Sk Telecom Company, Ltd.

Sk Planet Co., Ltd.

Jong Tae Ihm

Jae Hwang Yu

Dong Hahk Lee

Goon Seop Lee

Chang Seok Lee

Chae Hwan Cho

Suk Yon Kang

Yong Gil Park

Se Hyun Oh

Seung Yoon Baek

Woo Jin Shim

Ku Ik Chung

Yong Sik Shin

Young Sik Shin

Si Hoon Ryu

Ho In Jeon

Sung Hoon Lee

Hye Jin Lee

Seong Soo Park

Sang Shin Lee

Jin Hee Han

Hye Joo Lee

Jin Hyo Park

Kang Il Koh

Byeong Cheol Ahn

Bok Cheol Shin

Se Jung Lee

Chi Young Ahn

Sang Jin Park

Yong Hee Lee

Kyo Hoon Son

A mobile terminal device for positioning, includes: a wireless local area network (WLAN)/wireless personal area network (WPAN) communication unit to acquire identification information of one or more WLAN/WPAN communication modules of one or more adjacent other terminal devices; a request unit to transmit the identification information of the WLAN/WPAN communication modules to a service server to inquire about service subscription/unsubscription and request location and state information of the adjacent other terminal devices that are service subscribers; and a user interface unit to receive location and state information of the adjacent other terminal devices from the service server and display the location and state information on a screen.

Location and state information providing/inquiring system using WLAN/WPAN communication, log information providing/inquiring system and method, service server and customer terminal, location and state providing/inquiring method

A location and state information providing/inquiring system using WLAN/WPAN communication, log information providing/inquiring system, service server, customer terminal, location and state information providing/inquiring method, and log information providing/inquiring method are disclosed. System for providing/inquiring location and state information by using WLAN/WPAN communication includes: mobile terminal including WLAN/WPAN communication module for acquiring and transmitting identification information of one or more WLAN/WPAN communication modules of one or more adjacent other terminals; service server for storing identification information of subscriber terminals, receiving identification information of WLAN/WPAN communication modules from mobile terminal, and transmitting list of service subscribers; and positioning server for positioning subscriber terminals of service subscribers, and if one or more service subscribers are selected by mobile terminal based on list received from service server, transmitting location and state information of terminals corresponding to service subscribers selected to mobile terminal.

The present invention relates to a method and to a wireless personal area network (WPAN) device in which the device sets the beacon slot in the WPAN device and receives beacon slot information from neighbor devices, while setting the beacon table of the devices, to avoid the transmission time of the neighbor devices and the transmission time of the devices neighboring the neighbor devices in a WPAN. In the method, beacon message, including information about neighbors' transmission time and information about neighbors' neighbors' transmission time, is received from neighbor devices. The beacon message is combined, and the neighbors' transmission time information and the neighbors' neighbors' transmission time information are input into a beacon table. The neighbors' transmission time and the neighbors' neighbors' transmission time are input into a field for BTTSs to be avoided in the beacon table. The first beacon slot is set, as my beacon transmission slot, among beacon slots except for the transmission time input into the field for BTTSs to be avoided. Information about the set beacon transmission slot is input into a field for my BTTS in the beacon table.

Method for allocating a beacon slot using a beacon table in wireless personal area network (WPAN) and WPAN device

A location positioning methoded device using a wireless LAN signal, comprising: a database that includes a first DB, which matches grid cells distinguished by pCell ID with partial wireless LAN-related information related to a wireless LAN signal and stores the matched information, and a second DB, which stores overall wireless LAN-related information related to the wireless LAN signal; an information reception unit that receives terminal wireless LAN-related information from a terminal, which performs communication by using the WLAN signal; a record determination unit; and a location positioning unit.

Location positioning method and device using wireless LAN signals

Disclosed are an apparatus and a method for voice processing in a mobile communication terminal. A plurality of microphones are used to remove environmental noise at the time of voice communication, so that it is possible to perform high-quality voice communication and video telephony. Moreover, it is possible to perform voice recording even when a user does not open a mobile communication terminal. Furthermore, when voice is recorded or sound is recorded during moving image photographing, a plurality of microphones are effectively utilized to achieve good-quality recording and to perform recording conveniently even when the folder or the slider of the mobile communication terminal is closed. Therefore, it is possible to provide improved convenience in using the mobile communication terminal.

Apparatus and method for voice processing in mobile communication terminal

A chip equalization apparatus and method for selecting cluster signals from broadcast signals being continuously received in multi-path channels for extracting a plurality of cluster signals from among the received broadcast signals and using a plurality of chip equalizers each having a tap coefficient update part for updating the tap coefficients of the selected cluster signals when the equalization outputs are combined to compensate the broadcast signals and provide low power consumption and efficient equalization for use in a satellite broadcasting receiving system.

Chip equalization apparatus and method thereof

The present invention relates to a system and method for providing a supplementary information service related to broadcast content. The system for providing a supplementary information service related to broadcast content being broadcasted to user terminal comprises a Time Information Creating Server for Identifying a start time information of the broadcast content; and a Supplementary Information Service Providing Server for receiving the start time information of the broadcast content from the Time Information Creating Server, calculating elapsed time for a specific scene based on the start time information, and providing a user terminal with an supplementary information corresponding to the scene based on the elapsed time, through a communication network. And the method for providing a supplementary information related to broadcast content being broadcasted to user terminal comprises steps of identifying a start time information of the broadcast content; calculating elapsed time for a specific scene based on the start time information; and providing a user terminal with an supplementary information corresponding to the scene based on the elapsed time, through a communication network.

System, server and method for providing supplementary information service related to broadcast content

Disclosed herein is a system and method for providing a supplementary information associated with a broadcast content. The system provides a supplementary information associated with a specific broadcast program in the broadcast content by means of a supplementary information server, wherein the supplementary information server comprises a broadcasting receiving unit for receiving the broadcast content; a synchronization information unit for storing a synchronization information of the supplementary information associated with the specific broadcast program; a video comparison unit for comparing screens of the broadcast content with a previously stored scene change screen of the specific broadcast program and setting a start time of the specific broadcast program; a supplementary information extracting unit for calculating an elapsed time from the start time of the specific broadcast program to a specific screen and extracting the supplementary information corresponding to the elapsed time. The supplementary information associated with the specific broadcast program in the broadcast content is provided through the steps of receiving a synchronization information of the supplementary information associated with the specific broadcast program; setting a start time of the specific broadcast program by comparing screens of the broadcast content with a previously stored scene change screen of the specific broadcast program; calculating an elapsed time corresponding to a specific screen based on the start time; extracting the supplementary information corresponding to the elapsed time.

System and method for synchroning broadcast content with supplementary information

The present invention relates to a method of efficiently assigning addresses in a WPAN and a WPAN device. The address assignment method of the present invention is performed by a higher device. Address assignment information for determining an address to be assigned to a lower device, is managed. An address is assigned to a lower device that requests connection from the higher device based on the address assignment information. The address assignment information is updated to a address value as the address value is assigned, and the updated address assignment information is transmitted to lower devices. If an update of address assignment information is requested by the lower device that assigned an address value to a device lower thereto, the address assignment information is updated and the updated address assignment information is transmitted to lower devices.

Method for allocating an address of device in wireless personal area network (WPAN) and WPAN device

The present invention relates to a method of determining at least one traffic route in an MPLS (Multi-Protocol Label Switching) network. In this route determining method, when a traffic is arrived at an ingress edge router, the edge router removes links of remaining capacity below the traffic demand from all links of a given MPLS network to produce the first network topology, calculates distance of every link of the first network topology based on current traffic flowing each link and the traffic demand, determines the first route for the traffic demand based on the calculated distance information; removes links of remaining capacity below the traffic demand and links belonging to the first route from the MPLS network to produce the second network topology, calculates every link distance of the second topology based on current traffic flowing each link and the traffic demand, determines the second route for the traffic demand based on the distance information obtained from the second topology, partitions the arrived traffic into two portions, and allocates the two portions to the first and the second route, respectively.

Route determining method in a multi protocol label switching network

A point-to-multipoint traffic routing method that routes a multicast traffic through a determined tree on an MPLS network. A node on an MPLS network conducting a point-to-multipoint traffic routing method receives a message with an object including topology information on a determined tree, determines whether itself is a copy node or not based on the topology information, and copies, if determined to be a copy node, the received message to transmit to at least two nodes specified as next by the topology information. The present routing method ensures smooth operations of a copy and a merge node as well as an overall network.

Method of routing point-to-multipoint traffic on an MPLS network

The present invention relates to method and apparatus of analyzing a wired/wireless communication network to optimize performance of the network. In the present invention, data are continuously gathered from all elements constituting a wired/wireless communication network and are analyzed to find an element of which performance and/or efficiency deteriorates. If found, an optimal plan to resolve low performance and/or efficiency is chosen through the data analysis and is then provided in real time. The present invention also relates to a recording medium storing computer programs to conduct said procedures.

Network analyzing method and apparatus for optimal performance of network, and a recording medium having programs to conduct said method

In an orthogonal frequency division multiplexing (OFDM) system, a receiver includes a received signal transformer, a frequency offset estimator and a frequency compensator. The received signal transformer removes from a training symbol a guardtone and a sub-carrier deviated from a mean value of effective sub-carrier signals by over a predetermined value. The frequency offset estimator estimates the frequency offset of the OFDM digital signal and the frequency compensator compensates the frequency offset of received signals by using the estimated frequency offset. Thus, data transmission efficiency can be greatly improved and influence from a frequency-selective noise channel can be minimized. Further, by removing data unnecessary for the frequency offset estimation, the calculation amount can be reduced.

Growing community of inventors

Seongnam-si, South Korea

Jong Tae Ihm