公开(公告)号：US12045238B2

公开(公告)日：2024-07-23

申请号：US17859830

申请日：2022-07-07

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyun Jeong Lee ,  Yong-Woon Kim ,  Sangkeun Yoo ,  Changkyu Lee

IPC: G06F16/2455

CPC classification number: G06F16/2455

Abstract: A method for a digital twin federation is provided. The method for a digital twin federation includes: transmitting, by a first digital twin, a connection request including digital twin information for the digital twin federation to a connection broker; receiving, by the first digital twin, connection information of a second digital twin having the digital twin information for the digital twin federation from the connection broker; and performing, by the first digital twin, connection establishment with the second digital twin using connection information of the second digital twin.

公开(公告)号：US10667016B2

公开(公告)日：2020-05-26

申请号：US16010662

申请日：2018-06-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Wook Hyun ,  Changkyu Lee

IPC: H04N21/63 ,  H04N21/435 ,  H04L29/06 ,  H04L29/08

Abstract: Disclosed is a method of adjusting a starting point of a peer, the method including receiving a starting point value and a downloading point value of a counterpart peer from the counterpart peer, determining an initial starting point value of a peer based on the received starting point value and the received downloading point value, calculating a ratio between an average play point move rate (APMR) of the peer and an average fragment reception rate of the peer when the determined initial starting point value is less than the received starting point value, calculating a margin based on the calculated ratio, and determining the starting point value of the peer using one of the received starting point value and the received downloading point value, and the calculated margin.

公开(公告)号：US20240333791A1

公开(公告)日：2024-10-03

申请号：US18414692

申请日：2024-01-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Wook Hyun ,  Changkyu Lee ,  Mi Young Huh

IPC: H04L67/104 ,  H04L45/00 ,  H04L45/02 ,  H04L45/18 ,  H04L45/24

CPC classification number: H04L67/1048 ,  H04L45/02 ,  H04L45/18 ,  H04L45/22 ,  H04L45/24

Abstract: A method of setting a path between peers included in a hybrid P2P network is disclosed. The method comprises transmitting, by a first peer, a primary path setting message for setting a primary path between the first peer and a second peer to the second peer; transmitting, by the second peer, a response message to the primary path setting message including information about a third peer, which is a parent peer of the second peer having a primary path relationship with the second peer, to the first peer; and transmitting one or more messages for setting a vertical candidate path with the third peer between the first peer and the third peer using the information about the third peer.

公开(公告)号：US11509702B2

公开(公告)日：2022-11-22

申请号：US17010876

申请日：2020-09-03

Applicant: Electronics and Telecommunications Research Institute

Inventor： Changkyu Lee ,  Wook Hyun

IPC: H04L65/613 ,  H04L65/70 ,  H04L65/75 ,  H04L65/612

Abstract: A method and an apparatus for selecting and receiving a stream in a distribution network-based multimedia streaming service are disclosed. According to the method, a receiving apparatus receives an index file for a channel from an index server and obtains a time difference between a current time of the receiving apparatus and the start time of the first streaming from the index file. Then, the receiving apparatus selects a fragment including a stream to be received among a plurality of fragments in which multimedia streams are divided and requests the selected fragment.

公开(公告)号：US10819781B2

公开(公告)日：2020-10-27

申请号：US16166404

申请日：2018-10-22

Applicant: Electronics and Telecommunications Research Institute

Inventor： Changkyu Lee ,  Wook Hyun ,  Mi Young Huh ,  Shin Gak Kang

IPC: H04L29/08 ,  H04N21/63 ,  H04N21/41 ,  H04N21/43

Abstract: Disclosed is a display device connection method for rapidly delivering data to a plurality of display devices. A peer-to-peer (P2P) overlay network including the plurality of display devices as member peers is configured to distribute content. In this case, an overlay management server (OMS) connects first member peers through a network as a tree topology using a source peer providing the content as a root node, and transmits fragments of the content to a child peer based on a number of peers to which each of the member peers is capable of transmitting the fragments of the content for a preset period of time, and the source peer directly transmits the fragments of the content to a second member peer that is not included in the tree topology among the member peers based on a predetermined limit on a hop count.

公开(公告)号：US20180367588A1

公开(公告)日：2018-12-20

申请号：US16010673

申请日：2018-06-18

Applicant: Electronics and Telecommunications Research Institute

Inventor： Wook Hyun ,  Changkyu Lee

IPC: H04L29/06 ,  H04L29/08

Abstract: Disclosed is a peer and an operation method of the peer, the method including receiving, from a partner peer, buffermap timetable (BTT) information associated with a buffermap of the partner peer, verifying whether a difference value between a forced delay and time information of the peer corresponds to the BTT information, requesting, when the difference value corresponds to the BTT information, a fragment of a fragment number corresponding to the difference value from the partner peer, and deriving, when the difference value does not correspond to the BTT information, the fragment number based on the BTT information.