Solid, Inc.

Ho Sik Jang

Dong Hee Kwon

Hoo Pyo Hong

Woo Jae Kim

Jeong Won Kang

Dae Young Kim

Young Man Cho

Kyung Eun Han

Hyoung Ho Kim

Hyong Ho Kim

Jin Hwa Ku

A method of combining compressed uplink signals according to one aspect of the present disclosure is a method of combining IQ data of uplink signals compressed without decompression by a block floating point compression method, a block scaling compression method, or a-law compression method.

Method of combining compressed signal

A fronthaul multiplexer according to one aspect of the present invention combines uplink packets in a compressed state that is received from two or more radio units so that the uplink packets are accumulated and combined immediately when received or the uplink packets are recompressed using a compressing method with high compression efficiency when stored in a memory in order to reduce a use amount of memory.

Fronthaul multiplexer

A distributed antenna system of the present invention implements duplication by a method of configuring a first headend unit and a second headend unit in an active state or in a standby state and connecting a hub unit or a remote unit to the first headend unit and the second headend unit and by a method of connecting, through a redundancy link, a hub unit or remote units of a branch group branched from and connected to each headend unit, activating the redundancy link according to the control of an active headend unit when an error occurs in a frame transmission path, and changing logical port states of a hub unit or remote units that cannot transmit frames due to the error in order to change the frame transmission path so that frame transmission is possible through the activated redundancy link.

Redundancy of distributed antenna systems

Growing community of inventors

Seongnam-si, South Korea

Ho Sik Jang