Sk Telecom Company, Ltd.

Sk Planet Co., Ltd.

Sung Cheol Hong

Jae Hwang Yu

Se Hyun Oh

Woo Jin Shim

Yong Gil Park

Jun Hyung Kim

Young Woo Kim

Jong Woo Choi

Kyeong Seok Kim

Eon Hwa Jeong

Gi Seon Nam

Min Ju Choi

A local wireless signal receiving apparatus using digital RF processing technology including: a receiving digital RF processor receiving an RF signal and detecting an IF signal from the received RF signal; a zero-crossing signal detector detecting a zero-crossing signal from the detected IF signal, and converting the detected zero-crossing signal into a digital signal; and a receiving signal processor converting the digital signal into a local wireless signal.

Local wireless signal transmitting/receiving apparatus and method using digital radio frequency processing technology

The present invention relates to a system and to a method for QoS (Quality of Service) support in a ubiquitous sensor network. The system for QoS support in a ubiquitous sensor network includes a mesh coordinator and nodes. The mesh coordinator organizes a super frame containing a dedicated QoS data transmission period, and synchronizes each of the nodes constituted into one network with the abovementioned super frame. The nodes create a beacon frame containing information on whether or not to set QoS, to broadcast the beacon frame in a dedicated beacon period of the super frame if QoS data transmission is needed, to create a QoS data frame with a set priority, and to transmit the QoS data frame to the dedicated QoS data transmission period of the super frame in the case of transmitting QoS data. The present invention divides QoS data from general data to improve the quality of data transmission and ensure stability, and prioritizes QoS data to transmit the most important data among QoS data in a quick and stable manner.

System and method for QoS support in ubiquitous sensor

The present invention relates to apparatus and method of providing a multimedia advertising service through a mobile communication network. In the present invention, a content server downloads ad contents to a mobile terminal along with content-displaying condition and the mobile terminal having received the ad contents displays the received ad contents according to the content-displaying condition when an event specified by the content-displaying condition occurs. Afterwards, a content-displayed history is uploaded to the content server by the mobile terminal.

Multimedia advertising service through a mobile communication network and multimedia content controlling apparatus and method of a mobile terminal supporting said service

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Seoul, South Korea

Sung Cheol Hong