# US 2013/0278707 A1 · Video communication method and terminal

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- Number: US 2013/0278707 A1
- Document ID: US20130278707A1
- Status: Published application
- Kind: A1
- Application number: 13/978,264
- Filed: 2011-03-04
- Published: 2013-10-24
- Earliest claimed: 2011-01-18
- Assignees: Zte Corporation
- Inventors: Hui Yang
- Web page: https://patentgrep.com/patent/US20130278707A1

## CPC

- H04N 7/148: {Interfacing a video terminal to a particular transmission medium, e.g. ISDN}
- H04L 65/1069: Session establishment or de-establishment
- H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
- H04W 84/18: Self-organising networks, e.g. ad-hoc networks or sensor networks
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

The disclosure provides a method for realizing visual communication and a terminal. The method includes: the initiating terminal and the receiving terminal of the visual communication establish a Bluetooth wireless communication link between the initiating terminal and the receiving terminal via the respective Bluetooth module thereof; and the initiating terminal and the receiving terminal transmit the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication. In the disclosure, the Bluetooth technology and the low rate audio/video coding technology are combined effectively with the feature that the connection and networking are flexible and diversified and the capability of transmitting via a low bandwidth channel.

## Claims

### Claim 1

A method for realizing visual communication, comprising:
an initiating terminal and a receiving terminal of the visual communication establishing a Bluetooth wireless communication link between the initiating terminal and the receiving terminal via respective Bluetooth module thereof; and
the initiating terminal and the receiving terminal transmitting multimedia information via the established Bluetooth wireless communication link to carry out the visual communication.

### Claim 2 (depends on 1)

The method according to claim 1, wherein
before the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link, the method further comprises: the initiating terminal and the receiving terminal transmitting control information to each other so as to indicate the opposite end to adjust a transceiving power of the Bluetooth module thereof to a preset target value; and
the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link comprises: the initiating terminal and the receiving terminal taking the preset target value indicated by the received control information as a current transceiving power of the Bluetooth module and transmitting the multimedia information via the established Bluetooth wireless communication link.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the initiating terminal and the receiving terminal transmitting the control information to each other so as to indicate the opposite end to adjust the transceiving power of the Bluetooth module thereof to the preset target value comprises:
the initiating terminal sending a first control information to the receiving terminal to indicate the receiving terminal to adjust the transceiving power of the Bluetooth module of the receiving terminal to the preset target value indicated by the first control information: and
when adjusting the transceiving power of the Bluetooth module of the receiving terminal to the preset target value indicated by the first control information is completed, the receiving terminal sending a second control information to the initiating terminal to indicate the initiating terminal to adjust the transceiving power of the Bluetooth module of the initiating terminal to the preset target value indicated by the second control information.

### Claim 4 (depends on 2)

The method according to claim 2, wherein the preset target value indicated by the control information is the maximum transceiving power of the Bluetooth module of the terminal which receives the control information.

### Claim 5 (depends on 2)

The method according to claim 2, wherein the control information is sent by a link management protocol (LMP) entity of the Bluetooth module via an LMP protocol data unit (PDU).

### Claim 6 (depends on 1)

The method according to claim 1, wherein the initiating terminal and the receiving terminal of the visual communication establishing the Bluetooth wireless communication link between the initiating terminal and the receiving terminal via the respective Bluetooth module thereof comprises:
a video call control (VCC) entity in the Bluetooth module of the initiating terminal receiving an instruction sent by an application of the initiating terminal for establishing the Bluetooth wireless communication link via an interface;
the VCC entity controlling a baseband layer to start up a process of query, paging, query scanning and paging scanning via the interface; and
the VCC entity controlling the LMP entity to establish and issue the Bluetooth wireless communication link with the receiving terminal via the interface.

### Claim 7 (depends on 6)

The method according to claim 6, wherein the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication comprises:
the VCC entity controlling a connection of an internal visual path by using a voice and video synchronization control interface, wherein the application is on the established Bluetooth wireless communication link, the application transmitting the multimedia information with an application of the receiving terminal via the internal visual path so as to carry out the visual communication.

### Claim 8 (depends on 6)

The method according to claim 6, wherein before the initiating terminal and the receiving terminal transmitting the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication, the method further comprises:
the VCC entity feeding back a message that the Bluetooth wireless communication link is established successfully to the application of the initiating terminal; and
the application of the initiating terminal and the application of the receiving terminal carrying out an opposite layer multiplexing information interaction and a logical channel communication using an H.324 signaling.

### Claim 9 (depends on 8)

The method according to claim 8, wherein after carrying out the visual communication, the method further comprises:
the initiating terminal or the receiving terminal initiating a visual communication end command to the opposite end;
removing the logical channel between the initiating terminal and the receiving terminal; and
removing the Bluetooth wireless communication link between the initiating terminal and the receiving terminal.

### Claim 10 (depends on 1)

The method according to claim 1, wherein the Bluetooth wireless communication link is a synchronous connection-oriented (SCO) link.

### Claim 11

A terminal, comprising:
a Bluetooth module, configured to interact with a Bluetooth module of an opposite end and establish a Bluetooth wireless communication link between the terminal and the opposite end; and
a visual communication module, configured to transmit multimedia information via the established Bluetooth wireless communication link with the opposite end to carry out visual communication.

### Claim 12 (depends on 11)

The terminal according to claim 11, wherein,
the terminal further comprises: a control transceiving module, configured to send to the opposite end a first control information indicating to adjust a transceiving power of the Bluetooth module of the opposite end to a preset target value, and receive from the terminal a second control information indicating to adjust a transceiving power of the Bluetooth module of the terminal to the preset target value; and
the visual communication module, configured to take the preset target value indicated by the second control information as a current transceiving power of the Bluetooth module of the terminal, and transmit the multimedia information via the established Bluetooth wireless communication link to carry out the visual communication.

### Claim 13 (depends on 3)

The method according to claim 3, wherein the preset target value indicated by the control information is the maximum transceiving power of the Bluetooth module of the terminal which receives the control information.

### Claim 14 (depends on 3)

The method according to claim 3, wherein the control information is sent by a link management protocol (LMP) entity of the Bluetooth module via an LMP protocol data unit (PDU).

### Claim 15 (depends on 2)

The method according to claim 2, wherein the Bluetooth wireless communication link is a synchronous connection-oriented (SCO) link.

### Claim 16 (depends on 3)

The method according to claim 3, wherein the Bluetooth wireless communication link is a synchronous connection-oriented (SCO) link.

### Claim 17 (depends on 6)

The method according to claim 6, wherein the Bluetooth wireless communication link is a synchronous connection-oriented (SCO) link.

### Claim 18 (depends on 7)

The method according to claim 7, wherein the Bluetooth wireless communication link is a synchronous connection-oriented (SCO) link.

### Claim 19 (depends on 8)

The method according to claim 8, wherein the Bluetooth wireless communication link is a synchronous connection-oriented (SCO) link.

### Claim 20 (depends on 9)

The method according to claim 9, wherein the Bluetooth wireless communication link is a synchronous connection-oriented (SCO) link.