# US 12,009,917 B2 · Rate matching for layer 1 (L1) or layer 2 (L2) mobility protocol

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- Number: US 12,009,917 B2
- Document ID: US12009917B2
- Status: Granted
- Kind: B2
- Application number: 17/234,406
- Filed: 2021-04-19
- Published: 2021-10-21
- Granted: 2024-06-11
- Earliest claimed: 2020-04-21
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Yan Zhou; Qian Zhang; Tao Luo
- Web page: https://patentgrep.com/patent/US12009917B2

## CPC

- H04L 1/0013: {Rate matching, e.g. puncturing or repetition of code symbols}
- H04L 5/0023: {Time-frequency-space}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information}
- H04W 28/04: Error control
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- 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

Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a user equipment (UE). The method generally includes receiving layer 1 (L1) or layer 2 (L2) signaling indicating one or more selected physical cell identifiers (PCIs) of a group of PCIs for serving the UE; receiving an indication of a rule to be used for determining a configuration for rate matching around unavailable resources of a channel to be received via one or more cells associated with the one or more selected PCIs; determining the configuration for the rate matching based on the rule; and receiving the channel via the one or more cells in accordance with the determination.

## Claims

### Claim 1

A method for wireless communication by a user equipment (UE), comprising:
receiving lower layer signaling indicating one or more selected physical cell identifiers (PCIs) of a group of PCIs for serving the UE;
receiving an indication of a rule to be used for determining a configuration for rate matching around unavailable resources of a channel to be received via one or more cells associated with the one or more selected PCIs;
receiving, via a cell associated with a PCI of the one or more selected PCIs, an indication scheduling resources for the channel;
receiving signaling indicating resources allocated for synchronization signal block (SSB) transmissions for the group of PCIs, wherein the indication of the rule comprises an indication that at least a portion of the resources of the channel that are overlapping with at least one of the SSB transmissions via the cell scheduling the resources for the channel are the unavailable resources, and that the resources for the channel are non-overlapping with SSB transmissions for one or more other PCIs of the group of PCIs;
determining the configuration for the rate matching based on the rule, wherein determining the configuration comprises determining to rate match around the unavailable resources or the resources overlapping with the at least one of the SSB transmissions via the cell; and
receiving the channel via the one or more cells in accordance with the determination.

### Claim 2 (depends on 1)

The method of claim 1, where the lower layer signaling comprises downlink control information (DCI) signaling, medium access control (MAC)-control element (CE) signaling, or any combination thereof.

### Claim 3 (depends on 1)

The method of claim 1, wherein the indication of the rule comprises a radio network temporary identifier (RNTI) associated with the channel.

### Claim 4 (depends on 3)

The method of claim 3, wherein receiving the indication of the rule comprises receiving a control channel scrambled with the RNTI.

### Claim 5 (depends on 3)

The method of claim 3, wherein the RNTI comprises a system information (SI)-RNTI, and wherein the determination of the configuration is based on whether a control channel scheduling the resources for the channel is scrambled with the SI-RNTI.

### Claim 6 (depends on 5)

The method of claim 5, wherein the determination of the configuration is further based on a logic state of a system information indicator in downlink control information (DCI) of the control channel.

### Claim 7 (depends on 3)

The method of claim 3, wherein the RNTI comprises a random access (RA)-RNTI, message B (MsgB)-RNTI, paging (P)-RNTI, or temporary cell (TC)-RNTI, wherein the determination of the configuration is based on whether a control channel scheduling resources for the channel is scrambled with the RA-RNTI, the MsgB-RNTI, the paging (P)-RNTI, or the temporary cell (TC)-RNTI.

### Claim 8 (depends on 3)

The method of claim 3, wherein the RNTI comprises a cell (C)-RNTI, a modulation and coding scheme (MCS)-C-RNTI, or a configured scheduling (CS)-RNTI, wherein the determination of the configuration is based on whether a control channel scheduling resources for the channel is scrambled with the C-RNTI, MC S-C-RNTI, or CS-RNTI.

### Claim 9 (depends on 1)

The method of claim 1, wherein receiving the indication of the rule comprises receiving a system information indicator associated with the channel, and where the indication of the rule comprises the system information indicator.

### Claim 10 (depends on 1)

The method of claim 1, further comprising receiving signaling indicating unavailable resources associated with the group of PCIs, wherein:
the indication of the rule comprises an indication that at least a portion of resources of the channel that are overlapping with the unavailable resources are not available; and
the determination of the configuration for the rate matching comprises determining to rate match around the resources of the channel that are not available or overlapped with the unavailable resources associated with the group of PCIs.

### Claim 11 (depends on 10)

The method of claim 10, wherein the indication of the rule comprises an indication of a rate matching pattern for the channel, the rate matching pattern indicating the unavailable resources.

### Claim 12 (depends on 11)

The method of claim 11, wherein the rate matching pattern has resource block (RB) level granularity in a frequency domain and symbol level granularity in a time domain.

### Claim 13 (depends on 11)

The method of claim 11, wherein the rate matching pattern has resource element (RE) level granularity in a frequency domain and symbol level granularity in a time domain.

### Claim 14 (depends on 10)

The method of claim 10, wherein the determination of the configuration is based whether the channel is scheduled using semi-persistent scheduling (SPS).

### Claim 15 (depends on 1)

The method of claim 1, further comprising receiving signaling indicating unavailable resources associated with the group of PCIs, wherein:
the indication of the rule comprises an indication that at least a portion of the resources of the channel that are overlapping with the unavailable resources for the one or more selected PCIs of the group of PCIs are not available, and that the resources for the channel are non-overlapping with the unavailable resources for non-selected PCIs of the group of PCIs; and
the determination of the configuration for the rate matching comprises determining to rate match around the resources of the channel that are not available or overlapped with the unavailable resources for the one or more selected PCIs.

### Claim 16 (depends on 1)

The method of claim 1, further comprising:
receiving, via a cell associated with a PCI of the one or more selected PCIs, an indication scheduling the resources for the channel; and
receiving signaling indicating unavailable resources associated with the group of PCIs, wherein:
the indication of the rule comprises an indication that at least a portion of the resources of the channel that are overlapping with the unavailable resources associated with the cell scheduling the resources for the channel are not available, and that the resources for the channel are non-overlapping with the unavailable resources for one or more other PCIs of the group of PCIs; and
the determination of the configuration for the rate matching comprises determining to rate match around the resources of the channel that are not available or overlapped with the unavailable resources associated with the cell.

### Claim 17 (depends on 1)

The method of claim 1, wherein:
the channel is received via a PCI of the one or more selected PCIs;
the group of PCIs comprise one or more configured sub-groups of PCIs;
the method further comprises:
receiving signaling indicating unavailable resources associated with the sub-groups of PCIs; and
determining at least one PCI sub-group of the configured sub-groups of PCIs that includes the one or more selected PCIs, one of the at least one PCI sub-group having the PCI via which the channel is received;
the indication of the rule comprises an indication that at least a portion of resources of the channel that are overlapping with the unavailable resources associated with the one of the at least one PCI sub-group are not available; and
the determination of the configuration for the rate matching comprises determining to rate match around the resources of the channel that are not available or overlapped with the unavailable resources associated with the one of the at least one PCI sub-group.

### Claim 18 (depends on 1)

The method of claim 1, wherein:
the group of PCIs comprise one or more configured sub-groups of PCIs;
the method further comprises:
receiving signaling indicating unavailable resources associated with the sub-group of PCIs; and
determining at least one PCI sub-group of the configured sub-groups of PCIs that includes the one or more selected PCIs;
the indication of the rule comprises an indication that at least a portion of resources of the channel that are overlapping with the unavailable resources associated with the at least one PCI sub-group are not available; and
the determination of the configuration for the rate matching comprises determining to rate match around the resources of the channel that are not available or overlapped with the unavailable resources associated with the at least one PCI sub-group.

### Claim 19 (depends on 1)

The method of claim 1, wherein:
multiple candidate rate matching patterns are configured for the group of PCIs;
the method further comprising receiving signaling indicating one of the multiple candidate rate matching patterns, the one of the multiple candidate rate matching patterns indicating unavailable resources associated with the one or more selected PCIs;
the indication of the rule comprises an indication that at least a portion of the resources of the channel that are overlapping with the unavailable resources associated with the one or more selected PCIs are not available, and that the resources for the channel are non-overlapping with unavailable resources for one or more other PCIs of the group of PCIs; and
the determination of the configuration for the rate matching comprises determining to rate match around the resources of the channel that are not available or overlapped with the unavailable resources associated with the one or more selected PCIs.

### Claim 20 (depends on 1)

The method of claim 1, further comprising transmitting an indication of a capability of the UE to support one or more candidate rules for the determination of the configuration for rate matching, wherein the indication of the rule is selected from the one or more candidate rules.

### Claim 21 (depends on 1)

The method of claim 1, wherein the group of PCIs are associated with multiple transmission-reception points (TRPs) of a cell.

### Claim 22 (depends on 1)

The method of claim 1, wherein the group of PCIs are associated with multiple cells.

### Claim 23

A method for wireless communication by a base station, (BS) comprising:
transmitting, to a user equipment (UE), an indication of a rule to be used for determining a configuration for rate matching around unavailable resources of a channel, the channel to be transmitted via one or more cells associated with one or more selected PCIs of a group of PCIs configured using lower layer signaling to serve the UE;
transmitting, via a cell associated with a PCI of the one or more selected PCIs, an indication scheduling resources for the channel;
transmitting signaling indicating resources allocated for synchronization signal block (SSB)transmissions for the group of PCIs, wherein the indication of the rule comprises an indication that at least a portion of the resources of the channel that are overlapping with at least one of the SSB transmissions via the cell scheduling the resources for the channel are the unavailable resources, and that the resources for the channel are non-overlapping with SSB transmissions for one or more other PCIs of the group of PCIs;
generating the channel in accordance with the configuration for rate matching; and
transmitting the channel to the UE.

### Claim 24 (depends on 23)

The method of claim 23, where the lower layer signaling comprises downlink control information (DCI) signaling, medium access control (MAC)-control element (CE) signaling, or any combination thereof.

### Claim 25

An apparatus for wireless communication by a user equipment (UE), comprising:
memory; and
one or more processors coupled to the memory, the one or more processors being configured, individually or collectively, to:
receive lower layer signaling indicating one or more selected physical cell identifiers (PCIs) of a group of PCIs for the UE;
receive an indication of a rule to be used for determining a configuration for rate matching around unavailable resources of a channel to be received via one or more cells associated with the one or more selected PCIs;
receive, via a cell associated with a PCI of the one or more selected PCIs, an indication scheduling resources for the channel;
receive signaling indicating resources allocated for synchronization signal block (SSB)transmissions for the group of PCIs, wherein the indication of the rule comprises an indication that at least a portion of the resources of the channel that are overlapping with at least one of the SSB transmissions via the cell scheduling the resources for the channel are the unavailable resources, and that the resources for the channel are non-overlapping with synchronization signal block (SSB) transmissions for one or more other PCIs of the group of PCIs;
determine the configuration for the rate matching based on the rule by determining to rate match around the unavailable resources or the resources overlapping with the at least one of the SSB transmissions via the cell; and
receive the channel via the one or more cells in accordance with the determination.

### Claim 26

An apparatus for wireless communication by a base station (BS), comprising:
memory; and
one or more processors coupled to the memory, the one or more processors being configured, individually or collectively, to:
transmit, to a user equipment (UE), an indication of a rule to be used for determining a configuration for rate matching around unavailable resources of a channel, the channel to be transmitted via one or more cells associated with one or more selected PCIs of a group of PCIs configured using lower layer signaling for the UE;
transmit, via a cell associated with a PCI of the one or more selected PCIs, an indication scheduling resources for the channel;
transmit signaling indicating resources allocated for synchronization signal block (SSB)transmissions for the group of PCIs, wherein the indication of the rule comprises an indication that at least a portion of the resources of the channel that are overlapping with at least one of the SSB transmissions via the cell scheduling the resources for the channel are the unavailable resources, and that the resources for the channel are non-overlapping with SSB transmissions for one or more other PCIs of the group of PCIs;
generate the channel in accordance with the configuration for rate matching; and
transmit the channel to the UE.