Kt Corporation

Airpoint

Byung-Soo Chang

Seong-Choon Lee

Jong-Sik Lee

Eun-Kyoung Paik

Sung-Jun Baik

Jeong-Hwi Kim

Nak-Jung Choi

Min-Ji Nam

Ji-Ho Ryu

Se-Jun Park

Yang-Hee Choi

Kyoo-Tae Ryoo

Provided are a peer MR authentication method, a multiple peer CoAs registration method, a failover method for multi-homed mobile networks, and a computer readable recording medium thereof. The registering method includes the steps of: a) determining whether a second MR is around a first MR; b) at the first MR, transmitting a peer request message to the second MR; c) at the first MR, requesting a HA of the first MR to authenticate the second MR; d) at the HA, transmitting a peer registering request message to the second MR with a prefix of the first MR that transmit the authentication request message to perform RR authentication; and e) at the HA, notifying the authentication result of the second MR to the first MR when receiving a RR authentication result message including the prefix of the first MR to be registered as a peer from the second MR.

Peer mobile router authentication method, and multiple peer care-of addresses registration method, and mobile router failover method for multi-homed mobile networks

An adaptive feedback estimation and cancellation (AFEC) apparatus includes: a controller for generating and outputting control information by using a synchronization signal from an external synchronization acquisition unit and base station information, in order to remove a feedback signal that exists in a forward/reverse repeater signal to be repeated and then send the forward/reverse repeater signal; a first feedback prediction canceller for adaptively removing a feedback signal that exists in the forward repeater signal based on the control information from the controller and automatically adjusting the gain of the forward repeater signal; and a second feedback prediction canceller for adaptively removing a feedback signal that exists in the reverse repeater signal based on the control information from the controller and automatically controlling the gain of the reverse repeater signal.

Adaptive forward error corrector and method thereof, and TDD radio repeating apparatus using the same

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Gyeonggi-do, South Korea

Byung-Soo Chang