# US 2021/0345313 A1 · Feedback request determination

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0345313 A1
- Document ID: US20210345313A1
- Status: Published application
- Kind: A1
- Application number: 17/280,102
- Filed: 2019-02-12
- Published: 2021-11-04
- Earliest claimed: 2019-02-12
- Assignees: Lenovo (Beijing) Limited
- Applicants: Lenovo (Beijing) Limited
- Inventors: Prateek Basu Mallick; Xiaodong Yu; Karthikeyan Ganesan; Joachim Lohr; Haipeng Lei
- Web page: https://patentgrep.com/patent/US20210345313A1

## CPC

- H04L 5/0057: {Physical resource allocation for CQI}
- H04W 72/20: Control channels or signalling for resource management
- H04L 1/1825: Adaptation of specific ARQ protocol parameters according to transmission conditions
- H04L 1/1854: {Scheduling and prioritising arrangements}
- H04L 1/1896: {ARQ related signaling}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04L 2001/0092: {Error control systems characterised by the topology of the transmission link}
- 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

Apparatuses, methods, and systems are disclosed for feedback request determination. One method (1100) includes determining (1102), at a first sidelink device, whether to request feedback corresponding to communications with a second sidelink device. The method (1100) includes, in response to determining to request feedback corresponding to the communications with the second sidelink device, transmitting (1104) first information to the second sidelink device indicating a request for feedback. The method (1100) includes transmitting (1106) second information to the second sidelink device indicating resources for communicating the feedback.

## Claims

### Claim 1

A method comprising:
determining, at a first sidelink device, whether to request feedback corresponding to communications with a second sidelink device; and
in response to determining to request feedback corresponding to the communications with the second sidelink device, transmitting first information to the second sidelink device indicating a request for feedback.

### Claim 2 (depends on 1)

The method of claim 1, wherein determining whether to request feedback corresponding to the communications with the second sidelink device comprises determining whether to request feedback based on a configuration, a quality of service, a minimum communication range configured by an upper layer, or some combination thereof.

### Claim 3

(canceled)

### Claim 4 (depends on 2)

The method of claim 2, wherein a policy indicates whether to request feedback for groupcast, unicast, broadcast, or some combination thereof.

### Claim 5

(canceled)

### Claim 6

(canceled)

### Claim 7 (depends on 1)

The method of claim 1, wherein determining to request a feedback option corresponding to the communications with the second sidelink device based on:
a number of sidelink devices configured to receive communications from the first sidelink device;
a communication range corresponding to the sidelink devices;
a quality of service parameter corresponding to the sidelink devices; or
some combination thereof.

### Claim 8 (depends on 7)

The method of claim 7, further comprising determining the number of sidelink devices based on information provided by upper layers, a physical layer discovery, a sensing procedure, or some combination thereof.

### Claim 9 (depends on 7)

The method of claim 7, wherein determining whether to request feedback corresponding to the communications with the second sidelink device comprises determining whether to request feedback based on a policy, a predetermined condition, or a combination thereof.

### Claim 10 (depends on 1)

The method of claim 1, further comprising transmitting third information from an upper layer of the first sidelink device to an access stratum of the first sidelink device, wherein the third information indicates a cast-type corresponding to a packet.

### Claim 11 (depends on 10)

The method of claim 10, wherein the cast-type comprises groupcast, broadcast, or unicast transmission.

### Claim 12 (depends on 10)

The method of claim 10, wherein the cast-type is indicated based on a first mapping between the cast type and each logical channel of the first sidelink device.

### Claim 13

(canceled)

### Claim 14

(canceled)

### Claim 15 (depends on 1)

The method of claim 1, wherein the first information comprises a bit in sidelink control information that indicates the request for feedback.

### Claim 16

(canceled)

### Claim 17 (depends on 1)

The method of claim 1, wherein the resources for communicating the feedback comprise common resources, device specific resources, or a combination thereof.

### Claim 18 (depends on 17)

The method of claim 17, wherein the common resources are predetermined for each group destination of a plurality of group destinations, derived from sidelink control information including one or more of a timeslot for physical sidelink feedback channel transmission and frequency location of scheduled physical sidelink shared channel resources, or some combination thereof.

### Claim 19 (depends on 1)

The method of claim 1, wherein, in response to the resources for communicating the feedback comprising common resources and the second sidelink device being within network coverage, a network device indicates the common time and frequency resources.

### Claim 20

(canceled)

### Claim 21

(canceled)

### Claim 22 (depends on 1)

The method of claim 1, wherein the second information comprises an explicit indication of the feedback option to the second sidelink device.

### Claim 23

(canceled)

### Claim 24

(canceled)

### Claim 25

(canceled)

### Claim 26 (depends on 1)

The method of claim 1, wherein the first information indicates that no feedback is requested, the feedback is requested for each sidelink device of a plurality of sidelink devices, the feedback is requested for one or more sidelink devices of the plurality of sidelink devices, or some combination thereof.

### Claim 27

An apparatus comprising:
a processor that determines whether to request feedback corresponding to communications with a second sidelink device; and
a transmitter that:
in response to determining to request feedback corresponding to the communications with the second sidelink device, transmits first information to the second sidelink device indicating a request for feedback.

### Claim 28 (depends on 27)

The apparatus of claim 27, wherein the processor determines whether to request feedback corresponding to the communications with the second sidelink device by the processor determining whether to request feedback based on a configuration, a quality of service, a minimum communication range configured by an upper layer, or some combination thereof.

### Claim 29

(canceled)

### Claim 30 (depends on 28)

The apparatus of claim 28, wherein a policy indicates whether to request feedback for groupcast, unicast, broadcast, or some combination thereof.

### Claim 31

(canceled)

### Claim 32

(canceled)

### Claim 33 (depends on 27)

The apparatus of claim 27, wherein the processor determines to request a feedback option corresponding to the communications with the second sidelink device based on:
a number of sidelink devices configured to receive communications from the apparatus;
a communication range corresponding to the sidelink devices;
a quality of service parameter corresponding to the sidelink devices; or
some combination thereof.

### Claim 34 (depends on 33)

The apparatus of claim 33, wherein the processor determines the number of sidelink devices based on information provided by upper layers, a physical layer discovery, a sensing procedure, or some combination thereof.

### Claim 35

(canceled)

### Claim 36

(canceled)

### Claim 37

(canceled)

### Claim 38

(canceled)

### Claim 39

(canceled)

### Claim 40

(canceled)

### Claim 41

(canceled)

### Claim 42

(canceled)

### Claim 43

(canceled)

### Claim 44

(canceled)

### Claim 45

(canceled)

### Claim 46

(canceled)

### Claim 47

(canceled)

### Claim 48

(canceled)

### Claim 49

(canceled)

### Claim 50

(canceled)

### Claim 51

(canceled)

### Claim 52

(canceled)