METHOD AND UE FOR MEASURING CSI-RS

• US 20160174093A1
• Filed: 10/18/2013
• Published: 06/16/2016
• Est. Priority Date: 10/19/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Qui, Haijie, Zhou, Xutao, Sun, Chengjun, Chen, Zixiong
• Granted Patent: US 10,368,260 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• 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 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

An example of the present disclosure provides a method and User Equipment (UE) apparatus for measuring a Channel State Indication (CSI)-Reference Signal (RS), by utilizing multiple CSI-RS resources, which includes: receiving, by a User Equipment (UE), a signaling, in which the signaling indicates a multiple CSI-RS resource combination, which corresponds to a CSI-RS Reference Signal Receiving Power (RSRP), and/or, a CSI-RS Reference Signal Receiving Quality (RSRQ), and corresponding configuration information; obtaining, by the UE, a resource location corresponding to the obtained multiple CSI-RS resource combination, and the corresponding configuration information from the signaling; measuring, by the UE, the CSI-RS at the corresponding resource location, and reporting a measurement result.

Claims

1. A method to measure a channel state indication (CSI)-reference signal (RS), the method comprising:

receiving, by a user Equipment (UE), a signaling, wherein the signaling indicates a multiple CSI-RS resource combination, that corresponds to a CSI-RS and configuration information;

obtaining, by the UE, a resource location to the multiple CSI-RS resource combination and the corresponding configuration information;

measuring, by the UE, the CSI-RS at the resource location; and

reporting a measurement result, wherein measuring the CSI-RS comprises measuring at least one of a CSI-RS reference signal receiving power (RSRP) and a CSI-RS reference signal receiving quality (RSRQ).

2. The method according to claim 1, wherein the UE obtains information about the multiple CSI-RS resource combination from a broadcast message or a radio resource configuration message that is transmitted by a base station (BS).

3. The method according to claim 2, wherein the information about the multiple CSI-RS resource combination comprises at least one of:

a size of the multiple CSI-RS resource combination;

an index corresponding to the multiple CSI-RS resource combination;

a CSI-RS configuration set corresponding to the multiple CSI-RS resource combination;

a CSI-RS subframe configuration set corresponding to the multiple CSI-RS resource combination; and

an RS configuration within the multiple CSI-RS resource combination.

4. The method according to claim 1, wherein a combination mode about the multiple CSI-RS resource combination comprises at least one of:

combining multiple CSI-RS resources of a same subframe by selecting different CSI-RS configurations; and

combining multiple CSI-RS resources of different subframes by selecting different CSI-RS subframe configurations.

5. The method according to claim 4, wherein combining the multiple CSI-RS resources comprises:

combining the multiple CSI-RS resources by randomly selecting from currently available CSI-RS resources, or

combining the multiple CSI-RS resources by selecting and combining CSI-RS resources with a stronger CSI correlation according to correlation characteristics about a time-frequency domain channel in currently available CSI-RS resources.

6. The method according to claim 5, wherein selecting and combining the CSI-RS resources with stronger CSI correlation comprises:

selecting the CSI-RS resources adjacent in a frequency domain from a same subframe, and combining the selected CSI-RS resources.

7. The method according to claim 5, wherein selecting is based on a resource elements (REs) mapping about an existing CSI-RS resource or REs mapping about a newly designed CSI-RS resource.

8. The method according to claim 7, wherein the REs mapping about the newly designed CSI-RS resource comprises:

adding available CSI-RS resources that are based on the REs mapping about the existing CSI-RS resource, or

modifying REs location mapping of the existing CSI-RS resource.

9. The method according to claim 1, wherein the RS comprises:

a cell specific RS, or a UE specific RS.

20. The method according to claim 5, wherein selecting and combining the CSI-RS resources with the stronger CSI correlation comprises:

selecting the CSI-RS resources with an adjacent subframe configuration from different subframes and combining the selected CSI-RS resources.

10. A user equipment (UE) to measure a channel state indication (CSI) reference signal (RS), the UE comprising:

a receiver configured to receive a signal, and obtain from the signal a multiple CSI-RS resource combination, that corresponds to at least one of a CSI-RS reference signal receiving power (RSRP) and a CSI-RS reference signal receiving quality (RSRQ) and configuration information;

a measuring device configured to obtain a resource location corresponding to the multiple CSI-RS resource combination indicated by the signaling, and measure at least one of the CSI-RS RSRP and the CSI-RS RSRQ at the obtained resource location; and

a transmitter configured to transmit a measurement result obtained by the measuring device.

11. The UE according to claim 10, wherein the receiver is further configured to receive a broadcast message or a radio resource configuration message that is transmitted by a base station (BS), and obtain information about the multiple CSI-RS resource combination from the received broadcast message or radio resource configuration message.

12. The UE according to claim 11, wherein the information about the multiple CSI-RS resource combination comprises at least one of:

a size of the multiple CSI-RS resource combination;

an index corresponding to the multiple CSI-RS resource combination;

a CSI-RS configuration set corresponding to the multiple CSI-RS resource combination;

a CSI-RS subframe configuration set corresponding to the multiple CSI-RS resource combination; and

an RS configuration within the multiple CSI-RS resource combination.

13. The UE according to claim 10, wherein a combination mode about the multiple CSI-RS resource combination comprises at least one of:

combining multiple CSI-RS resources of a same subframe by selecting different CSI-RS configurations; and

combining multiple CSI-RS resources of different subframes by selecting different CSI-RS subframe configurations.

14. The UE according to claim 13, wherein combining the multiple CSI-RS resources comprises combining the multiple CSI-RS resources by randomly selecting from currently available CSI-RS resources or by selecting and combining CSI-RS resources with a stronger CSI correlation according to correlation characteristics about a time-frequency domain channel in currently available CSI-RS resources.

15. The UE according to claim 14, wherein selecting and combining the CSI-RS resources with the stronger CSI correlation comprises selecting the CSI-RS resources in an adjacent frequency domain from a same subframe and combining the selected CSI-RS resources.

16. The UE according to claim 15, wherein selecting and combining the CSI-RS resources with the stronger CSI correlation comprises selecting the CSI-RS resources with an adjacent subframe configuration from different subframes and combining the selected CSI-RS resources.

17. The UE according to claim 15, wherein selecting is based on a resource element (REs) mapping about an existing CSI-RS resource or a REs mapping about a newly designed CSI-RS resource.

18. The UE according to claim 17, wherein the REs mapping about the newly designed CSI-RS resource comprises:

adding available CSI-RS resources that are based on the REs mapping about the existing CSI-RS resource;

or

modifying REs location mapping of the existing CSI-RS resource.

19. The UE according to claim 11, wherein the RS comprises:

a cell specific RS or a UE specific RS.