CSI-RS for AMM Measurements

• US 20200136787A1
• Filed: 03/26/2018
• Published: 04/30/2020
• Est. Priority Date: 03/24/2017
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: REIAL, Andres, DA SILVA, Icaro L.J., FAN, Rui, TIDESTAV, Claes
• Granted Patent: US 11,611,420 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• 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: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data

Abstract

According to some embodiments, a method for use in a network node of transmitting a measurement signal for evaluating a quality of a link from a cell comprises: determining (412) a first virtual identifier for a first link; determining (414) a group of one or more channel state information reference signal (CSI-RS) sequences that are available to be transmitted from the cell; associating (420) one or more of a frequency resource allocation, a time resource allocation, a CSI- RS sequence from the group of one or more CSI-RS sequences, and a layer allocation with the first virtual identifier; and transmitting (422) a first CSI-RS for measurement using one or more of the frequency resource allocation, time resource allocation, CSI-RS sequence, and layer allocation associated with the first virtual identifier.

Claims

1. A method for use in a network node of transmitting a measurement signal for evaluating a quality of a link from a cell, the method comprising:

determining a first virtual identifier for a first link;

determining a group of one m more channel state infortnation reference signal (CSI-RS) sequences that are available to be transmitted from the cell;

associating one or more of a frequency resource allocation, a time resource allocation, a CSI-RS sequence from the group of one or more CSI-RS sequences, and a layer allocation with the first virtual identifier; and

transmitting a first CSI-RS for measurement using one or more of the frequency resource allocation, time resource allocation, CSI-RS sequence, and layer allocation associated with the first virtual identifier.

2. The method of claim 1, wherein determining the virtual identifier is based on a cell identifier of the cell.

3. The method of claim 1, wherein determining the virtual identifier is based on at least one of a beam identifier in a multi-beam cell, a transmission reception point (TRP) in a multi-TRP cell, or a sector in a muld-sector cell.

4. The method of claim 1, wherein a portion of the virtual identifier is encoded in the transmitted CSI-RS sequence.

5. The method of claim 1, further comprising transmitting CSI-RS configuration information to a wireless device, the CSI-RS configuration information comprising, for each CSI-RS of a plurality of CSI-RS, one or more of a frequency resource allocation, a time resource allocation, a CSI-RS sequence, and a layer allocation.

8. The method of claim 1, further comprising;

determining a second virtual identifier for a second link;

associating one or more of a frequency resource allocation, a time resource allocation, a CSI-RS sequence from the group of one or more CSI-RS sequences, and a layer allocation with the second virtual identifier;

transmitting a second CST-RS for measurement using one or more of the frequency resource allocation, time resource allocation, CSI-RS sequence, and layer allocation associated with the second virtual identifier;

receiving a measurement report, the measurement report comprising a virtual identifier; and

determining whether the measurement report is associated with the first link or the second link based on the virtual identifier in the measurement report.

7. (cancelled)

9. A network node operable to transmit a measurement signal for evaluating a quality of a link from a cell, the network node comprising processing circuitry operable to:

determine a first virtual identifier for a first link;

determine a group of one or more channel state infbrmation reference signal (CSI-RS) sequences that are available to be transmitted from the cell;

associate one or more of a frequency resource allocation, a time resource allocation, a CLI-RS sequence from the group of one or more CSI-RS sequences, and a layer allocation with the first virtual identifier; and

transmit a first CST-RS for measurement using one or more of the frequency resource allocation, time resource allocation, CSI-RS sequence, and layer allocation associated with the first virtual identifier.

10. The network node of claim 9, wherein the processing circuitry is operable to determine the virtual identifier based on a cell identifier of the cell.

11-16. -16. (canceled)

17. A method for use in a wireless device of measurement of a link quality, the method comprising:

obtaining channel state information reference signal (CSI-RS) configuration information, the CSI-RS configuration information comprising, for a plurality of CSI-RS, one or more of a frequency resource allocation, a time resource allocation, a CSI-RS sequence generator seed, a bandwidth allocation, and a layer allocation;

measuring a CSI-RS associated with a link according to the obtained CSI-RS configuration information; and

reporting a quality of the measured CSI-RS to a network node.

18. The method of claim 17, wherein measuring the CSI-RS associated with the link comprises blindly searching the allocations in the CSI-RS configuration for the CST-RS.

19. The method of claim 17, further comprising determining a virtual identifier of the measured CSI-RS based on one or more of a frequency resource allocation, a time resource allocation, a CSI-RS sequence, a bandwidth allocation, and a layer allocation of the measured CSI-RS;

and

wherein reporting the quality of the measured CSI-RS includes reporting the determined virtual identifier associated with the measured CSI-RS.

21. The method of claim 17, further comprising detecting a system synchronization (SS) signal.

22. The method of claim 21, wherein at least part of the CSI-RS configuration information is specified relative to a time and frequency position of the detected SS signal.

20. (canceled)

23-27. -27. (canceled)

28. A wireless device capable of measurement of a link quality, the wireless device comprising processing circuitry operable to:

obtain channel state information reference signal (CSI-RS) configuration information, the CSI-RS configuration information comprising, for a plurality of CSI-RS, one or more of a frequency resource allocation, a time resource allocation, a CSI-RS sequence generator seed, a bandwidth allocation, and, a layer allocation;

measure a CSI-RS associated with a link according to the obtained channel state information; and

report a quality of the measured CSI-RS to a network node.

29. The wireless device of claim 28, wherein the processing circuitry is operable to measure the CSI-RS associated with the link by blindly searching the allocations in the CSI-RS configuration for the CST-RS.

30-40. -40. (canceled)