Electronics and Telecommunications Research Institute

Eung Bae Kim

Seung-Hwan Lee

Jee Hyeon Na

Hyun Seo Oh

Yeon Seung Shin

Nam Il Kim

Bub Joo Kang

Jae Ryong Shim

Chae Min Park

Seung-Kwon Back

Disclosed is a controller managing a base station in a heterogeneous network environment constituted by a macro base station and a small cell base station group, including: a traffic managing unit managing traffic of the small cell base station group; and an operation controlling unit controlling an operation of at least one peripheral base station included in the small cell base station group based on the traffic of the small cell base station group, wherein the small cell base station group includes a center base station and the at least one peripheral base station and the small cell base station group is disposed in a macro cell configured by the macro base station.

Controller for managing base station in heterogeneous network environment and managing method of the controller, and base station managing system

A symbol synchronization apparatus and method for synchronizing symbol digitally is disclosed. In the present invention, digital symbols are generated by an A/D converting unit. Based on digital symbols, a symbol timing value is calculated. The symbol timing value is used for determining a best symbol timing. According to the best symbol timing, a clock phase is determined and A/D converting unit uses newly determined clock for generating digital symbols. As a result, the present invention can perform an over-sampling process in higher resolution than a sampling frequency by using only one A/D converter. Therefore, the present invention may increase economic efficient and reduce complexity of hardware.

Apparatus and method for digital symbol synchronization

Generally, Reed-Solomon encoding process in the conventional communication system is executed by a Reed-Solomon encoder having different code rates for different data transmission rates. The present invention does not use a Reed-Solomon encoder having different coding rates, but instead uses a Reed-Solomon encoder having the same code rate regardless of data transmission rate. Accordingly, the present invention has the following effects. The present invention maintains same communication quality regarding data services having each different data transmission rate, and can use a single Reed-Solomon encoder.

Channel encoding apparatus using single concatenated encoder

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Daejon, South Korea

Eung Bae Kim