CHANNEL STATE INFORMATION FEEDBACK INSTRUCTION, FEEDBACK METHOD AND DEVICE

• US 20150071187A1
• Filed: 08/01/2012
• Published: 03/12/2015
• Est. Priority Date: 08/05/2011
• Status: Abandoned Application

• Current Assignee: China Academy of Telecom Technology (China Information Communication Technology Group Co. Ltd.)
• Original Assignee: China Academy of Telecom Technology (China Information Communication Technology Group Co. Ltd.)
• Inventors: Gao, Qiubin, Zhang, Ranran, Chen, Wen hong
• Application Number:
  US14/235,453
• Publication Number:
  US 20150071187A1
• Time in Patent Office: Days
• US Class Current: 370/329
• 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 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/0076 Distributed coding, e.g. network coding, involving channel coding coding in both space and time H04L1/0618; cooperative diversity H04B7/022
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The invention discloses a method of and apparatus for indicating a feedback of and feeding back Channel State Information (CSI) and relates to the field of wireless communication technologies so as to implement a solution in which a user equipment feeds back CSI aperiodically for a set of measurement information of transmission point and/or a measurement set indicated by abuse station. In the invention, abuse station determines from a result of joint scheduling of multiple transmission points a set of measurement information of transmission point and/or a measurement set corresponding to a set of downlink carriers for which CSI is to be fed back aperiodically by a user equipment; and the base station sends to the user equipment indication information for the determined set of measurement information of transmission point and/or the determined measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically. The user equipment feeds back CSI aperiodically according to the indication information. With the invention, the user equipment can feed back CSI aperiodically for the set of measurement information of transmission point and/or the measurement set indicated by the base station.

Claims

1. (canceled)

2. A method of indicating a feedback of Channel State Information (CSI), wherein the method comprises:

determining, by a base station, from a result of joint scheduling of multiple transmission points a set of measurement information of transmission point and/or a measurement set corresponding to a set of downlink carriers for which CSI is to be fed back aperiodically by a user equipment; and

sending, by the base station, to the user equipment indication information for the determined set of measurement information of transmission point and/or the determined measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically,

wherein sending, by the base station, to the user equipment the indication information for the determined set of measurement information of transmission point and/or the determined measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically comprises;

sending, by the base station, to the user equipment the indication information for a set of measurement information of transmission point in a preconfigured measurement set for which CSI is to be fed back aperiodically, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set;

or

sending, by the base station, to the user equipment the indication information for the determined measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically;

or

sending, by the base station, to the user equipment the indication information for a set of measurement information of transmission point in the determined measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the determined measurement set corresponding to the set of downlink carriers.

3. The method according to claim 2, wherein the indication information occupies 1 bit or 2 bits or 3 bits.

4. The method according to claim 3, wherein sending, by the base station, to the user equipment the indication information for the set of measurement information of transmission point in a preconfigured measurement set for which CSI is to be fed back aperiodically comprises:

sending, by the base station, 1-bit indication information to the user equipment to indicate a set of measurement information of transmission point including all the measurement information of transmission point in the preconfigured measurement set for which CSI is to be fed back aperiodically by the user equipment;

or

sending, by the base station, the 1-bit indication information to the user equipment to indicate a set of measurement information of transmission point including a first measurement information of transmission point in the preconfigured measurement set for which CSI is to be fed back aperiodically by the user equipment;

or

sending, by the base station, 2-bit or 3-bit indication information to the user equipment to indicate the first measurement information of transmission point in the measurement set or the set of measurement information of transmission point in the measurement set for which CSI is to be fed back aperiodically by the user equipment, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set.

5. The method according to claim 3, wherein sending, by the base station, to the user equipment the indication information for the determined measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically comprises:

sending, by the base station, 2-bit or 3-bit indication information to the user equipment to indicate the measurement set corresponding to the current carrier of the indication information or the determined measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically by the user equipment.

6. The method according to claim 3, wherein sending, by the base station, to the user equipment the indication information for the set of measurement information of transmission point in the determined measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically comprises:

sending, by the base station, 2-bit or 3-bit indication information to the user equipment to indicate the set of measurement information of transmission point in the determined measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically by the user equipment, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the determined measurement set corresponding to the set of downlink carriers.

7. The method according to claim 2, wherein before the base station sends the indication information to the user equipment, the method further comprises:

notifying, by the base station, in higher-layer signaling the user equipment of information about sets of measurement information of transmission point in respective measurement sets, measurement sets corresponding to respective sets of downlink carriers and sets of measurement information of transmission point in the measurement sets corresponding to the respective sets of downlink carriers.

8. The method according to claim 2, wherein the base station sends the indication information to the user equipment in Downlink Control Information (DCI) signaling over a Physical Downlink Control Channel (PDCCH).

9. The method according to claim 2, wherein the measurement information of transmission point includes configuration information of a downlink reference signal corresponding to the transmission point or an index of the configuration information or cell identifier (ID) information corresponding to the transmission point.

10. (canceled)

11. A method of feeding back Channel State Information (CSI), the method comprising:

receiving, by a user equipment, indication information sent from a base station for a set of measurement information of transmission point and/or a measurement set corresponding to a set of downlink carriers for which CSI is to be fed back aperiodically; and

feeding, by the user equipment, CSI corresponding to the set of measurement information of transmission point and/or the measurement set corresponding to the set of downlink carriers back to the base station according to the indication information,

wherein receiving, by the user equipment, the indication information sent from the base station for the set of measurement information of transmission point and/or the measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically comprises;

receiving, by the user equipment, the indication information sent from the base station for a set of measurement information of transmission point in a preconfigured measurement set for which CSI is to be fed back aperiodically, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set;

or

receiving, by the user equipment, the indication information sent from the base station for the measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically;

or

receiving, by the user equipment, the indication information sent from the base station for a set of measurement information of transmission point in the measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set corresponding to the set of downlink carriers.

12. The method according to claim 11, wherein the indication information occupies 1 bit or 2 bits or 3 bits.

13. The method according to claim 12, wherein feeding, by the user equipment, the CSI corresponding to the set of measurement information of transmission point and/or the measurement set corresponding to the set of downlink carriers back to the base station according to the indication information comprises:

if the user equipment receives 1-bit indication information, feeding, by the user equipment, CSI corresponding to a set of measurement information of transmission point including all the measurement information of transmission point in the preconfigured measurement set back to the base station;

or

if the user equipment receives 1-bit indication information, feeding, by the user equipment, CSI corresponding to a set of measurement information of transmission point including a first measurement information of transmission point in the preconfigured measurement set back to the base station;

or

if the user equipment receives 2-bit or 3 bit indication information, feeding, by the user equipment, CSI corresponding to the first measurement information of transmission point in the measurement set or the set of measurement information of transmission point in the measurement set back to the base station, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set;

or

if the user equipment receives 2-bit or 3 bit indication information, feeding, by the user equipment, CSI corresponding to the measurement set corresponding to the current carrier of the indication information or the measurement set corresponding to the set of downlink carriers back to the base station; and

if the user equipment receives 2-bit or 3-bit indication information, feeding, by the user equipment, CSI corresponding to the set of measurement information of transmission point in the measurement set corresponding to the set of downlink carriers back to the base station, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set.

14. The method according to claim 11, wherein before the user equipment receives the indication information, the method further comprises:

receiving, by the user equipment, information sent from the base station in higher-layer signaling about sets of measurement information of transmission point in respective measurement sets, measurement sets corresponding to respective sets of downlink carriers and sets of measurement information of transmission point in the measurement sets corresponding to the respective sets of downlink carriers.

15. The method according to claim 11, wherein the user equipment receives the indication information in Downlink Control Information (DCI) signaling over a Physical Downlink Control Channel (PDCCH).

16. The method according to claim 11, wherein the measurement information of transmission point includes configuration information of a downlink reference signal corresponding to the transmission point or an index of the configuration information or cell identifier (ID) information corresponding to the transmission point.

17-26. -26. (canceled)

27. A user equipment, wherein the user equipment comprises:

a receiving unit configured to receive indication information sent from a base station for a set of measurement information of transmission point and/or a measurement set corresponding to a set of downlink carriers for which CSI is to be fed back aperiodically; and

a feedback unit configured to feed CSI corresponding to the set of measurement information of transmission point and/or the measurement set corresponding to the set of downlink carriers back to the base station according to the indication information,

wherein the receiving unit is configured;

to receive the indication information sent from the base station for a set of measurement information of transmission point in a preconfigured measurement set for which CSI is to be fed back aperiodically, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set;

or

to receive the indication information sent from the base station for the measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically;

or

to receive the indication information sent from the base station for a set of measurement information of transmission point in the measurement set corresponding to the set of downlink carriers for which CSI is to be fed back aperiodically, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set corresponding to the set of downlink carriers.

28. The user equipment according to claim 27, wherein the indication information occupies 1 bit or 2 bits or 3 bits.

29. The user equipment according to claim 28, wherein the feedback unit is configured:

if 1-bit indication information is received, to feed CSI corresponding to a set of measurement information of transmission point including all the measurement information of transmission point in the preconfigured measurement set back to the base station;

or

if 1-bit indication information is received, to feed CSI corresponding to a set of measurement information of transmission point including a first measurement information of transmission point in the preconfigured measurement set back to the base station;

or

if 2-bit or 3 bit indication information is received, to feed CSI corresponding to the first measurement information of transmission point in the measurement set or the set of measurement information of transmission point in the measurement set back to the base station, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set;

or

if 2-bit or 3 bit indication information is received, to feed CSI corresponding to the measurement set corresponding to the current carrier of the indication information or the measurement set corresponding to the set of downlink carriers back to the base station;

or

if 2-bit or 3-bit indication information is received, to feed CSI corresponding to the set of measurement information of transmission point in the measurement set corresponding to the set of downlink carriers back to the base station, wherein the set of measurement information of transmission point includes a part or all of the measurement information of transmission point in the measurement set.

30. The user equipment according to claim 27, wherein the receiving unit is further configured:

to receive information sent from the base station in higher-layer signaling about sets of measurement information of transmission point in respective measurement sets, measurement sets corresponding to respective sets of downlink carriers and sets of measurement information of transmission point in the measurement sets corresponding to the respective sets of downlink carriers.

31. The user equipment according to claim 27, wherein the receiving unit is further configured:

to receive the indication information in Downlink Control Information (DCI) signaling over a Physical Downlink Control Channel (PDCCH).

32. The user equipment according to claim 27, wherein the measurement information of transmission point includes configuration information of a downlink reference signal corresponding to the transmission point or an index of the configuration information or cell identifier (ID) information corresponding to the transmission point.