# US 2021/0345430 A1 · Data transmission method for sidelink communication, device, and system

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- Number: US 2021/0345430 A1
- Document ID: US20210345430A1
- Status: Published application
- Kind: A1
- Application number: 17/280,517
- Filed: 2018-09-28
- Published: 2021-11-04
- Earliest claimed: 2018-09-28
- Assignees: Beijing Xiaomi Mobile Software Co., Ltd.
- Applicants: Beijing Xiaomi Mobile Software Co., Ltd.
- Inventors: Qun ZHAO
- Web page: https://patentgrep.com/patent/US20210345430A1

## CPC

- H04W 76/14: Direct-mode setup
- H04W 76/40: for selective distribution or broadcast
- H04L 5/0005: {Time-frequency}
- H04W 4/021: Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
- H04W 4/46: for vehicle-to-vehicle communication [V2V]
- H04L 5/0069: {Allocation based on distance or geographical location}
- H04L 61/5038: for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
- H04L 2101/622: Layer-2 addresses, e.g. medium access control [MAC] addresses
- H04L 2101/69: using geographic information, e.g. room number
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

The present disclosure relates to the field of communications and provides a data transmission method for sidelink communication and a device. The method can include a first Internet-of-vehicle device that determines a destination reception geographical location of a user data packet and generates a MAC PDU corresponding to the user data packet. The MAC PDU can carry the destination reception geographical location. The first Internet-of-vehicle device encodes and modulates the MAC PDU to obtain physical layer data, and sends the physical layer data on a target time-frequency resource. A second Internet-of-vehicle device compares the destination reception geographical location carried by the MAC PDU to determine whether to receive the user data packet.

## Claims

### Claim 1

A data transmission method for sidelink communication, the method being applied to a first Internet-of-vehicle device and comprising:
determining, a destination reception geographical location of a user data packet;
generating a media access control packet data unit (MAC PDU) corresponding to the user data packet, where the MAC PDU carries the destination reception geographical location;
encoding and modulating the MAC PDU in order to obtain physical layer data; and
transmitting, the physical layer data on a target time-frequency resource.

### Claim 2 (depends on 1)

The method of claim 1, wherein the destination reception geographical location is represented by:
a sub-region identifier, or
a sub-region identifier and a coverage radius.

### Claim 3 (depends on 2)

The method of claim 2, wherein the sub-region identifier is configured to identify at least one of:
a first sub region obtained by dividing the Earth's surface, the first sub region being obtained by using a grid division method or a hexagonal division method,
a second sub region obtained by dividing a road, the second sub region being obtained by using at least one of a road section division method and a lane division method, and
a third sub region obtained by administrative division, the third sub region being obtained by using a country division method, a city division method, or a minimum administrative jurisdiction division method.

### Claim 4 (depends on 2)

The method of claim 2, wherein, sub-region identifiers corresponding to at least two sub regions are same, and a distance between the at least two sub regions with the same sub-region identifier is greater than a threshold.

### Claim 5

(canceled)

### Claim 6 (depends on 1)

The method of claim 1, wherein the MAC PDU further carries a source transmission geographical location.

### Claim 7 (depends on 6)

The method of claim 6, wherein, the source transmission geographical location is represented by a sub-region identifier, and the method further comprises:
obtaining a current geographical location via a positioning component; and
determining a sub-region identifier corresponding to the current geographical location based on a mapping relation that is a correspondence relation between geographical locations and sub-region identifiers.

### Claim at position 8

8-9. (canceled)

### Claim 10

A data transmission method for sidelink communication, the method being applied to a second Internet-of-vehicle device and comprising:
receiving physical layer data on a target time-frequency resource;
decoding and demodulating the physical layer data in order to obtain a (media access control packet data unit (MAC PDU);
obtaining a destination reception geographical location from the MAC PDU; and
transferring a user data packet in the MAC PDU to an application layer for processing when the destination reception geographical location and a geographical location of the second Internet-of-vehicle device satisfy a preset condition.

### Claim 11 (depends on 10)

The method of claim 10, wherein:
the destination reception geographical location is represented by a sub-region identifier;
transferring the user data packet in the MAC PDU to the application layer for processing when the destination reception geographical location and the geographical location of the second Internet-of-vehicle device satisfies the preset condition comprises:
transferring the user data packet in the MAC PDU to the application layer for processing when determining that the geographical location of the second Internet-of-vehicle device belongs to a sub region corresponding to the sub-region identifier based on a mapping relation.

### Claim 12 (depends on 10)

The method of claim 10, wherein:
the destination reception geographical location is represented by a sub-region identifier and a coverage radius;
transferring the user data packet in the MAC PDU to the application layer for processing when the destination reception geographical location and the geographical location of the second Internet-of-vehicle device satisfies the preset condition comprises:
determining a coverage region based on a central point and the coverage radius, wherein the central point is a point in a sub region identified by the sub-region identifier; and
transferring the user data packet in the MAC PDU to the application layer for processing when determining that the geographical location of the second Internet-of-vehicle device belongs to the coverage region based on a mapping relation.

### Claim 13

(canceled)

### Claim 14 (depends on 11)

The method of claim 11, wherein the sub-region identifier is configured to identify at least one of:
a first sub region obtained by dividing the Earth's surface, and the first sub region is obtained by using a grid division method or a hexagonal division method,
a second sub region obtained by dividing a road, and the second sub region is obtained by using at least one of a road section division method and a lane division method, and
a third sub region obtained by administrative division, and the third sub region is obtained by using a country division method, a city division method, or a minimum administrative jurisdiction division method.

### Claim 15 (depends on 11)

The method of claim 11, wherein, sub-region identifiers corresponding to at least two sub regions are the same, and a distance between the at least two sub regions with the same sub-region identifier is greater than a threshold.

### Claim 16

(canceled)

### Claim 17 (depends on 10)

The method of claim 10, wherein the MAC PDU further carries a source transmission geographical location.

### Claim 18

A data transmission method for sidelink communication, the method being applied to a first Internet-of-vehicle device and comprising:
determining a destination reception geographical location of a user data packet;
transmitting control information to a second Internet-of-vehicle device, wherein the control information is configured to indicate reception related information of physical layer data and carry the destination reception geographical location; and
transmitting the physical layer data.

### Claim 19 (depends on 18)

The method of claim 18, wherein transmitting the physical layer data further comprises:
generating media access control packet data unit (MAC PDU) corresponding to the user data packet, where the MAC PDU carries the destination reception geographical location;
encoding and modulating the MAC PDU in order to obtain the physical layer data; and
transmitting the physical layer data on a target time-frequency resource.

### Claim 20 (depends on 18)

The method of claim 18, wherein the destination reception geographical location is represented by:
a sub-region identifier, or
a sub-region identifier and a coverage radius.

### Claim 21 (depends on 20)

The method of claim 20, wherein the sub-region identifier is configured to identify at least one of:
a first sub region obtained by dividing the Earth's surface, and the first sub region is obtained by using a grid division method or a hexagonal division method,
a second sub region obtained by dividing a road, and the second sub region is obtained by using at least one of a road section division method or a lane division method, and
a third sub region obtained by administrative division, and the third sub region is obtained by using a country division method, a city division method, or a minimum administrative jurisdiction division method.

### Claim 22 (depends on 20)

The method of claim 20, wherein, sub-region identifiers corresponding to at least two sub regions are same, and a distance between the at least two sub regions with the same sub-region identifier is greater than a threshold.

### Claim 23

(canceled)

### Claim 24 (depends on 18)

The method of claim 18, wherein the control information further carries a source transmission geographical location.

### Claim 25 (depends on 24)

The method of claim 24, wherein the source transmission geographical location is represented by a sub-region identifier, and the method further comprises:
obtaining a current geographical location via a positioning component; and
determining a sub-region identifier corresponding to the current geographical location based on a mapping relation, wherein the mapping relation is a correspondence relation between geographical locations and sub-region identifiers.

### Claim at position 25

26-27. (canceled)

### Claim 28

A data transmission method for sidelink communication, the method being applied to a second Internet-of-vehicle device and comprising:
receiving control information sent by a first Internet-of-vehicle device, where the control information is configured to indicate reception related information of physical layer data;
obtaining a destination reception geographical location from the control information; and
receiving the physical layer data based on the control information when the destination reception geographical location and a geographical location of the second Internet-of-vehicle device satisfying a preset condition.

### Claim 29 (depends on 28)

The method of claim 28, wherein:
the destination reception geographical location is represented by a sub-region identifier;
receiving the physical layer data based on the control information when the destination reception geographical location and the geographical location of the second Internet-of-vehicle device satisfies the preset condition further comprises:
receiving the physical layer data based on the control information to when determining that the geographical location of the second Internet-of-vehicle device belongs to a sub region corresponding to the sub-region identifier based on a mapping relation.

### Claim 30 (depends on 28)

The method of claim 28, wherein:
the destination reception geographical location is represented by a sub-region identifier and a coverage radius;
receiving the physical layer data based on the control information when the destination reception geographical location and the geographical location of the second Internet-of-vehicle device satisfies the preset condition further comprises:
determining a coverage region based on a central point and the coverage radius, where the central point is a point in a sub region identified by the sub-region identifier; and
receiving the physical layer data based on the control information when determining that the geographical location of the second Internet-of-vehicle device belongs to the coverage region based on a mapping relation.

### Claim 31

(canceled)

### Claim 32 (depends on 30)

The method of claim 30, wherein:
the sub-region identifier is configured to identify:
a first sub region obtained by dividing the Earth's surface, and the first sub region is obtained by using a grid division method or a hexagonal division method,
a second sub region obtained by dividing a road, and the second sub region is obtained by using at least one of a road section division method and a lane division method, or
a third sub region obtained by administrative division, and the third sub region is obtained by using a country division method, a city division method, or a minimum administrative jurisdiction division method.

### Claim 33 (depends on 30)

The method of claim 30, wherein, sub-region identifiers corresponding to at least two sub regions are same, and a distance between the at least two sub regions with the same sub-region identifier is greater than a threshold.

### Claim 34

(canceled)

### Claim 35 (depends on 28)

The method of claim 28, wherein the control information further carries a source transmission geographical location.

### Claim at position 34

36-40. (canceled)

### Claim 41 (depends on 1)

An Internet-of-vehicle device, comprising:
a processor;
a transceiver connected to the processor; and
a memory that is configured to store instructions executable by the processor,
wherein the processor is configured to load and execute the instructions to perform the method of claim 1.

### Claim 42

(canceled)