Electronics and Telecommunications Research Institute

Yun Hee Cho

Jyung Chan Lee

Jae Su Song

Hyun Woo Lee

Eun Kyung Kim

Seung Hwan Lee

Jae Heung Kim

Joon Ki Lee

Tae Joong Kim

Ji Yeon Kim

Seung Kwon Baek

Mi Young Yun

Seok Ki Kim

Kwangjoon Kim

Hyung Jin Kim

Gweon Do Jo

Seung Il Myong

Soo Jung Jung

Seok Seo

Jin Up Kim

Seong Chul Cho

Seung Kwon Cho

Won Ik Kim

Sung Pil Shin

Sei Yun Shin

Seung Ii Myoung

An operation method of a first communication node, which controls a plurality of communication nodes included in a mobile xhaul network supporting mobility, may comprise performing an attach procedure between the first communication node and a second communication node among the plurality of communication nodes; configuring a path for communications between the second communication node and a third communication node for which attach procedure has been completed among the plurality of communication nodes; and supporting communications of the second communication node and the third communication node using the configured path.

Operation method of communication node supporting mobility in communication network

Provided is an antenna apparatus equipped with a single RF chain. The antenna apparatus includes: a combiner configured to divide omnidirectional space into N sectors to perform a sector sweep, combine a reception signal received via the single RF chain for each sector and calculate a gain of a composite signal; a comparator configured to determine a gain magnitude of the composite signal; and a controller configured to perform a beam-forming according to a comparison result of the gain magnitude of the comparator.

Antenna apparatus and method for beam forming thereof

The present invention relates to a scheduling apparatus of a base station supporting Automatic Repeat reQuest (ARQ) method. In particular, the present invention discloses scheduling a data unit transmitted to a mobile station from a base station providing ARQ method for correcting an error in wireless data communication and generating a high rate frame. According to the present invention, there is provided a transmission controlling apparatus comprising a receiver to receive mobile station status information from a mobile station connected with a base station, a schedule managing unit to determine transmission priority of a plurality of data units to be transmitted to the mobile station based on the received mobile station status information, and a transmitter to transmit the data units to the mobile station based on the determined transmission priority.

Apparatus for scheduling transmission of data unit in base station

Provided are an optical transponder that processes a G.709 frame that includes an overhead for operation, administration, and maintenance of an optical channel and an overhead for forward error correction, and a method of detecting and treating errors in optical-channel sublayers of the same. The method includes detecting an error signal or a maintenance signal from a G.709 frame that includes an overhead for operation, administration, and maintenance of an optical channel and an overhead for forward error correction; treating errors in a predetermined layer of a plurality of layers that requires error treatment when the error signal or the maintenance signal is detected or canceled; and investigating a reason for the errors in the predetermined layer.

Optical transponder and method for detecting and treating errors in optical channel sublayer of the optical transponder

The present invention provides an optical transponder with an add/drop operation function of optical channels, which combines operating functions of adding and dropping type optical transponders in accordance with mounting of a digital wrapper to simultaneously process two optical channels. The optical transponder receives an optical signal, converts the optical signal into electrical signal, adds maintenance information, monitoring information, and error correction information to each of the converted signals, and detects the maintenance information, monitoring information, and errors contained in each of the signals. Furthermore The optical transponder corrects the detected errors, and transmits the signals having the maintenance information, monitoring information, and error correction information and the signals of which errors are corrected.

Optical transponder with add/drop operation function of optical channels

Growing community of inventors

Daejeon, South Korea

Yun Hee Cho