# US 12,193,105 B2 · Method and device used for discontinuous reception in wireless communication

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- Number: US 12,193,105 B2
- Document ID: US12193105B2
- Status: Granted
- Kind: B2
- Application number: 17/673,759
- Filed: 2022-02-16
- Published: 2022-06-02
- Granted: 2025-01-07
- Earliest claimed: 2020-02-13
- Assignees: Shanghai Langbo Communication Technology Company Limited
- Applicants: Bunker Hill Technologies LLC
- Inventors: Xiaobo Zhang
- Web page: https://patentgrep.com/patent/US12193105B2

## CPC

- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 80/02: Data link layer protocols
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

The present disclosure provides a method and device used for discontinuous reception (DRX) for wireless communications. A first node receives first information, the first information indicates a first identity (ID); determines a start time of a first timer according to the first ID; at the start time of the first timer, starts the first timer; when the first timer is running, monitors a first radio signal in each candidate slot; herein, the first ID belongs to a link-layer ID; the start time of the first timer is a start time of a first time interval. The present disclosure determines a start time of a first timer according to a first ID, which can randomize start times of user's DRX, avoiding possible system congestion and increasing transmission accuracy.

## Claims

### Claim 1

A first node for wireless communications, comprising:
a first receiver, receiving first information, the first information indicating a first identity (ID), the first ID belonging to a link-layer ID; determining a start time of a first timer according to the first ID; at the start time of the first timer, starting the first timer; and
a second receiver, when the first timer is running, monitoring a first radio signal in each candidate slot;
wherein the start time of the first timer is a start time of a first time interval; a remainder of an index of a first subframe in an FN (Frame Number) period divided by a first time length is the same as a remainder of the first ID divided by the first time length;
the first subframe comprises the first time interval.

### Claim 2 (depends on 1)

The first node according to claim 1, comprising:
the second receiver, when the first timer is running, updating the first timer in each second time interval.

### Claim 3 (depends on 1)

The first node according to claim 1, comprising:
the first receiver, receiving second information, the second information indicating a first expiration value of the first timer.

### Claim 4 (depends on 1)

The first node according to claim 1, wherein the first time length is a drx-ShortCycle, or a drx-LongCycle.

### Claim 5 (depends on 1)

The first node according to claim 1, comprising:
the first receiver, receiving third information, the third information indicating an FN and a subframe number;
wherein the FN and the subframe number are used for determining the index of the first subframe in the FN period.

### Claim 6 (depends on 1)

The first node according to claim 1, comprising:
the first receiver, receiving a first signaling;
wherein the first signaling is a MAC (Medium Access Control) control element used for DRX (Discontinuous Reception).

### Claim 7

A second node for wireless communications, comprising:
a second transmitter, transmitting first information, the first information comprising a first identity) ID, the first ID belonging to a link-layer ID; and
a third transmitter, when a first timer is running, transmitting a first radio signal in a candidate slot;
wherein the first ID is used for indicating a start time of the first timer; at the start time of the first timer, the first timer is started; the start time of the first timer is a start time of a first time interval; a remainder of an index of a first subframe in an FN (Frame Number) period divided by a first time length is the same as a remainder of the first ID divided by the first time length;
the first subframe comprises the first time interval.

### Claim 8 (depends on 7)

The second node according to claim 7, comprising:
the second transmitter, transmitting second information, the second information comprising a first expiration value of the first timer.

### Claim 9 (depends on 7)

The second node according to claim 7, wherein the first time length is a drx-ShortCycle, or a drx-LongCycle.

### Claim 10 (depends on 7)

The second node according to claim 7, comprising:
the second transmitter, transmitting third information, and the third information indicating an FN and a subframe number;
wherein the FN and the subframe number are used for indicating the index of the first subframe in the FN period.

### Claim 11 (depends on 7)

The second node according to claim 7, comprising:
the second transmitter, transmitting a first signaling;
wherein the first signaling is a MAC (Medium Access Control) control element used for DRX (Discontinuous Reception).

### Claim 12

A method in a first node for wireless communications, comprising:
receiving first information, the first information indicating a first (identity) ID, the first ID belonging to a link-layer ID; determining a start time of a first timer according to the first ID; at the start time of the first timer, starting the first timer; and
when the first timer is running, monitoring a first radio signal in each candidate slot;
wherein the start time of the first timer is a start time of a first time interval; a remainder of an index of a first subframe in an FN (Frame Number) period divided by a first time length is the same as a remainder of the first ID divided by the first time length;
the first subframe comprises the first time interval.

### Claim 13 (depends on 12)

The method in a first node according to claim 12, comprising:
when the first timer is running, updating the first timer in each second time interval.

### Claim 14 (depends on 12)

The method in a first node according to claim 12, comprising:
receiving second information, the second information indicating a first expiration value of the first timer.

### Claim 15 (depends on 12)

The method in a first node according to claim 12, wherein the first time length is a drx-ShortCycle, or a drx-LongCycle.

### Claim 16 (depends on 12)

The method in a first node according to claim 12, comprising:
receiving third information, the third information indicating an FN and a subframe number;
wherein the FN and the subframe number are used for determining the index of the first subframe in the FN period.

### Claim 17 (depends on 12)

The method in a first node according to claim 12, comprising:
receiving a first signaling;
wherein the first signaling is a MAC (Medium Access Control) control element used for DRX (Discontinuous Reception).