# US 11,445,409 B2 · Data transmission method and terminal, and computer-readable medium

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- Number: US 11,445,409 B2
- Document ID: US11445409B2
- Status: Granted
- Kind: B2
- Application number: 17/171,626
- Filed: 2021-02-09
- Published: 2021-06-03
- Granted: 2022-09-13
- Earliest claimed: 2016-06-29
- Assignees: Beijing Xiaomi Mobile Software Co., Ltd.
- Applicants: Beijing Xiaomi Mobile Software Co., Ltd.
- Inventors: Wei Hong; Juejia Zhou; Ming Zhang
- Web page: https://patentgrep.com/patent/US11445409B2

## CPC

- H04W 28/20: Negotiating bandwidth
- H04W 28/0236: {radio quality, e.g. interference, losses or delay}
- H04W 28/08: Load balancing or load distribution (transferring a connection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12)
- H04W 28/0835: {Access entity, e.g. eNB}
- H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)}
- H04W 72/1215: {for collaboration of different radio technologies}
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Provided is a method of data transmission. The method includes determining a current amount of data in an uplink buffer that is configured to store uplink data, wherein the uplink data in the uplink buffer is distributed through a Packet Data Convergence Protocol (PDCP) layer; sending a Buffer Status Report (BSR) to a base station in the cellular network, wherein the BSR comprises a difference value between the current amount of data and an amount of the data to be transmitted by the second link, and wherein the base station is configured to allocate an uplink resource for the terminal based on the difference value; and transmitting uplink data to the correspondent node through the second link based on the amount of the data to be transmitted to the correspondent node by the second link.

## Claims

### Claim 1

A method of data transmission, applied to a terminal that establishes a communication connection with a correspondent node through a first link provided by a cellular network and a second link provided by a Wireless Local Area Network (WLAN), respectively, the method comprising:
determining a current amount of data in an uplink buffer that is configured to store uplink data, wherein the uplink data in the uplink buffer is distributed through a Packet Data Convergence Protocol (PDCP) layer;
sending a Buffer Status Report (BSR) to a base station in the cellular network, wherein the BSR comprises a difference value between the current amount of data and an amount of the data to be transmitted by the second link, and wherein the base station is configured to allocate an uplink resource for the terminal based on the difference value; and
transmitting uplink data to the correspondent node through the second link based on the amount of the data to be transmitted to the correspondent node by the second link.

### Claim 2 (depends on 1)

The method according to claim 1, further comprising:
acquiring the uplink resource allocated by the base station.

### Claim 3 (depends on 1)

The method according to claim 1, further comprising:
acquiring a network status; and
adjusting an amount of data transmitted by one of the first link and the second link based on the network status.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the network status comprises at least one of a link quality of the first link, a link quality of the second link, a load condition of the cellular network, and/or a load condition of the WLAN.

### Claim 5

A terminal that establishes a communication connection with a correspondent node through a first link provided by a cellular network and a second link provided by a Wireless Local Area Network (WLAN), respectively, the terminal comprising:
a processor; and
a memory for storing instructions executable by the processor,
wherein the processor is configured to:
determine a current amount of data in an uplink buffer that is configured to store uplink data, wherein the uplink data in the uplink buffer is distributed through a Packet Data Convergence Protocol (PDCP) layer;
send a Buffer Status Report (BSR) to a base station in the cellular network, wherein the BSR comprises a difference value between the current amount of data and an amount of the data to be transmitted by the second link, and wherein the base station is configured to allocate an uplink resource for the terminal based on the difference value; and
transmit uplink data to the correspondent node through the second link based on the amount of the data to be transmitted to the correspondent node by the second link.

### Claim 6 (depends on 5)

The terminal according to claim 5, wherein the processor is further configured to:
acquire the uplink resource allocated by the base station.

### Claim 7 (depends on 5)

The terminal according to claim 5, wherein the processor is further configured to:
acquire a network status; and
adjust an amount of data transmitted by one of the first link and the second link based on the network status.

### Claim 8 (depends on 7)

The terminal according to claim 7, wherein the network status comprises at least one of a link quality of the first link, a link quality of the second link, a load condition of the cellular network, and/or a load condition of the WLAN.

### Claim 9

A non-transitory computer-readable medium storing instructions that, when executed by one or more processors of a device that establishes a communication connection with a correspondent node through a first link provided by a cellular network and a second link provided by a Wireless Local Area Network (WLAN), respectively, cause the device to:
determine a current amount of data in an uplink buffer that is configured to store uplink data, wherein the uplink data in the uplink buffer is distributed through a Packet Data Convergence Protocol (PDCP) layer;
send a Buffer Status Report (BSR) to a base station in the cellular network, wherein the BSR comprises a difference value between the current amount of data and an amount of the data to be transmitted by the second link, and wherein the base station is configured to allocate an uplink resource for the terminal based on the difference value; and
transmit uplink data to the correspondent node through the second link based on the amount of the data to be transmitted to the correspondent node by the second link.

### Claim 10 (depends on 9)

The non-transitory computer-readable medium according to claim 9, wherein the device is further caused to:
acquire the uplink resource allocated by the base station.

### Claim 11 (depends on 9)

The non-transitory computer-readable medium according to claim 9, wherein the device is further caused to:
acquire a network status; and
adjust an amount of data transmitted by one of the first link and the second link based on the network status.

### Claim 12 (depends on 11)

The non-transitory computer-readable medium according to claim 11, wherein the network status comprises at least one of a link quality of the first link, a link quality of the second link, a load condition of the cellular network, and/or a load condition of the WLAN.