CHANNEL STATE INFORMATION MEASUREMENT METHOD AND USER EQUIPMENT

• US 20180279149A1
• Filed: 11/06/2015
• Published: 09/27/2018
• Est. Priority Date: 11/07/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LI, Yingyang, WANG, Yi
• Granted Patent: US 10,560,859 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• 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 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• 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 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

The present disclosure relates to a pre-5^th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4^th-Generation (4G) communication system such as Long Term Evolution (LTE). Embodiments of the present disclosure provide a channel state information measurement method, including: receiving, by a user equipment (UE), resource indication information for a CSI measurement; performing, by the UE, the CSI measurement according to the resource indication information, and transmitting a Channel Quality Indicator (CQI) report to a control node. According to the present disclosure, users may be scheduled by the base station more effectively and the efficiency of the whole network may be increased.

Claims

1. A method for measuring Channel State Information (CSI) measurement by a user equipment (UE), the method comprising:

receiving, by a user equipment (UE), resource indication information for a CSI measurement;

performing, by the UE, the CSI measurement according to the resource indication information, and transmitting a Channel Quality Indicator (CQI) report to a control node.

2. The method of claim 1, wherein the resource indication information is CSI measurement configuration information, wherein the CSI measurement configuration information comprises at least one of channel measurement and/or interference measurement resource configuration information, for indicating aperiodic channel measurement and/or interference measurement resource, interference measurement resource type information, used for indicating that the interference measurement resource corresponds to a type that the control node occupies the carrier on the unlicensed band, or corresponds to a type that the control node does not occupy the carrier on the unlicensed band, wherein the CQI report is generated according to one or more measurement results on interference measurement resource of the same type;

and measurement results on interference measurement resource of different types cannot be combined;

the UE performing the CSI measurement comprises;

performing, by the UE, the CSI measurement on the channel measurement and/or interference measurement resource indicated by the channel measurement and/or interference measurement resource configuration information in a predefined subframe, wherein the channel measurement and/or interference measurement resource configuration information comprises channel measurement and/or interference measurement resource pattern information, wherein the channel measurement and/or interference measurement resource pattern information comprises;

indication information of one of N preconfigured patterns, or, indication information of one of N preconfigured patterns configured by higher layer, or, information of one preconfigured pattern, wherein the channel measurement and/or interference measurement pattern information is comprised in physical layer signaling for indicating cell on/off, or included in physical signaling used for indicating whether the carrier on the unlicensed band is occupied by the control node, or included in physical layer signaling for indicating whether the carrier on the unlicensed band is occupied by another wireless communication system other than the system where the UE belongs to, or included in physical signaling dedicated for indicating the channel measurement and/or interference measurement resource;

or included in physical layer signaling for scheduling the UE.

3. The method of claim 1, further comprising:

detecting, by the UE, a carrier occupation situation on the unlicensed band;

the UE performing the CSI measurement comprises;

performing, by the UE, the CSI measurement according to the detected carrier occupation situation on the unlicensed band, and transmitting the CQI report to the control node;

wherein when the control node occupies the unlicensed band, the UE performs the CSI measurement on the predefined channel measurement and interference measurement resource.

4. The method of claim 3, wherein if the UE is frame-based equipment, the predefined channel measurement and interference measurement resource is a first subframe in which the control node occupies the unlicensed band;

and/or

if the UE is load-based equipment, the predefined channel measurement and interference measurement resource is on predefined positions of a subframe in which a preamble is transmitted.

5. The method of claim 4, wherein if the length of the first subframe or the subframe in which the preamble is transmitted is not enough for mapping the predefined channel measurement and/or interference measurement resource, the UE performs the CSI measurement on predefined channel measurement and interference measurement resource in a next subframe.

6. The method of claim 3, wherein if there is data transmission in a subframe where the predefined channel measurement and interference measurement resource is present,

performing, by the UE, rate matching or punching, to avoid mapping to the predefined channel measurement and interference measurement resource;

and/or

receiving, by the UE, data according to the predefined channel measurement and interference measurement resource indicated by the control node following a predefined rate matching or punching manner,

wherein the predefined rate matching or punching manner is indicated by at least one bit transmitted by the control node.

7. The method of claim 6, wherein the bit is in Downlink Control Information DCI in a UE-specific search space, and enablement of the bit is indicated via higher layer signaling, wherein the high layer signaling is UE-specific or cell-specific or group specific.

8. The method of claim 1, wherein before the UE transmitting the CQI report to the control node, the method further comprises:

receiving, by the UE, CSI reference signal configuration information and/or CSI interference measurement resource configuration information transmitted by the control node, determining, by the UE toward earlier subframes from subframe n-n_{CQI_ref} or a most recent subframe before subframe n-nCQI-ref where the resource indicated by the configuration information is located in turn, whether a subframe where the indicated resource is located is a valid downlink subframe, if the subframe is a valid downlink subframe, performing the CQI measurement on the valid downlink subframe, and generating the CQI report according to the valid downlink subframe;

otherwise, keeping on the determining operation until a valid downlink subframe is found;

wherein the subframe n is used for feeding back the CQI report.

9. The method of claim 1, wherein before the UE transmitting the CQI report to the control node, the method further comprises:

receiving, by the UE, CSI reference signal configuration information and/or CSI interference measurement resource configuration information transmitted by the control node, determining, by the UE toward earlier subframes from subframe n-n_{CQI_ref} in turn, whether each subframe where the indicated resource is located is a valid downlink subframe, if the subframe is a valid downlink subframe, taking the valid downlink subframe as a first valid downlink subframe, generating the CQI report according to the first valid downlink subframe, and ending the determination;

otherwise, keeping on the determination until a valid downlink subframe is found;

wherein the generating the CQI report according to the first valid downlink subframe comprises;

if the first valid downlink subframe is not the subframe where the resource indicated by the CSI reference signal configuration information and/or CSI interference measurement resource configuration information transmitted by the control node is located, determining, toward earlier subframes from the first valid downlink subframe in turn, whether each subframe where the resource indicated by the CSI reference signal configuration information and/or CSI interference measurement resource configuration information is located is a valid downlink subframe, until the valid downlink subframe is found, and taking the valid downlink subframe as a second valid downlink subframe, performing the CSI measurement according to the second valid downlink subframe, taking the first valid downlink subframe as a CSI reference resource subframe, and generating the CQI report according to the first valid downlink subframe;

otherwise, performing the CSI measurement on the resource of the first valid downlink subframe in which the unlicensed band is occupied, and generating the CQI report;

wherein the subframe n is used for feeding back the CQI report.

14. The method of claim 9, wherein different valid downlink subframe determining methods are adopted for determining the first valid downlink subframe and the second valid downlink subframe.

10-13. -13. (canceled)

15. (canceled)

16. A user equipment (UE) for measuring channel state information (CSI) measurement, the UE comprising:

a transceiver configured to receive resource indication information for a CSI measurement; and

a controller configured to perform the CSI measurement according to the resource indication information, and transmit a Channel Quality Indicator (CQI) report to a control node.

17. The UE of claim 16, wherein the resource indication information is CSI measurement configuration information, wherein the CSI measurement configuration information comprises at least one of channel measurement and/or interference measurement resource configuration information, for indicating aperiodic channel measurement and/or interference measurement resource, interference measurement resource type information, used for indicating that the interference measurement resource corresponds to a type that the control node occupies the carrier on the unlicensed band, or corresponds to a type that the control node does not occupy the carrier on the unlicensed band, wherein the CQI report is generated according to one or more measurement results on interference measurement resource of the same type;

and measurement results on interference measurement resource of different types cannot be combined;

the controller is further configured to;

perform the CSI measurement on the channel measurement and/or interference measurement resource indicated by the channel measurement and/or interference measurement resource configuration information in a predefined subframe, wherein the channel measurement and/or interference measurement resource configuration information comprises channel measurement and/or interference measurement resource pattern information, wherein the channel measurement and/or interference measurement resource pattern information comprises;

indication information of one of N preconfigured patterns, or, indication information of one of N preconfigured patterns configured by higher layer, or, information of one preconfigured pattern, wherein the channel measurement and/or interference measurement pattern information is comprised in physical layer signaling for indicating cell on/off, or included in physical signaling used for indicating whether the carrier on the unlicensed band is occupied by the control node, or included in physical layer signaling for indicating whether the carrier on the unlicensed band is occupied by another wireless communication system other than the system where the UE belongs to, or included in physical signaling dedicated for indicating the channel measurement and/or interference measurement resource;

or included in physical layer signaling for scheduling the UE.

18. The UE of claim 16, wherein the controller is further configured to:

detect a carrier occupation situation on the unlicensed band, perform the CSI measurement according to the detected carrier occupation situation on the unlicensed band, and transmitting the CQI report to the control node;

wherein when the control node occupies the unlicensed band, wherein the CSI measurement is performed on the predefined channel measurement and interference measurement resource.

19. The UE of claim 18, wherein if the UE is frame-based equipment, the predefined channel measurement and interference measurement resource is a first subframe in which the control node occupies the unlicensed band;

and/or

if the UE is load-based equipment, the predefined channel measurement and interference measurement resource is on predefined positions of a subframe in which a preamble is transmitted.

20. The UE of claim 19, wherein if the length of the first subframe or the subframe in which the preamble is transmitted is not enough for mapping the predefined channel measurement and/or interference measurement resource, the controller is configured to perform the CSI measurement on predefined channel measurement and interference measurement resource in a next subframe.

21. The UE of claim 18, wherein if there is data transmission in a subframe where the predefined channel measurement and interference measurement resource is present,

the controller is configured to perform rate matching or punching, to avoid mapping to the predefined channel measurement and interference measurement resource;

and/or

the transceiver is configured to receive data according to the predefined channel measurement and interference measurement resource indicated by the control node following a predefined rate matching or punching manner,

wherein the predefined rate matching or punching manner is indicated by at least one bit transmitted by the control node.

22. The UE of claim 21, wherein the bit is in Downlink Control Information DCI in a UE-specific search space, and enablement of the bit is indicated via higher layer signaling, wherein the high layer signaling is UE-specific or cell-specific or group specific.

23. The UE of claim 16, wherein, before transmitting the CQI report to the control node, the controller is further configured to:

acquire CSI reference signal configuration information and/or CSI interference measurement resource configuration information transmitted by the control node, and determine toward earlier subframes from subframe n-n_CQI-ref or a most recent subframe before subframe n-n_CQI-ref where the resource indicated by the configuration information is located in turn, whether a subframe where the indicated resource is located is a valid downlink subframe, if the subframe is a valid downlink subframe, perform the CQI measurement on the valid downlink subframe, and generate the CQI report according to the valid downlink subframe,

otherwise, the controller is further configured to keep on the determining operation until a valid downlink subframe is found,

wherein the subframe n is used for feeding back the CQI report.

24. The UE of claim 16, wherein before transmitting the CQI report to the control node, the controller is further configured to:

receive CSI reference signal configuration information and/or CSI interference measurement resource configuration information transmitted by the control node, and determine toward earlier subframes from subframe n-n_CQI-ref in turn, whether each subframe where the indicated resource is located is a valid downlink subframe, if the subframe is a valid downlink subframe, take the valid downlink subframe as a first valid downlink subframe, generate the CQI report according to the first valid downlink subframe, and end the determination,

otherwise, the controller is further configured to keep on the determination until a valid downlink subframe is found,

wherein if the first valid downlink subframe is not the subframe where the resource indicated by the CSI reference signal configuration information and/or CSI interference measurement resource configuration information transmitted by the control node is located, the controller is further configured to determine toward earlier subframes from the first valid downlink subframe in turn, whether each subframe where the resource indicated by the CSI reference signal configuration information and/or CSI interference measurement resource configuration information is located is a valid downlink subframe, until the valid downlink subframe is found, and take the valid downlink subframe as a second valid downlink subframe, perform the CSI measurement according to the second valid downlink subframe, take the first valid downlink subframe as a CSI reference resource subframe, and generate the CQI report according to the first valid downlink subframe,

otherwise, the controller is further configured to perform the CSI measurement on the resource of the first valid downlink subframe in which the unlicensed band is occupied, and generate the CQI report, wherein the subframe n is used for feeding back the CQI report.

25. The UE of claim 24, wherein different valid downlink subframe determining processes are adopted for determining the first valid downlink subframe and the second valid downlink subframe.