# US 12,004,093 B2 · Transmitting uplink signals with transmission timing derived based on a secondary cell being activated and licensed

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- Number: US 12,004,093 B2
- Document ID: US12004093B2
- Status: Granted
- Kind: B2
- Application number: 16/943,036
- Filed: 2020-07-30
- Published: 2020-11-12
- Granted: 2024-06-04
- Earliest claimed: 2015-09-14
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Esmael Hejazi Dinan
- Web page: https://patentgrep.com/patent/US12004093B2

## CPC

- H04W 56/0005: {synchronizing of arrival of multiple uplinks}
- H04W 16/14: Spectrum sharing arrangements {between different networks}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A wireless device receives configuration parameters of timing advance groups (TAGs) comprising: a primary TAG comprising a primary cell; and a secondary TAG comprising one or more licensed secondary cells and one or more unlicensed secondary cells. Uplink signals are transmitted via the secondary TAG. The transmission timing is derived employing a first secondary cell, of the secondary TAG, that is based on the first secondary cell being: an activated secondary cell; and a licensed secondary cell.

## Claims

### Claim 1

A method comprising:
receiving, by a wireless device, configuration parameters of timing advance groups (TAGs) comprising:
a primary TAG comprising a primary cell; and
a secondary TAG comprising one or more licensed secondary cells and one or more unlicensed secondary cells; and
transmitting uplink signals via the secondary TAG with transmission timing derived employing a first secondary cell, of the secondary TAG, that is based on the first secondary cell being:
an activated secondary cell; and
a licensed secondary cell.

### Claim 2 (depends on 1)

The method of claim 1, further comprising selecting the first secondary cell among the one or more licensed secondary cells and one or more unlicensed secondary cells.

### Claim 3 (depends on 1)

The method of claim 1, further comprising receiving at least one activation command to activate:
the one or more licensed secondary cells; and
the one or more unlicensed secondary cells.

### Claim 4 (depends on 3)

The method of claim 3, wherein the at least one activation command comprises a media access control (MAC) activation command.

### Claim 5 (depends on 4)

The method of claim 4, wherein an unlicensed cell of the one or more unlicensed secondary cells comprises a licensed assisted access (LAA) cell.

### Claim 6 (depends on 5)

The method of claim 5, wherein the configuration parameters comprise a TAG index.

### Claim 7 (depends on 6)

The method of claim 6, further comprising receiving a timing advance command comprising the TAG index and a timing advance value.

### Claim 8 (depends on 7)

The method of claim 7, wherein configuration parameters comprise a time alignment timer parameter for the secondary TAG.

### Claim 9 (depends on 8)

The method of claim 8, further comprising applying the timing advance value to uplink transmission timing of a TAG identified by the TAG index.

### Claim 10 (depends on 9)

The method of claim 9, further comprising selecting an unlicensed cell in a first TAG as a first timing reference cell based on:
the first TAG not comprising a licensed cell; or
the first TAG not comprising an activated licensed cell.

### Claim 11

A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive configuration parameters of timing advance groups (TAGs) comprising:
a primary TAG comprising a primary cell; and
a secondary TAG comprising one or more licensed secondary cells and one or more unlicensed secondary cells; and
transmit uplink signals via the secondary TAG with transmission timing derived employing a first secondary cell, of the secondary TAG, that is based on the first secondary cell being:
an activated secondary cell; and
a licensed secondary cell.

### Claim 12 (depends on 11)

The wireless device of claim 11, further comprising selecting the first secondary cell among the one or more licensed secondary cells and one or more unlicensed secondary cells.

### Claim 13 (depends on 11)

The wireless device of claim 11, further comprising receiving at least one activation command to activate:
the one or more licensed secondary cells; and
the one or more unlicensed secondary cells.

### Claim 14 (depends on 13)

The wireless device of claim 13, wherein the at least one activation command comprises a media access control (MAC) activation command.

### Claim 15 (depends on 14)

The wireless device of claim 14, wherein an unlicensed cell of the one or more unlicensed secondary cells comprises a licensed assisted access (LAA) cell.

### Claim 16 (depends on 15)

The wireless device of claim 15, wherein the configuration parameters comprise a TAG index.

### Claim 17 (depends on 16)

The wireless device of claim 16, further comprising receiving a timing advance command comprising the TAG index and a timing advance value.

### Claim 18 (depends on 17)

The wireless device of claim 17, wherein configuration parameters comprise a time alignment timer parameter for the secondary TAG.

### Claim 19 (depends on 18)

The wireless device of claim 18, further comprising applying the timing advance value to uplink transmission timing of a TAG identified by the TAG index.

### Claim 20

A system comprising:
a base station comprising:
one or more first processors; and
first memory storing first instructions that, when executed by the one or more first processors, cause the base station to transmit configuration parameters of timing advance groups (TAGs) comprising:
a primary TAG comprising a primary cell; and
a secondary TAG comprising one or more licensed secondary cells and one or more unlicensed secondary cells; and
a wireless device comprising:
one or more second processors; and
memory storing second instructions that, when executed by the one or more second processors, cause the wireless device to:
receive the configuration parameters; and
transmit uplink signals via the secondary TAG with transmission timing derived employing a first secondary cell, of the secondary TAG, that is based on the first secondary cell being:
an activated secondary cell; and
a licensed secondary cell.