# US 12,003,975 B2 · Channel state information (CSI) measurement and report for dynamic spectrum sharing (DSS) in a wireless wide area network (WWAN)

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- Number: US 12,003,975 B2
- Document ID: US12003975B2
- Status: Granted
- Kind: B2
- Application number: 17/463,386
- Filed: 2021-08-31
- Published: 2023-03-02
- Granted: 2024-06-04
- Earliest claimed: 2021-08-31
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Ming Yang; Kausik Ray Chaudhuri; Juan Montojo
- Web page: https://patentgrep.com/patent/US12003975B2

## CPC

- H04W 16/14: Spectrum sharing arrangements {between different networks}
- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W 72/54: based on quality criteria
- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a channel state information (CSI) measurement and reporting protocol for dynamic spectrum sharing (DSS) in a wireless communication network. In some aspects, a BS may transmit control messages periodically and aperiodically that configure a UE to perform signal quality measurements and transmit signal quality reports. When the UE receives a periodic control message, the UE may perform signal quality measurements on both a multimedia broadcast single frequency network (MBSFN) subframe and a non-MBSFN subframe of a frame received from the BS. When the UE receives an aperiodic control message, the UE may perform a signal quality measurement on either a MBSFN subframe or a non-MBSFN subframe. The UE may generate and transmit signal quality reports to the BS periodically and aperiodically corresponding to the received periodic and aperiodic control messages, respectively.

## Claims

### Claim 1

A method for dynamic spectrum sharing (DSS) in a wireless wide area network (WWAN) performed by a first node, comprising:
performing a first signal quality measurement associated with a first subframe of a frame received from a second node, wherein the first subframe is associated with a first subframe type;
performing a second signal quality measurement associated with a second subframe of the frame, wherein the second subframe is associated with a second subframe type;
identifying that a first percentage of the frame includes subframes of the first subframe type, wherein the first signal quality measurement is associated with the subframes of the first subframe type;
identifying that a second percentage of the frame includes subframes of the second subframe type, wherein the second signal quality measurement is associated with the subframes of the second subframe type;
weighing the first signal quality measurement according to the first percentage and the second signal quality measurement according to the second percentage;
calculating a third signal quality measurement using the weighted first signal quality measurement and the weighted second signal quality measurement; and
transmitting, to the second node, a first signal quality report associated with at least one of the first signal quality measurement and the second signal quality measurement and including the third signal quality measurement that is calculated using the weighted first signal quality measurement and the weighted second signal quality measurement.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first signal quality report is a channel state information (CSI) report, and performing the first signal quality measurement associated with the first subframe includes:
performing the first signal quality measurement on CSI reference signals (CSI-RSs) included in the first subframe, or
performing the first signal quality measurement on data included in the first subframe.

### Claim 3 (depends on 2)

The method of claim 2, wherein:
the data includes data of a Physical Downlink Shared Channel (PDSCH).

### Claim 4 (depends on 1)

The method of claim 1, wherein performing the second signal quality measurement associated with the second subframe includes:
performing the second signal quality measurement on channel state information (CSI) reference signals (CSI-RSs) included in the second subframe, or
performing the second signal quality measurement on data included in the second subframe.

### Claim 5 (depends on 4)

The method of claim 4, wherein:
the data includes data of a Physical Downlink Shared Channel (PDSCH).

### Claim 6 (depends on 4)

The method of claim 4, wherein the first signal quality report is a CSI report.

### Claim 7 (depends on 1)

The method of claim 1, wherein transmitting the first signal quality report including the third signal quality measurement comprises:
transmitting the first signal quality report including the third signal quality measurement periodically according to a time interval.

### Claim 8 (depends on 1)

The method of claim 1, further comprising:
generating one or more additional signal quality reports;
indicating either the first signal quality measurement or the second signal quality measurement; and
transmitting the one or more additional signal quality reports to the second node.

### Claim 9 (depends on 8)

The method of claim 8, wherein transmitting the one or more additional signal quality reports comprises:
transmitting the one or more additional signal quality reports periodically according to a time interval.

### Claim 10 (depends on 1)

The method of claim 1, further comprising:
receiving a radio resource control (RRC) message from the second node; and
performing the first signal quality measurement and the second signal quality measurement based on receiving the RRC message from the second node.

### Claim 11 (depends on 1)

The method of claim 1, wherein the first subframe type is a multimedia broadcast single frequency network (MBSFN) subframe type and the second subframe type is a non-MBSFN subframe type.

### Claim 12

A method for dynamic spectrum sharing (DSS) in a wireless wide area network (WWAN) performed by a first node, comprising:
transmitting, to a second node, a control message that indicates one of a first subframe of a frame or a second subframe of the frame in which one or more channel state information (CSI) reference signals (CSI-RSs) are to be provided to the second node, wherein the first subframe is associated with a first subframe type and the second subframe is associated with a second subframe type;
receiving a first signal quality report from the second node, the first signal quality report indicating a third signal quality measurement that is a combination of a first signal quality measurement weighted by a percentage of the frame that includes subframes of the first subframe type and a second signal quality measurement weighted by a percentage of the frame that includes subframes of the second subframe type; and
scheduling a data transmission in at least one of the first subframe and the second subframe, the scheduling being associated with the third signal quality measurement.

### Claim 13 (depends on 12)

The method of claim 12, wherein scheduling the data transmission in at least one of the first subframe and the second subframe includes at least one of:
scheduling a first data transmission in the first subframe, the scheduling being associated with the first signal quality measurement; and
scheduling a second data transmission in the second subframe, the scheduling being associated with the second signal quality measurement.

### Claim 14 (depends on 13)

The method of claim 13, wherein the first signal quality report further indicates at least one of the first signal quality measurement and the second signal quality measurement.

### Claim 15 (depends on 12)

The method of claim 12, wherein receiving the first signal quality report indicating the third signal quality measurement comprises:
receiving the first signal quality report indicating the third signal quality measurement periodically according to a time interval.

### Claim 16 (depends on 12)

The method of claim 12, wherein the first subframe type is a multimedia broadcast single frequency network (MBSFN) subframe type and the second subframe type is a non-MBSFN subframe type.

### Claim 17

An apparatus of a first node configured to implement dynamic spectrum sharing (DSS) in a wireless wide area network (WWAN), the apparatus comprising:
one or more processors;
one or more memories coupled with the one or more processors; and
one or more processor-readable instructions stored in the one or more memories and executable by the one or more processors individually or collectively to cause the apparatus to:
perform a first signal quality measurement associated with a first subframe of a frame received from a second node, and perform a second signal quality measurement associated with a second subframe of the frame, wherein the first subframe is associated with a first subframe type and the second subframe is associated with a second subframe type;
identify that a first percentage of the frame includes subframes of the first subframe type, wherein the first signal quality measurement is associated with the subframes of the first subframe type;
identify that a second percentage of the frame includes subframes of the second subframe type, wherein the second signal quality measurement is associated with the subframes of the second subframe type;
weigh the first signal quality measurement according to the first percentage and the second signal quality measurement according to the second percentage;
calculate a third signal quality measurement using the weighted first signal quality measurement and the weighted second signal quality measurement; and
transmit, to the second node, a first signal quality report associated with at least one of the first signal quality measurement and the second signal quality measurement, and including the third signal quality measurement that is calculated using the weighted first signal quality measurement and the weighted second signal quality measurement.

### Claim 18 (depends on 17)

The apparatus of claim 17, wherein the first signal quality report is a channel state information (CSI) report, and wherein, to perform the first signal quality measurement associated with the first subframe, the one or more processor-readable instructions are executable by the one or more processors individually or collectively to cause the apparatus to:
perform the first signal quality measurement on CSI reference signals (CSI-RSs) included in the first subframe, or
perform the first signal quality measurement on data included in the first subframe.

### Claim 19 (depends on 18)

The apparatus of claim 18, wherein the data includes data of a Physical Downlink Shared Channel (PDSCH).

### Claim 20 (depends on 17)

The apparatus of claim 17, wherein, to perform the second signal quality measurement associated with the second subframe, the one or more processor-readable instructions are executable by the one or more processors individually or collectively to cause the apparatus to:
perform the second signal quality measurement on channel state information (CSI) reference signals (CSI-RSs) included in the second subframe, or
perform the second signal quality measurement on data included in the second subframe.

### Claim 21 (depends on 20)

The apparatus of claim 20, wherein the first signal quality report is a CSI report.

### Claim 22 (depends on 20)

The apparatus of claim 20, wherein the data includes data of a Physical Downlink Shared Channel (PDSCH).

### Claim 23 (depends on 17)

The apparatus of claim 17, wherein, to transmit the first signal quality report including the third signal quality measurement, the one or more processor-readable instructions are executable by the one or more processors individually or collectively to cause the apparatus to:
transmit the first signal quality report including the third signal quality measurement periodically according to a time interval.

### Claim 24 (depends on 17)

The apparatus of claim 17, wherein the one or more processor-readable instructions are further executable by the one or more processors individually or collectively to cause the apparatus to:
generate one or more additional signal quality reports; indicating either the first signal quality measurement or the second signal quality measurement; and
transmit the one or more additional signal quality reports to the second node.

### Claim 25 (depends on 24)

The apparatus of claim 24, wherein, to transmit the one or more additional signal quality reports, the one or more processor-readable instructions are executable by the one or more processors individually or collectively to cause the apparatus to:
transmit the one or more additional signal quality reports periodically according to a time interval.

### Claim 26 (depends on 17)

The apparatus of claim 17, wherein the one or more processor-readable instructions are further executable by the one or more processors individually or collectively to cause the apparatus to:
receive a radio resource control (RRC) message from the second node; and
perform the first signal quality measurement and the second signal quality measurement based on reception of the RRC message from the second node.

### Claim 27 (depends on 17)

The apparatus of claim 17, wherein the first subframe type is a multimedia broadcast single frequency network (MBSFN) subframe type and the second subframe type is a non-MBSFN subframe type.

### Claim 28

An apparatus of a first node configured to implement dynamic spectrum sharing (DSS) in a wireless wide area network (WWAN), the apparatus comprising:
one or more processors;
one or more memories coupled with the one or more processors; and
one or more processor-readable instructions stored in the one or more memories and executable by the one or more processors individually or collectively to cause the apparatus to:
transmit, to a second node, a control message that indicates one of a first subframe of a frame or a second subframe of the frame in which one or more channel state information (CSI) reference signals (CSI-RSs) are to be provided to the second node, wherein the first subframe is associated with a first subframe type and the second subframe is associated with a second subframe type;
receive, from the second node, a first signal quality report indicating a third signal quality measurement that is a combination of a first signal quality measurement weighted by a percentage of the frame that includes subframes of the first subframe type and a second signal quality measurement weighted by a percentage of the frame that includes subframes of the second subframe type; and
schedule a data transmission in at least one of the first subframe and the second subframe, the scheduled data transmission being associated with the third signal quality measurement.

### Claim 29 (depends on 28)

The apparatus of claim 28, wherein, to schedule the data transmission in at least one of the first subframe and the second subframe, the one or more memories are executable by the one or more processors individually or collectively to cause the apparatus to:
schedule a first data transmission in the first subframe, the scheduled first transmission being associated with the first signal quality measurement; and
schedule a second data transmission in the second subframe, the scheduled second transmission being associated with the second signal quality measurement,
wherein the first signal quality report further indicates at least one of the first signal quality measurement and the second signal quality measurement.

### Claim 30 (depends on 28)

The apparatus of claim 28, wherein, to receive the first signal quality report indicating the third signal quality measurement, the one or more processor-readable instructions are executable by the one or more processors individually or collectively to cause the apparatus to:
receive the first signal quality report indicating the third signal quality measurement periodically according to a time interval.