# US 2021/0344442 A1 · Rate matching resource mapping in wireless communications

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- Number: US 2021/0344442 A1
- Document ID: US20210344442A1
- Status: Published application
- Kind: A1
- Application number: 17/368,248
- Filed: 2021-07-06
- Published: 2021-11-04
- Earliest claimed: 2019-01-04
- Assignees: Zte Corporation
- Applicants: ZTE Corporation
- Inventors: Chuangxin JIANG; Zhaohua LU; Yu Ngok LI; Xinquan YE; Huahua XIAO; Wenjun YAN; Zhen HE; Shujuan ZHANG
- Web page: https://patentgrep.com/patent/US20210344442A1

## CPC

- H04L 1/0013: {Rate matching, e.g. puncturing or repetition of code symbols}
- H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals}
- H04L 1/001: {applied to control information}
- H04L 5/0035: {Resource allocation in a cooperative multipoint environment}
- 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 5/0092: {Indication of how the channel is divided}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A method of wireless communication includes grouping, by a network device, rate matching resources into a plurality of first groups for communication with a wireless terminal and transmitting a channel control indicator identifying at least a first group from the plurality of first groups of rate matching resources. In various embodiments, the rate matching resources include one or more of a rate matching pattern comprising multiple time-frequency transmission resources, a periodic zero power channel state information reference signal (ZP CSI-RS) resource set, an aperiodic ZP CSI-RS resource set, a semi-persistent ZP CSI-RS resource set, a long-term evolution cell specific reference signal (LTE CRS) resource, or a rate matching pattern group.

## Claims

### Claim 1

A method of wireless communication, comprising:
grouping, by a network device, rate matching resources into a plurality of first groups for communication with a wireless terminal, and
transmitting a channel control indicator identifying at least a first group from the plurality of first groups of rate matching resources,
wherein at least some rate matching resources in at least one of the plurality of first groups correspond to a quasi-co-located (QCL) reference signal set.

### Claim 2 (depends on 1)

The method of claim 1, wherein the channel control indicator includes one or more of:
a transmission configuration indicator (TCI) value;
a zero-power channel state information reference signal (ZP CSI-RS) trigger; or
a rate matching indicator.

### Claim 3 (depends on 1)

The method of claim 1, wherein each rate matching resource includes one or more of:
a rate matching pattern comprising multiple time-frequency transmission resources,
a periodic zero power channel state information reference signal (ZP CSI-RS) resource set,
an aperiodic ZP CSI-RS resource set,
a semi-persistent ZP CSI-RS resource set,
a long-term evolution cell specific reference signal (LTE CRS) resource, or
a rate matching pattern group.

### Claim 4 (depends on 1)

The method of claim 1, further comprising:
grouping TCI states into a plurality of second groups; and
associating, using a mapping, the plurality of first groups with the plurality of second groups.

### Claim 5 (depends on 4)

The method of claim 4, wherein each second group corresponds to one or more first groups.

### Claim 6

A method of wireless communication, comprising:
receiving, at a wireless terminal, a channel control indicator identifying at least a first group of rate matching resources from a plurality of rate matching resources; and
receiving a transmission from a network device by rate matching around some rate matching resources of the first group of rate matching resources indicated by the channel control indicator,
wherein at least some rate matching resources in at least the first group correspond to a quasi-co-located (QCL) reference signal set.

### Claim 7 (depends on 6)

The method of claim 6, wherein the channel control indicator includes one or more of:
a transmission configuration indicator (TCI) value;
a zero-power channel state information reference signal (ZP CSI-RS) trigger; or
a rate matching indicator.

### Claim 8 (depends on 6)

The method of claim 6, wherein each rate matching resource includes one or more of:
a rate matching pattern comprising multiple time-frequency transmission resources,
a periodic zero power channel state information reference signal (ZP CSI-RS) resource set,
an aperiodic ZP CSI-RS resource set,
a semi-persistent ZP CSI-RS resource set,
a long-term evolution cell specific reference signal (LTE CRS) resource, or
a rate matching pattern group.

### Claim 9 (depends on 6)

The method of claim 6, wherein TCI states are grouped in a plurality of second groups and a mapping associates the plurality of first groups with the plurality of second groups and the identified rate matching groups are determined based on the mapping, and wherein each second group corresponds to one or more first groups.

### Claim 10 (depends on 5)

The method of claim 5, wherein the channel control indicator identifies one or more first groups associated with one or more second groups indicated by the channel control indicator.

### Claim 11 (depends on 10)

The method of claim 10, wherein in case that more than one first group are identified, each identified first group is identified for each layer group of a data transmission.

### Claim 12 (depends on 5)

The method of claim 5, wherein (a) in case that more than one first group is identified, all identified first groups are identified for all layer groups of a data transmission, or (b) some aperiodic ZP CSI-RS resource set(s) are selected by a ZP CSI-RS trigger from the identified first group(s), or (c) some rate matching pattern groups are selected by a rate matching indicator from the identified first groups, or (d) a first group ID or a second group ID configured under each TCI state is associated with a phase tracking reference signal (PTRS) port.

### Claim 13 (depends on 1)

The method of claim 1, wherein one or more of the following rate matching resources are unavailable for the corresponding layer group(s) of the data transmission:
selected aperiodic ZP CSI-RS resource set(s) indicated by the channel control indicator,
selected rate matching pattern group(s) indicated by the channel control indicator, or
other non-aperiodic rate matching resources within the identified first group(s).

### Claim 14

A wireless communication method, comprising:
receiving, by a wireless terminal, a medium access control (MAC) layer control element indicative of one or more transmission configuration states to be used by the wireless terminal;
determining, using a mapping, a rate matching resource group from a plurality of rate matching groups corresponding to the one or more transmission configuration states; and
performing rate matching around rate matching resources corresponding to the one or more transmission configuration states indicated by the MAC layer control element.

### Claim 15 (depends on 14)

The method of claim 14, wherein the wireless terminal receives the mapping from a radio resource layer message from a network device.

### Claim 16 (depends on 14)

The method of claim 14, wherein at least one rate matching resource group includes multiple rate matching configurations, and wherein at least one of the multiple rate matching configurations corresponds to a quasi-co-located reference signal set.

### Claim 17 (depends on 14)

The method of claim 14, wherein the plurality of rate matching groups corresponds to a plurality of transmission reception points (TRPs).

### Claim 18

A method of wireless communication, comprising:
transmitting, by a network device, a medium access control (MAC) layer control element indicative of one or more transmission configuration states to be used by a wireless terminal,
wherein a mapping defines a correspondence between a rate matching resource from a plurality of rate matching resource groups,
wherein the rate matching resources are rate matched around for shared data channel transmissions from the network device to the wireless terminal, and
communicating the mapping to the wireless terminal.

### Claim 19 (depends on 18)

The method of claim 18, wherein the MAC control element includes one or more of:
a transmission configuration indicator (TCI) value;
a zero-power channel state information reference signal (ZP CSI-RS) trigger; or
a rate matching indicator.

### Claim 20 (depends on 18)

The method of claim 18, wherein each rate matching resource includes one or more of:
a rate matching pattern comprising multiple time-frequency transmission resources,
a periodic zero power channel state information reference signal (ZP CSI-RS) resource set,
an aperiodic ZP CSI-RS resource set,
a semi-persistent ZP CSI-RS resource set,
a long-term evolution cell specific reference signal (LTE CRS) resource, or
a rate matching pattern group.