# US 2022/0045830 A1 · User apparatus

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- Number: US 2022/0045830 A1
- Document ID: US20220045830A1
- Status: Published application
- Kind: A1
- Application number: 17/281,349
- Filed: 2018-10-03
- Published: 2022-02-10
- Earliest claimed: 2018-10-03
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Ryosuke Osawa; Huan Wang; Xufei Zheng; Xiaolin Hou; Xinxin He; Jie Lv; Jiaqi Zhao; Tao Luo
- Web page: https://patentgrep.com/patent/US20220045830A1

## CPC

- H04L 5/0073: {Allocation arrangements that take into account other cell interferences}
- H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04L 5/0066: {Requirements on out-of-channel emissions}
- H04W 4/021: Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
- H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC]
- H04W 72/542: using measured or perceived quality
- H04W 76/14: Direct-mode setup
- 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 5/0062: {Avoidance of ingress interference, e.g. ham radio channels}
- H04W 84/005: {Moving wireless networks}
- H04W 92/18: between terminal devices
- 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

A user apparatus includes: a receiver configured to perform predetermined measurement for a resource set in direct communication between terminals, the resource set having a likelihood of being used by another group to which the user apparatus does not belong; a control unit configured to determine, based on a result of the predetermined measurement, whether an effect from said another group having a likelihood of using the resource set is acceptable; and a transmitter configured to use the resource set to perform transmission to another user apparatus when a determination is made that the effect from said another group that uses the resource set is acceptable.

## Claims

### Claim 1

A user apparatus comprising:
a receiver configured to perform predetermined measurement for a resource set in direct communication between terminals, the resource set having a likelihood of being used by another group to which the user apparatus does not belong;
a control unit configured to determine, based on a result of the predetermined measurement, whether an effect from said another group having a likelihood of using the resource set is acceptable; and
a transmitter configured to use the resource set to perform transmission to another user apparatus when a determination is made that the effect from said another group that uses the resource set is acceptable.

### Claim 2 (depends on 1)

The user apparatus as claimed in claim 1, wherein the control unit determines, based on the result of the predetermined measurement, whether said another group using the resource set exists within a distance at which the resource set is reusable.

### Claim 3 (depends on 1)

The user apparatus as claimed in claim 1, wherein the control unit:
determines, as a threshold, a value calculated from RSRP (Reference Signal Received Power) sample values obtained by the receiver by measuring a reference signal related to the resource set at a time, by sorting the RSRP sample values in ascending order, and averaging the RSRP sample values within a predetermined ratio from a minimum value of the sorted RSRP sample values; and
when an RSRP sample value obtained by the receiver by measuring the reference signal related to the resource set at another time falls below the determined threshold, determines that the effect from said another group having the likelihood of using the resource set is acceptable.

### Claim 4 (depends on 3)

The user apparatus as claimed in claim 3, wherein the determination is performed by adding an offset value to the determined threshold when a packet requiring a low latency is to be transmitted.

### Claim 5 (depends on 3)

The user apparatus as claimed in claim 3, wherein the determination is performed by adding an offset value to the determined threshold when determining whether to reselect the resource set.

### Claim 6 (depends on 3)

The user apparatus as claimed in claim 3, wherein the determined threshold is reported to a base station apparatus or is reported to a user apparatus that performs scheduling.