Method and device for configuring channel state information feedback, method and device for measurement and feedback

• US 20150131563A1
• Filed: 07/11/2013
• Published: 05/14/2015
• Est. Priority Date: 07/31/2012
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Guo, Senbao, Sun, Yunfeng, Li, Yu Ngok, Zhang, Junfeng
• Granted Patent: US 9,793,970 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

Disclosed is a method for configuring a channel state information (CSI) feedback. The method comprises: configuring multiple sets of CIS processes for a terminal, where each CSI process comprises at least information on a channel measurement part and information on an interference measurement, where the information on the channel measurement part comprises one or multiple sets of nonzero power CSI reference signal configuration or indication information, and where the information on the interference measurement part comprises at least one type of information among the following: one or multiple sets of interference measurement resource configuration information or indication information, one or multiple sets of nonzero power CSI reference signal configuration information for use in interference measurement compensation. Also disclosed are a method for measurement and feedback based on the method, and a corresponding device for implementing the method. The present invention implements unified configuration and reception of the CSI feedback for a base station-side and a terminal-side, and is capable of flexibly implementing CSI configuration and feedback.

Claims

1-31. -31. (canceled)

32. A method for configuring Channel State Information (CSI) feedback, comprising:

configuring, for a terminal, multiple CSI processes each comprising at least channel measuring information and interference measuring information, wherein

the channel measuring information comprises one or more sets of nonzero-power (NZP) CSI Reference Signal (CSI-RS) configuring or indicating information; and

the interference measuring information comprises at least one of;

one or more sets of interference measurement resource (IMR) configuring information or IMR indicating information; and

one or more sets of interference measurement compensating NZP CSI-RS configuring information, wherein

the multiple CSI processes comprises at least one item of;

a configured number N of reported processes supported; and

process report configuring information, wherein

the process report configuring information comprises at least one item of;

a set of NZP CSI-RS configuring information for reporting a process n; and

at least one of a set of IMR configuring information for reporting the process n and a set of interference measurement compensating NZP CSI-RS configuring information or interference measurement compensating NZP CSI-RS indicating information for reporting the process n;

wherein both the n and the N are natural numbers, with n≦

N, n being a process index,

and/or the multiple CSI processes comprises

process report configuring information, wherein

the process report configuring information comprises at least one item of;

a set of NZP CSI-RS configuring information for reporting a process n; and

at least one of a set of IMR configuring information for reporting the process n and a set of interference measurement compensating NZP CSI-RS configuring information or interference measurement compensating NZP CSI-RS indicating information for reporting the process n;

wherein both the n and the N are natural numbers, with n≦

N, n being a process index.

33. The method according to claim 32, further comprising:

configuring, for the terminal, information for configuring or indicating one or more NZP CSI-RSs for channel measurement, IMRs and/or interference measurement compensating NZP CSI-RSs.

34. The method according to claim 33, further comprising:

indicating, with index information or bitmap information, channel measuring information and interference measuring information of each of one or more CSI processes configured, wherein the channel measuring information of the each of one or more CSI processes configured consists of information for configuring a NZP CSI-RS; and

the interference measuring information of the each of one or more CSI processes configured consists of a set of IMR configuring information and a set of interference measurement compensating NZP CSI-RS configuring information, or consists of a set of IMR configuring information.

35. The method according to claim 34, wherein the one or more NZP CSI-RSs for channel measurement consist of one or more NZP CSI-RSs;

the one or more IMRs consist of one or more zero-power (ZP) CSI-RSs; and

the information for configuring the one or more interference measurement compensating NZP CSI-RSs consists of information for configuring one or more NZP CSI-RSs in the channel measuring information,

and/or the indicating, with the index information, the channel measuring information and the interference measuring information of the each of one or more CSI processes configured comprises;

indicating channel measuring information and interference measuring information of a CSI process with M bits, wherein M1 bits are for the channel measuring information indicating one of the configured one or more NZP CSI-RSs for channel measurement, and M2 bits are for the interference measuring information indicating one of the configured one or more IMRs for interference measurement, the M1, the M2, and the M all being natural numbers, with M1+M2=M.

36. The method according to claim 34, wherein the indicating, with the index information, the channel measuring information and the interference measuring information of the each of one or more CSI processes configured comprises:

indicating channel measuring information and interference measuring information of a CSI process with M bits, wherein M1 bits are for the channel measuring information indicating one of the configured one or more NZP CSI-RSs for channel measurement, M2 bits are for the interference measuring information indicating one of the configured one or more IMRs for interference measurement, and M3 bits are for the interference measuring information indicating one of the configured one or more interference measurement compensating NZP CSI-RSs for interference measurement compensation, the M1, the M2, the M3, and the M all being natural numbers, with M1+M2+M3=M,

and/or the indicating, with the index information, the channel measuring information and the interference measuring information of the each of one or more CSI processes configured comprises;

indicating channel measuring information and interference measuring information of a CSI process with M bits, wherein M1 bits are for the channel measuring information

indicating one of the configured one or more NZP CSI-RSs for channel measurement, and M2 bits are for the interference measuring information indicating, with joint coding, one of the configured one or more IMRs for interference measurement and indicating one of the configured one or more interference measurement compensating NZP CSI-RSs for interference measurement compensation, the M1, the M2, and the M all being natural numbers, with M1+M2=M.

37. The method according to claim 34, wherein the indicating, with the index information, the channel measuring information and the interference measuring information of the each of one or more CSI processes configured comprises:

indicating the channel measuring information with 2 bits, indicating IMR information in the interference measuring information with 4 bits, and indicating interference measurement compensating information in the interference measuring information with 2 bits;

or, indicating the channel measuring information with 2 bits, indicating IMR information in the interference measuring information with 3 bits, and indicating interference measurement compensating information in the interference measuring information with 2 bits;

or, indicating the channel measuring information with 2 bits, indicating IMR information in the interference measuring information with 2 bits, and indicating interference measurement compensating information in the interference measuring information with 2 bits;

or, indicating the channel measuring information with 2 bits, indicating IMR information in the interference measuring information with 1 bit, and indicating interference measurement compensating information in the interference measuring information with 1 bit;

or, indicating the channel measuring information with 2 bits, and indicating, with joint coding, IMR information and interference measurement compensating information in the interference measuring information with 2 bits.

38. The method according to claim 32, further comprising:

forming P CSI processes with one or more sets of channel measuring information and one or more sets of interference measuring information, and notifying, via a P-bit bitmap, the terminal to feed back Q of the P CSI processes, wherein the Q is a number of bits with a value of 1 in the P-bit bitmap or a number of bits with a value of 0 in the P-bit bitmap, both the P and the Q being natural numbers.

39. The method according to claim 33, further comprising:

configuring, for each set of NZP channel measuring reference signal configuring information, information for configuring or indicating one or more IMRs and/or interference measurement compensating NZP RSs.

40. The method according to claim 39, wherein the one or more IMRs consist of one or more zero-power (ZP) CSI-RSs.

41. A measuring method based on Channel State Information (CSI) feedback configuring information, comprising:

acquiring, by a terminal, multiple CSI processes configured, and performing measurement in accordance with the multiple CSI processes, wherein each of the multiple CSI processes comprises at least channel measuring information and interference measuring information;

the channel measuring information comprises one or more sets of nonzero-power (NZP) CSI Reference Signal (CSI-RS) configuring or indicating information; and

the interference measuring information comprises at least one of;

one or more sets of interference measurement resource (IMR) configuring information or IMR indicating information; and

one or more sets of interference measurement compensating NZP CSI-RS configuring information, wherein

the multiple CSI processes comprises at least one item of;

a configured number N of reported processes supported; and

process report configuring information, wherein

the process report configuring information comprises at least one item of;

a set of NZP CSI-RS configuring information for reporting a process n; and

at least one of a set of IMR configuring information for reporting the process n and a set of interference measurement compensating NZP CSI-RS configuring information or interference measurement compensating NZP CSI-RS indicating information for reporting the process n;

wherein both the n and the N are natural numbers, with n≦

N, n being a process index,

and/or the multiple CSI processes comprises

process report configuring information, wherein

the process report configuring information comprises at least one item of;

a set of NZP CSI-RS configuring information for reporting a process n; and

at least one of a set of IMR configuring information for reporting the process n and a set of interference measurement compensating NZP CSI-RS configuring information or interference measurement compensating NZP CSI-RS indicating information for reporting the process n;

wherein both the n and the N are natural numbers, with n≦

N, n being a process index.

42. The method according to claim 41, further comprising:

acquiring, by the terminal, configured information for configuring or indicating one or more NZP CSI-RSs for channel measurement, multiple IMRs and/or multiple interference measurement compensating NZP CSI-RSs.

43. The method according to claim 42, further comprising:

acquiring, by the terminal, index information or bitmap information indicating channel measuring information and interference measuring information of each of one or more CSI processes, wherein the channel measuring information of the each of one or more CSI processes configured consists of information for configuring a NZP CSI-RS; and

the interference measuring information of the each of one or more CSI processes configured consists of a set of IMR configuring information and a set of interference measurement compensating NZP CSI-RS configuring information, or consists of a set of IMR configuring information.

44. The method according to claim 43, wherein the one or more NZP CSI-RSs for channel measurement consist of one or more NZP CSI-RSs;

the one or more IMRs consist of one or more zero-power (ZP) CSI-RSs; and

the information for configuring the one or more interference measurement compensating NZP CSI-RSs consists of information for configuring one or more NZP CSI-RSs in the channel measuring information,

and/or the index information indicates channel measuring information and interference measuring information of a CSI process with M bits, wherein M1 bits are for the channel measuring information indicating one of the configured one or more NZP CSI-RSs for channel measurement, and M2 bits are for the interference measuring information indicating one of the configured one or more IMRs for interference measurement, the M1, the M2, and the M all being natural numbers, with M1+M2=M,

and/or the index information indicates channel measuring information and interference measuring information of a CSI process with M bits, wherein M1 bits are for the channel measuring information indicating one of the configured one or more NZP CSI-RSs for channel measurement, M2 bits are for the interference measuring information indicating one of the configured one or more IMRs for interference measurement, and M3 bits are for the interference measuring information indicating one of the configured one or more interference measurement compensating NZP CSI-RSs for interference measurement compensation, the M1, the M2, the M3, and the M all being natural numbers, with M1+M2+M3=M.

45. The method according to claim 43, wherein the index information indicates channel measuring information and interference measuring information of a CSI process with M bits, wherein M1 bits are for the channel measuring information indicating one of the configured one or more NZP CSI-RSs for channel measurement, and M2 bits are for the interference measuring information indicating, with joint coding, one of the configured one or more IMRs for interference measurement and indicating one of the configured one or more interference measurement compensating NZP CSI-RSs for interference measurement compensation, the M1, the M2, and the M all being natural numbers, with M1+M2=M,

and/or the index information is configured for:

indicating the channel measuring information with 2 bits, indicating IMR information in the interference measuring information with 4 bits, and indicating interference measurement compensating information in the interference measuring information with 2 bits;

or, indicating the channel measuring information with 2 bits, indicating IMR information in the interference measuring information with 3 bits, and indicating interference measurement compensating information in the interference measuring information with 2 bits;

or, indicating the channel measuring information with 2 bits, and indicating IMR information in the interference measuring information with 2 bits;

or, indicating the channel measuring information with 2 bits, indicating IMR information in the interference measuring information with 2 bits, and indicating interference measurement compensating information in the interference measuring information with 2 bits;

or, indicating the channel measuring information with 2 bits, indicating IMR information in the interference measuring information with 1 bit, and indicating interference measurement compensating information in the interference measuring information with 1 bit;

or, indicating the channel measuring information with 2 bits, and indicating, with joint coding, IMR information and interference measurement compensating information in the interference measuring information with 2 bits.

46. The method according to claim 41, wherein P CSI processes are formed with one or more sets of channel measuring information and one or more sets of interference measuring information, and the terminal is notified, via a P-bit bitmap, to feed back Q of the P CSI processes, wherein the Q is a number of bits with a value of 1 in the P-bit bitmap or a number of bits with a value of 0 in the P-bit bitmap, both the P and the Q being natural numbers.

47. A method for feeding back Channel State Information (CSI), comprising:

when there is a conflict in Rank Indicators (RIs) of multiple CSI processes fed back by a terminal, computing, in accordance with an RI corresponding to a CSI process with a highest priority, a Channel Quality Indicator (CQI) and a Precoding Matrix Index (PMI) corresponding to any conflicting CSI process, and feeding back the RI corresponding to the CSI process with the highest priority.

48. The method according to claim 47, further comprising:

determining a priority of a CSI process by at least one of the following ways;

determining the priority of the CSI process according to an order in which the CSI process is configured;

determining the priority of the CSI process according to an order of configuring a channel measuring nonzero-power (NZP) CSI Reference Signal (CSI-RS) in the CSI process;

determining the priority of the CSI process in a configured way;

determining the priority of the CSI process according to a type of feeding back a CSI process;

determining the priority of the CSI process according to a mode of feeding back a CSI process;

determining the priority of the CSI process according to an order of configuring an interference measurement resource (IMR) in the CSI process; and

determining the priority of the CSI process according to an order of configuring an interference measurement compensating resource in the CSI process.

49. A device for configuring Channel State Information (CSI) feedback, comprising

a configuring unit configured for:

configuring, for a terminal, multiple CSI processes each comprising at least channel measuring information and interference measuring information, wherein

the channel measuring information comprises one or more sets of nonzero-power (NZP) CSI Reference Signal (CSI-RS) configuring or indicating information; and

the interference measuring information comprises at least one of;

one or more sets of interference measurement resource (IMR) configuring information or IMR indicating information; and

one or more sets of interference measurement compensating NZP CSI-RS configuring information.

50. A measuring device based on Channel State Information (CSI) feedback configuring information, comprising

an acquiring unit configured for acquiring multiple CSI processes configured;

and

a measuring unit configured for performing measurement in accordance with the multiple CSI processes;

wherein each of the multiple CSI processes comprises at least channel measuring information and interference measuring information;

the channel measuring information comprises one or more sets of nonzero-power (NZP) CSI Reference Signal (CSI-RS) configuring or indicating information; and

the interference measuring information comprises at least one of;

one or more sets of interference measurement resource (IMR) configuring information or IMR indicating information; and

one or more sets of interference measurement compensating NZP CSI-RS configuring information.

51. A device for feeding back Channel State Information (CSI), comprising

a determining unit configured for triggering a computing unit when there is a conflict in Rank Indicators (RIs) of multiple CSI processes fed back;

the computing unit configured for computing, in accordance with an RI corresponding to a CSI process with a highest priority, a Channel Quality Indicator (CQI) and a Precoding Matrix Index (PMI) corresponding to any conflicting CSI process; and

a feedback unit configured for feeding back the RI corresponding to the CSI process with the highest priority.