Abstract: A Peer-to-Peer (P2P) based social networking service method for providing a social networking service, includes transmitting a request to a peer group and performing a group-based social networking service; transmitting news or a question to peers in the peer group, and then receiving a response to the question; and storing the received information in a storage medium, and uploading specific information among the stored to a rendezvous peer. The method further includes delivering the uploaded specific information to another rendezvous peer in a network. A P2P based social networking service system includes a P2P middleware unit for providing services of communicating between and grouping the peers; a P2P service application program interface layer for providing a network element function; and a P2P application service layer for calling the network element function, if required, to thereby provide a user with a P2P based network service.

Abstract: A Viterbi decoding apparatus receives a plurality of block data in time order, and transmits a block data group including the plurality of block data. Then, the Viterbi decoding apparatus applies a Viterbi decoding algorithm to the block data group and outputs some block data of the block data group. In this way, it is possible to provide a Viterbi decoding apparatus that can operate at a high speed and improve a data transmission rate.

Abstract: A method of creating a security group over a Peer-To-Peer (P2P) network is disclosed. An invitee terminal attaches a public key to a peer advertisement in which its own identification information is encrypted using its own private key, and then sends a resulting peer advertisement over the P2P network. An inviter terminal, which has found the peer advertisement, encrypts a group advertisement, including group information about the security group, using public keys of the corresponding invitee terminal, and then sends a resulting group advertisement to the invitee terminal desired to be invited to the security group. The invitee terminal decrypts the group advertisement using its own private key, and participates in the security group using the group information.

Abstract: A wireless communication system includes a heterogeneous wireless station for transmitting and receiving a heterogeneous wireless station signal; and a detection and avoidance device for detecting the heterogeneous wireless station signal, and for transmitting and receiving an ultra-wideband signal, the ultra-wideband signal with a reduced output or the ultra-wideband signal shifted to another ultra-wideband or ultra-wideband group in order to prevent interference with the heterogeneous wireless station based on a predetermined level.

Abstract: Provided are a position tracking system and a position tracking method. The position tracking system includes at least one target node, a plurality of reference nodes having position information, and a position determination device. An arbitrary reference node among the reference nodes and the target node utilize a distance measurement message to measure a first time of arrival (TOA) and then transmit the first TOA to the position determination device. At least two other reference nodes adjacent to the arbitrary reference node and the target node listen to the distance measurement message to measure a second TOA and then transmit the second TOA to the position determination device, in order to track a position of the target node.

Abstract: Provided is a system and method for controlling synchronization of media and multi-devices for an SMMD media service. The system includes a metadata managing unit and a synchronization controlling unit. The metadata managing unit analyzes ne-media to extract metadata. The synchronization controlling unit constructs a synchronization information table to store control data extracted from the metadata, and controls one or more devices for media reproduction on the basis of the synchronization information table. Optimal connectable devices are mapped according to device attributes and synchronization information extracted from metadata of ne-media and the results are controlled according to the contents of media, thereby maximizing the effect of vivid media reproduction.

Abstract: An FIR filter of a DS-CDMA UWB modem transmitter and a control method thereof are disclosed. The FIR filter includes an LUT control device for outputting a resultant value of “0” to all adders if data values corresponding to upper three chips H2, M2 and L2 and lower three chips H, M and L are “000000”, and discriminating which group between a first group and a second group the upper/lower data values belong to if the upper/lower data values are not“000000”. The LUT control device provides upper or lower LUT values to the adders using the upper or lower LUT values as they are, or converts the upper or lower LUT values into 2's complements and provides the converted values to the adders according to the discriminated first or second group.

Abstract: The hands-free function provision apparatus for use in the mobile communication terminal using the ZigBee protocol includes: a mobile communication terminal for performing transmission/reception of a voice signal via a base station; a ZigBee coordinator for transmitting or receiving a predetermined display signal and a call control signal for establishing a call connection state to/from the mobile communication terminal, modulating or demodulating the predetermined display signal, the call control signal, and the voice signal using the ZigBee protocol; and a ZigBee device for performing wireless transmission/reception with the ZigBee coordinator by modulating or demodulating the predetermined display signal, the call control signal, and the voice signal using the ZigBee protocol, and visually providing the predetermined display signal.

Abstract: Provided are an open home network framework and a method for operating the same. The method includes: forming an user application layer having interfaces to manage an individual service application software and a platform; forming a core framework layer having a framework management function based on an individual service control logic and service control logic for hardware-dependent control; forming a communication layer to process hardware interworking services; forming a service application programming interface (API) for providing interworking interfaces between the user application layer and the core framework layer; forming an adaptor for providing interworking interfaces between service components and legacy components; and forming a communication API for providing hardware-independence between the core framework layer and the communication layer to control a hardware and a device.

Abstract: Provided are a system and a method for allocating wireless resources in a WPAN. The system includes an MAC layer. The MAC layer divides a superframe into a predetermined number of groups, estimates the number of MASs requested by the MAC client and the number of required consecutive MASs, and allows the consecutive MASs to be distributed and allocated for each divided group. With this structure, adjacent clients can use a common MAS and thus a minimum resource is allocated to the adjacent clients in a WPAN.

Abstract: There is provided a method of selling in a shopping mall server. The method includes: displaying at least one sale content as sale information of a product selected to be sold; displaying a interested sale content selected by consumer among the sale contents; performing a payment transaction via a payment system when the selected product is determined to be purchased.

Abstract: Provided are an apparatus and method for managing a Medium Access Slot (MAS) in a Wireless Personal Area Network (WPAN). The apparatus includes a transmission data storage unit for storing a transmission beacon and transmission data; a transmission controller for reading and transferring the transmission beacon to a transmission beacon control signal, and reading the transmission data and transferring it at a corresponding MAS; a transmission beacon parser for parsing the transmission beacon; an MAS allocation unit for comparing the reservation information with queue allocation information of an allocation queue list to allocate MAS; and a superframe controller for generating the transmission beacon control signal, and generating the data transmission/reception control signal at the start time of the MAS allocated by the MAS allocation unit.

Abstract: Provided is an optimum resource allocation method in distributed medium access control in a wireless personal area network, including: defining needed parameters in advance; calculating an overhead AckOverhead needed for an acknowledgement policy and calculating an overhead MasOverhead generated per medium access slot by using the calculated overhead AckOverhead and an amount of the medium access slots which remain after transmitting a frame; calculating the number of frame bits to be transmitted per superframe; determining the number of medium access slots primarily needed per the superframe by using the calculated number of frame bits and the calculated overhead MasOverhead generated per the medium access slot; and optimizing the number of medium access slots finally needed per the superframe.

Abstract: It is possible to intuitively determine whether to control transmission power of a current data transmission rate mode or to change the data transmission rate mode by extracting an automatic gain controller (AGC) index after driving algorithm of an AGC, recognizing a channel clear assessment (CCA) status by using the extracted AGC index, and generating link quality indicator (LQI) information to be transmitted from a physical layer to a media access control (MAC) layer by using the AGC index, when the CCA status is high, in order to embody effective piconets in a multi-band orthogonal frequency division multiplexing ultra-wide band system (MB-OFDM UWB system) including a receiver having a dynamic gain controller(DGC) and the AGC.

Abstract: There is provided a code acquisition device and method using a two-step search process in a DS-CDMA UWB modem. The device includes: an I/Q channel symbol generating unit for, generating a plurality (i) of nth I/Q channel symbols in a first search process and generating a plurality of nth I/Q channel symbols in a second search process; a spread code selecting unit for receiving the plurality of nth I/Q channel symbols in the first search process; an NNC2NS tap I/Q channel symbol matched filter unit for, in the second search process, receiving the plurality (i) of nth I/Q channel symbols; a switching unit for changing to a closed state of the second search process; and a super frame and symbol boundary time deciding unit for deciding a super frame time and a symbol boundary time.

Abstract: A LAN/USB bridge apparatus is provided. The LAN/USB bridge apparatus includes a wireless LAN/USB signal processor and a controller. The wireless LAN/USB signal processor receives a wireless LAN signal transmitted from a wireless LAN access point performing a bridging function between a wired LAN and a wireless LAN, transforms the received wireless LAN signal a UWB (ultra wide band) signal, and transmits the UWB signal to at least one of wireless USB apparatuses. The wireless LAN/USB signal processor also receives a UWB signal transmitted from the wireless USB apparatuses, inverse-transforms the received UWB signal to the wireless LAN signal, and transmits the wireless LAN signal to the wireless LAN access point. The controller controls and manages operations of the LAN/USB signal processor.

Abstract: An apparatus and method for managing and controlling UPnP devices in a home network over an external Internet network. The apparatus comprises a client connected to the external Internet network, and a UPnP proxy server for controlling and managing the UPnP devices in the home network. The client includes a stub for providing the same application program interface (API) as a UPnP API to a user, managing information of the UPnP devices and processing a device control command from the user, and a push client for transferring the device control command processed by the stub to the UPnP proxy server and an event message from the UPnP proxy server to the stub, respectively.

Abstract: There is provided an apparatus for detecting a preamble packet in an orthogonal frequency-division multiplexing (OFDM) system, including: a cross-correlation calculating means for calculating a cross-correlation value between a received signal and previously stored preamble pattern values for an OFDM symbol region (N-point); a delay means for delaying the calculate cross-correlation value as much as a M-point interval; a receiving power measuring means for measuring a receiving power for the guard interval; and a dividing means for calculating a final cross-correlation value by dividing the delayed cross correlation value by the measured power.

Abstract: A frequency estimation method of multiband (MB)-orthogonal frequency division multiplexing (OFDM) ultra wide band (UWB) system using an Alt-PHY time frequency (TF) hopping strategy based on IEEE 802. 15. 3a. includes the steps of: a) selecting a predetermined number of frequencies among a plurality of center frequencies based on a predetermined number of OFDM symbols and estimating relative frequency offsets for selected frequencies; b) obtaining an average relative frequency offset by averaging the estimated relative frequency offsets when two or more frequencies are selected at the step a); and c) obtaining real frequency offsets for each of the center frequencies by transforming the obtained average relative frequency offset to the real frequency offsets and compensating a frequency offset caused by a transmitting/receiving local oscillators based on the obtained real frequency offsets.

Abstract: Provided is a protocol conversion apparatus and method supporting communication between terminals through a protocol conversion when IPv4/IPv6 terminals coexist or a terminal supports an IPv4/IPv6 dual stack in one physical network but an application service supports a specific protocol. A conventional SIIT protocol conversion technique can be used by receiving a communication request through an IPv4 and IPv6 dual stack for a communication request of an IPv4 terminal or an IPv6 terminal, and supporting a protocol conversion between the IPv4/IPv6 terminal through a mapping table mapping respective actual IP address and virtual IP address of the IPv4 and IPv6, and performing communication between the IPv4/IPv6 terminals. Therefore, it is possible to transparently communicate to each other in an IP protocol version. Moreover, a terminal communicates with another terminal in an external network through a conventional protocol or a protocol conversion technique without modification.