# US 2021/0345334 A1 · Method And Apparatus For Data Transmission With Multiple Uplink Carrier In Mobile Communications

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- Number: US 2021/0345334 A1
- Document ID: US20210345334A1
- Status: Published application
- Kind: A1
- Application number: 17/374,027
- Filed: 2021-07-13
- Published: 2021-11-04
- Earliest claimed: 2016-09-20
- Assignees: Mediatek Inc.
- Applicants: MediaTek Inc.
- Inventors: Yih-Shen Chen; Shun-An Yang; Chih Hsiu Lin; Guan-Yu Lin
- Web page: https://patentgrep.com/patent/US20210345334A1

## CPC

- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 52/38: TPC being performed in particular situations
- H04W 76/15: Setup of multiple wireless link connections
- H04W 52/242: {taking into account path loss}
- H04W 52/346: {distributing total power among users or channels}
- H04W 52/365: {Power headroom reporting}
- H04W 72/02: Selection of wireless resources by user or terminal
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Various solutions for data transmission over multiple uplink carrier with respect to user equipment (UE) in mobile communications are described. A UE may establish a connection over a downlink component carrier and a first uplink component carrier with a network apparatus. The UE may further establish a connection over a second uplink component carrier with the network apparatus. The UE may transmit uplink data to the network apparatus via at least one of the first uplink component carrier and the second uplink component carrier. The UE may also assign the first uplink component carrier as a primary carrier and assigning the second uplink component carrier as a supplementary carrier. The UE may further switch the primary carrier from the first uplink component carrier to the second uplink component carrier.

## Claims

### Claim 1

A method, comprising:
performing, by a processor of an apparatus, cell selection to select a downlink component carrier;
receiving, by the processor of the apparatus, broadcast information via the downlink component carrier;
assessing, by the processor of the apparatus, a plurality of uplink component carriers according to the broadcast information;
selecting, by the processor of the apparatus, a first uplink component carrier from the plurality of uplink component carriers; and
performing, by the processor of the apparatus, initial access procedure via the first uplink component carrier.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
receiving, by the processor of the apparatus, configuration of a second uplink component carrier via the downlink component carrier; and
establishing, by the processor of the apparatus, a connection over the second uplink component carrier.

### Claim 3 (depends on 1)

The method of claim 1, wherein the broadcast information comprises frequency and bandwidth information of each uplink component carrier and a criterion for assessing the plurality of uplink component carriers.

### Claim 4 (depends on 1)

The method of claim 1, wherein the broadcast information comprises initial access parameters of each uplink component carrier.

### Claim 5 (depends on 1)

The method of claim 1, wherein performing initial access procedure further comprises:
transmitting, by the processor of the apparatus, a preamble message via the first uplink component carrier; and
receiving, by the processor of the apparatus, a response message via the downlink component carrier,
wherein the response message comprises component carrier information of the first uplink component carrier.

### Claim 6

A method, comprising:
transmitting, by a processor of an apparatus, frequency and bandwidth information of each of a plurality of uplink component carriers in broadcast information; and
receiving, by the processor of the apparatus, a preamble message from a user equipment (UE) via a first uplink component carrier,
wherein the first uplink component carrier is one of the plurality of uplink component carriers.

### Claim 7 (depends on 6)

The method of claim 6, further comprising:
transmitting, by the processor of the apparatus, a response message to the UE via a downlink component carrier,
wherein the response message comprises component carrier information of the first uplink component carrier.

### Claim 8 (depends on 7)

The method of claim 7, further comprising:
transmitting, by the processor of the apparatus, configuration of a second uplink component carrier to the UE via the downlink component carrier; and
establishing, by the processor of the apparatus, a connection over the second uplink component carrier with the UE.

### Claim 9 (depends on 8)

The method of claim 8, wherein the broadcast information comprises a criterion for the UE to select the first uplink component carrier and initial access parameters of each uplink component carrier for the UE to transmit the preamble message.

### Claim 10 (depends on 8)

The method of claim 8, further comprising:
receiving, by the processor of the apparatus, a power headroom report from the UE; and
transmitting, by the processor of the apparatus, a command for triggering component carrier switching to the UE.