Electronics and Telecommunications Research Institute

Ilkyun Park

Jai Sang Koh

Byung-Tak Lee

Nac Woo Kim

Sangkyune Kim

Byongkwon Moon

Kyunghun Kim

Seokkap Ko

Provided are a channel server, a channel prediction server, a terminal, and a method for a fast channel switching. The channel server may generate at least one delay multicast stream from an original multicast stream by applying a different delay value based on channel preference information, and may determine an optimal multicast stream from the at least one delay multicast stream, and transmit, to a terminal, response information associated with the optimal multicast stream in response to query information associated with the original multicast stream received from the terminal.

Channel server, channel prediction server, terminal, and method for fast channel switching using plurality of multicasts interoperating with program rating prediction

Disclosed is a multicast controlling apparatus and method in a multi hop network. The multicast controlling apparatus in the multi hop network includes a packet determining unit to receive a packet from a group management query device or a station, and to determine whether the received packet is a group management protocol packet, a packet type distinguishing unit to distinguish a type of the received packet when the received packet is determined as the group management protocol packet, and a packet transmitting unit to transmit the packet to a second port excluding a first port that receives the query message, when the received packet is determined as the query message.

Apparatus and method for controlling multicast in multi hop networks

Growing community of inventors

Seoul, South Korea

Ilkyun Park