# US 11,910,385 B2 · Control channel monitoring configurations for cross-carrier scheduling

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- Number: US 11,910,385 B2
- Document ID: US11910385B2
- Status: Granted
- Kind: B2
- Application number: 17/448,701
- Filed: 2021-09-23
- Published: 2022-04-07
- Granted: 2024-02-20
- Earliest claimed: 2020-10-01
- Assignees: QUALCOMM Incorporated
- Applicants: Qualcomm Incorporated
- Inventors: Kazuki Takeda; Alberto Rico Alvarino; Peter Gaal; Wanshi Chen; Tao Luo; Jing Sun; Juan Montojo; Mostafa Khoshnevisan
- Web page: https://patentgrep.com/patent/US11910385B2

## CPC

- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 72/1273: of downlink data flows
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 48/12: using downlink control channel
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)}
- H04W 72/20: Control channels or signalling for resource management
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Mechanisms for cross-carrier scheduling from a first cell to a second cell in a wireless networking scheme are provided. In one aspect, a method for wireless communication includes: receiving, from a base station (BS), a first configuration for scheduling in a first cell, the first configuration comprising at least one of a first monitoring periodicity parameter or a first monitoring offset parameter associated with a search space in a second cell different than the first cell; receiving, from the BS, a second configuration for scheduling in the second cell, the second configuration comprising at least one of a different second monitoring periodicity parameter or a different second monitoring offset parameter associated with the search space in the second cell; and monitoring, in the search space in the second cell based on the first configuration and the second configuration, for downlink control information (DCI).

## Claims

### Claim 1

A method of wireless communication performed by a user equipment (UE), the method comprising:
receiving, from a base station (BS), a first configuration for scheduling in a first cell, the first configuration comprising a first monitoring parameter associated with a search space in a second cell different than the first cell, wherein the first monitoring parameter is based on a first subcarrier spacing (SCS) associated with the first cell;
receiving, from the BS, a second configuration for scheduling in the second cell, the second configuration comprising a second monitoring parameter associated with the search space in the second cell, wherein the second monitoring parameter is different than the first monitoring parameter, and wherein the second monitoring parameter is based on a second SCS associated with the second cell, the second SCS being different from the first SCS; and
monitoring, in the search space in the second cell based on the first monitoring parameter and the second monitoring parameter, for downlink control information (DCI) comprising a scheduling grant for a transmission in the first cell.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first cell is a primary cell, and wherein the second cell is a secondary cell.

### Claim 3 (depends on 1)

The method of claim 1, wherein the first monitoring parameter comprises a monitoring periodicity parameter, and wherein the second monitoring parameter comprises a monitoring offset parameter.

### Claim 4 (depends on 3)

The method of claim 3, wherein the monitoring periodicity parameter comprises an indication of a number of slots.

### Claim 5 (depends on 1)

The method of claim 1, wherein the first monitoring parameter comprises a monitoring offset parameter, and wherein the second monitoring parameter comprises monitoring periodicity parameter.

### Claim 6 (depends on 5)

The method of claim 5, wherein the monitoring offset parameter comprises an indication of a slot offset relative to a time reference.

### Claim 7 (depends on 1)

The method of claim 1, wherein the first configuration further comprises at least one of:
an indication of a duration of the search space; or
an indication of one or more symbols within a slot associated with the search space.

### Claim 8 (depends on 1)

The method of claim 1, further comprising:
receiving, in the first cell based on the monitoring, the DCI.

### Claim 9

A method of wireless communication performed by a base station (B S), the method comprising:
transmitting, to a user equipment (UE), a first configuration for scheduling in a first cell, the first configuration comprising a first monitoring parameter associated with a search space in a second cell different than the first cell, wherein the first monitoring parameter is based on a first subcarrier spacing (SCS) associated with the first cell;
transmitting, to the UE, a second configuration for scheduling in the second cell, the second configuration comprising a second monitoring parameter associated with the search space in the second cell, wherein the second monitoring parameter is different than the first monitoring parameter, and wherein the second monitoring parameter is based on a second SCS associated with the second cell, the second SCS being different from the first SCS; and
transmitting, to the UE via the second cell based on the first monitoring parameter and monitoring parameter, downlink control information (DCI) comprising a scheduling grant for a transmission in the first cell.

### Claim 10 (depends on 9)

The method of claim 9, wherein the first cell is a primary cell, and wherein the second cell is a secondary cell.

### Claim 11 (depends on 9)

The method of claim 9, wherein the first monitoring parameter comprises a monitoring parameter, and wherein the second monitoring parameter comprises a monitoring offset parameter.

### Claim 12 (depends on 9)

The method of claim 9, wherein the first monitoring parameter comprises a monitoring offset parameter, and wherein the second monitoring parameter comprises monitoring periodically parameter, and wherein the monitoring offset parameter comprises an indication of a slot offset relative to a time reference.

### Claim 13 (depends on 9)

The method of claim 9, wherein the first configuration further comprises at least one of:
an indication of a duration of the search space; or
an indication of one or more symbols within a slot associated with the search space.

### Claim 14

A user equipment (UE), comprising:
a transceiver configured to:
receive, from a base station (BS), a first configuration for scheduling in a first cell, the first configuration comprising a first monitoring parameter associated with a search space in a second cell different than the first cell, wherein the first monitoring parameter is based on a first subcarrier spacing (SCS) associated with the first cell; and
receive, from the BS, a second configuration for scheduling in the second cell, the second configuration comprising a second monitoring parameter associated with the search space in the second cell, wherein the second monitoring parameter is different than the first monitoring parameter, and wherein the second monitoring parameter is based on a second SCS associated with the second cell, the second SCS being different from the first SCS; and
a processor in communication with the transceiver and configured to:
monitor, in the search space in the second cell based on the first monitoring parameter and the second monitoring parameter, for downlink control information (DCI) comprising a scheduling grant for a transmission in the first cell.

### Claim 15 (depends on 14)

The UE of claim 14, wherein the first cell is a primary cell, and wherein the second cell is a secondary cell.

### Claim 16 (depends on 14)

The UE of claim 14, wherein the first monitoring parameter comprises a monitoring periodicity parameter, and wherein the second monitoring parameter comprises a monitoring offset parameter.

### Claim 17 (depends on 16)

The UE of claim 16, wherein the monitoring periodicity parameter comprises an indication of a number of slots.

### Claim 18 (depends on 14)

The UE of claim 14, wherein the first monitoring parameter comprises a monitoring offset parameter, and wherein the second monitoring parameter comprises monitoring periodicity parameter.

### Claim 19 (depends on 18)

The UE of claim 18, wherein the monitoring offset parameter comprises an indication of a slot offset relative to a time reference.

### Claim 20 (depends on 14)

The UE of claim 14, wherein the first configuration further comprises at least one of:
an indication of a duration of the search space; or
an indication of one or more symbols within a slot associated with the search space.

### Claim 21

A base station (B S), comprising:
a transceiver configured to:
transmit, to a user equipment (UE), a first configuration for scheduling in a first cell, the first configuration comprising a first monitoring parameter associated with a search space in a second cell different than the first cell, wherein the first monitoring parameter is based on a first subcarrier spacing (SCS) associated with the first cell;
transmit, to the UE, a second configuration for scheduling in the second cell, the second configuration comprising a second monitoring parameter associated with the search space in the second cell, wherein the second monitoring parameter is different than the first monitoring parameter, and wherein the second monitoring parameter is based on a second SCS associated with the second cell, the second SCS being different from the first SCS; and
transmit, to the UE via the second cell based on the first monitoring parameter and the second monitoring parameter, downlink control information (DCI) comprising a scheduling grant for a transmission in the first cell.

### Claim 22 (depends on 21)

The BS of claim 21, wherein the first cell is a primary cell, and wherein the second cell is a secondary cell.

### Claim 23 (depends on 21)

The BS of claim 21, wherein the first monitoring parameter comprises a monitoring periodicity parameter, and wherein the second monitoring parameter comprises a monitoring offset parameter.

### Claim 24 (depends on 21)

The BS of claim 21, wherein the first monitoring parameter comprises a monitoring offset parameter, and wherein the second monitoring parameter comprises monitoring periodicity parameter, and wherein the monitoring offset parameter comprises an indication of a slot offset relative to a time reference.

### Claim 25 (depends on 21)

The BS of claim 21, wherein the first configuration further comprises at least one of:
an indication of a duration of the search space; or
an indication of one or more symbols within a slot associated with the search space.