METHOD, SYSTEM, AND DEVICE FOR CONFIGURING CHANNEL MEASUREMENT AND DL CSI FEEDBACK

• US 20150146557A1
• Filed: 12/31/2012
• Published: 05/28/2015
• Est. Priority Date: 05/18/2012
• Status: Active Grant

• Current Assignee: Datang Mobile Communications Equipment Company Limited (China Information Communication Technology Group Co. Ltd.)
• Original Assignee: China Academy of Telecom Technology (China Information Communication Technology Group Co. Ltd.)
• Inventors: Pan, Xueming, Xu, Jing, Shen, Zukang
• Granted Patent: US 9,445,296 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

Embodiments of the present invention relate to the technical field of wireless communications, and in particular, to a method, system, and device for configuring channel measurement and DL CSI feedback, so as to implement measurement in a dynamic TDD system. The method for configuring channel measurement according to the embodiment of the present invention comprises: a network side device dividing downlink subframes into multiple downlink subframe groups according to an interference condition on the downlink subframes; and the network side device notifying a user equipment of channel measurement configuration information corresponding to the downlink subframe groups. The network side device notifies the user equipment of the channel measurement configuration information corresponding to the multiple downlink subframe groups that are obtained according to the interference condition on the downlink subframe, thereby implementing measurement in the dynamic TDD system.

Claims

1. A method for configuring channel measurement, comprising:

a network side device dividing downlink sub-frames into a plurality of groups of downlink sub-frames; and

the network side device notifying a user equipment of channel measurement configuration information corresponding to the groups of downlink sub-frames.

2. The method according to claim 1, wherein before the network side device notifies the user equipment of the channel measurement configuration information corresponding to the groups of downlink sub-frames, the method further comprises:

the network side device notifying the user equipment of the downlink sub-frames included in the groups of downlink sub-frames.

3. The method according to claim 2, wherein before the network side device notifies the user equipment of the channel measurement configuration information corresponding to the groups of downlink sub-frames, the method further comprises:

the network side device determining a feedback periodicity of periodical Channel State Information, CSI, a feedback sub-frame and a feedback channel resource corresponding to each of the groups of downlink sub-frames; and

the network side device taking the determined feedback periodicity of periodical CSI, feedback sub-frame and feedback channel resource corresponding to the group of downlink sub-frames as the channel measurement configuration information corresponding to the group of downlink sub-frames.

6. The method according to claim 1, wherein before the network side device notifies the user equipment of the channel measurement configuration information corresponding to the groups of downlink sub-frames, the method further comprises:

the network side device taking downlink sub-frames included in each of the groups of downlink sub-frames and a CSI measurement periodicity corresponding to the group of downlink sub-frame as channel measurement configuration information corresponding to the group of downlink sub-frame;

or

the network side device taking a correspondence relationship between each CSI measurement sub-frame and a group of downlink sub-frames, and a CSI measurement periodicity corresponding to the group of downlink sub-frames as channel measurement configuration information corresponding to the group of downlink sub-frames, wherein one CSI measurement sub-frame corresponds to one group of downlink sub-frames.

7. The method according to claim 6, wherein after the network side device notifies the user equipment of the channel measurement configuration information corresponding to the groups of downlink sub-frames, the method further comprises:

the network side device triggering the user equipment to feedback downlink, DL, CSI of at least one of the groups of downlink sub-frames,

wherein the network side device triggering the user equipment to feedback the DL CSI of at least one of the groups of downlink sub-frames comprises;

the network side device triggering the user equipment to feedback the DL CSI of at least one of the groups of downlink sub-frames through Channel Quality Indicator, CQI, request Information in an uplink, UL, or grant.

10. The method according to claim 7, wherein a plurality of bits are occupied by the CQI request information;

and

the network side device triggering the user equipment to feedback the DL CSI of at least one of the groups of downlink sub-frames through the CQI request information in the UL grant comprises;

the network side device determining a bit value corresponding to a group of downlink sub-frames, for which a feedback is required, according to a correspondence relationship between the group of downlink sub-frames and the bit value, determining the CQI request information according to the determined bit value and notifying the user equipment of the determined CQI request information;

or

the network side device determining a bit value corresponding to a set of downlink sub-frames, for which a feedback is required, according to a correspondence relationship between the set of downlink sub-frames and the bit value, determining the CQI request information according to the determined bit value and notifying the user equipment of the determined CQI request information, wherein one set of downlink sub-frames includes at least one group of downlink sub-frames.

4-5. -5. (canceled)

8-9. -9. (canceled)

11. A method for downlink Channel State Information, DL CSI, feedback, comprising:

a user equipment receiving channel measurement configuration information, corresponding to groups of downlink sub-frames, from a network side device, wherein downlink sub-frames are divided by the network side device into the groups of downlink sub-frames; and

the user equipment measuring DL CSI according to the channel measurement configuration information and feeding back a measurement result to the network side device.

12. The method according to claim 11, wherein before the user equipment receives the channel measurement configuration information, corresponding to the groups of downlink sub-frames, from the network side device, the method further comprises:

the user equipment receiving a notification of the downlink sub-frames included in the groups of downlink sub-frames from the network side device.

13. The method according to claim 12, wherein the channel measurement configuration information comprises a feedback periodicity of periodical CSI, a feedback sub-frame and a feedback channel resource corresponding to each of the groups of downlink sub-frames.

14. The method according to claim 13, wherein the user equipment measuring the DL CSI according to the channel measurement configuration information and feeding back the measurement result to the network side device comprises:

the user equipment feeding back the DL CSI, measured in the corresponding group of downlink sub-frames, in the feedback sub-frame over the feedback channel resource at the feedback periodicity of periodical CSI.

15. The method according to claim 14, wherein the user equipment feeding back the measurement result comprises:

the user equipment feeding back, in a sub-frame n, the DL CSI of the group of downlink sub-frames corresponding to the feedback sub-frame measured in a sub-frame n−

k_i;

wherein k_i≧

m, m is a processing time period of the user equipment by taking a sub-frame as unit, the sub-frame n−

k_i is a downlink sub-frame in the group of downlink sub-frames closest to the sub-frame n, i is a positive integer smaller than or equal to N, and N is the number of the groups of downlink sub-frames.

19. The method according to claim 11, wherein the channel measurement configuration information comprises downlink sub-frames included in each of the groups of downlink sub-frames and a CSI measurement periodicity corresponding to the group of downlink sub-frames;

and

the user equipment measuring the DL CSI according to the channel measurement configuration information comprises;

the user equipment selecting a downlink sub-frame from a group of downlink sub-frames as a DL CSI measurement sub-frame and measuring the DL CSI at a corresponding CSI measurement periodicity.

20. The method according to claim 11, wherein the channel measurement configuration information comprises a correspondence relationship between a CSI measurement sub-frame and a group of downlink sub-frames, and a corresponding CSI measurement periodicity, wherein one CSI measurement sub-frame corresponds to one group of downlink sub-frames;

and

the user equipment measuring the DL CSI according to the channel measurement configuration information comprises;

the user equipment measuring the DL CSI in a DL CSI measurement sub-frame corresponding to the group of downlink sub-frames at the corresponding CSI measurement periodicity.

21. The method according to claim 19, wherein the user equipment feeding back the measurement result to the network side device comprises:

the user equipment feeding back the measurement result after triggered by the network side device.

22. The method according to claim 21, wherein the user equipment feeding back the measurement result comprises:

the user equipment feeding back the measurement result upon determining that the feedback is required according to Channel Quality Indicator, CQI, request information in a received uplink, UL, grant of the network side device.

26. The method according to claim 22, wherein a plurality of bits are occupied by the CQI request information;

and

the user equipment feeding back the measurement result comprises;

the user equipment determining a group of downlink sub-frames corresponding to a bit value of the CQI request information according to a correspondence relationship between the group of downlink sub-frames and the bit value and feeding back the DL CSI measured in a DL CSI measurement sub-frame in the determined group of downlink sub-frames;

or

the user equipment determining a set of downlink sub-frames corresponding to a bit value of the CQI request information according to a correspondence relationship between the set of downlink sub-frames and the bit value and feeding back the DL CSI measured in a DL CSI measurement sub-frame in a group of downlink sub-frames in the determined set of downlink sub-frames, wherein one set of downlink sub-frames includes at least one group of downlink sub-frames.

27. The method according to claim 26, wherein the user equipment feeding back the measurement result comprises:

if the UL grant carrying the CQI request information schedules PUSCH transmission of a sub-frame n, and the CQI request information indicates that CSI needs to be fed back, then the user equipment feeding back, the DL CSI measured in a sub-frame n−

k_i, in the sub-frame n over the PUSCH;

wherein k_i≧

m, m is a processing time period of the user equipment by taking a sub-frame as unit, the sub-frame n−

k_i is a DL CSI measurement sub-frame in the i-th group of downlink sub-frames closest to the sub-frame n, i is a positive integer smaller than or equal to N, i is an index of a group of downlink sub-frames for which a feedback triggered by the CQI request information is required, and N is the number of the groups of downlink sub-frames.

56. The method according to claim 14, wherein the user equipment feeding back the measurement result comprises:

if an uplink feedback sub-frame corresponds to a plurality of groups of downlink sub-frames, then the user equipment feeding back, in the uplink feedback sub-frame, DL CSI measured in one of the plurality of groups of downlink sub-frames, and not feeding back DL CSI measured in other groups of downlink sub-frames.

16-18. -18. (canceled)

23-25. -25. (canceled)

28. A network side device for configuring channel measurement, comprising:

a dividing module configured to divide downlink sub-frames into a plurality of groups of downlink sub-frames; and

a first processing module configured to notify a user equipment of channel measurement configuration information corresponding to the groups of downlink sub-frames.

29-37. -37. (canceled)

38. A user equipment for downlink Channel State Information, DL CSI, feedback, comprising:

a receiving module configured to receive channel measurement configuration information, corresponding to groups of downlink sub-frames, from a network side device, wherein downlink sub-frames are divided by the network side device into the groups of downlink sub-frames; and

a second processing module configured to measure DL CSI according to the channel measurement configuration information and feeding back a measurement result to the network side device.

39-55. -55. (canceled)