METHOD FOR INSTRUCTING CSI FEEDBACK SIGNALING CONFIGURATION AND BASE STATION

• US 20150098347A1
• Filed: 04/26/2013
• Published: 04/09/2015
• Est. Priority Date: 05/10/2012
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Guo, Senbao, Li, Yu Ngok, Zhang, Junfeng
• Granted Patent: US 9,749,991 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• 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 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for instructing CSI feedback signaling configuration and base station are provided, the method comprising: a base station side notifies a terminal side, via the first higher layer signaling of a UE-Specific, a CSI-RS resource for measuring CSI, the CSI-RS resource comprising at least one of: the time frequency position of the CSI-RS resource in a subframe, the aerial port number configuration of the CSI-RS resource, a period and a subframe offset of the CSI-RS resource, the sequence identifier of the CSI-RS resource, and the power control information of the CSI-RS resource; the base station side instructs the terminal side to feed back the CSI corresponding to the CSI-RS resource. In the present invention, the base station side flexibly configures the terminal side to feed back various kinds of CSI information, thus enabling the base station side to flexibly and dynamically acquire the CSI, and in turn realizing precise link self-adaption and data transmission, and reducing the uplink feedback overhead and measurement complexity of the terminal side.

Claims

1. A method for instructing CSI feedback signaling configuration, comprising:

a base station side notifying a terminal side, via the first higher layer signaling of a UE-Specific, a CSI-RS resource for measuring CSI, wherein the CSI-RS resource comprises at least one of;

a time frequency position of the CSI-RS resource in a subframe, aerial port number configuration of the CSI-RS resource, a period and a subframe offset of the CSI-RS resource, a sequence identifier of the CSI-RS resource, and power control information of the CSI-RS resource; and

the base station side instructing the terminal side to feed back the CSI corresponding to the CSI-RS resource;

wherein the step of the base station side instructing the terminal side to feed back the CSI corresponding to the CSI-RS resource comprises;

the base station side dynamically instructing the terminal to select and feedback corresponding CSI via feedback triggering signaling bits in DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling, and/or via a resource position where DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling which belongs to the terminal and is blindly detected by the terminal side is located;

wherein the feedback triggering signaling bits in DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling are 2 bits, where 00 represents no CSI of any CSI-RS resource is triggered, and 01-11 respectively represent triggering CSI of different aggregation modes and/or interference assumptions of the CSI-RS resource;

wherein the resource position where DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling is located comprises at least one of;

a starting position of a corresponding CCE, a corresponding aggregation level, a corresponding subframe number and a corresponding system frame number and a region instruction of a corresponding higher layer signaling configuration.

2. The method according to claim 1, wherein the number of the CSI-RS resources is multiple, and before the step of the base station side instructing the terminal side to feed back the CSI corresponding to the CSI-RS resource, the method further comprising:

the base station side notifying the terminal side, via the second higher layer signaling of the UE-Specific, a candidate configuration set of CSI needing to be fed back in the multiple CSI-RS resources.

3. The method according to claim 2, wherein the step of the base station side notifying the terminal side, via the second higher layer signaling of the UE-Specific, a candidate configuration set of CSI needing to be fed back in the multiple CSI-RS resources comprises:

the base station side using a bitmap to notify the terminal side the candidate configuration set, wherein the length of the bitmap is 3 or 4 or 7 or 8, and each bit in the bitmap corresponds to a different aggregation and/or interference assumption measurement feedback mode of CSI-RS resources configured.

4. The method according to claim 1, wherein when the number of the CSI-RS resources is 1, the feedback triggering signaling bit of DCI Format 0 or DCI format 4 or the random access response or uplink scheduling grant signaling is 1 bit, where 0 represents no CSI of the CSI-RS resource is triggered, and 1 represents the CSI of the CSI-RS resource is triggered.

5. The method according to claim 1, wherein when the number of the CSI-RS resources is 2 or 3, the feedback triggering signaling bits of DCI Format 0 or DCI format 4 or the random access response or uplink scheduling grant signaling are 2 bits, where 00 represents no CSI of any CSI-RS resources is triggered, and 01-11 respectively represent CSI of different aggregation modes and/or interference assumptions of the CSI-RS resource are triggered.

6. The method according to claim 1, wherein when the number of the CSI-RS resources is 2 or 3, the feedback triggering signaling bit of DCI Format 0 or DCI format 4 or the random access response or uplink scheduling grant signaling is 1 bit, and the terminal side is instructed, via the resource position where DCI Format 0 or DCI format 4 or the random access response or uplink scheduling grant signaling is located and the feedback triggering signaling 1 bit, to feed back CSI of different aggregation modes and/or interference assumptions of the CSI-RS resources.

7. The method according to claim 1, wherein when the number of the CSI-RS resources is 2 or 3, the terminal side is instructed, via the resource position where DCI Format 0 or DCI format 4 or the random access response or uplink scheduling grant signaling is located, to feed back CSI of different aggregation modes and/or interference assumptions of the CSI-RS resources.

8. The method according to claim 1, wherein when the number of the CSI-RS resources is 2 or 3, the base station side notifies the terminal side, via the second higher layer signaling of the UE-Specific, N pieces of candidate CSI of different aggregation modes and/or interference assumptions of the CSI-RS resources, where N>

0; and

the terminal side is instructed, via the resource position where DCI Format 0 or DCI format 4 or the random access response or uplink scheduling grant signaling is located, to feed back CSI of different aggregation modes and/or interference assumptions of the CSI-RS resources.

9. The method according to claim 1, wherein when the number of the CSI-RS resources is 2 or 3, the base station side notifies the terminal side, via the second higher layer signaling of the UE-Specific, N pieces of candidate CSI of different aggregation modes and/or interference assumptions of the CSI-RS resources, where N>

0; and

the terminal side is instructed, via the feedback triggering signaling in DCI Format 0 or DCI format 4 or the random access response or uplink scheduling grant signaling, to feed back CSI of different aggregation modes and/or interference assumptions of the CSI-RS resources.

10. The method according to claim 1, wherein when the number of the CSI-RS resources is 2 or 3, the base station side notifies the terminal side, via the second higher layer signaling of the UE-Specific, N pieces of candidate CSI of different aggregation modes and/or interference assumptions of the CSI-RS resources, where N>

0; and

the terminal side is instructed, via the feedback triggering signaling in DCI Format 0 or DCI format 4 or the random access response or uplink scheduling grant signaling, and via the resource position where DCI Format 0 or DCI format 4 or the random access response or uplink scheduling grant signaling is located, to feed back CSI of different aggregation modes and/or interference assumptions of the CSI-RS resources.

11. A base station, comprising:

a first notification module, configured to notify a terminal side, via the first higher layer signaling of a UE-Specific, a CSI-RS resource for measuring CSI, the CSI-RS resource comprising at least one of;

a time frequency position of the CSI-RS resource in a subframe, aerial port number configuration of the CSI-RS resource, a period and a subframe offset of the CSI-RS resource, a sequence identifier of the CSI-RS resource, and power control information of the CSI-RS resource;

an instruction module, configured to instruct the terminal side to feed back the CSI corresponding to the CSI-RS resource; and

a dynamic instruction sub-module, configured to dynamically instruct the terminal to select and feedback corresponding CSI, via feedback triggering signaling bits in DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling, and/or via a resource position where DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling which belongs to the terminal and is blindly detected by the terminal side is located;

wherein the feedback triggering signaling bits in DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling are 2 bits, where 00 represents no CSI of any CSI-RS resources is triggered, and 01-11 respectively represent CSI of different aggregation modes and/or interference assumptions of the CSI-RS resource are triggered;

the resource position where DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling is located comprises at least one of;

a starting position of a corresponding CCE, a corresponding aggregation level, a corresponding subframe number and a corresponding system frame number and a region instruction of a corresponding higher layer signaling configuration.

12. The base station according to claim 11, wherein the base station further comprises:

a second notification module, configured to notify, when the CSI-RS resources are multiple, the terminal side, via the second higher layer signaling of the UE-Specific, a candidate configuration set of CSI needing to be fed back in the multiple CSI-RS resources.

13. The base station according to claim 12, wherein the second notification module comprises:

a candidate notification sub-module, configured to notify the terminal side the candidate configuration set via a bitmap, wherein the length of the bitmap is 3 or 4 or 7 or 8, and each bit in the bitmap corresponds to a different aggregation and/or interference assumption measurement feedback mode of CSI-RS resources configured.

14. A terminal, comprising:

a first receiving module, configured to receive a CSI-RS resource for measuring CSI from a base station via the first higher layer signaling of a UE-Specific, the CSI-RS resource comprising at least one of;

a time frequency position of the CSI-RS resource in a subframe, aerial port number configuration of the CSI-RS resource, a period and a subframe offset of the CSI-RS resource, a sequence identifier of the CSI-RS resource, and power control information of the CSI-RS resource;

a selection module, configured to select and feedback CSI corresponding to the CSI-RS resource according to the received first higher layer signaling; and

a dynamic receiving sub-module, configured to receive feedback triggering signaling bits in DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling, and/or receive a resource position where DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling which belongs to the terminal and is blindly detected by the terminal side is located, wherein the feedback triggering signaling bits and the resource position are used for dynamically instructing the terminal to select and feedback corresponding CSI;

wherein the feedback triggering signaling bits in DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling are 2 bits, where 00 represents no CSI of any CSI-RS resources is triggered, and 01-11 respectively represent CSI of different aggregation modes and/or interference assumptions of the CSI-RS resource are triggered;

the resource position where DCI Format 0 or DCI format 4 or a random access response or uplink scheduling grant signaling is located comprises at least one of;

a starting position of a corresponding CCE, a corresponding aggregation level, a corresponding subframe number and a corresponding system frame number and a region instruction of a corresponding higher layer signaling configuration.

15. The terminal according to claim 14, wherein the terminal further comprises:

a second receiving module, configured to receive, when the CSI-RS resources are multiple, a candidate configuration set of CSI needing to be fed back in the multiple CSI-RS resources from the base station via the second higher layer signaling of the UE-Specific.

16. The base station according to claim 15, wherein the second receiving module comprises:

a candidate receiving sub-module, configured to obtain the candidate configuration set of the terminal side by receiving a bitmap, wherein the length of the bitmap is 3 or 4 or 7 or 8, and each bit in the bitmap corresponds to a different aggregation and/or interference assumption measurement feedback mode of CSI-RS resources configured.