of the CSI request field of, and a trigger11-r11 corresponding to a ‘

11’

of the CSI request field.

30. The method of claim 29, wherein the ‘

01’

of the CSI request field indicates that aperiodic CSI report is triggered for a set of at least one CSI process configured by the higher layer, the ‘

10’

of the CSI request field indicates that aperiodic CSI report is triggered for a first set of at least one CSI process configured by the higher layer, and the ‘

11’

of the CSI request field indicates that aperiodic CSI report is triggered for a second set of at least one CSI process configured by the higher layer.

31. The method of claim 27, wherein a trigger field of the trigger fields has either a value indicating that no aperiodic CSI report is triggered, or a value indicating an aperiodic CSI report is triggered.

32. An apparatus capable of transmitting channel state information (CSI) report in a wireless network where a plurality of cells is configured to cooperate for a user equipment (UE) with carrier aggregation (CA), the apparatus comprising a processing circuitry configured to:

receive downlink control information comprising a CSI request field to schedule a physical uplink shared channel (PUSCH) for a serving cell; and

receive a configuration information element of a higher layer comprising trigger fields indicating whether or not a CSI process is reported in an aperiodic CSI report when the CSI request field is set to a codepoint corresponding to each trigger field,

wherein a trigger field of the trigger fields indicates whether the CSI process is reported in an aperiodic CSI report when the CSI request field is set to a codepoint corresponding to the trigger field.

33. The apparatus of claim 32, wherein the CSI request field is set to trigger a CSI report of the UE configured in a transmission mode being configurable with one or more CSI processes per serving cell.

34. The apparatus of claim 32, wherein the trigger fields comprises a trigger01-r11 corresponding to a ‘

01’

of the CSI request field, a trigger10-r11 corresponding to a ‘

10’

of the CSI request field of, and a trigger11-r11 corresponding to a ‘

11’

of the CSI request field.

35. The apparatus of claim 34, wherein the ‘

01’

of the CSI request field indicates that aperiodic CSI report is triggered for a set of at least one CSI process configured by the higher layer, the ‘

10’

of the CSI request field indicates that aperiodic CSI report is triggered for a first set of at least one CSI process configured by the higher layer, and the ‘

11’

of the CSI request field indicates that aperiodic CSI report is triggered for a second set of at least one CSI process configured by the higher layer.

36. The apparatus of claim 32, wherein a trigger field of the trigger fields has either a value indicating that no aperiodic CSI report is triggered, or a value indicating an aperiodic CSI report is triggered.