Samsung Electronics Co., Ltd.

Ji-youn Jung

Seong-Joon Jeon

Bae-eun Jung

Hyun-Min Yoon

Myeon-Kee Youn

Soung-Kwan Kim

Soung-Kwan Kimn

Jun-Hwa Seo

Young-Sook Ryu

Taek-Ho Kim

Hui-Jae Lee

Kwang-Yong Choi

Soung-kwan Kim

Provided is a method of establishing communication between a plurality of terminals by a first client terminal of the plurality of terminals, the method including: receiving an initiation signaling message comprising a communication initiation tag and a terminal list of terminals from a host terminal of the plurality of terminals; determining whether to establish communication with the host terminal, based on a communication state of the first client terminal; generating connection information indicating whether to establish communication with the host terminal; determining a second client terminal of the plurality of terminals as a next priority terminal based on the terminal list of terminals; and transmitting the connection information and a trigger signaling message comprising a communication extension tag to the second client terminal.

Method and apparatus for establishing communication between terminals

Methods and apparatuses for setting communication with devices included in a group are provided. The method includes receiving, from a host device included in the group, a communication initiation request for setting communication between the host device and the first client device, determining whether to set communication with the host device based on a communication state of the first client device, receiving, from a second client device, a communication extension request for setting communication between the second client device and the first client device, determining whether the second client device is included in the group, and in response to the second client device being included in the group, determining whether to set communication with the second client device based on whether communication with the host device and the first client device is set.

Method and apparatus for setting communication and recording medium thereof

A method of reducing an amount of media data lost when a next handover is performed, wherein the method is performed by a first terminal for transmitting and receiving the media data to and from a second terminal, the method including: predicting an amount of the media data that may be lost when the next handover is performed; generating control information for reducing the amount of the media data lost when the next handover is performed by using the predicted amount of the media data lost when the next handover is performed; and reducing the amount of the media data lost when the next handover is performed by using the generated control information while the next handover is performed.

Method and apparatus for reducing loss of media data while handover is performed

In a Voice over Internet Protocol (VoIP) video communication method and apparatus, first and second VoIP-based terminals store video event indexes and images mapped thereto with respect to state information of a user and terminal, and establish a session using session establishment information defining the video event. The first terminal then transmits a data packet including the video event index, and the second terminal receives the data packet and outputs an image mapped to the video event index of the images stored in advance. Thus, by transmitting and receiving a predefined index alone without transmitting user and terminal states as a real time data-type image, the VoIP video communication method and apparatus prevent unnecessary waste of bandwidth in video communication.

Method and apparatus for VoIP video communication

A method for scaling a display size between different types of user agents. The method includes exchanging session initiation protocol messages including media information when performing a call setup for setting up a media session between the user agents; determining any one of the user agents to scale the display size from the exchanged media information; and scaling, by the determined user agent, the display size on the basis of the media information, and sending video data subject to the scaling to the other user agent(s).

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Seoul, South Korea

Ji-youn Jung